Thermodynamic and Sealing Performance Analysis of Reciprocating O-Rings in Hydraulic Cylinders
Nana Tao
Abstract:In mechanical engineering practice, the service life and sealing performance of equipment are inextricably linked to the performance of O-ring rubber seals. Moreover, thermodynamic factors play a significant role in the performance of these sealing rings, especially in the high-speed reciprocating motion of hydraulic cylinders. Consequently, an integration of thermodynamic factors into the performance analysis of O-rings is necessary. Using a specific type of O-ring in a hydraulic cylinder as an example, the m… Show more
“…They used empirical equations to calculate the average temperature rise in the sealing zone, ignoring the changes in the temperature gradient along the axial direction and film thickness. Tao N. 18 characterized rubber material's mechanical properties using finite-element and experimental methods to derive material parameters. He investigated the effects of different compression ratios, friction coefficients, and working oil pressures on the maximum Von Mises stresses and contact stresses, providing a theoretical basis for analyzing the thermomechanical properties and optimal structural design of O-ring rubber seals.…”
This paper presents an experimental and theoretical investigation into the factors influencing the sealing performance of combined slip rings. Factoring in the frictional heat from micro convex bodies and convective heat exchange between the slip ring, oil film, and air, we formulate a thermoelastic flow hybrid lubrication model for the combined slip ring seal. This model calculates the distribution of oil film thickness, pressure, temperature, velocity, and viscosity in the sealing zone, drawing on the generalized average Reynolds equation and the transmembrane average energy equation, in conjunction with the heat conduction equation of the slip ring. Utilizing the Archard wear model, we also examine the wear characteristics of the combined slip ring seal, providing insights into seal wear under these conditions. The model enables an analysis of the interplay between parameters and their impact on seal performance. The method proposed accurately predicts friction and leakage in line with experimental data, thereby providing a theoretical foundation for further numerical investigation of seal characteristics.
“…They used empirical equations to calculate the average temperature rise in the sealing zone, ignoring the changes in the temperature gradient along the axial direction and film thickness. Tao N. 18 characterized rubber material's mechanical properties using finite-element and experimental methods to derive material parameters. He investigated the effects of different compression ratios, friction coefficients, and working oil pressures on the maximum Von Mises stresses and contact stresses, providing a theoretical basis for analyzing the thermomechanical properties and optimal structural design of O-ring rubber seals.…”
This paper presents an experimental and theoretical investigation into the factors influencing the sealing performance of combined slip rings. Factoring in the frictional heat from micro convex bodies and convective heat exchange between the slip ring, oil film, and air, we formulate a thermoelastic flow hybrid lubrication model for the combined slip ring seal. This model calculates the distribution of oil film thickness, pressure, temperature, velocity, and viscosity in the sealing zone, drawing on the generalized average Reynolds equation and the transmembrane average energy equation, in conjunction with the heat conduction equation of the slip ring. Utilizing the Archard wear model, we also examine the wear characteristics of the combined slip ring seal, providing insights into seal wear under these conditions. The model enables an analysis of the interplay between parameters and their impact on seal performance. The method proposed accurately predicts friction and leakage in line with experimental data, thereby providing a theoretical foundation for further numerical investigation of seal characteristics.
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