Hydraulic cylinder It is a hydraulic actuator that converts hydraulic energy into mechanical energy for linear reciprocating motion (or swing motion). Its structure is simple and its work is reliable. When it is used to realize reciprocating movement, the reducer can be avoided, and there is no transmission clearance, and the movement is stable, so it is widely used in various mechanical hydraulic systems. Output force of the hydraulic cylinder is proportional to effective area of the piston and pressure difference on both sides; The hydraulic cylinder is basically composed of cylinder barrel and head, piston and piston rod, sealing device, buffer device and exhaust device. The buffer device and exhaust device depend on the specific application, and other devices are indispensable.

However, the noise of hydraulic oil cylinder often makes many users feel very headache. Today, I will analyze and summarize the causes of noise and the solutions.

1. The filter of the hydraulic cylinder is blocked by dirt and cannot filter oil

Solution: Use clean cleaning oil to remove dirt from the filter.

2. The oil level is insufficient, the oil suction position is too high, and the oil suction pipe is exposed

Solution: Add oil to the oil level and lower the oil suction position.

3. There is no paper pad on both sides of the pump body and pump cover; The pump body and pump cover are not sealed vertically; Inhale air while rotating.

Solution: add a paper pad between the pump body and the pump cover; The pump body shall be grinded on the flat plate with emery to make the perpendicularity error between the pump body and the pump cover not exceed 0.005mm. The connection between the pump body and the pump cover shall be fastened without leakage.

4. The driving shaft of the hydraulic cylinder is not concentric with the motor coupling, and there is twisting friction

Solution: adjust the concentricity of the pump and motor coupling so that the error does not exceed 0.2mm.

5. The meshing accuracy of the hydraulic pump gear is not enough.

Solution: The lapping gear reaches the gear meshing accuracy.

6. The oil seal framework of the hydraulic cylinder shaft falls off, and the pump body is not sealed

Solution: Replace the qualified pump shaft oil seal.