| 摘要 |
<p>PURPOSE:To reduce the machining manpower and the assembling manpower, by integrating an annular retainer contactable against a sealing member at a bearing section of a rotary shaft in a volume type compressor with a backup ring. CONSTITUTION:A sealing member 9 provided at a bearing section 8 of a rotary shaft 4 has a lip portion 11 slidable liquid-tightly against the outer circumference of the rotary shaft 4. In order to maintain the position of said sealing member 9, an annular retainer 13 contactable against the sealing member 9 is formed integrally with a backup ring 14 which contacts against the lip portion 11 and prevents falling off of the lip portion 11 from an annular coil spring 12 when said lip portion 11 is deformed by the pressure fed from an air-tight chamber R. Since the retainer and the backup ring are not required to be constructed with independent members nor a negative pressure hole for preventing application of pressure from the air-tight chamber onto the lip portion is required to be made through housing, part machining manpower and assembling manpower can be reduced remarkably.</p> |
