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1. (WO2018158112) PUMP ASSEMBLY

Pub. No.:    WO/2018/158112    International Application No.:    PCT/EP2018/054166
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Wed Feb 21 00:59:59 CET 2018
IPC: F04C 3/08
F01C 21/02
Applicants: ROBERT BOSCH GMBH
Inventors: STIER, Hubert
Title: PUMP ASSEMBLY
Abstract:
Already known are pump assemblies having a drive shaft and a rotatably mounted rotor driven by the drive shaft, wherein the drive shaft has a skewed sliding surface on an end face, which allows the rotor to wobble by means of the rotor axis thereof during rotation of the drive shaft about a drive axis of the drive shaft, wherein the drive shaft has a first bearing portion facing the rotor and a second bearing portion facing away from the rotor, wherein the first bearing portion of the drive shaft is arranged in a first slide bearing and the second bearing portion is arranged in a second slide bearing, spaced apart from the first slide bearing in the axial direction relative to the drive axis. The two slide bearings are formed integrally on a housing. In the pump assembly according to the invention, the bearing play in the slide bearings is reduced and the service life of the pump assembly is thereby increased. According to the invention, the first slide bearing (11) and the second slide bearing (12) are formed on a common bearing sleeve (15), which is arranged as a separate component in a housing (16) of the pump assembly (1).