Piston Seal Optimises Load-Bearing Capacities

By separating the dynamic and static sealing functions, the Simrit T-ring as a piston seal optimises load-bearing capacities. The single-piece, symmetrical piston seal, which will be presented for the first time at the 2011 Hanover Trade Fair, has both a radial and an axial component. The dynamic sealing function is assumed by a sealing area with a large radius. The radial force required for this is built up by the geometric interference alone.

This eliminates the radial compression of the seal cross section, creating ideal preconditions for the minimisation of friction and wear and the elimination of stick-slip effects. Due to the much thinner area of the T-ring, a kind of diaphragm, the static sealing function is built up simultaneously and separately, and is optimised according to function. The static sealing force is generated by the pressure from the concentric sealing edges on the front face of the groove alone. In endurance tests, an NBR version of the Simrit T-ring showed only negligible wear.

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