WO2021042848A1 - Wind turbine closed cooling structure - Google Patents

Wind turbine closed cooling structure Download PDF

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Publication number
WO2021042848A1
WO2021042848A1 PCT/CN2020/099367 CN2020099367W WO2021042848A1 WO 2021042848 A1 WO2021042848 A1 WO 2021042848A1 CN 2020099367 W CN2020099367 W CN 2020099367W WO 2021042848 A1 WO2021042848 A1 WO 2021042848A1
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Prior art keywords
air
duct
outlet
inlet
cooling structure
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PCT/CN2020/099367
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French (fr)
Chinese (zh)
Inventor
张晋军
俞文斌
王文庆
尤佰朋
次元平
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西安中车永电捷力风能有限公司
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Priority to CN201910829415.2A priority Critical patent/CN110729852B/en
Priority to CN201910829415.2 priority
Application filed by 西安中车永电捷力风能有限公司 filed Critical 西安中车永电捷力风能有限公司
Publication of WO2021042848A1 publication Critical patent/WO2021042848A1/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/02Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/28Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/19Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

The present invention belongs to the field of wind turbines, and relates to a wind turbine closed cooling structure, comprising in sequence, from left to right, an inlet air collection channel, a machine base, an outlet air collection channel and a fan; the inlet air collection channel is positioned on a transmission direction, and the inlet air collection channel is connected to the machine base; the outlet air collection channel is positioned on a non-transmission direction, and the outlet air collection channel is connected to the machine base; an inlet air channel is disposed between the inlet air collection channel and the outlet air collection channel, one end of the inlet air channel being in communication with the inlet air collection channel, and another end of the inlet air channel being in communication with the fan; the present structure is characterized by a low-air resistance structure of a rotor part, and air inlet and outlet openings being as uniformly arranged as possible; the present air passage structure can prevent oil vapor in a nacelle from entering a motor; the low-air resistance rotor structure can effectively cool a bearing, and can also lower the power for a forced cooling drive motor and increase the cooling capacity of a cooler; the uniform air inlet and outlet structures can ensure a more uniform temperature for the motor, lowering winding heating and increasing motor power.

Description

一种风力发电机闭式冷却结构Closed cooling structure of wind power generator 技术领域Technical field
本发明属于风力发电机领域,尤其涉及一种风力发电机闭式冷却结构。The invention belongs to the field of wind power generators, and particularly relates to a closed cooling structure of a wind power generator.
背景技术Background technique
风力发电作为一种清洁可再生能源,由于其良好的环境和经济效益,越来越受到世界各国的重视。在众多的风力发电机机型中,紧凑型永磁风力发电机因其重量轻、体积小、成本低、效率高、维护量小的特点成为新一代风力发电机的代表。As a kind of clean and renewable energy, wind power has attracted more and more attention from countries all over the world due to its good environment and economic benefits. Among the many wind turbine models, compact permanent magnet wind turbines have become a representative of a new generation of wind turbines due to their light weight, small size, low cost, high efficiency, and low maintenance.
现有永磁风力发电机结构包括转子通风结构,转子通风结构通常是轴向流经转子之间的气隙和转子磁极之间的空隙,由于定转子之间的气隙以及转子磁极之间的空隙较小,导致电机的风阻较大,所需冷却电机的功率也较大,冷却器的体积也较大;另外,由于转子通风结构的进出风通常为与风机或冷却器对应的一个或者两个通风口,导致电机圆周温度不均匀,温差较大,最高温升偏高,冷却能力没有充分利用。The existing permanent magnet wind turbine structure includes a rotor ventilation structure. The rotor ventilation structure usually flows axially through the air gap between the rotor and the gap between the rotor poles. Due to the air gap between the stator and rotor and the gap between the rotor poles The small air gap results in a large wind resistance of the motor, and the power required to cool the motor is also large, and the volume of the cooler is also large; in addition, the inlet and outlet air of the rotor ventilation structure is usually one or two corresponding to the fan or the cooler. Two vents lead to uneven temperature around the motor, large temperature difference, high maximum temperature rise, and insufficient cooling capacity.
发明内容Summary of the invention
本发明的目的在于提供一种风力发电机闭式冷却结构,解决现有永磁风力发电机的转子通风结构,由于其进出风通常为与风机或冷却器对应的一个或两个通风口导致的电机圆周温度不均匀,温差较大,最高温升偏高,冷却能力没有充分利用的问题。The purpose of the present invention is to provide a closed cooling structure for a wind power generator, which solves the problem of the rotor ventilation structure of the existing permanent magnet wind power generator, because the inlet and outlet air is usually caused by one or two vents corresponding to the fan or cooler. The circumferential temperature of the motor is uneven, the temperature difference is large, the maximum temperature rises too high, and the cooling capacity is not fully utilized.
本发明的目的是通过以下技术方案来实现的:The purpose of the present invention is achieved through the following technical solutions:
一种风力发电机闭式冷却结构,自左至右依次包括进风集风道、机座、出风集风道以及风机;A closed cooling structure of a wind power generator, which includes an inlet air collecting duct, a base, an outlet air collecting duct and a fan from left to right;
所述机座上设置有传动方向和非传动方向;The base is provided with a transmission direction and a non-transmission direction;
所述进风集风道位于传动方向上,所述进风集风道与机座连接;The air inlet and air collecting duct is located in the transmission direction, and the air inlet and air collecting duct is connected with the machine base;
所述出风集风道位于非传动方向上,所述出风集风道与机座连接;The outlet air collecting duct is located in the non-transmission direction, and the outlet air collecting duct is connected to the machine base;
所述进风集风道与出风集风道之间设置有进风风道,所述进风风道的一端与进风集风道连通,所述进风风道的另一端与风机连通;An air inlet air duct is arranged between the air inlet air collecting duct and the air outlet air collecting duct, one end of the air inlet air duct is connected with the air inlet air collecting duct, and the other end of the air inlet air duct is connected with the fan ;
所述风机与出风集风道连通。The fan is connected with the outlet air collecting duct.
进一步:所述进风风道和风机至少设置一组。Further: at least one set of the air inlet duct and the fan are provided.
进一步:所述进风集风道和出风集风道分别设置为半圆形。Further: the inlet air collecting duct and the outlet air collecting duct are respectively set in a semicircular shape.
进一步:所述机座的传动方向设置有若干进风口,所述若干进风口在机座上呈圆周间隔分布;Further: a plurality of air inlets are provided in the transmission direction of the machine base, and the plurality of air inlets are distributed at a circumferential interval on the machine base;
所述机座的非传动方向设置有若干出风口,所述若干出风口在机座上呈圆周间隔分布。A plurality of air outlets are provided in the non-transmission direction of the machine base, and the plurality of air outlets are distributed at a circumferential interval on the machine base.
进一步:所述若干进风口距离进风风道由近到远的面积逐渐增大;Further: the area of the plurality of air inlets from near to far away from the air inlet duct gradually increases;
所述若干出风口距离进风风道由近到远的面积逐渐增大。The areas of the plurality of air outlets from near to far from the air inlet duct gradually increase.
进一步:所述机座内设置有转子支架,所述转子支架上设置有若干轴向通风孔,所述若干轴向通风孔自左到右贯穿整个转子支架。Further: a rotor support is arranged in the machine base, and a plurality of axial ventilation holes are arranged on the rotor support, and the plurality of axial ventilation holes penetrate the entire rotor support from left to right.
进一步:所述若干轴向通风孔均分间隔分布在转子支架的侧壁上。Further: the plurality of axial ventilation holes are equally spaced and distributed on the side wall of the rotor support.
进一步:所述转子支架上设置有支撑板,所述支撑板为转子支架上的圆周分布的加强筋。Further: a support plate is provided on the rotor support, and the support plate is a circumferential reinforcing rib on the rotor support.
进一步:所述风机与出风集风道之间设置有冷却器,所述冷却器中设置有冷却水管,所述冷却水管呈非直线形。Further: a cooler is arranged between the fan and the outlet air collecting duct, and a cooling water pipe is arranged in the cooler, and the cooling water pipe is non-linear.
进一步:所述冷却水管呈螺旋形。Further: the cooling water pipe has a spiral shape.
本发明相对于现有技术的有益效果是:The beneficial effects of the present invention over the prior art are:
冷却风机为离心式风机,由其提供动力,将发电机内部的热风从机座非传动方向,经过出风集风道、出风口,吸入冷却风机。同时,冷却风机中通入冷却液,将热风冷却。冷却风机再将冷空气经进风风道、进风集风道,吹入发电机内部。The cooling fan is a centrifugal fan, which provides power to draw the hot air inside the generator from the non-transmission direction of the machine base, through the air outlet duct and air outlet, into the cooling fan. At the same time, coolant is introduced into the cooling fan to cool the hot air. The cooling fan then blows the cold air into the generator through the air inlet duct and the air inlet duct.
冷风经过发电机机座传动方向的绕组端部、定转子之间的气隙、机 座非传动方向的绕组端部,再进入出风集风道,形成一个循环,带走了绕组、定子铁心的热量。同时另一路,冷风经过发电机机座传动方向轴承、转子支架的轴向通风孔、机座非传动方向轴承,再进入出风集风道,形成一个循环,带走了轴承的热量。The cold wind passes through the winding end of the generator frame in the transmission direction, the air gap between the stator and rotor, and the winding end of the frame in the non-transmission direction, and then enters the air outlet duct, forming a cycle, taking away the winding and the stator core. The heat. At the same time, the cold air passes through the transmission direction bearing of the generator base, the axial ventilation hole of the rotor support, and the non-transmission direction bearing of the base, and then enters the air outlet duct, forming a cycle, taking away the heat of the bearing.
大幅减小转子风阻,降低冷却器电机功率和实现电机进出风均匀布置,降低电机圆周温差,充分利用冷却能力。The wind resistance of the rotor is greatly reduced, the power of the cooler motor is reduced, the air in and out of the motor is evenly arranged, the circumferential temperature difference of the motor is reduced, and the cooling capacity is fully utilized.
附图说明Description of the drawings
图1为本发明的立体结构示意图;Figure 1 is a schematic diagram of the three-dimensional structure of the present invention;
图2为本发明图1的前视图,图中箭头表示为风的流向;Fig. 2 is a front view of Fig. 1 of the present invention, and the arrow in the figure indicates the flow direction of the wind;
图3为本发明图1的右视图,图中箭头表示为风的流向;Fig. 3 is a right side view of Fig. 1 of the present invention, the arrow in the figure indicates the flow direction of the wind;
图4为本发明传动方向进风口的示意图;Figure 4 is a schematic diagram of the air inlet in the driving direction of the present invention;
图5为本发明的非传动方向出风口示意图;Fig. 5 is a schematic diagram of the air outlet in the non-transmission direction of the present invention;
图6为本发明轴向通风孔的示意图;Figure 6 is a schematic diagram of the axial ventilation hole of the present invention;
图7为本发明轴向通风孔的内部示意图,图中箭头表示为风的流向。Fig. 7 is an internal schematic diagram of the axial ventilation hole of the present invention, and the arrow in the figure indicates the flow direction of the wind.
其中:1、进风集风道;2、机座;3、出风集风道;4、风机;5、进风风道;6、进风口;61、上进风口;62、下进风口;7、出风口;71、上出风口;72、下出风口;8、转子支架;81、轴向通风孔;9、支撑板;10、冷却器;11、冷却水管。Among them: 1. Inlet air collecting duct; 2. Machine base; 3. Air outlet collecting duct; 4. Fan; 5. Inlet air duct; 6. Air inlet; 61, upper air inlet; 62, lower air inlet; 7. Air outlet; 71. Upper air outlet; 72. Lower air outlet; 8. Rotor bracket; 81. Axial ventilation holes; 9. Support plate; 10. Cooler; 11. Cooling water pipe.
具体实施方式detailed description
下面结合附图对本发明做进一步详细描述:The present invention will be further described in detail below in conjunction with the accompanying drawings:
如图1-3所示,一种风力发电机闭式冷却结构,自左至右依次包括进风集风道1、机座2、出风集风道3以及风机4。As shown in Figures 1-3, a closed cooling structure of a wind power generator includes an inlet air collecting duct 1, a base 2, an outlet air collecting duct 3, and a fan 4 from left to right.
机座2上设置有传动方向和非传动方向。The base 2 is provided with a transmission direction and a non-transmission direction.
进风集风道1位于传动方向,进风集风道1与机座2通过螺栓固定。The air inlet and air collecting duct 1 is located in the driving direction, and the air inlet and air collecting duct 1 and the machine base 2 are fixed by bolts.
出风集风道3位于非传动方向,出风集风道3与机座2通过螺栓固定。The outlet air collecting duct 3 is located in the non-transmission direction, and the outlet air collecting duct 3 and the machine base 2 are fixed by bolts.
进风集风道1和出风集风道3分别设置为半圆形,方便风的循环方向。The inlet air collecting duct 1 and the outlet air collecting duct 3 are respectively arranged in a semicircular shape to facilitate the circulation direction of the wind.
进风集风道1与出风集风道3之间设置有进风风道5,进风风道5的一端与进风集风道1连通,进风风道5的另一端与风机4连通。An air inlet duct 5 is set between the air inlet duct 1 and the outlet air duct 3, one end of the air inlet duct 5 is connected to the air inlet duct 1, and the other end of the air duct 5 is connected to the fan 4 Connected.
风机4与出风集风道3之间连通有冷却器10,冷却器10内部穿设有冷却水管11,冷却水管11呈非直线形,优选冷却水管11为螺旋形,增加风与冷却水管11的接触面积,将风的温度传递给冷却水管11,进行降低风的温度。A cooler 10 is connected between the fan 4 and the air outlet duct 3, and a cooling water pipe 11 is passed through the inside of the cooler 10. The cooling water pipe 11 is in a non-linear shape. The contact area of the wind is transmitted to the cooling water pipe 11 to lower the temperature of the wind.
进风风道5和风机4设置两组,增加风速的流动性。Two sets of air inlet duct 5 and fan 4 are arranged to increase the fluidity of the wind speed.
参照图4和图5,机座2的传动方向开设有三个进风口6,三个进风口6包括一个上进风口61和两个下进风口62,上进风口61和下进风口62在机座2上呈圆周间隔分布。4 and 5, the transmission direction of the base 2 is provided with three air inlets 6, the three air inlets 6 include an upper air inlet 61 and two lower air inlets 62, the upper air inlet 61 and the lower air inlet 62 in the base 2 The upper part is distributed at circumferential intervals.
机座2的非传动方向开设有八个出风口7,八个出风口7包括四个上出风口71和四个下出风口72,四个上出风口71和四个下出风口72在机座2上呈圆周间隔分布。The base 2 is provided with eight air outlets 7 in the non-transmission direction. The eight air outlets 7 include four upper air outlets 71 and four lower air outlets 72. Four upper air outlets 71 and four lower air outlets 72 are installed on the machine. The seats 2 are distributed at circumferential intervals.
三个进风口6和八个出风口7的结构设置,解决了圆周方向温差的问题。The structural arrangement of three air inlets 6 and eight air outlets 7 solves the problem of temperature difference in the circumferential direction.
根据位置设计不同大小的风口,距离风道近的风口风阻小,设计的上进风口61和上出风口71也小;距离风道远的风口风阻大,设计的上进风口61和上出风口71也大,这样能保证圆周方向所有进出风口7的风流量均匀,冷却温差小。Different sizes of air outlets are designed according to the location. The air resistance near the air duct is small, and the upper air inlet 61 and the upper air outlet 71 are designed to be small; the air outlets far away from the air duct have large air resistance, and the upper air inlet 61 and the upper air outlet 71 are also designed. This can ensure that the air flow of all the air inlets and outlets 7 in the circumferential direction is uniform and the cooling temperature difference is small.
参照图6和图7机座2内焊接有转子支架8,转子支架8上开设有十二个轴向通风孔81,十二个轴向通风孔81自左到右贯穿整个转子支架8,十二个轴向通风孔81均分间隔分布在转子支架8的侧壁上。Referring to Figures 6 and 7, a rotor support 8 is welded in the machine base 2. The rotor support 8 is provided with twelve axial ventilation holes 81, and the twelve axial ventilation holes 81 penetrate the entire rotor support 8 from left to right. The two axial ventilation holes 81 are equally spaced and distributed on the side wall of the rotor support 8.
在转子支架8上增加轴向通风孔81,可以大幅减小转子风阻,降低冷却器10电机功率。同时可以加大轴承周围的冷却风量,改善轴承冷却 效果。The addition of axial ventilation holes 81 on the rotor support 8 can greatly reduce the wind resistance of the rotor and reduce the motor power of the cooler 10. At the same time, the cooling air volume around the bearing can be increased to improve the cooling effect of the bearing.
转子支架8上焊接有支撑板9,支撑板9为转子支架8上的圆周分布的加强筋,转子支撑板9可以充当扇叶,增加机舱内部冷热空气的对流,同时风阻减小20%以上,电机最高温升降低10%,可以大幅改善冷却效果,实现发电机升功设计,提高了电机的功率密度。The rotor support 8 is welded with a support plate 9 which is a circumferential reinforcing rib on the rotor support 8. The rotor support plate 9 can act as a fan blade to increase the convection of hot and cold air inside the nacelle, while reducing the wind resistance by more than 20% , The maximum temperature rise of the motor is reduced by 10%, which can greatly improve the cooling effect, realize the design of generator power increase, and increase the power density of the motor.
工作原理:冷却风机4为离心式风机,由其提供动力,将发电机内部的热风从机座2非传动方向,经过出风集风道1、出风口7,吸入冷却风机4。同时,冷却风机4中通入冷却液,将热风冷却。冷却风机4再将冷空气,经进风风道5、进风集风道1,吹入发电机内部。Working principle: The cooling fan 4 is a centrifugal fan, powered by it, and draws the hot air inside the generator from the non-transmission direction of the base 2 through the air outlet duct 1 and the air outlet 7 to the cooling fan 4. At the same time, cooling liquid is introduced into the cooling fan 4 to cool the hot air. The cooling fan 4 then blows the cold air into the generator through the air inlet duct 5 and the air inlet duct 1.
冷风经过发电机机座2传动方向的绕组端部、定转子之间的气隙、机座2非传动方向的绕组端部,再进入出风集风道3,形成一个循环,带走了绕组、定子铁心的热量。同时另一路,冷风经过发电机机座2传动方向轴承、转子支架的轴向通风孔81、机座2非传动方向轴承,再进入出风集风道3,形成一个循环,带走了轴承的热量。The cold wind passes through the end of the winding in the transmission direction of the generator base 2, the air gap between the stator and the rotor, and the end of the winding in the non-transmission direction of the base 2, and then enters the air outlet duct 3, forming a cycle, taking the winding away , The heat of the stator core. At the same time, the cold air passes through the transmission direction bearing of the generator frame 2, the axial ventilation hole 81 of the rotor support, and the non-transmission direction bearing of the frame 2, and then enters the air outlet duct 3, forming a cycle, taking away the bearing Heat.
本实施例采用闭式冷却结构,相对于开式冷却结构而言,开式冷却结构冷却介质从电机外部进入,再排出到电机外部;闭式冷却结构,冷却介质只在电机内部循环。闭式冷却结构能够避免将机舱中的油汽、盐雾吸入电机内部,对绝缘造成不良影响。This embodiment adopts a closed cooling structure. Compared with the open cooling structure, the cooling medium of the open cooling structure enters from the outside of the motor, and then is discharged to the outside of the motor; in the closed cooling structure, the cooling medium only circulates inside the motor. The closed cooling structure can prevent the oil vapor and salt mist in the engine room from being sucked into the motor, which will adversely affect the insulation.
应当理解的是,本申请并不局限于上面已经描述的内容,并且可以在不脱离其范围进行各种修改和改变。本申请的范围仅由所附的权利要求来限制。It should be understood that this application is not limited to what has been described above, and various modifications and changes can be made without departing from its scope. The scope of the application is only limited by the appended claims.

Claims (10)

  1. 一种风力发电机闭式冷却结构,其特征在于,自左至右依次包括进风集风道(1)、机座(2)、出风集风道(3)以及风机(4);A closed cooling structure for a wind power generator, which is characterized in that it includes an inlet air collecting duct (1), a base (2), an outlet air collecting duct (3) and a fan (4) from left to right;
    所述机座(2)上设置有传动方向和非传动方向;The base (2) is provided with a transmission direction and a non-transmission direction;
    所述进风集风道(1)位于传动方向,所述进风集风道(1)与机座(2)连接;The air inlet and air collecting duct (1) is located in the transmission direction, and the air inlet and air collecting duct (1) is connected with the machine base (2);
    所述出风集风道(3)位于非传动方向,所述出风集风道(3)与机座(2)连接;The outlet air collecting duct (3) is located in the non-transmission direction, and the outlet air collecting duct (3) is connected to the machine base (2);
    所述进风集风道(1)与出风集风道(3)之间设置有进风风道(5),所述进风风道(5)的一端与进风集风道(1)连通,所述进风风道(5)的另一端与风机(4)连通;An air inlet air duct (5) is provided between the air inlet air collecting duct (1) and the air outlet air collecting duct (3), and one end of the air inlet air duct (5) is connected to the air inlet air collecting duct (1). ) Is connected, and the other end of the air inlet duct (5) is connected with the fan (4);
    所述风机(4)与出风集风道(3)连通。The fan (4) is connected with the outlet air collecting duct (3).
  2. 根据权利要求1所述的风力发电机闭式冷却结构,其特征在于,所述进风风道(5)和风机(4)至少设置一组。The closed cooling structure of a wind power generator according to claim 1, wherein at least one set of the air inlet duct (5) and the fan (4) is provided.
  3. 根据权利要求1所述的风力发电机闭式冷却结构,其特征在于,所述进风集风道(1)和出风集风道(3)分别设置为半圆形。The closed cooling structure of a wind power generator according to claim 1, wherein the inlet air collecting duct (1) and the outlet air collecting duct (3) are respectively arranged in a semicircular shape.
  4. 根据权利要求1所述的风力发电机闭式冷却结构,其特征在于,所述机座(2)的传动方向设置有若干进风口(6),所述进风口(6)在机座(2)上呈圆周间隔分布;The closed cooling structure of a wind power generator according to claim 1, wherein a plurality of air inlets (6) are provided in the transmission direction of the base (2), and the air inlets (6) are in the base (2). ) Are distributed at circumferential intervals;
    所述机座(2)的非传动方向设置有若干出风口(7),所述出风口(7)在机座(2)上呈圆周间隔分布。A plurality of air outlets (7) are arranged in the non-transmission direction of the machine base (2), and the air outlets (7) are distributed at a circumferential interval on the machine base (2).
  5. 根据权利要求4所述的风力发电机闭式冷却结构,其特征在于,所述进风口(6)距离进风风道(5)由近到远的面积逐渐增大;The closed cooling structure of a wind power generator according to claim 4, characterized in that the area of the air inlet (6) from the air inlet duct (5) gradually increases from near to far;
    所述出风口(7)距离进风风道(5)由近到远的面积逐渐增大。The area of the air outlet (7) from the air inlet duct (5) gradually increases from near to far.
  6. 根据权利要求1所述的风力发电机闭式冷却结构,其特征在于,所述机座(2)内设置有转子支架(8),所述转子支架(8)上设置有若干轴向通风孔(81),所述轴向通风孔(81)自左到右贯穿整个转子支架(8)。The closed cooling structure of a wind power generator according to claim 1, wherein a rotor support (8) is provided in the base (2), and a plurality of axial ventilation holes are provided on the rotor support (8). (81), the axial ventilation hole (81) penetrates the entire rotor support (8) from left to right.
  7. 根据权利要求6所述的风力发电机闭式冷却结构,其特征在于,所 述轴向通风孔(81)均分间隔分布在转子支架(8)的侧壁上。The closed cooling structure of a wind power generator according to claim 6, characterized in that the axial ventilation holes (81) are equally spaced and distributed on the side wall of the rotor support (8).
  8. 根据权利要求6所述的风力发电机闭式冷却结构,其特征在于,所述转子支架(8)上设置有支撑板(9),所述支撑板(9)为转子支架(8)上的圆周分布的加强筋。The closed cooling structure of a wind power generator according to claim 6, characterized in that, a support plate (9) is provided on the rotor support (8), and the support plate (9) is a part of the rotor support (8). Stiffeners distributed around the circumference.
  9. 根据权利要求1所述的风力发电机闭式冷却结构,其特征在于,所述风机(4)与出风集风道(3)之间设置有冷却器(10),所述冷却器(10)中设置有冷却水管(11),所述冷却水管(11)呈非直线形。The closed cooling structure of a wind power generator according to claim 1, wherein a cooler (10) is provided between the fan (4) and the air outlet duct (3), and the cooler (10) ) Is provided with a cooling water pipe (11), and the cooling water pipe (11) is non-linear.
  10. 根据权利要求9所述的风力发电机闭式冷却结构,其特征在于,所述冷却水管(11)呈螺旋形。The closed cooling structure of a wind power generator according to claim 9, characterized in that the cooling water pipe (11) has a spiral shape.
PCT/CN2020/099367 2019-09-03 2020-06-30 Wind turbine closed cooling structure WO2021042848A1 (en)

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