| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem in which, as there is a portion in which a passage area is narrowed down and becomes resistance in the middle of a compression chamber oil supply path, pressure in a back pressure chamber becomes higher than pressure in the communicating compression chamber and becomes unstable.SOLUTION: As a cross sectional area of a recess is made to be larger than a passage area of a portion in which one opening of a passage overlaps with a recess part and a passage area in which the recess opens to the compression chamber, the passage area does not become resistance by being narrowed down. Thus, pressure in a back pressure chamber 22 does not become higher than pressure in the communicating compression chamber 10, a force applied on a slide surface of a fixation scroll 11 and a turning scroll 12 does not increase, and reliability improves especially at the time of high-speed and high-load operation.</p> |
