Bell housing for fastening wind gearbox in wind turbine

Abstract

The invention relates to a bell housing (26) for fastening a wind gearbox (18) in a wind turbine (10), the bell housing (26) having a first fastening region (30) for fastening to a gearbox housing of the wind gearbox (18) and a second fastening region (32) axially spaced from the first fastening region (30) by an annular body (28), the annular body (28) has a second fastening region (32) for fastening to a nacelle shell of the wind turbine (10) and / or to a main shaft bearing supporting a wind rotor shaft (16) of a wind rotor (12) of the wind turbine (10), the annular body (28) having at least two differently designed recesses (34) for damping structural sound. Noise emissions can be reduced in a large number of wind turbines (10) of different designs due to asymmetry achieved in the bell housing itself (26) due to the recesses (34) of different designs.

Description

Technical Field

[0001] The present invention relates to a bell-shaped housing through which a wind power transmission device can be fastened in a wind turbine. Background Technology

[0002] According to DE 10 2016 001 811 A1, it is known that structural noise in a wind turbine is damped by a multi-layered structure in the shaft of a wind-driven transmission device.

[0003] According to DE 10 2018 123 733 A1, it is known to dampen structural noise in wind turbines by providing a damping element on the ring gear carrier used for planetary gear sets.

[0004] According to DE 10 2018 123 870 A1, it is known to dampen structural noise in a motor vehicle transmission by providing grooves in a bearing plate connected to two bearings for mounting a drive shaft, which change the natural frequency of the bearing plate.

[0005] According to WO 2018 / 007184 A1 and DE 10 2016 212 375 A1, bell-shaped housings for securing a transmission housing including a planetary gear assembly to a nacelle of a wind turbine are known. The bell-shaped housings have identical cutouts, but the number of cutouts differs from the number of planetary gears in the planetary gear assembly, in order to improve the vibration behavior of the bell-shaped housings.

[0006] There is a continued need to reduce noise emissions from wind turbines. Summary of the Invention

[0007] The purpose of this invention is to propose measures to achieve wind turbines with low noise emissions.

[0008] This objective is achieved by a bell-shaped housing having the features of claim 1, a transmission mechanism having the features of claim 14, and a data aggregate having the features of claim 15. Preferred designs are indicated in the dependent claims and the following description, each of which may individually or in combination represent an aspect of the invention, the scope of which is determined by the claims. If one feature is presented in combination with another, this is merely for the purpose of simplifying the presentation of the invention and is in no way intended to suggest that the feature might not be part of the invention in the absence of the other features.

[0009] One aspect of the invention relates to a bell-shaped housing for securing a wind turbine drive unit in a wind turbine, the bell-shaped housing having a first fastening region for fastening to a drive unit housing of the wind turbine drive unit, and a second fastening region axially spaced from the first fastening region via an annular body for fastening to a nacelle housing of the wind turbine and / or a main shaft bearing supporting the wind turbine rotor shaft, wherein the annular body has at least two mutually different cutouts for damping structural noise.

[0010] The bell housing itself possesses an asymmetrical design due to the at least two, particularly at least four, preferably at least six, or even more differently designed cuts. This asymmetry in the shape of the bell housing, achieved regardless of the number of planetary gears in the wind turbine, is sufficient to prevent oscillations within the bell housing caused by resonance during continuous operation of the wind turbine. Instead, the differently designed cuts at the excitation frequency can generate different superimposed oscillations distributed over a wider frequency range, and generally do not include audible oscillations in the large frequency range of the excitation frequency. Even if audible oscillations should occur in the bell housing in individual cases, on the one hand, self-amplification caused by resonance is avoided or at least reduced, and on the other hand, the volume of the audible oscillations is so low that the emitted structural noise is barely audible outside the wind turbine nacelle. The number of cuts need not be adapted to the parameters of the wind turbine to be attached, so that the bell housing can achieve damping of structural noise within the wind turbine regardless of the specific design of the wind turbine and in all series types. Therefore, the same shape of bell housing can be used for a variety of different wind turbines, allowing for reduced manufacturing costs through mass production of the bell housing. The asymmetry of the bell-shaped casing, achieved through different design cuts, enables noise emission reductions in wind turbines with various designs.

[0011] The bell-shaped housing can at least partially cover a portion of the drive shaft protruding from the wind turbine, particularly the hub of the planetary carrier, and / or a portion of the wind turbine rotor shaft protruding from the main shaft bearing, and particularly bridges the axial distance between the main shaft bearing and the wind turbine. Preferably, a mechanical fastener is provided in the axial region between the wind turbine rotor shaft and the drive shaft, which is covered radially by the bell-shaped housing, particularly the annular body. Preferably, the bell-shaped housing is provided in addition to the main shaft bearing of the wind turbine rotor shaft and the wind turbine, particularly as a separate component. In particular, the bell-shaped housing is fixedly disposed in the wind turbine's drivetrain in a non-movably fixed manner and fastened for this purpose to equally non-movably fixed components, particularly the drivetrain housing, the main shaft bearing, the machine frame, and / or the wind turbine nacelle. Particularly preferably, the bell-shaped housing, comprising the annular body, a first fastening region, and a second fastening region, is produced as a single-piece component by master forming (e.g., by casting or sintering), particularly with the notch also being made during the master forming process. If necessary, post-processing can be performed after the main forming process, such as trimming, in particular to achieve the shape of the cut as precisely as possible.

[0012] The first fastening area is designed for fastening to the transmission housing of the wind power drive. For example, a flange connection is provided between two radially outward-projecting flanges. However, a threaded connection with internal threads may also be present in the axial and / or radial directions.

[0013] The transmission housing can be a double-shell design, for example, having a lower shell and an upper shell. However, multiple housing sections can also be arranged continuously in the axial direction, and these housing sections are connected to each other. In particular, if the gear stage of the wind turbine is designed as a planetary gear assembly with a stationary ring gear, the radially outward-facing side surface of the ring gear can realize the housing section of the transmission housing, and separately realized housing sections can be provided on one or both axial sides of the ring gear. Particularly preferably, the transmission housing does not have a protruding torque-counteracting support, thus requiring a particularly small installation space for the wind turbine. Without a torque-counteracting support connected to the transmission housing to support the torque on the main frame and / or nacelle, the torque-counteracting support has no reinforcing effect, making the transmission housing and the bell-shaped housing fastened to it relatively sensitive to vibration. However, the effect of the cutout in providing structural acoustic damping means that the torque-counteracting support can be omitted without incurring unnecessary noise emissions, thus saving the cost and installation space required for at least one additional torque-counteracting support.

[0014] The second fastening area can be designed for direct or indirect fastening to the nacelle housing and / or the main shaft bearing. For example, a bell-shaped housing can surround, wholly or partially, the main shaft bearing housed within the nacelle housing and be directly fastened to the nacelle housing. Preferably, the second fastening area is fastened to the main shaft bearing, particularly to the immovably fixed bearing housing of the main shaft bearing, so that the bell-shaped housing can also dampen vibrations occurring within the main shaft bearing. Therefore, the bell-shaped housing can also dampen vibrations occurring outside the wind turbine and reduce structural noise emissions.

[0015] The annular body of the bell-shaped housing can be positioned axially between the first and second fastening regions, bridging the axial distance between them, and is preferably a single piece. Apart from the cutouts, the annular body can be substantially based on a rotationally symmetric base body, which, as a semi-finished product, can conceptually serve as a starting body for designing cutouts with different designs.

[0016] The corresponding cutouts are primarily used for damping structural acoustics and can be configured accordingly for this purpose. Specifically, since the annular body bridging the axial distance between the fastening regions is most likely to vibrate compared to the fastening regions, and any structural acoustics generated in the region of the annular body can be damped or eliminated, the cutouts provided for damping structural acoustics are provided only in the annular body, i.e., not in the first or second fastening region. The corresponding cutouts can be designed as flat material cones with a smaller material thickness than in the region outside the cutout, such that the cutout can have a material thickness particularly smaller than the average material thickness of the annular body. Preferably, the material thickness of the annular body in the cutout region is zero, i.e., the cutout is implemented as a through opening.

[0017] The distinctive feature of the different designs of the cuts lies in the fact that one cut cannot be precisely matched with another by rotation of one cut about a designated (primary) axis of rotation of the wind turbine and / or the wind turbine rotor shaft. For a precise match between two cuts, in addition to a nominal rotation of one cut about the axis of rotation, at least one further conceptual transformation is required, provided that a finite number of transformations have been performed. Particularly preferably, the cuts have such different shapes that no number of affine transformations can make one cut coincide with another. Specifically, the cuts of different shapes are linearly independent surfaces.

[0018] Structural sound damping, achievable through cutouts of varying shapes, can reduce otherwise audible sounds emitted by the bell-shaped housing, particularly by damping and / or eliminating them. However, structural sounds emitted by the bell-shaped housing may occur at frequencies too high or too low for the human ear; in such cases, it is preferable to eliminate infrasound as far as possible, especially by means of elastic damping elements. Specifically, audible structural sounds emitted by the bell-shaped housing must be present at a volume that can no longer be perceived by the ears of people outside the cabin.

[0019] The remaining area of ​​the bell-shaped shell, made of a different material than the cut-out, can be shaped in such a way that the stiffness requirements, particularly the requirements for supporting yaw and / or tilt or pitch vibrations, can be met when yaw and / or tilt vibrations are introduced into the bell-shaped shell by an electric motor connected to a wind-powered drive. Therefore, the cut-out not only achieves structural acoustic damping but also reduces the amount of material used for the bell-shaped shell, thereby reducing weight and manufacturing costs.

[0020] Specifically, it is provided that at least two mutually different designs of cuts differ with respect to the position of their centroids in the axial direction and / or their surface area and / or their shape and / or their orientation in the tangential and axial directions. This difference in cut design may have already provided an effect on damping structural sound; in this case, preferably, multiple such differences can be combined. Particularly preferably, not only two mutually different types of cuts are provided, but three or more types of cuts are provided, each with a different shape, and they may differ from each other in one or more of the aforementioned differences. For example, one cut may have a angular edge, while another cut may have a rounded edge, although their position and / or surface area and / or orientation in the axial direction may be the same or partially or completely different. For example, one cut may have its maximum extent in a first direction (e.g., in the axial direction), and another cut may have its maximum extent in a second direction different from the first direction (e.g., in the circumferential direction), although their position and / or surface area and / or shape in the axial direction may be the same or partially or completely different.

[0021] Preferably, the shapes of at least two cuts with different designs represent affine mappings of each other, which are different from / identical to each other. The affine mapping from one cut to another can be a problem of parallel displacement and / or mirroring and / or scaling and / or rotation and / or shearing, thus excluding identical mappings due to affine mappings. Since one cut represents an affine mapping of another, the cuts are similar enough to allow for the early prediction and anticipation of possible vibrational behavior, as during the structural design process. This allows for the identification of particularly promising designs with different cuts during the structural design process, and testing is performed only on prototypes of that candidate pair. This simplifies the structural design process and keeps associated development costs low.

[0022] Particularly preferably, a first type of notch with a different design and / or representing an affine mapping to each other and a second type of notch with a different design and / or representing an affine mapping to each other are provided, wherein the first type of notch is configured differently from the affine mapping relative to the second type of notch. The affine mapping from one notch to another can be a problem of parallel displacement and / or mirroring and / or scaling and / or rotation and / or shearing, in which case identical mappings as a result of affine mappings are particularly excluded. Oscillatory behavior can be predicted relatively well within the corresponding type of notch. However, since non-affine mappings of the notches are also provided, the effect of structural acoustic damping may be disproportionately strong. Particularly strong structural acoustic damping can be achieved through reasonable effort during the structural design process and prototype construction.

[0023] Specifically, a cut is provided that extends fully open through the annular body in the radial direction, and is preferably defined only by the material of the annular body. Therefore, the cut can be implemented as a through opening solely within the annular body.

[0024] Preferably, the annular body has a thickened material at the edge of the corresponding cut. The thickening of the material can be of varying or equal thickness along the edge. The thickening of the material can deflect the forces acting on the cut edge around the cut and prevent damage to the cut edge due to stress peaks.

[0025] Particularly preferably, at least two thickened portions of material at the edges of different cuts are connected to each other via reinforcing ribs, wherein the reinforcing ribs are particularly achieved by further thickening of the material of the annular body. Specifically, the reinforcing ribs have a transverse extent to their longitudinal direction that is smaller than the minimum extent of the corresponding cut. Preferably, the reinforcing ribs extend substantially in the circumferential direction. Due to their reinforcing effect, the reinforcing ribs can prevent or at least inhibit oscillations in the region of the reinforcing ribs, such that only free oscillations and corresponding short paths with corresponding high frequencies imperceptible to the human ear are preserved for the generation of structured sound.

[0026] Specifically, the first fastening region and / or the second fastening region are defined by axial regions that project radially outward and / or radially inward relative to the annular body. The first fastening region and / or the second fastening region may be realized, for example, by a flange.

[0027] Preferably, damping elements are inserted into the corresponding cutouts. These damping elements are elastically deformable under vibration, and in particular, the material of the damping element differs from that of the annular body. Preferably, the damping element has different stiffness and / or different spring characteristics in different directions within the unfolded circumferential plane. Preferably, the damping element can provide different deformation behavior under load compared to the rest of the annular body. This allows for the application of further damping effects, which can also provide structural acoustic damping in frequency ranges where the rest of the annular body cannot be well damped. With the aid of damping elements, the structural acoustic damping of the bell-shaped shell can be further improved, customized, and / or adapted to alter boundary conditions without requiring replacement of the bell-shaped shell for this purpose.

[0028] Particularly preferably, the surface area of ​​the cut is sized for inserting tools, particularly screwdrivers, to manipulate components positioned within the annular body. At least some, and preferably all, of the cuts may have surface areas that allow tools to access the interior of the bell-shaped housing for maintenance and / or assembly purposes. For example, corresponding cuts sized in this way enable a threaded connection between the drive shaft and the wind turbine rotor shaft of a wind turbine, wherein the bell-shaped housing is already installed within a volume defined by the bell-shaped housing. This improves ease of assembly and maintenance.

[0029] Specifically, a first fastening region and / or a second fastening region are provided with a support for mounting the planetary carrier of the wind turbine or for mounting the wind turbine rotor shaft and / or implemented as a single piece. Separate mounting in the wind turbine or main shaft bearing can be omitted. Therefore, in particular, a bearingless planetary carrier or sun gear shaft without bearings of the planetary carrier acting directly on the inside of the transmission housing of the wind turbine can be mounted on one side of the wind turbine outside the bell housing. Thus, a planetary carrier or sun gear shaft specifically mounted in the bell housing can be used to utilize axial clearance within short teeth inside the wind turbine, wherein the gear components follow the torque flow to compensate for axial misalignment between the wind turbine and the wind turbine rotor shaft, and the axial relative position of the planetary carrier mounted on one side or the sun gear shaft mounted on one side can be defined by a single-piece or separately implemented support in the bell housing.

[0030] Preferably, the first fastening region is integrally formed with the transmission housing or the transmission housing portion of the wind power transmission device, and / or the second fastening region is integrally formed with the bearing housing of the main shaft bearing. Therefore, the number of components can be reduced and component integration increased.

[0031] Particularly preferably, the first fastening region is connected to the annular body and / or the second fastening region is connected to the annular body and / or the first part of the annular body is connected to the second part of the annular body via a welded joint. The welding production of the bell-shaped housing results in structural changes to the joint components in the weld region, which in turn reduces the amount of free oscillation within the bell-shaped housing. Therefore, at least the formation and transmission of excitation vibrations within the bell-shaped housing are reduced. The welded connection also results in additional stiffness, which reduces the vibration capability of the bell-shaped housing and provides better support for forces and moments occurring during operation.

[0032] Another aspect of the invention relates to a transmission device for a wind turbine having a wind power transmission having at least one gear stage designed as a planetary gear unit and a bell-shaped housing fastened to the transmission housing of the wind power transmission unit on the axial side facing the wind rotor. This can be achieved and developed as described above, wherein, in particular, the number of slits in the bell-shaped housing can be divided by the number of planetary gears in at least one gear stage of the planetary gear unit, and preferably, the number of slits can be divided by the number of planetary gears in all gear stages of the planetary gear unit. The asymmetry of the bell-shaped housing itself, achieved by using slits of different designs, makes it possible to reduce noise emissions in multiple wind turbines of different designs.

[0033] Another aspect of the invention relates to a data aggregate comprising data packets combined in a public file or distributed across various files for mapping the three-dimensional shapes and / or interactions of all components in a bell-shaped housing or a transmission device that can be designed and developed as described above. The data packets are prepared to perform additive manufacturing of the bell-shaped housing or the transmission device during processing by a data processing device for operating machine tools for additive manufacturing of the device, particularly by 3D printing, and / or during processing by a data processing device for performing technical simulations, simulating the function of the bell-shaped housing or the transmission device, and outputting the simulation results generated in the process for further use, particularly to provide proof of fatigue strength as a function of variable loads and / or variable temperature loads, and, if necessary, to compare them with measurement data determined on a device already actually produced according to the invention and / or on a prototype of the device according to the invention. The data packets of the data aggregate are particularly suitable for the design of the corresponding devices according to the invention described above, i.e., bell-shaped housings and / or gear mechanisms, so that the interactions of the components of the device according to the invention can be fully represented during processing in the data processing device. Specifically, data packets can be stored in a spatially distributed manner, but can be adapted to each other in such a way that, when all data packets are combined in a common data processing device, the resulting data aggregate provides all the data required for additive manufacturing and / or technical simulation of the data processing device by means of the device according to the invention. For example, each data packet is a separate part of a database, which is combined to achieve data aggregation and adapted to each other relative to their relative size and / or absolute size and / or material properties corresponding to the corresponding device according to the invention. The data aggregate can represent a virtual embodiment of the corresponding device according to the invention in a so-called "digital twin" manner, which enables virtual inspection in simulated or physically physical form by means of additive manufacturing processes. Such a digital twin is presented, for example, in US 2017 / 286572 A1, the disclosure of which is incorporated herein by reference.

[0034] When the machine tool's data processing unit processes the data aggregate, it produces the device according to the invention, such that after processing the data aggregate in the data processing unit, the device according to the invention is obtained at least in prototype form. Specifically, in each case, the data packet can represent a component of a separately implemented associated device according to the invention, such that the individual components can be readily assembled, both physically and / or virtually, in their relative positions and / or relative mobility to achieve the interactions necessary for the invention. In particular, the corresponding data packets can be used to additively manufacture various components of the corresponding device individually, and possibly from different materials, and then assemble them to form a prototype of the corresponding device. Thus, dividing the data of the data aggregate into different data packets enables the simple sequential additive manufacturing of movable parts of the corresponding device relative to each other in the form of kits, which are assembled only in a meaningful manner to prepare for the interactions according to the invention of the prototype components, in order to solve the problem on which the invention is based.

[0035] Additionally or alternatively, according to the invention, data packets of a data aggregate in a virtual environment can be used during technical simulation to calculate and / or predict the individual components of the corresponding device, their interactions, physical states, and / or changes in physical parameters as various boundary conditions and / or over time of the associated device according to the invention, and this can be continued to be used to check whether the device according to the invention is sufficiently suitable for the intended application based on the assumed design and considering the assumed simulation effects. If the data aggregate is processed by a data processing device that maps the simulation environment, boundary conditions, particularly varying boundary conditions, can be considered to investigate the behavior of the device according to the invention. This allows, for example, the study of centrifugal force effects in the various components of the device according to the invention, dependent on various static and / or dynamic loads and / or different operating temperatures, in which case such simulation results can be incorporated into the creation of fatigue strength verification. Preferably, the simulation results obtained after processing the data aggregate in the data processing device for the simulation environment are stored to compare them with measurement data determined on devices actually manufactured according to the invention and / or on prototypes of devices according to the invention. This allows the quality of the simulation results obtained by means of data aggregation to be evaluated and / or measurement errors and / or erroneous measurements to be identified, especially in the case of particularly large deviations. This thus simplifies and improves the non-destructive quality control of the device according to the invention.

[0036] Data aggregation enables the cost-effective production of prototypes and / or computer-based simulations to study the functionality of the device under consideration, identify problems in specific applications, and find improvements. The achievement of the objectives upon which this invention is based can be easily and inexpensively verified by means of data aggregation. Attached Figure Description

[0037] In the following description, the invention is explained by way of example based on preferred embodiments and with reference to the accompanying drawings, wherein the features presented below may individually or in combination represent aspects of the invention, the scope of which is determined by the claims. In the drawings: Figure 1 A schematic perspective view of a wind turbine is shown. Figure 2 : Shows the use of Figure 1 A schematic perspective view of the bell-shaped casing of a wind turbine. Figure 3 It shows Figure 2 A schematic side view of the bell-shaped housing, and Figure 4 It shows Figure 2 A schematic side view of the bell-shaped housing, relative to... Figure 3 The bell-shaped shell is offset in the circumferential direction. Detailed Implementation

[0038] Figure 1 The wind turbine 10 shown can be used to generate electrical energy from wind power. For this purpose, the wind turbine 10 has a wind turbine rotor 12, which can be set to rotate by wind power. The wind turbine rotor 12 is connected to a drivetrain 14. For this purpose, the wind turbine rotor 12 is connected to a wind turbine shaft 16, which is connected to a wind power transmission device 18 within the drivetrain 14 to convert the torque introduced via the wind turbine rotor 12 and the wind turbine shaft 16. The torque converted in the wind power transmission device 18 is transmitted via a motor shaft 19 to an electric motor operating in generator mode, which can form a generator 20. The electrical energy generated by the electric motor can be supplied to a rechargeable battery and / or the power grid. In the illustrated embodiment example, the drivetrain 14 is integrally housed in a nacelle 22, which is attached to the upper free end of a support tower 24. The wind turbine rotor 12, the wind power transmission device 18, and the generator 20 can be arranged coaxially relative to each other and preferably inclined relative to the horizontal plane. The pitch tube can extend from the generator 20 through the wind power transmission 18 to the wind rotor 12 so that cables can be routed to the blade pitch control of the wind rotor 12.

[0039] The wind turbine rotor shaft 16, installed in the main shaft bearing, can... Figure 2The bell-shaped housing 26 shown is connected to the input-side drive shaft of the wind turbine 18, facing the wind rotor 12. The wind turbine 18 has at least one gear stage, preferably designed as a planetary gear set. The input-side drive shaft is specifically implemented by a hub with a bearingless planetary carrier. The bell-shaped housing 26 has an annular body 28, with a first fastening region 30 and a second fastening region 32 attached at the axial ends of the annular body 28, particularly as an integral unit. For example, the first fastening region 30 and the second fastening region 32 project radially outward, particularly to realize flanges for flange connections. The first fastening region 30 can be connected to the transmission housing of the wind turbine 18, while the second fastening region 32 can be connected to the main shaft bearing and / or the nacelle housing of the nacelle 22.

[0040] Multiple cuts 34, designed as through openings, are implemented in the annular body 28. These cuts differ in their axial position, surface area, shape, and / or orientation within the annular body 28, so that when the bell housing 26 vibrates during operation of the transmission system 14, the corresponding cuts 34 primarily contribute to damping structural acoustics. In contrast to the cuts 34 in the annular body 28, the openings in the fastening regions 30, 32 are primarily used for fastening the bell housing 26 and do not make a significant measurable contribution to structural acoustic damping. The minimum size of the corresponding cuts 34 is significantly larger than the maximum diameter of the screws / threaded parts used to connect the fastening regions 30, 32, allowing the corresponding cuts 34 to be large enough that tools, or even the hands of an assembler in the case of individual cuts 34, can pass through them. Particularly preferably, the annular body 28 is continuous and has no cutouts 34 in the lower angular range (e.g., 30° ± 10°) in the direction of gravity, because the bell-shaped housing 26 can rest on the support (e.g., the main frame) in this angular range, and the support itself can provide reinforcement that results in structural acoustic damping.

[0041] like Figure 2 As shown, the corresponding cut 34 may have reinforcing edges 36 provided by thickening the material of the annular body 28. Specifically, the annular body 28 has reinforcing ribs 38, preferably also achieved by thickening the material, which extend substantially in the circumferential direction. Preferably, the reinforcing ribs 38 can connect two reinforcing edges 36 of different cuts 34 to each other; in this case, the reinforcing ribs 38 may not extend in a completely closed manner in the circumferential direction in the same axial region of the annular body 28, but only in a partially angular region.

[0042] like Figure 3 As shown, for example, oval cuts 34 of different lengths and widths can be provided, which represent affine mappings of each other but are not identical. Furthermore, these cuts 34 can be offset from each other in both the axial and circumferential directions.

[0043] like Figure 4 As shown, identical cuts 34 of the first type 40, such as oval ones, can also be continuously arranged in the common axial region in the circumferential direction, while identical cuts 34 of the second type 42, such as circular ones, can also be continuously arranged in the common axial region in the circumferential direction. The cuts 34 of the first type 40 and the cuts 34 of the second type 42 may differ in their axial position, their surface dimensions, their shape, and / or orientation within the annular body 28, but within their respective types 40, 42, the cuts 34 can have the same shape. Preferably, the cuts 34 of the first type 40 do not represent an affine mapping of the cuts 34 of the second type 42.

[0044] If necessary, a damping element that is elastically deformable under load can be inserted into at least one of the slits 34, in which case the damping element can completely or partially close the slit 34. The damping element can be made of, for example, thermoplastic or elastomeric plastic, so that the frequency range of structural acoustic damping that the damping element can dampen is different from the frequency range of the slit 34 that houses the damping element.

Claims

1. A bell-shaped housing (26) for securing a wind power transmission device (18) in a wind turbine (10), having The first fastening area (30) is used to fasten to the transmission housing of the wind power transmission device (18), and The second fastening region (32), which is axially spaced from the first fastening region (30) via an annular body (28), is used for fastening to the nacelle shell of the wind turbine (10) and / or the main shaft bearing of the wind turbine rotor (16) supporting the wind turbine rotor (12) of the wind turbine (10). The annular body (28) has at least two cutouts (34) of different designs for damping structural sound.

2. The bell-shaped housing (26) according to claim 1, wherein, The at least two mutually different cuts differ in the following aspects: The position of their centroids in the axial direction and / or Their surface area and / or Their shape and / or Their orientation in the tangential and axial directions.

3. The bell-shaped housing (26) according to claim 1 or 2, wherein, The shapes of at least two cuts (34) with different designs represent affine maps of each other, which are different from the identities.

4. The bell-shaped housing (26) according to any one of claims 1 to 3, wherein, Provides cutouts (34) of a first type (40) that are different from each other in design and / or represent affine mappings of each other and cutouts (34) of a second type (42) that are different from each other in design and / or represent affine mappings of each other, wherein the cutouts of the first type (40) are configured to be different from the affine mappings of the cutouts (34) of the second type (42).

5. The bell-shaped housing (26) according to any one of claims 1 to 4, wherein, The cut (34) extends through the annular body (28) in a fully open manner in the radial direction and is defined only by the material of the annular body (28).

6. The bell-shaped housing (26) according to any one of claims 1 to 5, wherein, The annular body (28) has thickened material at the edge (36) of the corresponding cut (34).

7. The bell-shaped housing (26) according to claim 6, wherein, At least two material thickenings implemented at the edges (36) of different cuts (34) are connected to each other via reinforcing ribs (38), wherein the reinforcing ribs (38) are implemented by further thickening the material of the annular body (28).

8. The bell-shaped housing (26) according to any one of claims 1 to 7, wherein, The first fastening region (30) and / or the second fastening region (32) are defined by axial regions extending radially outward and / or radially inward relative to the annular body (28).

9. The bell-shaped housing (26) according to any one of claims 1 to 8, wherein, A damping element is inserted in the corresponding cut (34), which can elastically deform under the influence of vibration. The material of the damping element is different from the material of the annular body (28). The damping element has different stiffness and / or different spring characteristics in different directions in the unfolded circumferential orientation plane.

10. The bell-shaped housing (26) according to any one of claims 1 to 9, wherein, The surface area of ​​the cut (34) is designed to accommodate the insertion of tools, particularly screwdrivers, for manipulating components located inside the annular body (28).

11. The bell-shaped housing (26) according to any one of claims 1 to 10, wherein, The first fastening area (30) and / or the second fastening area (32) have a planetary carrier for mounting the wind power transmission device (18) or a support for mounting the wind power rotor shaft (16), and / or are implemented as a single piece.

12. The bell-shaped housing (26) according to any one of claims 1 to 11, wherein, The first fastening region (30) is integrally formed with the transmission housing or transmission housing portion of the wind power transmission device (18), and / or the second fastening region (32) is integrally formed with the bearing housing of the main shaft bearing.

13. The bell-shaped housing (26) according to any one of claims 1 to 11, wherein, The first fastening region (30) is connected to the annular body (28) and / or the second fastening region (32) is connected to the annular body (28) and / or the first part of the annular body (28) is connected to the second part of the annular body (28) via a weld joint.

14. A transmission device for a wind turbine (10), the wind turbine (10) having a wind power transmission device (18) having at least one gear stage designed as a planetary gear device and having a bell housing (26) as claimed in any one of claims 1 to 13, the bell housing (26) being fastened to a transmission housing of the wind power transmission device (18) on an axial side facing a wind rotor (16), wherein the number of cuts (34) in the bell housing (26) is divisible by the number of planetary gears in at least one gear stage designed as a planetary gear device, wherein preferably, the number of cuts (34) is divisible by the number of planetary gears in all gear stages designed as a planetary gear device.

15. A data aggregate comprising data packets grouped together in a common file or distributed across various files, for mapping the three-dimensional shape and / or interaction of all components disposed in the bell-shaped housing (26) as claimed in any one of claims 1 to 13 or the transmission device as claimed in claim 14, wherein, The data packet is prepared to When additive manufacturing of equipment is performed by a data processing device for operating machine tools, particularly by 3D printing, the additive manufacturing of the bell-shaped housing (26) or the components of the transmission device is carried out. and / or When processed by a data processing device for performing technical simulations, the function of the bell housing (26) or the transmission device is simulated, and the simulation results generated in the process are output for further use, particularly for providing verification of fatigue strength based on variable loads and / or variable temperature loads.

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