Pump apparatus, in particular magnetic coupling pump apparatus

Patent metadata

Field	Value
Publication number	US-11927192-B2
Application number	US-202217861298-A
Country	US
Kind code	B2
Filing date	Jul 11, 2022
Priority date	Jul 13, 2021
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

A pump apparatus has a rotor shaft, a pump impeller connected to the rotor shaft, at least one axial bearing which rotatably supports the rotor shaft at a side facing the pump impeller, a magnetic pump stator, a magnetic pump rotor which is connected to the rotor shaft, a containment can which extends between the stator and the rotor, and at least one central support element which is mounted in the region of the pump impeller. The pump apparatus has an elastomer disk which is arranged between the support element and the axial bearing. The stator and the rotor are arranged with an axial offset with respect to each other. The stator and the rotor are provided as a result of the axial offset to produce an axial force F in the direction of the elastomer disk.

First claim

The invention claimed is:

1. A magnetic coupling pump apparatus, having a rotor shaft ( 16 ), having a pump impeller ( 22 ) which is securely connected to the rotor shaft ( 16 ), having at least one axial bearing ( 18 ) which rotatably supports the rotor shaft ( 16 ) at a side facing the pump impeller ( 22 ), having a magnetic pump stator ( 42 ), having a magnetic pump rotor ( 44 ) which is connected to the rotor shaft ( 16 ) in a rotationally secure manner, having a containment can ( 30 ) which extends between the magnetic pump stator ( 42 ) and the magnetic pump rotor ( 44 ) and which at least partially closes a central pump space ( 28 ), and having at least one central support element ( 32 ) which is mounted in a region of the pump impeller ( 22 ) in a rotationally secure manner, characterized by an elastomer disk ( 36 ) which is arranged between the support element ( 32 ) and the axial bearing ( 18 ) and characterized in that the magnetic pump stator ( 42 ) and the magnetic pump rotor ( 44 ) are arranged with an axial offset (X) with respect to each other, whereby, as a result of the axial offset (X), the magnetic pump stator ( 42 ) and the magnetic pump rotor ( 44 ) produce an axial force F(ax, mag) in a direction of the elastomer disk ( 36 ) and a thrust washer ( 38 ) is arranged between the elastomer disk ( 36 ) and the axial bearing ( 18 ).

2. The pump apparatus according to claim 1 , characterized in that the offset (X) between the magnetic pump stator ( 42 ) and the magnetic pump rotor ( 44 ) is 1 mm.

3. The pump apparatus according to claim 1 , characterized in that in one operating state the pump impeller ( 22 ) is configured to generate an axial force F(ax, hyd) in the direction of the elastomer disk ( 36 ).

4. The pump apparatus according to claim 1 , characterized in that the elastomer disk ( 36 ) has a thickness of 1.5 mm.

5. The pump apparatus according to claim 3 , characterized in that the elastomer disk ( 36 ) is configured to be tensioned during operation as a result of the axial forces F(ax, mag), F(ax, hyd) active between the support element ( 32 ) and the thrust washer ( 38 ).

6. A method for operating the pump apparatus ( 10 ) according to claim 1 , having the magnetic pump stator ( 42 ), the magnetic pump rotor ( 44 ) and having the elastomer disk ( 36 ), characterized in that, as a result of the axial offset (X), the axial force F(ax, mag) is applied to the elastomer disk ( 36 ) and the elastomer disk ( 36 ) is thereby tensioned.

7. The pump apparatus according to claim 1 , wherein the axial force F(ax, mag) is exerted on the rotor shaft ( 16 ) in a direction toward the elastomer disk ( 36 ), and wherein the axial force F(ax, mag) is exerted on the elastomer disk ( 36 ) by the rotor shaft ( 16 ) via the axial bearing ( 18 ).

8. The pump apparatus according to claim 3 , wherein the axial force F(ax, hyd) is exerted on the rotor shaft ( 16 ) by the pump impeller ( 22 ), and wherein the axial force F(ax, hyd) is exerted on the elastomer disk ( 36 ) by the rotor shaft ( 16 ) via the axial bearing ( 18 ) and the thrust washer ( 38 ).

9. The pump apparatus according to claim 1 , wherein the axial force F(ax, mag) is exerted on the rotor shaft ( 16 ) in a direction toward the elastomer disk ( 36 ), and wherein the axial force F(ax, mag) is exerted on the elastomer disk ( 36 ) by the rotor shaft ( 16 ) via the axial bearing ( 18 ) and the thrust washer ( 38 ).

Assignees

• Bosch Gmbh Robert

Inventors

• Walter Johannes
• Muschelknautz Claudius
• Zierer Gerald
• Butscher Hannes
• Werny Pierre
• Herrmann Ralf
• Eckerle Thomas

Classifications

• F04D13/027 Primary

  Details of the magnetic circuit · CPC title

• F04D13/026

  Details of the bearings · CPC title

• F04D13/0633

  Details of the bearings · CPC title

• F04D13/064 Primary

  Details of the magnetic circuit · CPC title

• F04D29/041 Primary

  Axial thrust balancing · CPC title