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1. (WO2018179356) ROTARY COMPRESSOR AND REFRIGERATION CYCLE DEVICE

Pub. No.:    WO/2018/179356    International Application No.:    PCT/JP2017/013653
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Sat Apr 01 01:59:59 CEST 2017
IPC: F04C 18/356
F04C 29/02
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: IMAGAWA, Yuichiro
今川 祐一朗
NAGASAWA, Hiroki
長澤 宏樹
Title: ROTARY COMPRESSOR AND REFRIGERATION CYCLE DEVICE
Abstract:
In an inner peripheral section of a bearing (40) rotatably supporting a crankshaft (4), an oil groove (42) is formed outside a region where oil film reaction force of a refrigerator oil is generated against a gas load applied to the bearing due to a compression action of a compression chamber. The oil groove (42), extending from a base end of the inner peripheral section of the bearing (40) toward a tip end thereof, branches into a plurality of grooves in the middle of the inner peripheral section, wherein the flow path cross-sectional area of each of the branched off oil grooves is smaller than the flow path cross-sectional area of the oil groove before branching.