hydrostatic driven dozer

In the 21st century, Swamp crawler dozer the overall pattern of China's crane industry has undergone great changes. There are always new companies to enter the tower crane industry, hydrostatic driven dozer it is estimated that China has more than 400 tower crane manufacturing enterprises (including enterprises above designated size has more than one hundred)

Chinese crane industry from the operation of contrast with the real estate investment analysis

Chinese crane industry from the operation of contrast with the real estate investment analysis, swamp hydraulic crawler dozer crane industry has the characteristics of leading indicators for the real estate industry, changes in real estate investment in the crane industry a year in advance is displayed. Therefore, based on the current domestic and international economic situation, combined 2003--2011 development of China tower crane market, industry sales revenue in 2012 is expected to be close to 19 billion yuan, high driven bulldozer an increase of about 10%, slightly down compared with 2011.

Although prime rate canceled

Although prime rate canceled, Tractor bulldozer raise the down payment, the purchase and other factors will continue to plague the real estate industry in 2012, but considering the position the next time the real estate industry as a pillar industry of the unshakable, strong demand for real estate market rigidities and other factors, is expected to 2012 real estate industry is still on the rise, Mechanical Drive Crawler Bulldozer the protection of housing construction will become an engine for development.

the drive sprocket set away from the high ground

Front and rear guide wheel high driven bulldozers drive sprocket and walking system triangular arrangement, the drive sprocket set away from the high ground, to avoid the traditional bulldozer contact with the ground due to the drive sprocket suffered a direct impact load, so that the drive significantly improve the life of the system. mechanically driven bulldozer is doing the best global Caterpillar, currently the only Vision Engineering technology is mature and has formed a production. Vision Engineering since 1993 to develop and produce high drive bulldozer, 2003 batch to domestic and foreign markets, there are SD7 (230HP), SD8B (320HP), SD9 (430HP) 3 major product lines.

This is the third stage of the motorcycle - maturity.

After the 20th century, after 30 years, with the continuous progress of science and technology, bulldozer hydraulic cylinder motorcycle production and use of the suspension shock absorber system, mechanical ignition system, mechanical drum brakes, chain drive, so that the motorcycle has climbed to new stairs, motorcycles gradually mature, Mechanical Transmission dozer widely used in transportation, competition and military aspects. This is the third stage of the motorcycle - maturity.

Hydrostatic bulldozer

Composition and working principle of hydraulic and electrical systems bulldozers bulldozers knowledge of safe operation and maintenance of knowledge, typehydrostatically drive crawler tractor, the overall structure and application, bulldozers major component structure and working principle parts, bulldozer common failure modes and causes of failure,Hydrostatic bulldozer knowledge of other typical form bulldozer damage and repair methods bulldozer wearing parts

Farming Crawler Dozer

our founding fifty years of socialist construction practice fully explain, if not a lot of quality bulldozer, it is impossible to complete the country's high-speed high-quality construction projects.hydraulic drive bulldozers As for the sparsely populated, narrow Face, poor working conditions, alpine desert, strict quality requirements of engineering projects, Farming Crawler Dozer not the quality of the bulldozer is absolutely impossible to complete the task.

military engineering and other construction projects

Hydraulic technology-based engineering Mechanical Bulldozer is a typical earthwork construction equipment, hydraulic dozer bulldozer with the traditional mechanical, as in the national economy and building the country, occupy an important position. It is widely used in railway construction, highway construction, airport construction, water conservancy projects, housing construction, municipal engineering, port construction, mechanical dozer mining engineering, underground engineering, military engineering and other construction projects

ports and irrigation and water conservancy construction projects.

Composition and working principle of hydraulic and electrical systems bulldozers bulldozers knowledge of safe operation and maintenance of knowledge, typehydrostatically drive crawler tractor, the overall structure and application, bulldozers major component structure and working principle parts, bulldozer common failure modes and causes of failure, knowledge of other typical form bulldozer damage and repair methods bulldozer wearing parts, elevated driving hydrostatic driven earthmover, hydraulic bulldozer, Wheel bulldozer and military bulldozers, which are intended to expand the students' professional horizons. Highlands Dozer is a classic earthwork machinery, widely used in highway, railway, construction, utilities, ports and irrigation and water conservancy construction projects.

steering clutches and steering brakes, final drives and travel systems.

hydrostatic drive dozers expand the development of product types, both to meet the different conditions of work adaptability, and must maintain maximum parts commonality (or interchangeability) and basic, which for the majority of users maintenance bring great convenience. bulldozer manufacturers mainly by the engine, transmission, equipment, electrical parts, cab and hood and other components. Among them, the mechanical and hydraulic transmission system also includes a torque converter, the coupling assembly, the planetary gear type power transmission, a central transmission, steering clutches and steering brakes, final drives and travel systems.

Chinese bulldozer

Closed system hydraulic oil in the hydraulic system in a closed loop, compact, Chinese bulldozer high transmission efficiency, and the air is not easy to enter, drive smooth and good; but the closed system structure is complex, poor thermal performance. Construction machinery working device actuator control system to intermittent work based on the transmission efficiency is not critical, it is generally the choice of an open system.
Hydraulic driven system from the power components, actuators, control components and auxiliary equipment and piping components.

Mechanical Transmission dozer

Modern construction machinery hydraulic system widely used to manipulate the working device. Hydraulic System bulldozer hydraulic have open and closed loop points. Open system with a tank, simple structure, good heat dissipation, the oil in the tank can be precipitated magazine; Mechanical Transmission dozer but poor organization running smoothly, the energy losses.

construction earthmover

Check the torque converter normal; construction earthmover loosen the screw speed exhaust fine filter on the discharge of oil found in a bubble, and the long endless row. Analysts believe that if the place into the air, cold, heat engine intake should result in a cold state machine is now working properly, it can be concluded Low oil seals in good condition. The high pressure heat engine intake causing the machine can not walk, you should spend a large low-pressure vacuum caused by the oil.Further examination revealed that between the suction port and suction strainer hose has been deflated, into the oil poor, hydraulic dozer manufacturers the higher the engine speed, the more serious this phenomenon. The reason is that the inner hose is aging peeling, peeling after temperature rise into the oil passage blockage, causing a vacuum through the large.

power shift hydraulic dozer

the performance of the pump system to reduce torque variable speed hydraulic oil is mainly provided by a variable speed pump and reduce pump performance, lack of fuel supply system, power shift hydraulic dozer causing hydraulic oil can not fully play the role of the media, while not adequately lubricate all moving parts, so that the friction between the moving parts increases, a corresponding increase in the mechanical heat, but less than the predetermined number of hydraulic oil in the circulation can not be taken away excessive heat,lower price dozer resulting in high oil temperature.

hydrostatically driven crawler tractor

swamp crawler bulldozer with blade lack of fuel tank systems bulldozer working conditions are generally more severe, workplaces large and bumpy slope, fuel shortage will pump cavitation phenomenon occurs, the normal fuel consumption can not supply the hydraulic system, so always check the bulldozer The oil level is necessary. Bulldozers can be placed on flat ground, hydrostatically driven crawler tractor check the oil level on the dipstick, the oil level should achieve the required mark.

High Efficiency Crawler Bulldozer

shift control valve is faulty bulldozer hydraulic system is quite delicate, especially the various hydraulic control valves, valve gear is one of them. Poor cleanliness of hydraulic oil or using improper maintenance,High Efficiency Crawler Bulldozer  will result in the shift valve malfunction, so inadequate fuel supply converter. Especially 160 bulldozer, variable speed torque converter only way hydraulic oil systems, there is a huge shift valve failure impact on the system. In general, the safety valve stuck in the valve gear is the most direct and common form of failure. You can check the shift valve, power shift hydraulic bulldozers the oil inlet pressure (pressure relief valve inlet pressure that speed for 2.5MPa; pressure relief valve outlet pressure converter that between 0.5-0.9MPa), shift valve fails mainly the system pressure is low; the shift valve safety valve should be removed and cleaned, to troubleshoot.

Hill pushed 900 horsepower bulldozer show "Made in China" style

Through two days of inspection preparedness work,swamp crawler bulldozer with blade Shantui service team a comprehensive understanding of the equipment in use and solve the shift pressure is low and some other small problems and improve the stability of the vehicle system operation. Request of the user, Shantui service inspection team and working hydraulic systems of its holdings of other brands of equipment, troubleshoot problems and solve them. The entire inspection process, the user of Shantui Services Group cautious attitude and professional skills thumbs up, said he was very recognition, hope Shantui service personnel to continue to provide assistance and in SD90-5 Mechanical Crawler bulldozer post-maintenance aspect guidance.

Widely used bulldozers

hydraulic bulldozers with traditional Mechanical Crawler bulldozer, as in the national economy and building the country, occupy an important position . It is widely used in railway construction, highway construction, airport construction, water conservancy projects, housing construction, municipal engineering, port construction, mining engineering, underground engineering, military engineering and other construction projects, our founding fifty years of socialist construction practice fully explain, if not a lot of quality bulldozer, it is impossible to complete the country's high-speed high-quality construction projects. As for the sparsely populated, narrow Face, poor working conditions, alpine desert, strict quality requirements of engineering projects, not quality Mechanical Transmission Bulldozer Is absolutely impossible to complete the task.

Mechanical Transmission dozer

Hydraulic technology based on the application Full hydraulic dozer is a typical field of construction machinery in the earthwork construction equipment,A tractor is installed in front of the dozer loaded road construction machinery, for bulldozing, leveling the building venues. For example, in the construction of road construction, the bulldozers can complete the process of subgrade, roadside soil lateral Tim building height of not more than one meter of embankment along the centerline of the road towards the shovel to dig transferred, Mechanical Transmission dozer transported soil roadbed Watian engineering, taking the mountain construction of part - cut soil subgrade. In addition, the bulldozer can be used for leveling the ground and accumulation of loose materials, removal of obstructions and other operations within the lot.

Bulldozer cache design

Each core has a 64KB Track Dozer  level data cache, 64KB instruction cache, 32-entry fully associative data cache page table (DATA TLB), complete out of order load / save unit, which can in each clock cycle Loading 128 within two or load a 128-bit instruction. Each module is equipped with 2MB 16 way associative secondary cache, 124-entry two page table cache can handle instructions and data requests. Bulldozer supports up to 23 secondary cache misses, memory system for maintaining consistency. Finally, all modules with a bulldozer processor core shared 8MB 64 way associative cache levels. Bulldozer significantly improves power management technology, support CC6 power state at the core level, at the module level can be supported by the secondary cache CC6 power gating (Power Gating). With power gating, idle core can be almost completely off, giving the other core leaving more space to accelerate. Full hydraulic crawler bulldozer has three modes of operation: acceleration frequency of the original preset reference frequency, acceleration frequencies all the core open, half of the core open. All core acceleration: If the excess thermal design power (TDP) space allows, bulldozers can be accelerated for all the core

Architecture Analysis

Embarking on designing the next generation x 86 processor cores, when, AMD's engineers considered necessary to achieve the core area of power consumption and optimization, and development of PC applications also allow engineers must find a new path, it is possible between different cores maximize peak bandwidth, and through sharing module to take advantage of every square millimeter of the core area. The end result is the ability to efficiently optimize the dual-core modular resources. Integer pipeline, a data caching frequently used features in each core has a separate functional units, prefetch, decode,drive bulldozers， floating-point pipeline, the secondary cache and other functional units in the two core in shared use. This design allows each core can use when you need a larger, higher-performance functional unit than each core has its own small independent functional units more economical core area. This design concept is a direct manifestation of the core area. Eight-core Bulldozer is AMD manufactured the history of the largest chip integrates approximately 1.2 billion transistors, but the application, the core area through the rational allocation of functional units,construction earthmover as well as the new 32nm SOI process is controlled only to 315 mm2, more than six-core, 45nm process Phenom II X6 9 percent smaller than the quad-core, 32nm HKMG technology Sandy Bridge only 46% larger

Information about high drive bulldozer

Front and rear guide wheel high driven bulldozers drive sprocket and walking system triangular arrangement, the drive sprocket set away from the high ground, to avoid the traditional bulldozer contact with the ground due to the drive sprocket suffered a direct impact load, so that the drive significantly improve the life of the system. mechanically driven bulldozer is doing the best global Caterpillar, currently the only Vision Engineering technology is mature and has formed a production. Vision Engineering since 1993 to develop and produce high drive bulldozer, 2003 batch to domestic and foreign markets, there are SD7 (230HP), SD8B (320HP), SD9 (430HP) 3 major product lines

Bulldozer was widely straight shovel

hydraulic track bulldozer uses a wide range of earth-moving machinery is the most commonly used operating machinery, occupies an important position in the earthwork construction. But because there is no wing blade, capacity is limited, in the process will cause earth leakage on both sides, it is not too long haul, otherwise it will reduce production efficiency. Typically small and medium haul bulldozer was 30 ~ 100 m, a large bulldozer haul generally not exceed 150m, bulldozer economic haul distance 50 ~ 80m.
When the transport conditions, earth-moving equipment was lifted lift cylinders, hanging in front of bulldozers; when the bulldozer into the working condition, the lower earth-moving equipment, the blade into the ground, can bulldozing forward, rewind can ground. When the bulldozer for tractor operations, the soil can push device removed.
Typically, hydraulic drive system bulldozers pushed forward dig earth, when the flat ground or piled loose material, widely it straight shovel; shovel or unilateral spoil hillside, often using oblique shovel; shovel cut on the slopes hard soil or digging ditches, using the side shovel.

The main purpose of bulldozers and construction

Mechanical Highlands dozers MYW in front of a crawler tractor or tractor tire mounting earth-moving equipment and operating mechanism of self-catering facilities machinery, mainly used for cutting excavation, backfill excavation, elimination of barriers, clearing the plot snow, land leveling, etc., can also be done short distance transport of bulk material shovel and stacking operations.
Bulldozer with ripper, can be turned loose Ⅲ, Ⅳ level above the hard soil, soft rock or rock chisel crack layer, scrapers and bulldozers to carry out excavation work, can also be used Highlands Bulldozer of direct push scraper blade scraper shovel to increase capacity (so-called shovel bulldozer aid), but also to assist the grader or a scraper to complete the construction work in order to improve the operating efficiency of these machines

History and the type of bulldozer

Bulldozer is a major mechanical earthmoving machinery, according to the walk is divided into two kinds of crawler and tires, because less tire bulldozer.
120KW of power greater than Crawler Earthmover, the vast majority use hydraulic - mechanical transmission. Such bulldozer from the introduction of Japan's Komatsu D155 type, D85 type, D65 type three basic bulldozer manufacturing technology. After localization, stereotyped as TY320 type, TY220 type, TY160 type Basic bulldozer. In order to meet user demand for the use of work conditions, our swamp hydraulic track dozermanufacturer on the basis of the above three basic bulldozer on, expanding product variety, the formation of three series of bulldozers. TY220 bulldozer products, including TSY220 Wetlands bulldozer, TMY220 type desert bulldozer, TYG220 type plateau bulldozer, TY220F Forest logging bulldozer, TSY220H model sanitation bulldozers and pipelayers DG45 type and so on. TY320 and TY160 type series bulldozer also expanding similar products. TY160 series there TSY160L ultra wetlands bulldozer and push TBY160 type Pa machines.

Bulldozer

Biggest bulldozer is an engineering vehicle with a large metal front dozer blade, dozer blade down when in use, and push forward chipping mud, sand and stones, dozer blade position and angle can be adjusted. Bulldozer digging can be done individually, earth and dump work, with flexible operation, convenient rotation required Face small, travel speed and other characteristics. It is mainly applied to three types of soil in a shallow dig short run, such as land clearing or leveling, Currently the world's small swamp bulldozer excavation depth of excavation and backfill little push small building height roadbed.

Bulldozer convenience

The battery at low temperatures, the viscosity of the electrolyte increases, penetration decline, so that the battery capacity increases the internal resistance and terminal voltage decreased significantly,hydraulic track bulldozer not even discharge. Voltage drop so that the output power of the starter not required, it is difficult to reach the starting speed requirements.

Due to the low temperature starting the engine crankshaft speed is not high, the intake pipe temperature and gas flow rates are low, and poor fuel atomization quality, further increasing the difficulty for starting the engine.

At low temperatures, the viscosity of the oil in a large variety of poor mobility, to the operation of the roller makes it difficult, and exacerbated the mechanical wear and tear.

Practical at bulldozers

 which is the prototype of the first roller, appeared in 1860 in France steamroller, to further promote and improve the construction technology and quality gravel road, and speed up the pace. In the early 1900s, the world recognized the gravel road was the most excellent road and promotion in the world, the concept of compacted gradually been known, Rollers also will appear on each road construction site, the mid-19th century,hydraulic track bulldozer the internal combustion engine invention to the development of compaction equipment brought great vitality. The first internal combustion engine driven roller born in the early 20th century. Then there is the tire roller, sheep foot roller compactor wheel with light almost simultaneously produce,  Hydraulic Drive Crawler Bulldozers people still compactor compaction were studied, that weight gain can make the roller compactor line pressure increases, thereby increasing the pressure real effect.

Track Dozer efficiency

cheap track dozer is a blade mounted in front of the tractor load of road construction machinery, for bulldozing, leveling the building venues. Track Dozer in building construction such as roads, the bulldozers can complete the processing of the subgrade, roadside soil lateral Tim building height of not more than one meter of embankment along the centerline of the road to shoveling transfer, transport roadbed soil excavation and filling works, according to Mountain borrow built part - cut embankment. In addition, the bulldozer can be used for leveling the ground and accumulation of loose materials, removal of obstructions in the work area and the like.

Crawler excavators advantage

Crawler bulldozer. From durability, traction, ground pressure is greater than climbing ability, can adapt to harsh working conditions, it has excellent operational capability, but the mechanical quality, high manufacturing costs.

Crawler Bulldozer Performance

Crawler excavators models with dual pump dual-motor hydraulic drive technology, compact structure, flexible operation, safe and reliable, able to adapt to dramatic changes in the external load, cheap track dozer the machine's overall performance greatly improved to meet the requirements of various conditions.

Swamp Bulldozer Performance

swamp hydraulic crawler dozer rugged structure that can withstand the harsh operating conditions of any trial. Heightening type sprocket with modular components to improve productivity, simplify maintenance procedures, downtime, and can be raised or lowered final drives and associated power train components required operating environment, thus helping to extend lifetime powertrain.

Hydraulic bulldozer system

MYW hydraulic track bulldozer Crawler bulldozer mainly by the engine, transmission, equipment, electrical parts, cab and hood and other components. Among them, small swamp dozer mechanical and hydraulic drive system also includes a torque converter, the coupling assembly, the planetary gear type power change speed transmission, the central transmission, steering clutches and steering brakes, final drives and travel systems.

MYW hydraulic drive bulldozers

bulldozer hydraulic cylinder torque converter transmission is to rely on hydraulic works. Fluid flow in the Cascades, due to impact, friction, consumes energy, heat the oil, so torque converter transmission efficiency is relatively low. Bulldozer hydraulic drive system.

Bulldozer is a blade mounted on the front tractor loaded Road Machinery

Track Dozer is an engineering vehicle, equipped with a large metal front dozer blade, dozer blade down when in use, chipping and push forward the mud, sand and stones, dozer blade position and angle can be adjusted. Swamp hydraulic track dozer can do it alone excavators, earth and dump work, with flexible operation, convenient rotation, the Face little need, driving speed and other characteristics. It is mainly applied to three types of soil in a shallow cut short transport, such as land clearing or leveling, excavation depth of excavation and backfill little push to build highly little roadbed.

Hydraulic crawler bulldozer in front of a tractor loaded blade mounted road construction machinery, for bulldozing, leveling the building venues. For example, in the construction of the road construction, the bulldozers can complete the process of subgrade, roadside soil lateral Tim building height of not more than one meter of embankment along the centerline of the road to shoveling transfer, transport roadbed soil excavation and filling works, take the mountain construction of part - cut soil subgrade. In addition, the bulldozer can be used for leveling the ground and accumulation of loose materials, removal of obstructions in the work area and the like.

When the Mechanism drive Bulldozer  issue abnormal sound gear shifting, difficult Nie Kazakhstan
Main reasons: to adjust the dish too tight; adverse effect of the hand brake. When adjusting plate tight, clutch master more difficult, and therefore can not cut off the power, resulting in abnormal noise when shifting gears. In this case, adjust the dial to adjust counterclockwise position, namely adjustment Bulldozer with Universal Blade main clutch, just pull the handle when the master clutch can clearly hear the voice ringing across the dead can be. If the adverse effect of the hand brake, it will cause the main clutch, although separated, but still the main clutch shaft due to inertia in rotation (as required, the main clutch in a separate state, the main clutch shaft should stop within 3s), thus shifting time Gear difficult to engage and abnormal noise. In this case, to be adjusted or replaced with a small brake.

Bulldozer is a major mechanical earthmoving machinery, according to the walk is divided into two kinds of crawler and tires, because less tire bulldozer. This paper describes the structure and working principle of Bulldozer. The basic job of a bulldozer excavation is: A. B. earth C. shoveling dump.
Power greater than 120KW crawler dozer, the vast majority use hydraulic - mechanical transmission. Such Hydraulic Drive Crawler Bulldozers from the introduction of Japan's Komatsu D155 type, D85 type, D65 type three basic hydraulic dozer suppliers technology. After localization, stereotyped as TY320 type, TY220 type, TY160 type Basic track bulldozer suppliers.

Background and Significance bulldozer with hydrostatic drive system

Dozer supplier , with the western development and the country's infrastructure accelerated pace for the development of China's construction machinery industry provides a rare opportunity, domestic all manufacturers have expanded product range in their respective fields, the use of some advanced technology to develop their own products or through the introduction of foreign advanced technology to improve product quality. And made some satisfactory achievements. After China's accession to WTO, foreign advanced technology and products of the influx of China's machinery products market project has also caused a serious impact. For this reason countries have proposed a "construction machinery" Tenth Five-Year Development Plan. "

Although since the 1980s, our country through the introduction, digestion and absorption, the traditional mechanical, hydraulic mechanical dozer from the manufacturing capacity, production scale, the basic approach or reach the level of similar foreign products on the technical level. But in recent years with the rapid development of hydraulic integration technology, the traditional mechanical, hydraulic mechanical bulldozer cumbersome operation, labor-intensive, low productivity, system failures and other shortcomings more so it can not meet the production job requirements, development of intelligent construction machinery has become a trend. With the continuous development of science and technology, hydraulic increasingly showing strong vitality, hydraulic drive foreign technology matures, more and more applications in the bulldozers, a great tendency to replace the traditional forms of transmission. Foreign bulldozer hydraulic transmission theory and technology under wraps. The research aspect of the hydraulic transmission as the basis of intelligence bulldozer has just started, the basic theoretical research in the blank.

Hydraulic bulldozer uses hydraulic - mechanical transmission

120KW of power greater than swamp hydraulic track dozer , The vast majority use hydraulic - mechanical transmission. Track Dozer expand the development of product types, both to meet the different conditions of work adaptability, and must be the basic type utmost parts commonality (or interchangeability), which for the majority of users and maintenance bring great convenience.

Hydraulic crawler bulldozer mainly by the engine, transmission, equipment, electrical parts, cab and hood and other components. Among them, the mechanical and hydraulic transmission system also includes a torque converter, the coupling assembly, the planetary gear type power transmission, a central transmission, steering clutches and steering brakes, final drives and travel systems.
Power output mechanism by way of gear and spline connection driven hydraulic system of the working pump, variable speed torque hydraulic system gear pump, hydraulic steering and braking systems steering pump; sprocket representing secondary spur gear final drive mechanism (including left and right final drive assembly); track shoe assembly includes a track, sets the frame and suspension assembly including a walking system.

Bulldozers transmission - transmission failure

hydraulic tractors and bulldozers was mainly the oil temperature is too high, easy and automatic de-block Guadang, percussive sound. Usually caused by high oil temperature in the transmission oil level is too low, poor lubrication, sometimes bearing load is too large or too tight installation, check the oil level is appropriate, whether the bearing parts of the local temperature is too high, adjust the bearing clearance; Guadang and easy Auto off the block more because gear tooth surface spalling or spline grooves worn appearance, difficulty moving gear, the gap is too large, pin wear, the spring force is too weak, when shifting gear is not fully engage and lock the axle rod adjustment is not correct, etc. , you should check the lock lever on vehicles distance is appropriate, should be renewed insufficient spring force member; there are usually caused by percussion tooth wear, teeth gap is too large or splined Songkuang etc., should be asked to inspect the parts technology area of ​​wear and mating surfaces, so that the transmission after reinstalling the xsound evenly.

Bulldozer Transmission - Steering clutch failure

Steering clutch failure Primarily, skid, steering failure, when the foot pedal is depressed beating. Journal seal wear and damage, lubricants penetrate inside the clutch and turn the main contamination, driven plate and brake band make 100horsepower swamp dozer available gasoline to clean lining of the oil, adjust the brake band out of round, flat file or car contact surface; steering wheel concentric inner clutch outer teeth and the connecting parts of the ultra-poor, causing the foot pedal is depressed when the beating, should be adjusted to the center of the circle degree, it is not greater than 0.4mm.

Bulldozers Transmission - wheels failure

The Hydrostatic truck Bulldozer main fault of the drive wheel, the bearing is damaged, loose screw gearbox, oil seal leak. Bending axle, the deviation of the shaft hole, and the degree of deformation of the end portion of the rear bearing housing can be checked, repaired to reach the technical standards; centering screws secure the bearing hole and the cover hole; reaming dowel hole, reconstituted locating pin; check seals freedom compression height is 8 ~ 10mm; with sandpaper or rasp Shuhei seal the ends, polished guard oil board, its roughness is not greater than 0.5mm; reassembly, replace seals.

How to fix three bulldozers along?

Three bulldozers area belong consumable parts, according to its design and construction conditions the use of life there is a certain number of years, often much lower than the normal life or overhaul life high driven bulldozerother components. For large-scale imports of three small crawler bulldozer area, the use of a newer approach to the old abandoned due to more expensive, maintenance costs too much, and the residual value of the old parts are also being wasted; if they can adopt reasonable repair method, you can greatly Update reduce costs, and to ensure their life, but also much more cost-effective than the use of non-original parts imported or domestic parts in performance price. Caterpillar Farming Crawler Bulldozer below three area repair technology, equipment and effects briefly described as follows:
A repair method and process
Three rounds in the vicinity of wear mainly refers crawler track surface between each wheel housings and rolling and sliding sleeve and drive pin crawler between teeth wear. Analysis shows that when the surface of the wear limit is reached, due to the internal shaft parts in a sealed lubrication, yet most of the failure. At this point, if they can carry out welding repair its worn surface, to restore the original size, you can extend the life of three rounds in the vicinity.
Welding repair ago, the first of the worn surface rust treatment; and then warmed preheated to about 250T, to eliminate these artifacts in use due to rolling. Internal stresses generated by the impact; then with a soft wire bottoming 105B (increase weld strength), general welding 2-3 layers, other dimensions filled with 104 wire. In the weld repair process should select the welding current and wire feed speed according to the size of the wheels and caterpillar thickness, in order to ensure the quality of welding repair and appearance. Workpiece after welding requires incubation (especially in winter), but need not be subjected to surface treatment (due to the choice of solder is very close to the original performance and can achieve the surface hardness of the original).
It is worth mentioning that the wear limit for the amount of wear is not 70% or more than 120% of the area of ​​three, not advocate the use of welding methods to repair, because the workpiece is either a surface-hardened layer is not completely worn away, either shape and other phenomena, welding success rate decreases.
For like wheels, chain links along the circumferential surface of the worn parts, welding methods can be used to repair; and for like caterpillar pin sets this fan-shaped area in less than 180º locally worn parts can be taken to make the process turn sets reuse. Since in most cases, the pin sleeve always wear faster than the external link wear rate (both wear ratio of about 2: 1), especially when the pin sleeve wear limit is reached, the hardened layer has finished grinding, and then continue to use the wear rate will accelerate, and the remaining service life is very short, then the likelihood of oily type of caterpillar increase oil loss, increased chance to say pin wear. Therefore, when it approaches the wear limit promptly turned around and pin set, replace the seals and grease, you can extend the life of the pins set to double, allowing more efficient use of surplus value chain links and pins.
2, the main repair equipment
Tracked face major repair equipment and surfacing machines and three tracked changer, can wear welding surface to restore the original size and welding repair or disassembly is required caterpillar turned pin sets to achieve track shoe disassembly mechanization. These devices high degree of automation, reliability, enabling batch repair. Currently, Beijing, Guangzhou, Jiangsu, Shanxi, Inner Mongolia and other places are from the United States or Japan, the introduction of these devices, users can conveniently serviced.
3, the quality and effectiveness analysis
After repair welding, turning three sets and other craft repair area, its service life can reach 80% -90% of new products, the average repair cost is only about 30% of new products, repair cycle is shorter than the import of new cycle. Therefore, when just at or slightly exceed the wear limit of three area repair, after all, a good way to update.

hydraulic drive system bulldozers

Chinese bulldozer

Must do the proper operation and regular maintenance work.

  1. To make the correct month clutch. When using clutch engagement to smooth, slow, faster separation. Meng Meng can not be used from close approaches to overcome the load. Can not be combined with a half away from the half-way slow down, slip slope, otherwise it will cause early wear of the clutch.

  2. To avoid dozing or unilateral bulldozing steering even when overloaded steering at full load, or unilateral bulldozing will make steering clutch slip, causing unilateral wear. Do not sharp turns, do not overload the job, otherwise it would be tracked skid and cause abnormal wear.

  3. Do not speed operation. High-speed operation will produce severe turbulence. Walk part so mechanical collision cause damage.

  4. Try to take the rough roads. Even if the road is not smooth the path of two cases have good visual crawler, so try to level the bulldozer Rose exercise, reducing bumps and shocks, thereby reducing mechanical damage to the walking part.

  5. regular checks and maintenance.

  (1) Because the job is often the forward and back, easy to make the center a large bevel gear transmission shaking off the bolt analysis, and therefore often to check and tighten the gear meshing.

  (2) Check the tightness on both sides of the crawler, timely adjustment nut tightness that bilateral agreement crawler tightness.

  (3) Check the travel section of each unit nut is loose. Symmetrical pieces can walk part of the change sides use.

  (4) Check the guide wheel, supporting Taiwan wheel seal is leaking and timely repair.

Bridge box after box bulldozer easy to produce cattle major defect types are: Weld incomplete penetration, lack of fusion, weld and weld cracks and other defects; castings cracks, holes through sex, shrinkage and other casting defects; left and right shell precursors of welding parts welding Gading shape and positioning size tolerance, influence and fusion weld. For the following reasons:
  1. Multi-axle box parts, structure and distribution of the weld is more complex, a small space inside the box, welding operation is difficult. As in the outer shell off the floor with Deng drogue site, due to space is too small, the outside bottom of the left and right of the housing connections, unable welding and welding.
Bulldozers rear axle box
  2. screw plate after plate with the left and right casing joints small space, dead and more difficult the larger the welding operation, could easily lead to incomplete fusion welding.
  3. After the board and external connector shell off the corner weld bead easy off, easy to cause incomplete fusion welding.
  4. When the board is connected with the case for unilateral V-shaped internal weld seam, welding slope up poor, could easily lead to poor weld fusion.
  5. dirty bulldozer parts welding parts of the surface residual rust stains, oil, paint and chemical composition of steel blanks failed, causing pores, cracks and other welding defects.
  6. weld seam produced by incomplete fusion, weld, cracks and other defects in the structure of a water leak testing process plants generally easier to be found, and the ability to timely repair welding. But microcracks and small holes and other defects, due to the low pressure of a water leak test method, the leakage site in a relatively short period of time is not easy to be found. Bulldozer parts finishing.

Bulldozer is a simple structure of self-propelled shovel transport machinery. It has a flexible operation, extensive easy to use, application, adaptable and other advantages. Bulldozers are designed in the past, mainly used in construction, mining, road transportation, national defense construction and other construction, can be spread compression and leveling the ground, filling trenches, the accumulation of dirt, gravel and other loose material number operations. Now bulldozers have been used for water conservancy construction.

  Agricultural tractors, are mounted in front of the farm tractor dozer and enhance control mechanism, a tractor with a power shovel cut and pushing soil, gravel and so on. It is mainly used for agricultural engineering land formation, terracing, land reclamation, land reclamation, trenching dig trenches, accumulated dirt and paving and other operations. Strong adaptability of its terrain, you can work on the cross slope 15 ° -20 ° slope; dozer placed in front of the tractor, dozer direction consistent with the tractor forward direction, when the job is open on their own, in potholes or uneven ground Set launder more irregular mountain ravines dozing, still full operating performance, economic haul distance of 20-30 meters, a significant decline in productivity when more than 50 meters.

  Therefore, the process is one of the most important agricultural earthwork construction work tools. Bulldozer drawback is that the deposited amount before the dozer can not be too small economical transportation distance.

  Bulldozer economic haul tractor power size varies with the commonly used dozer economic haul: Large (200 hp) of 50-70 meters, medium (50-100 hp) of 20-30 meters, a small (50 hp ) 10-20 m. If the transport distance over 80 meters, you should use other earth-moving machinery (such as scrapers, etc.) to carry out.

  Our project began production in the early 1950s with a bulldozer. Currently, the project has been developed with a bulldozer to two dozen, they are equipped with power more than 100 horsepower, with crawler majority. Four wheel drive and marshes dedicated bulldozers, underwater bulldozers also began production.

  Our agricultural bulldozer began production in the early sixties, the larger are transplanted from construction machinery, small bulldozer with existing crawler or wheeled tractors for power and self-supporting design made Mi device. At present, agricultural bulldozer minimum power of 20 hp and a maximum power of 160 horsepower.

  Arrangements for agricultural production around the country for more than ten kinds of models bulldozer and are further expanding varieties, models and improve operational performance. In recent years, people around the self-reliance, big way agricultural mechanization, agricultural tractors doubled, increasing the range of mechanical work. In order to achieve mechanized farmland capital construction, not only dedicated agricultural bulldozer gradually increased, and in the provinces unified arrangement of crawler tractors gradually configured single cylinder, twin hydraulic dozer device. Currently, the bulldozer has played a major role in agricultural production.

1. Capstan use tractor PTO shaft driven winch dozer lift. Winch winch lifting mechanism generally consists of front and rear mounting bracket, pulley group and the control mechanism and other components. Tractor PTO shaft through the body of the winch gear drive winch with a friction clutch, and some are using worm gear winch drive. Capstan main features are as follows:

  (1) manufacturing process is relatively simple, reliable transmission.

  (2) by weight dozer buried, complex structure, large weight.

  (3) rapid dozer lift, lift height great.

  (4) wear parts are more easily damaged wire rope, hydraulic operation is not flexible and can not be forced to be buried.

  2. By farm tractor hydraulic dozer and configure a set of hydraulic lifting control system, the use of hydraulic control dozer lift.

  -Cylinder hydraulic lifting mechanism bulldozer is currently developing models. Using single-cylinder hydraulic lifting mechanism is put back in the original tractor hitch hydraulic cylinder to move the front of the motorcycle, driven by a lever transmission mechanism dozer lift. The main features of hydraulic bulldozer as follows:

  (1) can be forced dozer buried, can push more rigid shovel soil.

  Compact (2) structure, light weight, saving steel, better operating performance, easy to manipulate.

  (3) the hydraulic system of pumps, tanks, dispensers and other high technology manufacturing requirements.

  (4) dozer lift slower, usually 0.15 to 0.35 m / sec. In winter, the hydraulic oil thickens flow slows down, lifting more slowly.

Bulldozer by walking device classification

1. Tracked by crawler dozer tractor configuration and upgrade the operating mechanism constitutes the main features are as follows:

(1) large adhesion can give full play to the tractor driving power. Usually equal to 1.5 times the horsepower wheeled tractors.

(2) through the good. Ground Pressure Wheel smaller than for soft soil and wetlands in the job.

(3) climbing ability, generally 20. Can cross the slope slope about jobs, farmland suitable for mountain earthwork construction.

(4) metal consumption more generally consume more material than metal wheel dozer 50-60%.

2. Wheel by wheel dozer tractor configuration and upgrade the operating mechanism constitutes the main features are as follows:

(1) travel speed, mobile. However, when the soil hard work, shoveling deep instability.

(2) economic transportation distance is shorter than the length of crawler twice about the job cycle time. Four-driven crawler ratio of 1.5 times and high productivity.

(3) travel system structure is relatively simple, life 2-3 times longer than the crawler.

(4) consumes less metal. Two driven poor adhesion properties, the job is often due to tire slippage, affecting tractor driving power play.

1. Fixed

  Fixed dozer tractor fixed at right angles to the longitudinal axis. The main features are simple in structure, easy to manufacture, durable, and low cost. General agricultural bulldozer dozer device mostly with fixed soil knife blade angle majority can be adjusted to control the depth of soil shovel knife easy job, usually in the back of the site is also fitted dozer limited slip deep dish, so dozer can control certain soil depth cut jobs, prevent soil cut too deep causing overload or stall.

  2. Rotary

  Rotary cut soil bulldozing eradicate angle can be adjusted, but also rotation angle in the horizontal and vertical directions, for lateral transverse slope bulldozing and bulldozing. Its main feature is that in the ravines, complex terrain depression sudden ups and downs still has good adaptability, but not too small rotation angle (horizontal rotation angle greater than 25 ° a 30 °, vertical rotation angle should not be less than 10 °, otherwise, would not achieve the thrusters and transverse push effect adjustment mechanism is more complex due to the rotation, ramp operations, is inclined blade, blade withstand lateral pressure in Incline when large, easy to swing and cause locomotive deviation. To continue to pull to manipulate the joystick manipulation more difficult. At present, the project uses more rotary bulldozer dozer device, while still stationary agricultural bulldozer bulldozer majority.

Bulldozer frame by welding tank and rear axle group formed legs, two different production processes, in order to avoid damage to the film set of welding, to take on the rack after the group carried out the bottom one to the finish of the paint, film effect, more than 85% gloss, adhesion to a meet quality requirements appearance.

Bulldozer trolley is finish the most difficult part of the implementation, because the trolley welding, paint after painting the bottom one processing step there, take in the processing of rubber underside shop, take a non-clamping position outside appearances, processing is completed After cleaning cutting fluid increases, up painting process to ensure that car appearance. Currently assembled components to achieve the finish of 30 bulldozers, painting, assembling efficiency increases, inventory enhanced corrosion resistance, the whole appearance quality dramatically.

In recent years, the overall level of domestic bulldozers have been greatly improved in appearance, noise control, mechatronics applications, powertrain optimization, application and overall comfort, reliability, and hydraulic control system of the new technology and other aspects of foreign advanced level there is a large gap.

  (L) Product Reliability

  China's construction machinery Mean time between failures (MTBF} by the 1980s to the current nearly 100h 300h, crawler bulldozer MTBF of 470h,, up to 1000h, most of the foreign construction machinery in more than 1000 h maximum of 2000h foreign crawler dozer models 147 k} V below the average life of 10000 h, 147k} V models over the average life of 2}. (x 0}, the same type of products the average life less than its l / 2oo. Therefore, reliability is the most important issue of the industry.

  (2) the level of technical performance

  Domestic bulldozer on handling, comfort, energy efficiency, noise, pollution, construction quality and productivity and other indicators have lagged behind the world advanced level, in many advanced technologies, structures, materials and technology there is a big gap, inadequate control technology mainly in microelectronics applications, hydrostatic transmission technology applications and electro-hydraulic servo control technology applications for further study and improvement of automatic leveling technology is based on C Xing global positioning systems, laser, ultrasound and other precision auto-leveling technology push Application of soil technology needs further promotion and application.