Flexible wind wheel locking structure of typhoon-resistant wind turbine braking system

Abstract

The present invention discloses a flexible wind wheel locking structure of a typhoon-resistant wind turbine generator braking system. The flexible wind wheel locking design scheme is adopted. Three restoring force generating units are arranged circumferentially and distributed on the lower half of the front flange of the gear box. The swinging trolley is fixedly connected to the outer shell of the wind wheel locking pin assembly of the braking system, and can move in the arc-shaped guide rail slot of the front flange of the gear box, driving the steel wire rope group connected to it on the left or right side to tighten, and then driving the corresponding group of guide columns in each restoring force generating unit to be pulled out at the same time, so that the three groups of springs mounted on their respective guide columns are compressed at the same time, and provide restoring force to the wind wheel. The present invention can allow the wind wheel to swing within a certain angle. When the wind wheel deviates more from the positive "Y" direction, the restoring force is greater, which can significantly reduce the load of the whole machine under typhoon conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of brake system design for typhoon-resistant wind turbine generator sets, and in particular to a flexible wind wheel locking structure of a brake system for typhoon-resistant wind turbine generator sets, which is used to lock the wind wheel in typhoon-resistant working conditions so that the wind wheel can only swing within a certain angle range along the transmission axis and provide appropriate torsional stiffness. Background Art

[0002] It is well known in the industry that megawatt-class three-blade typhoon-resistant wind turbines generally use variable pitch control to feather the three blades, and the wind rotor is free to idle to avoid excessive load on the whole machine. For three-blade typhoon-resistant wind turbines, after feathering the three blades, the wind rotor needs to be locked in a horizontal position of the blades to minimize the load on the wind turbine. When the wind rotor rotates, the wind load on the wind rotor changes at different angles. When the wind rotor is in the positive "Y" direction, that is, when one of the blades is vertically downward, the wind load on the wind rotor is small. However, if the wind rotor is completely locked, the unbalanced load of the wind rotor cannot be released, which will significantly increase the instantaneous limit load of the wind turbine. Especially for downwind typhoon-resistant wind turbines, the existing technology is to completely release or completely lock the wind rotor, resulting in a large load on the whole machine at the typhoon limit wind speed. In addition, for the design of downwind three-blade typhoon-resistant wind turbines, the wind rotor is free to rotate at no load to resist the typhoon, and the wind rotor load will increase greatly. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art. Aiming at the problem that the existing typhoon-resistant wind turbine generator sets completely lock or completely release the wind wheel, resulting in a heavy load on the entire unit, a flexible wind wheel locking structure of the braking system of a typhoon-resistant wind turbine generator set is proposed. A flexible wind wheel locking design scheme is adopted to allow the wind wheel to swing within a certain angle and provide a restoring force for the wind wheel. The greater the angle deviation from the positive "Y" position, the greater the restoring force, which can greatly reduce the load on the wind wheel and the entire machine, greatly reducing the overall design difficulty of the wind turbine generator set.

[0004] To achieve the above-mentioned purpose, the first technical solution provided by the present invention is: a flexible wind rotor locking structure of a typhoon-resistant wind turbine generator set braking system, wherein the braking system of the wind turbine generator set comprises a wind rotor locking disk, a front end flange of a gear box, and a wind rotor locking pin assembly, wherein the wind rotor locking disk is fixed to the hub of the wind rotor by bolts, the front end flange of the gear box is a part of the gear box of the wind turbine generator set, and is respectively fixed to the generator and the nacelle shell of the wind turbine generator set by bolts, the wind rotor locking pin assembly comprises a wind rotor locking pin and a driving device for driving the wind rotor locking pin to extend or retract, and under the action of the driving device, the wind rotor locking pin can extend into the locking hole on the wind rotor locking disk, thereby locking the wind rotor by locking the wind rotor locking disk; the flexible wind rotor locking structure is a flexible wind rotor locking structure. The wind wheel locking structure includes a swinging trolley, a first wire rope group, a second wire rope group, a third wire rope group, a fourth wire rope group, a movable pulley, a first fixed pulley group, a second fixed pulley group and three restoring force generating units; an arc-shaped guide rail slot extending along its circumference is formed on the upper half of the front end flange of the gear box, and the left and right parts of the arc-shaped guide rail slot are mirror-symmetrical about the vertical center line of the front end flange of the gear box; the swinging trolley is installed in the arc-shaped guide rail slot and can only move in the arc-shaped guide rail slot; two of the wind wheel locking pin assemblies are placed in the arc-shaped guide rail slot and are located on the left and right sides of the swinging trolley, and the shells of the two wind wheel locking pin assemblies are respectively connected to the left and right ends of the swinging trolley to form a whole, so that when After the wind wheel locking pin extends out to lock the wind wheel, the rotation of the wind wheel can drive the two wind wheel locking pin assemblies to move with the swinging trolley within the angle range limited by the arc guide rail slot; three restoring force generating units are distributed in the lower half of the front end flange of the gear box, one of the restoring force generating units is located in the middle of the bottom of the front end flange of the gear box, which is a central arrangement, and the other two restoring force generating units are symmetrically installed on the left and right sides of the front end flange of the gear box, the restoring force generating unit includes a first guide column, a second guide column, a first guide column end plate, a second guide column end plate, a spring, a first spring end plate, a second spring end plate and a frame, the frame is fixed on the front end flange of the gear box, the spring, the first spring end plate and the second spring end plate are placed in the frame, and the first guide The column and the second guide column are inserted on the frame in parallel with each other, one end of the first guide column passes through one side of the frame and is connected to the first guide column end plate, and the other end thereof passes through the first spring end plate and is connected to the second spring end plate, one end of the second guide column passes through the other side of the frame and is connected to the second guide column end plate, and the other end thereof passes through the second spring end plate and is connected to the first spring end plate, two of the springs are located between the first spring end plate and the second spring end plate, and are respectively sleeved on the first guide column and the second guide column, that is, one guide column is sleeved with one spring, and the two ends of the spring are respectively connected to the first spring end plate and the second spring end plate, the first spring end plate can slide on the first guide column, and the second spring end plate can slide on the second guide column;Two symmetrically distributed movable pulley mounting frames are formed on the left and right sides of the upper half of the front end flange of the gear box. The movable pulley mounting frames are close to the limit positions on the corresponding sides of the arc-shaped guide rail slots, and are formed with two mutually symmetrical, outwardly inclined and downwardly elongated sliding grooves. A shaft that can slide in the two elongated sliding grooves crosses between the two elongated sliding grooves. The movable pulley is assembled on the shaft and is located between the two elongated sliding grooves, and can slide with the shaft within the range defined by the elongated sliding grooves; the first fixed pulley group is installed between the two restoring force generating units arranged in the center and on the left, and the second fixed pulley group is installed between the two restoring force generating units arranged in the center and on the right. , and the first fixed pulley group and the second fixed pulley group are distributed in mirror symmetry, each fixed pulley group is composed of three fixed pulleys arranged side by side; one end of the first steel wire rope group is fixedly connected to the outer shell of the wind wheel locking pin assembly on the left side of the swing trolley, and the other end thereof is downwardly bypassed around the movable pulley on the movable pulley mounting frame on the left side and then connected to the first guide column end plate of the restoring force generating unit on the left; the second steel wire rope group has three groups of three fixed pulleys corresponding to the first fixed pulley group, one end of the middle group of second steel wire rope groups passes through the second guide column end plate and one side of the frame of the restoring force generating unit on the left side in sequence, and then is connected to the second spring end plate of the restoring force generating unit, and the other end is downwardly bypassed around the first fixed pulley The fixed pulley in the middle of the group is then connected to the first guide column end plate of the center restoring force generating unit, one end of the other two groups of second steel wire rope groups are connected to the second guide column end plate of the restoring force generating unit on the left, and the other ends respectively pass downward around the two fixed pulleys corresponding to the first fixed pulley group and then pass through the one side of the frame of the center restoring force generating unit to be connected to the first spring end plate of the restoring force generating unit; the third steel wire rope group has three groups of three fixed pulleys corresponding to the second fixed pulley group, the middle group of the third wire rope group passes through the second guide column end plate and one side of the frame of the center restoring force generating unit in turn and is connected to the second spring end plate of the restoring force generating unit, and the other ends One end of the third steel wire rope group passes around the fixed pulley in the middle of the second fixed pulley group and is connected upward to the first guide column end plate of the right restoring force generating unit. One end of the other two groups of third steel wire rope groups are connected to the second guide column end plate of the middle restoring force generating unit, and the other end passes around the two corresponding fixed pulleys of the first fixed pulley group and passes upward through the frame side of the right restoring force generating unit to be connected to the first spring end plate of the restoring force generating unit; one end of the fourth steel wire rope group is fixedly connected to the outer shell of the wind wheel locking pin assembly on the right side of the swing trolley, and the other end of the fourth steel wire rope group passes around the movable pulley on the right movable pulley mounting frame downward and is connected to the second guide column end plate of the right restoring force generating unit. ;

[0005] Furthermore, the swing trolley adopts double-layer double-row conical rolling wheels, which can withstand the additional bending moment generated on the wind wheel locking pin assembly.

[0006] Furthermore, buffers are installed at the extreme positions of both ends of the arc-shaped guide rail slot to reduce the impact force generated when the wind wheel locking assembly swings to the extreme position.

[0007] Furthermore, the two wind wheel locking pin assemblies are spaced 60° apart.

[0008] The second technical solution provided by the present invention is: a flexible wind rotor locking structure of a typhoon-resistant wind turbine braking system, wherein the braking system of the wind turbine comprises a wind rotor locking disk, a front end flange of a gear box, and a wind rotor locking pin assembly, wherein the wind rotor locking disk is fixed to the hub of the wind rotor by bolts, the front end flange of the gear box is a part of the gear box of the wind turbine, and is respectively fixed to the generator and the nacelle shell of the wind turbine by bolts, the wind rotor locking pin assembly comprises a wind rotor locking pin and a driving device for driving the wind rotor locking pin to extend or retract, and under the action of the driving device, the wind rotor locking pin can extend into the locking hole on the wind rotor locking disk, thereby locking the wind rotor by locking the wind rotor locking disk; the flexible wind rotor The locking structure includes a swinging trolley, a first wire rope group, a second wire rope group, a third wire rope group, a fourth wire rope group, a movable pulley, a first fixed pulley group, a second fixed pulley group and three restoring force generating units; an upper half of the front end flange of the gear box is formed with an arc-shaped guide rail slot extending along its circumference, and the left and right parts of the arc-shaped guide rail slot are mirror-symmetrical about the vertical center line of the front end flange of the gear box; the swinging trolley is installed in the arc-shaped guide rail slot and can only move in the arc-shaped guide rail slot, one of the wind wheel locking pin assemblies is placed in the arc-shaped guide rail slot and is located on the left side of the swinging trolley, and the outer shell of the wind wheel locking pin assembly is connected to the left end of the swinging trolley to form a whole, so that when the wind wheel locking pin extends out to lock Behind the wind wheel, the rotation of the wind wheel can drive the wind wheel locking pin assembly to move with the swinging trolley within the angle range limited by the arc guide rail slot; three restoring force generating units are distributed on the lower half of the front end flange of the gear box, one of the restoring force generating units is located in the middle of the bottom of the front end flange of the gear box, which is a central arrangement, and the other two restoring force generating units are symmetrically installed on the left and right sides of the front end flange of the gear box, the restoring force generating unit includes a first guide column, a second guide column, a first guide column end plate, a second guide column end plate, a spring, a first spring end plate, a second spring end plate and a frame, the frame is fixed on the front end flange of the gear box, the spring, the first spring end plate and the second spring end plate are placed in the frame, the first guide column and the second guide column The guide posts are inserted on the frame in parallel with each other, one end of the first guide post passes through one side of the frame and is connected to the first guide post end plate, and the other end thereof passes through the first spring end plate and is connected to the second spring end plate, one end of the second guide post passes through the other side of the frame and is connected to the second guide post end plate, and the other end thereof passes through the second spring end plate and is connected to the first spring end plate, two of the springs are located between the first spring end plate and the second spring end plate, and are respectively sleeved on the first guide post and the second guide post, that is, one guide post is sleeved with one spring, and the two ends of the spring are respectively connected to the first spring end plate and the second spring end plate, the first spring end plate can slide on the first guide post, and the second spring end plate can slide on the second guide post;Two symmetrically distributed movable pulley mounting frames are formed on the left and right sides of the upper half of the front end flange of the gear box. The movable pulley mounting frames are close to the limit positions of the corresponding sides of the arc-shaped guide rail slots, and are formed with two mutually symmetrical, outwardly inclined and downwardly inclined long strip sliding grooves. A shaft that can slide in the two long strip sliding grooves crosses between the two long strip sliding grooves. The movable pulley is assembled on the shaft and is located between the two long strip sliding grooves. It can slide with the shaft within the range defined by the long strip sliding grooves; the first fixed pulley group is installed between the two restoring force generating units arranged in the center and on the left, and the second fixed pulley group is installed between the two restoring force generating units arranged in the center and on the right. Elements, and the first fixed pulley group and the second fixed pulley group are distributed in mirror symmetry, each fixed pulley group consists of three fixed pulleys arranged side by side; one end of the first steel wire rope group is fixedly connected to the outer shell of the wind wheel locking pin assembly, and the other end of the first steel wire rope group is downwardly bypassed the movable pulley on the movable pulley mounting frame on the left and then connected to the first guide column end plate of the restoring force generating unit on the left; the second steel wire rope group has three groups corresponding to the three fixed pulleys of the first fixed pulley group, and one end of the second steel wire rope group in the middle group passes through the second guide column end plate and one side of the frame of the restoring force generating unit on the left in sequence, and then is connected to the second spring end plate of the restoring force generating unit, and the other end is downwardly bypassed the first fixed pulley The fixed pulley in the middle of the wheel group is connected to the first guide column end plate of the central restoring force generating unit, one end of the other two groups of second steel wire rope groups are connected to the second guide column end plate of the left restoring force generating unit, and the other ends respectively pass downward around the two fixed pulleys corresponding to the first fixed pulley group and then pass through the frame side of the central restoring force generating unit to be connected to the first spring end plate of the restoring force generating unit; the third steel wire rope group has three groups of three fixed pulleys corresponding to the second fixed pulley group, and the middle group of the third steel wire rope group passes through the second guide column end plate and the frame side of the central restoring force generating unit in turn and is connected to the second spring end plate of the restoring force generating unit The other end of the third steel wire rope group is connected to the first guide column end plate of the right restoring force generating unit after passing through the fixed pulley in the middle of the second fixed pulley group. One end of the other two groups of third steel wire rope groups is connected to the second guide column end plate of the middle restoring force generating unit, and the other end of the third steel wire rope group is connected to the first spring end plate of the restoring force generating unit after passing through the two fixed pulleys corresponding to the first fixed pulley group and passing through the frame side of the right restoring force generating unit upward; one end of the fourth steel wire rope group is fixedly connected to the right end of the swing trolley, and the other end of the fourth steel wire rope group is connected to the second guide column end plate of the right restoring force generating unit after passing through the movable pulley on the movable pulley mounting frame downward.

[0009] Furthermore, the swing trolley adopts double-layer double-row conical rolling wheels, which can withstand the additional bending moment generated on the wind wheel locking pin assembly.

[0010] Furthermore, buffers are installed at the extreme positions of both ends of the arc-shaped guide rail slot to reduce the impact force generated when the wind wheel locking assembly swings to the extreme position.

[0011] The third technical solution provided by the present invention is: a flexible wind rotor locking structure of a typhoon-resistant wind turbine braking system, wherein the braking system of the wind turbine comprises a wind rotor locking disk, a front end flange of a gear box, and a wind rotor locking pin assembly, wherein the wind rotor locking disk is fixed to the hub of the wind rotor by bolts, the front end flange of the gear box is a part of the gear box of the wind turbine, and is respectively fixed to the generator and the nacelle shell of the wind turbine by bolts, the wind rotor locking pin assembly comprises a wind rotor locking pin and a driving device for driving the wind rotor locking pin to extend or retract, and under the action of the driving device, the wind rotor locking pin can extend into the locking hole on the wind rotor locking disk, thereby locking the wind rotor by locking the wind rotor locking disk; the flexible wind rotor The locking structure includes a swinging trolley, a first wire rope group, a second wire rope group, a third wire rope group, a fourth wire rope group, a movable pulley, a first fixed pulley group, a second fixed pulley group and three restoring force generating units; an upper half of the front end flange of the gear box is formed with an arc-shaped guide rail slot extending along its circumference, and the left and right parts of the arc-shaped guide rail slot are mirror-symmetrical about the vertical center line of the front end flange of the gear box; the swinging trolley is installed in the arc-shaped guide rail slot and can only move in the arc-shaped guide rail slot, one of the wind wheel locking pin assemblies is placed in the arc-shaped guide rail slot and is located on the right side of the swinging trolley, and the outer shell of the wind wheel locking pin assembly is connected to the right end of the swinging trolley to form a whole, so that when the wind wheel locking pin extends out to lock Behind the wind wheel, the rotation of the wind wheel can drive the wind wheel locking pin assembly to move with the swinging trolley within the angle range limited by the arc guide rail slot; three restoring force generating units are distributed on the lower half of the front end flange of the gear box, one of the restoring force generating units is located in the middle of the bottom of the front end flange of the gear box, which is a central arrangement, and the other two restoring force generating units are symmetrically installed on the left and right sides of the front end flange of the gear box, the restoring force generating unit includes a first guide column, a second guide column, a first guide column end plate, a second guide column end plate, a spring, a first spring end plate, a second spring end plate and a frame, the frame is fixed on the front end flange of the gear box, the spring, the first spring end plate and the second spring end plate are placed in the frame, the first guide column and the second guide column The guide posts are inserted on the frame in parallel with each other, one end of the first guide post passes through one side of the frame and is connected to the first guide post end plate, and the other end thereof passes through the first spring end plate and is connected to the second spring end plate, one end of the second guide post passes through the other side of the frame and is connected to the second guide post end plate, and the other end thereof passes through the second spring end plate and is connected to the first spring end plate, two of the springs are located between the first spring end plate and the second spring end plate, and are respectively sleeved on the first guide post and the second guide post, that is, one guide post is sleeved with one spring, and the two ends of the spring are respectively connected to the first spring end plate and the second spring end plate, the first spring end plate can slide on the first guide post, and the second spring end plate can slide on the second guide post;Two symmetrically distributed movable pulley mounting frames are formed on the left and right sides of the upper half of the front end flange of the gear box. The movable pulley mounting frames are close to the limit positions of the corresponding sides of the arc-shaped guide rail slots, and are formed with two mutually symmetrical, outwardly inclined and downwardly inclined long strip sliding grooves. A shaft that can slide in the two long strip sliding grooves crosses between the two long strip sliding grooves. The movable pulley is assembled on the shaft and is located between the two long strip sliding grooves. It can slide with the shaft within the range defined by the long strip sliding grooves; the first fixed pulley group is installed between the two restoring force generating units arranged in the center and on the left, and the second fixed pulley group is installed between the two restoring force generating units arranged in the center and on the right. Elements, and the first fixed pulley group and the second fixed pulley group are distributed in mirror symmetry, each fixed pulley group consists of three fixed pulleys arranged side by side; one end of the first steel wire rope group is fixedly connected to the left end of the swinging trolley, and the other end thereof passes downward around the movable pulley on the movable pulley mounting frame on the left and is connected to the first guide column end plate of the restoring force generating unit on the left; the second steel wire rope group has three groups of three fixed pulleys corresponding to the first fixed pulley group, one end of the second steel wire rope group in the middle passes through the second guide column end plate and one side of the frame of the restoring force generating unit on the left in sequence, and is connected to the second spring end plate of the restoring force generating unit, and the other end passes downward around the first fixed pulley group The third steel wire rope group has three groups of three fixed pulleys corresponding to the second fixed pulley group, and the middle group of the third steel wire rope group passes through the second guide column end plate and one side of the frame of the restoring force generating unit in the middle in turn, and is connected to the second spring end plate of the restoring force generating unit. The other end passes around the fixed pulley in the middle of the second fixed pulley group and is connected upward to the first guide column end plate of the right restoring force generating unit. One end of the other two groups of third steel wire rope groups is connected to the second guide column end plate of the middle restoring force generating unit, and the other end passes around the two corresponding fixed pulleys of the first fixed pulley group and passes upward through the frame side of the right restoring force generating unit to be connected to the first spring end plate of the restoring force generating unit; one end of the fourth steel wire rope group is fixedly connected to the housing of the wind wheel locking pin assembly, and the other end passes downward around the movable pulley on the right movable pulley mounting frame and is connected to the second guide column end plate of the right restoring force generating unit. ;

[0012] Furthermore, the swing trolley adopts double-layer double-row conical rolling wheels, which can withstand the additional bending moment generated on the wind wheel locking pin assembly.

[0013] Furthermore, buffers are installed at the extreme positions of both ends of the arc-shaped guide rail slot to reduce the impact force generated when the wind wheel locking assembly swings to the extreme position.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] 1. The present invention adopts a flexible wind wheel locking design scheme, which allows the wind wheel to swing within a certain angle, such as ±30°, and provides a restoring force for the wind wheel. The greater the angle deviates from the positive "Y" position, the greater the restoring force. Before the typhoon arrives during typhoon resistance conditions, the wind wheel is locked in the positive "Y" position where the blade force is the smallest, allowing the wind wheel to swing within a certain angle, such as ±27°, after the typhoon arrives. After the wind wheel is blown away from the positive "Y" position by the typhoon, when the wind force decreases, the wind wheel can return to the positive "Y" position, that is, the position with the smallest load, thereby significantly reducing the load of the entire machine under typhoon conditions.

[0016] 2. Since the flexible wind wheel locking structure of the present invention is related to the operating safety of the wind turbine generator set, it requires very high reliability; therefore, the present invention adopts a mechanical structure composed of a spring and a wire rope group to achieve the flexible wind wheel locking function, avoiding the use of complex electrical and hydraulic devices, that is, there is no complex electrical and hydraulic structure, and the reliability is very high.

[0017] 3. The spring can be designed according to the requirements of the wind wheel locking limit torque and restoring force, and different locking stiffnesses can be designed to meet the load design requirements of the whole machine.

[0018] 4. The present invention provides an effective solution for reducing the design load of the downwind three-blade typhoon-resistant unit by reducing the locking stiffness of the wind wheel.

[0019] 5. Since the present invention directly locks the hub side of the wind wheel without passing through the gear box of the wind turbine generator set, it will not cause damage to the gear box, thereby improving the reliability of the unit.

[0020] 6. Since the swing arc length of the wind wheel locking assembly is very large, the compression spring that meets such a large stroke requirement is very long. Therefore, the present invention provides three restoring force generating units, each of which includes a group of springs (including two springs). The three restoring force generating units are connected in series through a wire rope group, which is equivalent to using three groups of springs in series to share the stroke. Each group of springs provides one-third of the total stroke, which can enhance compression stability.

[0021] 7. The three restoring force generating units provided in the present invention are arranged circumferentially around the lower half of the front end flange of the gear, which can save installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a partial schematic diagram of the typhoon-resistant wind turbine braking system in Example 1.

[0023] Figure 2 This is the front view of the flexible wind wheel locking structure in Example 1.

[0024] Figure 3 This is an axial view of the flexible wind wheel locking structure in Example 1.

[0025] Figure 4 This is a side view of the flexible wind wheel locking structure in Example 1.

[0026] Figure 5 This is a cross-sectional view of the swing trolley in Example 1 after being installed in the arc guide rail slot.

[0027] Figure 6 This is the front view of the flexible wind wheel locking structure in Example 2.

[0028] Figure 7 This is the front view of the flexible wind wheel locking structure in Example 3. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific embodiments.

[0030] Example 1

[0031] The flexible wind wheel locking structure provided in this embodiment is mainly used in the braking system of a typhoon-resistant wind turbine generator set, such as Figure 1 As shown, the braking system is mainly composed of a wind rotor locking disk 14, a front end flange 3 of a gear box, and a wind rotor locking pin assembly 2. The wind rotor locking disk 14 is fixed to a hub 15 of a wind rotor (not shown in the figure) by bolt connection. The front end flange 3 of the gear box is a part of the gear box of the wind turbine generator set, and is respectively fixed to a generator (not shown in the figure) and a nacelle shell 16 of the wind turbine generator set by bolt connection. The wind rotor locking pin assembly 2 includes a wind rotor locking pin 201 and a driving device (not shown in the figure) for driving the wind rotor locking pin 201 to extend or retract. When the wind rotor needs to be locked, the locking hole on the wind rotor locking disk 14 is first aligned with the wind rotor locking pin 201, and then the wind rotor locking pin 201 is extended into the locking hole on the wind rotor locking disk 14, thereby locking the wind rotor by locking the wind rotor locking disk 14, so that the flexible wind rotor locking structure takes effect.

[0032] See also Figures 2 to 4As shown, the flexible wind wheel locking structure described in this embodiment includes a swinging trolley 1, a first steel wire rope group 6, a second steel wire rope group 7, a third steel wire rope group 8, a fourth steel wire rope group 9, a movable pulley 10, a first fixed pulley group 12, a second fixed pulley group 13 and three restoring force generating units 5. Among them, the upper half of the front end flange 3 of the gear box is formed with an arc guide rail slot hole 4 extending along its circumference, and the left and right parts of the arc guide rail slot hole 4 are mirror-symmetrical about the vertical center line of the front end flange 3 of the gear box; the swinging trolley 1 is installed in the arc guide rail slot hole 4 and can only move in the arc guide rail slot hole 4, and the wind wheel locking pin assembly 2 has two disposed in the arc guide rail slot hole 4 and located on the left and right sides of the swinging trolley 1, and the shells of the two wind wheel locking pin assemblies 2 are respectively connected to the left and right ends of the swinging trolley 1 to form a fixed one. As a whole, after the wind wheel locking pin 201 extends out to lock the wind wheel, the rotation of the wind wheel can drive the two wind wheel locking pin assemblies 2 to move with the swinging trolley 1 within the angle range limited by the arc guide slot 4, and buffers are installed at the extreme positions at both ends of the arc guide slot 4 (according to the shape of the arc guide slot 4, a rubber pad or a rubber spring is customized to buffer the wind wheel locking assembly 2 when it swings to the extreme position, and of course other elastic materials or spring-type buffers can also be used) to reduce the impact force generated when the wind wheel locking assembly 2 swings to the extreme position;Three restoring force generating units 5 are distributed in the lower half of the front end flange 3 of the gear box, one of the restoring force generating units 5 is located in the middle of the bottom of the front end flange 3 of the gear box, and is centrally arranged, and the other two restoring force generating units 5 are symmetrically installed on the left and right sides of the front end flange 3 of the gear box, and the restoring force generating unit 5 includes a first guide column 501, a second guide column 502, a first guide column end plate 503, a second guide column end plate 504, a spring 505, a first spring end plate 508, a second spring end plate 507 and a frame 506, the frame 506 is fixed on the front end flange 3 of the gear box, the spring 505, the first spring end plate 508 and the second spring end plate 507 are placed in the frame 506, and the first guide column 50 The first guide post 501 and the second guide post 502 are inserted into the frame 506 in parallel with each other. One end of the first guide post 501 passes through one side of the frame 506 and is connected to the first guide post end plate 503, and the other end passes through the first spring end plate 508 and is connected to the second spring end plate 507. One end of the second guide post 502 passes through the other side of the frame 506 and is connected to the second guide post end plate 504, and the other end passes through the second spring end plate 507 and is connected to the first spring end plate 508. The spring 505 has two ends located between the first spring end plate 508 and the second spring end plate 507, and is respectively mounted on the first guide post 501 and the second guide post 502, that is, one guide post is mounted with one spring, and the two ends of the spring 505 are respectively The first spring end plate 508 and the second spring end plate 507 are respectively connected, the first spring end plate 508 can slide on the first guide column 501, and the second spring end plate 507 can slide on the second guide column 502; two symmetrically distributed movable pulley mounting frames 11 are formed on the left and right sides of the upper half of the front end flange 3 of the gear box, and the movable pulley mounting frames 11 are close to the limit positions on the corresponding sides of the arc-shaped guide rail slot 4, and are formed with two mutually symmetrical, outwardly oblique and downwardly inclined long strip sliding grooves 1101, and a shaft 1001 that can slide in the two long strip sliding grooves 1101 is crossed between the two long strip sliding grooves 1101, and the movable pulley 10 is assembled on the shaft 1001 and is located in the two long strip sliding grooves 1 101, and can slide with the shaft 1001 within the range defined by the long strip sliding groove 1101; the first fixed pulley group 12 is installed between the two restoring force generating units 5 arranged in the center and on the left, and the second fixed pulley group 13 is installed between the two restoring force generating units 5 arranged in the center and on the right, and the first fixed pulley group 12 and the second fixed pulley group 13 are distributed in mirror symmetry, and each fixed pulley group is composed of three fixed pulleys arranged side by side; one end of the first steel wire rope group 6 is fixedly connected to the outer shell of the wind wheel locking pin assembly 2 on the left side of the swing trolley 1, and the other end thereof is connected to the first guide column end plate 503 of the restoring force generating unit 5 on the left after passing downward around the movable pulley 10 on the movable pulley mounting frame 11 on the left;Holes are opened at corresponding positions on both sides of the three frames 506 on the front flange of the gearbox to allow the second steel wire rope group 7 and the third steel wire rope group 8 to pass through; the second steel wire rope group 7 has three groups of three fixed pulleys corresponding to the first fixed pulley group 12, one end of the middle group of second steel wire rope group 7 passes through the second guide column end plate 504 and one side of the frame 506 of the restoring force generating unit 5 on the left in sequence, and is connected to the second spring end plate 507 of the restoring force generating unit 5, and the other end passes downward around the middle fixed pulley of the first fixed pulley group 12 and is connected to the first guide column end plate 503 of the restoring force generating unit 5 in the middle, and one end of the other two groups of second steel wire rope groups 7 is connected to the second guide column end plate 504 of the restoring force generating unit 5 on the left, and the other end passes downward around the two corresponding fixed pulleys of the first fixed pulley group 12 and passes through one side of the frame 506 of the restoring force generating unit 5 in the middle and is connected to the first spring end plate 508 of the restoring force generating unit 5; the third steel wire rope group 8 has three groups of corresponding fixed pulleys of the second fixed pulley group 1 3, the middle group of third steel wire ropes 8 passes through the second guide column end plate 504 and one side of the frame 506 of the restoring force generating unit 5 in the middle in sequence, and then is connected to the second spring end plate 507 of the restoring force generating unit 5, and the other end passes around the middle fixed pulley of the second fixed pulley group 13 and then is upwardly connected to the first guide column end plate 503 of the restoring force generating unit 5 on the right side, and one end of the other two groups of third steel wire ropes 8 is connected to the second guide column end plate 504 of the restoring force generating unit 5 in the middle, and the other end passes around the two corresponding fixed pulleys of the first fixed pulley group 12 and then passes upward through one side of the frame 506 of the restoring force generating unit 5 on the right side and is connected to the first spring end plate 508 of the restoring force generating unit 5; one end of the fourth steel wire rope group 9 is fixedly connected to the outer shell of the wind wheel locking pin assembly 2 on the right side of the swing trolley 1, and the other end passes downward around the movable pulley 10 on the movable pulley mounting frame 11 on the right side and then is connected to the second guide column end plate 504 of the restoring force generating unit 5 on the right side. ;

[0033] Since all components of the flexible wind wheel locking structure are supported on the front flange 3 of the gearbox, the structure and size of this flange need to be designed according to the installation and load requirements. In addition, the angle range of the arc guide slot 4 is determined according to the design requirements, generally to meet the swing travel requirement of ±30° for wind wheel locking, and the surface of the arc guide needs to be hardened.

[0034] The two wind wheel locking pin assemblies 2 need to be spaced 60° apart to meet the requirements of different locking states of a blade, either horizontally or vertically. In addition, the size of the wind wheel locking pin is designed according to the ultimate locking torque, and the driving device of the wind wheel locking pin can be manual or electric. Since the wind wheel locking pin assembly 2 needs to swing with the swing trolley 1, the electric device needs to add a rotating cable retraction or swinging retraction device. A limit device can be added to the wind wheel locking pin assembly 2. Under maintenance conditions, the limit device is used to lock the wind wheel so that the wind wheel is completely locked. The limit device of the wind wheel locking assembly 2 can be a latch type or a locking hole can be opened at the tail of the assembly, and then a locking pin device fixed to the front end flange 3 of the gear box is connected in series for locking.

[0035] See also Figure 5 As shown, the support shaft 101 and bracket 102 of the swing trolley 1 are designed based on strength. The bracket 102 can adopt a frame-type split structure, and the two split parts are connected and pre-tightened by bolt connection. The conical rolling wheel 103 is supported by a ball bearing or a roller bearing, that is, a double-layer double-row conical rolling wheel is adopted. The swing trolley 1 can also increase the radial rolling wheel to bear the radial force. The conical rolling wheel 103 can also be designed as a cylindrical or spherical roller to withstand the bending moment and radial and axial forces in accordance with the shape of the guide rail. In addition, the swing trolley 1 needs to withstand the additional bending moment generated by the wind wheel locking pin assembly 2, so the preferred solution is to use a double-layer double-row conical rolling wheel to withstand the additional bending moment and radial and axial forces.

[0036] The number of wire ropes in the wire rope group is determined according to the design requirements: the wire rope design should take a safety factor of more than 5 times. It can be determined in combination with the installation space requirements. The wire rope needs to consider the corrosion protection requirements of the offshore environment, and stainless steel wire ropes are preferred. The pulley design meets the requirements of wire rope support and load transmission, and the pulley diameter meets the design specifications of the lifting industry. In principle, any spring type that meets the bearing capacity and stroke requirements can be used to form the spring. Due to the limited bearing capacity of the tension spring and the low connection reliability, compression springs are required to form the spring. Circular cross-section cylindrical helical compression springs are preferred, and the number of springs is determined according to the bearing capacity requirements. Rectangular and other non-circular cross-section cylindrical helical springs can also be used, and combined springs can also be used to increase the bearing capacity. Special-shaped springs or combination springs of different specifications and types can be selected according to the stiffness curve requirements.

[0037] Since the swing arc length of the wind wheel locking pin assembly 2 is very large, the compression spring that meets such a large stroke requirement is very long, the installation space is very large and there is a problem of compression stability. For this reason, three restoring force generating units 5 are used, wherein each restoring force generating unit 5 includes a group of springs 505 (including two springs), and the three restoring force generating units 5 are connected in series through a wire rope group, which is equivalent to using three groups of springs in series to share the stroke, and each group of springs provides one-third of the total stroke, which can enhance the compression stability, and the three restoring force generating units 5 are arranged circumferentially around the lower half of the gear front end flange 3 to save installation space.

[0038] When the first steel wire rope group 6 drives the first guide column end plate 503 of the left restoring force generating unit 5 to move upward, the first guide columns 11 in the three restoring force generating units 5 generate tension on the respective second spring end plates 507 through the series connection of the respective first guide columns 501, the middle second steel wire rope group 7 and the middle third steel wire rope group 8, thereby compressing the three groups of springs 505 to generate restoring force. When the first steel wire rope group 6 moves to the lower left, the first steel wire rope group 6 is prevented from loosening downward and does not generate an acting force, and the movable pulley 10 slides in the long strip sliding groove 1101 to tighten the first steel wire rope group 6. When the fourth steel wire rope group 9 drives the right restoring force generating unit 5 to move upward, through the series connection of the respective second guide columns 502, the other two groups of second steel wire rope groups 7 and the other two groups of third steel wire rope groups 8 arranged on both sides, the second guide columns 502 in the three restoring force generating units 5 generate tension on the respective first spring end plates 508, thereby compressing the three groups of springs 505 to generate restoring force. When the fourth steel wire rope group 9 moves to the lower right, the fourth steel wire rope group 9 is prevented from loosening downward and does not generate force, and the movable pulley 10 slides in the long strip sliding groove 1101 to tension the fourth steel wire 9.

[0039] In summary, the principle of the flexible wind wheel locking structure is: after the wind wheel locking pin 201 extends out to lock the wind wheel, since the outer shell of the wind wheel locking pin assembly 2 is fixedly connected to the swing trolley 1, the rotation of the wind wheel drives the wind wheel locking pin assembly 2 and the swing trolley 1 to rotate together. The swing trolley 1 can only move in the arc guide slot 4 on the front flange 3 of the gear box, thereby limiting the wind wheel to swing only within the angle range limited by the arc guide slot 4.

[0040] When the wind wheel drives the swing trolley 1 to swing to the left, the first steel wire rope group 6 on the left side is prevented from loosening. Under the action of the movable pulley 10 on the left side, the first steel wire rope group 6 is tightened, and the fourth steel wire rope group 9 on the right side is tightened, so that the second guide column 502 of the three restoring force generating units 5 is pulled out at the same time, so that the springs 505 of the three restoring force generating units 5 are compressed to generate restoring force. The larger the swing angle, the greater the restoring force generated by the springs 505 of the three restoring force generating units 5. When the wind speed becomes smaller, the rotational torque of the wind wheel becomes smaller, and the restoring force generated by the springs 505 of the three restoring force generating units 5 will pull the wind wheel back to the vertical position. When the wind wheel drives the swing trolley 1 to swing to the right, the action process is opposite, and the restoring force generated by the springs 505 of the three restoring force generating units 5 will still make the wind wheel return to the vertical position.

[0041] Example 2

[0042] See also Figure 6 As shown, the difference from Example 1 is that this embodiment only uses one wind wheel locking pin assembly 2, and the outer shell of the wind wheel locking pin assembly 2 is connected to the left end of the swing trolley 1, and is fixed as a whole. The first wire rope group 6 is connected to the outer shell of the wind wheel locking pin assembly 2, and the fourth wire rope group 9 is connected to the right end of the swing trolley 1.

[0043] Example 3

[0044] See also Figure 7 As shown, the difference from Example 1 is that this embodiment only uses one wind wheel locking pin assembly 2, and the outer shell of the wind wheel locking pin assembly 2 is connected to the right end of the swing trolley 1, and is fixed as a whole. The first wire rope group 6 is connected to the left end of the swing trolley 1, and the fourth wire rope group 9 is connected to the outer shell of the wind wheel locking pin assembly 2.

[0045] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made according to the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible wind rotor locking structure of a typhoon-resistant wind turbine generator set braking system, the braking system of the wind turbine generator set comprising a wind rotor locking disk (14), a gear box front end flange (3), and a wind rotor locking pin assembly (2), the wind rotor locking disk (14) being fixed to a hub (15) of a wind rotor by bolt connection, the gear box front end flange (3) being a part of a gear box of the wind turbine generator set, and being respectively fixed to a generator and a nacelle shell (16) of the wind turbine generator set by bolt connection, the wind rotor locking pin assembly (2) comprising a wind rotor locking pin (201) and a driving device for driving the wind rotor locking pin (201) to extend or retract, under the action of the driving device, the wind rotor locking pin (201) can extend into a locking hole on the wind rotor locking disk (14), thereby locking the wind rotor by locking the wind rotor locking disk (14); characterized in that: The flexible wind wheel locking structure comprises a swing trolley (1), a first steel wire rope group (6), a second steel wire rope group (7), a third steel wire rope group (8), a fourth steel wire rope group (9), a movable pulley (10), a first fixed pulley group (12), a second fixed pulley group (13) and three restoring force generating units (5); an arc-shaped guide rail slot hole (4) extending along its circumference is formed on the upper half of the front end flange (3) of the gear box, and the left and right parts of the arc-shaped guide rail slot hole (4) are mirror-symmetrical about the vertical center line of the front end flange (3) of the gear box; The trolley (1) is installed in the arc-shaped guide rail slot (4) and can only move in the arc-shaped guide rail slot (4); the wind wheel locking pin assembly (2) has two wind wheel locking pin assemblies (2) placed in the arc-shaped guide rail slot (4) and located on the left and right sides of the swing trolley (1); and the shells of the two wind wheel locking pin assemblies (2) are respectively connected to the left and right ends of the swing trolley (1) to form a whole, so that after the wind wheel locking pin extends out to lock the wind wheel, the rotation of the wind wheel can drive the two wind wheel locking pin assemblies (2) to move with the swing trolley (1) within the angle range limited by the arc-shaped guide rail slot (4);Three restoring force generating units (5) are distributed in the lower half of the front end flange (3) of the gear box, one of the restoring force generating units (5) is located in the middle of the bottom of the front end flange (3) of the gear box, and is centrally arranged, and the other two restoring force generating units (5) are symmetrically installed on the left and right sides of the front end flange (3) of the gear box, the restoring force generating unit (5) comprises a first guide column (501), a second guide column (502), a first guide column end plate (503), a second guide column end plate (504), a spring (505), a first spring end plate (508), a second spring end plate (507) and a frame (506), the frame (506) is fixed on the front end flange (3) of the gear box, the spring (505), the first spring end plate (508) and the second spring end plate (507) are placed in the frame (506), the first guide column (501) and the second guide column (502) are inserted into the frame (506) in parallel with each other, and the first guide column (501) ) passes through one side of the frame (506) and is connected to the first guide column end plate (503), and the other end passes through the first spring end plate (508) and is connected to the second spring end plate (507); one end of the second guide column (502) passes through the other side of the frame (506) and is connected to the second guide column end plate (504), and the other end passes through the second spring end plate (507) and is connected to the first spring end plate (508); the spring (505) has two ends located between the first spring end plate (508) and the second spring end plate (507), and are respectively mounted on the first guide column (501) and the second guide column (502), that is, one guide column is mounted with one spring, and the two ends of the spring (505) are respectively connected to the first spring end plate (508) and the second spring end plate (507); the first spring end plate (508) can slide on the first guide column (501), and the second spring end plate (507) can slide on the second guide column (502); Two movable pulley mounting frames (11) are symmetrically arranged on the left and right sides of the upper half of the front end flange (3) of the gear box. The movable pulley mounting frames (11) are close to the limit positions of the corresponding sides of the arc-shaped guide rail slot holes (4) and are formed with two mutually symmetrical and outwardly inclined long strip sliding grooves (1101). A shaft (1001) capable of sliding in the two long strip sliding grooves (1101) is passed through the two long strip sliding grooves (1101). The movable pulley (10) is mounted on the shaft (1001) and is located between the two long strip sliding grooves (1101). , and can slide with the shaft (1001) within the range defined by the long strip sliding groove (1101); the first fixed pulley group (12) is installed between the two restoring force generating units (5) arranged in the center and on the left, and the second fixed pulley group (13) is installed between the two restoring force generating units (5) arranged in the center and on the right, and the first fixed pulley group (12) and the second fixed pulley group (13) are distributed in a mirror-symmetrical manner, and each fixed pulley group is composed of three fixed pulleys arranged side by side; one end of the first steel wire rope group (6) is connected to the wind wheel locking pin group on the left side of the swing trolley (1). The second steel wire rope group (7) is fixedly connected to the housing of the component (2), and the other end of the second steel wire rope group (7) is downwardly passed around the movable pulley (10) on the movable pulley mounting frame (11) on the left side and then connected to the first guide column end plate (503) of the restoring force generating unit (5) on the left side; the second steel wire rope group (7) has three groups of three fixed pulleys corresponding to the first fixed pulley group (12), and one end of the middle second steel wire rope group (7) passes through the second guide column end plate (504) and one side of the frame (506) of the restoring force generating unit (5) on the left side in sequence and then is connected to the second spring end plate (507) of the restoring force generating unit (5). ), the other end of which is connected to the first guide column end plate (503) of the restoring force generating unit (5) in the middle after passing downwards around the fixed pulley in the middle of the first fixed pulley group (12); one end of the other two groups of second steel wire rope groups (7) is connected to the second guide column end plate (504) of the restoring force generating unit (5) on the left, and the other end of which is connected to the first spring end plate (508) of the restoring force generating unit (5) after passing downwards around the two corresponding fixed pulleys of the first fixed pulley group (12) and passing through one side of the frame (506) of the restoring force generating unit (5) in the middle;The third steel wire rope group (8) has three groups of three fixed pulleys corresponding to the second fixed pulley group (13). The middle group of the third steel wire rope group (8) passes through the second guide column end plate (504) and one side of the frame (506) of the central restoring force generating unit (5) in sequence and is then connected to the second spring end plate (507) of the restoring force generating unit (5). The other end passes around the middle fixed pulley of the second fixed pulley group (13) and is then connected upward to the first guide column end plate (503) of the right restoring force generating unit (5). One end of the other two groups of the third steel wire rope groups (8) is connected to the central restoring force generating unit (5). The fourth steel wire rope group (9) is connected to the second guide column end plate (504) of the unit (5), and the other end of the fourth steel wire rope group (9) is connected to the first spring end plate (508) of the restoring force generating unit (5) by passing through the two corresponding fixed pulleys of the first fixed pulley group (12) and then passing through the frame (506) of the right restoring force generating unit (5) upward; one end of the fourth steel wire rope group (9) is fixedly connected to the outer shell of the wind wheel locking pin assembly (2) on the right side of the swing trolley (1), and the other end of the fourth steel wire rope group (9) is connected to the second guide column end plate (504) of the right restoring force generating unit (5) by passing through the movable pulley (10) on the movable pulley mounting frame (11) on the right side downward.

2. The flexible wind wheel locking structure of the typhoon-resistant wind turbine generator braking system according to claim 1 is characterized in that: The swing trolley (1) adopts double-layer double-row conical rolling wheels and can withstand the additional bending moment generated on the wind wheel locking pin assembly.

3. The flexible wind wheel locking structure of the typhoon-resistant wind turbine generator braking system according to claim 1 is characterized in that: Buffers are installed at the extreme positions of both ends of the arc-shaped guide rail slot (4) to reduce the impact force generated when the wind wheel locking assembly (2) swings to the extreme position.

4. The flexible wind wheel locking structure of the typhoon-resistant wind turbine generator braking system according to claim 1 is characterized in that: The two wind wheel locking pin assemblies (2) are spaced 60 degrees apart.

5. A flexible wind rotor locking structure of a typhoon-resistant wind turbine generator set braking system, the braking system of the wind turbine generator set comprising a wind rotor locking disk (14), a gear box front end flange (3), and a wind rotor locking pin assembly (2), the wind rotor locking disk (14) being fixed to a hub (15) of a wind rotor by bolt connection, the gear box front end flange (3) being a part of a gear box of the wind turbine generator set, and being respectively fixed to a generator and a nacelle casing (16) of the wind turbine generator set by bolt connection, the wind rotor locking pin assembly (2) comprising a wind rotor locking pin (201) and a driving device for driving the wind rotor locking pin (201) to extend or retract, under the action of the driving device, the wind rotor locking pin (201) can extend into a locking hole on the wind rotor locking disk (14), thereby locking the wind rotor by locking the wind rotor locking disk (14); characterized in that: The flexible wind wheel locking structure comprises a swinging trolley (1), a first steel wire rope group (6), a second steel wire rope group (7), a third steel wire rope group (8), a fourth steel wire rope group (9), a movable pulley (10), a first fixed pulley group (12), a second fixed pulley group (13) and three restoring force generating units (5); an arc-shaped guide rail slot hole (4) extending along its circumference is formed on the upper half of the front end flange (3) of the gear box, and the left and right parts of the arc-shaped guide rail slot hole (4) are mirror-imaged with respect to the vertical center line of the front end flange (3) of the gear box. The swing trolley (1) is installed in the arc-shaped guide rail slot (4) and can only move in the arc-shaped guide rail slot (4); one of the wind wheel locking pin assemblies (2) is placed in the arc-shaped guide rail slot (4) and is located on the left side of the swing trolley (1); and the outer shell of the wind wheel locking pin assembly (2) is connected to the left end of the swing trolley (1) to form a whole, so that after the wind wheel locking pin extends out to lock the wind wheel, the rotation of the wind wheel can drive the wind wheel locking pin assembly (2) to move with the swing trolley (1) within the angle range limited by the arc-shaped guide rail slot (4);Three restoring force generating units (5) are distributed in the lower half of the front end flange (3) of the gear box, one of the restoring force generating units (5) is located in the middle of the bottom of the front end flange (3) of the gear box, and is centrally arranged, and the other two restoring force generating units (5) are symmetrically installed on the left and right sides of the front end flange (3) of the gear box, the restoring force generating unit (5) comprises a first guide column (501), a second guide column (502), a first guide column end plate (503), a second guide column end plate (504), a spring (505), a first spring end plate (508), a second spring end plate (507) and a frame (506), the frame (506) is fixed on the front end flange (3) of the gear box, the spring (505), the first spring end plate (508) and the second spring end plate (507) are placed in the frame (506), the first guide column (501) and the second guide column (502) are inserted into the frame (506) in parallel with each other, and the first guide column (501) ) passes through one side of the frame (506) and is connected to the first guide column end plate (503), and the other end passes through the first spring end plate (508) and is connected to the second spring end plate (507); one end of the second guide column (502) passes through the other side of the frame (506) and is connected to the second guide column end plate (504), and the other end passes through the second spring end plate (507) and is connected to the first spring end plate (508); the spring (505) has two ends located between the first spring end plate (508) and the second spring end plate (507), and are respectively mounted on the first guide column (501) and the second guide column (502), that is, one guide column is mounted with one spring, and the two ends of the spring (505) are respectively connected to the first spring end plate (508) and the second spring end plate (507); the first spring end plate (508) can slide on the first guide column (501), and the second spring end plate (507) can slide on the second guide column (502); Two symmetrically distributed movable pulley mounting frames (11) are formed on the left and right sides of the upper half of the front end flange (3) of the gear box. The movable pulley mounting frames (11) are close to the limit positions of the corresponding sides of the arc-shaped guide rail slot holes (4) and are formed with two mutually symmetrical, outwardly oblique and downwardly inclined long strip sliding grooves (1101). A shaft (1001) capable of sliding in the two long strip sliding grooves (1101) is passed through the two long strip sliding grooves (1101). The movable pulley (10) is assembled on the shaft (1001) and is located in the two long strip sliding grooves (1101). ), and can slide with the shaft (1001) within the range defined by the long strip sliding groove (1101); the first fixed pulley group (12) is installed between the two restoring force generating units (5) arranged in the center and on the left, and the second fixed pulley group (13) is installed between the two restoring force generating units (5) arranged in the center and on the right, and the first fixed pulley group (12) and the second fixed pulley group (13) are distributed in a mirror-symmetrical manner, and each fixed pulley group is composed of three fixed pulleys arranged side by side; one end of the first wire rope group (6) is connected to the wind wheel locking pin assembly (2); The outer shell is fixedly connected, and the other end of the second steel wire rope group (7) is downwardly passed around the movable pulley (10) on the movable pulley mounting frame (11) on the left side and then connected to the first guide column end plate (503) of the restoring force generating unit (5) on the left side; the second steel wire rope group (7) has three groups of three fixed pulleys corresponding to the first fixed pulley group (12), and one end of the middle second steel wire rope group (7) passes through the second guide column end plate (504) and one side of the frame (506) of the restoring force generating unit (5) on the left side in sequence and then is connected to the second spring end plate (507) of the restoring force generating unit (5). , the other end of the second steel wire rope group (7) is passed downward around the fixed pulley in the middle of the first fixed pulley group (12) and then connected to the first guide column end plate (503) of the center restoring force generating unit (5); one end of the other two groups of second steel wire rope groups (7) is connected to the second guide column end plate (504) of the restoring force generating unit (5) on the left, and the other end of the second steel wire rope group (7) is passed downward around the corresponding two fixed pulleys of the first fixed pulley group (12) and then passed through one side of the frame (506) of the center restoring force generating unit (5) and connected to the first spring end plate (508) of the restoring force generating unit (5);The third steel wire rope group (8) has three groups of three fixed pulleys corresponding to the second fixed pulley group (13). The middle group of the third steel wire rope group (8) passes through the second guide column end plate (504) and one side of the frame (506) of the central restoring force generating unit (5) in sequence and is then connected to the second spring end plate (507) of the restoring force generating unit (5). The other end passes around the middle fixed pulley of the second fixed pulley group (13) and is then connected upward to the first guide column end plate (503) of the right restoring force generating unit (5). One end of the other two groups of the third steel wire rope groups (8) is connected to the central one. The fourth steel wire rope group (9) is connected to the second guide column end plate (504) of the restoring force generating unit (5), and the other end of the fourth steel wire rope group (9) is connected to the first spring end plate (508) of the restoring force generating unit (5) by passing through the two corresponding fixed pulleys of the first fixed pulley group (12) and then passing through the frame (506) of the right restoring force generating unit (5) upward; one end of the fourth steel wire rope group (9) is fixedly connected to the right end of the swing trolley (1), and the other end of the fourth steel wire rope group (9) is connected to the second guide column end plate (504) of the right restoring force generating unit (5) by passing through the movable pulley (10) on the movable pulley mounting frame (11) on the right downward; 6. The flexible wind wheel locking structure of the typhoon-resistant wind turbine generator braking system according to claim 5 is characterized in that: The swing trolley (1) adopts double-layer double-row conical rolling wheels and can withstand the additional bending moment generated on the wind wheel locking pin assembly.

7. The flexible wind wheel locking structure of the typhoon-resistant wind turbine generator braking system according to claim 5 is characterized in that: Buffers are installed at the extreme positions of both ends of the arc-shaped guide rail slot (4) to reduce the impact force generated when the wind wheel locking assembly (2) swings to the extreme position.

8. A flexible wind rotor locking structure of a typhoon-resistant wind turbine generator set braking system, the braking system of the wind turbine generator set comprising a wind rotor locking disk (14), a gear box front end flange (3), and a wind rotor locking pin assembly (2), the wind rotor locking disk (14) being fixed to a hub (15) of a wind rotor by bolt connection, the gear box front end flange (3) being a part of a gear box of the wind turbine generator set, and being respectively fixed to a generator and a nacelle casing (16) of the wind turbine generator set by bolt connection, the wind rotor locking pin assembly (2) comprising a wind rotor locking pin (201) and a driving device for driving the wind rotor locking pin (201) to extend or retract, under the action of the driving device, the wind rotor locking pin (201) can extend into a locking hole on the wind rotor locking disk (14), thereby locking the wind rotor by locking the wind rotor locking disk (14); characterized in that: The flexible wind wheel locking structure comprises a swinging trolley (1), a first steel wire rope group (6), a second steel wire rope group (7), a third steel wire rope group (8), a fourth steel wire rope group (9), a movable pulley (10), a first fixed pulley group (12), a second fixed pulley group (13) and three restoring force generating units (5); an arc-shaped guide rail slot hole (4) extending along its circumference is formed on the upper half of the front end flange (3) of the gear box, and the left and right parts of the arc-shaped guide rail slot hole (4) are mirror-imaged with respect to the vertical center line of the front end flange (3) of the gear box. The swing trolley (1) is installed in the arc-shaped guide rail slot (4) and can only move in the arc-shaped guide rail slot (4); one of the wind wheel locking pin assemblies (2) is placed in the arc-shaped guide rail slot (4) and is located on the right side of the swing trolley (1); and the outer shell of the wind wheel locking pin assembly (2) is connected to the right end of the swing trolley (1) to form a whole, so that after the wind wheel locking pin extends out to lock the wind wheel, the rotation of the wind wheel can drive the wind wheel locking pin assembly (2) to move with the swing trolley (1) within the angle range limited by the arc-shaped guide rail slot (4);Three restoring force generating units (5) are distributed in the lower half of the front end flange (3) of the gear box, one of the restoring force generating units (5) is located in the middle of the bottom of the front end flange (3) of the gear box, and is centrally arranged, and the other two restoring force generating units (5) are symmetrically installed on the left and right sides of the front end flange (3) of the gear box, the restoring force generating unit (5) comprises a first guide column (501), a second guide column (502), a first guide column end plate (503), a second guide column end plate (504), a spring (505), a first spring end plate (508), a second spring end plate (507) and a frame (506), the frame (506) is fixed on the front end flange (3) of the gear box, the spring (505), the first spring end plate (508) and the second spring end plate (507) are placed in the frame (506), the first guide column (501) and the second guide column (502) are inserted into the frame (506) in parallel with each other, and the first guide column (501) ) passes through one side of the frame (506) and is connected to the first guide column end plate (503), and the other end passes through the first spring end plate (508) and is connected to the second spring end plate (507); one end of the second guide column (502) passes through the other side of the frame (506) and is connected to the second guide column end plate (504), and the other end passes through the second spring end plate (507) and is connected to the first spring end plate (508); the spring (505) has two ends located between the first spring end plate (508) and the second spring end plate (507), and are respectively mounted on the first guide column (501) and the second guide column (502), that is, one guide column is mounted with one spring, and the two ends of the spring (505) are respectively connected to the first spring end plate (508) and the second spring end plate (507); the first spring end plate (508) can slide on the first guide column (501), and the second spring end plate (507) can slide on the second guide column (502); Two symmetrically distributed movable pulley mounting frames (11) are formed on the left and right sides of the upper half of the front end flange (3) of the gear box. The movable pulley mounting frames (11) are close to the limit positions of the corresponding sides of the arc-shaped guide rail slot holes (4) and are formed with two mutually symmetrical, outwardly oblique and downwardly inclined long strip sliding grooves (1101). A shaft (1001) capable of sliding in the two long strip sliding grooves (1101) is passed through the two long strip sliding grooves (1101). The movable pulley (10) is assembled on the shaft (1001) and is located in the two long strip sliding grooves (1101). 1), and can slide with the shaft (1001) within the range defined by the long strip sliding groove (1101); the first fixed pulley group (12) is installed between the two restoring force generating units (5) arranged in the middle and on the left, and the second fixed pulley group (13) is installed between the two restoring force generating units (5) arranged in the middle and on the right, and the first fixed pulley group (12) and the second fixed pulley group (13) are distributed in a mirror-symmetrical manner, and each fixed pulley group is composed of three fixed pulleys arranged side by side; one end of the first wire rope group (6) is fixed to the left end of the swing trolley The second steel wire rope group (7) is connected to the first guide column end plate (503) of the restoring force generating unit (5) on the left side, and the other end of the steel wire rope group (7) is connected to the first guide column end plate (503) of the restoring force generating unit (5) on the left side after passing through the movable pulley mounting frame (11) on the left side. The second steel wire rope group (7) has three groups of three fixed pulleys corresponding to the first fixed pulley group (12). One end of the middle second steel wire rope group (7) passes through the second guide column end plate (504) and one side of the frame (506) of the restoring force generating unit (5) on the left side in sequence, and is connected to the second spring end plate (507) of the restoring force generating unit (5). The other end passes downward around the fixed pulley in the middle of the first fixed pulley group (12) and is connected to the first guide column end plate (503) of the restoring force generating unit (5) in the middle. One end of the other two groups of second steel wire rope groups (7) are connected to the second guide column end plate (504) of the restoring force generating unit (5) on the left, and the other end passes downward around the corresponding two fixed pulleys of the first fixed pulley group (12) and passes through one side of the frame (506) of the restoring force generating unit (5) in the middle and is connected to the first spring end plate (508) of the restoring force generating unit (5);The third steel wire rope group (8) has three groups of three fixed pulleys corresponding to the second fixed pulley group (13). The middle group of the third steel wire rope group (8) passes through the second guide column end plate (504) and one side of the frame (506) of the central restoring force generating unit (5) in sequence and is then connected to the second spring end plate (507) of the restoring force generating unit (5). The other end passes around the middle fixed pulley of the second fixed pulley group (13) and is then connected upward to the first guide column end plate (503) of the right restoring force generating unit (5). One end of the other two groups of the third steel wire rope groups (8) is connected to the central restoring force generating unit (5). The fourth steel wire rope group (9) is connected to the second guide column end plate (504) of the restoring force generating unit (5), and the other end of the fourth steel wire rope group (9) is connected to the first spring end plate (508) of the restoring force generating unit (5) by passing through the two corresponding fixed pulleys of the first fixed pulley group (12) and then passing through the frame (506) of the right restoring force generating unit (5) on the upper side; one end of the fourth steel wire rope group (9) is fixedly connected to the outer shell of the wind wheel locking pin assembly (2), and the other end of the fourth steel wire rope group (9) is connected to the second guide column end plate (504) of the right restoring force generating unit (5) by passing through the movable pulley (10) on the movable pulley mounting frame (11) on the upper side.

9. The flexible wind wheel locking structure of the typhoon-resistant wind turbine generator braking system according to claim 8 is characterized in that: The swing trolley (1) adopts double-layer double-row conical rolling wheels and can withstand the additional bending moment generated on the wind wheel locking pin assembly.

10. The flexible wind wheel locking structure of the typhoon-resistant wind turbine generator braking system according to claim 8 is characterized in that: Buffers are installed at the extreme positions of both ends of the arc-shaped guide rail slot (4) to reduce the impact force generated when the wind wheel locking assembly (2) swings to the extreme position.

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