| 摘要 |
PURPOSE:To permit smooth control for discharge flow-rate by connecting a movable ring with a pump housing by a flexible connecting piece and facilitating the displacement in the radial direction, at the position in a pump chamber where a discharge chamber is opposed, having the axis line of a rotor interposed. CONSTITUTION:A movable ring 14 is connected to a guide housing 12 by a flexible connecting body 24. When the revolution speed of a rotor 17 increases, and the discharge flow-rate of the pressurized fluid into the first pressure working chamber 15a increases, the movable ring 14 in the above-described constitution is slided rightward in the figure smoothly and free from lag of response against the pushing force of a spring 32 by the differential pressure generated between the first pressure working chamber 15a and the second pressure working chamber 15b. Therefore, the amount of eccentricity of the movable ring 14 with respect to the rotor 17 is reduced in accordance with the increase of the differential pressure, and the discharge amount of the pump is reduced, and the feeding amount of the pressurized fluid can be controlled to a constant value independently of the number of revolution of the pump. |
