CN111608872A - Flexible wind rotor locking device for typhoon-resistant wind turbine braking system - Google Patents

Abstract

The present invention discloses a flexible wind wheel locking device for a typhoon-resistant wind turbine generator braking system, which adopts a flexible wind wheel locking design scheme, including a swinging trolley and two flexible wind wheel locking units; the two flexible wind wheel locking units are symmetrically distributed on the left and right sides of the front flange of the gear box, and are connected to the left and right ends of the swinging trolley; the swinging trolley and the outer shell of the wind wheel locking pin assembly of the braking system are integrally formed, and can move in the arc-shaped guide rail slot of the front flange of the gear box, drive the steel wire rope group on the left or right side to tighten, and at the same time drive the guide column in the flexible wind wheel locking unit on one side to be pulled out, so that the spring set on the guide column is compressed, thereby providing a restoring force for the wind wheel. The present invention allows the wind wheel to swing within a certain angle, and the greater the angle deviates from the positive "Y" position, the greater the restoring force, which can greatly reduce the load of the wind wheel and the whole machine, and greatly reduce the overall design difficulty of the wind turbine generator set.

Description

Flexible wind rotor locking device for typhoon-resistant wind turbine braking system

technical field

The invention relates to the technical field of braking system design for typhoon-resistant wind power generator sets, in particular to a flexible wind wheel locking device for a typhoon-resistant wind power generator set braking system. The wheel can only oscillate within a certain angular range along the transmission axis and provide suitable torsional rigidity.

Background technique

As is known in the industry, for megawatt three-blade typhoon-resistant wind turbines, pitch control is generally used to feather the three blades, and the wind rotor rotates freely to avoid excessive load on the whole machine. For the three-blade anti-typhoon wind turbine, after feathering the three blades, the wind rotor needs to be locked in the 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 varies at different angular positions. 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 varies. The load 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 the typhoon-resistant wind turbine in the downwind direction. Release or completely lock the wind rotor, so that the load of the whole machine is very large under the typhoon limit wind speed. In addition, for the design of the three-blade anti-typhoon wind turbine in the downwind direction, the wind rotor is free to rotate without load to resist the typhoon, and the load of the wind rotor will increase. Very big.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art. Aiming at the problem that the existing typhoon-resistant wind power generator set completely locks or completely releases the wind rotor, resulting in a large load of the whole set, a kind of anti-typhoon wind power generator set is proposed. The flexible wind wheel locking device of the braking system adopts a flexible wind wheel locking design scheme, which allows the wind wheel to swing within a certain angle and provides a restoring force to the wind wheel. The greater the angle deviates from the positive "Y" position, the greater the restoring force. , which can greatly reduce the load of the wind turbine and the whole machine, and greatly reduce the overall design difficulty of the wind turbine.

In order to achieve the above purpose, the technical solution provided by the present invention is: a flexible wind wheel locking device for a braking system of an anti-typhoon wind power generating set, the braking system of the wind power generating set includes a wind wheel locking disc, a gear box front end method. The flange and the rotor locking pin assembly, the rotor locking disc and the hub of the wind rotor are connected and fixed by bolts, and the front flange of the gearbox is a part of the gearbox of the wind turbine, which is respectively connected with the generator and the wind turbine of the wind turbine. The casing of the nacelle is fixed by bolt connection, and the wind wheel locking pin assembly includes a wind wheel locking pin and a driving device for driving the wind wheel locking pin to extend or retract. Under the action of the driving device, the wind wheel locking pin can extend. into the locking hole on the locking plate of the wind wheel, thereby locking the wind wheel by locking the locking plate of the wind wheel; the flexible wind wheel locking device includes a swing trolley and two flexible wind wheel locking units; wherein, the gear box The upper half of the front flange is formed with an arc guide slot extending along its circumference, and the left and right parts of the arc guide slot are mirror-symmetrical with respect to the vertical centerline of the front flange of the gearbox The swinging trolley is installed in the arc-shaped guide rail slot and can only move in the arc-shaped guide slot. The left and right sides, and the casings of the two wind wheel locking pin assemblies are respectively connected with the left and right ends of the swing trolley, and are fixed as a whole, so that after the wind wheel locking pin extends to lock the wind wheel, the wind wheel is locked. The rotation can drive the two wind wheel locking pin assemblies to move with the swinging trolley within the angular range limited by the arc-shaped guide rail slot; the two flexible wind wheel locking units are symmetrically distributed on the left and right sides of the front flange of the gearbox, and correspond to Two wind wheel locking pin assemblies, that is, one wind wheel locking pin assembly is matched with a flexible wind wheel locking unit; the flexible wind wheel locking unit includes a wire rope group, a fixed pulley, a movable pulley, a guide column, a support seat, a first spring, a spacer plate, the second spring, the spring end plate and the guide column end plate, the support seat is fixed on the lower half of the front end flange of the gearbox, the fixed pulley is fixed on the front end flange of the gearbox, and is located in the arc guide groove Between the hole and the support seat, the movable pulley is placed between the fixed pulley and the support seat, and is installed on the top of the guide column. It is then fixedly connected to the end plate of the guide column. The end plate of the guide column prevents the guide column from separating from the end plate of the spring. The first spring is placed between the support seat and the partition plate, and is sleeved on the guide column. The support base is connected with the partition plate, the second spring is placed between the partition plate and the spring end plate, and is sleeved on the guide column, and its two ends are respectively connected with the partition plate and the spring end plate, the partition plate and the spring end plate are respectively connected. The plate can slide on the guide column, one end of the wire rope group is fixedly connected with the casing of the corresponding wind wheel locking pin assembly, and the other end of the wire rope group is connected downward to the fixed pulley and the movable pulley in turn, and then upwardly connected to the front flange of the gearbox, and is close to the front end flange of the gearbox. For the fixed pulley, the wire rope group is tensioned by the gravity of the guide column and the end plate of the guide column.

Further, the space distance between the support base and the movable pulley is greater than the total stroke of the first spring and the second spring, so that when the movable pulley moves downward, the wire rope group is always tensioned.

Further, between the support base and the partition plate and between the partition plate and the spring end plate, a spring not sleeved on the guide post is connected to increase the restoring force.

Further, the swing trolley adopts a double-layer double-row conical rolling wheel, which can withstand the additional bending moment generated on the locking pin assembly of the wind wheel.

Further, 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 rotor locking assembly swings to the extreme position; and the two rotor locking pin assemblies are separated by 60°.

Another technical solution provided by the present invention is: a flexible wind rotor locking device used for a braking system of an anti-typhoon wind turbine, the braking system of the wind turbine includes a rotor locking disc, a front end flange of a gearbox, Wind wheel locking pin assembly, the wind wheel locking disc and the hub of the wind wheel are connected and fixed by bolts, the front end flange of the gearbox is a part of the gearbox of the wind turbine, which is respectively connected with the generator of the wind turbine and the nacelle shell By bolting and fixing, the wind wheel locking pin assembly includes a wind wheel locking pin and a driving device for driving the wind wheel locking pin to extend or retract. Under the action of the driving device, the wind wheel locking pin can extend into the wind. lock the wind wheel by locking the wind wheel locking plate; the flexible wind wheel locking device includes a swing trolley and two flexible wind wheel locking units; wherein, the front end method of the gearbox The upper part of the flange is formed with an arc-shaped guide rail slot extending along its circumferential direction, and the left and right parts of the arc-shaped guide slot hole are mirror-symmetrical with respect to the vertical centerline of the front flange of the gearbox; The swinging trolley is installed in the slotted hole of the arc-shaped guide rail and can only move in the slotted hole of the arc-shaped guide rail. The locking pin assembly of the wind wheel is placed in the slotted hole of the arc-shaped guide rail and is located on one side of the swinging trolley, and The casing of the wind wheel locking pin assembly is connected with one end of the swing trolley and is fixed as a whole, so that after the wind wheel locking pin extends to lock the wind wheel, the rotation of the wind wheel can drive the wind wheel locking pin assembly to follow the swing car in the arc The two flexible wind wheel locking units are symmetrically distributed on the left and right sides of the front flange of the gearbox; the flexible wind wheel locking unit includes a wire rope group, a fixed pulley, a movable pulley, a guide Column, support seat, first spring, partition plate, second spring, spring end plate and guide column end plate, the support seat is fixed to the lower half of the front end flange of the gearbox, and the fixed pulley is fixed to the front end of the gearbox on the flange, and between the slotted hole of the arc guide rail and the support seat, the movable pulley is placed between the fixed pulley and the support seat, and is installed on the top of the guide column, and the bottom of the guide column passes vertically downward in sequence. After passing through the support seat, the partition plate and the spring end plate, it is fixedly connected to the end plate of the guide column, and the end plate of the guide column prevents the guide column from separating from the end plate of the spring. On the guide column, its two ends are respectively connected with the support seat and the baffle plate, the second spring is placed between the baffle plate and the spring end plate, and is sleeved on the guide column, and its two ends are respectively connected with the baffle plate and the spring end plate. Plate connection, the partition plate and the spring end plate can slide on the guide column; one end of the wire rope group of one flexible wind wheel locking unit is fixedly connected with the casing of the wind wheel locking pin assembly, and the other end is downwardly wound around the fixed pulley and the The movable pulley is connected to the front end flange of the gearbox and is close to the fixed pulley, and the wire rope group is tightened by the gravity of the guide column and the end plate of the guide column; One end is connected, and the other end of the steel wire rope group is downwardly connected to the fixed pulley and the movable pulley, and then upwardly connected to the front end flange of the gearbox, and is close to the fixed pulley.

Further, the space distance between the support base and the movable pulley is greater than the total stroke of the first spring and the second spring, so that when the movable pulley moves downward, the wire rope group is always tensioned.

Further, between the support base and the partition plate and between the partition plate and the spring end plate, a spring not sleeved on the guide post is connected to increase the restoring force.

Further, the swing trolley adopts a double-layer double-row conical rolling wheel, which can withstand the additional bending moment generated on the locking pin assembly of the wind wheel.

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

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

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 to the wind wheel. The greater the angle deviates from the positive "Y" position, the greater the restoring force. In the anti-typhoon condition, before the typhoon arrives, lock the wind rotor in the positive "Y" position where the force on the blade is the least, allowing the wind rotor to swing at a certain angle such as ±27° after the typhoon, and the wind rotor is blown away from the positive "Y" by the typhoon. ” position, when the wind force decreases, the wind rotor can return to the positive “Y” position, that is, the position with the smallest load, thereby significantly reducing the overall load of the machine under typhoon conditions.

2. Since the flexible wind rotor locking device of the present invention is related to the operation safety of the wind turbine, high reliability is required; therefore, the present invention adopts the mechanical structure of the combination of the spring and the wire rope group to realize the flexible wind rotor locking function, avoiding the use of complicated The electrical and hydraulic devices, that is, without complex electrical and hydraulic structures, have very high reliability.

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

4. The present invention provides an effective solution for reducing the design load of the three-blade anti-typhoon unit in the downwind direction by reducing the locking stiffness of the wind rotor.

5. Since the present invention is directly locked on the hub side of the wind rotor and does not pass through the gearbox of the wind turbine, it will not cause damage to the gearbox, thereby improving the reliability of the unit.

Description of drawings

FIG. 1 is a schematic view of the installation of the flexible wind wheel locking device in Embodiment 1. FIG.

FIG. 2 is a front view of the flexible wind wheel locking device in Embodiment 1. FIG.

FIG. 3 is an axial view of the flexible wind wheel locking device in Embodiment 1. FIG.

4 is a cross-sectional view of the swing trolley in Embodiment 1 after being installed in the slotted hole of the arc guide rail.

FIG. 5 is a front view of the flexible wind wheel locking device in Embodiment 2. FIG.

Detailed ways

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

Example 1

The flexible wind rotor locking device provided in this embodiment is mainly used for the braking system of the anti-typhoon wind turbine. The rotor locking pin assembly 2, the rotor locking disc 6 and the hub 8 of the rotor (not shown in the figure) are fixed by bolt connection, and the front flange 3 of the gearbox is a part of the gearbox of the wind turbine, which is The wind turbine generator (not shown in the figure) and the nacelle casing 7 are respectively connected and fixed by bolts. The wind rotor locking pin assembly 2 includes a wind rotor locking pin 201 and is used to drive the wind rotor locking pin 201 to extend. Or retract the drive device (not shown in the figure), when it is necessary to lock the wind wheel, first make the locking hole on the wind wheel locking plate 6 align with the wind wheel locking pin 201, and then the wind wheel locking pin 201 extends into the wind The lock hole on the wheel locking disc 6, so that the wind wheel is locked by locking the wind wheel locking disc 6, so that the flexible wind wheel locking device works.

Referring to FIGS. 1 to 3 , the flexible wind wheel locking device described in this embodiment includes a swing trolley 1 and two flexible wind wheel locking units 5 ; wherein, the upper half of the flange 3 at the front end of the gear box is formed There is an arc-shaped guide rail slot 4 extending along its circumferential direction, and the left and right parts of the arc-shaped guide rail slot 4 are mirror-symmetrical with respect to the vertical centerline of the front flange 3 of the gearbox; the swing trolley 1 is installed in the arc guide slot 4 and can only move in the arc guide slot 4. The wind wheel locking pin assembly 2 has two placed in the arc guide slot 4 and is located in the swing trolley 1. The left and right sides of the two wind wheel locking pin assemblies 2 are connected to the left and right ends of the swing trolley 1 respectively, and are fixed as a whole, so that after the wind wheel locking pin 201 extends 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 cart 1 within the angular range limited by the arc guide slot 4, and buffers are installed at the extreme positions of both ends of the arc guide slot 4. (according to the shape of the slotted hole 4 of the curved guide rail, a customized rubber pad or rubber spring is used to buffer the swing of the wind wheel locking assembly 2 to the limit position. Of course, other elastic materials or spring-type buffers can also be used). In order to reduce the impact force generated when the wind wheel locking assembly 2 swings to the limit position; two flexible wind wheel locking units 5 are symmetrically distributed on the left and right sides of the front flange of the gearbox, and correspond to the two wind wheel locking pin assemblies 2, that is, a wind wheel locking pin assembly 2 is matched with a flexible wind wheel locking unit 5; the flexible wind wheel locking unit 5 includes a wire rope group 501, a fixed pulley 502, a movable pulley 503, a guide column 504, a support seat 505, a first spring 506, the partition plate 507, the second spring 508, the spring end plate 509 and the guide column end plate 510, the support seat 505 is fixed to the lower half of the front end flange 3 of the gearbox, and the fixed pulley 502 is fixed to the front end of the gearbox on the flange 3 and between the arc-shaped guide rail slot 4 and the support seat 505, the movable pulley 503 is placed between the fixed pulley 502 and the support seat 505, and is installed on the top of the guide column 504, the guide column 504 The bottom of the guide column vertically downward passes through the support seat 505, the partition plate 507, and the spring end plate 509 and is fixedly connected to the guide column end plate 510. The guide column end plate 510 prevents the guide column 504 from separating from the spring end plate 509. The first spring 506 is placed between the support seat 505 and the partition plate 507, and is sleeved on the guide column 504, and its two ends are respectively connected with the support seat 505 and the partition plate 507, and the second spring 508 is placed between the partition plate 507 and the partition plate 507. Between the spring end plates 509, and sleeved on the guide column 504, its two ends are respectively connected with the partition plate 507 and the spring end plate 509, between the support seat 505 and the partition plate 507 and between the partition plate 507 and the spring end plate 509. There is also a spring 511 that is not sleeved on the guide column 504 to increase the restoring force; the partition plate 507 and the spring end plate 509 can slide on the guide column 504, and one end of the wire rope group 501 is connected to the corresponding wind wheel. Housing of locking pin assembly 2 The other end of the fixed pulley 502 and the movable pulley 503 are connected downward in turn, and then upwardly connected to the front end flange 3 of the gearbox, and is close to the fixed pulley 502 . The wire rope group 501 is tightened by the gravity of the guide column 504 and the end plate 510 of the guide column, and the space distance between the support base 507 and the movable pulley 503 is greater than the total stroke of the first spring 506 and the second spring 508, so that the movable pulley 503 When moving downward, the wire rope set 501 is always tensioned.

Since the supports of all components of the flexible wind wheel locking device are arranged on the flange 3 at the front end of the gearbox, the structure and size of the flange need to be designed according to the installation and bearing requirements. In addition, the angle range of the arc guide slot 4 is determined according to the design requirements, generally to meet the swing stroke requirement of ±30° for the locking of the wind wheel, and the arc guide surface needs to be surface-hardened.

The two rotor locking pin assemblies 2 need to be separated by 60° to meet the requirements of different locking states of one blade horizontally or vertically. In addition, the size of the lock pin of the wind wheel is designed according to the limit locking torque, and the driving device of the lock pin of the wind wheel can be manual or electric. Since the wind wheel locking pin assembly 2 needs to swing together with the swing trolley 1, the electric device needs to add a rotary retractable or swing retractable device for the cable. A limiting device can be added to the wind rotor locking pin assembly 2, and under maintenance conditions, the wind rotor can be locked with the limiting device, so that the wind rotor is completely locked. The limiting device of the wind wheel locking assembly 2 can be a bolt type or a locking hole is opened at the rear of the assembly, and a locking pin device fixed on the flange 3 at the front end of the gearbox is connected in series for locking.

Referring to FIG. 4 , the support shaft 101 and the bracket 102 of the swing trolley 1 are designed according to the 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 adopts Supported by ball bearings or roller bearings, that is to say, double-layer double-row conical rolling is adopted. The swing trolley 1 can also increase the radial rolling wheel to bear radial force. The conical rolling wheel 103 can also be designed as a cylindrical or spherical roller to match the shape of the guide rail. Withstands bending moments and radial and axial forces. In addition, the swing trolley 1 needs to bear 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 bear the additional bending moment and radial and axial forces.

The number of wire ropes in the wire rope group is determined according to the design requirements: the design of the wire rope should take a safety factor of more than 5 times, which can be determined by using wire ropes with a small number of large diameters or a large number of small diameters, combined with the installation space requirements. The steel wire rope needs to consider the anti-corrosion requirements of the offshore environment, and the steel wire rope of stainless steel material is preferred. The pulley design meets the requirements of wire rope support and load transmission, and the pulley diameter conforms to the design specifications of the lifting industry. In principle, any spring type that meets both bearing capacity and travel requirements can be selected to form a spring. Due to the limited load-carrying capacity of the tension spring and the low connection reliability, it is necessary to use a compression spring to form a spring. The circular section cylindrical helical compression spring is preferred, and the number of springs is determined according to the bearing capacity requirements. Rectangular and other non-circular cross-section cylindrical coil springs can also be used, and combined springs can also be used to improve the load-carrying capacity. Special-shaped springs or combination springs of different types of springs can be selected according to the requirements of the stiffness curve.

Due to the large swing arc length of the rotor locking pin assembly 2, the compression spring that meets the requirement of such a large stroke is very long, occupies a large installation space and has problems of compression stability. To this end, it is necessary to use a movable pulley 503 in the flexible wind wheel locking unit 5 to halve the stroke, and simultaneously use two compression springs in series to meet the stroke requirements.

When the wind wheel drives the swing trolley 1 to swing to the left, in the flexible wind wheel locking unit 5 on the left, the wire rope group 501 is tightened by the gravity of the guide column 504 and the end plate 510 of the guide column, and the wire rope group 501 is tightened between the support base 505 and the movable pulley 503 A space distance larger than the strokes of the first spring 506 and the second spring 508 is left between, so that when the movable pulley 503 moves downward, the wire rope group 501 is always tensioned, and the guide post 504 drives the guide post end plate 510 to disengage from the spring end plate 509. open, no force is generated. At the same time, the wire rope group 501 of the right flexible wind wheel locking unit 5 is pulled upward, and the right guide post 504 is pulled out, so that the first spring 506, the second spring 508 and the The spring 511 is compressed to generate a restoring force.

To sum up, the principle of the flexible wind wheel locking device is: after the wind wheel locking pin 201 extends to lock the wind wheel, since the outer casing of the wind wheel locking pin assembly 2 is fixedly connected with the swing trolley 1, the rotation of the wind wheel drives the wind wheel to lock The pin assembly 2 and the swing trolley 1 rotate together. The swing trolley 1 can only move in the arc guide slot 4 on the front flange 3 of the gearbox, so that the wind wheel can only be swung within the angular range limited by the arc guide slot 4 .

When the wind wheel drives the swing trolley 1 to swing to the left, the wire rope group 501 of the flexible wind wheel locking unit 5 on the left is prevented from loosening. The wire rope group 501 of the wind wheel locking unit 5 is tightened, so that the guide post 504 on the right side is pulled out, so that the first spring 506, the second spring 508 and the spring 511 on the right side are compressed to generate restoring force. The greater the swing angle, the greater the restoring force generated by the spring. When the wind speed decreases, the rotational torque of the wind rotor decreases, and the restoring force generated by the first spring 506, the second spring 508 and the spring 511 will pull the wind rotor back to the vertical position. When the wind wheel drives the swing cart 1 to swing to the right, the action process is opposite, and the restoring force generated by the first spring 506, the second spring 508 and the spring 511 will still make the wind wheel return to the vertical position.

Example 2

Referring to FIG. 5 , the difference from Embodiment 1 is that this embodiment only uses one wind wheel locking pin assembly 2 , and the outer casing of the wind wheel locking pin assembly 2 is connected to one end of the swing trolley 1 and is fixed as a whole. Similarly, , the two flexible rotor locking units 5 are symmetrically distributed on the left and right sides of the flange 3 at the front end of the gearbox, and the wire rope group 501 of one flexible rotor locking unit 5 is connected to the casing of the rotor locking pin assembly 2, while the The wire rope group 501 of the other flexible wind wheel locking unit 5 is connected to the other end of the swing trolley 1 .

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Therefore, any changes made according to the shape and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A flexible wind rotor locking device for a braking system of an anti-typhoon wind turbine, the braking system of the wind turbine comprising a rotor locking disc (6), a front flange (3) of a gearbox, a rotor locking pin The assembly (2), the rotor locking disc (6) and the hub (8) of the rotor are fixed by bolts, and the front end flange (3) of the gearbox is a part of the gearbox of the wind turbine, which is respectively connected to the wind turbine. The generator of the generator set and the nacelle casing (7) are connected and fixed by bolts, and the rotor locking pin assembly (2) includes a rotor locking pin (201) and a rotor locking pin (201) for driving the rotor locking pin (201) to extend or retract. Under the action of the driving device, the wind wheel locking pin (201) can extend into the locking hole on the wind wheel locking plate (6), so as to lock the wind wheel locking plate (6) by locking the wind wheel locking plate (6). It is characterized in that: the flexible wind wheel locking device includes a swinging trolley (1) and two flexible wind wheel locking units (5); wherein, the upper half of the front end flange (3) of the gear box is formed with a an arc-shaped guide rail slot hole (4) extending along its circumferential direction, and the left and right parts of the arc-shaped guide rail slot hole (4) are mirror-symmetrical with respect to the vertical centerline of the front end flange (3) of the gearbox; The swing trolley (1) is installed in the arc-shaped guide rail slot hole (4), and can only move in the arc-shaped guide rail slot hole (4), and the wind wheel locking pin assembly (2) has two placed in the arc-shaped guide rail slot hole (4). The grooves (4) of the shaped guide rails are 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). The connection is fixed as a whole, so that after the lock pin (201) of the wind wheel is extended to lock the wind wheel, the rotation of the wind wheel can drive the two lock pin assemblies (2) of the wind wheel to follow the swinging trolley (1) in the arc guide groove. The two flexible wind wheel locking units (5) are symmetrically distributed on the left and right sides of the front end flange of the gearbox, and correspond to the two wind wheel locking pin assemblies (2), namely A wind wheel locking pin assembly (2) is matched with a flexible wind wheel locking unit (5); the flexible wind wheel locking unit (5) includes a wire rope group (501), a fixed pulley (502), a movable pulley (503), and a guide column (504), a support seat (505), a first spring (506), a spacer (507), a second spring (508), a spring end plate (509) and a guide column end plate (510), the support seat ( 505) is fixed on the lower half of the flange (3) at the front end of the gearbox, the fixed pulley (502) is fixed on the flange (3) at the front end of the gearbox, and is located in the slot hole (4) of the arc guide and the support seat ( 505), the movable pulley (503) is placed between the fixed pulley (502) and the support seat (505), and is installed on the top of the guide column (504), and the bottom of the guide column (504) is vertically oriented. It passes through the support seat (505), the partition plate (507), and the spring end plate (509) in sequence, and then is fixedly connected to the guide column end plate (510), and the guide column end plate (510) prevents the guide column (504) from disengaging. Spring end plate ( 509), the first spring (506) is placed between the support seat (505) and the partition plate (507), and is sleeved on the guide column (504), and its two ends are respectively connected to the support seat (505) and the partition plate (507) is connected, the second spring (508) is placed between the partition plate (507) and the spring end plate (509), and is sleeved on the guide post (504), the two ends of which are respectively connected to the partition plate (507) connected with the spring end plate (509), the partition plate (507) and the spring end plate (509) can slide on the guide column (504), and one end of the wire rope group (501) is connected with the corresponding wind wheel locking pin assembly ( 2) The outer casing is fixedly connected, and the other end of the other end goes down around the fixed pulley (502) and the movable pulley (503) in turn, and then upwardly connects to the front flange (3) of the gearbox, and is close to the fixed pulley (502), using the guide column (504) and the gravity of the guide column end plate (510) make the wire rope group (501) taut. 2. The flexible wind wheel locking device for a braking system of an anti-typhoon wind turbine according to claim 1, wherein the space distance between the support base (507) and the movable pulley (503) is greater than the first The total stroke of the spring (506) and the second spring (508), so that when the movable pulley (503) moves downward, the wire rope group (501) is always tensioned. 3. The flexible wind rotor locking device for a braking system of an anti-typhoon wind turbine according to claim 1, characterized in that: between the support base (505) and the partition plate (507) and between the partition plate (507) ) and the spring end plate (509) are connected with a spring (511) not sleeved on the guide post (504) to increase the restoring force. 4. The flexible wind wheel locking device used for the braking system of an anti-typhoon wind turbine according to claim 1, characterized in that: the swing trolley (1) adopts a double-layer double-row conical rolling wheel, which can withstand the wind wheel Additional bending moments developed on the locking pin assembly. 5. The flexible wind wheel locking device for the braking system of the anti-typhoon wind turbine according to claim 1, characterized in that: the limit positions of the two ends of the arc-shaped guide rail slot (4) are equipped with buffers, In order to reduce the impact force generated when the rotor locking assembly (2) swings to the limit position; and the two rotor locking pin assemblies (2) are separated by 60°. 6. A flexible wind rotor locking device for a braking system of an anti-typhoon wind turbine, the braking system of the wind turbine comprising a rotor locking disc (6), a gear box front flange (3), a rotor locking pin The assembly (2), the rotor locking disc (6) and the hub (8) of the rotor are fixed by bolts, and the front end flange (3) of the gearbox is a part of the gearbox of the wind turbine, which is respectively connected to the wind turbine. The generator of the generator set and the nacelle casing (7) are connected and fixed by bolts, and the rotor locking pin assembly (2) includes a rotor locking pin (201) and a rotor locking pin (201) for driving the rotor locking pin (201) to extend or retract. Under the action of the driving device, the wind wheel locking pin (201) can extend into the locking hole on the wind wheel locking plate (6), so as to lock the wind wheel locking plate (6) by locking the wind wheel locking plate (6). It is characterized in that: the flexible wind wheel locking device includes a swinging trolley (1) and two flexible wind wheel locking units (5); wherein, the upper half of the front end flange (3) of the gear box is formed with a an arc-shaped guide rail slot hole (4) extending along its circumferential direction, and the left and right parts of the arc-shaped guide rail slot hole (4) are mirror-symmetrical with respect to the vertical centerline of the front end flange (3) of the gearbox; 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). The guide rail slot (4) is located on the side of the swing trolley (1), and the outer casing of the wind wheel locking pin assembly (2) is connected with one end of the swing trolley (1), and is fixed as a whole, so that the wind wheel is locked After the pin (201) 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 angular range defined by the arc-shaped guide rail slot hole (4); The flexible wind wheel locking unit (5) is symmetrically distributed on the left and right sides of the front end flange of the gearbox; the flexible wind wheel locking unit (5) includes a wire rope group (501), a fixed pulley (502), and a movable pulley (503) , guide column (504), support seat (505), first spring (506), partition plate (507), second spring (508), spring end plate (509) and guide column end plate (510), the The support seat (505) is fixed on the lower half of the flange (3) at the front end of the gear box, and the fixed pulley (502) is fixed on the flange (3) at the front end of the gear box, and is located at the slot hole (4) and the groove of the arc guide rail. Between the support bases (505), the movable pulley (503) is placed between the fixed pulley (502) and the support base (505), and is installed on the top of the guide column (504), and the bottom of the guide column (504) Vertically and downwardly, it passes through the support seat (505), the partition plate (507), and the spring end plate (509) and is then fixedly connected with the guide column end plate (510), through which the guide column end plate (510) prevents the guide column ( 504) Detach the spring end plate (509), the first spring (506) is placed between the support seat (505) and the partition plate (507), and is sleeved on the guide post (504), the two ends of which are respectively connected to the guide post (504). The support seat (505) is connected with the partition plate (507), the second spring (508) is placed between the partition plate (507) and the spring end plate (509), and is sleeved on the guide column (504), and the two springs (508) are The ends are respectively connected with the partition plate (507) and the spring end plate (509), the partition plate (507) and the spring end plate (509) can slide on the guide post (504); one of the flexible wind wheel locking units (5 One end of the wire rope set (501) of ) is fixedly connected with the casing of the wind wheel locking pin assembly (2), and the other end of the wire rope group (501) is connected downward to the fixed pulley (502) and the movable pulley (503) in turn, and then upwardly connected to the front flange (3) of the gearbox. ) and close to the fixed pulley (502), the wire rope group (501) is tightened by the gravity of the guide column (504) and the guide column end plate (510); the wire rope group of another flexible wind wheel locking unit (5) One end of (501) is connected to the other end of the swing trolley (1), and the other end of the wire rope group (501) is wound downward in turn around the fixed pulley (502) and the movable pulley (503), and then upwardly connected to the front flange (3) of the gearbox. up and close to the fixed pulley (502). 7. The flexible wind wheel locking device for a typhoon-resistant wind turbine braking system according to claim 6, wherein the space distance between the support base (507) and the movable pulley (503) is greater than the first The total stroke of the spring (506) and the second spring (508), so that when the movable pulley (503) moves downward, the wire rope group (501) is always tensioned. 8. The flexible wind rotor locking device for a braking system of an anti-typhoon wind turbine according to claim 6, characterized in that: between the support base (505) and the partition plate (507) and between the partition plate (507) ) and the spring end plate (509) are connected with a spring (511) not sleeved on the guide post (504) to increase the restoring force. 9 . The flexible wind wheel locking device for a braking system of an anti-typhoon wind turbine according to claim 6 , wherein the swing trolley (1) adopts a double-layer double-row conical rolling wheel, which can withstand the wind wheel. 10 . Additional bending moments developed on the locking pin assembly. 10. The flexible wind wheel locking device for the braking system of anti-typhoon wind turbines according to claim 6, characterized in that: buffers are installed at the extreme positions of both ends of the arc-shaped guide rail slot (4), In order to reduce the impact force generated when the rotor locking assembly (2) swings to the limit position.

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