Airtightness forma sukuro - ru compressor

摘要

PURPOSE: To securely feed an oil to a key and keyway being the sliding parts of a rotation prevention mechanism to suppress seizure and sticking from occurring by providing a space in which a middle pressure between a suction pressure and a discharge pressure is maintained, and also providing a rotation prevention member in the space. ;CONSTITUTION: A closed type scroll compressor is provided with a fixed scroll 3, a turning scroll 6 combined with it, a crankshaft 8, and a closed container 13. The back surface of the turning scroll 6 is sealed in pressure from a space inside the closed container 13. Then a space (back pressure chamber) 25 which is connected to a compression chamber formed of both the scroll members 3 and 6 through a connecting path 17 and in which a middle pressure between a suction pressure and a discharge pressure is maintained is provided. In back the pressure chamber 25, a rotation prevention member 7 to prevent the turning scroll 6 from rotating and an oil supply means to feed the lubricating oil 20 accumulated in the closed container 13 into the back pressure chamber 25 is provided. Thus, oil is fed securely to the sliding parts of the rotation prevention member 7 to obtain favorable lubricating conditions.;COPYRIGHT: (C)1994,JPO&Japio