| 摘要 |
PURPOSE: A 2-stage rotary compressor is provided to enhance the lubricating effect since the depth of an oil groove is maintained and the oil is smoothly supplied through the oil groove. CONSTITUTION: A 2-stage rotary compressor comprises an airtight container, a shaft comprising a low-pressure eccentric part(113a) and a high-pressure eccentric part, low-pressure compression assembly, high-pressure compression assembly, an oil penetration hole, a low-pressure oil groove(115b), a low-pressure oil connecting hole(115a), a high-pressure oil groove, and a high-pressure oil connecting hole. The oil penetration hole is formed in the shaft along the axis. The low-pressure oil groove is formed on the outer circumferential surface of the low-pressure eccentric part and the longitudinal direction of the low-pressure oil groove is parallel to the axial direction of the shaft. The low-pressure oil penetration hole connects the oil penetration hole to the low-pressure oil groove. The high-pressure oil groove is formed on the outer circumferential surface of the high-pressure eccentric part and the longitudinal direction of the high-pressure oil groove is parallel to the axial direction of the shaft. The high-pressure oil penetration hole connects the oil penetration hole to the high-pressure oil groove. |
