| 摘要 |
PURPOSE:To support a radial component while allowing said component to be balanced in response to its change by providing a bearing piece opposing and adjoining to a balance piston. CONSTITUTION:A selected high pressure fluid acts on a balance piston 16a through an introducing hole to press this balance piston 16a onto the outer peripheral surface of one end 5a of a driving shaft 5 together with the action of spring force of a spring 36a via a bearing piece 17a. The high pressure fluid acting on the balance piston 16a is supplied between slide surfaces located between the bearing piece 17a and the outer peripheral surface of the one end 5a of the driving shaft 5 from a feed hole 33a, via a penetration hole 34a and a recess part 17a2 of the bearing piece 17a, in order to support a radial component acting upward perpendicularly to the driving shaft 5. When the radial component is reduced, the pressing force by the balance piston 16a and fluid pressure to the slide surfaces are also reduced to be always balanced with the radial component. |
