CN112441532B

CN112441532B - Position control system of blade repairing platform of wind generating set

Info

Publication number: CN112441532B
Application number: CN201910830616.4A
Authority: CN
Inventors: 李卓; 严辉煌; 王菲
Original assignee: Jiangsu Goldwind Science and Technology Co Ltd
Current assignee: Jiangsu Goldwind Science and Technology Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2022-08-23
Anticipated expiration: 2039-09-04
Also published as: CN112441532A

Abstract

The invention provides a position control system of a blade repairing platform of a wind generating set. The blade repair platform comprising a basket and a lift cord suspending the basket, the position control system comprising: the annular fixing piece is sleeved on a tower cylinder of the wind generating set and can move in the vertical direction along the tower cylinder; the traction mechanism is arranged on one side of the annular fixed piece close to the hanging basket; the first rope is connected with the traction mechanism and the hanging basket, and the traction mechanism can release or withdraw the first rope so as to control the distance between the hanging basket and the blade to be repaired of the wind generating set; an anchor line, a first end of the anchor line being connected to the basket and a second end of the anchor line being connected to the control point. According to the position control system provided by the invention, the stability of the hanging basket can be improved, and the hanging basket is prevented from colliding with the blades.

Description

Position control system of blade repairing platform of wind generating set

Technical Field

The invention relates to the technical field of wind power generation, in particular to a position control system of a blade repairing platform of a wind generating set.

Background

The blade of the wind generating set directly affects the conversion efficiency of wind energy, so when the blade of the wind generating set is damaged in the operation process, the blade of the wind generating set needs to be repaired.

At present, when blades of an onshore wind generating set are repaired, a hanging basket suspended by a steel wire rope is placed at a head of a fan, workers are carried to the positions, to be repaired, of the blades, and two ground anchors on the land provide tension force below the hanging basket. However, when the weather of a gust occurs, the nacelle may hit the blades, which threatens the safety of maintenance personnel, equipment and blades and causes great loss.

In addition, the current repair of blades for offshore wind energy plants is similar to the repair of blades for onshore wind energy plants, except that the tension needs to be provided by ship anchors. As the marine climate conditions are worse than the onshore climate conditions, even if the weather is calm and suitable for operation, gusts of wind of more than 10m/s occur, the current basket control mode is difficult to meet the safety requirements, and the accident that the basket impacts the blades is easy to occur.

Disclosure of Invention

The invention aims to provide a position control system of a blade repairing platform of a wind generating set, which can improve the stability of a hanging basket and prevent the hanging basket from colliding with blades.

According to an aspect of the invention, there is provided a position control system for a blade repair platform of a wind turbine generator system, the blade repair platform comprising a nacelle and a lifting rope suspending the nacelle, the position control system comprising: the annular fixing piece is sleeved on a tower cylinder of the wind generating set and can move in the vertical direction along the tower cylinder; the traction mechanism is arranged on one side of the annular fixed piece close to the hanging basket; the first rope is connected with the traction mechanism and the hanging basket, and the traction mechanism can release or withdraw the first rope so as to control the distance between the hanging basket and the to-be-repaired blade of the wind generating set; an anchor line, a first end of which is connected to the gondola, and a second end of which is connected to the control point. According to the positioning principle, the position control system can ensure the stability of the hanging basket no matter how the wind direction changes through the traction mechanism, the first rope and the anchoring rope, and prevent the hanging basket from shaking violently under the condition of strong wind to cause safety accidents.

Alternatively, the traction mechanism may be a constant tension system that maintains the tension of the first rope within a predetermined range by controlling the extension or retraction of the first rope. According to the present application, by setting the tension of the first rope within a predetermined range, it is possible to prevent the rope from being snapped while preventing the basket from colliding with the blade.

Alternatively, the constant tension system may include a tension sensor that senses the tension of the first rope and a controller that controls the extension or retraction of the first rope based on the tension measured by the tension sensor.

Alternatively, the traction mechanism may be a hydraulic telescoping device or a spring device. In this case, the traction mechanism can be realized by a simple structure.

Optionally, the position control system may further include a positioning guide guiding the annular fixing member to move in a vertical direction, and both ends of the positioning guide may be respectively fixed to the nacelle of the wind turbine generator system and the outer platform of the tower. By providing the positioning guide, the annular fixing member can be prevented from being skewed when moving up and down.

Optionally, the traction mechanism may be connected to the positioning guide and slidable along the positioning guide. Since the pulling mechanism is fixed to the ring-shaped fixing member, the ring-shaped fixing member can be connected to the positioning guide by the pulling mechanism.

Alternatively, the number of the positioning guides may be two, and the two positioning guides may be respectively disposed on two sides of the tower. By such an arrangement, the ring-shaped fixing member can be more effectively prevented from being not inclined when moving up and down.

Optionally, the annular fixing member is retractable in a circumferential direction of the tower. Thus, the annular fixture can be moved up and down along the tower of varying diameter.

Alternatively, the ring-shaped fixture may be divided into multiple valve rings in the circumferential direction, and the multiple valve rings may be connected to each other by a spring.

Alternatively, the ring-shaped fixing member may be divided into multiple ring-shaped rings in the circumferential direction, the multiple ring-shaped rings may be connected to each other by a second rope, and the constant tension system maintains the tension of the second rope within a predetermined range by controlling the retraction and release of the second rope.

Optionally, the inner surface of the annular fixed member contacting the tower may be provided with rollers. The annular fixing piece can roll up and down along the tower drum through the roller, so that the outer wall of the tower drum can be prevented from being abraded.

Alternatively, the number of anchoring lines may be two, the two anchoring lines being progressively distanced from each other in a direction away from the gondola.

Alternatively, the wind park may be an offshore wind park, the control point being provided on the vessel between two anchor lines, each anchor line being secured to the control point by being passed through a connecting slip ring secured to the anchor point and then looped back in the opposite direction.

According to the position control system, the stability of the hanging basket can be guaranteed no matter how the wind direction changes through the traction mechanism, the first rope and the anchoring rope, and the hanging basket is prevented from shaking violently under the condition of strong wind to cause safety accidents.

In addition, according to the invention, the annular fixing piece is telescopic along the annular direction, so that the annular fixing piece can be ensured to move up and down along the tower barrel with the diameter changing.

Drawings

FIG. 1 is a front view of a position control system of a blade repair platform of a wind park according to an embodiment of the present invention;

FIG. 2 is a side view of the position control system of FIG. 1;

FIG. 3 is a top plan view of the shipboard control portion of the position control system of FIG. 1;

fig. 4 is a schematic view of a looped telescopic arm according to an embodiment of the present invention.

Detailed Description

Hereinafter, a position control system of a blade repairing platform of a wind turbine generator set according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 4.

As described in the background section, the position control system according to the present invention is more efficient for blade repair platforms of offshore wind turbine generators, since offshore climate conditions are worse than onshore climate conditions. Therefore, the case where the wind turbine generator set is an offshore wind turbine generator set will be described below with reference to fig. 1 to 4, however, the wind turbine generator set according to the present invention may also be an onshore wind turbine generator set.

As shown in fig. 1 and 2, the wind turbine may include a tower 1, a nacelle (not shown) disposed atop the tower 1, and blades (not shown) mounted on the nacelle. The outer wall of the tower 1 may be provided with an outer platform 2, and the outer platform 2 may be a foundation outer platform, although the invention is not limited thereto.

According to an embodiment of the invention, the blade repair platform may comprise a gondola 3 and a lifting rope 4 suspending the gondola 3 above the gondola 3.

According to an embodiment of the invention, at least two hoisting ropes 4 may be provided as required in order to ensure stability or levelness of the gondola 3. For example, an example of providing two lift cords 4 is shown in fig. 1 and 2. The lower ends of the two lifting ropes 4 can be fixed to the two sides of the nacelle 3, respectively, and the upper ends of the lifting ropes 4 can be fixed to safety anchors in the nacelle. The hoisting ropes 4 can adjust the up-and-down movement of the gondola 3 by means of a hoisting device. For example, the lifting device may be an electric hoist, a manual hydraulic pump, or the like.

As shown in fig. 1 to 3, a position control system according to an embodiment of the present invention may include: the annular fixing piece 10 is sleeved on the tower barrel 1 of the wind generating set and can move in the vertical direction along the tower barrel 1; a traction mechanism fixed to one side of the annular fixing member 10 close to the basket 3; a first rope 22 connecting the traction mechanism 21 and the nacelle 3, the traction mechanism 21 being capable of releasing or retracting the first rope 22 to control the spacing between the nacelle 3 and the blades of the wind turbine generator system to be repaired; an anchoring line 30, a first end of the anchoring line 30 being connected to the gondola 3 and a second end of the anchoring line 30 being connected to the control point 71.

According to an embodiment of the present invention, as shown in fig. 2, the upper end of the basket 3 is suspended by the hoist rope 4, the left side of the basket 3 is fixed to the ring fixture 10 by the traction mechanism 21 and the first rope 22, and the lower end of the basket 3 is connected to the control point 71 by the anchor rope 30, so that the basket 3 can be fixed at a desired position. Hereinafter, respective components of the position control system according to the embodiment of the present invention will be described in detail.

According to an embodiment of the present invention, the ring fixture 10 may be used to fix the traction mechanism 21. Specifically, the annular fixing member 10 may be annular and may be sleeved on the tower 1. The ring mount 10 can be moved in the vertical direction along the outer wall of the tower 1, so that the traction means 21 can be moved up and down together with it.

According to an embodiment of the present invention, the inner side of the ring-shaped fixing member 10 contacting the outer arm of the tower 1 may be provided with a roller (not shown), so that the ring-shaped fixing member 10 may roll along the outer wall of the tower 1, thereby effectively preventing the outer wall of the tower 1 from being worn.

According to an embodiment of the present invention, the loop fastener 10 may be raised and lowered to a designated position using a rope (not shown), the upper end of which may be connected to an anchor point in the cabin, and the lower end of which may be connected to any position of the loop fastener 10. The lifting of the rope can be controlled by a hand-pulling or electric hoist, etc., so as to control the movement of the annular fixing member 10 in the vertical direction. In addition, when the loop fastener 10 reaches a predetermined position, the loop fastener 10 may be fixed to the predetermined position by locking the rope by means of a catch or the like known in the art.

According to an embodiment of the invention, the pulling means 21 may be fixed to a side of the ring fixture 10 close to the gondola 3. The first rope 22 may connect the traction mechanism 21 and the gondola 3, the traction mechanism 21 being capable of releasing the first rope 22 to prevent the tension of the first rope 22 being larger than a first threshold value of the first rope 22.

The traction mechanism 21 may be any device capable of performing the releasing, pulling and holding according to an embodiment of the present invention. According to an embodiment of the invention, the gondola 3 is connected to the tower 1 via the first rope 22 and the pulling mechanism 21, so that the function of releasing, pulling and holding the gondola 3 can be performed. Specifically, the traction mechanism 21 may pull the gondola 3, maintain the horizontal position of the gondola 3 in fig. 2, and may prevent the first rope 22 from a snap-off accident by releasing the first rope 22 to prevent the tension of the first rope 22 from being greater than its first threshold. The first threshold value may be m% of the ultimate tension at which the first rope 22 is not damaged, which m may be set by a person skilled in the art according to specific needs.

If the pulling mechanism 21 and the first rope 22 are not provided as in the prior art, the basket 3 is blown to the right when wind blows from the tower 1 to the right in the direction of the blades, causing the basket 3 to hit the blades, although the anchoring rope 30 is stretched under the basket 3, as shown in fig. 2. In this regard, if only ropes are provided to connect the tower and the nacelle to pull the nacelle, the ropes may be snapped when the tension of the ropes is excessive, which may cause a more serious safety accident.

Hereinafter, several specific examples of the traction mechanism will be described.

According to one embodiment of the invention, as shown in fig. 1 and 2, the traction mechanism 21 may be a constant tension system fixed to the ring fixture 10. The constant tension system can maintain the tension of the first rope 22 within a predetermined range by controlling the extension or retraction of the first rope 22. Wherein the predetermined range of tension may be determined based on a tension limit value of the first rope 22.

According to an embodiment of the present invention, the constant tension system may include a tension sensor that senses the tension of the first rope 22 and a controller that controls the pay-off and take-up of the first rope 22 based on the tension measured by the tension sensor. Specifically, the first rope 22 may be wound on, for example, a winch, and the controller may control the unwinding and winding of the winch by controlling a hydraulic pump that drives the winch, thereby controlling the unwinding and winding of the first rope 22. However, the specific structure of the constant tension system is not limited thereto as long as it can control the retraction of the first rope 22 to keep the tension of the first rope 22 within a predetermined range.

As shown in fig. 2, when the gondola 3 is blown by the wind toward the right side, the tension of the first rope 22 becomes large, and when the tension sensed by the tension sensor is greater than the upper limit value of the predetermined range, the constant tension system may pay out a part of the first rope 22, thereby ensuring that the tension of the first rope 22 is within the predetermined range. When the gondola 3 is blown by the wind toward the left side, the tension of the first rope 22 becomes small, and when the tension sensed by the tension sensor is less than the lower limit value of the predetermined range, the constant tension system may retract a part of the first rope 22, thereby ensuring that the tension of the first rope 22 is within the predetermined range.

According to an embodiment of the present invention, the traction mechanism 21 may also be a hydraulic telescopic device or a spring device. In this case, when the basket 3 is blown, the hydraulic telescopic device or the spring device may release the first rope 22 by being extended to prevent the basket 3 from colliding with the blades while preventing the rope from snapping. It will be appreciated that the hydraulic telescopic means or spring means are set to bring the gondola 3 into collision with the blade under a predetermined wind force. The predetermined wind power may be a maximum wind power of a place where the wind turbine generator set is installed or a maximum wind power in a case where a prescribed work is possible.

According to an embodiment of the invention, as shown in fig. 3, the position control system may comprise two anchoring ropes 30 arranged on both sides of the bottom of the basket 3, the two anchoring ropes 30 being spaced apart from each other by an increasing distance in a direction away from the basket 3. For better control of the gondola 3, the angle between the two anchoring lines 30 can be suitably increased. Of course, the number of the anchoring ropes 30 can be four or six, and the anchoring ropes are distributed on two sides of the hanging basket as symmetrically as possible.

According to an embodiment of the present invention, as shown in fig. 3, each anchoring rope 30 is fixed to the control point 71 by passing through the connecting slip ring 50 fixed to the anchor point 60 and then winding back in the reverse direction. According to an embodiment of the invention, the control point 71 may be provided on a vessel 70 (an operation and maintenance vessel or other vessel capable of providing positioning capabilities) moored at sea, and the vessel 70 may be located between two anchoring lines 30. Additionally, anchor points 60 may be secured to the seabed.

According to an embodiment of the invention, the operator may control the retraction of the anchoring rope 30 at the control point 71 by means of a hand-pull or electric block or the like, thereby adjusting the horizontal position of the gondola 3 in fig. 1. In addition, an electric hoist can be arranged on the hanging basket 3, and a worker on the right hanging basket controls the electric hoist.

According to an embodiment of the present invention, when the wind turbine generator system is an onshore wind turbine generator system, the control point 71 may be disposed on other equipment having a positioning capability, without being particularly limited.

The position control system according to an embodiment of the present invention may further include a positioning guide 40 guiding the ring fixture 10 to move up and down in a vertical direction, and both ends of the positioning guide 40 may be fixed to the nacelle and the outer platform 2 of the wind turbine generator set, respectively.

As one example, the positioning guide 40 may be a wire rope or a rail. When the positioning guide 40 is a wire rope, one wire rope as shown in fig. 1 and 2 may be provided. In addition, another steel wire rope symmetrical to the steel wire rope in fig. 2 may be further disposed on the left side of the tower barrel 1 in fig. 2, so as to ensure that the ring-shaped fixing member 10 does not skew when moving up and down. Under the working state, the steel wire rope can be in a tight state.

The side of the ring fixture 10 adjacent to the basket 3 may be connected to the positioning guide 40 by a strop and may slide along the positioning guide 40.

In addition, when the traction mechanism 21 is fixed to the ring fixture 10, the traction mechanism 21 may be connected to the positioning guide 40 by a strop. In this case, both sides of the traction mechanism 21 may be defined by the ring fixture 10 and the positioning guide 40, respectively, and thus the traction mechanism 21 may be prevented from being arbitrarily turned and rotated.

According to the application, the positioning guide piece is arranged, so that the annular fixing piece can be prevented from being dislocated when moving up and down and being incapable of ensuring the horizontal position.

According to the embodiment of the invention, since the diameter of the tower 1 is gradually reduced from bottom to top, in order to ensure that the annular fixing member 10 can smoothly move up and down along the tower 1, the annular fixing member 10 may be retractable in the circumferential direction of the tower 1.

As an example, as shown in fig. 4, the ring-shaped fixing member 10 is divided into multiple valve rings 11 along the circumferential direction of the tower 1, and the multiple valve rings 11 are connected to each other by springs 12. Due to the arrangement of the springs between the multi-lobed rings 11, the annular fixing member 10 can be contracted, so that when the diameter of the tower 1 changes, the annular fixing member 10 can be always fastened to the tower 1.

As another example, when the pulling mechanism 21 is a constant tension system as described above, the multi-lobed rings 11 may also be connected to each other by a second rope. The retraction of the second rope 21 can be controlled by a constant tension system to maintain the tension of the second rope within a predetermined range, thereby ensuring that the loop fastener 10 is always fastened to the tower 1. Specifically, the constant tension system may include another tension sensor, another hydraulic pump, and another winch different from the tension sensor, the hydraulic pump, and the winch that control the first rope 22, the second rope may be wound around the other winch, another tension sensor may sense the tension of the second rope, and the controller may control another hydraulic pump to drive the winding and unwinding of the other winch, thereby controlling the winding and unwinding of the second rope, so that the ring fixture 10 may be always fixed on the tower 1.

For example, when the diameter of the tower 1 is smaller, another tension sensor senses that the tension of the second rope is reduced, and the second rope is tightened, so that the diameter of the annular fixing member 10 is reduced along with the reduction of the diameter of the tower 1; in addition, when the diameter of the tower 1 is increased, another tension sensor senses that the tension of the second rope is increased, and the second rope is paid out, so that the diameter of the annular fixing member 10 is increased along with the increase of the diameter of the tower 1. Thus, it is ensured that the ring fixture 10 is always fixed to the tower 1 even if the diameter of the tower 1 varies.

However, the specific manner in which the constant tension system controls the second rope is not limited thereto.

The predetermined range of tension may be determined based on the specific material of the second rope such that the second rope does not stretch and is sufficiently tensioned to secure the ring fixture 10 to the tower 1.

According to an embodiment of the present invention, the ring 11 may be made of a high strength aluminum alloy. However, the present invention is not limited thereto, and the ring 11 may be made of other material having sufficient strength.

According to the embodiment of the present invention, the assembling of the multiple valve ring 11 can be performed on site, so as to fix the ring-shaped fixing member 10 on the tower 1.

Hereinafter, a positioning principle of a position control system according to an embodiment of the present invention will be described with reference to fig. 1 to 3.

The horizontal position of the gondola 3 in figure 1 can be controlled by controlling the retraction of the two anchoring lines 30. In addition, when wind blows in the horizontal direction in fig. 1, the balance of the gondola 3 can be increased by applying a moderate pulling force to the tensioned anchoring rope 30.

Further, when wind blows in the horizontal direction in fig. 2, the gondola 3 can be prevented from colliding with the blades by the pulling mechanism 21 as described above.

In this case, when the traction mechanism 21 is a constant tension system, the tension of the first rope 22 becomes large when the basket 3 is blown toward the right side, and when the tension sensed by the tension sensor is out of a predetermined range, the constant tension system may pay out a portion of the first rope 22 to ensure that the tension of the first rope 22 is within the predetermined range, thereby preventing the basket 3 from colliding with the blades. When the gondola 3 is blown to the left, the tension of the first rope 22 becomes small, and when the tension sensed by the tension sensor exceeds a predetermined range, the constant tension system may retract a portion of the first rope 22 to ensure that the tension of the first rope 22 is within the predetermined range. In addition, the nacelle 3 can be prevented from colliding with the tower 1 by pulling the anchor ropes 30.

In addition, when the traction mechanism 21 is a hydraulic telescopic device or a spring device, the hydraulic telescopic device or the spring device can release the first rope 22 by stretching to prevent the basket 3 from colliding with the blades and prevent the rope from being snapped.

According to the positioning principle, the position control system can ensure the stability of the hanging basket no matter how the wind direction changes through the traction mechanism, the first rope and the anchoring rope, and prevent the hanging basket from shaking violently under the condition of strong wind to cause safety accidents.

In addition, according to the invention, when the position control system is used for the offshore wind generating set, after the ship is anchored around the offshore wind generating set, a stable state can be achieved, and then the left and right displacement of the hanging basket can be controlled on the ship, so that the workload and the operation steps of workers working aloft in the hanging basket are reduced, the working efficiency of the workers is increased, and the safety guarantee of the workers is improved.

Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. A position control system of a blade repairing platform of a wind generating set, the blade repairing platform comprising a nacelle (3) and a lifting rope (4) suspending the nacelle (3), characterized in that the position control system comprises:

the annular fixing piece (10) is sleeved on the tower barrel (1) of the wind generating set and can move in the vertical direction along the tower barrel (1);

the traction mechanism (21) is arranged on one side of the annular fixed piece (10) close to the hanging basket (3);

a first rope (22) connecting the traction mechanism (21) and the nacelle (3), the traction mechanism (21) being able to release or retract the first rope (22) to control the spacing between the nacelle (3) and the blades of the wind turbine generator set to be repaired;

an anchoring line (30), a first end of the anchoring line (30) being connected to the basket (3), a second end of the anchoring line (30) being connected to a control point (71),

wherein the traction mechanism (21) is a constant tension system that maintains the tension of the first rope (22) within a predetermined range by controlling the extension or retraction of the first rope (22).

2. The system of claim 1, wherein the constant tension system comprises a tension sensor sensing the tension of the first rope (22) and a controller controlling the extension or retraction of the first rope (22) according to the tension measured by the tension sensor.

3. The system for controlling the position of a blade repair platform of a wind turbine according to claim 1, further comprising a positioning guide (40) for guiding the movement of the annular fixing member (10) in a vertical direction, wherein the two ends of the positioning guide (40) are respectively fixed to a nacelle of the wind turbine and an outer platform (2) of the tower (1).

4. Position control system of a blade repair platform of a wind park according to claim 3, wherein the pulling mechanism (21) is connected to the positioning guide (40) and is slidable along the positioning guide (40).

5. The system for controlling the position of a blade repair platform of a wind turbine generator system according to claim 3, wherein the number of the positioning guides (40) is two, and the two positioning guides (40) are respectively arranged on two sides of the tower (1).

6. The system for controlling the position of a blade repair platform of a wind park according to claim 1, wherein the ring-shaped fixing element (10) is telescopic in the circumferential direction of the tower (1).

7. The system for controlling the position of a blade repair platform of a wind turbine according to claim 6, wherein the ring-shaped fixture (10) is divided into multiple valve rings (11) along the circumferential direction, and the multiple valve rings (11) are connected to each other by springs (12).

8. The position control system of a blade repairing platform of a wind generating set according to claim 6, wherein the ring-shaped fixing member (10) is divided into multiple ring-shaped rings (11) along the circumferential direction, the multiple ring-shaped rings (11) are connected with each other by a second rope, and the constant tension system maintains the tension of the second rope within a predetermined range by controlling the retraction and release of the second rope.

9. The system for controlling the position of a blade repair platform of a wind turbine according to claim 1, characterized in that the inner surface of the annular fixing member (10) in contact with the tower (1) is provided with rollers.

10. Position control system of a blade repairing platform of a wind generating set according to claim 1, characterized in that the number of said anchoring lines (30) is two, the distance separating the two anchoring lines (30) from each other in a direction away from the nacelle (3) gradually increasing.

11. The system of claim 10, wherein the wind turbine is an offshore wind turbine, the control point (71) is provided on a vessel (70) between two anchoring lines (30), and each anchoring line (30) is fixed to the control point (71) by passing through a connecting slip ring (50) fixed to an anchor point (60) and then winding back in the opposite direction.