Scroll type fluid machinery

Details Scroll type fluid machinery Scroll type fluid machinery

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 2/02 (2006.01) F04C 18/02 (2006.01) F04C 29/00 (2006.01)

Patent

CA 2043602

According to the present invention, there is provided a scroll type fluid machinery, in which a sta- tionary scroll and a revolving scroll having spiral wraps set up on inner surfaces of respective end plates are engaged 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, and an eccentric driving pin of a rotary shaft is fitted slidably into a slide groove bored through the drive bushing, characterized in that 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 abovementioned respective scrolls) when the evolving scroll occupies a position of theoretical radius of revolution thereof. With this, it is possible to prevent the drive bushing from rotating with a gradient beyond what has been predetermined while the revolving scroll is in revolution.

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