| 摘要 |
PURPOSE:To support a frame with simple structure and hold the tightness of refrigerant gas by providing stepped parts engaged with the outer peripheral surface of a frame and also with the inner peripheral surface of a center shell, and fixing the frame and the center shell fittingly by baking on the upper and lower sides of the stepped parts. CONSTITUTION:A stepped part 5a for supporting a stepped part 4b provided on the peripheral side of a frame 4 by engagement is provided at the upper end part of a center shell 5 with a sub-frame 11 fitted to its lower end part. The center shell 5 and the frame 4 are fixed to each other by shrinkage fitting on the upper or lower side of the stepped parts 4b, 5a. The frame 4 to which large power is applied can be thereby supported on the center shell 5 with simple structure. The tightness of refrigerant gas having pressure difference between the upper and lower parts of the frame 4 can be also maintained. |
