Hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and does linear reciprocating movement (or swinging movement). It is simple in structure and reliable in operation. When it is used to achieve reciprocating movement, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth, so it is widely used in various mechanical hydraulic systems. However, when the hydraulic cylinder leaks, many users do not know whether it is internal leakage or external leakage. Next, the small edition of Broadcom hydraulic will give you a detailed explanation.
Hydraulic cylinder leakage can be divided into two types, one is external leakage, the other is internal leakage.
External leakage mainly refers to the leakage of hydraulic oil from the system to the environment, internal leakage refers to the existence of the pressure difference on the high and low pressure side and the loss of seals and other reasons, so that the hydraulic oil in the cylinder system from the high pressure side to the low pressure side, internal leakage and external leakage may lead to the loss of hydraulic cylinder.
A leak in a pressure line can be easily detected because the leaking hydraulic oil can be seen. Maintenance personnel and operators should often check every component of the entire hydraulic system, find leaks in time and immediately address leakage problems. However, the external leakage occurs in the pump suction port is difficult to detect, if the following five phenomena occur, you can suspect that the system suction pipe leakage.
Hydraulic cylinder maintenance
(1) There are air bubbles in hydraulic oil;
(2) The hydraulic system is unstable and crawling;
(3) overheating of the hydraulic system;
(4) Increased tank pressure;
(5) Pump noise increases.
If any of the above phenomena exist, all suction tubing joints and connections should be inspected first to look for leaks. For the hose joint do not over-tighten, because excessive tightening will deform the joint, but will increase leakage, should use the equipment manufacturer's tightening torque value, which will ensure a reliable seal and will not cause the joint and seal ring distortion causing damage to the seal surface.
Digging oil cylinder maintenance
Due to the wear of the components in the hydraulic system, over time, the leakage generated inside the components will become more and more obvious, minor internal leakage may not be detected, but as the internal leakage increases, the system overheating will become a problem. When this happens, other components of the system will begin to lose. A simple way to identify internal leaks is to test the system's full and no-load operating cycles, if it takes a lot longer than the no-load time to complete the loaded operation, then you can suspect that the pump is lost.
Once the hydraulic components in the hydraulic system leak, it will not only cause the waste of media and environmental pollution, but more serious will cause the entire hydraulic system to fail, stop working, resulting in safety and quality accidents. In order to reduce the failure of the hydraulic system, improve the rate of the hydraulic system, prevent environmental pollution and reduce the loss of the hydraulic medium, it is necessary to pay attention to the leakage problem, and analyze the causes of leakage, and take corresponding measures to achieve the purpose of reducing leakage and even avoiding leakage.
Hydraulic cylinder is an executive element that converts hydraulic energy into mechanical energy in hydraulic system. The fault can be basically summarized as hydraulic cylinder misoperation, inability to push the load and piston slip or crawl. Due to the failure of the hydraulic cylinder, the phenomenon of equipment shutdown is not uncommon, so we should pay attention to the fault diagnosis and maintenance of the hydraulic cylinder.
