What are the reasons for poor sealing of hydraulic cylinder in hydraulic power station caused by excavator?
November 05, 2022
The leakage of hydraulic cylinder brings many hazards, which is not only one of the causes of various faults of hydraulic cylinder, but also an important factor affecting safety and polluting the environment, so it should be paid enough attention.
[What are the causes of poor sealing of hydraulic cylinder]
Poor sealing will cause external leakage and internal leakage. The causes of poor sealing are:
1. Seal is damaged due to improper assembly;
2. The assembly accuracy is poor, the clearance is too large, and the seal is damaged due to extrusion;
3. The sealing element is worn sharply and loses its sealing function;
4. The sealing ring is installed in the wrong direction (the lip of the sealing ring faces the pressure oil side), and the sealing function fails;
5. The sealing structure is unreasonable, the pressure exceeds the rated value, and the sealing effect is lost.
Poor connection
Poor connection mainly causes external leakage. The causes of poor connection are:
1. When the cylinder barrel and end cover are connected by bolts, the bolts are not fastened properly, and the burrs and assembly burrs of the joint part cause poor connection; The O-ring on the end face has a fit clearance;
2. When the cylinder barrel is connected with the end cover by thread, the rated torque is not reached when the end cover is fastened or the sealing performance of the sealing ring is poor.
3. The oil inlet pipe orifice of the hydraulic cylinder is loose due to the vibration of the pipe fittings.
Other causes of hydraulic cylinder leakage
1. The cylinder barrel expands under pressure, causing internal leakage;
2. The hydraulic cylinder with welded structure leaks due to poor welding;
3. If the lateral load is too large, try to reduce the load.
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