| 摘要 |
<p>The invention a rotary displacement pump including a stator (42) fixed in a housing (20) a rotor including a shaft portion (8) and a radially protruding web (12) having a configuration of an undulatory disk type; a scraper (110) having an engagement slot (112) of predetermined radial height and predetermined axial width, the engagement slot (112) engaging said protruding web (12) of said rotor; a guide (92) retains and scraper (110), configuration of a recessed plate and being - directly or indirectly - fixed in said housing (20), wherein the guide (92) retains said scraper (110) in circumferential direction and allows said scraper (110) a reciprocating movement in substantially axial direction; said scraper (110), including - a first groove (120) having a predetermined depth and extending along its radially outer edge surface, - and a second groove (124) and a third groove each having a predetermined depth and extending in radial direction along one front edge surface and along another front edge surface, respectively, of said scraper (110), said three grooves (120, 124) being designed such that they accommodate a portion of said guide (92) and allow said reciprocating movement of said scraper (110) in said substantially axial direction.</p> |
