Analytical study of the extrusion of rectangular elastomeric seals for linear hydraulic actuators

摘要: AbstractRectangular elastomeric seals used on reciprocating piston rods in high-pressure hydraulic actuators often suffer from extrusion damage at the low-pressure side of actuators. The takes place narrow clearance between rod and actuator, where seal develops a ‘nip’ under conditions high sealed pressure and/or friction with rod, which is amplified absence back-up ring. This form strain can lead to permanent impair sealing performance system. paper deals modelling this kind extrusion. Algebraic equations were developed describe shape contact extruded part rod. A study presented about effects various operating parameters extent order minimize risks damage. It was found that only use ring adequately cancel mechanism.