Compact high-speed motor with self-heat-dissipation structure
By setting up a compact heat dissipation structure with arc blades and wheel hubs on a high-speed motor, combined with the heat dissipation vents of the front end cover, an axial heat dissipation vent is formed, which solves the problem of limited heat dissipation of the motor and significantly improves the heat dissipation performance and service life.
Patent Information
- Application Number
- CN202420889733.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-26
AI Technical Summary
During operation, the existing motors have limited heat dissipation, which leads to an increase in temperature, affecting the performance of parts. In the existing technology, the heat dissipation method mainly relies on the limited heat dissipation holes on the fan blades and end caps, and cannot effectively reduce the motor temperature.
A compact high-speed motor with self-heating structure is designed. By setting arc blades and wheel hubs on the rear cover, combined with the heat dissipation vents of the front end cover, a natural axial heat dissipation vent is formed to improve the heat dissipation performance.
It achieves a large degree of heat dissipation, improves the heat dissipation performance of the motor, reduces temperature, extends service life, simplifies the component structure, and improves installation reliability and production efficiency.
Smart Images
Figure CN222169460U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a compact high-speed motor with a self-heating structure. Background Art
[0002] During the operation of the motor, as the use time increases, the heat generated by the motor will cause the temperature inside the motor to gradually increase, thereby affecting the working performance of the internal parts of the motor. To address this problem, a cooling fan is currently added to the motor to dissipate heat.
[0003] For example, on July 18, 2012, a patent with the publication number CN102594023A, entitled "A Self-Cooling Motor", was published. The patent includes a housing, a stator and a motor shaft. The housing has an end cover, and the outer side of the end cover is provided with a fan blade for drawing air from the inside of the housing to the outside. The motor shaft is vertically connected to a circuit board, and a heat insulation board is provided between the circuit board and the stator. A first heat dissipation hole is provided on the heat insulation board. The self-cooling effect of the motor product of this patent is better, and it can take away the heat of the motor itself more quickly to reduce the temperature of the motor. However, in the above documents, the heat dissipation method adopted is the heat dissipation holes of limited size on the fan blades and the end cover, which cannot dissipate heat to a large extent and the heat dissipation is limited. Summary of the invention
[0004] In view of this, the purpose of the utility model is to provide a compact high-speed motor with a self-heating structure to solve the problem of limited heat dissipation of the motor.
[0005] Based on the above purpose, the utility model provides a compact high-speed motor with a self-heating structure, including a motor body, the motor body is connected to a rotating shaft, and a front cover and a rear cover are respectively provided at both ends of the motor body. A plurality of heat dissipation vents are opened at equal angles on the front cover, and the heat dissipation vents extend from the end wall of the front cover to the side wall of the front cover. A hub is provided in the middle part of the rear cover and is sleeved on the rotating shaft, and a plurality of arc-shaped blades are provided at equal angles between the hub and the outer wall of the rear cover.
[0006] Optionally, a ratio of a root chord length of the blade connected to the outer side wall of the hub to a head chord length of the blade connected to the inner side wall of the rear cover is in a range of 0.8-0.9.
[0007] Optionally, the ratio of the outer wall diameter of the hub to the inner wall diameter of the outer shell of the rear cover is in the range of 0.42-0.45.
[0008] Optionally, the number of blades is a prime number.
[0009] Optionally, the number of blades is five, seven or nine.
[0010] Optionally, the motor body also includes a stator core sleeved on the rotating shaft, the stator core is located between the front cover and the rear cover, the stator core is outermostly provided with a rotor shell, a plurality of magnets sleeved on the outer wall of the stator core are equiangularly arranged in the rotor shell, a plurality of spacer columns are equiangularly arranged on a side of the rear cover close to the magnets, and the spacer columns are inserted between two adjacent magnets.
[0011] Optionally, the stator core is a coated stator, the inner diameter of the stator core is a bearing inner chamber, and an inner bearing sleeved on the rotating shaft is arranged in the bearing inner chamber.
[0012] Optionally, a sleeve sleeved on the rotating shaft is fixedly provided on the front end cover, the sleeve extends into the stator core, the sleeve and the rear cover are connected via an inner bearing arranged in the bearing inner chamber, the side of the sleeve away from the inner bearing is loosely fitted with the stator core, and the other side of the sleeve is tightly fitted with the stator core, a glue storage groove is provided in the middle of the sleeve, glue is stored in the glue storage groove, and the middle of the sleeve is glued to the stator core by glue.
[0013] Optionally, a bearing outer chamber is provided in the middle of a side of the front end cover away from the stator core, an outer bearing sleeved on the rotating shaft is provided in the bearing outer chamber, and a shaft retaining spring is provided on the inner diameter of the outer bearing.
[0014] The beneficial effects of the utility model: the utility model provides a compact high-speed motor with a self-heating structure, in which the blades are arranged on the rear cover to make the motor body more compact. In addition, the heat dissipation vents of the front cover are used to form a natural axial heat dissipation ventilation duct when the motor body is started and the shaft is driven to rotate, thereby forming a good heat dissipation system, which can dissipate heat to a greater extent, improve the heat dissipation performance, and make the heat dissipation condition better. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;
[0017] Figure 2 It is a schematic diagram of the cross-sectional explosion structure of the utility model;
[0018] Figure 3It is a schematic diagram of the explosion structure of the utility model;
[0019] Figure 4 It is a structural schematic diagram of the back cover of the utility model;
[0020] Figure 5 It is a structural schematic diagram of the front end cover of the utility model.
[0021] In the figure: 1. front cover; 11. heat dissipation vent; 12. shaft retaining ring; 13. outer bearing; 14. bearing outer chamber; 2. stator core; 3. rotor shell; 31. magnet; 4. rotating shaft; 5. rear cover; 51. blades; 52. spacer column; 53. wheel hub; 54. rubber storage tank; 6. inner bearing. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0023] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0024] like Figures 1 to 5 As shown, a compact high-speed motor with a self-heating structure includes a motor body, the motor body is connected to a rotating shaft 4, and a front cover 1 and a rear cover 5 are respectively provided at both ends of the motor body. A plurality of heat dissipation vents 11 are opened at equal angles on the front cover 1, and the heat dissipation vents 11 extend from the end wall of the front cover 1 to the side wall of the front cover 1. A hub 53 sleeved on the rotating shaft 4 is provided in the middle part of the rear cover 5, and a plurality of arc-shaped blades 51 are provided at equal angles between the hub 53 and the outer wall of the rear cover 5.
[0025] The blades 51 are arranged on the rear cover 5, so that the motor body is more compact. In combination with the heat dissipation vents 11 of the front cover 1, a natural axial heat dissipation ventilation duct is formed when the motor body starts to drive the rotating shaft 4 to rotate, thereby forming a good heat dissipation system and improving the heat dissipation performance. In addition, the motor body has a simple structure, which improves the reliability of installation and thus improves production efficiency.
[0026] The ratio of the root chord length of the blade 51 connected to the outer wall of the hub 53 to the head chord length of the blade 51 connected to the inner wall of the rear cover 5 is in the range of 0.8-0.9, which increases the wind guiding effect of the blade 51, so that a good heat dissipation effect is formed when the motor body runs at high speed, reduces the temperature rise of the motor body, and increases the service life of the motor body.
[0027] The ratio of the outer wall diameter of the hub 53 to the inner wall diameter of the outer shell of the rear cover 5 is in the range of 0.42-0.45, so that the blades 51 have sufficient mechanical strength and impact resistance and can withstand high-speed operation and emergency stop of the motor body without breaking.
[0028] The number of the blades 51 is a prime number, so that the dynamic balance of the rotor of the motor body is easy to correct. The number of the blades 51 can be five, seven or nine, which ensures that the motor body has sufficient air volume to dissipate heat while making less noise when the motor body is running. The spiral angle of the blades 51 of the rear cover 5 and the number of the blades 51 can be designed according to the actual application speed. The more blades 51 there are, the smaller the noise is, but the wind force is smaller. The larger the blades 51, the greater the air volume is.
[0029] The motor body also includes a stator core 2 sleeved on the rotating shaft 4, the stator core 2 is located between the front cover 1 and the rear cover 5, the stator core 2 is outer-mounted with a rotor shell 3, and the rotor shell 3 has multiple magnets 31 sleeved on the outer wall of the stator core 2 arranged at equal angles.
[0030] A plurality of spacer columns 52 are arranged at equal angles on one side of the rear cover 5 close to the magnetic steel 31. The spacer columns 52 are inserted between two adjacent magnetic steels 31. The number of the spacer columns 52 is consistent with that of the magnetic steels 31. By increasing the spacer columns 52 circumferentially arranged between the magnetic steels 31, uniform gaps between the magnetic steels 31 are ensured, while the requirement for the motor body to resist shear force at high speed is enhanced. In addition, the rear cover 5 is facilitated to better cooperate with the rotor shell 3, the axial distance is reduced, and the motor body is made more compact.
[0031] The stator core 2 is a coated stator, and the inner diameter of the stator core 2 is a bearing chamber. The bearing chamber is provided with an inner bearing 6 sleeved on the rotating shaft 4. The stator core 2 uses a coated stator for winding, cancels the setting of the existing stator frame, and uses the inner diameter of the stator core 2 as a bearing chamber for accommodating the inner bearing 6, which simplifies the structure of components, reduces the axial size, optimizes the installation of the whole machine, reduces the front frame by 5mm and the rear frame by 5mm, thereby further reducing the axial distance by 10mm.
[0032] A sleeve sleeved on the rotating shaft 4 is fixedly provided on the front end cover 1, and the sleeve extends into the stator core 2. The sleeve and the rear cover 5 are connected via an inner bearing 6 provided in the bearing inner chamber. The side of the sleeve away from the inner bearing 6 is loosely fitted with the stator core 2, and the other side of the sleeve is tightly fitted with the stator core 2. A glue storage groove 54 is provided in the middle of the sleeve, and glue is stored in the glue storage groove 54. The middle of the sleeve is glued to the stator core 2 by glue.
[0033] The side of the sleeve on the front end cover 1 that extends into the stator core 2 away from the rear cover 5 is loosely fitted with the stator core 2 to serve as a guide, and a glue storage tank 54 for placing glue is added in the middle of the sleeve to fix the connection, and the other side of the sleeve can be tightly fitted with the stator core 2 to ensure that the stator core 2 and the front end cover 1 are reliably connected.
[0034] A bearing outer chamber 14 is provided in the middle of a side of the front end cover 1 away from the stator core 2. An outer bearing 13 sleeved on the rotating shaft 4 is provided in the bearing outer chamber 14. A shaft retaining spring 12 is provided on the inner diameter of the outer bearing 13. When the motor body is running at high speed, the shaft retaining spring 12 is used as a bearing stop to avoid the outer bearing 13 being fixed by glue as much as possible, so as to avoid the failure of the glue under high temperature conditions, which may cause the hidden danger of axial displacement of the outer bearing 13.
[0035] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.
[0036] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A compact high-speed motor with a self-heating structure, comprising a motor body, characterized in that: The motor body is connected to a rotating shaft (4), and a front cover (1) and a rear cover (5) are respectively provided at both ends of the motor body. A plurality of heat dissipation vents (11) are provided on the front cover (1) at equal angles, and the heat dissipation vents (11) extend from the end wall of the front cover (1) to the side wall of the front cover (1). A hub (53) sleeved on the rotating shaft (4) is provided in the middle of the rear cover (5), and a plurality of arc-shaped blades (51) are provided at equal angles between the hub (53) and the outer wall of the rear cover (5).
2. A compact high-speed motor with a self-heating structure according to claim 1, characterized in that: The ratio of the root chord length of the blade (51) connected to the outer wall of the hub (53) to the head chord length of the blade (51) connected to the inner wall of the rear cover (5) is in the range of 0.8-0.
9.
3. A compact high-speed motor with a self-heating structure according to claim 1, characterized in that: The ratio of the outer wall diameter of the wheel hub (53) to the inner wall diameter of the outer shell of the rear cover (5) is in the range of 0.42-0.
45.
4. A compact high-speed motor with a self-heating structure according to claim 1, characterized in that: The number of the blades (51) is a prime number.
5. A compact high-speed motor with a self-heating structure according to claim 4, characterized in that: The number of the blades (51) is five, seven or nine.
6. A compact high-speed motor with a self-heating structure according to claim 1, characterized in that: The motor body further comprises a stator core (2) sleeved on the rotating shaft (4), the stator core (2) being located between the front cover (1) and the rear cover (5), the stator core (2) being provided with a rotor shell (3) on its outer shell, a plurality of magnetic steels (31) sleeved on the outer side wall of the stator core (2) being arranged at equal angles in the rotor shell (3), a plurality of spacer columns (52) being arranged at equal angles on a side of the rear cover (5) close to the magnetic steels (31), the spacer columns (52) being inserted between two adjacent magnetic steels (31).
7. A compact high-speed motor with a self-heating structure according to claim 6, characterized in that: The stator core (2) is a coated stator, the inner diameter of the stator core (2) is a bearing inner chamber, and an inner bearing (6) sleeved on the rotating shaft (4) is arranged in the bearing inner chamber.
8. A compact high-speed motor with a self-heating structure according to claim 7, characterized in that: A sleeve sleeved on the rotating shaft (4) is fixedly arranged on the front end cover (1), and the sleeve is arranged in the stator core (2). The sleeve and the rear cover (5) are connected via an inner bearing (6) arranged in the bearing inner chamber. The side of the sleeve away from the inner bearing (6) is loosely fitted with the stator core (2), and the other side of the sleeve is tightly fitted with the stator core (2). A glue storage groove (54) is provided in the middle of the sleeve, and glue is stored in the glue storage groove (54). The middle of the sleeve is glued to the stator core (2) by glue.
9. A compact high-speed motor with a self-heating structure according to claim 6, characterized in that: A bearing outer chamber (14) is provided in the middle of a side of the front end cover (1) which is away from the stator core (2). An outer bearing (13) sleeved on the rotating shaft (4) is provided in the bearing outer chamber (14). A shaft retaining spring (12) is provided on the inner diameter of the outer bearing (13).