Patent ID: 9657737
Date: 2017-05-23
CPC Classifications: F04C

Claim:
1. A scroll compressor, comprising: a compressor housing; an output stage of compression disposed within the compressor housing having an output discharge pressure, the output stage comprising: a first seal disposed proximal to the outer periphery of the substantially circular base and forming an external seal between the substantially circular base and the compressor housing; a second seal disposed radially inward from the first seal and forming an internal seal between the substantially circular base and the compressor housing, wherein a space between the internal seal and the external seal defines a balance piston chamber; and an oil passage disposed within the compressor housing and configured to receive pressurized oil from one of: the oil passage configured to deliver the received pressurized oil to the balance piston chamber, such that thrust loading on the substantially circular base caused by an axial pressure differential across the substantially circular base is reduced in response to the received pressurized oil in the balance piston chamber.