Analysis of Piston Seal Performance of Pure Water Cylinder of Hydraulic Support

Abstract

Abstract Taking the piston seal of pure water hydraulic cylinder of hydraulic support as the research object, the sealing performance and damage characteristics are compared and analyzed for mountain seal and drum seal structures under different compressions and working medium pressures by the ANSYS Workbench. The two-dimensional axisymmetric models for the two structures are established. The compression deformation and stress of mountain seal ring and drum seal ring are simulated by setting different amount of compression and medium pressure. Findings showed that the most vulnerable area of the mountain seal ring is in the middle of the contact surface with the cylinder, and that of the drum seal ring is in its outer edge. The maximum contact stress of both the structured sealing rings increased with the increase of the medium pressure, and is always greater than the medium pressure, indicating good sealing performance. With the increase of compression and working medium pressure, the sealing performance of both kinds of rings decreased. When applied to the same piston, the sealing performance of mountain seal is better than that of drum seal under the same compression amount and medium pressure.