Time:2023-04-14 08:56:05 Browse: 120
1. If the oil in the hydraulic system is too dirty, impurities will accumulate and adhere to the pipe wall of the hydraulic system, thus reducing the flow area and slowing down the speed of the actuator, the flow will be cut off after being blocked. If impurities or pollutants are washed away, the flow will suddenly increase.
2. When the oil passes through the throttling gap, pressure loss will occur, resulting in local increase of the oil temperature of the 400-ton hydraulic press, Oxidative deterioration of the oil, rubber, asphalt or carbon slag and other sundries are separated at the throttle position and attached to the throttle wall to reduce the circulation area and even block effective fluid channels in serious cases.
3. Due to the vibration of the 400-ton hydraulic press or other reasons, after adjusting and locking the throttle valve, the locking bolt will become loose and the adjusting rod on the support sleeve will become loose, thus changing the opening of the throttle valve and causing the flow change.
4. The valve core of throttle valve adopts clearance seal, which will cause a certain amount of leakage. Due to abrasion, the leakage will also increase with the increase of clearance, especially when the flow is small, which will directly affect the stability of flow.
5. If the temperature of the oil is too high, the viscosity of the oil will decrease and the flow rate of the oil will be unstable.
6. The speed of throttle valve load suddenly changes, resulting in abnormal flow of axle press machine system. You can check the functions of hydraulic system pressure, decompression device and other components, as well as whether the control of overflow valve is normal, and repair it.
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