CN111042993B - Wind turbine tower cooling device - Google Patents

Abstract

The application relates to the technical field of wind power generation, and specifically discloses a wind turbine tower cooling device, which includes a water storage tank, a cooling part and a water flow circulation unit; the water storage tank surrounds the outer circumference of the tower, and the top of the water storage tank is open; the cooling part includes The outer cylinder sleeve is provided with a wrapping layer made of elastic rubber, and the wrapping layer and the outer cylinder sleeve form a pressure space; the water circulation unit includes a cylinder body and a piston arranged in the cylinder body; the outer circumference of the cable is sleeved There is a hoop ring, and the hoop ring is connected with the piston through a connecting rod; the bottom of the cylinder is provided with a first one-way valve and a second one-way valve, the first one-way valve communicates with the water storage tank and the cylinder body, and the second one-way valve Communication and pressure space; the lower part of the outer sleeve is provided with a pressure relief port with a very small diameter that communicates with the pressure space, and the pressure relief port is located at the upper part of the water storage tank and communicated with the water storage tank. The device reduces cable sloshing, prevents twisting of the cable, and promotes cooling of the cable within the tower.

Description

Wind turbine tower cooling device

technical field

The invention relates to the technical field of wind power generation, in particular to a cooling device for a wind turbine tower.

Background technique

The theoretical life of the wind turbine is 20 years, and the top tower cable is suspended. As the unit operates, the cable in the tower will swing accordingly. Although the cable retainer was originally designed to limit the cable swing range, the cable and the The long-term friction between the retainers will cause the cable sheath to wear, and in severe cases, ground discharge will be formed, resulting in huge losses.

Fixing, combing, protecting, cooling and separating this length of cable can minimize safety hazards and reduce maintenance and service time and costs. The addition of a cooling system to the tower door also reduces the heat generated during the operation of the unit as much as possible and prolongs the service life of the electrical components in the tower.

With the continuous increase of the single unit power of the wind turbine, the number of cables in the tower of the wind turbine also increases accordingly. When the wind direction changes, the unit automatically yaws to the wind, or when the unit is generating power under strong wind conditions, in the center of the tower The initially naturally sagging cable will sway up and down from left to right, hitting the side wall of the tower, causing the cable to be twisted and pulled, and have different degrees of friction. In the long run, the cable hits the skin and is damaged due to impact and friction.

The existing solution is generally to wrap a layer of rubber skin on the friction part of the cable to relieve the impact force and reduce friction. Displacement or even falling off, the protection effect is not ideal, and it also needs to be maintained manually, which cannot fundamentally solve the problem. During the operation of the unit, the electrical equipment and the cable itself will have a heat release effect. The cable will age in advance in a hot environment for a long time. Therefore, the heat dissipation of the cable and the tower is also the key to cable protection.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a wind turbine tower cooling device, so as to reduce the shaking of the cable, prevent the cable from twisting, and promote the heat dissipation of the cable in the tower.

The wind turbine tower cooling device includes a water storage tank arranged outside the tower, a cooling part arranged in the tower, and a water circulation unit arranged above the cooling part; the water storage tank surrounds the outer circumference of the tower, and the water storage tank The top of the cooling part is opened; the cooling part includes an outer sleeve, the outer sleeve is provided with a wrapping layer made of elastic rubber, the wrapping layer and the outer sleeve form a pressure space, and the pressure space is provided with a pipe running through the pressure space body, both ends of the tube body are open;

The water circulation unit includes a cylinder body and a piston arranged in the cylinder body, and the piston can only reciprocate and slide along the axial direction of the cylinder body; a tightening ring is sleeved on the outer circumference of the cable, and the tightening ring is connected with the piston through a connecting rod; the cylinder The bottom of the body is provided with a first one-way valve and a second one-way valve, the inlet end of the first one-way valve is connected to the water storage tank, the outlet end of the first one-way valve is connected to the cylinder body, and the inlet end of the second one-way valve is connected to The cylinder body, the outlet end of the second one-way valve is connected to the pressure space; the lower part of the outer sleeve is provided with a pressure relief port that communicates with the pressure space, the diameter of the pressure relief port is 0.2mm-0.6mm, and the pressure relief port is located in the accumulator. The upper part of the water tank is communicated with the water storage tank.

The principle of this scheme is:

Since the clamping ring is fastened on the outer circumference of the cable, when the cable swings, the cable will drive the piston in the cylinder to move through the clamping ring; when the piston slides inside the cylinder, the space inside the cylinder will change. When the space inside the cylinder increases, the cylinder will suck the water in the water storage tank through the first one-way valve; and when the space in the cylinder decreases, the cylinder will flow into the pressure space through the second one-way valve Press into the water. As the water in the pressure space continues to increase, the pressure in the pressure space continues to increase, so that the wrap will expand towards the middle to grip the cable. The faster the vibration rate of the cable and the higher the vibration amplitude, the higher the rate of the cylinder supplying water into the pressure space, the greater the pressure in the pressure space, and the greater the strength of the wrapping layer to hold the cable, reducing cable vibration and damage. The ability to slide is also stronger, which can reduce the twisting and pulling of the cable to a certain extent. When the cable stops vibrating, the pressure in the pressure space will be released through the pressure relief port, so that there will be a gap between the wrapping layer and the cable, so that multiple cables will be loosened, which is conducive to the heat dissipation of the cable.

The beneficial effects of this program are:

(1) The cable is wrapped by a wrapping layer, and the wrapping layer is made of elastic rubber. By injecting water into the pressure space to increase the pressure in the pressure space, the wrapping layer can be deformed, so that the wrapping layer grips the cable and can lower the cable It can prevent the twisting and repeated pulling of the cable, and reduce the friction between the cable and the side wall of the tower or other side walls. In addition, the wrapping layer is made of rubber to form a flexible state, so that damage to the cable can be avoided by the wrapping layer.

(2) After the cable is tightened by the wrapping layer, the gap between the cable and the cable is reduced, so that the heat dissipation capacity of the cable itself is reduced; at this time, the water injected into the pressure space from the water storage tank surrounds the outer periphery of the cable, so that the water The heat dissipation of the cable is absorbed, which can accelerate the diffusion of heat.

(3) After the cable stops shaking, the cylinder will stop injecting water into the pressure space; while the wrapping layer is still in a deformed state, a large pressure is still maintained in the pressure space. Under the action of this pressure, the pressure space The water inside will be discharged through the pressure relief port, so that the wrapping layer will loosen the cable, so that there will be a gap in the cable, which is conducive to the heat dissipation of the cable.

Preferred solution 1: As a further optimization of the basic solution, there are multiple water circulation units, and the connecting rod and the piston, and the connecting rod and the clamping ring are all connected by spherical hinges. Both ends of the connecting rod are connected with the piston and the hoop ring by ball joints, which can prevent the connecting rod from being broken by the bending moment; in addition, by setting up multiple water circulation units, the cable moves in all directions, which can drive the piston in the cylinder. Movement in the body to increase the water supply of the cylinder to the pressure space.

Preferred solution 2: As a further optimization of preferred solution 1, the cylinder of one of the water circulation units is provided with a reciprocating transmission rod, the reciprocating transmission rod penetrates the piston, and the reciprocating transmission rod and the piston pass through the intermeshing spiral groove and The spiral ridges cooperate, and when the piston slides back and forth relative to the cylinder body, the reciprocating transmission rod will reciprocate; the end of the reciprocating transmission rod is fixed with a worm, and the drum and the rotating shaft are rotated in the horizontal direction in the tower, and the drum is connected. The first one-way bearing is rotatably connected with the side wall of the tower, the rotating shaft is connected with a worm wheel through the second one-way bearing, and the worm is matched with the worm wheel; the rotating shaft is fixed with a first sprocket, and the drum is fixedly connected with a second The sprocket, the first sprocket and the second sprocket are connected by a chain.

In the preferred solution 2, when the cable drives the piston to slide back and forth in the cylinder, the reciprocating transmission rod will rotate back and forth, thereby driving the worm to rotate back and forth, and then the worm will drive the worm wheel to rotate back and forth; since the worm wheel passes through the second one-way bearing and rotates The shaft is connected, so the worm gear can transmit torque to the rotating shaft only when it is rotating forward, so that the rotating shaft can rotate forward with clearance, that is, the rotating rod drives the reel to rotate through the chain transmission relationship formed by the first sprocket, the second sprocket and the chain. , so that the cable can be further wound.

The swing of the cable is related to the slack state of the cable. The greater the amplitude of the cable swing, the more slack the cable is; and as the cable is in the swing state for a long time, the cable will fall. In this preferred solution, the worm wheel is driven to rotate by the swing of the cable, and because the transmission ratio of the worm wheel and the worm is large, it also has the effect of amplifying the moment; The barrel wraps the cable to pull the cable and reduce the swing of the cable. The reel is rotatably connected to the side wall of the tower through the first one-way bearing, which can prevent the cable wound on the reel from loosening due to the reverse rotation of the reel.

Preferred solution 3: As a further optimization of the preferred solution 2, the surface of the reel is provided with a nylon layer to prevent the cable wound on the reel from sliding relative to the surface of the reel.

Preferred solution 4: As a further optimization of the preferred solution 3, a non-slip layer made of nylon is provided on the outer wall of the wrapping layer. By arranging the anti-skid layer, when the wrapping layer holds the cable tightly, the probability of preventing the cable from sliding relative to the wrapping layer can be reduced, which is beneficial to protect the wrapping layer on the one hand and the outer layer of the cable layer on the other hand.

Preferred solution 5: As a further optimization of the preferred solution 4, the distance between the water circulation unit and the cooling part is set to 1.5m-3m. The farther the cable is from the outer sleeve, the greater the vibration amplitude of the cable, and the greater the air supply from the cylinder to the pressure space.

Preferred solution 6: As a further optimization of the preferred solution 5, the tube body is arranged in the vertical direction, so that an upward flowing air flow is formed in the tube body, thereby facilitating the temperature to be dissipated outward and improving the heat dissipation efficiency.

Description of drawings

1 is a schematic diagram of an embodiment of the present invention;

Fig. 2 is the sectional view of the cooling part of the present invention;

Fig. 3 is the enlarged view of A part in Fig. 1;

Figure 4 is a schematic diagram of the structure of the reel of the present invention.

Detailed ways

The following is further described in detail by specific embodiments:

Reference numerals in the drawings include: tower 10, cable 20, clamping ring 30, water circulation unit 40, cylinder 41, piston 42, first check valve 43, second check valve 44, connecting rod 45. Mounting plate 46, reciprocating transmission rod 47, cooling part 50, outer cylinder sleeve 51, pipe body 52, pressure space 53, wrapping layer 55, anti-skid layer 56, rib plate 57, reel 60, second sprocket 61, The worm 71 , the worm wheel 72 , the first sprocket 73 , the rotating rod 74 , and the water storage tank 80 .

As shown in FIG. 1 , the wind turbine tower cooling device includes a water storage tank 80 , a cooling part 50 and three water circulation units 40 . As shown in FIG. 1 , the water storage tank 80 is a trough-like structure surrounding the outer circumference of the tower 10 , and the top of the water storage tank 80 is open, so that the water storage tank 80 stores rainwater for cooling water. As shown in FIG. 2 , the cooling part 50 includes an outer sleeve 51 made of an aluminum alloy material and a wrapping layer 55 made of an elastic rubber material. In this embodiment, the outer sleeve 51 is configured as a circular tube, and eight tubular bodies 52 are evenly arranged in the outer sleeve 51 along its circumferential direction, and the upper and lower ends of the tubular bodies 52 are open. The upper and lower ends of the outer sleeve 51 are welded with annular sealing plates, the wrapping layer 55 is curled into a cylindrical shape, and the wrapping layer 55 is bonded to the inner ring of the sealing plate, and the part in contact with the tube body 52 is bonded to the tube body 52 , so that the outer sleeve 51 , the sealing plate and the wrapping layer 55 enclose the pressure space 53 , that is, filling the medium into the pressure space 53 will increase the pressure in the pressure space 53 , and the wrapping layer 55 will expand to the middle. The pipe body 52 is arranged along the axis of the outer sleeve 51 , and the two ends of the pipe body 52 respectively penetrate the sealing plates at both ends of the outer sleeve 51 . Since the pipe body 52 divides the pressure space 53 into a plurality of regions, a gap of 1 mm is provided between the outer wall of the pipe body 52 and the inner wall of the outer sleeve 51 in order to keep the entire pressure space 53 in a state of communication with each other.

As shown in FIG. 3 , the water circulation device includes a cylinder 41 and a piston 42 slidably connected in the cylinder 41 , and the inner side wall of the piston 42 is provided with a guide edge arranged along the axial direction of the piston 42 , and the guide edge is connected to the piston 42 . 42 forms a fit, so that the piston 42 can only slide back and forth in the axial direction of the cylinder 41 . The outer circumference of the cable 20 is provided with a hoop ring 30, and the hoop ring 30 is used to fasten a plurality of cables 20 to prevent the cables 20 from spreading; in order to prevent the cables 20 from being close to each other and affecting the heat dissipation of the cables 20, the hoop ring 30 is provided with A ferrule that can only pass a single cable, and there is a certain gap between the ferrule and the ferrule, so that there is a gap between the cables in the tightening ring 30 for heat dissipation. The outer peripheral surface of the tightening ring 30 is provided with three connecting ribs, and the connecting ribs are evenly distributed along the circumferential direction of the tightening ring 30 . The piston 42 of each water circulation device is connected to the piston 42 through the connecting rod 45. The specific connection method is that one end of the connecting rod 45 is connected to the center ball of the piston 42, and the other end of the connecting rod 45 is connected to one of the clamping rings 30. Convex ball connection.

In the specific installation, the cooling part 50 is first fixed on the inside of the tower 10, and the outer sleeve 51 of the cooling part 50 is provided with a rib 57, and the outer sleeve 51 passes through the rib 57 and the inner side of the tower 10. The wall is fixed, and the axes of the outer sleeve 51 and the pipe body 52 are arranged in the vertical direction; The water circulation device is installed above the cooling part 50, and the distance between the water circulation device and the cooling part 50 is set to 2.5m. As shown in FIG. 1 , the cylinder 41 of the water circulation device is fixed on the inner wall of the tower 10 through the mounting plate 46 , and the three cylinders 41 are evenly distributed along the circumferential direction of the clamping ring 30 .

As shown in FIG. 3 , the bottom of the cylinder block 41 is provided with a first one-way valve 43 and a second one-way valve 44. The first one-way valve 43 is used to supply the water in the water storage tank 80 into the cylinder block 41; The two one-way valves 44 are connected to the pressure space 53 , so that the water in the pressure space 53 can be pressed into the pressure space 53 . Specifically, the inlet end of the first check valve 43 communicates with the water storage tank 80, and the outlet end of the first check valve 43 communicates with the cylinder 41; the inlet end of the second check valve 44 communicates with the cylinder 41, and the first check valve 44 communicates with the cylinder 41. The outlet ends of the two one-way valves 44 are connected to the pressure space 53 .

When the cable 20 swings, the cable 20 will drive the piston 42 in the cylinder 41 to move through the tightening ring 30; when the piston 42 slides inside the cylinder 41, the cylinder 41 will pass through the second check valve 44 to the pressure space 53 Water is pressed in so that the wrap 55 will expand in the middle to grip the cable 20, thereby reducing vibration and slippage of the cable 20. The faster the vibration rate of the cable 20 and the higher the vibration amplitude, the higher the speed of the cylinder 41 supplying water into the pressure space 53, the greater the pressure in the pressure space 53, so the strength of the wrapping layer 55 to hold the cable 20 is also higher. The larger it is, the greater the ability to reduce vibration and slippage of the cable 20. When the wrapping layer 55 holds the cables 20 tightly, the cables 20 are close to each other, the smaller the gap between the cables 20, the lower the heat dissipation capacity of the cables 20, and at this time, the water surrounds the outer circumference of the cables 20, which can strengthen the cables 20 in the tower 10. cooling efficiency.

A pressure relief port with a diameter of 0.4 mm is provided on the side wall of the outer cylinder, and the pressure relief port is returned to the water storage tank 80 through a pipeline, so that water can be reused. After the cable 20 stops vibrating, the pressure in the pressure space 53 will be released through the pressure relief port, so that a gap will appear between the wrapping layer 55 and the cable 20 , thereby promoting the heat dissipation of the cable 20 .

The outer wall of the wrapping layer 55 is provided with a non-slip layer 56 made of nylon, so that when the wrapping layer 55 grips the cable 20, the probability of preventing the cable 20 from sliding relative to the wrapping layer 55 can be reduced, and on the one hand, it is beneficial to protect the wrapping layer 55, On the other hand, it is advantageous to protect the outer layer of the cable 20 .

As shown in FIG. 1 , a reel 60 is provided two meters above the cooling part 50, and the reel 60 is rotatably connected to the side wall of the tower 10 through a first one-way bearing. Can turn forward. As shown in FIG. 4 , the cable 20 is wound on the reel 60 for 3 to 4 turns, and when the reel 60 rotates forwardly, the reel 60 will continue to wind the cable 20, thereby pulling the cable 20; and In order to prevent the cable 20 from sliding relative to the reel 60, the surface of the reel 60 is provided with a nylon layer. As shown in FIG. 1 , a reciprocating transmission rod 47 is rotatably connected to the cylinder block 41 of one of the water circulation units 40, and the reciprocating transmission rod 47 is arranged in parallel with the axial direction of the cylinder block 41; one end of the reciprocating transmission rod 47 is set on the cylinder block The other end of the reciprocating transmission rod 47 is located outside the cylinder 41 and is rotatably connected with the side wall of the tower 10 . As shown in FIG. 3 , the reciprocating transmission rod 47 and the piston 42 form a connection relationship through the cooperating helical grooves and helical ridges. When the piston 42 reciprocates relative to the cylinder 41, the reciprocating transmission rod 47 will reciprocate. A section of the reciprocating transmission rod 47 located outside the cylinder body 41 is a worm 71, a horizontally arranged rotating shaft is arranged above the worm 71, and both ends of the rotating shaft are rotatably connected with the side wall of the tower 10; A worm wheel 72 is connected to the bearing, and the worm wheel 72 cooperates with the worm 71, and the reciprocating rotation of the worm 71 will drive the worm wheel 72 to reciprocate. The first sprocket 73 is fixed on the rotating shaft, the second sprocket 61 is fixed on the reel 60, and the first sprocket 73 and the second sprocket 61 are connected by a chain; 20 drives the piston 42 to vibrate back and forth, and the worm 71 will slowly drive the reel 60 to rotate forward, so that the cable 20 can be pulled up. In addition, as the wrapping layer 55 grips the cable 20 so that the cable 20 cannot slide relative to the cooling part 50 , the wrapping layer 55 and the reel 60 cooperate to tighten the cable 20 , thereby reducing the cable 20 from swinging and avoiding the cable 20 and the side The wall impact causes damage to the skin of the cable 20 .

In addition, the swing of the cable 20 will make the water circulation part pump the water in the water storage tank 80 into the pressure space 53 , and the greater the amplitude of the cable 20 , the water can be accelerated into the pressure space 53 to cool the cable 20 . When the cable 20 stops swinging or the amplitude of the cable 20 is weakened, the water in the pressure space 53 slowly returns to the water storage tank 80 through the pressure relief port under its own pressure, so as to pass the circulation exchange of the water inside and outside the tower 10, The cooling efficiency in the tower 10 can be improved.

The above descriptions are only embodiments of the present invention, and common knowledge such as well-known specific structures and characteristics in the solution are not described too much here. It should be pointed out that for those skilled in the art, some modifications and improvements can be made without departing from the structure of the present invention. These should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effectiveness and utility of patents. The scope of protection claimed in this application shall be based on the content of the claims, and the descriptions of the specific implementation manners in the description can be used to interpret the content of the claims.

Claims (7)

1. Wind turbine tower cooling device, it is characterized in that: comprise the water storage tank that is arranged on the outside of the tower, the cooling part that is arranged in the tower and the water circulation unit that is arranged above the cooling part; the water storage tank surrounds the tower the outer circumference of the cylinder, and the top of the water storage tank is open; the cooling part includes an outer cylinder sleeve, and the outer cylinder sleeve is provided with a wrapping layer made of elastic rubber, the wrapping layer and the outer cylinder sleeve form a pressure space, and the pressure space is There is a pipe body running through the pressure space, and both ends of the pipe body are open; The water circulation unit includes a cylinder body and a piston arranged in the cylinder body, and the piston can only reciprocate and slide along the axial direction of the cylinder body; a tightening ring is sleeved on the outer circumference of the cable, and the tightening ring is connected with the piston through a connecting rod; the cylinder The bottom of the body is provided with a first one-way valve and a second one-way valve, the inlet end of the first one-way valve is connected to the water storage tank, the outlet end of the first one-way valve is connected to the cylinder body, and the inlet end of the second one-way valve is connected to The cylinder body, the outlet end of the second one-way valve is connected to the pressure space; the lower part of the outer sleeve is provided with a pressure relief port that communicates with the pressure space, the diameter of the pressure relief port is 0.2mm-0.6mm, and the pressure relief port is located in the accumulator. The upper part of the water tank is communicated with the water storage tank. 2 . The wind turbine tower cooling device according to claim 1 , wherein a plurality of the water circulation units are provided, and the connecting rod and the piston, and the connecting rod and the hoop ring are all connected by spherical hinges. 3 . 3. The wind turbine tower cooling device according to claim 2, wherein a reciprocating transmission rod is provided in the cylinder of one of the water flow circulation units, the reciprocating transmission rod penetrates the piston, and the reciprocating transmission rod and the piston are provided with a reciprocating transmission rod. Through the cooperation of the intermeshing spiral grooves and the spiral ridges, when the piston slides back and forth relative to the cylinder body, the reciprocating transmission rod will reciprocate; the end of the reciprocating transmission rod is fixed with a worm, and the inside of the tower is rotated in the horizontal direction. The drum and the rotating shaft, and the drum is rotatably connected with the side wall of the tower through the first one-way bearing, the rotating shaft is connected with a worm wheel through the second one-way bearing, and the worm is matched with the worm wheel; the first sprocket is fixed on the rotating shaft, A second sprocket is fixedly connected to the drum, and the first sprocket and the second sprocket are connected by a chain. 4. The wind turbine tower cooling device according to claim 3, wherein a nylon layer is provided on the surface of the drum. 5 . The wind turbine tower cooling device according to claim 4 , wherein a non-slip layer made of nylon is provided on the outer wall of the wrapping layer. 6 . 6 . The wind turbine tower cooling device according to claim 5 , wherein the distance between the water circulation unit and the cooling part is set to 1.5m-3m. 7 . 7 . The cooling device of the wind turbine tower according to claim 6 , wherein the pipe body is arranged in a vertical direction. 8 .

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