Variable pitch bearing state monitoring device of wind generating set and variable pitch bearing assembly
By using a combination of connecting structure and tension sensors in a wind turbine set, the real-time monitoring of the status of the pitch bearing bolts is solved, and the problem of regular climbing and shutdown inspections in the prior art is solved, which improves inspection efficiency and convenience.
Patent Information
- Application Number
- CN202422303278.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, bolt inspection on pitch bearings requires regular climbing of wind turbines and shutting down, resulting in inefficient inspections.
A pitch bearing state monitoring device for wind turbines is designed. Through the combination of the connecting structure, the cable and tension sensor, the bolt status on the outer ring of the pitch bearing is monitored in real time, and the tension change between the cable and tension sensor is used to detect the bolt loosening, cracking or falling off.
It realizes real-time monitoring of the pitch bearing bolt status without stopping the wind turbine, improves inspection efficiency, simplifies the operation process, and reduces labor costs.
Smart Images
Figure CN223120089U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of pitch bearing monitoring, and in particular, to a pitch bearing condition monitoring device and a pitch bearing assembly for a wind turbine generator set. Background Art
[0002] The pitch bearing is an important component in a wind turbine generator. Its main function is to change the windward angle of the blade by rotation, thereby controlling the rotational speed and output power of the wind turbine generator, etc.
[0003] In order to ensure the normal operation of the wind turbine generator, in the related art, the operator needs to climb the wind turbine generator regularly to check the bolts provided on the pitch bearing, so as to avoid the situation that the bolts on the pitch bearing become loose, cracked or even fall off, resulting in the loosening or even falling off of the blades of the wind turbine generator. The inspection of the bolts on the pitch bearing is relatively complex and has low efficiency. Summary of the Utility Model
[0004] The purpose of the present disclosure is to provide a pitch bearing condition monitoring device and a pitch bearing assembly for a wind turbine generator set to solve the problems existing in the related art.
[0005] According to a first aspect of the present disclosure, there is provided a pitch bearing condition monitoring device for a wind turbine generator set, including a connection structure, a cable, and a tension sensor;
[0006] The connection structure is used to connect to the bolts on the outer ring of the pitch bearing. One end of the cable is connected to the tension sensor, and the other end of the cable is connected to the connection structure. The cable is tensioned between the connection structure and the tension sensor, and the tension sensor is used to monitor the tension of the cable.
[0007] Optionally, there are multiple connection structures, and the multiple connection structures are arranged in one-to-one correspondence with the multiple bolts on the outer ring of the pitch bearing, and the multiple connection structures are all connected to the cable.
[0008] Optionally, one end of the cable is connected to the tension sensor, and the other end of the cable extends along the circumferential direction of the pitch bearing and is sequentially connected to the multiple connection structures spaced along the circumferential direction of the pitch bearing; or,
[0009] The cable includes a main cable and multiple sub-cables connected to the main cable. The multiple sub-cables are arranged in one-to-one correspondence with the multiple connection structures. One end of the main cable is connected to the tension sensor, and the other end of the main cable is connected to one ends of the multiple sub-cables. The other end of each sub-cable is connected to the corresponding connection structure.
[0010] Optionally, the connection structure includes a mounting member and a pull ring. The mounting member is used to be mounted on the head of the bolt. The pull ring is connected to the mounting member, and the cable is threaded through the pull ring.
[0011] Optionally, the pull ring is detachably connected to the mounting member.
[0012] Optionally, the mounting member includes a main body and a fixing ring provided on a side of the main body close to the connection structure. The pull ring is detachably connected to the fixing ring, and the main body is detachably connected to the fixing ring.
[0013] Optionally, the connection structure further includes a snap hook. The snap hook is threaded through the pull ring and hooked on the fixing ring.
[0014] Optionally, the main body is formed as a connecting plate. The connecting plate is bonded to the head of the bolt. The fixing ring includes a plate body and a ring body provided on the plate body;
[0015] At least one blind threaded hole is formed in the connecting plate, and at least one through hole is formed in the plate body. A fastener passes through the through hole and is threadedly connected to the blind threaded hole so that the mounting member is connected to the connecting plate.
[0016] Optionally, the pitch bearing condition monitoring device further includes a bracket. The bracket is used to be mounted on the tower of the wind turbine, and the tension sensor is mounted on the bracket.
[0017] According to a second aspect of the present disclosure, there is provided a pitch bearing assembly, including a pitch bearing and the pitch bearing condition monitoring device as described above.
[0018] Through the above technical solution, since the connection structure is connected to the bolt on the outer ring of the pitch bearing, and the cable is tensioned between the connection structure and the tension sensor. Thus, during the normal operation of the pitch bearing, since the positions between the connection structure and the tension sensor are relatively fixed, the tensions on the cable from the connection structure and the tension sensor are the same, and the tensions measured by the tension sensor are also the same. If during the operation of the pitch bearing, the bolts on the outer ring of the pitch bearing become loose, or the end face of the pitch bearing cracks or is misaligned, resulting in the bolts on the outer ring of the pitch bearing cracking or even falling off, the position of the connection structure connected to the bolts will also change with the position of the bolts, resulting in a change in the tension on the cable and different tensions measured by the tension sensor (for example, when the bolt on the pitch bearing falls off the pitch bearing, the bolt will hang on the cable, and at this time, the cable is subjected to the gravity of the bolt, and the tension on the cable increases). Thus, by monitoring the tension measured by the tension sensor, it is possible to monitor the bolts provided on the outer ring of the pitch bearing, and thereby monitor the operating state of the pitch bearing.
[0019] Compared with the technical solution in the related art where an operator needs to climb the wind turbine regularly, and needs to stop the wind turbine first and then check the bolts on the pitch bearing, the pitch bearing condition monitoring device of the present application allows the operator to monitor the bolts arranged on the outer ring of the pitch bearing in real time without climbing the wind turbine and without stopping the wind turbine. The inspection of the bolts on the pitch bearing of the wind turbine is more convenient and has higher efficiency.
[0020] Other features and advantages of the present disclosure will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:
[0022] Figure 1 is a three-dimensional structural schematic diagram of the pitch bearing condition monitoring device of a wind turbine provided by an exemplary embodiment of the present disclosure installed on the pitch bearing.
[0023] Figure 2 is Figure 1 an enlarged view of A in
[0024] Figure 3 is Figure 2 an enlarged view of B in
[0025] Figure 4 is a three-dimensional structural schematic diagram of the main body of the mounting member of the pitch bearing condition monitoring device of a wind turbine provided by an exemplary embodiment of the present disclosure.
[0026] Figure 5 is a three-dimensional structural schematic diagram of the fixing ring of the mounting member of the pitch bearing condition monitoring device of a wind turbine provided by an exemplary embodiment of the present disclosure.
[0027] Figure 6 is a three-dimensional structural schematic diagram of the spring buckle of the connection structure of the pitch bearing condition monitoring device of a wind turbine provided by an exemplary embodiment of the present disclosure.
[0028] DESCRIPTION OF THE REFERENCE NUMERALS
[0029] 100 - Pitch bearing condition monitoring device; 10 - Connection structure; 1 - Mounting part; 11 - Main body; 12 - Connection plate; 121 - Threaded blind hole; 13 - Fixed ring; 14 - Plate body; 141 - Through hole; 15 - Ring body; 2 - Pulling ring; 3 - Spring buckle; 20 - Cable; 30 - Tension sensor; 40 - Bracket; 200 - Pitch bearing; 201 - Inner ring; 202 - Outer ring; 203 - Bolt. Detailed implementation mode
[0030] The following will describe in detail the specific implementation modes of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation modes described herein are only for the purpose of illustrating and explaining the present disclosure, and are not used to limit the present disclosure.
[0031] In the present disclosure, it should be understood that the orientation words such as "upper, lower" are defined according to the drawing direction of the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present disclosure. The terms "inner, outer" refer to the inside and outside of the corresponding structural contour. In addition, it should be noted that the terms such as "first, second" are used to distinguish one element from another, and do not have sequentiality and importance. In addition, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements.
[0032] In the description of the present disclosure, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connect", "be connected", "mount" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.
[0033] As Figures 1 to 6 shown, according to the first aspect of the present disclosure, a pitch bearing condition monitoring device 100 for a wind turbine generator is provided, including a connection structure 10, a cable 20, and a tension sensor 30. The connection structure 10 is used to connect to a bolt 203 on the outer ring 202 of the pitch bearing 200. One end of the cable 20 is connected to the tension sensor 30, and the other end of the cable 20 is connected to the connection structure 10. The cable 20 is tensioned between the connection structure 10 and the tension sensor 30, and the tension sensor 30 is used to monitor the tension of the cable 20.
[0034] Through the above technical solution, since the connecting structure 10 is connected to the bolt 203 on the outer ring 202 of the pitch bearing 200, and the cable 20 is tensioned between the connecting structure 10 and the tension sensor 30. In this way, during the normal operation of the pitch bearing 200, since the positions between the connecting structure 10 and the tension sensor 30 are relatively fixed, the cable 20 is subjected to the same tension from the connecting structure 10 and the tension sensor 30, and the tension measured by the tension sensor 30 is also the same. If, during the operation of the pitch bearing 200, the bolt 203 on the outer ring 202 of the pitch bearing 200 becomes loose, or the end face of the pitch bearing 200 cracks or is misaligned, resulting in the bolt 203 on the outer ring 202 of the pitch bearing 200 cracking or even falling off, the position of the connecting structure 10 connected to the bolt 203 will also change with the position of the bolt 203, causing the tension of the cable 20 to change, and the tensions measured by the tension sensor 30 to be different (for example, when the bolt 203 on the pitch bearing 200 falls off from the pitch bearing 200, the bolt 203 will hang on the cable 20, and at this time, the cable 20 is subjected to the gravity from the bolt 203, and the tension of the cable 20 increases). In this way, by monitoring the tension measured by the tension sensor 30, the bolt 203 provided on the outer ring 202 of the pitch bearing 200 can be monitored, thereby monitoring the operating state of the pitch bearing 200.
[0035] Compared with the technical solution in the related art where the operator needs to regularly climb the wind turbine, and needs to first stop the wind turbine and then check the bolts 203 on the pitch bearing 200, the pitch bearing state monitoring device 100 of the present application allows the operator to monitor the bolts 203 provided on the outer ring 202 of the pitch bearing 200 in real time without climbing the wind turbine and without stopping the wind turbine. The inspection of the bolts 203 on the pitch bearing 200 of the wind turbine is relatively convenient and has high efficiency.
[0036] The present disclosure does not limit the connection relationship between the tension sensor 30 and the bolt 203 on the outer ring 202 of the pitch bearing 200. One tension sensor 30 can be connected to one bolt 203, or one tension sensor 30 can also be connected to multiple bolts 203 at the same time. As an implementation manner of the present disclosure, such as Figure 1 and Figure 2As shown, there are multiple connecting structures 10, and the multiple connecting structures 10 are used to be arranged in one-to-one correspondence with multiple bolts 203 on the outer ring 202 of the pitch bearing 200. The multiple connecting structures 10 are all connected to the cable 20. In other words, one tension sensor 30 can be connected to multiple bolts 203 arranged on the outer ring 202 of the pitch bearing 200 through the cable 20 at the same time. In this way, one tension sensor 30 can monitor multiple bolts 203 arranged on the outer ring 202 of the pitch bearing 200 at the same time. On the one hand, the structure of the pitch bearing condition monitoring device 100 can be simplified, and the situation that the pitch bearing condition monitoring device 100 interferes with the pitch bearing 200 or other components in the wind turbine can be effectively avoided. On the other hand, the cost of the pitch bearing condition monitoring device 100 can also be reduced.
[0037] For the implementation manner in which one tension sensor 30 is connected to multiple bolts 203 arranged on the outer ring 202 of the pitch bearing 200, the present disclosure does not limit the connection manner between the cable 20 and the multiple connecting structures 10 either. As an implementation manner of the present disclosure, as Figures 1 to 3 shown, one end of the cable 20 is connected to the tension sensor 30, and the other end of the cable 20 extends along the circumference of the pitch bearing 200 and is sequentially connected to multiple connecting structures 10 spaced along the circumference of the pitch bearing 200. In other words, the cable 20 passes through multiple connecting structures 10 arranged on the bolts 203 in sequence and is fixed on the last connected connecting structure 10, so as to connect the tension sensor 30 to multiple bolts 203 arranged on the outer ring 202 of the pitch bearing 200.
[0038] As another implementation manner of the present disclosure, the above-mentioned cable 20 may further include a main cable and multiple sub-cables connected to the main cable. The multiple sub-cables are arranged in one-to-one correspondence with the multiple connecting structures 10. One end of the main cable is connected to the tension sensor 30, and the other end of the main cable is connected to one ends of the multiple sub-cables. The other end of each sub-cable is connected to the corresponding connecting structure 10. In other words, each connecting structure 10 arranged on the bearing is connected to the main cable through the correspondingly arranged sub-cable, so as to connect the tension sensor 30 to multiple bolts 203 arranged on the outer ring 202 of the pitch bearing 200.
[0039] The present disclosure does not limit the specific structure of the connecting structure 10, as long as the connecting structure 10 can facilitate the connection with the bolts 203 arranged on the outer ring 202 of the pitch bearing 200. As an implementation manner of the present disclosure, as Figure 2 and Figure 3As shown, the connection structure 10 includes a mounting member 1 and a pull ring 2. The mounting member 1 is used to be mounted on the head of the bolt 203. The pull ring 2 is connected to the mounting member 1, and the cable 20 is threaded through the pull ring 2. The mounting member 1 can be reliably connected to the head of the bolt 203 and is not easily detached from the bolt 203. In addition, since the connection structure 10 further includes a pull ring 2, the pull ring 2 can facilitate the threading of the cable 20, so that multiple connection structures 10 are interconnected through the same cable 20.
[0040] Optionally, as Figure 2 and Figure 3 shown, the pull ring 2 is detachably connected to the mounting member 1. Since the pull ring 2 is detachably connected to the mounting member 1, in this way, if the bolt 203 on the pitch bearing 200 cracks or even falls off, when the operator needs to replace the bolt 203, it is not necessary to remove the entire pitch bearing condition monitoring device 100. Just remove the pull ring 2 on the bolt 203 to be replaced, and the bolt 203 to be replaced can be exposed, so as to replace the bolt 203. The replacement of the bolt 203 on the pitch bearing 200 is relatively simple and has high efficiency.
[0041] It should be noted that the present disclosure does not limit the specific structure of the mounting member 1 either. As long as the mounting member 1 can be reliably connected to the bolt 203 provided on the outer circumferential surface of the pitch bearing 200 and can be detachably connected to the pull ring 2. As an embodiment of the present disclosure, as Figure 5 shown, the mounting member 1 includes a main body 11 and a fixing ring 13 provided on one side of the main body 11 close to the connection structure 10. The pull ring 2 is detachably connected to the fixing ring 13, and the main body 11 is detachably connected to the fixing ring 13. Since the main body 11 is detachably connected to the fixing ring 13, if the bolt 203 on the pitch bearing 200 cracks or even falls off, when the operator needs to replace the bolt 203, by removing the fixing ring 13 from the main body 11, the bolt 203 to be replaced can also be exposed, so as to replace the bolt 203. The replacement of the bolt 203 on the pitch bearing 200 is relatively simple and has high efficiency.
[0042] In addition, since the main body 11 itself also has a certain thickness, designed in this way, there can be a certain distance between the fixing ring 13 provided on the side of the main body 11 away from the bolt 203 and the bolt 203 on the outer ring 202 of the pitch bearing 200. In this way, when the cable 20 is connected to the main body 11 through the pull ring 2, there can also be a certain distance between the cable 20 and the bolt 203, so as to avoid the situation that the cable 20 and the bolt 203 rub against each other and damage the cable 20 and / or the bolt 203.
[0043] Here, it should be noted that the present disclosure does not limit the specific manner in which the pull ring 2 is detachably connected to the fixing ring 13. As an embodiment of the present disclosure, asFigure 2 and Figure 6 As shown, the above connection structure 10 may further include a spring buckle 3. The spring buckle 3 is inserted through the pull ring 2 and hung on the fixed ring 13. In this way, when it is necessary to remove the pull ring 2 from the fixed ring 13, the spring buckle 3 can be pressed to open the spring buckle 3, and then the spring buckle 3 can be removed from the fixed ring 13, so as to remove the pull ring 2 from the mounting member 1.
[0044] As other embodiments of the present disclosure, a buckle may be formed on the above mounting member 1, and a locking leg may be formed on one side of the pull ring 2. The locking leg can be inserted into the buckle to detachably connect the pull ring 2 to the mounting member 1.
[0045] For the embodiment in which the mounting member 1 includes the main body 11 and the fixed ring 13, and the main body 11 is detachably connected to the fixed ring 13, the present disclosure does not limit the specific connection relationship between the main body 11 and the bolt 203, nor the specific connection relationship between the main body 11 and the fixed ring 13. As an embodiment of the present disclosure, as Figure 4 shown, the main body 11 is formed as a connecting plate 12. The connecting plate 12 is bonded to the head of the bolt 203. The fixed ring 13 includes a plate body 14 and a ring body 15 provided on the plate body 14. At least one blind threaded hole 121 is formed on the connecting plate 12, and at least one through hole 141 is formed on the plate body 14. The fastener passes through the through hole 141 and is threadedly connected to the blind threaded hole 121 to connect the plate body 14 to the connecting plate 12. Since the main body 11 of the mounting member 1 is formed as the connecting plate 12, and the connecting plate 12 is bonded to the head of the bolt 203 by bonding, the bonding area between the connecting plate 12 and the head of the bolt 203 is large, which is beneficial to improving the connection strength between the mounting member 1 and the bolt 203, and the mounting member 1 is not easily detached from the bolt 203.
[0046] Moreover, since the plate body 14 of the fixed ring 13 and the connecting plate 12 are threadedly connected, the connection between the fixed ring 13 and the connecting plate 12 is reliable, and the fixed ring 13 is not easily detached from the connecting plate 12.
[0047] In addition, since the threaded hole on the connecting plate 12 is formed as a blind threaded hole 121, when the fastener passes through the through hole 141 on the plate body 14 of the fixed ring 13 and is threadedly connected to the threaded hole on the connecting plate 12, the blind threaded hole 121 can play a role in limiting the fastener, and the fastener will not pass through the connecting plate 12, effectively avoiding the situation that the fastener passes through the connecting plate 12 and easily damages the bolt 203.
[0048] Here, it should be noted that the present disclosure does not limit the specific connection position of the connecting plate 12 and the bolt 203. The connecting plate 12 can be connected to the head of the bolt 203 provided on the outer ring 202 of the pitch bearing 200, or the connecting plate 12 can also be connected to the rod portion of the bolt 203 provided on the outer ring 202 of the pitch bearing 200.
[0049] For the convenience of fixing the above-mentioned pitch bearing condition monitoring device 100, optionally, as Figure 1 and Figure 2 shown, the pitch bearing condition monitoring device 100 further includes a bracket 40. The bracket 40 is used to be installed on the tower of the wind turbine, and the tension sensor 30 is installed on the bracket 40. Since the tension sensor 30 is installed on the tower of the wind turbine through the bracket 40, the fixing of the tension sensor 30 is reliable. During use, the tension sensor 30 will not shake due to external forces, thus effectively avoiding the situation where the tension sensor 30 shakes, resulting in a change in the measured tension of the tension sensor 30 and the tension sensor 30 being unable to normally monitor the bolt 203 on the pitch bearing 200.
[0050] In addition, the bracket 40 installed on the tower of the wind turbine will not interfere with the rotation of the pitch bearing 200, effectively avoiding the situation where the pitch bearing 200 cannot rotate normally due to the interference between the bracket 40 and the pitch bearing 200.
[0051] According to the second aspect of the present disclosure, a pitch bearing assembly is provided, including a pitch bearing 200 and the pitch bearing condition monitoring device 100 as described above.
[0052] This pitch bearing assembly has all the beneficial effects of the above-mentioned pitch bearing condition monitoring device 100, which will not be elaborated here.
[0053] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
[0054] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.
[0055] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.
Claims
1. A pitch bearing condition monitoring device for a wind turbine generator, characterized in that, It includes a connection structure, a cable, and a tension sensor; The connection structure is used to connect with the bolts on the outer ring of the pitch bearing. One end of the cable is connected to the tension sensor, and the other end of the cable is connected to the connection structure. The cable is tensioned between the connection structure and the tension sensor, and the tension sensor is used to monitor the tension of the cable.
2. The pitch bearing condition monitoring device according to claim 1, wherein There are multiple connection structures, and the multiple connection structures are arranged in one-to-one correspondence with the multiple bolts on the outer ring of the pitch bearing, and the multiple connection structures are all connected to the cable.
3. The pitch bearing condition monitoring device according to claim 2, characterized in that, One end of the cable is connected to the tension sensor, and the other end of the cable extends along the circumference of the pitch bearing and is sequentially connected to multiple connection structures spaced along the circumference of the pitch bearing; or, The cable includes a main cable and multiple sub-cables connected to the main cable. The multiple sub-cables are arranged in one-to-one correspondence with the multiple connection structures. One end of the main cable is connected to the tension sensor, and the other end of the main cable is connected to one ends of the multiple sub-cables. The other end of each sub-cable is connected to the corresponding connection structure.
4. The pitch bearing condition monitoring device according to claim 1, characterized in that, The connection structure includes a mounting member and a pull ring. The mounting member is used to be mounted on the head of the bolt, the pull ring is connected to the mounting member, and the cable passes through the pull ring.
5. The pitch bearing condition monitoring device according to claim 4, wherein The pull ring is detachably connected to the mounting member.
6. The pitch bearing condition monitoring device according to claim 5, characterized in that, The mounting member includes a main body and a fixing ring provided on one side of the main body close to the connection structure. The pull ring is detachably connected to the fixing ring, and the main body is detachably connected to the fixing ring.
7. The pitch bearing condition monitoring device according to claim 6, wherein The connection structure further includes a spring buckle, and the spring buckle passes through the pull ring and is hung on the fixing ring.
8. The pitch bearing condition monitoring device according to claim 6, characterized in that, The main body is formed as a connecting plate, and the connecting plate is bonded to the head of the bolt. The fixing ring includes a plate body and a ring body provided on the plate body; At least one threaded blind hole is formed in the connecting plate, and at least one through hole is formed in the plate body. A fastener passes through the through hole and is threadedly connected to the threaded blind hole so that the mounting member is connected to the connecting plate.
9. The pitch bearing condition monitoring device according to any one of claims 1-8, characterized in that The pitch bearing condition monitoring device further includes a bracket, the bracket is used to be mounted on the tower of the wind turbine, and the tension sensor is mounted on the bracket.
10. A pitch bearing assembly, characterized in that, It includes a pitch bearing and the pitch bearing condition monitoring device according to any one of claims 1-9.