Flow rectifier of a fan

Patent metadata

Field	Value
Publication number	US-11047394-B2
Application number	US-201715683114-A
Country	US
Kind code	B2
Filing date	Aug 22, 2017
Priority date	Aug 23, 2016
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

The present disclosure relates to a current rectifier for being arranged on the suction area of a ventilator, with an axial initial flow side and an axial exit flow side, wherein the current rectifier comprises several crossing struts formed by at least one circumferential strut and by at least one radial strut, and a pressure measuring conduit is constructed at least in one of the struts and which comprises at least one opening facing the exit flow side, and wherein the pressure measuring conduit comprises a measuring opening for being connected to a measuring line for the connection to a pressure sensor or a pressure sensor is integrated in the pressure measuring conduit.

First claim

The invention claimed is:

1. A current rectifier configured for being arranged at a suction area of a ventilator, the ventilator having an axial inlet flow side and an axial exit flow side, wherein the current rectifier comprises a plurality of crossing struts formed by at least one circumferential strut and at least one radial strut, and a pressure measuring conduit is constructed in at least one of the at least one circumferential strut and the at least one radial strut, the pressure measuring conduit having at least one strut opening facing in a direction towards the axial exit flow side of the ventilator, and wherein the current rectifier comprises at least one of:
a connection piece connected to the pressure measuring conduit and having a measuring opening for connecting a hose and an external pressure sensor to the pressure measuring conduit; and
an internal pressure sensor integrated into the pressure measuring conduit.

2. The current rectifier according to claim 1 , wherein the pressure measuring conduit comprises several uniformly distributed strut openings facing in the direction towards the axial exit flow side.

3. The current rectifier according to claim 1 , wherein the pressure measuring conduit is circumferential and annular.

4. The current rectifier according to claim 3 , wherein the current rectifier comprises a plurality of circumferential struts, and wherein the pressure measuring conduit is constructed in a radially outermost circumferential strut of the plurality of circumferential struts.

5. The current rectifier according to claim 3 , wherein the at least one strut opening facing in the direction towards the axial exit flow side is constructed as a plurality of slots.

6. The current rectifier according to claim 1 , wherein the at least one radial strut is constructed as a hollow strut with a hollow space and includes at least one strut opening facing in the direction towards the axial exit flow side.

7. The current rectifier according to claim 6 , wherein the current rectifier comprises a plurality of radial struts constructed as hollow struts with hollow spaces of which extend into an axial center of the current rectifier, and wherein the hollow spaces of each of the hollow struts are connected at the axial center of the current rectifier by a hollow annular element.

8. The current rectifier according to claim 1 , wherein the current rectifier is constructed in a bipartite manner by a first partial element and a second partial element.

9. The current rectifier according to claim 8 , wherein the pressure measuring conduit includes at least one circumferential strut constructed partially in the first partial element and partially in the second partial element and forms a through-pressure measuring space by connecting the first and the second partial elements.

10. The current rectifier according to claim 1 , wherein the measuring opening of the connection piece receives the hose that is connected to the external pressure sensor.

11. A ventilator comprising:
an axial inlet flow side defining a suction area and an axial exit flow side; and
a current rectifier fastened to the ventilator at the suction area, the current rectifier having a plurality of crossing struts formed by at least one circumferential strut and at least one radial strut, wherein a pressure measuring conduit is constructed in at least one of the at least one circumferential strut and the at least one radial strut, the pressure measuring conduit having at least one strut opening facing in a direction towards the axial exit flow side, and wherein the current rectifier comprises at least one of:
a connection piece connected to the pressure measuring conduit and having a measuring opening for connecting a hose and an external pressure sensor to the pressure measuring conduit; and
an internal pressure sensor integrated into the pressure measuring conduit.

12. The ventilator according to claim 11 , wherein the pressure measuring conduit is circumferential and annular.

13. The ventilator according to claim 12 , wherein the current rectifier comprises a plurality of circumferential struts, and wherein the pressure measuring conduit is constructed in a radially outermost circumferential strut of the plurality of circumferential struts.

14. The ventilator according to claim 11 , wherein the at least one radial strut is constructed as a hollow strut with a hollow space and includes at least one strut opening facing in the direction towards the axial exit flow side.

15. The ventilator according to claim 14 , wherein the current rectifier comprises a plurality of radial struts constructed as hollow struts with hollow spaces of which extend into an axial center of the current rectifier, and wherein the hollow spaces of each of the hollow struts are connected at the axial center of the current rectifier by a hollow annular element.

16. The current rectifier according to claim 3 , wherein the at least one strut opening facing in the direction towards the axial exit flow side is constructed as a slot that extends completely circumferentially around the pressure measuring conduit.

17. The current rectifier according to claim 1 , wherein at least one of the at least one circumferential strut and the at least one radial strut defines the pressure measuring conduit and is entirely formed as a tubular member.

18. The ventilator according to claim 11 , wherein at least one of the at least one circumferential strut and the at least one radial strut defines the pressure measuring conduit and is entirely formed as a tubular member.

19. The current rectifier according to claim 1 , wherein the at least one strut opening is formed at a surface of at least one of the at least one circumferential strut and the at least one radial strut.

20. The ventilator according to claim 11 , wherein the at least one strut opening is formed at a surface of at least one of the at least one circumferential strut and the at least one radial strut.

Assignees

• Ebm Papst Mulfingen Gmbh & Co Kg

Inventors

• Haaf Oliver
• Heli Thomas
• Gebert Daniel

Classifications

• F05D2230/53

  by integrally manufacturing a component, e.g. by milling from a billet or one piece construction · CPC title

• F04D29/703

  specially for fans, e.g. fan guards · CPC title

• F05D2270/301

  Pressure · CPC title

• F04D27/001 Primary

  Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring · CPC title

• F04D29/325

  for axial flow fans (blade mountings F04D29/34, blades F04D29/38) · CPC title