Hydraulic system


The hydraulic system is a system that uses oil as the working medium, transmits energy through the pressure energy of the oil, and uses control valves and other components to drive the hydraulic actuator to work. A finished hydraulic system is mainly composed of power components, actuator elements, control elements, auxiliary components and working medium.

The common faults and solutions of the hydraulic system are as follows:

Common faults:

1. Hydraulic oil leakage: It may be caused by aging or damage to the seal, rupture of the pipeline, or improper installation.

2. Too high oil temperature: too high oil temperature will accelerate the aging of the oil, reduce the viscosity of the oil, increase the friction loss of the system, and even lead to the deterioration of the oil.

3. Oil pollution: The impurities and contaminants in the oil will wear and corrode the parts in the system, resulting in the degradation of system performance.

4. High system noise: It may be caused by the wear and looseness of hydraulic pumps, motors and other components, or the presence of bubbles in the system.

5. Slow or non-action of the actuator: it may be caused by excessive oil viscosity, insufficient system pressure, spool stagnation, etc.



1. Hydraulic oil leakage: check whether the seals and pipelines are in good condition, and replace them in time if damaged. Make sure all connections are tightened and installed correctly.

2. The oil temperature is too high: check whether the friction loss of the system is too large, and optimize the pipeline layout to reduce the elbow and reduce the pressure loss. Check the condition of the oil cooler regularly to make sure it is working properly. Change the fluid regularly and keep it clean.

3. Oil pollution: strengthen the tightness of the system to prevent external pollutants from entering. Regularly inspect the oil for contamination and replace the oil if necessary. Use high-quality fluids and filters to reduce impurities and contaminants in the fluid.

4. The system is noisy: check whether the hydraulic pump, motor and other components are worn and loose, and replace or tighten them in time if necessary. Check the system for air bubbles and remove them if necessary.

5. Slow or non-action of the actuator: check whether the viscosity of the oil is too high, and replace the appropriate oil if necessary. Check that the system pressure is sufficient and adjust the system pressure if necessary. Check that the spool is not stuck and clean or replace it if necessary.


In addition, in order to prevent the occurrence of hydraulic system failures, the following measures can be taken:

1. Regularly maintain and maintain the hydraulic system to ensure that the system is in good working condition.

2. Strengthen the training of maintenance personnel, so that they can understand the working principle of the system, common faults and solutions.

3. Introduce an automatic monitoring system to monitor the operation status of the system in real time, find potential problems in time and take corresponding measures.

4. Strengthen the safety of the system to ensure that the system will not cause harm to personnel and equipment during operation.


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