Design and material characteristics of hydraulic cylinder sealing device

The hydraulic cylinder delivers the energy and speed of the change in the enclosed oil volume. The quality of the sealing device will directly affect the working performance of the hydraulic cylinder. A hydraulic cylinder with poor sealing will not only contaminate the situation, reduce volume, increase power loss, and unintentionally also affect the normal operation of the hydraulic cylinder. The right seal is impossible. The piston rod moves back and forth, always bringing out the oil. However, this type of leakage should be small. Similarly, if the reciprocating movement of the piston rod does not bring out the slightest amount of oil, the piston rod is in dry contact, which will affect the working performance and life of the hydraulic cylinder.

When planning a sealing device, it is necessary to control the use of the hydraulic cylinder, the application pressure, the flow speed, the task environment, the performance of the working fluid and additives, the material, shape, use, argumentation of the seal, the amount of leakage agreed, and the level of engagement. Processing precision and smoothness, etc., in order to select seals correctly and reasonably, and manage seals.

The materials used for hydraulic cylinder seals must have unnecessarily oil resistance, sulphur resistance, heat resistance, cold resistance, chemical resistance, and have certain rebound and compressive strength.

The sealing device is improperly managed. The seal will be squeezed out, twisted or even broken under the influence of hydraulic pressure, which will cause oil leakage. Perhaps the debris of the seal will jam the gap and make the hydraulic cylinder too late to move abnormally. In order to prevent this kind of phenomenon, it is necessary to determine the fit gap between the two sealing surfaces according to the moderate pressure, accurately determine the hardness of the sealing material, and use a protective retaining ring when required.