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1. (WO2017152939) AUTOMOTIVE VACUUM PUMP

Pub. No.:    WO/2017/152939    International Application No.:    PCT/EP2016/054802
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Tue Mar 08 00:59:59 CET 2016
IPC: F01C 21/10
F04C 25/02
F04C 29/00
F04C 29/12
F04C 18/344
Applicants: PIERBURG PUMP TECHNOLOGY GMBH
Inventors: PERONI, Giorgio
SQUARCINI, Raffaele
ROMBACH, Michael
KUHNEKATH, Andreas
Title: AUTOMOTIVE VACUUM PUMP
Abstract:
The application refers to an automotive vacuum pump (10) for pumping a gas, comprising a pump housing (12) defining a pump cavity (11), a pump rotor body (16) with at least one vane slit (18) supporting a shiftable vane (20) defining at least two rotating pumping chambers, the pump rotor body (16) having an axial low-pressure end (15) and a axial high-pressure end (17), the low-pressure end (15) being axially supported by a closed housing wall (13), so that the gas pressure inside the rotating pumping chamber is present at the low-pressure end (15) of the pump rotor body (16), the pump housing (12) being fluidically open at the high-pressure end (17), so that atmospheric pressure is present at the high-pressure end (17) of the pump rotor body (16), a separate axial rotor retaining arrangement (50) defined by a separate retaining sheet body (53) arranged in a transversal plane and axially blocking at least partially the high-pressure end (17) of the pump rotor body (16), and a radial friction bearing (80) axially arranged between the at least on vane slit (18) and the high-pressure end (17) of the pump rotor body (16).