| 摘要 |
PURPOSE:To enable stable oiling to a bearing to be carried out, by communicating an eccentric hole space in the large diameter part of a main shaft with the space between the upper end surface of the main shaft and the under surface of the end plate of an oscillating scroll through a pressure equalizing hole, and providing a gas vent hole between the eccentric hole space and a shell space. CONSTITUTION:The eccentric hole space 6e of a main shaft 6 is communicated with the space 31 surrounded by the upper surface 6f of the main shaft, the under surface 2d of the end plate of an oscillating scroll, and the inner circumferential side surface 21a of a thrust bearing 21 through a pressure equalizing hole 29. The space being a balancer chamber 32 within the shell 12 surrounded by hearings 8, 9 is communicated with the space 6e through a gas vent hole 30. Thus, foaming refrigerant gas can be discharged into the shell space, so that stable oiling to a bearing can be carried out.
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