CN113315276A

CN113315276A - Stator cooling device, motor and wind generating set

Info

Publication number: CN113315276A
Application number: CN202110613771.8A
Authority: CN
Inventors: 赵江玮; 李延慧; 何海涛
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Jinfeng Technology Co ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-08-27
Anticipated expiration: 2041-06-02
Also published as: CN113315276B

Abstract

The utility model provides a stator cooling device, motor and wind generating set, stator cooling device includes the stator support, the stator support is used for supporting the unshakable in one's determination of motor, the stator support includes stator support main part and a plurality of hollow tube, the hollow tube is followed the circumference interval arrangement of stator support is in the periphery of stator support main part, just the hollow tube is followed the axial extension of stator support, the hollow tube has radial ventiduct and/or axial ventiduct, has increased the air volume of air gap, has also increased ventilation system's ventiduct to the cooling speed of motor has also just also been improved.

Description

Stator cooling device, motor and wind generating set

Technical Field

The utility model belongs to the technical field of wind power generation, especially, relate to a stator cooling device, motor and wind generating set.

Background

Wind power generation is one of important sources of electric energy, a generator is one of important components of a wind power generator set, the problem of cooling and heat dissipation of the generator is well noticed, and as an air gap of the generator is an important index, the smaller the air gap is, the better the electromagnetic performance is, but the poorer the ventilation capacity of the air gap is, the higher the temperature rise is, and the temperature rise has the negative effect on the electromagnetic performance.

How to rapidly cool the stator bracket is a technical problem that needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

The main object of the present disclosure is to provide a stator cooling device, a motor and a wind turbine generator system, so as to improve the cooling speed of the motor.

In view of the above purpose, the present disclosure provides the following technical solutions:

in a first aspect of the present disclosure, a stator cooling device is provided, including a stator bracket for supporting an iron core of an electric machine, the stator bracket includes a stator bracket main body and a plurality of hollow pipes, the hollow pipes are arranged in a periphery of the stator bracket main body at intervals in a circumferential direction of the stator bracket, and the hollow pipes are arranged in an axial direction of the stator bracket, and the hollow pipes have a radial air duct and/or an axial air duct. So set up, increased the air volume of air gap, also increased ventilation system's air volume to the cooling speed of motor has also been improved.

In an exemplary embodiment of the present disclosure, the axial ventilation channel includes a first end opening and a second end opening communicating with the lumen of the hollow tube, the first end opening and the second end opening being located at both axial ends of the hollow tube, respectively. So set up, through set up the tip opening on the hollow tube, increase ventilation system's air volume, simple structure, low in manufacturing cost is honest and clean.

Specifically, radial ventilation way still including set up in the annular of taking a breath at the axial middle part of hollow tube, the annular intercommunication of taking a breath the hollow tube with the radial outside of stator support, stator support includes the stator collection wind chamber with external intercommunication, stator collection wind chamber can be adjacent through circumference iron core return air passageway between the hollow tube with stator support's radial outside intercommunication. So set up, through set up stator air collecting cavity in stator support inboard, increased ventilation system's air volume, simple structure, and easily make.

Further, the stator support still includes annular collection wind chamber, annular collection wind chamber is followed stator support's circumference extends, annular collection wind chamber set up in the axial middle part of hollow tube, the connecting piece passageway of hollow tube passes through the annular of taking a breath with annular collection wind chamber intercommunication, so that it is a plurality of the connecting piece passageway communicates each other. So set up, can make a plurality of hollow tubes communicate each other through setting up annular collection wind chamber to can make stator support have the same temperature, be convenient for evenly cool down.

The iron core comprises alternately arranged punching sheets and spacing strips, each punching sheet comprises a pair of long punching sheets and a pair of short punching sheets, the radial inner edges of the long punching sheets are abutted to side ring plates of the annular air collecting cavities, at least one iron core air removing channel is arranged between the long punching sheets, the annular air collecting cavities are communicated with the radial outer side space of the stator support through the iron core air removing channels, and the short punching sheets are arranged on the outer sides of the long punching sheets. So set up, increased the passageway quantity between air gap and the stator collection wind chamber through setting up iron core return air passageway and iron core wind channel, improved stator support's air volume to the cooling rate of motor has been improved.

Specifically, stator support includes main supporting ring board and a pair of inclined support board, main supporting ring board is the cylindric, and is a pair of inclined support board is followed the axial tip of main supporting ring board is to the slope of radial outside and is extended, stator wind-collecting cavity is located between main supporting ring board and a pair of inclined support board, the radial outer fringe of inclined support board is provided with and is used for holding the connecting piece accommodation hole of hollow tube. So set up, form hollow structure through main supporting ring board and a pair of inclined support board, the solid construction of more equal weight has better anti-deformation ability.

Furthermore, an inclined plate air vent is arranged on the inclined support plate, and the stator air collection cavity is communicated with the outside through the inclined plate air vent.

Optionally, the stator support further includes a channel ring plate and a pair of side ring plates located at two axial ends of the channel ring plate, the radial inner side of each side ring plate is fixed at two axial ends of the channel ring plate, the radial outer side of each side ring plate extends to the radial outer side of the hollow tube, and the annular wind collecting cavity is located between the channel ring plate and the pair of side ring plates. So set up, enclose through passageway crown plate and a pair of side crown plate and form annular collection wind chamber, simple structure just has the deformation capacity of preapring for an unfavorable turn of events betterly.

Further, the channel ring plate is located on the radial inner side of the hollow pipe, and the inner volume of the annular wind collecting cavity can be further increased due to the arrangement.

In another exemplary embodiment of the present disclosure, the stator support further includes a middle partition plate, the middle partition plate extends along a radial direction of the stator support to support between the passage ring plate and the main supporting ring plate, the middle partition plate is located at an axial middle portion of the main supporting ring plate, and a partition plate through hole is provided on the middle partition plate to communicate with the stator wind collecting cavities located at two sides of the middle partition plate. So set up, can cooperate through median septum and a pair of inclined support board to further improve stator support's anti-deformation ability.

Further, the stator support also comprises a reinforcing rib, and the reinforcing rib is connected between the main supporting ring plate and the inclined supporting plate. So set up, can improve the connection stability between main supporting ring board and the inclined support board through setting up the strengthening rib to further improve stator support's the deformability of preapring for an unfavorable turn of events.

A second aspect of the present disclosure provides a motor, the motor includes a stator, a rotor, and a ventilation system, the rotor is rotatably sleeved on the periphery of the stator, the outer surface of the stator is separated from the inner surface of the stator by an annular air gap, the stator includes an iron core, a winding, and a stator bracket as above, the iron core is fixed on the hollow tube, the winding is wound on the iron core, and the hollow tube is communicated with the ventilation system. So set up, through setting up radial ventilation way and/or axial ventilation way at the hollow tube, increased the air volume of air gap to increase ventilation system's air volume, also improved the cooling speed of motor.

Furthermore, the ventilation system comprises a bracket side cavity located between the axial inner side of the stator bracket and the rotor bracket, the bracket side cavity is communicated with the outside through a bracket side channel, the bracket side channel penetrates through the axial two ends of the stator bracket, and the bracket side cavity is communicated with the air gap and/or the connecting piece channel. So set up, stator support can carry out gas exchange through axial both ends and external to can improve the heat dissipation capacity of motor.

In a third aspect of the present disclosure, a wind park is provided, comprising an electric machine as described above.

The stator cooling device, the motor and the wind generating set provided by the disclosure at least have the following beneficial effects: the stator cooling device provided by the disclosure comprises a stator support, wherein the stator support comprises a support main body and a plurality of hollow pipes, the hollow pipes are provided with connecting piece channels communicated with a ventilation system, so that the ventilation volume of the ventilation system is increased, and the cooling speed of a motor is increased.

Drawings

The above and/or other objects and advantages of the present disclosure will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a motor according to an exemplary embodiment of the present disclosure.

Fig. 2 is a structural view of the stator frame in fig. 1.

Fig. 3 is an axial sectional view of the stator frame of fig. 2.

Fig. 4 is a longitudinal cross-sectional view of the hollow tube of fig. 3.

Fig. 5 is an end side view of the hollow tube of fig. 3.

Fig. 6 is a structural view illustrating a state in which the core and the side ring plates are coupled in fig. 1.

Fig. 7 is a cross-sectional view taken along line D-D in fig. 6.

Fig. 8 is a schematic view of the first path of gas flow.

FIG. 9 is a schematic view showing the flow direction of the second gas.

Fig. 10 is a schematic view showing the third gas flow direction.

FIG. 11 is a schematic view showing the flow direction of the fourth gas.

Fig. 12 is a side view of the stator frame of fig. 2.

Fig. 13 is a structural view of the inclined support plate in fig. 12.

Description of reference numerals:

10. a stator support; 20. A rotor support;

30. a rotating shaft; 40. Fixing a shaft;

60. a bearing; 110. A hollow tube;

111. a fastener mounting hole; 112. A fabrication hole;

113. fixing the clamping plate; 114. Supporting the rib plate;

115. a scavenging ring groove; 120. An inclined support plate;

121. a sloping plate air vent; 122. A connector receiving hole;

123. a manhole; 124. A manhole support plate;

131. a channel ring plate; 132. A side ring plate;

140. a middle partition plate; 141. A partition plate through hole;

150. reinforcing ribs; 160. A flange;

170. a main support ring plate; 180. An iron core;

181. short punching sheets; 182. A long punching sheet;

183. a spacer bar; 190. A winding;

210. a rotor support body; 220. An end plate;

230. a connecting member; 511. An end plate side cavity;

512. an air gap; 513. An iron core return air channel;

514. a stator air collection cavity; 515. An air exhaust channel;

521. a connector channel; 522. An annular air collection cavity;

523. an iron core air removal channel; 531. A stent side channel;

532. a bracket side cavity.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the aspects of the present disclosure are limited to the embodiments set forth herein. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The utility model provides a wind generating set, this wind generating set includes the pylon, sets up in the motor on pylon top, and this motor includes stator, rotor and ventilation system, and the periphery at the stator is established to the rotatable cover of rotor, separates through annular air gap 512 between the surface of stator and the internal surface of rotor.

The motor is an electromagnetic device for realizing electric energy conversion or transmission according to an electromagnetic induction law. The electric machine of the present disclosure may be a generator or an electric motor. The figures show, as an example, a block diagram of a generator.

Referring to fig. 1 to 6, in particular, the present disclosure provides a stator cooling device, which may include a stator bracket 10, a core 180, and a winding 190, the stator bracket 10 may include a stator bracket body and a plurality of hollow tubes 110, the hollow tubes 110 may be arranged at intervals in a circumferential direction of the stator bracket 10 at an outer periphery of the stator bracket body, and each hollow tube 110 extends in an axial direction of the stator bracket 10, the core 180 may be fixed on the hollow tube 110, and the winding 190 may be wound on the core 180. Further, the hollow tube 110 has a radial air passage and/or an axial air passage communicating with the ventilation system.

The stator support 10 provided by the present disclosure includes a stator support main body and a hollow pipe 110, the hollow pipe 110 has a radial ventilation channel and/or an axial ventilation channel communicated with a ventilation system, increasing the ventilation amount of the air gap 512 and also increasing the ventilation amount of the ventilation system, thereby increasing the cooling speed of the motor.

As an example, the inner cavity of the hollow tube 110 penetrates both axial ends of the hollow tube 110, and may be formed as a connector passage 521, and the connector passage 521 may serve as one of the axial ventilation channels. The axial ventilation channel communicated with the ventilation system is arranged in the hollow tube 110, so that the ventilation quantity of the air gap 512 is increased, and the cooling speed of the motor is increased.

Further, the ventilation system may include a stator wind collecting cavity 514 communicated with the outside, in this embodiment, the hollow pipe 110 may be located at a radial edge of the stator wind collecting cavity 514, an axial middle portion of the hollow pipe 110 is provided with a ventilation ring groove 115, the ventilation ring groove 115 communicates the hollow pipe 110 and the air gap 512, and the stator wind collecting cavity 514 may further communicate with the air gap 512 through an iron core return air channel 513 formed by a gap between circumferentially adjacent hollow pipes 110.

Specifically, in this embodiment, air may enter the hollow tube 110 through the first end opening and the second end opening at the two axial ends of the hollow tube 110, and flow toward the middle of the hollow tube 110 along the axial direction of the stator bracket, and when reaching the position of the ventilation ring groove 115, may flow outward from the ventilation ring groove 115 toward the radial direction of the stator bracket, that is, flow through the core wind-removing channel 523, to enter the air gap 512 and flow toward the two axial ends of the stator bracket along the axial direction of the stator bracket in the air gap 512, so as to be dispersed to different parts of the same core 180, and further, the air in the air gap 512 flows back to the stator wind-collecting cavity 514 through the core wind-returning channel 513, so as to take away heat generated by the core 180 and the winding 190. So set up, this disclosed stator support can include from the hollow tube 110 of axial both ends air inlet and middle part air-out, has increased the ventiduct to the radiating efficiency has been improved. Further, the hollow pipe 110 is arranged at the circumferential edge of the stator support main body, so that the heat dissipation efficiency of the iron core can be accelerated, and the heat dissipation efficiency of the motor is improved.

With such arrangement, in the working process of the motor, heat generated by the iron core 180 and the winding 190 can enter the stator air collecting cavity 514 through the iron core return air channel 513 along the radial direction of the stator bracket 10, and is discharged through the air outlet of the stator air collecting cavity 514.

Further, by arranging the hollow pipe 110 and arranging the air exchange ring groove 115 in the axial middle of the hollow pipe 110, an air duct can be added to the stator support, namely, air can enter the hollow pipe 110 through two axial ends, can flow out through the air exchange ring groove 115 and flow towards the radial outer side to enter the air gap 512, and then enters the stator air collecting cavity 514 through the iron core return air channel 513 and is discharged.

It can be understood that the present disclosure increases the ventilation channel for the air flow by arranging the hollow pipe 110, and increases the ventilation volume of the ventilation system, thereby increasing the cooling speed of the motor.

Referring to fig. 4 and 5, in particular, the cross section of the hollow pipe 110 may be substantially rectangular, and the hollow pipe 110 may include a support rib 114 having a U-shaped cross section and a fixing clip 113 fixed at a position of the U-shaped opening, wherein a ventilation ring groove 115 is formed at an axial middle portion of the support rib 114, and the fixing clip 113 continuously extends in an axial direction of the stator frame. To facilitate installation of the core 180, fastener mounting holes 111 are spaced on the fixing clamp plate 113 for mounting a punching sheet (described below).

To facilitate the installation operation, the support webs 114 are provided with tooling holes 112, such as, but not limited to, the tooling holes 112 are provided on the radially inner side walls of the hollow tubes 110. After the stator support is assembled, the fabrication holes 112 may be blocked to prevent the gas in the hollow tube 110 from entering the stator wind collecting cavity 514 from the fabrication holes 112 to cause the short circuit of the air passage.

As an example, the fabrication holes 112 may be long waist holes extending along the axial direction of the fixed shaft, and as required, there may be 1 fabrication hole 112 or a plurality of fabrication holes, and the plurality of fabrication holes 112 may be arranged on the radially inner side wall of the hollow tube 110 at intervals along the axial direction of the fixed shaft. Optionally, an air outlet of the stator air collecting cavity 514 may be communicated with an air pump, so that the stator air collecting cavity 514 generates negative pressure, thereby facilitating air outside the hollow tube 110 to rapidly enter the hollow tube 110, and increasing the flowing speed of the air to increase the cooling speed of the ventilation system.

In order to further increase the cooling rate of the motor, the ventilation system may further include an annular wind-collecting chamber 522, and the annular wind-collecting chamber 522 may extend in the circumferential direction of the stator frame 10 and be located at the axial middle portion of the hollow tube 110 and communicate with the ventilation ring groove 115 of the hollow tube 110, so that the plurality of connector channels 521 communicate with each other. So set up, annular collection wind chamber 522 can be with a plurality of connecting piece passageways 521 intercommunication to make the gas in a plurality of connecting piece passageways 521 have the same temperature, thereby can make the motor evenly cool down.

As an example, as shown in fig. 2, the stator frame 10 may further include a channel ring plate 131 and a pair of side ring plates 132 located at two axial ends of the channel ring plate 131, an inner edge of the side ring plate 132 is fixed to the two axial ends of the channel ring plate 131, an outer edge of the side ring plate 132 extends to a radial outer side of the hollow pipe 110, a plurality of hollow pipe installation holes are provided on the side ring plate 132, the hollow pipe 110 may be disposed in the hollow pipe installation holes, the ventilation ring groove 115 is located at an axial inner side of the side ring plate 132, or an edge of the ventilation ring groove 115 coincides with an edge of the hollow pipe installation hole, and the annular wind collecting cavity 522 is located between the channel ring plate 131 and the pair of side ring plates 132, that is, the annular wind collecting cavity 522 is formed by surrounding the channel ring plate 131 and the pair of side ring plates 132.

By way of example, the side ring plate 132 may be in direct contact with the hollow tube 110, or a sealant may be provided at the junction between the side ring plate 132 and the hollow tube 110 to provide sealed communication between the connector passage 521 and the annular wind-collecting chamber 522. Optionally, a channel ring plate 131 may be located radially inward of the hollow tube 110 to increase the volume of the annular wind-collecting chamber 522.

With continued reference to the drawings, the stator frame body may be a frame structure to reduce the weight of the stator frame 10, the stator frame body may be substantially cylindrical, and the hollow tube 110 may be provided on the outer circumferential wall of the stator frame body. Further, the hollow tube 110 may have a hollow tubular structure and may extend in the axial direction of the fixed shaft.

Referring to fig. 6 to 11, the core 180 may include punching sheets and spacer bars 183 alternately arranged along an axial direction of the fixed shaft, each punching sheet may include a pair of long punching sheets 182 and a pair of short punching sheets 181, a radially inner edge of each long punching sheet 182 abuts against the side ring plate 132 of the annular wind collecting cavity 522, for example, but not limited to, the radially inner edge of each side ring plate 132 may abut against a radially outer edge of the side ring plate 132, at least one core wind removing channel 523 is disposed between the pair of long punching sheets 182, and the core wind removing channel 523 may be formed by a gap between a pair of hollow tubes 110 circumferentially adjacent to each other between the pair of long punching sheets 182. The annular wind collecting chamber 522 communicates with a space radially outside the stator frame 10, for example, but not limited to, may communicate with the air gap 512, through the core wind removing passage 523. The short stamped sheets 181 can be arranged on the outer sides of the pair of long stamped sheets 182, so that a gap between the pair of circumferentially adjacent hollow tubes 110 between the short stamped sheets 181 and the long stamped sheets 182 and a gap between the pair of circumferentially adjacent hollow tubes 110 between the adjacent short stamped sheets 181 form an iron core return air channel 513, and the iron core return air channel 513 can communicate the air gap 512 with the stator air collecting cavity 514. In this embodiment, the iron core 180 may be formed by laminating stamped sheets, optionally, the stamped sheets may be directly connected to the hollow tube 110, and the fastener may connect the stamped sheets in the fastener mounting holes to mount the stamped sheets on the hollow tube 110, but not limited thereto.

As required, the short punched pieces 181 may be disposed outside the pair of long punched pieces 182, but not limited thereto, the short punched pieces 181 may also be disposed between the pair of long punched pieces 182 to increase the number of the core wind-removing channels 523 in the annular wind-collecting cavity 522, as shown in the figure, the pair of short punched pieces 181 is disposed between the pair of long punched pieces 182, the short punched pieces 181 directly contact the long punched pieces 182, and the spacer 183 is disposed between the pair of short punched pieces 181 to provide one core wind-removing channel 523 between the pair of long punched pieces 182.

Specifically, the iron core 180 may include a pair of long laminations 182, a plurality of short laminations 181 and a spacer 183, the spacer 183 is disposed between adjacent short laminations 181, a circumferential dimension (width) of the spacer 183 along the stator bracket 10 may be smaller than a circumferential dimension (width) of the short laminations 181 along the stator bracket, a winding 190 is disposed on an outer periphery of the iron core 180, that is, the winding 190, the spacer 183 and two adjacent short laminations 181 surround the iron core to form an iron core return air channel 513, so that the air gap 512 is communicated with the stator air collecting cavity 514 through the iron core return air channel 513, and ventilation of the stator bracket is improved.

In this embodiment, a radial inner edge of the long stamped steel 182 is connected to a radial outer edge of the side ring plate 132, and a dimension of the long stamped steel 182 along the axial direction of the stator bracket may be the same as a dimension of the side ring plate 132 in the direction. The short punching sheet 181 may have different axial dimensions in the stator frame so as to be adjusted as required.

In order to further improve the sealing performance of the stator frame 10, the radially inner edge of the long stamped steel 182 abuts against the radially outer edge of the side ring plate 132, and the long stamped steel 182 is connected with the side ring plate 132 in a sealing mode.

With continued reference to fig. 1, the rotor holder 20 may include a rotor holder body 210, an end plate 220, and a coupling member 230, wherein the rotor holder body 210 has a cylindrical shape, the end plate 220 and the coupling member 230 are respectively disposed at both axial ends of the rotor holder body 210, and the coupling member 230 is coupled between the rotor holder body 210 and the rotation shaft 30 to couple the rotor holder 20 to the rotation shaft 30.

Further, referring to fig. 1 and 8 to 11, the ventilation system may include an end plate side cavity 511 and a bracket side cavity 532, the end plate side cavity 511 is located between the end plate 220 and the stator bracket 10, the bracket side cavity 532 is located between the connector 230 and the stator bracket 10, and the end plate side cavity 511 and the bracket side cavity 532 are respectively disposed outside both axial ends of the hollow tube 110 and can be communicated with the connector passage 521 and the air gap 512. It is understood that both axial ends of the air gap 512 may communicate with the outside through the end plate-side cavity 511 and the bracket-side cavity 532, respectively. Both axial ends of the connector passage 521 may communicate with the outside through the end plate side cavity 511 and the bracket side cavity 532, respectively. Specifically, a bracket side passage 531 is provided on the stator bracket 10, the bracket side passage 531 penetrates through both axial ends of the stator bracket 10, and the bracket side cavity 532 is communicated with the outside through the bracket side passage 531.

Specifically, the direction of airflow in the motor can be roughly divided into the following paths:

the external air may enter the end plate side cavity 511, and the end plate side cavity 511 may be divided into two paths, a first path of air may enter the connector passage 521, and a second path of air may enter the air gap 512.

Further specifically, referring to fig. 8, the external cold air enters the end plate side cavity 511 and is split, the first path of air enters the connector channel 521 through the axial outer end of the hollow pipe 110, and is diffused toward the middle along the extending direction of the connector channel 521 to enter the annular air collecting cavity 522 through the air exchanging ring groove 115, so that the air in the plurality of connector channels 521 can be mixed in the annular air collecting cavity 522 to make the temperature of the motor uniform in the circumferential direction. The air in the annular air collecting cavity 522 can enter the air gap 512 through the iron core air outlet channel 523 and diffuse along the axial direction of the air gap 512, and the air in the iron core air return channel 513 diffuses in the radial direction and flows into the stator air collecting cavity 514, and the stator air collecting cavity 514 is communicated with the outside through the air exhaust channel 515 to take away the heat generated by the iron core 180 and the winding 190, thereby completing the first path of air exchange.

Referring to fig. 9, the second path of air divided in the end plate side cavity 511 enters the air gap 512 through the axial outer end of the air gap 512, and diffuses toward the middle of the air gap 512 along the axial direction of the air gap 512, and is dispersed into a plurality of branches of air flows in the axial flow process, and the branches of air flows enter the stator air collecting cavity 514 through the iron core return air channel 513, and the stator air collecting cavity 514 is communicated with the outside through the exhaust channel 515, so that the heat exchange of the second path of air is completed.

In addition, the outside air can enter the bracket-side cavity 532 through the bracket-side passage 531, and the inside of the bracket-side cavity 532 can be divided into two paths, i.e., a third path of air and a fourth path of air, wherein the third path of air can enter the connector passage 521, and the fourth path of air can enter the air gap 512.

Referring to fig. 10, the gas in the bracket-side cavity 532 enters the connector passage 521 through the axial inner end of the hollow pipe 110, and diffuses toward the middle along the extending direction of the connector passage 521 to enter the annular wind collecting cavity 522 through the ventilation ring groove 115, and the gas in the plurality of connector passages 521 enters the annular wind collecting cavity 522 to be sufficiently mixed, so that the whole motor has substantially the same temperature, and the temperature of the motor is more uniform in the circumferential direction. The air in the annular air collecting cavity 522 can enter the air gap 512 through the iron core air outlet channel 523, and is diffused along the axial direction of the air gap 512 and passes through the iron core air return channel 513, the air in the iron core air return channel 513 is diffused in the radial direction and flows into the stator air collecting cavity 514, and the stator air collecting cavity 514 is communicated with the outside through the air exhaust channel 515 to take away the heat generated by the iron core 180 and the winding 190, thereby completing the heat exchange of the third path of air.

Referring to fig. 11, the fourth path of air divided in the bracket-side cavity 532 enters the air gap 512 through the axial inner end of the air gap 512, and is diffused toward the middle of the air gap 512 along the axial direction of the air gap 512, and is dispersed into a plurality of branches of air flows in the axial flow process, and enters the stator air collecting cavity 514 through the iron core air return channel 513, and the stator air collecting cavity 514 is communicated with the outside through the air exhaust channel 515, thereby completing the heat exchange of the fourth path of air.

The above description is for convenience of understanding that, in fact, there is no obvious path for the flow of gas, and in the same motor, the above four gases can exchange heat simultaneously, so that the first, second, third and fourth gases are not clearly separated from each other.

Further, with continued reference to fig. 2 and 3, the stator frame body may include a main support ring plate 170 and a pair of inclined support plates 120, the main support ring plate 170 being cylindrical, for example, but not limited to, the main support ring plate 170 may be cylindrical, the pair of inclined support plates 120 extending obliquely radially outward from axial ends of the main support ring plate 170, and a stator wind collecting cavity 514 being located between the main support ring plate 170 and the pair of inclined support plates 120, i.e., the stator wind collecting cavity 514 is formed by the main support ring plate 170 and the pair of inclined support plates 120.

The disclosed stator frame main body may include a hollow structure composed of a main support ring plate 170 and a pair of inclined support plates 120, and has a simple structure and easy processing, and has a strong deformation resistance in comparison with a solid stator frame main body under the same weight.

As shown in fig. 12 and 13, in practice, the inclined support plate 120 has a conical shape, and the cross section of the inclined support plate 120 gradually increases from the axial middle portion of the stator frame to both ends thereof.

Further, at the radial outer edge of the inclined support plate 120, there are provided connector receiving holes 122 for receiving the hollow tubes 110, and the number of the connector receiving holes 122 may be set to 1 or at least two, as required. In the case where the number of the connector receiving holes 122 is at least two, the at least two connector receiving holes 122 may be provided at intervals in the circumferential direction of the diagonal support plate 120, and preferably, the at least two connector receiving holes 122 may be provided at equal intervals.

Inclined plate ventilation holes 121 are further formed in the inclined support plate 120, and the stator air collecting cavity 514 can be communicated with the outside through the inclined plate ventilation holes 121. It is understood that the bracket side channel 531 or the exhaust channel 515 may be connected to the swash plate ventilating holes 121.

In order to further improve the deformation resistance of the stator frame main body, referring to fig. 3, the stator frame main body may further include a reinforcing rib 150, and the reinforcing rib 150 is coupled between the main support ring plate 170 and the inclined support plate 120. It is understood that the reinforcing ribs 150 may be separately formed with the main support ring plate 170 and the inclined support plate 120 and then assembled together, or the reinforcing ribs 150, the main support ring plate 170 and the inclined support plate 120 may be integrally formed.

Specifically, as shown in fig. 12, a manhole 123 for an operator to pass through is further provided on the inclined support plate 120, and a manhole support plate 124 is further provided at the manhole 123 in order to further enhance the structural strength of the manhole 123.

Further, with continued reference to fig. 1 and 8 to 11, the stator frame body may further include a middle partition plate 140, the middle partition plate 140 may have a circular ring shape, a radially inner edge of the middle partition plate 140 is fixed to a radially outer side wall of the main support ring plate 170, a radially outer edge of the middle partition plate 140 is fixed to an inner side wall of the channel ring plate 131, and the deformation resistance of the stator frame may be further improved by supporting the middle partition plate 140 between the channel ring plate 131 and the main support ring plate 170. Preferably, the middle diaphragm 140 is located at an axial middle of the main support ring plate 170.

In order to increase the ventilation rate of the ventilation system, the middle partition 140 is provided with partition through holes 141 to communicate with the stator wind collecting chambers 514 on both sides of the middle partition 140. As an example, the supporter-side passage 531 may pass through the spacer through-hole 141 to introduce external air into the supporter-side cavity 532.

The motor provided by the present disclosure comprises a stator and a rotor, wherein the rotor is sleeved outside the stator, the rotor comprises a rotating shaft 30 and a rotor support 20, and the rotor support 20 is connected to the rotating shaft 30 and rotates along with the rotating shaft 30. The stator includes a stator support 10 and a fixed shaft 40, the rotating shaft 30 is rotatably sleeved on the periphery of the fixed shaft 40 through a bearing 60, and the stator support 10 is fixed on the fixed shaft 40.

Specifically, the stator frame 10 includes a stator frame body, the stator frame body includes a main supporting ring plate 170 disposed in a cylindrical shape, a flange 160 is disposed on an inner sidewall of the main supporting ring plate 170, and the stator frame 10 is connected to the fixed shaft 40 through the flange 160. Further, the flange 160 may be disposed to be offset from the axial middle of the main support ring plate 170, and after the stationary shaft 40 is coupled with the stator frame 10, the flange of the stationary shaft 40 may be supported at the axial middle of the main support ring plate 170, thereby making the stress of the stator frame 10 more uniform.

The stator frame 10 includes a pair of inclined support plates 120 at both axial ends thereof and a middle partition plate 140 disposed at an axial middle portion of the main support ring plate 170, and the middle partition plate 140 and the inclined support plates 120 are spaced apart from each other, so that the stator frame 10 is formed in a hollow structure, and the stator frame 10 provided by the present disclosure has a better deformation prevention capability than a solid structure of the same weight.

The stator support 10 further comprises a hollow pipe 110 arranged on the radial outer periphery side of the stator support body, the hollow pipe 110 extends along the axial direction of the fixed shaft, the hollow pipe 110 comprises a connecting piece channel 521 penetrating through two axial ends of the hollow pipe, and an axial ventilation channel of the stator support 10 is increased through the connecting piece channel 521, so that the heat dissipation speed of the iron core can be improved. The gas in the present disclosure may enter the motor through both axial ends of the stator frame 10.

Further, the axial middle part of the hollow tube 110 is provided with a ventilation ring groove 115, and the air flows through the core ventilation channel 523 through the ventilation ring groove 115 to enter the air gap 512, that is, the air gap 512 can be communicated with the hollow tube 110 through the ventilation ring groove 115.

The stator support 10 further comprises an annular air collecting cavity 522 which can be communicated with the hollow pipes 110, so that the whole stator support 10 has the same temperature, the motor can be uniformly cooled, and the local temperature of the motor is prevented from being too high.

In the description of the present disclosure, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the disclosure, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the disclosure.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means two or more unless otherwise specified.

In the description of the present disclosure, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

The described features, structures, or characteristics of the disclosure may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

Claims

1. A stator cooling device comprises a stator support and a stator core, wherein the stator support is used for supporting a motor, the stator support (10) comprises a stator support main body and a plurality of hollow pipes (110), the hollow pipes (110) are arranged on the periphery of the stator support main body at intervals in the circumferential direction of the stator support (10), the hollow pipes (110) extend in the axial direction of the stator support (10), and the hollow pipes (110) are provided with radial ventilation channels and/or axial ventilation channels.

2. The stator cooling arrangement of claim 1 wherein the axial plenum includes first and second end openings in communication with the interior cavity of the hollow tube, the first and second end openings being located at respective axial ends of the hollow tube.

3. The stator cooling device according to claim 1, wherein the radial ventilation channel further comprises a ventilation ring groove (115) disposed at an axial middle portion of the hollow tube (110), the ventilation ring groove (115) communicates the hollow tube (110) with a radial outer side of the stator support, the stator support comprises a stator wind collecting cavity (514) communicating with the outside, and the stator wind collecting cavity (514) can communicate with the radial outer side of the stator support through a core return channel (513) between circumferentially adjacent hollow tubes (110).

4. The stator cooling device according to claim 1, wherein the stator frame further comprises an annular wind collecting chamber (522), the annular wind collecting chamber (522) extends along a circumferential direction of the stator frame (10), the annular wind collecting chamber (522) is disposed at an axial middle portion of the hollow pipe (110), and the connector channel (521) of the hollow pipe (110) is communicated with the annular wind collecting chamber (522) through the ventilation ring groove (115) so that the plurality of connector channels (521) are communicated with each other.

5. The stator cooling device according to claim 4, wherein the iron core comprises punching sheets and spacing bars (183) which are alternately arranged, each punching sheet comprises a pair of long punching sheets (182) and short punching sheets (181), the radial inner edge of each long punching sheet (182) abuts against the side ring plate (132) of the annular air collecting cavity (522), at least one iron core air removing channel (523) is arranged between each pair of long punching sheets (182), the annular air collecting cavity (522) is communicated with the radial outer side space of the stator bracket through the iron core air removing channel (523), and the short punching sheets (181) are arranged on the outer sides of the pair of long punching sheets (182).

6. The stator cooling arrangement according to any one of claims 3-5, characterized in that the stator frame (10) comprises a main support ring plate (170) and a pair of inclined support plates (120), the main support ring plate (170) is cylindrical, the pair of inclined support plates (120) extend obliquely from the axial ends of the main support ring plate (170) to the radial outside, the stator wind-collecting chamber (514) is located between the main support ring plate (170) and the pair of inclined support plates (120), and the radial outer edges of the inclined support plates (120) are provided with connector receiving holes (122) for receiving the hollow tubes (110).

7. The stator cooling device according to claim 6, wherein the inclined support plate (120) is provided with inclined plate ventilation holes (121), and the stator air collection chamber (514) is communicated with the outside through the inclined plate ventilation holes (121).

8. The stator cooling arrangement according to any one of claims 3-7, characterized in that the stator frame (10) further comprises a channel ring plate (131) and a pair of side ring plates (132) located at both axial ends of the channel ring plate (131), the radially inner sides of the side ring plates (132) being fixed to both axial ends of the channel ring plate (131), the radially outer sides of the side ring plates (132) extending to the radially outer sides of the hollow tubes (110), the annular wind collecting chamber (522) being located between the channel ring plate (131) and the pair of side ring plates (132).

9. A stator cooling arrangement according to claim 8, characterised in that the channel ring plate (131) is located radially inside the hollow tube (110).

10. The stator cooling arrangement according to claim 8, characterized in that the stator frame (10) further comprises a middle partition plate (140), the middle partition plate (140) extends in the radial direction of the stator frame (10) to be supported between the channel ring plate (131) and the main support ring plate (170), the middle partition plate (140) is located at the axial middle of the main support ring plate (170), and partition plate through holes (141) are provided on the middle partition plate (140) to communicate with the stator wind collecting chambers (514) located at both sides of the middle partition plate (140).

11. The stator cooling arrangement of claim 7, wherein the stator frame (10) further comprises a stiffener (150), the stiffener (150) being connected between the main support ring plate (170) and the angled support plate (120).

12. An electrical machine, characterized in that the electrical machine comprises a stator, a rotor and a ventilation system, the rotor is rotatably sleeved on the periphery of the stator, the outer surface of the stator is separated from the inner surface of the stator by an annular air gap (512), the stator comprises a core (180), a winding (190) and the stator cooling device according to any one of claims 1-11, the core (180) is fixed on the hollow pipe (110), the winding (190) is wound on the core (180), and the hollow pipe (110) is communicated with the ventilation system.

13. The electrical machine according to claim 12, wherein the ventilation system comprises a bracket-side cavity (532) between the axially inner side of the stator bracket (10) and the rotor bracket (20), the bracket-side cavity (532) communicating with the outside through a bracket-side passage (531), the bracket-side passage (531) penetrating both axial ends of the stator bracket (10), the bracket-side cavity (532) communicating with the air gap (512) and/or the connector passage (521).

14. A wind park according to claim 12 or 13, characterized in that it comprises an electric machine according to claim 12 or 13.