Variable speed pumped storage generator motor with double stack cooling radial plenum ventilation system

Abstract

The present invention discloses a variable-speed pumped-storage generator motor with a double-stack cooling radial pressurized ventilation system, which relates to the field of motors. To address the high magnetic flux density and temperature rise issues of existing pumped-storage generator motors, the present invention comprises stator stack ventilation grooves within the stator core, solid cores between adjacent stator stack ventilation grooves in the axial and circumferential directions, and stator windings in contact with the stator stack ventilation grooves. A rotor stack ventilation groove is within the rotor core, solid cores between adjacent rotor stack ventilation grooves in the axial and circumferential directions, and rotor windings in contact with the rotor stack ventilation grooves. Pressurized ventilation channel steel is installed within the rotor stack ventilation grooves. Axial ventilation ducts and radial ventilation holes are provided within the rotor jacket. Rotor radial air guide plates and rotor axial segmented air guide plates are alternately installed on the rotating shaft along the circumferential direction. Three-layer centrifugal fans are installed on both sides of the rotor radial air guide plates. The present invention improves motor performance and cooling efficiency, has a simple structure, and is easy to implement.

Description

Technical field:

[0001] The invention relates to a variable-speed pumped-storage power generation motor with a double-stack cooling radial pressurization ventilation system, belonging to the field of motors. Background technology:

[0002] Large-capacity variable-speed pumped-storage power stations can provide sufficient active power support and certain peak-shaving and frequency-regulating capabilities for the power system. Large-capacity variable-speed pumped-storage generator motors, the core equipment within variable-speed pumped-storage power stations, change the unit's operating speed by adjusting the operating frequency of the rotor current, which can expand the pump-turbine operating head-to-lift ratio range and achieve optimal performance indicators. As the capacity of variable-speed pumped-storage generator motors increases, the magnetic flux density, losses, and temperature rise of the various components within the generator motors increase significantly. An unreasonable ventilation and cooling system for variable-speed pumped-storage generators can lead to low cooling gas utilization and excessive temperatures in the stator core, stator windings, rotor core, rotor windings, and end components, and even burn out the winding insulation, seriously threatening the safe and stable operation of large-capacity variable-speed pumped-storage generator motors.

[0003] In order to effectively solve the problems of high temperature of components inside large-capacity variable-speed pumped-storage generator motors and low utilization rate of cooling gas and materials, a variable-speed pumped-storage generator motor with a double-stack cooling radial pressurized ventilation system can be used. This can effectively improve the electromagnetic performance and power density of large-capacity variable-speed pumped-storage generator motors, increase the total fluid flow rate inside the variable-speed pumped-storage generator motor, accelerate the fluid flow rate around each component, improve the utilization rate of cooling gas, significantly reduce the temperature of the stator area and the rotor area, further reduce the thermal stress and temperature difference of the stator winding and the rotor winding in the axial direction, and ensure that the large-capacity variable-speed pumped-storage generator motor can operate safely and reliably for a long time. Summary of the invention:

[0004] The purpose of the present invention is to provide a variable-speed pumped-storage generator motor with a double-stack cooling radial pressurization ventilation system to solve the problem of high temperatures of the stator core, stator winding, rotor core, rotor winding and end components in a large-capacity variable-speed pumped-storage generator motor, improve the magnetic field distribution in the generator motor, reduce the loss of the stator core and rotor core, increase the total flow rate of cooling gas in the stator and rotor cores, and improve the utilization rate of the cooling gas. The double-stack cooling radial pressurization ventilation system can effectively reduce the maximum temperature of each component in the variable-speed pumped-storage generator motor, thereby improving the ability of the large-capacity variable-speed pumped-storage generator motor to operate stably.

[0005] The variable speed pumped storage generator motor with a double stack cooling radial pressurized ventilation system of the present invention comprises a stator core, a stator winding, a stator stack ventilation groove, a pressurized ventilation channel steel, a stator positioning rib, a pressure finger, a stator pressure plate, a rotor core, a rotor winding, a rotor stack ventilation groove, a rotor pressure plate, a rotor three-layer centrifugal fan, a rotor sleeve, an axial ventilation duct, radial ventilation holes, a gradient radial ventilation duct, a rotor radial air guide plate, a rotor axial segmented air guide plate, heat conducting teeth, a rotating shaft, a heat dissipation fin and a groove; the width of each stator stack ventilation groove in the axial direction is equal, and the width of each rotor stack ventilation groove in the axial direction is equal; the rotor three-layer centrifugal fan is composed of an inner centrifugal layer. The invention consists of a centrifugal fan, a middle-layer centrifugal fan and an outer-layer centrifugal fan; a stator stacked ventilation groove is provided in the stator core, and solid core is provided between adjacent stator stacked ventilation grooves in the axial and circumferential directions, and the stator winding is in contact with the stator stacked ventilation groove; a rotor stacked ventilation groove is provided in the rotor core, and solid core is provided between adjacent rotor stacked ventilation grooves in the axial and circumferential directions, and the rotor winding is in contact with the rotor stacked ventilation groove; a pressurized ventilation channel steel is installed in the rotor stacked ventilation groove, an axial ventilation duct and radial ventilation holes are provided in the rotor jacket, a rotor radial air guide plate and a rotor axial segmented air guide plate are alternately installed on the rotating shaft along the circumferential direction, and a rotor three-layer centrifugal fan is installed on both sides of the rotor radial air guide plate.

[0006] The width of the stator stacked ventilation grooves is 3mm to 9mm; the width of the rotor stacked ventilation grooves is 3mm to 9mm; the width of the solid iron core between the stator stacked ventilation grooves in the axial direction is 5mm to 30mm; the length of the solid iron core between the stator stacked ventilation grooves in the circumferential direction is 20mm to 50mm; the inlet width of the gradient radial ventilation duct is 3mm to 7mm; the outlet width of the gradient radial ventilation duct is 8mm to 15mm; the number of inner-layer centrifugal fans in the circumferential direction is 5-10; the number of middle-layer centrifugal fans in the circumferential direction is 10-20; the number of outer-layer centrifugal fans in the circumferential direction is 20-40.

[0007] Preferably, the outer surface of the stator pressure plate is provided with heat dissipation fins, which can further reduce the temperature of the stator pressure plate.

[0008] Preferably, the outer surface of the rotor pressure plate is provided with grooves, which increases the contact area between the cooling gas and the rotor pressure plate and further reduces the temperature of the rotor pressure plate.

[0009] Preferably, heat-conducting teeth are installed at the tooth tops of the rotor stacked ventilation grooves, which can effectively take away the heat of the rotor core and further reduce the temperature of the rotor core.

[0010] Advantages of the present invention: The electromagnetic performance and cooling effect of the traditional large-capacity variable-speed pumped-storage generator motor cannot be fully utilized, resulting in a large volume of the variable-speed pumped-storage generator motor, a large consumption of iron and copper materials, and a high cost. In addition, the temperature of the stator winding, stator core, rotor winding, rotor core and end components is high, and the total air volume and cooling gas utilization rate are low. The patent of the present invention is to open a stator stacked ventilation groove in the solid stator core of the variable-speed pumped-storage generator motor, open a rotor stacked ventilation groove in the solid rotor core, add a supercharged ventilation channel steel in the rotor stacked ventilation groove, add a three-layer rotor centrifugal fan on both sides of the rotor radial air guide plate, add a sheath radial ventilation hole in the rotor sheath, and open a gradient radial ventilation duct in the solid stator pressure plate, thereby forming a variable-speed pumped-storage generator motor with a double-stacked cooling radial supercharged ventilation system. A variable-speed pumped-storage generator motor with a double-stack cooling radial plenum ventilation system effectively improves magnetic field distribution, reduces the maximum magnetic flux density within the stator and rotor cores, and reduces losses in the stator and rotor cores, further shortening the axial length of the generator motor and enhancing its electromagnetic performance. The stator windings and rotor windings, respectively, are in contact with stator-stack ventilation grooves and rotor-stack ventilation grooves. This concentrated airflow removes heat from the stator and rotor windings, where heat generation is most severe, effectively reducing their peak temperatures. The three-layer rotor centrifugal fan, rotor axial segmented air guides, and rotor radial air guides significantly increase the total flow rate in the generator motor's end and straight sections, accelerating fluid flow around the stator core, stator windings, rotor core, rotor windings, and end components, effectively reducing their temperatures and improving cooling gas utilization. The variable-speed pumped-storage generator motor with a double-stack cooling radial pressurization ventilation system described in the present invention can effectively improve the distribution of the magnetic field, reduce the losses of the stator core and the rotor core, enhance the cooling effect in the entire spatial area of ​​the generator motor, reduce the maximum temperature of each component, further reduce the thermal stress and temperature difference in the axial direction of the stator area and the rotor area, save materials, reduce processing and manufacturing costs, have higher reliability, and are easy to implement. Description of the drawings:

[0011] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and accompanying drawings.

[0012] Figure 1 A three-dimensional diagram of the stator region of the variable-speed pumped-storage generator motor with a double-stacked cooling radial plenum ventilation system according to the present invention;

[0013] Figure 2A three-dimensional diagram of the rotor region of the variable-speed pumped-storage generator motor with a double-stacked cooling radial plenum ventilation system according to the present invention;

[0014] Figure 3 This is a side axial cross-sectional view of the variable-speed pumped-storage generator motor with a double-stack cooling radial pressurization ventilation system according to the present invention;

[0015] Figure 4 This is an axial cross-sectional view from the other side of the variable-speed pumped-storage generator motor with a double-stack cooling radial pressurization ventilation system according to the present invention;

[0016] Figure 5 An axial cross-sectional view of the rotating shaft and the rotor axial segmented air guide plate of the variable-speed pumped-storage generator motor with a double-stack cooling radial pressurization ventilation system according to the present invention;

[0017] Figure 6 This is an axial cross-sectional view of the pressurized ventilation channel steel in the variable-speed pumped-storage generator motor with a double-stacked cooling radial pressurized ventilation system according to the present invention;

[0018] Figure 7 This is an axial cross-sectional view of a three-rotor centrifugal fan in a variable-speed pumped-storage generator motor with a double-stack cooling radial pressurization ventilation system according to the present invention;

[0019] Figure 8 A top view of a rotor radial air guide plate and a rotor axial segmented air guide plate in a variable-speed pumped-storage generator motor with a double-stack cooling radial pressurization ventilation system according to the present invention;

[0020] Figure 9 A top view of a rotor casing in a variable-speed pumped-storage generator motor with a double-stack cooling radial plenum ventilation system according to the present invention;

[0021] Figure 10 An axial cross-sectional view of a variable-speed pumped-storage generator motor with a double-stack cooling radial pressure-boosting ventilation system according to a second embodiment of the present invention;

[0022] Figure 11 An axial cross-sectional view of a variable-speed pumped-storage generator motor with a double-stack cooling radial pressure-boosting ventilation system according to a third embodiment of the present invention;

[0023] Figure 12 This is a partial enlarged view of the rotor core of a variable-speed pumped-storage generator motor with a double-stack cooling radial pressurization ventilation system according to a fourth embodiment of the present invention;

[0024] In the figure: 1- stator core, 2- stator winding, 3- stator stacked ventilation grooves, 4- pressurized ventilation channel steel, 5- stator locating ribs, 6- pressure fingers, 7- stator pressure plate, 8- rotor core, 9- rotor winding, 10- rotor stacked ventilation grooves, 11- rotor pressure plate, 12- rotor three-layer centrifugal fan, 13- rotor jacket, 14- axial ventilation ducts, 15- radial ventilation holes, 16- gradient radial ventilation ducts, 17- rotor radial air guide plates, 18- rotor axial segmented air guide plates, 19- heat transfer teeth, 20- rotating shaft, 21- cooling fins, and 22- grooves. The arrows in the figure indicate the flow direction of cooling gas in a variable-speed pumped-storage generator motor with a double-stack cooling radial pressurized ventilation system. Specific implementation method:

[0025] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0026] Specific implementation method 1: Combination Figures 1 to 9 The present embodiment is described. The variable speed pumped storage generator motor with double stack cooling radial pressurized ventilation system described in the present embodiment comprises a stator core 1, a stator winding 2, a stator stack ventilation groove 3, a pressurized ventilation channel steel 4, a stator positioning rib 5, a pressure finger 6, a stator pressure plate 7, a rotor core 8, a rotor winding 9, a rotor stack ventilation groove 10, a rotor pressure plate 11, a rotor three-layer centrifugal fan 12, a rotor sleeve 13, an axial ventilation duct 14, radial ventilation holes 15, a gradient radial ventilation duct 16, a rotor radial air guide plate 17, a rotor axial segmented air guide plate 18, a heat conducting tooth 19, a rotating shaft 20, a heat dissipation fin 21 and a groove 22; the width of each stator stack ventilation groove 3 is equal in the axial direction, and the width of each rotor stack ventilation groove 10 is equal in the axial direction; the rotor three-layer centrifugal fan 12 is composed of The invention comprises an inner centrifugal fan 12-1, a middle centrifugal fan 12-2 and an outer centrifugal fan 12-3; a stator stacked ventilation groove 3 is provided in the stator core 1, and solid cores are arranged between adjacent stator stacked ventilation grooves 3 in the axial and circumferential directions; the stator winding 2 is in contact with the stator stacked ventilation groove 3; a rotor stacked ventilation groove 10 is provided in the rotor core 8, and solid cores are arranged between adjacent rotor stacked ventilation grooves 10 in the axial and circumferential directions; the rotor winding 9 is in contact with the rotor stacked ventilation groove 10; a pressurized ventilation channel steel 4 is installed in the rotor stacked ventilation groove 10; an axial ventilation duct 14 and a radial ventilation hole 15 are provided in the rotor sleeve 13; a rotor radial air guide plate 17 and a rotor axial segmented air guide plate 18 are alternately arranged on the rotating shaft 20 along the circumferential direction; and a rotor three-layer centrifugal fan 12 is installed on both sides of the rotor radial air guide plate 17.

[0027] The width of the stator stacked ventilation groove 3 is 3mm to 9mm, and is 5mm in this embodiment; the width of the rotor stacked ventilation groove 10 is 3mm to 9mm, and is 5mm in this embodiment; the width of the solid iron core between the stator stacked ventilation grooves 3 in the axial direction is 5mm to 30mm, and is 8mm in this embodiment; the length of the solid iron core between the stator stacked ventilation grooves 3 in the circumferential direction is 20mm to 50mm, and is 30mm in this embodiment; the inlet width of the gradual radial ventilation duct 16 is 3 mm to 7mm, and is taken as 5mm in this embodiment; the outlet width of the gradual radial ventilation duct 16 is 8mm to 15mm, and is taken as 9mm in this embodiment; the number of inner-layer centrifugal fans 12-1 in the circumferential direction is 5-10, and is taken as 8 in this embodiment; the number of middle-layer centrifugal fans 12-2 in the circumferential direction is 10-20, and is taken as 16 in this embodiment; the number of outer-layer centrifugal fans 12-3 in the circumferential direction is 20-40, and is taken as 32 in this embodiment.

[0028] A stator stacked ventilation groove 3 is opened in the solid stator core 1 of the original variable-speed pumped-storage generator motor, and a solid core is formed between adjacent stator stacked ventilation grooves 3 in the axial direction and the circumferential direction. A rotor stacked ventilation groove 10 is opened in the original solid rotor core 8, and a solid core is formed between adjacent rotor stacked ventilation grooves 10 in the axial direction and the circumferential direction. A boosted ventilation channel steel 4 is newly added in the rotor stacked ventilation groove 10, and a rotor three-layer centrifugal fan 12 is newly added on both sides of the original rotor radial air guide plate. The rotor radial air guide plate originally installed on the outer surface of the rotating shaft is adjusted to a rotor radial air guide plate 17 and a rotor axial segmented air guide plate 18 alternately installed on the outer surface of the rotating shaft along the circumferential direction. A sheath radial ventilation hole 15 is newly added in the original rotor sheath 13, and a gradient radial ventilation duct 16 is opened in the original solid stator pressure plate 7. Since there is a solid iron core between adjacent stator stacked ventilation grooves 3 in the axial direction and the circumferential direction, and there is a solid iron core between adjacent rotor stacked ventilation grooves 10 in the axial direction and the circumferential direction, the effective iron core in the stator region and the rotor region of the generator motor with the same axial length is greater than the effective iron core in the stator region and the rotor region of the traditional generator motor, further reducing the axial length of the stator core 1 and the rotor core 8, improving the magnetic field distribution in the generator motor, reducing the maximum magnetic density value in the stator core 1 and the rotor core 8, and reducing the loss of the stator core 1 and the rotor core 8. In terms of ventilation and cooling, when the rotor of the variable-speed pumped-storage generator motor rotates, the cooling gas enters the interior of the generator motor from both sides of the variable-speed pumped-storage generator motor. All the cooling gas directly enters the three-layer centrifugal fan 12 of the rotor under the action of the rotor radial wind guide plate 17. Under the action of the inner centrifugal fan 12-1, the middle centrifugal fan 12-2 and the outer centrifugal fan 12-3, the pressure and flow of the cooling gas increase successively. The cooling gas with higher pressure and flow flows out of the three-layer centrifugal fan 12 of the rotor and enters the rotor end area, which accelerates the fluid flow speed around the rotor end winding and the rotor pressure plate 11, increases the surface heat dissipation coefficient of the rotor end winding and the rotor pressure plate 11, and effectively reduces the temperature of the rotor end winding and the rotor pressure plate 11. This path of cooling gas flows out from the axial ventilation duct 14 of the sleeve and the radial ventilation holes 15 of the sleeve, wherein the cooling gas flowing out from the radial ventilation holes 15 of the sleeve enters the stator end area, speeds up the fluid velocity around the stator end winding, effectively takes away the heat of the stator end winding, further reduces the temperature of the stator end winding, and the cooling gas passing through the stator end winding enters the gradual radial ventilation duct 16 in the stator pressure plate 7, further increases the contact area between the cooling gas and the stator pressure plate 7, improves the surface heat dissipation coefficient of the stator pressure plate 7, effectively reduces the temperature of the stator pressure plate 7 which generates serious heat, and finally flows out from the outlet of the stator end area.The pressure of the other cooling gas is first increased by the action of the rotor axial segmented air guide plates 18, and then further increased by the action of the rotor radial air guide plates 17. The high-pressure cooling gas enters the rotor stacked ventilation grooves 10 inside the rotor core 8. The cooling gas pressure continues to increase under the action of the boosted ventilation channel steel 4 inside the rotor stacked ventilation grooves 10, thereby further increasing the flow rate of the cooling gas, accelerating the flow rate of the cooling gas in the rotor core 8, and significantly reducing the temperature of the rotor core 8. Since the rotor winding 9 is in contact with the rotor stacked ventilation grooves 10, the contact area between the cooling gas and the rotor winding 9 is increased, accelerating the fluid velocity around the rotor winding 9, and significantly reducing the temperature of the rotor winding 9, which is seriously overheated. The cooling gas flowing out of the rotor stack ventilation groove 10 exits and enters the stator stack ventilation groove 3 within the stator core 1 through the air gap. The stator winding 2 contacts the stator stack ventilation groove 3, significantly increasing the contact area between the cooling gas and the stator core 1 and stator winding 2. This improves the surface heat dissipation coefficient of the stator core 1 and stator winding 2, effectively reducing the temperature of the stator core 1 and stator winding 2. This cooling gas flows out of the stator stack ventilation groove 3 exit. After the two cooling gas flows merge, they enter the interior of the variable-speed pumped-storage generator motor from both sides, thus forming a double-stack cooling radial boost ventilation system for the variable-speed pumped-storage generator motor. The variable-speed pumped-storage generator motor with a double-stack cooling radial pressurized ventilation system can significantly improve the magnetic field distribution inside the generator motor, increase the power density of the generator motor, further reduce the axial length and volume of the generator motor, improve the electromagnetic performance of the generator motor and the utilization rate of the cooling gas, significantly reduce the temperature of the stator core, stator winding, rotor core, rotor winding and end components, and enhance the ability of the variable-speed pumped-storage generator motor to operate safely and reliably.

[0029] Specific implementation method 2: Combination Figure 10 This embodiment is described. The difference between this embodiment and the first embodiment is that heat dissipation fins 21 are installed on the outer surface of the stator pressure plate 7 to further reduce the temperature of the stator pressure plate 7. Other components and connection relationships are the same as those of the first embodiment.

[0030] Specific implementation method three: Combination Figure 11 This embodiment differs from the first embodiment in that a groove 22 is provided on the outer surface of the rotor pressure plate 11, increasing the contact area between the cooling gas and the rotor pressure plate 11 and further reducing the temperature of the rotor pressure plate 11. The remaining components and connections are the same as those of the first embodiment.

[0031] Specific implementation method four: Combination Figure 12This embodiment differs from the first embodiment in that heat-conducting teeth 19 are installed at the tooth tips of the rotor stacked ventilation grooves 10, effectively removing heat from the rotor core 8 and further reducing the temperature of the rotor core 8. The remaining components and connections are the same as those of the first embodiment.

[0032] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable speed pumped storage generator motor with a double stack cooling radial plenum ventilation system, characterized in that: The invention comprises a stator core (1), a stator winding (2), a stator stacked ventilation groove (3), a pressurized ventilation channel steel (4), a stator positioning rib (5), a pressure finger (6), a stator pressure plate (7), a rotor core (8), a rotor winding (9), a rotor stacked ventilation groove (10), a rotor pressure plate (11), a rotor three-layer centrifugal fan (12), a rotor sleeve (13), an axial ventilation duct (14), radial ventilation holes (15), a gradual radial ventilation duct (16), a rotor radial air guide plate (17), a rotor axial segmented air guide plate (18), heat-conducting teeth (19), a rotating shaft (20), a heat dissipation fin (21) and a groove (22); the width of each stator stacked ventilation groove (3) is equal in the axial direction, and the width of each rotor stacked ventilation groove (10) is equal in the axial direction; the rotor three-layer centrifugal fan (12) is composed of an inner layer centrifugal fan (12-1), a middle layer centrifugal fan (12-2), and a heat-conducting tooth (19). The invention is composed of a fan (12-2) and an outer centrifugal fan (12-3); a stator core (1) is provided with a stator stacked ventilation groove (3), and solid cores are provided between adjacent stator stacked ventilation grooves (3) in the axial direction and the circumferential direction; the stator winding (2) is in contact with the stator stacked ventilation grooves (3); a rotor core (8) is provided with a rotor stacked ventilation groove (10), and solid cores are provided between adjacent rotor stacked ventilation grooves (10) in the axial direction and the circumferential direction; the rotor winding (2) is in contact with the stator stacked ventilation grooves (3); The group (9) is in contact with the rotor stacked ventilation groove (10), a pressurized ventilation channel steel (4) is installed in the rotor stacked ventilation groove (10), an axial ventilation duct (14) and a radial ventilation hole (15) are opened in the rotor jacket (13), a rotor radial air guide plate (17) and a rotor axial segmented air guide plate (18) are alternately installed on the rotating shaft (20) along the circumferential direction, and a rotor three-layer centrifugal fan (12) is installed on both sides of the rotor radial air guide plate (17).

2. The variable speed pumped storage generator motor with double-stack cooling radial pressure-boosting ventilation system according to claim 1, characterized in that: The width of the stator stacked ventilation groove (3) is 3mm to 9mm; the width of the rotor stacked ventilation groove (10) is 3mm to 9mm; the width of the solid iron core between the stator stacked ventilation grooves (3) in the axial direction is 5mm to 30mm; the length of the solid iron core between the stator stacked ventilation grooves (3) in the circumferential direction is 20mm to 50mm; the inlet width of the gradual radial ventilation duct (16) is 3mm to 7mm; the outlet width of the gradual radial ventilation duct (16) is 8mm to 15mm; the number of inner layer centrifugal fans (12-1) in the circumferential direction is 5-10; the number of middle layer centrifugal fans (12-2) in the circumferential direction is 10-20; and the number of outer layer centrifugal fans (12-3) in the circumferential direction is 20-40.

3. The variable speed pumped storage generator motor with double stack cooling radial pressure boost ventilation system according to claim 1, characterized in that: The outer surface of the stator pressure plate (7) is provided with heat dissipation fins (21).

4. The variable speed pumped storage generator motor with double stack cooling radial pressure boost ventilation system according to claim 1, characterized in that: A groove (22) is provided on the outer surface of the rotor pressure plate (11).

5. The variable speed pumped storage generator motor with double stack cooling radial pressure boost ventilation system according to claim 1, characterized in that: Heat-conducting teeth (19) are installed at the tooth tops of the rotor stacked ventilation grooves (10).

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