Patent · US Active

Electric pump supported by journal bearings

US10151312B2 · kind B2 · utility

0Cited by

2References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Evgenij Skrynski · Stuttgart, DE
Marian Kacmar · Esslingen am Neckar, DE
Martin Kling · Uppsala, SE
Oliver Laforsch · Stuttgart, DE
Sando Kunath · Stuttgart, DE

Key dates

Filing date	Jul 22, 2015
Grant date	Dec 11, 2018
Priority date	—
Expiry date	Jul 22, 2035

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C2240/60
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Pump units include a rotatably arranged rotor (3) that is driven by a drive shaft (2), wherein the drive shaft (2) has a first bearing section (18) facing towards the rotor (3), and a second bearing section (19) facing away from the rotor (3). The first bearing section (18) is a first sliding bearing (20), and the second bearing section (19) is a second sliding bearing (21). The load-bearing capacity of the first sliding bearing (20) is limited by a predetermined working pressure in the pump unit. In the pump unit according to the invention, the load-bearing capacity of the sliding bearing (20) facing towards the rotor (3) is increased. According to the invention, the diameter of the first bearing section (18) of the drive shaft (2) and the first sliding bearing (20) is larger than the diameter of the second bearing section (19) and the second sliding bearing (21).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.