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1. (WO2018019587) EXTERNAL GEAR PUMP FOR A WASTE HEAT RECOVERY SYSTEM

Pub. No.:    WO/2018/019587    International Application No.:    PCT/EP2017/067536
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Thu Jul 13 01:59:59 CEST 2017
IPC: F04C 2/18
F04C 15/00
Applicants: ROBERT BOSCH GMBH
Inventors: RICHTER, Armin
BRANCZEISZ, Jakob
JANKOWSKI, Toni
Title: EXTERNAL GEAR PUMP FOR A WASTE HEAT RECOVERY SYSTEM
Abstract:
The invention relates to an external gear pump (1) having a pump housing (2). An inlet (2a), an outlet (2b), and a working chamber (6) are formed in the pump housing (2). A first gear (11), which is arranged on a first shaft (21), and a second gear (12), which is arranged on a second shaft (22), are arranged in the working chamber (6) in such a way that said first and second gears mesh with each other. The first shaft (21) is mounted in a first bearing bore (51) and in a second bearing bore (52). The second shaft (22) is mounted in a third bearing bore (53) and in a fourth bearing bore (54). During operation of the external gear pump (1), working medium can be conveyed from the inlet (2a) to the outlet (2b), wherein the working medium has a first pressure level in the inlet (2a) and a higher second pressure level in the outlet (2b). The four bearing bores (51, 52, 53, 54) are hydraulically connected to the second pressure level.