In order to ensure the hydraulic cylinder under any working condition will not leak, the sealing work is particularly important, below Wuhan star Xingda hydraulic and gas dynamic equipment Co., Ltd. to tell everybody hydraulic cylinder seals have what? Use a seal for a O ring, sealing parts, roller sealing and dustproof ring and other components collocation of hydraulic cylinder. The hydraulic pump manufacturers to introduce each with a different seal what role.
First, O static seal ring, can bear working pressure is reached more than 20MPa, in order to improve the performance of general and PTFE ring.
Secondly, according to the sealing parts, the use of different objects can be divided into V shaped hole sealing, U hole sealing, sealing, sealing Gelaikong combination. The V-shaped sealing is mainly used for heavy load hydraulic cylinder, installed in the back-to-back, guide elements for copper sleeve; U-shaped sealing and water conservancy projects used cylinder, closed trench installation, the guide member for guiding belt; Gelaikong seal generally used for internal leakage requirement is not high servo cylinder, the combined sealing are generally used for application of internal structure is very compact cylinder, due to its own component oriented, no need to use additional.
Again, the roller seal is also divided into V shape, U shape seal, seal, seal. Stern shaft seal are generally used for cylinder piston rod sealing system of the main seal, but because it has some back to the oil, it is necessary to collocate with other sealing ring composed with. U shaped seal can be used separately in the following 20MPa working pressure, and in the above 20MPa working pressure is the need to increase the ring.
The dust ring is generally divided into double acting dust ring and single acting dust ring, should choose according to the seal and the working environment and.
Finally, the piston rod of the hydraulic cylinder seal common combination for the best collocation stepseal +U shaped hole plus single dust ring, V hole sealing + dust ring, double stepseal + double acting dust ring.
