| 摘要 |
<p>A rotor-type pump comprises a drive shaft, a pump housing with a circumferentially-extending peri-trochoidal curved surface in the outer periphery thereof, an eccentric rotor journal fixedly connected to the drive shaft, a rotor slidably fitted to the eccentric rotor journal and having circumferentially equi-distant spaced three lobes on its outer periphery so that the rotor rotates eccentrically, keeping the lobes in sliding-contact with the peri-trochoidal curved surface, three working-fluid chambers defined between respective two adjacent lobes and rotating in synchronization with rotation of the rotor, intake and discharge ports provided in the housing to input low-pressure incompressible fluid and to output high-pressure fluid, and a communication passage formed in the housing for properly intercommunicating a first working-fluid chamber decreasing in volume during compression stage and a second working-fluid chamber increasing in volume during expansion stage to permit flow of incompressible fluid from the first chamber to the second chamber. <IMAGE></p> |
