Radial seal of a rotary piston engine

Details Radial seal of a rotary piston engine Radial seal of a rotary piston engine

1987-08-27

1988-12-13

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Seal on working member periphery separates inlet and outlet...

F01C 1904

Patent

active

047907347

ABSTRACT:
A radial seal for a rotary piston engine having a trochoidal-shaped casing inner surfacing and a multi-corner piston with which sealing strips are arranged in radial grooves in the corners of the piston. The sealing strips engage under pressure of the operating chambers against the casing inner peripheral surfacing and respectively against the lower-pressure-side groove wall. The sealing strips have perforations or openings between the sealing surfaces coming into engagement along the groove walls. Filler pieces are inserted or installed with nominal clearance in the perforations or perforations in the sealing strip. These filler pieces are narrower in peripheral direction in the dimensioning or measurement thereof compared with the sealing strip. A spring holds the filler pieces in continuous engagement against an upper part of the sealing strip. Groove clearance of the sealing strip amounts to a value in a range of 0.04 to 0.08 mm and the groove clearance of the filler pieces amounts to a value in a range of 0.1 to 0.2 mm.

REFERENCES:
patent: 3176909 (1965-04-01), Maurhoff
patent: 4403930 (1983-09-01), Kodama

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