CN110798020B - Axial and radial staggered cooling type variable-speed pumped storage generator motor with double fans - Google Patents
Axial and radial staggered cooling type variable-speed pumped storage generator motor with double fans Download PDFInfo
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- CN110798020B CN110798020B CN201911238853.8A CN201911238853A CN110798020B CN 110798020 B CN110798020 B CN 110798020B CN 201911238853 A CN201911238853 A CN 201911238853A CN 110798020 B CN110798020 B CN 110798020B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
- H02K9/18—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
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Abstract
The invention discloses a shaft radial staggered cooling type variable-speed pumped storage generator motor with double fans, and relates to the field of motors. The invention aims to solve the problem of high temperature of the existing variable-speed pumped storage generator motor, a stator ventilation channel is arranged in a stator core, a stator inner-cooling ventilation channel is arranged at the tooth top of a part of the stator core close to the end part of a motor, a staggered rotor ventilation channel is arranged in a rotor core, booster-type air guide steel is arranged in the staggered rotor ventilation channel, the outlet of the staggered rotor ventilation channel corresponds to the inlet of the stator ventilation channel and the inlet of the stator inner-cooling ventilation channel, a rotor radial air guide plate is positioned below the rotor core, a rotor centrifugal large fan and a rotor auxiliary cooling small fan are positioned at two sides of the rotor core, a rotating shaft is provided with a plurality of stages of fan moving blades, a bracket is provided with a plurality of stages of fan static blades, and a surrounding. The invention enhances the cooling effect of the generator motor component, has simple structure and is convenient to realize.
Description
Technical Field
The invention relates to a shaft radial staggered cooling type variable-speed pumped storage generator motor with double fans, belonging to the field of motors.
Background
In order to effectively solve the valley filling and peak shaving tasks of the power system, the pumped storage power station plays an increasingly important role in the power system. The traditional pumped storage power station mostly adopts a pumped storage power generation motor with constant rotating speed, but the traditional pumped storage power generation motor with constant rotating speed does not work under the optimal working condition generally in the pumped storage power station with large water head change, and has the problems of increased cavitation, low efficiency, increased vibration and abrasion of a water turbine and the like. The variable-speed pumped storage generator motor has the electrical performance obviously superior to that of the traditional constant-speed pumped storage generator motor, the actual rotating speed of a unit is changed by adjusting the working frequency of the rotor current, and the operating head and lift ratio range of the water pump turbine is enlarged, so that the optimal operating performance index is obtained. However, the large-capacity variable-speed pumped storage generator motor has large capacity and has the problem of high temperature rise of the generator motor, so that the safety and the reliability of the operation of the large-capacity variable-speed pumped storage generator motor are threatened.
In order to effectively reduce the problem of overhigh temperature of an inner stator core, a stator winding, a rotor core, a rotor winding and end components of a high-capacity variable-speed pumped storage generator motor, an axial-radial staggered cooling type ventilation circulating system with double fans can be adopted, the total fluid flow in the variable-speed pumped storage generator motor can be obviously increased, the flowing speed of cooling gas in the generator motor is obviously accelerated, the contact area of the cooling gas and each component in the generator motor is increased, the utilization rate of the cooling gas is effectively improved, the highest temperature of the inner stator core, the stator winding, the rotor core, the rotor winding and the end components of the generator motor is reduced, the temperature difference and the thermal stress in the axial direction of the generator motor are effectively reduced, and the variable-speed pumped storage generator motor can be ensured to run safely and reliably for a long time.
Disclosure of Invention
The invention aims to provide an axial and radial staggered cooling type variable-speed pumped storage generator motor with double fans, which aims to solve the problem of overhigh temperature of a stator iron core, a stator winding, a rotor iron core, a rotor winding and end components caused by unreasonable ventilation design of a stator region and a rotor region of a large-capacity variable-speed pumped storage generator motor, increase the total flow of cooling gas, improve the utilization rate of the cooling gas in the variable-speed pumped storage generator motor, effectively reduce the highest temperature of each component in the variable-speed pumped storage generator motor through an axial and radial staggered cooling type ventilation circulation system with the double fans and improve the long-term safe and stable operation capability of the large-capacity variable-speed pumped storage generator motor.
The invention relates to an axial and radial staggered cooling type variable-speed pumped storage generator motor with dual fans, which comprises a stator iron core, a stator ventilation ditch, a stator internal cooling type ventilation channel, a rotor iron core, a staggered rotor ventilation ditch, supercharged air guide steel, a rotor radial air deflector, a rotor centrifugal large fan, a rotor auxiliary cooling type small fan, a multi-stage fan moving blade, a multi-stage fan static blade, a multi-stage axial driving fan, a support, a surrounding stator cooling water channel, a cooler, a stator positioning rib, a pressure finger, a pressure plate, a stator winding, a rotor pressure plate, a hood, a rotor positioning rib, a rotating shaft, a rotor small air guide fin and a heat dissipation fin. The stator core includes stator core teeth and a stator core yoke. The multistage axial driving fan is composed of multistage fan moving blades and multistage fan stationary blades. The multistage fan moving blade comprises a first-stage moving blade, a second-stage moving blade, a third-stage moving blade and a fourth-stage moving blade. A stator ventilation ditch is arranged in a stator core, a stator inner-cooling type ventilation channel is arranged at the tooth top of a part of the stator core close to the end part of a motor, a staggered rotor ventilation ditch is arranged in a rotor core, supercharged air guide steel is installed in the staggered rotor ventilation ditch, the outlet of the staggered rotor ventilation ditch corresponds to the inlet of the stator ventilation ditch and the inlet of the stator inner-cooling type ventilation channel, a rotor radial air guide plate is located below the rotor core, a rotor centrifugal large fan and a rotor auxiliary cooling type small fan are located on two sides of the rotor core, a multi-stage fan moving blade is installed on a rotating shaft, multi-stage stationary blade fan blades are installed on a support, and a surrounding stator cooling water channel is installed at the.
The width of the stator ventilation channel is 3mm to 8 mm; the section of the surrounding stator cooling water channel is circular, and the diameter of the surrounding stator cooling water channel is 6mm to 10 mm; the number of the surrounding stator cooling water channels along the circumferential direction is 20-50; the number of the radial air deflectors of the rotor along the circumferential direction is 5-9; the number of the rotor centrifugal large fans along the circumferential direction is 10 to 18; the number of the rotor auxiliary cooling type small fans along the circumferential direction is 10-18; the cross sections of the inlet and the outlet of the stator internal cooling type ventilation duct are square, and the side length of the square is 8mm to 13 mm; the flow velocity of cooling water in the surrounding stator cooling water channel is 1m/s to 3 m/s.
Preferably, the area of the inlet of the stator ventilating duct of the variable-speed pumped storage generator motor at the middle position in the axial direction is increased by 1/4-1/2, so that the flow of cooling gas in the stator ventilating duct is effectively increased, the flow speed of the cooling gas in the stator ventilating duct is further accelerated, the capacity of the cooling gas for taking away the heat of the stator core is improved, and the temperature of the stator core is further reduced.
Preferably, the stator core tooth tops are all provided with the stator inner-cooling type ventilation ducts 3, so that the utilization rate of cooling gas is improved, the cooling effect of the stator core tooth tops is enhanced, and the temperature of the stator core tooth tops is further reduced.
Preferably, the rotor small-sized wind guide fins are additionally arranged on the rotating shaft, so that the flow rate and the flow velocity of the cooling gas are further improved, the capability of the cooling gas for taking away heat of each component is enhanced, and the highest temperature of each component is further reduced.
Preferably, the heat dissipation fins are additionally arranged on the pressing plate, so that the contact area between the cooling gas and the pressing plate is increased, the capability of the cooling gas for taking away the heat of the pressing plate is improved, and the temperature of the pressing plate which generates heat seriously is further reduced.
The invention has the advantages that: the temperature of the inner stator core, the stator winding, the rotor core, the rotor winding and the end part components of the large-capacity variable-speed pumped storage generator motor is higher, and the utilization rate of cooling gas in the traditional variable-speed pumped storage generator motor is lower. The invention discloses a double-pressure booster type fan motor, which is characterized in that a multi-stage axial driving fan is additionally arranged on a rotating shaft, the newly added multi-stage axial driving fan and an original radial driving fan form a double-pressure booster type driving fan, a stator inner cooling type ventilation channel is arranged at the tooth top of a part of a solid stator core close to the end part of a motor, an original rotor core with the same width is adjusted into a rotor core with different widths, a surrounding stator cooling water channel is additionally arranged in a yoke part of the solid stator core, and a cooler is additionally arranged on a bracket, so that an axial and radial staggered cooling type ventilation circulating system with double fans is formed. The axial and radial staggered cooling type ventilation circulating system with the double fans can improve the total fluid flow in the variable-speed pumped storage power generation motor, obviously accelerate the flowing speed of cooling gas in the power generation motor, improve the capacity of the cooling gas for taking away the heat of the stator core, the stator winding, the rotor core, the rotor winding and the end part component, obviously reduce the highest temperature of the stator core, the stator winding, the rotor core, the rotor winding and the end part component, and reduce the axial temperature difference and the thermal stress of the variable-speed pumped storage power generation motor. The axial and radial staggered cooling type variable-speed pumped storage generator motor with the double fans can effectively enhance the cooling effect of the stator area and the rotor area, improve the utilization rate of cooling gas in the generator motor, obviously reduce the highest temperature of each component in the generator motor, save materials, reduce the cost and enhance the long-term safe and reliable operation capability of the variable-speed pumped storage generator motor.
Drawings
For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is an axial cross-sectional view of an axial radial cross-cooling variable speed pumped-storage generator motor with dual fans according to the present invention;
FIG. 2 is a circumferential cross-sectional view of a pressurized air-guiding steel in a staggered rotor air-guiding channel in an axial radial staggered cooling type variable speed pumped-storage generator motor with dual fans according to the present invention;
FIG. 3 is a circumferential cross-sectional view of a radial air deflector of a rotor in the axial radial staggered cooling type variable speed pumped storage generator motor with dual fans of the present invention;
FIG. 4 is a circumferential cross-sectional view of a rotor centrifugal type large fan in the axial radial staggered cooling type variable speed pumped-storage generator motor with dual fans of the present invention;
FIG. 5 is a circumferential cross-sectional view of a small fan with rotor-assisted cooling in an axial-radial staggered cooling variable speed pumped-storage generator motor with dual fans according to the present invention;
FIG. 6 is a partial cross-sectional view of the stator area of the axial radial cross-cooling variable speed pumped-storage generator motor with dual fans of the present invention in the circumferential direction;
FIG. 7 is an axial cross-sectional view of a variable speed pumped-storage generator motor with dual fans with axial cross cooling according to a second embodiment of the present invention;
fig. 8 is an axial cross-sectional view of a variable speed pumped-storage generator motor with dual fans with axial staggered cooling according to a third embodiment of the present invention;
fig. 9 is a circumferential cross-sectional view of a rotor radial air deflector and a rotor small air deflector in a shaft radial staggered cooling type variable speed pumped storage generator motor with dual fans according to a fourth embodiment of the present invention;
fig. 10 is an axial cross-sectional view of an axial cross-cooling variable speed pumped-storage generator motor with dual fans according to a fifth embodiment of the present invention.
In the figure: 1-stator iron core, 2-stator ventilation groove, 3-stator internal cooling type ventilation channel, 4-rotor iron core, 5-staggered rotor ventilation groove, 6-supercharged air guide steel, 7-rotor radial air guide plate, 8-rotor centrifugal large fan, 9-rotor auxiliary cooling type small fan, 10-multi-stage fan moving blade, 11-multi-stage fan stationary blade, 12-multi-stage axial driving fan and 13-bracket, 14-surrounding stator cooling water channels, 15-a cooler, 16-stator positioning ribs, 17-pressing fingers, 18-pressing plates, 19-stator windings, 20-rotor windings, 21-rotor pressing plates, 22-machine covers, 23-rotor positioning ribs, 24-rotating shafts, 25-rotor small-sized wind guide fins and 26-radiating fins. The arrows in the figure show the flow direction of cooling gas and cooling water in the axial radial staggered cooling type variable speed pumped storage generator motor with double fans.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 6, and the axial-radial staggered cooling type variable-speed pumped storage generator motor with dual fans in the present embodiment includes a stator core 1, a stator ventilation groove 2, a stator internal-cooling ventilation duct 3, a rotor core 4, a staggered rotor ventilation groove 5, a supercharged ventilation steel 6, a rotor radial air deflector 7, a rotor centrifugal large fan 8, a rotor auxiliary-cooling small fan 9, a multi-stage fan rotor blade 10, a multi-stage fan stator blade 11, a multi-stage axial driving fan 12, a bracket 13, a surrounding stator cooling water channel 14, a cooler 15, a stator positioning rib 16, a pressure finger 17, a pressure plate 18, a stator winding 19, a rotor winding 20, a rotor pressure plate 21, a housing 22, a rotor positioning rib 23, a rotating shaft 24, a rotor small ventilation fin 25, and a heat dissipation fin 26. The stator core 1 comprises stator core teeth 1-1 and stator core yokes 1-2. The multistage axial-drive fan 12 is composed of multistage fan moving blades 10 and multistage fan stationary blades 11. The multi-stage fan moving blade 10 comprises a first-stage moving blade 10-1, a second-stage moving blade 10-2, a third-stage moving blade 10-3 and a fourth-stage moving blade 10-4. Stator ventilation grooves 2 are formed in a stator iron core 1, stator inner-cooling type ventilation channels 3 are formed in the tooth tops of part of the stator iron core close to the end portion of a motor, staggered rotor ventilation grooves 5 are formed in a rotor iron core 4, booster-type air guide steel 6 is installed in the staggered rotor ventilation grooves 5, the outlets of the staggered rotor ventilation grooves 5 correspond to the inlets of the stator ventilation grooves 2 and the inlets of the stator inner-cooling type ventilation channels 3, rotor radial air guide plates 7 are located below the rotor iron core 4, a rotor centrifugal large fan 8 and a rotor auxiliary cooling type small fan 9 are located on two sides of the rotor iron core 4, a rotating shaft 24 is provided with multi-stage fan moving blades 10, a support is provided with multi-stage fan stationary blades 11, and a surrounding stator cooling water channel 14 is installed on the yoke.
The width of the stator ventilating duct 2 is 3mm to 8mm, and the width is 6mm in the embodiment; the section of the surrounding stator cooling water channel 14 is circular, the diameter is 6mm to 10mm, and the diameter is 7mm in the embodiment; the number of the surrounding stator cooling water channels 14 in the circumferential direction is 20 to 50, and 25 is adopted in the embodiment; the number of the rotor radial air deflectors 7 along the circumferential direction is 5 to 9, and the number of the rotor radial air deflectors is 7 in the embodiment; the number of the rotor centrifugal type large fans 8 along the circumferential direction is 10 to 18, and the number of the rotor centrifugal type large fans is 14 in the embodiment; the number of the rotor auxiliary cooling type small fans 9 along the circumferential direction is 10 to 18, and the number of the rotor auxiliary cooling type small fans in the embodiment is 14; the cross sections of the inlet and the outlet of the stator internal cooling type ventilation duct 3 are square, the side length of the square is 8mm to 13mm, and the square is 8mm in the embodiment; the flow velocity of the cooling water in the circular stator cooling water channel 14 is 1m/s to 3m/s, and 2m/s is taken in this embodiment.
A multi-stage fan moving blade 10 is additionally arranged on a rotating shaft 24 of an original variable-speed pumped storage power generation motor, a multi-stage fan static blade 11 is additionally arranged on a support 13, the multi-stage fan moving blade 10 and the multi-stage fan static blade 11 form a multi-stage axial driving fan 12, a first-stage moving blade 10-1, a second-stage moving blade 10-2, a third-stage moving blade 10-3 and a fourth-stage moving blade 10-4 of the multi-stage axial driving fan 12 are respectively defined as a first-stage axial supercharging area, a second-stage axial supercharging area, a third-stage axial supercharging area and a fourth-stage axial supercharging area, a newly-added multi-stage axial driving fan and an original radial driving fan form a double supercharging type driving fan, a stator inner cooling type ventilating duct 3 with a square section is arranged at the tooth crest of a part of a solid stator iron core close to the end part of a motor, and the original rotor iron core with the same, a surrounding stator cooling water channel 14 is additionally arranged at the yoke part of the solid stator core 1, and a cooler 15 is additionally arranged on the bracket. When the rotor of the variable-speed pumped storage power generation motor rotates, the multistage axial driving fan 12 drives cooling gas to rapidly flow along the axial direction, the pressure and the flow of the cooling gas can be increased step by step through a first-stage axial pressurizing area, a second-stage axial pressurizing area, a third-stage axial pressurizing area and a fourth-stage axial pressurizing area in the multistage axial driving fan 12, and one path of the cooling gas flowing out of the multistage axial driving fan 12 directly cools a rotor end winding and a stator end winding along the radial direction and then enters the cooler 15 through the support 14; the other path of cooling gas enters a rotor radial air deflector 7 along the axial direction, the cooling gas rapidly flows along the radial direction under the driving of the rotor radial air deflector 7, the pressure and the flow of the cooling gas are further increased, a part of the cooling gas flowing out of the rotor radial air deflector 7 enters the staggered rotor ventilation ditch 5 in the rotor core 4, the flowing speed of the cooling gas in the staggered rotor ventilation ditch 5 is increased, the surface heat dissipation coefficient of the rotor core 4 is improved, the heat of the rotor core 4 is effectively taken away, the temperature of the rotor core 4 is obviously reduced, the pressure and the flow of the cooling gas in the staggered rotor ventilation ditch 5 are further increased under the action of a pressurized air guide steel 6, a part of the cooling gas flowing out of an outlet of the staggered rotor ventilation ditch 5 directly enters the stator ventilation ditch 2 at the middle position of the axial direction of the generating motor, the heat of the stator core 1 and the stator winding 19 at the middle position of the generator motor in the axial direction is effectively taken away, the temperature of the stator core 1 and the stator winding 19 at the middle position of the generator motor in the axial direction is reduced, the other part of cooling gas directly enters the stator inner-cooling type ventilation channel 3 at the position of the generator motor close to the end part in the axial direction to cool the tooth top of the stator core with serious heat generation, the heat of the tooth top of the stator core at the position of the end part in the axial direction is effectively taken away, the temperature of the tooth top of the stator core is obviously reduced, the cooling gas flowing out from the outlets at two sides of the stator inner-cooling type ventilation channel 3 enters the stator ventilation channel 2, the cooling gas flows in the radial direction in the stator ventilation channel 2, the surface heat dissipation coefficients of the stator core 1 and the stator winding 19 are increased, and the temperature of the stator core 1 and the stator winding 19 at the position of the generator motor close to the end, the two parts of cooling gas can effectively reduce the temperature difference and the thermal stress in the axial direction of the generator motor, and finally the two parts of cooling gas enter the cooler 15 through the outlet of the bracket; the last path of cooling gas enters the rotor large centrifugal fan 8 and the rotor auxiliary cooling type small fan 9 along the radial direction, the flow velocity of the cooling gas is obviously increased under the action of the rotor large centrifugal fan 8 and the rotor auxiliary cooling type small fan 9, the cooling gas with the increased flow velocity reaches the rotor end winding firstly and then reaches the stator end winding, the heat of the rotor end winding and the stator end winding is effectively taken away, the temperature of the rotor end winding and the stator end winding is obviously reduced, and the path of cooling gas finally enters the cooler 15 through the outlet of the bracket; the three paths of air flow in the cooler 15 along two opposite axial directions, a plurality of cooling water pipes are arranged in the cooler 15, the heat of the air can be effectively taken away through cooling water in the cooling water pipes, the temperature of the air is obviously reduced, the air with the reduced temperature enters the multistage axial driving fans 12 on two sides of the generator motor along the radial direction, and axial and radial staggered cooling type ventilation circulation with double fans is completed. In addition, the surrounding-shaped stator cooling water channel 14 is in close contact with the yoke of the stator core 1, cooling water in the surrounding-shaped stator cooling water channel 14 can effectively take away heat of the yoke of the stator core 1, and the temperature of the yoke of the stator core 1 is obviously reduced, so that the influence of poor cooling effect of the yoke of the stator core 1 caused by the temperature rise of cooling gas is compensated. The axial and radial staggered cooling type ventilation circulating system with the double fans can effectively enhance the long-term safe and reliable running capability of the variable-speed pumped storage generator motor.
The second embodiment is as follows: the present embodiment is described with reference to fig. 7, and the difference between the present embodiment and the first embodiment is that the area of the inlet of the stator ventilation groove 2 at the middle position of the variable speed pumped storage generator motor in the axial direction is increased by 1/4 to 1/2, which effectively increases the flow rate of the cooling gas in the stator ventilation groove 2, further accelerates the flow rate of the cooling gas in the stator ventilation groove 2, improves the ability of the cooling gas to take away the heat of the stator core 1, and further lowers the temperature of the stator core 1. Other components and connection relationships are the same as those in the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 8, and the difference between the present embodiment and the first embodiment is that the stator core tooth tops are all provided with the stator internal cooling type ventilation ducts 3, so that the utilization rate of the cooling gas is improved, the cooling effect at the tooth tops of the stator core 1 is enhanced, and the temperature at the tooth tops of the stator core 1 is further reduced. Other components and connection relationships are the same as those in the first embodiment.
The fourth concrete implementation mode: the present embodiment is described with reference to fig. 9, and differs from the first embodiment in that a rotor small-sized wind guide fin 25 is added to a rotating shaft 24, thereby further increasing the flow rate and flow velocity of the cooling gas, enhancing the heat carrying capacity of the cooling gas for each component, and further reducing the maximum temperature of each component. Other components and connection relationships are the same as those in the first embodiment.
The fifth concrete implementation mode: the present embodiment is described with reference to fig. 10, and is different from the first embodiment in that the heat dissipation fins 26 are added to the platen 18, so that the contact area between the cooling gas and the platen 18 is increased, the ability of the cooling gas to carry away heat from the platen 18 is improved, and the temperature of the platen 18 that generates heat severely is further reduced. Other components and connection relationships are the same as those in the first embodiment.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. Axial radial staggered cooling type variable-speed pumped storage generator motor with double fans is characterized in that: the stator comprises a stator iron core (1), a stator ventilation groove (2), a stator internal cooling ventilation channel (3), a rotor iron core (4), a staggered rotor ventilation groove (5), supercharged air guide steel (6), a rotor radial air guide plate (7), a rotor centrifugal large fan (8), a rotor auxiliary cooling small fan (9), a multi-stage fan moving blade (10), a multi-stage fan stationary blade (11), a multi-stage axial driving fan (12), a support (13), a surrounding stator cooling water channel (14), a cooler (15), a stator positioning rib (16), a pressing finger (17), a pressing plate (18), a stator winding (19), a rotor winding (20), a rotor pressing plate (21), a hood (22), a rotor positioning rib (23), a rotating shaft (24), a rotor small air guide fin (25) and a heat dissipation fin (26), wherein the stator iron core (1) comprises stator iron core teeth (1-1) and a stator iron core yoke (1-2), the multistage axial driving fan (12) consists of multistage fan moving blades (10) and multistage fan static blades (11), the multistage fan moving blades (10) comprise first-stage moving blades (10-1), second-stage moving blades (10-2), third-stage moving blades (10-3) and fourth-stage moving blades (10-4), stator ventilating ditches (2) are formed in stator cores (1), stator inner-cooling type ventilating ducts (3) are formed at tooth tops of partial stator cores close to the end parts of a motor, staggered rotor ventilating ditches (5) are formed in rotor cores (4), booster-type air guide steel (6) are installed in the staggered rotor ventilating ditches (5), outlets of the staggered rotor ventilating ditches (5) correspond to inlets of the stator ventilating ditches (2) and the stator inner-cooling type ventilating ducts (3), and rotor radial air guide plates (7) are located below the rotor cores (4), the large centrifugal rotor fan (8) and the small auxiliary cooling rotor fan (9) are positioned on two sides of the rotor core (4), the rotating shaft (24) is provided with a plurality of stages of fan moving blades (10), the bracket is provided with a plurality of stages of fan static blades (11), and the surrounding stator cooling water channel (14) is arranged at the yoke part of the stator core (1).
2. The axial-radial stagger-cooled variable speed pumped-storage generator-motor with dual fans of claim 1 wherein: the width of the stator ventilation channel (2) is 3mm to 8 mm; the section of the surrounding stator cooling water channel (14) is circular, and the diameter of the surrounding stator cooling water channel is 6mm to 10 mm; the number of the surrounding stator cooling water channels (14) along the circumferential direction is 20 to 50; the number of the rotor radial air deflectors (7) along the circumferential direction is 5-9; the number of the rotor centrifugal large fans (8) along the circumferential direction is 10 to 18; the number of the rotor auxiliary cooling type small fans (9) along the circumferential direction is 10 to 18; the cross sections of the inlet and the outlet of the stator internal cooling type ventilation duct (3) are square, and the side length of the square is 8mm to 13 mm; the flow speed of cooling water in the annular stator cooling water channel (14) is 1m/s to 3 m/s.
3. The axial-radial stagger-cooled variable speed pumped-storage generator-motor with dual fans of claim 1 wherein: and the tooth tops of the stator iron cores are provided with stator inner-cooling type ventilation ducts (3).
4. The axial-radial stagger-cooled variable speed pumped-storage generator-motor with dual fans of claim 1 wherein: and a rotor small-sized air guide fin (25) is additionally arranged on the rotating shaft (24).
5. The axial-radial stagger-cooled variable speed pumped-storage generator-motor with dual fans of claim 1 wherein: the pressure plate (18) is additionally provided with heat dissipation fins (26).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911238853.8A CN110798020B (en) | 2019-12-06 | 2019-12-06 | Axial and radial staggered cooling type variable-speed pumped storage generator motor with double fans |
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| CN201911238853.8A CN110798020B (en) | 2019-12-06 | 2019-12-06 | Axial and radial staggered cooling type variable-speed pumped storage generator motor with double fans |
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| CN110798020B true CN110798020B (en) | 2021-01-22 |
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| EP2741397B1 (en) * | 2012-12-04 | 2015-02-11 | Siemens Aktiengesellschaft | Electric machine with combined air-water cooling |
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