Abstract
In this study, the mechanical properties of a combined seal ring under different loads were numerically calculated using ANSYS. The effect of the working pressure and pre-compression ratio of a rubber O-ring on the contact stress of the combined seal ring was studied. The influence of the wear ring’s chamfer, thickness, and width on the contact stress and contact force of the combined seal ring was analyzed. Studies have shown that it is particularly important to select a compression ratio that is suitable for the working conditions. Under the same conditions of working pressure and compression ratio, upon increasing the wear ring chamfer, the contact pressure is decreased due to the decreasing contact bandwidth between the wear ring and the cylinder wall. This has little effect on the contact stress of the combined seal ring as well as the contact force, while the width of the wear ring is proportional to the latter.
Highlights
Sealing performance is one of the most important indicators used to measure the performance of hydraulic cylinders
ANSYS was used to analyze the mechanical characteristics of a combined seal ring under a load, the key factors affecting the sealing performance of the combined seal ring were studied, and the influence of the working pressure and the pre-compression rate of the rubber O-ring on the contact stress of the combined seal ring was analyzed
This paper mainly studies the contact stress of the three sealing faces of I, II, and III in the figure and the contact force F at I
Summary
Sealing performance is one of the most important indicators used to measure the performance of hydraulic cylinders. Combined seals are widely used in hydraulic cylinder piston seals due to their good sealing performance, high pressure resistance, low friction, and high-speed of operation [4,5]. Studies have shown that the use of reasonable texture patterns and depth helps to reduce the wear between the seal ring and the hydraulic cylinder. Many researchers have studied the sealing, friction, and wear of reciprocating seals and analyzed the influence of material parameters, working condition parameters, and compressibility on the sealing performance. ANSYS was used to analyze the mechanical characteristics of a combined seal ring under a load, the key factors affecting the sealing performance of the combined seal ring were studied, and the influence of the working pressure and the pre-compression rate of the rubber O-ring on the contact stress of the combined seal ring was analyzed. Μ1—Coefficient of the friction of the inner wall of the cylinder against the wear ring
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