Scroll compressor having changeable axis in eccentric drive

Details Scroll compressor having changeable axis in eccentric drive Scroll compressor having changeable axis in eccentric drive

1989-04-10

1991-08-20

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 57, 418151, F04C 1804

Patent

active

050409581

ABSTRACT:
A scroll compressor comprising a stationary scroll member having a stationary spiral wrap extending from a stationary end plate, an orbiting scroll member having an orbiting spiral wrap extending from an orbiting end plate with the wraps of the stationary scroll member and orbiting scroll member engaging with each other to form a fluid compressing chamber. A main shaft rotates on its own axis, with an eccentric drive shaft being provided having an axis spaced from the axis of the main shaft to orbit around the axis of main shaft and so that the eccentric drive shaft drives the orbiting scroll member to orbit around the axis of the stationary scroll member. The eccentric drive shaft is guided on the main shaft so that a distance between the axis of eccentric drive shaft and the axis of main shaft can be changed, and the main shaft drives the eccentric drive shaft to orbit around the axis of the main shaft. A balance is connected to the eccentric drive shaft, with a center of gravity of the balance weight being spaced from the axis of main shaft so that the centrifugal force of the balance weight draws the eccentric drive shaft toward the main shaft. An arrangement is provided for pushing the eccentric drive shaft away from the main shaft.

REFERENCES:
patent: 3884599 (1975-05-01), Young et al.
patent: 3924977 (1975-12-01), McCullough
patent: 4580956 (1986-04-01), Takahashi et al.
patent: 4597724 (1986-07-01), Sato et al.
patent: 4838773 (1989-06-01), Noboru

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