CN211174485U - A wind turbine engine room cooling device - Google Patents

Abstract

The present application relates to the technical field of wind power generation, and specifically discloses a wind turbine nacelle heat dissipation device, comprising a tower and a nacelle, the nacelle is located on the top of the tower, one side of the outer wall of the nacelle is connected with a first impeller, and the top of the nacelle is provided with a heat sink hole; the side wall of the nacelle away from the first impeller is open and the filter screen is detachably connected; the side wall of the nacelle away from the first impeller is rotatably connected with a rotating shaft arranged in the horizontal direction, and one end of the rotating shaft away from the first impeller penetrates the side of the nacelle The wall extends to the outside of the cabin; the second impeller is fixed on the part of the rotating shaft outside the cabin, the part of the rotating shaft close to the outer side wall of the cabin is fixed with a brush, and the bristles of the brush fit with the outer side wall of the cabin; the rotating shaft is located in the cabin A fan blade is fixed on the part. The purpose of this patent is to solve the problem of inconvenient replacement of the filter screen.

Description

A wind turbine engine room cooling device

technical field

The utility model relates to the technical field of wind power generation, in particular to a heat dissipation device for a wind turbine engine room.

Background technique

In recent years, the annual growth rate of global renewable energy utilization has reached 25%, and the utilization of renewable energy will be dominated by the power industry. Wind power generation, as the most mature renewable energy power generation technology other than hydropower generation, its installed capacity accounts for the entire The vast majority of the total installed capacity of renewable energy power generation, wind turbines include wind turbines and generators; the wind turbine contains blades, hubs, reinforcements, etc.; . The wind power source is composed of the wind turbine, the tower supporting the generator, the battery charging controller, the inverter, the unloader, the grid-connected controller, the battery, etc. The wind turbine will generate heat during the energy conversion process. , As the power of the generator set increases, the requirements for the heat dissipation device also gradually increase. The existing heat dissipation of the engine room can no longer meet the heat dissipation effect well. If the heat is not dissipated, the aging speed of the components in the engine room will be accelerated.

The Chinese patent with the authorization announcement number CN209261746U discloses a wind turbine nacelle cooling device, including a tower and a nacelle, the nacelle is located on the top of the tower, an impeller is connected to one side of the outer wall of the nacelle, and the inner wall of the nacelle is A hot water absorption pipe is arranged together, a plurality of fixing rings are arranged on the inner wall of the cabin, and the hot water absorption pipe passes through the plurality of fixing rings, and the inner bottom wall of the cabin is vertically connected with a fixing frame, and the fixing frame is located at the end of the heat absorption One side of the water pipe, the top of the fixing frame is connected with a base plate, the same side of the base plate and the impeller is connected with a cooling fan, the tower is connected with a cold water tank, and the top of the engine room is connected with a water supply tank, so A circulating water pipe is communicated between the cold water tank and the water supply tank, and a circulating water pump is connected to the circulating water pipe. A filter screen is provided on the side of the interior of the engine room away from the impeller, and the inner top wall and the inner bottom wall of the engine room are connected to the filter. The positions corresponding to both ends of the net are connected with clamping devices.

In the above scheme, the combination of the hot water pipe, the water supply tank, the cold water tank and the cooling fan can achieve the combination of air cooling and water cooling, and the heat dissipation effect is better; The dust in the gas will be filtered out through the filter screen to reduce the pollution of the dust to the external environment, and the filter screen will be clamped and fixed by the clamping device, which is convenient for disassembly and replacement.

Although the above solution solves the problem of heat dissipation of the engine room, because the height of the tower of the wind turbine is generally 60-100 meters, there is still the problem of inconvenient replacement of the filter screen.

Utility model content

Aiming at the deficiencies of the prior art, the technical problem solved by the present utility model is to provide a wind turbine engine room cooling device, which solves the problem of inconvenient replacement of the filter screen.

In order to solve the above problems, the technical solution adopted by the present invention is as follows: a wind turbine nacelle cooling device, comprising a tower and a nacelle, the nacelle is located on the top of the tower, and one side of the outer wall of the nacelle is connected with a first The impeller, the top of the nacelle is provided with heat dissipation holes; the side wall of the nacelle away from the first impeller is open and detachably connected with a filter screen; the side wall of the nacelle away from the first impeller is rotatably connected along the horizontal direction A rotating shaft is arranged, one end of the rotating shaft away from the first impeller penetrates the side wall of the nacelle and extends to the outside of the nacelle; a second impeller is fixed on the part of the rotating shaft outside the nacelle, and the part of the rotating shaft close to the outer side wall of the nacelle is fixed on There is a brush, the bristles of the brush fit with the outer side wall of the nacelle; the end of the rotating shaft close to the first impeller extends to the interior of the nacelle, and a fan blade is fixed on the part of the rotating shaft inside the nacelle.

The technical principle of this technical solution is as follows: a second impeller is arranged, the wind drives the second impeller to rotate, and the second impeller drives the rotation of the shaft. On the one hand, the rotation of the shaft drives the rotation of the fan blades to accelerate the air circulation inside the nacelle, thereby cooling the nacelle. On the other hand, the rotation of the shaft can drive the brush to rotate, and the brush can brush off the dust on the filter; in addition, the rotation of the second impeller produces a hollow effect, which blows away the dust in the surrounding air, thereby reducing the accumulation of dust on the filter.

The beneficial effects of this solution are: compared with the existing engine room heat dissipation device, the filter screen of the existing engine room heat dissipation device needs to be manually climbed to the top of the tower for disassembly and replacement. In some places, especially the Gobi Desert in Xinjiang and other regions, there is a lot of wind and sand, so the filter screen is extremely easy to block, so the filter screen needs to be replaced frequently, and manual climbing to the top of the tower is labor-intensive. In the solution of the present application, the second impeller is driven by wind to rotate, and the second impeller drives the fan blades and the brush to rotate through the rotating shaft, so as to realize the heat dissipation of the engine room and the automatic cleaning of the filter screen, without manual operation, high safety, and Low labor intensity.

Further, a rotating rod is rotatably connected inside the nacelle; a torsion spring is sleeved on the rotating rod, one end of the torsion spring is fixed on the nacelle, and the other end of the torsion spring is fixed on the rotating rod; the rotating rod and the rotating shaft are arranged coaxially , the rotating rod and the rotating shaft are connected by a torque controller.

The rotation of the rotating shaft drives the rotating rod to rotate and stores the energy of the torsion spring. When the torsion force between the rotating rod and the rotating shaft exceeds the set value of the torque controller, the sliding between the rotating rod and the rotating shaft starts, the rotating shaft continues to rotate and the rotating rod stops rotating; The fan blades continue to rotate to dissipate heat in the cabin; when the wind stops, the torsion controller prevents slippage between the rotating rod and the rotating shaft, the torsion spring drives the rotating rod and the rotating shaft to reverse rapidly in an instant, and the rotating shaft drives the fan blades to rotate rapidly to generate high-speed flow The high-flowing gas blows the dust on the filter out at a high speed to avoid blockage of the filter.

Further, the number of the fan blades is set to two to optimize the heat dissipation effect in the nacelle.

Further, the top of the nacelle is fixed with an "n"-shaped shield cover to prevent sand and rain from entering the nacelle from the heat dissipation holes.

Further, the filter screen is snap-connected with the cabin, so that the filter screen can be easily replaced.

Further, the brush is in the shape of a cuboid, and the circular surface formed when the brush rotates can completely cover the filter screen.

Description of drawings

FIG. 1 is an overall structural diagram of an embodiment of the present utility model.

Detailed ways

The following is further described in detail by specific embodiments:

Reference numerals in the accompanying drawings include: nacelle 10, first impeller 11, filter screen 12, heat dissipation hole 13, cover 14, rotating shaft 20, second impeller 21, brush 22, fan blade 23, torsion spring 24, Rotating rod 25, tower 30.

The embodiment is basically as shown in Figure 1:

A wind turbine nacelle cooling device includes a tower 30 and a nacelle 10. The nacelle 10 is located on the top of the tower 30. As shown in FIG. 1, the shape of the nacelle 10 is a rectangular parallelepiped. An impeller 11, the first impeller 11 is used for power generation, the top of the nacelle 10 is provided with 5 heat dissipation holes 13 evenly spaced, and the top of the nacelle 10 is fixed with a cover 14 with an “n” shape in cross section. 14 Cover all the heat dissipation holes 13 to prevent sand and rain from entering the cabin 10 from the heat dissipation holes 13 .

As shown in FIG. 1 , the right side wall of the nacelle 10 is open and the filter screen 12 is clamped; the right inner side wall of the nacelle 10 is rotatably connected with a rotating shaft 20 arranged in the horizontal direction, the rotating shaft 20 is arranged coaxially with the nacelle 10, and the rotating shaft 20 The right end runs through the filter screen 12 and extends to the outside of the nacelle 10, and the rotating shaft is rotatably connected to the filter screen; a second impeller 21 is fixed on the right end of the rotating shaft 20, and a brush 22 is fixed on the part of the rotating shaft 20 close to the outer side wall of the nacelle 10, and the brush 22 is connected to the rotating shaft. 20 are arranged coaxially, the cross section of the brush 22 is rectangular, the length of the brush 22 is equal to the length of the diagonal of the cross section of the right side wall of the nacelle 10, the bristles of the brush 22 are attached to the outer side wall of the nacelle 10, and the The bristles are plastic bristles, which are anti-corrosion and durable; fan blades 23 are fixed on the part of the rotating shaft 20 located in the nacelle 10 .

The wind drives the second impeller 21 to rotate, and the second impeller 21 drives the rotating shaft 20 to rotate. On the one hand, the rotating shaft 20 rotates and drives the fan blades 23 to rotate to accelerate the air circulation inside the nacelle 10, thereby cooling the nacelle 10; on the other hand, the rotating shaft 20 The rotation can drive the brush 22 to rotate, and the brush 22 can brush off the dust on the filter screen 12; in addition, the rotation of the second impeller 21 forms a hollow effect, so that the dust in the air around the second impeller 21 is blown away, thereby reducing the dust on the filter screen 12. accumulation of dust.

As shown in FIG. 1 , a rotating rod 25 arranged in the horizontal direction is rotatably connected to the left inner wall of the nacelle 10. The rotating rod 25 and the rotating shaft 20 are coaxially arranged, and the rotating shaft 20 and the rotating rod 25 pass through a torque controller (not shown in the figure). ) connection, a torsion spring 24 is sleeved on the rotating rod 25 , one end of the torsion spring 24 is fixed on the nacelle 10 , and the other end of the torsion spring 24 is fixed on the rotating rod 25 .

The rotation of the rotating shaft 20 drives the torsion spring 24 to store energy. When the torsion force between the rotating rod 25 and the rotating shaft 20 exceeds the set value of the torsion controller, the rotating rod 25 and the rotating shaft 20 begin to slip, and the rotating shaft 20 continues to rotate and the rotating rod 25 When the rotation is stopped, the fan blades 23 continue to rotate to dissipate heat in the nacelle 10; when the wind stops, the torsion controller stops the slippage between the rotating rod 25 and the rotating shaft 20, and the torsion spring 24 drives the rotating rod 25 and the rotating shaft 20 to reverse instantly, The rotating shaft 20 drives the fan blades 23 to rotate in a fast reverse direction to generate high-speed flowing gas, and the high-flowing gas blows out the dust on the filter screen 12 at a relatively high speed to prevent the filter screen 12 from being blocked.

The specific implementation process is as follows:

When the wind blows, the wind drives the second impeller 21 to rotate, the second impeller 21 drives the rotating shaft 20 to rotate, the rotating shaft 20 drives the brush 22, the fan blade 23 and the rotating rod 25 to rotate, and the brush 22 rotates to brush off the dust on the filter screen 12. The rotation of the blade 23 realizes heat dissipation in the nacelle 10, and the torsion spring 24 stores energy. When the torsion force between the rotating rod 25 and the rotating shaft 20 exceeds the set value of the torsion controller, the rotating rod 25 and the rotating shaft 20 begin to slip, and the rotating shaft 20 continues to Rotate and the rotating rod 25 stops rotating; the fan blade 23 continues to rotate to dissipate heat in the nacelle 10;

When the wind stops, the torsion controller makes the relationship between the rotating rod 25 and the rotating shaft 20 no longer slip, and the torsion spring 24 drives the rotating rod 25 and the rotating shaft 20 to reverse in an instant to generate high-speed flowing gas. The dust is blown out at a relatively high speed to prevent the filter screen 12 from being blocked.

The above steps are continuously repeated to achieve heat dissipation of the engine room 10 and automatic dust removal of the filter screen 12, thereby reducing the frequency of replacement of the filter screen 12.

The above descriptions are only the embodiments of the present invention, and the common knowledge such as the well-known specific structures and characteristics in the solutions are not described too much here. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present utility model, several deformations and improvements can also be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the present utility model. The effect of the implementation of the new model and the practicability of the patent. 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 (6)

1. A wind turbine nacelle heat sink, comprising a tower and a nacelle, the nacelle is located on the top of the tower, and one side of the outer wall of the nacelle is connected with a first impeller, characterized in that: the top of the nacelle is provided with a heat dissipation hole; the side wall of the nacelle away from the first impeller is open and detachably connected with a filter screen; the side wall of the nacelle away from the first impeller is rotatably connected with a rotating shaft arranged in a horizontal direction, and the rotating shaft is far away from the first impeller One end of the shaft penetrates the side wall of the nacelle and extends to the outside of the nacelle; a second impeller is fixed on the part of the rotating shaft outside the nacelle, and a brush is fixed on the part of the rotating shaft close to the outer side wall of the nacelle, and the bristles of the brush are in contact with the nacelle. The outer side wall is fitted; the end of the rotating shaft close to the first impeller extends to the inside of the nacelle, and a fan blade is fixed on the part of the rotating shaft located in the nacelle. 2. A wind turbine nacelle heat sink according to claim 1, characterized in that: a rotating rod is rotatably connected inside the nacelle; a torsion spring is sleeved on the rotating rod, and one end of the torsion spring is fixed on the nacelle, The other end of the torsion spring is fixed on the rotating rod; the rotating rod and the rotating shaft are arranged coaxially, and the rotating rod and the rotating shaft are connected by a torsion controller. 3 . The wind turbine nacelle cooling device according to claim 1 , wherein the number of the fan blades is set to two. 4 . 4 . The wind turbine nacelle heat sink according to claim 1 , wherein the top of the nacelle is fixed with an “n”-shaped shield cover. 5 . 5 . The wind turbine engine room cooling device according to claim 1 , wherein the filter screen is clamped to the engine room. 6 . 6 . The wind turbine nacelle cooling device according to claim 1 , wherein the brush is in the shape of a cuboid, and the circular surface formed when the brush rotates can completely cover the filter screen. 7 .

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