A dynamic balancing testing device based on wind turbine gearbox

Abstract

This invention provides a dynamic balancing detection device based on a wind turbine gearbox, relating to the field of dynamic balancing detection technology. It includes: a main drive shaft, with a coupling snapped onto its side; a support frame rotatably connected to the outer surface of the shaft; a triggering mechanism on the inner wall of the support frame; a first rotating roller rotatably connected to the side wall of the support frame; a support plate fixedly connected to the end of the first rotating roller away from the support frame; and a second rotating roller fixedly connected to the end of the support plate away from the first rotating roller. A balancing mechanism is provided inside the second rotating roller. Through the linkage design between the triggering mechanism and the shaft, when the shaft deviates, a metal block contacts the trigger block, rapidly triggering electrical signal transmission, achieving immediate detection of the imbalance. The balancing mechanism automatically adjusts the counterweight according to the degree of imbalance, thus achieving immediate detection of the imbalance. Furthermore, by increasing the reverse centrifugal force to counteract the deviating force, it achieves the effect of precise dynamic balance correction.

Description

Technical Field

[0001] This invention relates to the field of dynamic balancing testing technology, and in particular to a dynamic balancing testing device based on a wind turbine gearbox. Background Technology

[0002] In the field of wind power generation, the gearbox of a wind turbine generator set is the core component for energy transmission, and its operational stability directly affects the generator set's power generation efficiency and service life. During long-term high-speed operation, the gearbox is prone to dynamic imbalance problems due to factors such as gear meshing wear, changes in bearing clearance, and accumulation of assembly errors.

[0003] Dynamic imbalance can cause severe vibrations during gearbox operation. The rotation of the shaft can cause vibrations to one side, and may also cause unit resonance, resulting in serious malfunctions such as gearbox housing cracking and loose connecting bolts, or even shutdown accidents, increasing operation and maintenance costs.

[0004] Currently, the dynamic balance testing and adjustment of wind turbine gearboxes mainly relies on offline testing equipment, which requires disassembling the gearbox from the turbine for testing. This results in long testing cycles, complex operations, and reduced power generation efficiency. Existing online testing devices are often structurally complex, making it difficult to accurately identify the direction and degree of imbalance. Furthermore, the balancing process requires manual intervention, leading to slow response times and failing to meet the requirements for continuous and stable operation of wind turbines. Therefore, developing a device capable of real-time detection and automatic dynamic adjustment of the gearbox's dynamic balance has become a crucial technological requirement in the wind power equipment field. Summary of the Invention

[0005] This invention solves the problems mentioned in the background art by real-time self-checking and automatic precise adjustment of balance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a dynamic balancing detection device based on a wind turbine gearbox, comprising: a main drive shaft, a coupling snapped onto the side of the main drive shaft, a rotating shaft snapped onto the end of the coupling away from the main drive shaft, a support frame rotatably connected to the outer surface of the rotating shaft, a triggering mechanism provided on the inner wall of the support frame, a first rotating roller rotatably connected to the side wall of the support frame, a support plate fixedly connected to the end of the first rotating roller away from the support frame, a second rotating roller fixedly connected to the end of the support plate away from the first rotating roller, and a balancing mechanism provided inside the second rotating roller;

[0007] The balancing mechanism includes a connecting frame, a counterweight is slidably connected inside the connecting frame, a slot is provided at the center of the counterweight, and round holes are provided on both sides of the counterweight near the slot. A support plate is movably connected to the lower side of the counterweight near the round holes, a pull rope is fixedly connected to the upper surface of the support plate, and a reel is fixedly connected to the end of the pull rope away from the support plate. A locking block is rotatably connected inside the side wall of the connecting frame near the counterweight, a movable groove is provided on the side of the connecting frame near the locking block, a slider is slidably connected inside the movable groove, a locking plate is fixedly connected to the top of the slider, an electromagnet is fixedly connected inside the slider, and a return spring is fixedly connected to the bottom of the slider.

[0008] Preferably, a first transmission gear is fixedly connected to the surface of the rotating shaft, a second transmission gear meshes with the side of the first transmission gear, a third transmission gear meshes with the side of the second transmission gear away from the first transmission gear, an internal gear is fixedly connected to the inner sidewall of the first rotating roller, a connecting block is fixedly connected to the surface of the rotating shaft away from the first transmission gear, a magnetic block is fixedly connected inside the connecting block, and a support rod is fixedly connected to the outer surface of the connecting block.

[0009] The triggering mechanism includes a mounting bracket with an internal movable cavity. A slide plate is slidably connected inside the movable cavity. A limit spring is fixedly connected to the top of the slide plate. A metal block is fixedly connected to the side wall of the slide plate. A trigger block is fixedly connected to the side wall of the movable cavity. A slide rod is fixedly connected to the bottom of the slide plate. A limit hole is formed on the side wall of the slide rod. Square grooves are formed on both sides of the slide rod on the mounting bracket. Limit blocks are slidably connected inside the square grooves. A push-out spring is fixedly connected to the side of the limit block near the bottom of the square groove. An elastic block is fixedly connected to the end of the slide rod away from the slide plate.

[0010] Preferably, the main drive shaft is the output shaft of the gearbox, the rotating shaft is on the same axis as the main drive shaft, and a rotating hole is provided at the center of the support frame, and the rotating shaft is rotatably connected inside the rotating hole.

[0011] Preferably, there are two support frames, which are rotatably connected to the ends of the first rotating roller and the second rotating roller, respectively. The triggering mechanism is located inside the support frame near the first rotating roller. The mounting frame is fixedly connected to the inner side wall of the support frame. There are six mounting frames, which are located on the same plane and are evenly distributed on the surface of the inner wall of the support frame. The elastic block is an arc-shaped block and fits against the surface of the rotating shaft.

[0012] Preferably, the limiting block is a wedge-shaped block, the limiting hole is a wedge-shaped hole, and the limiting block is engaged inside the limiting hole.

[0013] Preferably, the metal block is slidably connected to the surface of the trigger block, and the metal block is connected to a power source. The trigger block is connected to an electromagnet via a wire. There are 10 trigger blocks, and the 10 trigger blocks are evenly arranged on the side wall of the movable cavity.

[0014] Preferably, the first transmission gear is located inside the first rotating roller, the connecting block is located inside the second rotating roller, and a support frame is rotatably connected to the side of the second rotating roller away from the first rotating roller.

[0015] Preferably, the connecting frame is fixedly connected to the inner side wall of the second rotating roller. There are six connecting frames, located on the same plane and evenly distributed on the inner surface of the second rotating roller. There are six support rods, evenly distributed at the center of each connecting frame and located on the same axis as the slot.

[0016] Preferably, there are 10 counterweights, and the counterweights are thin sheets made of cast iron. The pull rope is inserted inside the circular hole, the reel is rotatably connected to the outer surface of the second rotating roller, and the diameter of the support plate is larger than the diameter of the circular hole.

[0017] Preferably, the counterweight has a snap-fit ​​hole on its side wall, the snap-fit ​​block snaps into the snap-fit ​​hole, and the snap-fit ​​block has a toothed groove on its side wall. The snap-fit ​​plate has a toothed block on the surface near the snap-fit ​​block, and the toothed block snaps into the toothed groove. There are two electromagnets, which are fixedly connected to the inside of the slider and the bottom of the movable groove, respectively, and the near ends of the two electromagnets are opposite magnetic poles.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0019] 1. In this invention, through the linkage design of the trigger mechanism and the rotating shaft, the vibration signal can be captured in real time when the gearbox vibrates due to dynamic imbalance. When the rotating shaft moves to the side, the elastic block is impacted and drives the slide rod to move, so that the metal block contacts the trigger block, quickly triggering the transmission of electrical signals, thereby realizing the instant detection of the imbalance state. The balancing mechanism can automatically adjust the counterweight according to the degree of imbalance through the cooperation of electromagnet, counterweight and magnetic block. The combination design of multiple counterweight blocks can adapt to different degrees of imbalance, thereby realizing the instant detection of the imbalance state without manual intervention, with fast response speed, and by increasing the centrifugal force in the opposite direction to counteract the bias force, the effect of dynamic balance and precise correction is achieved.

[0020] 2. In this invention, the gearbox is directly connected to the main drive shaft of the gearbox via a coupling, eliminating the need to modify the gearbox itself. It has strong adaptability and can be applied to gearboxes of different models of wind turbine generator sets. Real-time dynamic balance adjustment effectively reduces vibration caused by gearbox imbalance, slows down the wear rate of parts, extends the service life of the gearbox, and reduces the number of downtime maintenance, thereby improving the operating efficiency of the wind turbine generator set and reducing operation and maintenance costs. Attached Figure Description

[0021] Figure 1 This invention presents a frontal three-dimensional structural diagram of the equipment group in a dynamic balancing testing device based on a wind turbine gearbox.

[0022] Figure 2 This invention presents a three-dimensional cross-sectional view of the second rotating roller in a dynamic balancing testing device based on a wind turbine gearbox.

[0023] Figure 3 This invention provides a cross-sectional three-dimensional structural diagram of the first and second rotating rollers in a dynamic balancing testing device based on a wind turbine gearbox.

[0024] Figure 4 This invention presents a three-dimensional structural diagram of the first rotating roller in a dynamic balancing testing device based on a wind turbine gearbox.

[0025] Figure 5 This invention provides a cross-sectional planar structural diagram of the support frame in a dynamic balancing testing device based on a wind turbine gearbox.

[0026] Figure 6 A front cross-sectional planar structural diagram of the triggering mechanism in a dynamic balancing detection device based on a wind turbine gearbox is provided for this invention.

[0027] Figure 7 This invention provides a cross-sectional planar structural diagram of the No. 1 rotating roller in a dynamic balancing testing device based on a wind turbine gearbox.

[0028] Figure 8 This invention provides a cross-sectional planar structural diagram of the second rotating roller in a dynamic balancing testing device based on a wind turbine gearbox.

[0029] Figure 9 This invention provides a front cross-sectional planar structural schematic diagram of the balancing mechanism in a dynamic balancing detection device based on a wind turbine gearbox.

[0030] Figure 10 This invention proposes a dynamic balancing testing device based on a wind turbine generator gearbox. Figure 9 A magnified structural diagram at point A.

[0031] Legend: 1. Main drive shaft; 2. Coupling; 3. Rotating shaft; 4. Support frame; 5. Triggering mechanism; 501. Mounting bracket; 502. Movable cavity; 503. Slide plate; 504. Limiting spring; 505. Metal block; 506. Triggering block; 507. Slide rod; 508. Limiting hole; 509. Square groove; 510. Limiting block; 511. Ejection spring; 512. Elastic block; 6. Rotating roller No. 1; 7. Transmission gear No. 1; 8. Transmission gear No. 2; 9. Transmission gear No. 3 10. Wheel; 11. Internal gear; 12. Support plate; 13. No. 2 rotating roller; 14. Balancing mechanism; 15. Connecting frame; 16. Counterweight block; 17. Slot; 18. Round hole; 19. Support plate; 20. Pull rope; 21. Reel; 22. Snap-fit ​​block; 33. Movable groove; 44. Slider; 55. Snap-fit ​​plate; 66. Electromagnet; 77. Reset spring; 88. Connecting block; 99. Magnetic block; 10. Support rod. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0033] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0034] In an embodiment of the present invention, reference is made to Figures 1-5 As shown: A dynamic balancing testing device based on a wind turbine generator gearbox includes: a main drive shaft 1, a coupling 2 clamped to the side of the main drive shaft 1, a rotating shaft 3 clamped to the end of the coupling 2 away from the main drive shaft 1, a support frame 4 rotatably connected to the outer surface of the rotating shaft 3, the main drive shaft 1 being the output shaft of the gearbox, the rotating shaft 3 and the main drive shaft 1 being on the same axis, a rotating hole being opened at the center of the support frame 4, the rotating shaft 3 being rotatably connected inside the rotating hole, when the gearbox rotates, the resulting biased vibration can be transmitted to the inside of the main drive shaft 1, the main drive shaft 1 and the rotating shaft 3 can rotate coaxially, causing the rotating shaft 3 to follow the biased vibration of the main drive shaft 1.

[0035] The inner wall of the support frame 4 is provided with a triggering mechanism 5. The side wall of the support frame 4 is rotatably connected to a first rotating roller 6. The end of the first rotating roller 6 away from the support frame 4 is fixedly connected to a support plate 11. The end of the support plate 11 away from the first rotating roller 6 is fixedly connected to a second rotating roller 12. Support plates 11 are fixedly connected to the first rotating roller 6 and the second rotating roller 12 at their close proximity. Threaded holes are opened on the surface of the two support plates 11. The two support plates 11 are fixedly connected together by bolts.

[0036] The second rotating roller 12 is equipped with a balancing mechanism 13 inside. The second rotating roller 12 can rotate coaxially with the first rotating roller 6, and the balancing mechanism 13 inside the second rotating roller 12 can rotate with it.

[0037] A first transmission gear 7 is fixedly connected to the surface of the rotating shaft 3. A second transmission gear 8 meshes with the side of the first transmission gear 7. A third transmission gear 9 meshes with the side of the second transmission gear 8 away from the first transmission gear 7. An internal gear 10 is fixedly connected to the inner side wall of the first rotating roller 6. The gear ratio of the first transmission gear 7, the second transmission gear 8, the third transmission gear 9 and the internal gear 10 is 1:1, so that the first transmission gear 7 is driven by the second transmission gear 8 and the third transmission gear 9, and the third transmission gear 9 meshes with the internal gear 10 inside the first rotating roller 6, so that the first rotating roller 6 can rotate in the same direction as the internal gear 10.

[0038] A connecting block 14 is fixedly connected to the surface of the rotating shaft 3 away from the first transmission gear 7. The first transmission gear 7 is located inside the first rotating roller 6. The connecting block 14 is located inside the second rotating roller 12. A support frame 4 is rotatably connected to the side of the second rotating roller 12 away from the first rotating roller 6. There are two support frames 4. The support frame 4 closer to the first rotating roller 6 is equipped with a trigger mechanism 5. The support frame 4 away from the first rotating roller 6 is hollow. A rotating groove is opened on the side wall of the support frame 4. A connecting shaft is fixedly connected to the side of both the first rotating roller 6 and the second rotating roller 12. The connecting shaft is inserted into the rotating groove, so that the first rotating roller 6 and the second rotating roller 12 can rotate on the surface of the support frame 4 on both sides. A magnetic block 15 is fixedly connected inside the connecting block 14. A support rod 16 is fixedly connected to the outer surface of the connecting block 14.

[0039] In this embodiment of the invention, specifically: when the gearbox rotates and wind power generation is performed simultaneously, the main drive shaft 1 rotates, and the main drive shaft 1 is connected to the rotating shaft 3 through the coupling 2, so that the rotating shaft 3 and the main drive shaft 1 rotate coaxially. When the dynamic balance of the gearbox is unbalanced, the main drive shaft 1 vibrates in a biased manner. The main drive shaft 1 and the rotating shaft 3 rotate coaxially, so that the vibration amplitude of the rotating shaft 3 is the same, thereby transmitting the dynamic balance imbalance phenomenon of the gearbox to the outside of the gearbox.

[0040] The rotation of the shaft 3 drives the first transmission gear 7 to rotate. The first transmission gear 7 rotates through the second transmission gear 8 and the third transmission gear 9, which in turn drives the first rotating roller 6, which has an internal gear fixedly connected inside, to rotate. The gear ratio of the first transmission gear 7, the second transmission gear 8, the third transmission gear 9 and the internal gear 10 is 1:1, so that the first rotating roller 6 rotates at the same speed as the shaft 3.

[0041] In some embodiments, according to Figures 4-6As shown: The triggering mechanism 5 includes a mounting bracket 501, which is fixedly connected to the inner side wall of the support frame 4. There are six mounting brackets 501, which are located on the same plane and are evenly distributed on the surface of the inner wall of the support frame 4.

[0042] The mounting bracket 501 has an internal movable cavity 502. A slide plate 503 is slidably connected inside the movable cavity 502. A limit spring 504 is fixedly connected to the top of the slide plate 503. A metal block 505 is fixedly connected to the side wall of the slide plate 503. A trigger block 506 is fixedly connected to the side wall of the movable cavity 502. The metal block 505 is slidably connected to the surface of the trigger block 506 and is connected to a power source. There are 10 trigger blocks 506, which are evenly arranged on the side wall of the movable cavity 502. The limit spring 504 can provide support force to the slide plate 503. The contact between the metal block 505 and the trigger block 506 can transmit current through the trigger block 506.

[0043] The bottom of the slide plate 503 is fixedly connected to a slide rod 507. The side wall of the slide rod 507 is provided with a limiting hole 508. The mounting bracket 501 is provided with square grooves 509 on both sides of the slide rod 507. A limiting block 510 is slidably connected inside the square groove 509. The limiting block 510 is a wedge-shaped block, and the limiting hole 508 is a wedge-shaped hole. The limiting block 510 is engaged inside the limiting hole 508. The mutual engagement between the limiting block 510 and the limiting hole 508 limits the slide rod 507 inside the mounting bracket 501.

[0044] A push-out spring 511 is fixedly connected to the side of the limiting block 510 near the bottom of the square groove 509, and an elastic block 512 is fixedly connected to the end of the slide rod 507 away from the slide plate 503. The elastic block 512 is an arc-shaped block and fits against the surface of the rotating shaft 3.

[0045] In this embodiment of the invention, specifically: when the main drive shaft 1 rotates, it drives the rotating shaft 3 to rotate through the coupling 2. When the main drive shaft 1 produces a small and brief bias vibration, the elastic block 512 on the surface of the rotating shaft 3 can provide support for the main drive shaft 1, and the rotation of the main drive shaft 1 remains stable.

[0046] When the main drive shaft 1 generates a large eccentric vibration, the synchronous rotating shaft 3 follows its eccentric vibration. The eccentric vibration of the rotating shaft 3 will impact the elastic block 512 in that direction. At this time, the elastic block 512 drives the slide rod 507 to slide into the mounting bracket 501. The limiting block 510 overcomes the elastic force of the ejector spring 511 and moves into the square groove 509. At this time, the slide plate 503 slides into the movable cavity 502. The metal block 505 on the side of the slide plate 503 slides towards the surface of the trigger block 506. At this time, the trigger block 506 receives the electrical signal and transmits the electrical signal synchronously, realizing automatic triggering when the main drive shaft 1 is polarized.

[0047] In some embodiments, according to Figures 4-10 As shown, the balancing mechanism 13 includes a connecting frame 1301, a counterweight 1302 is slidably connected inside the connecting frame 1301, a slot 1303 is provided at the center of the counterweight 1302, the connecting frame 1301 is fixedly connected to the inner side wall of the second rotating roller 12, there are six connecting frames 1301, located on the same plane, and evenly distributed on the inner surface of the second rotating roller 12, and there are six support rods 16, evenly distributed at the center of each connecting frame 1301, and located on the same axis as the slot 1303.

[0048] The counterweight 1302 has round holes 1304 on both sides near the slot 1303. A support plate 1305 is movably connected to the lower side of the counterweight 1302 near the round holes 1304. A pull rope 1306 is fixedly connected to the upper surface of the support plate 1305. A reel 1307 is fixedly connected to the end of the pull rope 1306 away from the support plate 1305. There are 10 counterweights 1302, and the counterweights 1302 are thin sheets made of cast iron. The pull rope 1306 is inserted inside the round holes 1304. The reel 1307 is rotatably connected to the outer surface of the second rotating roller 12. The diameter of the support plate 1305 is larger than the diameter of the round holes 1304. When the equipment maintenance personnel perform maintenance on the gearbox, they can reset the counterweights 1302 back into the connecting frame 1301 by rotating the reel 1307.

[0049] The connecting frame 1301 is rotatably connected to the snap-fit ​​block 1308 inside the side wall near the counterweight 1302. A torsion spring is elastically connected at the axis of the snap-fit ​​block 1308, so that when the snap-fit ​​block 1308 is not snapped by the snap-fit ​​plate 1311, the snap-fit ​​block 1308 rotates under the action of the torsion spring, and the snap-fit ​​block 1308 separates from the counterweight 1302.

[0050] The connecting frame 1301 has a movable groove 1309 on the side near the snap-fit ​​block 1308. A slider 1310 is slidably connected inside the movable groove 1309. A snap-fit ​​plate 1311 is fixedly connected to the top of the slider 1310. A snap-fit ​​hole is opened on the side wall of the counterweight block 1302. The snap-fit ​​block 1308 is snapped into the inside of the snap-fit ​​hole. The side wall of the snap-fit ​​block 1308 is provided with a tooth groove. The surface of the snap-fit ​​plate 1311 near the snap-fit ​​block 1308 is provided with a tooth block. The tooth block and the tooth groove are snapped into each other.

[0051] An electromagnet 1312 is fixedly connected inside the slider 1310. A trigger block 506 is connected to the electromagnet 1312 via a wire. The direction of the trigger block 506 and the position of the connected electromagnet 1312 are symmetrical and opposite around the axis of rotation 3. Ten trigger blocks 506 and ten sets of electromagnets 1312 are connected to each other from bottom to top. There are ten sets of electromagnets 1312, which are evenly distributed on the side of the slider 1310. The two electromagnets 1312 in each set are fixedly connected inside the slider 1310 and at the bottom of the movable groove 1309, respectively. The near ends of the two electromagnets 1312 are opposite magnetic poles. A return spring 1313 is fixedly connected to the bottom of the slider 1310.

[0052] In this embodiment of the invention, specifically: when the metal block 505 in the triggering mechanism 5 is in contact with the triggering block 506, the electrical signal is transmitted through the wire to the electromagnet 1312 inside the connecting frame 1301 symmetrical to the axis of the rotating shaft 3. The electromagnet 1312 is energized and generates magnetism. The slider 1310 and the electromagnet 1312 inside the movable groove 1309 attract each other under the action of magnetism. The slider 1310 moves into the movable groove 1309. When the slider 1310 slides, it causes the snap plate 1311 at its top to separate from the snap block 1308. The snap block 1308 rotates under the action of the torsion spring and separates from the counterweight 1302. At this time, the counterweight 1302 is attracted to the surface of the connecting block 14 under the action of the magnetic block 15, and counterweights one side of the rotating shaft 3, so that when the rotating shaft 3 rotates, the centrifugal bias force on that side increases, and the rotating shaft 3 is corrected.

[0053] Ten trigger blocks 506 are connected to ten electromagnets 1312. When the deflection angle of the rotating shaft 3 is large, the metal block 505 is pushed to contact the multiple trigger blocks 506. At this time, multiple counterweights 1302 counterweight the rotating shaft 3 in the opposite direction of deflection, increasing the centrifugal force in the opposite direction of the rotating shaft 3. The increased centrifugal force cancels out the deflection force of the rotating shaft 3, maintaining the stability of the rotation of the rotating shaft 3. The rotating shaft 3 is connected to the main drive shaft 1 through the coupling 2, so that the deflection force of the main drive shaft 1 is canceled out, maintaining the dynamic balance of the rotation of the main drive shaft 1.

[0054] Working principle: When the gearbox rotates and generates wind power synchronously, the main drive shaft 1 rotates. The main drive shaft 1 is connected to the rotating shaft 3 through the coupling 2, so that the rotating shaft 3 and the main drive shaft 1 rotate coaxially. When the dynamic balance of the gearbox is unbalanced, the main drive shaft 1 vibrates in a biased manner. The main drive shaft 1 and the rotating shaft 3 rotate coaxially, so that the vibration amplitude of the rotating shaft 3 is the same, thus transmitting the dynamic balance imbalance phenomenon of the gearbox to the outside of the gearbox.

[0055] The rotation of the shaft 3 drives the first transmission gear 7 to rotate. The first transmission gear 7 rotates through the second transmission gear 8 and the third transmission gear 9, which in turn drives the first rotating roller 6, which has an internal gear fixedly connected inside, to rotate. The gear ratio of the first transmission gear 7, the second transmission gear 8, the third transmission gear 9 and the internal gear 10 is 1:1, so that the first rotating roller 6 rotates at the same speed as the shaft 3.

[0056] When the main drive shaft 1 rotates, it drives the rotating shaft 3 to rotate through the coupling 2. When the main drive shaft 1 produces a small and brief bias vibration, the elastic block 512 on the surface of the rotating shaft 3 can provide support for the main drive shaft 1, and the rotation of the main drive shaft 1 remains stable. When the main drive shaft 1 produces a large bias vibration, the rotating shaft 3 follows its bias vibration. The bias vibration of the rotating shaft 3 will impact the elastic block 512 in that direction. At this time, the elastic block 512 drives the slide rod 507 to slide into the mounting bracket 501. The limiting block 510 overcomes the elastic force of the ejector spring 511 and moves into the square groove 509. At this time, the slide plate 503 slides into the movable cavity 502. The metal block 505 on the side of the slide plate 503 slides towards the surface of the trigger block 506. At this time, the trigger block 506 receives the electrical signal and transmits the electrical signal synchronously, realizing automatic triggering when the main drive shaft 1 is polarized.

[0057] When the metal block 505 in the triggering mechanism 5 comes into contact with the triggering block 506, the electrical signal is transmitted through the wire to the electromagnet 1312 inside the connecting frame 1301, which is symmetrical about the axis of the rotating shaft 3. The electromagnet 1312 is energized and generates magnetism. The slider 1310 and the electromagnet 1312 inside the movable groove 1309 attract each other under the action of magnetism. The slider 1310 moves into the movable groove 1309. When the slider 1310 slides, it causes the locking plate 1311 at its top to separate from the locking block 1308. The locking block 1308 rotates under the action of the torsion spring and separates from the counterweight 1302. At this time, the counterweight 1302 is attracted to the surface of the connecting block 14 under the action of the magnetic block 15, which counterweights one side of the rotating shaft 3, so that when the rotating shaft 3 rotates, the centrifugal bias force on that side increases, and the rotating shaft 3 is corrected.

[0058] Ten trigger blocks 506 are connected to ten electromagnets 1312. When the deflection angle of the rotating shaft 3 is large, the metal block 505 is pushed to contact the multiple trigger blocks 506. At this time, multiple counterweights 1302 counterweight the rotating shaft 3 in the opposite direction of deflection, increasing the centrifugal force in the opposite direction of the rotating shaft 3. The increased centrifugal force cancels out the deflection force of the rotating shaft 3, maintaining the stability of the rotation of the rotating shaft 3. The rotating shaft 3 is connected to the main drive shaft 1 through the coupling 2, so that the deflection force of the main drive shaft 1 is canceled out, maintaining the dynamic balance of the rotation of the main drive shaft 1.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A dynamic balancing testing device based on a wind turbine generator gearbox, characterized in that, include: A main drive shaft (1) is connected to a coupling (2) on its side. A rotating shaft (3) is connected to the end of the coupling (2) away from the main drive shaft (1). A support frame (4) is rotatably connected to the outer surface of the rotating shaft (3). A triggering mechanism (5) is provided on the inner wall of the support frame (4). A first rotating roller (6) is rotatably connected to the side wall of the support frame (4). The first rotating roller (6) rotates at the same speed as the rotating shaft (3). A support plate (11) is fixedly connected to the end of the first rotating roller (6) away from the support frame (4). A second rotating roller (12) is fixedly connected to the end of the support plate (11) away from the first rotating roller (6). A balancing mechanism (13) is provided inside the second rotating roller (12). A connecting block (14) is fixedly connected to the surface of the rotating shaft (3). A magnetic block (15) is fixedly connected inside the connecting block (14). The triggering mechanism (5) includes a mounting frame (501), which is evenly arranged and fixedly connected to the surface of the inner wall of the support frame (4). The mounting frame (501) has an active cavity (502) inside. A sliding plate (503) is slidably connected inside the active cavity (502). A metal block (505) is fixedly connected to the side wall of the sliding plate (503). A trigger block (506) is fixedly connected to the side wall of the active cavity (502). The metal block (505) is slidably connected to the surface of the trigger block (506) and is connected to a power source. The trigger blocks (506) are evenly arranged on the side wall of the active cavity (502). A sliding rod (507) is fixedly connected to the bottom of the sliding plate (503). An elastic block (512) is fixedly connected to the end of the sliding rod (507) away from the sliding plate (503). The elastic block (512) is attached to the surface of the rotating shaft (3). The balancing mechanism (13) includes a connecting frame (1301), which is evenly arranged and fixedly connected to the inner wall of the second rotating roller (12). A counterweight (1302) is slidably connected inside the connecting frame (1301). A snap-fit ​​hole is provided on the side wall of the counterweight (1302). A snap-fit ​​block (1308) is rotatably connected inside the side wall of the connecting frame (1301) near the counterweight (1302). A movable groove (1309) is provided on the side of the connecting frame (1301) near the snap-fit ​​block (1308). A slider (1310) is slidably connected inside the movable groove (1309). A snap-fit ​​plate (1311) is fixedly connected to the top of the slider (1310). The side wall of the snap-fit ​​block (1308) is provided with a toothed groove. The surface of the snap-fit ​​plate (1311) near the snap-fit ​​block (1308) is provided with a toothed block. An electromagnet (1312) is fixedly connected inside the slider (1310). The trigger block (506) is connected to the electromagnet (1312) through a wire. The direction of the trigger block (506) is symmetrical and opposite to the position of the electromagnet (1312) around the axis of rotation (3). The trigger block (506) and the electromagnet (1312) are connected to each other from bottom to top. The electromagnets (1312) are in groups of two. Each group of two electromagnets (1312) is fixedly connected inside the slider (1310) and at the bottom of the movable groove (1309).

2. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 1, characterized in that: A first transmission gear (7) is fixedly connected to the surface of the rotating shaft (3). A second transmission gear (8) meshes with the side of the first transmission gear (7). A third transmission gear (9) meshes with the side of the second transmission gear (8) away from the first transmission gear (7). An internal gear (10) is fixedly connected to the inner side wall of the first rotating roller (6). A support rod (16) is fixedly connected to the outer surface of the connecting block (14). A limiting spring (504) is fixedly connected to the top of the slide plate (503), and a limiting hole (508) is opened on the side wall of the slide rod (507). The mounting bracket (501) is provided with square grooves (509) on both sides of the slide rod (507). A limiting block (510) is slidably connected inside the square groove (509), and an ejector spring (511) is fixedly connected to the side of the limiting block (510) near the bottom of the square groove (509).

3. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 1, characterized in that: A slot (1303) is provided at the center of the counterweight (1302). Circular holes (1304) are provided on both sides of the counterweight (1302) near the slot (1303). A support plate (1305) is movably connected to the lower side of the counterweight (1302) near the circular holes (1304). A pull rope (1306) is fixedly connected to the upper surface of the support plate (1305). A scroll (1307) is fixedly connected to one end of the pull rope (1306) away from the support plate (1305). A return spring (1313) is fixedly connected to the bottom of the slider (1310).

4. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 2, characterized in that: The main drive shaft (1) is the output shaft of the gearbox. The rotating shaft (3) is on the same axis as the main drive shaft (1). A rotating hole is provided at the center of the support frame (4). The rotating shaft (3) is rotatably connected inside the rotating hole.

5. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 1, characterized in that: There are two support frames (4), which are rotatably connected to the ends of the first rotating roller (6) and the second rotating roller (12), respectively. The triggering mechanism (5) is located inside the support frame (4) on the side close to the first rotating roller (6).

6. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 2, characterized in that: The limiting block (510) is a wedge-shaped block, the limiting hole (508) is a wedge-shaped hole, and the limiting block (510) is engaged inside the limiting hole (508).

7. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 2, characterized in that: The first transmission gear (7) is located inside the first rotating roller (6), the connecting block (14) is located inside the second rotating roller (12), and the second rotating roller (12) is rotatably connected to the support frame (4) on the side away from the first rotating roller (6).

8. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 2, characterized in that: There are six support rods (16), which are evenly arranged at the center of each connecting frame (1301) and are on the same axis as the slot (1303).

9. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 3, characterized in that: There are 10 counterweights (1302), and the counterweights (1302) are thin sheets made of cast iron. The pull rope (1306) is inserted inside the round hole (1304). The scroll (1307) is rotatably connected to the outer surface of the second rotating roller (12). The diameter of the support plate (1305) is larger than the diameter of the round hole (1304).

10. The dynamic balancing testing device based on the gearbox of a wind turbine generator set according to claim 2, characterized in that: The snap-fit ​​block (1308) snaps into the inside of the snap-fit ​​hole, and the adjacent ends of the two electromagnets (1312) in the same group are opposite magnetic poles.

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