| 摘要 |
PURPOSE:To facilitate adjustment for a clearance between a blower and and an opposite wall thereto, by abutting a bearing part which rotatably supports a rotor being provided with an impeller and the blower at its both ends to a blower side-end-face through a clearance adjusting member so as to be able to adjust the clearance for the blower. CONSTITUTION:An expansion turbine rotatably accommodates a rotor 5 which provides an impeller 1 on one end and a blower 2 on the other end in a housing 3 and provides a nozzle cap 6, nozzle 7, and diffuser 8 on the impeller 1 side, also provides an inner cylinder 9 and a heat exchanger 11 on the blower 2 side coaxially with the rotor axis. And it has a gas passage from the space inside the cylinder 9 through a narrow gap toward the blower 2 into the space inside of the heat exchanger 11. In this case, a bearing part 4 is fastened through a shim 20 as a clearance adjusting member by a fastening bolt 24 which is threadedly engaged with the internal screw on the inner periphery of the end portion of the housing 3 and a wall 21 is formed by arranging the end face of the fastening bolt 24 facing to the blower 2 with a very small clearance so as to create gas passage. |
