Rotary expansible chamber devices – With mechanical sealing – Axially movable end wall or end wall portion
Patent
1980-06-10
1982-11-09
Vrablik, John J.
Rotary expansible chamber devices
With mechanical sealing
Axially movable end wall or end wall portion
F01C 118, F01C 1908, F03C 208, F04C 218
Patent
active
043582605
ABSTRACT:
A rotary positive-displacement fluid-pressure machine which includes a casing, two intermeshing rotors, end plate means associated therewith, and a pressure-balancing arrangement associated with the end face of each end plate means remote from the rotors and with an adjacent casing face. The arrangement comprises sealing means which separate, one from another, a plurality of areas on said end face individually subjectable to fluid-pressures and which comprise resilient members disposed in respective grooves, as well as a non-extrudable element against portions of which those members bear. The members and element together establish fluid-sealing between the end face remote from the rotors and the adjacent casing face. At least one portion of said non-extrudable element is so disposed as to cross a respective land which is recessed to accommodate that portion.
REFERENCES:
patent: 3142260 (1964-07-01), Oliver
patent: 3371615 (1968-03-01), Pettyjohn et al.
patent: 3482524 (1969-12-01), Marietta
patent: 3539282 (1970-11-01), Forschner
patent: 3891360 (1975-06-01), Dworak et al.
patent: 4242066 (1980-12-01), Hodgson
Dowty Hydraulic Units Limited
Vrablik John J.
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