Diagonal fan with outlet guide vane device

Patent metadata

Field	Value
Publication number	US-2022106966-A1
Application number	US-201917275574-A
Country	US
Kind code	A1
Filing date	Oct 9, 2019
Priority date	Nov 16, 2018
Publication date	Apr 7, 2022
Grant date	—

Abstract

A diagonal fan has an electric motor, housing, and diagonal impeller, which is accommodated within the housing, can be driven via the electric motor, and generates a diagonal flow during operation that is deflected in an axial flow direction by an inner wall of the housing. Outlet guide vane device with a plurality of guide vanes distributed in the circumferential direction is arranged adjacently to the diagonal impeller when viewed in the axial flow direction, and homogenizes airflow generated by the diagonal impeller. vanes have a radial extension from a hub region of the outlet guide vane device to the housing. An imaginary extension in the outflow angle of the diagonal impeller strikes the inner wall of the housing at an axial distance K from the diagonal impeller. Outlet guide vane device is arranged at axial distance H to diagonal impeller where 0.75≤K/H≤1.25.

First claim

1 . A diagonal fan comprising an electric motor, a housing, and a diagonal impeller, which is accommodated within the housing and can be driven via the electric motor, the diagonal flow thereof generated during operation being deflected in an axial flow direction by an inner wall of the housing, wherein an outlet guide vane device with a plurality of guide vanes, which are distributed in the circumferential direction, is arranged adjacently to the diagonal impeller when viewed in the axial flow direction, the outlet guide vane device homogenizing an airflow generated by the diagonal impeller, wherein the guide vanes have a radial extension from a hub region of the outlet guide vane device to the housing, and wherein an imaginary extension in the outflow angle of the diagonal impeller strikes the inner wall of the housing at an axial distance K from the diagonal impeller, and the outlet guide vane device is arranged at an axial distance H to the diagonal impeller such that 0.75≤K/H≤1.25.

2 . The diagonal fan according to claim 1 , characterized in that the outlet guide vane device is formed as a single part with the housing.

3 . The diagonal fan according to claim 1 , characterized in that the outlet guide vane device has a protective grille extending over a blow-out portion of the diagonal fan, which protective grille has an axial length L, which is less than an axial length C of the outlet guide vane device, where L<0.5×C.

4 . The diagonal fan according to claim 3 , characterized in that the outlet guide vane device, the housing, and the protective grille are formed as a single part.

5 . The diagonal fan according to claim 3 , characterized in that the protective grille has a plurality of annular webs arranged coaxially as relates to each other, each of which form web surfaces which extend parallel to the axial flow direction and are opposite one another.

6 . The diagonal fan according to claim 1 , characterized in that the annular webs are formed to axially protrude in the region of the guide vanes as relates to a leading edge of the respective guide vanes.

7 . The diagonal fan according to claim 1 , characterized in that the guide vanes of the outlet guide vane device are curved in the shape of an arc and/or are profiled in the axial cross-section.

8 . The diagonal fan according to claim 1 , characterized in that the guide vanes of the outlet guide vane device are formed to curve three-dimensionally.

9 . The diagonal fan according to claim 1 , characterized in that the guide vanes of the outlet guide vane device directly merge into the protective grille.

10 . The diagonal fan according to claim 1 , characterized in that a maximum diameter G of the hub region of the outlet guide vane device is greater than a maximum diameter F of a hub of the diagonal impeller such that the hub region of the outlet guide vane device covers the hub of the diagonal impeller, as viewed in an axial projection.

11 . The diagonal fan according to claim 1 , characterized in that the outlet guide vane device has a motor mount for the electric motor in the hub region.

12 . The diagonal fan according to claim 1 , characterized in that the diagonal impeller has a slinger ring, which encloses the impeller blades distributed in the circumferential direction.

13 . The diagonal fan according to claim 12 , characterized in that the slinger ring establishes the outflow angle of the diagonal impeller.

14 . The diagonal fan according to claim 1 , characterized in that the electric motor is formed as an external rotor motor.

15 . The diagonal fan according to claim 1 , characterized in that it comprises an inlet nozzle, which is arranged on the housing on the intake side, and wherein the inlet nozzle extends into the slinger ring in the axial direction.

Assignees

• Ebm Papst Mulfingen Gmbh & Co Kg

Inventors

• Heli Thomas
• Guenther Joerg
• Riegler Peter
• Gebert Daniel

Classifications

• F04D29/703

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

• F04D29/384 Primary

  characterised by form · CPC title

• F04D29/441

  especially adapted for elastic fluid pumps · CPC title

• F04D29/325

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

• F04D29/44

  Fluid-guiding means, e.g. diffusers · CPC title