Wind generating set

Abstract

The utility model provides a wind generating set which comprises an engine room and a hub arranged at the first end of the engine room, an exhaust fan is arranged in the engine room, the wind generating set further comprises an air inlet cabin, the air inlet cabin is arranged on the engine room and communicated with the engine room, the air inlet cabin comprises an air inlet unit, and the hub is arranged at the first end of the engine room. The air inlet unit extends in the horizontal direction, a plurality of air inlet holes and a plurality of filtering units are arranged at the bottom of the air inlet unit, and the filtering units are located in the air inlet holes; the air supply unit is arranged in the air inlet cabin, air flowing in from the air inlet holes enters the cabin through the air supply unit, and the static pressure of the air supply unit is larger than or equal to that of the exhaust fan. The air inlet cabin is arranged to solve the problem that multiple air inlets cannot be formed due to the fact that the cabin structure is limited, sand and dust are filtered through the filtering unit, air fed into the cabin does not carry the sand and dust, and the influence on the service life of the unit is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a wind power generator set. Background Art

[0002] As the main market of onshore wind turbines in my country shifts to the Shagohuang Base, the cost of wind power generation has further decreased. Under this trend, water cooling systems are less used due to their high cost and complexity. At present, mainstream domestic manufacturers have adopted the design concept of full air cooling in the cabin, that is, the gearbox, generator and other components in the cabin are all cooled by air. For a 10MW wind turbine, the total cooling air volume required for the gearbox, generator, control cabinet and other components is generally 100,000 m 3 This means that sufficient air intake is required to meet the heat dissipation requirements of the full air-cooling design of the cabin components, and the air used for cooling needs to be filtered to prevent the large amount of sand and dust in the desert environment from harming the operation of the cabin equipment.

[0003] The selection of the air inlet position for the conventional all-air-cooled cabin layout solution, taking into account the need for rain protection, is generally chosen to be arranged on the bottom surface of the cabin cover. First, the number of air inlet filter units that need to be arranged on the bottom surface of the cabin cover is calculated by dividing the total area of ​​the air inlet openings corresponding to the required air intake volume of the cabin and the area of ​​the selected air inlet filter unit. Then the required number of air inlet filter units are arranged on the bottom surface of the cabin cover. Finally, the layout position is iteratively optimized based on the maintainability and structural strength calculation results.

[0004] This method is more suitable for early small-capacity units, because the cabin heat dissipation demand of small-capacity units is limited, and thus the cabin cooling air volume demand is limited, so there will not be too many air inlet holes on the bottom of the cabin cover. However, for the current 10MW-level large-capacity units, the cabin heat dissipation power is generally at the level of 400-500kW, and it is necessary to open 12-15m air inlet holes on the bottom of the cabin. 2 The air inlet hole. Such a large opening area requirement will lead to a reduction in the overall strength and rigidity of the cabin cover; the maintenance and replacement space for the ventilation holes will also be limited due to the obstruction of the equipment and platform plates above the openings; at the same time, the increased duct pressure resistance of the rack platform plate will further damage the heat dissipation effect of the cabin. In addition, the existing units only have exhaust fans, which exhaust the air in the cabin to form a negative pressure in the cabin during heat dissipation, and use the pressure difference between the inside and outside of the cabin to draw the air outside the cabin into the cabin. In the case of sand and dust in the air in the desert environment, the air with sand and dust is sucked into the cabin, especially from the gaps in the cabin, which makes it impossible to filter it. Long-term operation will have an impact on the equipment in the cabin, thereby reducing the service life of the equipment. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a wind turbine generator set in order to overcome the defects in the prior art that the openings on the cabin cannot meet the heat dissipation requirements and that sand and dust are easily sucked into the cabin, affecting the life of the equipment.

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] A wind turbine generator set, comprising a nacelle and a hub arranged at a first end of the nacelle, an exhaust fan being arranged in the nacelle, and the wind turbine generator set further comprising:

[0008] An air inlet cabin, the air inlet cabin is arranged on the nacelle and communicated with the nacelle, the air inlet cabin comprises an air inlet unit, the air inlet unit extends in a horizontal direction, a plurality of air inlet holes and a plurality of filter units are arranged at the bottom of the air inlet unit, and the filter units are located in the air inlet holes;

[0009] An air supply unit is arranged in the air inlet cabin, and the air flowing in from the air inlet hole enters the cabin through the air supply unit, and the static pressure of the air supply unit is greater than or equal to the static pressure of the exhaust fan.

[0010] In this solution, an additional air inlet cabin is provided and an air inlet unit is provided on the air inlet cabin for introducing air with a lower external temperature, so as to solve the problem that multiple air inlets cannot be provided due to the limited structure of the cabin and the strength requirements of the cabin, so that the amount of air entering the cabin can meet the cooling requirements of the units with higher power, and avoid overheating of the units and affecting their service life. The air inlet hole is located at the bottom of the air inlet unit, which can prevent dust from accumulating and blocking the air inlet hole or entering the cabin in a dusty environment. In addition, the dust is filtered by the filter unit, so that the air entering the air inlet cabin and sent into the cabin through the air supply unit does not contain dust. By providing an additional air supply unit, compared with the method of providing an exhaust fan in the cabin to form a negative pressure in the cabin and inhale the air with a lower external temperature, the additional air supply unit can change the internal pressure of the cabin from negative pressure to positive pressure, so as to avoid the situation that when the cabin inhales air under negative pressure, the air with dust is inhaled from the gap of the cabin and affects the service life of the unit.

[0011] Preferably, the air inlet cabin is located at the second end of the nacelle, and the air inlet cabin includes a plurality of the air inlet units, which are located on a side wall of the second end of the air inlet cabin away from the nacelle and are spaced apart in the vertical direction.

[0012] In the present solution, the air inlet cabin is located at the second end of the cabin, which can make the air inlet cabin away from the blades on the hub to avoid affecting the rotation of the blades when the air is introduced. Multiple air inlet units can further meet the cooling needs of higher-power units, and multiple air inlet units arranged at intervals in the vertical direction can make full use of the space at the bottom of the air inlet unit for air intake within a limited space. Compared with air inlet units arranged in other directions, the air volume can be fully guaranteed.

[0013] Preferably, a support portion is provided between two adjacent air inlet units, and the support portion is located on both sides of the air inlet unit.

[0014] In the present solution, a support portion is provided to support two upper and lower adjacent air inlet units, thereby maintaining a distance between the two air inlet units and improving the stability and reliability of the air inlet units. In addition, the support portion can also block rainwater from the sides of the air inlet units to prevent rainwater from entering the air inlet compartment or the cabin.

[0015] Preferably, the support portion extends in a horizontal direction, and a dimension of the support portion on a side away from the second end of the nacelle gradually decreases from top to bottom in a vertical direction.

[0016] In this solution, the above arrangement is used to increase the air intake volume at the side of the air intake unit while shielding rainwater.

[0017] Preferably, a threaded hole is provided on the circumference of the air inlet hole, and the filter unit is connected to the air inlet hole by bolts;

[0018] Alternatively, a sliding assembly is provided on the peripheral side of the air inlet hole, and the filter unit slides into the air inlet hole through the sliding assembly.

[0019] In this solution, the filter unit is connected to the air inlet hole by screws or sliding components, so as to facilitate the maintenance of the filter unit at a later stage and reduce the difficulty of maintenance.

[0020] Preferably, a bracket is provided in the air inlet cabin, the air supply unit is installed on the bracket, and a maintenance platform is also provided on the bracket, and the maintenance platform is located between the air supply unit and the air inlet unit.

[0021] In this solution, a bracket is provided to support the air supply unit, and a maintenance platform is provided on the bracket, so that maintenance personnel can effectively maintain the air supply unit and other structures in the air inlet cabin, thereby improving ease of use.

[0022] Preferably, a separation wall is provided between the air inlet cabin and the nacelle, a mounting hole is provided on the separation wall, and the air supply unit is arranged in the mounting hole.

[0023] In this solution, an isolation wall is set up to block other impurities or structures from entering the cabin or affecting the unit structure in the cabin. The dust-free air in the air inlet cabin only enters the cabin through the installation hole of the air supply unit.

[0024] Preferably, the isolation wall is further provided with an inspection door, and the inspection door is arranged corresponding to the maintenance platform.

[0025] In this solution, an inspection door is provided so that maintenance personnel can smoothly enter the cabin when performing maintenance on the internal structure of the cabin. In addition, the inspection door is also provided corresponding to the maintenance platform. After maintaining the cabin, maintenance personnel can also perform maintenance on the air inlet cabin, thereby reducing the difficulty and steps of maintenance.

[0026] Preferably, a rack for mounting the unit is provided in the cabin, the rack extends toward the air inlet cabin and is connected to the bracket, and the isolation wall is located between the rack and the bracket.

[0027] In this solution, the frame is extended and connected to the bracket, so that the structural stability of the bracket is further improved, thereby avoiding a series of safety problems caused by the bracket shaking in the air inlet cabin when the bracket is set separately.

[0028] Preferably, a plurality of the air supply units are provided and the plurality of the air supply units are evenly distributed on both sides of the inspection door.

[0029] In this solution, multiple air supply units are set up to ensure the heat dissipation effect, and the multiple air supply units are evenly distributed on both sides of the inspection door so that the air flow into the cabin is more uniform, avoiding local air flow from causing vortexes in the cabin and reducing the heat dissipation efficiency.

[0030] The positive and progressive effect of the utility model is that the utility model solves the problem that the cabin structure is limited and the cabin strength requirements cannot be set up with multiple air inlets by setting up an additional air inlet cabin and setting up an air inlet unit on the air inlet cabin for introducing air with a lower external temperature, so that the amount of air entering the cabin can meet the cooling requirements of the unit with a larger power, avoiding overheating of the unit and affecting its service life. The air inlet hole is located at the bottom of the air inlet unit, which can prevent dust from accumulating and blocking the air inlet hole or entering the cabin in a dusty environment. In addition, the dust is filtered by the filter unit, so that the air entering the air inlet cabin and sent into the cabin through the air supply unit is free of dust. By setting up an additional air supply unit, compared with the method of setting up an exhaust fan alone in the cabin to form a negative pressure in the cabin and inhaling air with a lower external temperature, the additional air supply unit can change the internal pressure of the cabin from negative pressure to positive pressure, thereby avoiding the situation that when the cabin inhales air under negative pressure, the air with dust is inhaled from the cabin gap and affects the service life of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure is a schematic structural diagram of a wind turbine generator set according to a preferred embodiment of the utility model.

[0032] Figure 2 It is a three-dimensional diagram of an air intake cabin according to a preferred embodiment of the utility model.

[0033] Figure 3 This is a diagram showing the position relationship between the air inlet hole and the air inlet unit of a preferred embodiment of the utility model.

[0034] Figure 4 This is a diagram showing the positional relationship between a bracket and an air supply unit according to a preferred embodiment of the utility model.

[0035] Figure 5 This is a diagram showing the position relationship between the inspection door and the air supply unit of a preferred embodiment of the utility model.

[0036] Figure 6 This is a diagram showing the positional relationship between the maintenance platform and the bracket of a preferred embodiment of the utility model.

[0037] Description of reference numerals:

[0038] Cabin 1

[0039] Wheel 2

[0040] Air intake compartment 3

[0041] Air intake unit 31

[0042] Air inlet 311

[0043] Air supply unit 32

[0044] Supporting part 4

[0045] Bracket 5

[0046] Maintenance Platform 6

[0047] Wall 7

[0048] Inspection door 71 DETAILED DESCRIPTION

[0049] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0050] This embodiment provides a wind turbine generator set, the specific structure of which is as follows Figure 1 , Figure 2 and Figure 3As shown, the wind turbine generator set includes a nacelle 1 and a hub 2 arranged at a first end of the nacelle 1, the hub 2 is provided with blades, an exhaust fan (not shown) and a generator set are arranged in the nacelle 1, the blades are driven by wind to drive the generator set to rotate, and an exhaust fan is arranged in the nacelle 1 to start when the generator set is running or the generator set is shut down at high temperature to discharge the air with higher temperature in the nacelle 1, and form a negative pressure state in the nacelle 1. In the negative pressure state, the nacelle 1 sucks the external air with lower temperature into the nacelle 1 when there is a pressure difference with the external air pressure, thereby realizing air cooling and heat dissipation of the generator set. The wind turbine generator set also includes:

[0051] The air inlet cabin 3 is arranged on the nacelle 1 and is in communication with the nacelle 1. The air inlet cabin 3 includes an air inlet unit 31. The air inlet unit 31 extends in a horizontal direction. A plurality of air inlet holes 311 and a plurality of filter units (not shown in the figure) are arranged at the bottom of the air inlet unit 31. The filter units are located in the air inlet holes 311.

[0052] The air supply unit 32 is arranged in the air inlet cabin 3. The air flowing in through the air inlet hole 311 enters the cabin 1 through the air supply unit 32. The static pressure of the air supply unit 32 is greater than or equal to the static pressure of the exhaust fan.

[0053] Specifically, the air inlet cabin 3 is connected to the cabin 1 and is provided with an air inlet unit 31. The air inlet holes 311 and the filter unit provided on the air inlet unit 31 can allow the air with a lower outside temperature to enter the air inlet cabin 3 and finally enter the cabin 1. The filter unit can filter the air in the cabin 1 under negative pressure in a dusty environment to prevent dust from polluting the generator set and shortening the service life of the generator set. The horizontally arranged air inlet unit 31 can be provided with air inlet holes 311 at its bottom to reduce the situation where dust is deposited on the top of the air inlet unit 31 in a dusty environment and blocks the air inlet holes 311. For a 10MW wind turbine, its heat dissipation requirement is 100,000 m 3 / h order of magnitude, in this embodiment, the air inlet originally set at the bottom of the cabin 1 is set on the air inlet unit 31, and the air inlet unit 31 can be provided with multiple air inlet holes 311 to meet the heat dissipation requirements of the high-power generator set without being limited by the structural strength of the cabin 1 and the space at the bottom of the cabin 1, so as to avoid overheating of the unit and affect its service life. The number of air inlet holes 311 and the total air intake area of ​​the multiple air inlet holes 311 can be preset according to the actual heat dissipation requirements, which is a prior art and will not be elaborated on here.

[0054] In addition, in this embodiment, an air supply unit 32 is also provided. The air supply unit 32 is used to introduce the filtered air in the air inlet compartment 3 into the cabin 1, and cooperate with the exhaust fan originally provided in the cabin 1. When the static pressure of the air supply unit 32 is greater than the static pressure of the exhaust fan, the air with a lower outside temperature enters the cabin 1 through the air inlet unit 31 and the air inlet compartment 3, and is accelerated into the cabin 1 by the air supply unit 32, so that the negative pressure in the cabin 1 can be changed to positive pressure, that is, the air pressure in the cabin 1 is greater than the outside air pressure, so that the heat dissipation of the cabin 1 no longer depends on the inhalation of outside air but on the inhalation of the air by the air supply unit 32. The clean air filtered by the filter unit under the positive pressure state is introduced into the cabin 1, which can avoid the situation that the air with sand and dust is inhaled into the cabin 1 from the gap at the connection of the inner wall of the cabin 1 when the cabin 1 inhales air, thereby polluting the generator set and reducing the service life of the generator set. Accordingly, the service life of the generator set is improved. Similarly, when the static pressure of the air supply unit 32 is equal to the static pressure of the exhaust fan, although the air pressure inside and outside the cabin 1 is consistent, a heat dissipation method can be achieved without sucking air into the cabin 1, thereby avoiding the situation where the cabin 1 sucks in air containing dust from the gaps in the cabin 1 when it inhales air under a negative pressure state and affects the service life of the unit.

[0055] In other embodiments, after the air inlet cabin 3 and the cabin 1 are installed, the inner walls and holes of the cabins also need to be filled with sealing materials in the prior art, such as sealants, to prevent air containing sand and dust from entering the cabin 1 or the air inlet cabin 3.

[0056] In this embodiment, the air inlet compartment 3 is located at the second end of the nacelle 1, and the air inlet compartment 3 includes a plurality of air inlet units 31. The plurality of air inlet units 31 are located on the second end side wall of the air inlet compartment 3 away from the nacelle 1 and are spaced apart in the vertical direction.

[0057] Specifically, the air inlet cabin 3 is arranged away from the hub 2 and is located at the second end of the nacelle 1 and in the same straight line direction. On the one hand, it can meet the heat dissipation requirements of air intake. On the other hand, when the air inlet cabin 3 is away from the hub 2, it can avoid contact with the blades to prevent structural interference. When the air inlet cabin 3 takes in air, it can be free from eddy current interference from the blades, thereby ensuring the air intake volume. The air inlet cabin 3 and the nacelle 1 are both made of glass fiber in the prior art.

[0058] From the appearance, multiple air inlet units 31 are arranged at intervals in the vertical direction, so that the side wall of the air inlet cabin 3 where the air inlet unit 31 is arranged has a "tooth comb" structure. By superimposing multiple layers of gaps in the vertical direction, the total area of ​​the air inlet holes 311 is increased within a limited volume. The air inlet cabin 3 is a rectangular parallelepiped structure and the air inlet unit 31 is a rectangular parallelepiped structure. Multiple air inlet units 31 can further meet the cooling needs of the power generator set with higher power. Air can enter the air inlet holes 311 at the bottom of the air inlet unit 31 from the gaps in the "tooth comb" structure to solve the problem that the air circulation pressure resistance is high and the heat dissipation effect is affected when air is simply inhaled from the bottom of the cabin 1. The heat dissipation needs of high-power generator sets can be met within a certain space. Compared with the air inlet units 31 arranged in other directions, for example, the method of arranging multiple air inlet units 31 at intervals in the horizontal direction, the space utilization rate is higher and the air intake volume can be fully guaranteed.

[0059] In other embodiments, the air inlet compartment 3 may also be arranged on the side or top of the cabin 1, which can also achieve effective heat dissipation. Users can customize it according to actual needs, which will not be elaborated here.

[0060] like Figure 2 As shown, in this embodiment, a support portion 4 is disposed between two adjacent air inlet units 31 , and the support portion 4 is located on both sides of the air inlet unit 31 .

[0061] Specifically, the support part 4 is a flat plate, and the support part 4 is used to connect the side of the gap between the two adjacent air inlet units 31, so that air can only enter through the end direction of the air inlet unit 31, so as to block rainwater from the side of the gap through the support part 4, and prevent rainwater from entering the air inlet cabin 3 or the cabin 1. In addition, the support part 4 is arranged at the gap to support the two adjacent air inlet units 31, and prevent the air inlet units 31 from tilting due to gravity or other external factors, so as to avoid affecting the heat dissipation effect, that is, to maintain the distance between the two air inlet units 31, and improve the stability and reliability of the air inlet units 31.

[0062] In this embodiment, the support portion 4 extends in the horizontal direction, and the size of the support portion 4 on the side away from the second end of the nacelle 1 gradually decreases from top to bottom in the vertical direction.

[0063] Specifically, the support portion 4 is a trapezoidal structure, with one right-angled side of the trapezoidal structure arranged toward the side of the air inlet cabin 3, and the larger end is connected to the upper air inlet unit 31, and the smaller end is connected to the lower air inlet unit 31. This makes the notch of the trapezoidal structure close to the lower air inlet unit 31. In a windy and rainy environment, when rainwater is driven by the wind to flow from the side of the air inlet unit 31, the notch close to the lower air inlet unit 31 can ensure that the air inlet hole 311 at the bottom of the upper air inlet unit 31 is not affected by rainwater, and the material used in the support portion 4 is reduced, reducing the structural cost, and some air can also enter the notch to increase the air intake on the side of the air inlet unit 31 while blocking rainwater.

[0064] In this embodiment, threaded holes are provided around the air inlet hole 311, and the filter unit is connected to the air inlet hole 311 by bolts;

[0065] Alternatively, a sliding assembly is provided around the air inlet hole 311 , and the filter unit slides into the air inlet hole 311 through the sliding assembly.

[0066] Specifically, in this embodiment, three air inlet units 31 are provided, a plurality of air inlet holes 311 are provided at the bottom of the air inlet unit 31, threaded holes are provided at the sides of the air inlet holes 311, a through hole is provided on the filter unit, and the filter unit is screwed to the bottom of the air inlet unit 31 by bolts and is located in the air inlet hole 311. The filter unit is a filter screen or filter cotton used to filter sand and dust in the air in the prior art, and will not be described in detail here.

[0067] In another embodiment, a slide rail is provided at the bottom of the air inlet unit 31, and the slide rail may be an "L"-shaped rail in the prior art. The "L"-shaped rail is relatively arranged on both sides of the bottom of the air inlet unit 31, and the filter unit is integrated on a plate. By extending the plate into the slide rail, the filter unit can be installed or disassembled by sliding, thereby improving maintenance efficiency.

[0068] In other embodiments, the bottom of one of the three air inlet units 31 is flush with the bottom of the air inlet compartment 3, and the other two air inlet units 31 are located above it. An "L"-shaped track is set at the bottom of the upper air inlet unit 31, and the installation of the filter unit is achieved by integrating multiple filter screens or filter cottons on the plate and extending them into the "L"-shaped track. The filter unit of the lower air inlet unit 31 is installed in the air inlet hole 311 by bolts, so as to adapt to the installation of the filter unit when the installation space is insufficient and reduce the operating difficulty of the operator.

[0069] like Figure 4 and Figure 6As shown, in this embodiment, a bracket 5 is provided in the air inlet cabin 3, the air supply unit 32 is installed on the bracket 5, and a maintenance platform 6 is also provided on the bracket 5, and the maintenance platform 6 is located between the air supply unit 32 and the air inlet unit 31.

[0070] Specifically, the bracket 5 is a frame structure having a base and a frame extending in the vertical direction, and a crossbeam for mounting the air supply unit 32 is provided on the frame to support the air supply unit 32. A groove for accommodating a maintenance platform 6 is provided on the base, and the maintenance platform 6 is a flat plate for operators to stand and maintain the air inlet cabin 3. By providing the bracket 5 to support the air supply unit 32, the stability and reliability of the air supply unit 32 during operation are ensured, and the maintenance platform 6 is provided on the bracket 5, so that maintenance personnel can effectively maintain the air supply unit 32 and other structures in the air inlet cabin 3, thereby improving the convenience of use.

[0071] In this embodiment, a partition wall 7 is provided between the air inlet compartment 3 and the nacelle 1 , a mounting hole is provided on the partition wall 7 , and the air supply unit 32 is disposed in the mounting hole.

[0072] Specifically, the isolation wall is the side wall of the air inlet cabin 3 close to the cabin 1, and the air inlet cabin 3 is separated from the cabin 1 by the isolation wall 7 to prevent other impurities or dirt in the air inlet cabin 3 except the filtered air from entering the cabin 1, thereby preventing impurities or dirt from entering the cabin 1 and affecting the normal operation of the generator set in the cabin 1, so that the dust-free air in the air inlet cabin 3 enters the cabin 1 only through the installation hole of the air supply unit 32, thereby ensuring the heat dissipation requirements while avoiding the situation where the generator set is lower than the normal operating temperature due to excessive air volume.

[0073] In this embodiment, an inspection door 71 is further provided on the isolation wall 7 , and the inspection door 71 is provided corresponding to the maintenance platform 6 .

[0074] Specifically, an inspection door 71 is provided in the middle area of ​​the isolation wall 7, and the air inlet cabin 3 and the cabin 1 are also connected through the inspection door 71. When the inspection door 71 is sealed, it can ensure that impurities or dirt cannot enter the cabin 1 through the inspection door 71. When the inspection door 71 is opened, the operator can enter the cabin 1 from the air inlet cabin 3 to maintain the generator set and other structures. By setting the inspection door 71, the maintenance personnel can smoothly enter the cabin 1 when they maintain the internal structure of the cabin 1, and when entering the cabin 1 from the air inlet cabin 3, the air in the air inlet cabin 3 has been filtered by the filter unit, so that the air with sand and dust will not enter the cabin 1 during maintenance, which ensures the effectiveness of maintenance and improves the service life of the generator set. By setting the inspection door 71 corresponding to the maintenance platform 6, the maintenance personnel can also maintain the air inlet cabin 3 after maintaining the cabin 1, thereby reducing the difficulty and steps of maintenance.

[0075] In this embodiment, a rack (not shown in the figure) for mounting the unit is provided in the cabin 1 , the rack extends toward the air inlet cabin 3 and is connected to the bracket 5 , and the isolation wall 7 is located between the rack and the bracket 5 .

[0076] Specifically, the frame is located at the bottom of the cabin 1 and is used to install the generator set. While supporting the generator set, the frame also extends toward the air inlet cabin 3 and is connected to the base of the bracket 5 in the air inlet cabin 3, that is, the frame and the bracket 5 are an integrated structure and are located in different cabins. By extending the frame and connecting it with the bracket 5, the structural stability of the bracket 5 is further improved, thereby avoiding a series of safety problems caused by the bracket 5 shaking in the air inlet cabin when the bracket 5 is set alone.

[0077] like Figure 5 As shown, in this embodiment, a plurality of air supply units 32 are provided and the plurality of air supply units 32 are evenly distributed on both sides of the inspection door 71 .

[0078] Specifically, the air supply unit 32 is a fan in the prior art, and multiple fans are provided and are symmetrically arranged with the inspection door 71 as the axis. This embodiment is described with four fans, but it is not limited thereto. Two fans are provided on both sides of the inspection door 71 and arranged up and down. The fans are connected to the crossbeams on the bracket 5 to achieve support for the fans. The mounting holes on the isolation wall 7 are circular holes so that the fans can be installed in the mounting holes. The multiple air supply units 32 are evenly distributed on both sides of the inspection door 71 so that the air flow into the cabin 1 is more uniform, and local air flow is prevented from causing vortices in the cabin 1 and reducing the heat dissipation efficiency.

[0079] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A wind turbine generator set, comprising a nacelle and a hub disposed at a first end of the nacelle, wherein an exhaust fan is disposed in the nacelle, It is characterized in that The wind turbine generator set also includes: An air inlet cabin, the air inlet cabin is arranged on the nacelle and communicated with the nacelle, the air inlet cabin comprises an air inlet unit, the air inlet unit extends in a horizontal direction, a plurality of air inlet holes and a plurality of filter units are arranged at the bottom of the air inlet unit, and the filter units are located in the air inlet holes; An air supply unit is arranged in the air inlet cabin, and the air flowing in from the air inlet hole enters the cabin through the air supply unit, and the static pressure of the air supply unit is greater than or equal to the static pressure of the exhaust fan.

2. The wind turbine generator set according to claim 1, It is characterized in that The air inlet cabin is located at the second end of the nacelle, and the air inlet cabin includes a plurality of air inlet units. The plurality of air inlet units are located on a side wall of the second end of the air inlet cabin away from the nacelle and are spaced apart in the vertical direction.

3. The wind turbine generator set according to claim 2, It is characterized in that A support portion is provided between two adjacent air inlet units, and the support portion is located on both sides of the air inlet unit.

4. The wind turbine generator set according to claim 3, It is characterized in that The support portion extends in a horizontal direction, and a dimension of the support portion on a side away from the second end of the nacelle gradually decreases from top to bottom in a vertical direction.

5. The wind turbine generator set according to claim 1, It is characterized in that A threaded hole is provided on the circumference of the air inlet hole, and the filter unit is connected to the air inlet hole by bolts; Alternatively, a sliding assembly is provided on the peripheral side of the air inlet hole, and the filter unit slides into the air inlet hole through the sliding assembly.

6. The wind turbine generator set according to claim 1, It is characterized in that A bracket is arranged in the air inlet cabin, the air supply unit is installed on the bracket, and a maintenance platform is also arranged on the bracket, and the maintenance platform is located between the air supply unit and the air inlet unit.

7. The wind turbine generator set according to claim 6, It is characterized in that A separation wall is arranged between the air inlet cabin and the nacelle, a mounting hole is opened on the separation wall, and the air supply unit is arranged in the mounting hole.

8. The wind turbine generator set according to claim 7, It is characterized in that The isolation wall is also provided with an inspection door, and the inspection door is arranged corresponding to the maintenance platform.

9. The wind turbine generator set according to claim 7, It is characterized in that A rack for installing the unit is arranged in the cabin, the rack extends toward the air inlet cabin and is connected to the bracket, and the isolation wall is located between the rack and the bracket.

10. The wind turbine generator set according to claim 8, It is characterized in that The air supply units are provided in plurality and the plurality of air supply units are evenly distributed on both sides of the inspection door.

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