CN205407494U - Permanent magnet synchronous motor assembly, compressor with permanent magnet synchronous motor assembly and air conditioner with permanent magnet synchronous motor assembly - Google Patents
Permanent magnet synchronous motor assembly, compressor with permanent magnet synchronous motor assembly and air conditioner with permanent magnet synchronous motor assembly Download PDFInfo
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- CN205407494U CN205407494U CN201620156807.9U CN201620156807U CN205407494U CN 205407494 U CN205407494 U CN 205407494U CN 201620156807 U CN201620156807 U CN 201620156807U CN 205407494 U CN205407494 U CN 205407494U
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 44
- 239000012809 cooling fluid Substances 0.000 claims abstract description 58
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 230000000930 thermomechanical effect Effects 0.000 claims description 33
- 230000004308 accommodation Effects 0.000 claims description 14
- 230000008676 import Effects 0.000 claims description 7
- 239000006200 vaporizer Substances 0.000 claims description 6
- 230000005347 demagnetization Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000007774 longterm Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Motor Or Generator Cooling System (AREA)
Abstract
The utility model provides a PMSM subassembly and have its compressor and air conditioner. A permanent magnet synchronous motor assembly comprising: a barrel having a receiving cavity; the stator is arranged in the accommodating cavity; the stator is sleeved on the outer peripheral wall of the rotor, an air gap channel communicated with the accommodating cavity is formed between the stator and the outer peripheral wall of the rotor, and a cooling fluid channel for introducing cooling fluid into the air gap channel is formed in the inner cylinder wall of the cylinder; the air return channel is arranged on the wall of the cylinder body; and the at least one cooling fluid auxiliary inlet is arranged on the cylinder wall of the cylinder body and communicated with the air gap channel. The periphery wall that causes the rotor with cooling fluid is in the department of cooling down the rotor, can cool off the middle part of the periphery wall of rotor promptly, and the cooling effect is better, has avoided the rotor long-term operation of motor to cause serious loss because of the permanent magnet demagnetization in high temperature environment.
Description
Technical field
This utility model relates to a kind of permanent magnet synchronous electric thermomechanical components and has its compressor and air-conditioner.
Background technology
Permagnetic synchronous motor has that volume is little, overall operation efficiency is high, power factor (PF) high, is often applied to the driving of compressor in recent years.Compared with transmission asynchronous starting motor, permagnetic synchronous motor adopts the permanent magnet excitation in rotor, exciting current can be avoided to cause excitation loss while producing magnetic field, it also requires adopt forced heat radiation measure to take away the heat within permagnetic synchronous motor, it is to avoid the internal rotor permanent magnet demagnetization phenomenon because causing under high-temperature work environment for a long time.Especially heavy-duty motor, winding current is big, and whole environment caloric value is obvious especially, and cooling measure must be ensured.
The type of cooling that existing permagnetic synchronous motor adopts can be divided into two kinds according to motor type, open machine is frequently with air-cooled, fan drive motor surrounding air is utilized to flow, thus being motor radiating, but this kind of structure can increase the temperature of whole environment, need to additionally increasing equipment environment to external world to dispel the heat, this structure has certain limitation；Enclosed motor employing freon etc. evaporates, non-conductive liquid cooling medium cools down, and what existing major part compressor arrangement all adopted is this kind of type of cooling.
The method conventional about the enclosed permagnetic synchronous motor type of cooling also has multiple, can be that stator two ends winding sprays cooling medium, or set up helical flow path to cool down winding hull-skin temperature at stator outer surface, but these measures are all more single, cooling effect is limited, it is only applicable to the motor of middle low power, when power of motor rises to 800KW, when 1500KW is even bigger, owing to motor length can increase a lot, traditional type of cooling is only capable of cooling two ends of rotor or stator outer surface, and it is difficult to be cooled to rotor middle part, it is easily caused internal rotor permanent magnet because causing demagnetization phenomenon under high-temperature work environment for a long time.
Utility model content
Main purpose of the present utility model is in that provide a kind of permanent magnet synchronous electric thermomechanical components and have its compressor and air-conditioner, to solve the problem that in prior art, motor inhomogeneous cooling is even.
To achieve these goals, according to an aspect of the present utility model, it is provided that a kind of permanent magnet synchronous electric thermomechanical components, including: cylinder, there is accommodation chamber；Stator, is arranged in accommodation chamber；Rotor, stator sleeve be located on the periphery wall of rotor and and the periphery wall of rotor between be formed and hold the air gap channel that chamber is connected, the inner tube wall of cylinder offers cooling fluid is introduced the cooling channels to air gap channel；Return gas channel, is opened on the barrel of cylinder；At least one cools down fluid auxiliary entrance, is opened on the barrel of cylinder and is connected with air gap channel.
Further, return gas channel is connected with air gap channel by holding chamber.
Further, accommodation chamber is separated into the first chamber and the second chamber by stator, first chamber and the second chamber are positioned at the two ends of air gap channel mutually, wherein, the import of cooling channels is arranged on the barrel of cylinder, cooling fluid auxiliary entrance is connected with the first chamber, and the outlet of cooling channels is connected with the first chamber, and return gas channel is opened on the barrel of the cylinder corresponding to the second chamber place and is connected with the second chamber.
Further, cooling channels includes: cooling fluid inlet, is opened on the barrel of cylinder；Helical duct, is opened on the internal perisporium of cylinder and extends along the circumferential and axial direction of stator, and the arrival end of helical duct is connected with cooling fluid inlet, and the port of export of helical duct is connected with air gap channel.
Further, accommodation chamber is separated into the first chamber and the second chamber, the first chamber and the second chamber and is positioned at the two ends of air gap channel mutually by stator, the tail end place of the stator that the arrival end of helical duct is disposed in proximity in the second chamber.
Further, the port of export and first chamber of helical duct are connected, and cooling fluid auxiliary entrance is connected with the first chamber.
Further, the direction of rotation of helical duct is identical with the magnetic direction that the coil of stator produces or contrary.
To achieve these goals, according to another aspect of the present utility model, additionally providing a kind of compressor, including permanent magnet synchronous electric thermomechanical components, permanent magnet synchronous electric thermomechanical components is above-mentioned permanent magnet synchronous electric thermomechanical components.
To achieve these goals, according to another aspect of the present utility model, provide again a kind of air-conditioner, including permanent magnet synchronous electric thermomechanical components, compressor, vaporizer and condenser, permanent magnet synchronous electric thermomechanical components is above-mentioned permanent magnet synchronous electric thermomechanical components, cooling channels is connected with condenser, and return gas channel is connected with the air entry of vaporizer or compressor.
Application the technical solution of the utility model, stator sleeve be located on the periphery wall of rotor and and the periphery wall of rotor between be formed and hold the air gap channel that chamber is connected, the barrel of cylinder offers cooling fluid is introduced the cooling channels to air gap channel.Cooling fluid causes the periphery wall of rotor sentence rotor is lowered the temperature, namely can be cooled to the middle part of the periphery wall of rotor.Offering at least one cooling fluid auxiliary entrance on the barrel of cylinder, cooling fluid auxiliary entrance is connected with air gap channel.Being provided with cooling fluid auxiliary entrance, cooling effect is better, it is to avoid the rotor longtime running of motor causes serious loss because permanent magnet demagnetization in hot environment.
Accompanying drawing explanation
The Figure of description constituting the part of the application is used for providing being further appreciated by of the present utility model, and schematic description and description of the present utility model is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 illustrates the sectional view according to permanent magnet synchronous electric thermomechanical components of the present utility model.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
10, cylinder；60, cooling fluid auxiliary entrance；12, cooling fluid inlet；13, helical duct；20, stator；30, rotor；40, air gap channel；11, cooling channels；50, return gas channel.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As it is shown in figure 1, this utility model provides a kind of permanent magnet synchronous electric thermomechanical components.
Specifically, permanent magnet synchronous electric thermomechanical components includes cylinder 10, stator 20, rotor 30, air gap channel 40, return gas channel 50 and cooling fluid auxiliary entrance 60.Permanent magnet synchronous electric thermomechanical components in the present embodiment includes each one of cylinder 10, stator 20 and rotor 30.Wherein, cylinder 10 has accommodation chamber.Stator 20 is arranged in accommodation chamber, and stator 20 suit of motor is fixed on the inside of cylinder 10.Stator 20 be sheathed on the periphery wall of rotor 30 and and the periphery wall of rotor 30 between be formed with air gap channel 40, air gap channel 40 is connected with holding chamber.The rotor 30 of motor is arranged on the inside of stator 20, supports cylinder 10 in front and back bearings.Offering cooling channels 11 on the barrel of cylinder 10, cooling fluid can be introduced to air gap channel 40 by cooling channels 11.Return gas channel 50 is opened on the barrel of cylinder 10, and return gas channel 50 is connected with air gap channel 40.At least one cools down fluid auxiliary entrance 60, is opened on the barrel of described cylinder 10 and is connected with described air gap channel 40.
Cooling fluid causes the periphery wall of rotor 30 sentence rotor 30 is lowered the temperature, it is to avoid rotor 30 longtime running of motor causes serious loss because permanent magnet demagnetization in hot environment.The cooling approach of this structural change cooling fluid, and then improve the type of cooling, improves the uniformity of cooling, it is ensured that with improve motor reliability of operation, be particularly well-suited to large-size motor.This utility model can solve the problem that the cooling problem of heavy-duty motor, wherein, high-power is generally referred to as the motor more than 100KW, is particularly suited for 500KW～1500KW motor in this utility model.This high power permanent magnet synchronous motor can be used for the multiple similar models such as centrifugal compressor, helical-lobe compressor, aerator.Cooling fluid for cooling down can be freon or other easy evaporation generation decalescence, nonconducting material.
Further, return gas channel 50 is connected with air gap channel 40 by holding chamber.Motor has the front end and tail end that are oppositely arranged, offers a motor gas returning port and return gas channel 50 at the tail end place of motor, and the cooling fluid of the complete motor of cooling can be made to enter next container.
It is positioned at the two ends of air gap channel 40, the first chamber and the second chamber is mutually connected as it is shown in figure 1, accommodation chamber is separated into the first chamber and the second chamber, the first chamber and the second chamber by stator 20 by air gap channel 40.Wherein, the import of cooling channels 11 is arranged on the barrel of cylinder 10.The outlet of cooling channels 11 is connected with the first chamber, and return gas channel 50 is opened on the barrel of the cylinder 10 corresponding to the second chamber place and is connected with the second chamber.Preferably, cooling fluid auxiliary entrance 60 is one, and cooling fluid auxiliary entrance 60 is connected with the first chamber.
Cooling channels 11 includes cooling fluid inlet 12 and helical duct 13.Specifically, cooling fluid inlet 12 is opened on the barrel of cylinder 10.Helical duct 13 is opened on the internal perisporium of cylinder 10, and helical duct 13 extends along the circumferential and axial direction of stator 20, and the arrival end of helical duct 13 is connected with cooling fluid inlet 12, and the port of export of helical duct 13 is connected with air gap channel 40.Further, the channel pitch of helical duct 13 is uniform along the axial direction of stator 20.
Offering helical duct 13 on the inwall of cylinder 10, helical duct 13 can be helicla flute, helical duct 13 direction of rotation can left-handed can dextrorotation.The magnetic direction that the direction of rotation of helical duct 13 produces with the coil of stator 20 is identical or contrary.Helical duct 13 on the inwall of motor cylinder 10 is preferably contrary with the magnetic direction that stator coil produces, and such cooling effect can be better.
The channel pitch of helical duct 13 can be determined according to power of motor and caloric value size, and spacing is with uniform for best.
Owing to having helical duct 13 on the internal perisporium of the cylinder 10 of motor, therefore cylinder 10 preferably casts, it is simple to processing and manufacturing.After helical duct 13 out cooling fluid arrive motor ante-chamber i.e. the first chamber, the port of export of helical duct 13 may be arranged at any one position of the surrounding of the barrel of cylinder 10, on the preferred front end cavity i.e. top of the first chamber that the port of export is arranged in motor or sidewall behind, the gas-liquid mixed state not yet evaporated cooling fluid so can be made due to action of gravity first to flow cavity bottom, then gaseous state cooling fluid re-evaporation, the heat that phase transformation absorbs can make the first chamber sufficiently cool.
As shown in Figure 1, accommodation chamber is separated into the first chamber and the second chamber by stator 20, first chamber and the second chamber are positioned at the two ends of air gap channel 40 mutually, first chamber and the second chamber are connected by air gap channel 40, the arrival end of helical duct 13 is arranged at the tail end place of stator 20, the tail end of stator 20 is arranged near the second chamber, and the port of export and first chamber of helical duct 13 are connected.Further, the head end being oppositely arranged with tail end of stator 20 is arranged in the first chamber, the port of export of tail end shield portions helical duct 13.
The original position of helical duct 13 of inside at the cylinder 10 of the tail end of motor opens a cooling import and cooling fluid inlet 12, flow out from the front end of motor behind the surface of cooling stator 20, any one position that the circumference that position can be opened on the barrel of cylinder 10 according to the original position of helical duct 13 is set of cooling fluid inlet 12.But consider that unit stringing is convenient, be generally opened on the bottom of cylinder 10 or the sidewall at the back side.
As it is shown in figure 1, cooling fluid auxiliary entrance 60 is opened on the barrel of the cylinder 10 at the first chamber place and is connected with the first chamber.Increase by a road cooling import in the front end of motor and namely cool down fluid auxiliary entrance 60, it is directly entered motor cavity front end and is namely directly entered the first chamber, increase the amount of cooling fluid, force enough cooling fluids by the air gap channel 40 between rotor 30 and the stator 20 of motor, with the inner surface of this rotor 30 outer surface cooling down motor and stator 20.The position of cooling fluid auxiliary entrance 60 may be arranged at any one position on the perisporium of cylinder 10.Owing to entering between rotor 30 and stator 20 the cooling fluid of air gap channel 40 through once cooling down, for avoiding cooling insufficient, increase a pipeline sprinkling cooling fluid in the front end of motor and namely increase cooling fluid auxiliary entrance 60 sprinkling cooling fluid, strengthen cooling effect with this.
The cooling fluid inlet 12 of the cooling fluid tail end from motor enters, and the outer surface at stator 20 arrives in front end i.e. first chamber of motor through helical duct 13, can cool down the outer surface of stator 20 in this process.An other road cooling fluid cools down import from the front end of motor and enters motor front end cavity simultaneously.Arrive the tail end of motor by air gap channel 40 between stator 20 and rotor 30 after two-way cooling fluid mixing and namely arrive in the second chamber, process can cool down the outer surface of the rotor 30 of motor and the inner surface of stator 20, flowed out eventually through the return gas channel 50 of the tail end of motor by the cooling fluid of the air gap channel 40 between stator 20 and rotor 30.
Wherein, the cooling fluid inlet 12 of the tail end of motor and the size of cooling fluid auxiliary entrance 60 are determined according to power of motor, and power of motor is more big, and cooling import is more big, otherwise more little.
Further, the axis of return gas channel 50 be arranged in parallel with the axis of cooling fluid inlet 12.It is easy to manufacture, it is easy to accomplish.
This utility model additionally provides a kind of compressor, and compressor includes permanent magnet synchronous electric thermomechanical components, and permanent magnet synchronous electric thermomechanical components is above-mentioned permanent magnet synchronous electric thermomechanical components.Owing to permagnetic synchronous motor is the parts of whole compressor core the most, it it is the power source of whole compressor, core in rotor core especially, once the permanent magnet demagnetization in rotor, will result directly in compressor cannot run well, the loss caused is destructive, and can will avoid the generation of this thing completely by this utility model, it is ensured that whole compressor operating safe and reliable.This utility model can solve the problem that the problem that large-size motor inhomogeneous cooling is even, it is ensured that motor rotation is normal.
This utility model additionally provides a kind of compressor, compressor includes permanent magnet synchronous electric thermomechanical components, compressor, vaporizer and condenser, permanent magnet synchronous electric thermomechanical components is above-mentioned permanent magnet synchronous electric thermomechanical components, cooling channels 11 is connected with condenser, and return gas channel 50 is connected with the air entry of vaporizer or compressor.
As can be seen from the above description, this utility model the above embodiments achieve following technique effect:
Cooling fluid causing the periphery wall of rotor sentence rotor is lowered the temperature, namely can be cooled to the middle part of the periphery wall of rotor, the barrel of cylinder offers at least one cooling fluid auxiliary entrance, cooling fluid auxiliary entrance is connected with air gap channel.Being provided with cooling fluid auxiliary entrance, cooling effect is better, it is to avoid the rotor longtime running of motor causes serious loss because permanent magnet demagnetization in hot environment.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (9)
1. a permanent magnet synchronous electric thermomechanical components, it is characterised in that including:
Cylinder (10), has accommodation chamber；
Stator (20), is arranged in described accommodation chamber；
Rotor (30), described stator (20) be set on the periphery wall of described rotor (30) and be formed with the air gap channel (40) being connected with described accommodation chamber between the periphery wall of described rotor (30), the inner tube wall of described cylinder (10) offers cooling fluid is introduced to the cooling channels (11) in described air gap channel (40)；
Return gas channel (50), is opened on the barrel of described cylinder (10)；
At least one cooling fluid auxiliary entrance (60), is opened on the barrel of described cylinder (10) and is connected with described air gap channel (40).
2. permanent magnet synchronous electric thermomechanical components according to claim 1, it is characterised in that described return gas channel (50) is connected with described air gap channel (40) by described accommodation chamber.
3. permanent magnet synchronous electric thermomechanical components according to claim 2, it is characterized in that, described accommodation chamber is separated into the first chamber and the second chamber by described stator (20), described first chamber is positioned at the two ends of described air gap channel (40) mutually with described second chamber, wherein, the import of described cooling channels (11) is arranged on the barrel of described cylinder (10), described cooling fluid auxiliary entrance (60) is connected with described first chamber, the outlet of described cooling channels (11) is connected with described first chamber, described return gas channel (50) is opened on the barrel of the described cylinder (10) corresponding to described second chamber place and is connected with described second chamber.
4. permanent magnet synchronous electric thermomechanical components according to claim 1, it is characterised in that described cooling channels (11) including:
Cooling fluid inlet (12), is opened on the barrel of described cylinder (10)；
Helical duct (13), it is opened on the internal perisporium of described cylinder (10) and extends along the circumferential and axial direction of described stator (20), the arrival end of described helical duct (13) is connected with described cooling fluid inlet (12), and the port of export of described helical duct (13) is connected with described air gap channel (40).
5. permanent magnet synchronous electric thermomechanical components according to claim 4, it is characterized in that, described accommodation chamber is separated into the first chamber and the second chamber by described stator (20), described first chamber is positioned at the two ends of described air gap channel (40) mutually with described second chamber, and the arrival end of described helical duct (13) is disposed in proximity to the tail end place of the described stator (20) of described second chamber.
6. permanent magnet synchronous electric thermomechanical components according to claim 5, it is characterised in that the port of export of described helical duct (13) is connected with described first chamber, described cooling fluid auxiliary entrance (60) is connected with described first chamber.
7. permanent magnet synchronous electric thermomechanical components according to claim 4, it is characterised in that the magnetic direction that the direction of rotation of described helical duct (13) produces with the coil of described stator (20) is identical or contrary.
8. a compressor, it is characterised in that include permanent magnet synchronous electric thermomechanical components, described permanent magnet synchronous electric thermomechanical components is the permanent magnet synchronous electric thermomechanical components according to any one of claim 1 to 7.
9. an air-conditioner, it is characterized in that, including permanent magnet synchronous electric thermomechanical components, compressor, vaporizer and condenser, described permanent magnet synchronous electric thermomechanical components is the permanent magnet synchronous electric thermomechanical components in any of the one of claim 1 to 7, described cooling channels (11) is connected with described condenser, and described return gas channel (50) is connected with the air entry of described vaporizer or described compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620156807.9U CN205407494U (en) | 2016-02-29 | 2016-02-29 | Permanent magnet synchronous motor assembly, compressor with permanent magnet synchronous motor assembly and air conditioner with permanent magnet synchronous motor assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620156807.9U CN205407494U (en) | 2016-02-29 | 2016-02-29 | Permanent magnet synchronous motor assembly, compressor with permanent magnet synchronous motor assembly and air conditioner with permanent magnet synchronous motor assembly |
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| CN205407494U true CN205407494U (en) | 2016-07-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329831A (en) * | 2016-09-20 | 2017-01-11 | 珠海格力电器股份有限公司 | Cooling structure of permanent magnet synchronous motor |
| CN107134884A (en) * | 2016-02-29 | 2017-09-05 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor assembly, compressor with permanent magnet synchronous motor assembly and air conditioner with permanent magnet synchronous motor assembly |
| CN107938801A (en) * | 2017-11-29 | 2018-04-20 | 广西博点旅游产业发展有限公司 | A kind of induction type long-life urinal |
| CN107965028A (en) * | 2017-11-29 | 2018-04-27 | 广西博点旅游产业发展有限公司 | A kind of long-life urinal |
| CN115313709A (en) * | 2022-09-29 | 2022-11-08 | 中国核动力研究设计院 | Stator structure, motor and turbine set |
-
2016
- 2016-02-29 CN CN201620156807.9U patent/CN205407494U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134884A (en) * | 2016-02-29 | 2017-09-05 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor assembly, compressor with permanent magnet synchronous motor assembly and air conditioner with permanent magnet synchronous motor assembly |
| CN106329831A (en) * | 2016-09-20 | 2017-01-11 | 珠海格力电器股份有限公司 | Cooling structure of permanent magnet synchronous motor |
| CN107938801A (en) * | 2017-11-29 | 2018-04-20 | 广西博点旅游产业发展有限公司 | A kind of induction type long-life urinal |
| CN107965028A (en) * | 2017-11-29 | 2018-04-27 | 广西博点旅游产业发展有限公司 | A kind of long-life urinal |
| CN115313709A (en) * | 2022-09-29 | 2022-11-08 | 中国核动力研究设计院 | Stator structure, motor and turbine set |
| CN115313709B (en) * | 2022-09-29 | 2023-01-06 | 中国核动力研究设计院 | Stator structure, motor and turbine unit |
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