| 摘要 |
PURPOSE:To always form a proper oil film in a bearing by arranging a pressure drop suppressing means to prevent foaming of refrigerant gas by a sudden drop in feed oil pressure in bearing lubricating shaft directional oil feed grooves to which lubricating oil is supplied through an oil feed passage bored in a crank part. CONSTITUTION:When being rotated by a motor, a scroll shaft (crankshaft) 9 composed of a shaft part 9a and a scroll part 9b being an eccentric shaft, makes the scroll part 9b and a turning scroll 3 fixed to this through a slide bearing 8 carry out turnign motion to a fixed scroll 2. In order to supply lubricating oil to slide bearings 8, 11 and 12 supporting such scroll shaft 9, shaft directional oil feed grooves 35, 37 and 39 are formed on a bearing outside surface, but in this case, the respective oil feed grooves 35, 37 and 39 are formed in a V-shape to prevent pressure reduction. Oil is fed to the respective oil feed grooves 35, 37 and 39 through an oil chamber 20 and oil feed holes 26 and 33 from an oil feed passage 19 formed in the crankshaft 9. |
