associated with high, wide range of employment

Bulldozer industry is an important pillar of our national economy, Hydrostatic dozer strategic industry and macroeconomic environment which has very close ties, industry chain length, associated with high, wide range of employment, consumer-driven big, bulldozer and dozer parts as a whole vehicle Bulldozer core part of the industrial chain, has been pulling the bulldozer hydraulic cylinder industrial development "two carriages

which requires consideration of the machine's traction and reasonable trade-off

The machine power grade of choice, Hydrostatic truck Bulldozer but also considering the engineering properties of soil conditions and machinery operations and other factors, such as the machine in with sand, rock-based soil environment construction, the general should choose 162kw (220 hp) or more of bulldozers; if bulldozer In addition to shoveling job, but also frequently pull operation, Tractor bulldozer which requires consideration of the machine's traction and reasonable trade-off.

bulldozer working in wet conditions and the like

High driven bulldozers use can be divided into general-purpose and special type two. Universal is the standard production models, widely used in earthwork. Special type for a particular condition, there is a wide triangular track board to reduce ground pressure bulldozer wetlands and marshes bulldozers, amphibious bulldozers, underwater bulldozer, bulldozer cabin, unmanned bulldozers,swamp hydrostatic dozer high altitude and high- bulldozer working in wet conditions and the like

Mechanical Track bulldozer

Mechanically driven bulldozer Categories by the walk way, bulldozers can be divided into two kinds of crawler and tires. Crawler excavators adhesion traction, ground pressure is smaller than (0.04 ~ 0.13MPa), climbing ability, but low speed. Wheel bulldozers with high-speed, flexible, short cycle times, convenient transportation transfer, but traction, Mechanical Track bulldozer suitable for the site and the need to constantly changing circumstances fieldwork.

This is the third stage of the motorcycle - maturity.

After the 20th century, after 30 years,construction earthmover with the continuous progress of science and technology, 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, widely used in transportation, drive bulldozers competition and military aspects. This is the third stage of the motorcycle - maturity.

dozer made in china

Mechanism drive Bulldozers The joint foot brake pedal is a unique design bulldozers, both sides turned to each brake, but also at the same time with only one foot on either side of the steering brake clutch. With piston-type servo valve so that the disengagement and brake for dozer made in china the steering clutch mechanism reasonably compact, and easy maintenance.

the operating efficiency of these machines

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 MYW Bulldozer the operating efficiency of these machines

high driven bulldozer

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., high driven bulldozer can also be done short distance transport of bulk material shovel and stacking operations.

ports and irrigation and water conservancy construction projects.

Mechanical Drive Crawler Bulldozer 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.

Track Dozer

but the pursuit of speed and load between adaptation coordination (to achieve this capability depends primarily on the performance of the travel control system), Track Dozer the purpose is to make full use of engine power, improve operational productivity, reduce specific fuel consumption, the pursuit of power, economy, job productivity. Thus for this type of traction bulldozer machinery, the travel drive system and with control system performance are important factors exert influence bulldozer operating performance, drive bulldozers determine the level of work productivity, we can see on the bulldozer with the drive system and with the control system Research is very necessary and important.

Research bulldozer driving system in and running control system

Mechanical Bulldozer Supplier Since the bulldozer during operation, the operating system is basically in a passive state, traction need to travel agencies promoting the work down, so it is called mechanical traction. Mechanical Transmission dozer towing vehicle traction drive system all bear a load working device, which is a dramatic change, fluctuation The non-stationary random load; mechanically driven bulldozer towing vehicles generally no job quality requirements, and therefore does not require the stability of the work,

Expand the development of high driven bulldozers species, 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 use the service to bring pole great convenience.
Chinese Crawler Dozers 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.

Bulldozer main clutch failure causes

mechanical Highlands dozers in the project operation, due to improper use of some accessories easily damaged bulldozer, bulldozer is one of the main clutch parts easily damaged, let's take a look at if there is a fault should be handled?
Effect of the plate spring Three leaf spring uniformly riveting on the rear plate clutch, whose role is to separate the clutch, so that by the elastic force of the leaf spring to produce the rear plate separation gap. If the rivets loose leaf springs or leaf spring fatigue itself, hydraulic drive system bulldozers will make it stretch reduced, thus affecting the generation gap between the clutch, causing the clutch is not complete. In addition, when the inner tooth after tooth disc hub tight or rust, etc., will also affect the separation plate, causing the clutch is not complete.

Effect of corrosion

If bulldozer parked time in a humid environment for too long, active plate clutch with its inner sleeve easily rust, due to corrosion products (iron oxide) has expanded features, active plate surface rust at both ends of the separation gap clutch reduce or even disappear, Bulldozer with Universal Blade cause clutch is not complete. Active plate bearing corrosion, makes engine power without friction plate and driven directly to the clutch shaft, the clutch can not cut off the power. In addition, due to lack of active plate bearing lubricant and severe erosion, which results to the same as above. Driven disc after disc element if its set of teeth hub rust, then when the clutch is disengaged, cheap track dozer the axial slip resistance will be great and can not produce the separation gap, resulting in clutch is not complete.

power shift hydraulic dozer

When refitted filter, twist the tank switch 3-5 laps and found a small amount of fuel filter inlet pipe outflow, power shift hydraulic dozer but soon the fuel that is shed. After careful observation and repeated comparisons, and finally found the switch does not turn on the fuel tank. The switch is a spherical structure, rotate 90 ° when the oil is turned on, then rotate 90 °, to cut off the oil. The ball did not handle the switch, there is no limit device, only revealing Quartet iron, chinese dozer supplier driver mistakenly switch as a throttle valve switch use, turn the 3-5 laps to enable the ball back to the closed position. Ball rotation process, although a small amount of fuel into the oil, but only the car 1 min, when the line of fuel burned, the machine that is stalling.

Bulldozers winch spill

Rope winch oil leakage phenomenon at a GJT112 bulldozer appeared in construction. Pull the rope was found after all, the hydraulic oil is leaking from the winch at the seat bolts, and when stepped on the gas leak quickly, almost no oil leakage at idle.Preliminary analysis may be caused by loose bolts or gasket is damaged, but after replacing the gasket and tighten the bolt test machine, the fault persists. Further analysis of the hydraulic schematic view, 80Hp small swamp dozer may be due to poor oil return, resulting in greater backpressure. So the return pipe winch to manipulate the valve replaced, and that the inside of the tank by welding the parts back to the oil on a short tube, put the machine back to the original than some thick hose pipe, so that the end is not connected to the return line control valve, and directly connected to the new oil return spool, to reduce the oil return back pressure. Again the test machine, Chinese Earthmover the fault disappears

Dozers maintain an appropriate degree of tension

If the tension is excessive, the guide wheel spring tension acting on the track pin and pin sleeve, pin and pin sleeve outer circle has been subjected to high compressive stress, during operation of pins and bushings produce premature wear, while the guide pulley tensioner spring will also act on the guide shaft and sleeve, with great surface contact stress, which makes the guide wheel set easily ground into a semicircle, swamp crawler bulldozer with blade steadily from easy stretch, and will reduce the mechanical transmission efficiency, waste engine passed wheels and track power.
If the tension is too loose mechanically driven bulldozer, tracked easily from the guide wheels and rollers, and lose track of the correct, so fluctuations in running track, beat, impact, causing abnormal wear of the guide wheel and the idler.

swamp hydraulic crawler dozer

China mechanical Bulldozer generally applicable to strong seasonal, concentrated quantities, poor construction conditions construction environment, the main job for a short distance of 50-100 meters, such as base construction, excavation, land leveling, clearing roots, push set Gravel, etc., and the scraper and crowding mechanical tillage and help shovel and haul various towed working device and other operations.
Dozers is the most widely used as a swamp hydraulic crawler dozer, it is suitable for the following four soil auger when the auger four and four above the soil or permafrost, you must first loosen the soil, common practices straight shovel side shovel, oblique shovel, tillage operations, such as the split.

mechanical Swamp Bulldozer

small crawler bulldozer Adjust the tension of the track, through the injection nozzle to the tensioning cylinder filling butter or butter discharged from the discharge nozzle, the reference standard gap between each model adjusted. When the track steadily stretched to need to be removed from a group of track section, the drive tooth surface and pin sleeve engaging surface will also be abnormal wear, mechanical Swamp Bulldozer it should engage the deterioration in the situation before appropriate treatment, such as the pin and the pin set upside down, replace worn over the pin and pin sets, the replacement of track joint assembly and the like.

bulldozer manufacturers

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.

Mechanism drive Bulldozers

MYW Bulldozer steering brake is wet, belt wrapped, foot operated with hydraulic assistance and stop braking device. Hydraulic assistance steering mechanism is safe, reliable, flexible labor-saving features. After pulling the lever, the steering clutch can transfer from separation to braking gradually, which avoids unusual wear.
Mechanism drive Bulldozers The joint foot brake pedal is a unique design bulldozers, both sides turned to each brake, but also at the same time with only one foot on either side of the steering brake clutch. With piston-type servo valve so that the disengagement and brake for the steering clutch mechanism reasonably compact, and easy maintenance.

crawler tractor dozer

Bulldozer dozer blade means abbreviation is crawler tractor dozer The main working device, mounted on the front, install the form of a fixed slewing bulldozer two.
Use a stationary blade of a bulldozer, which blade is on the way forward installation, called a straight spade or shovel, used in, small dozer. Rotary blade rotatably in a horizontal plane at an angle installation to achieve unloading shovel, general maximum rotational angle of 25 °; can also tilt the blade at an angle in the vertical plane in order to achieve lateral shovel, roll angle is generally 0 ° ~ 9 °, shown in Figure 1-6. Rotary blade to 0 ° rotation angle of installation, can achieve the same straight shovel. Thus, the rotary blade adapted to a wider range of jobs, large and medium-sized bulldozer install more rotary blade.

largest bulldozer

With the development of the national economy, large-scale mining,chinese dozer water conservancy, power plants and transportation sector demand for medium and large track-type tractors is increasing, although our medium and large track-type tractor manufacturing larger development, but can not meet the national economic development It needs. To this end, since 1979, China has from Japan's Komatsu and Caterpillar crawler bulldozer introduced the production technology, largest bulldozer process specifications, technical standards and material system, digestion and absorption through research and key technologies

Hydraulic driven system

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; but poor organization running smoothly, the energy losses. Closed system hydraulic oil in the hydraulic system in a closed loop, compact, 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.

hydraulic crawler dozer

In order to form the current , 1980s and 1990s Komatsu technology products as the leading pattern. From the 1960s to now, the domestic tractor industry, hydraulic crawler dozer the company has been stable at around 4, because bulldozer product processing requirements, difficult, production requires a large investment Mechanical Crawler bulldozer is generally not easily get involved in business. But with the development of the market, from the "eight five" start, a number of domestic and medium-sized enterprises according to their own strength, cheap crawler dozer began to run, such as Inner Mongolia First Machinery Factory, Xuzhou loader factory,other.

Bulldozers and loaders

hydrostatically driven wheel loader is a widely used earthwork construction machinery highways, railways, construction, utilities, ports, mines and other construction projects, it is mainly used for loading shovel of soil, sand, lime, coal and other bulk materials。Bulldozer with Universal Blade is one kind by a tractor driven machine, there is a broad and blunt horizontal shoveling to clear the land, road structure or similar work

Historical bulldozer

Mentioned roller had compacted the development of technology to make a brief introduction, as early as in ancient times people had used a herd of hooves trampling feet of soil, kneading and tamping handle house foundation, compacted dam and embankments, in the mid-19th century,Mechanical Bulldozer Supplier the western road projects to pave the way for the main gravel compaction vehicle mainly by natural rolling until after the 1858 invention of the Rolling Stone, and promote the development of gravel road, only the gradual emergence of compaction work with the horse-drawn roller.

Bulldozers are now useless

Vibratory roller compactor installed in the hydrostatic exciter made heavy use of machines and exciting force compaction operations. A single wheel, wheel, tire, dual vibration, modular and so on. Eccentric shaft vibration exciter is mounted on the grinding, mechanical or hydraulic transmission,Mechanical Bulldozer Supplier equipped with anti-vibration measures and the suspension mechanism between the vibrating wheel and the frame. Some tire roller also features adjustable frequency vibration exciter. Basic technical parameters of the machine heavy vibratory roller, exciting force and bus pressure (static line pressure and the pressure of moving lines and). Weight ranges from 1.5 to 18 tons, a wide range of applications for a variety of compaction, compaction large thickness, effective and high productivity.

Mechanical transmission bulldozer advantage

Mechanical transmission design and manufacturing bulldozers have easy, reliable, high transmission efficiency, easy maintenance, etc.,Mechanical Transmission Bulldozer but the operation is laborious, poor use of the load, the working efficiency of bulldozers affected. Currently only a small bulldozer mechanical transmission.

swamp hydrostatic dozer

swamp hydrostatic dozer hydraulic torque converter is to rely on the work. Fluid flow in the Cascades, due to impact, friction, consumes energy, heat the oil, so torque converter transmission efficiency is relatively low. The best domestic and its maximum torque converter efficiency of 88%. When the torque converter turbine due to overload and stop turning bulldozers, wheel coming from the pump all the energy is converted into heat and consumed, when the torque converter efficiency is zero. To swamp hydrostatic dozer improve transmission efficiency torque converter, it is necessary to grasp the bulldozer load, the turbine proper speed, bulldozers have the right speed; that is, when the bulldozer because the load is too large to walk, to promptly reduce load, mention blade or by the change of gear I II block.
The structure and working principle converter known within the oil will leak when the converter operation, it will generate heat. This requires a timely manner to internal converter add oil, heating oil and replace it cools, forming a loop.

Mechanical transmission bulldozer performance

Development of hydraulic integration. Overall technological level of domestic bulldozer Although there are greatly improved, but the technology has developed rapidly in recent years, world, electronic technology used bulldozers began to realize the hydraulic integration. For example,Mechanical Transmission Bulldozer the engine uses an electronic governor, limit load control system and fuel injection systems, capable of operating in accordance with bulldozers, the engine operating conditions, to automatically adjust the engine performance, improve their adaptability; automatic control of blade adjustment leveling system, improve the work quality and productivity. Mechanical and electrical integration is one of the domestic bulldozer development.

Mechanical transmission bulldozer design inspiration

Mechanical Transmission dozer low center of gravity-driven system designed for walking, long length of track on ground and seven rollers provides unmatched gradeability and outstanding balance and stability, and therefore more suitable for the slopes for the continuity of dozing and finishing operations slope obtained root high productivity and balance.

Bulldozer history

Machinery bulldozers suppliers,track bulldozer suppliers manufacturer is successfully developed by the Americans Benjamin Holt in 1904, which is formed at the front crawler tractor dozer device installed to enhance the human, then the power steam engine, and later successfully developed from natural gas and gasoline powered drive track-type tractors, earth Blade also enhance the development of rope from a manpower increase.

machinery crawler Dozers maintenance

MYW Mechanical Crawler Dozers semi-rigid suspension, mechanical transmission, hydraulic pilot control of crawler tractors. State II emissions on diesel with the supercharged engine, big power, energy saving; wet main clutch, mechanical shift transmission, easy routine maintenance.

Hydraulic crawler dozer system

MYW hydraulic crawler dozer,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.

Heavy bulldozer main clutch lever

Main reasons: Mechanical Transmission Bulldozer filter clogging, lack of supply, so that the booster does not work; the main clutch hydraulic system in oil; booster booster valve damage or problems; double metal sleeve jacket burning mobile. When the clutch lever heavy fault, you should first check the oil level of the hydraulic system meets the requirements; if the oil level is appropriate, temporarily remove the oil filter, then the main clutch lever pulled 160hp hydraulic crawler bulldozer, if they feel the joystick becomes King , then the filter is clogged, only this time to clean or replace the filter. If the oil is normal, but the main clutch lever heavy, you can check and force safety valve is not jammed or drain, if the booster valve is no problem, you have to check the booster; or check the movement bimetal sleeve jacket It is burning, necessary to be replaced.

Mechanical transmission bulldozer Transmission

Mechanical Transmission dozertransmission system mainly composed of hydraulic pumps and motors, and therefore gear light weight, small size, easy vehicle The overall layout. And depending on the combination of pump and motor, you can get different mechanical traction characteristics; can easily achieve variable speed and jog with the vehicle, the vehicle soft start, and can quickly shift and change with no impact Mechanical Bulldozer Supplier , the engine at low speed with good load characteristics, namely low engine speeds when the vehicle can also play the greatest traction, this; direction such as bulldozers for mechanical traction is particularly important;

 it easy to mechanical, hydraulic, electronic sets in one, automatic control, and this is the basis for intelligent machine; easy operation and effort, can be completed with a joystick forward vehicle Back and steering. Hydraulic drive a vehicle around easily track independently driven, power steering and place can be turned, which makes the vehicle can adapt to the needs of various jobs.

On the status of the bulldozer industry products

Mechanical Crawler Dozers industry after decades of development, through the build, copy, after the introduction of digestion stage, achieved great progress, because of foreign technology only to stay in the digestion and absorption and enhance the localization rate of a low level, did not rise to the products of independent research and development and technological innovation capability height, the gap narrowed but still evident.

Mechanical Bulldozer Supplier in the machine design, modular design, the use of hydraulic pilot technology, electronic technology application so that machine maintenance, handling, comfort, etc. has been greatly improved. However, due to the lack of independent research and development capacity and quality control system inadequate, resulting bulldozer industry and foreign enterprises still have a big gap.

Development of Bulldozer

Mechanical Crawler Dozers by the Americans Benjamin Holt successfully developed in 1904, it was installed in front of human promotion crawler tractors earth-moving equipment to form, when the driving force is the steam engine, and later successfully developed from natural gas powered and gasoline-driven crawler dozer, dozer blade also enhance the development of rope from a manpower increase. It is also one of the founders Benjamin Holt Caterpillar (Caterpillar Inc.) Company, 1925 Holt Manufacturing Company and C.LBest Tractor Co. merged to form Caterpillar Tractor Co. to become the world's first Mechanical Bulldozer Supplier The manufacturer, and in 1931 the first batch of successful downline 60 bulldozer diesel engines.

As technology advances, the current high driven bulldozers power has been used in all diesel engines, dozer blade and ripper all lift by the hydraulic cylinder. In addition to crawler tractors bulldozers, there are tire-type tractors, it appears a decade later than the crawler tractor around. Since the track-type tractor has good adhesion properties, it can play a greater traction, so at home and abroad, the variety and quantity of their products far exceeds tire bulldozer. Internationally, Caterpillar is the world's largest construction machinery manufacturing company, the production of crawler tractors are large, medium and small total of nine series D3-D11, the largest D11RCD, diesel engine flywheel power of 634kw.

Bulldozer right steering clutch inseparable Troubleshooting

Left turn when the hydrostatically driven crawler tractor is working properly, then turn right and sometimes not normal when normal; brake (in place of a steering rod pull brake linkage), the engine black smoke, variable sound; when to be machine repair, right steering clutch is not completely separated .

Failure Analysis and Troubleshooting: According to the above symptoms, according to the principles of the easier issues first, check the brake on the right, left-right axis hydraulic transmission fluid amount, joystick clearance adjustment, the main valve and turning the steering valve, the results were normal. Then again steering system for leaks, oil spills were examined, about the upcoming brake cover small cap were open, and then squatting ripper shelves were observed walking; when the results of the pull rod right turn, brake cover Big oil has obvious sound. Open central transmission cover, respectively, shaking hands left and right S tube (steering clutch inlet pipe), the feeling on both sides of the gap S activity is almost the same tube, and then were pulled left and right steering rod, see the left and right steering system not to return to the oil central transmission housing difference, so you can exclude leak, spill situation pipeline system exists. To further clarify the source of the sound of Big Oil and steering clutch work, has removed the diesel tank, right brake cover, brake wheel cylinders, brake inlet pipe to the right port on the cabinets (try to prevent oil outflow) , start engine, found from the junction with the central bearing disk drive connected to the oil when you pull out a large number of State and right steering rod. At this point, we make the following judgment on the cause of the malfunction: here is due to the sealing ring is damaged, causing hydraulic oil through the S tube into the right bearing.

However, when hanging under the cab, carried out the right steering clutch, pull the connecting plate and found two sealing ring is not damaged, and the bearing and the central rotating disk bearings are also not damaged, we had to make the right turn clutch assembly Decomposition check, only to find that there are two large springs have been broken, but no damage to the piston and the groove. Replacing the two large springs (symmetrical use), after the piston rings and seal rings, the right steering member refitted test machine, results when releasing the brake, barely able to separate right turn, only slightly better than the previous repair, but still does not work, indicating that the main reason for the failure persists. Identified based on the principle of exclusion, the problem only lies in the steering control valve inside the. Thus, the steering control valve fully decomposed, inspection, and finally found the right reel in the decomposition, loose thread on the pump, causing the spring pressure is reduced. After the re-adjustment of the spring pressure, refitted steering valve test machine again, the fault has been rectified.