Fan with fan wheel and guide wheel

Patent metadata

Field	Value
Publication number	US-10428829-B2
Application number	US-201715786842-A
Country	US
Kind code	B2
Filing date	Oct 18, 2017
Priority date	Oct 19, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

The invention relates to a fan having a fan wheel (2) comprising fan blades (3), which fan wheel extends radially outwards about a rotational axis of the fan (1) and whose outer radial circumference defines a fan wheel diameter (Dv), and a stator (4) with air deflecting webs (5) disposed in the axial direction of flow at a distance (A) from the fan wheel (1), which stator extends radially outwards and has a stator diameter (Dl) that is smaller than the fan wheel diameter (Dv), such that the stator (4) defines a partial cross sectional area of a fan wheel cross sectional area.

First claim

The invention claimed is:

1. A fan having a fan wheel comprising fan blades, which fan wheel extends radially outwards about a rotational axis of the fan and whose outer radial circumference defines a fan wheel diameter (Dv), and a stator with air deflecting webs disposed in the axial direction of flow at a distance (A) from the fan wheel, which stator extends radially outwards and has a stator diameter (DI) that is smaller than the fan wheel diameter (Dv), such that the stator defines a partial cross sectional area of a fan wheel cross sectional area,
wherein the fan wheel comprises a fan wheel hub and an adjoining blade section that extends in a radial direction from the fan wheel hub to the outer circumference of the fan wheel, and in that the stator comprises a stator hub and an adjoining guide section that extends in a radial direction from said stator hub to the outer circumference of the stator, wherein the diameter ratio of the guide section to the blade section is in a range from 0.1 to 0.8, and wherein
the stator comprises an inner ring radially adjacent to the stator hub, which inner ring extends radially outwards in the axial direction of flow across the entire width (B) of the stator at an angle α of up to 60° relative to the rotational axis.

2. The fan according to claim 1 , wherein the diameter ratio of the guide section to the blade section is in a range from 0.2 to 0.5.

3. The fan according to claim 1 , wherein the stator has a width (B) in the axial direction of flow that is equivalent to 0.01 to 0.2 of the fan wheel diameter (Dv).

4. The fan according claim 3 , wherein the stator has a width (B) in the axial direction of flow that is in a range from 0.02 to 0.1 of the fan wheel diameter (Dv).

5. The fan according to claim 1 , wherein the distance (A) in the axial direction of flow between the fan wheel and the stator is in a range from 0.01 to 0.2, of the fan wheel diameter (Dv).

6. The fan according to claim 5 , wherein the distance (A) in the axial direction of flow between the fan wheel and the stator is in a range from 0.01 and 0.05 of the fan wheel diameter (Dv).

7. The fan according to claim 1 , wherein the stator comprises an outer circumferential ring on its outer radial circumference.

8. The fan according to claim 7 , wherein the outer circumferential ring has a radial thickness that is equivalent to 0.002 to 0.015 of the fan wheel diameter (Dv).

9. The fan according to claim 7 , wherein the outer circumferential ring completely surrounds the stator and is non-angular in axial cross section.

10. The fan according to claim 7 , wherein the outer circumferential ring extends radially outwards in the direction of flow at an angle β of 5-25° relative to the rotational axis.

11. The fan according to claim 7 , wherein the outer circumferential ring extends radially outwards in the direction of flow at an angle β of 5-10° relative to the rotational axis.

12. The fan according to claim 1 , wherein the stator hub extends radially outwards in the axial direction of flow at an angle α of up to 60° relative to the rotational axis.

13. The fan according claim 12 , wherein the angle α is greater than the angle β.

14. The fan according to claim 1 , wherein the stator hub and the outer circumferential ring together form a nozzle that has a flow cross section that diminishes in the direction of flow.

Assignees

• Ebm Papst Mulfingen Gmbh & Co Kg

Inventors

• Gebert Daniel
• Heli Thomas
• Kleinhanss Eugen
• Löber Ann-Kathrin

Classifications

• F04D29/542

  Bladed diffusers (fixing blades to stators F01D9/042) · CPC title

• F04D29/545

  Ducts · CPC title

• F04D19/002

  Axial flow fans · CPC title

• F04D29/544 Primary

  Blade shapes · CPC title

• F04D29/329 Primary

  Details of the hub · CPC title