Analysis of the common problems of the hydraulic system of the four-column Hydraulic Press and their solutions.
Due to the difference in the flow rate of the force transmission medium (hydraulic oil) in the flow process, there is a certain internal friction inside the liquid, and there is also friction between the liquid and the inner wall of the pipeline, which all cause the temperature of the hydraulic oil to rise reason. An increase in temperature will increase internal and external leakage and reduce its mechanical efficiency. At the same time, due to the higher temperature, the hydraulic oil will expand, resulting in increased compressibility, and the control action cannot be transmitted well.
Solution: Heat is an inherent feature of the hydraulic system of a hydraulic press, and it cannot be eradicated and can only be reduced as much as possible. Use good quality hydraulic oil, avoid elbows in the layout of hydraulic pipelines, use high-quality pipelines, pipe joints, hydraulic valves, etc.
The leakage of the hydraulic system of the hydraulic press is divided into internal leakage and external leakage. Internal leakage refers to the leakage process that occurs inside the system, such as the leakage on both sides of the hydraulic cylinder piston, the leakage between the control valve spool and the valve body, etc. Although internal leakage will not cause loss of hydraulic oil, due to leakage, the established control action may be affected until it causes system failure. External leakage refers to the leakage that occurs between the system and the external environment. If hydraulic oil leaks directly into the environment, it will not only affect the working environment of the system, but also cause failures due to insufficient system pressure. The hydraulic oil that leaks into the environment also poses a fire hazard.
Solution: Use better quality seals to improve the processing accuracy of the equipment. The detailed solution can be found in the control method of the hydraulic system leakage of the four-column hydraulic press
The vibration of the hydraulic system is also one of its persistent problems. The shock caused by the high-speed flow of hydraulic oil in the pipeline and the shock caused by the opening and closing of the control valve are the reasons for the vibration of the system. Strong vibration can cause errors in system control actions, as well as errors in some of the more sophisticated instruments in the system, leading to system failures.
Solution: The hydraulic pipeline should be fixed as far as possible to avoid sharp bends. Avoid frequently changing the direction of the liquid flow, and damping measures should be taken when it is unavoidable. The entire hydraulic system should have good vibration damping measures, and at the same time, avoid the impact of external vibration sources on the system.
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