Self-heat-dissipation structure of high-speed permanent magnet motor
By designing a self-heating structure and utilizing a combination of heat dissipation blades and lubricating oil, the problem of heat accumulation in high-speed permanent magnet motors during high-speed operation is solved, achieving long-term stable operation and extended lifespan of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-12
- Publication Date
- 2026-03-24
Smart Images
Figure CN224037217U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to high -speed permanent magnet motor heat dissipation technical field, concretely is a kind of high -speed permanent magnet motor self-heat dissipation structure. BACKGROUND
[0002] High-speed permanent magnet motor is a kind of permanent magnet material replaces traditional electric excitation winding as rotor excitation source, and rated speed is significantly higher than conventional motor, high-speed permanent magnet motor is widely used in aerospace, high-speed precision machine tool, new energy vehicle drive, high-end pump valve and other key fields with high power density, high efficiency, fast dynamic response and other core advantages. With the upgrading of industrial equipment to high speed, miniaturization, energy saving, higher requirements for the speed, power and long-term operation stability of high-speed permanent magnet motor are put forward.
[0003] But the existing high-speed permanent magnet motor when high-speed operation, stator winding loss, rotor eddy current loss and mechanical friction will produce a large amount of heat, if heat dissipation is not timely, internal temperature is easy to accumulate quickly, not only will lead to permanent magnet magnetic property attenuation, demagnetization, but also will accelerate coil insulation layer aging, seriously affect motor operation reliability;At the same time, output shaft as core transmission component, the problem of friction loss under long-term high-speed rotation, further limits the service life and working condition adaptation range of high-speed permanent magnet motor.
[0004] In view of this, we propose a kind of high-speed permanent magnet motor self-heat dissipation structure. INVENTION CONTENTS
[0005] The utility model aims at providing a kind of high-speed permanent magnet motor self-heat dissipation structure, the high-speed permanent magnet motor self-heat dissipation structure, solve the problem that the existing high-speed permanent magnet motor when high-speed operation, stator winding loss, rotor eddy current loss and mechanical friction will produce a large amount of heat, thereby limit the service life and working condition adaptation range of high-speed permanent magnet motor.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] A kind of high-speed permanent magnet motor self-heat dissipation structure, including high-speed permanent magnet motor body, the high-speed permanent magnet motor body is rotatably connected with output shaft;Further including heat dissipation component, for the internal heat dissipation of high-speed permanent magnet motor body;Extrusion component, for the surface of output shaft is oiled;The heat dissipation component includes: heat dissipation blade, the heat dissipation blade is installed on the surface of output shaft, the surface of the output shaft is installed with fixed ring, the fixed ring outside is installed with fixed plate, the fixed plate inboard is hinged with movable rod, the movable rod surface is installed with pendulum ball, the movable rod surface is provided with moving ring, the moving ring is slidably connected in the inside of high-speed permanent magnet motor body, the moving ring top is installed with connecting plate, the connecting plate top is installed with heat dissipation plate, the heat dissipation plate is slidably connected in the inside of high-speed permanent magnet motor body.
[0008] Preferably, a reset spring is mounted outside the connecting plate and inside the high-speed permanent magnet motor body.
[0009] Preferably, a volute spring is mounted on the top of the movable rod and on the top of the fixed plate.
[0010] Preferably, the extrusion assembly comprises a rotating shaft mounted on the surface of the output shaft, a sliding rod in surface sliding connection with the rotating shaft, and a contact block mounted on the surface of the sliding rod.
[0011] Preferably, a fixed strip is mounted inside the high-speed permanent magnet motor body, a lubricating oil bottle is mounted inside the fixed strip, and the contact block is in sliding connection inside the fixed strip.
[0012] Preferably, a conduit is mounted on the surface of the lubricating oil bottle, a sealing cover is mounted on the surface of the high-speed permanent magnet motor body, the conduit penetrates through the sealing cover, and the conduit is attached to the outer wall of the output shaft.
[0013] Preferably, an arc-shaped sliding groove is formed on the surface of the rotating shaft, the conduit is in L-shaped cross section, and an arc-shaped recess is formed on the surface of the sealing cover.
[0014] By means of the above technical scheme, the self-heat dissipation structure of the high-speed permanent magnet motor is provided.
[0015] (1) The heat dissipation assembly is arranged, when the output shaft rotates, the surface heat dissipation blades rotate at high speed synchronously, the air flow in the motor is accelerated to form air circulation, the internal heat is diffused quickly, at the same time, the centrifugal force generated by the rotation of the output shaft acts on the swing ball, drives the movable rod to swing outward with the hinge point of the fixed plate, pushes the moving ring to slide along the motor body in the axial direction, and drives the heat dissipation plate to move synchronously through the connecting plate. The sliding of the heat dissipation plate increases the contact area with the air, when the motor speed changes or stops, the reset spring and the volute spring release the elastic potential energy, drive each component to reset, prepare for the next heat dissipation cycle, avoid the demagnetization of the permanent magnet and the aging of the coil insulation due to high temperature accumulation during long-term use of the motor, and ensure the stability and reliability of long-term operation.
[0016] (2) The utility model discloses a setting extrusion subassembly, when the output shaft rotates, the surface pivot synchronous rotation of it, the arc -shaped sliding slot on the pivot guides the sliding of slide bar, drives the reciprocating movement of the abutment block in the fixed strip, and repeatedly extrudes the lubricating oil bottle in the inside. Under the action of pressure, lubricating oil flows out through L-shaped conduit, and the conduit penetrates the sealing cover and is attached output shaft outer wall, ensures the accurate delivery of lubricating oil, this process can avoid the abrasion, rust of output shaft due to the friction increase, and the jam, abnormal sound, overheat adhesion or jamming caused by the lubrication deficiency, reduces the heat of the rotation resistance, and can prolong the overall service life of output shaft and motor body. BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings, which are included to provide a further understanding of the utility model and constitute a part of the application, illustrate embodiments of the utility model and together with the description serve to explain the utility model:
[0018] Figure 1 It is the overall structure diagram of high -speed permanent magnet motor in the utility model Figure 1 ;
[0019] Figure 2 It is the overall structure diagram of high -speed permanent magnet motor in the utility model Figure 2 ;
[0020] Figure 3 It is the overall structure diagram of high -speed permanent magnet motor in the utility model Figure 3 ;
[0021] Figure 4 It is the internal structure diagram of high -speed permanent magnet motor in the utility model;
[0022] Figure 5 It is the structure diagram of heat dissipation subassembly in the utility model;
[0023] Figure 6 It is the structure diagram of extrusion subassembly in the utility model.
[0024] In the drawing: 1, high -speed permanent magnet motor body;2, output shaft;3, heat dissipation subassembly;31, heat dissipation blade;32, fixed ring;33, fixed plate;34, movable rod;35, swing ball;36, moving ring;37, connecting plate;38, heat dissipation plate;39, return spring;310, volute spring;4, extrusion subassembly;41, pivot;42, slide bar;43, abutment block;44, fixed strip;45, lubricating oil bottle;46, conduit;47, sealing cover;410, arc -shaped sliding slot;470, arc -shaped recess. DETAILED DESCRIPTION
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Example 1
[0027] A self-heating structure for high-speed permanent magnet motors, such as Figure 1 - Figure 5 As shown, it includes a high-speed permanent magnet motor body 1, and an output shaft 2 is rotatably connected inside the high-speed permanent magnet motor body 1;
[0028] It also includes a heat dissipation component 3, which is used to dissipate heat from the inside of the high-speed permanent magnet motor body 1;
[0029] The extrusion assembly 4 is used to apply oil to the surface of the output shaft 2;
[0030] First, the heat dissipation assembly 3 includes: heat dissipation blades 31, which are mounted on the surface of the output shaft 2. A fixing ring 32 is mounted on the surface of the output shaft 2. A fixing plate 33 is mounted on the outside of the fixing ring 32. A movable rod 34 is hinged to the inside of the fixing plate 33. A pendulum ball 35 is mounted on the surface of the movable rod 34. A moving ring 36 is provided on the surface of the movable rod 34. The moving ring 36 is slidably connected to the inside of the high-speed permanent magnet motor body 1. A connecting plate 37 is mounted on the top of the moving ring 36. A heat dissipation plate 38 is mounted on the top of the connecting plate 37. The heat dissipation plate 38 is slidably connected to the inside of the high-speed permanent magnet motor body 1. The high-speed rotation of the output shaft 2 directly drives the heat dissipation blades 31 to rotate synchronously, which quickly accelerates the air convection inside the motor to form a circulating airflow, thereby achieving the basic heat dissipation effect of rapidly dissipating the heat generated by the motor during operation to the outside.
[0031] Secondly, a reset spring 39 is installed on the outside of the connecting plate 37. The reset spring 39 is installed inside the high-speed permanent magnet motor body 1. Through the elastic deformation and reset force of the reset spring 39, when the motor speed decreases or stops, the connecting plate 37 and the moving ring 36 are pulled back to the initial position, so as to realize the effect of cyclic reset of the heat dissipation component 3 and prepare for the next heat dissipation.
[0032] Furthermore, a spiral spring 310 is installed on the top of the movable rod 34. The spiral spring 310 is installed on the top of the fixed plate 33. Through the energy storage and release characteristics of the spiral spring 310, the movable rod 34 is driven to quickly reset when the centrifugal force weakens, so as to avoid the movable rod 34 getting stuck due to inertia and achieve the effect of ensuring the flexibility of movement and cycle stability of the heat dissipation component 3.
[0033] In this embodiment, with the heat dissipation component 3, when the output shaft 2 rotates, the heat dissipation blades 31 on the surface rotate synchronously at high speed, accelerating the airflow inside the motor to form an airflow circulation, quickly dissipating internal heat and completing the initial heat dissipation. Simultaneously, the centrifugal force generated by the rotation of the output shaft 2 acts on the pendulum ball 35, causing the hinge point between the movable rod 34 and the fixed plate 33 to swing outwards, pushing the moving ring 36 to slide along the axial direction of the high-speed permanent magnet motor body 1, and driving the heat dissipation plate 38 to move synchronously through the connecting plate 37. The sliding of the heat dissipation plate 38 increases the contact area with the air and also disturbs the flow field to improve heat dissipation efficiency. When the motor speed changes or stops, the reset spring 39 and the spiral spring 310 release elastic potential energy, causing each component to reset, preparing for the next heat dissipation cycle, preventing demagnetization of the permanent magnet and aging of the coil insulation due to high temperature accumulation during long-term use of the motor, and ensuring the stability and reliability of long-term operation.
[0034] Example 2
[0035] like Figure 6 As shown, the extrusion assembly 4 includes: a rotating shaft 41, which is mounted on the surface of the output shaft 2, a slide rod 42 is slidably connected to the surface of the rotating shaft 41, and an abutment block 43 is mounted on the surface of the slide rod 42.
[0036] Furthermore, a fixing strip 44 is installed inside the high-speed permanent magnet motor body 1, and a lubricating oil bottle 45 is installed inside the fixing strip 44. The contact block 43 is slidably connected inside the fixing strip 44. Through the limiting and fixing effect of the fixing strip 44, the lubricating oil bottle 45 is stably fixed inside the motor, preventing it from being displaced due to motor vibration or component movement, thus ensuring the installation stability of the lubricating oil bottle 45.
[0037] Furthermore, a conduit 46 is installed on the surface of the lubricating oil bottle 45, and a sealing cover 47 is installed on the surface of the high-speed permanent magnet motor body 1. The conduit 46 passes through the sealing cover 47 and is attached to the outer wall of the output shaft 2. Through the guiding effect of the conduit 46 and the attached installation method, the lubricating oil squeezed out of the lubricating oil bottle 45 is accurately delivered to the surface of the output shaft 2. At the same time, the sealing cover 47 prevents lubricating oil leakage, achieving the dual effect of directional lubrication and clean protection.
[0038] Finally, an arc-shaped groove 410 is provided on the surface of the rotating shaft 41, and the cross-section of the guide tube 46 is L-shaped. Through the turning design of the L-shaped structure, it adapts to the internal installation space of the motor, ensuring smooth connection between the guide tube 46 and the lubricating oil bottle 45, and allowing the outlet of the guide tube 46 to accurately fit the surface of the output shaft 2, achieving the effect of efficient delivery of lubricating oil in a narrow space. An arc-shaped groove 470 is provided on the surface of the sealing cover 47. Through the guide contour of the arc-shaped groove 410, the slide rod 42 is guided to slide smoothly along the groove trajectory, converting the rotational motion of the rotating shaft 41 into the reciprocating linear motion of the slide rod 42, thereby achieving the effect of driving the contact block 43 to cyclically squeeze the lubricating oil bottle 45.
[0039] In this embodiment, by the setting of the extrusion assembly 4, when the output shaft 2 rotates, the surface of the rotating shaft 41 rotates synchronously, the arc-shaped sliding groove 410 on the rotating shaft 41 guides the sliding of the sliding rod 42, drives the abutting block 43 to reciprocate in the fixed strip 44, and repeatedly extrudes the internal lubricating oil bottle 45. Under the action of pressure, the lubricating oil flows out through the L-shaped conduit 46, the conduit 46 penetrates through the sealing cover 47 and is attached to the outer wall of the output shaft 2, ensuring accurate delivery of the lubricating oil. The arc-shaped groove 470 on the surface of the sealing cover 47 provides installation and movement space for the conduit 46, preventing damage to it, while also serving as a seal to prevent lubricating oil leakage and contamination of internal components of the motor. This process can avoid wear and tear, rust, and jamming, abnormal noise, overheating, sticking or jamming caused by insufficient lubrication, which not only reduces the heat generated by the rotating resistance, but also prolongs the overall service life of the output shaft 2 and the high-speed permanent magnet motor body 1.
[0040] Working principle: After the high-speed permanent magnet motor body 1 is started, the internal output shaft 2 will rotate at high speed. As the core power transmission component, the output shaft 2 directly drives the heat dissipation assembly 3 and the extrusion assembly 4 installed on its surface to operate synchronously without the need for an additional power source, achieving self-driven operation.
[0041] When the output shaft 2 rotates, the heat dissipation blades 31 fixed on its surface will rotate at high speed. During the rotation of the heat dissipation blades 31, the air flow inside the motor is accelerated, forming an air circulation that spreads the heat generated inside the motor to the outside, completing the initial heat dissipation. The centrifugal force generated by the rotation of the output shaft 2 acts on the surface of the swing ball 35, causing the swing ball 35 to drive the movable rod 34 to swing outward around the hinge point with the fixed plate 33. When the movable rod 34 swings, it pushes the moving ring 36 on the surface, causing the moving ring 36 to slide axially inside the high-speed permanent magnet motor body 1. The moving ring 36 drives the heat dissipation plate 38 to move synchronously through the connecting plate 37 on the top. The sliding of the heat dissipation plate 38 increases the contact area with the air inside the motor, while disturbing the air flow field, improving the heat dissipation efficiency. When the motor speed changes or stops, the reset spring 39 on the outside of the connecting plate 37 releases the elastic potential energy, pulling the connecting plate 37 and the moving ring 36 back to the initial position. The spiral spring 310 on the top of the movable rod 34 synchronously generates force, driving the movable rod 34 and the swing ball 35 to reset, preparing for the next heat dissipation cycle. This prevents the permanent magnet demagnetization and coil insulation aging caused by high temperature accumulation during long-term use of the high-speed permanent magnet motor body 1, improving the stability and reliability of the high-speed permanent magnet motor body 1 during long-term operation.
[0042] When the output shaft 2 rotates, the surface rotating shaft 41 rotates synchronously. The arc-shaped sliding groove 410 on the surface of the rotating shaft 41 guides the sliding rod 42 to slide along the arc-shaped sliding groove 410, thereby driving the abutting block 43 on the surface of the sliding rod 42 to reciprocate in the fixed strip 44. The abutting block 43 repeatedly extrudes the lubricating oil bottle 45 in the fixed strip 44 during the movement, so that the lubricating oil in the lubricating oil bottle 45 generates pressure. Under the action of the pressure, the lubricating oil flows out through the conduit 46 on the surface of the lubricating oil bottle 45. The cross section of the conduit 46 is L-shaped, penetrates through the sealing cover 47 and is attached to the outer wall of the output shaft 2, so as to ensure that the lubricating oil is accurately delivered to the surface of the output shaft 2. The arc-shaped groove 470 on the surface of the sealing cover 47 provides installation and movement space for the conduit 46, so as to avoid damage of the conduit 46 due to rotation of the output shaft or movement of the components. The sealing cover 47 simultaneously plays a sealing role to prevent leakage of the lubricating oil, so as to ensure the lubricating effect, avoid pollution of the internal components of the high-speed permanent magnet motor body 1, prevent surface wear and rust caused by increased friction when the output shaft 2 rotates at high speed for a long time, and prevent rotation jamming, abnormal sound, even avoid the failure of component overheating adhesion and jamming caused by insufficient lubrication, so as to reduce the heat generated by the rotation resistance of the output shaft 2, prolong the service life of the output shaft 2 and the whole high-speed permanent magnet motor body 1.
[0043] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that comprises a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article, or apparatus.
[0044] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A self-heating structure for a high-speed permanent magnet motor, comprising a high-speed permanent magnet motor body (1), characterized in that: The high-speed permanent magnet motor body (1) has an output shaft (2) rotatably connected inside. It also includes a heat dissipation component (3) for dissipating heat from the inside of the high-speed permanent magnet motor body (1); The extrusion assembly (4) is used to apply oil to the surface of the output shaft (2); The heat dissipation assembly (3) includes: heat dissipation blades (31), which are mounted on the surface of the output shaft (2). A fixing ring (32) is mounted on the surface of the output shaft (2). A fixing plate (33) is mounted on the outside of the fixing ring (32). A movable rod (34) is hinged to the inside of the fixing plate (33). A pendulum ball (35) is mounted on the surface of the movable rod (34). A moving ring (36) is provided on the surface of the movable rod (34). The moving ring (36) is slidably connected to the inside of the high-speed permanent magnet motor body (1). A connecting plate (37) is mounted on the top of the moving ring (36). A heat dissipation plate (38) is mounted on the top of the connecting plate (37). The heat dissipation plate (38) is slidably connected to the inside of the high-speed permanent magnet motor body (1).
2. The self-heating structure for a high-speed permanent magnet motor according to claim 1, characterized in that: A reset spring (39) is installed on the outside of the connecting plate (37), and the reset spring (39) is installed inside the high-speed permanent magnet motor body (1).
3. The self-heating structure for a high-speed permanent magnet motor according to claim 1, characterized in that: A spiral spring (310) is installed on the top of the movable rod (34), and the spiral spring (310) is installed on the top of the fixed plate (33).
4. The self-heating structure for a high-speed permanent magnet motor according to claim 1, characterized in that: The extrusion assembly (4) includes: a rotating shaft (41) mounted on the surface of the output shaft (2), a sliding rod (42) slidably connected to the surface of the rotating shaft (41), and an abutment block (43) mounted on the surface of the sliding rod (42).
5. The self-heating structure for a high-speed permanent magnet motor according to claim 4, characterized in that: The high-speed permanent magnet motor body (1) has a fixing strip (44) installed inside, and a lubricating oil bottle (45) is installed inside the fixing strip (44). The abutment block (43) is slidably connected inside the fixing strip (44).
6. The self-heating structure for a high-speed permanent magnet motor according to claim 5, characterized in that: The lubricating oil bottle (45) has a conduit (46) installed on its surface, and the high-speed permanent magnet motor body (1) has a sealing cover (47) installed on its surface. The conduit (46) passes through the sealing cover (47) and is attached to the outer wall of the output shaft (2).
7. The self-heating structure for a high-speed permanent magnet motor according to claim 6, characterized in that: The rotating shaft (41) has an arc-shaped groove (410) on its surface, the guide tube (46) has an L-shaped cross section, and the sealing cover (47) has an arc-shaped groove (470) on its surface.