Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1996-05-31
1997-12-09
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418270, 417902, 384912, 384913, F04C 1804, F04C 2900, F16C 1704, F16C 3312
Patent
active
056953267
ABSTRACT:
A compressor for a refrigeration machine is provided without any problems of reduction in the life of a thrust bearing structure even when a substitutive coolant not containing any chlorine is used. In the compressor for a refrigeration machine having a thrust bearing made of steel for supporting a thrust load applied to a drive shaft, a thrust bearing surface made of a material different from that of the drive shaft is formed in the thrust bearing by means of a surface treatment. Alternatively a washer defining the thrust bearing surface may be surface treated to provide a material different from that of the drive shaft. The washer may also be made of a material different from that of the drive shaft. According to the the present invention, even when a boundary lubricating state is produced between the drive shaft and the thrust bearing surface sticking is prevented. As a result, the life of the thrust bearing structure of the drive shaft can be made longer and a problem of reduction in the life of the thrust bearing structure can be avoided even when a substitutive coolant not containing any chlorine is utilized.
REFERENCES:
patent: 3902770 (1975-09-01), Heep et al.
patent: 5007810 (1991-04-01), Fraser, Jr. et al.
patent: 5072707 (1991-12-01), Takai et al.
patent: 5356277 (1994-10-01), Yamaguchi et al.
patent: 5387461 (1995-02-01), Kamiya et al.
patent: 5427511 (1995-06-01), Caillat et al.
Fukuoka Hirotsugu
Matsunaga Hiroshi
Muramatsu Shigeru
Oka Hideto
Tsubokawa Masahiro
Matsushita Electric - Industrial Co., Ltd.
Vrablik John J.
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