| 摘要 |
According to the present invention, there is provided a scroll type fluid machinery, in which a stationary scroll (1) and a revolving scroll (2) having spiral wraps set up on inner surfaces of respective end plates are engaged with each other, a drive bushing (54) is inserted rotatably into a boss (23) which is projected at a central part of an outer surface of the end plate of the revolving scroll, and an eccentric driving pin (53) of a rotary shaft is fitted slidably into a slide groove (55) bored through the drive bushing, characterised 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 envolving 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. <IMAGE> |
