A wind turbine bearing vibration monitoring and early warning device

Abstract

The application relates to the technical field of wind power generation safety, and discloses a bearing vibration monitoring and early warning device for a wind driven generator, which comprises a cabin and an auxiliary mechanism, the inner wall of the cabin is fixedly connected with a first fixing frame, the inner wall of the side, away from the cabin, of the first fixing frame is fixedly connected with a generator, the output end of the generator is fixedly connected with a main shaft, the end, away from the generator, of the main shaft penetrates through the cabin and is fixedly connected with a fan blade, the outer surface of the side, close to the generator, of the main shaft is fixedly sleeved with a fixing block, and the outer surface of the fixing block is provided with a groove; in an environment with much wind sand, the second fixing frame of the wind driven generator is auxiliary fixed on the outer surface of the generator, the first spring and the connecting rod reduce the influence of cabin vibration on the detector, guarantee the normal operation of the detector and the accuracy of the main shaft vibration monitoring result, and provide support for maintenance and fault diagnosis.

Description

Technical Field

[0001] This invention relates to the field of wind power generation safety technology, specifically to a wind turbine bearing vibration monitoring and early warning device. Background Technology

[0002] During the long-term operation of wind turbines, the various components of the bearings are constantly subjected to friction, stress, and other effects, gradually leading to wear and fatigue. Repeated contact between the rolling elements and the raceway causes the surface material to wear down gradually, resulting in an increase in the bearing clearance. When the wear reaches a certain level, the vibration characteristics of the bearing will change significantly. Vibration monitoring can detect these abnormalities in time, providing early warnings before the fault becomes serious, so that maintenance and replacement can be arranged, avoiding downtime and equipment damage caused by sudden failures.

[0003] Patent application CN202320773408.7 discloses a vibration monitoring device for rolling bearings of wind turbine generator sets, including a generator, a gearbox, and a hub. The generator is connected to the gearbox via a coupling, and the gearbox is connected to the hub via a main bearing. A vibration measuring probe is installed near the main bearing, and the vibration measuring probe is connected to a signal acquisition instrument via a signal transmission line.

[0004] In summary, when wind turbines are in environments with strong winds and sandstorms, the turbines may sway and vibrate under the influence of strong winds, which in turn increases the swaying amplitude of the wind turbine tower. This situation will subject the device to a large physical impact, and the swaying will be directly transmitted to the bearings and the vibration monitoring and early warning devices installed on the bearings, affecting the stability of their internal structure, interfering with the normal operation of sensors, and ultimately affecting the accuracy of the bearing vibration detection instruments.

[0005] To address this, we propose a vibration monitoring and early warning device for wind turbine bearings. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a wind turbine bearing vibration monitoring and early warning device to solve the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine bearing vibration monitoring and early warning device, comprising a nacelle and an auxiliary mechanism. A first fixing frame is fixedly connected to the inner wall of the nacelle. A generator is fixedly connected to the inner wall of the first fixing frame on the side away from the nacelle. A main shaft is fixedly connected to the output end of the generator. The end of the main shaft away from the generator passes through the nacelle and is fixedly connected to a wind blade. A fixing block is fixedly sleeved on the outer surface of the main shaft near the generator. A groove is formed on the outer surface of the fixing block. The wind blade converts wind energy into electrical energy through the generator via the main shaft. The first fixing frame serves to fix the generator. The auxiliary mechanism includes:

[0008] A second mounting bracket is fixedly fitted onto the outer surface of the generator. A connecting rod is fixedly connected to the bottom outer wall of the second mounting bracket. A first spring is fixedly connected to the inner wall of the connecting rod on the side away from the second mounting bracket. The end of the first spring away from the connecting rod is fixedly connected to the second mounting bracket. The end of the connecting rod away from the second mounting bracket is fixedly connected to the nacelle. A detection component is installed inside the second mounting bracket. A first fixing shaft is fixedly connected to the outer wall of the connecting rod on the side away from the second mounting bracket. A first support rod is fixedly connected to the end of the first fixing shaft away from the connecting rod. The bottom of the first support rod is fixedly connected to the nacelle.

[0009] According to the above technical solution, a second support rod is fixedly connected to the inner wall of the top of the cabin, and a drive motor is fixedly connected to the outer surface of the second support rod. The output end of the drive motor passes through the second support rod and is fixedly connected to a rotating shaft. The end of the rotating shaft away from the drive motor is rotatably connected to a second fixed frame. A sliding frame is provided at the output end of the drive motor. The inner wall of the sliding frame is slidably connected to the rotating shaft and the first fixed shaft. The second support rod has a certain buffering effect, reducing the impact of cabin vibration on the drive motor. The drive motor causes the sliding frame to slide to one side through the rotating shaft. The first fixed shaft makes the sliding frame more stable during the sliding process. The drive motor causes the sliding frame to slide through the rotating shaft, and the first fixed shaft provides auxiliary support for the sliding frame.

[0010] According to the above technical solution, the detection component includes a first rotating frame rotatably connected to a second fixed frame. A hydraulic rod is fixedly connected to the inner wall of the first rotating frame. A rotating rod is rotatably connected to the top inner wall of the first rotating frame via a rotating shaft. The end of the rotating rod away from the first rotating frame is rotatably connected to the inner wall of a sliding frame. A third fixed frame is fixedly sleeved on the outer surface of the first rotating frame away from the rotating rod. The inner wall of the third fixed frame is fixedly connected to the hydraulic rod. The third fixed frame provides auxiliary support for the hydraulic rod. When the drive motor moves the sliding frame toward the second support rod via the rotating shaft, the sliding frame rotates the first rotating frame toward the fixed block via the rotating rod. When the rotating rod and the first rotating frame are perpendicular to each other, the first rotating frame reaches its maximum rotation value. The hydraulic rod is used to control the distance between the contact point and the fixed block.

[0011] According to the above technical solution, the output end of the hydraulic rod passes through the first rotating frame and is fixedly connected to a force-bearing block. A connecting frame is fixedly connected to the inner wall of the force-bearing block. A second fixed shaft is fixedly connected to the outer wall of the connecting frame away from the force-bearing block. The end of the second fixed shaft away from the connecting frame passes through a third fixed frame and is fixedly connected to a second spring. The end of the second spring near the connecting frame is fixedly connected to the third fixed frame. The hydraulic rod pushes the connecting frame to slide through the force-bearing block. The sliding between the second fixed shaft and the third fixed frame improves the stability of the connecting frame during movement. The second spring is used to absorb the vibration generated by the connecting frame during movement. There are two second fixed shafts, which are symmetrically arranged with the central axis of the force-bearing block as the center.

[0012] According to the above technical solution, an auxiliary motor is fixedly connected to the inner wall of the connecting frame on the side away from the force-bearing block. The output end of the auxiliary motor passes through the connecting frame and is fixedly connected to a second rotating frame. A contact is fixedly connected to the inner wall of the second rotating frame on the side away from the auxiliary motor. The auxiliary motor rotates the contact towards the groove side of the fixed block through the second rotating frame. The contact does not contact the groove on the outer surface of the fixed block. The contact and the outer surface of the groove maintain a distance within the required safety range. When the spindle vibrates beyond the safety range, the spindle contacts the contact through the groove on the outer surface of the fixed block. The auxiliary motor adjusts the angle between the contact and the groove through the second rotating frame, thereby ensuring better contact with the contact when the spindle vibrates beyond the safety range.

[0013] According to the above technical solution, a vibration detector is fixedly connected to the inner wall of the connecting frame near the auxiliary motor. The output end of the vibration detector passes through the connecting frame and is fixedly connected to a detection rod. A detection probe is fixedly connected to the outer wall of the detection rod away from the vibration detector. The detection probe is slidably connected to the second rotating frame. The detection probe transmits the vibration generated by the second rotating frame to the inside of the vibration detector through the detection rod. The vibration detector analyzes the vibration generated by the second rotating frame. After the analysis is completed, the vibration detector issues a vibration monitoring early warning signal. There are two detection rods, which are symmetrically arranged with the central axis of the vibration detector as the center.

[0014] According to the above technical solution, the hydraulic rod moves the connecting frame towards the fixed block via the force-bearing block. The auxiliary motor deflects the contact point towards the groove of the fixed block via the second rotating frame. When the main shaft vibrates, the main shaft contacts the contact point via the fixed block, causing the second rotating frame to vibrate. The vibration detector contacts the second rotating frame via a detection probe fixedly connected to the outer surface of the detection rod, and analyzes the vibration. The hydraulic rod is used to push the force-bearing block towards the fixed block. The auxiliary motor is used to adjust the second rotating frame and flip the contact point towards the fixed block. When the main shaft vibrates, the vibration detector detects the vibration of the second rotating frame via the detection probe. The outer wall of the second rotating frame near the vibration detector is set to a semi-circular shape, thereby ensuring that the detection probe can always contact the second rotating frame when it rotates.

[0015] Compared with the prior art, the present invention provides a wind turbine bearing vibration monitoring and early warning device, which has the following beneficial effects:

[0016] 1. This invention provides a wind turbine bearing vibration monitoring and early warning device. In windy and sandy environments, the second fixing frame of the wind turbine is used to assist in fixing it to the outer surface of the generator. The first spring and connecting rod reduce the impact of nacelle vibration on the detector, ensuring the normal operation of the detector and the accuracy of the main shaft vibration monitoring results, and providing support for maintenance and fault diagnosis.

[0017] 2. By setting up an auxiliary mechanism, the drive motor causes the sliding frame to slide through the rotating shaft, and the sliding frame drives the first rotating frame to rotate through the rotating rod. In this way, the distance between the contact point and the fixed block is changed, thereby changing the vibration range that the vibration detector can detect. This can avoid small vibrations from interfering with the vibration detector's monitoring of the spindle vibration.

[0018] 3. By setting up a detection component, the hydraulic rod pushes the connecting frame to move towards the fixed block. At the same time, the auxiliary motor drives the second rotating frame to rotate towards the fixed block. The auxiliary motor controls the contact angle between the contact point and the groove surface of the outer surface of the fixed block, thereby ensuring that the fixed block can better contact the contact point when the spindle vibrates, thus improving the accuracy of the vibration detector's monitoring results of spindle vibration.

[0019] 4. By setting up a contact point and a vibration detector, when the main shaft vibrates under the influence of the fan blade, the main shaft contacts the contact point through a fixed block. This contact causes the second rotating frame to vibrate accordingly. At this time, the vibration detector contacts the second rotating frame through the detection probe fixedly connected to the outer surface of its detection rod, and then analyzes the vibration. In this way, the accuracy of the vibration detector's monitoring results of the main shaft vibration can be effectively improved, and the vibration state of the main shaft can be better grasped. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall front structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0022] Figure 3 This is a schematic cross-sectional view of the cabin structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the auxiliary mechanism structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the auxiliary mechanism structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the detection component structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the hydraulic rod structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the connecting frame structure of the present invention;

[0028] Figure 9 For the present invention Figure 2 A magnified structural diagram of A in the diagram.

[0029] In the diagram: 1. Nacelle; 2. Fan blade; 3. Main shaft; 4. Generator; 5. First fixed frame; 6. Fixed block; 7. Groove; 8. Auxiliary mechanism; 801. Second fixed frame; 802. Connecting rod; 803. First spring; 804. First support rod; 805. First fixed shaft; 806. Second support rod; 807. Drive motor; 808. Rotating shaft; 809. Sliding frame; 810. Detection assembly; 8101. First rotating frame; 8102. Hydraulic rod; 8103. Rotating rod; 8104. Third fixed frame; 8105. Connecting frame; 8106. Force-bearing block; 8107. Auxiliary motor; 8108. Second rotating frame; 8109. Contact point; 81010. Vibration detector; 81011. Detection rod; 81012. Detection probe; 81013. Second fixed shaft; 81014. Second spring. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Example 1: See Figures 1-5The present invention provides a technical solution: a wind turbine bearing vibration monitoring and early warning device, comprising a nacelle 1 and an auxiliary mechanism 8. A first fixing frame 5 is fixedly connected to the inner wall of the nacelle 1. A generator 4 is fixedly connected to the inner wall of the first fixing frame 5 away from the nacelle 1. A buffer pad is provided on the contact surface between the first fixing frame and the generator to reduce the impact of the nacelle on the generator. A main shaft 3 is fixedly connected to the output end of the generator 4. The end of the main shaft 3 away from the generator 4 passes through the nacelle 1 and is fixedly connected to a wind blade 2. The outer surface of the main shaft 3 near the generator 4 is fixedly sleeved with... There is a fixing block 6, and the outer surface of the fixing block 6 has a groove 7. The fan blade 2 converts wind energy into electrical energy through the generator 4 via the main shaft 3. The first fixing frame 5 fixes the generator 4. The auxiliary mechanism 8 allows the fan blade 2 to rotate under the force of the wind and transmit the wind energy to the generator 4 fixed by the first fixing frame 5 in the nacelle 1 through the main shaft 3. The generator 4 then converts the wind energy into electrical energy. The fixing block 6 and its groove 7 are fixedly fitted on the outer surface of the main shaft 3 near the generator 4, providing a basis for the subsequent vibration detector 81010 to detect the main shaft 3, including:

[0034] The second mounting bracket 801 is fixedly sleeved onto the outer surface of the generator 4. A connecting rod 802 is fixedly connected to the bottom outer wall of the second mounting bracket 801. A first spring 803 is fixedly connected to the inner wall of the connecting rod 802 on the side away from the second mounting bracket 801. The end of the first spring 803 away from the connecting rod 802 is fixedly connected to the second mounting bracket 801, and the end of the connecting rod 802 away from the second mounting bracket 801 is fixedly connected to the engine compartment 1. A detection component 810 is installed inside the second mounting bracket 801. A first fixed shaft 805 is fixedly connected to one side of the outer wall of the first fixed shaft 805. A first support rod 804 is fixedly connected to the end of the first fixed shaft 805 away from the connecting rod 802. The bottom of the first support rod 804 is fixedly connected to the cabin 1. When the cabin 1 vibrates, the vibration is transmitted to the first spring 803 through the fixed connection between the connecting rod 802 and the inner wall of the cabin 1. The first spring 803 absorbs the vibration generated between the connecting rod 802 and the cabin 1, thereby improving the stability of the detection component 810 that is rotatably connected to the inner wall of the second fixed frame 801 during operation.

[0035] A second support rod 806 is fixedly connected to the inner wall of the top of the cabin 1. A drive motor 807 is fixedly connected to the outer surface of the second support rod 806. The output end of the drive motor 807 passes through the second support rod 806 and is fixedly connected to a rotating shaft 808. The end of the rotating shaft 808 away from the drive motor 807 is rotatably connected to a second fixed frame 801. A sliding frame 809 is provided at the output end of the drive motor 807. The inner wall of the sliding frame 809 is slidably connected to the rotating shaft 808 and the first fixed shaft 805. The second support rod 806 has a certain buffering effect to reduce the impact of cabin 1 vibration on the drive motor 807. The drive motor 807 drives the sliding frame 809 to slide to one side through the fixed connection of its output end to the rotating shaft 808. The bottom of the sliding frame 809 is slidably connected to the first fixed shaft 805, and the first fixed shaft 805 ensures the smoothness of the sliding frame 809.

[0036] Example 2: Please refer to Figures 6-9 Based on Embodiment 1, the present invention provides a technical solution: the detection component 810 includes a first rotating frame 8101 rotatably connected to the second fixed frame 801, a hydraulic rod 8102 fixedly connected to the inner wall of the first rotating frame 8101, a rotating rod 8103 rotatably connected to the top inner wall of the first rotating frame 8101 via a rotating shaft, one end of the rotating rod 8103 away from the first rotating frame 8101 being rotatably connected to the inner wall of the sliding frame 809, and a third fixed frame 8104 fixedly sleeved on the outer surface of the side of the first rotating frame 8101 away from the rotating rod 8103, the inner wall of the third fixed frame 8104 being... The third fixed frame 8104 is fixedly connected to the hydraulic rod 8102 and provides auxiliary support for the hydraulic rod 8102. When the drive motor 807 is working, the output end of the drive motor 807 moves the sliding frame 809 toward the second support rod 806 via the rotating shaft 808. The sliding frame 809 drives the first rotating frame 8101 to flip toward the fixed block 6 via the rotating rod 8103. When the rotating rod 8103 and the first rotating frame 8101 are perpendicular to each other, the first rotating frame 8101 reaches the maximum value of flipping. The flipping angle of the first rotating frame 8101 can be adjusted by the rotating rod 8103.

[0037] The output end of the hydraulic rod 8102 passes through the first rotating frame 8101 and is fixedly connected to a force-bearing block 8106. A connecting frame 8105 is fixedly connected to the inner wall of the force-bearing block 8106. A second fixed shaft 81013 is fixedly connected to the outer wall of the connecting frame 8105 away from the force-bearing block 8106. The end of the second fixed shaft 81013 away from the connecting frame 8105 passes through a third fixed frame 8104 and is fixedly connected to a second spring 81014. The end of the second spring 81014 near the connecting frame 8105 is fixedly connected to the third fixed frame 8104. The hydraulic rod 8102 pushes the connecting frame 8105 through the force-bearing block 8106. The connecting frame 8105 slides between the second fixed shaft 81013 and the third fixed frame 8104, improving the stability of the connecting frame 8105 during movement. The second spring 81014 is used to absorb the vibration generated by the connecting frame 8105 during movement. When the hydraulic rod 8102 works, it pushes the force block 8106 to make the connecting frame 8105 slide. The connecting frame 8105, with the help of the sliding cooperation between the second fixed shaft 81013 and the third fixed frame 8104, compresses the second spring 81014 during the sliding process, improving the stability of the connecting frame 8105 during movement.

[0038] An auxiliary motor 8107 is fixedly connected to the inner wall of the connecting frame 8105 on the side away from the force block 8106. The output end of the auxiliary motor 8107 passes through the connecting frame 8105 and is fixedly connected to a second rotating frame 8108. A contact 8109 is fixedly connected to the inner wall of the second rotating frame 8108 on the side away from the auxiliary motor 8107. The auxiliary motor 8107 causes the contact 8109 to rotate toward the groove 7 of the fixed block 6 through the second rotating frame 8108. When the main shaft 3 vibrates beyond the safe range, the main shaft 3 will contact the contact 8109 through the groove 7 on the outer surface of the fixed block 6. The contact 8109 transmits the vibration to the vibration detector 81010 through the second rotating frame 8108. The vibration detector 81010 monitors the vibration of the wind turbine bearing and responds to abnormal situations.

[0039] A vibration detector 81010 is fixedly connected to the inner wall of the connecting frame 8105 near the auxiliary motor 8107. The output end of the vibration detector 81010 passes through the connecting frame 8105 and is fixedly connected to a detection rod 81011. A detection probe 81012 is fixedly connected to the outer wall of the end of the detection rod 81011 away from the vibration detector 81010. The detection probe 81012 is slidably connected to the second rotating frame 8108. The vibration generated by the second rotating frame 8108 is received by the detection probe 81012 and then transmitted to the inside of the vibration detector 81010 through the detection rod 81011. The vibration detector 81010 analyzes these vibration data and issues a vibration monitoring early warning signal after the analysis is completed, thereby realizing the monitoring and early warning function of the vibration of the second rotating frame 8108.

[0040] The hydraulic rod 8102 moves the connecting frame 8105 towards the fixed block 6 via the force-bearing block 8106. The auxiliary motor 8107 deflects the contact point 8109 towards the groove 7 of the fixed block 6 via the second rotating frame 8108. When the main shaft 3 vibrates, it contacts the contact point 8109 via the fixed block 6, causing the second rotating frame 8108 to vibrate. The vibration detector 81010 contacts the second rotating frame 8108 via the detection probe 81012 fixedly connected to the outer surface of the detection rod 81011, and analyzes the vibration. The hydraulic rod 8102 is used to move the force-bearing block 8106 towards the groove 7 of the fixed block 6. Pushed by the fixed block 6, the auxiliary motor 8107 is used to adjust the second rotating frame 8108 and cause the contact 8109 to flip toward the fixed block 6. When the main shaft 3 vibrates, the vibration detector 81010 detects the vibration of the second rotating frame 8108 through the detection probe 81012. When the main shaft 3 vibrates due to the influence of the fan blade 2, the main shaft 3 contacts the contact 8109 with the fixed block 6, causing the second rotating frame 8108 to vibrate. The detection probe 81012 on the detection rod 81011, which is fixedly connected to the outer wall of the vibration detector 81010, contacts the second rotating frame 8108 to analyze the vibration of the main shaft 3.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind turbine bearing vibration monitoring and early warning device, comprising a nacelle (1) and an auxiliary mechanism (8), wherein a first fixing frame (5) is fixedly connected to the inner wall of the nacelle (1), a generator (4) is fixedly connected to the inner wall of the first fixing frame (5) away from the nacelle (1), a main shaft (3) is fixedly connected to the output end of the generator (4), the end of the main shaft (3) away from the generator (4) passes through the nacelle (1) and is fixedly connected to a wind blade (2), a fixing block (6) is fixedly sleeved on the outer surface of the main shaft (3) near the generator (4), and a groove (7) is provided on the outer surface of the fixing block (6), wherein the first fixing frame (5) plays a fixing role for the generator (4), characterized in that: The auxiliary mechanism (8) includes: The second mounting bracket (801) is fixedly sleeved on the outer surface of the generator (4). A connecting rod (802) is fixedly connected to the bottom outer wall of the second mounting bracket (801). A first spring (803) is fixedly connected to the inner wall of the connecting rod (802) on the side away from the second mounting bracket (801). The end of the first spring (803) away from the connecting rod (802) is fixedly connected to the second mounting bracket (801), and the end of the connecting rod (802) away from the second mounting bracket (801) is connected to the engine compartment. (1) Fixed connection, the second fixed frame (801) is provided with a detection component (810), the outer wall of the connecting rod (802) away from the second fixed frame (801) is fixedly connected with a first fixed shaft (805), the end of the first fixed shaft (805) away from the connecting rod (802) is fixedly connected with a first support rod (804), the bottom of the first support rod (804) is fixedly connected with the cabin (1), and the first spring (803) is used to absorb the vibration generated between the connecting rod (802) and the cabin (1); A second support rod (806) is fixedly connected to the top inner wall of the cabin (1). A drive motor (807) is fixedly connected to the outer surface of the second support rod (806). The output end of the drive motor (807) passes through the second support rod (806) and is fixedly connected to a rotating shaft (808). The end of the rotating shaft (808) away from the drive motor (807) is rotatably connected to a second fixed frame (801). A sliding frame (809) is provided at the output end of the drive motor (807). The inner wall of the sliding frame (809) is slidably connected to the rotating shaft (808) and the first fixed shaft (805). The first fixed shaft (805) provides bottom support for the sliding frame (809). The detection assembly (810) includes a first rotating frame (8101) rotatably connected to a second fixed frame (801). A hydraulic rod (8102) is fixedly connected to the inner wall of the first rotating frame (8101). A rotating rod (8103) is rotatably connected to the top inner wall of the first rotating frame (8101) via a rotating shaft. The end of the rotating rod (8103) away from the first rotating frame (8101) is rotatably connected to the inner wall of a sliding frame (809). A third fixed frame (8104) is fixedly sleeved on the outer surface of the first rotating frame (8101) away from the rotating rod (8103). The rotating rod (8103) presses the first rotating frame (8101) under the sliding of the sliding frame (809), causing the first rotating frame (8101) to flip towards the main shaft (3).

2. The wind turbine bearing vibration monitoring and early warning device according to claim 1, characterized in that: The output end of the hydraulic rod (8102) passes through the first rotating frame (8101) and is fixedly connected to a force-bearing block (8106). A connecting frame (8105) is fixedly connected to the inner wall of the force-bearing block (8106). A second fixed shaft (81013) is fixedly connected to the outer wall of the connecting frame (8105) away from the force-bearing block (8106). A second spring (81014) is fixedly connected to the end of the second fixed shaft (81013) away from the connecting frame (8105). The second spring (81014) is close to the connecting frame (8106). One end of the connecting frame (8105) is fixedly connected to the third fixed frame (8104). The second fixed shaft (81013) passes through the third fixed frame (8104) and is fixedly connected to the second spring (81014). The connecting frame (8105) moves toward the first rotating frame (8101) under the contraction of the hydraulic rod (8102). The connecting frame (8105) stretches the second spring (81014) through the second fixed shaft (81013). The second spring (81014) absorbs the vibration during the movement of the connecting frame (8105).

3. The wind turbine bearing vibration monitoring and early warning device according to claim 2, characterized in that: An auxiliary motor (8107) is fixedly connected to the inner wall of the connecting frame (8105) away from the force block (8106). The output end of the auxiliary motor (8107) passes through the connecting frame (8105) and is fixedly connected to a second rotating frame (8108). A contact (8109) is fixedly connected to the inner wall of the second rotating frame (8108) away from the auxiliary motor (8107). The contact (8109) does not contact the groove (7) opened on the outer surface of the fixed block (6), and the contact (8109) maintains a safe distance from the outer surface of the groove (7).

4. The wind turbine bearing vibration monitoring and early warning device according to claim 3, characterized in that: A vibration detector (81010) is fixedly connected to the inner wall of the connecting frame (8105) near the auxiliary motor (8107). The output end of the vibration detector (81010) passes through the connecting frame (8105) and is fixedly connected to a detection rod (81011). A detection probe (81012) is fixedly connected to the outer wall of the end of the detection rod (81011) away from the vibration detector (81010). The detection probe (81012) is slidably connected to the second rotating frame (8108). The vibration generated by the second rotating frame (8108) is analyzed by the vibration detector (81010). After the analysis is completed, a vibration monitoring early warning signal is issued by the vibration detector (81010).

5. The wind turbine bearing vibration monitoring and early warning device according to claim 4, characterized in that: The hydraulic rod (8102) moves the connecting frame (8105) toward the fixed block (6) via the force block (8106). The auxiliary motor (8107) causes the contact point (8109) to deflect toward the groove (7) of the fixed block (6) via the second rotating frame (8108). When the main shaft (3) vibrates, the main shaft (3) contacts the contact point (8109) via the fixed block (6) and causes the second rotating frame (8108) to vibrate. The vibration detector (81010) contacts the second rotating frame (8108) via the detection probe (81012) fixedly connected to the outer surface of the detection rod (81011). When the main shaft (3) vibrates, it contacts the contact point (8109) via the fixed block (6). The vibration detector (81010) performs vibration detection on the second rotating frame (8108) fixedly connected to the contact point (8109) via the detection probe (81012).

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