| 摘要 |
PROBLEM TO BE SOLVED: To suppress the lowering of the performance due to excess inflow of lubricating oil by providing an oil feed hole in a crankshaft and by arranging the opening positions of the oil feed hole adjacent to the turning bearing and adjacent to a main bearing in such a state that the oil film pressure of the turning bearing opening part generated in driving the compressor is set higher than the oil film pressure of the main bearing opening part. SOLUTION: When a turning scroll 3b starts the revolution movement by the rotation of a crankshaft 6 by a motor, a refrigerant gas sucked in a compression chamber of a compressor mechanism is compressed and discharged. Then, a differential pressure is generated between the discharge pressure, namely the pressure of a refrigerator oil storage part and the pressure of an intermediate pressure chamber, and the differential pressure sucks the refrigerator oil from a feed hole 11 of the crankshaft 6 and feeds it to the turning bearing 7. In this case, a recess 16 is formed in the crankshaft 6, top/bottom clearances 17a, 17b (17a>17b) are formed between the top/bottom projections of the recess 16 and the turning bearing 7, a throttle 15 is provided in the bottom clearance 17b, and a little quantity of refrigerator oil can be passed through to the compression chamber.
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