Insulated pitch tube

Patent metadata

Field	Value
Publication number	US-12276255-B2
Application number	US-202017642713-A
Country	US
Kind code	B2
Filing date	Aug 17, 2020
Priority date	Sep 20, 2019
Publication date	Apr 15, 2025
Grant date	Apr 15, 2025

Abstract

An arrangement includes a transmission, a pitch tube, and a fixation device configured to affix the pitch tube in the transmission. The fixation device is electrically insulated from the pitch tube. The pitch tube can be axially movable relative to the fixation device. The pitch tube can be fixed in a shaft or a rotatably-mounted planet carrier of the transmission by the fixation device.

First claim

The invention claimed is:

1. An arrangement, comprising:
a transmission part,
a pitch tube, and
a fixation device configured to affix the pitch tube to the transmission part, the fixation device including a base body and an electrical non-conductor,
wherein the fixation device is electrically insulated from the pitch tube by the electrical non-conductor, and
wherein the electrical non-conductor is arranged in its entirety between the transmission part and the base body of the fixation device.

2. The arrangement according to claim 1 , wherein the pitch tube is axially movable relative to the fixation device.

3. The arrangement according to claim 1 , wherein the transmission part includes a shaft or a rotatably mounted planet carrier, and wherein the pitch tube is fixed in the shaft or the rotatably-mounted planet carrier by the fixation device, and wherein the fixation device electrically insulates the pitch tube from the shaft or planet carrier.

4. The arrangement according to claim 1 , wherein the fixation device has a central, continuous hole, and wherein the fixation device is joined to the pitch tube in the hole.

5. The arrangement according to claim 3 , wherein the fixation device is joined along its radially outer edge to the shaft or planet carrier.

6. The arrangement according to claim 1 , wherein at least part of the base body is arranged radially between the pitch tube and the electrical non-conductor.

7. The arrangement according to claim 1 , further comprising a generator that is operatively connected to the transmission part so as to rotate.

8. The arrangement according to claim 7 , wherein a coupling connects an output shaft of the transmission to an input shaft of the generator, wherein the coupling is designed to be electrically insulating.

9. The arrangement according to claim 1 , wherein the base body extends between the pitch tube and the electrical non-conductor such that the electrical non-conductor does not contact the pitch tube.

10. The arrangement according to claim 1 , further comprising a lug, wherein the pitch tube comprises a radial recess and the lug is configured to be received in the radial recess of the pitch rube.

11. The arrangement according to claim 1 , comprising a first fastener and a second fastener,
wherein the first fastener is arranged to extend in an axial direction and configured to secure the base body, the electrical non-conductor, and the transmission part to one another, and
wherein the second fastener is arranged to extend in the axial direction and configured to directly secure the lug to the base body without extending entirely through the base body.

12. An arrangement, comprising:
a sun shaft with a first flange, the first flange extending radially relative to an axial extent of the sun shaft;
an input shaft of a generator, the input shaft forming a second flange extending radially relative to an axial extent of the input shaft;
a disk consisting of an electrical insulator arranged in its entirety between the first flange and the second flange such that the sun shaft and the input shaft are electrically insulated from one another; and
a fastener configured to secure the first flange and the second flange to one another through the disk,
wherein the fastener is encapsulated with a further electrical insulator.

Assignees

• Zahnradfabrik Friedrichshafen
• Zf Wind Powerantwerpen N V
• Vestas Wind Sys As
• Zf Wind Power Antwerpen Nv

Inventors

• Strasser Dirk
• Weist Dietmar
• Stoyanov Deyan
• Sperlich Ralf

Classifications

• F16H2057/02078

  for wind turbines · CPC title

• F16H57/029 Primary

  characterised by means for sealing the gearboxes, e.g. to improve airtightness · CPC title

• F16H15/52

  in which a member of uniform effective diameter mounted on a shaft may co-operate with different parts of another member · CPC title

• F05B2260/40

  Transmission of power · CPC title

• F03D80/85

  Cabling · CPC title