| 摘要 |
PROBLEM TO BE SOLVED: To suppress the precession of a crank shaft due to compression load to reduce wear and loss of a bearing section.SOLUTION: A sealed compressor has a frame 31 having a radial bearing part 31a located between a compressing element 3 and an electric element and for rotatably supporting a crank shaft 7, and a rolling bearing 6 arranged between the frame 31 and the crank shaft 7 and receiving load in a thrust direction acting on the crank shaft 7. A dynamic pressure groove 74 for generating the dynamic pressure by lubricating oil is arranged between the crank shaft 7 and the radial bearing part 31a. The dynamic pressure is generated by the lubricating oil from the spiral groove 73 flowing into the dynamic pressure groove 74 and axially supports the crank shaft 7. |
