CRANKSHAFT FOR ROTARY COMPRESSOR, ROTARY COMPRESSOR AND REFRIGERATING CYCLE DEVICE

摘要

A crankshaft for a rotary compressor, comprising: a body (1) and an eccentric portion (2), the eccentric portion (2) being sheathed on the body (1), wherein at least one of a flexible structure (21) and an oil pressure surface (22) is arranged on the eccentric portion (2). The flexible structure (21) is configured to deform inwards when being borne with an external force in an inward direction. The oil pressure surface (22) is configured in such a way that in a direction opposite to a crankshaft rotating direction of the rotating central axis of a crankshaft (300), a distance between a front end (221) of the oil pressure surface (22) and the central axis of the eccentric portion (2) is smaller than a distance between a tail end (222) of the oil pressure surface (22) and the central axis of the eccentric portion (2). Also disclosed are a rotary compressor and a refrigerating cycle device. The crankshaft can effectively solve the problem of blocking of a rotary compressor caused by abnormal contact between a piston and an air cylinder, and a high-pressure oil wedge can be formed at the tail of an oil cavity, thereby increasing inlet oil pressure, and improving the environment of lubrication between an eccentric portion and a piston.