Vibration monitoring and early warning device for bearing of wind driven generator

Abstract

The invention relates to the technical field of wind power generation safety, and discloses a wind driven generator bearing vibration monitoring and early warning device which comprises a cabin and an auxiliary mechanism, a first fixing frame is fixedly connected to the inner wall of the cabin, and a generator is fixedly connected to the inner wall of the side, away from the cabin, of the first fixing frame; 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 fan blades, the outer surface of the side, close to the generator, of the main shaft is fixedly sleeved with a fixing block, and a groove is formed in the outer surface of the fixing block. The second fixing frame of the wind driven generator assists in being fixed to the outer surface of the generator, the first spring and the connecting rod reduce the influence of cabin vibration on the detector, normal operation of the detector and the accuracy of a spindle vibration monitoring result are guaranteed, and support is provided for maintenance and fault diagnosis.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation safety, and in particular to a wind generator bearing vibration monitoring and early warning device. Background Art

[0002] During the long-term operation of wind turbines, the various components of the bearings will be constantly subjected to friction, stress, and other effects, and will gradually experience wear and fatigue. Repeated contact between the rolling elements and the raceways will gradually wear out the surface material, causing the bearing clearance to increase. When the wear reaches a certain level, the vibration characteristics of the bearing will change significantly. Vibration monitoring can detect these anomalies in a timely manner and issue an early warning before the fault becomes serious, so that maintenance and replacement can be arranged to avoid downtime and equipment damage caused by sudden failures.

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

[0004] To sum up, when a wind turbine is in an environment with strong winds and sand, it may shake and vibrate under the action of strong winds, which will cause the shaking amplitude of the wind turbine tower to increase. This situation will cause the device to suffer a greater physical impact, and the shaking 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, while interfering with the normal operation of the sensor, and ultimately affecting the accuracy of the bearing vibration detection instrument.

[0005] Therefore, we proposed a wind turbine bearing vibration monitoring and early warning device. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a wind turbine bearing vibration monitoring and early warning device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wind turbine bearing vibration monitoring and early warning device, comprising a nacelle and an auxiliary mechanism, wherein the inner wall of the nacelle is fixedly connected with a first fixing frame, the inner wall of the first fixing frame on a side away from the nacelle is fixedly connected with a generator, the output end of the generator is fixedly connected with a main shaft, the end of the main shaft away from the generator passes through the nacelle and is fixedly connected with a fan blade, the outer surface of the main shaft on a side close to the generator is fixedly sleeved with a fixing block, the outer surface of the fixing block is provided with a groove, the fan blade converts wind energy through the main shaft into electrical energy after passing through the generator, the first fixing frame plays a fixing role on the generator, and the auxiliary mechanism comprises: The second fixing bracket is fixedly sleeved on the outer surface of the generator, the bottom outer wall of the second fixing bracket is fixedly connected with a connecting rod, the inner wall of the connecting rod on a side away from the second fixing bracket is fixedly connected with a first spring, one end of the first spring away from the connecting rod is fixedly connected to the second fixing bracket, one end of the connecting rod away from the second fixing bracket is fixedly connected to the cabin, a detection component is arranged inside the second fixing bracket, the outer wall of the connecting rod on a side away from the second fixing bracket is fixedly connected with a first fixing shaft, one end of the first fixing shaft away from the connecting rod is fixedly connected with a first support rod, and the bottom of the first support rod is fixedly connected to the cabin.

[0008] According to the above technical solution, a second support rod is fixedly connected to the top inner wall of the cabin, and a driving motor is fixedly connected to the outer surface of the second support rod, the output end of the driving motor passes through the second support rod and is fixedly connected to a rotating shaft, and the end of the rotating shaft away from the driving motor is rotatably connected to the second fixed frame, and a sliding frame is provided at the output end of the driving motor, and the inner wall of the sliding frame is slidably connected to the rotating shaft and the first fixed shaft, and the second support rod has a certain buffering effect, which reduces the influence of the cabin vibration on the driving motor, and the driving motor causes the sliding frame to slide to one side through the rotating shaft, and the first fixed shaft makes the sliding frame more stable during the sliding process, and the driving motor causes the sliding frame to slide through the rotating shaft, and the first fixed shaft plays an auxiliary supporting role for the sliding frame.

[0009] The cam is connected to the second support frame by the at least one hydraulic cylinder, and the hydraulic rod is connected to the hydraulic rod of the first support frame by the hydraulic cylinder.

[0010] According to the above technical solution, the output end of the hydraulic rod passes through the first rotating frame and is fixedly connected with a force block, the inner wall of the force block is fixedly connected with a connecting frame, the outer wall of the connecting frame at one end away from the force block is fixedly connected with a second fixed shaft, the end of the second fixed shaft away from the connecting frame passes through the third fixed frame and is fixedly connected with a second spring, and the end of the second spring close to the connecting frame is fixedly connected to the third fixed frame, the hydraulic rod pushes the connecting frame to slide through the force block, and the connecting frame improves the stability of the connecting frame during movement by sliding between the second fixed shaft and the third fixed frame, and the second spring is used to absorb the vibration generated by the connecting frame during movement, and the number of the second fixed shafts is two, and the two second fixed shafts are symmetrically arranged with the central axis of the force block as the center.

[0011] According to the above technical solution, an auxiliary motor is fixedly connected to the inner wall of a side of the connecting frame 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, and a contact is fixedly connected to the inner wall of an end of the second rotating frame away from the auxiliary motor, and the auxiliary motor flips the contact toward the side of the fixed block groove through the second rotating frame, and the contact does not contact the groove opened on the outer surface of the fixed block, and the contact and the outer surface of the groove maintain a distance between the required safety range. When the main shaft generates a jitter beyond the safety range, the main shaft contacts the contact through the groove on the outer surface of the fixed block, and the auxiliary motor adjusts the angle between the contact and the groove through the second rotating frame, thereby ensuring that the main shaft can better contact the contact when vibrating outside the safety range.

[0012] According to the above technical solution, a vibration detector is fixedly connected to the inner wall of a side of the connecting frame close to the auxiliary motor, the output end of the vibration detector passes through the connecting frame and is fixedly connected to a detection rod, and a detection probe is fixedly connected to the outer wall of an end of the detection rod away from the vibration detector. The detection probe is slidably connected to the second rotating frame, and the detection probe transmits the vibration generated by the second rotating frame to the inside of the vibration detector through the detection rod, and the vibration generated by the second rotating frame is analyzed by the vibration detector. After the analysis is completed, a vibration monitoring early warning signal is issued by the vibration detector, and the number of the detection rods is two, and the two detection rods are symmetrically arranged with the central axis of the vibration detector as the center.

[0013] According to the above technical scheme, the hydraulic rod moves the connecting frame toward the side of the fixed block through the force block, and the auxiliary motor deflects the contact toward the side of the fixed block groove through the second rotating frame. When the main shaft vibrates, the main shaft contacts the contact through the fixed block and causes the second rotating frame to vibrate. The vibration detector contacts the second rotating frame through the detection probe fixedly connected to the outer surface of the detection rod, and analyzes the vibration through the vibration detector. The hydraulic rod is used to push the force block toward the side of the fixed block, and the auxiliary motor is used to adjust the second rotating frame and flip the contact toward the side of the fixed block. When the main shaft vibrates, the vibration detector detects the vibration of the second rotating frame through the detection probe. The outer wall of the second rotating frame close to the vibration detector is set to a semicircular shape, thereby ensuring that the detection probe can always contact the second rotating frame when the second rotating frame rotates.

[0014] 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: 1. The present invention provides a wind turbine bearing vibration monitoring and early warning device. In a windy and sandy environment, the second fixing frame of the wind turbine generator is auxiliary fixed to the outer surface of the generator. The first spring and the connecting rod reduce the influence of the cabin vibration on the detector, thereby 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.

[0015] 2. The present invention sets an auxiliary mechanism, and the driving motor causes the sliding frame to slide through the rotating shaft, and the sliding frame drives the first rotating frame to flip through the rotating rod. In this way, the distance between the contact and the fixed block is changed, thereby changing the vibration range that can be detected by the vibration detector, thereby preventing smaller vibrations from interfering with the results of the vibration detector monitoring the vibration of the main shaft.

[0016] 3. The present invention sets up a detection component, and the hydraulic rod pushes the connecting frame to move toward the fixed block. At the same time, the auxiliary motor drives the second rotating frame to flip toward the fixed block. The auxiliary motor controls the contact angle between the contact point and the groove surface on the outer surface of the fixed block to ensure that when the main shaft vibrates, the fixed block can better contact with the contact point, thereby improving the accuracy of the vibration detector's monitoring results of the main shaft vibration.

[0017] 4. The present invention sets contacts and vibration detectors. When the main shaft vibrates under the influence of the wind blades, the main shaft contacts the contacts with the help of the 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 situation. 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 understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall front structure of the present invention; Figure 2 It is a schematic diagram of the overall front cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the cabin of the present invention; Figure 4 It is a schematic diagram of the auxiliary mechanism structure of the present invention; Figure 5 It is a schematic diagram of the auxiliary mechanism structure of the present invention; Figure 6 It is a schematic diagram of the structure of the detection component of the present invention; Figure 7 It is a schematic diagram of the hydraulic rod structure of the present invention; Figure 8 It is a schematic diagram of the structure of the connecting frame of the present invention; Fig. 9 For the present invention Figure 2 Schematic diagram of the enlarged structure of A.

[0019] In the figure: 1, cabin; 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 component; 8101, first rotating frame; 8102, hydraulic rod; 8103, rotating rod; 8104, third fixed frame; 8105, connecting frame; 8106, force block; 8107, auxiliary motor; 8108, second rotating frame; 8109, contact; 81010, vibration detector; 81011, detection rod; 81012, detection probe; 81013, second fixed shaft; 81014, second spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example 1: See Figure 1-Figure 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, the inner wall of the nacelle 1 is fixedly connected with a first fixing frame 5, the inner wall of the first fixing frame 5 away from the nacelle 1 is fixedly connected with a generator 4, a contact surface between the first fixing frame and the generator is provided with a buffer pad to reduce the influence of the nacelle on the generator, the output end of the generator 4 is fixedly connected with a main shaft 3, the end of the main shaft 3 away from the generator 4 passes through the nacelle 1 and is fixedly connected with a fan blade 2, and the outer surface of the main shaft 3 close to the generator 4 is fixedly sleeved. There is a fixing block 6, the outer surface of the fixing block 6 is provided with a groove 7, the fan blade 2 converts the wind energy through the main shaft 3 and then through the generator 4 into electrical energy, the first fixing frame 5 plays a fixing role on the generator 4, the auxiliary mechanism 8, the fan blade 2 rotates under the push of the wind, and transmits the wind energy through the main shaft 3 to the generator 4 fixed by the first fixing frame 5 in the cabin 1, and the wind energy is converted into electrical energy through the generator 4. The fixing block 6 and the groove 7 on the fixing block 6 fixedly sleeved on the outer surface of the side of the main shaft 3 close to the generator 4 provide a basis for the subsequent vibration detector 81010 to detect the main shaft 3, including: The second fixing frame 801 is fixedly sleeved on the outer surface of the generator 4, the bottom outer wall of the second fixing frame 801 is fixedly connected with a connecting rod 802, the inner wall of the connecting rod 802 away from the second fixing frame 801 is fixedly connected with a first spring 803, one end of the first spring 803 away from the connecting rod 802 is fixedly connected to the second fixing frame 801, and one end of the connecting rod 802 away from the second fixing frame 801 is fixedly connected to the cabin 1, and a detection component 810 is arranged inside the second fixing frame 801, and the connecting rod 802 is away from the second fixing frame 80 A first fixed shaft 805 is fixedly connected to an outer wall of one side of 1, and an end of the first fixed shaft 805 away from the connecting rod 802 is fixedly connected to a first support rod 804, and 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, and the vibration generated between the connecting rod 802 and the cabin 1 is absorbed by the first spring 803, thereby improving the stability of the detection component 810 rotatably connected to the inner wall of the second fixed frame 801 during operation.

[0024] A second support rod 806 is fixedly connected to the top inner wall of the cabin 1, and a driving motor 807 is fixedly connected to the outer surface of the second support rod 806. The output end of the driving 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 driving motor 807 is rotatably connected to the second fixed frame 801. A sliding frame 809 is provided at the output end of the driving 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, which reduces the impact of the vibration of the cabin 1 on the driving motor 807. The driving motor 807 is fixedly connected to the rotating shaft 808 through the output end to drive the sliding frame 809 to slide to one side. The bottom of the sliding frame 809 is slidably connected to the first fixed shaft 805, and the stability of the sliding of the sliding frame 809 is ensured by the first fixed shaft 805.

[0025] Example 2: Please refer to Figure 6-Figure 9 On the basis of the first embodiment, 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, the inner wall of the first rotating frame 8101 is fixedly connected with a hydraulic rod 8102, the top inner wall of the first rotating frame 8101 is rotatably connected with a rotating rod 8103 through 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 the sliding frame 809, the outer surface of one side of the first rotating frame 8101 away from the rotating rod 8103 is fixedly sleeved with a third fixed frame 8104, and the inner wall of the third fixed frame 8104 The third fixed frame 8104 is fixedly connected to the hydraulic rod 8102 and plays an auxiliary supporting role for the hydraulic rod 8102. When the driving motor 807 is working, the output end of the driving motor 807 moves the sliding frame 809 toward the second support rod 806 through the rotating shaft 808, and the sliding frame 809 drives the first rotating frame 8101 to flip toward the fixed block 6 through 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 flipping angle, and the flipping angle of the first rotating frame 8101 is adjusted by the rotating rod 8103.

[0026] The output end of the hydraulic rod 8102 passes through the first rotating frame 8101 and is fixedly connected to a force block 8106. The inner wall of the force block 8106 is fixedly connected to a connecting frame 8105. The outer wall of the connecting frame 8105 away from the force block 8106 is fixedly connected to a second fixed shaft 81013. The end of the second fixed shaft 81013 away from the connecting frame 8105 passes through the third fixed frame 8104 and is fixedly connected to a second spring 81014. The end of the second spring 81014 close to 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 block 8106 to rotate. Sliding, the connecting frame 8105 improves the stability of the connecting frame 8105 during movement by sliding between the second fixed axis 81013 and the third fixed frame 8104. 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 relies on the sliding cooperation between the second fixed axis 81013 and the third fixed frame 8104. During the sliding process of the connecting frame 8105, the second spring 81014 is squeezed, thereby improving the stability of the connecting frame 8105 during movement.

[0027] An auxiliary motor 8107 is fixedly connected to the inner wall of the connecting frame 8105 on the side away from the force-bearing block 8106. The output end of the auxiliary motor 8107 runs 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 end of the second rotating frame 8108 away from the auxiliary motor 8107. The auxiliary motor 8107 flips the contact 8109 toward the groove 7 of the fixed block 6 through the second rotating frame 8108. When the main shaft 3 shakes beyond the safety 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 through the second rotating frame 8108 toward the vibration detector 81010, and the vibration of the wind turbine bearing is monitored and the abnormal situation is responded to through the vibration detector 81010.

[0028] A vibration detector 81010 is fixedly connected to the inner wall of one side of the connecting frame 8105 close to the auxiliary motor 8107. The output end of the vibration detector 81010 runs 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 the vibration data and sends out a vibration monitoring and early warning signal after the analysis is completed, thereby realizing the monitoring and early warning functions of the vibration condition of the second rotating frame 8108.

[0029] The hydraulic rod 8102 moves the connecting frame 8105 toward the fixed block 6 through the force block 8106, and the auxiliary motor 8107 deflects the contact 8109 toward the side of the groove 7 of the fixed block 6 through the second rotating frame 8108. When the main shaft 3 vibrates, the main shaft 3 contacts the contact 8109 through the fixed block 6, and causes the second rotating frame 8108 to vibrate. The vibration detector 81010 contacts the second rotating frame 8108 through the detection probe 81012 fixedly connected to the outer surface of the detection rod 81011, and analyzes the vibration through the vibration detector 81010. The hydraulic rod 8102 is used to move the force block 8106 toward Pushing along one side of the fixed block 6, the auxiliary motor 8107 is used to adjust the second rotating frame 8108 and flip the contact 8109 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 is affected by the fan blade 2 and vibrates, the main shaft 3 contacts the contact 8109 with the help of the fixed block 6, causing the second rotating frame 8108 to vibrate. The detection probe 81012 on the detection rod 81011 is fixedly connected to the outer wall of the vibration detector 81010 and contacts the second rotating frame 8108 to analyze the vibration of the main shaft 3.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in 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 the inner wall of the nacelle (1) is fixedly connected to a first fixing frame (5), the inner wall of the first fixing frame (5) on a side away from the nacelle (1) is fixedly connected to a generator (4), the output end of the generator (4) is fixedly connected to a main shaft (3), the end of the main shaft (3) away from the generator (4) passes through the nacelle (1) and is fixedly connected to a fan blade (2), the outer surface of the main shaft (3) on a side close to the generator (4) is fixedly sleeved with a fixing block (6), the outer surface of the fixing block (6) is provided with a groove (7), the first fixing frame (5) plays a fixing role on the generator (4), and the characteristics are: The auxiliary mechanism (8) comprises: A second fixing frame (801), the second fixing frame (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 fixing frame (801), a first spring (803) is fixedly connected to the inner wall of a side of the connecting rod (802) away from the second fixing frame (801), an end of the first spring (803) away from the connecting rod (802) is fixedly connected to the second fixing frame (801), and an end of the connecting rod (802) away from the second fixing frame (801) is fixedly connected to the cabin. (1) fixed connection, wherein a detection assembly (810) is arranged inside the second fixing frame (801), a first fixing shaft (805) is fixedly connected to an outer wall of a side of the connecting rod (802) away from the second fixing frame (801), an end of the first fixing shaft (805) away from the connecting rod (802) is fixedly connected to a first support rod (804), a bottom of the first support rod (804) is fixedly connected to the cabin (1), and a first spring (803) is used to absorb vibration generated between the connecting rod (802) and the cabin (1).

2. A wind turbine bearing vibration monitoring and early warning device according to claim 1, characterized in that: A second support rod (806) is fixedly connected to the inner wall of the top of the cabin (1); a driving motor (807) is fixedly connected to the outer surface of the second support rod (806); an output end of the driving motor (807) passes through the second support rod (806) and is fixedly connected to a rotating shaft (808); an end of the rotating shaft (808) away from the driving motor (807) is rotatably connected to a second fixed frame (801); a sliding frame (809) is provided at the output end of the driving motor (807); an inner wall of the sliding frame (809) is slidably connected to the rotating shaft (808) and the first fixed shaft (805); and the sliding frame (809) is supported at the bottom by the first fixed shaft (805).

3. A wind turbine bearing vibration monitoring and early warning device according to claim 2, characterized in that: The detection assembly (810) comprises 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; an 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 a side 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), so that the first rotating frame (8101) is flipped toward the side of the main shaft (3).

4. A wind turbine bearing vibration monitoring and early warning device according to claim 3, 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); the inner wall of the force-bearing block (8106) is fixedly connected to a connecting frame (8105); the outer wall of the connecting frame (8105) at one end away from the force-bearing block (8106) is fixedly connected to a second fixed shaft (81013); the end of the second fixed shaft (81013) away from the connecting frame (8105) is fixedly connected to a second spring (81014); the second spring (81014) is close to the connecting frame One end of the frame (8105) is fixedly connected to the third fixed frame (8104), the second fixed shaft (81013) passes through (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), and the vibration of the connecting frame (8105) during the movement is absorbed by the second spring (81014).

5. A wind turbine bearing vibration monitoring and early warning device according to claim 4, characterized in that: An auxiliary motor (8107) is fixedly connected to the inner wall of the connecting frame (8105) at one side away from the force-bearing 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 one end of the second rotating frame (8108) away from the auxiliary motor (8107); the contact (8109) does not contact the groove (7) provided on the outer surface of the fixed block (6), and a safe distance is maintained between the contact (8109) and the outer surface of the groove (7).

6. A wind turbine bearing vibration monitoring and early warning device according to claim 5, characterized in that: A vibration detector (81010) is fixedly connected to the inner wall of one side of the connecting frame (8105) close to 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 one 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); and after the analysis is completed, a vibration monitoring warning signal is issued by the vibration detector (81010).

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

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