| 摘要 |
PURPOSE: A sealing type compressor is provided to obtain a sliding area and an oil supply rate which are necessary for forming an oil film when operated in a low operation frequency area. CONSTITUTION: A sealing type compressor includes a crank shaft (9). The crank shaft includes a lower oil pump hole (94), an upper oil pump hole (95), a spiral groove (96), and a maximum load area (98). An inclination angle (&thgr;1) of the spiral groove for maintaining viscous oil pump functions of the spiral groove is not changed in the crank shaft. The lower oil pump hole, and the upper oil pump hole, and the spiral groove are located at areas except for the maximum load area. The upper oil pump hole is installed in an upper journal unit (93) at the area except for a predetermined upper area where a maximum load is generated. The lower oil pump hole is installed in the lower journal unit at the area except for a predetermined lower area where the maximum load is generated. The spiral groove can be wound over one time. [Reference numerals] (AA) Point of likeness |
