| 摘要 |
PURPOSE:To reduce vibration during the rotation with a less thermal contraction by integrating the normal temperature damper and the torque tube while specifying the ratio of the thickness between the two parts at a fixed value. CONSTITUTION:The normal temperature damper 2 and the torque tube 1 are firmly integrated by welding or the like, while the thickness of the damper is set at more than twice as large as that of the tube 1. Generally, the yield strength of the metal material at a cryogenic level more than doubles that at the normal temperature. This case, it can be considered that the yield strength of the tube approximately under the cryogenic level with doubles that at the normal temperature. On the other hand, as the yield strength under the normal temperature is considered to remain unchanged, if it requirement as mentioned above is met, the proportion of the thermal stress becomes roughly constant with respect to the yield strength of the parts and therefore, both parts are almost equal in the tolerance in regard to the thermal stress design. The thermal stress works in such a manner as to contract the damper and tension the tube 1. Thermal constraction can be lessend with a construction easy to build, thereby reducing the vibration during the rotation.
|
