Sliding bearing for wind turbine and wind turbine

Abstract

The invention relates to a sliding bearing for a wind turbine and the wind turbine. The sliding bearing comprises a fixed bearing surface and a rotatable bearing surface. The stationary bearing surface is non-rotatably connectable to a nacelle of a wind turbine. The rotatable bearing surface is non-rotatably connectable to a rotor of the wind turbine and is slidable along the fixed bearing surface, which can be brought into a rotating state relative to the fixed bearing surface from a stationary state in which the rotatable bearing surface is stationary relative to the fixed bearing surface, in the rotational state, the rotatable bearing surface rotates relative to the fixed bearing surface about a rotational axis. At least one of the fixed bearing surface and the rotatable bearing surface is a reversibly deformable bearing surface configured to rotatably interact with the fixed bearing surface by the rotatable bearing surface, a profile in one of the rotational states being reversibly changeable compared to a profile in the stationary state. The application also relates to a wind turbine with a sliding bearing.

Description

Technical Field

[0001] The present invention relates to a sliding bearing for a wind turbine and a wind turbine, and particularly to a sliding bearing for supporting the rotor of a wind turbine relative to a generator or relative to the nacelle of the wind turbine. Background Technology

[0002] The use of sliding bearings to mount the rotor of a wind turbine in a nacelle is known, for example, in EP 2 101 071 B1. Each of these sliding bearings comprises an outer bearing sleeve and an inner ring. When the wind turbine rotor is stationary, the inner ring abuts against the outer sleeve in the contact area, creating a crescent-shaped space between the inner ring and the outer bearing sleeve. As the rotor begins to rotate, the inner ring moves radially along the axis of rotation, causing the space between the inner ring and the outer bearing sleeve to extend completely around the circumference of the inner ring. The shape of the space between the inner ring and the outer bearing sleeve varies with the rotational speed of the rotor. Therefore, the lubricant conditions in this space can be very unstable or unfavorable. Summary of the Invention

[0003] Therefore, the object of the present invention is to provide a sliding bearing for wind turbines that can reduce the probability of instability or other adverse conditions.

[0004] This objective is achieved by the wind turbine provided in the embodiments of the present invention.

[0005] The sliding bearing according to an embodiment of the present invention is configured for implementation in a wind turbine. The sliding bearing includes a fixed bearing surface and a rotatable bearing surface.

[0006] Each of the fixed bearing surface and the rotatable bearing surface can be configured as a single continuous surface or multiple adjacent or separate surfaces. Specifically, each of the fixed bearing surface and the rotatable bearing surface can have or form a straight cylindrical lateral surface or a truncated conical lateral surface. Alternatively, each of the fixed bearing surface and the rotatable bearing surface can include at least one segment with a straight cylindrical lateral surface shape and at least one segment with a truncated conical lateral surface shape.

[0007] The fixed bearing surface is configured to be non-rotatably connected to the nacelle of the wind turbine. That is, the fixed bearing surface can be formed by one or more portions of the nacelle of the wind turbine. In particular, the fixed bearing surface can be configured to be non-rotatably connected to the gearbox of the wind turbine and / or the stator of the generator of the wind turbine.

[0008] The rotatable bearing surface is configured to be non-rotatably connected to the rotor of a wind turbine. That is, the rotatable bearing surface can be formed by one or more portions of the rotor of the wind turbine that can be non-rotatably connected to it. In particular, the rotatable bearing surface can be configured to be non-rotatably connected to the input shaft of a gearbox or the rotor of a generator of a wind turbine.

[0009] The rotatable bearing surface is slidably arranged along the fixed bearing surface, allowing the rotatable bearing surface to transition from a stationary state to a rotating state relative to the fixed bearing surface. In the stationary state, the rotatable bearing surface is stationary relative to the fixed bearing surface. In the rotating state, the rotatable bearing surface rotates about a rotation axis relative to the fixed bearing surface. In other words, the fixed bearing surface and the rotatable bearing surface are not flat, and one of the fixed bearing surface and the rotatable bearing surface may be arranged inside the other. In other words, one of the fixed bearing surface and the rotatable bearing surface surrounds the other.

[0010] The sliding bearing is configured such that at least one of the fixed bearing surface and the rotatable bearing surface is configured as a bearing surface capable of reversible deformation. The reversibly deformable bearing surface is configured such that, through rotatable interaction between the rotatable bearing surface and the fixed bearing surface, the profile of the reversibly deformable bearing surface in at least one of the rotational states of the rotatable bearing surface can be reversibly changed compared to the profile of the reversibly deformable bearing surface in a stationary state.

[0011] The term "reversible" can refer to the property of a bearing surface that elastically changes its shape. The term "deformable" can refer to the property that a bearing surface changes its profile such that the profile of a reversibly deformable bearing surface in at least one of the rotational states of a rotatable bearing surface is neither geometrically similar to nor geometrically congruent to the profile of a reversibly deformable bearing surface in a stationary state of a rotatable bearing surface.

[0012] Interactions between the surfaces of a rotatable bearing can occur on a fluid film.

[0013] Specifically, the reversibly deformable bearing surface can be configured to change its profile according to the rotational speed or angular velocity of the rotatable bearing surface. Specifically, the reversibly deformable bearing surface can be configured to be at least locally flexible, such that pressure changes between the stationary bearing surface and the rotatable bearing surface and / or pressure changes in the fluid film are sufficient to deform the reversibly deformable bearing surface, the pressure changes being caused by changes in the rotational speed or angular velocity of the rotatable bearing surface.

[0014] In other words, a reversibly deformable bearing surface can be configured to passively adjust its profile according to pressure changes between a fixed bearing surface and a rotatable bearing surface, the pressure changes being caused by changes in the rotational speed or angular velocity of the rotatable bearing surface.

[0015] Providing surfaces for flexible bearings makes it possible or easier to build and maintain fluid films under different operating and load conditions.

[0016] According to one aspect of the invention, the sliding bearing can be configured as a hydrodynamic sliding bearing. In particular, the hydrodynamic sliding bearing can be equipped with a pump for providing hydrostatic pressure between the fixed bearing surface and the rotatable bearing surface during the start-up (transition from a stationary state to one of the rotating states) and / or shutdown (transition from one of the rotating states to a stationary state) of the hydrodynamic sliding bearing.

[0017] Configuring a sliding bearing as a hydrodynamic sliding bearing can increase its robustness.

[0018] According to one aspect of the invention, the rotatable bearing surface may be arranged radially relative to the axis of rotation inside the fixed bearing surface.

[0019] When a sliding bearing starts (i.e., the rotatable bearing surface leaves its stationary state and enters one of the rotational states), the fixed bearing surface and / or the rotatable bearing surface are moved / deformed / stretched or compressed, causing the clearance between the fixed bearing surface and the rotatable bearing surface to increase or become greater than zero. By arranging the rotatable surface inside the fixed surface, the deformation of the rotatable bearing surface due to centripetal force can offset the increase in clearance during rotation.

[0020] According to one aspect of the invention, a sliding bearing may include at least one deformable bearing pad, which at least partially provides at least one bearing surface capable of reversible deformation.

[0021] When the flexible portion of the fixed bearing surface and / or the rotatable bearing surface is formed by at least one bearing pad, the various portions of the fixed bearing surface and / or the rotatable bearing surface can be adjusted to accommodate local bearing conditions. In cases of localized wear on the fixed bearing surface and / or the rotatable bearing surface, using multiple bearing pads also makes it possible to replace only a single bearing pad.

[0022] A sliding bearing may include at least one bearing pad support, and at least one deformable bearing pad may be mounted to at least one bearing pad support. At least one deformable bearing pad may be configured as a movable bearing pad that can move relative to the bearing pad support. A movable bearing pad simplifies the installation of the sliding bearing. At least one movable bearing pad may be configured to tilt about a circumferential tilt axis, which is perpendicular to the axis of rotation and parallel to the rotatable bearing surface at the movable bearing pad. Additionally or alternatively, at least one movable bearing pad may be configured to tilt about a radial tilt axis, which is perpendicular to the axis of rotation and perpendicular to the rotatable bearing surface at the movable bearing pad. The tiltability of at least one movable bearing pad perpendicular to the axis of rotation may be advantageous for compensating for loads on the sliding bearing caused by the yaw motion and / or pitch motion of the entire rotor of the wind turbine relative to its nacelle (not to be confused with the pitch motion of a single blade relative to the hub). Additionally or alternatively, at least one movable bearing pad may be configured to tilt about an axial tilt axis parallel to the axis of rotation. The tiltability of at least one movable bearing pad parallel to the axis of rotation can be advantageous for compensating for loads caused by sudden changes in rotational speed. At least one movable bearing pad can translate perpendicularly to the surface of the rotatable bearing, such that the radial position of at least one translatable bearing pad relative to the axis of rotation is adjustable. This radial translational mobility of at least one movable bearing pad can be advantageous—providing zero clearance even in the event of wear. The radial position of at least one movable bearing pad can be adjusted via pad supports of varying thicknesses and / or via at least one shim. That is, the sliding bearing can be configured to accommodate and / or retain pad supports of varying thicknesses and / or at least one shim. Specifically, the sliding bearing may include at least one connection port configured to selectively connect pad supports of varying thicknesses and / or at least one shim to the remainder of the sliding bearing structure. Providing the option to accommodate pad supports of varying thicknesses and / or at least one shim simplifies the manufacture of the sliding bearing because larger tolerances during component manufacturing can be compensated for during assembly. At least one translatably movable bearing pad may be connected to a bearing pad support via at least one lifting bolt, at least one spring, and / or at least one wedge. In other words, a sliding bearing may be configured to receive and / or retain at least one lifting bolt, at least one spring, and / or at least one wedge, and at least one lifting bolt, at least one spring, and / or at least one wedge may be configured to retain at least one translatably movable bearing pad.In other words, the sliding bearing may include at least one connection port configured to connect at least one lifting bolt, at least one spring, and / or at least one wedge to the remainder of the sliding bearing structure, and at least one translatably movable bearing pad may include at least one connection port configured to connect at least one lifting bolt, at least one spring, and / or at least one wedge to at least one translatably movable bearing pad. Providing the option to connect at least one translatably movable bearing pad via at least one lifting bolt, via at least one spring, and / or via at least one wedge enables advantageous stepless adjustability.

[0023] According to one aspect of the invention, at least one deformable bearing pad may have a non-uniform thickness. In particular, the cantilever portions of at least one deformable bearing pad, especially the portions of at least one deformable bearing pad that are cantilevered relative to the pad support, may have different thicknesses. Each cantilever portion of at least one deformable bearing pad may have a non-uniform thickness and / or the thicknesses of different cantilever portions of at least one deformable bearing pad may be different from each other.

[0024] Providing non-uniform thickness makes it easy to achieve non-uniform flexibility.

[0025] According to one aspect of the invention, the non-uniform thickness can vary circumferentially or parabolically with respect to the axis of rotation.

[0026] Parabolic or cubic variations in thickness can facilitate the material-saving manufacturing of sliding bearings.

[0027] According to one aspect of the invention, the cross-section of at least one deformable bearing pad in a cutting plane parallel to the axis of rotation and / or in a cutting plane perpendicular to the axis of rotation may be asymmetrical.

[0028] Asymmetrical configuration in a cutting plane parallel to the axis of rotation increases the ability to generate fluid film thicknesses for different operating conditions. Asymmetrical configuration in a cutting plane perpendicular to the axis of rotation allows for the optimization of at least one deformable bearing pad for a predetermined rotation direction of the rotatable bearing surface.

[0029] According to one aspect of the invention, at least one deformable bearing pad may have a non-uniform density. In particular, the cantilever portions of at least one deformable bearing pad, especially the portions of at least one deformable bearing pad cantilevered relative to the pad support, may have different densities. Each cantilever portion of at least one deformable bearing pad may have a non-uniform density and / or the densities of different cantilever portions of at least one deformable bearing pad may differ from each other.

[0030] Providing deformable bearing pads with non-uniform density can promote increased flexibility by increasing compressibility.

[0031] According to one aspect of the invention, at least one deformable bearing pad may include a porous structure. In particular, at least one deformable bearing pad may be at least partially perforated, or the porous structure may be at least partially perforated.

[0032] Providing openings facilitates the efficient handling of uneven density. Providing openings also offers a simple method for achieving lubricant supply.

[0033] According to one aspect of the invention, at least one deformable bearing pad may include a frame structure. In other words, at least one deformable bearing pad may include a truss-type or bone-like structure. In particular, at least one deformable bearing pad may include a rod-like portion configured to primarily withstand compressive or tensile stress.

[0034] Providing a frame structure can increase the amount of appropriate materials.

[0035] According to one aspect of the invention, at least one deformable bearing pad may comprise at least two different components made of at least two different materials.

[0036] Offering different materials allows different parts of the bearing pad to be adapted to their respective local conditions.

[0037] According to one aspect of the invention, at least two different components can be arranged in layers.

[0038] In terms of using materials particularly suitable for bearing surfaces, providing different layers may be advantageous.

[0039] According to one aspect of the invention, one of the at least two different components may be or include a leading edge with respect to the direction of rotation of the rotatable bearing surface, and the other of the at least two different components may be or include a body section of at least one deformable bearing pad.

[0040] By using a leading edge made of a material different from that of the main section, the leading edge can be optimized in terms of flow requirements, while easily meeting the structural requirements of the main section.

[0041] According to one aspect of the invention, a reversibly deformable bearing surface may include a circularly curved portion having a first curvature in a static state, wherein in at least one rotational state, the first curvature may be changed (i.e., increased or decreased) to a second curvature. Specifically, the bearing pad may be configured such that in another rotational state where the angular velocity of the rotatable bearing surface is greater than / less than the second curvature, the circularly curved portion exhibits a third curvature greater than / less than the second curvature. That is, the change between the second and third curvatures may occur in the same manner as the change in angular velocity (i.e., an increase in angular velocity leads to an increase in the curvature of the circularly curved portion of the reversibly deformable bearing surface), or in the opposite manner to the change in angular velocity (i.e., an increase in angular velocity leads to a decrease in the curvature of the circularly curved portion of the reversibly deformable bearing surface).

[0042] The present invention also relates to a wind turbine comprising a nacelle and a rotor, wherein the rotor is rotatably connected to the nacelle via a sliding bearing according to the invention. In particular, the nacelle may be pivotally connected to the tower of the wind turbine. The wind turbine may include a generator capable of directly generating electricity through the rotation of the rotor. Alternatively, the wind turbine may include gears interconnecting the rotor and the generator. Attached Figure Description

[0043] In the following, exemplary embodiments of the invention are described in more detail with reference to the accompanying drawings: Figure 1 A schematic diagram of a wind turbine is shown.

[0044] Figure 2 It shows along Figure 1 The cross-sectional view of line II-II in the diagram.

[0045] Figure 3 A schematic cross-sectional view of the bearing pad and the corresponding bearing pad support is shown in a static state.

[0046] Figure 4 It shows the state of rotation. Figure 3 A schematic cross-sectional view of the bearing pad and the corresponding bearing pad support.

[0047] Figure 5 A schematic cross-sectional view of a bearing pad with uneven thickness and the corresponding bearing pad support is shown.

[0048] Figure 6 A schematic cross-sectional view of the asymmetrical bearing pad and the corresponding bearing pad support is shown.

[0049] Figure 7 A schematic cross-sectional view of the sandwich-type bearing pad and the corresponding bearing pad support is shown.

[0050] Figure 8 A schematic cross-sectional view of the frame-type bearing pad and the corresponding bearing pad support is shown.

[0051] Figure 9 A schematic cross-sectional view of the porous bearing pad and the corresponding bearing pad support is shown.

[0052] These accompanying drawings are merely illustrative in nature and their sole purpose is to simplify the understanding of the invention.

[0053] Similar features of any of the embodiments shown in the accompanying drawings will be numbered accordingly. Detailed Implementation

[0054] Figure 1 An exemplary embodiment of a wind turbine 2 according to the invention is shown, comprising a wind turbine tower 4 disposed on a foundation. The foundation shown here is an onshore foundation, but an offshore foundation may also be used. A nacelle 6 is disposed on the wind turbine tower 4 via a yaw bearing system. A rotor 8 is rotatably disposed relative to the nacelle 6 and includes a hub 10 mounted, for example, via a pitch bearing system, to at least two wind turbine blades 12.

[0055] The wind turbine blade 12 is shown herein as a full-span wind turbine blade, but a partially pitchable wind turbine blade may also be used. A partially pitchable wind turbine blade may include an inner blade section and an outer blade section, wherein a pitch bearing system may be arranged between the two blade sections.

[0056] The rotor 8 is mounted in the nacelle 6 via sliding bearings. An exemplary configuration of the sliding bearings is shown in... Figure 2 As shown in the figure, it is as follows Figure 1 The cross-sectional view shown along line II-II.

[0057] The rotor 8 includes a cylindrical and / or conical portion having a cylindrical and / or conical rotatable bearing surface 14. The rotor 8 and the rotatable bearing surface 14 are embedded in a plurality of bearing pads 16. Figure 2 In the illustrated embodiment, the sliding bearing includes twelve bearing pads 16. Typically, a sliding bearing may include at least two bearing pads 16, which enclose the rotor 8 between them.

[0058] Each of the provided bearing pads 16 includes a contact surface 18 designed to contact the rotatable bearing surface 14. The contact surfaces 18 of the provided bearing pads 16 together form the fixed bearing surface 20 of the sliding bearing.

[0059] Depending on the cylindrical and / or conical shape of the rotatable bearing surface 14, the contact surface 18 of the fixed bearing surface 20 lies within a common virtual cylindrical surface and / or truncated conical surface. The cylindrical surface and truncated conical surface can refer to a surface that is partially cylindrical and partially truncated conical.

[0060] Each bearing pad 16 is connected to the nacelle 4 (i.e., specifically to the frame or shell of the nacelle 4) via a bearing pad support 22. Each bearing pad support 22 is connected to the corresponding bearing pad 16 via a bearing pad joint 24.

[0061] Figure 3 The images show in detail the stationary states of the rotor 8 and the rotatable bearing surface 14, respectively. Figure 2 The bearing pad 16, bearing pad support 22, and bearing pad connector 24 are shown. That is, in Figure 3 In the state shown, the angular velocity ω0 of the rotor 8 and the rotatable bearing surface 14 is zero. The bearing pad connector 24 includes a connector element on the bearing pad side (hereinafter referred to as: pad-side connector element 26) and a connector element on the bearing pad support side (hereinafter referred to as: support-side connector element 28). With the aid of the bearing pad connector 24, the bearing pad 16 can be tilted relative to the bearing pad support 22.

[0062] The bearing pad 16 includes a protrusion 30 on the side opposite the contact surface 18, which is configured to connect to the pad-side connector element 26. The pad-side connector element 26 has a ball cap / frustum shape, wherein a hole 32 extends between two parallel planes of the ball cap / frustum. The hole 32 is sized such that the protrusion 30 of the bearing pad 16 is press-fitted into the hole 32. Alternatively, the bearing pad 16 and the pad-side connector element 26 can be configured to connect to each other via a threaded connection, welded connection, brazed connection, adhesive connection, or any other type of connection.

[0063] The bearing pad support 22 includes a receiving portion 34 on the side facing the bearing pad 16 during assembly. The receiving portion 34 is configured to receive a support-side connector element 28. The support-side connector element 28 is annular and, during installation, has a rounded corner on its outwardly facing radially inward side. The rounded corner has a curvature corresponding to the curvature of the pad-side connector element 26. The dimensions of the receiving portion 34 are determined such that the annular support-side connector element 28 is press-fitted into the receiving portion 34. Alternatively, the bearing pad support 22 and the support-side connector element 28 can be configured to be connected to each other via a threaded connection, welded connection, brazed connection, adhesive connection, or any other type of connection.

[0064] In a static state, the curvature k0 of the contact surface 18 of the bearing pad 14 (and thus the statically fixed bearing surface 20) is at least approximately equal to the reciprocal of the radius R of the rotor 8 and the rotatable bearing surface 14.

[0065] The contact surface 18 (which in turn fixes the bearing surface 20) is configured as a bearing surface capable of reversible deformation. For example... Figure 4 As shown, when the rotor 8 (and thus the rotatable bearing surface 14) begins to rotate (i.e., when the rotor 8 and the rotatable bearing surface 14 enter a rotational state where the angular velocity ω1 of the rotor 8 and the rotatable bearing surface 14 is greater than zero), the contact surface 18 (and thus the stationary bearing surface 20) deforms under the influence of rotation, causing the curvature k1 of the contact surface 18 (and thus the stationary bearing surface 20) to become less than the curvature k0 in the stationary state.

[0066] like Figure 3 and Figure 4 The contact surface 18 and the fixed bearing surface 20 shown can be configured to exhibit a different curvature when the rotor (and consequently the rotatable bearing surface 14) rotates at an angular velocity greater than ω1. This other curvature can be less than or greater than curvature k1. The other curvature can also be equal to curvature k0.

[0067] exist Figure 3 and Figure 4 In the configuration shown, the curvature k0 in the static state is at least approximately equal to the reciprocal of the radius R of the rotor 8 and the rotatable bearing surface 14. Alternatively, the curvature k0 in the static state may be less than the reciprocal of the radius R of the rotor 8 and the rotatable bearing surface 14. In this case, the bearing pad can be configured such that the curvature k1 in one of the rotating states becomes at least approximately equal to the reciprocal of the radius R of the rotor 8 and the rotatable bearing surface 14. Alternatively, the bearing pad can be configured such that the curvature in the rotating state is less than the curvature k0 in the static state.

[0068] Figures 5 to 9 Different configurations of bearing pads 116, 216, 316, 416, and 516 are shown. The corresponding bearing pad support 22 and bearing pad connector 24 are as follows. Figure 3 and Figure 4 As shown and configured as described above.

[0069] Figure 5 The bearing pad 116 shown has an uneven thickness and a generally crescent-shaped cross-section. The thin section 136 at the edge of the bearing pad 116 is configured to be more flexible than the central section 138 of the bearing pad 116.

[0070] Similar to Figure 5 The configuration shown is Figure 6 The bearing pad 216 shown has an uneven thickness and a generally crescent-shaped cross-section. The thinner sections 236 and 240 at the edges of the bearing pad 216 are configured to be more flexible than the central section 238 of the bearing pad 216. Figure 5The configurations shown differ, with the thin sections 236 and 240 at the edges of the bearing pad 216 not being configured identically. One of the thin sections (i.e., section 240) is even more tapered than the other thin section (i.e., section 236). In this way, the reversibly deformable bearing surface 18 can be configured to deform asymmetrically with respect to the bearing pad joint 24. Specifically, the larger of the two sections 236 and 240 (i.e., section 236) can be positioned at the leading edge with respect to the rotation of the rotatable bearing surface 14, while the thinner of the two sections 236 and 240 (i.e., section 240) can be positioned at the trailing edge 244 with respect to the rotation of the rotatable bearing surface 14.

[0071] Similar to Figure 5 The configuration shown is Figure 7 The bearing pad 316 shown has an uneven thickness and a generally crescent-shaped cross-section. The thinner section 336 at the edge of the bearing pad 316 is configured to be more flexible than the central section 338 of the bearing pad 316. Figure 5 The configuration shown differs, with bearing pad 316 comprising two layers 346 and 348. Layer 346 is disposed on the side of bearing pad 316 facing bearing pad support 22 and is configured not to contact rotor 8 and rotatable bearing surface 14. Layer 348 is disposed on the side of bearing pad 316 facing rotor 8 and rotatable bearing surface 14 and includes contact surface 18 and leading edge 342 and trailing edge 344 of bearing pad 316 relative to rotation of rotatable bearing surface 14.

[0072] Similar to Figure 5 The configuration shown is Figure 8 The bearing pad 416 shown has an uneven thickness and a generally crescent-shaped cross-section. (Compared to...) Figure 5 The configuration shown differs; the bearing pad 416 is not a solid structure. That is, the bearing pad 416 includes at least a nearly plate-shaped contact surface portion 450 on the side of the bearing pad 416 facing the rotor 8 and the rotatable bearing surface 14, and at least a nearly plate-shaped joint portion 452 on the side of the bearing pad 416 facing the bearing pad joint 24. Portions 450 and 452 of the bearing pad 416 are connected to each other via beams 454. A space 456 is provided between the beams 454. In other words, the bearing pad 416 is configured as a frame or honeycomb structure. Figure 8 In the configuration shown, beam 454 and space 456 are arranged symmetrically. Alternatively, beam 454 and space 456 may be arranged asymmetrically.

[0073] Similar to Figure 8 The configuration shown is Figure 9 The bearing pad 516 shown is not a solid structure. (The last sentence appears to be incomplete and possibly contains errors.) Figure 8The configuration shown differs, achieving a non-solid structure through the use of pores 558. The density of pores 558 in the portion facing the rotor 8 and the rotatable bearing surface 14 is higher than the density in the portion facing the bearing pad joint 24. The pores 558 are distributed symmetrically across the bearing pad 516. Alternatively, the pores 558 may be distributed asymmetrically.

[0074] Explanation of reference numerals in the attached figures 2 wind turbines 4 wind turbine towers 6 cabins 8 rotors 10-inch wheels 12 wind turbine blades 14 Rotatable bearing surface 16, 116, 216, 316, 416, 516 bearing pads 18 Contact Surface 20 Fixed bearing surface 22 Bearing pad support 24 Bearing Pad Joint 26. Gasket-side connector element 28 Support component side connector element 30 protrusions 32 holes 34. Reception Department Thin sections 136, 236, 240, and 336 138, 238, 338 central section 242, 342 leading edges Trailing edges 244 and 344 Floors 346 and 348 450 Contact surface portion 452 Connector Section 454 beam 456 Space 558 pores R is the radius of the rotatable bearing surface. ω0 is the angular velocity of the rotatable bearing surface in its fixed state. ω1 is the angular velocity of the rotatable bearing surface in one of its rotational states. k0 is the curvature of the fixed bearing surface in the static state of the rotatable bearing surface. k1 is the curvature of the fixed bearing surface under one of the rotational states of the rotatable bearing surface.

Claims

1. A sliding bearing for a wind turbine (2), comprising: Fixed bearing surface (20), and Rotatable bearing surface (14), wherein The fixed bearing surface (20) is configured to be non-rotatably connected to the nacelle (6) of the wind turbine (2), and The rotatable bearing surface (14) is configured to be non-rotatably connected to the rotor (8) of the wind turbine (2) and to be slidably arranged along the fixed bearing surface (20), such that the rotatable bearing surface (14) can enter a rotating state relative to the fixed bearing surface (20) from a stationary state, in which the rotatable bearing surface (14) is stationary relative to the fixed bearing surface (20), and in the rotating state, the rotatable bearing surface (14) rotates about a rotation axis relative to the fixed bearing surface (20). Its features are, At least one of the fixed bearing surface (20) and the rotatable bearing surface (14) is configured as a bearing surface capable of reversible deformation, wherein The reversibly deformable bearing surface is configured such that it interacts rotatably with the fixed bearing surface (20) through the rotatable bearing surface (14), and the profile of the reversibly deformable bearing surface in at least one of the rotational states of the rotatable bearing surface (14) is reversibly changed compared with the profile of the reversibly deformable bearing surface in the stationary state of the rotatable bearing surface (14).

2. The sliding bearing according to claim 1, characterized in that, The sliding bearing is configured as a hydrodynamic sliding bearing.

3. The sliding bearing according to claim 1 or 2, characterized in that, The rotatable bearing surface (14) is arranged radially relative to the axis of rotation inside the fixed bearing surface (20).

4. The sliding bearing according to any one of claims 1 to 3, characterized in that, The sliding bearing includes at least one deformable bearing pad (16, 116, 216, 316, 416, 516), which at least partially provides the at least one reversibly deformable bearing surface.

5. The sliding bearing according to claim 4, characterized in that, The at least one deformable bearing pad (16, 116, 216, 316, 416, 516) has a non-uniform thickness.

6. The sliding bearing according to claim 5, characterized in that, The uneven thickness varies on the circumference in a parabolic or cubic manner relative to the axis of rotation.

7. The sliding bearing according to claim 5 or 6, characterized in that, The cross-section of the at least one deformable bearing pad (216) is asymmetrical in a cutting plane parallel to the axis of rotation and / or in a cutting plane perpendicular to the axis of rotation.

8. The sliding bearing according to any one of claims 4 to 7, characterized in that, The at least one deformable bearing pad (316) has a non-uniform density.

9. The sliding bearing according to claim 8, characterized in that, The at least one deformable bearing pad (316) includes a porous structure.

10. The sliding bearing according to claim 8 or 9, characterized in that, The at least one deformable bearing pad (416) includes a frame structure.

11. The sliding bearing according to any one of claims 4 to 10, characterized in that, The at least one deformable bearing pad (316) comprises at least two different components made of at least two different materials.

12. The sliding bearing according to claim 11, characterized in that, The at least two different components are arranged in layers.

13. The sliding bearing according to claim 11 or 12, characterized in that, One of the at least two different components is or includes a leading edge relative to rotation of the rotatable bearing surface, and the other of the at least two different components is or includes a body section of the at least one deformable bearing pad.

14. The sliding bearing according to any one of claims 1 to 13, characterized in that, The reversibly deformable bearing surface includes a circularly curved portion having a first curvature (k0) in the static state, wherein the first curvature (k0) is changed to a second curvature (k1) in at least one of the rotational states.

15. A wind turbine (2), comprising a nacelle (6) and a rotor (8), characterized in that, The rotor (8) is rotatably connected to the cabin (6) via a sliding bearing according to any one of claims 1 to 14.

Images