Thrust bearing arrangement for a drive shaft of a scroll compres

Details Thrust bearing arrangement for a drive shaft of a scroll compres Thrust bearing arrangement for a drive shaft of a scroll compres

1994-06-16

1995-05-09

Bertsch, Richard A.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 94, 384123, 384369, F01C 104

Patent

active

054134692

ABSTRACT:
To reduce a load applied to the thrust bearing, to prevent the thrust bearing from seizing and to improve the service life of the thrust bearing, the thrust bearing is provided between a drive shaft and a block to seal a high-pressure side space from a low-pressure side space. By providing an oil supply through hole, one end of which opens into high-pressure side space and the other end of which opens into a space formed by inserting the shaft into the insertion hole, high-pressure lubricating oil can be supplied to the space. The constric within the shaft with the effect of the constriction clearance is formed between the aforementioned oscillating shaft and the insertion hole, and a pressure differential between the two ends of the drive shaft is eliminated. Furthermore, by forming a circular oil groove at a sliding surface where the aforementioned thrust bearing and the drive shaft are in contact with each other and communicating channels that communicate between the circular oil groove and an external circumferential area of the aforementioned thrust bearing, the high-pressure lubricating oil is induced to the circular oil groove and the communicating channels to apply an upward force to the drive shaft.

REFERENCES:
patent: Re33473 (1990-12-01), Hazaki et al.
patent: 4734020 (1988-03-01), Inaba et al.
patent: 5215452 (1993-06-01), Yamamura et al.
patent: 5217359 (1993-06-01), Kawahara et al.

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