| 摘要 |
PURPOSE:To prevent a heat radiation shield from deforming even in case of high speed rotation by press-fitting both ends of the shield to ring-shaped projections formed at the paired positions of a torque tube, and further engaging a ring- shaped retainer with the outer periphery. CONSTITUTION:A heat radiation shield 9 is press-fitted at both ends by shrink- fitting to ring-shaped projections 3a, 3b formed at the paired positions at a longer interval than a cryostat 2 of a torque tube 3, and a ring-shaped retainer 13 is further engaged by shrink-fitting with the outer periphery of the shield 9 to construct to metal plane-contact the shield 9 uniformly with the projections 3a, 3b. Thus, the deformation of the shield 9 can be prevented even at the high speed rotation, and the invaded heat partly absorbed to the shield 9 can be efficiently transmitted from the projections 3a, 3b to the tube 3. |
