| 摘要 |
PURPOSE:To reduce the extent of load on a bearing part supporting a turning shaft, by installing each balance weight in having each individual one situated in an opposition direction to the eccentric direction of an eccentric part in the turning shaft and an orthogonal direction in front of a direction of rotation of the turning shaft, respectively. CONSTITUTION:In case of a turning shaft 1, the main shaft 1a is supported by a bearing part 2a of a frame 2 and the eccentric part 1b is fitted in a boss part 3a of a turning scroll 3. In the above-mentioned constitution, in a connecting part 1c connecting the main shaft 1a and the eccentric part 1b together, there is provided with an opposite side balance weight 4 as situated in the opposite direction to an eccentric direction of the eccentric parts 1b. With this installation, centrifugal force in the opposite direction to the eccentric direction is made to act on the turning shaft 1. Likewise, in this connecting part 1c, there is provided with a rectangular side balance weight 5 as situated in an orthogonal direction in front of a direction of rotation of the turning shaft to the eccentric direction of the eccentric part 1b. With this constitution, centrifugal force in the opposite direction to a radial component of compressed gas is made to act on the turning scroll 3. |
