¿Cuál es la función del colector de distribución hidráulica?

The function of the hydraulic distribution manifold is to change the flow direction of the hydraulic oil to control the lifting and lowering of the movable arm cylinder and the upturning and downturning of the bucket cylinder.

The hydraulic pump sends the pumped high pressure oil to the hydraulic distribution manifold to perform the required action.

I. Introduction of the hydraulic distribution manifold.

1. The hydraulic distribution manifold is fixed on the front axle in the direction of the following figure, and the red circle is the valve stem controlling the bucket cylinder, when the lever is pushed forward, the valve stem extends and executes the bucket down-turning action. When the lever is pushed backward, the valve stem is indented to perform the up-turning action of the bucket.

The control lever of the bucket cylinder, it has three positions upturn, hold, downturn. The end cap is equipped with a return spring, releasing the lever it automatically maintains the executed action. The black circle is the valve stem controlling the movable arm cylinder, which has four positions: lifting, holding, lowering and floating. There is a positioning sleeve inside the end cap, which relies on a steel ball to position it. It does not hold automatically, but needs to be manually operated to keep the arm as high as it can go and how much it can go down. When the lever is pushed forward, the valve stem extends to execute the lowering action of the arm. Push the lever back and the valve stem retracts to lift the arm. To hold how high and lower, manually return the stem to the held position.

Introduction of the hydraulic distribution manifold.

2. The green circle is the oil inlet (front chamber) of the small chamber with rod to execute the upturning action of the bucket, the blue circle is the oil inlet (rear chamber) of the large chamber without rod to execute the downturning action of the bucket, and the purple circle is the oil return port.

When the pressure oil enters the front chamber, the piston moves backward, the bucket turns over, and the hydraulic oil in the cylinder barrel of the back chamber returns to the oil tank. When the pressure oil enters the rear chamber, the piston moves forward, the bucket turns down, and the hydraulic oil in the cylinder barrel of the front chamber returns to the oil tank. Dark blue is the main safety valve, regulating the size of the hydraulic oil pressure.During operation, if the pressure exceeds the set limit, it releases the pressure to allow the hydraulic oil to return to the tank.

The green circle is the oil inlet (front chamber) of the small chamber with rod to execute the upturning action of the bucket, the blue circle is the oil inlet (rear chamber) of the large chamber without rod to execute the downturning action of the bucket, and the purple circle is the oil return port.

3. The light blue circle is the inlet of pressure oil, the high pressure oil hit by the hydraulic pump is fed from here. The light green circle represents the overload valve replenishment valve of the front chamber of the dump cylinder, and the gray circle represents the overload replenishment valve of the rear chamber, also known as the double-action safety valve. The big port connects to the front, rear, and back chambers of the cylinder, while the small port connects to the oil return channel.

When tilting the bucket upward, pressure oil enters the front chamber, maintaining this action while the front and back chambers remain closed, thereby retaining hydraulic oil within the cylinder.When you go to maneuver the moving arm to lift or lower, the pressure in the front chamber or the rear chamber of the bucket cylinder will become bigger, and it will drain the oil at this time. When the pressure in the front chamber becomes large, the front chamber overload replenishment valve it will drain the oil, reduce the pressure. Because it is a closed state, the oil drain, the rear chamber will be short of oil. At this time, the rear cavity safety valve will open to the rear cavity to replenish the hydraulic oil, which plays the role of oil and replenishment.

The light blue circle is the inlet of pressure oil, the high pressure oil hit by the hydraulic pump is fed from here. The light green circle represents the overload valve replenishment valve of the front chamber of the dump cylinder, and the gray circle represents the overload replenishment valve of the rear chamber, also known as the double-action safety valve. The big port connects to the front, rear, and back chambers of the cylinder, while the small port connects to the oil return channel.

4. The red triangle is the oil inlet of the front chamber of the movable arm (with rod), executing the lowering action of the movable arm. The purple square is the oil inlet of the rear chamber of the movable arm (without rod), which executes the lifting action of the movable arm.

The red triangle is the oil inlet of the front chamber of the movable arm (with rod), executing the lowering action of the movable arm. The purple square is the oil inlet of the rear chamber of the movable arm (without rod), which executes the lifting action of the movable arm.

5. The working principle of the hydraulic distribution manifold. The engine flywheel rotation drives the torque converter’s elastic plate, which connects to the cover wheel. Splines connect the cover wheel and pump wheel, and the rotation of these splines drives the pump shaft gear, initiating the operation of the hydraulic pump.

The working principle of the hydraulic distribution manifold. The engine flywheel rotation drives the torque converter's elastic plate, which connects to the cover wheel. Splines connect the cover wheel and pump wheel, and the rotation of these splines drives the pump shaft gear, initiating the operation of the hydraulic pump.

II. Hydraulic distribution manifold disassembly

1. Safety valve

Safety valve

Safety valve

Safety valve

Safety valve

2. Diverter valve stem

Diverter valve stem
Diverter valve stem
Diverter valve stem

3. Pneumatic arm valve stem

Pneumatic arm valve stem

4. Double acting safety valve

Double acting safety valve

Double acting safety valve

summarize

When the hydraulic system of the loader fails, it is around the hydraulic pump, hydraulic distribution manifold, and cylinder to check. Specific judgment is where the failure, according to the actual situation to see. Typically, technicians check the safety valve on the hydraulic distribution manifold first, as it often jams. When servicing the hydraulic distribution manifold, ensure to prioritize safety and place the movable arm flat on the ground.

 

Of course, Zhuo Yi Control Technology Co., Ltd. can customize your hydraulic distribution manifold according to your ideas, you can Contacto for support!

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