CN205135923U - Become oar cabinet cooling device and wind generating set - Google Patents

Abstract

The utility model provides a pitch cabinet cooling device and a wind power generator set, which include a heat collecting device and a condenser. The heat collecting device is arranged at the heating part of the pitch cabinet. A pipe is connected between the heat collecting device and the condenser. The paths are connected to form a loop, and a cooling medium is provided in the loop. The cooling medium absorbs heat and vaporizes in the heat collecting device, releases heat and liquefies in the condenser, and the cooling medium circulates in the loop. The technical solution of the utility model effectively solves the over-temperature problem of the pitch cabinet, so that the wind turbine generator set will not shut down due to the over-temperature of the pitch cabinet, and improves the availability of the wind turbine generator set and the revenue of the whole machine. The technical solution of the utility model The overall temperature of the pitch cabinet is kept at a lower temperature, which provides a good working environment for the electrical components in the cabinet, improves the reliability of the electrical components, and extends the service life of the electrical components; the device has a simple structure, is easy to install, and has high reliability durability and long service life.

Description

Pitch cabinet cooling device and wind turbine

technical field

The utility model relates to the technical field of wind power generation, in particular to a pitch change cabinet cooling device and a wind power generating set.

Background technique

The pitch system is an important part of the variable speed and pitch wind turbine. It realizes the stable output of the wind turbine power by adjusting the pitch angle of the blades when the wind turbine is above the rated wind speed. The safe operation of the generator set plays a vital role, so the stable operation and maintenance of the pitch system is an important guarantee for the continuous output of wind turbine power.

The electronic control devices in the pitch system will generate heat during operation, which needs to be dissipated to ensure the normal operation of the pitch system. As the shell of the pitch system, the pitch cabinet is generally installed in the impeller hub of the wind turbine, and the impeller hub is generally a relatively closed structure. This installation environment makes the pitch cabinet unable to perform good cooling and heat dissipation. The downtime of wind turbines caused by the overheating of the pitch cabinet of wind turbines is a difficult problem of concern in the wind power industry. The problem of wind turbine shutdown often occurs due to the overtemperature of the pitch control cabinet, which reduces the availability of wind turbines, wastes a lot of wind energy resources, directly affects the power generation of wind turbines, and reduces the wind turbines. Generation income.

Chinese utility model patent CN204539697U discloses a heat dissipation structure of a pitch cabinet and a pitch cabinet, and the pitch cabinet is cooled by forced air cooling. The patent adopts the form of optimizing the external structure of the pitch cabinet, adding cooling fins, designing the installation position of the fan and the way of cooling air duct to carry out forced ventilation and cooling of the pitch cabinet. However, the forced air cooling of the pitch cabinet has the disadvantages of affecting the cooling effect of the pitch cabinet due to factors such as uncontrollable air volume and wind pressure. , the air inside this space can only circulate in this narrow space, and the heat dissipation effect is limited. Moreover, due to the existence of the heat source of the pitch control cabinet, the air temperature in this part continues to rise, so the cooling method of forced air cooling is adopted here The effect is very small, and the purpose of cooling the pitch cabinet cannot be achieved.

Utility model content

The purpose of the utility model is to provide a cooling device for the pitch cabinet and a wind power generating set, so as to improve the cooling and heat radiation effect of the pitch cabinet.

In order to achieve the above purpose, the utility model provides a cooling device for the pitch cabinet, which includes a heat collecting device and a condenser. The heat collecting device is arranged at the heating part of the pitch cabinet. The pipelines are connected to form a circuit, and a cooling medium is provided in the circuit. The cooling medium absorbs heat and vaporizes in the heat collecting device, releases heat and liquefies in the condenser, and the cooling medium circulates in the circuit. .

Preferably, the pipeline includes a gas collecting pipe and a liquid return pipe, both of which are arranged between the heat collecting device and the condenser.

Preferably, heat dissipation fins are provided on the heat generating part of the pitch cabinet, the heat collecting device is a heat pipe, and the heat pipe is arranged in a gap of the heat dissipation fin.

Preferably, a heat collecting box is provided at the heating part of the pitch cabinet.

Preferably, a temperature sensor is provided on the pitch cabinet, and the temperature sensor transmits a temperature signal to the wind power generator control unit.

Further, heat dissipation fins are arranged on the heat generating part of the pitch cabinet, and the temperature sensor is arranged on the heat dissipation fins.

Preferably, the condenser is arranged in the wind turbine wind turbine wind turbine wind turbine.

Further, a fan is also provided on the condenser.

Further, the fan is controlled by the wind generator control unit.

The utility model also provides a wind power generating set, including any cooling device for the pitch cabinet mentioned above.

Beneficial effect:

The cooling device for the pitch cabinet and the wind turbine set above adopt the heat exchange method of evaporative cooling in the pipeline to cool the pitch cabinet, which fundamentally overcomes the uncontrollable air volume and wind pressure in the process of forced air cooling for the pitch cabinet. Factors affecting the cooling effect of the pitch cabinet, the cooling effect of this technical solution far exceeds the cooling effect of forced air cooling.

At the same time, the technical solution of the utility model solves the problem of air circulation and heat dissipation in a narrow and relatively closed environment where the pitch cabinet is located. Due to the solution to the over-temperature problem of the pitch cabinet, the wind turbine will not shut down due to the over-temperature of the pitch cabinet, which improves the availability of the wind generator, makes the operation of the wind generator more sustainable, and absorbs more wind energy. Improve the income of the whole machine.

The cooling method of the pitch control cabinet in the technical scheme of the utility model can keep the pitch control cabinet at a lower temperature as a whole, thereby providing a good working environment for the electrical components in the cabinet and improving the reliability and service life of the electrical components; the utility model Technical Solution The device has a simple structure, is easy to install, basically does not need daily maintenance, and has high reliability and long service life.

Description of drawings

Fig. 1 is a schematic front view of the structure of the pitch cabinet cooling device in Embodiment 1 of the present utility model;

Fig. 2 is a schematic right view of the structure of the pitch cabinet cooling device in Embodiment 1 of the present utility model;

Fig. 3 is a schematic front view of the structure of the pitch cabinet cooling device in the second embodiment of the utility model;

Fig. 4 is a schematic right view of the structure of the pitch cabinet cooling device in the second embodiment of the utility model;

Fig. 5 is a schematic structural view of the wind power generating set in the third embodiment of the utility model;

Fig. 6 is an enlarged schematic diagram of the installation position A of the pitch cabinet in Embodiment 3 of the present utility model.

Reference signs:

10-pitch cabinet, 20-heat collecting device, 30-pipeline, 40-condenser, 50-fan, 21-radiating fin, 22-heat pipe, 23-collecting box, 31-collecting pipe, 32-return Liquid pipe, 1-shroud, 2-impeller, 3-generator, 4-cabin, 5-tower, 6-hub, 7-main shaft.

detailed description

The pitch cabinet cooling device and the wind power generating set equipped with the cooling device according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

There are many electrical components inside the pitch cabinet, among which the main heating component is an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, referred to as the IGBT module). temperature, causing the wind turbine to shut down. Therefore, the cooling device of the pitch cabinet in the embodiment of the utility model is mainly aimed at cooling the heating part of the pitch cabinet corresponding to the installation position of the IGBT module, so as to ensure that the whole pitch cabinet is in a reasonable temperature range, so that the wind turbine will not The cabinet temperature is too high and shut down, thereby improving the availability of wind turbines, making the wind turbines work more continuously, utilizing more wind energy resources, and improving the economic benefits of the whole machine. At the same time, the pitch cabinet cooling device can keep the electrical components inside the pitch cabinet in a relatively low temperature environment, which is beneficial to improve the stability and service life of the electrical components.

The embodiment of the utility model is mainly based on the in-pipe cooling technology of the evaporative cooling heat transfer method. The local air pressure is used as the working environment of the cooling device, and the cooling medium filled in the cooling device circuit undergoes phase change at different positions of the circuit to complete heat absorption. And release heat, and then realize the cooling of the pitch cabinet. In the embodiment of the present utility model, the cooling medium is a commercially available product, and the most important physical parameters are boiling point and latent heat of vaporization. In this embodiment, the cooling medium is a fluorocarbon compound, such as FF31L. According to the operating characteristics of the wind turbine, combined with the temperature control strategy of the pitch cabinet, the boiling point of the selected cooling medium is 46°C (at normal pressure), and the latent heat of vaporization is 141.8J/kg. In addition, the cooling medium also has the characteristics of high insulation, non-toxic and environmentally friendly, and low viscosity.

Embodiment one

The following first introduces the pitch cabinet cooling device of the embodiment of the utility model. Fig. 1 is a schematic front view of the structure of the pitch cabinet cooling device in this embodiment; Fig. 2 is a right view of Fig. 1 .

As shown in Figure 1, the pitch cabinet cooling device in the embodiment of the utility model mainly includes a heat collecting device 20, a condenser 40, and a pipeline 30 arranged between the heat collecting device 20 and the condenser 40, and the pipeline 30 includes The gas collection pipe 31 and the liquid return pipe 32, and the pipeline 30 form a circuit between the heat collection device 20 and the condenser 40, and the cooling medium is filled in the circuit.

As shown in FIG. 2 , both the gas collecting pipe 31 and the liquid return pipe 32 have a double-pipe structure, and this double-pipe structure can make the cooling medium flow more fully in the circuit, so that the cooling effect is better. In order to enhance the condensation effect, a low-power fan 50 is installed on one side of the condenser 40. In this example, the fan 50 is an axial flow fan.

The IGBT module is arranged at the bottom of the pitch cabinet 10. Therefore, the heating part of the pitch cabinet 10 is the bottom plate of the pitch cabinet 10. In order to better ensure the heat dissipation of the pitch cabinet 10, a There are a plurality of heat dissipation fins 21 , and the heat transmitted from the heat source IGBT module is diffused outward through the heat dissipation fins 21 arranged under the bottom plate of the pitch cabinet 10 . At the same time, in order to improve the intelligence and low energy consumption of the pitch cabinet cooling device in the embodiment of the utility model, a Pt100 temperature sensor is also installed on the surface of the cooling fin 21, and the Pt100 temperature sensor monitors the temperature of the cooling fin 21 in real time, and The monitored temperature signal is transmitted to the control unit of the wind turbine, and then the operation of the cooling device of the pitch cabinet is controlled in real time through the remote monitoring system of the wind turbine.

As shown in Figure 2, in order to better realize heat transfer, the heat collecting device 20 is composed of a plurality of heat pipes 22, and each heat pipe is arranged in the gap of the heat dissipation fins 21, and is closely attached to the heat dissipation fins 21, each The heat pipes 22 are all in communication with the air collection pipe 31 , of course, according to specific design requirements, the heat pipes 22 can also be connected to each other and then communicate with the air collection pipe 31 uniformly. At the same time, in the embodiment of the present utility model, the shape of the heat pipe 22 is not strictly shown, and it can be a tubular body with any shape such as a circle, an ellipse, a square, a triangle, a polygon, etc., as long as it can be realized. Good heat transfer from the cooling fins 21 is sufficient.

The specific working process of the pitch cabinet cooling device in this embodiment is as follows:

The cooling fins 21 transfer the heat generated by the IGBT module to the heat pipe 22. When the temperature in the heat pipe 22 reaches the boiling point temperature of the cooling medium of 50°C, the cooling medium in the heat pipe 22 will vaporize and change from a liquid state to a gaseous state, while absorbing a large amount of The latent heat of vaporization, the gaseous cooling medium flows into the condenser 40 through the collector pipe 31, and the fan 50 performs auxiliary air cooling on the condenser 40. After being cooled, the gaseous cooling medium in the condenser 40 undergoes a phase change and condenses into a liquid again, releasing a large amount of heat at the same time. The condensed liquid cooling medium flows back to the heat pipe 22 of the heat collecting device 20 through the liquid return pipe 32 to complete a cooling cycle.

Embodiment two

As shown in FIG. 3 and FIG. 4 , the difference between this embodiment and the first embodiment lies in that the structure of the heat collecting device 20 is different.

In this example, the heat collecting device 20 is a heat collecting box 23 tightly attached to the heating part of the pitch cabinet 10, and the heat collecting box 23 is a box structure, and of course it can also be in other shapes such as a cylinder, as long as it can be realized The effective heat transfer of the pitch cabinet 10 and the vaporization of the cooling device filled in the pitch cabinet 10 are enough. Through contact with the pitch cabinet 10 , the heat of the pitch cabinet 10 is transferred to the heat collection box 23 . The heat collection box 23 forms a loop with the condenser 40 through a pipeline 30 , wherein the pipeline 30 includes a gas collector 31 and a liquid return pipe 32 . At the same time, a Pt100 temperature sensor is also installed on the contact surface between the pitch cabinet 10 and the heat collector 23, and the Pt100 temperature sensor monitors the temperature of the heating part of the pitch cabinet 10 in real time, and transmits the monitored temperature signal to the wind generator. The control unit of the wind turbine can then control the operation of the cooling device of the pitch cabinet in real time through the remote monitoring system of the wind turbine.

In addition, in order to reduce the energy consumption of the pitch cabinet cooling device, a control signal line is connected between the fan 50 and the wind turbine control unit, and the control unit controls the start, low speed, and high speed operation of the fan 50 through the rotation speed of the wind turbine impeller. state, so that the fan 50 can be better matched with the operating conditions of the wind power generating set, and the overall energy consumption of the system can be reduced.

The specific working process of the pitch cabinet cooling device in this embodiment is as follows:

The surface of the pitch change cabinet 10 transfers the heat generated by the IGBT module to the heat collection box 23. When the temperature in the heat collection box 23 reaches the boiling point temperature of the cooling medium, the cooling medium in the heat collection box 23 will vaporize and change from liquid to The gaseous state absorbs a large amount of latent heat of vaporization at the same time, and the gaseous cooling medium flows into the condenser 40 through the collecting pipe 31 , and the fan 50 performs auxiliary air cooling on the condenser 40 . After being cooled, the gaseous cooling medium in the condenser 40 undergoes a phase change and condenses into a liquid again, releasing a large amount of heat at the same time. The condensed liquid cooling medium flows back into the heat collecting tank 23 again through the liquid return pipe 32 to complete a cooling cycle.

Embodiment three

The following describes the wind power generating set including the cooling device for the above-mentioned pitch cabinet.

Fig. 5 is a schematic diagram of a wind power generating set with a pitch cabinet cooling device disclosed in an embodiment of the present utility model, including a tower 5, and above the tower 5, an engine room 4, a generator 3, an impeller 2 and a shroud are arranged 1. The above structures are all prior art, and will not be repeated here.

As shown in Figure 6, the pitch cabinet 10 is arranged in the narrow space formed by the hub 6 of the impeller 2 and the main shaft 7. In this embodiment, in order to achieve a better cooling effect for the pitch cabinet cooling device, the heat collecting The device 20 is arranged in the heat-generating part of the pitch cabinet 10, the condenser 40 and the fan 50 are arranged in the large space low-temperature area in the shroud 1, and the heat collecting device 20 and the condenser 40 are connected by a pipeline 30 to form a circuit. Fill the circuit with cooling medium.

The advantages of this layout arrangement are: on the one hand, it can overcome the overcrowded structure of the pitch cabinet cooling device due to the narrow installation location, which makes the cooling medium circulation process short and cannot fully cool, thereby affecting the cooling device's effect on the pitch cabinet. on the other hand, the condenser 40 is arranged in the large space low-temperature area in the shroud 1, and the internal heat of the pitch cabinet 10 can be effectively transferred from the small space of the hub 6 at the root of the impeller 2 through the cooling medium. Transfer to the inner space of the air guide cover 1, and at the same time, because the temperature of the inner space of the air guide cover 1 is relatively low, it can also effectively promote the liquefaction of the cooling medium in the condenser. At the same time, combined with the operating characteristics of the wind turbine, the cooling device of the pitch cabinet can promote the self-circulation of the cooling medium liquid and gas inside the cooling device of the pitch cabinet by using the rotation effect of the impeller of the wind turbine, and strengthen the cooling inside the cooling device to a certain extent. Circulation, so that the cooling effect of the system is better.

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 change oar cabinet cooling unit, it is characterized in that: comprise heat-collecting devcie (20) and condenser (40), described heat-collecting devcie (20) is arranged on and becomes oar cabinet (10) heating position, be communicated with by pipeline (30) between described heat-collecting devcie (20) with condenser (40) and form loop, cooling medium is provided with in described loop, described cooling medium absorbs heat vaporization in heat-collecting devcie (20), heat release liquefaction in described condenser (40), described cooling medium moves at described loop Inner eycle.

2. change oar cabinet cooling unit according to claim 1, it is characterized in that: described pipeline (30) comprises gas collecting tube (31) and liquid return pipe (32), and described gas collecting tube (31) and described liquid return pipe (32) are all arranged between described heat-collecting devcie (20) and described condenser (40).

3. change oar cabinet cooling unit according to claim 1, it is characterized in that: the heating position of described change oar cabinet (10) is provided with radiating fin (21), described heat-collecting devcie (20) is arranged in described radiating fin (21) gap for heat pipe (22), described heat pipe (22).

4. change oar cabinet cooling unit according to claim 1, is characterized in that: the heating position of described change oar cabinet is provided with heat collecting tank (23).

5. change oar cabinet cooling unit according to claim 1, is characterized in that: on described change oar cabinet (10), be provided with temperature transducer, temperature signal is sent to wind-driven generator control unit by described temperature transducer.

6. change oar cabinet cooling unit according to claim 5, it is characterized in that: the heating position of described change oar cabinet (10) is provided with radiating fin (21), and described temperature transducer is arranged on described radiating fin (21).

7. change oar cabinet cooling unit according to claim 1, is characterized in that: described condenser (40) is arranged in wind generator set air guide sleeve (1).

8. change oar cabinet cooling unit according to claim 7, is characterized in that: on described condenser (40), be also provided with fan (50).

9. change oar cabinet cooling unit according to claim 8, is characterized in that: described fan (50) is controlled by wind-driven generator control unit.

10. a wind power generating set, is characterized in that: comprise the change oar cabinet cooling unit described in claim 1-9 any one.