Fan directing element for an electric machine

Patent metadata

Field	Value
Publication number	US-10116188-B2
Application number	US-201415027618-A
Country	US
Kind code	B2
Filing date	Sep 12, 2014
Priority date	Oct 14, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

An electric machine having a stator and a rotor arranged on an axis of rotation and a first fan, which extends in the radial direction on one section of the axis of rotation and delivers a coolant flow into the electric machine during operation. The electric machine further includes a fan directing element, which interacts with the first fan and deflects at least a proportion of the coolant flow. Variable and demand-based cooling of the electric machine can be achieved by the fan directing element, which can in particular be adjustable.

First claim

The invention claimed is:

1. An electric machine comprising:
a stator,
a rotor, which is arranged on an axis of rotation,
a first fan, which extends on a portion of the axis of rotation in a radial direction and delivers a coolant flow into the electric machine during operation, and
a fan directing element which cooperates with the first fan and deflects at least one proportion of the coolant flow,
wherein the fan directing element projects radially inward behind blades of the first fan, and
wherein the fan directing element is adjustable, such that the at least one proportion of the coolant flow can be varied,
the electric machine further comprising:
a second fan, which extends on a portion of the axis of rotation in the radial direction and delivers a second coolant flow into the electric machine during operation, and
a second fan directing element which cooperates with the second fan and deflects at least one proportion of the second coolant flow.

2. The electric machine as claimed in claim 1 ,
wherein the fan directing element is embodied as a fan directing ring, which projects radially inward behind the blades of the first fan.

3. The electric machine as claimed in claim 1 ,
wherein the fan directing element comprises at least one guide channel in order to deflect the at least one proportion of the coolant flow.

4. The electric machine as claimed in claim 1 ,
wherein the stator comprises at least one stator winding.

5. The electric machine as claimed in claim 1 ,
wherein the first fan is a one-stage fan.

6. The electric machine as claimed in claim 1 ,
wherein the second fan directing element projects radially inward behind blades of the second fan.

7. The electric machine as claimed in claim 1 ,
wherein the second fan directing element is formed as a fan directing ring, which projects radially inward behind the blades of the second fan.

8. The electric machine as claimed in claim 6 ,
wherein the second fan directing element is adjustable, such that the at least one proportion of the second coolant flow can be varied.

9. The electric machine as claimed in claim 1 ,
wherein the electric machine is a generator or an electric motor or a three-phase motor.

10. The electric machine as claimed in claim 1 ,
wherein coolant of the coolant flow is a gaseous coolant, air, purified air, or hydrogen.

Assignees

• Siemens Ag

Inventors

• Grau Sorarrain Esteban
• Jäkel Christian
• Koebe Mario
• Kowalski Matthias
• Lehmann Christoph
• Mashkin Andrey
• Plotnikova Olga
• Schild Carolin

Classifications

• H02K2213/09

  Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators · CPC title

• H02K9/08

  by gaseous cooling medium circulating wholly within the machine casing (H02K9/10 takes precedence) · CPC title

• H02K9/06 Primary

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