公开(公告)号：US20180334955A1

公开(公告)日：2018-11-22

申请号：US15983712

申请日：2018-05-18

Applicant: LG Electronics Inc.

Inventor： Yunhi LEE ,  Byeonghun YU ,  Wheesung OH ,  Byeongchul LEE

IPC: F02B55/08 ,  F02B55/02

CPC classification number: F02B55/08 ,  F02B55/02

Abstract: The present disclosure relates to a rotary engine having a crankshaft with an improved structure, the rotary engine including a housing, a rotor, housing covers, and a crankshaft installed to penetrate through the rotor so as to receive rotational force from the rotor, wherein the crankshaft includes a first member extending in one direction and having an insertion groove recessed in one side surface thereof, a second member extending to penetrate through a center portion of the housing and provided with a protruding portion on one end thereof to be fixedly inserted into the insertion groove, and a coupling member interposed at a position where the insertion groove and the protruding portion overlap each other such that the first member and the second member are closely coupled to each other.

公开(公告)号：US20180223845A1

公开(公告)日：2018-08-09

申请号：US15506448

申请日：2015-09-02

Applicant: LG ELECTRONICS INC.

Inventor： Seokhwan MOON ,  Yunhi LEE ,  Byeongchul LEE

IPC: F04C18/356 ,  F04C29/02

Abstract: Disclosed is a compressor. A lubrication surface, which has the same curvature as an inner circumferential surface curvature of a cylinder and which has a predetermined circumference length, is formed on an outer circumferential surface of a roller contacting an inner circumferential surface of the cylinder. With such a configuration, since the outer circumferential surface of the roller contacting the inner circumferential surface of the cylinder come in surface-contact with each other, an oil film is formed between the roller and the cylinder with a wide area. This can reduce a frictional loss.