CN109309430A - A motor cooling structure with water cooling in the center of the rotating shaft - Google Patents
A motor cooling structure with water cooling in the center of the rotating shaft Download PDFInfo
- Publication number
- CN109309430A CN109309430A CN201811388946.4A CN201811388946A CN109309430A CN 109309430 A CN109309430 A CN 109309430A CN 201811388946 A CN201811388946 A CN 201811388946A CN 109309430 A CN109309430 A CN 109309430A
- Authority
- CN
- China
- Prior art keywords
- water
- outer cover
- cooling
- axis
- tegillum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000001816 cooling Methods 0.000 title claims abstract description 54
- 238000012856 packing Methods 0.000 claims abstract description 19
- 239000000498 cooling water Substances 0.000 claims abstract description 16
- 239000004519 grease Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 11
- 230000001050 lubricating effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 3
- 206010030113 Oedema Diseases 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 230000007774 longterm Effects 0.000 claims 1
- 230000009972 noncorrosive effect Effects 0.000 claims 1
- 235000019628 coolness Nutrition 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000010992 reflux Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241001484259 Lacuna Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The present invention relates to a kind of motor coolings of spindle central water cooling, including outer cover, central water tube, water outlet water nozzle, axis tegillum, bearing, end cap, inner cover, high-pressure rotary lip packing, gasket, hollow rotating shaft, rotor, stator, casing.Axis tegillum is mounted on hollow rotating shaft end by bolt.Outer cover is fixed on end cap by bolt with the inner cover being located on the inside of end cap.High-pressure rotary lip packing is between axis tegillum and outer cover.Central water tube is mounted in outer cover centre bore as water inlet.Water outlet water nozzle is mounted at the water outlet screw hole covered outside.Runner is set in outer cover, is done cooling water reflux and is used.Cooling water is passed through inside hollow rotating shaft by central water tube, cooling water forms complete circulation waterway by finally being flowed out by the water outlet above outer cover inside hollow rotating shaft.The outside of hollow rotating shaft is in contact with bearing and rotor and connect.The present invention is suitable for the rotating machinery of various motors and center heat dissipation difficulty.
Description
Technical field
The present invention relates to a kind of motor coolings of spindle central water cooling, belong to motor cooling technology.
Background technique
The type of cooling of motor is mainly by following several at present: natural cooling, forced air cooling, liquid cooling.Because motor generates
The main portions of heat are stator winding, few specially to turning so the cooling position of current motor is mostly stator winding
Son and bearing do cooling.Motor higher for rotor heating or high-speed motor, just very to the cooling of rotor and bearing
It is important.Under high-temperature condition, the permanent magnet of magneto can demagnetize, bearing grease failure etc. can all occur.
There is small part motor to be equipped with circulation waterway in cover internal currently on the market, passes through the tape loop bearing running of cooling water
Heat.But the heat that stator winding generates can be transmitted to rotor portion by air gap, the heat on rotor can also pass through
Shaft passes to bearing, and the inner ring temperature of bearing is higher than outer ring temperature, and traditional type of cooling can only be outside cooling bearing
Circle.For magneto, electricity especially will have a direct impact on if radiating condition is bad to the higher motor of power density ratio
The service life and rated power of machine, it is serious also to will cause permanent magnet demagnetization, motor burning.For high-speed motor, operating
Speed is high, and bearing heating amount is bigger, if radiating condition is bad, will lead to bearing grease failure, motor burning.
Chinese patent CN204967537U discloses a kind of shaft water-cooling structure.The utility model relates to motor manufactures to lead
Domain, discloses a kind of shaft water-cooling structure, and semiaxis one is connect with semiaxis two by connecting pin；Centre bore is set in the semiaxis two,
The horizontal diversion pipe of setting in the centre bore, the both ends of horizontal diversion pipe are fixed on the centre bore by support sleeve, transition sleeve
It is interior；Transition sleeve also sets up water-sealed bearing, and one end of inner tube is fixed on the water-sealed bearing, on other end joining water box shell
Water inlet；Inner tube is connected to horizontal diversion pipe；Apopore is arranged far from one end of inner tube in horizontal diversion pipe；The end face of support sleeve
Uniformly distributed aperture is set；The cooling water flowed out from the apopore flows into tank shell through support sleeve, inner tube and center interporal lacuna, most
It is flowed out afterwards by tank shell water outlet；The hole is arranged in water-sealed bearing with retaining ring close to inlet end.The utility model structure
More complicated, axis is connected by two semiaxis with pin, and horizontal diversion pipe can rotate together with axis, and for axis water
Cold critical issue rotary dynamic seal problem does not provide corresponding scheme.
Summary of the invention
The technology of the present invention solves the problems, such as: overcoming the rotor of existing motor and bearing to radiate slow disadvantage, and solves rotation
Dynamic sealing problem provides a kind of motor cooling of efficient spindle central water cooling, can greatly improve rotor and axis
The radiating condition held improves motor torque density and power density, and structure is simple.
To achieve the goals above, the invention provides the following technical scheme:
The motor cooling of spindle central water cooling of the invention include: include: outer cover (1), central water tube (2), water outlet
It is water nozzle (3), axis tegillum (4), bearing (5), end cap (6), inner cover (7), high-pressure rotary lip packing (8), gasket (9), hollow
Shaft (10), rotor (11), stator (12) and casing (13)；Axis tegillum (4) installs gasket (9) additional and is mounted on sky by bolt afterwards
Heart shaft (10) end；Outer cover (1) is fixed on end cap (6) by bolt with the inner cover (7) being located on the inside of end cap (6)；Axis
It holds (5) to cover on hollow rotating shaft (10), be located in the bearing chamber of end cap (6)；High-pressure rotary lip packing (8) is installed on axis tegillum
(4) cavity between outer cover (1)；Central water tube (2) one end has fine thread, is mounted on outer cover (1) as water inlet
In centre bore；Water outlet water nozzle (3) is mounted at the water outlet screw hole on outer cover (1)；Cooling water is passed through sky by central water tube (2)
Heart shaft (10) is internal, and cooling water is finally flowed out by the water outlet of outer cover (1) above by the way that hollow rotating shaft (10) are internal, in
Edema with the heart involved pipe (2), hollow rotating shaft (10), outer cover (1) three parts in set runner and connect to form complete cooling cycle water route；It is hollow
The outer circle of shaft (10) is in contact and connect with bearing (5) and rotor (11)；The axis tegillum (4) has 3 groups of grooves, axis tegillum (4)
With the installation room that will form 3 groups of labyrinth seals and high-pressure rotary lip packing (8) after outer cover (1) cooperation；3 groups of labyrinth seals and lip
Shape seals the leakage for effectively preventing cooling water；Runner is set in the outer cover (1), the return flow line as cooling circulating water.
Runner is set in the outer cover (1), as the return flow line of cooling circulating water, and it is close in installation high-pressure rotary lip shape
The position B of envelope (8) does quenching or Carburization Treatment, enhances the hardness of the part of the surface, improves wearability, ensure that high pressure
The permanently effective work of rotary lip seal (8).
The inner hole of the hollow rotating shaft (10) has done antirust treatment, ensure that shaft inner hole is not given birth to when doing coolant liquid with water
Rust avoids conventional products and gets rusty caused water line block phenomenon.
The labyrinth seal that the outer cover (1) and axis tegillum (4) are formed has the radial clearance of 0.5mm to 0.75mm.
The outer cover (1) and axis tegillum (4) formed labyrinth seal must filled high-temperature lubricating grease, lubricating grease be resistance to before assembly
+ 200 DEG C of Wen Da.
First in the Hmp grease of installation cavity filling 2/3rds before high-pressure rotary lip packing (8) installation.
High-pressure rotary lip packing (8) the lip portion material is PTFE composite, has high-wearing feature, skeleton material
Material is 304 stainless steels, has a good corrosion resistance, maximum allowable speed can big 40m/s linear velocity, operating pressure vacuum is reachable
3MPa。
The advantages of the present invention over the prior art are that: the motor cooling of spindle central water cooling of the present invention can incite somebody to action
The heat that rotor and bearing generate directly is taken away by cooling circulating water, and labyrinth seal and lip packing effectively prevent cooling water
Leakage.The structure is simple, at low cost.Hollow shaft makes motor more be intended to lightweight, also just improves material
The power density of utilization rate and motor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the axis tegillum of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the central water tube of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the outer cover of the embodiment of the present invention；
Fig. 5 is the partial enlargement diagram and waterway circulating signal of the embodiment of the present invention；
In figure, 1 outer cover, 2 central water tubes, 3 water outlet water nozzles, 4 axis tegillums, 5 bearings, 6 end caps, 7 inner covers, 8 high-pressure rotary lips
Shape sealing, 9 gaskets, 10 hollow rotating shafts, 11 rotors, 12 stators, 13 casings.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
As shown in figure 1, figure 2, figure 3, figure 4 and figure 5, the motor cooling of spindle central water cooling of the present invention include outer cover 1,
It is central water tube 2, water outlet water nozzle 3, axis tegillum 4, bearing 5, end cap 6, inner cover 7, high-pressure rotary lip packing 8, gasket 9, hollow
Shaft 10, rotor 11；The end of hollow rotating shaft 10 is mounted on after the installation gasket 9 of axis tegillum 4 by bolt；Central water tube 2 is made
It is mounted on for water inlet in the centre bore of outer cover 1；Water outlet water nozzle 3 is mounted at the water outlet screw hole on outer cover 1；Outer cover 1 is located at electricity
Machine tail end is connected with end cap 6；Outer cover 1 is fixed on end cap 6 by bolt with the inner cover 7 for being located at 6 inside of end cap.Bearing 5
It covers on hollow rotating shaft 10, in the bearing chamber of end cap 6.High-pressure rotary lip packing 8 is installed on axis tegillum 4 and matches with outer cover 1
The cavity formed after closing；The outer circle of hollow rotating shaft 10 is in contact with the inner circle of the inner ring of bearing 5 and rotor 11 and connect；Stator 12
It is fixed on the inner circle of casing 13.Cooling water is passed through inside hollow rotating shaft 10 by central water tube 2, cooling water passes through hollow rotating shaft
10 inside are finally flowed out by the water outlet water nozzle 3 above outer cover 1, and complete circulation waterway is formed.
Runner is set in outer cover 1, functions primarily as the return flow line of cooling circulating water, and axial direction is played to bearing 5
It is fixed effect.
3 groups of grooves are distributed with above in axis tegillum 4, and the end A penetrates hollow rotating shaft 10, between hollow rotating shaft 10 and axis tegillum 4
Equipped with gasket, it is fastened by bolts together.
2 one end of central water tube has fine thread, is directly installed on the central hole of outer cover 1.
Cooling circulating water routing center water pipe 2, hollow rotating shaft 10,1 three parts of outer cover composition.
Axis tegillum 4 and outer cover 1 will form the installation room of 3 groups of labyrinth seals and high-pressure rotary lip packing 8 after cooperating.It is described
The labyrinth seal that outer cover 1 and axis tegillum 4 are formed must filled high-temperature lubricating grease before assembly, before high-pressure rotary lip packing 8 is installed
First in the Hmp grease of installation cavity filling 2/3rds.The filling of lubricating grease improves the sealing performance of labyrinth seal, protects
The normal circulation of cooling water is demonstrate,proved.
Central water tube 2 is mounted in the centre bore of outer cover 1 as water inlet, and outer cover 1 is by bolt and is located at 6 inside of end cap
Inner cover 7 be fixed on end cap 6.Central water tube 2 will not be rotated with the rotation of shaft, and the two is independent from each other, and is not had
There is direct connection relationship.
The inner wall of rotor 11 and the inner ring of bearing 6 are contacted with the cylindrical wall of hollow rotating shaft 10.It is generated in motor operation course
Heat pass to hollow rotating shaft 10 from the inner wall of rotor 11 and the inner ring of bearing 6, then pass through stream cooling inside hollow rotating shaft 10
The coolant liquid in road quickly takes away heat, greatly improves the heat-sinking capability of motor, reduces motor temperature rise, ensure that motor
It is long when stable operation.
A kind of HT-100 model of certain plant produced closes motor, is shell water cooling, and shaft is solid, forward and backward end cap all without
Cyclic water channel.Type approval test is done, 25 DEG C of environment temperature, stator winding temperature rise is 122K.Drive end bearing bracket bearing temperature rise is 77K, rear end
Lid bearing temperature rise is 75K.Motor is decomposed after finishing type approval test, the heat label of discovery rotor outer circle face paste shows that maximum temperature is
150 DEG C, temperature rise 125K.It carries out re-assemblying motor using the other component of hollow rotating shaft and the motor after present invention restructuring.
The heat label in the outer circle of motor rotor face paste newly assembled, and bury PT100 temperature in drive end bearing bracket, rear end cap and stator winding and pass
Sensor.Type approval test is carried out to the motor newly assembled and records data.Stator winding temperature rise is 113K.Drive end bearing bracket bearing temperature rise is
51K, bearing of rear end cover temperature rise are 49K.Motor is decomposed after the test, and the heat label on outer circle of motor rotor face shows the highest temperature
Degree is 120 DEG C, temperature rise 95K.Entire test process cooling water No leakage, sealing effect are good.Table 1 is original motor and applies this hair
Each position temperature rise data after bright electrical type tests.
Table 1:
A- original motor B- applies motor of the invention
It can be seen that from experimental data, axis water cooling is bigger on each position temperature rise of motor influence, especially to rotor and bearing
Temperature rise have apparent reduction.
Claims (7)
1. a kind of motor cooling of spindle central water cooling, it is characterised in that: including outer cover (1), central water tube (2), water outlet
It is water nozzle (3), axis tegillum (4), bearing (5), end cap (6), inner cover (7), high-pressure rotary lip packing (8), gasket (9), hollow
Shaft (10), rotor (11), stator (12) and casing (13)；Axis tegillum (4) installs gasket (9) additional and is mounted on sky by bolt afterwards
Heart shaft (10) end；Outer cover (1) is fixed on end cap (6) by bolt with the inner cover (7) being located on the inside of end cap (6)；Axis
It holds (5) to cover on hollow rotating shaft (10), be located in the bearing chamber of end cap (6)；High-pressure rotary lip packing (8) is installed on axis tegillum
(4) cavity between outer cover (1)；Central water tube (2) one end has fine thread, is mounted on outer cover (1) as water inlet
In centre bore；Water outlet water nozzle (3) is mounted at the water outlet screw hole on outer cover (1)；Cooling water is passed through sky by central water tube (2)
Heart shaft (10) is internal, and cooling water is finally flowed out by the water outlet of outer cover (1) above by the way that hollow rotating shaft (10) are internal, in
Edema with the heart involved pipe (2), hollow rotating shaft (10), outer cover (1) three parts in set runner and connect to form complete cooling cycle water route；It is hollow
The outer circle of shaft (10) is in contact and connect with bearing (5) and rotor (11)；The axis tegillum (4) has 3 groups of grooves, axis tegillum (4)
With the installation room that will form 3 groups of labyrinth seals and high-pressure rotary lip packing (8) after outer cover (1) cooperation；3 groups of labyrinth seals and lip
Shape seals the leakage for effectively preventing cooling water；Runner is set in the outer cover (1), the return flow line as cooling circulating water.
2. a kind of motor cooling of spindle central water cooling according to claim 1, it is characterised in that: in outer cover (1)
If runner, as the return flow line of cooling circulating water, and installation high-pressure rotary lip packing (8) position B do quenching or
Person's Carburization Treatment enhances the hardness of the part of the surface, improves wearability, ensure that high-pressure rotary lip packing (8) is long-term
Effective work.
3. a kind of motor cooling of spindle central water cooling according to claim 1, it is characterised in that: described hollow turn
The inner hole of axis (10) has done antirust treatment, ensure that shaft inner hole non-corrosive when doing coolant liquid with water, and it is raw to avoid conventional products
Water line block phenomenon caused by rust.
4. a kind of motor cooling of spindle central water cooling according to claim 1, it is characterised in that: the outer cover
(1) labyrinth seal formed with axis tegillum (4) has the radial clearance of 0.5mm to 0.75mm.
5. a kind of motor cooling of spindle central water cooling according to claim 1, it is characterised in that: the outer cover
(1) labyrinth seal formed with axis tegillum (4) filled high-temperature lubricating grease, lubricating grease heatproof must reach+200 DEG C before assembly.
6. a kind of motor cooling of spindle central water cooling according to claim 1, it is characterised in that: the high pressure rotation
2/3rds Hmp grease first is filled in installation cavity before turning lip packing (8) installation.
7. a kind of motor cooling of spindle central water cooling according to claim 1, it is characterised in that: the high pressure rotation
Turning lip packing (8) lip portion material is PTFE composite, has high-wearing feature, and framework material is 304 stainless steels, is had
Good corrosion resistance, maximum allowable speed can big 40m/s linear velocity, operating pressure vacuum is up to 3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811388946.4A CN109309430A (en) | 2018-11-21 | 2018-11-21 | A motor cooling structure with water cooling in the center of the rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811388946.4A CN109309430A (en) | 2018-11-21 | 2018-11-21 | A motor cooling structure with water cooling in the center of the rotating shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109309430A true CN109309430A (en) | 2019-02-05 |
Family
ID=65222325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811388946.4A Pending CN109309430A (en) | 2018-11-21 | 2018-11-21 | A motor cooling structure with water cooling in the center of the rotating shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109309430A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654134A (en) * | 2019-11-19 | 2020-09-11 | 摩登汽车有限公司 | Motor rotor center shaft, motor and electric automobile |
| CN113472165A (en) * | 2021-08-02 | 2021-10-01 | 广州小鹏汽车科技有限公司 | Assembling method and assembling structure of bearing pressing plate |
| CN114112891A (en) * | 2021-12-07 | 2022-03-01 | 北京科技大学 | High-temperature high-pressure water environment rotating electrode structure material testing machine |
| CN116846147A (en) * | 2023-08-22 | 2023-10-03 | 浙江青霄科技股份有限公司 | Water-cooling heat dissipation device of motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0951657A (en) * | 1995-06-02 | 1997-02-18 | Toyo Electric Mfg Co Ltd | Liquid cooled electric rotating machine |
| CN201435654Y (en) * | 2009-06-17 | 2010-03-31 | 抚顺煤矿电机制造有限责任公司 | A shaft water cooling structure |
| CN104285361A (en) * | 2012-03-08 | 2015-01-14 | 西门子公司 | Electric motor with rotor for cooling the electric motor |
| CN108462318A (en) * | 2017-02-22 | 2018-08-28 | 蔚来汽车有限公司 | Motor cooling structure, power motor and electric drive system |
-
2018
- 2018-11-21 CN CN201811388946.4A patent/CN109309430A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0951657A (en) * | 1995-06-02 | 1997-02-18 | Toyo Electric Mfg Co Ltd | Liquid cooled electric rotating machine |
| CN201435654Y (en) * | 2009-06-17 | 2010-03-31 | 抚顺煤矿电机制造有限责任公司 | A shaft water cooling structure |
| CN104285361A (en) * | 2012-03-08 | 2015-01-14 | 西门子公司 | Electric motor with rotor for cooling the electric motor |
| CN108462318A (en) * | 2017-02-22 | 2018-08-28 | 蔚来汽车有限公司 | Motor cooling structure, power motor and electric drive system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654134A (en) * | 2019-11-19 | 2020-09-11 | 摩登汽车有限公司 | Motor rotor center shaft, motor and electric automobile |
| CN113472165A (en) * | 2021-08-02 | 2021-10-01 | 广州小鹏汽车科技有限公司 | Assembling method and assembling structure of bearing pressing plate |
| CN114112891A (en) * | 2021-12-07 | 2022-03-01 | 北京科技大学 | High-temperature high-pressure water environment rotating electrode structure material testing machine |
| CN114112891B (en) * | 2021-12-07 | 2024-01-12 | 北京科技大学 | High-temperature high-pressure water environment rotary electrode structural material testing machine |
| CN116846147A (en) * | 2023-08-22 | 2023-10-03 | 浙江青霄科技股份有限公司 | Water-cooling heat dissipation device of motor |
| CN116846147B (en) * | 2023-08-22 | 2024-11-05 | 浙江青霄科技股份有限公司 | Water-cooling heat dissipation device of motor |
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Application publication date: 20190205 |