Analysis of abnormal vibration of hydraulic cylinder

The hydraulic cylinder occasionally vibrates abnormally in the process of use. The reasons are analyzed as follows: the debate sound and vibration caused by sealing will cause excessive pressure on the construction surface, and the tension will cause mechanical contention sound. Find out the cause and park the car immediately. When the sliding surface fits too tightly, it becomes a bigger event. When this abnormal sound occurs, it will form a dry argument sound, or it may be scratched due to galling, otherwise it may cause the sintering of the sliding surface, the argument sound oil film of the sliding metal surface will be destroyed, and an abnormal sound with a "hissing" sound will often be emitted. The pressure oil in the oil pressure chamber will leak to the oil return chamber at a high speed through cracks, and the piston seal is loose. Because the cylinder wall is swollen, the internal leakage will also produce a no * sound.

In order to adjust the speed of the hydraulic cylinder, four one-way valves are received by Yu Yu, which makes it jump. When the manual reversing valve is in the middle position, the oil can flow through the speed regulating valve along the rival side. No matter where the piston flows, when the piston flows to the right, it is the waste speed regulation of oil return, and the fragmentary working pressure is set by the overflow valve. Realize bidirectional speed regulation of oil inlet and return. Try to diagnose and wipe it. The hydraulic cylinder cannot be accurately positioned and terminated, and the speed is regulated by the speed regulating valve. Therefore, the reciprocating speed of the piston is crucial. When the piston flows to the left, it is to feed oil and regulate speed thriftily. In detail, the speed regulating valve and four one-way valves are used. When the hydraulic control one-way valve is locked in detail, how can the hydraulic control one-way valve be * sealed *, and the regulating oil circuit of the hydraulic control one-way valve can not adhere to the pressure, playing a locking sense.

Therefore, when the valve is switched to the middle position, that is, there is still pressure in the containment oil circuit of the hydraulic control one-way valve. Therefore, from the middle position of the reversing valve to the flow, until the pressure oil in the discipline oil circuit is relieved due to the internal leakage of the reversing valve, there is a situation that the hydraulic cylinder cannot be in the right position.