CN211116408U - A kind of IP23 wind turbine with direct cooling cooling device - Google Patents

Abstract

The utility model discloses a wind driven generator aims at providing a simple structure, the good IP23 wind driven generator of the direct cold heat abstractor of adoption of radiating effect. It includes generator body and heat abstractor, the head end and the tail end of generator body are equipped with first air inlet and second air inlet respectively, the generator middle part is equipped with the gas outlet, heat abstractor arranges in generator body top, heat abstractor includes the casing, cooling blower and air outlet, the casing bottom is equipped with two first air intakes that correspond and communicate with first air inlet, second air inlet respectively, the second air intake, the casing lateral wall is equipped with a plurality of induction ports, form first air flue between induction port and first air intake and the second air intake, be equipped with on the casing with the blow vent of gas outlet adaptation, form the inside gas of help generator to the second air flue of arranging outward between blow vent and the air outlet. The utility model discloses saved the cost of making heat abstractor, promoted the power of generator, reduced the kilowatt-hour cost.

Description

A kind of IP23 wind turbine with direct cooling cooling device

technical field

The utility model relates to the field of wind power generation and heat dissipation, in particular to an IP23 wind power generator using a direct cooling heat dissipation device.

Background technique

The current mainstream wind turbine cooling methods on the market include: external air-to-air cooling with internal drive (IC616), external air-to-air cooling without internal drive (IC666), and external air-to-water cooling (IC86W). The above cooling methods are to ensure the IP level (IP54) of the generator, and they are all primary cooling media (gas or liquid media with a temperature lower than a certain part of the motor, which will come into contact with this part of the motor and take away the heat released by it. ) and the secondary cooling medium (gas or liquid whose temperature is lower than the primary cooling medium, the heat released by the primary cooling medium is taken away through the surface of the motor or the cooler) after heat exchange through the cooling device, and then the inside of the generator is cooled. . Due to the limitation of the efficiency of primary and secondary heat exchange, its heat dissipation effect is limited.

The protection level of the motor shell is composed of the letter IP plus two characteristic numbers. The first characteristic number indicates anti-solid, and the second characteristic number indicates anti-liquid. For example, in the IP23 wind turbine involved in the invention, the first characteristic number indicates protection against solids larger than 12mm from entering the motor, and the second characteristic number indicates a drip-proof motor, that is, water splashing within an angle of 60 degrees from the vertical line is harmless influences. The larger the IP characteristic number, the higher the degree of protection of the motor enclosure.

In terms of motor selection in my country, the protection level of the motor is generally given priority. The motor grade selected is getting higher and higher, and the price is also high. Regardless of the actual situation, the heat dissipation device installed on the motor is becoming more and more advanced, resulting in excess motor function. , low efficiency and waste of energy.

For generator applications that do not require high IP levels, we can change the heat dissipation device and use direct cooling. Since there is no heat exchange between the primary and secondary cooling media, the heat dissipation effect is greatly improved. And doing so not only saves the cost of manufacturing the heat sink, but also increases the power of the generator and reduces the cost of electricity. For wind turbines, since the generator works inside the nacelle, this cooling method can be used.

Chinese Patent Publication No. CN203289265, published on November 13, 2013, the invention is titled "Heat radiating device of a generator in a fan and a fan using the same", the application discloses a radiating device for a generator in a fan and its application The fan is related to the technical field of wind power generation, in order to solve the problems of high cost and large space occupation of the cooling device of the generator in the existing fan. The heat dissipation device of the generator in the fan includes a ventilation pipe with thermal conductivity, one end of the ventilation pipe is communicated with the radiator, and the other end is communicated with the casing of the generator in the fan, and the pipe body of the ventilation pipe is located in The outside of the nacelle in the fan. The utility model is suitable for the heat dissipation of the generator in the direct-drive wind power generating set. According to the solution provided by the utility model to dissipate heat to the generator, the effect may not be obvious, because it solves the problem of high manufacturing cost of the heat sink, and provides a ventilation pipe with a relatively small volume, which can accommodate a large amount of gas. Limited, the heat is dissipated by gas as a heat transfer medium, and the efficiency is not high.

SUMMARY OF THE INVENTION

The utility model overcomes the shortcomings of poor heat dissipation effect, complex structure and high manufacturing cost of the existing IP23 wind power generator heat dissipation device, and provides an IP23 wind power generator with a simple structure and good heat dissipation effect using a direct cooling heat dissipation device machine.

In order to solve the above-mentioned technical problems, the utility model is realized through the following technical solutions:

An IP23 wind power generator using a direct cooling radiator, comprising a generator body and a radiator, the first end and the rear end of the generator body are provided with air inlets, which are respectively a first air inlet and a second air inlet, There is an air outlet in the middle of the generator, and the heat dissipation device is arranged above the generator body. The heat dissipation device includes a casing, a cooling fan and an air outlet. The first air inlet and the second air inlet correspond to and communicate with each other. The side wall of the casing is provided with a number of air inlets. A first air channel is formed between the air inlet and the first air inlet and the second air inlet. There is a ventilation port matched with the air outlet of the generator, a second air passage for allowing the generator gas to be exhausted to the outside is formed between the ventilation port and the air outlet, and the cooling fan is arranged near the air outlet.

In order to reduce the cost of the radiator, the utility model adopts the method of taking away the heat inside the generator with flowing air, only one primary cooling medium is involved, the air will directly contact the internal components of the generator, and the heat exchange rate is higher. The reason why the heat dissipation device is arranged above the generator is because the hot air is relatively light, and it all rises. Due to the high air temperature inside the generator (the air temperature in the inner cavity of the generator is higher due to the heat generated by the operation of the generator set), it is convenient to move from above. The heat sink is discharged to the outside.

After the cooling fan is started, the air in the second air passage is first drawn out of the heat sink, and the hot air inside the generator is guided to move to the outside from the air outlet and then through the second air passage, and the hot air inside the generator flows through After the air outlet, the air vent, the second air passage and the air outlet, it is discharged to the atmosphere. At this time, because the air inside the generator is drawn away, the air pressure is low. The air port enters the generator and transfers heat to the heat-generating components inside the generator to achieve cooling. As long as the cooling fan has been running, the cooling device will continue to play a cooling effect.

Preferably, filter cotton is provided on the air inlet. Since the cold air entering the generator from the suction port for cooling will come into direct contact with the internal parts of the generator, in order to prevent the impurities in the cold air from causing wear on the internal parts of the generator, the suction port is equipped with a filter to adsorb and filter impurity particles. filter cotton.

Preferably, a wind pressure sensor is provided on the side of the filter cotton facing the inside of the casing, and the wind pressure sensor maintains communication with the external control system. After the filter cotton absorbs a certain amount of impurities, the performance of adsorption and filtration will be significantly reduced. This performance decline will lead to a significant change in the air pressure entering the housing. The air pressure sensor installed on the inside of the filter cotton can capture information in time. , inform the staff that the air pressure has changed significantly, which may be caused by the decline in the performance of the filter cotton, and remind the replacement of the filter cotton.

Preferably, sound-absorbing cotton is provided on the air outlet. Since the cooling device has only one outlet for exhausting air, there are many openings for inhaling air, which will result in a particularly large air volume and high wind speed at the air outlet, and at the same time, the noise at the air outlet is also particularly loud. The device with sound-absorbing cotton can effectively reduce the abnormal noise at the air outlet and reduce noise pollution.

Preferably, the top of the casing is provided with an opening that is the same size as the air inlet, and a filter cotton is provided on the opening. The new opening at the top of the casing can reduce the pressure of the original air inlets on the casing, improve the air intake efficiency of the casing, and make the external cold air more quickly replenished inside the generator, while reducing the overall The weight of the heat sink brings convenience to the installation of the heat sink.

Preferably, the air outlet channel formed between the cooling fan and the air outlet is a prismatic structure, and the cross-sectional area of the air outlet channel gradually decreases from an end away from the air outlet to an end adjacent to the air outlet. The closer the air outlet is to the air outlet, the narrower the air outlet, so that the speed of air outlet will become faster, and the hot air inside the generator will also enter the air outlet channel more quickly, improving the heat dissipation efficiency of the entire cooling device.

Preferably, a retaining ring is embedded at the air outlet, and the outer edge of the retaining ring is in close contact with the air outlet in the circumferential direction. Due to the fast air velocity at the air outlet, the stress at the local position on the originally designed square air outlet will be relatively large. After adding the guard ring, the shape of the air outlet becomes circular, which reduces the impact of the air on the air outlet, and the air outlet is not easily deformed.

Compared with the prior art, the beneficial effects and advantages of the present utility model are:

A cooling device is arranged above the generator body, allowing the hot air in the generator body to be discharged upwards according to the natural law, and the cooling fan can work with low power to achieve air heat dissipation and save energy;

The cooling device is arranged with a plurality of airflow channels for the cooling air to enter the generator to improve the internal heat dissipation efficiency of the generator;

The air intake channel (supplementing the generator with external cold air) and the exhaust channel (exhausting the hot air that has completed heat exchange in the generator from the generator) set in the heat dissipation device are independent of each other, and no heat exchange will occur, improving the efficiency of the cooling system. The cooling efficiency of wind turbines;

The filter cotton with filtering effect set on the suction port can prevent dust and impurities in the air from entering the generator and reduce the damage to the internal parts of the generator caused by external air;

The wind pressure sensor can timely feedback the performance of the filter cotton, and has the function of reminding the replacement of the filter cotton;

The air outlet of the heat dissipation device is provided with a sound-absorbing surface that can reduce noise, which can reduce the noise pollution generated by the cooling fan when dissipating heat;

The air outlet channel of the cooling fan is designed as a prismatic structure, which can speed up the discharge speed of hot air to the outside, increase the discharge speed of hot air, and further improve the suction (supplementary cold air) efficiency of the generator.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Figure 2 is a schematic structural diagram of a heat sink;

In the figure: generator body 1, cooling device 2, casing 21, cooling fan 22, air outlet 23, air inlet 3, first air inlet 31, second air inlet 32, air outlet 4, first air inlet Air outlet 5, second air inlet 6, suction port 7, ventilation port 8, filter cotton 9, muffler cotton 10.

Detailed ways

Below in conjunction with the accompanying drawings and specific embodiments, the present utility model is described in further detail:

As shown in Figures 1 and 2, an IP23 wind turbine using a direct cooling radiator includes a generator body 1 and a radiator 2. The first end and the rear end of the generator body 1 are provided with air inlets, which are respectively The first air inlet 31 and the second air inlet 32, an air outlet 4 is provided in the middle of the generator, the heat dissipation device 2 is arranged above the generator body 1, and the heat dissipation device 2 includes a casing 21, a cooling fan 22 and an air outlet 23. The bottom of the housing 21 is provided with two first air inlets 5 and second air inlets 6 which correspond to and communicate with the first air inlet 31 and the second air inlet 32 respectively. Air port 7, a first air passage is formed between the air inlet 7 and the first air inlet 5 and the second air inlet 6, and the housing is provided with a vent 8 adapted to the air outlet 4 of the generator, and ventilation A second air passage for allowing the generator gas to be exhausted to the outside is formed between the port 8 and the air outlet 23 , and the cooling fan 22 is arranged near the air outlet 23 .

The air will enter the generator from the first air passage, and at the same time, it will be in direct contact with the generator components as a primary cooling medium, and heat exchange will occur. A heat sink 2 is arranged above the generator, and the air inside the generator becomes hot air when heated. The hot air has a small specific gravity and will rise upward, and the hot air just enters the second air passage from the air outlet.

After the cooling fan 22 is started, the air in the second air passage is first drawn out of the heat sink 2, so that a vacuum or a low pressure area is formed in the second air passage. At this time, the gas inside the generator will enter the second air passage, and then It is further discharged into the atmosphere through the air outlet 23 .

Specifically, because the air in the second air passage is drawn away by the cooling fan 22, the air pressure is low, and the cold air with high air pressure outside the heat sink 2 will first enter the housing 21 from the air inlet 7 on the housing 21. The first air passage inside the generator then enters the generator through the air inlets 3 at both ends of the generator and conducts heat transfer with the heat-generating components inside the generator to achieve cooling.

A filter cotton 9 is provided on the suction port 7 . When the outside air enters the heat sink 2, some impurities in the air will remain on the filter cotton 9, and the filtered clean air will not cause wear on the inner wall of the air passage or the parts in the generator after entering the air passage or the inside of the generator.

Then, a wind pressure sensor is provided on the side of the filter cotton 9 facing the inside of the housing 21, and the wind pressure sensor maintains communication with the external control system. The air pressure sensor can capture the air pressure in the airway in time, inform the staff that the air pressure has changed significantly, which may be caused by the performance of the filter cotton, and remind the staff to check the filter cotton and replace it in time.

The air outlet 23 is provided with sound-absorbing cotton 10 . The sound-absorbing surface can effectively reduce the abnormal noise at the air outlet and reduce noise pollution.

The top of the casing 21 is provided with an opening that is the same size as the air inlet, and the opening is provided with a filter cotton 9 . The new opening at the top of the casing can reduce the pressure of the original air inlets on the casing, improve the air intake efficiency of the casing, and make the external cold air more quickly replenished inside the generator, while reducing the overall The weight of the heat sink brings convenience to the transportation and installation of the heat sink.

The air outlet channel formed between the cooling fan 22 and the air outlet 4 is a prismatic structure, and the cross-sectional area of the air outlet channel gradually decreases from the end away from the air outlet to the end adjacent to the air outlet. When the air flows through the air outlet channel, the air flow speed will become faster because the air outlet channel becomes narrower, and the faster air flow speed can improve the overall heat dissipation efficiency.

A guard ring is embedded at the air outlet 23, and the outer edge of the guard ring is in close contact with the air outlet in the circumferential direction. When the air flows out of the air outlet, the local stress on the square air outlet will be relatively large. After the guard ring is added, the shape of the air outlet becomes circular, which reduces the impact of the air on the air outlet, the air outlet is not easily deformed, and the service life becomes longer.

Claims (7)

1. An IP23 wind driven generator adopting a direct cooling heat dissipation device is characterized by comprising a generator body and the heat dissipation device, wherein the head end and the tail end of the generator body are provided with air inlets which are respectively a first air inlet and a second air inlet, the middle part of the generator is provided with an air outlet, the heat dissipation device is arranged above the generator body and comprises a shell, a cooling fan and an air outlet, wherein the bottom of the shell is provided with two first air inlets and two second air inlets which correspond to and are communicated with the first air inlets and the second air inlets respectively, the side wall of the shell is provided with a plurality of air suction ports, a first air passage is formed between the air suction ports and the first air inlets and between the air suction ports and the second air inlets, the shell is provided with air vents matched with the air outlets of the generator, a second air passage allowing the generator to exhaust air outwards is formed between the air vents and the air outlet, and the cooling fan is arranged near the air.

2. The IP23 wind driven generator using direct cooling heat sink as claimed in claim 1, wherein the air inlet is provided with filter cotton.

3. The IP23 wind generator with direct cooling heat sink as claimed in claim 2, wherein the filter cotton is provided with a wind pressure sensor on its side facing the inside of the housing, the wind pressure sensor is in communication with an external control system.

4. The IP23 wind driven generator adopting the direct cooling heat dissipation device according to claim 1, wherein the air outlet is provided with sound deadening cotton.

5. The IP23 wind driven generator using direct cooling heat dissipation device according to claim 2, wherein the top of the housing has an opening as large as the air suction opening, and the opening has filter cotton.

6. The IP23 wind driven generator using direct cooling heat dissipation device according to claim 1, wherein the air outlet channel formed between the cooling fan and the air outlet is of a frustum pyramid structure, and the cross-sectional area of the air outlet channel gradually decreases from the end far away from the air outlet to the end near the air outlet.

7. The IP23 wind driven generator adopting the direct cooling heat dissipation device as claimed in claim 1, wherein a retainer is embedded at the air outlet, and the outer edge of the retainer is tightly attached to the air outlet in the circumferential direction.

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