Bearing adjusting device, shaft system and wind generating set
The bearing adjustment device with a power loading assembly and control system addresses the issue of fixed ring creep by maintaining optimal load conditions and preventing bearing damage through buffering adjustments.
Patent Information
- Application Number
- CN202310806342.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-30
- Publication Date
- 2024-12-31
AI Technical Summary
The fixed ring in a bearing can creep relative to the bearing seat, leading to increased friction, potential bearing overload, and damage due to excessive operating loads, especially when foreign matter enters the bearing or lubrication is insufficient.
A bearing adjustment device with a power loading assembly and control system that applies a load to the fixed ring and bearing seat in the circumferential direction, using push blocks and a controller to maintain the rated operating load threshold and prevent creep, while detecting and adjusting for abnormal conditions.
Prevents bearing damage by maintaining optimal load conditions and providing buffering adjustments, reducing wear and preventing overloads, thus ensuring stable operation of the shaft system.
Smart Images
Figure CN119222259A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of rotating shaft supporting structures, and more specifically, to a shaft system and a wind turbine generator set. Background Art
[0002] Typically, the shaft is rotatably supported on the bearing seat by a bearing, the shaft is mounted to the moving ring of the bearing, and the fixed ring of the bearing is fixed to the bearing seat. During the rotation of the shaft, the operating load of the shaft acts between the moving ring and the fixed ring of the bearing, and then acts between the fixed ring and the bearing seat. However, if the load between the fixed ring and the bearing seat is too large, it is easy to cause the fixed ring to creep relative to the bearing seat. This creep can cause the bearing to run around, which can cause wear or even damage to the bearing, affecting normal operation. For example, if foreign matter enters the space between the fixed ring and the moving ring and contacts the roller, or if the bearing lubricant is insufficiently supplied, the friction between the roller and the outer ring will increase, and the operating load of the bearing will increase suddenly accordingly. The increased operating load may exceed the rated operating load of the bearing and cause the bearing to overload, or even exceed the bearing's stuck limit load and cause the bearing to be unable to continue to operate. If the bearing overload and bearing sticking continue to occur, it will cause damage to the bearing and even damage to the components connected to the bearing. Summary of the invention
[0003] Therefore, an object of the present disclosure is to provide a bearing adjustment device, a shaft system and a wind turbine generator set that can prevent the fixed ring from creeping relative to the bearing seat in the circumferential direction.
[0004] According to one aspect of the present disclosure, there is provided a bearing adjustment device for installation in a shaft system, the shaft system comprising a rotating shaft, a bearing and a bearing seat, the rotating shaft being rotatably mounted on the bearing seat via the bearing, the bearing adjustment device for being arranged between the bearing seat and the fixed ring of the bearing and comprising a power loading assembly, the power loading assembly comprising a fixed end and a loading end capable of moving relative to the fixed end, the fixed end and the loading end for being arranged between the bearing seat and the fixed ring of the bearing along the circumferential direction of the bearing, for applying a load to the bearing seat and the fixed ring along the circumferential direction, so that the two ends of the bearing adjustment device in the circumferential direction are pressed against the fixed ring and the bearing seat respectively.
[0005] Preferably, the bearing adjustment device may also include: a first push block and a second push block, which are respectively arranged on both sides of the power loading assembly in the circumferential direction, the first push block can abut against one of the bearing seat and the fixed ring, and the second push block can abut against the other of the bearing seat and the fixed ring, and the first push block and the second push block can move away from each other in the circumferential direction of the bearing under the action of the power loading assembly, thereby applying a load to the fixed ring and the bearing seat.
[0006] Preferably, the bearing adjustment device may also include: a pressure detection device, arranged between the bearing seat and the fixed ring or between the first push block and the power loading assembly, for detecting the load of the shaft system in the circumferential direction during the rotation of the moving ring of the bearing; a controller, configured to: control the load applied by the power loading assembly until the load detected by the pressure detection device meets the rated operating load threshold condition of the shaft system.
[0007] Preferably, the controller can also be configured to: in response to the load detected by the pressure detection device exceeding the rated operating load threshold and being lower than the sticking limit load of the bearing, control the power loading assembly to load until the load detected by the pressure detection device recovers to meet the rated operating load threshold condition.
[0008] Preferably, the controller may be further configured to: issue a warning signal in response to the load detected by the pressure detection device exceeding the stuck limit load.
[0009] Preferably, the controller may also be configured to: before the load detected by the pressure detection device satisfies the rated operating load threshold condition, control the power loading assembly to load a load greater than or equal to the load detected by the pressure detection device.
[0010] Preferably, the bearing adjustment device may further include a displacement detection device, which is used to detect the real-time relative displacement between the bearing seat and the fixed ring in the circumferential direction, wherein the controller is further configured to: record the detection value of the displacement detection device as the initial displacement value when the load detected by the pressure detection device meets the rated operating load threshold condition, and before the load detected by the pressure detection device recovers to meet the rated operating load threshold condition, adjust the load loaded by the power loading assembly based on the deviation between the real-time relative displacement detected by the displacement detection device and the initial displacement value.
[0011] Preferably, the end of the first push block facing the second push block may have an insert block, and the second push block may have a concave cavity and a socket connecting the concave cavity with the outside, wherein the power loading assembly is arranged in the concave cavity, and the insert block is inserted into the socket and abuts against the power loading assembly.
[0012] Preferably, the first push block and the second push block may have a first lug and a second lug respectively, and the first lug is used to be inserted into a first socket formed in the bearing seat, and the second lug is used to be inserted into a second socket formed in the fixed ring.
[0013] According to another aspect of the present disclosure, a shaft system is provided, which includes a rotating shaft, a bearing and a bearing seat, the rotating shaft is rotatably mounted to the bearing seat through the bearing, preferably, the shaft system also includes a bearing adjustment device as described above, and the bearing adjustment device is installed between the fixed ring of the bearing and the bearing seat.
[0014] Preferably, one of the two surfaces of the bearing seat and the fixed ring facing each other in the radial direction may have a protrusion protruding along the radial direction, and the other may have a recess corresponding to the protrusion, wherein an installation groove is formed between the protrusion and the recess in the circumferential direction, and the bearing adjustment device is installed in the installation groove.
[0015] Preferably, the mounting groove may have a first annular side wall and a second annular side wall in the annular direction, one of the first annular side wall and the second annular side wall is formed on the fixed ring, and the other is formed on the bearing seat, wherein the bearing adjustment device is arranged between the first annular side wall and the second annular side wall along the annular direction, and a thrust is loaded along the annular direction to move the fixed ring and the bearing seat away from each other.
[0016] Preferably, one of the two surfaces of the bearing seat and the fixed ring facing each other in the radial direction may have a plurality of protrusions protruding along the radial direction, and the other may have a plurality of recesses corresponding to the plurality of protrusions, and each of the plurality of mounting grooves is formed between the corresponding protrusions and recesses, and the plurality of bearing adjustment devices are respectively installed in the plurality of mounting grooves.
[0017] Preferably, in the circumferential direction of the shaft system, the loading end of at least one of the plurality of bearing adjustment devices can load the load in the opposite direction to the loading ends of the other bearing adjustment devices.
[0018] According to another aspect of the present disclosure, a wind turbine generator set is provided, comprising a generator and the shaft system as described above, wherein the rotating shaft is a main shaft of the generator.
[0019] The bearing adjustment device can prevent the fixed ring from creeping relative to the bearing seat in the circumferential direction, thereby avoiding bearing damage. In addition, when the bearing is in an abnormal state and the shaft system operating load increases, the bearing adjustment device can also perform buffering adjustment in the circumferential direction to prevent bearing damage or even affect operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The above and other aspects, features and other advantages of the present disclosure will become clear and more easily understood through the following detailed description of exemplary embodiments in conjunction with the accompanying drawings, in which:
[0021] Figure 1 is a three-dimensional schematic diagram showing that the fixed ring of the bearing is installed in the bearing seat;
[0022] Figure 2 is a schematic cross-sectional view showing the bearing installed in the bearing seat;
[0023] Figure 3 It is shown Figure 2 An enlarged schematic diagram of part I in FIG.
[0024] Figure 4 is a three-dimensional schematic diagram showing a bearing adjustment device;
[0025] Figure 5 is a perspective schematic diagram showing a protrusion formed on the outer peripheral surface of the fixed ring;
[0026] Figure 6 is a perspective schematic diagram showing a recessed portion formed in the inner peripheral surface of the bearing seat;
[0027] Figure 7 2 is a schematic cross-sectional view showing a bearing adjustment device.
[0028] Description of reference numerals:
[0029] 10: bearing, 11: fixed ring, 12: moving ring, 13: roller, 14: protrusion, 141: second socket, 15: recess, 151: first socket, 16: protrusion, 17: recess, 18: accommodating groove, 20: bearing seat, 21: first annular side wall, 22: second annular side wall, 30: bearing adjustment device, 30a: first bearing adjustment device, 30b: second bearing adjustment device, 30c: third bearing adjustment device, 30d: fourth bearing adjustment device, 31: power loading assembly, 32: pressure detection device, 33: controller, 34: displacement detection device, 35: first push block, 351: first lug, 352: insert block, 36: second push block, 361: second lug. DETAILED DESCRIPTION
[0030] In order to enable those skilled in the art to better understand the technical concept of the present disclosure, the specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be clear that in the following description of the embodiments and the accompanying drawings, the same reference numerals are used to indicate the same or similar components, and repeated descriptions are omitted.
[0031] Figure 1 It is a three-dimensional schematic diagram showing that the fixed ring of the bearing is installed in the bearing seat. Figure 2 1 is a cross-sectional schematic diagram showing a bearing installed in a bearing seat, wherein a fixed ring of the bearing is installed on the inner peripheral surface of the bearing seat. Figure 3 It is shown Figure 2 Magnified view of part I in FIG. Figure 4 2 is a perspective schematic diagram showing a bearing adjustment device. Figure 5 1 is a perspective schematic diagram showing protrusions formed on the outer peripheral surface of the fixed ring. Figure 6 is a perspective schematic diagram showing a recessed portion formed in the inner peripheral surface of the bearing seat. Figure 7 2 is a schematic cross-sectional view showing a bearing adjustment device.
[0032] like Figure 1 and Figure 2 As shown, the shaft system includes a bearing 10, a rotating shaft (not shown) and a bearing seat 20, and the rotating shaft is rotatably mounted on the bearing seat 20 through the bearing 10. The bearing 10 includes a fixed ring 11, a movable ring 12, a roller 13 rolling between the fixed ring 11 and the movable ring 12, and a retaining frame for retaining the roller 13 between the fixed ring 11 and the movable ring 12. The movable ring 12 is fixed to the rotating shaft to rotate with the rotating shaft, and the fixed ring 11 is mounted to the bearing seat 20 to provide support for the rotational movement of the movable ring 12 and the rotating shaft. In an embodiment of the present disclosure, a bearing adjustment device 30 is provided between the fixed ring 11 of the bearing 10 and the bearing seat 20, and will be described in detail below with reference to the accompanying drawings.
[0033] Bearing adjustment device
[0034] like Figure 1 and Figure 2 As shown, the bearing adjustment device 30 is used to be arranged between the bearing seat 20 and the fixed ring 11 of the bearing 10, and includes a power loading assembly 31. The power loading assembly 31 includes a fixed end and a loading end that can move relative to the fixed end. The fixed end and the loading end are used to be arranged between the bearing seat 20 and the fixed ring 11 of the bearing 10 along the circumferential direction of the bearing 10, and are used to apply a load to the bearing seat 20 and the fixed ring 11 along the circumferential direction, so that the two ends of the bearing adjustment device 30 in the circumferential direction are pressed against the fixed ring 11 and the bearing seat 20 respectively. By loading the load through the power loading assembly 31, it is possible to prevent the fixed ring 11 from creeping relative to the bearing seat 20 in the circumferential direction. For example, Figure 3 As shown, after the bearing adjustment device 30 is installed between the fixed ring 11 and the bearing seat 20, the power loading assembly 31 can be extended to press the two ends of the bearing adjustment device 30 in the circumferential direction against the fixed ring 11 and the bearing seat 20, respectively, so as to fasten and assemble the fixed ring 11 and the bearing seat 20. In addition, as the shaft system runs, the load on the fixed ring 11 may increase, and the increased load may cause the fixed ring 11 to move in the circumferential direction in a direction close to the bearing seat 20 (described in detail later).
[0035] In some embodiments, the load is applied to the bearing seat 20 and the fixed ring 11 along the circumferential direction, and the load may be applied along the tangential direction of the fixed ring, so that the two ends of the bearing adjustment device 30 in the circumferential direction are pressed against the fixed ring 11 and the bearing seat 20 respectively.
[0036] Specifically, Figure 7 Shown and combined Figure 3 The bearing adjustment device 30 may further include a first push block 35 and a second push block 36, and the first push block 35 and the second push block 36 are respectively arranged on both sides of the power loading assembly 31 in the circumferential direction, the first push block 35 abuts against the bearing seat 20, and the second push block 36 abuts against the fixed ring 11. The first push block 35 and the second push block 36 can move away from each other in the circumferential direction of the bearing 10 under the action of the power loading assembly 31, thereby applying a load to the fixed ring 11 and the bearing seat 20. However, the embodiments of the present disclosure are not limited thereto, and the first push block 35 may also abut against the fixed ring 11, and the second push block 36 abuts against the bearing seat 20.
[0037] In addition, if Figure 7As shown, the first push block 35 has an insert block 352 at one end facing the second push block 36, and the second push block 36 has a concave cavity and a plug hole that connects the concave cavity to the outside. The power loading assembly 31 can be arranged in the concave cavity, and the insert block 352 is inserted into the plug hole and abuts against the power loading assembly 31. In addition, the bearing adjustment device 30 can also include a pressure detection device 32 and a controller 33. The two sides of the pressure detection device 32 in the circumferential direction respectively abut the insert block 352 and the power loading assembly 31, and are arranged in the insert block 352 and the power loading assembly 31. In addition, the bearing adjustment device 30 can also include a displacement detection device 34, which can be arranged in the surface of the second push block 36 facing the first push block 35 to detect the real-time relative displacement of the first push block 35 relative to the second push block 36 in the circumferential direction. The displacement detection device 34 can be a displacement sensor, but the displacement detection device 34 can also have other forms, such as laser ranging.
[0038] Alternatively, if Figure 3 and Figures 5 to 7 As shown, the first push block 35 and the second push block 36 respectively have a first lug 351 and a second lug 361 , and the first lug 351 is used to be inserted into the first socket 151 formed in the bearing seat 20 , and the second lug 361 is used to be inserted into the second socket 141 formed in the fixed ring 11 .
[0039] However, the embodiments of the present disclosure are not limited thereto, and the bearing adjustment device 30 may not include the first push block 35 and the second push block 36, and the pressure detection device 32 and the power loading assembly 31 may directly abut the fixed ring 11 and the bearing seat 20. In addition, the pressure detection device 32 may be arranged only in one of the second push block 36 and the power loading assembly 31 and contact the other, or the pressure detection device 32 may be arranged between the first push block 35 and the bearing seat 20, between the power loading assembly 31 and the first push block 35, or between the second push block 36 and the fixed ring 11 in the circumferential direction, as long as the pressure detection device 32 is arranged between the bearing seat 20 and the fixed ring 11 and can detect the load of the shaft system in the circumferential direction. In addition, the displacement detection device 34 and the controller 33 may be installed at a suitable position on the bearing seat 20 or the fixed ring 11, as long as the displacement detection device 34 can detect the relative displacement between the bearing seat 20 and the fixed ring 11 in the circumferential direction and the controller 33 can communicate with the detection element and the actuator.
[0040] In an embodiment of the present disclosure, the controller 33 may be configured to: control the load applied by the power loading assembly 31 until the load detected by the pressure detection device 32 meets the rated operating load threshold condition of the shaft system. The load detected by the pressure detection device 32 is the operating load of the shaft system during operation (hereinafter referred to as "shaft system operating load"), for example, the bearing operating load, the shaft operating load, the load of the components connected to the shaft acting on the shaft, etc. The rated operating load threshold condition of the shaft system may refer to the load range allowed for the normal operation of the shaft system, which is determined according to parameters such as bearing life during the design of the shaft system; it may also refer to a predetermined value in the above load range. By adjusting the load loaded by the power loading assembly 31 between the fixed ring 11 and the bearing seat 20 to meet the rated operating load threshold condition of the shaft system, it is possible to ensure that the fixed ring 11 is tightened relative to the bearing seat 20 during the normal operation of the shaft system, and prevent the fixed ring 11 from rotating relative to the bearing seat 20 and causing a running circle phenomenon.
[0041] Generally, if an abnormal condition occurs in the bearing (for example, foreign matter enters the space between the fixed ring 11 and the movable ring 12 and contacts the roller 13 or the retaining cage, or the bearing lubricant is insufficiently supplied), the friction between the roller 13 and the fixed ring 11 increases, causing the shaft system operating load to increase and the force between the fixed ring 11 and the bearing seat 20 to increase. The increased shaft system operating load may exceed the rated operating load of the shaft system, or even exceed the sticking limit load of the bearing 10, causing the bearing 10 to be unable to continue to operate.
[0042] In an embodiment of the present disclosure, the controller 33 may also be configured to: in response to the load detected by the pressure detection device 32 exceeding the rated operating load threshold of the shaft system and being lower than the jamming limit load of the bearing 10, control the power loading assembly 31 to load until the load detected by the pressure detection device 32 recovers to satisfy the rated operating load threshold condition of the shaft system; in response to the load detected by the pressure detection device 32 exceeding the jamming limit load, issue a warning signal; before the load detected by the pressure detection device 32 recovers to satisfy the rated operating load threshold condition of the shaft system, control the power loading assembly 31 to load a load greater than or equal to the load detected by the pressure detection device 32.
[0043] When the shaft system operating load exceeds the jam limit load of the bearing 10, the controller 33 sends a warning signal. In response to the warning signal, the shaft can be stopped to prevent the shaft from continuing to rotate and causing serious damage to the bearing 10.
[0044] In the case where the shaft system operating load exceeds the rated operating load threshold of the shaft system and is lower than the stuck limit load of the bearing 10, as described above, the controller 33 controls the power loading assembly 31 to load until the shaft system operating load is restored to meet the rated operating load threshold condition (for example, until the foreign matter leaves between the fixed ring 11 and the moving ring 12 or the foreign matter is crushed without affecting the operation of the bearing 10, or until the bearing 10 is supplied with a sufficient amount of bearing lubricant). In the process of the power loading assembly 31 loading the load, the load loaded by the power loading assembly 31 increases and then decreases along with the shaft system operating load (for example, in the case where the foreign matter enters the interior of the bearing and then leaves, the shaft system operating load increases and then decreases), until the load acting between the fixed ring 11 and the bearing seat 20 in the circumferential direction is restored to meet the rated operating load threshold condition. In addition, by carrying out the above-mentioned loading process, it is possible to prevent the roller 13 and the retaining frame for supporting the roller 13 from being damaged due to the increase of the friction between the roller 13 and the fixed ring 11 and / or the irregular movement of the roller 13 between the fixed ring 11 and the movable ring 12, prevent the rollers 13 from being damaged by colliding with each other, prevent the rollers 13 from damaging other components (for example, the retaining frame for supporting the roller 13), and prevent the bearing from being damaged due to continuous overload operation.
[0045] Specifically, Figure 3 Shown and combined Figure 2 and Figure 7 , the shaft rotates counterclockwise, and the fixed ring 11 pushes the bearing adjustment device 30 in the counterclockwise direction and then pushes the bearing seat 20. If the bearing has an abnormal condition and the friction between the roller 13 and the fixed ring 11 increases, the fixed ring 11 further pushes the bearing adjustment device 30 in the counterclockwise direction, causing the fixed ring 11 to further approach the bearing seat 20 in the circumferential direction. At this time, the power loading component 31 increases the loading load, so that the fixed ring 11 moves away from the bearing seat 20 in the clockwise direction in the circumferential direction to achieve the above-mentioned loading adjustment process. In addition, before the load detected by the pressure detection device 32 returns to the rated operating load threshold condition (that is, during the loading process of the power loading component 31), the power loading component 31 can load a load equal to the load detected by the pressure detection device 32, so that the load loaded by the power loading component 31 changes with the shaft system operating load. In addition, during the loading process of the power loading assembly 31, the loading load of the power loading assembly 31 can also be greater than the load detected by the pressure detection device 32, so as to achieve a certain buffering function, thereby further preventing the roller 13 and the cage from being damaged. Since the load loaded by the power loading assembly 31 is greater than the load detected by the pressure detection device 32, the speed at which the fixed ring 11 approaches the bearing seat 20 can be slowed down, thereby achieving the above-mentioned buffering adjustment function.
[0046] In addition, the controller 33 may also be configured to record the detection value of the displacement detection device 34 as the initial displacement value when the load detected by the pressure detection device 32 meets the rated operating load threshold condition of the shaft system, and adjust the load loaded by the power loading component 31 based on the deviation between the real-time relative displacement detected by the displacement detection device 34 and the initial displacement value before the load detected by the pressure detection device 32 is restored to meet the rated operating load threshold condition. That is, during the loading adjustment process of the power loading component 31, the power loading component 31 may be loaded according to the deviation between the real-time relative displacement detected by the displacement detection device 34 and the initial displacement value. For example, the power loading component 31 may be loaded exponentially based on the offset. The exponential loading process may correspond to the above-mentioned buffer loading process in which the power loading component 31 is loaded with a load greater than the detection value of the pressure detection device 32. Compared with the case where the power loading component is proportionally loaded based on the offset, the exponential loading process may prevent the friction between the roller 13 and the fixed ring 11 from increasing and / or the roller 13 from irregularly moving between the fixed ring 11 and the moving ring 12. During the buffer loading process, when the shaft system operating load increases, the power loading component 31 performs buffer loading based on the above-mentioned offset; when the shaft system operating load decreases, the power loading component 31 first performs buffer loading based on the above-mentioned offset until the shaft system operating load decreases to the rated operating load, and then the power loading component 31 stops buffer loading and loads a load equal to the rated operating load.
[0047] In addition, the controller 33 can record the detection values of the pressure detection device 32 and the displacement detection device 34. By recording these detection values in real time, more accurate shaft system operating condition data can be obtained, and these data can be used for subsequent shaft system development and design, shaft system experiments and shaft system optimization, so as to obtain a shaft system that better meets performance requirements. These data can also be used for shaft system control, early warning, avoidance of problems, and reduction of loss risks.
[0048] Shafting
[0049] The shaft system according to the embodiment of the present disclosure includes, in addition to the rotating shaft, the bearing 10 and the bearing seat 20 , the bearing adjustment device 30 as described above, which is installed between the fixed ring 11 of the bearing 10 and the bearing seat 20 .
[0050] In addition, one of the two surfaces of the bearing seat 20 and the fixed ring 11 facing each other in the radial direction has a protrusion 14 protruding in the radial direction, and the other has a recess 15 corresponding to the protrusion 14. After the fixed ring 11 and the bearing seat 20 are fastened and assembled, the protrusion 14 and the recess 15 contact each other in the radial direction to prevent the fixed ring 11 from moving relative to the bearing seat 20 in the radial direction. An installation groove is formed between the protrusion 14 and the recess 15 in the circumferential direction. The bearing adjustment device 30 is installed in the installation groove.
[0051] In addition, the mounting groove has a first annular side wall 21 and a second annular side wall 22 in the annular direction, one of which is formed on the fixed ring 11 and the other is formed on the bearing seat 20. The bearing adjustment device 30 is arranged between the first annular side wall 21 and the second annular side wall 22 along the annular direction, and loads a thrust force along the annular direction that causes the fixed ring 11 and the bearing seat 20 to move relatively away from each other.
[0052] like Figure 5 and Figure 6 As shown, the protrusion 14 is formed on the outer peripheral surface of the fixed ring 11, and the recess 15 is formed on the inner peripheral surface of the bearing seat 20. The first annular side wall 21 is formed on the fixed ring 11 (more specifically, the protrusion 14 on the outer peripheral surface of the fixed ring 11), and the second annular side wall 22 is formed on the bearing seat 20 (more specifically, the recess 15 in the inner peripheral surface of the bearing seat 20).
[0053] In addition, a plurality of mounting grooves as described above may be provided between the bearing seat 20 and the fixed ring 11, and a plurality of bearing adjustment devices 30 are respectively disposed in the plurality of mounting grooves. The loading end of at least one of the plurality of bearing adjustment devices 30 is loaded in the opposite direction to the loading ends of the other bearing adjustment devices 30.
[0054] Specifically, Figure 2 As shown, four mounting grooves (i.e., a first mounting groove, a second mounting groove, a third mounting groove, and a fourth mounting groove) are provided between the bearing seat 20 and the fixed ring 11, and a first bearing adjustment device 30a, a second bearing adjustment device 30b, a third bearing adjustment device 30c, and a fourth bearing adjustment device 30d are provided in the first mounting groove, the second mounting groove, the third mounting groove, and the fourth mounting groove, respectively. The four mounting grooves are evenly distributed along the circumferential direction.
[0055] Specifically, Figure 1 and Figure 2As shown, the bearing seat 20 has a bearing mounting hole, and the bearing 10 is mounted in the bearing mounting hole. When the central axis of the bearing 10 extends in the horizontal direction, a protrusion 16 is provided on the outer circumferential surface of the fixed ring 11, and the protrusion 16 is located directly below the central axis of the bearing 10. A corresponding recess 17 is formed on the bearing seat 20, and the protrusion 16 is embedded in the recess 17. The angle of the protrusion 16 in the circumferential direction is 90 degrees to 120 degrees, and the protrusion 16 is symmetrically arranged about the central axis of the fixed ring 11 in the circumferential direction. The protrusion 16 can be used to strengthen the fixed ring 11 to prevent the lower part of the fixed ring 11 from being easily worn or even damaged due to the gravity of the shaft system and the operating load of the shaft system.
[0056] exist Figure 2 In the embodiment, the two protrusions 14 located at the upper part have a wedge shape and thus have only one circumferential side wall in the circumferential direction. Accordingly, each of the second mounting groove and the third mounting groove located at the upper part may be formed between one protrusion 14 and one recess 15. Figure 2 In the embodiment, the protruding portion 16 located at the lower portion has two annular side walls opposite to each other in the annular direction, so each of the first mounting groove and the fourth mounting groove located at the lower portion can be formed between the protruding portion 16 and the recessed portion 17. Wherein, in the case where the first annular side wall 21 is formed on the fixed ring 11 (more specifically, formed on the protrusion 14 and the protruding portion 16), the first annular side wall 21 of the fourth mounting groove accommodating the fourth bearing adjustment device 30d faces the opposite direction to the first annular side walls 21 of the remaining mounting grooves. Specifically, the first annular side wall 21 of the fourth mounting groove accommodating the fourth bearing adjustment device 30d faces the clockwise direction, while the first annular side walls 21 of the remaining mounting grooves face the counterclockwise direction.
[0057] After the first to fourth bearing adjustment devices 30a to 30d are installed in the first to fourth installation grooves, respectively, the power loading assembly 31 of each of the first to third bearing adjustment devices 30a to 30c can be extended to press the two ends of the bearing adjustment device in the circumferential direction against the fixed ring 11 and the bearing seat 20, respectively, so as to pre-tighten and assemble the fixed ring 11 and the bearing seat 20. At this time, the power loading assembly 31 of the fourth bearing adjustment device 30d located in the fourth installation groove can load a load equal to the rated operating load of the shaft system.
[0058] When the shaft rotates counterclockwise, the moving ring 12 of the bearing 10 rotates counterclockwise therewith, and the fixed ring 11 has a tendency to rotate counterclockwise under the rotation load of the shaft and the moving ring 12, so the first annular side wall 21 of the first installation groove to the third installation groove applies a pushing force to the bearing seat 20 through the first bearing adjustment device 30a, the second bearing adjustment device 30b and the third bearing adjustment device 30c respectively. In addition, when the bearing operating load exceeds the rated operating load of the shaft system and is lower than the stuck limit load of the bearing 10, the fourth bearing adjustment device 30d may not participate in the buffer adjustment, but continuously load a load equal to the rated operating load of the shaft system.
[0059] In addition, the fourth bearing adjustment device 30d can play a role when the bearing 10 (or the fixed ring 11) is removed from the bearing seat 20. When the bearing 10 (or the fixed ring 11) is removed, the power loading assembly 31 of each of the first bearing adjustment device 30a, the second bearing adjustment device 30b and the third bearing adjustment device 30c stops loading, and the fourth bearing adjustment device 30d can be loaded in the circumferential direction, so that the fourth bearing adjustment device 30d pushes the circumferential side wall of the protrusion 16 in the counterclockwise direction. Since the two protrusions 14 located at the upper part have a wedge shape and the first bearing adjustment device 30a, the second bearing adjustment device 30b and the third bearing adjustment device 30c are not loaded, the fixed ring 11 can rotate in the counterclockwise direction so that the wedge-shaped protrusion 14 moves to a position spaced apart from the recess 15 in the radial direction (such as Figure 3 and Figure 6 As shown, a portion of the recess 15 has a shape matching the wedge-shaped protrusion 14, and the other portion has a shape matching the substantially rectangular parallelepiped bearing adjustment device 30. Once the wedge-shaped protrusion 14 moves to the position of the other portion of the recess 15, the surface of the protrusion 14 in the radial direction is spaced apart from the other portion of the recess 15), thereby loosening the fixed ring 11 relative to the bearing seat 20 to facilitate removal of the fixed ring 11 or the bearing 10 from the bearing seat 20.
[0060] In addition, when the shaft rotates clockwise, only the first annular side wall 21 of one of the plurality of mounting grooves faces counterclockwise, while the first annular side walls 21 of the remaining mounting grooves all face clockwise. The above description of the mounting groove and the bearing adjustment device is also applicable to this case, so it will not be repeated here.
[0061] However, the embodiments of the present disclosure are not limited thereto, and more mounting grooves are provided between the bearing seat 20 and the fixed ring 11, and a bearing adjustment device 30 is provided in each mounting groove. In addition, the number of bearing adjustment devices 30 for disassembling the fixed ring 11 may be two or more, but less than the number of bearing adjustment devices 30 for tightening the fixed ring 11 and the bearing seat 20. In addition, the third mounting groove and the fourth mounting groove may also be formed by a wedge-shaped protrusion and a recess, and the wedge-shaped protrusion used to form the third mounting groove and the fourth mounting groove may be integrally formed with the local rear portion or spaced apart from each other. In addition, the mounting grooves may be unevenly distributed in the circumferential direction. For example, in the case where foreign matter enters the interior of the bearing and affects the operation of the bearing, the foreign matter may move downward due to gravity, and therefore, the lower part of the bearing is more likely to get stuck, and thus dense bearing adjustment devices may be provided at the lower part of the fixed ring 11.
[0062] Wind turbines
[0063] According to yet another aspect of the present disclosure, a wind turbine generator set is provided. The wind turbine generator set includes a generator and the shaft system as described above, wherein the rotating shaft is a main shaft of the generator.
[0064] The bearing adjustment device can prevent the fixed ring from creeping relative to the bearing seat in the circumferential direction, thereby avoiding bearing damage. In addition, when the bearing is in an abnormal state and the shaft system operating load increases, the bearing adjustment device can also perform buffering adjustment in the circumferential direction to prevent bearing damage and even affect operation. By recording the detection values of the pressure detection device and the displacement detection device in real time, more accurate shaft system operating condition data can be obtained, and these data can be used for subsequent shaft system development and design, shaft system experiments and shaft system optimization, so as to obtain a shaft system that better meets performance requirements. These data can also be used for shaft system control, early warning, avoidance of problems, and reduction of loss risks.
[0065] The specific implementation methods of the present disclosure are described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that these embodiments can be combined, modified and improved without departing from the principles and spirit of the present disclosure whose scope is defined by the claims (for example, different technical features of the present disclosure can be combined to obtain new technical solutions). These combinations, modifications and improvements should also be within the scope of protection of the present disclosure.
Claims
1. A bearing adjustment device (30) for installation in a shaft system, wherein the shaft system comprises a rotating shaft, a bearing (10) and a bearing seat (20), wherein the rotating shaft is rotatably installed on the bearing seat (20) through the bearing (10), characterized in that: The bearing adjustment device (30) is used to be arranged between the bearing seat (20) and the fixed ring (11) of the bearing (10) and includes a power loading component (31), wherein the power loading component (31) includes a fixed end and a loading end that can move relative to the fixed end, wherein the fixed end and the loading end are used to be arranged between the bearing seat (20) and the fixed ring (11) of the bearing (10) along the circumferential direction of the bearing (10), and are used to apply a load to the bearing seat (20) and the fixed ring (11) along the circumferential direction, so that the two ends of the bearing adjustment device (30) in the circumferential direction are pressed against the fixed ring (11) and the bearing seat (20) respectively.
2. The bearing adjustment device (30) according to claim 1, characterized in that: The bearing adjustment device (30) further comprises: a first push block (35) and a second push block (36), which are respectively arranged on both sides of the power loading assembly (31) in the circumferential direction; the first push block (35) can abut against one of the bearing seat (20) and the fixed ring (11); the second push block (36) can abut against the other of the bearing seat (20) and the fixed ring (11); the first push block (35) and the second push block (36) can move away from each other in the circumferential direction of the bearing (10) under the action of the power loading assembly (31), thereby applying a load to the fixed ring (11) and the bearing seat (20).
3. The bearing adjustment device (30) according to claim 2, characterized in that: The bearing adjustment device (30) further comprises: a pressure detection device (32), arranged between the bearing seat (20) and the fixed ring (11) or between the first push block (35) and the power loading assembly (31), and used for detecting the load of the shaft system in the circumferential direction during the rotation of the moving ring (12) of the bearing (10); The controller (33) is configured to control the load applied by the power loading assembly (31) until the load detected by the pressure detection device (32) meets the rated operating load threshold condition of the shaft system.
4. The bearing adjustment device (30) according to claim 3, characterized in that: The controller (33) is also configured to: In response to the load detected by the pressure detection device (32) exceeding the rated operating load threshold and being lower than the jamming limit load of the bearing (10), the power loading assembly (31) is controlled to load until the load detected by the pressure detection device (32) recovers to meet the rated operating load threshold condition.
5. The bearing adjustment device (30) according to claim 3, characterized in that: The controller (33) is also configured to: In response to the load detected by the pressure detection device (32) exceeding the jam limit load, a warning signal is issued.
6. The bearing adjustment device (30) according to claim 4, characterized in that: The controller (33) is also configured to control the power loading component (31) to load a load greater than or equal to the load detected by the pressure detection device (32) before the load detected by the pressure detection device (32) meets the rated operating load threshold condition.
7. The bearing adjustment device (30) according to claim 3, characterized in that: The bearing adjustment device (30) further comprises a displacement detection device (34), wherein the displacement detection device (34) is used to detect the real-time relative displacement between the bearing seat (20) and the fixed ring (11) in the circumferential direction. The controller (33) is further configured to record the detection value of the displacement detection device (34) as an initial displacement value when the load detected by the pressure detection device (32) satisfies the rated operating load threshold condition, and to adjust the load loaded by the power loading component (31) based on the deviation between the real-time relative displacement detected by the displacement detection device (34) and the initial displacement value before the load detected by the pressure detection device (32) recovers to satisfy the rated operating load threshold condition.
8. The bearing adjustment device (30) according to claim 2, characterized in that: The first push block (35) has an insert block (352) at one end facing the second push block (36), and the second push block (36) has a concave cavity and a plug hole that connects the concave cavity with the outside, wherein the power loading component (31) is arranged in the concave cavity, and the insert block (352) is inserted into the plug hole and abuts against the power loading component (31).
9. The bearing adjustment device (30) according to claim 2, characterized in that: The first push block (35) and the second push block (36) respectively have a first lug (351) and a second lug (361), and the first lug (351) is used to be inserted into a first socket (151) formed in the bearing seat (20), and the second lug (361) is used to be inserted into a second socket (141) formed in the fixed ring (11).
10. A shaft system, comprising a rotating shaft, a bearing (10) and a bearing seat (20), wherein the rotating shaft is rotatably mounted to the bearing seat (20) via the bearing (10), characterized in that: The shaft system further comprises a bearing adjustment device (30) according to any one of claims 1 to 9, wherein the bearing adjustment device (30) is installed between the fixed ring (11) of the bearing (10) and the bearing seat (20).
11. The shaft system according to claim 10, characterized in that: One of the two surfaces of the bearing seat (20) and the fixed ring (11) facing each other in the radial direction has a protrusion (14) protruding along the radial direction, and the other has a recess (15) corresponding to the protrusion (14), wherein a mounting groove is formed between the protrusion (14) and the recess (15) in the circumferential direction, and the bearing adjustment device (30) is installed in the mounting groove.
12. The shaft system according to claim 11, characterized in that: The mounting groove has a first annular side wall (21) and a second annular side wall (22) in the annular direction, one of the first annular side wall (21) and the second annular side wall (22) being formed on the fixed ring (11) and the other being formed on the bearing seat (20), The bearing adjustment device (30) is arranged between the first annular side wall (21) and the second annular side wall (22) along the annular direction, and is loaded with a thrust force along the annular direction to move the fixed ring (11) and the bearing seat (20) away from each other.
13. The shaft system according to claim 11, characterized in that: One of the two surfaces of the bearing seat (20) and the fixed ring (11) facing each other in the radial direction has a plurality of protrusions (14) protruding along the radial direction, and the other has a plurality of recesses (15) corresponding to the plurality of protrusions (14), and each of the plurality of mounting grooves is formed between the corresponding protrusions (14) and the recesses (15), and the plurality of bearing adjustment devices (30) are respectively installed in the plurality of mounting grooves.
14. The shaft system according to claim 13, characterized in that: In the circumferential direction of the shaft system, the loading end of at least one bearing adjustment device (30) among the plurality of bearing adjustment devices (30) loads in the opposite direction to the loading ends of the other bearing adjustment devices (30).
15. A wind turbine generator set, characterized in that: The wind turbine generator set comprises a generator and a shaft system according to any one of claims 10 to 14, wherein the rotating shaft is a main shaft of the generator.