Hydrodynamic or hydrostatic sliding bearing, method for setting a bearing play on a hydrodynamic or hydrostatic sliding bearing and wind turbine

Abstract

The invention relates to a hydrodynamic or hydrostatic sliding bearing (1) for rotatably supporting a shaft (3), in particular in a wind turbine (2), comprising at least one first sliding element (4) which has a first sliding surface (5) and is arranged on a connection structure (6) in a radially and / or axially displaceable manner, wherein a first ramp portion (7) on the at least first sliding element (4) and a corresponding second ramp portion (8) on the connection structure (6) are designed such that an axial offset of the sliding element (4) with respect to the connection structure (6) causes a radial offset of the sliding element (4), and / or vice versa, such that the bearing play of the sliding element (4) with respect to the shaft (3) can be adjusted, wherein the at least first sliding element (4) is braced against the connection structure (6) by means of at least one clamping element (9) which can be displaced with respect to the connection structure (6).

Description

[0001] a bearing clearance on a hydrodynamic or hydrostatic

[0002] Plain bearings and wind turbines

[0003] The present invention relates to a hydrodynamic or hydrostatic plain bearing for the rotatable mounting of a shaft, in particular in a wind turbine, comprising at least one first sliding element with a first sliding surface, which is arranged radially and / or axially displaceably on a connecting structure. The invention further relates to a method for adjusting bearing clearance on a hydrodynamic or hydrostatic plain bearing and to a wind turbine.

[0004] Today, rolling bearings are commonly used for rotor support in wind turbines. However, the use of plain bearings for such rotors has also been proposed, for example, in DE 102 55 745 A1.

[0005] The use of plain bearings in the field of transmission gears for wind turbines is also generally known, as shown in EP 1 184 567 A2. Another application for plain bearings in wind turbines can be a tower bearing, as is also known from DE 100 43 936 A1. Furthermore, it is also known to use plain bearings for the support of the rotor blades of a wind turbine, as is evident, for example, from DE 102005 051 912 A1.

[0006] What all possible applications of plain bearings within a wind turbine have in common is that adequate and reliable lubrication is essential for the longevity and operational reliability of such plain bearings. The oil pressure or oil pressure typically required for lubrication of the plain bearings is

[0007] For hydrostatic plain bearings, the flow rate is usually provided by an electric pump (e.g., a gear pump). Such a hydrostatic plain bearing thus has an active lubricant circuit, which is maintained by an external pump and is guided through the bearing gap between the relatively moving elements. A thin hydrostatic support film builds up in the bearing gap, reducing friction between the relatively moving elements.

[0008] In addition to hydrostatic plain bearings, hydrodynamic plain bearings are also known, in which the lubricating film is generated by the movement of the plain bearing. This is usually achieved by a wedge-like lubrication gap, so that the lubricant carried from the surface of the moving bearing part into the constriction is transmitted via the interposed lubricant film.

[0009] Such segmented, hydrostatic or hydrodynamic plain bearings represent a technically interesting solution for the rotor bearings (main bearings) of wind turbines in the 10 MW and above range. Due to the size of the turbine, rolling bearings of a size that would be challenging both in terms of manufacturing and logistics would be required. Furthermore, segmented plain bearings can potentially be replaced or repaired on the tower in the event of damage. For the proper functioning of the plain bearing, it is essential to precisely align the individual sliding elements and to set a uniform, very small clearance between the individual segments and the rotor shaft. Once the clearance has been adjusted, the bearings must be easily and securely fastened.

[0010] The object of the invention is therefore to provide a hydrodynamic or hydrostatic plain bearing that enables precise and easy-to-assemble bearing clearance adjustment and fixation of a sliding element. Furthermore, the object of the invention is to implement an optimized method for adjusting bearing clearance on a hydrodynamic or hydrostatic plain bearing and an improved wind turbine.

[0011] This object is achieved by a hydrodynamic or hydrostatic plain bearing for the rotatable mounting of a shaft, in particular in a wind turbine, with at least one first sliding element with a first sliding surface, which is arranged radially and / or axially displaceably on a connecting structure, wherein a first ramp section is formed on the at least first sliding element and a corresponding second ramp section is formed on the connecting structure such that an axial offset of the sliding element relative to the connecting structure causes a radial offset of the sliding element and / or vice versa, so that the bearing play of the sliding element relative to the shaft is adjustable.

[0012] This provides the advantage that the clamping element provides an improved possibility for the exact positioning of the sliding element on an inclined plane and a fail-safe fixation of this sliding element during operation of the plain bearing.

[0013] The plain bearing can be designed as a radial bearing or axial bearing.

[0014] The connection structure can, for example, be designed as a bearing ring. The bearing ring is particularly preferably designed as a separate component, so that the plain bearing can basically be pre-assembled in a modular manner and thus equipped with the corresponding sliding elements and used at a site. It would also be possible in principle for a bearing ring to be designed in segments. It is also conceivable for the connection structure to be formed from part of a housing. A connection structure can also be formed from part of a structure of a wind turbine. This can have the advantage that only structurally comparatively small elements of the plain bearing need to be transported into a nacelle of a wind turbine, which can bring both logistical and assembly-related advantages.

[0015] In principle, it would also be conceivable to provide a distance measuring device that is integrated in or on the sliding element and can be used during assembly work to correctly adjust the height of the sliding element.

[0016] It would also be advantageous to arrange a strain gauge on or in the sliding element in order to provide a metrological recording of the loads acting on the sliding element, so that the load acting on the sliding element to be installed can be measured and the height can be adjusted, if necessary, to the wear condition of other sliding elements present in the plain bearing, so that one sliding element is not subjected to a significantly greater load than the other sliding elements.

[0017] According to an advantageous embodiment of the invention, the sliding element can be formed from a metallic material, in particular steel. The advantage of this embodiment is that steel, in particular, exhibits good dynamic strength. Alloyed tempering steels are particularly preferred in this context. In principle, it would also be possible to form the sliding element from aluminum or an aluminum alloy.

[0018] It would also be possible to form the sliding element in one piece, in particular monolithically. This allows the sliding element to be designed to be self-retaining in a particularly advantageous manner. Alternatively, the sliding element can also be formed from several separate components. These separate components can then be connected by means of screws or welding. The sliding element can thus also be designed in several parts. In particular, it is conceivable for the sliding surface to be formed on a structurally separate part of the sliding element and, for example, to be connected to a base body of the sliding element.

[0019] The plain bearing can preferably comprise a plurality of sliding elements, each with a sliding surface. The sliding elements are preferably designed essentially identically. The high degree of uniformity allows for further reduction of manufacturing costs.

[0020] Furthermore, it may be preferred that the at least first sliding element is held clamped relative to the connecting structure by means of at least one clamping element that can be displaced relative to the connecting structure. This allows the bearing gap adjustment to be secured in a particularly secure manner against adjustment during operation of the plain bearing.

[0021] According to an advantageous embodiment of the invention, it can be provided that the connecting structure has at least one guide groove into which the at least first sliding element is inserted and the sliding element has a T-shaped section that extends out of a base body of the sliding element, wherein the guide groove is designed such that the two free ends of the T-shaped section each engage behind a guide section, so that the at least first sliding element is held captively in the guide groove in the radial direction. The advantage of this embodiment is that the sliding element can also be adjusted in an overhead situation without there being a risk of it falling out radially inwards.

[0022] According to a further preferred development of the invention, it can also be provided that the at least first sliding element can be displaced relative to the connecting structure by means of a first adjusting screw. This allows for a particularly easy-to-assemble and easily adjustable bearing clearance adjustment. The adjusting screw preferably engages directly in a bore provided in the sliding element with a corresponding internal thread.

[0023] Furthermore, according to a likewise advantageous embodiment of the invention, it can be provided that a second displaceable clamping element is arranged in the at least one guide groove next to the first displaceable clamping element, wherein the first clamping element is positioned in a first channel and the second clamping element in a second channel of the guide groove, and the first clamping element is coupled to the first free end of the T-shaped section and the second clamping element is coupled to the second free end of the T-shaped section. The advantageous effect of this embodiment is based on the fact that the two clamping elements can generate a particularly high clamping force acting on a sliding element on both sides in the circumferential direction.

[0024] In principle, it would also be possible for the first clamping element and the second clamping element to be designed as a single piece, in particular even monolithically. For example, the clamping elements can be connected to one another in a U-shaped or clamp-like manner. According to a further particularly preferred embodiment of the invention, it can be provided that the first clamping element is displaceable relative to the connecting structure by means of a second adjusting screw and / or the second clamping element is displaceable relative to the connecting structure by means of a third adjusting screw. This allows, in particular, a very precise and assembly-friendly fixation of a sliding element by the clamping elements to be achieved.

[0025] Furthermore, the invention can also be further developed such that a cover plate is fixed to the connection structure, through which the first adjusting screw and / or the second adjusting screw and / or the third adjusting screw penetrate. The removable cover plate enables, in particular, simplified assembly of the sliding element and the clamping elements, since these can first be pushed or inserted into the connection structure from one axial side and subsequently fixed via the cover plate then placed on the connection structure. In addition, it can serve to axially fix the adjusting screws. The cover plate can preferably be connected to the connection structure via a screw connection.

[0026] The adjustment screws should preferably have a screw head. It is also possible for an adjustment screw to be headless, i.e., consisting only of a threaded rod.

[0027] In a likewise preferred embodiment of the invention, it can also be provided that the first adjusting screw is secured to the cover plate by means of an adjusting nut. This allows the bearing clearance adjustment to be initially secured before the sliding element is finally fixed by the clamping element(s), which can further improve adjustability and assembly.

[0028] It may also be advantageous to further develop the invention such that the connecting structure has a hydraulic channel that can be supplied with a hydraulic fluid and opens into the ramp section of the connecting structure. The advantage that can be realized in this way is that the displacement of the sliding element along the ramp section can be simplified by lubricant introduced via the hydraulic channel. Particularly preferably, the lubricant is also pressurized, which can further simplify the displacement of the sliding element.

[0029] The object of the invention is further achieved by a method for adjusting a bearing clearance on a hydrodynamic or hydrostatic plain bearing, comprising the following steps:

[0030] • Providing at least one first sliding element with a first sliding surface and a first ramp section and a T-shaped section with two free ends, which extends out of a base body of the sliding element,

[0031] • Providing a connection structure for receiving the at least first sliding element, with a second ramp section which cooperates with the first ramp section such that an axial offset of the sliding element relative to the connection structure causes a radial offset of the sliding element and vice versa, so that the bearing play of the sliding element relative to the shaft is adjustable, and the connection structure has at least one guide groove into which the at least first sliding element can be inserted, wherein the guide groove is designed such that the two free ends of the T-shaped section each engage behind a guide section, so that the at least first sliding element is held captively in the guide groove in the radial direction,

[0032] • Provision of at least one clamping element that can be displaced relative to the connecting structure and inserted into the guide groove,

[0033] Inserting the at least first sliding element into the guide groove of the connecting structure, inserting the at least one clamping element in the guide groove,

[0034] • Adjusting the bearing play by offsetting at least the first sliding element in the guide groove

[0035] • Fixing the at least first sliding element in the set bearing play position by displacing the at least one clamping element in the guide groove relative to the connecting structure, so that the at least first sliding element is held clamped relative to the connecting structure.

[0036] Finally, the object of the invention can also be achieved by a wind turbine comprising a hydrodynamic or hydrostatic plain bearing according to one of claims 1-9 for the rotatable mounting of a shaft.

[0037] The invention will be explained in more detail below with reference to figures without limiting the general inventive concept.

[0038] It shows:

[0039] Figure 1 shows a plain bearing in a perspective view,

[0040] Figure 2 Detailed view of a sliding element in a perspective view,

[0041] Figure 3 shows a first axial sectional view through a sliding element arranged in the bearing,

[0042] Figure 4 shows a second axial sectional view through a sliding element arranged in the bearing,

[0043] Figure 5 is a tangential sectional view through the sliding element arranged in a bearing, Figure 6 is a cross-sectional view through a first embodiment of a sliding element arranged in the bearing,

[0044] Figure 7 is a cross-sectional view through a second embodiment of a sliding element arranged in the bearing,

[0045] Figure 8 shows a wind turbine with a plain bearing in a schematic representation.

[0046] Figure 1 shows a hydrodynamic or hydrostatic plain bearing 1 for the rotatable mounting of a shaft 3, in particular for a wind turbine 2, as is also shown by way of example in Figure 8. Such a wind turbine 2 typically has an electric machine 41 driven by a shaft 3 via a gear arrangement 40. In such a wind turbine 2, the shaft 3 can be rotatably mounted on a plain bearing 1, as will be explained in more detail below.

[0047] The plain bearing 1 has a plurality of essentially identical sliding elements 4, which are arranged equidistantly distributed around the circumference on the connecting structure 6 designed as a bearing ring. To avoid repetition, the functionality is explained below using the example of only one sliding element 4. It is understood that a plurality of the sliding elements 4 in the plain bearing 1, preferably all of the sliding elements 4, are constructed and function as explained below using one sliding element 4.

[0048] Figure 2 shows a first sliding element 4 with a first sliding surface 5, which is arranged on a bearing ring 6 so as to be radially and axially displaceable. A first ramp section 7 is formed on the sliding element 4 and a corresponding second ramp section 8 is formed on the bearing ring 6 such that an axial offset of the sliding element 4 relative to the bearing ring 6 causes a radial offset of the sliding element 4 and vice versa, so that the bearing play of the sliding element 4 relative to the shaft 3 is adjustable. The pitch of the axially extending ramp sections 7, 8 runs in the radial direction. The sliding element 4 is held clamped relative to the bearing ring 6 by means of at least one clamping element 9 which is displaceable relative to the bearing ring 6, which can be clearly seen from the combination of Figures 4-7 and will be explained in more detail below.

[0049] The bearing ring 6 has a guide groove 10 for each sliding element 4, into which the sliding element 4 is inserted. The sliding element 4 has a T-shaped section 11 that extends radially out of a base body 12 of the sliding element 4 and into the bearing ring 6, and whose cross-section is reminiscent of a double-T beam. The guide groove 10 is designed such that the two free ends 13a, 13b of the T-shaped section 11 each engage behind a guide section 14, so that at least the first sliding element 4 is held captively in the guide groove 10 in the radial direction, and a sliding element cannot fall out of the bearing ring 6, even in an overhead situation.

[0050] As can be seen, for example, in Figure 3 or Figure 5, the sliding element 4 can be displaced relative to the bearing ring 6 by means of a first adjusting screw 15. For this purpose, the first adjusting screw 15 engages in a corresponding bore 35 of the sliding element 4 and, by rotating the screw, causes an axial offset along the ramp sections 7, 8, so that the sliding element 4 is also radially displaced in accordance with the gradient of the ramp sections 7, 8.

[0051] As shown in Figures 5 and 6, a second movable clamping element 17 is arranged in the guide groove 10 next to the first movable clamping element 9, the first clamping element 9 being positioned in a first channel 18 and the second clamping element 17 in a second channel 19 of the guide groove 10. The first clamping element 9 is coupled to the first free end 13a of the T-shaped section 11 and the second clamping element 17 is coupled to the second free end 13b of the T-shaped section 11. Figure 5 clearly shows the wedge-like shape of the clamping elements 9, 17, which exert the corresponding clamping effect on the sliding element 4 through an axial offset. If the clamping elements 9, 17 are thus pulled in the direction of the cover plate 21 by the adjusting screws 16, 20, a corresponding bracing or tensioning acting in the axial direction takes place.Clamping of the clamping elements 9,17 with the sliding element 4, whereby the clamping elements 9,19 are supported in the circumferential direction in the guide groove 10.

[0052] The clamping elements 9, 17 each have a ramp-like section 42, which is formed on a corresponding ramp-like section 43 on the axially extending side surfaces of the free ends 13 of the T-like section 11, which can be particularly clearly seen in Figure 5. The gradient of the axially extending ramp-like sections 42, 43 runs in the circumferential direction. This has the effect that when the adjusting screws 16, 20 are tightened, the sliding element 4 is also pulled radially outward against the bottom of the guide groove 10 and clamped, which contributes to a particularly firm fit of the sliding element 4 in the guide groove 10 and enables particularly good and secure radial force transmission between the sliding element 4 and the bearing ring 6, without local stress peaks occurring at the bottom of the guide groove 10.The clamping elements 9,17 are then supported in the radial direction on the guide sections 14a, 14b in the guide groove 10.

[0053] The first clamping element 9 can be displaced relative to the bearing ring 6 by means of a second adjusting screw 16, and the second clamping element 17 can be displaced relative to the bearing ring 6 by means of a third adjusting screw 20. The adjusting screws 16, 20 then engage in a corresponding bore 36, 37 with an internal thread of a clamping element 9, 17.

[0054] By tightening the adjusting screws 16,20, the clamping elements 9,17 are clamped to the sliding element 4 in both the axial and radial directions, which leads to a particularly secure fixation of the sliding element 4 relative to the bearing ring 6 during operation of the plain bearing 1.

[0055] This fixing of the sliding element 4 is carried out after the bearing play has been correctly adjusted using the adjusting screw 15. A cover plate 21 is fixed to the bearing ring 6, through which the first adjusting screw 15, the second adjusting screw 16, and the third adjusting screw 20 pass. The cover plate 21 is in turn screwed to the bearing 6 using the locking screws 25, 26, 27. For this purpose, the cover plate 21 has a plurality of openings 28, 29, 30, 31, 32, 33, which can be clearly seen in Figure 2. As can be seen from Figure 3, the bearing 6 has a bore 34 into which a fastening screw, which is guided through the opening 31, engages.

[0056] The advantage of the cover plate 21 is that the sliding element 4 and the clamping elements 9, 17 can first be inserted into the guide groove 10 from an axial direction. The corresponding front-end opening of the guide groove can then be closed by the cover plate 21, and the bearing clearance can be adjusted and fixed.

[0057] The adjusting screw 15 can be counter-tightened by means of an adjusting nut 22 on the cover plate 21 in order to secure a bearing play adjustment before the final fixing via the clamping elements 9,17 takes place.

[0058] As shown in Figure 3, the bearing ring 6 can have a hydraulic channel 23 which can be supplied with a hydraulic fluid 24 and which opens into the ramp section 8 of the bearing ring 6.

[0059] In the embodiment of Figure 7, the base body 12 is also penetrated in the radial direction by a hydraulic channel 38, which is located in an axially extending hydraulic channel 39 that is open toward the sliding surface 5. Figure 8 also clearly shows the asymmetrical design of the sliding element 4, which is particularly well suited for a hydrodynamic plain bearing 1.

[0060] A method for adjusting the bearing clearance on the hydrodynamic or hydrostatic plain bearing 1 may now comprise the following steps:

[0061] First, at least one first sliding element 4 is provided with a first sliding surface 5 and a first ramp section 7 as well as a T-like section 11 with two free ends 13a, 13b, which extends out of a base body 12 of the sliding element 4.

[0062] Furthermore, a bearing ring 6 is provided for receiving the at least first sliding element 4, with a second ramp section 8 which interacts with the first ramp section 7 in such a way that an axial offset of the sliding element 4 relative to the bearing ring 6 causes a radial offset of the sliding element 4 and vice versa, so that the bearing play of the sliding element 4 relative to the shaft 3 is adjustable, and the bearing ring 6 has at least one guide groove 10 into which the at least first sliding element 4 can be inserted, wherein the guide groove 10 is designed such that the two free ends 13a, 13b of the T-shaped section 11 each engage behind a guide section 14, so that the at least first sliding element 4 is held captively in the guide groove 10 in the radial direction.

[0063] At least one clamping element 9 is also provided, which can be displaced relative to the bearing ring 6 and inserted into the guide groove 10.

[0064] The sliding element 4 is then inserted into the guide groove 10 of the bearing ring 6, along with at least one clamping element 9 in the guide groove 10, and the guide groove 10 is then closed by the cover plate 21. First, the bearing clearance is adjusted by offsetting at least the first sliding element 4 in the guide groove 10. For this purpose, the adjusting screw 15 can be turned. Additionally, pressurized hydraulic fluid 24 can be passed through the hydraulic channel 23 to facilitate the adjustment process by appropriately lubricating the ramp sections 7, 8.

[0065] Once the bearing clearance is correctly adjusted, the position of the adjusting screw 15 and thus also of the sliding element 4 relative to the bearing ring 6 can be fixed by locking the adjusting nut 22. However, this fixation is not sufficient for the loads occurring during operation of the plain bearing 1.

[0066] Therefore, the sliding element 4 is now held in the set bearing clearance position by

[0067] By displacing the clamping element 9 in the guide groove 10 relative to the bearing ring 6, it is finally fixed, so that at least the first sliding element 4 is held clamped relative to the bearing ring 6. Here, too, the clamping element 9 is tightened by an adjusting screw 16. This adjusting screw 16 is, of course, still loose when the bearing play is adjusted using the adjusting screw 15, so that the bearing play adjustment is not hindered by the clamping element 9.

[0068] The invention is not limited to the embodiments illustrated in the figures. The above description is therefore not to be considered restrictive, but rather explanatory. The following claims are to be understood in such a way that a stated feature is present in at least one embodiment of the invention. This does not exclude the presence of further features. Where the claims and the above description define 'first' and 'second' features, this designation serves to distinguish between two similar features without establishing a priority.

[0069] List of reference symbols

[0070] 1 plain bearing

[0071] 2 wind turbines

[0072] 3 Wave

[0073] 4 sliding element

[0074] 5 Sliding surface

[0075] 6 Connection structure / bearing ring

[0076] 7 Ramp section

[0077] 8 Ramp section

[0078] 9 clamping element

[0079] 10 guide groove

[0080] Section 11

[0081] 12 basic bodies

[0082] 13 endings

[0083] 14 Guide section

[0084] 15 Adjusting screw

[0085] 16 Adjusting screw

[0086] 17 clamping element

[0087] 18 channel

[0088] 19 Channel

[0089] 20 Adjusting screw

[0090] 21 Cover plate

[0091] 22 Adjusting nut

[0092] 23 Hydraulic channel

[0093] 24 Hydraulic fluid

[0094] 25 Locking screw

[0095] 26 Locking screw

[0096] 27 Locking screw

[0097] 28 Opening

[0098] 29 Opening

[0099] 30 Opening

[0100] 31 Opening

[0101] 32 Opening 33 Opening

[0102] 34 Hole

[0103] 35 bore

[0104] 36 Hole 37 Hole

[0105] 38 Hydraulic channel

[0106] 39 Hydraulic channel

[0107] 40 Gear arrangement

[0108] 41 electrical machine 42 section

[0109] Section 43

Claims

Claims 1. Hydrodynamic or hydrostatic plain bearing (1) for the rotatable mounting of a shaft (3), in particular in a wind turbine (2), with at least one first sliding element (4) with a first sliding surface (5), which is arranged radially and / or axially displaceably on a connecting structure (6), characterized in that a first ramp section (7) is formed on the at least first sliding element (4) and a corresponding second ramp section (8) is formed on the connecting structure (6) in such a way that an axial offset of the sliding element (4) relative to the connecting structure (6) causes a radial offset of the sliding element (4) and / or vice versa, so that the bearing play of the sliding element (4) relative to the shaft (3) is adjustable.

2. Plain bearing (1) according to claim 1, characterized in that the at least first sliding element (4) is held clamped relative to the connecting structure (6) by means of at least one clamping element (9) which can be displaced relative to the connecting structure (6).

3. Plain bearing (1) according to claim 1 or 2, characterized in that the connecting structure (6) has at least one (extending in the axial direction) guide groove (10) into which the at least first sliding element (4) is inserted and the sliding element (4) has a T-shaped section (11) which extends out of a base body (12) of the sliding element (4), wherein the guide groove (10) is designed such that the two free ends (13a, 13b) of the T-shaped section (11) each have a guide section (14) engage behind, so that the at least first sliding element (4) is held captively in the guide groove (10) in the radial direction.

4. Plain bearing (1) according to one of the preceding claims, characterized in that the at least first sliding element (4) is displaceable relative to the connecting structure (6) by means of a first adjusting screw (15).

5. Plain bearing (1) according to one of the preceding claims, characterized in that a second displaceable clamping element (17) is arranged in the at least one guide groove (10) next to the first displaceable clamping element (9), wherein the first clamping element (9) is positioned in a first channel (18) and the second clamping element (17) is positioned in a second channel (19) of the guide groove (10), and the first clamping element (9) is coupled to the first free end (13a) of the T-shaped section (11) and the second clamping element (17) is coupled to the second free end (13b) of the T-shaped section (11).

6. Plain bearing (1) according to one of the preceding claims, characterized in that the first clamping element (9) is displaceable relative to the connecting structure (6) by means of a second adjusting screw (16) and / or the second clamping element (17) is displaceable relative to the connecting structure (6) by means of a third adjusting screw (20).

7. Plain bearing (1) according to one of the preceding claims, characterized in that a cover plate (21) is fixed to the connecting structure (6), through which the first adjusting screw (15) and / or the second adjusting screw (16) and / or the third adjusting screw (20) pass.

8. Plain bearing (1) according to claim 7, characterized in that the first adjusting screw (15) is counter-locked to the cover plate (21) by means of an adjusting nut (22).

9. Plain bearing (1) according to one of the preceding claims, characterized in that the connecting structure (6) has a hydraulic channel (23) which can be supplied with a hydraulic fluid (24) and which opens into the ramp section (8) of the connecting structure (6).

10. Method for adjusting a bearing clearance on a hydrodynamic or hydrostatic plain bearing (1), comprising the following steps: • Providing at least one first sliding element (4) with a first sliding surface (5) and a first ramp section (7) as well as a T-shaped section (11) with two free ends (13a, 13b) extending from a base body (12) of the sliding element (4), • Provision of a connection structure (6) for receiving the at least first sliding element (4), with a second ramp section (8) which cooperates with the first ramp section (7) in such a way that an axial offset of the sliding element (4) relative to the connection structure (6) causes a radial offset of the sliding element (4) and vice versa, so that the bearing play of the sliding element (4) relative to the shaft (3) is adjustable, and the connection structure (6) has at least one guide groove (10) into which the at least first sliding element (4) can be inserted, wherein the guide groove (10) is designed in such a way that the two free ends (13a, 13b) of the T-shaped section (11) each engage behind a guide section (14) so ​​that the at least first Sliding element (4) is held captively in the guide groove (10) in the radial direction, • Provision of at least one clamping element which can be displaced relative to the connecting structure (6) and inserted into the guide groove (10) (9), • Inserting at least the first sliding element (4) into the guide groove (10) the connection structure (6), • Inserting at least one clamping element (9) into the guide groove (10), • Adjusting the bearing play by offsetting at least the first sliding element (4) in the guide groove (10) • Fixing the at least first sliding element (4) in the set bearing clearance position by displacing the at least one clamping element (9) in the guide groove (10) relative to the connecting structure (6), so that the at least first sliding element (4) is held clamped relative to the connecting structure (6). A wind turbine (2) comprising a hydrodynamic or hydrostatic plain bearing (1) according to one of claims 1-9 for the rotatable mounting of a shaft (3).

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