Rotor hub assembly, electric fan

Patent metadata

Field	Value
Publication number	US-10107301-B2
Application number	US-201414910730-A
Country	US
Kind code	B2
Filing date	Aug 7, 2014
Priority date	Aug 9, 2013
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

The invention relates to a rotor hub assembly for an electric fan, in particular for a radiator fan of a motor vehicle, comprising a hub cup, which rotates during operation and which has air outlet guides on the inside of the hub cup, which air outlet guides are arranged and shaped in such a way that the air outlet guides guide and accelerate cooling air, wherein a magnetic return cup is arranged inside the hub cup, which return cup has air passage openings, which, together with the air outlet guides, form continuous air outlets for a cooling air flow from the pressure side to the vacuum side of the fan. The invention further relates to an electric fan having such a rotor assembly.

First claim

The invention claimed is:

1. A rotor hub arrangement for an electric fan, comprising a hub cup which rotates during operation and comprises air escape guides on the inside thereof which are arranged and shaped in such a way that they guide and accelerate cool air, wherein a feedback cup is arranged inside the hub cup and comprises air passage openings which, together with the air escape guides, form continuous air outlets for a cool airflow from the pressure side to the underpressure side of the fan, wherein the air escape guides comprise ribs extending between the base of the hub cup and the feedback cup and the ribs extend in an arc shape in the radial and circumferential direction.

2. The arrangement of claim 1 , wherein the air passage openings and air escape guides are formed in such a way that at least some of the cool air is released in the radial direction.

3. The arrangement of claim 1 , wherein the air escape guides are formed in the manner of an impeller.

4. The arrangement of claim 1 , wherein the ribs extend in the radial direction.

5. The arrangement of claim 1 , wherein the feedback cup is made of a metal material or wherein the hub cup is made of a non-metal material.

6. The arrangement of claim 1 , wherein the feedback cup is coupled to the hub cup for conjoint rotation in a predetermined position relative to the hub cup.

7. The arrangement of claim 1 , wherein the feedback cup comprises a base which has a circumferential shoulder orientated towards the hub cup, the air passage openings being arranged in the region of the shoulder or extending radially outwards from the shoulder.

8. The arrangement of claim 1 , wherein each air outlet comprises a recess which forms a blade face of the air escape guide extending towards circumferential wall of the hub cup.

9. The arrangement of claim 1 , wherein the air outlet is formed having an axial elevation, orientated circumferentially in the direction of rotation with respect to the air outlet, and an axial depression orientated circumferentially counter to the direction of rotation with respect to the air outlet.

10. The arrangement of claim 1 , wherein the feedback cup comprises a plurality of different types and sizes of cavities which enlarge radially at a constant opening angle or clearances for forming spokes.

11. The arrangement of claim 1 , wherein cavities are formed in the centre of the base of the feedback cup as axial air passage openings, and cavities are provided in the centre of the base of the hub cup and are formed as axial air escape guides and which, together with the axial air passage openings, form continuous axial air outlets for releasing cool air in the axial direction.

12. An electric fan comprising an electric motor, having a pressure side and an underpressure side, wherein the fan comprises a rotor hub arrangement for an electric fan, comprising a hub cup which rotates during operation and comprises air escape guides on the inside thereof which are arranged and shaped in such a way that they guide and accelerate cool air, wherein a feedback cup is arranged inside the hub cup and comprises air passage openings which, together with the air escape guides, form continuous air outlets for a cool airflow from the pressure side to the underpressure side of the fan and wherein the fans is formed and configured so as to convey air from the underpressure side to the pressure side.

13. The fan of claim 12 , wherein an inlet opening is provided on the pressure side for the cool airflow from the pressure side to the underpressure side.

14. A rotor hub arrangement for an electric fan, comprising a hub cup which rotates during operation and comprises air escape guides on the inside thereof which are arranged and shaped in such a way that they guide and accelerate cool air, wherein a feedback cup is arranged inside the hub cup and comprises air passage openings which, together with the air escape guides, form continuous air outlets for a cool airflow from the pressure side to the underpressure side of the fan, wherein the air escape guides each form a substantially radially orientated air outlet in the hub cup and the air outlet is formed countersunk in a depression in a base of the hub cup or is formed in a clearance in the circumferential wall of the hub cup.

Assignees

• Brose Fahrzeugteile
• Brose Fahrzeugteile Gmbh & Co Kg Wurzburg

Inventors

• Evers Andre
• Rohm Franziska
• Gass Alexander
• Dresbach Sascha
• Schafer Tilman

Classifications

• F04D29/281 Primary

  for fans or blowers · CPC title

• F04D29/584

  cooling or heating the machine (F04D29/5846, F04D29/5853 take precedence) · CPC title

• H02K9/06

  with fans or impellers driven by the machine shaft · CPC title

• F04D29/288 Primary

  Part of the wheel having an ejecting effect, e.g. being bladeless diffuser · CPC title

• F04D29/5806 Primary

  Cooling the drive system · CPC title