Piston seals for rotary mechanisms

Details Piston seals for rotary mechanisms Piston seals for rotary mechanisms

1975-10-23

1977-02-15

Vrablik, John J.

Rotary expansible chamber devices

Nutating working member

With mechanical sealing

418 53, 418123, 418142, F01C 102, F01C 1900, F04C 1702, F04C 2700

Patent

active

040080145

ABSTRACT:
An improved rotary mechanism including a housing defining an operating chamber, a shaft journalled in the housing and extending through the chamber, and a rotor having plural apices journalled on the shaft and within the chamber. The rotor includes apex seal receiving grooves at its apices and piston seal receiving bores intersecting the grooves. Apex seals are disposed in the apex seal receiving grooves while piston seals are disposed in the bores. Balance pistons are disposed within the bores and abut the associated piston seals adjacent the point of intersection of the bores and the grooves and fluid passages establish fluid communication between the bores and a portion of the rotor surface remote from the corresponding apex to provide for gas energization of the piston seals either by gas pressure directly against the piston seals or indirectly through gas pressure applied to the balance pistons for all cyclic stages of operation of the mechanism.

REFERENCES:
patent: 3485218 (1969-12-01), Clarke
patent: 3491730 (1970-01-01), Nilsson
patent: 3492974 (1970-02-01), Kreimeyer
Clarke et al., A New Class of Rotary Piston Machine Suitable for Compressors, Pumps, and Internal Combustion Engines, Proceedings at Institute of Mechanical Engineers, 1972, vol. 186 62/72, pp. 418-453, 743-753.

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