| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a rotary fluid machine capable of preventing the displacement of a stator and a bearing installed in a vessel caused by the thermal expansion of the vessel during welding operation without increasing the number of part items. Ž<P>SOLUTION: A stationary core 13, a rotor 15 fixed to a main shaft 5, and a main bearing 6 and a sub-bearing 7 to support the main shaft rotatably are shrink-fitted to a cylindrical trunk 11, and then a compressor 20 is assembled. A ring 31 of a ring-shaped fixture 30 is positioned outside a fitting part 11c where the main bearing 6 is fitted to the cylindrical trunk 11, and then the cylindrical part 11 is pressed by turning a pressing bolt 32. In this state, the trunk 11 and an end plate 8 are welded to each other airtightly. During the welding operation, the trunk 11 is thermally expanded due to a temperature rise, however the displacement of the stator and the bearing and the deterioration of performance caused by the displacement are prevented by restricting the expansion in the radial direction by using the pressure bolt 32 so as not to release the fitting margin of the internally installed stator and the bearing. The method can be applied to the case that the trunk 11 and an end plate 9 with a mount plate are welded to each other. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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