TRANSMISSION

Abstract

A transmission includes a shaft-hub connection designed as a serration and having an axial extent along a shaft axis, and an oil supply line to the serration in order to lubricate a relative movement in the serration between a shaft side and a hub side of the shaft-hub connection. The oil supply line is designed to open from radially inward directly into a cavity on the serration to enable supply of oil to the serration at an oil pressure that prevails in the cavity.

Claims

1.-14. (canceled)

15. A transmission, comprising: a shaft-hub connection designed as a serration and having an axial extent along a shaft axis; and an oil supply line to the serration in order to lubricate a relative movement in the serration between a shaft side and a hub side of the shaft-hub connection, said oil supply line designed to open from radially inward directly into a cavity on the serration to enable supply of oil to the serration at an oil pressure that prevails in the cavity.

16. The transmission of claim 15, wherein the oil supply line is formed in a shaft of the shaft-hub connection.

17. The transmission of claim 16, wherein the shaft of the shaft-hub connection at least partially delimits an axially extending supply channel communicating with the oil supply line.

18. The transmission of claim 17, wherein the supply channel forms an annular flow cross section.

19. The transmission of claim 17, further comprising a pitch tube designed to radially inwardly delimit the supply channel.

20. The transmission of claim 19, wherein the pitch tube is designed to corotate with the shaft of the shaft-hub connection.

21. The transmission of claim 15, wherein the cavity is arranged at an axial end of the serration.

22. The transmission of claim 15, wherein the cavity is arranged in a central axial region of the serration such that at least 20% of a remaining axial extent of the serration is situated on both sides of the cavity.

23. The transmission of claim 15, wherein the transmission is formed as an, in particular multistage, planetary gear mechanism, said planetary gear mechanism comprising an annulus, a web shaft, at least two planetary gears mounted on the web shaft and meshing with the annulus, a central shaft, and a central gear on the central shaft, said serration providing a force-transmitting connection between the central gear and the central shaft.

24. The transmission of claim 15, further comprising a stator, said oil supply line being supplied with oil via an oil supply from the stator, wherein the oil supply includes a shaft seal-sealed annular chamber between the stator and a shaft of the shaft-hub connection.

25. The transmission of claim 23, further comprising a stator, said oil supply line being supplied with oil via an oil supply from the stator, wherein the oil supply includes a shaft seal-sealed annular chamber between the stator and the central shaft.

26. The transmission of claim 15, further comprising a stator, said oil supply line being supplied with oil via an oil supply on the stator, wherein the oil supply includes an outlet opening which is arranged opposite an inlet opening, which extends in a circumferential direction of a circular movement of a shaft of the shaft-hub connection in the cavity at an axial end of the serration such that, during operation, an oil jet from the outlet opening is able to enter the inlet opening at least in certain circular movement phases.

27. The transmission of claim 23, further comprising a stator, said oil supply line being supplied with oil via an oil supply on the stator, wherein the oil supply includes an outlet opening which is arranged opposite an inlet opening, which extends in a circumferential direction of a circular movement of the central shaft in the cavity at an axial end of the serration such that, during operation, an oil jet from the outlet opening is able to enter the inlet opening at least in certain circular movement phases.

28. A wind turbine, comprising a transmission, said transmission comprising a shaft-hub connection designed as a serration and having an axial extent along a shaft axis, and an oil supply line to the serration in order to lubricate a relative movement in the serration between a shaft side and a hub side of the shaft-hub connection, said oil supply line designed to open from radially inward directly into a cavity on the serration to enable supply of oil to the serration at an oil pressure that prevails in the cavity.

29. The wind turbine of claim 28, wherein the transmission is formed as a planetary gear mechanism which includes an annulus, a web shaft, at least two planetary gears mounted on the web shaft and meshing with the annulus, a central shaft, and a central gear on the central shaft, said serration providing a force-transmitting connection between the central gear and the central shaft.

30. The wind turbine of claim 29, further comprising a bladed rotor connected in a force-transmitting manner to the web shaft.

31. The wind turbine of claim 28, further comprising a pitch adjustment device provided on the bladed rotor and controlled via control lines, said control lines forming a line connection with an oil supply to the oil supply line.

32. A computer-implemented method for simulating a transmission as set forth in claim 15.

33. A computer-implemented method for simulating a transmission as set forth in claim 28.

34. A computer program product embodied on a non-transitory computer readable medium comprising commands which, when executed by a computer, cause the computer to carry out a method for simulating a transmission and/or wind turbine.

Description

[0031] The invention is described in more detail below on the basis of a specific exemplary embodiment for illustration. In the figures:

[0032] FIG. 1 shows a schematic, simplified illustration of a transmission according to the invention which is formed as a multistage planetary transmission of a wind turbine,

[0033] FIG. 2 shows a detail of a schematic longitudinal section through a transmission according to the invention,

[0034] FIG. 3 shows a somewhat different detail than in FIG. 2 comprising further details of the oil supply for the serration,

[0035] FIG. 4 shows a detail which is depicted as IV in FIG. 3,

[0036] FIG. 5 shows a variant of the oil supply for the serration in a schematic longitudinal sectional illustration,

[0037] FIG. 6 shows a detail which is depicted as VI in FIG. 5,

[0038] FIG. 7 shows another variant of the oil supply for the serration in a schematic longitudinal sectional illustration,

[0039] FIG. 8 shows a further variant of the oil supply for the serration in a schematic longitudinal sectional illustration, and

[0040] FIG. 9 shows a further variant of the oil supply for the serration in a schematic longitudinal sectional illustration.

[0041] Functionally identical components are partially provided with identical reference signs. Functionally identical components are partially not depicted in all of the figures nor are they separately repeatedly explained for each individual Figure. It is to be assumed in principle that these components each have a substantially identical function in the different illustrations.

[0042] FIG. 1 shows a schematic, simplified illustration of a transmission TGR according to the invention which is formed as a multistage planetary transmission or planetary gear mechanism of a wind turbine WPP. In principle, the respective planetary gear transmission PGR comprises at least one annulus ANU, at least two planetary gears PWH on at least one web shaft CAR and at least one central gear CRW on a central shaft CSH, wherein—as illustrated in other figures—a serration SRT according to the invention is provided as a force-transmitting connection between the central gear CRW and the central shaft CSH.

[0043] The illustrated transmission TGR is formed as a multistage planetary gear mechanism PGR. A first planetary gear transmission stage PG1 comprises: a first annulus AN1, first planetary gears PW1 on at least a first web shaft CA1 and a first central gear CR1 on a first central shaft CS1.

[0044] A second planetary gear mechanism stage PG1 comprises: at least a second annulus AN2, second planetary gears PW2 on at least a second web shaft CA2 and a second central gear CR2 on a second central shaft CS2. The first central gear CR1 is coupled to the first central shaft CS1 by means of the serration SRT, wherein the first central shaft CS1 and the second web shaft CA2 are at least connected to one another in a rotationally fixed manner. In the present case, the first central shaft CS1 and the second web shaft CA2 are formed as a common component.

[0045] The wind turbine WPP illustrated in FIG. 1 additionally comprises a generator GNR for power generation that is coupled to the 2nd central shaft CS2. A bladed rotor WNG of the wind turbine WPP is connected to the first web shaft CA1 of the transmission TGR in a force-transmitting manner. A pitch adjustment device PAS is provided on the bladed rotor WNG. The pitch adjustment device PAS is controlled by means of control lines PCW, wherein the control lines PCW form a line connection with the oil supply OCP to the oil supply line OLS. In a manner which is not illustrated but has already been explained above, this line connection is configured as a so-called “double-walled pitch tube”. These control lines PCW connect the pitch adjustment device PAS to a central controller CPU.

[0046] FIGS. 2-8 each show different schematic illustrations of details of longitudinal sections through a multistage planetary gear transmission PGR formed as a transmission TGR according to the invention. The annuluses ANU, AN1, AN2 or the central axes thereof each extend here coaxially to the shaft axis SHX or to the axis of rotation of the respective central shaft CSH, CA1, CA2. In a manner which is not explained in more detail, the respective rotatable components are mounted rotatably with respect to one another or to a stator STA by means of rolling bearings or sliding bearings. Axes of rotation of planetary gears PW1 PW2 each extend parallel to the central axis of rotation SHX.

[0047] Between the central shaft CSH, CS1, CS2 and the central gear CRW, CW1, CW2 there is arranged a shaft-hub connection SHC which is formed as a serration SRT and which has an axial extent along a shaft axis SHX, wherein an oil supply line OLS of the serration SRT is provided in order to lubricate relative movements occurring in the serration SRT between a shaft side SFS and a hub side HBS of the shaft-hub connection SHC. The oil supply line OLS opens directly into a cavity CAV on the serration SRT such that the serration SRT can be supplied with the oil OIL at the oil pressure OPR prevailing in the cavity CAV.

[0048] FIG. 3 shows here how the double-walled pitch tube PAT is configured for transporting the oil OIL into the cavity CAV formed as an oil supply line OLS. The serration SRT is supplied with the oil pressure OPR from the cavity CAV.

[0049] In an enlarged detail illustration, FIG. 4 shows that the cavity CAV is arranged at the left axial end of the serration SRT such that the oil OIL flows through the gap of the serration SRT axially from left to right. Between the shaft of the shaft-hub connection HBS, in particular the central shaft CSH, and the pitch tube PAT, which is in particular connected to the central shaft CSH to form a double-walled pitch tube, there is formed a supply channel which is preferably formed as an annular gap and which communicates with the radially extending oil supply line OLS.

[0050] In a somewhat larger overview, FIG. 5 shows the path of the oil OIL through the double-walled pitch tube PAT starting from an oil supply OCP. The oil supply OCP can be formed as a shaft seal-sealed annular chamber (not shown), wherein, for example, a bronze bushing forms a seal, which operates as a sliding bearing, and defines a cavity of annular shape between the two relatively rotating components. FIGS. 7, 8, 9 each show variants of the oil supply OCP.

[0051] FIG. 6 shows a detail of the oil supply line OLS into the cavity CAV on the serration SRT of FIG. 5 on an enlarged scale. By contrast thereto, FIG. 7 shows a variant in which the cavity CAV or the oil supply line OLS is arranged in the central region of the serration SRT between the two axial ends.

[0052] Whereas the preceding variants of the oil supply line OLS provide a supply of the oil OIL as channels integrated into components, FIG. 8 shows the possibility of mounting separate pipelines PIP on the corresponding components for the oil.

[0053] FIG. 9 shows that the oil supply line OLS is supplied with oil OIL by means of an oil supply OJD on a stator STT of the transmission TGR, wherein the oil supply OJD has one or more outlet openings EOF which are arranged opposite at least one inlet opening OIN, which extends in the circumferential direction of the circular movement of the central shaft CSH, in the cavity CAV at an axial end of the serration SRT such that, during operation, an oil jet from the outlet opening EOF can enter the at least one inlet opening OIN at least in certain circular movement phases.