| 摘要 |
<p>PURPOSE:To uniformalize the discharge quantity of each cylinder by providing plural fluid paths for communicating a discharge opening with a cylinder in the process of a discharge stroke, and communicating the fluid path put in the state of communicating with the cylinder in the process of a discharge stroke with a communicating chamber when a working fluid is discharged from the discharge opening. CONSTITUTION:The above pump is constructed so that a rotor 4 is rotatably installed using a pintle valve 8 fixed on a front housing 6 by a bolt as a shaft 8, and plungers 10a 10d built in the rotor 4 in such a manner as to freely advance and retreat radially are forced to reciprocate in cooperation with a cam ring 55 by the rotation of the rotor 4 to pressurize a fluid taken in from an inlet 22 and discharge the same from a discharge opening 21a. In this case, pressure guide grooves 30, 31 as communicating chambers are formed on the surface of the pintle valve 8, and discharge passages 18a-18d and communicating holes 17a-17d are provided as a part of the fluid path in the interior of the pintle valve 8. Further, pressure introduction paths 23a-23d communicating with cylinders 9a-9d are provided on the rotor 4.</p> |
