What type of steering cylinder does the ZL20 loader use

Analysis of the working principle of ZL20 loader Share documents.

2015-04-19 3 min.

A concise analysis of the working principle of a wheel loader.

The wheel loader is mainly composed of power system, transmission system, working device, working hydraulic system, steering hydraulic system, frame, operating system, braking system, electrical system, cab, covering parts, air conditioning system and so on. The following is a detailed introduction to the working principles of the first five systems.

First, the power system.

The power system of the loader is composed of the power source diesel engine and the auxiliary system to ensure the normal operation of the diesel engine, mainly including the diesel engine, fuel tank, throttle control assembly, cooling system, fuel pipeline, etc. The diesel engine completes the normal walking function through the double-variable drive transmission system; Drive the working device to complete the work actions such as shoveling, lifting, and tipping by driving the working hydraulic system; By driving the steering hydraulic system, the frame is deflected to complete the steering action.

Second, the transmission system.

The transmission system consists of a torque converter, gearbox, drive shaft, front and rear drive axles and wheels. By automatically adjusting the output torque and speed of the drivetrain, the loader can automatically change the speed and pull according to the road conditions and the amount of resistance to adapt to changing conditions. After the gear is engaged, it can automatically and infinitely change the speed between the start and the maximum speed of the gear, which has a smooth start and good acceleration performance.

In the event of a slope or sudden road obstacle, it can automatically slow down to increase traction and drive at any small speed to overcome obstacles without changing gears. When the external resistance is reduced, it can quickly and automatically increase the speed to improve the operation rate. When shoveling materials, it can cut into the pile at a large speed, and automatically decelerate as the resistance increases, improving the traction of the wheel edge to ensure the cut-in.

Fig.1 Schematic diagram of the transmission system.

The power output by the engine is transmitted to the gearbox through the torque converter, and the transmission through the gearbox drives the front and rear axles and wheels to rotate through the transmission shaft to achieve the function of walking at a certain speed.

3. Working device.

The working device of the loader is composed of four parts: bucket, boom, rocker arm and tie rod. The boom is a single-plate structure, the rear end is supported on the front frame, the front end is connected to the bucket, and the middle part is connected to the boom cylinder. When the boom cylinder is telescopic, the boom rotates around its rear pin shaft to lift or lower the bucket.

Z loader is the first letter in Chinese pinyin, representing the loader. The first letter of the l tire type, which stands for tire type.

ZL stands for Wheel Loader.

There are too many models of engine front and rear crankshaft oil seals, big arm oil cylinder oil seals, small arm oil cylinder oil seals, steering cylinder oil seals, differential front oil seals, wheel bearing oil seals, transmission oil seals, etc.

Xiagong except for 956 and 958, the rest should be the same.

This is not necessarily, you can take a look at it on the positive match**, maybe you can know the answer.

Huh

The question is more complicated

But I can tell you one thing: the steering cylinder is not actually a cylinder. It is a cylinder-like oil circuit block that can be rotated

There are 2 spring plates in the steering gear, when turning the steering wheel, the spring plates are pressed first, and then the rotary valve is driven to rotate and connect the corresponding oil circuit to reach the oil cylinder. When the spring blade is relaxed, the rotary valve is put back in place, that is, the oil passage is closed, so the oil does not flow to the cylinder.

Where are you? Figure has, in my knowledge.

Oh, in fact, you don't need to understand this problem, you said that the problem of the steering machine has been solved for you, what you are asking is the principle of the steering machine, I don't know how to explain it to you, look at the mesh leaf handle of Zhenjiang Hydraulic Parts Factory.

There are adjusting screws on the unloading valve that can be adjusted.

Which brand are you talking about? You can find it from the oil outlet pipe of the steering pump along the pipe, and the names of the pressure regulators are also different, some are called priority valves, relief valves, dismantling Minhukai safety valves, overload protection valves and other travel branches, but the functions are the same!

The big arm 16 turns, the bucket 14, the steering 12, the brake depends on the afterburner pump, some are 12, like Liugong and Lingong, some are 9 pressures, generally Longgong, Xiamen, and XCMG.

The pump used on each loader is different, and there are individual ones that can be used universally, and the following is one of them:

The working pump of Liugong ZL50C loader is CBG3160, the steering pump is CBG2080, and the variable speed pump is BB70A, and these three pumps are installed on the gearbox.

Manufacturers are not the same models, that is, the 50 loaders produced by the manufacturer are also divided into models, but the variable speed pump is generally BB70