摘要

Pneumatic cylinders are widely used in industrial applications owing to its several advantages like low cost, high force/volume ratios, easy installation and maintenance, and the absence of significant heat. However, its use in complex control tasks is hindered by their highly nonlinear behaviour, especially nonlinear seal friction in pneumatic cylinders can impede the performance of pneumatic systems designed for high precision positioning with favourable high speed actuation. The behaviour of an elastomeric piston sealing 8-ring in high speed pneumatic cylinders is analysed by nonlinear finite element analysis using ABAQUS. The contact pressures, stress distributions and frictional forces of the piston seal are simulated with variation of interference fits, working pressures, friction coefficients.