Stator base for improving stator cooling effect of permanent magnet wind power motor

Abstract

The invention discloses a stator base for improving the cooling effect of a permanent magnet wind power motor stator, and belongs to the field of wind power generation. The stator base comprises a central flange connected to a fixed shaft, a supporting ring plate is fixed to the central flange, a first ring plate is arranged on one side of the supporting ring plate, a second ring plate is arranged on the other side of the supporting ring plate, and an annular cone plate is connected to the first ring plate; a fourth annular plate is connected between the first annular plate and the supporting annular plate, a conical annular plate is connected between the fourth annular plate and the supporting annular plate, a fifth annular plate and a sixth annular plate are connected between the second annular plate and the supporting annular plate, and a first connecting annular plate, a second connecting annular plate and a third annular plate are arranged on the outer side of the second annular plate. An air inlet pipeline is connected between the supporting ring plate and the second ring plate, and an air outlet pipeline is connected between the second ring plate and the third ring plate. According to the invention, the difference of the air volume of the ventilating duct of the stator iron core can be greatly reduced, so that each iron core section and the stator coil at each iron core section can be cooled by more sufficient and uniform air, and the cooling effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation equipment, and in particular to a stator base for improving the cooling effect of a permanent magnet wind power motor stator. Background Art

[0002] The speed of low-speed permanent magnet wind turbine motors is low, only about 10r / min, and the pressure generated by the rotating parts is only a few Pa, which cannot drive the air to flow inside the motor to remove the loss of motor operation. At present, special fans are usually used as the main pressure source for air flow. For large-capacity permanent magnet low-speed wind turbine motors, the iron core is longer, and the iron core radial ventilation method is adopted. After the cooling air passes through the stator, it enters the air gap and diffuses to both ends of the iron core. Finally, through the stator winding end and the ventilation duct, the iron core is longer, and the ventilation path for the part that directly cools the stator is long. In addition, due to structural limitations, it is generally impossible to evenly arrange fans around the base. As a result, due to the uneven circumferential temperature distribution of the stator coil and the iron core, the circumferential temperature difference can reach 30K-40K, which makes it difficult to further increase the electromagnetic load and affect the economy of the motor. Especially for high-altitude large-capacity permanent magnet low-speed wind turbine motors, the low air density further limits the increase of the motor electromagnetic load.

[0003] A Chinese patent document with publication number CN102332780A and publication date January 25, 2012 discloses a wind turbine generator, which is provided with a rotor and a stator frame that cooperate with each other, and a circular annular air gap is formed between the rotor and the stator frame. A circle of annular groove bodies is provided on the outer circumferential surface of the stator frame, baffles are provided on both sides of the annular groove body, and vertical rib plates are provided inside along the axial direction of the stator, dividing the annular groove body into a plurality of ventilation cavities, which are cold air cavities or hot air cavities. The cold air cavities and the hot air cavities are alternately arranged on the outer circumferential surface of the stator frame, and the bottoms thereof are respectively connected with cold air supply ducts and hot air output ducts.

[0004] The wind turbine disclosed in the patent document has a compact structure and realizes cooling under low air volume conditions, thereby reducing the cooling air volume requirement. However, the air volume of the stator core ventilation duct varies greatly, and each core segment and the stator coil in each core segment cannot be adequately cooled by air, which affects the cooling effect. Summary of the invention

[0005] In order to overcome the defects of the above-mentioned prior art, the present invention provides a stator frame for improving the cooling effect of the stator of a permanent magnet wind turbine. The present invention can greatly reduce the difference in air volume in the stator core ventilation duct, so that each core segment and the stator coil at each core segment can obtain more sufficient and uniform air cooling, thereby improving the cooling effect.

[0006] The present invention is achieved through the following technical solutions: A stator base for improving the cooling effect of a permanent magnet wind turbine stator, comprising a non-driving end air inlet space, a driving end air inlet space, a first rib plate, a second rib plate and a center flange connected to a fixed shaft, a support ring plate is fixed on the center flange, a first ring plate is arranged on one side of the support ring plate, a second ring plate is arranged on the other side of the support ring plate, the first ring plate and the support ring plate are fixedly connected through the first rib plate, the second ring plate and the support ring plate are fixedly connected through the second rib plate, an annular cone plate is connected to the first ring plate, a fourth ring plate is connected between the first ring plate and the support ring plate, and the fourth ring plate A conical ring plate is connected to the support ring plate, a fifth ring plate and a sixth ring plate are connected between the second ring plate and the support ring plate, a first connecting ring plate, a second connecting ring plate and a third ring plate are arranged on the outer side of the second ring plate, one end of the first connecting ring plate is fixedly connected to the second ring plate, the other end of the first connecting ring plate is fixedly connected to the third ring plate, one end of the second connecting ring plate is fixedly connected to the second ring plate, the other end of the second connecting ring plate is fixedly connected to the third ring plate, an air inlet duct is connected between the support ring plate and the second ring plate, and an air outlet duct is connected between the second ring plate and the third ring plate; The support ring plate, the second ring plate, the fifth ring plate and the second rib plate form a first cavity, the second ring plate, the third ring plate, the first connecting ring plate and the second connecting ring plate form a second cavity, the support ring plate, the second ring plate, the fifth ring plate and the sixth ring plate form a third cavity, the first ring plate, the support ring plate, the fourth ring plate and the first rib plate form a fourth cavity, the support ring plate, the fourth ring plate and the conical ring plate form a fifth cavity, the first cavity and the fourth cavity correspond to each other in circumferential position and are separated from each other by the support ring plate; the first ring plate is provided with a first ventilation channel, the second ring plate is provided with a second ventilation channel, the first ventilation channel and the second ventilation channel are arranged at intervals along the circumference, so that the drive end The air inlet space can be connected with the fourth cavity evenly distributed on the circumference at intervals, and the first cavity evenly distributed on the circumference can be connected with the non-driving end air inlet space at intervals; the fourth ring plate is provided with a first radial ventilation hole, and the fifth ring plate is provided with a second radial ventilation hole, and the first radial ventilation hole and the second radial ventilation hole are arranged at intervals along the circumference; the non-driving end air inlet space is connected with the second cavity through the third ventilation channel, the second cavity is connected with the driving end air inlet space through the air inlet duct, the air outlet cavity of the first cavity is connected with the third cavity, the air outlet cavity of the fourth cavity is connected with the fifth cavity, and the fourth ventilation channels are evenly arranged along the circumference on the support ring plate, so that the fifth cavity and the third cavity are connected, and the third cavity is connected to the outside through the air outlet duct.

[0007] The first ring plate is provided with a plurality of first ventilation channels, and the plurality of first ventilation channels are evenly arranged along the circumference of the first ring plate.

[0008] The second ring plate is provided with a plurality of second ventilation holes, and the projection positions of the second ventilation holes and the first ventilation holes on the first ring plate on the circumference are the same.

[0009] The fourth ring plate is evenly provided with a plurality of first radial ventilation holes, and the first radial ventilation holes are arranged at intervals from the first ventilation channels.

[0010] The fifth ring plate is provided with a plurality of second radial ventilation holes, and the second radial ventilation holes are arranged at intervals from the second ventilation channels.

[0011] The first connecting ring plate is provided with a plurality of third ventilation channels, and the plurality of third ventilation channels are evenly arranged along the circumference of the first connecting ring plate.

[0012] The number of the air outlet ducts is 6 to 8, and the number of the air inlet ducts is two or three times the number of the air outlet ducts.

[0013] There are multiple first cavities, and the multiple first cavities are evenly distributed along the outer circumference of the stator base.

[0014] There are multiple fourth cavities, which are evenly distributed along the outer circumference of the stator frame, and the fourth cavities correspond to the first cavities.

[0015] The support ring plate is provided with a plurality of fourth ventilation channels, and the plurality of fourth ventilation channels are evenly distributed along the circumference of the support ring plate.

[0016] The beneficial effects of the present invention are mainly manifested in the following aspects: 1. Compared with the prior art, the present invention can greatly reduce the difference in air volume of the stator core ventilation duct, so that each core segment and the stator coil at each core segment can obtain more sufficient and uniform air cooling, thereby improving the cooling effect.

[0017] 2. In the present invention, the stator frame constructs a cooling passage for the wind turbine motor, thus ensuring sufficient cooling of the end copper ring.

[0018] 3. The present invention provides favorable conditions for the uniform distribution of subsequent air inlets and outlets, which is beneficial for more uniform dispersion of cooling air on the circumference and for ensuring ventilation and cooling effects.

[0019] Fourth, the present invention can reduce the stator temperature difference and improve the cooling air utilization efficiency, thereby adapting to the unfavorable conditions of lower air density in high-altitude areas.

[0020] 5. In the present invention, the overall structure of the stator frame is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementations, wherein: Figure 1 A longitudinal sectional view of a stator frame of the present invention; Figure 2 For the present invention Figure 1 AA view in; Figure 3 For the present invention Figure 1 BB view in; Figure 4 For the present invention Figure 1 CC view in; Figure 5 It is a structural schematic diagram of the stator frame of the present invention; Markings in the figure: 1. center flange, 2. first rib plate, 3. second rib plate, 4. supporting ring plate, 5. first ring plate, 6. second ring plate, 7. annular cone plate, 8. fourth ring plate, 9. conical ring plate, 10. fifth ring plate, 11. sixth ring plate, 12. first connecting ring plate, 13. second connecting ring plate, 14. third ring plate, 15. air inlet duct, 16. air outlet duct, 17. first cavity, 18. second cavity, 19. third cavity, 20. fourth cavity, 21. fifth cavity, 22. first ventilation channel, 23. second ventilation channel, 24. first radial ventilation hole, 25. second radial ventilation hole, 26. third ventilation channel, 27. fourth ventilation channel, 28. non-driving end air inlet space, 29. driving end air inlet space. DETAILED DESCRIPTION

[0022] Example 1 See also Figure 1-Figure 4 A stator base for improving the cooling effect of a permanent magnet wind turbine stator, comprising a non-driving end air inlet space 28, a driving end air inlet space 29, a first rib plate 2, a second rib plate 3 and a center flange 1 connected to a fixed shaft, a support ring plate 4 is fixed on the center flange 1, a first ring plate 5 is arranged on one side of the support ring plate 4, a second ring plate 6 is arranged on the other side of the support ring plate 4, the first ring plate 5 and the support ring plate 4 are fixedly connected through the first rib plate 2, the second ring plate 6 and the support ring plate 4 are fixedly connected through the second rib plate 3, an annular cone plate 7 is connected to the first ring plate 5, a fourth ring plate 8 is connected between the first ring plate 5 and the support ring plate 4, and the fourth ring plate 8 and the support ring plate 4 are connected. A conical ring plate 9 is connected between the second ring plate 6 and the support ring plate 4, a fifth ring plate 10 and a sixth ring plate 11 are connected between the second ring plate 6 and the support ring plate 4, a first connecting ring plate 12, a second connecting ring plate 13 and a third ring plate 14 are arranged on the outer side of the second ring plate 6, one end of the first connecting ring plate 12 is fixedly connected to the second ring plate 6, the other end of the first connecting ring plate 12 is fixedly connected to the third ring plate 14, one end of the second connecting ring plate 13 is fixedly connected to the second ring plate 6, the other end of the second connecting ring plate 13 is fixedly connected to the third ring plate 14, an air inlet duct 15 is connected between the support ring plate 4 and the second ring plate 6, and an air outlet duct 16 is connected between the second ring plate 6 and the third ring plate 14; The support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the second rib plate 3 form a first cavity 17, the second ring plate 6, the third ring plate 14, the first connecting ring plate 12 and the second connecting ring plate 13 form a second cavity 18, the support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the sixth ring plate 11 form a third cavity 19, the first ring plate 5, the support ring plate 4, the fourth ring plate 8 and the first rib plate 2 form a fourth cavity 20, the support ring plate 4, the fourth ring plate 8 and the conical ring plate 9 form a fifth cavity 21, the first cavity 17 and the fourth cavity 20 correspond to each other in circumferential positions and are separated from each other by the support ring plate 4; the first ring plate 5 is provided with a first ventilation channel 22, the second ring plate 6 is provided with a second ventilation channel 23, the first ventilation channel 22 and the second ventilation channel 23 are arranged at intervals along the circumference, so that the drive end The air inlet space 29 can be connected to the fourth cavity 20 evenly distributed on the circumference at intervals, and the first cavity 17 evenly distributed on the circumference can be connected to the non-driving end air inlet space 28 at intervals; the fourth ring plate 8 is provided with a first radial ventilation hole 24, and the fifth ring plate 10 is provided with a second radial ventilation hole 25, and the first radial ventilation hole 24 and the second radial ventilation hole 25 are arranged at intervals along the circumference; the non-driving end air inlet space 28 is connected to the second cavity 18 through the third ventilation channel 26, and the second cavity 18 is connected to the driving end air inlet space 29 through the air inlet pipe 15, the air outlet cavity of the first cavity 17 is connected to the third cavity 19, and the air outlet cavity of the fourth cavity 20 is connected to the fifth cavity 21, and the fourth ventilation channel 27 is evenly arranged along the circumference on the support ring plate 4, so that the fifth cavity 21 is connected to the third cavity 19, and the third cavity 19 is connected to the outside through the air outlet pipe 16.

[0023] This embodiment is the most basic implementation method. Compared with the prior art, it can greatly reduce the difference in air volume in the stator core ventilation duct, so that each core segment and the stator coil at each core segment can obtain more sufficient and uniform air cooling, thereby improving the cooling effect.

[0024] Example 2 See also Figure 1-Figure 5A stator base for improving the cooling effect of a permanent magnet wind turbine stator, comprising a non-driving end air inlet space 28, a driving end air inlet space 29, a first rib plate 2, a second rib plate 3 and a center flange 1 connected to a fixed shaft, a support ring plate 4 is fixed on the center flange 1, a first ring plate 5 is arranged on one side of the support ring plate 4, a second ring plate 6 is arranged on the other side of the support ring plate 4, the first ring plate 5 and the support ring plate 4 are fixedly connected through the first rib plate 2, the second ring plate 6 and the support ring plate 4 are fixedly connected through the second rib plate 3, an annular cone plate 7 is connected to the first ring plate 5, a fourth ring plate 8 is connected between the first ring plate 5 and the support ring plate 4, and the fourth ring plate 8 and the support ring plate 4 are connected. A conical ring plate 9 is connected between the second ring plate 6 and the support ring plate 4, a fifth ring plate 10 and a sixth ring plate 11 are connected between the second ring plate 6 and the support ring plate 4, a first connecting ring plate 12, a second connecting ring plate 13 and a third ring plate 14 are arranged on the outer side of the second ring plate 6, one end of the first connecting ring plate 12 is fixedly connected to the second ring plate 6, the other end of the first connecting ring plate 12 is fixedly connected to the third ring plate 14, one end of the second connecting ring plate 13 is fixedly connected to the second ring plate 6, the other end of the second connecting ring plate 13 is fixedly connected to the third ring plate 14, an air inlet duct 15 is connected between the support ring plate 4 and the second ring plate 6, and an air outlet duct 16 is connected between the second ring plate 6 and the third ring plate 14; The support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the second rib plate 3 form a first cavity 17, the second ring plate 6, the third ring plate 14, the first connecting ring plate 12 and the second connecting ring plate 13 form a second cavity 18, the support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the sixth ring plate 11 form a third cavity 19, the first ring plate 5, the support ring plate 4, the fourth ring plate 8 and the first rib plate 2 form a fourth cavity 20, the support ring plate 4, the fourth ring plate 8 and the conical ring plate 9 form a fifth cavity 21, the first cavity 17 and the fourth cavity 20 correspond to each other in circumferential positions and are separated from each other by the support ring plate 4; the first ring plate 5 is provided with a first ventilation channel 22, the second ring plate 6 is provided with a second ventilation channel 23, the first ventilation channel 22 and the second ventilation channel 23 are arranged at intervals along the circumference, so that the drive end The air inlet space 29 can be connected to the fourth cavity 20 evenly distributed on the circumference at intervals, and the first cavity 17 evenly distributed on the circumference can be connected to the non-driving end air inlet space 28 at intervals; the fourth ring plate 8 is provided with a first radial ventilation hole 24, and the fifth ring plate 10 is provided with a second radial ventilation hole 25, and the first radial ventilation hole 24 and the second radial ventilation hole 25 are arranged at intervals along the circumference; the non-driving end air inlet space 28 is connected to the second cavity 18 through the third ventilation channel 26, and the second cavity 18 is connected to the driving end air inlet space 29 through the air inlet pipe 15, the air outlet cavity of the first cavity 17 is connected to the third cavity 19, and the air outlet cavity of the fourth cavity 20 is connected to the fifth cavity 21, and the fourth ventilation channel 27 is evenly arranged along the circumference on the support ring plate 4, so that the fifth cavity 21 is connected to the third cavity 19, and the third cavity 19 is connected to the outside through the air outlet pipe 16.

[0025] Preferably, a plurality of first ventilation channels 22 are formed on the first ring plate 5 , and the plurality of first ventilation channels 22 are evenly arranged along the circumference of the first ring plate 5 .

[0026] The second ring plate 6 is provided with a plurality of second ventilation channels 23 , and the projection positions of the second ventilation channels 23 and the first ventilation channels 22 on the first ring plate 5 on the circumference are the same.

[0027] This embodiment is a preferred implementation mode. The stator frame constructs a cooling passage for the wind turbine generator, which ensures sufficient cooling of the end copper ring.

[0028] Example 3 See also Figure 1-Figure 5A stator base for improving the cooling effect of a permanent magnet wind turbine stator, comprising a non-driving end air inlet space 28, a driving end air inlet space 29, a first rib plate 2, a second rib plate 3 and a center flange 1 connected to a fixed shaft, a support ring plate 4 is fixed on the center flange 1, a first ring plate 5 is arranged on one side of the support ring plate 4, a second ring plate 6 is arranged on the other side of the support ring plate 4, the first ring plate 5 and the support ring plate 4 are fixedly connected through the first rib plate 2, the second ring plate 6 and the support ring plate 4 are fixedly connected through the second rib plate 3, an annular cone plate 7 is connected to the first ring plate 5, a fourth ring plate 8 is connected between the first ring plate 5 and the support ring plate 4, and the fourth ring plate 8 and the support ring plate 4 are connected. A conical ring plate 9 is connected between the second ring plate 6 and the support ring plate 4, a fifth ring plate 10 and a sixth ring plate 11 are connected between the second ring plate 6 and the support ring plate 4, a first connecting ring plate 12, a second connecting ring plate 13 and a third ring plate 14 are arranged on the outer side of the second ring plate 6, one end of the first connecting ring plate 12 is fixedly connected to the second ring plate 6, the other end of the first connecting ring plate 12 is fixedly connected to the third ring plate 14, one end of the second connecting ring plate 13 is fixedly connected to the second ring plate 6, the other end of the second connecting ring plate 13 is fixedly connected to the third ring plate 14, an air inlet duct 15 is connected between the support ring plate 4 and the second ring plate 6, and an air outlet duct 16 is connected between the second ring plate 6 and the third ring plate 14; The support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the second rib plate 3 form a first cavity 17, the second ring plate 6, the third ring plate 14, the first connecting ring plate 12 and the second connecting ring plate 13 form a second cavity 18, the support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the sixth ring plate 11 form a third cavity 19, the first ring plate 5, the support ring plate 4, the fourth ring plate 8 and the first rib plate 2 form a fourth cavity 20, the support ring plate 4, the fourth ring plate 8 and the conical ring plate 9 form a fifth cavity 21, the first cavity 17 and the fourth cavity 20 correspond to each other in circumferential positions and are separated from each other by the support ring plate 4; the first ring plate 5 is provided with a first ventilation channel 22, the second ring plate 6 is provided with a second ventilation channel 23, the first ventilation channel 22 and the second ventilation channel 23 are arranged at intervals along the circumference, so that the drive end The air inlet space 29 can be connected to the fourth cavity 20 evenly distributed on the circumference at intervals, and the first cavity 17 evenly distributed on the circumference can be connected to the non-driving end air inlet space 28 at intervals; the fourth ring plate 8 is provided with a first radial ventilation hole 24, and the fifth ring plate 10 is provided with a second radial ventilation hole 25, and the first radial ventilation hole 24 and the second radial ventilation hole 25 are arranged at intervals along the circumference; the non-driving end air inlet space 28 is connected to the second cavity 18 through the third ventilation channel 26, and the second cavity 18 is connected to the driving end air inlet space 29 through the air inlet pipe 15, the air outlet cavity of the first cavity 17 is connected to the third cavity 19, and the air outlet cavity of the fourth cavity 20 is connected to the fifth cavity 21, and the fourth ventilation channel 27 is evenly arranged along the circumference on the support ring plate 4, so that the fifth cavity 21 is connected to the third cavity 19, and the third cavity 19 is connected to the outside through the air outlet pipe 16.

[0029] The first ring plate 5 is provided with a plurality of first ventilation channels 22 , and the plurality of first ventilation channels 22 are evenly arranged along the circumference of the first ring plate 5 .

[0030] The second ring plate 6 is provided with a plurality of second ventilation channels 23 , and the projection positions of the second ventilation channels 23 and the first ventilation channels 22 on the first ring plate 5 on the circumference are the same.

[0031] The fourth ring plate 8 is evenly provided with a plurality of first radial ventilation holes 24 , and the first radial ventilation holes 24 are spaced apart from the first ventilation channels 22 .

[0032] The fifth ring plate 10 is provided with a plurality of second radial ventilation holes 25 , and the second radial ventilation holes 25 are arranged at intervals from the second ventilation channels 23 .

[0033] This embodiment is another preferred implementation method, which provides favorable conditions for the uniform distribution of subsequent air inlets and outlets, helps to disperse the cooling air more evenly on the circumference, and helps to ensure the ventilation and cooling effect.

[0034] Example 4 See also Figure 1-Figure 5 A stator base for improving the cooling effect of a permanent magnet wind turbine stator, comprising a non-driving end air inlet space 28, a driving end air inlet space 29, a first rib plate 2, a second rib plate 3 and a center flange 1 connected to a fixed shaft, a support ring plate 4 is fixed on the center flange 1, a first ring plate 5 is arranged on one side of the support ring plate 4, a second ring plate 6 is arranged on the other side of the support ring plate 4, the first ring plate 5 and the support ring plate 4 are fixedly connected through the first rib plate 2, the second ring plate 6 and the support ring plate 4 are fixedly connected through the second rib plate 3, an annular cone plate 7 is connected to the first ring plate 5, a fourth ring plate 8 is connected between the first ring plate 5 and the support ring plate 4, and the fourth ring plate 8 and the support ring plate 4 are connected. A conical ring plate 9 is connected between the second ring plate 6 and the support ring plate 4, a fifth ring plate 10 and a sixth ring plate 11 are connected between the second ring plate 6 and the support ring plate 4, a first connecting ring plate 12, a second connecting ring plate 13 and a third ring plate 14 are arranged on the outer side of the second ring plate 6, one end of the first connecting ring plate 12 is fixedly connected to the second ring plate 6, the other end of the first connecting ring plate 12 is fixedly connected to the third ring plate 14, one end of the second connecting ring plate 13 is fixedly connected to the second ring plate 6, the other end of the second connecting ring plate 13 is fixedly connected to the third ring plate 14, an air inlet duct 15 is connected between the support ring plate 4 and the second ring plate 6, and an air outlet duct 16 is connected between the second ring plate 6 and the third ring plate 14; The support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the second rib plate 3 form a first cavity 17, the second ring plate 6, the third ring plate 14, the first connecting ring plate 12 and the second connecting ring plate 13 form a second cavity 18, the support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the sixth ring plate 11 form a third cavity 19, the first ring plate 5, the support ring plate 4, the fourth ring plate 8 and the first rib plate 2 form a fourth cavity 20, the support ring plate 4, the fourth ring plate 8 and the conical ring plate 9 form a fifth cavity 21, the first cavity 17 and the fourth cavity 20 correspond to each other in circumferential positions and are separated from each other by the support ring plate 4; the first ring plate 5 is provided with a first ventilation channel 22, the second ring plate 6 is provided with a second ventilation channel 23, the first ventilation channel 22 and the second ventilation channel 23 are arranged at intervals along the circumference, so that the drive end The air inlet space 29 can be connected to the fourth cavity 20 evenly distributed on the circumference at intervals, and the first cavity 17 evenly distributed on the circumference can be connected to the non-driving end air inlet space 28 at intervals; the fourth ring plate 8 is provided with a first radial ventilation hole 24, and the fifth ring plate 10 is provided with a second radial ventilation hole 25, and the first radial ventilation hole 24 and the second radial ventilation hole 25 are arranged at intervals along the circumference; the non-driving end air inlet space 28 is connected to the second cavity 18 through the third ventilation channel 26, and the second cavity 18 is connected to the driving end air inlet space 29 through the air inlet pipe 15, the air outlet cavity of the first cavity 17 is connected to the third cavity 19, and the air outlet cavity of the fourth cavity 20 is connected to the fifth cavity 21, and the fourth ventilation channel 27 is evenly arranged along the circumference on the support ring plate 4, so that the fifth cavity 21 is connected to the third cavity 19, and the third cavity 19 is connected to the outside through the air outlet pipe 16.

[0035] The first ring plate 5 is provided with a plurality of first ventilation channels 22 , and the plurality of first ventilation channels 22 are evenly arranged along the circumference of the first ring plate 5 .

[0036] The second ring plate 6 is provided with a plurality of second ventilation channels 23 , and the projection positions of the second ventilation channels 23 and the first ventilation channels 22 on the first ring plate 5 on the circumference are the same.

[0037] Further preferably, a plurality of first radial ventilation holes 24 are evenly formed on the fourth ring plate 8 , and the first radial ventilation holes 24 and the first ventilation channels 22 are arranged at intervals.

[0038] The fifth ring plate 10 is provided with a plurality of second radial ventilation holes 25 , and the second radial ventilation holes 25 are arranged at intervals from the second ventilation channels 23 .

[0039] The first connecting ring plate 12 is provided with a plurality of third ventilation channels 26 , and the plurality of third ventilation channels 26 are evenly arranged along the circumference of the first connecting ring plate 12 .

[0040] There are six air outlet ducts 16 , and the number of air inlet ducts 15 is twice the number of air outlet ducts 16 .

[0041] There are multiple first cavities 17, and the multiple first cavities 17 are evenly distributed along the outer circumference of the stator frame.

[0042] This embodiment is another preferred implementation mode, which can reduce the stator temperature difference and improve the cooling air utilization efficiency, thereby adapting to the unfavorable conditions of lower air density in high altitude areas.

[0043] Example 5 See also Figure 1-Figure 5 A stator base for improving the cooling effect of a permanent magnet wind turbine stator, comprising a non-driving end air inlet space 28, a driving end air inlet space 29, a first rib plate 2, a second rib plate 3 and a center flange 1 connected to a fixed shaft, a support ring plate 4 is fixed on the center flange 1, a first ring plate 5 is arranged on one side of the support ring plate 4, a second ring plate 6 is arranged on the other side of the support ring plate 4, the first ring plate 5 and the support ring plate 4 are fixedly connected through the first rib plate 2, the second ring plate 6 and the support ring plate 4 are fixedly connected through the second rib plate 3, an annular cone plate 7 is connected to the first ring plate 5, a fourth ring plate 8 is connected between the first ring plate 5 and the support ring plate 4, and the fourth ring plate 8 and the support ring plate 4 are connected. A conical ring plate 9 is connected between the second ring plate 6 and the support ring plate 4, a fifth ring plate 10 and a sixth ring plate 11 are connected between the second ring plate 6 and the support ring plate 4, a first connecting ring plate 12, a second connecting ring plate 13 and a third ring plate 14 are arranged on the outer side of the second ring plate 6, one end of the first connecting ring plate 12 is fixedly connected to the second ring plate 6, the other end of the first connecting ring plate 12 is fixedly connected to the third ring plate 14, one end of the second connecting ring plate 13 is fixedly connected to the second ring plate 6, the other end of the second connecting ring plate 13 is fixedly connected to the third ring plate 14, an air inlet duct 15 is connected between the support ring plate 4 and the second ring plate 6, and an air outlet duct 16 is connected between the second ring plate 6 and the third ring plate 14; The support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the second rib plate 3 form a first cavity 17, the second ring plate 6, the third ring plate 14, the first connecting ring plate 12 and the second connecting ring plate 13 form a second cavity 18, the support ring plate 4, the second ring plate 6, the fifth ring plate 10 and the sixth ring plate 11 form a third cavity 19, the first ring plate 5, the support ring plate 4, the fourth ring plate 8 and the first rib plate 2 form a fourth cavity 20, the support ring plate 4, the fourth ring plate 8 and the conical ring plate 9 form a fifth cavity 21, the first cavity 17 and the fourth cavity 20 correspond to each other in circumferential positions and are separated from each other by the support ring plate 4; the first ring plate 5 is provided with a first ventilation channel 22, the second ring plate 6 is provided with a second ventilation channel 23, the first ventilation channel 22 and the second ventilation channel 23 are arranged at intervals along the circumference, so that the drive end The air inlet space 29 can be connected to the fourth cavity 20 evenly distributed on the circumference at intervals, and the first cavity 17 evenly distributed on the circumference can be connected to the non-driving end air inlet space 28 at intervals; the fourth ring plate 8 is provided with a first radial ventilation hole 24, and the fifth ring plate 10 is provided with a second radial ventilation hole 25, and the first radial ventilation hole 24 and the second radial ventilation hole 25 are arranged at intervals along the circumference; the non-driving end air inlet space 28 is connected to the second cavity 18 through the third ventilation channel 26, and the second cavity 18 is connected to the driving end air inlet space 29 through the air inlet pipe 15, the air outlet cavity of the first cavity 17 is connected to the third cavity 19, and the air outlet cavity of the fourth cavity 20 is connected to the fifth cavity 21, and the fourth ventilation channel 27 is evenly arranged along the circumference on the support ring plate 4, so that the fifth cavity 21 is connected to the third cavity 19, and the third cavity 19 is connected to the outside through the air outlet pipe 16.

[0044] The first ring plate 5 is provided with a plurality of first ventilation channels 22 , and the plurality of first ventilation channels 22 are evenly arranged along the circumference of the first ring plate 5 .

[0045] The second ring plate 6 is provided with a plurality of second ventilation channels 23 , and the projection positions of the second ventilation channels 23 and the first ventilation channels 22 on the first ring plate 5 on the circumference are the same.

[0046] The fourth ring plate 8 is evenly provided with a plurality of first radial ventilation holes 24 , and the first radial ventilation holes 24 are spaced apart from the first ventilation channels 22 .

[0047] The fifth ring plate 10 is provided with a plurality of second radial ventilation holes 25 , and the second radial ventilation holes 25 are arranged at intervals from the second ventilation channels 23 .

[0048] The first connecting ring plate 12 is provided with a plurality of third ventilation channels 26 , and the plurality of third ventilation channels 26 are evenly arranged along the circumference of the first connecting ring plate 12 .

[0049] There are eight air outlet ducts 16 , and the number of air inlet ducts 15 is three times the number of air outlet ducts 16 .

[0050] There are multiple first cavities 17, and the multiple first cavities 17 are evenly distributed along the outer circumference of the stator frame.

[0051] There are multiple fourth cavities 20 , which are evenly distributed along the outer circumference of the stator frame. The fourth cavity 20 corresponds to the first cavity 17 .

[0052] The support ring plate 4 is provided with a plurality of fourth ventilation channels 27 , and the plurality of fourth ventilation channels 27 are evenly distributed along the circumference of the support ring plate 4 .

[0053] This embodiment is the best implementation method, and the overall structure of the stator frame is simple and easy to implement.

[0054] The cooling air flow process of the present invention is as follows: After the wind turbine is assembled, the cooling air is divided into two paths in the non-drive end air inlet space 28 .

[0055] While cooling the non-driving end of the stator coil and the copper ring, the air enters the air inlet cavity of the first cavity 17 through the second ventilation channel 23, passes through the iron core radial ventilation channel distributed on the circumference of the air inlet cavity of the first cavity 17 to the air gap, passes through the iron core radial ventilation channel distributed on the circumference of the air outlet cavity of the first cavity 17, enters the air outlet cavity of the first cavity 17, and then enters the third cavity 19 through the second radial ventilation hole 25; Another route enters the second cavity 18 through the third ventilation channel 26, then enters the drive end air inlet space 29 through the air inlet duct 15, and then bypasses the conical ring plate 9. While cooling the end of the stator coil drive end, it enters the air inlet cavity of the fourth cavity 20 through the first ventilation channel 22 on the first ring plate 5, and passes through the iron core radial ventilation channel distributed on the circumference of the air inlet cavity of the fourth cavity 20 to the air gap, and then passes through the iron core radial ventilation channel distributed on the circumference of the air outlet cavity of the fourth cavity 20 to enter the air outlet cavity of the fourth cavity 20, and then enters the fifth cavity 21 through the first radial ventilation hole 24, and then enters the third cavity 19 through the fourth ventilation channel 27 on the support ring plate 4.

[0056] At this point, the two winds converge into the third cavity 19 and pass through the air outlet duct 16 connected to the second ring plate 6 to the air outlet.

Claims

1. A stator frame for improving the cooling effect of a permanent magnet wind turbine stator, comprising a central flange (1) connected to a stator shaft, characterized in that: The invention also comprises a non-driving end air inlet space (28), a driving end air inlet space (29), a first rib plate (2) and a second rib plate (3); a supporting ring plate (4) is fixed on the central flange (1); a first ring plate (5) is arranged on one side of the supporting ring plate (4); a second ring plate (6) is arranged on the other side of the supporting ring plate (4); the first ring plate (5) and the supporting ring plate (4) are fixedly connected via the first rib plate (2); the second ring plate (6) and the supporting ring plate (4) are fixedly connected via the second rib plate (3); an annular cone plate (7) is connected to the first ring plate (5); a fourth ring plate (8) is connected between the first ring plate (5) and the supporting ring plate (4); a cone plate (9) is connected between the fourth ring plate (8) and the supporting ring plate (4); and the second ring plate (5) is connected to the supporting ring plate (4). A fifth ring plate (10) and a sixth ring plate (11) are connected between the support ring plate (6) and the support ring plate (4); a first connecting ring plate (12), a second connecting ring plate (13) and a third ring plate (14) are arranged on the outer side of the second ring plate (6); one end of the first connecting ring plate (12) is fixedly connected to the second ring plate (6); the other end of the first connecting ring plate (12) is fixedly connected to the third ring plate (14); one end of the second connecting ring plate (13) is fixedly connected to the second ring plate (6); the other end of the second connecting ring plate (13) is fixedly connected to the third ring plate (14); an air inlet duct (15) is connected between the support ring plate (4) and the second ring plate (6); and an air outlet duct (16) is connected between the second ring plate (6) and the third ring plate (14); The support ring plate (4), the second ring plate (6), the fifth ring plate (10) and the second rib plate (3) form a first cavity (17); the second ring plate (6), the third ring plate (14), the first connecting ring plate (12) and the second connecting ring plate (13) form a second cavity (18); the support ring plate (4), the second ring plate (6), the fifth ring plate (10) and the sixth ring plate (11) form a third cavity (19); the first ring plate (5), the support ring plate (4), the fourth ring plate (8) and the first The rib plate (2) forms a fourth cavity (20), the support ring plate (4), the fourth ring plate (8) and the conical ring plate (9) form a fifth cavity (21), the first cavity (17) and the fourth cavity (20) correspond to each other in circumferential positions and are separated from each other by the support ring plate (4); the first ring plate (5) is provided with a first ventilation channel (22), the second ring plate (6) is provided with a second ventilation channel (23), and the first ventilation channel (22) and the second ventilation channel (23) are spaced apart along the circumference. The drive-end air inlet space (29) is arranged so that the drive-end air inlet space (29) and the fourth cavity (20) evenly distributed on the circumference can be connected at intervals, and the first cavity (17) evenly distributed on the circumference can be connected at intervals with the non-drive-end air inlet space (28); the fourth ring plate (8) is provided with a first radial ventilation hole (24), the fifth ring plate (10) is provided with a second radial ventilation hole (25), and the first radial ventilation hole (24) and the second radial ventilation hole (25) are arranged at intervals along the circumference; the non-drive-end air inlet space (28) is connected to the third ventilation hole (24) through the third ventilation hole (25). The hole (26) is connected to the second cavity (18), the second cavity (18) is connected to the drive end air inlet space (29) through the air inlet duct (15), the air outlet cavity of the first cavity (17) is connected to the third cavity (19), the air outlet cavity of the fourth cavity (20) is connected to the fifth cavity (21), and the fourth ventilation holes (27) are evenly arranged along the circumference of the support ring plate (4) so ​​that the fifth cavity (21) and the third cavity (19) are connected, and the third cavity (19) is connected to the outside through the air outlet duct (16).

2. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 1, characterized in that: The first ring plate (5) is provided with a plurality of first ventilation channels (22), and the plurality of first ventilation channels (22) are evenly arranged along the circumference of the first ring plate (5).

3. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 2, characterized in that: The second ring plate (6) is provided with a plurality of second ventilation holes (23), and the second ventilation holes (23) and the first ventilation holes (22) on the first ring plate (5) have the same projection position on the circumference.

4. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 2, characterized in that: The fourth ring plate (8) is evenly provided with a plurality of first radial ventilation holes (24), and the first radial ventilation holes (24) and the first ventilation channels (22) are arranged at intervals.

5. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 3, characterized in that: The fifth ring plate (10) is provided with a plurality of second radial ventilation holes (25), and the second radial ventilation holes (25) are arranged at intervals from the second ventilation channels (23).

6. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 1, characterized in that: The first connecting ring plate (12) is provided with a plurality of third ventilation channels (26), and the plurality of third ventilation channels (26) are evenly arranged along the circumference of the first connecting ring plate (12).

7. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 1, characterized in that: The number of the air outlet ducts (16) is 6 to 8, and the number of the air inlet ducts (15) is twice or three times the number of the air outlet ducts (16).

8. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 1, characterized in that: There are a plurality of the first cavities (17), and the plurality of first cavities (17) are evenly distributed along the outer circumference of the stator base.

9. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 1, characterized in that: There are a plurality of the fourth cavities (20), and the plurality of fourth cavities (20) are evenly distributed along the outer circumference of the stator base, and the fourth cavities (20) correspond to the first cavities (17).

10. The stator base for improving the cooling effect of the stator of a permanent magnet wind turbine according to claim 1, characterized in that: The support ring plate (4) is provided with a plurality of fourth ventilation channels (27), and the plurality of fourth ventilation channels (27) are evenly distributed along the circumference of the support ring plate (4).

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