Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1988-01-25
1989-08-22
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 75, F04C 1804
Patent
active
048591599
ABSTRACT:
In the displacement machine for compressible media described in the specification, a stationary housing has two spiral displacement chambers and a spiral displacement body is engaged in each displacement chamber. The displacement body extends essentially perpendicularly to a disc-shaped rotor which can be driven eccentrically relative to the housing. In order to avoid butting of the displacement bodies against the walls of the displacement chambers resulting from different heat expansions of the rotor and the housing while maintaining a relatively small clearance between the peripheral contours of the displacement bodies and the peripheral walls of the displacement chambers, the radially outer peripheral walls of the displacement chambers have recesses in their upper edges which extend in the peripheral direction. The height of the recesses is approximately one quarter of the chamber height and the maximum depth of the recesses is approximately 0.15 mm.
REFERENCES:
patent: 3874827 (1975-04-01), Young
patent: 4199308 (1980-04-01), McCullough
patent: 4443166 (1984-04-01), Ikegawa et al.
patent: 4490099 (1984-12-01), Terauchi et al.
patent: 4514150 (1985-04-01), Hiraga et al.
Volkswagen AG
Vrablik John J.
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