Radial seal of a rotary piston engine

Abstract

A radial seal of a rotary piston engine with trochoidal-shaped casing inner peripheral surfacing and multi-corner piston, with which sealing strips are arranged in radial grooves in the corners of the piston. The sealing strips under pressure of the operating chambers of the rotary piston engine engage against the casing inner peripheral surfacing and respectively against under-pressure-side groove wall configuration. The sealing strip along a radial underside thereof has a narrow, deep groove extending parallel to the sides of the sealing strip. A sheet-metal strip is installed with nominal clearance in this first meshing groove and the sheet-metal strip projects beyond the groove. A groove spring for the sealing strip is inserted or installed in the base of this groove. A further groove is arranged in the base of the groove for the sealing strip and an edge of the sheet-metal strip projecting beyond the sealing strip engages into the further groove and is supported along the base of this further groove against the pressure of the groove spring. The further groove has a groove clearance which equals the groove clearance of the groove for the sealing strip. A sheet-metal strip has a edge-side projections on a side thereof located in the groove thereof and the groove spring is supported against these projections. Alternatively, the groove spring is fastened or secured along a side of the sheet-metal strip located in the groove.

Dependencies are inferred from the claim text.