TRANSMISSION MOUNTING FOR A WIND TURBINE

Abstract

A machine arrangement for rotary transmission of a drive power includes a housing element, a rolling-bearing arrangement including an inner bearing raceway, an outer bearing raceway, rolling bodes designed to roll on the inner and outer bearing raceways, and a bearing cover, and a rotation element held in the housing element via the rolling-bearing arrangement for rotation about an axis of rotation. The housing element has structure regions directed toward the rolling bodies. The inner and outer bearing raceways are formed by a material which is connected integrally to the structure regions respectively and which is applied additively to the structure regions. The bearing cover of the rolling-bearing arrangement is designed to include the structure region which forms the outer bearing raceway.

Claims

11. (Canceled)

12. A machine arrangement for rotary transmission of a drive power, the machine arrangement comprising: a housing element; a rolling-bearing arrangement comprising an inner bearing raceway, an outer bearing raceway, rolling bodes designed to roll on the inner and outer bearing raceways, and a bearing cover; and a rotation element held in the housing element via the rolling-bearing arrangement for rotation about an axis of rotation, wherein the housing element has structure regions directed toward the rolling bodies, with the inner and outer bearing raceways being formed by a material which is connected integrally to the structure regions respectively and which is applied additively to the structure regions, and wherein the bearing cover of the rolling-bearing arrangement is designed to include a corresponding one of the structure regions which forms the outer bearing raceway.

13. The machine arrangement of claim 12, wherein the bearing cover is designed such that an axial position of the bearing cover with respect to the housing element is adjustable.

14. The machine arrangement of claim 12, wherein the bearing cover is arranged on a side of the machine arrangement on which side a drive power is absorbed or on a side of the machine arrangement on which side the drive power is delivered.

15. The machine arrangement of claim 12, wherein the material applied to the structure regions has undergone a material treatment which influences a surface hardness.

16. The machine arrangement of claim 12, wherein the material has a rolling strength which is greater than a rolling strength of a base material of the structure regions.

17. The machine arrangement of claim 12, wherein the bearing cover comprises a circumferentially extending collar which projects between the housing element and the rolling bodies in an axial direction, with the outer bearing raceway being formed on the collar.

18. A drive train for a wind turbine for torque-transmitting connection of a rotor to a generator, the drive train comprising: a main bearing unit comprising a bearing housing and a main shaft; and a transmission driven via the main shaft and designed to at least indirectly drive the generator, said transmission comprising a housing element designed to form a transmission housing, a planet carrier designed to form a rotation element, and the machine arrangement of claim 12, wherein the transmission housing, the planet carrier and the rolling-bearing arrangement form the machine arrangement.

19. The drive train of claim 18, wherein the bearing cover of the rolling-bearing arrangement is arranged on a side of the transmission which side is directed toward the rotor or on a side of the transmission which side is directed toward the generator.

20. A wind turbine, comprising: a rotor flange comprising a rotor; a generator; and a drive train held on a machine carrier and connecting the rotor flange to the generator, said drive train comprising a main bearing unit comprising a bearing housing and a main shaft, and a transmission driven via the main shaft and designed to at least indirectly drive the generator, said transmission comprising a housing element designed to form a transmission housing, a planet carrier designed to form a rotation element, and the machine arrangement of claim 12, wherein the transmission housing, the planet carrier and the rolling-bearing arrangement form the machine arrangement.

21. A method for setting the machine arrangement of claim 12, the method comprising adapting an abutment surface of an abutment shoulder of the bearing cover with respect to the housing element by mechanical reworking during assembly for setting an axial position of the bearing cover.

22. The method of claim 21, further comprising inserting a spacer element between the abutment shoulder of the bearing cover and a housing flange of the housing element for setting the axial position.

Description

[0022] 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:

[0023] FIG. 1 a schematic illustration of a wind turbine in a first embodiment, and

[0024] FIG. 2 a detail of a bearing configuration in a transmission for a wind turbine as per FIG. 1.

[0025] FIG. 1 shows in a schematic and not-to-scale illustration a wind turbine 100 in one possible embodiment. A fundamental element of the wind turbine 100 is a drive train 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. Via a machine carrier 114, at least the main bearing unit 108 and the generator 112 are supported via a tower 116 with respect to the ground (not Illustrated). The main bearing unit 108 comprises a main shaft 118 which is mounted via a rolling-bearing arrangement 16 so as to be rotatable about an axis of rotation D with respect to a bearing housing 120 of the main bearing unit 108. The rotor flange 104 is held on one end of the main shaft 118, and the rotor 106 is held on said rotor flange. The other end of the main shaft 118 is connected in terms of drive to the transmission 110 via a coupling 122 in order to introduce into the transmission 110 a drive torque or a drive power applied by the rotor 106. The transmission 110 may be designed as a planetary transmission with one or more planetary stages and comprise the machine arrangement 10. The transmission 110 is connected in terms of drive to the generator 112 via a generator shaft 124. The transmission 110 can deliver the drive power to the generator 112 via the generator shaft 124. The bearing housing 120 is connected to the transmission 110 via a flange 126. A reaction moment of the transmission 110 is supported with respect to the machine carrier 114 via the flange 126.

[0026] FIG. 2 shows a detail of the transmission 110, which is illustrated merely structurally in FIG. 1. The transmission 110 is designed as a planetary transmission, of which only one planetary stage is illustrated. The transmission 110 comprises a machine arrangement 10, which in turn comprises a housing element 12 and a rotation element 14 of the transmission 110. The housing element 12 may be of multi-part design; it may comprise for example a first and a second housing flange 44 and 46 connected thereto via screw connections. The rotation element 14 may be for example a planet carrier of the first planetary stage. The rotation element 14 is, via a rolling-bearing arrangement 16 with rolling bodies 20 rolling on bearing raceways 18, held in the housing element 12 so as to be rotatable about the axis of rotation A.sub.D. The rotation element 14 designed as a planet carrier carries planet gears (not illustrated) which mesh radially outward with an inner toothing 26 and radially inward with a sun gear (likewise not illustrated). On the input side, that is to say on the left-hand side in the illustration shown, the rotation element 14 is in a drive connection with the main shaft 118 described in relation to FIG. 1.

[0027] FIG. 2 shows a configuration of the machine arrangement 10 in which the rolling-bearing arrangement 16 has a first rolling bearing 30 and a second rolling bearing 32. The rolling bearings 30, 32 are designed as tapered-roller bearings. Bearing raceways 18 of the rolling bearings 30, 32 are formed by a structure region 22, directed toward the respective rolling bodies 20, of the housing element 12 and of the rotation element 14. An inner bearing raceway 18.sub.1 of the first rolling bearing 30 is formed by a structure region 22 of the rotation element 14, that is to say of the planet carrier. Moreover, an inner bearing raceway 18.sub.1 of the second rolling bearing 32 is likewise formed by a structure region 22 of the rotation element 14, and an outer bearing raceway 18.sub.1 of the rolling bearing 32 is formed by a structure region 22 of the housing element 12.

[0028] For the first rolling bearing 30, provision is made of a bearing cover 42 which comprises the outer bearing raceway 18.sub.2. The bearing cover 42 forms a circumferentially extending collar 38 which projects between the housing element 46 and the rolling bodies 20 in the axial direction. The outer bearing raceway 18.sub.2 is formed on the collar 38. Via the collar 38, the bearing cover of the first rolling bearing is seated axially in a centering seat 40 of the housing element 46. The axial positioning of the bearing cover 42 with respect to the housing element 46 allows a bearing preload or a bearing clearance of the rolling-bearing arrangement 16 to be set.

[0029] In the configuration of the machine arrangement 10 shown in FIG. 2, the bearing cover 42 is arranged on a side on which the drive power is absorbed. In the present case, this is the left-hand side in the illustration. Alternatively, the bearing cover 42 may also be arranged on that side of the machine arrangement 10 on which the drive power is delivered, which would be the right-hand side in the present Illustration. A separate illustration of this alternative arrangement of the bearing cover 42 is omitted. As a further alternative, it is possible for provision to be made of two bearing covers 42, of which one is arranged on the drive side and one is arranged on the output side.

[0030] For setting the axial position of the bearing cover 42, the bearing cover 42 is reworked at the abutment shoulder 28 by way of cutting machining of the abutment surface with respect to the housing element 46, whereby the axial position of the bearing-cover collar 38, into which the bearing raceway 18.sub.2 is integrated, is set. For setting the axial position of the bearing cover 42, it is alternatively possible for provision to be made of at least one spacer element 48 which is seated between the bearing cover 42 and the housing element 46. The spacer element 48 may be configured as a spacer ring between an abutment shoulder 28 of the bearing cover 42 and an abutment flange 46 of the housing element.

[0031] The bearing raceways 18.sub.1, 18.sub.2 which are formed by the respective structure region 22 of the housing element 46 or of the rotation element 14 are formed by a material which is connected integrally to the structure region 22. The material is applied additively to the structure region 22. Provision may be made for the material applied to the structure region 22 to have undergone before start-up a material treatment which influences or increases the surface hardness. Provision may furthermore be made for the bearing raceways 18 to form one or more bearing rims.

LIST OF REFERENCE SIGNS

[0032] 10 Machine arrangement [0033] 12 Housing element [0034] 14 Rotation element [0035] 16 Rolling-bearing arrangement [0036] 18 Bearing raceway [0037] 20 Rolling body [0038] 22 Structure region [0039] 26 Inner toothing [0040] 28 Abutment shoulder [0041] 30 Rolling bearing [0042] 32 Rolling bearing [0043] 38 Collar [0044] 40 Centering seat [0045] 42 Bearing cover [0046] 44 Housing flange [0047] 46 Housing flange [0048] 48 Spacer element [0049] 100 Wind turbine [0050] 102 Drive train [0051] 104 Rotor flange [0052] 106 Multi-blade rotor [0053] 108 Main bearing unit [0054] 110 Transmission [0055] 112 Generator [0056] 114 Machine carrier [0057] 116 Tower What is claimed is: