CN205277721U - Wind generating set's cooling system and wind generating set - Google Patents

Abstract

Embodiments of the present utility model provide a heat dissipation system for a wind turbine and a wind turbine. The wind turbine includes an air inlet provided on the propeller side of the nacelle, and an air outlet provided at the bottom of the nacelle. The air outlet is provided with The first fan, the air inlet, the cabin and the air outlet form a first heat dissipation channel; the air inlet is provided on the side wall of the engine room and/or the tower, the second fan is located at the air inlet, and the first air duct, One end of the first air duct is connected to the air inlet, and the other end is the air outlet. The air inlet, air duct and air outlet form a second heat dissipation channel; the wind turbine also includes an air exhaust outlet provided on the side wall of the tower. The heat dissipation system is effective and avoids mutual influence between heat sinks.

Description

Cooling system of wind power generating set and wind power generating set

technical field

The utility model relates to the technical field of wind power generation, in particular to a cooling system of a wind power generator set and the wind power generator set.

Background technique

With the demand of the wind power generation market becoming more and more refined and the wind power generation technology becoming more mature, the power of the wind power generating set is getting larger and larger, so that the heat generation of each heating component in the wind power generating set is increasing, resulting in the temperature inside the unit Higher and higher. In addition, the working environment of wind turbines in some areas is poor. For example, some wind turbines work in areas with relatively high temperatures, or when they work in high-temperature environments in summer, some components (components with operating temperature requirements) in the wind turbines have been exhausted. It cannot work normally, and the unit has to be shut down to cool down. As a result, the power generation efficiency of the wind power generating set is seriously affected.

Therefore, how to effectively reduce the operating temperature of the main components of the wind power generating set has become one of the key issues in this field. Currently operating wind turbines mainly adopt air-cooled or liquid-cooled cooling methods, or a combination of air-cooled and liquid-cooled cooling methods. Failure to treat different heating elements differently, resulting in poor overall cooling effect, and uneven heat dissipation temperature of components (part of the heat sink is affected by the hot air after cooling in the heat dissipation channel), resulting in large temperature differences between components , affecting its lifespan.

Utility model content

The purpose of the utility model is to solve the problem that different cooling bodies cannot be treated differently under centralized or unified cooling methods, so that the cooling bodies affect each other, resulting in poor overall cooling effect.

According to one aspect of the present invention, a heat dissipation system for a wind power generating set is provided. The wind generating set includes an air inlet part arranged on the blade side of the nacelle, and an air outlet part arranged at the bottom of the nacelle. A fan, the air inlet part, the cabin and the air outlet part form a first heat dissipation channel; the air inlet arranged on the side wall of the nacelle and/or the tower, the second fan arranged at the air inlet, and the first air duct, the second One end of an air duct communicates with the air inlet, and the other end is an air outlet, and the air inlet, air duct and air outlet form a second heat dissipation channel; the wind power generating set also includes an air exhaust port arranged on the side wall of the tower.

Preferably, the nacelle includes a nacelle base, the nacelle base divides the interior space of the nacelle into a first area close to the top of the tower and a second area away from the top of the tower, the air inlet, the first area and the air outlet form a first heat dissipation aisle.

Preferably, the radiating body is a radiating body including a first heat zone located in the nacelle and a second heat zone located in the tower, the air inlet is arranged on the side wall of the nacelle away from the paddle, and the first air duct surrounds the first hot zone and direct the cooling air to the second hot zone.

Preferably, a first grid plate is provided at the air outlet, and the first grid plate is located above the first fan.

Preferably, a second air duct is provided at the air outlet, and the outlet end of the second air duct faces the middle tower platform of the tower and is located above the middle tower platform.

Preferably, an opening is provided on the platform of the middle section of the tower, and a second grid plate is provided at the opening.

Preferably, the air outlet is arranged above the tower door at the bottom of the tower.

Preferably, a third fan is provided at the air outlet.

According to another aspect of the present utility model, a wind power generating set is provided, which includes a heat dissipation system, and the heat dissipation system is the above heat dissipation system.

Preferably, the heat dissipation system further includes a main control system, and the main control system controls the first heat dissipation channel and/or the second heat dissipation channel of the heat dissipation system as required.

According to the heat dissipation system of the wind power generation set provided by the embodiment of the present invention, the first heat dissipation passage and the second heat dissipation passage which are independent of each other are used to dissipate heat respectively to the heat dissipation body in the cabin and/or tower of the wind power generation set, avoiding Under the traditional centralized or unified heat dissipation method, the mutual influence between heat sinks and the problem of insufficient heat dissipation cannot be solved.

Description of drawings

Fig. 1 is a schematic layout structure diagram of a cooling system of a wind power generating set.

Explanation of reference numbers:

20. Engine room; 21. Tower; 1. Converter; 2. Tower door; 3. The third fan; 4. Power cable; 5. The second grid plate; 6. The first air duct; 7. The first Two air ducts; 8. The first fan; 9. The first grid plate; 10. The second fan; 11. The cabin cabinet; 12. The inverter cabinet; 13. The main control layer; A. The first hot zone; B. Second hot zone.

detailed description

The heat dissipation system of the wind power generating set according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Fig. 1, in the embodiment of the present utility model, provide a kind of cooling system of wind power generating set, mainly be used for the cooling body in the nacelle 20 of wind generating set and/or tower tube 21 (for convenience of description, hereinafter All the components that need to dissipate heat are collectively referred to as radiators) to provide heat dissipation.

The heat dissipation system includes a first heat dissipation channel. The first heat dissipation channel includes an air inlet part, a nacelle 20 and an air outlet part. Wherein, the air inlet part is arranged on the blade side of the nacelle 20 (that is, the side of the nacelle 20 close to the pitch system), specifically, there are gaps between the windshield and the generator and between the windshield and the blade root. , outside air can enter through these gaps. The nacelle 20 is provided with a nacelle base, the nacelle base includes the bottom of the nacelle 20 and the arc cover, and the nacelle base divides the interior space of the nacelle 20 into a first area near the top of the tower 21 (the area surrounded by the bottom of the nacelle and the arc cover) and the second area away from the top of the tower 21 (the area in the nacelle 20 except for the first area). The air outlet is arranged at the bottom of the nacelle 20 in the first area, that is, on the nacelle platform. Preferably, the air outlet is arranged at the bottom of the nacelle 20 away from the pitch system. A first fan 8 (axial flow fan) is provided at the air outlet to provide power for the airflow. In this way, the air inlet part, the first area in the nacelle 20, and the air outlet part form the first heat dissipation passage of the heat dissipation system. The aforementioned first heat dissipation passage basically includes all the radiators in the nacelle 20, and in the Under the limited space of the first area, the airflow circulation in the first heat dissipation channel is better, so that the first heat dissipation channel can more efficiently use the incoming wind from the air inlet part (blade side) to dissipate heat. Its working principle is as follows: when the heat dissipation system is working, the first fan 8 of the air outlet part is turned on, forcing the external cooling gas to enter the hub from the gap between the blade root of the pitch system and the shroud and the gap between the shroud and the generator, and Cool the pitch cabinet in the hub and the shafting of the generator (the inner surface of the fixed shaft of the generator) in sequence, and then cool the frequency converter cabinet 12 and the cabinet cabinet 11 in the first area of the nacelle 20, and the cooled gas passes through the air outlet The part is discharged into the tower tube 21. This is the cooling path of the first heat dissipation channel, and the first heat dissipation channel mainly provides heat dissipation for the hub, the generator and the radiator in the nacelle 20 .

The heat dissipation system also includes a second heat dissipation channel, and the second heat dissipation channel can independently perform heat dissipation for the heat dissipation body in the nacelle 20 and/or the tower 21 (not affected by the first heat dissipation channel). The second heat dissipation channel includes an air inlet, which communicates with one end of the first air pipe 6 , and the other end of the first air pipe 6 is an air outlet. Wherein, the air inlet is arranged on the side wall of the nacelle 20 and/or the tower 21, and the second fan 10 is provided at the air inlet, so that the external cooling air is sucked in from the outside, and the cooling body is cooled by the first air duct 6. Heat dissipation.

Specifically, the location of the air inlet depends on the needs of the actual situation. When the second heat dissipation channel is required to dissipate heat to the radiator in the cabin 20 alone, the air inlet can be arranged on the side wall of the cabin 20; When dissipating heat from the radiator in the tower 21 , the air inlet can be arranged on the side wall of the tower 21 . For example, when the second heat dissipation channel alone radiates heat to the radiator in the tower tube 21, the air inlet of the second heat dissipation channel is arranged on the side wall of the tower tube 21, and the air outlet of the second heat dissipation channel directly faces the tower tube 21 For another example, when the second heat dissipation channel needs to dissipate heat to the two heat sinks in the tower tube 21 at the same time, the air outlets of the second heat dissipation channel can be set to two, facing the two air outlets in the tower tube 21 respectively. The radiating body is used to blow air to the two radiating bodies in the tower 21 at the same time, so as to achieve the effect of heat dissipation. Of course, the heat dissipation form of the first heat dissipation channel can also be designed according to the actual needs of the heat dissipation body, and should not be limited to the situations listed in the embodiments of the present invention.

In order to facilitate the smooth discharge of the hot gas after the use of the first and second heat dissipation channels, the heat dissipation system also includes an air exhaust port arranged on the side wall of the tower 21, and a third fan 3 located at the air exhaust port. The function of 3 is to suck out the hot gas after cooling in the tower tube 21 and discharge it to the outside. Of course, the number of air outlets and fans can be one or more, which are set according to the heat dissipation effect under actual working conditions, and there is no limitation here.

The heat dissipation system of the wind power generation set provided by the above-mentioned embodiments uses independent first heat dissipation passages and second heat dissipation passages to respectively dissipate heat from the heat dissipation body in the nacelle 20 or the tower 21 of the wind power generation set, avoiding the traditional In centralized or unified heat dissipation mode, part of the heat sink is affected by the hot air after heat dissipation in the heat dissipation channel, and cannot obtain sufficient heat dissipation.

In order to effectively solve the heat dissipation problem of the special radiator in the nacelle 20 or tower 21, for example, take the radiator as an example of the power cable 4. Due to the requirements of use, the power cable 4 is usually laid out from the nacelle 20 and hangs to Tower 21 bottom. During use, the part of the power cable 4 located in the nacelle 20 and the twisted cable part located in the tower 21 usually generate severe heat. In the following for simplified description, the high-heat part of the power cable 4 in the nacelle 20 is called the first hot zone A, and the high-heat part of the power cable 4 at the twisted cable is called the second hot zone B. And when the cooling gas coming in from the air inlet part of the first radiating channel flows to the power cable 4 in the nacelle 20, it has been heated by the radiators along the way (the pitch cabinet in the hub, the shafting of the generator, and the frequency converter cabinet 12) , and then go to the first heat zone A of the power cable 4 with a higher cooling temperature, the effect will be very unsatisfactory, and it is likely that the cooling effect will not be achieved.

In order to solve the heat dissipation problem of the power cable 4, the air inlet of the second heat dissipation channel is arranged on the side wall of the nacelle 20 away from the paddle side, preferably on the tail of the nacelle 20, and the first air duct 6 passes through the nacelle base The first hot zone A surrounded behind the arc-shaped cover of the arc hood guides the cooling gas to the second hot zone B inside the tower 21 . In this way, under the rotation of the second fan 10 (axial flow fan), the second heat dissipation channel directly inhales cold air from the outside, passes through the first air duct 6 (insulated air duct) to dissipate heat to the first heat zone A and then to the second heat dissipation channel. The hot zone B dissipates heat, and finally discharges the dissipated gas to the tower 21 . Thus, the heat dissipation problem of the power cable 4 of the special radiator is effectively solved. In order to further meet the heat dissipation requirements of key areas, air inlets and air ducts can be separately provided on the side wall of the tower 21 to make it radiate heat to the second thermal zone B alone, so as to ensure that the power cable twisting zone (second thermal zone B) is reached. Area B) heat dissipation requirements.

In addition to the above-mentioned heat sink being a special heat sink such as a power cable, the heat sink can also be other heat sinks including two thermal zones. The channel dissipates heat for it alone, and will not be repeated here.

In order to further improve the heat dissipation effect of the heat dissipation system, a second air duct 7 is provided at the air outlet of the first heat dissipation channel. The outlet end of the second air duct 7 faces the middle tower platform of the tower 21 and is located above the middle tower platform. Correspondingly, openings are provided on the tower platform in the middle section below the outlet end of the second air duct 7 . The function of the second air pipe 7 is to guide the hot air discharged from the air outlet to the middle of the tower 21, so as to avoid affecting the second hot zone B of the power cable 4 when the hot air discharged from the air outlet flows downward. In this way, the radiating gas in the first radiating channel flows out from the air outlet and is pumped into the middle of the tower 21 through the second air pipe 7 , and finally continues to be discharged downward through the opening on the platform in the middle of the tower 21 .

In consideration of safe operation, a first grid plate 9 is provided at the air outlet of the first heat dissipation channel, and the first grid plate 9 is located above the first fan 8 . The function of the first grid plate 9 is not only to allow cold air to pass through, but also to ensure that personnel will not fall from the air outlet to the tower 21 when operating the second air duct 7 and cause safety accidents. In addition, because the first grid plate 9 is located above the first fan 8, corresponding tools can also be prevented from falling into the first fan 8 on the nacelle platform. A second grid plate 5 is provided at the opening on the tower platform in the middle section, and the second grid plate 5 also plays the role of ventilation and accident prevention, and will not be repeated here.

In order to effectively discharge the hot air from the first heat dissipation channel and the second heat dissipation channel, the air outlet on the tower wall and the third fan 3 are arranged above the tower door 2 at the bottom of the tower 21 . During use, under the rotation of the fan (the fan drives the gas flow in the tower 21, thereby driving the gas flow of the entire wind power generating set), the hot gas discharged from the middle of the tower 21 is quickly sucked out and discharged to the outside through the air outlet, thereby A general cycle of the heat dissipation system of the entire wind generating set is completed, and the purpose of cooling the entire wind generating set is achieved. On the other hand, the third fan 3 can also extract the hot air in the main control layer 13, and avoid introducing the hot air into the converter 1 below, which will not affect the heat dissipation of the converter 1 (the converter 1 has its independent cooling system).

The heat dissipation system of the wind power generation set provided by the embodiment of the utility model can cool the heat dissipation body or the heat dissipation Multiple high-heating parts of the body, and because the two heat dissipation channels are independent of each other and do not affect each other, it effectively avoids the traditional centralized or unified heat dissipation method. Part of the heat dissipation body is affected by the heat in the heat dissipation channel and cannot be fully dissipated. The problem.

The utility model also provides a wind power generating set, including the above-mentioned heat dissipation system, and also includes a main control system, the main control system controls the first heat dissipation channel and/or the second heat dissipation channel of the heat dissipation system according to needs. Specifically, the main control system pre-sets the control logic, and independently controls the activation of the second heat dissipation channel according to needs, and performs heat dissipation on the power cable 4 or other heat dissipation bodies that require it. In other words, when the sensor detects that the heat dissipation temperature in the first heat dissipation channel is too high, an alarm is issued or the first fan 8 is controlled and adjusted to increase the heat dissipation intensity of the first heat dissipation channel. The wind generating set can save energy to the greatest extent, and make the cooling system of the wind generating set more intelligent.

The heat dissipation system of the wind power generating set provided by the utility model has the following technical effects:

The heat dissipation system of the wind power generating set in the embodiment of the utility model can independently dissipate heat from heat sinks with relatively large heat dissipation or different heating areas of heat sinks by establishing two independent heat dissipation channels, so that the main heat sinks in the wind power generating set can Balanced heat dissipation is obtained, and mutual influence between heat sinks is avoided (part of the heat sink is affected by the hot air after heat dissipation in the heat dissipation channel, and cannot be fully radiated). On the other hand, the heat dissipation system of the wind power generating set has a simple heat dissipation method, is convenient for operation, maintenance and repair, and has low cost and strong practicability. Compared with the heat dissipation system of traditional wind turbines, it effectively avoids the risk of leakage of various cooling media caused by the application of traditional cooling systems.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. a heat-removal system for wind power generating set, described wind power generating set comprises cabin (20) and tower cylinder (21), it is characterised in that,

Comprise the inlet section being arranged on described cabin (20) oar side, and it is arranged on the outlet section of bottom, described cabin (20), described outlet section place is provided with the first fan (8), and described inlet section, described cabin (20) and described outlet section form the first heat dissipation channel;

It is arranged on and described cabin (20) and/or described tower cylinder (21) sidewall enter air port, the 2nd fan (10) at air port place is entered described in being located at, and first airduct (6), one end of described first airduct (6) with described enter air port be connected, the other end for going out air port, described in enter air port, described airduct and described air-out interruption-forming the 2nd heat dissipation channel;

Also comprise the air draft mouth being arranged on described tower cylinder (21) sidewall.

2. the heat-removal system of wind power generating set according to claim 1, it is characterized in that, described cabin (20) comprises engine room foundation, the internal space of described cabin (20) is separated into the first area near described tower cylinder (21) top and the 2nd region away from described tower cylinder (21) top by described engine room foundation, and described inlet section, described first area and described outlet section form the first heat dissipation channel.

3. the heat-removal system of wind power generating set according to claim 1, it is characterized in that, radiator is the first hot-zone (A) comprising and being positioned at described cabin (20) and the radiator being positioned at the 2nd hot-zone (B) of described tower cylinder (21), described enter air port be arranged on the sidewall away from described oar side in described cabin (20), described first airduct (6) is surrounded described first hot-zone (A) and cooling air is drained to described 2nd hot-zone (B).

4. the heat-removal system of wind power generating set according to claim 1, it is characterised in that, described outlet section place is provided with the first turbogrid plates (9), and described first turbogrid plates (9) are positioned at the top of described first fan (8).

5. the heat-removal system of wind power generating set according to claim 1, it is characterized in that, described outlet section place is provided with the 2nd airduct (7), the exit end of described 2nd airduct (7) is towards the stage casing tower barrel platform of described tower cylinder (21), and is positioned at above the tower barrel platform of described stage casing.

6. the heat-removal system of wind power generating set according to claim 5, it is characterised in that, described stage casing tower barrel platform is provided with perforate, and described tapping is provided with second gate lattice plate (5).

7. the heat-removal system of wind power generating set according to claim 1, it is characterised in that, described air draft mouth is arranged on tower cylinder door (2) top of described tower cylinder (21) bottom.

8. the heat-removal system of wind power generating set according to claim 1, it is characterised in that, described air draft mouth place is provided with three fan (3).

9. a wind power generating set, comprises heat-removal system, it is characterised in that, described heat-removal system is the heat-removal system described in claim 1 to 8 any one.

10. wind power generating set according to claim 9, it is characterised in that, also comprise master control system, described master control system controls the first heat dissipation channel and/or the 2nd heat dissipation channel of described heat-removal system.