CN114400820A - Two-medium mixed motor bidirectional cooling structure and cooling method - Google Patents
Two-medium mixed motor bidirectional cooling structure and cooling method Download PDFInfo
- Publication number
- CN114400820A CN114400820A CN202111621969.7A CN202111621969A CN114400820A CN 114400820 A CN114400820 A CN 114400820A CN 202111621969 A CN202111621969 A CN 202111621969A CN 114400820 A CN114400820 A CN 114400820A
- Authority
- CN
- China
- Prior art keywords
- liquid
- motor
- cooling
- fan
- stator
- 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
Images
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
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- 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
-
- 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
-
- 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
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention belongs to the technical field of motor design and manufacture and motor cooling structure optimization, and relates to a double-medium mixed motor bidirectional cooling structure and a cooling method, wherein the method comprises the following steps: s1, cooling liquid flows into the annular liquid tank from the liquid inlet, then enters the liquid channel, finally flows out of the motor from the liquid outlet through the annular liquid tank at the other end to form a forward liquid cooling passage, so that the liquid medium is cooled; s2, when the motor runs, the wave fan rotates synchronously along with the motor rotating shaft to drive the gas in the motor cavity to rotate and flow, the generated axial cooling gas flows out from the motor cavity through the gas channel to form a reverse gas cooling passage, and the cooling of the gas medium of the motor is realized. The bidirectional cooling structure of the invention forms forward and backward combined cooling by introducing two cooling media of cooling liquid and air, can effectively solve the defects of poor heat dissipation effect and large axial temperature difference of the traditional motor cooling system, and realizes novel three-dimensional multi-fluid mixed cooling.
Description
Technical Field
The invention belongs to the technical field of motor design and manufacture and motor cooling structure optimization, and relates to a double-medium mixed motor bidirectional cooling structure and a cooling method.
Background
With the continuous upgrading and updating of modern industrial products, the power core component taking the motor as a driving support plays an increasingly important role as the component with the widest application in the fields of product manufacturing, transportation, aerospace and the like. In recent years, the design of a new-generation motor having weight reduction as a priority feature has been a long-sought goal by researchers and manufacturers. Although the single medium cooling (water cooling, air cooling and oil cooling) and internal and external space heat dissipation structures of the existing motor have good applicability to solving the problem of overhigh temperature rise of key parts such as windings, rotors and the like, the continuous reduction of the motor volume and the compression of the internal space brings challenges to the cooling effect of the single medium and the heat dissipation structures thereof. Secondly, because the heat production of the traditional motor mainly takes stator winding copper loss, stator and rotor iron core iron loss and permanent magnet eddy current loss, under the condition of not considering the end part, the radial heat production is different, and the axial heat production is uniform. How to give full play to the advantages and disadvantages of multimediums such as water cooling and air cooling, effectively combine traction motor inside seal space and outside casing space cooling structure, realize novel three-dimensional multithread body mixed cooling, be one of the technical difficulties who realizes the motor lightweight.
Based on the above technical background, the technical solutions provided by the existing data include the following categories: (1) the novel cooling structure for single medium cooling takes water, oil or air as a medium for related data, and a novel stator and rotor or engine base structure is designed to provide corresponding cooling channels; (2) a double-medium double-cooling structure is adopted, water and air are mostly used as cooling media, and a stator and rotor ventilation structure adapted to the cooling media is designed. At present, the high-power density motor in the industry mostly adopts a high-efficiency water cooling mode; the traction motor of the high-speed motor train unit generally adopts an open type ventilation cooling system; for the permanent magnet traction motor, because of the special adsorbability of the magnet, a totally closed structure is usually adopted, an axial external cooling type is realized by adopting an axial air hole of a motor shell, the cooling effect is much worse than that of an open type, so that the temperature of a motor winding and a permanent magnet is very high, and the temperature distribution of the motor winding and the permanent magnet along the axial direction of a rotor is uneven. Therefore, no matter water cooling, air cooling or oil cooling is adopted, cooling media enter from one end of the channel and flow out from the other end of the channel, the inherent flow speed difference and the medium temperature difference affect the axial cooling effect inside the motor, the difference of the axial temperature difference is large, and the integral heat dissipation and cooling requirements of the motor are difficult to meet. In addition, traditional motor is through spot welding or constant head tank mode with stator core embedding casing in the assembly, and tooth clamp plate or the riveting of stator ventilation frid are adopted in the fastening of axial silicon steel sheet, and this type of mode has good fixed effect, nevertheless can appear tooth portion not hard up and silicon steel sheet fold pressure coefficient reduction phenomenon in time, and the electromagnetic noise and the vibration that produce from this exceed standard the scheduling problem also need to be solved urgently. Aiming at the problems, the invention provides a bi-directional cooling structure and a bi-directional cooling method for a dual-medium mixed motor, which can realize novel three-dimensional multi-fluid mixed cooling and effectively solve the defects of the prior art that a cooling system in the traditional motor has poor heat dissipation effect, large axial temperature difference, overproof vibration noise and the like.
Disclosure of Invention
Aiming at the problems brought forward by the background technology, the technical scheme adopted by the application is as follows:
a bi-directional cooling structure for a dual-media hybrid electric machine, comprising: the motor comprises a shell 11, a stator core 14, a rotor 15, a motor rotating shaft 16 and a wave fan 04;
the stator core 14 is installed in the casing 11, and the rotor 15 is installed on the motor shaft 16;
the rotor 15 and the motor rotating shaft 16 are both positioned in the stator core 14;
a plurality of liquid channels 02 are arranged in the shell 11;
two ends of the shell 11 are provided with annular liquid tanks 01;
the annular liquid tank 01 is used for communicating the liquid channels 02 and plays a role of communicating liquid passages;
a liquid inlet hole 12 and a liquid outlet hole 13 are respectively arranged at two ends of the shell 11;
the liquid inlet 12 and the liquid outlet 13 are communicated with the liquid channel 02;
the liquid channels 02, the annular liquid tanks 01 at two ends of the machine shell 11, the liquid inlet holes 12 and the liquid outlet holes 13 form a liquid cooling passage together;
the plurality of air ducts 03 form an air cooling path together with the inner surface of the cabinet 11;
a wave fan 04 is arranged on the motor rotating shaft 16 close to the liquid outlet hole 13 side;
the wave fan 04 is used for: rotating with the motor shaft 16 to provide air-cooled gas; and compresses the rotor 15 to prevent the end from deforming.
On the basis of the technical scheme, the stator core 14 is connected with the casing 11 by the plurality of radial fastening screws 05 penetrating through the casing 11 from the outer surface of the casing 11, so that the stator core 14 is fixed;
arranging n × m radial fastening screws 05 at intervals of 360/n degrees in the circumferential direction of the casing 11, wherein m is the number of the radial fastening screws 05 uniformly distributed in the same axial direction, and n is the number of rows;
a plurality of axial fastening screws 06 axially penetrate through the stator core 14 to fasten the silicon steel sheet of the stator core 14;
h axial fastening screws 06 are arranged at intervals of 360/h degrees in the circumferential direction of the stator core 14.
On the basis of the technical scheme, the liquid channel 02 is a straight liquid channel 21 or a snake-shaped liquid channel 22.
On the basis of the technical scheme, k straight liquid channels 21 are uniformly distributed along the circumferential direction in the shell 11; the positions of the straight liquid channels 21 correspond to the positions of k tooth parts or stator slots on the stator core 14 one by one; the k straight liquid channels 21 are communicated by annular liquid grooves 01 arranged at the front end and the rear end of the machine shell 11.
On the basis of the technical scheme, the plurality of snake-shaped liquid channels 22 are separated into n fan-shaped symmetrical structures of 360/n degrees by n rows of radial fastening screws 05;
the serpentine liquid channel 22 in each fan-shaped symmetrical structure is arranged in a serpentine surrounding manner along the circumferential direction of the machine shell 11;
the n serpentine liquid channels 22 are communicated with the annular liquid tank 01 arranged at the front end and the rear end of the machine shell 11.
On the basis of the technical scheme, the air passage 03 is a flat air passage 31, a semicircular air passage 32 or a triangular air passage 33;
the cross-sectional shape of the flat air passage 31 is as follows: a rectangle shape; the cross-sectional shape of the semicircular air passage 32 is as follows: semicircular; the cross-sectional shape of the triangular air passage 33 is as follows: and (4) a triangle.
On the basis of the technical scheme, the positions of the air passages 03 correspond to the positions of the k tooth parts on the stator core 14 one by one;
the width of the flat air duct 31 is the same as the width of the teeth 41;
the diameter of the semicircular air passage 32 is the same as the width of the teeth 41;
the opening edge of the triangular air duct 33 is the same as the width of the teeth 41.
On the basis of the technical scheme, the positions of the air passages 03 correspond to the positions of the k stator slots on the stator core 14 one by one;
the width of the flat air passage 31 is the same as that of the stator slot body 42;
the diameter of the semicircular air passage 32 is the same as the width of the stator slot body 42;
the opening edge of the triangular air channel 33 is the same as the width of the stator slot body 42.
On the basis of the technical scheme, the wave fan 04 is of a circumferential symmetrical structure, j fan-shaped wave blades 51 with an interval of 360/j degrees are uniformly distributed on the edge of the circumference, one end of the outward extending edge of each fan-shaped wave blade 51 is lower than the other end of the outward extending edge of each fan-shaped wave blade 51, and the end with the high extending edge is of a sawtooth-shaped or arc-shaped structure.
A cooling method of the bidirectional cooling structure of the motor with the application of the double-medium mixing comprises the following steps:
s1, cooling liquid flows into the annular liquid tank 01 from the liquid inlet 12, then enters the liquid channel 02, finally flows out of the motor from the liquid outlet 13 through the annular liquid tank 01 at the other end to form a forward liquid cooling passage, so that the liquid medium is cooled;
s2, when the motor operates, the wave fan 04 synchronously rotates along with the motor rotating shaft 16 to drive the gas in the motor cavity to rotate and flow, the generated axial cooling gas flows out from the motor cavity through the gas channel 03 to form a reverse gas cooling passage, and the cooling of the gas medium of the motor is realized.
The invention has the following beneficial technical effects:
the two-medium mixed motor bidirectional cooling structure provided by the invention forms forward and reverse combined cooling by introducing two cooling media, namely cooling liquid (such as water) and air, can effectively overcome the defects of poor heat dissipation effect and large axial temperature difference of the traditional motor cooling system, and realizes novel three-dimensional multi-fluid mixed cooling; meanwhile, the motor has a good relieving effect on the problems of electromagnetic noise, vibration overexcitation and the like in the operation process of the motor.
Drawings
The invention has the following drawings:
FIG. 1 is a schematic view of a bi-directional cooling structure of a dual-media hybrid electric machine according to the present application;
FIG. 2 is an exploded view of a dual-cooling configuration of a dual-media hybrid electric machine according to the present application;
FIG. 3 is a first schematic diagram of the position distribution cross-sectional structure of the radial fastening screw 05 and the axial fastening screw 06;
FIG. 4 is a second schematic structural diagram illustrating the position distribution cross-sections of the radial fastening screws 05 and the axial fastening screws 06;
FIG. 5 is a schematic view of a liquid cooling passage structure formed by the straight liquid passage 21;
FIG. 6 is a schematic view of a liquid cooling channel structure formed by the serpentine liquid passage 22;
fig. 7 is a schematic structural view of an air cooling passage formed by the flat air duct 31;
FIG. 8 is a schematic diagram of the air cooling path formed by the semicircular air ducts 32;
FIG. 9 is a schematic diagram of the air cooling passage formed by the triangular air passages 33;
FIG. 10 is an enlarged partial view of the flat air duct 31 of FIG. 3;
FIG. 11 is an enlarged partial view of FIG. 3 showing the semicircular air passage 32 at point A;
FIG. 12 is an enlarged partial view of the triangular air passage 33 of FIG. 3 at A;
FIG. 13 is an enlarged partial view of the flat air duct 31 of FIG. 4 at B;
FIG. 14 is an enlarged partial view of FIG. 4 with the semi-circular air passages 32 shown at B;
FIG. 15 is a schematic view of a portion of the triangular air duct 33 of FIG. 4 at B;
FIG. 16 is a first structural view of a wave fan 04;
FIG. 17 is a second schematic structural view of a wave fan 04;
FIG. 18 is a schematic view of the flow trajectory of the bi-directional cooling fluid;
FIG. 19 is a schematic view of the structure of the radial fastening screw 05;
fig. 20 is a schematic structural view of the axial fastening screw 06.
Reference numerals:
01. an annular liquid bath; 02. a liquid channel; 03. an airway; 04. a wave fan; 05. radially fastening the screw rod; 06. axially fastening the screw rod; 11. a housing; 12. a liquid inlet hole; 13. a liquid outlet hole; 14. a stator core; 15. a rotor; 16. a motor shaft; 21. a straight liquid channel; 22. a serpentine liquid channel; 31. a flat air passage; 32. a semicircular air passage; 33. a triangular air passage; 41. in the tooth part teeth; 42. a stator slot body; 51. fan-shaped wave blades.
Detailed Description
The invention is described in further detail below with reference to the accompanying figures 1-20 and examples.
Example one
Fig. 1-2 show an example of a bidirectional cooling structure of a motor using a straight liquid channel 21 and a flat air channel 31, in which the liquid medium is water and the gas medium is air, and the bidirectional cooling structure includes: the device comprises an annular liquid groove 01, a liquid channel 02, an air channel 03, a wave fan 04, a radial fastening screw rod 05 and an axial fastening screw rod 06. As shown in the schematic exploded view of fig. 2, the annular liquid tank 01 is disposed at two ends of the housing 11, and functions to connect a plurality of liquid channels 02 in parallel and communicate liquid passages; the liquid channel 02 is arranged in the casing 11, and forms a liquid cooling passage with the annular liquid tank 01 at two ends of the casing 11, the external liquid inlet 12 and the external liquid outlet 13; the air channel 03 is arranged in a slot on the outer surface of the stator core 14 and forms an air cooling passage with the inner surface of the shell 11; the wave fan 04 is an annular boss with a wave structure, is arranged at the end part of the motor rotating shaft 16 close to the liquid outlet hole 13 side, rotates along with the end part to provide air cooling air, and plays a role in compressing the rotor 15 and preventing the end part from deforming; the radial fastening screw rod 05 (with a structure schematic reference to fig. 19) penetrates through the casing 11 from the outer surface of the casing 11 to be connected with the stator core 14, and plays a role in fixing the stator core 14; the axial fastening screw 06 (refer to fig. 20 for structural schematic) axially penetrates through the stator core 14 to fasten the silicon steel sheet of the stator core 14.
In this embodiment, n is set to be 4, m is set to be 2, h is set to be 4, k is set to be 24, and j is set to be 8.
Example two
As shown in fig. 3-4, which are schematic diagrams of the distribution cross-sectional structures of the radial fastening screws 05 and the axial fastening screws 06, respectively, n × m is 8 radial fastening screws 05 arranged at intervals of 360/n ° to 90 ° in the circumferential direction of the housing 11, where m is 2 uniform in the same axial direction; the axial fastening screws 06 are provided in 4 pieces at an interval of 360/h ° of 90 ° in the circumferential direction of the stator core 14, and the axial fastening screws 06 are located at an interval of 180/n ° of 45 ° in the circumferential direction from the radial fastening screws 05. In this example, 24 straight liquid channels 21 (as shown in fig. 5) are uniformly distributed along the circumferential direction, and the positions of the straight liquid channels correspond to the positions of 24 teeth on the stator core 14 one by one, and the 24 straight liquid channels 21 are combined in parallel by annular liquid channels 01 in the front end and the rear end of the housing 11; the positions of the flat air passages 03 correspond to the positions of 24 teeth on the stator core 14 one by one, and the width of the flat air passages is the same as the width of 41 teeth in the teeth. As shown in fig. 16-17, the wave fan 04 has a circular symmetrical structure, and 8 wave blades 51 are uniformly distributed on the edge of the circumference at an interval of 360/j ° -45 °, and one end of the outward extending edge of the wave blade 51 is lower than the other end of the outward extending edge of the wave blade 51, wherein the end with the higher extending edge is serrated (as shown in fig. 16).
As shown in fig. 18, a schematic flow path diagram for bi-directional cooling of the motor by using the structure includes: as shown by the solid line in fig. 18, the cooling water enters the annular liquid tank 01 at the front end of the casing 11 from the liquid inlet 12 at the outside of the casing 11, then enters the straight liquid channel 21, and finally flows out of the motor from the liquid outlet 13 through the annular liquid tank 01 at the rear end of the casing 11 to form a forward water cooling passage to realize water cooling; when the motor operates, the wave fan 04 rotates synchronously along with the motor rotating shaft 16 to drive air in the motor cavity to rotate and flow, and the generated axial cooling air flows into the flat air passage 31 (as shown in fig. 7) from the rear end cavity and flows out of the motor cavity to form a reverse air cooling passage so as to realize air cooling and cooling of the motor.
EXAMPLE III
In another embodiment, a two-way cooling structure of a motor with a serpentine liquid channel 22 (shown in fig. 6) and a semicircular air channel 32 (shown in fig. 8) and a double-medium mixture of cooling oil as a liquid medium and air as a gas medium is adopted, and setting parameters n is 6, m is 3, h is 8, k is 36, and j is 12. In the present embodiment, 18 radial fastening screws 05 are provided at intervals of 360/n ° -60 ° in the circumferential direction of the housing 11, where m is 3 uniformly distributed in the same axial direction; the 8 axial fastening screws 06 are provided at an interval of 360/8 ° -45 ° in the circumferential direction of the stator core 14. The serpentine liquid channels 22 are separated by 3 radial fastening screws 05 in the same axial direction into 6 fan-shaped symmetrical structures of 360/6 degrees to 60 degrees, which are snakelike surrounded in each fan-shaped symmetrical structure along the circumferential direction, and the 6 serpentine liquid channels 22 are combined in parallel by annular liquid grooves 01 in the front end and the rear end of the casing 11. The positions of the semicircular air passages 32 correspond to the positions of the 36 stator slots on the stator core 14 one by one, and the diameter of the semicircular air passages is the same as the width of the stator slot bodies 42 (shown in fig. 10-15). The wave fan 04 is a circular symmetrical structure, 12 fan-shaped wave blades 51 with an interval of 360/12 degrees, namely 30 degrees, are uniformly distributed on the edge of the circumference, one end of the outward extending edge of the fan-shaped wave blade 51 is lower than the other end of the outward extending edge of the fan-shaped wave blade 51, and the end with the higher extending edge is an arc-shaped structure (as shown in fig. 17).
The method for bidirectional cooling of the motor by using the structure comprises the following steps: cooling oil enters an annular liquid tank 01 at the front end of the machine shell 11 from a liquid inlet hole 12 at the outer part of the machine shell 11, then enters a straight liquid channel 21, finally passes through the annular liquid tank 01 at the rear end of the machine shell 11 and flows out of the motor from a liquid outlet hole 13 to form a positive oil cooling passage, so that oil cooling is realized; when the motor operates, the wave fan 04 rotates synchronously with the motor rotating shaft 16 to drive air in the motor cavity to rotate and flow, and the generated axial cooling air flows into the flat air passage 31 (as shown in fig. 7) from the rear end cavity and flows out of the motor cavity to form a reverse air cooling passage to realize air cooling and cooling of the motor.
Example four
In another group of embodiments, any combination of straight water channels or serpentine water channels, flat air channels or semicircular air channels or triangular air channels, water or oil/air is adopted, and the setting parameters n are 4, m is 4, h is 6, k is 48, and j is 6.
A fluid-solid coupling method is adopted to carry out simulation research on the temperature distribution condition of a closed permanent magnet synchronous motor. The original motor cooling structure adopts axial water cooling, the cooling water channel is a straight water channel, cooling water flows in from the water inlet of the shell, and cooling water flows out from the water outlet. The new motor cooling structure takes the form of the first embodiment described in the present invention and the simulation results are shown in table 1.
TABLE 1 comparison table of highest temperature of each part of motor and axial temperature difference of winding
From the results in table 1, it can be known that the single medium water cooling of the original motor has limited cooling effect on each component in the motor, and the heat of the iron core and the winding is only dissipated by the heat convection when the water medium flows. After the bi-directional cooling structure and the cooling method of the dual-medium mixed motor described in the invention are adopted, the heat of the winding and the iron core in the motor in the embodiment I is not only used for cooling water convection heat exchange, but also used for stirring the air in the cavity by the wave fan to perform forced ventilation heat exchange with the end part of the winding, so that the highest temperature in the winding is reduced; meanwhile, the cooling gas entering the air duct and the surface of the iron core in the air duct generate forced convection, so that the highest temperature of the iron core is slightly reduced, and the axial temperature difference of the winding is indirectly reduced. Therefore, the beneficial effects brought by the invention have good practicability.
The key points and points to be protected of the invention are as follows:
1. the two-way cooling structure of the motor that two mediums mix includes: the device comprises an annular liquid tank 01, a liquid channel 02, an air channel 03, a wave fan 04, a radial fastening screw rod 05 and an axial fastening screw rod 06; the annular liquid tank 01 is arranged at two ends of the machine shell 11 and plays a role in connecting a plurality of liquid channels 02 in parallel and communicating liquid passages; the liquid channel 02 is arranged in the casing 11, and forms a liquid cooling passage with the annular liquid tank 01 at two ends of the casing 11, the external liquid inlet 12 and the external liquid outlet 13; the air channel 03 is arranged in a slot on the outer surface of the stator core 14 and forms an air cooling passage with the inner surface of the shell 11; the wave fan 04 is an annular boss with a wave structure, is arranged on the motor rotating shaft 16 close to the liquid outlet hole 13 side and rotates along with the motor rotating shaft to provide air-cooled gas, and plays a role in compressing the rotor 15 and preventing the end part from deforming; the radial fastening screw rod 05 penetrates through the casing 11 from the outer surface of the casing 11 to be connected with the stator core 14, and plays a role in fixing the stator core 14; the axial fastening screw 06 axially penetrates through the stator core 14 to fasten the silicon steel sheet of the stator core 14.
2. N × m radial fastening screws 05 are arranged at intervals of 360/n degrees in the circumferential direction of the machine shell 11, wherein m radial fastening screws are uniformly distributed in the same axial direction; h axial fastening screws 06 are arranged at intervals of 360/h ° in the circumferential direction of the stator core 14.
3. The liquid channels 02 are straight liquid channels 21 or snakelike liquid channels 22, wherein k straight liquid channels 21 are uniformly distributed along the circumferential direction, the positions of the k straight liquid channels correspond to the positions of k tooth parts or stator slots on the stator core 14 one by one, and the k straight liquid channels 21 are combined in parallel by annular liquid slots 01 in the front end and the rear end of the shell 11; the serpentine liquid channels 22 are divided into n fan-shaped symmetrical structures of 360/n degrees by m radial fastening screws 05 in the same axial direction, and are snakelike around in the circumferential direction in each fan-shaped symmetrical structure, and the n serpentine liquid channels 22 are combined in parallel by annular liquid grooves 01 in the front end and the rear end of the machine shell 11.
4. The air passage 03 is a flat air passage 31, a semicircular air passage 32 or a triangular air passage 33, and the positions of the air passage 03 correspond to the positions of k tooth parts or stator slots on the stator iron core 14 one by one; the width of the flat air passage 31, the diameter of the semicircular air passage 32 and the opening edge of the triangular air passage 33 are the same as the width of the tooth part teeth 41 or the stator slot body 42.
5. The wave fan 04 is a circumferential symmetrical structure, j fan-shaped wave blades 51 with an interval of 360/j degrees are uniformly distributed on the edge of the circumference, one end of the outward extending edge of each fan-shaped wave blade 51 is lower than the other end of the outward extending edge of each fan-shaped wave blade 51, and the end with the high extending edge is of a sawtooth-shaped or arc-shaped structure.
6. The method for bidirectional cooling of the motor by using the structure comprises the following steps: cooling liquid enters the annular liquid tank 01 at the front end of the machine shell 11 from the liquid inlet hole 12 outside the machine shell 11, then enters the straight liquid channel 21 or the snake-shaped liquid channel 22, and finally flows out of the motor from the liquid outlet hole 13 through the annular liquid tank 01 at the rear end of the machine shell 11 to form a forward liquid cooling passage, so that the liquid medium is cooled; when the motor operates, the wave fan 04 rotates synchronously along with the motor rotating shaft 16 to drive the gas in the motor cavity to rotate and flow, the generated axial cooling gas flows into the flat gas passage 31, the semicircular gas passage 32 or the triangular gas passage 33 from the rear end cavity and flows out of the motor cavity to form a reverse gas cooling passage to cool the gas medium of the motor.
The above description is only a specific embodiment of the present invention, but the protection of the present invention is not limited thereto, and any modifications without substantial changes made by those skilled in the art without changing the principle should also be regarded as the protection scope of the present invention.
Details not described in the present specification are prior art known to those skilled in the art.
Claims (10)
1. A two-way cooling structure of a dual-medium hybrid motor is characterized by comprising: the motor comprises a machine shell (11), a stator iron core (14), a rotor (15), a motor rotating shaft (16) and a wave fan (04);
the stator core (14) is arranged in the shell (11), and the rotor (15) is arranged on a motor rotating shaft (16);
the rotor (15) and the motor rotating shaft (16) are both positioned in the stator core (14);
a plurality of liquid channels (02) are arranged in the shell (11);
two ends of the shell (11) are provided with annular liquid tanks (01);
the annular liquid tank (01) is used for communicating the liquid channels (02) to play a role of communicating liquid passages;
a liquid inlet (12) and a liquid outlet (13) are respectively arranged at two ends of the shell (11);
the liquid inlet hole (12) and the liquid outlet hole (13) are communicated with the liquid channel (02);
the plurality of liquid channels (02), the annular liquid tanks (01) at the two ends of the shell (11), the liquid inlet holes (12) and the liquid outlet holes (13) form a liquid cooling passage together;
air passages (03) are arranged in a plurality of axial slots uniformly distributed on the outer surface of the stator core (14);
the air passages (03) and the inner surface of the shell (11) form an air cooling passage together;
a wave fan (04) is arranged on the motor rotating shaft (16) close to the liquid outlet hole (13);
the wave fan (04) is used for: rotating with the motor shaft (16) to provide a gas-cooled gas; and compresses the rotor (15) to prevent the end portion from deforming.
2. The bi-directional cooling structure of a dual medium hybrid motor according to claim 1, wherein: the stator iron core (14) is connected with the stator iron core (14) by a plurality of radial fastening screws (05) penetrating through the casing (11) from the outer surface of the casing (11) to play a role in fixing the stator iron core (14);
arranging n multiplied by m radial fastening screws (05) at intervals of 360/n degrees in the circumferential direction of the shell (11), wherein m is the number of the radial fastening screws (05) uniformly distributed in the same axial direction, and n is the number of rows;
a plurality of axial fastening screws (06) axially penetrate through the stator core (14) to fasten the silicon steel sheet of the stator core (14);
h axial fastening screws (06) are arranged at intervals of 360/h degrees in the circumferential direction of the stator core (14).
3. The bi-directional cooling structure of a dual medium hybrid motor of claim 2, wherein: the liquid channel (02) is a straight liquid channel (21) or a snake-shaped liquid channel (22).
4. The bi-directional cooling structure of a dual medium hybrid motor of claim 3, wherein: k straight liquid channels (21) are uniformly distributed along the circumferential direction in the shell (11); the positions of the straight liquid channels (21) correspond to the positions of k tooth parts or stator slots on the stator iron core (14) one by one; the k straight liquid channels (21) are communicated by an annular liquid groove (01) arranged at the front end and the rear end of the machine shell (11).
5. The bi-directional cooling structure of a dual medium hybrid motor of claim 3, wherein: the plurality of snake-shaped liquid channels (22) are separated into n fan-shaped symmetrical structures of 360/n degrees by n rows of radial fastening screws (05);
the snakelike liquid channels (22) in each fan-shaped symmetrical structure are arranged in a snakelike surrounding way along the circumferential direction of the machine shell (11);
the n snake-shaped liquid channels (22) are communicated by an annular liquid groove (01) arranged at the front end and the rear end of the machine shell (11).
6. The bi-directional cooling structure of a dual medium hybrid motor according to claim 1, wherein: the air passage (03) is a flat air passage (31), a semicircular air passage (32) or a triangular air passage (33);
the cross-sectional shape of the flat air passage (31) is as follows: a rectangle shape; the cross-sectional shape of the semicircular air passage (32) is as follows: semicircular; the cross-sectional shape of the triangular air passage (33) is as follows: and (4) a triangle.
7. The bi-directional cooling structure of a dual medium hybrid motor of claim 6, wherein: the positions of the air passages (03) correspond to the positions of the k tooth parts on the stator iron core (14) one by one;
the width of the flat air channel (31) is the same as that of the teeth (41);
the diameter of the semicircular air channel (32) is the same as the width of the teeth (41);
the opening edge of the triangular air channel (33) is the same as the width of the teeth (41).
8. The bi-directional cooling structure of a dual medium hybrid motor of claim 6, wherein: the positions of the air passages (03) correspond to the positions of the k stator slots on the stator core (14) one by one;
the width of the flat air passage (31) is the same as that of the stator slot body (42);
the diameter of the semicircular air passage (32) is the same as the width of the stator slot body (42);
the opening edge of the triangular air channel (33) is the same as the width of the stator slot body (42).
9. The bi-directional cooling structure of a dual medium hybrid motor according to claim 1, wherein: the wave fan (04) is of a circumferential symmetrical structure, j fan-shaped wave blades (51) with intervals of 360/j degrees are uniformly distributed on the edge of the circumference, one end of the outward extending edge of each fan-shaped wave blade (51) is lower than the other end of the outward extending edge of each fan-shaped wave blade (51), and the end with the high extending edge is of a sawtooth-shaped or arc-shaped structure.
10. A cooling method using the bi-directional cooling structure of the dual medium hybrid motor as claimed in any one of claims 1 to 9, comprising the steps of:
s1, cooling liquid flows into the annular liquid tank (01) from the liquid inlet (12), then enters the liquid channel (02), finally flows out of the motor from the liquid outlet (13) through the annular liquid tank (01) at the other end to form a forward liquid cooling passage, so that the liquid medium is cooled;
s2, when the motor runs, the wave fan (04) synchronously rotates along with the motor rotating shaft (16) to drive gas in the motor cavity to rotate and flow, and the generated axial cooling gas flows out of the motor cavity through the gas channel (03) to form a reverse gas cooling passage, so that the gas medium of the motor is cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111621969.7A CN114400820A (en) | 2021-12-28 | 2021-12-28 | Two-medium mixed motor bidirectional cooling structure and cooling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111621969.7A CN114400820A (en) | 2021-12-28 | 2021-12-28 | Two-medium mixed motor bidirectional cooling structure and cooling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114400820A true CN114400820A (en) | 2022-04-26 |
Family
ID=81229158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111621969.7A Pending CN114400820A (en) | 2021-12-28 | 2021-12-28 | Two-medium mixed motor bidirectional cooling structure and cooling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114400820A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003018772A (en) * | 2001-06-29 | 2003-01-17 | Toshiba Corp | Rotary electric machine having air-cooled structure |
| CN103199652A (en) * | 2013-03-13 | 2013-07-10 | 北京交通大学 | Gas-liquid interlaced cooling high power density motor |
| US20150028727A1 (en) * | 2011-10-13 | 2015-01-29 | Mitsubishi Electric Corporation | Rotary electric machine |
| JP2016036234A (en) * | 2014-08-04 | 2016-03-17 | 株式会社東芝 | Rotary electric machine |
| WO2021114606A1 (en) * | 2019-12-12 | 2021-06-17 | 中车永济电机有限公司 | Air- and water-cooled high-power permanent magnet traction motor having a hanging structure |
-
2021
- 2021-12-28 CN CN202111621969.7A patent/CN114400820A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003018772A (en) * | 2001-06-29 | 2003-01-17 | Toshiba Corp | Rotary electric machine having air-cooled structure |
| US20150028727A1 (en) * | 2011-10-13 | 2015-01-29 | Mitsubishi Electric Corporation | Rotary electric machine |
| CN103199652A (en) * | 2013-03-13 | 2013-07-10 | 北京交通大学 | Gas-liquid interlaced cooling high power density motor |
| JP2016036234A (en) * | 2014-08-04 | 2016-03-17 | 株式会社東芝 | Rotary electric machine |
| WO2021114606A1 (en) * | 2019-12-12 | 2021-06-17 | 中车永济电机有限公司 | Air- and water-cooled high-power permanent magnet traction motor having a hanging structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103280903B (en) | A kind of structure of electric machine stator iron and cooling means | |
| CN102290922B (en) | Double-fed wind generator | |
| CN203352307U (en) | Structure of motor stator core and cooling device of motor stator | |
| US8648505B2 (en) | Electrical machine with multiple cooling flows and cooling method | |
| WO2022027742A1 (en) | Integrated air-cooled axial flux motor | |
| JP2003204643A (en) | Tapered air gap between rotor and stator for superconducting synchronous machine | |
| US11611253B2 (en) | Rotor of motor and automobile | |
| CN211266684U (en) | Permanent magnet motor with impeller arranged on end plate and electric vehicle using same | |
| CN111969767A (en) | Motor cooling system and motor | |
| CN115733325A (en) | Axial flux motor with built-in rotor of centrifugal fan and oil-cooled stator | |
| US20240213852A1 (en) | Permanent magnet motor with high-efficiency air-water mixed cooling system | |
| CN113315298A (en) | Air-cooling and water-cooling combined cooling motor | |
| CN218276240U (en) | Oil-cooled motor | |
| CN114400820A (en) | Two-medium mixed motor bidirectional cooling structure and cooling method | |
| CN219812038U (en) | Multifunctional air-cooled motor | |
| CN219420500U (en) | Internal circulation air-cooling heat dissipation structure of motor | |
| CN207339512U (en) | A kind of split type and electric machine casing with coolant flow channel and there is its motor | |
| CN215934547U (en) | Motor and electrical equipment | |
| CN115459494A (en) | High-efficient oil-cooled motor | |
| CN213585315U (en) | Light high-speed large-capacity air-water cooling synchronous generator | |
| CN210380472U (en) | Water-cooling machine shell with internal circulation wind path | |
| CN113323908A (en) | Air compressor machine, air conditioner and car | |
| CN108847751B (en) | Air cooling system of driving motor for new energy automobile | |
| CN112467948A (en) | Double-rotor composite motor | |
| CN214900539U (en) | Novel air cooling structure of large-scale air compressor driving motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |