CN217873127U - Heat dissipation structure of wind power generating set and wind power generating set - Google Patents

Abstract

The utility model discloses a heat dissipation structure of a wind generating set, which comprises an impeller one-way valve, a salt spray filtering device, a flow guide cover, a cabin and a moving shaft, wherein the windward side of the flow guide cover is provided with an air inlet, the impeller one-way valve is arranged at the inner side of the air inlet, the salt spray filtering device is arranged at the leeward end surface of the impeller one-way valve, the tail part of the cabin is provided with an air outlet, and the inner side of the air outlet is provided with the cabin one-way valve; the radiating fins are arranged along the inner side of the moving shaft in a circle; by the design of a unit heat dissipation structure, cold air flowing from the outside is utilized to automatically dissipate heat inside the unit; the micro-positive pressure is automatically formed in the unit, and the air flow can take away heat in the cabin and simultaneously can block external unclean matters from entering; the heat dissipation and cooling of the transmission system are accelerated by adding the heat dissipation fins; in addition, the sealing door is additionally arranged, so that cold air can only pass through gaps between the radiating fins and the transmission system, and the heat dissipation and cooling of the transmission system are efficiently accelerated.

Description

Heat dissipation structure of a wind power generating set and the wind power generating set

technical field

The utility model belongs to the technical field of wind power generation, and in particular relates to a heat dissipation structure of a wind power generator set and the wind power generator set.

Background technique

Wind turbines will generate a lot of heat during operation and power generation. The heat comes from the heat dissipation of the control cabinet inside the hub, the heat dissipation of the transmission system, the heat dissipation of the generator, the heat dissipation of the electric control cabinet inside the nacelle, and the heat dissipation of the power cables inside the unit, etc. aspect;

The heat generated by the generator is discharged to the outside, but the heat dissipation of the control cabinet inside the wheel hub, the heat dissipation of the transmission system, the heat dissipation of the electric control cabinet inside the engine room, and the heat dissipation of the power cable inside the unit are directly discharged to the inside of the unit;

In turn, the ambient temperature inside the entire unit will rise, which will easily lead to over-temperature failure of the unit, shorten the life of the components of the electric control cabinet, and even shut down the unit, causing the loss of the wind turbine generator;

And the heat dissipation of the transmission system, the heat dissipation of the electric control cabinet inside the engine room, and the heat dissipation of the power cables inside the unit are the largest;

Units on the market generally add a heat dissipation system inside the engine room to dissipate heat for the drive train, electric control cabinet, cables, etc., and control the internal temperature of the unit.

For the units that add heat dissipation system and extract heat to the outside of the engine room, as shown in Figure 1, they will use the electric energy on the grid to increase the self-consumption of the unit; Pressure, causing external unclean air (dust, salt spray particles, etc.) to enter the unit, reducing the pollution and failure of the electrical components of the unit;

For increasing the heat dissipation system, the method of inputting cold air into the engine room to reduce the temperature of the unit, as shown in Figure 2, will increase the self-consumption power of the heat dissipation system due to the large heat dissipation;

The internal heat dissipation system increases the power consumption of the unit, which affects the power curve of the unit and reduces the market competitiveness of the unit.

Aiming at the shortcomings of a large amount of self-consumption of the unit and negative pressure of the unit brought about by the existing heat dissipation method, a heat dissipation design layout of the unit is proposed, which does not use unit power to achieve the purpose of reducing the internal temperature of the unit; and makes the internal air pressure of the unit higher than the outside world The air pressure forms a slight positive pressure of the unit to prevent the entry of external unclean air and protect the unit from external air pollution.

Publication No. CN106640554A Chinese patent discloses a wind turbine cooling structure, which includes a fan, more than one air inlet part arranged on the outer wall of the shroud 1 and an air outlet part arranged at the tail of the nacelle cover 3; The air inlet part is located in front of the hub 2, and its air inlet is set in the leeward direction of the shroud. For the cooling effect at the rear, refer to Figure 1 and Figure 2.

The Chinese patent with the publication number CN105863953A discloses a wind turbine blade. By setting the blade air channel inside and the air outlet on the outer surface, when the wind turbine blade rotates with the hub 2, air is formed between the air inlet and the air outlet. Under the action of the pressure difference, the air at the air inlet is guided to the air outlet through the air channel of the blade to be discharged. By setting the anti-backflow device 32 at the air outlet, it is possible to prevent air or rainwater from entering the inside of the wind turbine blade through the air outlet from the outside and further It affects the normal operation of the generator, but it will weaken the strength of the blade to a certain extent, and at the same time affect the power of the blade, and the air flow channel through the blade is connected to the engine room, the flow channel is complicated, and the production cost is high.

Utility model content

In order to solve the above problems, the utility model provides a heat dissipation structure of a wind power generating set and a wind power generating set. An air inlet is set at the fairing, and an air outlet is set at the end face of the tail end of the nacelle. The airflow overcomes the problems existing in the prior art.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a heat dissipation structure of a wind power generating set, including an impeller check valve, a salt spray filter device, a shroud, a nacelle and a moving shaft, and the windward side of the shroud is provided with a The air outlet, the impeller one-way valve is set inside the air inlet, the salt spray filter is installed on the leeward end face of the impeller one-way valve, the tail of the cabin is provided with an air outlet, and the inside of the air outlet is provided with a cabin one-way valve; One week inside the shaft is set.

Further, the flow area of the impeller check valve is larger than the flow area of the cabin check valve.

Further, an active motor is provided at the salt mist filtering device or the one-way valve in the engine room.

Further, dust-proof nets are arranged at the air inlet and the air outlet.

Further, a sealing door is provided on the leeward end surface of the cooling fin, and a gap is formed between the cooling fin and the sealing door.

Further, the cabin cabinet is arranged at the rear of the cabin, and cooling fins are arranged on the outer surface of the cabin cabinet.

Further, the air outlet is opened near the cabinet body of the cabin.

Further, a rainwater diversion pipe is also arranged at the impeller one-way valve.

Further, a temperature sensor is also arranged in the nacelle, and the temperature sensor is connected to the input end of the wind field control center.

Compared with the prior art, the utility model has at least the following beneficial effects:

Through the heat dissipation structure design of the unit, the cold air flowing outside is used to automatically dissipate the heat inside the unit; a slight positive pressure is automatically formed inside the unit, and the airflow takes away the heat in the cabin while preventing the entry of unclean objects from the outside; through the moving shaft Heat sinks are added to accelerate the heat dissipation and cooling of the drive train and improve heat dissipation efficiency.

Further, a sealing door is provided on the end surface of the cooling fin, and a gap is formed between the cooling fin and the sealing door, so that the airflow flows along the surface of the cooling fin, fully takes away the heat on the cooling fin, and improves the heat dissipation efficiency.

Furthermore, the air flowing outside is used without additional high-power motors, so that the self-consumption of the unit is relatively reduced, and the power curve and competitiveness of the unit are improved.

Description of drawings

Figure 1 is a schematic diagram of a unit that extracts heat to the outside of the nacelle.

Figure 2 is a schematic diagram of the unit for inputting heat into the cabin.

Fig. 3 is a schematic diagram of the heat dissipation structure of the present invention.

Fig. 4 is a partial sectional schematic diagram of the heat dissipation structure of the present invention.

Fig. 5 is a schematic diagram of the heat sink and the end face of the sealing door of the utility model.

In the accompanying drawings, 11 is the impeller check valve, 12 is the air duct, 13 is the salt mist filter device, 14 is the shroud, 15 is the hub cabinet, 16 is the hub, 21 is the transmission system, 22 is the bearing, 23 is the Radiating fin, 24 is a sealed door, and 33 is a base, and 34 is a cabin cabinet, and 35 is a one-way valve in a cabin.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 3 and Fig. 4, a kind of heat dissipation structure of wind power generating set provided by the utility model comprises impeller check valve 11, salt mist filtering device 13, shroud 14 and nacelle 3, and impeller check valve 11 is fixed on Inside the wind deflector 14, the salt spray filter 13 is fixed on the hub 16; the cabin check valve 35 is fixed at the rear of the cabin; the cooling fins 23 are arranged along the inner structure of the moving shaft 21; inside the wind deflector 14 and the cabin 3 Form the airflow passage, and the airflow passage passes through the shroud 14, the wheel hub 16, the moving shaft 21, the cabin cabinet body 34 and the entire interior space of the cabin 3; the airtight door 24 is set on the cooling fin 23; between the cooling fin and the airtight door The gap is formed so that the airflow flows along the surface of the heat sink, which fully takes away the heat on the heat sink and improves the heat dissipation efficiency.

When the unit is generating electricity, the impeller check valve 11 is opened, and the wind speed in the direction of the windward machine head is relatively high. It passes through the air duct 12 and enters the salt mist filter device 13, and the external wind is filtered by the salt mist filter device 13 to become clean air and then enters the interior of the hub 16. , the clean air takes away the heat generated by the hub cabinet 15 inside the hub 16; the heat generated by the bearing 22 is transmitted and diffused to the inside of the unit, and the heat sink 23 is helpful for the heat diffusion on the drive train.

Further, the airtight door 24 seals the cooling fins 23, and the air only flows in the gap between the cooling fins 23 and the moving shaft 21; the air inside the hub 16 flows into the sealing gap through the moving shaft 21, the cooling fins 23 and the internal structure of the drive train. The rear part of the door 24 makes the clean cold air fully contact with the moving shaft 21 of the unit, effectively reducing the temperature of the drive train.

After the clean air enters the interior of the cabin 3, the heat generated by the cabin cabinet 34 is taken away; the tail of the cabin 3 is provided with a cabin check valve 35, and when the unit is running, the cabin check valve 35 is opened; the filtered clean air is cooled and becomes After the paddle cabinet body 17, the bearing 22, the power cable distributed inside the engine room cabinet body 34 and the unit, the unit is discharged through the cabin check valve 35; the purpose of cooling the internal temperature of the unit is reached.

The cabin cabinet 34 is arranged at the tail of the cabin, and the outer surface of the cabin cabinet 34 is provided with cooling fins, and further air outlets are opened near the cabin cabinet 34, which is conducive to the air flow from the cabin cabinet 34 outer surface through the cooling fins to take away more heat.

As an embodiment, the salt mist filtering device 13 adopts commercially available products.

The direction of the machine head is in the high wind speed area, and the impeller check valve 11 and the cabin check valve 35 are opened to form a strong air flow; the outside air is purified after passing through the salt spray filter device 13, and the strong wind takes away the heat inside the unit; There is no need to generate power to discharge the temperature of the unit through the self-consumption of the unit; and the airflow area at the heat sink 23 is reduced, and the airflow area at both ends is larger than the airflow area at the heat sink 23, which is conducive to increasing the airflow speed.

The flow area of the impeller check valve 11 is greater than the flow area of the cabin check valve 35, that is, the air volume passing through the impeller check valve 11 is greater than the air volume passing through the cabin check valve 35, so that the air pressure inside the cabin is greater than the outside air pressure, forming a cabin The micro-positive pressure can prevent the unclean air from entering the unit, protect the pollution-sensitive components inside the unit, reduce the failure rate of the unit, and improve the reliability of the unit.

When the unit is not running, the impeller check valve 11 and the cabin check valve 35 are closed to isolate the outside air from entering the unit and protect the unit from outside air pollution.

As an optional embodiment, an active motor can also be set at the salt spray filter device 13 or the cabin check valve 35, and the output end of the active motor is connected to the impeller of the impeller check valve 11 and the cabin check valve 35; When the air volume increases, the motor starts to accelerate the speed and air volume of the internal air volume of the unit, further reducing the temperature of the high-efficiency unit; when the heat dissipation demand of the unit is small, the motor can not be started, so as to reduce the self-consumption of the unit while utilizing the external air flow; introduce external flow The cold air enters the unit to reduce the temperature of the unit and reduce the over-temperature failure rate of the unit; a slight positive pressure is formed inside the unit, which prevents external impurities from entering the unit and reduces the probability of pollution failure of internal components of the unit; the self-consumption of the unit is not used, which improves The power curve and comprehensive generating capacity of the unit.

When implementing a new wind farm, the wind power generators all adopt the heat dissipation structure of the wind power generators described in the utility model, and a suitable fan unit can also be selected for transformation during maintenance to achieve better heat dissipation.

The above content is only to illustrate the technical idea of the utility model, and cannot limit the protection scope of the utility model. Any changes made on the basis of the technical solution according to the technical idea proposed by the utility model all fall into the scope of the utility model. within the scope of protection of the claims.

Claims (10)

1. A wind turbine cooling structure is characterized in that it comprises an impeller check valve (11), a salt spray filter (13), a shroud (14), a nacelle (3) and a moving shaft (21), and the guide The windward side of the flow cover (14) offers an air inlet, and the impeller check valve (11) is arranged on the inside of the air inlet, and the salt spray filter (13) is installed on the leeward end face of the impeller check valve (11), and the cabin ( 3) The tail part is provided with an air outlet, and the cabin check valve (35) is arranged inside the air outlet; the cooling fin (23) is arranged along the inner side of the moving shaft (21) for a week. 2. The heat dissipation structure of the wind power generating set according to claim 1, characterized in that, the flow area of the impeller check valve (11) is larger than the flow area of the nacelle check valve (35). 3. The heat dissipation structure of the wind power generating set according to claim 1, characterized in that, an active motor is provided at the salt mist filtering device (13) or the one-way valve (35) of the nacelle. 4. The cooling structure of the wind power generating set according to claim 1, characterized in that dust-proof nets are provided at both the air inlet and the air outlet. 5. The heat dissipation structure of a wind power generating set according to claim 1, wherein a sealing door (24) is arranged on the leeward end surface of the cooling fin (23), and a gap is formed between the cooling fin (23) and the sealing door (24) . 6. The heat dissipation structure of the wind power generating set according to claim 1, characterized in that the cabin cabinet (34) is arranged at the rear of the cabin, and cooling fins are arranged on the outer surface of the cabin cabinet (34). 7. The heat dissipation structure of the wind power generating set according to claim 6, characterized in that, the air outlet is opened near the cabinet body (34) of the nacelle. 8. The heat dissipation structure of the wind power generating set according to claim 1, characterized in that, a rainwater guide pipe is also arranged at the impeller check valve (11). 9. The heat dissipation structure of the wind power generating set according to claim 1, characterized in that a temperature sensor is also arranged in the nacelle (3), and the temperature sensor is connected to the input end of the wind field control center. 10. A wind power generating set, characterized in that the cooling structure of the wind generating set according to any one of claims 1 to 9 is adopted.

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