Device for driving a compressor and method for assembling the device

Patent metadata

Field	Value
Publication number	US-11713754-B2
Application number	US-201916508433-A
Country	US
Kind code	B2
Filing date	Jul 11, 2019
Priority date	Jul 11, 2018
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

The invention relates to a device for driving a compressor of a vaporous fluid, particularly an electric motor. The device has a rotor and a stator, which are extended along a common longitudinal axis, as well as an insulation element. The insulation element is designed as a single part and connected with a stator core of the stator in a form-fitting manner such that the stator core and the insulation element form an integral and single-part component of the stator. The invention further relates to a method for producing a stator of the device, particularly the stator core with the insulation element.

First claim

What is claimed is:

1. A device for driving a compressor of a vaporous fluid comprising:
an electric motor having a rotor and a stator, which are arranged extending along a common longitudinal axis; and
an insulation element, wherein the insulation element is formed as a single piece and connected in a form-fitting manner with a stator core of the stator such that the stator core and the insulation element form an integral and single-piece component of the stator, wherein the stator core and the insulation element are formed and arranged extending along the longitudinal axis from a first front side to a second front side of the stator, a support element arranged on the first front side of the stator and a cover element arranged on the second front side of the stator, and wherein the insulation element is formed with a first guiding contour and a second guiding contour, wherein a first area of the insulation element protrudes from the stator core in an axial direction thereof at the first front side of the stator, wherein the first area of the insulation element is formed as a substantially cylinder-shaped wall having a mounting area formed in a shape of a chamber for mounting connections of conducting wires as well as a casting compound for sealing off a connection point of the conducting wires, wherein the mounting area has an opening in the circumferential direction of the stator for inserting ends of the conducting wires into the mounting area, and wherein the mounting area is disposed along an outer surface of the substantially cylinder-shaped wall with the chamber disposed radially outwardly of the cylindrical-shaped wall with respect to a radial direction of the stator.

2. The device according to claim 1 , wherein the insulation element is formed as a mold of the stator core resting against an inner surface of an outer wall of the stator core.

3. The device according to claim 1 , wherein the first area of the insulation element protruding from the stator core is formed so as to cover at least 60% of a front surface of the stator core at the first front side of the stator.

4. The device according to claim 1 , wherein a second area of the insulation element protruding from the stator core at the second front side of the stator has an outer diameter which is greater than an inner diameter of an outer wall of the stator core.

5. The device according to claim 1 , wherein an outer radius of the stator core is no more than 1 mm greater than an outer radius of a second area of the insulation element protruding from the stator core at the second front side of the stator.

6. The device according to claim 1 , wherein the stator core is formed with bars for mounting the conducting wires wound into coils.

7. The device according to claim 6 , wherein the bars are arranged uniformly distributed about a circumference of an inner side of an outer wall of the stator core.

8. The device according to claim 6 , wherein the insulation element is arranged between the conducting wires of the coils and the stator core with the bars.

9. The device according to claim 8 , wherein the first guiding contour is formed at least on surfaces of each of the bars and the second guiding contour is formed on a second area of the insulation element protruding from the stator core at the second front side of the stator, the surfaces being aligned in an axial direction of the stator.

10. The device according to claim 6 , wherein the insulation element is formed extending in an axial direction of the stator on ends of the bars, which are aligned inward in the radial direction of the stator and outward in the axial direction of the stator.

11. The device according to claim 10 , wherein the bars of the stator core are formed protruding from the insulation element with a front side aligned inward in the radial direction of the stator.

12. The device according to claim 11 , wherein an intermediate space is formed between every two of the bars, which are arranged adjacent to one another with the insulation element shaped about the bars.

13. The device according to claim 12 , wherein each of the intermediate spaces is formed delimited by a base surface, two side surfaces, and two inner sides.

14. The device according to claim 13 , wherein the intermediate space is open in the axial direction of the stator as well as the radial direction of the stator.

15. The device according to claim 14 , wherein the base surface of the intermediate space is completely covered by the insulation element.

16. The device according to claim 15 , wherein the side surfaces of the intermediate space are completely covered by the insulation element.

17. The device according to claim 16 , wherein surfaces of the inner sides of the intermediate space are covered at least 50% by the insulation element.

18. The device according to claim 1 , wherein the stator core is formed with bars for mounting the conducting wires wound into coils, and wherein the first guiding contour is formed at least on surfaces of each of the bars and the second guiding contour is formed at least on one outer side of a wall of a second area protruding from the stator core at the second front side of the stator, the wall protruding over the stator core on the second front side of the stator in the axial direction.

19. The device according to claim 1 , wherein the cover element has the shape of an axially aligned hollow circular cylinder.

20. The device according to claim 19 , wherein the cover element rests completely against an outer side of a wall of a second area of the insulation element protruding from the stator core at the second front side of the stator, wherein a diameter of an inner surface of the cover element corresponds to a diameter of the wall of the second area of the insulation element.

21. The device according to claim 1 , wherein the cover element and the insulation element are formed to be connectable with one another in a form-fitting manner.

22. A method for producing the stator of the device for driving the compressor of the vaporous fluid according to claim 1 , wherein an insulating material is applied, in an injection-molding process, to intermediate spaces and contact surfaces for inner surfaces of an outer wall of the stator core, the inner surfaces extending from the first front side to the second front side in an axial direction of the stator and the inner surfaces being formed for the injection-molding process.

23. The method according to claim 22 , wherein the insulation element is formed so as to protrude over the stator core at the second front side of the stator.

24. The device according to claim 1 , wherein at least a portion of the mounting area is disposed radially outwardly of an inner surface of an outer wall of the stator core with respect to the radial direction of the stator.

Assignees

• Hanon Systems

Inventors

• Guntermann Bernd
• Walisko David
• Heinrichs Stephan

Classifications

• F04B35/04 Primary

  the means being electric · CPC title

• H02K3/345 Primary

  between conductor and core, e.g. slot insulation · CPC title

• F04C2240/40

  Electric motor · CPC title

• H02K15/10

  Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes · CPC title

• F04C23/008

  Hermetic pumps · CPC title