The leakage of the hydraulic system will cause a reduction in hydraulic volume and cannot establish normal pressure, which will cause the system to not work properly. There are two main cases of leakage of the hydraulic system: external leakage and internal leakage. This article mainly introduces the two main leaks of the leakage failure of the hydraulic system and the main measures for leak -proof and leakage.
1. The SAE flange must have sufficient strength and must not be deformed when tightening. 2. The flange sealing surface should be cleaned up, and oil stains and rust must be carefully cleaned up when installing the SAE flange. 3. The gasket needs good oil resistance, heat resistance and aging resistance, as well as good elasticity and mechanical strength.
The main cause of hydraulic impact is the rapid change of the fluid flow, the inertia of the high -speed motion work component, and the reaction action of certain hydraulic components are not sensitive.
When a hydraulic impact is generated, the pressure in the system is several times greater than normal pressure, especially when the pressure is high and the flow is high, it is easy to cause the system's vibration, noise, and even the damage of some hydraulic components. Affecting the quality of the system will shorten its service life. It should also be noted that the high pressure generated by the impact of pressure may cause misunderstanding of certain hydraulic components (such as pressure relays) and damage the device.
(1) The cause of noise in the hydraulic pump ① The flow pulse and pressure pulse of the pump causes the vibration of the pump component.
In the case of loading, due to the high sound sound of the pump itself, check whether the hydraulic pump should be performed under vacuum. The inspection method is to start the pump under the empty load, open the overflow valve, so that all traffic will return to the fuel tank directly. If there is no steam erosion, there is no sound of the pump at this time. If a steam erosion occurs, the pump will emit a sound of bearing loose.
