Planetary transmission

Patent metadata

Field	Value
Publication number	US-10844905-B2
Application number	US-201716330248-A
Country	US
Kind code	B2
Filing date	Aug 22, 2017
Priority date	Sep 2, 2016
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A planetary transmission for a wind turbine includes a transmission housing, a central sun gear which has an outer toothing, a ring gear which has an inner toothing, a one-sided planetary carrier, and multiple planetary gears mounted on the planet carrier via a planetary gear bearing configured as a sliding bearing such that they can rotate about planetary gear rotational axes and that have outer toothings that engage with the inner toothing of the ring gear and the outer toothing of the sun gear, where every planetary gear bearing has two annular bearing bodies penetrated by a planetary gear shaft and rotationally fixed thereon and have conical sliding surfaces on the outer circumferential surfaces thereof such that tapered ends of the bearing bodies point towards one another, and where surfaces corresponding to the sliding surfaces of the planetary gear bearing are formed on inner circumferential surfaces of the planetary gear.

First claim

The invention claimed is:

1. A planetary transmission for a wind turbine, comprising:
a transmission housing;
a central sun gear retained in the transmission housing, said central sun gear rotating about a central transmission rotational axis and having an outer toothing;
a ring gear arranged concentrically in relation to the central transmission rotational axis in the transmission housing and having an inner toothing,
a one-sided planetary carrier mounted in the transmission housing, said one-sided planetary carrier rotating about the central transmission rotational axis;
a plurality of planetary gears mounted on the one-sided planetary carrier via a planetary gear bearing configured as a sliding bearing such that said plurality of planetary gears rotate about the planetary gear rotational axis, said plurality of planetary gears having outer toothings which that engage with an inner toothing of the ring gear and an outer toothing of the central sun gear; and
a lubrication gap between the conical sliding surfaces of the planetary gear bearing and the corresponding running surfaces of the supported planetary gear;
wherein each planetary gear bearing has two annular bearing bodies, at least one of the annular bearing of the two annular bearing bodies being penetrated by a planetary gear shaft and being rotationally fixed on the planetary gear shaft, and each planetary gear bearing has conical sliding surfaces formed on the outer circumferential surfaces of the annular bearing bodies such that tapered ends of the annular bearing bodies point towards one another;
wherein running surfaces corresponding to the conical sliding surfaces of the planetary gear bearing are formed on inner circumferential surfaces of the planetary gear; and
wherein a first lubrication gap of lubrication gaps is different from a second of said lubrication gaps.

2. The planetary transmission as claimed in claim 1 , further comprising:
a first end face side; and
a second end face side;
wherein the one-sided planetary carrier is arranged in the area of the first end face side;
wherein the at least one annular bearing body, which is penetrated by the planetary gear shaft and is rotationally fixed on the planetary gear shaft, is mechanically decoupled on the second end face side from a further planetary gear.

3. The planetary transmission as claimed in claim 1 , wherein the annular bearing bodies are arranged axially spaced from one another.

4. The planetary transmission as claimed in claim 2 , wherein the annular bearing bodies are arranged axially spaced from one another.

5. The planetary transmission as claimed in claim 1 , further comprising:
a retaining ring which retains at least one annular bearing body on the planetary gear shaft.

6. The planetary transmission as claimed in claim 1 , wherein the planetary gear shaft is a flex pin with a hollow cylinder.

7. The planetary transmission as claimed in claim 6 , wherein the flex pin has a lubrication line.

8. The planetary transmission as claimed in claim 6 , wherein the first lubrication gap and second lubrication gap have a different axial length.

9. The planetary transmission as claimed in claim 1 , wherein at least one of the lubrication gaps has axially different heights.

10. The planetary transmission as claimed in claim 8 , wherein at least one of the lubrication gaps has axially different heights.

11. The planetary transmission as claimed in claim 1 , wherein the first lubrication gap has a different inclination relative to the planetary gear rotational axis of the planetary gear than the second lubrication gap.

12. The planetary transmission as claimed in claim 8 , wherein the first lubrication gap has a different inclination relative to the planetary gear rotational axis of the planetary gear than the second lubrication gap.

13. The planetary transmission as claimed in claim 9 , wherein the first lubrication gap has a different inclination relative to the planetary gear rotational axis of the planetary gear than the second lubrication gap.

14. The planetary transmission as claimed in claim 1 , wherein at least one bearing body is adjustable in the axial direction to set a lubrication gap having a defined height between the conical sliding surfaces of the planetary gear bearing and the corresponding running surfaces of the supported planetary gear.

15. The planetary transmission as claimed in claim 1 , wherein precisely one annular bearing body, of the two annular bearing bodies, is adjustable and another bearing body of the two annular bearing bodies has an axially fixed position.

16. The planetary transmission as claimed in claim 15 , wherein the axially fixed position of the axially fixed annular bearing body is defined by an axial stop.

17. The planetary transmission as claimed in claim 16 , wherein the axial stop comprises a radial ring shoulder of the planetary carrier formed on the planetary gear shaft.

18. The planetary transmission as claimed in claim 15 , wherein the adjustable bearing body of the two annular bearing bodies is assigned an adjuster for axial adjustment.

19. The planetary transmission as claimed in claim 16 wherein the adjustable bearing body of the two annular bearing bodies is assigned an adjuster for axial adjustment.

20. The planetary transmission as claimed in claim 18 , wherein the adjuster comprises distance elements which are arranged between at least one of (i) a bearing body and a neighboring flange of the planetary carrier and (ii) between the annular bearing bodies.

21. The planetary transmission as claimed in claim 15 , wherein the adjustable bearing body of the annular bearing bodies of the two annular bearing bodies is screwed to the planetary gear shaft.

22. The planetary transmission as claimed in claim 18 , wherein the adjustable bearing body of the two annular bearing bodies is screwed into the neighboring flange of the planetary gear carrier.

23. The planetary transmission as claimed in claim 21 , further comprising:
a torsion proofing via which the adjustable bearing body of the two annular bearing bodies is axially fixable.

24. The planetary transmission as claimed in claim 22 , further comprising:
a torsion proofing via which the adjustable bearing body of the two annular bearing bodies is axially fixable.

25. The planetary transmission as claimed in claim 1 , wherein at least one lubrication pocket is formed in each conical sliding surface, into which a lubrication channel opens out, which radially penetrates the annular bearing bodies; and wherein the lubrication channel is connected to an eccentric lubricant feed channel which is formed in the planetary gear shaft and axially penetrates said shaft.

26. The planetary transmission as claimed in claim 1 , further comprising:
a distance ring arranged between the annular bearing bodies, distance ring surrounding the planetary gear shaft and defining a minimum axial spacing between the annular bearing bodies.

27. The planetary transmission as claimed in claim 26 , further comprising:
an annular lubrication collection groove formed on an inner circumferential surface of the distance ring.

28. The planetary transmission as claimed in claim 27 , wherein a plurality of lubrication channels, which open out into the lubrication collection groove, are formed in the distance ring.

29. The planetary tran

Assignees

• Flender Gmbh

Inventors

• Meyer Thomas

Classifications

• F03D15/00

  Transmission of mechanical power · CPC title

• F16C33/1055 Primary

  from radial inside, e.g. via a passage through the shaft and/or inner sleeve · CPC title

• F16C25/02

  Sliding-contact bearings · CPC title

• F16H57/0486

  with fixed gear ratio  (axle or inter-axle differentials F16H57/0483) · CPC title

• F16H2057/085

  Bearings for orbital gears · CPC title