Patent ID: 11971032
Assignee: LG ELECTRONICS INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A vane rotary compressor, comprising:
a casing;
a cylinder provided in an inner space of the casing;
a plurality of bearings forming a compression space together with the cylinder, and provided with a plurality of back pressure pockets each having a different pressure formed on a surface facing the cylinder;
a rotational shaft radially supported by the plurality of bearings;
a roller eccentrically inserted into the cylinder so that an outer circumferential surface of the roller has one contact point closest to an inner circumferential surface of the cylinder, wherein the roller is provided with a plurality of vane slots formed along a circumferential direction; and
a plurality of vanes slidably inserted into the plurality of vane slots of the roller, respectively, and configured to divide the compression space into a plurality of compression chambers, respectively, wherein at least one of the plurality of bearings is provided with an oil supply passage that provides communication between a space between an outer circumferential surface of the rotational shaft and an inner circumferential surface of the at least one of the plurality of bearings facing the outer circumferential surface of the rotational shaft and the plurality of back pressure pockets of the at least one of the plurality of bearings, wherein the oil supply passage communicates with a back pressure pocket having a relatively low pressure among the plurality of back pressure pockets, and wherein the oil supply passage includes a third oil supply hole that axially penetrates the cylinder, and a fourth oil supply hole that radially penetrates a flange portion of the at least one of the plurality of bearings so that the oil supply passage passes through an outer circumferential surface of the back pressure pocket and is directly connected to the back pressure pocket.