Wind driven generator with angle adjusting mechanism

Abstract

The invention belongs to the technical field of wind driven generators, and particularly relates to a wind driven generator with an angle adjusting mechanism, which comprises a generator cabin mounted at the top of a vertical rod, blades rotationally connected in a mounting part, and the mounting part rotationally connected to the end part of the generator cabin; the mounting part comprises an end socket, a base and a transmission shaft; the second spring is additionally arranged between the servo motor and the lifting plate, although larger pressure is caused to the torque of the servo motor, the hysteresis resistance torque in the servo motor can be broken through under the condition that the servo motor is shut down or powered off or breaks down, so that the lifting plate is rapidly driven to reset, the reset completion of the lifting plate is defined as a safety position, and the safety of the lifting plate is improved. And after the second spring drives the lifting plate to reset, through automatic control, the response time of equipment can be shortened, the response speed under the conditions of extreme weather and failure of the servo motor can be increased, and feathering of the blades can be ensured, so that the wind driven generator is prevented from being damaged or damaged.

Description

Technical Field

[0001] The invention belongs to the technical field of wind turbines, and particularly relates to a wind turbine with an angle adjustment mechanism. Background Art

[0002] The pitch control device of a wind turbine is one of its core components. Its main function is to adjust the blade angle to adapt to different wind speeds and directions, thereby optimizing the power generation efficiency and protecting the generator.

[0003] A Chinese patent with the publication number CN222363092U discloses a pitch control device for a wind turbine generator set, which includes a housing and a head. The head is fixedly connected to the housing. A bracket is arranged inside the housing, and the bracket is fixedly connected to the inner wall of the housing. Vertical plates are fixedly connected to the bracket at equal intervals, and adjustment grooves are formed inside the vertical plates. A driving mechanism is arranged on the bracket; the driving mechanism is used to drive the blade to rotate at an angle to achieve the pitch effect. The beneficial effect of the utility model is that the lifting plate can be driven to move through the driving mechanism, the bent rod is driven to move through the movement of the lifting plate, and the connecting rod is driven to move by the bent rod, so as to realize the pitch operation of the blade. Compared with the traditional device, the device has the characteristics of convenient operation and simple structure, and the overall structure is stable and reliable, not easy to fail, and can have a long service life.

[0004] In the above-mentioned prior art, a servo motor can be used to drive a multi-link mechanism to drive multiple blades to perform synchronous pitch adjustment. Compared with the synchronous pitch movement of the blades driven by a planetary gear set, a single lead screw, a lifting plate and a link mechanism are used to replace the traditional gearbox, the number of components is greatly reduced, and the mechanical complexity is reduced. However, when the servo motor fails or stops, if extreme weather conditions occur and the blades are not adjusted to the feather position, it will cause damage to the blades of the wind turbine. Therefore, relying on the servo motor to adjust the blade pitch, attention also needs to be paid to the emergency feathering action in case of accidents; Therefore, the present invention provides a wind turbine with an angle adjustment mechanism. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is: A wind turbine with an angle adjustment mechanism according to the present invention includes: A generator nacelle installed on the top of a vertical pole, and A mounting part rotatably connected to the end of the generator nacelle; A blade rotatably connected inside the mounting part; The installation part includes a head, a base and a transmission shaft; the head is fixedly connected to one side of the base, and the transmission shaft is fixedly connected to the center of the other side of the base; It further includes an adjusting part for adjusting the blade pitch; The adjusting part includes a servo motor, a ball screw, a lifting plate, a ball nut, a second spring and a transmission part; The output end of the servo motor is fixedly connected to the ball screw, and the ball nut is clamped and matched with the lifting plate; the ball screw is in threaded cooperation with the ball nut, and the ball screw penetrates through the lifting plate. The second spring is arranged between the servo motor and the lifting plate, and the second spring is sleeved outside the ball screw; the transmission part is used to convert the displacement of the lifting plate into the adjustment of the blade angle.

[0007] Preferably, the adjusting part further includes a support plate, a side plate and a support part; the support part is buckled with the side plate and fixedly connected to the base together, and the transmission part is arranged between the support part and the side plate; the support plate is fixedly connected to the top of the side plate; there are three combinations formed by the combination of the support part and the side plate, and they are arranged in a circumferential array corresponding to three groups of blades; the ball screw penetrates through the support plate, and the bottom of the ball screw is rotatably connected to one side of the base; both ends of the second spring are fixedly connected between the support plate and the lifting plate.

[0008] Preferably, the transmission part includes a connecting arm, a transmission rod and a swing arm; waist-shaped grooves and connecting holes are vertically and sequentially formed on the side plate; a connecting rod corresponding to the waist-shaped groove is fixedly connected to the side wall of the lifting plate, a connecting head is slidably connected in the waist-shaped groove, and the connecting rod penetrates through the waist-shaped groove and the connecting head; one end of the connecting arm is hinged to the connecting rod, and the other end of the connecting arm is hinged to the swing arm; one end of the swing arm is fixedly connected to the transmission rod, and the other end is hinged to the connecting arm; the transmission rod horizontally penetrates through the support part and the connecting hole in sequence.

[0009] Preferably, the side plate is arranged in an L-shaped structure, and symmetrically arranged embedding holes are formed at the bottom of the side plate. A convex part is arranged between the two embedding holes, and the convex part is welded to the side plate; an embedding plate is fixedly connected to one side of the support part, and the embedding plate is clamped and matched with the embedding hole; the swing arm is in abutting cooperation with the convex part.

[0010] Preferably, one end of the transmission rod penetrates through the support part and the connecting hole, and the other end is in plug-in cooperation with the blade.

[0011] Preferably, a relief hole is formed in the middle of the lifting plate, and the ball screw penetrates through the relief hole. The ball nut abuts against the top of the lifting plate and is arranged coaxially with the relief hole on the lifting plate; an emergency part is slidably connected in the lifting plate, and the ball nut is clamped and matched with the lifting plate through the emergency part.

[0012] Preferably, the emergency part includes a sliding rod, a support plate, a bent rod and a first spring; the sliding rod is slidably connected to the lifting plate, and the support plate is fixedly connected to one end of the sliding rod, the bent rod is fixedly connected to the other end of the sliding rod, and the bent rod is perpendicular to the sliding rod; the first spring is sleeved on the sliding rod, and both ends of the first spring are fixedly connected between the side wall of the lifting plate and the support plate; the bent rod is clamped and matched with the side wall of the ball nut.

[0013] Preferably, an access hole is formed in the side wall of the ball nut corresponding to the bent rod, a groove is further formed in the side wall of the ball nut adjacent to the access hole, an electromagnet is arranged in the groove, and the output shaft of the electromagnet penetrates through the side wall of the ball nut and extends into the access hole; A clamping groove is formed in the bent rod corresponding to the output shaft of the electromagnet; the clamping groove on the bent rod is clamped and matched with the output shaft of the electromagnet in the access hole.

[0014] Preferably, a limiting rod is further fixedly connected to the base; a through hole is formed in the lifting plate, and the limiting rod penetrates through the through hole.

[0015] Preferably, three connecting rods are arranged on the lifting plate, and corresponding to the three connecting parts, three groups of emergency parts are also arranged, and are arranged staggeredly with the connecting rods.

[0016] The beneficial effects of the present invention are as follows: 1. For the wind turbine with an angle adjustment mechanism of the present invention, by adding a second spring between the servo motor and the lifting plate, although it causes greater pressure on the torque of the servo motor, in the case of the servo motor stopping, power failure or malfunction, it can break through the hysteresis resistance torque in the servo motor, thereby quickly driving the lifting plate to reset. Defining the completion of the reset of the lifting plate as the safe position, then after the second spring drives the lifting plate to reset, through automatic control, the response time of the equipment can be reduced, and the response speed in extreme weather and the case of servo motor failure can be improved, ensuring that the blades are pitched, and the emergency safety problems in extreme weather and the case of servo motor failure can be dealt with, thereby avoiding damage or destruction of the wind turbine.

[0017] 2. For the wind turbine with an angle adjustment mechanism of the present invention, by setting the servo motor and the electromagnet to share the same safety circuit power supply, when the servo motor fails, the safety relay will cut off the power supply, so that the servo motor and the electromagnet lose power synchronously. After the electromagnet loses power, the output shaft of the electromagnet retracts. At this time, under the action of the first spring, the sliding rod can be pulled to slide outwards, so that the bent rod moves outwards synchronously with the sliding rod. Under the elastic force of the second spring, the lifting plate is separated from the ball nut and quickly resets, thus completing the pitching action in abnormal working conditions and extreme weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 is a perspective view of the present invention; Figure 2 is a partial perspective view of the present invention; Figure 3 is a perspective view of the adjustment part in the present invention; Figure 4 is an exploded view of the adjustment part in the present invention; Figure 5 is a top view of the adjustment part of the present invention; Figure 6 is an assembly view of the support part and the side plate in the present invention; Figure 7 is an assembly view of the ball nut and the lifting plate in the present invention; In the figure: 1, vertical rod; 2, generator cabin; 3, installation part; 31, head; 32, base; 321, limit rod; 33, transmission shaft; 4, blade; 5, adjustment part; 50, servo motor; 51, support plate; 52, side plate; 521, waist-shaped groove; 522, connecting arm; 523, connecting head; 524, protruding part; 525, connecting hole; 526, embedding hole; 53, support part; 531, embedding plate; 54, transmission rod; 541, swing arm; 55, ball screw; 56, lifting plate; 561, connecting rod; 562, relief hole; 563, through hole; 57, emergency part; 571, support plate; 572, sliding rod; 573, first spring; 574, bent rod; 575, clamping groove; 58, ball nut; 581, groove; 582, access hole; 583, electromagnet; 59, second spring. Detailed implementation manners

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0021] As Figures 1 to 4 shown, a wind turbine with an angle adjustment mechanism according to an embodiment of the present invention includes a generator cabin 2 installed at the top of a vertical rod 1, a blade 4 rotatably connected in an installation part 3, and an installation part 3 rotatably connected to the end of the generator cabin 2; the installation part 3 includes a head 31, a base 32 and a transmission shaft 33; the head 31 is fixedly connected to one side of the base 32, and the transmission shaft 33 is fixedly connected to the center of the other side of the base 32; It further includes an adjusting part 5 for adjusting the pitch of the blade 4; the adjusting part 5 includes a servo motor 50, a ball screw 55, a lifting plate 56, a ball nut 58, a second spring 59 and a transmission part; the output end of the servo motor 50 is fixedly connected to the ball screw 55, and the ball nut 58 is clamped and matched with the lifting plate 56; the ball screw 55 is in threaded fit with the ball nut 58, and the ball screw 55 penetrates through the lifting plate 56, the second spring 59 is arranged between the servo motor 50 and the lifting plate 56, and the second spring 59 is sleeved outside the ball screw 55; the transmission part is used for converting the displacement of the lifting plate 56 into the angle adjustment of the blade 4.

[0022] In the above prior art, a multi-link mechanism can be driven by a servo motor to drive multiple blades to perform pitch adjustment synchronously. Compared with the synchronous pitch adjustment action of the blades driven by a planetary gear set, a single screw rod, a lifting plate and a link mechanism are used to replace the traditional gearbox, the number of parts is greatly reduced, and the mechanical complexity is reduced. However, when the servo motor fails or stops, if there are extreme weather conditions and the blades are not adjusted to the feather position, it will cause damage to the blades of the wind turbine. Therefore, relying on the servo motor to adjust the blade pitch, attention also needs to be paid to the emergency feathering action in case of accidents. In one embodiment, compared with the prior art, a second spring 59 is added between the servo motor 50 and the lifting plate 56. Under normal operating conditions of the servo motor 50 and normal environment, the servo motor 50 drives the ball screw 55 to rotate, and the lifting plate 56 is driven to move through the ball nut 58. After the lifting plate 56 moves, the displacement can be converted into the angle of the blade 4 to be adjusted through the transmission part, that is, when the lifting plate 56 moves, the corresponding rotational adjustment angle of the blade 4 is generated. In this embodiment, when the lifting plate 56 moves, three transmission parts are synchronously driven to start, so as to synchronously adjust the pitch of the three blades 4; in addition, a second spring 59 is added in this embodiment. Under abnormal operating conditions and abnormal environment, such as strong wind weather, when the sensor monitors that the wind speed exceeds the theoretical value, the generator may be overloaded or the resistance of the blade 4 is too large and damaged. At this time, the blade 4 needs to be adjusted to the feather position. However, due to the failure of the servo motor 50, it cannot respond. In one embodiment, when the above situation occurs, in the case of the failure of the servo motor 50, the rotor electromagnetic field fails, and the elastic force of the second spring 59 can drive the lifting plate 56 to quickly reset, so that the blade 4 is feathered to cope with extreme working conditions and the failure of the servo motor 50. It should be noted that in the above description, when the lifting plate 56 is reset, the elastic force of the second spring 59 is the smallest. When the lifting plate 56 starts to move through the cooperation of the ball nut 58 and the ball screw 55, the second spring 59 will be compressed, thereby generating stored energy. However, when the servo motor 50 is operating normally, real-time torque control can be performed. When controlling the rotation of the ball screw 55, it can also resist the elastic force of the second spring 59 and maintain the position of the lifting plate 56 unchanged. However, after the servo motor 50 fails, loses power or malfunctions, the rotor electromagnetic field fails and can no longer resist the elastic force of the second spring 59. At this time, the second spring 59 quickly drives the lifting plate 56 to reset by relying on its elastic force; Based on the above, in an embodiment, by adding a second spring 59 between the servo motor 50 and the lifting plate 56, although it causes greater pressure on the torque of the servo motor 50, in the case of the servo motor 50 stopping, losing power or malfunctioning, it can break through the hysteresis resistance torque in the servo motor 50, thereby quickly driving the lifting plate 56 to reset. Defining the completion of the reset of the lifting plate 56 as the safe position, after the second spring 59 drives the lifting plate 56 to reset, through automated control, the response time of the device can be reduced, and the response speed in extreme weather and in the case of the servo motor 50 failure can be improved, ensuring that the blade 4 is feathered, and being able to handle the emergency safety problems in extreme weather and in the case of the servo motor 50 failure, thereby avoiding damage or destruction of the wind turbine.

[0023] As Figures 1 to 6 shown, the adjusting part 5 further includes a support plate 51, a side plate 52 and a support part 53; the support part 53 is buckled with the side plate 52 and fixedly connected to the base 32, and the transmission part is arranged between the support part 53 and the side plate 52; the support plate 51 is fixedly connected to the top of the side plate 52; three combinations formed by the combination of the support part 53 and the side plate 52 are provided and arranged in a circumferential array corresponding to three groups of blades 4; the ball screw 55 passes through the support plate 51, and the bottom of the ball screw 55 is rotatably connected to one side of the base 32; both ends of the second spring 59 are fixedly connected between the support plate 51 and the lifting plate 56.

[0024] As described above, in the normal operating condition of the servo motor 50, in an embodiment, the specific action of the blade 4 pitching is as follows: The servo motor 50 is started to drive the ball screw 55 to rotate. The bottom of the ball screw 55 is supported and limited by the base 32. The rotation of the ball screw 55 cooperates with the ball nut 58, and the ball nut 58 is used to drive the lifting plate 56 to displace. When the lifting plate 56 is displaced, it can drive the transmission part to deform. When the transmission part deforms, the pitch change of the blade 4 can be completed. In this embodiment, the support plate 51 is used to support the servo motor 50, and the side plate 52 is used to ensure the stability of the adjustment part 5 during operation, and at the same time provide support and limitation for the deformation of the transmission part. In addition, the support part 53 is used to cooperate with the side plate 52 to ensure the stability of the transmission part during deformation. Based on the above, through the setting of the adjustment part 5, the stability and controllability of the synchronous pitch change of multiple blades 4 driven by the servo motor 50 are guaranteed.

[0025] As Figures 1 to 6 shown, the transmission part includes a connecting arm 522, a transmission rod 54 and a swing arm 541; oval slots 521 and connecting holes 525 are vertically and sequentially formed on the side plate 52; a connecting rod 561 corresponding to the oval slot 521 is fixedly connected to the side wall of the lifting plate 56, a connecting head 523 is slidably connected in the oval slot 521, and the connecting rod 561 penetrates through the oval slot 521 and the connecting head 523; one end of the connecting arm 522 is hinged to the connecting rod 561, and the other end of the connecting arm 522 is hinged to the swing arm 541; one end of the swing arm 541 is fixedly connected to the transmission rod 54, and the other end is hinged to the connecting arm 522; the transmission rod 54 horizontally penetrates through the support part 53 and the connecting hole 525 in sequence.

[0026] As described above, when the lifting plate 56 is driven by the ball nut 58 to displace, the connecting rod 561 on the side wall of the lifting plate 56 is used to drive one end of the connecting head 523 and the connecting arm 522 to slide in the oval slot 521. Since the size of the connecting arm 522 is fixed, during the process of the connecting arm 522 being driven by the connecting rod 561, the swing arm 541 will also be synchronously driven to rotate. It should be noted that the swing arm 541 is fixedly connected to the transmission rod 54, and the transmission rod 54 penetrates through the support part 53 and the connecting hole 525 in sequence. Therefore, the transmission rod 54 can only perform a rotational movement with a fixed axis. When the swing arm 541 is driven by the displaced connecting arm 522, it can only drive the transmission rod 54 to perform a rotational movement with a fixed axis. After the transmission rod 54 performs a rotational movement with a fixed axis, the plug-in and cooperation relationship between the transmission rod 54 and the blade 4 can be used to drive the blade 4 to rotate with a fixed axis, so as to complete the pitch change. It should also be noted that in the above embodiment, the rotation of the blade 4 with a fixed axis mainly depends on the cooperation of the connecting rod 561 on the side wall of the lifting plate 56 and the transmission part. Therefore, when the lifting plate 56 is horizontally displaced, the three connecting rods 561 can synchronously drive the three groups of transmission parts to synchronously deform, so that the three blades 4 perform synchronous pitch change actions.

[0027] As Figures 1 to 6As shown, the side plate 52 is arranged in an L-shaped structure, and symmetrically arranged embedding holes 526 are provided at the bottom of the side plate 52. A convex portion 524 is provided between the two embedding holes 526, and the convex portion 524 is welded to the side plate 52; an embedding plate 531 is fixedly connected to one side of the support portion 53, and the embedding plate 531 is in snap-fit with the embedding hole 526; the swing arm 541 is in abutting fit with the convex portion 524.

[0028] In one embodiment, the side plate 52 is in snap-fit with the support portion 53, and the embedding plate 531 provided on the support portion 53 is provided with preset screw holes, and it can be directly connected to the base 32 tightly with screws, so as to ensure the fixation of the support portion 53, the side plate 52 and the base 32. In addition, the convex portion 524 provided on the side plate 52 can be in abutting fit with the swing arm 541. Specifically, the rotation angle of the blade 4 is limited. When the rotation angle is too large, it may cause damage to the cable by stretching. Therefore, it is also necessary to limit the rotation angle of the blade 4. In this embodiment, by using the abutting of the convex portion 524 and the swing arm 541, the swing arm 541 can be limited, so that the swing arm 541 can only rotate within a certain angle.

[0029] As Figures 1 to 6 shown, one end of the transmission rod 54 penetrates through the support portion 53 and the connecting hole 525, and the other end is in plug-in fit with the blade 4.

[0030] As Figures 1 to 7 shown, a relief hole 562 is provided in the middle of the lifting plate 56, and the ball screw 55 penetrates through the relief hole 562. The ball nut 58 abuts against the top of the lifting plate 56 and is arranged coaxially with the relief hole 562 on the lifting plate 56; an emergency portion 57 is slidably connected in the lifting plate 56, and the ball nut 58 and the lifting plate 56 are in snap-fit through the emergency portion 57.

[0031] In one embodiment, the ball nut 58 and the lifting plate 56 are in a snap-fit relationship. The ball screw 55 penetrates through the ball nut 58 and also penetrates through the relief hole 562 in the middle of the lifting plate 56. It should be noted that the ball screw 55 is in threaded fit with the ball nut 58, and the ball screw 55 passes through the relief hole 562. The size of the relief hole 562 is larger than the outer diameter of the ball screw 55. When the lifting plate 56 quickly resets under the action of the second spring 59, the emergency portion 57 can separate the ball nut 58 from the lifting plate 56. At this time, the second spring 59 squeezes the lifting plate 56, so that the lifting plate 56 can quickly reset to a safe position without contacting the ball screw 55, thereby completing the rapid emergency action under abnormal working conditions and extreme weather conditions and avoiding damage to the wind turbine.

[0032] As Figures 1 to 7As shown, the emergency department 57 includes a sliding rod 572, a support plate 571, a bent rod 574 and a first spring 573; the sliding rod 572 is slidably connected to the lifting plate 56, and the support plate 571 is fixedly connected to one end of the sliding rod 572, and the bent rod 574 is fixedly connected to the other end of the sliding rod 572, and the bent rod 574 is perpendicularly arranged with the sliding rod 572; the first spring 573 is sleeved on the sliding rod 572, and both ends of the first spring 573 are fixedly connected between the side wall of the lifting plate 56 and the support plate 571; the bent rod 574 is in snap-fit connection with the side wall of the ball nut 58.

[0033] As Figures 1 to 7 shown, an access hole 582 is formed in the side wall of the ball nut 58 corresponding to the bent rod 574, a groove 581 is further formed in the side wall of the ball nut 58 adjacent to the access hole 582, an electromagnet 583 is arranged in the groove 581, and the output shaft of the electromagnet 583 penetrates through the side wall of the ball nut 58 and extends into the access hole 582; a clamping groove 575 is formed in the bent rod 574 corresponding to the output shaft of the electromagnet 583; the clamping groove 575 on the bent rod 574 is in snap-fit connection with the output shaft of the electromagnet 583 in the access hole 582.

[0034] According to the above, in abnormal working conditions and extreme weather conditions, at this time, the servo motor 50 is in a fault state. Since the preset condition is that all electronic control devices share the same safety circuit power supply, that is, the servo motor 50 and the electromagnet 583 share the same safety circuit power supply. Therefore, when the servo motor 50 fails, the safety relay will cut off the power supply, so that the servo motor 50 and the electromagnet 583 lose power synchronously. After the electromagnet 583 loses power, the output shaft of the electromagnet 583 retracts. At this time, under the action of the first spring 573, the sliding rod 572 can be pulled to slide outwards, so that the bent rod 574 moves outwards synchronously with the sliding rod 572. Under the elastic force of the second spring 59, the lifting plate 56 is separated from the ball nut 58 and quickly resets, thus completing the pitch control action in abnormal working conditions and extreme weather conditions; In addition, it should also be noted that the electromagnet 583 is preset to extend the output end when powered on and retract when powered off in one embodiment. According to the specific implementation situation, the electromagnet 583 can also be preset to retract the output end when powered on and pop out when powered off. Only the cooperation mode between the bent rod 574 and the access hole 582 needs to be changed, and no more details will be described here.

[0035] As Figures 1 to 4 shown, a limiting rod 321 is further fixedly connected to the base 32; a through hole 563 is formed in the lifting plate 56, and the limiting rod 321 penetrates through the through hole 563.

[0036] As Figures 1 to 7As shown, three connecting rods 561 are arranged on the lifting plate 56 and correspond to three connecting parts. Three groups of emergency parts 57 are also arranged and are staggered with the connecting rods 561.

[0037] Working principle: A second spring 59 is added between the servo motor 50 and the lifting plate 56. Under normal operating conditions of the servo motor 50 and normal environment, the servo motor 50 drives the ball screw 55 to rotate, and drives the lifting plate 56 to move through the ball nut 58. When the lifting plate 56 moves, the displacement can be converted into the angle of the blade 4 to be adjusted through the transmission part, that is, when the lifting plate 56 moves, the rotation angle of the blade 4 is correspondingly generated. In this embodiment, when the lifting plate 56 moves, three transmission parts are synchronously driven to start, so as to synchronously adjust the pitch of the three blades 4; in addition, a second spring 59 is added in this embodiment. Under abnormal operating conditions and abnormal environment, such as strong wind weather, when the sensor monitors that the wind speed exceeds the theoretical value, the generator may be overloaded or the resistance of the blade 4 is too large and damaged. At this time, it is necessary to adjust the blade 4 to feather. However, due to the failure of the servo motor 50, it cannot respond. In one embodiment, when the above situation occurs, in the case of the failure of the servo motor 50, the rotor electromagnetic field fails, and the elastic force of the second spring 59 can drive the lifting plate 56 to quickly reset, so that the blade 4 feathers to cope with extreme working conditions and the failure of the servo motor 50; It should be noted that in the above description, when the lifting plate 56 is reset, the elastic force of the second spring 59 is the smallest. When the lifting plate 56 starts to move through the cooperation of the ball nut 58 and the ball screw 55, the second spring 59 will be compressed, thus generating stored energy. However, when the servo motor 50 is running normally, real-time torque control can be performed. When controlling the rotation of the ball screw 55, it can also resist the elastic force of the second spring 59 and maintain the position of the lifting plate 56 unchanged. However, after the servo motor 50 fails, loses power or malfunctions, the rotor electromagnetic field fails and can no longer resist the elastic force of the second spring 59. At this time, the second spring 59 quickly drives the lifting plate 56 to reset by relying on the elastic force; Based on the above, in one embodiment, by adding a second spring 59 between the servo motor 50 and the lifting plate 56, although it causes greater pressure on the torque of the servo motor 50, in the case of the servo motor 50 shutting down, losing power or malfunctioning, it can break through the hysteresis resistance torque in the servo motor 50, thereby quickly driving the lifting plate 56 to reset. Defining the completion of the reset of the lifting plate 56 as the safe position, after the second spring 59 drives the lifting plate 56 to reset, through automated control, it can reduce the equipment response time and improve the response speed in extreme weather and the case of the servo motor 50 failing, ensuring that the blade 4 is feathered, and being able to handle the emergency safety issues in extreme weather and the case of the servo motor 50 failing, thereby avoiding damage or destruction of the wind turbine; The specific action of the blade 4 pitching is as follows: The servo motor 50 starts to drive the ball screw 55 to rotate. The bottom of the ball screw 55 is supported and limited by the base 32. The rotation of the ball screw 55 cooperates with the ball nut 58, and the ball nut 58 is used to drive the lifting plate 56 to displace. When the lifting plate 56 displaces, it can drive the transmission part to deform, and when the transmission part deforms, the pitching of the blade 4 can be completed. In this embodiment, the support plate 51 is used to support the servo motor 50, the side plate 52 is used to ensure the stability of the adjustment part 5 during operation, and at the same time provides support and limitation for the deformation of the transmission part. In addition, the support part 53 is used to cooperate with the side plate 52 to ensure the stability of the transmission part during deformation. Based on the above, through the setting of the adjustment part 5, the stability and controllability of the synchronous pitching of multiple blades 4 driven by the servo motor 50 are guaranteed.

[0038] In abnormal working conditions and extreme weather conditions, at this time the servo motor 50 is in a faulty state. Since the preset condition is that all electrical control devices share the same safety circuit power supply, that is, the servo motor 50 and the electromagnet 583 share the same safety circuit power supply. Therefore, when the servo motor 50 fails, the safety relay will cut off the power supply, causing the servo motor 50 and the electromagnet 583 to lose power synchronously. After the electromagnet 583 loses power, the output shaft of the electromagnet 583 retracts. At this time, under the action of the first spring 573, the slide bar 572 can be pulled to slide outwards, causing the bent bar 574 to move outwards synchronously with the slide bar 572. Under the elastic force of the second spring 59, after the lifting plate 56 is separated from the ball nut 58, it quickly resets, thus completing the feathering action in abnormal working conditions and extreme weather conditions; In addition, it should also be noted that in one embodiment, the electromagnet 583 is preset to extend the output end when powered on and retract when powered off. According to the specific implementation situation, the electromagnet 583 can also be preset to retract the output end when powered on and pop out when powered off, only by changing the cooperation mode between the bent bar 574 and the access hole 582, and details will not be elaborated here.

[0039] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind turbine with an angle adjustment mechanism, characterized in that: Comprising: A generator cabin (2) installed at the top of a vertical pole (1), and A mounting part (3) rotatably connected to the end of the generator cabin (2); A blade (4) rotatably connected within the mounting part (3); The mounting part (3) includes a head (31), a base (32), and a transmission shaft (33); the head (31) is fixedly connected to one side of the base (32), and the transmission shaft (33) is fixedly connected to the center of the other side of the base (32); It further includes an adjusting part (5) for adjusting the pitch of the blade (4); The adjusting part (5) includes a servo motor (50), a ball screw (55), a lifting plate (56), a ball nut (58), a second spring (59), and a transmission part; The output end of the servo motor (50) is fixedly connected to the ball screw (55), and the ball nut (58) is snap-fitted with the lifting plate (56); the ball screw (55) is in threaded engagement with the ball nut (58), and the ball screw (55) penetrates through the lifting plate (56). The second spring (59) is disposed between the servo motor (50) and the lifting plate (56), and the second spring (59) is sleeved outside the ball screw (55); the transmission part is used to convert the displacement of the lifting plate (56) into the angle adjustment of the blade (4).

2. The wind turbine with an angle adjustment mechanism according to claim 1, characterized in that: The adjusting part (5) further includes a support plate (51), a side plate (52), and a support part (53); the support part (53) is snap-connected to the side plate (52) and integrally fixed to the base (32), and the transmission part is disposed between the support part (53) and the side plate (52); the support plate (51) is fixedly connected to the top of the side plate (52); there are three combined bodies formed by the combination of the support part (53) and the side plate (52), and they are arranged in a circumferential array corresponding to three groups of blades (4); the ball screw (55) penetrates through the support plate (51), and the bottom of the ball screw (55) is rotatably connected to one side of the base (32); both ends of the second spring (59) are fixedly connected between the support plate (51) and the lifting plate (56).

3. The wind turbine with an angle adjustment mechanism according to claim 2, wherein: The transmission part includes a connecting arm (522), a transmission rod (54), and a swing arm (541); vertically and sequentially formed on the side plate (52) are an oval slot (521) and a connecting hole (525); a connecting rod (561) corresponding to the oval slot (521) is fixedly connected to the side wall of the lifting plate (56), a connecting head (523) is slidably connected within the oval slot (521), and the connecting rod (561) penetrates through the oval slot (521) and the connecting head (523); one end of the connecting arm (522) is hinged to the connecting rod (561), and the other end of the connecting arm (522) is hinged to the swing arm (541); one end of the swing arm (541) is fixedly connected to the transmission rod (54), and the other end is hinged to the connecting arm (522); the transmission rod (54) horizontally penetrates through the support part (53) and the connecting hole (525).

4. A wind turbine having an angle adjustment mechanism according to claim 3, wherein: The side plate (52) is arranged in an L-shaped structure, and symmetrically arranged embedding holes (526) are formed at the bottom of the side plate (52). A convex portion (524) is arranged between the two embedding holes (526), and the convex portion (524) is welded to the side plate (52); One side of the support portion (53) is fixedly connected with an embedding plate (531), and the embedding plate (531) is in snap-fit with the embedding hole (526); The swing arm (541) is in abutting fit with the convex portion (524).

5. A wind turbine with an angle adjustment mechanism according to claim 4, characterized in that: One end of the transmission rod (54) penetrates through the support portion (53) and the connection hole (525), and the other end is in plug-in fit with the blade (4).

6. A wind turbine with an angle adjustment mechanism according to claim 5, characterized in that: A relief hole (562) is formed in the middle of the lifting plate (56), and the ball screw (55) penetrates through the relief hole (562). The ball nut (58) abuts against the top of the lifting plate (56) and is arranged coaxially with the relief hole (562) on the lifting plate (56); An emergency portion (57) is slidably connected in the lifting plate (56), and the ball nut (58) is in snap-fit with the lifting plate (56) through the emergency portion (57).

7. The wind turbine with an angle adjustment mechanism according to claim 6, wherein: The emergency portion (57) includes a slide rod (572), a support plate (571), a bent rod (574) and a first spring (573); The slide rod (572) is slidably connected to the lifting plate (56), and the support plate (571) is fixedly connected to one end of the slide rod (572). The bent rod (574) is fixedly connected to the other end of the slide rod (572), and the bent rod (574) is perpendicular to the slide rod (572); The first spring (573) is sleeved on the slide rod (572), and both ends of the first spring (573) are fixedly connected between the side wall of the lifting plate (56) and the support plate (571); The bent rod (574) is in snap-fit with the side wall of the ball nut (58).

8. The wind turbine with an angle adjustment mechanism according to claim 7, wherein: An access hole (582) corresponding to the bent rod (574) is formed in the side wall of the ball nut (58). A groove (581) is also formed in the side wall of the ball nut (58) adjacent to the access hole (582). An electromagnet (583) is arranged in the groove (581), and the output shaft of the electromagnet (583) penetrates through the side wall of the ball nut (58) and extends into the access hole (582); A card slot (575) corresponding to the output shaft of the electromagnet (583) is formed in the bent rod (574); The card slot (575) on the bent rod (574) is in snap-fit with the output shaft of the electromagnet (583) in the access hole (582).

9. A wind turbine with an angle adjustment mechanism according to claim 8, characterized in that: A limiting rod (321) is also fixedly connected to the base (32); A through hole (563) is formed in the lifting plate (56), and the limiting rod (321) penetrates through the through hole (563).

10. A wind turbine with an angle adjustment mechanism according to claim 9, characterized in that: Three connecting rods (561) are arranged on the lifting plate (56). Corresponding to the three connecting parts, three groups of the emergency portions (57) are also arranged and are arranged staggeredly with the connecting rods (561).

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