SEALED COMPRESSOR AND REFRIGERATION UNIT INCLUDING SEALED COMPRESSOR

摘要

A sealed compressor of the present invention comprises a sealed container (101) accommodating an electric component (105) and a compression component (106) and storing lubricating oil (102); wherein the compression component (106) includes a shaft (110) including a main shaft section (111), a main bearing unit (120), and a thrust ball bearing (132); wherein the main shaft section (111) is provided with a first oil feeding passage (150) to transport the lubricating oil (102); the thrust ball bearing (132) includes a cage (133), balls (134), an upper race (135) and a lower race (136), and the thrust ball bearing (132) is provided with a second oil feeding passage (160) communicated with the first oil feeding passage (150) and configured to feed the lubricating oil (102) to the raceway groove provided in at least one of the upper race (135) and the lower race (136), and a discharge passage (180) through which the lubricating oil (102) is discharged.

主权项

1. A sealed compressor comprising:
an electric component including a stator and a rotor; a compression component actuated by the electric component; and a sealed container accommodating the electric component and the compression component and storing lubricating oil for lubricating the compression component; wherein the compression component includes a shaft including a main shaft section to which the rotor is fastened and an eccentric shaft section, a cylinder block accommodating a piston reciprocatable according to rotation of the shaft, a main bearing unit mounted on the cylinder block to support the main shaft section, and a thrust ball bearing disposed between a flange surface formed in the shaft and a thrust surface formed in the main bearing unit; the main shaft section is provided with a first oil feeding passage to transport the lubricating oil from a lower portion of the main shaft section to an upper portion of the main shaft section; the thrust ball bearing includes a plurality of balls held in a cage, an upper race disposed such that one of its main surfaces is in contact with upper portions of the balls; and a lower race disposed such that one of its main surfaces is in contact with lower portions of the balls; the main surface of the upper race and the main surface of the lower race face each other; at least one of the main surface of the upper race and the main surface of the lower race, the main surfaces facing each other, is provided with a raceway groove which is formed by an annular groove, and in which the balls are placed; the thrust ball bearing is provided with a second oil feeding passage communicated with the first oil feeding passage and configured to feed the lubricating oil to the raceway groove and a discharge passage through which the lubricating oil fed to the raceway groove is discharged to outside of the thrust ball bearing and; the thrust surface is provided with a discharge hole to discharge the lubricating oil.