COMPRESSOR Russian patent published in 2018 - IPC F04C18/02 F04C29/02 

FIELD: machine engineering.

SUBSTANCE: compressor contains a compression mechanism and a drive shaft (23) to drive this mechanism. An oil opening (71c, 72c, 73c) is formed on the shaft (23) communicating with the oil supply port (71a, 72a, 73a) having a flat surface or a recessed surface and having a width that is less than or equal to the diameter of the inlet (71a, 72a, 73a). The rear edge of the opening (71c, 72c, 73c) is displaced behind the rear edge of the inlet (71a, 72a, 73a) relative to the direction of rotation of the shaft (23). The opening (71c, 72c, 73c) is formed with a width that is less than or equal to the diameter of the inlet (71a, 72a, 73a). The shaft (23) is provided with a chamfered portion (71b, 72b, 73b) gradually widening from the open edge of the inlet (71a, 72a, 73a). The rear edge of the opening (71c, 72c, 73c) is displaced behind the rear edge of the chamfered portion (71b, 72b, 73b) with respect to the direction of rotation of the shaft (23). The two respective rear ends of the opening (71c, 72c, 73c) and the chamfered portion (71b, 72b, 73b) are disposed in the direction of rotation of the shaft (23).

EFFECT: preventing the accumulation of foreign matter in the shaft inlet, which reduces the damage to the bearing.

11 cl, 17 dwg