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1. (WO2017055498) PUMP AND BLOCKING ELEMENT

Pub. No.:    WO/2017/055498    International Application No.:    PCT/EP2016/073338
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Fri Sep 30 01:59:59 CEST 2016
IPC: F01C 21/08
F04C 2/356
F04C 14/04
F04C 15/00
Applicants: WATSON MARLOW GMBH
Inventors: STAEDELE, Achim
MAYER, Eric
Title: PUMP AND BLOCKING ELEMENT
Abstract:
Pump (10) having a rotor (26) comprising a rotor hub (28) and a rotor collar (30) that extends from the rotor hub in the radial direction and encircles it in an undulating manner, a pump housing (16) which forms a pump duct (32) with the rotor, said pump duct connecting a first inlet/outlet space (44) to a second inlet/outlet space (46), and a blocking device (50) which is arranged between the first inlet/outlet space and the second inlet/outlet space and which comprises a blocking element (52) which blocks the pump duct in the axial direction on both sides of the rotor collar. The blocking device has a first seat (60) and a second seat (64) for the blocking element, wherein the spacing between the first seat and the second seat in the circumferential direction is greater than the spacing between a first contacting face (62) and a second contacting face (66) of the blocking element in the circumferential direction. Pump having a blocking device which comprises a chamber (54) formed in the pump housing, wherein the chamber and the blocking element are configured such that an exchange duct (58) is formed in the axial direction between an axially front fluid chamber and an axially rear fluid chamber on the opposite side of the rotor collar. A blocking element having an exchange duct (58) formed in the axial direction between the two opposite contacting faces (62, 66).