Bearing housing for a sliding bearing of a rotor shaft of a wind turbine generator

Abstract

The invention relates to a bearing housing (1) for a plain bearing (2) of a rotor shaft (3) of a wind turbine (4), comprising at least the following components: a positioning device (5) for positioning a bearing element (6), wherein the bearing element (6) has a defined bearing axis (7); a guide rail (8) for guiding the positioning device (5) along a positioning axis (9); and a securing device (10) for securing the positioning device (5) in the set position during assembly. The bearing housing (1) is distinguished in particular in that the positioning axis (9) is oriented obliquely relative to the bearing axis (7) of the bearing element (6) to be positioned. By means of the bearing housing presented here, the setting of the bearing clearance can be ensured in the long term.

Description

Technical Field

[0001] The present invention relates to a bearing housing for a sliding bearing of a rotor shaft of a wind turbine generator set, a sliding bearing having such a bearing housing for a rotor shaft of a wind turbine generator set, a rotor having such a sliding bearing of a wind turbine generator set, and a wind turbine generator set having such a rotor. Background Technology

[0002] Wind turbines are becoming increasingly important in the energy transition and decarbonization of energy infrastructure. Onshore wind turbines can reach power outputs of up to 7 MW, while offshore wind turbines can exceed 15 MW each. In the future, wind turbines will constitute what is known as the energy base load. Here, wind turbines utilize existing wind to drive a generator via rotor blades and the connected rotor shaft (which together form the rotor). This generator is configured to produce electricity using the provided torque. Future (offshore) wind turbines should even achieve power outputs of 20 MW or higher, reflected in the increased size of the rotor blades, generator, and rotor shaft.

[0003] In traditional wind turbine generators, the rotor shaft is supported both radially and axially. As the power output of wind turbine generators increases, the bearings on the rotor shaft must also meet higher requirements. In addition to the rotor shaft to be supported and the increased weight applied to the bearings, the increased torque acting on the bearings is also a factor to consider in wind turbine generator design. Bearings in traditional wind turbine generators can typically only be assembled or replaced on-site at extremely high cost. Furthermore, after bearing replacement, such as during maintenance, the radial and / or axial positions of the rotor shaft must be precisely set; otherwise, imbalance may occur, leading to generator damage. Summary of the Invention

[0004] Therefore, the objective of this invention is to at least partially overcome the disadvantages known in the prior art. Features of the invention are found in the independent claims, and advantageous embodiments are shown in the dependent claims. The features of the claims can be combined in any technically meaningful manner, and reference can also be made to the description below and the features in the accompanying drawings, which contain supplementary embodiments of the invention.

[0005] This invention relates to a bearing housing for a sliding bearing on the rotor shaft of a wind turbine generator set, comprising at least the following components: A positioning device for positioning a bearing element, wherein the bearing element has a defined bearing axis; A guide rail for guiding the positioning device along the positioning axis; and A fixing device for fixing the positioning device in a set position during assembly.

[0006] The bearing housing is particularly characterized in that the positioning axis is inclined relative to the bearing axis of the bearing element to be positioned.

[0007] In the following text, unless otherwise explicitly stated, the use of axial, radial, or circumferential directions and their corresponding terms refers to the aforementioned rotor axis. Ordinal numbers used in the foregoing and subsequent descriptions are for clarity only and do not indicate the order or rank of the components referred to, unless the contrary is explicitly stated. An ordinal number greater than one does not necessarily imply the existence of another component of that type.

[0008] A bearing housing for a sliding bearing is presented herein. This bearing housing is suitable, for example, for installation within a nacelle of a wind turbine generator. Alternatively, the bearing housing is also suitable for other equipment, particularly large equipment. The bearing (e.g., a sliding bearing) housed by this bearing housing is configured to support a rotor shaft (e.g., the rotor shaft of a wind turbine generator).

[0009] It is proposed herein that the bearing housing includes a positioning device configured to position the bearing element. Thus, the relevant bearing element can be adjusted axially (e.g., for axial bearings) and / or radially (e.g., for radial bearings) relative to the rotor axis via this positioning device. For example, for a sliding bearing, this allows adjustment of the desired bearing clearance. The bearing element is constructed as a component of the sliding bearing, thereby ensuring low-friction rotation by means of an oil film between the rotor shaft and the bearing housing. In one embodiment, the sliding bearing is configured for hydrostatic support, and in another embodiment for hydrodynamic support. When constructed in segments, such bearing elements are also referred to as sliding bearing segments or bearing pads, wherein multiple such bearing pads are distributed circumferentially (uniformly or depending on the load) along the rotor shaft. It should be noted that in one embodiment, such bearing pads are mounted to rotate with the rotor shaft, or conversely, fixedly mounted in the bearing housing. The corresponding opposing bearing surface is formed by the bearing housing or by the rotor shaft. This opposing bearing surface may also be provided in segments before assembly, but becomes a single, continuous surface for rotational operation after assembly.

[0010] The bearing element has a defined bearing axis. This bearing axis is the axis along which the bearing force is transmitted. For a (pure) axial bearing, the bearing axis is oriented axially, i.e., parallel to the rotor axis. For a (pure) radial bearing, the bearing axis is oriented radially relative to the rotor axis. For a sliding bearing, the bearing axis is oriented perpendicular to the sliding surface. In one embodiment as a skew bearing, i.e., when there are axial and radial force components, the bearing axis is oriented obliquely relative to the rotor axis accordingly. When the two components are equal, the included angle is 45°. It should be noted that there are many possibilities for the construction of the bearing element; only the simplest and most common forms are listed here for better clarity.

[0011] Furthermore, a guide rail for guiding the positioning device is provided herein. To ensure the precise positioning of the bearing elements and thus the rotor shaft during assembly, the guide rail is configured to orient the positioning device along a positioning axis. This guide rail is constructed in a template-like form, for example, connected to the bearing housing, preferably integrally connected. After assembly, i.e., during operation, the positioning device is coaxially oriented with the positioning axis.

[0012] Once the positioning device is positioned along the positioning axis during assembly, this position can be secured by a fixing device. In one embodiment, the fixing device is configured with threaded mating, wherein the guide rail has threads and the positioning device has corresponding internal threads. This is advantageous for smaller structural dimensions and / or for positioning related bearing components based on preload. For larger bearing components, preferably, the positioning device is configured to be fixed to or indirectly fixed to the bearing housing by separate means, such as a threaded rod and a nut. In an alternative embodiment, the fixing device is configured as a welded connection (direct or indirect) between the bearing housing and the positioning device.

[0013] For the adjustability of the aforementioned bearing element, the bearing element can be oriented using a positioning device. Therefore, for axial bearings, the axial bearing clearance should be set, or axial tolerances should be compensated, or a preload should be set, while only sufficient clearance needs to be maintained radially. The same applies to radial bearings; the setting is done radially, while clearance is maintained axially. Therefore, positioning can be achieved using a feed path inclined relative to the direction to be adjusted, for example, less than 45° for simplicity. Although reducing the path to be adjusted also reduces the clearance, the bearing force and the positioning axis are not aligned along the same axis. This achieves a combination of form-locking force flow (due to the inclination) and axial or radial adjustability in one function. That is, form-locking is formed because the force flow from the bearing element (along the bearing axis) and the positioning axis are not parallel to each other. This form-locking prevents creep during the expected lifespan of the device (e.g., in bolted connections), and the relative inclination of the positioning axis to the bearing axis also reduces the impact of such creep paths on the set position.

[0014] It should be noted that in radial and axial bearings, the positioning device is inclined relative to the rotor axis, while in skew bearings (e.g., preload supports for O-shaped or X-shaped arrangements), the bearing axis is inclined relative to the rotor axis, and is oriented, for example, radially or axially (i.e., parallel to the rotor axis).

[0015] Further, in an advantageous bearing housing embodiment, the guide rail is provided, wherein the guide rail comprises a channel opening. Preferably, the corresponding bearing element can pass through the channel opening.

[0016] It is now proposed that the guide rail be constructed as a channel opening. This allows for precise positioning of the bearing elements relative to the rotor shaft within the bearing housing, while simultaneously enabling safe and stable resistance to high alternating forces.

[0017] In a preferred embodiment, the corresponding bearing element or channel opening is configured such that the bearing element can pass through the channel opening. This also allows the bearing element to be removed and replaced or reinstalled during maintenance without disassembling the bearing housing itself. Especially for wind turbine generators, the time window for assembly operations is typically small because they are installed in windy areas or at high altitudes. Therefore, reducing assembly time is almost more important than the actual amount of assembly work.

[0018] It is further proposed here in an advantageous bearing housing embodiment, wherein the bearing housing is part of the bearing housing.

[0019] According to one aspect, a bearing housing for a sliding bearing of a rotor shaft of a wind turbine generator set is provided, comprising a bearing seat according to one embodiment described above.

[0020] A bearing housing including a bearing seat is hereby proposed. The bearing housing is configured to accommodate the bearing seat. For example, the bearing housing is constructed of one or more plates, thereby protecting the bearing seat from external influences. In one embodiment, the bearing housing is configured as a wet cavity, so that the at least one bearing element can be wetted by a lubricating oil film during operation (and protected from environmental influences).

[0021] Further proposed herein is an advantageous embodiment of the bearing housing in which the positioning device includes a stop surface. The stop surface can be fixed relative to the fixed opposing surface of the bearing housing at an adjustable distance. Preferably, the distance between the stop surface and the corresponding opposing surface can be adjusted by at least one shim.

[0022] The stop surface achieves a settable, definite position via a form lock, thereby simplifying proper assembly. Form locks are particularly advantageous for bearings that are set not by preload but by pure geometry (such as sliding bearings), providing simple and safe assembly. Preferably, the stop surface is located outside the bearing housing, more preferably outside the bearing casing, making it clearly visible and thus ensuring reliable and correct setting. In one embodiment, the stop surface and its corresponding opposing surface together provide a sealing function (e.g., via an O-ring).

[0023] The opposing surface mentioned herein corresponds to the stop surface and is preferably part of the bearing housing and / or bearing casing. For example, the opposing surface is a flange of the bearing housing or a machined surface. The stop surface can be fixed relative to the opposing surface at an adjustable distance. In one embodiment, the stop surface is configured to be in direct contact with the corresponding opposing surface when a predetermined distance or rotor shaft position is set. It should be noted that, in a preferred embodiment, the stop surface is fixedly mounted on a positioning device, and the corresponding opposing surface relative to the bearing housing for the positioning device is also fixedly mounted.

[0024] In a preferred embodiment, the spacing can be adjusted by at least one shim. This shim is, for example, a gasket, an elastic gasket, or an adjusting gasket. The at least one shim is positioned between the stop surface and the corresponding opposing surface, and the spacing between the stop surface of the positioning device and the corresponding opposing surface of the bearing housing is set in a form-locking manner by its axial extension dimension (relative to the positioning axis) or the sum of the extension dimensions of multiple shims. Thereafter, anti-loosening measures, such as the force lock generated by bolted connections, have no or only negligible effect on the correct setting of the positioning device position and thus the position of the associated bearing elements.

[0025] Further, in an advantageous embodiment of the bearing housing, the bearing element to be positioned is integrally formed with the positioning device. Here, the bearing element and the positioning device are constructed as a single unit. Alternatively, they can be constructed as separate parts or assemblies and fixed to each other by material bonding before assembly. Thus, the bearing element to be positioned is held in a predetermined orientation by means of the positioning device, thereby holding the rotor shaft in the corresponding position.

[0026] In a preferred embodiment, the bearing element and the positioning device are constructed as two separate components, so that the bearing element can be replaced or temporarily removed while the positioning device remains usable. However, the bearing element and the positioning device may also be connected to each other as a single assembly before assembly or (final) positioning.

[0027] Further, in an advantageous bearing housing embodiment, the bearing element to be positioned forms part of a radial bearing.

[0028] The bearing elements are configured, for example, as bearing rings or bearing pads for radial bearings. It is preferable to provide multiple bearing elements, and therefore multiple positioning devices, which preferably correspond to individual bearing segments (and therefore, individual bearing elements). To achieve reliable radial support, two or more radial bearings are typically distributed on the rotor shaft to be supported. For example, a shoulder is formed on the rotor shaft to be supported, at which surface characteristics and roundness suitable for optimally guiding the rotation of the rotor shaft are set. In some cases, due to tolerances, it is necessary to match the positions of multiple bearings to each other; therefore, the bearing elements are positioned by positioning devices, taking into account their respective other radial bearings. The positioning devices proposed herein reliably set the radial spacing relative to the rotor shaft, and due to form-locking action, this position can be reliably maintained throughout its service life.

[0029] Further, in an advantageous bearing housing embodiment, the bearing element to be positioned constitutes part of an axial bearing.

[0030] The bearing elements are configured, for example, as bearing rings or bearing pads for axial bearings. It is preferable to provide multiple bearing elements, and therefore multiple positioning devices, which preferably correspond to individual bearing segments (and therefore, individual bearing elements). To achieve reliable axial support, two or more opposing axial bearings are typically provided, provided the axis of rotation is not parallel to the Earth's gravitational field. For example, a shoulder is formed on the rotor shaft to be supported, at which an axial bearing is positioned on the left and right sides along the axial direction. The axial spacing between them and relative to the rotor shaft shoulder can be reliably set by means of the positioning devices.

[0031] According to another aspect, a sliding bearing for the rotor shaft of a wind turbine generator set is proposed, which includes... Bearing housings for multiple bearing components, At least one of the bearing elements is housed in a bearing housing according to one embodiment described above. Preferably, the bearing element is configured for hydrodynamic support.

[0032] A sliding bearing with a bearing housing is proposed herein, wherein the bearing housing is configured to house the sliding bearing. The sliding bearing is composed of multiple (sliding) bearing elements. Preferably, the bearing housing is constructed to be enclosed, thereby protecting the bearing elements from external influences. Furthermore, preferably, a wet cavity is formed inside the bearing housing, in which the bearing elements can be wetted with a lubricant for operation of the sliding bearing.

[0033] At least one bearing element is housed in a bearing housing constructed as described above. In one embodiment, the bearing element is configured as a self-lubricating sliding bearing.

[0034] In a preferred embodiment, the bearing element is configured as a hydrodynamic support for the rotor shaft. Here, the hydrodynamic buoyancy of the rotor shaft is caused by the wetting surface, thereby achieving reliable low-friction rotation. This also has the advantage that the surface pressure is reduced because the load is intrinsically and very uniformly distributed through the oil film, and because the (bearing) surface area is adaptable to each corresponding load condition. Preferably, a negative pressure is generated in the hydrodynamic support and drawn from the oil source into the bearing clearance, thereby intrinsically ensuring that the bearing clearance is adequately wetted over a long period of time.

[0035] The sliding bearing comprises multiple bearing elements, wherein at least one, preferably all, bearing elements are positioned by means of a positioning device with an inclined positioning axis, and preferably are also permanently supported relative to the bearing housing. Deviation of the bearing elements from their positioned positions during their lifespan due to creep can be reliably prevented. Furthermore, in one embodiment, ease of assembly and replaceability are achieved, thereby significantly reducing assembly time.

[0036] According to another aspect, a rotor for a wind turbine generator set is proposed, which includes at least the following components: A rotor shaft with a rotor axis; At least one sliding bearing according to one embodiment described above; Multiple rotor blades; A hub, wherein the rotor blades are connected to the rotor shaft via the hub. The rotor shaft is supported axially and / or radially by means of the bearing elements, so that it can rotate about its rotor axis.

[0037] The wind turbine generator set is configured to convert wind energy into electric current through a rotor that is driven to rotate by airflow and a generator connected in a manner that transmits torque.

[0038] For this purpose, the generator is connected by a rotor shaft, wherein the rotor shaft is configured to rotate about a rotor axis.

[0039] To support the rotor shaft, at least one sliding bearing as described above is provided. Preferably, multiple sliding bearings are provided around the rotor shaft, for example, the bearing element of a sliding bearing is disposed in a bearing housing.

[0040] To convert wind energy into electricity, multiple rotor blades are installed, which convert the incoming airflow into torque in an aerodynamic manner, thereby rotating the rotor shaft and converting the rotational energy into electrical energy at the generator when the load is running.

[0041] The force transmission from the rotor blades to the rotor shaft occurs through the hub. Typically, an adjustment transmission mechanism is installed in the hub to adjust the angle of the rotor blades (or their flow profile) according to the wind speed, and even to turn them to a neutral position when necessary (e.g., in a storm).

[0042] In addition, hydrodynamic bearing elements are provided to support the rotor shaft. Preferably, one or more bearing elements are provided for axial and / or radial support of the rotor shaft. For axial support, for example, in one embodiment, a double-sided shoulder or a groove (and a bearing element extending radially into it) is formed on the rotor shaft to be supported. It should be noted that in one embodiment, two or more bearing positions with axial spacing (relative to the rotor axis) are provided, wherein preferably only one is configured for axial support, thereby forming a so-called fixed-floating support structure.

[0043] The rotor includes at least one sliding bearing, wherein the bearing elements of at least one, preferably all, sliding bearings are positioned by means of a positioning device with an inclined positioning axis, and preferably are also permanently supported relative to the bearing housing. Deviation of the bearing elements from their set position during their lifespan due to creep can be reliably prevented. Furthermore, in one embodiment, ease of assembly and replaceability are achieved, thereby significantly reducing assembly time.

[0044] According to another aspect, a wind turbine generator set is proposed, which includes... Towers with a vertical axis; A nacelle with a generator is mounted on a tower and is capable of rotating about a vertical axis by means of a yaw system; A rotor rotatable about its rotor axis according to one embodiment described above. The rotor shaft is connected to the generator in a manner that transmits torque, and is used to convert the generator's rotation about the rotor axis into electric current.

[0045] It should be noted that the bearing housing or the sliding bearing is particularly advantageous for the bearing positions explicitly mentioned in wind turbine generator sets. However, the use of the sliding bearing is not limited to this, nor is it limited to wind turbine generator sets.

[0046] The wind turbine generator set is configured to convert wind energy into electric current through a rotor that is driven to rotate by airflow and a generator connected in a manner that transmits torque.

[0047] The nacelle is configured to carry and preferably house, and particularly preferably, energy conversion functional components with an outer streamlined shape. The nacelle is rotatable about a vertical axis relative to the tower, so that the rotor can be oriented according to the operating conditions (e.g., according to the current wind direction), i.e., by means of a so-called yaw system.

[0048] The rotor, which has its rotor blades, is connected to a rotor shaft, which is connected to a generator in the nacelle, either indirectly or directly, via, for example, a gearbox and / or an overload clutch, to generate electricity.

[0049] The rotor of the wind turbine generator includes at least one sliding bearing, wherein the bearing elements of at least one, preferably all, sliding bearings are positioned by means of a positioning device with an inclined positioning axis, and preferably are also permanently supported relative to the bearing housing. Displacement of the bearing elements from their set position during their lifespan due to creep can be reliably prevented. Furthermore, in one embodiment, ease of assembly and replaceability are achieved, thereby significantly reducing assembly time. Attached Figure Description

[0050] The invention will now be described in detail with reference to the accompanying drawings illustrating preferred embodiments and in light of the relevant technical background. The invention is in no way limited to these purely illustrative drawings, and it should be noted that these drawings are not drawn to scale and are not suitable for defining dimensions. The drawings show: Figure 1: A wind turbine generator set with a nacelle and a rotor; Figure 2: A schematic side view of a rotor shaft having radial and axial bearings; and Figure 3: Schematic cross-sectional view of the bearing element to be positioned in the bearing housing. Detailed Implementation

[0051] Figure 1 shows a wind turbine generator 4 with a nacelle 25 and a rotor 19. The vertical axis 24 of the tower 23 (shown horizontally here) is oriented vertically in the Earth's gravitational field 28, while the rotor axis 20 of the rotor shaft 3 (shown vertically here) is oriented horizontally in the Earth's gravitational field 28 (typically slightly tilted, for example, the hub 22 is tilted upwards relative to the ground at about 5° [five degrees] to 7°, see Figure 2). The nacelle 25, located at the top of the tower 23, is supported with low friction relative to the tower 23 by means of a yaw system 27 and is configured to rotate about the vertical axis 24. The nacelle 25 carries and encloses the generator 26 and (at least most) the rotor shaft 3, as well as the bearing assembly for the rotor shaft 3 (e.g., configured as a sliding bearing 2). The bearings shown are represented as fixed bearings with radial and axial supports. For example, this is the so-called main bearing of the rotor 19. Further support (by means of auxiliary bearings) may also be provided for the rotor shaft 3, for example, integrated into the generator 26. The rotor shaft 3 (located in front of the side opposite to the wind direction during power generation operation) is connected to a hub 22, to which multiple (e.g., three, but two are visible here) rotor blades 21 are connected, thereby forming a rotor 19 that can rotate about the rotor axis 20. Figure 2 An example of a possible implementation of the rotor 19 and the generator 26 in the nacelle 25 is shown and described below.

[0052] Figure 2 shows a schematic partially cut-away side view of a rotor shaft 3 rotatable about its rotor axis 20 (e.g., for use in a wind turbine generator set 4 according to Figure 1), where the left side of the illustration shows the rotor blades 21 cut into two parts of the connected hub 22 and rotor 19, and the right side shows the (purely optional) gearbox 29 and the connected generator 26. The direction of the Earth's gravitational field 28 in the figure is from top to bottom. In this (one of several possible) embodiment, the rotor shaft 3 is rotatably supported with low friction by a bearing assembly having a fixed bearing (right side of the figure) and a floating bearing (left side). At least one, preferably both, of the bearings in the bearing assembly are configured as sliding bearings 2 and supplied with bearing oil.

[0053] For example, at least one of the bearings is configured as a hydrodynamic sliding bearing 2. Figure 3 shows an example of a possible implementation of the sliding bearing 2 (preferably for a segmented sliding bearing 2), specifically an example having an adjustable bearing element 6 at the axial bearing 18, which will be described below.

[0054] Figure 3 shows a schematic cross-sectional view of the bearing element 6 to be positioned in the bearing housing 1. Here, a radial bearing 17 (optionally with a tilting element 30) and an axial bearing 18 are shown in the bearing housing 12, both of which are (optionally) constructed as sliding bearings 2, providing low-friction rotatable support for the central rotor shaft 3 by means of an oil-film-lubricated bearing clearance 31, allowing it to rotate about the rotor axis 20. Here, the rotor axis 20 is shown (preferably simplified) horizontally oriented relative to the Earth's gravitational field 28.

[0055] In the illustrated embodiment, the axial bearing 18 is configured to have a bearing element 6 that can be positioned by means of the positioning device 5. However, the radial bearing 17 can also be configured to be positionable. The bearing axis 7 (surface normal) of the axial bearing 18 is oriented parallel to the rotor axis 20 of the rotor shaft 3 to be supported. The bearing clearance 31 can be set by moving the positioning device 5 along the defined positioning axis 9 in the guide rail 8 (here, a channel opening 11 in the bearing housing 12). The bearing element 6 to be positioned of the axial bearing 18 is preferably fixed to the positioning device 5 and thus moves with the positioning device 5 as it moves along the positioning axis 9. The desired position of the bearing element 6 to be positioned of the axial bearing 18 is set by the distance 15 between the stop surface 13 of the positioning device 5 and the corresponding opposing surface 14 (here, alternatively, the opposing surface of the bearing housing 12). Here, optionally provided is a Shim 16 for adjusting the pitch 15 and a separate fixing device 10 relative to the bearing housing 12 (here optionally formed by bolt connection).

[0056] Because the positioning axis 9 is inclined relative to the bearing axis 7, the positioning device 5 forms a form-locking component of the retaining force acting on the axial bearing 18, thereby reliably preventing creep during its service life. Furthermore, an externally accessible channel opening 11 is formed in the bearing housing 12, formed by the guide rail 8 for the positioning device 5, through which the bearing element 6 can be guided to the desired position in the sliding bearing 2. It should also be noted that, in the illustrated embodiment, the positioning of the bearing element 6 to be positioned is also easily accessible from the outside.

[0057] With the bearing housing proposed here, the bearing clearance setting can be guaranteed over a long period of time.

[0058] Explanation of reference numerals in the attached figures 1 Bearing housing 2. Sliding bearings 3. Rotor shaft 4 Wind turbine generator sets 5. Positioning device 6. Bearing components to be positioned 7. Bearing axis 8 guide rails 9. Positioning Axis 10 Fixing devices 11. Channel opening 12 Bearing housing 13 Stop surface 14 Opposite surfaces 15 spacing 16 gaskets 17 Radial bearings 18 Axial bearings 19 Rotors 20 Rotor shaft 21 Rotor blades 22-inch wheels 23 towers 24 Vertical axis 25 Cabin 26 Generators 27 Yaw System 28 Earth's gravitational field 29. Gearbox 30 Tilting element 31 Bearing clearance

Claims

1. A bearing housing (1) for a sliding bearing (2) of a rotor shaft (3) of a wind turbine generator set (4), comprising at least: — A positioning device (5) for positioning a bearing element (6), wherein the bearing element (6) has a defined bearing axis (7); — A guide rail (8) for guiding the positioning device (5) along the positioning axis (9); and — A fixing device (10) for fixing the positioning device (5) in a set position during assembly, characterized in that the positioning axis (9) is inclined relative to the bearing axis (7) of the bearing element (6) to be positioned.

2. The bearing housing (1) according to claim 1, wherein the guide rail (8) is formed by a channel opening (11), and preferably, the corresponding bearing element (6) can pass through the channel opening (11).

3. The bearing housing (1) according to claim 1 or 2, wherein the bearing housing (1) is part of the bearing housing (12).

4. The bearing housing (1) according to any of the preceding claims, wherein the positioning device (5) includes a stop surface (13), wherein the stop surface (13) is fixed relative to a fixed opposing surface (14) of the bearing housing (1) at an adjustable distance (15), and preferably, the distance (15) between the stop surface (13) and the opposing surface (14) can be adjusted by at least one shim (16).

5. The bearing housing (1) according to any of the preceding claims, wherein the bearing element (6) to be positioned forms part of a radial bearing (17).

6. The bearing housing (1) according to any of the preceding claims, wherein the bearing element (6) to be positioned forms part of the axial bearing (18).

7. A sliding bearing (2) for a rotor shaft (3) of a wind turbine generator set (4), comprising a bearing housing (12) for a plurality of bearing elements (6), wherein at least one of the bearing elements (6) is housed in a bearing seat (1) according to any one of the preceding claims, and preferably, the bearing element (6) is configured for hydrodynamic support.

8. A rotor (19) of a wind turbine generator set (4), comprising at least: — A rotor shaft (3) having a rotor axis (20); — At least one sliding bearing (2) according to claim 7; — Multiple rotor blades (21); and — A hub (22) is provided, through which the rotor blades (21) are connected to the rotor shaft (3), wherein the rotor shaft (3) is supported axially and / or radially by means of the bearing elements (6) to be rotatable about its rotor axis (20).

9. A wind turbine generator set (4), comprising: — A tower (23) with a vertical axis (24); — A nacelle (25) having a generator (26), the nacelle (25) being mounted on the tower (23) and being able to rotate about the vertical axis (24) by means of a yaw system (27); and — The rotor (19) rotatable about its rotor axis (20) according to claim 8, wherein the rotor shaft (3) is connected to the generator (26) in a torque-transmitting manner for converting its rotation about the rotor axis (20) into electrical energy.

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