Wind driven generator cabin structure capable of preventing wind and sand from invading

Abstract

The invention relates to the technical field of fan cabins, and provides a wind driven generator cabin structure capable of preventing wind sand invasion, which comprises a cabin cover, a bottom cabin is arranged below the cabin cover, the bottom cabin is provided with a ventilation pipe communicated with the cabin cover, and a filtering assembly is arranged in the ventilation pipe; the filtering assembly comprises a net-shaped filtering belt, a first belt wheel and a second belt wheel, the net-shaped filtering belt is connected with the first belt wheel and the second belt wheel in a winding mode, and the net-shaped filtering belt is matched with the inner diameter of the ventilation pipe for shielding; the wind-driven impeller is arranged outside the ventilation pipe and coaxially connected with the first belt wheel, and the wind-driven impeller rotates to drive the first belt wheel and the net-shaped filter belt to rotate circularly; the ventilating pipe is externally connected with a sand discharging pipe with a downward pipe opening, and the pipe opening of the sand discharging pipe is close to the lower end of the net-shaped filtering belt. Self-cleaning of the filter screen can be achieved, normal ventilation and filtering effects are guaranteed, and the phenomenon of filtering blockage is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine cabins, and in particular to a cabin structure of a wind turbine generator that is resistant to wind and sand intrusion. Background Art

[0002] A wind turbine is an electric device that converts wind energy into mechanical work, which drives the rotor to rotate and finally outputs alternating current. A wind turbine generally consists of blades, a tower, and a nacelle. The working principle of a wind turbine is relatively simple. The blades rotate under the action of wind, which converts the kinetic energy of the wind into the mechanical energy of the wind rotor shaft. The generator rotates and generates electricity under the drive of the wind rotor shaft. It is usually installed in remote and windy areas. The wind turbine nacelle serves as the protective shell of the wind turbine. Its reliability determines the stability and service life of the wind turbine.

[0003] In windy weather, the wind carries sand and dust directly to various parts of the wind turbine generator set, especially the blades, hubs, nacelles and other external structures. At the same time, the equipment inside the nacelle needs to dissipate heat, and vents are usually set to transport air inward. The nacelle is not a completely sealed structure, and sand shields are usually set at the vents of the nacelle. However, long-term use can easily lead to blockage of the sand shield, affecting the normal heat dissipation inside the nacelle and the normal barrier effect of the sand shield. Summary of the invention

[0004] The object of the present invention is to provide a wind turbine cabin structure that is resistant to wind and sand intrusion, has a more reliable wind and sand protection effect, and has a good ventilation and heat dissipation effect.

[0005] The present invention is achieved through the following technical solutions: a nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion, comprising a nacelle, a bottom nacelle being provided below the nacelle, a ventilation pipe communicating with the nacelle, and a filter assembly being provided in the ventilation pipe; the filter assembly comprising a mesh filter belt, a first pulley and a second pulley, the mesh filter belt being respectively wound around the first pulley and the second pulley, and the mesh filter belt being adapted to be shielded by the inner diameter of the ventilation pipe; a wind-driven impeller being provided outside the ventilation pipe and being coaxially connected to the first pulley, the wind-driven impeller rotating to drive the first pulley and the mesh filter belt to circulate; the ventilation pipe being externally connected to a sand discharge pipe with a pipe opening facing downward, the pipe opening of the sand discharge pipe being close to the lower end of the mesh filter belt.

[0006] Furthermore, the two side edges of the mesh filter belt are provided with tracks corresponding to the first pulley, and a plurality of groups of cleaning needle brushes are evenly distributed around the first pulley; the inner wall of the sand discharge pipe is installed with a first cleaning brush and a second cleaning brush in contact with the mesh filter belt, and the first cleaning brush and the second cleaning brush are respectively arranged on both sides of the first pulley.

[0007] Furthermore, it also includes a vibrating cam, which is arranged on the inner side of the mesh filter belt, and the mesh filter belt is periodically hit by the rotation of the vibrating cam.

[0008] Furthermore, the mesh filter belt is arranged to be inclined toward one side of the sand discharge pipe.

[0009] Furthermore, a refrigeration device is installed in the bottom cabin, and a temperature-conducting ring is provided in the ventilation duct and is in contact with the inner wall thereof. The temperature-conducting ring is connected to the refrigeration device, and a plurality of fins are arranged alternately on the temperature-conducting ring. A drain outlet is provided at the bottom of the ventilation duct, and the position of the drain outlet corresponds to the lower end of the fin.

[0010] Furthermore, the fins are arranged in an inclined shape, and the fins are inclined toward one side of the drain outlet.

[0011] Furthermore, a buffer cavity communicated with the cabin cover is provided in the cabin cover, and the buffer cavity is communicated with the ventilation pipe; an air outlet communicated with the cabin cover is provided on the top of the cabin cover, and a sand-proof cover is provided at the air outlet.

[0012] Furthermore, a flared pipe is provided at the front end of the ventilation pipe, and the front end of the flared pipe is a bell-mouth structure.

[0013] Furthermore, a flared pipe is provided at the front end of the ventilation pipe, and the front end of the flared pipe is a bell-mouth structure.

[0014] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0015] 1. Use wind power to drive the wind-driven impeller, thereby driving the first pulley and the mesh filter belt to circulate and clean the sand and dust, ensuring its normal filtering capacity and ventilation effect, and preventing filter blockage;

[0016] 2. Self-cleaning is achieved by external wind power, without manual intervention;

[0017] 3. Using a refrigeration device in conjunction with fins to remove water vapor from the wind can adhere to most of the sand and dust, forming a water-sand mixture that flows out, and also avoids the problem of sand and dust attached to the mesh filter belt containing too much water and difficult to clean. At the same time, the air temperature entering the cabin cover is lower, which is conducive to internal heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion provided in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the bottom cabin in Example 1 of the present invention;

[0021] Figure 3 It is a schematic diagram of the connection structure between the wind-driven impeller and the first pulley in the present invention;

[0022] Figure 4 It is a cross-sectional view of the fins in the present invention arranged in a staggered manner in the ventilation duct;

[0023] Figure 5 is a schematic structural diagram of the first pulley in the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the wind-driven impeller in the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of Example 2 of the present invention.

[0026] Icons: 1-cabin cover, 2-bottom cabin, 3-filter assembly, 31-first pulley, 311-cleaning needle brush, 32-second pulley, 33-mesh filter belt, 331-track, 34-wind-driven impeller, 4-ventilation pipe, 41-drain port, 5-sand discharge pipe, 6-first cleaning brush, 7-second cleaning brush, 8-vibration cam, 9-refrigeration device, 10-fin, 11-temperature conduction ring, 12-buffer chamber, 13-air outlet, 131-sand cover, 14-expansion pipe, 15-ventilation ball. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] Embodiment 1: The following is further described in detail with reference to the embodiment. Figure 1-Figure 6 As shown, the present embodiment is a nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion, comprising a nacelle 1, a bottom nacelle 2 being provided below the nacelle 1, a ventilation pipe 4 communicating with the nacelle 1 being provided in the bottom nacelle 2, a filter assembly 3 being provided in the ventilation pipe 4; the filter assembly 3 comprising a mesh filter belt 33, a first pulley 31 and a second pulley 32, the mesh filter belt 33 being respectively wound around the first pulley 31 and the second pulley 32, and the mesh filter belt 33 being adapted to be shielded by the inner diameter of the ventilation pipe 4; a wind-driven impeller 34 being provided outside the ventilation pipe 4 and being coaxially connected to the first pulley 31, the wind-driven impeller 34 rotating to drive the first pulley 31 and the mesh filter belt 33 to circulate and rotate; the ventilation pipe 4 is externally connected to a sand discharge pipe 5 with its outlet facing downwards, the outlet of the sand discharge pipe 5 being close to the lower end of the mesh filter belt 33; specifically, when entering the nacelle 1 The cooling air passes through the ventilation pipe 4. Due to the shielding of the mesh filter belt 33, the sand and dust carried in the wind will be blocked and covered by it, and the relatively large wind-driven impeller 34 will also be driven by the wind to rotate, providing power for the rotation of the first pulley 31 and the second pulley 32. The mesh filter belt 33 will reciprocate, and when the mesh filter belt 33 moves to the sand discharge pipe 5, because the mesh filter belt 33 itself in the active state has a certain shaking, and when it moves to the junction of the first pulley 31 and the sand discharge pipe 5, the sand and dust attached to its surface will also be scraped off and cleaned, and guided to be discharged from the sand discharge pipe 5 under the action of wind or gravity, ensuring the cleanliness of the mesh filter belt 33 and the ventilation pipe 4 can normally input the corresponding flow of air into the cabin cover 1 for heat dissipation, thereby realizing self-cleaning without the need for external personnel to operate.

[0031] like Figure 2 , Figure 3 and Figure 5As shown, the two side edges of the mesh filter belt 33 in this embodiment are provided with tracks 331 corresponding to the first pulley 31, and the first pulley 31 is evenly distributed with a plurality of cleaning needle brushes 311 in the circumferential direction; the inner wall of the sand discharge pipe 5 is installed with a first cleaning brush 6 and a second cleaning brush 7 in contact with the mesh filter belt 33, and the first cleaning brush 6 and the second cleaning brush 7 are respectively arranged on both sides of the first pulley 31; specifically, sand and dust are easily stuck between the holes of the mesh filter belt 33, and when the mesh filter belt 33 circulates to the first pulley 31, the first belt located on the inner side of the mesh filter belt 33 The cleaning needle brush 311 on the wheel 31 can pass through the holes of the mesh filter belt 33 to clean the stuck sand and dust; and the second cleaning brush 7 serves to separate the two side areas of the mesh filter belt 33. The area on the left side of the mesh filter belt 33 has more sand and dust, while the area on the right side of the mesh filter belt 33 is cleaner. When the mesh filter belt 33 rotates after passing the first pulley 31, the first cleaning brush 6 and the second cleaning brush 7 clean the sand and dust on the surface of the mesh filter belt 33, and it falls and is discharged from the sand discharge pipe 5, while the cleaning needle brush 311 removes the stubborn sand stuck between the holes.

[0032] Reference Figure 2 As shown, in order to improve the cleaning effect, the present embodiment further includes a vibrating cam 8, the power of which can be supplied by a fan, and the vibrating cam 8 is arranged on the inner side of the mesh filter belt 33, and the mesh filter belt 33 is periodically hit by the rotation of the vibrating cam 8; specifically, while the first pulley 31 and the second pulley 32 drive the mesh filter belt 33 to rotate, the vibration generated by the rolling of the vibrating cam 8 and the mesh filter belt 33 is conducive to shaking off the sand and dust attached to the mesh filter belt 33.

[0033] like Figure 2 As shown, the mesh filter belt 33 is inclined toward one side of the sand discharge pipe 5; specifically, under the action of wind and the vibration cam 8, the sand and dust entering the ventilation pipe 4 are easily discharged from the sand discharge pipe 5 along the inclined surface, reducing the amount of sand and dust attached to the mesh filter belt 33.

[0034] like Figure 2As shown, a refrigeration device 9 is installed in the bottom cabin 2, and an evaporator is used for heat exchange. The refrigeration device 9 adopts the existing technology, so it is not repeated. The refrigeration device 9 is powered by a fan. A temperature conducting ring 11 is provided in the ventilation pipe 4 and is attached to the inner wall thereof. The temperature conducting ring 11 is connected to the refrigeration device 9, and a plurality of fins 10 are arranged alternately on the temperature conducting ring 11; a drain port 41 is provided at the bottom of the ventilation pipe 4, and the position of the drain port 41 corresponds to the lower end of the fin 10; specifically, the temperature conducting ring 11 The low temperature generated reduces the temperature of the fins 10. The multiple rows of staggered fins 10 allow the wind to pass through the fins 10. If there is a lot of water vapor, it will be cooled and liquefied and adhere to the fins 10. Some of the sand and dust may also adhere to the blades. When it accumulates too much, it slides down along the fins 10 and flows out from the drain port 41, effectively reducing the amount of sand and dust and water vapor that the mesh filter belt 33 contacts. The mesh filter belt 33 is also not easy to be attached to the sand and dust due to excessive water content in the wind, which increases the difficulty of cleaning.

[0035] In addition, the temperature of the air entering the cabin cover 1 is lower, which is more conducive to cooling the equipment in the cabin cover 1 and has a better heat dissipation effect.

[0036] In order to increase the contact area of ​​the fin 10 , the fin 10 is arranged in an inclined shape, and the fin 10 is inclined toward the drain port 41 , which is also conducive to the wind blowing the liquefied water out.

[0037] like Figure 1 As shown, a buffer cavity 12 is provided in the cabin cover 1, and the buffer cavity 12 is connected with the ventilation pipe 4. An air outlet 13 connected with the cabin cover 1 is provided on the top of the cabin cover 1, and the air outlet 13 is provided with a sand-proof cover 131; specifically, relatively clean air enters the buffer cavity 12 of the cabin cover 1, and cools down the equipment in the cabin, and the air with higher temperature rises and is discharged from the air outlet 13, and the sand-proof cover 131 of the air outlet 13 prevents sand and dust from entering from the tail end.

[0038] In order to increase the air intake of the ventilation pipe 4 , a conveying fan 17 is installed in the bottom cabin 2 , and the conveying fan 17 is connected to the ventilation pipe 4 .

[0039] Reference Figure 2 As shown, a coarse screen shield 18 is installed at the pipe mouth of the ventilation pipe 4, and the coarse screen shield 18 is a conical structure; specifically, the coarse screen shield 18 can ventilate normally, and its mesh is relatively large, and the sand and dust collide and disperse along the conical structure, which can block a part of the sand and dust from entering the ventilation pipe 4, reducing the processing difficulty of the mesh filter belt 33.

[0040] Embodiment 2: Based on embodiment 1, Figure 7As shown, this embodiment is different from the other embodiment in that an expanded tube 14 is additionally provided at the front end of the ventilation pipe 4, and the front end of the expanded tube 14 is designed to be a trumpet-mouth structure, so that when the wind enters the ventilation pipe 4, the diameter of the wind passing through the pipe becomes smaller, so that the wind flow rate is faster, which helps the wind to pass through the mesh filter belt 33 better; and at the same time, because the wind will enter the sand discharge pipe 5 through the ventilation pipe 4, the air flow rate in the sand discharge pipe 5 is lower than the external flow rate, and its pressure is lower than the external pressure, and a ventilation ball 15 is rotatably connected to the lower end of the sand discharge pipe 5. The ventilation ball 15 can achieve unpowered rotation under the action of external wind, and negative pressure is generated around it itself. Due to the action of the refrigeration device 9, the air temperature is relatively low and will sink. Under the combined action of the above-mentioned various factors, the ventilation ball 15 produces a good vacuum cleaner effect, which helps to exhaust the cleaned sand and dust.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind turbine nacelle structure for preventing wind and sand intrusion, comprising a nacelle cover (1), characterized in that: A bottom cabin (2) is provided below the cabin cover (1), the bottom cabin (2) is provided with a ventilation pipe (4) communicating with the cabin cover (1), and a filter assembly (3) is provided in the ventilation pipe (4); The filter assembly (3) comprises a mesh filter belt (33), a first pulley (31) and a second pulley (32), the mesh filter belt (33) is respectively wound around the first pulley (31) and the second pulley (32), and the mesh filter belt (33) is adapted to block the inner diameter of the ventilation pipe (4); A wind-driven impeller (34) is arranged outside the ventilation pipe (4) and is coaxially connected to the first belt pulley (31), and the wind-driven impeller (34) rotates to drive the first belt pulley (31) and the mesh filter belt (33) to rotate cyclically; The ventilation pipe (4) is externally connected to a sand discharge pipe (5) with its pipe opening facing downwards, and the pipe opening of the sand discharge pipe (5) is close to the lower end of the mesh filter belt (33).

2. The nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion according to claim 1 is characterized in that: Tracks (331) corresponding to and matching the first belt pulley (31) are provided on both side edges of the mesh filter belt (33), and a plurality of groups of cleaning needle brushes (311) are evenly distributed around the first belt pulley (31); A first cleaning brush (6) and a second cleaning brush (7) in contact with the mesh filter belt (33) are installed on the inner wall of the sand discharge pipe (5), and the first cleaning brush (6) and the second cleaning brush (7) are respectively arranged on both sides of the first pulley (31).

3. The nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion according to claim 2 is characterized in that: It also comprises a vibrating cam (8), wherein the vibrating cam (8) is arranged on the inner side of the mesh filter belt (33), and the mesh filter belt (33) is periodically struck by the rotation of the vibrating cam (8).

4. The nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion according to claim 3 is characterized in that: The mesh filter belt (33) is arranged obliquely toward one side of the sand discharge pipe (5).

5. The nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion according to claim 1, characterized in that: A refrigeration device (9) is installed in the bottom cabin (2), a temperature conducting ring (11) is provided in the ventilation pipe (4) and is in contact with the inner wall thereof, the temperature conducting ring (11) is connected to the refrigeration device (9), and a plurality of fins (10) are arranged in an alternating manner on the temperature conducting ring (11); A drainage port (41) is provided at the bottom of the ventilation pipe (4), and the position of the drainage port (41) corresponds to the lower end of the fin (10).

6. The nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion according to claim 5 is characterized in that: The fin (10) is arranged in an inclined shape, and the fin (10) is inclined toward one side of the drainage port (41).

7. The nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion according to claim 1, characterized in that: The cabin cover (1) is provided with a buffer chamber (12) in communication therewith, and the buffer chamber (12) is in communication with the ventilation pipe (4); An air outlet (13) communicating with the cabin cover (1) is provided at the top of the cabin cover (1), and the air outlet (13) is provided with a sand-proof cover (131).

8. The nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion according to any one of claims 1 to 7, characterized in that: A flared tube (14) is provided at the front end of the ventilation tube (4), and the front end of the flared tube (14) is a bell-mouth structure.

9. The nacelle structure of a wind turbine generator that is resistant to wind and sand intrusion according to claim 8 is characterized in that: A flared tube (14) is provided at the front end of the ventilation tube (4), and the front end of the flared tube (14) is a bell-mouth structure.

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