Permanent magnet motor end cover structure with cooling function

Abstract

This invention relates to the field of motor technology, specifically to an end cover structure for a permanent magnet motor with cooling function. The structure includes: an end cover body with a bearing chamber on one side; and a scraping heat-conducting mechanism for breaking the static oil film and effectively conducting heat. The scraping heat-conducting mechanism includes a heat-conducting ring, which is rotatably connected to the interior of the end cover body. By incorporating components such as the scraping heat-conducting mechanism, the friction contact between the friction block and the friction ring drives the heat-conducting ring to rotate, causing the scraping element to continuously scrape away the static oil film between the bearing chamber and the outer ring of the bearing. Combined with the deformation of the shape memory alloy strip as temperature changes, this pushes the heat-conducting block tightly against the outer ring of the bearing, thereby significantly reducing thermal resistance and improving heat conduction efficiency. This achieves the goal of actively breaking the oil film and improving heat dissipation during motor operation, effectively solving the problem of poor heat dissipation caused by oil film obstruction in traditional end covers.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically to an end cover structure for a permanent magnet motor with a cooling function. Background Technology

[0002] The end cover structure of a permanent magnet motor with cooling function is an end cover structure of a permanent magnet motor that integrates cooling channels, heat dissipation fins or heat exchange components, replacing the traditional end cover; it quickly dissipates the heat generated by the motor operation by means of cooling medium flow or heat conduction, reduces internal temperature rise, improves the operating stability and power density of the permanent magnet motor, and is suitable for high load conditions.

[0003] Traditional permanent magnet motor end cover heat dissipation structures, when faced with high loads and instantaneous impact loads, suffer from significant thermal resistance due to the static oil film between the bearing and the end cover. Furthermore, this static oil film forms a "thermal response hysteresis layer" during sudden temperature changes, causing heat to accumulate rapidly in the bearing area and creating instantaneous high-temperature hotspots. Existing heat dissipation solutions, such as simply adding cooling channels, heat dissipation fins, or using phase change materials, mostly focus on handling stable or slow temperature rise processes, making it difficult to quickly and actively break down the aforementioned thermal hysteresis layer and achieve timely heat dissipation. This makes adjacent permanent magnets susceptible to irreversible thermal demagnetization due to localized overheating, severely impacting the motor's peak performance and lifespan, causing inconvenience in practical use, and reducing the overall effectiveness of the permanent magnet motor end cover. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a permanent magnet motor end cover structure with cooling function, which can effectively solve the prominent problems in existing technologies, such as the formation of a high thermal resistance heat stagnation layer by a static oil film at the bearing in traditional permanent magnet motor end covers, leading to instantaneous heat accumulation, sluggish heat dissipation response, and a high risk of overheating and demagnetization of permanent magnets.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a permanent magnet motor end cover structure with cooling function, comprising: an end cover structure body, wherein a bearing chamber is formed on one side of the end cover structure body, and further comprising: A scraping heat-conducting mechanism for effectively conducting heat by breaking a static oil film includes a heat-conducting ring rotatably connected to the interior of the end cap structure. A return spring is fixedly connected to the outer side of the heat-conducting ring and elastically connected to the end cap structure. A connecting groove is provided inside the heat-conducting ring, and a heat-conducting block is slidably connected inside the connecting groove. A scraping component is fixedly connected to the inner side of the heat-conducting block. A shape memory alloy strip is elastically connected to the outer side of the heat-conducting block via a compression spring and is hinged to the interior of the heat-conducting ring. A compression heat-absorbing component is provided inside the shape memory alloy strip. A connecting block is provided on one side of the shape memory alloy strip. A friction block is elastically connected to the bottom of the connecting block via a damping spring and is slidably connected to the connecting block. A friction ring is provided inside the friction block and is fixedly connected to the motor output shaft. A moving wobbling component is provided on the outer side of the friction ring.

[0006] Furthermore, the scraping component includes a movable block, which is fixedly connected to the heat-conducting block. A scraper is elastically connected to the outer side of the movable block via a compression spring, and the scraper is slidably connected to the movable block. A fixing plate is provided on the outer side of the scraper, and several sets of arc-shaped unidirectional protrusions are fixedly connected to the inner side of the fixing plate. An elastic scraper is provided on the inner side of the heat-conducting ring, and the elastic scraper is fixedly connected to the outer ring of the bearing.

[0007] Furthermore, the extrusion heat absorption assembly includes a heat absorption block, which is hinged to a shape memory alloy strip and slidably connected to the top of a heat conduction block. A heat insulation box is slidably connected to the outside of the heat absorption block, and the heat insulation box is fixedly connected to a heat conduction ring. A phase change block is provided inside the heat insulation box, and a heat conduction mesh plate is fixedly connected inside the heat insulation box.

[0008] Furthermore, a pushing heat-absorbing plate is fixedly connected to the outer side of the heat-absorbing block, and a one-way heat-conducting plate is slidably connected to the outer side of the pushing heat-absorbing plate. The one-way heat-conducting plate is plugged into the heat-conducting ring, and the one-way heat-conducting block is slidably connected to the insulation box.

[0009] Furthermore, a micro switch is provided inside the end cap structure body, a trigger block is provided on one side of the micro switch, and the trigger block is slidably connected to one side of the heat insulation box. The trigger block is elastically connected to the heat insulation box through a connecting spring, and the heat insulation box is fixedly connected to the end cap structure body, and the heat insulation box is fixedly connected to the micro switch.

[0010] Furthermore, the micro switch is electrically connected to an alarm via a guide, and the alarm is fixedly connected to the end cap structure body.

[0011] Furthermore, the movable swaying component includes a support ring, and a guide groove is provided on the outer side of the support ring. A guide block is slidably connected inside the guide groove, and the guide block is fixedly connected to a friction block. A slider is fixedly connected to the outer side of the support ring, and the slider is slidably connected to the end cap structure body. A delayed reset post is elastically connected to one side of the slider. A flow ring is slidably connected to the outer side of the heat-conducting ring, and a cooling pipe is connected to one side of the flow ring. A circulation hose is connected to the other end of the flow ring through a one-way valve. A disturbance heat dissipation plate is fixedly connected to the outer side of the heat-conducting ring, and a disturbance heat dissipation block is connected to the outer side of the heat insulation box.

[0012] Furthermore, a disturbance tooth is fixedly connected to the inner side of the flow ring, and a flow impeller is rotatably connected to the inner side of the disturbance tooth.

[0013] Furthermore, it also includes a flow extrusion assembly for circulating heat dissipation. The flow extrusion assembly includes a cam, which is fixedly connected to a friction ring. A positioning box is provided on the top of the cam, and the interior of the positioning box is snapped into connection with a circulating hose. The top of the positioning box is slidably connected to the end cap structure body. The positioning box is hinged to a shape memory alloy strip. A movable spring is elastically connected to the top of the positioning box, and the movable spring is elastically connected to the end cap structure body. The other end of the circulating hose is connected to a cooling box, and the cooling box is connected to a cooling pipe.

[0014] Beneficial effects The technical solution provided by this invention has the following advantages compared with the known prior art: I. This invention, by setting up components such as a scraping heat-conducting mechanism, drives the heat-conducting ring to rotate through the frictional contact between the friction block and the friction ring. This causes the scraping component to continuously scrape away the static oil film between the bearing chamber and the outer ring of the bearing. Combined with the deformation effect of the shape memory alloy strip as the temperature changes, it pushes the heat-conducting block to adhere tightly to the outer ring of the bearing, thereby significantly reducing thermal resistance and improving heat conduction efficiency. This achieves the purpose of actively breaking the oil film and improving the heat dissipation effect during motor operation, effectively solving the problem of poor heat dissipation caused by oil film obstruction in traditional end covers.

[0015] II. This invention, by incorporating components such as an extrusion heat-absorbing assembly, a micro switch, and an alarm, enables the heat-absorbing block to contact the heat-conducting block when the shape memory alloy strip moves to a certain position. Heat is then efficiently absorbed and stored through the phase change block. Simultaneously, a unidirectional heat-conducting plate ensures unidirectional heat dissipation, preventing heat backflow. The micro switch, in conjunction with the trigger block, can trigger the alarm in case of abnormal temperature. This constitutes an intelligent temperature control and safety warning system, which not only enhances the continuity and stability of the heat dissipation system but also enables real-time monitoring and abnormal warning of the heat dissipation status, improving the safety and maintainability of motor operation.

[0016] Third, this invention, by setting up components such as a moving shaking component and a flow extrusion component, causes the support ring and heat-conducting ring to move when the friction block moves, disturbing the flow of coolant; at the same time, the cam rotates with the motor output shaft, cyclically extruding the circulating hose, pushing the cooling medium to circulate between the cooling box, cooling pipe and flow ring, achieving dynamic heat dissipation; the shape memory alloy strip can also adjust the position of the positioning box to achieve adaptive adjustment of the coolant flow rate; thus, it enhances the fluidity and adaptability of the heat dissipation system, ensuring efficient and uniform heat dissipation under different loads, and further improving the thermal management capability and operational reliability of the permanent magnet motor under high load conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the interior of the end cap structure of the present invention; Figure 3 This is a schematic diagram of the scraping heat conduction mechanism of the present invention; Figure 4 This is a schematic diagram of the scraping component of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the extrusion heat absorption component of the present invention; Figure 7 This is a schematic diagram of the heat-absorbing plate and the unidirectional heat-conducting plate of the present invention; Figure 8 This is a schematic diagram of the heat insulation box of the present invention; Figure 9 This is a schematic diagram of the moving and shaking component of the present invention; Figure 10 This is a schematic diagram of the flow extrusion assembly of the present invention.

[0019] Reference numerals: 1. End cap structure body; 2. Scraping heat conduction mechanism; 201. Heat conduction ring; 202. Return spring; 203. Heat conduction block; 204. Scraper; 2041. Movable block; 2042. Scraper strip; 2043. Fixing plate; 2044. Arc-shaped unidirectional protrusion; 2045. Elastic scraper; 205. Shape memory alloy strip; 206. Extrusion heat absorption assembly; 2061. Heat absorption block; 2062. Heat insulation box; 2063. Phase change block; 2064. Heat conduction mesh plate; 207. Connecting block; 208. Friction block; 209. Friction ring ; 210. Moving and shaking assembly; 2101. Support ring; 2102. Guide block; 2103. Slider; 2104. Delayed reset column; 2105. Flow ring; 2106. Cooling pipe; 2107. Circulation hose; 2108. Disturbing heat sink; 2109. Disturbing heat sink block; 3. Pushing heat absorption plate; 4. One-way heat conduction plate; 5. Micro switch; 6. Trigger block; 7. Insulation box; 8. Alarm; 9. Disturbing tooth; 10. Flow impeller; 11. Flow extrusion assembly; 111. Cam; 112. Positioning box; 113. Cooling box. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] See attached document Figure 1-10A permanent magnet motor end cover structure with cooling function includes: an end cover structure body 1, a bearing chamber on one side of the end cover structure body 1, and a scraping heat conduction mechanism 2 for breaking the static oil film and effectively conducting heat. The scraping heat conduction mechanism 2 includes a heat conduction ring 201, which is rotatably connected to the inside of the end cover structure body 1. A return spring 202 is fixedly connected to the outside of the heat conduction ring 201 and elastically connected to the end cover structure body 1. A connecting groove is formed inside the heat conduction ring 201, and a heat conduction block 203 is slidably connected inside the connecting groove. A scraper 204 is provided on the inner side of the heat conduction block 203 to scrape away the oil and prevent the oil from affecting heat conduction. A shape memory alloy is elastically connected to the outside of the heat conduction block 203 by a compression spring. The shape memory alloy strip 205 is internally hinged to the heat-conducting ring 201. The inner side of the shape memory alloy strip 205 is provided with an extrusion heat absorption component 206, which is used to store heat through the phase change material to achieve rapid heat absorption and heat buffering at high temperatures. A connecting block 207 is provided on one side of the shape memory alloy strip 205. The bottom of the connecting block 207 is elastically connected to a friction block 208 through a damping spring. The friction block 208 is slidably connected to the connecting block 207. A friction ring 209 is provided on the inner side of the friction block 208. The friction ring 209 is fixedly connected to the motor output shaft. A moving swaying component 210 is provided on the outer side of the friction ring 209, which is used to drive the heat-conducting ring 201 to sway through the movement of the friction block 208, disturb the flow of coolant, and improve the uniformity and efficiency of heat dissipation. During motor operation, the shape memory alloy strip 205 deforms with the temperature change in the bearing area. This deformation not only works with the compression spring to push the heat-conducting block 203 but also moves the connecting block 207. This causes the friction block 208 to adhere to the friction ring 209, which is fixed to the motor output shaft, under the action of the damping spring. The friction block 208 and the connecting block 207 are slidably connected. The friction generated by the rotation drives the heat-conducting ring 201 to rotate inside the end cover structure 1. The return spring 202 can quickly push the heat-conducting ring 201 to return to its original position. The connecting groove provides a stable sliding space for the heat-conducting block 203. The scraper 204 on the inner side of the heat-conducting block 203 effectively breaks the static oil film as the heat-conducting ring 201 rotates, significantly reducing thermal resistance and allowing the heat-conducting block 203 to efficiently transfer the heat generated by the bearing. Heat is transferred to the shape memory alloy strip 205, and the heat-conducting ring 201 also absorbs the heat generated by the bearing. As the scraper 204 breaks the static oil film, the thermal resistance is greatly reduced, which also enhances the heat absorption effect of the heat-conducting ring 201 on the bearing. When the heat is high, the continuous movement of the shape memory alloy strip 205 triggers the extrusion heat-absorbing component 206 to absorb too much heat, preventing the temperature from rising continuously. The moving and shaking component 210 assists the heat-conducting ring 201 to further agitate and accelerate the heat transfer speed. This not only achieves the dual effect of breaking the static oil film and efficient heat conduction, but also solves the problem of insufficient heat dissipation efficiency caused by the oil film obstruction of the traditional end cover and the accumulation of heat in the bearing area when the motor is under high load. This significantly improves the stability and service life of the permanent magnet motor. See attached document Figure 2-5 The scraper 204 is used to scrape away the oil to prevent it from affecting heat conduction. It includes a movable block 2041, which is made of a heat-conducting material such as copper. It is used to absorb the heat of the outer ring of the bearing and transfer it to the heat-conducting block 203. The movable block 2041 is fixedly connected to the heat-conducting block 203. The outer side of the movable block 2041 is elastically connected to a scraper 2042 by a compression spring. The scraper 2042 is slidably connected to the movable block 2041. A fixed plate 2043 is provided on the outer side of the scraper 2042. Several sets of arc-shaped one-way protrusions 2044 are fixedly connected on the inner side of the fixed plate 2043. An elastic scraper 2045 is provided on the inner side of the heat-conducting ring 201, and the elastic scraper 2045 is fixedly connected to the outer ring of the bearing. The movable block 2041 is fixedly connected to the heat-conducting block 203, providing a stable installation foundation for the scraper 2042 and precisely transmitting the power of the heat-conducting block 203 to the scraper 2042, ensuring that the scraper 2042 and the heat-conducting block 203 always move synchronously. A compression spring is elastically connected between the movable block 2041 and the scraper 2042. When the scraper 2042 scrapes the static oil film, several sets of arc-shaped one-way protrusions 2044 on the inner side of the fixed plate 2043 increase the scraping resistance using their arc structure, causing the compression spring to compress. After compression to a certain extent, the compression spring releases its elasticity, quickly pushing the oil film towards one side of the connecting groove. This pushed and squeezed oil flows outward onto the fixed plate 2043, while the arc-shaped one-way protrusions 2041... The gap between 44 allows the oil to flow smoothly, preventing oil accumulation from hindering heat conduction. When the scraper 2042 resets, the arc-shaped one-way protrusion 2044 reduces reset resistance, allowing the scraper 2042 to reset smoothly. Combined with the reciprocating motion of the heat-conducting ring 201, the oil can be continuously pushed in the designated direction. At the same time, the elastic scraper 2045 is fixed to the outer ring of the bearing, which can promptly scrape off the oil adsorbed on the surface of the heat-conducting ring 201 during the reciprocating motion of the heat-conducting ring 201, effectively preventing the oil from forming a static oil film again, further reducing thermal resistance, and ensuring the efficient transfer of heat from the bearing by the heat-conducting block 203 and the heat-conducting ring 201. This solves the problem of oil film accumulation affecting heat dissipation in traditional end covers and improves the heat dissipation stability and efficiency of the permanent magnet motor end cover. See attached document Figure 3-9 The extrusion heat absorption component 206 is used to store heat through phase change material to achieve rapid heat absorption and heat buffering at high temperatures. It includes a heat absorption block 2061, which is hinged to a shape memory alloy strip 205. The heat absorption block 2061 is slidably connected to the top of the heat conduction block 203. A heat insulation box 2062 is slidably connected to the outside of the heat absorption block 2061, and the heat insulation box 2062 is fixedly connected to the heat conduction ring 201. A phase change block 2063 is provided inside the heat insulation box 2062. The phase change block 2063 is existing technology and can be selected from paraffin wax, etc. A heat conduction mesh plate 2064 is fixedly connected inside the heat insulation box 2062. When the shape memory alloy strip 205 is heated to a certain extent, the heat absorber 2061, which is hinged to the shape memory alloy strip 205 and can slide with the heat conductor 203, moves the heat absorber 2061 to the top of the heat conductor 203 and forms a stable sliding connection, thereby efficiently receiving the bearing heat transferred by the heat conductor 203. The heat insulation box 2062 is fixedly connected to the heat conductor ring 201, effectively preventing the heat from the heat conductor ring 201 from entering the interior of the heat insulation box 2062, ensuring targeted heat transfer. The heat exchange plate 2064 further increases the contact area with the phase change block 2063 inside the heat insulation box 2062, which greatly improves the heat conduction efficiency. After absorbing heat, the phase change block 2063 will undergo a phase change reaction and store a large amount of heat, which will quickly absorb the heat transferred by the bearing. This not only significantly reduces the heat accumulation in the bearing area under high temperature conditions, but also solves the problem that high temperature heat is difficult to transfer and store quickly and the heat dissipation is not continuous in traditional end cover heat dissipation. This makes the heat dissipation effect of the permanent magnet motor end cover more efficient and stable, and adaptable to high load operation requirements. The heat-absorbing block 2061 is fixedly connected to a pushing heat-absorbing plate 3 on its outer side. A one-way heat-conducting plate 4 is slidably connected to the outer side of the pushing heat-absorbing plate 3. The one-way heat-conducting plate 4 is plugged into the heat-conducting ring 201 and slidably connected to the heat insulation box 2062. When the shape memory alloy strip 205 moves, it will drive the heat-absorbing block 2061 to move synchronously. The pushing heat-absorbing plate 3 on the outer side of the heat-absorbing block 2061 will move in conjunction with it, thereby pushing the one-way heat-conducting plate 4 to form a stable plug-in connection with the heat-conducting ring 201. The one-way heat-conducting plate 4 has directional heat conduction characteristics. It can efficiently guide the heat absorbed and stored by the phase change block 2063 to the heat-conducting ring 201, and firmly prevent the heat from flowing back into the heat insulation box 2062. This avoids heat loss and solves the problem of heat return causing a decrease in heat dissipation efficiency and limited heat absorption capacity of the phase change block 2063 in traditional heat dissipation. This allows the phase change block 2063 to maintain a high-efficiency heat absorption state and further improves the heat dissipation continuity and stability of the end cover structure. The end cap structure 1 contains a micro switch 5, which is a prior art technology. A trigger block 6 is located on one side of the micro switch 5, and the trigger block 6 is slidably connected to one side of the heat insulation box 2062. The trigger block 6 is elastically connected to the heat insulation box 7 via a connecting spring, and the heat insulation box 7 is fixedly connected to the end cap structure 1 and the micro switch 5. The heat insulation box 7, fixed to the end cap structure 1, provides reliable heat insulation protection for the internal micro switch 5, preventing the high temperatures generated by the motor from affecting the normal operation of the micro switch 5. The stability of the fault detection mechanism is improved; the trigger block 6 is slidably connected to the heat insulation box 2062, and the connecting spring provides it with a stable elastic restoring force. When the phase change block 2063 absorbs heat, it will expand and directly push the trigger block 6. Once the temperature is too high or the heat dissipation structure is abnormal, the trigger block 6 can trigger the micro switch 5 in time to realize accurate abnormal detection of the heat dissipation system. This solves the problem that the end cover of the traditional permanent magnet motor lacks an effective heat dissipation abnormality monitoring mechanism and it is difficult to warn of overheating risks in advance. This adds protection to the safe operation of the motor and reduces motor damage caused by heat dissipation failure. Among them, the micro switch 5 is electrically connected to the alarm 8 through the guide. The alarm 8 is existing technology and is fixedly connected to the end cover structure body 1. The trigger block 6 can accurately trigger the micro switch 5 to realize real-time abnormal detection of the heat dissipation system. The micro switch 5 is electrically connected to the alarm 8 fixed on the end cover structure body 1 through the guide. When the heat dissipation system has excessive temperature or abnormal operation, the trigger block 6 triggers the micro switch 5, and the alarm 8 will immediately issue a clear warning signal, which will promptly remind the staff to check the fault and facilitate quick inspection and maintenance. This solves the problem that the end cover of the traditional permanent magnet motor lacks a timely early warning mechanism for heat dissipation abnormalities and is prone to motor damage due to delayed handling of faults. It effectively ensures the safe and stable operation of the permanent magnet motor. See attached document Figure 1-10The movable oscillating component 210 is used to move the friction block 208 to drive the heat-conducting ring 201 to oscillate, disturbing the flow of coolant and improving the uniformity and efficiency of heat dissipation. It includes a support ring 2101, with a guide groove on its outer side. A guide block 2102 is slidably connected inside the guide groove and is fixedly connected to the friction block 208. A slider 2103 is fixedly connected to the outer side of the support ring 2101 and is slidably connected to the end cap structure body 1. A delayed reset post 2104 is elastically connected to one side of the slider 2103, and the delayed reset post 2104 is used to reset the slider 2103. During the delayed sliding, a flow ring 2105 is slidably connected to the outer side of the heat conduction ring 201, and a cooling pipe 2106 is connected to one side of the flow ring 2105. The other end of the flow ring 2105 is connected to a circulation hose 2107 through a one-way valve. The interior of the flow ring 2105 includes a baffle for water isolation, so that the coolant is discharged through the circulation hose 2107 after flowing one revolution. The one-way valve is used to guide the liquid in the flow ring 2105 into the interior of the circulation hose 2107 in one direction. A disturbance heat dissipation plate 2108 is fixedly connected to the outer side of the heat conduction ring 201, and a disturbance heat dissipation block 2109 is connected to the outer side of the heat insulation box 2062. The guide block 2102 is fixedly connected to the friction block 208. The guide groove on the outer side of the support ring 2101 provides a stable sliding path for the guide block 2102. When the friction block 208 moves, it drives the guide block 2102 to slide with the guide groove, thereby driving the support ring 2101 to adjust its position. The delayed reset post 2104 allows the support ring 2101 to achieve delayed reset after sliding. At the same time, the friction block 208 will also move upward under the action of the guide groove. At this time, the friction block 208 slowly resets under the action of the damping spring and will not reconnect with the friction ring 209. The heat-conducting ring 201 will reciprocate under the elastic force of the reset spring 202. The flow ring 2105 slides with the heat-conducting ring 201 to cool. Pipe 2106 and circulating hose 2107 together form a complete cooling medium channel. The agitator plate 2108 rotates synchronously with the swing of the heat conduction ring 201, effectively agitating the coolant between the heat conduction ring 201 and the flow channel, breaking the static state of the coolant and improving heat dissipation efficiency. At the same time, the agitator block 2109 is connected to the heat insulation box 2062, which can quickly dissipate the heat stored in the heat insulation box 2062 into the coolant. Combined with the continuous flow of the cooling medium, it achieves efficient heat transfer, solving the problem of slow coolant flow and insufficient heat exchange in traditional end cover heat dissipation. It further enhances the uniformity and stability of overall heat dissipation, allowing the permanent magnet motor to maintain good temperature control under high load conditions. The inner side of the flow ring 2105 is fixedly connected to a disturbance tooth 9, and the inner side of the disturbance tooth 9 is rotatably connected to a flow impeller 10. The disturbance tooth 9 is fixed to the inner side of the flow ring 2105, which not only provides a stable installation support for the flow impeller 10, but also changes its trajectory when the coolant flows, breaking the steady flow state and forming local turbulence, thereby increasing the contact frequency and depth between the coolant and the flow ring 2105 and the disturbance heat sink 2108. The flow impeller 10 is rotatably connected to the inner side of the disturbance tooth 9, and rotates flexibly under the impact force of the coolant flow or the linkage action of the heat conduction ring 201. During the rotation, it actively stirs the coolant in the flow ring 2105, and even if the heat does not reach the threshold for contact between the friction block 208 and the friction ring 209, it can still stir the coolant. The static liquid layer in the flow ring 2105 avoids local temperature accumulation caused by slow flow. The disturbance tooth 9 and the flow impeller 10 form a double disturbance, which not only improves the flow speed and uniformity of the coolant in the flow ring 2105, but also significantly increases the heat exchange area between the coolant and the disturbance heat sink 2108 and the disturbance heat sink 2109. This allows the coolant to efficiently absorb the heat transferred by the heat conduction ring 201 and the heat dissipation box 2062, effectively solving the pain points of slow local flow and insufficient heat exchange of the coolant in traditional cooling systems. It further enhances the overall heat dissipation efficiency of the end cover structure, ensuring that the cooling medium can continuously and stably remove the heat generated by the motor operation, and providing a reliable guarantee for the long-term stable operation of the permanent magnet motor under high load conditions. See attached document Figure 1-10 It also includes a flow extrusion assembly 11 for circulating heat dissipation. The flow extrusion assembly 11 includes a cam 111, which is fixedly connected to a friction ring 209. A positioning box 112 is provided on the top of the cam 111, and the interior of the positioning box 112 is snapped into connection with the circulating hose 2107. It is worth noting that the relevant snapping structure is prior art, and the snap-fit ​​or other existing technologies can be selected (not shown in the figure). The top of the positioning box 112 is slidably connected to the end cap structure body 1. The positioning box 112 is hinged to the shape memory alloy strip 205. A movable spring is elastically connected to the top of the positioning box 112, and the movable spring is elastically connected to the end cap structure body 1. The other end of the circulating hose 2107 is connected to a cooling box 113. The cooling box 113 is prior art and can cool the coolant inside it. The cooling box 113 is connected to the cooling pipe 2106. The cam 111 is fixedly connected to the friction ring 209. When the motor is running, the friction ring 209 will drive the cam 111 to rotate synchronously. The positioning box 112 is snapped into the circulation hose 2107 and its top is elastically connected to the end cover structure body 1 through a movable spring. The movable spring provides a stable elastic thrust to the positioning box 112, so that the cam 111 can repeatedly squeeze the circulation hose 2107 during rotation, efficiently promoting the flow of the internal cooling medium. The cooling box 113, cooling pipe 2106, and circulation hose 2107 are interconnected to form a complete circulation loop, allowing the cooling medium to continuously circulate in the pipe and quickly carry away the heat conduction ring. The heat transferred by 201 and the disturbance heat sink 2109 achieves efficient circulating heat dissipation; at the same time, the shape memory alloy strip 205 is hinged to the positioning box 112, which will drive the positioning box 112 to move with the temperature change, thereby adjusting the distance between the circulating hose 2107 and the cam 111, so that the flow speed of the cooling medium can be flexibly adapted according to the actual heat generation of the motor. This solves the problems of insufficient cooling medium flow power, fixed heat dissipation efficiency and inability to adapt to different heat generation conditions in traditional end cover heat dissipation, significantly improving the cooling efficiency and adaptability of permanent magnet motor end cover, and ensuring that the motor can maintain a good temperature state under different loads.

[0023] It is worth noting that all flow paths of the cooling medium (gas or liquid), including the connections between components such as cooling pipe 2106, circulating hose 2107, flow ring 2105, heat conduction ring 201 and cooling box 113, must adopt reliable static or dynamic sealing structures (such as O-rings, gaskets or mechanical seals) to completely prevent medium leakage and ensure the pressure stability and heat transfer efficiency of the closed cooling cycle. It is worth noting that the specific models and parameters (such as elastic coefficient, friction coefficient, wear resistance, etc.) of the elastic elements such as the return spring 202, compression spring, and damping spring, as well as key components such as the friction block 208 and scraper 2042 involved in this technical solution, should be rigorously selected and calculated based on the actual operating conditions of the motor (such as bearing heating power, cooling requirements, speed and load) to ensure its long-term performance and lifespan. The sliding and movement of each moving part (such as the heat conduction block 203, slider 2103, and positioning box 112) must be precisely guided and stroke limited by a reasonably designed guide groove, limit block, or guide rail (not fully shown in the figure). This is the basis for ensuring the coordinated function and reliable operation of each mechanism. In addition, depending on the actual use environment (such as dust and oil), protective covers or additional limit structures can be added to the relevant moving pairs. It is worth noting that the starting temperature of scraping and heat storage can be set by selecting shape memory alloy strips 205 with different phase change temperatures; the initial contact pressure of the heat-conducting block 203 can be set by adjusting the preload of the compression spring; and the oscillation frequency of the heat-conducting ring 201 can be adjusted by replacing the return spring 202 with different stiffness. This allows the solution to be flexibly adapted to motors of different models and operating conditions.

[0024] Working principle: During use, after the motor starts, the output shaft drives the friction ring 209 to rotate synchronously. Heat is generated in the bearing area, and the increased temperature causes the shape memory alloy strip 205 to deform. This deformation, on the one hand, works with the compression spring to push the heat-conducting block 203 to slide along the connecting groove of the heat-conducting ring 201, bringing the scraper 204 on the inner side of the heat-conducting block 203 closer to the outer ring of the bearing; on the other hand, it drives the connecting block 207 to move, allowing the friction block 208 to tightly adhere to the friction ring 209 under the elastic force of the damping spring. Because the friction block 208 and the connecting block 207 are slidably connected, the friction generated by the rotation of the friction ring 209 drives the heat-conducting ring 201 to rotate inside the end cap structure body 1, while the return spring 20... 2 will provide a reverse elastic force after the heat conduction ring 201 rotates, pushing it to quickly reset, thereby causing the heat conduction ring 201 to reciprocate. The scraper 204 will also continuously scrape the static oil film between the bearing chamber and the outer ring of the bearing, greatly reducing the thermal resistance, allowing the heat conduction block 203 to efficiently absorb the heat generated by the bearing and transfer it to the shape memory alloy strip 205. At the same time, the heat conduction ring 201 itself will also directly absorb the heat of the bearing, significantly improving the heat conduction efficiency. As the shape memory alloy strip 205 absorbs heat, it will continue to squeeze the compression spring, thereby making the scraper 204 contact the outer ring of the bearing more tightly, improving the scraping effect. The shape memory alloy strip 205 will also drive the heat absorption block 2061 to move. As the temperature continues to rise, the temperature threshold can be set according to actual usage requirements when it affects the use of the bearing. The shape memory alloy strip 205 absorbs heat, and when its deformation reaches a certain level, it will cause the heat-absorbing block 2061 and the top of the heat-conducting block 203 to form a stable sliding connection, efficiently receiving the heat transferred by the heat-conducting block 203. During this process, the heat-absorbing plate 3 on the outside of the heat-absorbing block 2061 is pushed synchronously, pushing the unidirectional heat-conducting plate 4 to form a stable insertion with the heat-conducting ring 201. The unidirectional heat-conducting plate 4, with its directional heat conduction characteristics, will... Heat is efficiently guided to the heat-conducting ring 201, while preventing heat from flowing back into the insulation box 2062, ensuring that the phase change block 2063 is continuously in a state of efficient heat absorption; the insulation box 2062, which is fixedly connected to the heat-conducting ring 201, can effectively prevent heat from entering the heat-conducting ring 201, and the internal heat-conducting mesh plate 2064 increases the contact area with the phase change block 2063. After absorbing heat, the phase change block 2063 undergoes a phase change reaction, quickly storing a large amount of heat, avoiding high temperature accumulation in the bearing area, and solving the problem of heat being difficult to transfer and store quickly in traditional heat dissipation. Meanwhile, during the movement of the friction block 208, the guide block 2102 fixedly connected to it slides along the guide groove on the outside of the support ring 2101, causing the support ring 2101 to slide on the end cover structure body 1 via the slider 2103. The delayed reset post 2104 allows the support ring 2101 to achieve delayed reset after sliding. At the same time, the friction block 208 moves upward under the action of the guide groove, and then slowly resets under the action of the damping spring. The heat conduction ring 201 continues to swing back and forth under the action of the reset spring 202, and the disturbance heat sink 2108 on its outer side rotates together, effectively disturbing the coolant between the heat conduction ring 201 and the flow ring 2105, breaking the static state of the coolant. When the motor output shaft drives the friction ring 209 to rotate, it interacts with the friction ring 209. The fixed cam 111 also rotates synchronously. The positioning box 112 is elastically connected to the end cover structure body 1 through a movable spring. During the rotation of the cam 111, it will repeatedly squeeze the circulation hose 2107 that is engaged with the positioning box 112, pushing the cooling medium to flow continuously in the complete loop composed of the cooling box 113, cooling pipe 2106, flow ring 2105 and circulation hose 2107. The disturbance heat dissipation block 2109 connected to the heat insulation box 2062 will dissipate the heat stored in the phase change block 2063 into the coolant, achieving efficient circulation heat dissipation. In addition, the shape memory alloy strip 205 will also drive the positioning box 112 to move with the temperature change, adjust the distance between the circulation hose 2107 and the cam 111, adaptively adjust the flow rate of the cooling medium, and flexibly adapt to different heat dissipation conditions. In addition, the heat insulation box 7 inside the end cover structure 1 provides reliable heat insulation protection for the micro switch 5, preventing the high temperature generated by the motor operation from affecting the normal operation of the micro switch 5. When the phase change block 2063 expands excessively due to excessive temperature or abnormal heat dissipation system, it will push the trigger block 6 that is slidably connected to it. The trigger block 6 overcomes the elastic force of the connecting spring and triggers the micro switch 5. The alarm 8 that is electrically connected to the micro switch 5 through the wire will immediately issue an alarm signal, promptly reminding the staff to check the fault, adding protection for the safe operation of the motor and reducing motor damage caused by heat dissipation failure.

[0025] In summary, this invention, through components such as the scraping heat conduction mechanism 2, the shape memory alloy strip 205, the extrusion heat absorption component 206, and the flow extrusion component 11, constitutes a collaborative heat dissipation system triggered by a temperature signal, with multiple mechanisms linked in sequence and functions interconnected. When a transient temperature rise occurs in the bearing area, the deformation of the shape memory alloy strip 205 serves as the sole initial trigger signal, simultaneously executing two key operations. It is worth noting that the shape memory alloy strip 205 moves continuously and gradually as the temperature rises. First, it drives the scraper 204 to immediately scrape off the oil film to establish a high-speed heat conduction path. Second, it pushes the heat absorption block 2061 to contact the heat conduction block 203 to activate the phase change heat storage unit, thereby achieving the simultaneous start-up of "instantaneous obstacle breaking" and "peak heat absorption". Subsequently, the stored heat is carried away by the cooling circulation system whose flow rate is regulated by the same shape memory alloy strip 205, completing the closed loop of "impact buffering - residual heat dissipation". This design effectively solves the systemic problem that traditional heat dissipation solutions cannot cope with instantaneous thermal shock.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A permanent magnet motor end cover structure with cooling function, comprising an end cover structure body (1), characterized in that: The end cap structure body (1) has a bearing chamber on one side, and also includes: A scraping heat conduction mechanism (2) for effectively conducting heat to break the static oil film includes a heat conduction ring (201), which is rotatably connected to the inside of the end cap structure body (1). A return spring (202) is fixedly connected to the outside of the heat conduction ring (201), and the return spring (202) is elastically connected to the end cap structure body (1). A connecting groove is provided inside the heat conduction ring (201), and a heat conduction block (203) is slidably connected inside the connecting groove. A scraping element (204) is provided on the inner side of the heat conduction block (203). A shape memory alloy strip is elastically connected to the outside of the heat conduction block (203) through a compression spring. (205), and the shape memory alloy strip (205) is internally hinged to the heat-conducting ring (201). An extrusion heat absorption component (206) is provided on the inner side of the shape memory alloy strip (205). A connecting block (207) is provided on one side of the shape memory alloy strip (205). A friction block (208) is elastically connected to the bottom of the connecting block (207) through a damping spring. The friction block (208) is slidably connected to the connecting block (207). A friction ring (209) is provided on the inner side of the friction block (208). The friction ring (209) is fixedly connected to the motor output shaft. A moving shaking component (210) is provided on the outer side of the friction ring (209).

2. The end cover structure for a permanent magnet motor with cooling function according to claim 1, characterized in that, The scraping component (204) includes a movable block (2041), which is fixedly connected to the heat-conducting block (203). A scraper (2042) is elastically connected to the outer side of the movable block (2041) by a compression spring, and the scraper (2042) is slidably connected to the movable block (2041). A fixing plate (2043) is provided on the outer side of the scraper (2042). Several sets of arc-shaped unidirectional protrusions (2044) are fixedly connected to the inner side of the fixing plate (2043). An elastic scraper (2045) is provided on the inner side of the heat-conducting ring (201), and the elastic scraper (2045) is fixedly connected to the outer ring of the bearing.

3. The end cover structure for a permanent magnet motor with cooling function according to claim 1, characterized in that, The extrusion heat absorption assembly (206) includes a heat absorption block (2061), which is hinged to a shape memory alloy strip (205). The heat absorption block (2061) is slidably connected to the top of a heat-conducting block (203). A heat insulation box (2062) is slidably connected to the outside of the heat absorption block (2061), and the heat insulation box (2062) is fixedly connected to a heat-conducting ring (201). A phase change block (2063) is provided inside the heat insulation box (2062), and a heat-conducting mesh plate (2064) is fixedly connected inside the heat insulation box (2062).

4. The end cover structure for a permanent magnet motor with cooling function according to claim 3, characterized in that, The heat-absorbing block (2061) is fixedly connected to a push heat-absorbing plate (3), and the push heat-absorbing plate (3) is slidably connected to a one-way heat-conducting plate (4). The one-way heat-conducting plate (4) is plugged into the heat-conducting ring (201), and the one-way heat-conducting plate (4) is slidably connected to the heat insulation box (2062).

5. The end cover structure for a permanent magnet motor with cooling function according to claim 3, characterized in that, The end cap structure body (1) is provided with a micro switch (5) inside. A trigger block (6) is provided on one side of the micro switch (5), and the trigger block (6) is slidably connected to one side of the heat insulation box (2062). The trigger block (6) is elastically connected to the heat insulation box (7) through a connecting spring. The heat insulation box (7) is fixedly connected to the end cap structure body (1), and the heat insulation box (7) is fixedly connected to the micro switch (5).

6. The end cover structure for a permanent magnet motor with cooling function according to claim 5, characterized in that, The micro switch (5) is electrically connected to an alarm (8) via a guide, and the alarm (8) is fixedly connected to the end cap structure body (1).

7. The end cover structure for a permanent magnet motor with cooling function according to claim 1, characterized in that, The movable swaying assembly (210) includes a support ring (2101), and a guide groove is provided on the outer side of the support ring (2101). A guide block (2102) is slidably connected inside the guide groove, and the guide block (2102) is fixedly connected to the friction block (208). A slider (2103) is fixedly connected to the outer side of the support ring (2101), and the slider (2103) is slidably connected to the end cap structure body (1). One side of the slider (2103) is elastically connected. There is a delayed reset column (2104), the outer side of the heat-conducting ring (201) is slidably connected to a flow ring (2105), and one side of the flow ring (2105) is connected to a cooling pipe (2106), and the other end of the flow ring (2105) is connected to a circulating hose (2107) through a one-way valve. The outer side of the heat-conducting ring (201) is fixedly connected to a disturbance heat dissipation plate (2108), and the outer side of the heat insulation box (2062) is connected to a disturbance heat dissipation block (2109).

8. The end cover structure for a permanent magnet motor with cooling function according to claim 7, characterized in that, The inner side of the flow ring (2105) is fixedly connected to a disturbance tooth (9), and the inner side of the disturbance tooth (9) is rotatably connected to a flow impeller (10).

9. The end cover structure for a permanent magnet motor with cooling function according to claim 1, characterized in that, It also includes a flow extrusion assembly (11) for circulating heat dissipation, the flow extrusion assembly (11) includes a cam (111), and the cam (111) is fixedly connected to a friction ring (209). A positioning box (112) is provided on the top of the cam (111), and the interior of the positioning box (112) is snapped into connection with a circulating hose (2107). The top of the positioning box (112) is slidably connected to the end cap structure body (1). The positioning box (112) is hinged to a shape memory alloy strip (205). A movable spring is elastically connected to the top of the positioning box (112), and the movable spring is elastically connected to the end cap structure body (1). The other end of the circulating hose (2107) is connected to a cooling box (113), and the cooling box (113) is connected to a cooling pipe (2106).

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