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

Abstract

The present invention discloses a flexible wind wheel locking device of a typhoon-resistant wind turbine generator braking system, which adopts a flexible wind wheel locking design scheme, including two rope collecting devices symmetrically distributed on the left and right sides of the front flange of the gear box, connected to the left and right ends of the swing trolley, and the swing 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 of the left or right rope collecting device to tighten, and at the same time drive one of the guide columns in the bottom center frame of the front flange of the gear box to be pulled out, so that the spring mounted 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. When the wind wheel deviates more from the positive "Y" position, the restoring force is greater, 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

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 device for 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. In view of the problem that the existing typhoon-resistant generator sets completely lock or completely release the wind rotor, resulting in a heavy load on the entire unit, a flexible wind rotor locking device for the braking system of a typhoon-resistant wind turbine generator set is proposed. A flexible wind rotor locking design scheme is adopted to allow the wind rotor to swing within a certain angle and provide a restoring force for the wind rotor. The greater the wind rotor deviates from the positive "Y" position, the greater the restoring force, which can greatly reduce the load on the wind rotor and the entire machine, greatly reducing the overall design difficulty of the wind turbine generator set.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a flexible wind rotor locking device 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. The wind wheel locking plate is used to lock the wind wheel; the flexible wind wheel locking device includes a swinging trolley, a first guide column, a second guide column, a left end plate of the guide column, a left end plate of the spring, a first spring, a partition, a second spring, a right end plate of the spring, a right end plate of the guide column and two rope collecting devices; wherein, the upper half of the front end flange of the gear box is formed with an arc guide rail slot extending along its circumference, and the left and right parts of the arc 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 guide rail slot and can only move in the arc guide rail slot, and the wind wheel locking pin assembly has two placed in the arc guide rail slot and located on the left and right sides of the swinging trolley, and the two wind The outer shells of the wheel locking pin assembly are respectively connected to the left and right ends of the swing trolley and are fixed as 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 to move with the swing trolley within the angle range limited by the arc guide rail slot hole; a frame for installing a spring is formed in the middle of the bottom of the front end flange of the gear box, and the left end plate of the spring, the first spring, the partition, the second spring and the right end plate of the spring are placed in the frame, and the first guide column and the second guide column are parallel to each other and horizontally inserted on the frame side by side up and down, one end of the first guide column passes through the left side of the frame and is connected to the left end plate of the guide column, and the other end passes through the left end plate of the spring and the partition in sequence and is connected to the right end plate of the spring The first spring has two groups arranged between the left end plate of the spring and the partition plate, and are respectively mounted on the first guide column and the second guide column, and their two ends are respectively connected to the left end plate of the spring and the partition plate; the second spring has two groups arranged between the partition plate and the right end plate of the spring, and are respectively mounted on the first guide column and the second guide column, and their two ends are respectively connected to the partition plate and the right end plate of the spring; the partition plate can slide on the first guide column and the second guide column, the left end plate of the spring can slide on the first guide column, and the right end plate of the spring can slide on the second guide column;The two rope collecting devices are symmetrically distributed on the left and right sides of the front end flange of the gear box, and correspond to the two wind wheel locking pin assemblies, that is, one wind wheel locking pin assembly is equipped with a rope collecting device, the rope collecting device includes a first wire rope group, a second wire rope group, a bracket and a first fixed pulley respectively installed on the bracket, a movable pulley with a support seat, an auxiliary wheel and a second fixed pulley, the bracket is fixed to the front end flange of the gear box, and is formed with two mutually symmetrical, vertically downward long strip slots, the support seat is located between the two long strip slots, a shaft is horizontally provided on the support seat, the movable pulley is assembled on the shaft, and the two ends of the shaft extend out of the support seat on both sides and are respectively inserted into the two long strip slots, so that the movable pulley can move with the support seat in the long strip slots The first fixed pulley is arranged above the movable pulley and close to the corresponding limit position of the arc guide slot hole. The second fixed pulley is arranged below the movable pulley and is equipped with an auxiliary wheel. The auxiliary wheel is close to the second fixed pulley, and a gap is reserved between them for the second wire rope group to pass through. One end of the first wire rope group is fixedly connected to the housing of the corresponding wind wheel locking pin assembly, and the other end of the first wire rope group is downwardly bypassed by the first fixed pulley and the movable pulley in turn, and then connected to the front flange of the gear box upward, and close to the first fixed pulley. One end of the second wire rope group is fixedly connected to the bottom of the support seat, and the other end of the second wire rope group is downwardly passed through the gap between the auxiliary wheel and the second fixed pulley, and then bypassed the second fixed pulley to connect to the corresponding guide column end plate. ;

[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 degrees apart.

[0008] Another technical solution provided by the present invention is: a flexible wind rotor locking device 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 casing 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. The wheel locking plate is used to lock the wind wheel; the flexible wind wheel locking device includes a swinging trolley, a first guide column, a second guide column, a left end plate of the guide column, a left end plate of the spring, a first spring, a partition, a second spring, a right end plate of the spring, a right end plate of the guide column and two rope collecting devices; wherein, the 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, and the wind wheel locking pin assembly has one placed in the arc-shaped guide rail slot and located on one side of the swinging trolley, and the wind wheel lock The shell of the fixed pin assembly is connected to one end of the swing trolley and is fixed as 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 to move with the swing trolley within the angle range limited by the arc guide rail slot hole; a frame for installing a spring is formed in the middle of the bottom of the front end flange of the gear box, and the left end plate of the spring, the first spring, the partition, the second spring and the right end plate of the spring are placed in the frame, and the first guide column and the second guide column are parallel to each other and horizontally inserted on the frame side by side up and down, one end of the first guide column passes through the left side of the frame to be connected to the left end plate of the guide column, and the other end thereof passes through the left end plate of the spring and the partition in sequence and is connected to the right end plate of the spring. One end of the second guide column passes through the right side of the frame and the right end plate of the guide column, and the other end passes through the right end plate of the spring and the partition plate in sequence and is connected to the left end plate of the spring. The first spring has two groups arranged between the left end plate of the spring and the partition plate, and are respectively mounted on the first guide column and the second guide column, and the two ends thereof are respectively connected to the left end plate of the spring and the partition plate. The second spring has two groups arranged between the partition plate and the right end plate of the spring, and are respectively mounted on the first guide column and the second guide column, and the two ends thereof are respectively connected to the partition plate and the right end plate of the spring. The partition plate can slide on the first guide column and the second guide column, the left end plate of the spring can slide on the first guide column, and the right end plate of the spring can slide on the second guide column.The two rope collecting devices are symmetrically distributed on the left and right sides of the front end flange of the gear box, and the rope collecting device includes a first wire rope group, a second wire rope group, a bracket and a first fixed pulley respectively installed on the bracket, a movable pulley with a support seat, an auxiliary wheel and a second fixed pulley, the bracket is fixed to the front end flange of the gear box, and is formed with two mutually symmetrical and vertically downward long strip slots, the support seat is located between the two long strip slots, an axis is horizontally arranged on the support seat, the movable pulley is assembled on the axis, and the two sides of the support seat at both ends of the axis protrude outward and are respectively inserted into the two long strip slots, so that the movable pulley can move up and down within the range limited by the long strip slots with the support seat, the first fixed pulley is arranged above the movable pulley and close to the corresponding limit position of the arc guide rail slot, the second fixed pulley is arranged below the movable pulley and is equipped with An auxiliary wheel is sleeved, the auxiliary wheel is close to the second fixed pulley, and a gap is reserved between them for the second wire rope group to pass through; one end of the first wire rope group of one rope collection device is fixedly connected to the housing of the wind wheel locking pin assembly, and the other end of the first wire rope group is downwardly bypassed by the first fixed pulley and the movable pulley in turn, and then connected to the front flange of the gear box upward, and close to the first fixed pulley, while one end of the first wire rope group of another rope collection device is fixedly connected to the other end of the swing trolley, and the other end of the first wire rope group is downwardly bypassed by the first fixed pulley and the movable pulley in turn, and then connected to the front flange of the gear box upward, and close to the first fixed pulley. One end of the second wire rope group of the two rope collection devices is fixedly connected to the bottom of the support seat, and the other end of the second wire rope group is downwardly passed through the gap between the auxiliary wheel and the second fixed pulley, and then bypassed the second fixed pulley to connect to the corresponding guide column end plate. ;

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

[0012] 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 arrival of the typhoon, the wind wheel is locked in the positive "Y" direction 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, thereby significantly reducing the load of the whole machine under typhoon conditions.

[0013] 2. Since the flexible wind wheel locking device of the present invention is related to the operational safety of the wind turbine generator set, it requires high reliability. Therefore, the present invention adopts a mechanical structure composed of a spring and a steel 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.

[0014] 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.

[0015] 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.

[0016] 5. Since the present invention is directly locked on the wind turbine hub side of the wind turbine generator set 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a partial schematic diagram of the braking system of the typhoon-resistant wind turbine generator set in Example 1.

[0018] Figure 2 This is the front view of the flexible wind wheel locking device in Example 1.

[0019] Figure 3 This is an axial view of the flexible wind wheel locking device in Example 1.

[0020] Figure 4 This is a partial cross-sectional view of the flexible wind wheel locking device in Example 1.

[0021] Figure 5 This is a cross-sectional view of the swing trolley in Example 1 after being installed in the arc guide rail slot.

[0022] Figure 6 This is the front view of the flexible wind wheel locking device in Example 2. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with specific embodiments.

[0024] Example 1

[0025] The flexible wind wheel locking device provided in this embodiment is mainly used in the braking system of a typhoon-resistant wind turbine generator set, such as Figure 1As shown, the braking system is mainly composed of a wind rotor locking disk 16, a front end flange 3 of a gear box, and a wind rotor locking pin assembly 2. The wind rotor locking disk 16 is fixed to a hub 17 of a wind rotor (not shown in the figure) by bolts. 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 18 of the wind turbine generator set by bolts. 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 16 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 16, thereby locking the wind rotor by locking the wind rotor locking disk 16, so that the flexible wind rotor locking device takes effect.

[0026] See also Figures 2 to 4As shown, the flexible wind wheel locking device described in this embodiment includes a swinging trolley 1, a first guide column 5, a second guide column 9, a left end plate 6 of the guide column, a left end plate 10 of the spring, a first spring 11, a partition 12, a second spring 13, a right end plate 14 of the spring, a right end plate 7 of the guide column and two rope collecting devices 8. Among them, the upper half of the front flange 3 of the gear box is formed with an arc-shaped guide rail slot 4 extending along its circumference, and the left and right parts of the arc-shaped guide rail slot 4 are mirror-symmetrical about the vertical center line of the front flange 3 of the gear box; the swinging 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 parts placed in the arc-shaped guide rail slot 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, and are fixed as a whole, so that after the wind wheel locking pin 201 extends out to lock the wind wheel, the wind wheel The rotation 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, rubber pads or rubber springs are customized to buffer the wind wheel locking assembly 2 when it swings to the extreme position. Of course, buffers of other elastic materials or spring types can also be used) to reduce the impact force generated when the wind wheel locking assembly 2 swings to the extreme position; the spring left end plate 10, the first spring 11, the partition 12, the second spring 13 and the spring right end plate 14 are placed in the frame 15, and the first guide column 5 and the second guide column 9 are parallel to each other and horizontally inserted on the frame 15 side by side up and down. One end of the first guide column 5 passes through the left side of the frame 15 and is connected to the left end plate 6 of the guide column, and the other end thereof passes through the left end plate 10 of the spring and the partition plate 12 in sequence and is connected to the right end plate 14 of the spring. One end of the second guide column 9 passes through the right side of the frame 15 and is connected to the right end plate 7 of the guide column, and the other end thereof passes through the right end plate 14 of the spring and the partition plate 12 in sequence and is connected to the left end plate 10 of the spring. The first spring 11 has two groups arranged between the left end plate 10 of the spring and the partition plate 12, and is respectively mounted on the first guide column 5 and the second guide column 9, and its two ends are respectively connected to the left end plate 10 of the spring. The plate 10 is connected to the partition 12, and the second spring 13 has two groups arranged between the partition 12 and the spring right end plate 14, and is respectively mounted on the first guide column 5 and the second guide column 9, and its two ends are respectively connected to the partition 12 and the spring right end plate 14, the partition 12 can slide on the first guide column 5 and the second guide column 9, the spring left end plate 10 can slide on the first guide column 5, and the spring right end plate 14 can slide on the second guide column 9; two rope collecting devices 8 are symmetrically distributed on the left and right sides of the front end flange 3 of the gear box, and correspond to two wind wheel locking pin assemblies 2, that is, one wind wheel locking pin assembly 2 is equipped with one rope collecting device 8;The rope collecting device 8 includes a first steel wire rope group 801, a second steel wire rope group 806, a bracket 807, and a first fixed pulley 802, a movable pulley 803 with a support seat 808, an auxiliary wheel 804, and a second fixed pulley 805 respectively installed on the bracket 807. The bracket 807 is fixed to the front end flange 3 of the gear box and is formed with two mutually symmetrical, vertically downward long strip slots 809. The support seat 808 is located between the two long strip slots 809. A shaft 810 is horizontally arranged on the support seat 808. The movable pulley 803 is assembled on the shaft 810, and the two ends of the shaft 810 extend outward from the two sides of the support seat 808 and are respectively inserted into the two long strip slots 809, so that the movable pulley 803 can move up and down with the support seat 808 within the range defined by the long strip slots 809. 802 is arranged above the movable pulley 803 and close to the corresponding limit position of the arc guide slot 4. The second fixed pulley 805 is arranged below the movable pulley 803 and is equipped with an auxiliary wheel 804. The auxiliary wheel 804 is close to the second fixed pulley 805, and a gap is reserved between them for the second steel wire rope group 806 to pass through. One end of the first steel wire rope group 801 is fixedly connected to the housing of the corresponding wind wheel locking pin assembly 2, and the other end of the first steel wire rope group 801 is downwardly bypassed by the first fixed pulley 802 and the movable pulley 803 in turn, and then connected to the front flange 3 of the gear box upward, and close to the first fixed pulley 802. One end of the second steel wire rope group 806 is fixedly connected to the bottom of the support seat 808, and the other end of the second steel wire rope group 806 is downwardly passed through the gap between the auxiliary wheel 804 and the second fixed pulley 805, and then bypassed the second fixed pulley 805 and connected to the corresponding guide column end plate. ;

[0027] Since all components of the flexible wind wheel locking device are supported on the front flange 3 of the gear box, the structure and size of the 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 the wind wheel locking component of ±30°, and the arc guide surface needs to be surface hardened.

[0028] 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.

[0029] See also Figure 5As 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.

[0030] 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 requirements of bearing capacity and stroke 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 combined springs of different specifications and types can be selected according to the requirements of the stiffness curve.

[0031] Since the wind wheel locking pin assembly 2 has a large swing arc length, 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. Therefore, it is necessary to use a movable pulley 803 to reduce the stroke by half, and use two compression springs in series to meet the stroke requirement.

[0032] When the swing trolley 1 moves to the right on the arc-shaped guide rail slot 4, the first steel wire rope group 801 connected to the left side of the wind wheel locking pin 2 drives the swing trolley 1 to move upward, and then drives the movable pulley 803 to move upward. The second steel wire rope group 806 connected to the support seat 808 of the movable pulley 803 drives the left end plate 6 of the guide column to move to the left, and the first guide column 5 generates a pulling force on the right end plate 14 of the spring, thereby compressing the two groups of springs and making the two groups of springs generate a restoring force. When the first steel wire rope group 801 on the left drives the movable pulley 803 to move downward, the second steel wire rope group 806 is prevented from loosening downward and does not generate an acting force. The auxiliary wheel 804 ensures that the second steel wire rope group 806 returns to its original position. When the swing trolley 1 moves to the left on the arc-shaped guide rail slot 4, the first steel wire rope group 801 connected to the right side of the wind wheel locking pin 2 drives the swing trolley 1 to move upward, and then drives the movable pulley 803 to move upward. The second steel wire rope group 806 connected to the support seat 808 of the movable pulley 803 drives the right end plate 7 of the guide column to move to the right, and the second guide column 9 generates a pulling force on the left end plate 10 of the spring, thereby compressing the two groups of springs and making the two groups of springs generate a restoring force. When the first steel wire rope group 801 on the right drives the movable pulley 803 to move downward, the second steel wire rope group 806 is prevented from loosening downward and does not generate an acting force. The auxiliary wheel 804 ensures that the second steel wire rope group 806 is returned to its position.

[0033] In summary, the principle of the flexible wind wheel locking device 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-shaped guide rail 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-shaped guide rail slot 4.

[0034] When the first steel wire rope group 801 of the left rope collecting device 8 drives the movable pulley 803 to move upward, the left end plate 6 of the guide column is driven to move to the left through the second steel wire rope group 806, and the first guide column 5 generates a pulling force on the right end plate 14 of the spring group, thereby compressing the first spring 11 and the second spring 13, and the generated restoring force will return the wind wheel to the vertical position. When the first steel wire rope group 801 of the rope collecting device 8 drives the movable pulley 803 to move downward, the second steel wire rope group 806 prevents loosening downward and does not generate any force, and the auxiliary wheel 804 ensures that the steel wire rope group returns to its original position. When the first steel wire rope group 801 of the right rope collecting device 8 drives the movable pulley 803 to move upward, the situation is just the opposite, and the restoring force generated by the first spring 11 and the second spring 13 will still return the wind wheel to the vertical position.

[0035] Example 2

[0036] See also Figure 6As shown, the difference from Example 1 is that this embodiment only uses one wind wheel locking pin assembly 2, the shell 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 rope collecting devices 8 are symmetrically distributed on the left and right sides of the front end flange 3 of the gear box, and the first steel wire rope group 801 of one of the rope collecting devices 8 is connected to the shell of the wind wheel locking pin assembly 2, while the first steel wire rope group 801 of the other rope collecting device 8 is connected to the other end of the swing trolley 1.

[0037] 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 device for a typhoon-resistant wind turbine generator set braking system, the braking system of the wind turbine generator set comprising a wind rotor locking disk (16), a gear box front end flange (3), and a wind rotor locking pin assembly (2), the wind rotor locking disk (16) being fixed to a hub (17) 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 (18) 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 (16), thereby locking the wind rotor by locking the wind rotor locking disk (16); characterized in that: The flexible wind wheel locking device comprises a swinging trolley (1), a first guide column (5), a second guide column (9), a left end plate of the guide column (6), a left end plate of the spring (10), a first spring (11), a partition (12), a second spring (13), a right end plate of the spring (14), a right end plate of the guide column (7) and two rope collecting devices (8); wherein, an arc-shaped guide rail slot (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 (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-shaped guide rail slot (4) and can only be moved in the arc-shaped guide rail slot (4) moves 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 defined by the arc-shaped guide rail slot (4); a frame (15) for installing a spring is formed in the middle of the bottom of the front end flange (3) of the gear box, and the left end plate (10) of the spring, the first spring (11), the partition plate (12), the second spring (1 3) and the right end plate (14) of the spring are placed in the frame (15); the first guide column (5) and the second guide column (9) are parallel to each other and horizontally inserted on the frame (15) side by side up and down; one end of the first guide column (5) passes through the left side of the frame (15) and is connected to the left end plate (6) of the guide column; the other end of the first guide column (5) passes through the left end plate (10) and the partition plate (12) in sequence and is connected to the right end plate (14) of the spring; one end of the second guide column (9) passes through the right side of the frame (15) and is connected to the right end plate (7) of the guide column; the other end of the first guide column (9) passes through the right end plate (14) and the partition plate (12) in sequence and is connected to the left end plate (10) of the spring; the first spring (11) has two groups of springs arranged on the left end plate of the spring (10) and the partition (12), and are respectively mounted on the first guide column (5) and the second guide column (9), and their two ends are respectively connected to the left end plate (10) and the partition (12); the second spring (13) has two groups arranged between the partition (12) and the right end plate (14) of the spring, and are respectively mounted on the first guide column (5) and the second guide column (9), and their two ends are respectively connected to the partition (12) and the right end plate (14) of the spring; the partition (12) can slide on the first guide column (5) and the second guide column (9); the left end plate (10) of the spring can slide on the first guide column (5), and the right end plate (14) of the spring can slide on the second guide column (9);The two rope collecting devices (8) are symmetrically distributed on the left and right sides of the front flange (3) of the gear box, and correspond to the two wind wheel locking pin assemblies (2), that is, one wind wheel locking pin assembly (2) is equipped with one rope collecting device (8), and the rope collecting device (8) includes a first steel wire rope group (801), a second steel wire rope group (806), a bracket (807), and a first fixed pulley (802) respectively installed on the bracket (807), a movable pulley (803) with a support seat (808), an auxiliary wheel (804) and a second fixed pulley (805) ), the bracket (807) is fixed on the front end flange (3) of the gear box, and is formed with two symmetrical, vertically downward long strip slots (809), the support seat (808) is located between the two long strip slots (809), and a shaft (810) is horizontally arranged on the support seat (808), the movable pulley (803) is assembled on the shaft (810), and the two ends of the shaft (810) extend outward from the two sides of the support seat (808) and are respectively inserted into the two long strip slots (809), so that the movable pulley (803) The supporting seat (808) can move up and down within the range defined by the long strip slot (809), the first fixed pulley (802) is arranged above the movable pulley (803) and close to the corresponding limit position of the arc guide slot (4), the second fixed pulley (805) is arranged below the movable pulley (803) and is equipped with an auxiliary wheel (804), the auxiliary wheel (804) is close to the second fixed pulley (805), and a gap is reserved between them for the second steel wire rope group (806) to pass through, the first steel wire rope group One end of the second steel wire rope (801) is fixedly connected to the housing of the corresponding wind wheel locking pin assembly (2), and the other end of the second steel wire rope (801) is passed through the first fixed pulley (802) and the movable pulley (803) in sequence downwards and then connected to the front flange (3) of the gear box upwards and close to the first fixed pulley (802). One end of the second steel wire rope (806) is fixedly connected to the bottom of the support seat (808), and the other end of the second steel wire rope (806) is passed through the gap between the auxiliary wheel (804) and the second fixed pulley (805) downwards and then passed through the second fixed pulley (805) and connected to the corresponding guide column end plate.

2. The flexible wind wheel locking device 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 device of the typhoon-resistant wind turbine generator braking system according to claim 1 is characterized in that: Buffering parts 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 device 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 device 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 (16), a gear box front end flange (3), and a wind rotor locking pin assembly (2), the wind rotor locking disk (16) being fixed to a hub (17) 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 (18) 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 (16), thereby locking the wind rotor by locking the wind rotor locking disk (16); characterized in that: The flexible wind wheel locking device comprises a swinging trolley (1), a first guide column (5), a second guide column (9), a left end plate (6) of the guide column, a left end plate (10) of the spring, a first spring (11), a partition (12), a second spring (13), a right end plate (14) of the spring, a right end plate (7) of the guide column and two rope collecting devices (8); wherein, an arc-shaped guide rail slot (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 (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-shaped guide rail slot (4) and can only be locked in the arc-shaped guide rail slot (4). The wind wheel locking pin assembly (2) is arranged in the arc-shaped guide rail slot hole (4) and is located on one side of the swing trolley (1), and the outer shell of the wind wheel locking pin assembly (2) is connected to one 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 defined by the arc-shaped guide rail slot hole (4); a frame (15) for installing a spring is formed in the middle of the bottom of the front end flange (3) of the gear box, and the left end plate (10) of the spring, the first spring (11), the partition plate (12), the second spring (13) and the right end plate (15) of the spring The end plate (14) is placed in the frame (15); the first guide column (5) and the second guide column (9) are parallel to each other and horizontally inserted on the frame (15) side by side. One end of the first guide column (5) passes through the left side of the frame (15) and is connected to the left end plate (6) of the guide column, and the other end of the first guide column passes through the left end plate (10) and the partition plate (12) in sequence and is connected to the right end plate (14) of the spring. One end of the second guide column (9) passes through the right side of the frame (15) and is connected to the right end plate (7) of the guide column, and the other end of the first guide column passes through the right end plate (14) and the partition plate (12) in sequence and is connected to the left end plate (10) of the spring. The first spring (11) has two groups of springs arranged on the left end plate (10) of the spring. ) and the partition (12), and are respectively mounted on the first guide column (5) and the second guide column (9), and their two ends are respectively connected to the left end plate (10) of the spring and the partition (12); the second spring (13) has two groups arranged between the partition (12) and the right end plate (14) of the spring, and are respectively mounted on the first guide column (5) and the second guide column (9), and their two ends are respectively connected to the partition (12) and the right end plate (14) of the spring; the partition (12) can slide on the first guide column (5) and the second guide column (9); the left end plate (10) of the spring can slide on the first guide column (5), and the right end plate (14) of the spring can slide on the second guide column (9);Two rope collecting devices (8) are symmetrically distributed on the left and right sides of the front flange (3) of the gear box. The rope collecting device (8) includes a first steel wire rope group (801), a second steel wire rope group (806), a bracket (807), and a first fixed pulley (802), a movable pulley (803) with a support seat (808), an auxiliary wheel (804) and a second fixed pulley (805) respectively installed on the bracket (807). The bracket (807) is fixed on the front flange (3) of the gear box and is formed with two mutually symmetrical, vertically downward long strip slots (809). The support seat (808) is located at Between the two long strip slots (809), a shaft (810) is horizontally arranged on the support seat (808), the movable pulley (803) is assembled on the shaft (810), and the two ends of the shaft (810) extend out of the two sides of the support seat (808) and are respectively inserted into the two long strip slots (809), so that the movable pulley (803) can move up and down with the support seat (808) within the range limited by the long strip slots (809), the first fixed pulley (802) is arranged above the movable pulley (803) and close to the corresponding limit position of the arc guide slot (4), and the second fixed pulley (805) is arranged below the movable pulley (803) and is equipped with an auxiliary wheel (804), the auxiliary wheel (804) is close to the second fixed pulley (805), and a gap is reserved between them for the second wire rope group (806) to pass through; one end of the first wire rope group (801) of one of the rope collecting devices (8) is fixedly connected to the housing of the wind wheel locking pin assembly (2), and the other end of the first wire rope group (801) is downwardly passed around the first fixed pulley (802) and the movable pulley (803) in turn, and then upwardly connected to the front end flange (3) of the gear box and close to the first fixed pulley (802), while the other rope collecting device (8) One end of the first steel wire rope group (801) is fixedly connected to the other end of the swing trolley (1), and the other end of the first steel wire rope group (801) is downwardly passed through the first fixed pulley (802) and the movable pulley (803) in sequence, and then upwardly connected to the front flange (3) of the gear box and close to the first fixed pulley (802). One end of the second steel wire rope group (806) of the two rope collecting devices (8) is fixedly connected to the bottom of the support seat (808), and the other end thereof is downwardly passed through the gap between the auxiliary wheel (804) and the second fixed pulley (805), and then passed through the second fixed pulley (805) and connected to the corresponding guide column end plate. ; 6. The flexible wind wheel locking device 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 device of the typhoon-resistant wind turbine generator braking system according to claim 5 is characterized in that: Buffering parts 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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