POWERTRAIN MOUNTING FOR PLANETARY TRANSMISSION

Abstract

A powertrain for a wind power installation includes a main bearing unit with a main shaft, and a planetary transmission driven by the main shaft and including a transmission housing and a planetary stage which revolves about a rotation axis in the transmission housing. The planetary stage includes a planet carrier, a ring gear, and a sun gear, with the planet carrier or the ring gear being drivingly connected, at least indirectly, to the rotor. The planet carrier includes planet gears which revolve conjointly with the planet carrier and alternately mesh with the ring gear and the sun gear. At least three guide elements disposed circumferentially about the rotation axis are each operatively connected alternately to the transmission housing and a circumferential region of the planet carrier. Each guide element is constructed of multiple parts and includes guide jaws disposed on axial sides of the planet carrier, respectively.

Claims

1-15. (canceled)

16. A powertrain for a wind power installation driven by a rotor for torque-transmitting connection of the rotor to a generator, the power train comprising: a main bearing unit comprising a bearing housing and a main shaft; a planetary transmission driven by the main shaft, said planetary transmission comprising a transmission housing and at least one planetary stage which revolves about a rotation axis in the transmission housing, said at least one planetary stage comprising a planet carrier, a ring gear, and a sun gear, with the planet carrier or the ring gear being operatively connected, at least Indirectly, to the rotor, said planet carrier comprising a plurality of planet gears which revolve conjointly with the planet carrier and alternately mesh with the ring gear and the sun gear; and at least three guide elements disposed circumferentially about the rotation axis and each operatively connected alternately to the transmission housing and a circumferential region of the planet carrier, each of said guide elements constructed of multiple parts and comprising guide jaws disposed on axial sides of the planet carrier, respectively.

17. The powertrain of claim 16, wherein the circumferential region of the planet carrier interacting with the guide elements is disposed in an outer third of a radius of the planet carrier.

18. The powertrain of claim 16, wherein two of the guide elements are disposed in a region of a lower half of a circumference of the planet carrier.

19. The powertrain of claim 16, wherein the guide elements are designed to guide the planet carrier in axial and radial directions relative to the transmission housing.

20. The powertrain of claim 16, wherein at least one of the guide elements is designed to encompass the planet carrier in a radial direction on one of the axial sides of the planet carrier.

21. The powertrain of claim 16, wherein at least one of the guide elements is designed to encompass the planet carrier in a radial direction on both axial sides of the planet carrier.

22. The powertrain of claim 16, wherein the guide jaws are constructed of multiple parts comprising a first jaw part for guiding by impinging on an outer circumferential face of the planet carrier and a second jaw part for guiding by impinging on an axial lateral face of the planet carrier.

23. The powertrain of claim 22, wherein the guide jaws are constructed of two parts.

24. The powertrain of claim 22, wherein the first jaw part comprises a rotatably mounted guide roller.

25. The powertrain of claim 22, wherein the first jaw part forms a substantially radially extending oil channel.

26. The powertrain of claim 16, wherein at least one of the guide elements sits such as to be preloaded in a radial direction between the transmission housing and the planet carrier.

27. The powertrain of claim 16, wherein a connection between the bearing housing of the main bearing unit and the transmission housing, or between the main shaft of the main bearing unit and the planet carrier of the planetary stage, is embodied as a flexible connection.

28. The powertrain of claim 27, wherein the flexible connection is formed by a flange element between the bearing housing and the transmission housing, or by a flexible coupling element between the main shaft and the planetary stage.

29. A wind power installation, comprising: a rotor flange comprising a rotor; a generator; a machine support; and a powertrain held on the machine support and connecting the rotor flange to the generator, said powertrain being designed as set forth in claim 16.

30. A data agglomerate, comprising data packets combined in a common file or distributed among different files for depicting a three-dimensional design and/or interactions of all constituent parts in the powertrain of claim 16, said data packets being specified so as to carry out, during processing by a data processing device, additive manufacturing of the constituent parts of the planetary transmission of the powertrain.

31. The data agglomerate of claim 30, wherein the additive manufacturing is realized by 3D printing using a 3D printer and/or a simulation of the functioning of the powertrain.

Description

[0023] Below, the invention will be explained by way of example with reference to the appended drawings on the basis of preferred exemplary embodiments, wherein the features presented below may in each case individually or in combination represent an aspect of the invention. It is shown in:

[0024] FIG. 1: a schematic illustration of a wind power installation in one possible embodiment,

[0025] FIG. 2: a cross section through the transmission with two planetary stages,

[0026] FIG. 3: an axial view of the first planetary stage with guide elements,

[0027] FIG. 4: a detail of a guide element,

[0028] FIG. 5: an axial view of the first planetary stage with guide elements in further embodiments, and

[0029] FIGS. 6, 7a), 7b): show further details of the planetary stage in the region of the guide elements.

[0030] FIG. 1 shows, in a schematic illustration which is not true to scale, a wind power installation 100 in one possible embodiment. A substantial element of the wind power installation 100 is a powertrain 102, which in the present case structurally comprises a rotor flange 104 with a rotor 106, a main bearing unit 108, a transmission 110 and a generator 112. By way of a machine support 114, at least the main bearing unit 108 and the generator 112 are supported relative to the ground, which is not illustrated, by way of a tower 116.

[0031] The main bearing unit 108 comprises a main shaft 118 which is mounted by a rolling bearing assembly 16 so as to be rotatable about an axis of rotation D relative to a bearing housing 120 of the main bearing unit 108. The rotor flange 104 is held at one end of the main shaft 118 and the rotor 106 is held on the former. The other end of the main shaft 118 for driving is operatively connected to the transmission 110 by a coupling element 122 in order to introduce a drive torque applied by the rotor 106 into the transmission 110. The connection by the coupling element 122 is flexible or flexural The transmission 110 can be embodied as a planetary transmission with one or more planetary stages. The transmission 110 for driving is operatively connected to the generator 112 by a generator shaft 124. The bearing housing 120 is connected substantially rigidly to the transmission 110 by a flange element 126, A reaction torque of the transmission 110 is supported by the flange element 126 relative to the rotor bearing housing and moreover relative to the machine support 114.

[0032] In the embodiment of the wind power installation 100 shown in FIG. 1, the transmission housing 12 is linked substantially rigidly to the bearing housing 120 by way of the flange 126. In contrast, the transmission input shaft, for example a planet carrier, is flexibly linked to the main shaft 118 by way of the coupling element 122. In an alternative embodiment of the wind power installation 100, which is however not shown, the transmission housing 12 is linked flexibly or flexurally to the bearing housing 120, and the transmission input shaft, here also for example a planet carrier, is linked substantially rigidly to the main shaft 118.

[0033] FIG. 2 shows a cross section through the transmission 110, which in the present case is embodied with two planetary stages 14. The rigid link between the transmission housing 12 and the bearing housing 120 is shown here merely by way of example. The planetary transmission 10 comprises the transmission housing 12, in which two planetary stages 14 revolve about an axis of rotation Ap. Each planetary stage 14 has a planet carrier 16 and a ring gear 20. The planet carrier 16 for driving is operatively connected indirectly to the rotor 106, wherein the planet carrier 16 has a plurality of planet gears 18 which revolve conjointly with the planet carrier 16 and which alternately mesh with the ring gear 20 and a sun gear 22. The sun gear 22 of the first planetary stages is in turn for driving operatively connected to a planet carrier 16 of the second planetary stage, which in the present case does not require any further description.

[0034] Guide elements 24 are described by means of FIGS. 3 and 4, wherein provided are a plurality of guide elements 24 which are disposed circumferentially relative to the rotation axis A.sub.D and which are in each case operatively connected alternately to the transmission housing 12 and to a circumferential region of the planet carrier 16.

[0035] FIG. 3 shows an axial view of the first planetary stage 14, of which the planet carrier 16 and the surrounding transmission housing 12 are shown Moreover, a first functional type of the guide elements 24 is shown, wherein in the present case three of these guide elements 24 are disposed in a region of the lower half of the circumference of the planet carrier 16. In the present case, the guide elements 24 are held in a rotationally fixed manner on the transmission housing 12. Moreover, the guide elements 24 are disposed in a circumferential region 26 of the planet carrier 24 situated in an outer third of a radius R of the planet carrier 16. The guide elements 24 sit so as to be preloaded in the radial direction between the transmission housing 12 and the planet carrier 16. Spring elements 36 can be provided for effecting the radial preload of the guide elements 24. The guide elements 24 rest in a sliding manner on a circumferential face 38 of the planet carrier 16. In one of the guide elements, an oil channel 40 is provided, as will be explained below with reference to the figures hereunder. The guide elements 24 of the first functional type compensate at least largely for the weight force of the planet carrier 16 and the planet gears 18 and sun gear 22 seated therein.

[0036] FIG. 4 shows a detail of the first planetary stage 14 in the region of one of the guide elements 14. Shown is a cross section through a planet gear 18 which sits so as to be rotatable on a planet axle 42 between lateral supports 44 of the planet carrier 16. The guide elements 24 guide the planet carrier 16 relative to the transmission housing 12 in the axial and in the radial direction. The guide elements 24 are in each case constructed of multiple parts, wherein in each case one guide jaw 28 is disposed on each axial side of the planet carrier 16. It can be seen that the guide element 24 encompasses the planet carrier 16 on its two axial sides in the radial direction. In the present case, the guide jaws 28 are constructed of two parts, wherein for respective guiding a first jaw part 30 impinges on an outer circumferential face 28 of the planet carrier 16 and a second jaw part 32 impinges on an axial lateral face of the planet carrier 16. An oil channel 40 extends in each of the first jaw parts 30, which oil channel can extend radially, opening out in the region of the contact pairing of the outer circumferential face 28 of the planet carrier 16 and the inner face of the first jaw part 30 in order to supply this contact pairing with lubricant.

[0037] As can be seen here, provision can be made for a second oil channel 48 to extend in one of the two first jaw parts 30. In addition, a further oil channel 50, which communicates with the second oil channel 48 and which opens out at an outer circumference of the planet axle 42 and as a result supplies the mounting of the planet gear 18 on the planet axle 42 with lubricant, extends in the planet carrier 16 and in the planet axle 42.

[0038] FIG. 5 likewise shows an axial view of the first planetary stage 14 of which the planet carrier 16 and the surrounding transmission housing 12 are shown. Moreover, the second functional type of the guide elements 24 is shown, wherein in the present case three of these guide elements 24 are disposed in a region of the upper half of the circumference of the planet carrier 16. The design embodiment of the guide element 24 shown on the right corresponds to the guide elements 24 which have been described in relation to FIG. 4, except for the positioning. The design embodiment of the guide elements 24, which are illustrated at the top and the left in FIG. 5, is an alternative and will be described in detail on the basis of FIGS. 6, 7a) and 7b). In the second functional type, too, the guide elements 24 are held in a rotationally fixed manner on the transmission housing 12 and are disposed in a circumferential region 26 of the planet carrier 24, which is situated in an outer third of a radius R of the planet carrier 16. The guide elements 24 rest in a sliding manner on a circumferential face 38 of the planet carrier 16. The second functional type of the guide elements 24 allows the self-centering of the toothed elements, that is to say of the planet gears 18 and of the sun gear 22, within the planetary stage 14 in a targeted manner. Adjustable movement limits in the radial direction are predefined for the planet carrier 16 by way of the guide elements 24.

[0039] FIGS. 6, 7a) and 7b) show respective details of the first planetary stage 14 in the region of the guide elements 24. The guide elements are shown in various alternative design embodiments. FIG. 6 once again shows the first planetary stage 14 in the region of one of the guide elements 14. Shown is a cross section through a planet gear 18 which sits so as to be rotatable on a planet axle 42 between lateral supports 44 of the planet carrier 16. Two alternative design embodiments of the guide element 24 are illustrated. While the guide element 24 illustrated on the left between the transmission housing 12 and the planet carrier 16 is embodied in one part, the guide element 24 illustrated on the right between the transmission housing 12 and the planet carrier 16 is embodied in two parts. Both alternative design embodiments of the guide element 24 are screwed in a suitable manner to the transmission housing 12, which is embodied as a support structure of the ring gear 20 in this region, and guide the planet carrier both in the radial and in the axial direction.

[0040] FIG. 7a) shows, on the left, a design embodiment of the guide element 24 that is again embodied in two parts and comprises a guide roller 34 for radially guiding the planet carrier 16. As in the case of the alternatives of FIGS. 4 and 6, axial guiding of the planet carrier 16 is assumed by a second jaw part 32. The alternatives of the guide element 24 shown in FIG. 7a) on the left and 7b) are of structurally comparable design in that they are specifically provided with a wedge-shaped bevel 52 and interact with a mating face 54 of complementary design of the planet carrier 16. Axial and, at the same time, radial guiding of the planet carrier 16 relative to the transmission housing 12 is Implemented by way of the pairing of the bevel 52 and the mating face 54.

LIST OF REFERENCE SIGNS

[0041] 10 Planetary transmission [0042] 12 Transmission housing [0043] 14 Planetary stage [0044] 16 Planet carrier [0045] 18 Planet gear [0046] 20 Ring gear [0047] 22 Sun gear [0048] 24 Guide element [0049] 26 Circumferential region [0050] 28 Guide jaw [0051] 30 First jaw part [0052] 32 Second jaw part [0053] 34 Guide roller [0054] 36 Spring element [0055] 38 Circumferential face [0056] 40 Oil channel [0057] 42 Planet axle [0058] 44 Lateral supports [0059] 46 Lateral face [0060] 48 Oil channel [0061] 50 Oil channel [0062] 52 Bevel [0063] 54 Mating face [0064] 100 Wind power installation [0065] 102 Powertrain [0066] 104 Rotor flange [0067] 106 Multi-blade rotor [0068] 108 Main bearing unit [0069] 110 Transmission [0070] 112 Generator [0071] 114 Machine support [0072] 116 Tower [0073] 118 Main shaft [0074] 120 Bearing housing [0075] 122 Coupling [0076] 124 Generator shaft [0077] 126 Flange element