US 12,258,966 B2
Rotary compressor with vane support portion to suppress or prevent axial vane tilting
Joonhong Park, Seoul (KR); Seoungmin Kang, Seoul (KR); and Jinung Shin, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Feb. 16, 2024, as Appl. No. 18/443,400.
Claims priority of application No. 10-2023-0034742 (KR), filed on Mar. 16, 2023.
Prior Publication US 2024/0309870 A1, Sep. 19, 2024
Int. Cl. F04C 18/344 (2006.01); F01C 21/08 (2006.01); F01C 21/10 (2006.01); F04C 29/02 (2006.01); F04C 29/12 (2006.01)
CPC F04C 18/344 (2013.01) [F01C 21/0854 (2013.01); F01C 21/108 (2013.01); F04C 29/02 (2013.01); F04C 29/12 (2013.01); F04C 2240/50 (2013.01); F04C 2270/12 (2013.01); F04C 2270/13 (2013.01); F04C 2270/16 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A rotary compressor, comprising:
a casing;
a cylinder fixed inside of the casing to define a compression space;
a main bearing and a sub bearing respectively disposed on both sides of the cylinder in an axial direction;
a rotational shaft supported on the main bearing and the sub bearing;
a roller disposed on the rotational shaft, and forming at least one contact point at which an outer circumferential surface thereof is in contact with an inner circumferential surface of the cylinder; and
at least one vane slidably inserted into the roller to divide the compression space into a plurality of compression chambers when the roller is rotated within the cylinder, wherein at least one back pressure pocket having a predetermined depth is formed in a bearing surface, facing the roller, of at least one of the main bearing or the sub bearing, wherein a vane support portion is formed on the bearing surface to support the at least one vane in the axial direction, wherein the vane support portion extends from an inner circumferential surface of the at least one back pressure pocket at a side adjacent to the contact point along a reciprocating direction of the at least one vane, wherein the at least one back pressure pocket includes an inner wall surface, an outer wall surface, and a first side wall surface and a second side wall surface that connect ends of the inner wall surface and the outer wall surface, wherein the vane support portion is formed as the second side wall surface and the outer wall surface adjacent to the contact point extends toward the inner wall surface, wherein an inner circumferential surface of the vane support portion is formed in an area where the second side wall surface and the outer wall surface meet, and wherein a gap between the inner circumferential surface of the vane support portion and the inner wall surface is gradually decreased in a direction toward the contact point.