Scroll type fluid machinery with counter weight on drive bushing

Details Scroll type fluid machinery with counter weight on drive bushing Scroll type fluid machinery with counter weight on drive bushing

1992-09-04

1993-04-06

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 555, 418 57, 418151, F01C 104, F01C 1706, F01C 2100

Patent

active

051998629

ABSTRACT:
A scroll type fluid machinery has a stationary scroll and a revolving scroll in which spiral wraps are set up at end plates, and are engaged with each other. A drive bushing is fitted rotatably into a boss projected at the central part of the outer surface of the end plate of the revolving scroll, and a drive pin projecting from the rotary shaft is fitted slidably into a slide hole bored in the drive bushing. A counter weight which generates a centrifugal force having an opposite direction to a centrifugal force acting on the revolving scroll at the time of revolving motion in a solar motion thereof is provided on the drive bushing. Further, the contact pressure between the wrap of the revolving scroll and the wrap of the stationary scroll is prevented from becoming excessive even at the time of high speed rotation of the rotary shaft.

REFERENCES:
patent: 4435137 (1984-03-01), Terauchi
patent: 4522574 (1985-06-01), Arai et al.
patent: 4580956 (1986-04-01), Takahashi et al.
patent: 4708607 (1987-11-01), Hayano et al.
patent: 4836758 (1989-06-01), Elson et al.
patent: 5040958 (1991-08-01), Arata et al.

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