| 摘要 |
PURPOSE:To decrease wear of an end plate by providing grooves of outer and inner side directions in an annular groove on an end plate of a turning scroll and variably generating passing resistance of the groove in the inner side direction by a superconductor and a permanent magnet. CONSTITUTION:A groove 24 of outer side direction and a groove 25 of inner side direction are provided in an annular groove 23 in an end plate 2a of a turning scroll 2. A fixed scroll 1 and the turning scroll 2 arrange a permanent magnet 27 and a superconductor 26 to be opposed variably generating passage resistance of the groove 25 of inner side direction. Thus immediately after starting operation, the superconductor 26, by its Meissner effect, is repulsed by the permanent magnet 27, decreasing the passage resistance of the groove 25 of inner side direction. Accordingly, a pressure in a back pressure chamber 20 decreases, because lubricating oil is instantaneously guided to a suction chamber 12 passing through the back pressure chamber 20 and each groove 24, 25, the end plate 2a decreases its wear, and a decrease of EER by increasing mechanical loss can be prevented. |
