CN109586496B - Motor rotating shaft structure, motor comprising same and heat dissipation method thereof - Google Patents
Motor rotating shaft structure, motor comprising same and heat dissipation method thereof Download PDFInfo
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- CN109586496B CN109586496B CN201710905179.9A CN201710905179A CN109586496B CN 109586496 B CN109586496 B CN 109586496B CN 201710905179 A CN201710905179 A CN 201710905179A CN 109586496 B CN109586496 B CN 109586496B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a motor rotating shaft structure, a motor comprising the structure and a heat dissipation method thereof, wherein the structure comprises the following components: a cylinder with a cavity inside; blades formed on the inner wall of the cylinder along the radial direction of the rotating shaft; the two side surfaces of the cylinder body along the axial direction of the rotating shaft are respectively provided with a first end plate and a second end plate, the first end plate is provided with a first through hole, and the second end plate is provided with a second through hole; the blades rotate along with the rotating shaft to form axial airflow in the cavity of the cylinder, the axial airflow forms air pressure difference on two sides of the cylinder along the axial direction of the rotating shaft, and circulation is achieved through the first through hole and the second through hole. The rotation of the rotating shaft drives the first end plate, the second end plate and the blades to form three-stage axial airflow inside the first end plate, the second end plate and the blades. The invention can solve the technical problems that a motor provided with a coaxial fan needs a large amount of axial space and the heat dissipation effect is poor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotating shaft structure of a totally-enclosed medium-sized motor capable of generating axial airflow, the motor comprising the structure and a heat dissipation method of the motor.
Background
The rotor is in the closed space formed by stator and front and back end covers, and the rotor iron core is mounted and fixed on the support of rotating shaft. When the motor runs, the heat generated by the rotor is circulated and ventilated by the interior of the motor and is carried to the stator or the base, and then the heat is dissipated by cooling the base through the exterior. At present, in a traditional motor heat dissipation mode, a centrifugal fan impeller is arranged at one end of a motor rotating shaft, and fan blades rotating along with a motor have the operation effect equivalent to that of a fan. The motor forms a fan when rotating to promote air circulation inside the motor.
In the prior art, the heat dissipation of a fully-closed motor, especially an ac motor with high power, mainly adopts the modes of an internal cooling circuit and an external cooling circuit, and how to dissipate the heat generated by a rotor to the external cooling circuit through the internal cooling circuit is a problem to be solved. As shown in fig. 1, the motor 22 includes a rotor, a stator core 19, a housing 20, and the like. The machine base 20 is provided with a stator air duct 21, and the end ring 16 of the rotor core 4 is provided with cast aluminum blades 5. The rotor includes pivot 1, and the inside of rotor is provided with rotor wind channel 17, and the one end in rotor wind channel 17 is provided with fan 18. In the existing mode, a coaxial fan is installed on a motor rotating shaft (or an independent fan is additionally installed in an internal cooling loop or a cast aluminum blade is additionally installed on a rotor cast aluminum end ring), circulating air flow is formed inside the motor, and heat is dissipated through heat exchange between the rotor and the air flow. The heat dissipation structure mainly has the following technical defects:
(1) installing a coaxial fan, wherein the axial size is required in the motor;
(2) if an external independent fan is added to the internal cooling circuit, the axial dimension (or height space) is also required outside the machine;
(3) if the end ring of the rotor core is additionally provided with the cast aluminum blade, the length of the blade is limited, and the heat dissipation effect is not ideal.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a motor shaft structure, a motor including the structure, and a heat dissipation method thereof, so as to solve the technical problems that the existing motor with a coaxial fan needs a large amount of axial space and the heat dissipation effect is poor.
In order to achieve the above object, the present invention specifically provides a technical implementation scheme of a motor rotating shaft structure, which includes:
a cylinder with a cavity inside;
blades formed on the inner wall of the cylinder along the radial direction of the rotating shaft;
a first end plate and a second end plate are respectively formed on two side surfaces of the cylinder body along the axial direction of the rotating shaft, a first through hole is formed in the first end plate, and a second through hole is formed in the second end plate;
the blades rotate along with the rotating shaft to form axial airflow in the cavity of the cylinder, the axial airflow forms air pressure difference on two sides of the cylinder along the axial direction of the rotating shaft, and circulation is achieved through the first through hole and the second through hole.
Preferably, a rotor core is attached to an outer surface of the cylinder, and a protrusion for fixing the rotor core on one side in an axial direction is provided on an outer periphery of the first end plate.
Preferably, a third through hole is formed in the cylinder along the axial direction of the rotating shaft, and the third through hole is communicated with the rotor core and the cavity, so that airflow in the cylinder directly contacts with the inner wall of the rotor core.
Preferably, 6-9 third through holes are formed in the barrel body along the axial direction of the rotating shaft, and the third through holes are uniformly distributed on the circumference of the barrel body.
Preferably, a core pressing ring for fixing the other side of the rotor core in the axial direction is disposed on the outer periphery of the second end plate.
Preferably, the axial direction of the first through hole is inclined at a certain angle with the axial direction of the rotating shaft, and the inclined direction of the first through hole is consistent with the inclined direction of the blade. When the rotating shaft rotates, axial airflow is formed on the outer side of the first end plate, and the axial airflow is consistent with the axial airflow formed by the blades in direction.
Preferably, the axial direction of the second through hole is inclined at a certain angle with the axial direction of the rotating shaft, and the inclined direction of the second through hole is consistent with the inclined direction of the blade. When the rotating shaft rotates, axial airflow is formed on the outer side of the second end plate, and the axial airflow is consistent with the axial airflow formed by the blades in direction.
Preferably, the cylinder has a cylindrical cavity, and the blades are arranged on the inner wall of the middle part of the cylinder and are uniformly distributed along the circumferential direction of the cylinder.
The invention also specifically provides a technical implementation scheme of the motor based on the rotating shaft structure, and the motor comprises the following components: the motor comprises a rotating shaft, a rotor core arranged on the outer surface of a cylinder of the rotating shaft, a stator core arranged on the periphery of the rotor core, and a base arranged on the periphery of the stator core. The motor base is internally provided with a stator air duct along the axial direction of the rotating shaft, and the rotating shaft rotates to form axial airflow inside the barrel body to pass through the stator air duct to realize air circulation inside the motor.
The invention also specifically provides a technical implementation scheme of the motor heat dissipation method based on the structure, and the motor heat dissipation method is characterized in that the cylinder rotates along with the rotating shaft, and the cylinder drives the blades to rotate to form the axial fan, so that axial airflow is generated inside the cylinder. The axial airflow forms air pressure difference at two ends of the rotating shaft and forms air circulation in the motor through a stator air duct arranged in a base of the motor. In the circulation process, the air exchanges heat with the rotor core and the engine base due to temperature difference, and therefore the rotor is cooled.
Preferably, when the rotating shaft rotates, an axial airflow is formed on the outer side of the first end plate, and the axial airflow is consistent with the axial airflow formed by the blades. When the rotating shaft rotates, axial airflow is formed on the outer side of the second end plate, and the axial airflow is consistent with the axial airflow formed by the blades and the first end plate in direction. The rotating shaft drives the first end plate, the second end plate and the blades to form three-stage axial airflow.
Preferably, when the rotating shaft rotates clockwise, the direction of the formed axial airflow is opposite to the direction of the formed axial airflow when the rotating shaft rotates counterclockwise.
Through the technical scheme of implementing the motor rotating shaft structure provided by the invention, the motor comprising the structure and the heat dissipation method thereof, the motor rotating shaft structure has the following beneficial effects:
(1) the rotating shaft structure directly utilizes the space of the bracket, installs the inner fan and forms axial airflow when rotating together with the rotating shaft, so that the axial space of the motor is more compact, more space can be saved in the length direction, and the heat dissipation effect is better;
(2) the rotating shaft structure can enable the heat dissipation of the rotor to be more sufficient, and particularly the inside of the rotor core is directly contacted with cooling air flow;
(3) the rotating shaft structure of the invention increases the speed of the axial airflow along with the increase of the rotating speed of the motor, and the cooling effect is better when the motor runs at high speed;
(4) the rotating shaft structure can form airflow in different directions along with different rotating directions of the rotating shaft.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other embodiments can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic longitudinal sectional view of a rotary shaft structure of a motor in the prior art;
FIG. 2 is a schematic longitudinal sectional view of the upper half of a rotor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a right side partial structure of a motor shaft structure according to an embodiment of the present invention;
FIG. 4 is a cross sectional view of a blade portion of an embodiment of a shaft structure of a motor according to the present invention;
FIG. 5 is a schematic structural diagram of a first through hole of a rotating shaft structure of a motor according to an embodiment of the present invention;
FIG. 6 is a schematic partial sectional view of a blade of a motor shaft structure according to an embodiment of the present invention;
FIG. 7 is a schematic view of a partial cross-sectional structure of an embodiment of a motor based on the rotating shaft structure of the present invention;
in the figure: 1-rotating shaft, 2-through hole I, 3-end plate I, 4-rotor core, 5-blade, 6-cylinder, 7-end plate II, 8-through hole II, 9-inner wall, 10-cavity, 11-permanent magnet, 12-core clamping ring, 13-protrusion, 14-inner wall, 15-through hole III, 16-end ring, 17-rotor air duct, 18-fan, 19-stator core, 20-machine base, 21-stator air duct, 22-motor and 30-rotor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2 to 7, specific embodiments of a motor rotating shaft structure, a motor including the structure, and a heat dissipation method thereof according to the present invention are shown, and the present invention will be further described with reference to the drawings and the specific embodiments.
Example 1
As shown in fig. 2, in a specific embodiment of a motor shaft structure, a shaft 1 includes:
a cylinder 6 having a cavity 10 therein;
two side surfaces of the cylinder 6 along the axial direction of the rotating shaft 1 are respectively provided with a first end plate 3 and a second end plate 7, the first end plate 3 is provided with a first through hole 2, and the second end plate 7 is provided with a second through hole 8;
the blades 5 rotate along with the rotating shaft 1 to form axial airflow in the cavity 10 of the cylinder 6, the axial airflow forms air pressure difference on two sides of the cylinder 6 along the axial direction of the rotating shaft 1, and circulation is achieved through the first through hole 2 and the second through hole 8.
The rotor core 4 is attached to the outer surface of the cylinder 6, and the outer periphery of the first end plate 3 is provided with a protrusion 13 for fixing the rotor core 4 on one side in the axial direction. A core pressing ring 12 for fixing the other side of the rotor core 4 in the axial direction is arranged on the outer periphery of the second end plate 7.
As shown in fig. 3, 4 and 5, a first through hole 2 is formed in an end plate 3 of the rotating shaft 1, and an axial direction of the first through hole 2 and an axial direction (a direction shown in fig. 2) of the rotating shaft 1 are inclined at a certain angle, so that an inner hole wall 14 of the first through hole 2 and the axial direction of the rotating shaft 1 form an included angle at a certain angle (that is, the inner hole wall 14 and the axial direction of the rotating shaft 1 are inclined at a certain angle). The blades 5 are also inclined at a certain angle, and the inclined direction of the first through holes 2 is consistent with the inclined direction of the blades 5. When the rotating shaft 1 rotates, axial airflow is formed on the outer side of the end plate I3, and the axial airflow is consistent with the axial airflow formed by the blades 5.
And a second through hole 8 is formed in the second end plate 7 of the rotating shaft 1, and the axis direction formed by the second through hole 8 and the axis direction of the rotating shaft 1 are inclined at a certain angle, so that an included angle formed by the inner hole wall of the second through hole 8 and the axis direction of the rotating shaft 1 is formed at a certain angle (namely, the inner hole wall and the axis direction of the rotating shaft 1 are inclined at a certain angle). The inclination direction of the second through hole 8 is consistent with the inclination direction of the blade 5. When the rotating shaft 1 rotates, axial airflow is formed on the outer side of the second end plate 7, and the axial airflow is consistent with the axial airflow formed by the blades 5.
The first end plate 3, the second end plate 7 and the blades 5 are driven by the rotation of the rotating shaft 1 to form three-stage axial airflow. Along with the increase of the rotating speed of the motor, the flow speed of the axial airflow is increased, and the cooling effect is better when the motor runs at a high speed. When the rotating shaft 1 rotates reversely, reverse airflow can be formed so as to adapt to the bidirectional rotation of the motor.
As shown in fig. 6, a third through hole 15 is formed in the cylinder 6 along the axial direction of the rotating shaft 1, and the third through hole 15 communicates the rotor core 4 and the cavity 10, so that the airflow in the cylinder 6 directly contacts the inner wall of the rotor core 4, which is particularly beneficial to cooling the rotor core 4, and the rotor 30 is cooled more sufficiently. As a typical embodiment of the invention, 6-9 through holes III 15 are formed in the cylinder 6 along the axial direction of the rotating shaft 1, and the through holes III 15 are uniformly distributed on the circumference of the cylinder 6.
Example 2
On the basis of embodiment 1, as shown in fig. 7, a specific embodiment of a motor includes: a rotary shaft 1 according to embodiment 1, a rotor core 4 mounted on an outer surface of a cylindrical body 6 of the rotary shaft 1, a stator core 19 disposed on an outer periphery of the rotor core 4, and a housing 20 disposed on an outer periphery of the stator core 19. A stator air duct 21 is arranged in the base 20 along the axial direction of the rotating shaft 1, and axial air flow formed inside the cylinder 6 by the rotation of the rotating shaft 1 realizes air circulation inside the motor 22 through the stator air duct 21.
In embodiment 1, a rotating shaft 1 with a hollow shaft structure is adopted, blades 5 of a radial fan are additionally arranged on an inner wall 9 of a cylinder 6 of the rotating shaft 1, the blades 5 rotate along with the rotating shaft 1 to form an axial fan, axial airflow is generated, an air pressure difference is formed at two ends of the rotating shaft 1, and air in a motor 22 is circulated by virtue of an axial stator air duct 21 in a base 20. The air is circulated to exchange heat with the rotor core 4 and the housing 20 due to a temperature difference, thereby cooling the rotor 30.
The rest of the technical solutions in more detail can specifically refer to the corresponding descriptions in embodiment 1.
Example 3
On the basis of embodiment 1, a specific embodiment of a motor heat dissipation method based on the structure described in embodiment 1 includes the following steps:
the cylinder 6 rotates along with the rotating shaft 1, and the cylinder 6 drives the blades 5 to rotate to form an axial fan, so that axial airflow is generated inside the cylinder 6;
the axial airflow forms air pressure difference at two ends of the rotating shaft 1 and forms air circulation in the motor 22 through a stator air duct 21 arranged in a base 20 of the motor 22;
during the circulation process, the air exchanges heat with the rotor core 4 and the base 20 due to the temperature difference, thereby cooling the rotor 30.
When the rotating shaft 1 rotates, axial airflow is formed on the outer side of the end plate I3, and the axial airflow is consistent with the axial airflow formed by the blades 5. When the rotating shaft 1 rotates, axial airflow is formed on the outer side of the second end plate 7, and the axial airflow is consistent with the axial airflow formed by the blades 5 and the first end plate 3. The rotation of the rotating shaft 1 drives the first end plate 3, the second end plate 7 and the blades 5 to form three-stage axial airflow.
As shown in fig. 2, when the rotating shaft 1 rotates clockwise, the axial airflow direction is formed from left (direction shown as L in the figure) to right (direction shown as R in the figure); when the rotating shaft 1 rotates in the counterclockwise direction, the axial airflow direction is from right to left.
By implementing the motor rotating shaft structure described in the specific embodiment of the invention, the technical scheme of the motor comprising the structure and the heat dissipation method thereof can produce the following technical effects:
(1) the motor rotating shaft structure described in the specific embodiment of the invention enables the axial space of the motor to be more compact, more space can be saved in the length direction, and the heat dissipation effect is better;
(2) the motor rotating shaft structure described in the specific embodiment of the invention can enable the heat dissipation of the rotor to be more sufficient, and particularly the interior of the rotor core is directly contacted with cooling air flow;
(3) the motor rotating shaft structure described in the specific embodiment of the invention has the advantages that the flow speed of axial airflow is increased along with the increase of the rotating speed of the motor, and the cooling effect is better when the motor runs at high speed.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a motor rotating shaft structure which characterized in that, pivot (1) adopts the hollow shaft structure and includes:
a cylinder (6) with a cavity (10) inside;
the blades (5) are formed on the inner wall (9) of the cylinder (6) along the radial direction of the rotating shaft (1);
two side surfaces of the cylinder (6) along the axial direction of the rotating shaft (1) are respectively provided with a first end plate (3) and a second end plate (7), the first end plate (3) is provided with a first through hole (2), and the second end plate (7) is provided with a second through hole (8);
the blades (5) rotate along with the rotating shaft (1) to form axial airflow in the cavity (10) of the cylinder (6), the axial airflow forms air pressure difference on two sides of the cylinder (6) along the axial direction of the rotating shaft (1), and circulation is achieved through the first through hole (2) and the second through hole (8);
the axial direction formed by the through hole I (2) and the axial direction of the rotating shaft (1) are inclined at a certain angle, and the inclined direction of the through hole I (2) is consistent with the inclined direction of the blade (5); when the rotating shaft (1) rotates, axial airflow is formed on the outer side of the first end plate (3), and the axial airflow is consistent with the axial airflow formed by the blades (5);
the axis direction of the second through hole (8) and the axis direction of the rotating shaft (1) are inclined at a certain angle, and the inclined direction of the second through hole (8) is consistent with the inclined direction of the blade (5); when the rotating shaft (1) rotates, axial airflow is formed on the outer side of the second end plate (7), and the axial airflow is consistent with the axial airflow formed by the blades (5);
the rotation of the rotating shaft (1) drives the first end plate (3), the second end plate (7) and the blades (5) to form three-stage axial airflow;
the axial airflow forms air pressure difference at two ends of the rotating shaft (1), and forms air circulation in the motor (22) through a stator air duct (21) arranged in a base (20) of the motor (22);
in the circulation process, the air exchanges heat with the rotor core (4) and the machine base (20) due to temperature difference, and therefore the rotor (30) is cooled.
2. The motor shaft structure according to claim 1, wherein: the rotor core (4) is mounted on the outer surface of the cylinder (6), and a protruding portion (13) used for fixing one side of the rotor core (4) in the axial direction is arranged on the periphery of the first end plate (3).
3. The motor shaft structure according to claim 2, wherein: a third through hole (15) is formed in the barrel (6) along the axial direction of the rotating shaft (1), and the third through hole (15) is communicated with the rotor core (4) and the cavity (10), so that airflow in the barrel (6) directly contacts the inner wall of the rotor core (4) to facilitate cooling of the rotor core (4) and the rotor (30).
4. The motor shaft structure according to claim 3, wherein: barrel (6) are gone up and are followed 6 ~ 9 through-holes three (15) have been seted up to the axial of pivot (1), through-hole three (15) are in equipartition on the circumference of barrel (6).
5. The motor shaft structure according to claim 3, wherein: and a core pressing ring (12) for fixing the other side of the rotor core (4) along the axial direction is arranged on the periphery of the second end plate (7).
6. The motor shaft structure according to any one of claims 1 to 5, wherein: the barrel (6) is provided with a cylindrical cavity (10), and the blades (5) are arranged on the inner wall (9) in the middle of the barrel (6) and are uniformly distributed along the circumferential direction of the barrel (6).
7. An electric machine, comprising: a rotating shaft (1) according to any one of claims 1 to 6, a rotor core (4) mounted on an outer surface of a cylinder (6) of the rotating shaft (1), a stator core (19) arranged on an outer periphery of the rotor core (4), and a housing (20) arranged on an outer periphery of the stator core (19); the motor base (20) is internally provided with a stator air duct (21) along the axial direction of the rotating shaft (1), and the rotating shaft (1) rotates to form axial airflow inside the barrel (6) to pass through the stator air duct (21) to realize air circulation inside the motor (22).
8. A motor heat dissipation method based on the structure of any one of claims 1 to 6, characterized in that:
the barrel (6) rotates along with the rotating shaft (1), and the barrel (6) drives the blades (5) to rotate to form an axial fan, so that axial airflow is generated inside the barrel (6);
the axial airflow forms air pressure difference at two ends of the rotating shaft (1), and forms air circulation in the motor (22) through a stator air duct (21) arranged in a base (20) of the motor (22);
in the circulation process, the air exchanges heat with the rotor core (4) and the machine base (20) due to temperature difference, and therefore the rotor (30) is cooled.
9. The motor heat dissipation method of claim 8, wherein: when the rotating shaft (1) rotates, axial airflow is formed on the outer side of the first end plate (3), and the axial airflow is consistent with the axial airflow formed by the blades (5); when the rotating shaft (1) rotates, axial airflow is formed on the outer side of the second end plate (7), and the axial airflow is consistent with the axial airflow formed by the blades (5) and the first end plate (3); the rotating shaft (1) rotates to drive the first end plate (3), the second end plate (7) and the blades (5) to form three-stage axial airflow.
10. The motor heat dissipation method of claim 9, wherein: when the rotating shaft (1) rotates in the clockwise direction, the formed axial airflow direction is opposite to the axial airflow direction formed when the rotating shaft (1) rotates in the anticlockwise direction.
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| CN201710905179.9A CN109586496B (en) | 2017-09-29 | 2017-09-29 | Motor rotating shaft structure, motor comprising same and heat dissipation method thereof |
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| CN113809855B (en) * | 2020-06-15 | 2022-09-06 | 东元电机股份有限公司 | Rotor structure with multiple differential pressure generating assemblies |
| CN111585414B (en) * | 2020-07-01 | 2021-07-23 | 嵊州市非标链轮有限公司 | High-speed motor with stable heat dissipation |
| CN117856534B (en) * | 2024-03-08 | 2024-05-28 | 成都学尚科技有限公司 | Shaftless motor |
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| US20040036367A1 (en) * | 2002-01-30 | 2004-02-26 | Darin Denton | Rotor cooling apparatus |
| CN101263642A (en) * | 2005-09-16 | 2008-09-10 | 西门子公司 | Electrical machine having permanent magnets |
| CN204089478U (en) * | 2014-09-09 | 2015-01-07 | 台州欧非机电科技有限公司 | Heat-dissipation motor |
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