A wind turbine generator set transmission main tooth replacement device

Abstract

The application relates to the technical field of wind power transmission structures, in particular to a wind turbine generator set transmission main tooth replacement device which comprises a base disc, a rotating disc rotatably arranged on the base disc, a plurality of fixing seats distributed in the circumferential direction of the rotating disc, a plurality of moving frames slidingly arranged on the fixing seats along the axis direction of the base disc and an output shaft for power output; the damaged main tooth body in the wind turbine generator set can be automatically and quickly replaced, so that the equipment can be restored to the normal working state in a short time, the electric energy loss caused by long-time shutdown of the equipment can be avoided, timely maintenance and replacement of the main tooth body when the main tooth body is damaged are not needed, the urgency of the maintenance work is reduced, the technical requirements and work pressure on the maintenance personnel are reduced, and the maintenance mode can be greatly simplified after part of the main tooth bodies are damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power transmission structure, and particularly relates to a wind turbine generator system transmission main tooth replacement device. BACKGROUND

[0002] As a core pillar of clean and renewable energy, the installed capacity of wind power generation continues to grow rapidly worldwide. The main gear box, as the core hub of energy conversion, plays a key role in converting the low-speed and high-torque mechanical energy captured by the impeller into the high-speed required by the generator.

[0003] Due to the fact that wind farms are often located in remote, high humidity, high salt fog or large temperature difference natural environments (such as offshore, plateau, and gobi), combined with the frequent changes of wind speed and direction, the main teeth on the main gear box, which are meshed and connected with the output tooth disc of the impeller, are frequently subjected to load impact, and there is a risk of wear, tooth breakage, pitting, and fracture. Once a failure occurs, not only will it cause a loss of electric energy, but also due to its location in the 80-150 meter high hub space, it is difficult to replace, and during replacement, the impeller needs to be stopped to facilitate the disassembly of the main tooth, which undoubtedly increases the difficulty of replacement, resulting in extremely inconvenient operation. Moreover, from the time the worker receives the maintenance task to the time the worker prepares the materials and arrives at the scene, to the time the worker climbs into the wind turbine for maintenance, and until the completion of the main tooth replacement, the entire process takes a long time, resulting in a long time of equipment downtime. SUMMARY

[0004] The present application provides a wind turbine generator system transmission main tooth replacement device, which can effectively solve the problems in the background art.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] A wind turbine generator system transmission main tooth replacement device, comprising a base disc, a rotating disc rotatably arranged on the base disc, a plurality of fixed seats distributed circumferentially around the rotating disc, a plurality of moving frames slidably installed on each fixed seat along the axis direction of the base disc, and an output shaft for power output, each moving frame is rotatably provided with a transmission shaft, and each transmission shaft is provided with a main tooth body at one end.

[0007] Among them, the output shaft is fixed relative to the base disc, and the other end of each transmission shaft is provided with a transmission part for alternating transmission connection with the output shaft, and each fixed seat is provided with a positioning part for positioning the transmission shaft in an idle state.

[0008] In some embodiments of the present invention, the transmission part includes a wheel body that is connected to the corresponding transmission shaft. The end face of the wheel body is provided with an arc groove, the center of which coincides with the rotation axis of the turntable. The output shaft is provided with a filler body that cooperates with the arc groove.

[0009] In some embodiments of the present invention, the positioning part includes an extrusion body mounted on the fixed base and a positioning wheel eccentrically mounted on the transmission shaft, wherein the extrusion body is used to provide extrusion force to the outer wall of the positioning wheel.

[0010] In some embodiments of the present invention, slopes are provided between the two end faces of the positioning wheel and the drive shaft.

[0011] In some embodiments of the present invention, the position where the distance between the positioning wheel and the axis of the transmission shaft is the smallest is set as a plane.

[0012] In some embodiments of the present invention, the extrusion body is a plurality of rollers rotatably mounted on the fixed base, and the plurality of rollers are arranged in a vertical trapezoidal shape, the vertical surface of the trapezoid being used to abut against the plane.

[0013] In some embodiments of the present invention, a limiting part for guiding and limiting the output shaft is provided between two adjacent transmission shafts.

[0014] In some embodiments of the present invention, the filler is provided with an arc groove II, and the center of the arc groove II coincides with the rotation axis of the turntable;

[0015] The limiting part includes an arc rod that is concentric with the second arc groove and is used in conjunction with the second arc groove;

[0016] Among them, the second arc groove is used in conjunction with at least one of the arc rod and the first arc groove and the filler.

[0017] In some embodiments of the present invention, a base column is provided at the bottom of the base disk, a collar is rotatably provided on the base column, a plurality of support arms corresponding to the number of transmission shafts are provided on the collar, a prism is rotatably provided on the support arm, the prism is connected to the corresponding wheel body for transmission, and the end of the prism is slidably inserted into the corresponding transmission shaft.

[0018] In some embodiments of the present invention, the base column is provided with a power unit for providing power for the movement of each of the movable frames on the fixed base. The power unit includes a motor fixed relative to the base column, and the output end of the motor is provided with a helical gear column.

[0019] Each of the movable frames is provided with a helical toothed groove, which is used in conjunction with the helical toothed column. The cross-section of the helical toothed groove is arc-shaped, and the center of the arc coincides with the rotation axis of the turntable.

[0020] The technical solution of this invention can achieve the following technical effects:

[0021] By automatically and quickly replacing damaged main gears in wind turbine generators, the equipment can be restored to normal operation in a short time, avoiding power loss caused by prolonged downtime. Furthermore, it eliminates the need for immediate repair and replacement of damaged main gears, reducing the urgency of maintenance work and thus lowering the technical requirements and workload for maintenance personnel. Only repairing a portion of the main gears at a time greatly simplifies the maintenance process and avoids the physical strain of workers frequently climbing the turbine tower. Since workers only need to replace the main gears not connected to the transmission system, the operation is more convenient and allows the wind turbine to continue operating normally. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the main tooth body and its structure in an embodiment of the present invention;

[0025] Figure 3 yes Figure 2 A structural diagram from another perspective;

[0026] Figure 4 This is a schematic diagram of the base disk structure in an embodiment of the present invention;

[0027] Figure 5 This is an exploded structural diagram of the wheel body and output shaft in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the transmission shaft in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the fixing base in an embodiment of the present invention.

[0030] Figure label:

[0031] 100. Base plate; 101. Turntable; 102. Fixed seat; 103. Moving frame; 104. Drive shaft; 105. Main gear body; 106. Wheel body; 107. Arc groove one; 108. Filler; 109. Positioning wheel; 110. Slope; 111. Plane; 112. Roller; 113. Arc groove two; 114. Arc rod; 115. Collar; 116. Support arm; 117. Prism shaft; 118. Limiting body; 119. Elastic body; 120. Base column;

[0032] 200. Output shaft;

[0033] 300. Motor 1; 301. Helical gear column; 302. Helical gear groove;

[0034] 400. Motor 2; 401. Transmission wheel;

[0035] 500, Fixed frame; 501, Electromagnetic actuator; 502, Moving plate; 503, Insert. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] like Figures 1 to 4 As shown, a wind turbine generator transmission main gear replacement device of the present invention includes a base plate 100, a turntable 101 rotatably disposed on the base plate 100, a plurality of fixed seats 102 distributed circumferentially around the turntable 101, a plurality of movable frames 103 slidably mounted on each fixed seat 102 along the axial direction of the base plate 100, and an output shaft 200 for power output. Each movable frame 103 is rotatably disposed with a transmission shaft 104, and one end of each transmission shaft 104 is provided with a main gear body 105.

[0039] The output shaft 200 is fixed relative to the base plate 100. Each transmission shaft 104 has a transmission part at the other end for alternating transmission connection with the output shaft 200. Each fixed seat 102 has a positioning part for positioning the transmission shaft 104 in the idle state.

[0040] In this invention, the base plate 100 is mainly used to support the turntable 101, thereby supporting each fixed seat 102 and its structure. The turntable 101 rotates on the base plate 100, thereby driving several main gear bodies 105 to rotate on the base plate 100, facilitating the repositioning of the main gear bodies 105. Since the installation direction of the main gears is different in different fans, the rotation axis of the turntable 101 can be horizontal, vertical, or inclined. Taking a vertical rotation axis of the turntable 101 as an example, ... Figure 4 As shown, the turntable 101 is rotatably mounted on the outer circumference of the base plate 100. The turntable 101 can achieve a rotatable connection with the base plate 100 through any structure such as a snap ring, bolt, or bearing. Several fixed seats 102 are distributed around the circumference of the base plate 100, and the fixed seats 102 can be used to support and guide the movable frame 103, so that the movable frame 103 can move along the rotation axis of the turntable 101, that is, the movable frame 103 moves along the axis of the base plate 100. Of course, the movable frame 103 can also move in an inclined direction on the fixed seat 102. This movement method is mainly used in conjunction with the inclined direction of the teeth on the main gear body 105. The transmission shaft 104 can be used to transmit power to the main gear body 105, so that when the main gear body 105 rotates, the main gear body 105 drives the output shaft 200 to rotate through the transmission part, and the output shaft 200 transmits power to the external gearbox.

[0041] Since the output shaft 200 serves as the power output end, the transmission shaft 104 moved to the position of the output shaft 200 can achieve transmission with the output shaft 200. That is, the main gear body 105 at this position is the power input end, and the main gear body 105 at other positions is used as a spare. Since the main gear body 105 is used in conjunction with the output gear disk of the external fan impeller, when the main gear body 105 is replaced, it can be moved along the radial direction of the output gear disk or along the inclined direction of the upper teeth of the main gear body 105, thereby achieving smooth tooth disengagement. When 105 is reset, it also needs to move in the above direction to achieve smooth meshing between the main tooth body 105 and the output tooth disk. In some embodiments, when the main tooth body 105 is reset, the teeth on the main tooth body 105 may interfere with or push against the teeth on the output tooth disk, causing the teeth on the main tooth body 105 to fail to enter the corresponding tooth grooves on the output tooth disk normally. That is, the main tooth body 105 cannot mesh normally with the output tooth disk. In this case, the teeth on the main tooth body 105 and the teeth on the output tooth disk can be set to be conical, arc-shaped or other tooth shapes that are easy to slide relative to each other.

[0042] In actual use, the main gear body 105 corresponding to the output shaft 200 is located away from the output shaft 200. At this time, the main gear body 105 meshes with the output gear disk on the fan impeller. When the main gear body 105 is damaged, the movable frame 103 on the main gear body 105 slides on the fixed seat 102, and the main gear body 105 is successfully separated from the output gear disk. The rotating turntable 101 is rotated to change the position of several main gear bodies 105, so that the intact main gear body 105 moves to the position corresponding to the output shaft 200. At this time, the main gear body 105 and the output shaft 200 are connected by transmission through the transmission part. The movable frame 103 on it slides on the fixed seat 102, so that the main gear body 105 moves to the position where it meshes with the output gear disk, thereby completing the replacement of the main gear body 105. The rotational power of the main gear body 105 is output to the external gearbox through the transmission shaft 104 and the output shaft 200.

[0043] It should be noted that since the main gear body 105 can rotate freely with the transmission shaft 104 when idle, the transmission part between the transmission shaft 104 and the output shaft 200 is not easy to connect. It is necessary to limit the position of the transmission shaft 104 so that it cannot rotate freely, so as to facilitate the connection of the transmission part. Here, the transmission shaft 104 and the main gear body 105 are positioned by the positioning part. The specific positioning method can be extrusion positioning, friction positioning, insertion positioning, etc. The idle state of the main gear body 105 includes the state when it is separated from the output gear plate and the state when several main gear bodies 105 are swapped.

[0044] By automatically and quickly replacing the damaged main gear body 105 in the wind turbine generator set, the equipment can be restored to normal operation in a short time, avoiding power loss caused by prolonged downtime. Furthermore, it eliminates the need for timely repair and replacement of the main gear body 105 when it is damaged, reducing the urgency of maintenance work and thus lowering the technical requirements and workload for maintenance personnel. Performing a one-time repair after partial damage to several main gear bodies 105 greatly simplifies the maintenance process and avoids the physical exertion of workers frequently climbing the wind turbine tower. Since workers only need to replace the main gear bodies 105 that are not connected to the transmission system, the operation is more convenient and allows the wind turbine to operate normally.

[0045] Since different drive shafts 104 need to quickly establish a connection with the output shaft 200 through the transmission unit when moving to the position of the output shaft 200, traditional connection methods such as couplings and bolts cannot be used. A structural method that allows for quick installation and disassembly is required, specifically as follows: Figure 5As shown, the transmission unit includes a wheel body 106 that is connected to the corresponding transmission shaft 104. The end face of the wheel body 106 is provided with an arc groove 107. The center of the arc groove 107 coincides with the rotation axis of the turntable 101. The output shaft 200 is provided with a filler body 108 that cooperates with the arc groove 107.

[0046] Since the center of the arc groove 107 coincides with the rotation axis of the turntable 101, when the turntable 101 rotates, different wheels 106 can move smoothly to the position of the output shaft 200, and the arc groove 107 can be fitted on the outside of the filler 108, so that the arc groove 107 and the filler 108 can be smoothly combined. When the drive shaft 104 moves away from the output shaft 200, the arc groove 107 can also be smoothly separated from the filler 108, thereby achieving quick installation and quick disassembly. When the main gear body 105 drives and drives the wheel 106 to rotate, the wheel 106 can smoothly drive the output shaft 200 to rotate through the arc groove 107 and the filler 108, thereby realizing power transmission. Moreover, this structure is simple, and the wheel 106 and the output shaft 200 are not prone to misalignment and jamming.

[0047] It should be noted that since the wheel body 106 and the output shaft 200 are connected through the arc groove 107 and the filler 108, the direction of the transmission shaft 104 and the arc groove 107 needs to be limited by the positioning part to prevent the main gear body 105 and the transmission shaft 104 from rotating arbitrarily, which would cause the center of the arc groove 107 to rotate off the axis of the turntable 101, making it impossible for the arc groove 107 to cooperate smoothly with the filler 108.

[0048] To achieve smooth positioning of the drive shaft 104 in the idle state and to keep the structure simple, such as Figure 6 As shown, the positioning part includes an extrusion body mounted on the fixed base 102 and a positioning wheel 109 eccentrically mounted on the drive shaft 104. The extrusion body is used to provide extrusion force to the outer wall of the positioning wheel 109. Since the positioning wheel 109 is eccentrically mounted on the drive shaft 104, the distance between different positions on the outer wall of the positioning wheel 109 and the axis of the drive shaft 104 is not equal. By using the extrusion body to extrude force to the outer wall of the positioning wheel 109, the extrusion body eventually stops at the position on the positioning wheel 109 with the shortest distance between it and the axis of the drive shaft 104. This achieves the positioning of the positioning wheel 109 and the drive shaft 104, preventing the drive shaft 104 from rotating arbitrarily.

[0049] Based on the above implementation, since the drive shaft 104 is displaced along the axis of the base 100, that is, the drive shaft 104 moves relative to the fixed seat 102, there will be relative movement between the extrusion body and the positioning wheel 109 along the axis of the base 100. When the positioning wheel 109 and the extrusion body are misaligned and separated, the extrusion body can no longer contact the outer wall of the positioning wheel 109, thus causing the positioning part to malfunction. To avoid this phenomenon, such as Figure 6As shown, slopes 110 are provided between the two end faces of the positioning wheel 109 and the drive shaft 104. The slopes 110 can be used to guide the extruded body. When the positioning wheel 109 and the extruded body are separated, the extruded body will contact the outer wall of the drive shaft 104. When the drive shaft 104 is reset, the extruded body will slide from the drive shaft 104 to the positioning wheel 109 by means of the slopes 110, thereby realizing the guiding work of the extruded body.

[0050] It should be noted that since the drive shaft 104 needs to rotate continuously under normal conditions, if the extrusion body and the positioning wheel 109 remain in contact, the positioning wheel 109 will push the extrusion body to reciprocate. This will cause equipment vibration, and the extrusion body needs to be allowed to move. To avoid the above problems, when the drive shaft 104 is running in the forward direction, the extrusion body can be positioned on the outer wall of the drive shaft 104. At this time, the movement of the drive shaft 104 will not interfere with the extrusion body, thereby ensuring stable operation of the equipment and ensuring that the positioning work is only performed when the main gear body 105 is idle.

[0051] Because the outer wall of the positioning wheel 109 is arc-shaped, when the extrusion body completes the positioning work of the positioning wheel 109, the positioning wheel 109 can still rotate within a small range using its arc surface. That is, the positioning work of the extrusion body on the positioning wheel 109 cannot make the positioning wheel 109 stationary. To improve the positioning effect, such as Figure 6 As shown, the position with the minimum distance between the positioning wheel 109 and the axis of the transmission shaft 104 is set as plane 111; when the extrusion body completes the positioning work of the positioning wheel 109, the extrusion body contacts plane 111. At this time, the extrusion body and plane 111 are in surface contact or in line contact perpendicular to the axis of the transmission shaft 104, thereby enabling the positioning wheel 109 to be in a stationary state and improving the positioning effect.

[0052] When the drive shaft 104 moves, in order to reduce the friction between the extrusion body and the drive shaft 104 and its structures, such as Figure 7 As shown, the extrusion body consists of several rollers 112 rotatably mounted on the fixed base 102, and the rollers 112 are arranged in a vertical trapezoidal shape, with the vertical surface of the trapezoid being used to abut against the plane 111.

[0053] The axis of the roller 112 is perpendicular to the axis of the drive shaft 104. By using several rollers 112, the rollers 112 can roll on the drive shaft 104, the slope 110, and the positioning wheel 109 when the drive shaft 104 moves, thereby reducing friction. The vertical trapezoidal distribution of several rollers 112 allows the rollers 112 on the upper and lower sides of the trapezoid to cooperate with the slope 110 when the drive shaft 104 moves, thereby increasing the guiding range and improving the guiding effect. Since the vertical surface of the trapezoid abuts against the plane 111, the extrusion body and the plane 111 can achieve line contact in the direction perpendicular to the axis of the drive shaft 104, thereby achieving static positioning of the positioning wheel 109.

[0054] It should be noted that when the roller 112 contacts the positioning wheel 109, the rotation direction of the positioning wheel 109 is perpendicular to the rotation direction of the roller 112, and it cannot achieve the effect of reducing friction. At this time, several ball structures or other structures can be set on the positioning wheel 109 or the roller 112 so that the cooperation between the roller 112 and the positioning wheel 109 can also achieve the effect of reducing friction.

[0055] Since the positions of several rollers 112 are fixed, when the extrusion body moves onto the slope 110, the rollers 112 will directly use the slope 110 to generate a lateral thrust on the drive shaft 104, thereby positioning the drive shaft 104, without having to move the rollers 112 onto the positioning wheel 109 before positioning begins. Of course, to improve the smoothness of positioning and the stability of the rotation of the drive shaft 104, the rollers 112 can be moved closer to or further away from the fixed seat 102, and the rollers 112 and the fixed seat 102 are connected by a guide rail, spring, or other structure, which makes the positioning work more stable.

[0056] Since the output shaft 200 is not effectively restricted when one drive shaft 104 leaves the output shaft 200 and the other drive shaft 104 has not yet moved to the position of the output shaft 200, the output shaft 200 can rotate freely. However, the rotation of the output shaft 200 will cause the filler 108 to rotate, making the arc groove 107 unable to properly cooperate with the filler 108. To avoid this phenomenon, the output shaft 200 needs to be restricted. That is, a limiting part for guiding and limiting the output shaft 200 is provided between two adjacent drive shafts 104. With the limiting part, when the output shaft 200 is located between two adjacent drive shafts 104, the orientation of the output shaft 200 is fixed, thereby allowing the arc groove 107 to move normally to the outside of the filler 108, so as to realize the normal cooperation between the arc groove 107 and the filler 108.

[0057] Based on the above implementation, such as Figure 3 and Figure 5 As shown, an arc groove 113 is provided on the filler 108, and the center of the arc groove 113 coincides with the rotation axis of the turntable 101.

[0058] The limiting part includes an arc rod 114 that is concentric with and cooperates with the arc groove 113;

[0059] Among them, at least one of the arc groove 113 and arc rod 114, and the arc groove 107 and filler 108 are used in a cooperative state;

[0060] The second arc groove 113, the filler 108, and the arc rod 114 are all concentric. The arc rod 114 moves synchronously in a circular motion with the drive shaft 104. When the first arc groove 107 on one drive shaft 104 moves and disengages from the output shaft 200, the corresponding arc rod 114 will slide into the second arc groove 113. At this time, the arc rod 114 limits the output shaft 200 through the second arc groove 113. When the arc rod 114 moves and disengages from the second arc groove 113, the corresponding arc groove 107 slides onto the filler 108 and cooperates with it, thereby realizing the positioning of the output shaft 200.

[0061] Since the drive shaft 104 needs to move along the axis of the base 100, while the position of the output shaft 200 is fixed, special settings are required for the transmission unit to achieve a continuous transmission effect between the drive shaft 104 and the output shaft 200, such as... Figure 2 and Figure 4 As shown, a base column 120 is provided at the bottom of the base plate 100, a collar 115 is rotatably provided on the base column 120, a number of support arms 116 corresponding to the number of transmission shafts 104 are provided on the collar 115, and a prism shaft 117 is rotatably provided on the support arm 116. The prism shaft 117 is connected to the corresponding wheel body 106 in a transmission connection, and the end of the prism shaft 117 is slidably inserted into the corresponding transmission shaft 104.

[0062] The base column 120 is used to support the base plate 100 and the turntable 101. The collar 115 can rotate on the base column 120. The collar 115 is mainly used to support the support arm 116 and the prism shaft 117. When the drive shaft 104 moves relative to the fixed seat 102, the drive shaft 104 and the prism shaft 117 slide relative to each other, and the drive shaft 104 and the prism shaft 117 can maintain synchronous rotation, thereby enabling the drive shaft 104 and the wheel 106 to always transmit power. The support arm 116 limits the position of the wheel 106 in the vertical direction.

[0063] The rotation of the collar 115 can be provided by a motor 400 and a transmission wheel 401 mounted on the base column 120, such as... Figure 4 As shown, the transmission wheel 401 is connected to the collar 115. The transmission wheel 401 is installed on the output end of the motor 400. When the motor 400 drives the collar 115 to rotate, the collar 115 can drive the fixed seat 102 and the turntable 101 to rotate on the base plate 100 through the transmission shaft 104, thereby changing the position of several main gear bodies 105.

[0064] Since the drive shaft 104 can move on the fixed base 102, power can be supplied to the drive shaft 104 by means of... Figure 3 As shown, a power unit is provided on the base column 120 to provide power for the movement of each movable frame 103 on the fixed seat 102. The power unit includes a motor 300 fixed relative to the base column 120, and the output end of the motor 300 is provided with a helical gear 301.

[0065] Each movable frame 103 is provided with a helical toothed groove 302, which is used in conjunction with the helical toothed column 301. The cross section of the helical toothed groove 302 is arc-shaped, and its arc center coincides with the rotation axis of the turntable 101.

[0066] Motor 300 can be directly mounted on base column 120. Motor 300 provides power to helical gear column 301, so that helical gear column 301 can cooperate with corresponding helical gear slot 302 and drive the corresponding transmission shaft 104 to move. In order to simplify the structure and avoid configuring a power unit for each transmission shaft 104, the cross-sectional shape of helical gear slot 302 is set to be arc-shaped. In this way, when several transmission shafts 104 move in a circular motion, the helical gear slots 302 on each transmission shaft 104 can move to the position of helical gear column 301 and mesh with each other, so as to achieve the purpose of one helical gear column 301 providing power to different helical gear slots 302.

[0067] In actual use, the position of motor 300 corresponds to the position of output shaft 200. When the transmission shaft 104 moves away from the output shaft 200, the corresponding helical tooth groove 302 separates from the helical tooth column 301. At this time, the transmission shaft 104 can move freely on the fixed seat 102. To avoid this phenomenon, a limiting body 118 and an elastic body 119 can be set on the moving frame 103. The limiting body 118 can limit the position of the moving frame 103 on the fixed seat 102, and the elastic body 119 provides elastic force for the moving frame 103, thereby fixing the position of the moving frame 103 on the fixed seat 102. When the helical tooth column 301 meshes with the helical tooth groove 302 and pushes the moving frame 103 to move, the moving frame 103 pulls the elastic body 119 to undergo elastic deformation.

[0068] When the main gear body 105 moves to the position where it engages with the external output gear plate, in order to release the motor 300, a locking structure for locking the position of the main gear body 105 can be set on the base plate 100. The locking structure includes a fixed frame 500 fixed on the base plate 100, an electromagnetic actuator 501 is set on the fixed frame 500, a moving plate 502 is set on the output end of the electromagnetic actuator 501, and a number of inserts 503 are set on the moving plate 502. Each moving frame 103 or each limiting body 118 has a slot for cooperating with the insert 503. In use, when the main gear body 105 moves to the specified position, the electromagnetic actuator 501 is de-energized. At this time, the spring in the electromagnetic actuator 501 can push the moving plate 502 and the inserts 503 to move. The inserts 503 are inserted laterally into the corresponding slots, thereby realizing the locking of the positions of the moving frame 103 and the main gear body 105.

[0069] 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 to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind turbine generator main drive gear replacement device, characterized in that, It includes a base plate, a turntable rotatably mounted on the base plate, several fixed seats distributed around the turntable, several movable frames slidably mounted on each of the fixed seats along the axis of the base plate, and an output shaft for power output. Each of the movable frames is rotatably mounted with a transmission shaft, and one end of each transmission shaft is provided with a main gear body. The output shaft is fixed relative to the base plate, and the other end of each transmission shaft is provided with a transmission part for alternating transmission connection with the output shaft. Each fixed seat is provided with a positioning part for positioning the transmission shaft in an idle state. The transmission unit includes a wheel body that is connected to the corresponding transmission shaft. The end face of the wheel body is provided with an arc groove. The center of the arc groove coincides with the rotation axis of the turntable. The output shaft is provided with a filler body that cooperates with the arc groove. The positioning part includes an extrusion body mounted on the fixed base and a positioning wheel eccentrically mounted on the drive shaft. The extrusion body is used to provide extrusion force to the outer wall of the positioning wheel. A limiting part for guiding and limiting the output shaft is provided between two adjacent drive shafts; The filler has a second arc groove, and the center of the second arc groove coincides with the rotation axis of the turntable. The limiting part includes an arc rod that is concentric with the second arc groove and is used in conjunction with the second arc groove; Among them, the second arc groove is used in conjunction with at least one of the arc rod and the first arc groove and the filler.

2. The wind turbine generator main gear replacement device according to claim 1, characterized in that, Both ends of the positioning wheel are provided with slopes between them and the drive shaft.

3. The wind turbine generator main gear replacement device according to claim 2, characterized in that, The position where the distance between the positioning wheel and the axis of the transmission shaft is minimized is set as a plane.

4. The wind turbine generator main gear replacement device according to claim 3, characterized in that, The extrusion body consists of several rollers rotatably mounted on the fixed base, and the rollers are arranged in a vertical trapezoidal shape, with the vertical surface of the trapezoid being used to abut against the plane.

5. A wind turbine generator drive main gear replacement device according to claim 1, characterized in that, The base plate has a base column at its bottom, a collar is rotatably mounted on the base column, and a number of support arms corresponding to the number of transmission shafts are mounted on the collar. A prism is rotatably mounted on each support arm, and the prism is connected to the corresponding wheel body for transmission. The end of the prism is slidably inserted into the corresponding transmission shaft.

6. A wind turbine generator drive main gear replacement device according to claim 5, characterized in that, The base column is provided with a power unit for providing power for the movement of each of the movable frames on the fixed base. The power unit includes a motor fixed relative to the base column, and the output end of the motor is provided with a helical gear column. Each of the movable frames is provided with a helical toothed groove, which is used in conjunction with the helical toothed column. The cross-section of the helical toothed groove is arc-shaped, and the center of the arc coincides with the rotation axis of the turntable.

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