Scroll type fluid machinery with driving pin in bushing slide gr

Details Scroll type fluid machinery with driving pin in bushing slide gr Scroll type fluid machinery with driving pin in bushing slide gr

1991-05-30

1992-11-24

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 57, F01C 104, F01C 1706

Patent

active

051658798

ABSTRACT:
A scroll type fluid machinery has a stationary scroll and a revolving scroll having spiral wraps set up on inner surfaces of respective end plates in engagement with each other. A drive bushing is inserted rotatably into a boss which is projected at a central part of an outer surface of the end plate of the revolving scroll. An eccentric driving pin of a rotary shaft is fitted slidably into a slide groove bored through the drive bushing. A gap between one end of the slide groove in a direction that the radius of revolution becomes larger and the eccentric driving pin is set to a preset very small distance .delta. (here, .delta. is a value determined based on processing error, deformation due to temperature and pressure and the like of the above-mentioned respective scrolls) when the revolving scroll occupies a position of theoretical radius of revolution thereof. With this, it is possible to prevent the drive bushing from tiltably rotating beyond what has been predetermined while the revolving scroll is revolving.

REFERENCES:
patent: 4435137 (1984-03-01), Terauchi
patent: 4764096 (1988-08-01), Sawai et al.
patent: 4808094 (1989-02-01), Sugimoto et al.
patent: 5040958 (1991-08-01), Arata et al.

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