Hydraulic jack seal how to choose
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Add time:2021-05-05 11:38
The first requirement for stable operation of hydraulic jacks is that the sealing performance should be stable. If the seal ring is not properly selected, hydraulic jacks can easily leak. How to prevent and how to solve the hydraulic jack leakage problem?
1. Selection of seals
The reliability of the hydraulic jack system depends to a large extent on the design of the hydraulic system seal and the choice of seals. Due to the irrational design of the seal structure in the design, the selection of the seal is not in line with the specification, and the hydraulic oil is not considered in the design. The type of compatibility with the sealing material, load conditions, limit pressure, working speed, and changes in ambient temperature. All of these causes the hydraulic system leakage directly or indirectly to varying degrees. In addition, due to dust and impurities in the operating environment of the construction machinery, appropriate dust seals should be selected in the design to prevent dust and other dirt from entering the system to damage the seal and contaminate the oil, thereby causing leakage.
2. Other design reasons
The design takes into account that the geometric accuracy and roughness of the moving surface are not comprehensive enough, and the strength check of the joints is not performed in the design, etc., and these all cause leakage in the mechanical work. At atmospheric pressure, about 10% of the air can be dissolved in the hydraulic fluid. Under the high pressure of the hydraulic system, more air or gas will be dissolved in the fluid. Air forms bubbles in the oil. If the hydraulic support is in operation for a very short period of time, the rapid pressure change between high and low pressures will cause the bubbles to generate high temperatures on the high pressure side and burst on the low pressure side if the hydraulic jack system is used. When there are pits and damage on the surface of the component, the hydraulic oil will rush toward the surface of the component at high speed. The seal is made of oil-resistant rubber and other materials. Due to prolonged use, aging, cracking, and damage will cause the system to leak. If the part is damaged by a collision during work, it will scratch the sealing element and cause the jack to leak.
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Add: Medical Packaging Industrial Zone,Lupu,Yuhuan,Zhejiang,China
