Pump device comprising a radial bearing

Patent metadata

Field	Value
Publication number	US-12092125-B2
Application number	US-202217673450-A
Country	US
Kind code	B2
Filing date	Feb 16, 2022
Priority date	Aug 16, 2019
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A pump device, in particular for a fluid circuit in a motor vehicle, comprising a housing, a drive, a rotor, a stator and a radial bearing, wherein the housing has an inlet, wherein the rotor comprises an impeller wheel, wherein the drive is designed to set the rotor in rotation relative to the stator, wherein the inlet is fluidly connected to the impeller wheel, wherein the rotor has a rotor cavity, wherein a section of the stator projects into the rotor cavity, and wherein the radial bearing is situated in the rotor cavity between the section of the stator and the rotor.

First claim

What is claimed is:

1. A pump for a fluid circuit in a motor vehicle, the pump comprising:
a housing;
a rotor;
a stator; and
a radial bearing,
wherein the housing has an inlet,
wherein the rotor comprises an impeller wheel,
wherein the rotor rotates relative to the stator about a longitudinal axis,
wherein the inlet is fluidly connected to the impeller wheel,
wherein the rotor has a rotor cavity that extends along the longitudinal axis,
wherein a section of the stator projects into the rotor cavity,
wherein, with respect to a radial direction of the longitudinal axis, the radial bearing is situated in the rotor cavity between the section of the stator and the rotor, such that an inner circumferential surface of the section of the stator is positioned closer to the longitudinal axis than an inner circumferential surface of the radial bearing, and
wherein the radial bearing has a first bearing region, a second bearing region and a third bearing region, wherein in the first bearing region, a first outer surface of the radial bearing has a first outer diameter and in the second bearing region, a second outer surface of the radial bearing has a second outer diameter that is smaller than the first outer diameter, and wherein the third bearing region connects the first bearing region to the second bearing region, such that the third bearing region has a sloped outer surface that extends from the first outer surface having the first outer diameter to the second outer surface having second outer diameter that is smaller than the first outer diameter.

2. The pump according to claim 1 , wherein the stator has a stator cavity, wherein the stator cavity is surrounded by the section of the stator, and wherein the stator cavity is fluidly connected to the rotor cavity.

3. The pump according to claim 2 , wherein the stator cavity and/or the rotor cavity are free of a shaft.

4. The pump according to claim 2 , wherein the pump comprises a vent outlet, wherein the vent outlet is fluidly connected to the rotor cavity so that air flows from the stator cavity through the rotor cavity to the vent outlet.

5. The pump according to claim 1 , wherein the section of the stator projects into the rotor cavity at a first end of the rotor, wherein the impeller wheel is disposed at a second end of the rotor, and wherein the second end is disposed opposite the first end.

6. The pump according to claim 1 , wherein the section of the stator has a first region and a second region, wherein the section of the stator has a third outer diameter in the first region and a fourth outer diameter in the second region, and wherein the fourth outer diameter is smaller than the third outer diameter.

7. The pump according to claim 6 , wherein the first bearing region of the radial bearing and the first region of the section of the stator partially overlap in the radial direction and wherein the second bearing region of the radial bearing and the second region of the section of the stator partially overlap in the radial direction.

8. The pump according to claim 1 , wherein the pump comprises a bearing situated between the impeller wheel and the housing.

9. The pump according to claim 8 , wherein the bearing axially supports the rotor.

10. The pump according to claim 9 , wherein the housing has an annular groove and the impeller wheel has an annular projection which projects into the annular groove, and wherein the bearing is situated between the annular projection and the housing.

11. The pump according to claim 8 , wherein the bearing radially supports the rotor.

12. The pump according to claim 11 , wherein the bearing has an L-shaped cross-sectional area.

13. The pump according to claim 1 , wherein the pump comprises an outlet, wherein the impeller wheel causes a fluid flow from the inlet to the outlet when the rotor rotates.

14. A motor vehicle, comprising the pump according to claim 1 and a fluid circuit, wherein the pump pumps a fluid in the fluid circuit.

Assignees

• Hella Gmbh & Co Kgaa

Inventors

• Cordes Martin
• Doering Oliver
• Geue Ingo
• Grothe Benjamin
• Hueser Theodor
• Niess Dominik
• Schulte Christoph
• Schulte Stefan
• Theodossiadis Georgios Dimitrios
• Vergers Christopher
• Von Chamier-Cieminski Andreas
• Zimmer Mario

Classifications

• F05D2240/61

  Hollow · CPC title

• F04D9/003

  separating and removing the vapour · CPC title

• F04D13/0626 Primary

  Details of the can · CPC title

• F04D13/0633

  Details of the bearings · CPC title

• F04D29/4206

  especially adapted for elastic fluid pumps · CPC title