CN209267372U - Cooling units, winding assemblies, generators and wind turbines - Google Patents

Abstract

This application provides a cooling device, a winding assembly, a generator and a wind turbine generator set. The cooling device is used to be installed on an iron core provided with windings, and includes a condenser and a plurality of cooling tubes. The condenser and cooling tube contain cooling working fluid, and the inlet end and outlet end of the condenser are connected to the two ends of the cooling tube respectively. A plurality of cooling tubes are respectively arranged in a plurality of winding slots of the iron core along the axial direction of the iron core, and are fitted with the windings in the winding slots. The cooling tube is arranged in the winding slot and can fit closely with the winding without significantly increasing the size of the core itself, ensuring the compactness of the motor structure. The cooling device provided by the embodiment of the present application uses evaporative cooling of the cooling working fluid to dissipate heat, thereby improving the safety and environmental protection of the motor. When designing the shape of the cooling tube, sudden bends can be avoided, thereby ensuring the smooth flow of the cooling medium in the cooling tube, avoiding local head loss, and ensuring the safety and reliability of the motor's heat dissipation.

Description

Cooling units, winding assemblies, generators and wind turbines

technical field

The present application relates to the technical field of motor heat dissipation, and in particular to a cooling device, a winding assembly, a generator and a wind power generating set.

Background technique

Most of the loss generated by the motor during operation will be converted into heat, which will increase the temperature of the generator. If the heat cannot be effectively and continuously conducted and dissipated out of the motor, the temperature of the motor will exceed the maximum allowable operating temperature, resulting in the use of the motor The service life will be shortened rapidly, and the motor will be burned out in severe cases. In order to ensure that the motor can work safely, the motor must be cooled in time.

The existing motor cooling methods mainly include air cooling, liquid cooling and evaporative cooling. However, the motors using the above cooling methods still have the following disadvantages:

1. For air-cooled motors, impurities such as dust and salt mist in the outside air will enter the motor and easily damage the generator. Moreover, in order to improve the cooling effect, it is necessary to increase the air supply volume and increase the ventilation duct, which is not conducive to the optimization of the low power consumption and compact design direction of the motor.

2. For liquid-cooled motors, when the cooling liquid is water, since the water is not insulated, once it leaks, it will cause a short circuit of the motor, and the antifreeze in the water is easy to corrode the motor; when the cooling liquid is oil, once it leaks, it will cause environmental damage. Pollution.

3. Evaporative cooling is divided into immersion cooling and pipeline internal cooling. For motors using immersion cooling, since the stator or rotor needs to be fully or partially immersed in the cooling medium, the demand for cooling medium is large, resulting in increased costs , poor economy.

For motors that use pipe internal cooling, the windings need to use hollow wires. When the motor is working, the heat generated by the windings is directly taken away by the evaporative cooling fluid flowing in the hollow cooling channel of the hollow wires in time. However, the winding is formed by twisting and twisting the wires, so that the hollow wires are in a crimped state, and there are abrupt bends, which leads to the flow of the cooling medium in the hollow conduit is not smooth, and the flow rate of the cooling medium around the hollow wires is not smooth. Uniformity, when the cooling fluid flows through the sudden bend, a vortex will be formed, causing local water head loss, which will eventually lead to uneven heat dissipation of the motor, local high temperature, and a potential safety hazard.

To sum up, the generators using the existing cooling methods have defects such as uncompact structure and poor safety and reliability.

Utility model content

Aiming at the shortcomings of the prior art, the present application proposes a cooling device, a winding assembly, a generator, and a wind power generator set to solve the problems of uncompact structure or poor safety and reliability of generators using existing cooling methods.

In a first aspect, the present application provides a cooling device for being installed on an iron core provided with windings, comprising: a condenser and a plurality of cooling pipes; the condenser and the cooling pipes contain cooling working fluid, and the inlet of the condenser The end and the outlet end communicate with the two ends of the cooling pipe respectively; the plurality of cooling pipes are respectively arranged in a plurality of winding slots of the iron core along the axial direction of the iron core, and bonded to the windings in the winding slots.

In the second aspect, the embodiment of the present application provides a winding assembly, including an iron core, a plurality of windings, and a cooling device provided in the first aspect of the embodiment of the application; In the winding slots, a plurality of cooling pipes are arranged axially in the plurality of winding slots of the iron core respectively, and are bonded to the windings in the winding slots.

In a third aspect, the embodiment of the present application provides a generator, including the winding assembly provided in the second aspect of the embodiment of the present application.

In a fourth aspect, the embodiment of the present application provides a wind power generating set, including the generator provided in the third aspect of the embodiment of the present application.

Compared with the prior art, the present application has the following beneficial technical effects:

In the cooling device provided in the embodiment of the present application, the cooling pipe is arranged in the winding slot to fit the winding without significantly increasing the size of the iron core itself, which ensures the compactness of the motor structure.

In addition, the liquid cooling medium in the cooling pipe absorbs the heat of the winding and becomes a vapor state and flows back to the condenser. After the condenser absorbs the heat of the vapor cooling medium, the vapor cooling medium is converted into a liquid cooling medium. The substance flows into the cooling tube again. The above-mentioned process is carried out in a cycle, and the heat of the motor is taken away to realize heat dissipation of the motor. Compared with the heat dissipation methods of air cooling and liquid cooling, the cooling device provided in the embodiment of the present application utilizes the evaporative cooling of the cooling medium to dissipate heat, which improves the safety and environmental protection of the motor.

Moreover, since the cooling pipe is arranged outside the winding and is two independent parts from the winding, the shape of the cooling pipe is not completely limited by the shape of the winding, and abrupt bends can be avoided when designing the shape of the cooling pipe. On the one hand, it can ensure The smooth flow of the cooling medium in the cooling pipe ensures that the flow of the cooling medium in the cooling pipe is uniform. On the other hand, it can prevent the cooling medium from forming a vortex in the cooling pipe, thereby avoiding local head loss and ensuring the heat dissipation of the motor. Safety and reliability.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic structural diagram of a winding assembly provided by an embodiment of the present application;

Fig. 2 is a schematic structural diagram of the first type of cooling pipe provided by the embodiment of the present application;

Fig. 3 is the left view of Fig. 2 provided by the embodiment of the present application;

Fig. 4 is a schematic structural diagram of the second type of cooling pipe provided by the embodiment of the present application;

Fig. 5 is a left view of Fig. 4 provided by the embodiment of the present application;

Fig. 6 is a schematic diagram of the assembly of the iron core and the winding provided by the embodiment of the present application;

Fig. 7 is a part of the sectional view along the A direction of Fig. 6 provided by the embodiment of the present application;

Fig. 8 is a part of the B-direction sectional view of Fig. 7 provided by the embodiment of the present application, and shows the positional relationship of the iron core, windings and cooling pipes;

Fig. 9 is a partial enlarged view at C of Fig. 8;

In the picture:

1-condenser; 2-cooling pipe; 21-first type cooling pipe; 22-second type cooling pipe;

3-the first annular pipe; 4-the second annular pipe; 5-joint; 6-the first conduit; 7-the second conduit;

100-winding; 200-iron core; 201-winding slot; 300-temperature sensor.

Detailed ways

The present invention is described in detail below, and examples of embodiments of the present invention are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. Furthermore, detailed descriptions of known techniques are omitted if they are not necessary to illustrate the features of the invention. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have meanings consistent with their meaning in the context of the prior art, and unless specifically defined as herein, are not intended to be idealized or overly Formal meaning to explain.

It should be noted that the cooling device provided in this application is installed on the motor, and the iron core 200 of the motor is generally cylindrical. The radial, axial and circumferential directions mentioned in the text are based on the iron core 200 of the motor as a reference standard.

The present application provides a cooling device for installation on an iron core 200 provided with a winding 100 , as shown in FIGS. 1 to 8 , comprising: a condenser 1 and a plurality of cooling pipes 2 . The condenser 1 and the cooling pipe 2 contain cooling working fluid, and the inlet and outlet ends of the condenser 1 communicate with the two ends of the cooling pipe 2 respectively. The plurality of cooling pipes 2 are respectively arranged in the plurality of winding slots 201 of the iron core 200 along the axial direction of the iron core, and are attached to the windings 100 in the winding slots 201 .

It should be noted that the winding slot 201 may be a through slot formed by tooth slots of multiple stacked punched pieces in the iron core 200 , and the winding slot 201 on the iron core 200 is used for installing the winding 100 . The cooling pipe 2 is arranged in the winding groove 201 and can be attached to the winding 100 without significantly increasing the size of the iron core 200 itself, which ensures the compactness of the motor structure.

The liquid cooling medium in the cooling pipe 2 absorbs the heat of the winding 100 and then turns into a vapor state and flows back to the condenser 1. After the condenser 1 absorbs the heat of the vapor state cooling medium, the vapor state cooling medium is converted into a liquid state The cooling medium flows into the cooling pipe 2 again. The above-mentioned process is carried out in a cycle, and the heat of the motor is taken away to realize heat dissipation of the motor. Compared with the heat dissipation methods of air cooling and liquid cooling, the cooling device provided in the embodiment of the present application utilizes the evaporative cooling of the cooling medium to dissipate heat, which improves the safety and environmental protection of the motor.

Since the cooling pipe 2 is arranged outside the winding 100 and is two independent parts with the winding 100, the shape of the cooling pipe 2 is not completely limited by the shape of the winding 100, and the abrupt bend can be avoided when designing the shape of the cooling pipe 2. On the one hand, it can ensure the smooth flow of the cooling medium in the cooling pipe 2, and ensure that the flow rate of the cooling medium in the cooling pipe 2 is uniform; on the other hand, it can prevent the cooling medium from forming a vortex in the cooling pipe 2, thereby avoiding Partial head loss occurs to ensure the safety and reliability of the heat dissipation of the motor. Those skilled in the art can understand that head loss refers to the loss of mechanical energy per unit mass of liquid during the movement of water flow.

It should be noted that FIG. 6 is an assembly projection view of the winding 100 and the iron core 200 perpendicular to the axial direction of the iron core 200, and only shows a part of the iron core 200 and the winding 100; it is not shown in FIGS. 6 and 7 The cooling device provided in the embodiment of the present application.

Optionally, in the cooling device provided in the present application, the axial dimension of the cooling pipe 2 is equal to the axial linear portion of the winding 100 .

Taking FIG. 2 or FIG. 4 as an example, the axial dimension of the cooling pipe 2 may be the dimension a in FIG. 2 or FIG. 4 . When the axial dimension of the cooling pipe 2 is equal to the dimension of the axial linear portion of the winding 100, on the one hand, the two axial ends of the cooling pipe 2 can be aligned with the two boundaries of the axial linear portion of the winding 100 respectively , increase the contact area between the cooling pipe 2 and the winding 100 as much as possible, and improve the heat dissipation efficiency. On the other hand, the cooling pipe 2 can be designed as a long straight pipe, and it only needs to be attached to the axial linear part of the winding 100 in the axial direction, and does not need to be attached to the curved part of the winding 100, so as to avoid sudden bends in the cooling pipe 2 .

Optionally, in the cooling device provided in the present application, the plurality of cooling pipes 2 include a first-type cooling pipe 21 , and the radial dimension of the first-type cooling pipe 21 is equal to the radial dimension of the winding 100 .

Taking FIG. 2 as an example, the radial dimension of the first type of cooling pipe 21 may be the dimension c in FIG. 2 . When the radial dimension of the first type cooling pipe 21 is equal to the radial dimension of the winding 100, as shown in FIG. The two radially opposite edges are aligned to increase the contact area between the cooling pipe 2 and the winding 100 as much as possible, and improve the heat dissipation efficiency.

Optionally, in the cooling device provided by the present application, the plurality of cooling pipes 2 include the second type of cooling pipe 22 , and for the two-layer windings 100 arranged at intervals in the radial direction in the same winding slot 201 , the second type The radial dimension of the cooling pipe 22 is equal to the radial dimension of the radial gap between the two layers of windings 100 .

Taking FIG. 4 as an example, the radial dimension of the second type of cooling pipe 22 may be the dimension d in FIG. 4 . As shown in Figures 8 and 9, when the radial dimension of the second type of cooling pipe 22 is equal to the radial dimension of the radial gap between the two layers of windings 100, the second type of cooling pipe 22 can be arranged in the same winding In the radial gap between the two-layer windings 100 in the groove 201, and the two radial ends of the second-type cooling pipes 22 are respectively attached to the radially opposite bottom surfaces of the two-layer windings 100, the second-type The contact between the cooling pipe 22 and the winding 100 can improve the heat transfer effect and improve the heat dissipation efficiency.

Optionally, the cooling device provided in the present application further includes a first annular pipe 3 and a second annular pipe 4 . The inlet end of the condenser 1 communicates with one end of the cooling pipe 2 through the first annular pipe 3 , and the outlet end of the condenser 1 communicates with the other end of the cooling pipe 2 through the second annular pipe 4 .

The liquid cooling medium in each cooling pipe 2 absorbs the heat of the winding 100 and becomes a vapor state and collects in the first annular pipe 3, and flows back to the condenser 1 through the first annular pipe 3; the condenser 1 absorbs the vapor state After cooling the heat of the working medium, the cooling working medium in vapor state is converted into liquid cooling working medium and flows into each cooling pipe 2 through the second annular pipe 4 .

Optionally, in the cooling device provided in the present application, the inlet end and the outlet end of the condenser 1 are respectively connected to the tops of the first annular pipe 3 and the second annular pipe 4 .

Taking FIG. 1 as an example, the inlet end of the condenser 1 is connected to the top of the first annular pipe 3 through the first conduit 6 , and the outlet end of the condenser 1 is connected to the top of the second annular pipe 4 through the second conduit 7 . Both ends of each cooling pipe 2 are respectively connected to the first annular pipe 3 and the second annular pipe 4 through joints 5 . When the cooling device is installed on the iron core 200, the condenser 1 is located above the iron core 200, so the inlet end and the outlet end of the condenser 1 are respectively connected to the tops of the first annular pipe 3 and the second annular pipe 4, cooling After the liquid cooling medium in the tube 2 absorbs heat and turns into a vapor cooling medium, the density decreases and it is easy to expand and rise. The vapor cooling medium can naturally converge to the top of the first annular tube 3 and return through the first conduit 6. to the condenser 1; after the gaseous cooling working medium in the condenser 1 releases heat and becomes a liquid cooling working medium, it can flow through the second conduit 7 to the top of the second annular pipe 4 under the action of its own gravity, and then from the second The top of the annular pipe 4 naturally flows into each cooling pipe 2 along the second annular pipe 4 . Therefore, the cooling device provided by the embodiment of the present application does not need additional power devices such as a circulation pump to drive the flow of cooling working fluid, which significantly reduces the cost.

In addition, the vaporization amount of the liquid cooling medium is positively correlated with the temperature of the motor, that is, the higher the temperature of the motor, the greater the vaporization amount of the liquid cooling working medium (that is, there are more cooling working fluids per unit volume or mass of the liquid cooling medium). mass into a vapor state). When the temperature of the motor rises, the vaporization amount of the liquid cooling medium increases, and the vaporization amount of the gaseous cooling medium in the cooling pipe 2 increases accordingly, and more heat can be taken away per unit time. The above process can automatically adjust the temperature of the motor so that the temperature of the motor is approximately constant. Therefore, the cooling device provided by the embodiment of the present application does not need additional pressure regulation or flow regulation device, which further reduces the cost.

It should be noted that the first conduit 6 , the second conduit 7 , the first annular pipe 3 , the second annular pipe 4 , the joint 5 and the cooling pipe 2 should all be insulated. Taking the cooling pipe 2 as an example, the cooling pipe 2 may be made of insulating material, or may be a metal pipe whose outer surface is covered with a layer of insulating material.

Based on the same inventive concept, the embodiment of the present application also provides a winding assembly, as shown in FIG. 1 to FIG. 8 , including an iron core 200, a plurality of windings 100, and a cooling device provided in the embodiment of the present application. The multiple windings 100 are respectively arranged in the multiple winding slots 201 of the iron core 200 . A plurality of cooling pipes 2 are arranged axially in the plurality of winding slots 201 of the iron core 200 , and are attached to the windings 100 in the winding slots 201 .

It should be noted that the axial straight portion of the winding 100 may refer to the portion of the winding 100 disposed in the winding slot 201 .

Those skilled in the art can understand that an annular winding 100 is arranged in two winding slots 201, that is to say, for an annular winding 100, a part is arranged in one winding slot 201 and a part is arranged in the other winding slot 201. Inside. Only one winding 100 can be arranged in the same winding slot 201 , or two or more windings 100 can be arranged. Taking FIG. 8 as an example, two layers of windings 100 can be arranged in the same winding slot 201 along the radial direction. When the winding 100 is arranged in the winding slot 201, there is a gap between the winding 100 and the side wall of the winding slot 201, or there is a gap between the upper and lower adjacent windings 100 in the same winding slot 201, and the cooling pipe 2 can be arranged in the In the above gap, it can be seen that in the winding assembly provided by the embodiment of the present application, the cooling pipe 2 makes full use of the original space in the winding assembly, and does not significantly increase the size of the iron core 200 itself, which ensures the compactness of the winding assembly structure .

A plurality of cooling pipes 2 are arranged axially in the plurality of winding slots 201 of the iron core 200, and are attached to the windings 100 in the winding slots 201. The liquid cooling medium in the cooling pipes 2 absorbs the heat of the windings 100 and becomes Dissipate heat for the generator in the vapor state. It should be noted that the number of cooling pipes 2 in the same winding slot 201 can be determined according to actual needs, and only one cooling pipe 2 or multiple cooling pipes 2 can be provided. Certainly, the cooling pipe 2 can fill up the gap space as much as possible to increase the flow rate of the cooling working medium in the cooling pipe 2 and increase the contact area between the cooling pipe 2 and the winding 100 , thereby increasing the heat dissipation efficiency.

Optionally, in the winding assembly provided in the embodiment of the present application, the two axial ends of the cooling pipe 2 are respectively aligned with the two boundaries of the axial straight line part of the winding 100, which greatly increases the 2 and the contact area of the winding 100 increases the flow rate of the cooling working medium in the cooling pipe 2 and improves the heat dissipation efficiency. Moreover, the cooling pipe 2 can be designed as a long straight pipe, and it only needs to be attached to the axial straight part of the winding 100 in the axial direction, and does not need to be attached to the curved part of the winding 100, so as to avoid sudden bends in the cooling pipe 2 .

Optionally, in the winding assembly provided in the embodiment of the present application, the plurality of cooling pipes 2 include first-type cooling pipes 21 , and the first-type cooling pipes 21 are bonded to the circumferential side of the winding 100 . Optionally, the two radial ends of the first-type cooling pipe 21 are respectively aligned with the two radially opposite edges of the circumferential side of the winding 100, which greatly increases the cooling capacity of the cooling pipe 2 and the winding 100. The contact area increases the flow rate of the cooling working medium in the cooling pipe 2 and improves the heat dissipation efficiency.

Taking Fig. 2 , Fig. 3 and Fig. 8 as an example, the cross section perpendicular to the axial direction of the part of the winding 100 in the winding slot 201 is a rectangle, and the cross section perpendicular to the axial direction of the first type cooling pipe 21 is a rectangular frame. For example, as shown in FIG. 2 , the axial dimension a of the first type of cooling pipe 21 is equal to the dimension a of the axial straight portion of the winding 100 . As shown in FIG. 2 , the radial dimension c of the first type of cooling pipe 21 is equal to the radial length of the axial straight portion of the winding 100 . That is to say, one side of the first-type cooling pipe 21 completely coincides with one side of the straight portion of the winding 100 . As shown in FIG. 3 , a first-type cooling pipe 21 can be arranged on both sides of a winding 100 respectively, and the circumferential dimension k of the first-type cooling pipe 21 is less than or equal to the circumference between the winding 100 and the side wall of the winding slot 201. to the width of the gap. In FIG. 3 , m refers to the wall thickness of the first type cooling pipe 21 .

Optionally, in the winding assembly provided in the embodiment of the present application, two layers of windings 100 are arranged at intervals in the winding slot 201 along the radial direction. The plurality of cooling pipes 2 include a second type of cooling pipe 22, the second type of cooling pipe 22 is arranged in the radial gap between the two layers of windings 100 in the same winding slot 201, and the radial direction of the second type of cooling pipe 22 The two ends are attached to the radially opposite bottom surfaces of the two-layer winding 100 respectively. The contact between the second type cooling pipe 22 and the winding 100 can improve the heat transfer effect and improve the heat dissipation efficiency. Taking Fig. 4 and Fig. 8 as an example, the radial dimension d of the second-type cooling pipe 22 is equal to the width of the radial gap between the two-layer windings 100 in the same winding slot 201, so that the second-type cooling pipe 22 has a diameter of The two opposite bottom surfaces are attached to the bottom surfaces of the two windings 100 respectively.

Optionally, in the winding assembly provided in the embodiment of the present application, a temperature sensor 300 is provided in the radial gap between the two layers of windings 100 in the same winding slot 201 . The circumferential dimension of the second-type cooling pipe 22 is smaller than the minimum distance between the temperature sensor 300 and the winding 100 along the circumferential direction, and both circumferential ends of the second-type cooling pipe 22 are within the radial gap.

Taking Fig. 4 , Fig. 5 , Fig. 8 and Fig. 9 as examples, the section perpendicular to the axial direction of the second type of cooling pipe 22 is a rectangular frame. For example, as shown in Figure 4, the axial dimension a of the second type of cooling pipe 22 is equal to the dimension of the axial straight line part of the winding 100, as shown in Figure 4, the radial dimension d of the second type of cooling pipe 22 is the same as The width of the radial gap between the two layers of windings 100 in one winding slot 201 is equal. As shown in FIG. 5 , the circumferential dimension e of the second-type cooling pipe 22 is smaller than the minimum circumferential distance between the temperature sensor 300 and the winding 100 , that is, the circumferential side of the second-type cooling pipe 22 does not exceed the winding 100 The corresponding circumferential side of . In FIG. 5 , m refers to the wall thickness of the first type cooling pipe 21 .

Optionally, in the winding assembly provided in the embodiment of the present application, the condenser 1 is arranged above the iron core 200 . In the winding assembly provided by the embodiment of the present application, the position of the condenser 1 is higher than that of the iron core 200. Since the cooling pipe 2 is arranged in the plurality of winding slots 201 of the iron core 200, the position of the condenser 1 is higher than that of each The position of the cooling pipe 2, the inlet end and the outlet end of the condenser 1 can be respectively connected to the top of the first annular pipe 3 and the second annular pipe 4, and the vapor cooling working medium in the cooling pipe 2 can naturally return upward to the condensing In the condenser 1, the liquid cooling working fluid in the condenser 1 can naturally flow downward into the cooling pipe 2.

Optionally, in the winding assembly provided in the embodiment of the present application, the first annular tube 3 and the second annular tube 4 are respectively arranged at two axial ends of the iron core 200 .

The shapes of the first annular tube 3 and the second annular tube 4 are adapted to the shape of the end of the iron core 200 to avoid occupying too much space and ensure the compactness of the winding assembly structure.

Based on the same inventive concept, an embodiment of the present application further provides a generator, including the winding assembly provided in the embodiment of the present application.

Based on the same inventive concept, an embodiment of the present application further provides a wind power generating set, including the generator provided in the embodiment of the present application.

By applying the embodiments of the present application, at least the following technical effects can be achieved:

In the cooling device provided in the embodiment of the present application, the cooling pipe is arranged in the winding slot to fit the winding without significantly increasing the size of the iron core itself, which ensures the compactness of the motor structure.

In addition, the liquid cooling medium in the cooling pipe absorbs the heat of the winding and becomes a vapor state and flows back to the condenser. After the condenser absorbs the heat of the vapor cooling medium, the vapor cooling medium is converted into a liquid cooling medium. The substance flows into the cooling tube again. The above-mentioned process is carried out in a cycle, and the heat of the motor is taken away to realize heat dissipation of the motor. Compared with the heat dissipation methods of air cooling and liquid cooling, the cooling device provided in the embodiment of the present application utilizes the evaporative cooling of the cooling medium to dissipate heat, which improves the safety and environmental protection of the motor.

Moreover, since the cooling pipe is arranged outside the winding and is two independent parts from the winding, the shape of the cooling pipe is not completely limited by the shape of the winding, and abrupt bends can be avoided when designing the shape of the cooling pipe. On the one hand, it can ensure The smooth flow of the cooling medium in the cooling pipe ensures that the flow of the cooling medium in the cooling pipe is uniform. On the other hand, it can prevent the cooling medium from forming a vortex in the cooling pipe, thereby avoiding local head loss and ensuring the heat dissipation of the motor. Safety and reliability.

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in an appropriate manner. The above descriptions are only part of the embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principles of the present invention. It should be regarded as the protection scope of the present invention.

Claims (11)

1. A cooling device for being installed on an iron core provided with windings, characterized in that it comprises: a condenser and a plurality of cooling pipes; The condenser and the cooling pipe contain cooling working fluid; the inlet and outlet ends of the condenser are respectively connected to the two ends of the cooling pipe; a plurality of the cooling pipes are respectively used for The core is axially arranged in a plurality of winding slots of the iron core, and is attached to the windings in the winding slots. 2. The cooling device according to claim 1, wherein the axial dimension of the cooling pipe is equal to the axial linear portion of the winding; And/or, the plurality of cooling pipes include a first-type cooling pipe, and the radial dimension of the first-type cooling pipe is equal to the radial dimension of the winding; And/or, the plurality of cooling pipes include second-type cooling pipes, and for the two-layer windings arranged at intervals in the same winding slot in the radial direction, the radial direction of the second-type cooling pipes The size is equal to the radial size of the radial gap between the two layers of windings. 3. The cooling device according to claim 1, further comprising a first annular pipe and a second annular pipe; The inlet end of the condenser communicates with one end of the cooling pipe through the first annular pipe; the outlet end of the condenser communicates with the other end of the cooling pipe through the second annular pipe ; And/or, the inlet end and the outlet end of the condenser are respectively connected to tops of the first annular pipe and the second annular pipe. 4. A winding assembly, characterized in that it includes an iron core, a plurality of windings, and the cooling device according to any one of claims 1-3; the plurality of windings are respectively arranged on a plurality of windings of the iron core In the winding slot; A plurality of cooling pipes are arranged axially in the plurality of winding slots of the iron core respectively, and are attached to the windings in the winding slots. 5 . The winding assembly according to claim 4 , wherein the two axial ends of the cooling pipe are respectively aligned with the two boundaries of the axial straight portion of the winding. 6 . 6. The winding assembly according to claim 4, wherein the plurality of cooling pipes include a first-type cooling pipe, and the first-type cooling pipe is attached to the circumferential side of the winding; And/or, the two radial ends of the first type of cooling pipe are respectively aligned with the two radially opposite edges of the circumferential side of the winding. 7. The winding assembly according to claim 4, characterized in that, two layers of windings are arranged in the winding slot at intervals along the radial direction; The plurality of cooling pipes include a second type of cooling pipe, and the second type of cooling pipe is arranged in the radial gap between the two layers of windings in the same winding slot; and the second type of cooling pipe The two radial ends of the cooling pipe are attached to the radially opposite bottom surfaces of the two layers of windings respectively. 8. The winding assembly according to claim 7, wherein a temperature sensor is arranged in the radial gap between the two layers of windings in the same winding slot; The circumferential dimension of the second-type cooling pipe is smaller than the minimum distance between the temperature sensor and the winding along the circumferential direction, and both circumferential ends of the second-type cooling pipe are within the diameter into the gap. 9. The winding assembly according to claim 4, wherein the condenser is arranged above the iron core; And/or, the first annular tube and the second annular tube are respectively arranged at two axial ends of the iron core. 10. A generator, characterized by comprising the winding assembly according to any one of claims 4-9. 11. A wind power generating set, comprising the generator according to claim 10.