CN108429403B - Motor self-driven cooling structure based on cooling liquid - Google Patents
Motor self-driven cooling structure based on cooling liquid Download PDFInfo
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- CN108429403B CN108429403B CN201810487840.3A CN201810487840A CN108429403B CN 108429403 B CN108429403 B CN 108429403B CN 201810487840 A CN201810487840 A CN 201810487840A CN 108429403 B CN108429403 B CN 108429403B
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- Prior art keywords
- core
- cooling
- cooling liquid
- rotor core
- rotor
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- 238000001816 cooling Methods 0.000 title claims abstract description 63
- 239000000110 cooling liquid Substances 0.000 title claims abstract description 58
- 238000009423 ventilation Methods 0.000 claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
-
- 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
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a motor self-driven cooling structure based on cooling liquid, wherein a cooler is arranged at the top of a shell; the fan outside the shaft is driven by the rotating shaft to coaxially rotate with the rotating shaft; the sealing cover penetrates through the inner diameter of the stator core and extends into the cooler, and is isolated from the rotor core space in the shell to form a closed space; injecting cooling liquid into the sealing cover; the ventilation pipe is positioned at the axial outer side of the stator core, and the two ends of the ventilation pipe are communicated with the rotor core space; a plurality of auxiliary plates are connected between the rotating shaft and the rotor core, and the space between the auxiliary plates forms an axial air channel of the core; an air gap is formed between the rotor core and the inner peripheral surface of the sealing cover; the inner fan is used in a rotor circulating air path formed by a rotor core space, a ventilation pipe, an iron core axial air channel, a rotor core radial air channel and an air gap to generate power air flow. The invention has two independent cooling loops of stator and rotor, but absorbs heat through the cooling liquid, thereby increasing the use efficiency of the cooling liquid, reducing the cost and improving the heat dissipation efficiency.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor self-driven cooling structure based on cooling liquid.
Background
The motor used in the society generally encounters the problem of motor heating, which is a great difficulty in the industry. The aim of cooling is generally achieved by increasing materials and reducing the capacity of a motor. Will directly result in a common motor with copper and iron levels far exceeding the same capacity. Such copper and iron losses are also higher than for the same type of motor. How to solve the problems in the industry and make the common motor reduce materials and increase efficiency, and make the cooling and stable operation of the motor self-driven cooling structure based on cooling liquid in the high and new technology become the primary problem.
Besides the aim of reducing the temperature by changing the materials and the structure of the motor, the cooling mode commonly adopted in the industry also comprises air cooling and heat dissipation, and mainly comprises the following steps:
1, open-type ventilation cooling. This cooling system directly feeds a cooling medium (typically air) into the motor, absorbs energy, and discharges the energy to the surrounding environment. The cooling mode is suitable for open type and drip-proof motors in general clean, corrosion-free and explosion-free environments, and has higher requirements on motor application occasions and environments;
And 2, sealing, ventilating and circularly cooling. The inside of the motor is isolated from the surrounding environment to form a closed circulation loop, and the heat is taken out of the motor through a cooler after the air absorbs the heat in the closed circulation loop. The heat dissipation mode is slow in heat dissipation, and the high temperature generated when the motor rotates at a high speed is difficult to quickly dissipate, so that the motor is easy to age, and the service life of the motor is influenced.
Therefore, how to provide a motor self-driven cooling structure with reliable structure, convenient operation and excellent performance, which is based on cooling liquid, is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention aims to overcome the defects of the prior art, and provides a motor self-driven cooling structure based on cooling liquid, which is provided with an independent stator cooling system and an independent rotor cooling system, and solves the problems that the existing motor cooling structure is low in heat dissipation efficiency, and cannot be used for cooling stator and rotor respectively in a targeted manner. The specific scheme for achieving the purpose is as follows:
The motor comprises a shell, a stator core, a rotor core, a sealing cover, a ventilation pipe, a cooling liquid pool, an inner fan and a cooler, wherein the stator core is fixed in the shell through a machine base, penetrates into an inner cavity of the stator core, is aligned with the rotor core, and is sleeved in the middle of a rotating shaft;
the cooler is arranged at the top of the shell;
The out-of-shaft fan is fixed at the tail end of the rotating shaft, is driven by the rotating shaft to coaxially rotate with the rotating shaft and is positioned outside the shell; the fan outside the shaft does not need an independent driving source, and the fan outside the shaft is driven to form cooling air by the power of the rotating shaft when the motor runs, so that cooling liquid in the stator cooling system absorbs heat and cools down, the cost is reduced, and meanwhile, the working efficiency of the motor cooling system is improved.
The sealing cover passes through the inner diameter of the stator core to cover the stator core and extends into the cooler to be isolated from the rotor core space in the shell to form a closed space; injecting cooling liquid into the sealing cover to form a cooling liquid pool, wherein the stator iron core and the stator winding are immersed by the cooling liquid;
The ventilation pipe is positioned at the axial outer side of the stator core and penetrates through the inside of the sealing cover; the two ends of the ventilation pipe are communicated with the rotor core space;
a plurality of auxiliary plates are connected between the rotating shaft and the rotor iron core, and the space between the auxiliary plates forms an iron core axial air channel;
An air gap is formed between the rotor core and the inner peripheral surface of the sealing cover, and the air gap is communicated with the radial air channel of the rotor core;
The inner fan is positioned in the rotor core space and fixed at the shaft extension end of the rotating shaft, and is provided with a plurality of fan blades which are circumferentially arranged along the rotating shaft; the air-conditioning device is used for generating power airflow in a rotor circulating air path formed by the rotor core space, the ventilation pipe, the core axial air channel, the rotor core radial air channel and the air gap.
Preferably, a fan cover is arranged on one side of the cooler, and the fan cover and the shaft out-of-band fan are positioned on the same side.
Preferably, a fan housing is mounted externally of the shaft housing with a fan and directs an air flow to the fan housing for cooling the vaporized coolant to the cooler.
Preferably, a wind deflector is arranged in the fan cover, and the wind deflector is inclined to one side of the cooler. The inclination angle satisfies that cold air led by the fan cover is led into the cooler.
Preferably, the fan housing has an air inlet through which external air enters the fan housing under the action of an off-axis fan.
Preferably, the number of the ventilation pipes is several, and the ventilation pipes are uniformly distributed on the outer side of the stator core along the axial direction.
Preferably, the head end of the axial air channel of the iron core is open and is used for receiving the air flow in the circulating air channel; the tail end of the axial air channel of the iron core is closed and is used for guiding air flow into the radial air channel of the rotor iron core.
Preferably, a plurality of cooling pipes are arranged in the cooler, cold air is introduced into the cooling pipes through an external fan, heat of gasified cooling liquid is taken away, and gasified cooling liquid losing heat is condensed again into liquid and flows into the cooling liquid pool.
Preferably, the cooler adopts a water-cooling mode, and liquid, including water and other cooling liquids, is introduced into the cooling pipe, so that the effect of liquefying the cooling liquid is achieved.
Preferably, a ventilation plate is arranged at the connection position of the fan cover and the fan cover, and the ventilation plate can enable cold air to uniformly flow into the cooling pipe so as to increase cooling efficiency.
Preferably, the cooler is provided with an air outlet on one side opposite to the fan cover, and the air outlet is perpendicular to the air path.
Preferably, two ends of the rotating shaft are in non-transmission connection with the shell through bearings.
Preferably, the cooling liquid is insulating low-temperature volatile liquid.
Preferably, the brushless doubly-fed motor includes a motor and a generator. The motor cooling structure provided by the invention is applicable to both generators and motors.
According to the motor self-driven cooling structure based on the cooling liquid, as the stator and the rotor are designed to have two sets of independent cooling loops, but the cooling liquid absorbs heat, the complex cooling structure is reduced, the use efficiency of the cooling liquid is increased, and the cost is reduced.
1. The invention absorbs the heat of the motor stator through the cooling liquid, when the temperature of the motor reaches a certain value, the cooling liquid absorbs the heat emitted in the ventilation pipe to volatilize into gas, and the gas rises to the cooler. The cooler can send cold air flow into the cooling pipe without external motor control under the drive of the fan outside the shaft, the cooling liquid gas is taken away when encountering the heat of the cooling pipe, and the gas becomes liquid and flows back to the cooling liquid tank again.
2. The rotor core of the invention dissipates heat and is an independent air path, the inner fan is driven to exhaust air by the rotation of the rotating shaft, so that the internal air flows to the inner fan end through a rotor circulating air path formed by a rotor core space, an iron core axial air channel, a rotor core radial air channel and an air gap, and then the hot air is buried into the ventilation pipe in the cooling liquid through the stator side. In the process, heat is absorbed by the ventilation pipe and changed into cold air to blow to the tail end, so that a loop is formed. The purpose of cooling the rotor is achieved.
The cooling liquid used in the technology is low-temperature volatile liquid, has non-conductive property, and has a protective effect on motor insulation.
The invention can reduce the material and the volume of the common motor, reduce the operation temperature rise of the brushless double-fed motor and improve the reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a motor self-driven cooling structure based on cooling liquid;
Fig. 2 is an axial view of a motor self-driven cooling structure based on cooling liquid.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The motor comprises a shell 1, a stator core 2 fixed in the shell 1 through a machine seat, a rotor core 3 penetrating into the inner cavity of the stator core 2, a rotor core 3 aligned with the stator core 2, a sealing cover 21, a ventilation pipe 23, a cooling liquid pool 22, an inner fan 34 and a cooler 5, wherein the rotor core 3 is sleeved in the middle of a rotating shaft 4; the cooler 5 is arranged at the top of the shell 1; the out-of-shaft fan 7 is fixed at the tail end of the rotating shaft 4, is driven by the rotating shaft 4 to coaxially rotate with the rotating shaft 4 and is positioned outside the shell 1; the sealing cover 21 passes through the inner diameter of the stator core 2 to cover the stator core 2 and extends into the cooler 5 to be isolated from the rotor core space 31 in the shell 1 to form a closed space; a cooling liquid is injected into the sealing cover 21 to form a cooling liquid pool 22, and the stator core 2 and the stator winding are immersed by the cooling liquid; the ventilation pipe 23 is positioned at the axial outer side of the stator core 2 and penetrates through the inside of the sealing cover 21; two ends of the ventilation pipe 23 are communicated with the rotor core space 31; a plurality of auxiliary plates 41 are connected between the rotating shaft 4 and the rotor core 3, and an iron core axial air duct 42 is formed in the space between the auxiliary plates 41; an air gap 32 is formed between the rotor core 3 and the inner peripheral surface of the sealing cover 21, and the air gap 32 is communicated with a radial air duct 33 of the rotor core; the inner fan 34 is positioned in the rotor core space 31 and fixed at the shaft extension end of the rotating shaft 4, and the inner fan 34 is provided with a plurality of fan blades which are arranged along the circumferential direction of the rotating shaft 4; is used in the rotor circulation air path formed by the rotor core space 31, the ventilation pipe 23, the core axial air duct 42, the rotor core radial air duct 33 and the air gap 32 to generate power air flow.
In order to further optimize the technical solution, a fan housing 8 is arranged on one side of the cooler 5, and the fan housing 8 is positioned on the same side as the shaft out-of-band fan 7.
To further optimise the solution described above, a fan housing 11 is mounted outside the shaft-mounted external fan 7, and the fan housing 11 directs the air flow to the fan housing 8 for cooling the gasified cooling liquid to the cooler 5.
In order to further optimize the above technical solution, a wind deflector 9 is provided in the fan housing 8, and the wind deflector 9 is inclined to the cooler 5 side. The inclination angle is such that cold air guided by the fan housing 11 is introduced into the cooler 5.
In order to further optimize the above technical solution, the fan housing 11 has an air inlet through which outside air enters the fan housing 11 under the action of the off-axis fan 7.
In order to further optimize the technical solution described above, the number of ventilation ducts 23 is several and distributed uniformly in the axial direction outside the stator core 2.
To further optimize the above solution, the head end of the core axial air duct 42 is open for receiving the air flow in the circulating air path; the core axial air duct 42 is closed at its ends for directing air flow into the rotor core radial air duct 33.
In order to further optimize the technical scheme, a plurality of cooling pipes 51 are arranged in the cooler 5, cold air is introduced into the cooling pipes 51 through an external fan, heat of gasified cooling liquid is taken away, and gasified cooling liquid losing heat is condensed again into liquid and flows into the cooling liquid pool 22.
In order to further optimize the technical solution, the fan housing 11 is connected to the fan housing 8 by a ventilation board 10, and the ventilation board 10 can make the cool air flow into the cooling tube 51 uniformly.
In order to further optimize the above technical solution, the cooler 5 is provided with an air outlet on the opposite side of the fan housing 8, the air outlet being arranged perpendicular to the air path.
In order to further optimize the technical scheme, two ends of the rotating shaft 4 are in non-transmission connection with the shell 1 through bearings 6.
In order to further optimize the technical scheme, the cooling liquid is insulating low-temperature volatile liquid.
The coolant circuit is shown in the axial view of fig. 2, with the coolant merely circulating between the stator and the cooler.
The stator core and windings are cooled by absorbing heat from the cooling fluid. The cooling liquid absorbs heat and volatilizes into gas to be covered on the periphery of the cooling pipe upwards. The cooling pipe is internally provided with cold air which is introduced by an external fan. The heat of the gasified cooling liquid is taken away, and the gasified cooling liquid losing the heat is condensed again into liquid and flows into the stator cooling liquid pool 22. The repeated circulation in this way stabilizes the stator temperature at the set temperature.
And the heat absorption of the cooling liquid in the stator cooling system is completed through the fan outside the shaft, the function of the motor along with the start and the cooling is satisfied on the basis of not increasing the power source, the unnecessary resource and cost waste caused by the fact that the motor still executes the cooling operation in a non-running state are avoided, the cooling force changes along with the output power of the motor, the adjustment is not needed according to the motors with different powers, and the use is more convenient and reasonable.
The rotor cooling system is to extract hot air inside the rotor core and windings by a fan on the rotor. The hot air is converged to an air gap between the stator and the rotor through the axial air channel of the rotor core and flows to the fan. The fan sends hot air into 12 ventilation ducts on the stator, which 12 ventilation ducts are surrounded by cooling liquid. When hot air passes through, the heat is absorbed by 12 ventilation pipes and cooling liquid to become cold air, the cold air flows into the rear end, flows into the axial air duct of the iron core through the space of the rotor iron core, and the heat with the rotor iron core and the winding is absorbed by the fan to form a rotor circulating air path.
The motor referred to in the present invention is not limited to the motor and the generator.
The cooler related to the invention is not limited to adopting a water cooling or air cooling mode to cool down the cooling liquid, and also comprises the cooling principle of any cooler adopted in the prior art.
The above description has been made in detail of a self-driven cooling structure for a motor based on a cooling liquid, and specific examples are applied herein to illustrate the principles and embodiments of the present invention, and the above description of the examples is only for helping to understand the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (5)
1. The utility model provides a self-driven cooling structure of motor based on coolant liquid, the motor includes the shell, is fixed in through the frame stator core in the shell penetrates stator core inner chamber's rotor core, stator core aligns with rotor core, rotor core cup joints in the middle part of pivot, its characterized in that: the cooling device also comprises an out-of-shaft fan, a sealing cover, a ventilation pipe, a cooling liquid pool, an inner fan and a cooler;
The cooler is arranged at the top of the shell; a plurality of cooling pipes are arranged in the cooler, cold air is introduced into the cooling pipes through an external fan, heat of gasified cooling liquid is taken away, and the gasified cooling liquid losing heat is condensed again into liquid and flows into the cooling liquid pool;
The out-of-shaft fan is fixed at the shaft tail end of the rotating shaft, is driven by the rotating shaft to coaxially rotate with the rotating shaft and is positioned outside the shell;
the sealing cover penetrates through the inner diameter of the stator core and covers the stator core, extends into the cooler and is isolated from the rotor core space in the shell to form a closed space; injecting cooling liquid into the sealing cover to form a cooling liquid pool, wherein the stator iron core and the stator winding are immersed by the cooling liquid;
the ventilation pipe is axially arranged at the outer side of the stator core and penetrates through the inside of the sealing cover; two ends of the ventilation pipe are communicated with the rotor core space;
a plurality of auxiliary plates are connected between the rotating shaft and the rotor iron core, and the space between the auxiliary plates forms an iron core axial air channel;
The rotor core is provided with a plurality of gaps, and the gaps form a radial air channel of the rotor core; an air gap is formed between the rotor core and the inner peripheral surface of the sealing cover, and the air gap is communicated with the radial air channel of the rotor core;
The inner fan is positioned in the rotor core space and fixed at the shaft extension end of the rotating shaft, and is provided with a plurality of fan blades which are circumferentially arranged along the rotating shaft; the air-conditioning device is used for generating power airflow in a rotor circulating air path formed by the rotor core space, the ventilation pipe, the core axial air channel, the rotor core radial air channel and the air gap.
2. The self-driven cooling structure of a coolant-based motor according to claim 1, wherein a fan housing is provided at one side of the cooler, and the fan housing is located at the same side as the shaft out-of-band fan.
3. The self-driven cooling structure of a coolant-based motor according to claim 1, wherein the number of ventilation pipes is several and is uniformly distributed on the outer side of the stator core in the axial direction.
4. The self-driven cooling structure of a coolant-based motor of claim 1, wherein a head end of the core axial air duct is open for receiving an air flow in the circulating air duct; the tail end of the axial air channel of the iron core is closed and is used for guiding air flow into the radial air channel of the rotor iron core.
5. The self-driven cooling structure of a motor based on a cooling liquid according to claim 1, wherein the cooling liquid is an insulating low-temperature volatile liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810487840.3A CN108429403B (en) | 2018-05-21 | 2018-05-21 | Motor self-driven cooling structure based on cooling liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810487840.3A CN108429403B (en) | 2018-05-21 | 2018-05-21 | Motor self-driven cooling structure based on cooling liquid |
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| CN108429403A CN108429403A (en) | 2018-08-21 |
| CN108429403B true CN108429403B (en) | 2024-05-28 |
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| CN201810487840.3A Active CN108429403B (en) | 2018-05-21 | 2018-05-21 | Motor self-driven cooling structure based on cooling liquid |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098695B (en) * | 2018-12-05 | 2024-02-27 | 涌镇液压机械（上海）有限公司 | Cylindrical cooler structure |
| CN109921567B (en) * | 2019-05-06 | 2019-12-24 | 哈尔滨理工大学 | Rotor alternate type air supplement system of large synchronous phase modulator |
| CN112814935A (en) * | 2021-02-05 | 2021-05-18 | 陈亮 | High-speed air suspension compressor for fuel cell, fuel cell system and vehicle |
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