Spaceflight micro motor convenient for heat dissipation

Abstract

This invention provides a micro-motor for aerospace applications with convenient heat dissipation, relating to the field of micro-motor technology. It includes a motor body with an outer casing. A shaft is located at the center of the front side of the casing, and the motor body's shaft extends from the shaft to the outside of the casing. Both the front and rear sides of the casing have annular grooves, and annular filters are tightly installed in both grooves. A cooling motor is vertically mounted on the rear side of the casing, and an impeller is connected to the shaft of the cooling motor. The cooling motor drives the impeller to rotate, causing the cooling airflow to enter the casing through the annular filters on the rear side. After carrying away heat from the surface of the motor body, the airflow exits through the annular filters on the front side. The two annular filters prevent dust from entering the casing, thus avoiding its adhesion to the motor body surface and affecting heat dissipation, while also reducing the risk of dust entering the motor body.

Description

Technical Field

[0001] This invention relates to the field of micro motor technology, and more specifically, to a micro motor for aerospace applications that facilitates heat dissipation. Background Technology

[0002] Micromotors are small, low-power motors, or motors with special performance characteristics and specific applications, widely used in aerospace and many other cutting-edge fields. However, micromotors generate a significant amount of heat during operation. As operation continues, this heat accumulates, increasing the resistance of the motor windings and affecting the motor's power performance. This can prevent the motor from driving the load properly, and in severe cases, even lead to equipment failure, impacting the stable operation of the entire system. Therefore, when the operating temperature of a micromotor becomes too high, timely heat dissipation is necessary.

[0003] In existing technologies, air cooling is a common heat dissipation method for micromotors. However, in aerospace environments, other equipment inevitably accumulates dust due to long-term operation and aging. Once this dust adheres in large quantities to the casing of the micromotor, the casing's heat dissipation performance will be significantly reduced. Moreover, dust accumulation will significantly increase the risk of dust entering the micromotor's interior, ultimately adversely affecting its performance and threatening the stable operation of aerospace equipment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a micro motor for aerospace applications that is easy to dissipate heat.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a micro motor for aerospace applications that facilitates heat dissipation, comprising a motor body, an outer casing provided for the motor body, and the front and rear faces of the motor body being tightly connected to the front and rear faces of the casing, respectively. A shaft cylinder is provided at the center of the front face of the casing, and the rotating shaft of the motor body extends from the shaft cylinder to the outside of the casing. Annular grooves are provided on both the front and rear faces of the casing, and annular filters are tightly installed in both grooves. A heat dissipation motor is vertically mounted on the rear face of the casing, and an impeller is connected to the rotating shaft of the heat dissipation motor.

[0006] As a preferred embodiment of the present invention, the cylindrical surface of the protective shell is connected to the front end plate and the front cover in sequence at one end of the front side. The shaft extends to the central circular hole on the end face of the front cover. A front sealing plate is slidably provided on the shaft, and a spring is sleeved on the shaft. The two ends of the spring are respectively connected to the front sealing plate and the front cover. Four circular grooves are evenly provided on the front sealing plate. A sliding groove is provided in the circular groove. The sliding groove is composed of a straight line segment and an oblique line segment. Four liquid pipes are rotatably provided on the front side of the protective shell. A boss that forms a sliding fit with the sliding groove is installed in the middle of the liquid pipe. An inner disc is provided on one end of the liquid pipe outside the protective shell. An outer disc is rotatably provided on the inner disc. An inner liquid hole is provided on the side of the inner disc. An outer liquid hole corresponding to the inner liquid hole is provided on the side of the outer disc. A liquid storage box is provided on the front cover. The outer disc is fixedly located inside the liquid storage box.

[0007] As a preferred embodiment of the present invention, the liquid pipe is located between the motor body and the inner side of the protective shell, the liquid pipe extends into the interior of the protective shell, and multiple branch pipes are provided at one end of the liquid pipe inside the protective shell, with multiple nozzles on the branch pipes, and the interior of the liquid pipe is a through cavity.

[0008] As a preferred embodiment of the present invention, the liquid storage box is composed of four corner cavities and four square cavities connected alternately. Four outer discs are respectively fixed on the inner wall of the corner cavities, the inner discs penetrate through the corner cavities, and the inner discs are tightly sealed with the corner cavities. An expansion membrane is connected to the square cavities, and a one-way liquid valve is connected to the side of one of the square cavities, and the one-way liquid valve extends to the outside of the front cover.

[0009] As a preferred embodiment of the present invention, ventilation strips for ventilation are provided on all four side walls of the front cover.

[0010] As a preferred embodiment of the present invention, through holes are provided at the four corners of the end faces of the front end plate and the front cover, and through cylinders are provided between the corresponding through holes of the front end plate and the front cover.

[0011] As a preferred technical solution of the present invention, the cylindrical surface of the protective shell is connected to a rear end plate and a rear cover in sequence at one end of the rear side. The end face of the rear cover is provided with a ventilation port for ventilation, and a sliding column is vertically provided at the center of the rear cover facing the motor body. A rear sealing plate for blocking the ventilation port is slidably provided on the circular groove cylinder. A second spring is sleeved on the outside of the circular groove cylinder, and the two ends of the second spring are respectively connected to the sliding column and the rear sealing plate.

[0012] As a preferred embodiment of the present invention, a middle plate is provided on the inner wall of the rear end plate, and a one-way bearing is provided between the middle plate and the rotating shaft of the cooling motor. The inner ring of the one-way bearing is connected to the rotating shaft of the cooling motor, and the outer ring of the one-way bearing is rotatably mounted on the middle plate. A cleaning plate is also connected to the outer ring of the one-way bearing. A rotating ring is provided at the end of the cleaning plate near the axis of the impeller. A rotating seat is provided on the rear side of the protective shell, and the rotating ring is rotatably mounted on the rotating seat.

[0013] As a preferred embodiment of the present invention, the rear end plate is provided with four vent holes at the four corners, and the end face of the rear cover is provided with dust holes coaxial with the four vent holes at the four corners. The vent holes are provided with flared openings, the inner side of the flared openings is in contact with the sealing plate, the sealing plate is provided with a slide rod along the axial direction, the slide rod is slidably mounted on the support plate, the support plate is fixedly mounted on the inner wall of the rear cover, and the slide rod is fitted with a spring three, the two ends of the spring three are connected to the sealing plate and the support plate.

[0014] As a preferred embodiment of the present invention, the slide rod is provided with a plug at one end near the dust hole, a dust removal cylinder is provided on the dust hole, an inclined hole is provided at one end of the dust removal cylinder near the plug, the plug contacts the inclined hole, and a round filter screen is provided at the opening of the dust removal cylinder away from the plug.

[0015] The advantages of this invention compared to the prior art are:

[0016] (1) The present invention uses a protective shell to wrap the motor body inside. The cooling motor drives the impeller to rotate, so that the cooling airflow enters the protective shell through the ring filter on the rear side of the protective shell. After taking away the heat from the surface of the motor body, it flows out from the ring filter on the front side of the protective shell. The two ring filters prevent dust from entering the interior of the protective shell, thereby preventing it from adhering to the surface of the motor body and affecting the heat dissipation effect, while reducing the risk of dust entering the interior of the motor body.

[0017] (2) When not in use, the present invention uses a front sealing plate to cover the ring filter on the front side of the protective shell, and a rear sealing plate to fit the vent, preventing dust from entering the interior of the rear cover from the vent. Therefore, it can prevent dust from adhering to the two ring filters. Thus, when the impeller rotates, it improves the efficiency of the heat dissipation airflow through the two ring filters.

[0018] (3) When using air cooling, the distance between the branch pipe and the motor body is relatively large, which facilitates the airflow to pass over the surface of the motor body and efficiently remove heat. When air cooling is insufficient to remove the heat generated by the motor body, the power of the cooling motor is increased and the liquid pipe automatically starts to rotate in the front side of the casing, which reduces the gap between the branch pipe and the motor body. The pressurized coolant in the liquid storage box enters the liquid pipe through the outer liquid hole and the inner liquid hole. The coolant is sprayed efficiently from the nozzle on the branch pipe onto the surface of the motor body, improving the heat dissipation efficiency of the motor body.

[0019] (4) After long-term use, the heat dissipation motor is started, and the outer ring of the one-way bearing drives the cleaning brush plate to clean the ring filter screen. The reverse air pressure generated by the impeller driven by the heat dissipation motor blows the dust into the dust collection cylinder. Due to the filtering effect of the round filter screen, the dust will be stored in the dust collection cylinder to avoid further impact on the aerospace environment. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the overall internal structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the overall cross-section of the present invention.

[0023] Figure 4 This is a schematic diagram of the protective shell of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure for mounting the motor body of the present invention.

[0025] Figure 6 This is a schematic diagram of the front sealing plate installation structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the internal structure of the front cover of the present invention.

[0027] Figure 8 This is a schematic diagram of the installation structure of the circular groove cylinder and liquid pipe of the present invention.

[0028] Figure 9 This is a schematic diagram of the exploded cross-section of the inner and outer disks of the present invention.

[0029] Figure 10 for Figure 9 A magnified view of a portion of point A in the middle.

[0030] Figure 11 This is a schematic diagram of the structure of the circular groove cylinder of the present invention.

[0031] Figure 12 This is a schematic diagram of the liquid storage box of the present invention.

[0032] Figure 13 This is a schematic diagram of the structure for installing the rear sealing plate of the present invention.

[0033] Figure 14 This is a schematic diagram of the structure for installing the cleaning brush plate of the present invention.

[0034] Figure 15 This is a schematic diagram of the one-way bearing installation structure of the present invention.

[0035] Figure 16 This is a schematic diagram of the cleaning plate and rotating ring of the present invention.

[0036] Figure 17 This is a schematic diagram of the mounting structure of the sealing plate of the present invention.

[0037] Figure 18 This is a schematic diagram of the cross-sectional structure of the dust collector cylinder of the present invention.

[0038] Reference numerals: 1-Motor body; 2-Shell; 201-Shaft cylinder; 202-Annular groove; 3-Annular filter screen; 4-Cooling motor; 5-Impeller; 6-Front end plate; 7-Front cover; 701-Ventilation strip; 8-Front sealing plate; 9-Spring 1; 10-Circular groove cylinder; 1001-Slide groove; 11-Liquid pipe; 1101-Boss; 1102-Branch pipe; 12-Inner disc; 1201-Inner liquid hole; 13-Outer disc; 1301-Outer liquid hole; 14-Liquid storage box; 1401-Corner cavity; 1402-Square cavity ; 15-Expansion membrane; 16-One-way liquid valve; 17-Passive cylinder; 18-Rear end plate; 1801-Air hole; 19-Rear cover; 1901-Ventilation port; 1902-Dust hole; 20-Sliding column; 21-Rear sealing plate; 22-Spring II; 23-Middle plate; 24-One-way bearing; 25-Cleaning brush plate; 26-Rotating ring; 27-Rotating seat; 28-Flare mouth; 29-Sealing plate; 30-Sliding rod; 31-Support plate; 32-Spring III; 33-Plug; 34-Dust collector cylinder; 3401-Slanted hole; 35-Round filter screen. Detailed Implementation

[0039] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0040] Example: A micro motor for aerospace applications with easy heat dissipation includes a motor body 1, a protective shell 2 on the outside of the motor body 1, and the front end face (with shaft end) and rear end face (without shaft end) of the motor body 1 are tightly connected to the front side and rear side of the protective shell 2, respectively. A shaft cylinder 201 is provided at the center of the front side of the protective shell 2, and the rotating shaft of the motor body 1 extends from the shaft cylinder 201 to the outside of the protective shell 2. Both the front side and the rear side of the protective shell 2 are provided with annular grooves 202, and annular filters 3 are tightly installed in both annular grooves 202. A heat dissipation motor 4 is vertically provided on the rear side of the protective shell 2, and an impeller 5 is connected to the rotating shaft of the heat dissipation motor 4.

[0041] Specifically, the housing 2 encloses the motor body 1 inside, and the cooling motor 4 drives the impeller 5 to rotate, so that the cooling airflow enters the housing 2 through the ring filter 3 on the rear side of the housing 2, and after taking away the heat from the surface of the motor body 1, it flows out from the ring filter 3 on the front side of the housing 2. The two ring filters 3 prevent dust from entering the housing 2 and then adhering to the surface of the motor body 1, affecting the heat dissipation effect, and at the same time reducing the risk of dust entering the motor body 1.

[0042] Considering that air cooling is insufficient to remove the heat generated by the motor body 1 in extreme environments, a front plate 6 and a front cover 7 are sequentially connected to the front end of the cylindrical surface of the casing 2. The shaft cylinder 201 extends to the central circular hole on the end face of the front cover 7. A front sealing plate 8 is slidably mounted on the shaft cylinder 201, and a spring 9 is sleeved on the shaft cylinder 201. The two ends of the spring 9 are connected to the front sealing plate 8 and the front cover 7, respectively. Four circular groove cylinders 10 are evenly provided on the front sealing plate 8. Each circular groove cylinder 10 has a sliding groove 1001, which is composed of straight segments and oblique segments. Four liquid pipes 11 are rotatably mounted on the front side of the protective shell 2. A boss 1101 that forms a sliding fit with the slide groove 1001 is installed in the middle of the liquid pipe 11. An inner disc 12 is provided at one end of the liquid pipe 11 located outside the protective shell 2. An outer disc 13 is rotatably mounted on the inner disc 12. An inner liquid hole 1201 is provided on the side of the inner disc 12. An outer liquid hole 1301 corresponding to the inner liquid hole 1201 is provided on the side of the outer disc 13. A liquid storage box 14 is provided on the front cover 7. The outer disc 13 is fixedly mounted inside the liquid storage box 14. The liquid storage box 14 is filled with coolant.

[0043] Specifically, when the impeller 5 is not rotating, the spring 9 provides elastic force, causing the front sealing plate 8 to contact the front side of the housing 2. The front sealing plate 8 covers the annular filter 3 on the front side of the housing 2, preventing dust from adhering to the annular filter 3, thereby improving the efficiency of the cooling airflow through the annular filter 3 when the impeller 5 is rotating. At the same time, the inner liquid hole 1201 and the outer liquid hole 1301 do not coincide, so the coolant in the liquid storage box 14 will not enter the liquid pipe 11 from the outer liquid hole 1301 and the inner liquid hole 1201. When the impeller 5 starts to rotate, the air pressure generated by the impeller 5 applies pressure to the front sealing plate 8, causing the front sealing plate 8 to move away from the housing 2. Therefore, the cooling airflow can pass smoothly through the annular filter 3 on the front side of the housing 2. At this time, the front sealing plate 8 moves synchronously with the circular groove cylinder 10, and the boss 1101 slides in the straight section of the slide groove 1001. In extreme environments, the power of the cooling motor 4 is increased, and the air pressure generated by the impeller 5 is increased, driving the front sealing plate 8 to continue moving away from the housing 2 along the shaft cylinder 201. The boss 1101 slides in the inclined section of the slide groove 1001, so the liquid pipe 11 starts to rotate in the front side of the housing 2. The housing 2 rotates synchronously with the inner disc 12. The inner liquid hole 1201 coincides with the outer liquid hole 1301. The coolant in the liquid storage box 14 enters the liquid pipe 11 through the outer liquid hole 1301 and the inner liquid hole 1201. The coolant is then sprayed into the interior of the housing 2 through the liquid pipe 11 and onto the surface of the motor body 1, improving the heat dissipation efficiency of the motor body 1.

[0044] In order to efficiently spray the coolant in the liquid pipe 11 onto the surface of the motor body 1, the liquid pipe 11 is located between the inner side of the motor body 1 and the protective shell 2. The liquid pipe 11 extends into the interior of the protective shell 2, and multiple branch pipes 1102 are provided at one end of the liquid pipe 11 inside the protective shell 2. Multiple nozzles are provided on the branch pipes 1102, and the interior of the liquid pipe 11 is a through cavity.

[0045] Specifically, when the liquid pipe 11 is not rotating, the distance between the branch pipe 1102 and the motor body 1 is relatively large, which facilitates the cooling airflow passing over the surface of the motor body 1 and efficiently carrying away heat. When the liquid pipe 11 rotates, the branch pipe 1102 rotates towards the surface of the motor body 1, making the gap between the branch pipe 1102 and the motor body 1 smaller, which facilitates the efficient spraying of coolant from the nozzle on the branch pipe 1102 onto the surface of the motor body 1.

[0046] The liquid storage box 14 is composed of four corner cavities 1401 and four square cavities 1402 connected alternately. Four outer discs 13 are respectively fixed on the inner wall of the corner cavities 1401. The inner liquid pipe 11 penetrates through the corner cavities 1401, and the inner liquid pipe 11 and the corner cavities 1401 are tightly sealed. An expansion membrane 15 is connected to the square cavity 1402. A one-way liquid valve 16 is connected to the side of one of the square cavities 1402, and the one-way liquid valve 16 extends to the outside of the front cover 7. Before using this motor, coolant is filled into the liquid storage box 14 through the one-way liquid valve 16. The coolant causes the expansion membrane 15 to expand, so the coolant in the liquid storage box 14 is pressurized. When the inner liquid hole 1201 coincides with the outer liquid hole 1301, the pressurized coolant in the liquid storage box 14 can be sprayed out from the nozzle of the branch pipe 1102. When maintaining the equipment, coolant should be filled into the reservoir 14 through the one-way valve 16 so that it can be used in extreme environments.

[0047] The front cover 7 has ventilation strips 701 on each of its four side walls for ventilation. The heat dissipation gas flowing out from the ring filter 3 on the front side of the housing 2 flows out to the outside of the motor through the ventilation strips 701.

[0048] The front end plate 6 and the front cover 7 are provided with through holes at the four corners of their end faces, and there are through cylinders 17 between the corresponding through holes of the front end plate 6 and the front cover 7. When installing this motor, the bolts are passed through the through cylinders 17 and then fixed to the mounting plate with bolts and nuts to complete the installation.

[0049] To improve the efficiency of airflow through the ring filter 3, and to prevent dust from adhering to the ring filter 3 on the rear side of the housing 2 when the motor is not in use, a rear end plate 18 and a rear cover 19 are connected sequentially to one end of the cylindrical surface of the housing 2 on the rear side. A ventilation port 1901 for ventilation is provided on the end face of the rear cover 19, and a sliding column 20 is vertically provided on the side of the rear cover 19 facing the motor body 1. A rear sealing plate 21 for blocking the ventilation port 1901 is slidably provided on the cylindrical groove 10. A spring 22 is sleeved on the outside of the cylindrical groove 10, and the two ends of the spring 22 are connected to the sliding column 20 and the rear sealing plate 21 respectively.

[0050] Specifically, when the motor body 1 is not in use, spring 22 provides elasticity, causing the rear cover 21 to fit against the vent 1901, preventing dust from entering the interior of the rear cover 19 from the vent 1901, thus preventing dust from adhering to the ring filter 3 on the rear side of the protective shell 2; when the motor body 1 is in use and the impeller 5 is rotating, the air pressure generated by the impeller 5 generates suction on the rear cover 21, driving the rear cover 21 to move along the slide column 20 away from the vent 1901, and spring 22 is compressed, so the airflow smoothly enters from the vent 1901.

[0051] Considering that when the motor is used for a long time, dust will still enter the interior of the rear cover 19 through the vent 1901 and then adhere to the annular filter 3 on the rear side of the protective shell 2, a middle plate 23 is provided on the inner wall of the rear end plate 18. A one-way bearing 24 is provided between the middle plate 23 and the rotating shaft of the cooling motor 4, and the inner ring of the one-way bearing 24 is connected to the rotating shaft of the cooling motor 4. The outer ring of the one-way bearing 24 is rotatably mounted on the middle plate 23. A cleaning brush plate 25 is also connected to the outer ring of the one-way bearing 24. The cleaning brush plate 25 contacts the annular filter 3 on the rear side of the protective shell 2. A rotating ring 26 is provided at the end of the cleaning brush plate 25 near the axis of the impeller 5. A rotating seat 27 is provided on the rear side of the protective shell 2, and the rotating ring 26 is rotatably mounted on the rotating seat 27.

[0052] Specifically, when the cooling motor 4 rotates in the forward direction, the shaft of the cooling motor 4 drives the inner ring of the one-way bearing 24 to rotate. Due to the friction between the outer ring of the one-way bearing 24 and the middle plate 23, the outer ring of the one-way bearing 24 does not rotate, and the cleaning brush plate 25 does not rotate either. When the cooling motor 4 rotates in the reverse direction, the shaft of the cooling motor 4 drives the inner ring of the one-way bearing 24 to rotate in the reverse direction. Since the one-way bearing 24 is a one-way transmission, the inner ring of the one-way bearing 24 drives the outer ring of the one-way bearing 24 to rotate synchronously. The outer ring of the one-way bearing 24 drives the cleaning brush plate 25 to clean the ring filter 3. The rotational cooperation between the cleaning brush plate 25 and the rotating ring 26 makes the rotation of the one-way bearing 24 more stable.

[0053] Considering that this motor is used in the aerospace field, the dust swept from the rear side of the protective shell 2 and the filter screen 3 cannot be arbitrarily discharged outside the device. The rear end plate 18 has four vents 1801 at its four corners, and the rear cover 19 has dust holes 1902 at its four corners, coaxial with the four vents 1801. The vents 1801 have flared openings 28, and the inner side of the flared openings 28 contacts the sealing plate 29. The sealing plate 29 has a slide rod 30 along its axial direction, which slides on the support plate 31. The support plate 31 is fixed to the inner wall of the rear cover 19. The slide rod 30 is fitted with a spring 32, and the two ends of the spring 32 are connected to the sealing plate 29 and the support plate 31, respectively.

[0054] The slide bar 30 is provided with a plug 33 at one end near the dust hole 1902. A dust removal cylinder 34 is provided on the dust hole 1902. An inclined hole 3401 is provided at one end of the dust removal cylinder 34 near the plug 33. The plug 33 is in contact with the inclined hole 3401. A round filter screen 35 is provided at the opening of the dust removal cylinder 34 away from the plug 33.

[0055] When the impeller 5 rotates in reverse, it generates reverse air pressure. The front sealing plate 8 will fit against the casing 2, so the airflow will not enter the casing 2 from the annular filter 3 on the front side of the casing 2. Therefore, the reverse air pressure generated by the impeller 5 will exert a suction force on the spring 32 towards the circular filter 35 and a pressure on the plug 33 towards the circular filter 35. Therefore, the slide rod 30 moves along the support plate 31 towards the circular filter 35, the spring 32 is compressed, the flared mouth 28 separates from the sealing plate 29, the plug 33 separates from the oblique hole 3401, and the airflow exits from the air hole 1801. The airflow enters the rear cover 19, and because the flare 28 is conical, the airflow will fill the interior of the rear cover 19 along the gap between the flare 28 and the sealing plate 29. Then the airflow enters the dust collector 34 along the gap between the plug 33 and the oblique hole 3401, and then flows to the outside through the round filter 35. Therefore, the dust will enter the interior of the dust collector 34 with the airflow. Due to the filtering effect of the round filter 35, the dust will be stored in the dust collector 34 to avoid further affecting the aerospace environment. When maintaining the equipment, the dust in the dust collector 34 should be cleaned in time.

[0056] Working principle: When performing equipment maintenance, coolant is filled into the liquid storage box 14 through the one-way liquid valve 16. The coolant causes the expansion membrane 15 to expand, so the coolant in the liquid storage box 14 is pressurized for use in extreme environments; and the dust in the dust collector 34 is emptied.

[0057] When the present invention is not in use, and the cooling motor 4 stops operating, spring 9 provides elastic force, causing the front sealing plate 8 to contact the front side of the protective shell 2. The front sealing plate 8 covers the annular filter 3 on the front side of the protective shell 2, preventing dust from adhering to the annular filter 3 on the front side of the protective shell 2. At the same time, spring 22 provides elastic force, causing the rear sealing plate 21 to fit against the vent 1901, preventing dust from entering the interior of the rear cover 19 from the vent 1901, thereby preventing dust from adhering to the annular filter 3 on the rear side of the protective shell 2, and improving the efficiency of the cooling airflow through the two annular filters 3 when the impeller 5 is rotating. Furthermore, in the straight section of the slide groove 1001, the inner liquid hole 1201 and the outer liquid hole 1301 of the boss 1101 do not coincide, so the coolant in the liquid storage box 14 will not enter the liquid pipe 11 from the outer liquid hole 1301 and the inner liquid hole 1201.

[0058] When this invention is in use and heat dissipation is required for the motor body 1, the heat dissipation motor 4 is started, driving the impeller 5 to rotate. The air pressure generated by the impeller 5 applies pressure to the front sealing plate 8, causing the front sealing plate 8 to move away from the protective shell 2. Therefore, the heat dissipation airflow can smoothly pass through the upper ring filter screen 3 on the front side of the protective shell 2. At this time, the front sealing plate 8 moves synchronously with the circular groove cylinder 10, and the boss 1101 slides in the straight section of the slide groove 1001. The liquid pipe 11 does not rotate, and the distance between the branch pipe 1102 and the motor body 1 is large, which facilitates the heat dissipation airflow to pass over the surface of the motor body 1 and efficiently remove heat. At the same time, the air pressure generated by the impeller 5 generates suction on the rear sealing plate 21, driving the rear sealing plate 21 to move away from the vent 1901 along the slide column 20. The spring 22 is compressed, so the heat dissipation airflow flows smoothly from the vent 1901. The cooling airflow enters the housing 2 through the ring filter 3 on the rear side of the housing 2, and carries away the heat from the surface of the motor body 1. Then it flows out from the ring filter 3 on the front side of the housing 2. The two ring filters 3 prevent dust from entering the housing 2 and thus prevent it from adhering to the surface of the motor body 1, which would affect the heat dissipation effect. At the same time, they reduce the risk of dust entering the motor body 1. Finally, the cooling airflow flows out to the outside through the ventilation strip 701.

[0059] When air cooling is insufficient to remove the heat generated by the motor body 1 in extreme environments, the power of the cooling motor 4 is increased, the air pressure generated by the impeller 5 is increased, and the front sealing plate 8 continues to move away from the housing 2 along the shaft cylinder 201. The boss 1101 slides in the inclined section of the slide groove 1001, so the liquid pipe 11 starts to rotate in the front side of the housing 2, making the gap between the branch pipe 1102 and the motor body 1 smaller. The housing 2 rotates synchronously with the inner disc 12, and the inner liquid hole 1201 coincides with the outer liquid hole 1301. The pressurized coolant in the liquid storage box 14 enters the liquid pipe 11 through the outer liquid hole 1301 and the inner liquid hole 1201. The coolant is efficiently sprayed onto the surface of the motor body 1 from the nozzle on the branch pipe 1102, improving the heat dissipation efficiency of the motor body 1.

[0060] When the present invention is used for a long time, dust will still enter the interior of the back cover 19 through the vent 1901 and then adhere to the upper ring filter 3 on the rear side of the protective shell 2, affecting the heat dissipation efficiency. Therefore, the heat dissipation motor 4 is started in reverse. The rotating shaft of the heat dissipation motor 4 drives the inner ring of the one-way bearing 24 to rotate in the opposite direction. Since the one-way bearing 24 is a one-way transmission, the inner ring of the one-way bearing 24 drives the outer ring of the one-way bearing 24 to rotate synchronously. The outer ring of the one-way bearing 24 drives the cleaning brush plate 25 to clean the ring filter 3. The rotation of the cleaning brush plate 25 and the rotating ring 26 cooperates to make the rotation of the one-way bearing 24 more stable. The cooling motor 4 drives the impeller 5 to generate reverse air pressure. The front sealing plate 8 will fit against the protective shell 2, so the airflow will not enter the protective shell 2 from the annular filter 3 on the front side of the protective shell 2. Therefore, the reverse air pressure generated by the impeller 5 generates a suction force on the spring 32 towards the circular filter 35, and a pressure force on the plug 33 towards the circular filter 35. Therefore, the slide rod 30 moves along the support plate 31 towards the circular filter 35, the spring 32 is compressed, the flared mouth 28 separates from the sealing plate 29, and the plug 33 and the oblique hole 3401 separate. As the airflow enters the rear cover 19 through the air vent 1801, and because the flare 28 is conical, the airflow will fill the interior of the rear cover 19 along the gap between the flare 28 and the sealing plate 29. Then, the airflow will enter the dust collector 34 along the gap between the plug 33 and the oblique hole 3401, and then flow to the outside through the round filter 35. Therefore, dust will enter the interior of the dust collector 34 with the airflow. Due to the filtering effect of the round filter 35, the dust will be stored in the dust collector 34 to avoid further affecting the aerospace environment.

[0061] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A micro-motor for aerospace applications with convenient heat dissipation, comprising a motor body (1), characterized in that: The motor body (1) is provided with a protective shell (2), and the front end face and rear end face of the motor body (1) are tightly connected to the front side and rear side of the protective shell (2), respectively. A shaft cylinder (201) is provided at the center of the front side of the protective shell (2). The rotating shaft of the motor body (1) extends from the shaft cylinder (201) to the outside of the protective shell (2). Both the front and rear sides of the protective shell (2) are provided with annular grooves (202). A ring filter screen (3) is tightly installed in both annular grooves (202). A cooling motor (4) is vertically provided on the rear side of the protective shell (2). An impeller (5) is connected to the rotating shaft of the cooling motor (4). The cylindrical surface of the protective shell (2) is connected to the front end plate (6) and the front cover (7) in sequence at one end of the front side. The shaft cylinder (201) extends to the central circular hole on the end face of the front cover (7). A front sealing plate (8) is slidably provided on the shaft cylinder (201), and a spring (9) is sleeved on the shaft cylinder (201). The two ends of the spring (9) are respectively connected to the front sealing plate (8) and the front cover (7). Four circular groove cylinders (10) are evenly provided on the front sealing plate (8). A sliding groove (1001) is provided in the circular groove cylinder (10). The sliding groove (1001) is composed of a straight line segment and an oblique line segment. The front side of the protective shell (2) The upper part is provided with four liquid pipes (11). The middle part of the liquid pipe (11) is provided with a boss (1101) that forms a sliding fit with the slide groove (1001). The liquid pipe (11) is provided with an inner disc (12) at one end outside the protective shell (2). The inner disc (12) is provided with an outer disc (13). The inner disc (12) is provided with an inner liquid hole (1201) on its side. The outer disc (13) is provided with an outer liquid hole (1301) on its side, corresponding to the inner liquid hole (1201). The front cover (7) is provided with a liquid storage box (14). The outer disc (13) is fixed inside the liquid storage box (14). The liquid pipe (11) is located between the inner side of the motor body (1) and the protective shell (2). The liquid pipe (11) extends into the interior of the protective shell (2), and multiple branch pipes (1102) are provided at one end of the liquid pipe (11) inside the protective shell (2). Multiple nozzles are provided on the branch pipes (1102), and the interior of the liquid pipe (11) is a through cavity. The liquid storage box (14) is composed of four corner cavities (1401) and four square cavities (1402) connected alternately. Four outer discs (13) are fixed on the inner wall of the corner cavity (1401). The inner disc (12) penetrates the corner cavity (1401) and is tightly sealed with the corner cavity (1401). An expansion membrane (15) is connected to the square cavity (1402). A one-way liquid valve (16) is connected to the side of one of the square cavities (1402) and extends to the outside of the front cover (7).

2. The aerospace-grade micro-motor with easy heat dissipation according to claim 1, characterized in that: The front cover (7) is provided with ventilation strips (701) on all four side walls for ventilation.

3. A micro-motor for aerospace applications with convenient heat dissipation according to claim 1, characterized in that: The front end plate (6) and the front cover (7) are provided with through holes at the four corners of their end faces, and a through cylinder (17) is provided between the corresponding through holes of the front end plate (6) and the front cover (7).

4. A micro-motor for aerospace applications with convenient heat dissipation according to claim 1, characterized in that: The cylindrical surface of the protective shell (2) is connected to a rear end plate (18) and a rear cover (19) in sequence at one end of the rear side. A ventilation port (1901) for ventilation is provided on the end face of the rear cover (19), and a sliding column (20) is provided vertically on the side of the rear cover (19) facing the motor body (1). A rear sealing plate (21) for sealing the ventilation port (1901) is slidably provided on the cylindrical groove (10). A spring two (22) is sleeved on the outside of the cylindrical groove (10), and the two ends of the spring two (22) are connected to the sliding column (20) and the rear sealing plate (21) respectively.

5. A micro-motor for aerospace applications with convenient heat dissipation according to claim 4, characterized in that: The inner wall of the rear end plate (18) is provided with a middle plate (23). A one-way bearing (24) is provided between the middle plate (23) and the rotating shaft of the heat dissipation motor (4). The inner ring of the one-way bearing (24) is connected to the rotating shaft of the heat dissipation motor (4). The outer ring of the one-way bearing (24) is rotatably mounted on the middle plate (23). A cleaning plate (25) is also connected to the outer ring of the one-way bearing (24). A rotating ring (26) is provided at the end of the cleaning plate (25) near the axis of the impeller (5). A rotating seat (27) is provided on the rear side of the protective shell (2). The rotating ring (26) is rotatably mounted on the rotating seat (27).

6. A micro-motor for aerospace applications with easy heat dissipation according to claim 5, characterized in that: The rear end plate (18) is provided with four wind holes (1801) at the four corners. The end face of the rear cover (19) is provided with dust holes (1902) at the four corners, which are coaxial with the four wind holes (1801). The wind hole (1801) is provided with a flared mouth (28). The inner side of the flared mouth (28) is in contact with the sealing plate (29). The sealing plate (29) is provided with a slide rod (30) along the axial direction. The slide rod (30) is slidably mounted on the support plate (31). The support plate (31) is fixedly mounted on the inner wall of the rear cover (19). The slide rod (30) is covered with a spring three (32). The two ends of the spring three (32) are connected to the sealing plate (29) and the support plate (31) respectively.

7. A micro-motor for aerospace applications with easy heat dissipation according to claim 6, characterized in that: The slide rod (30) is provided with a plug (33) at one end near the dust hole (1902), and a dust removal cylinder (34) is provided on the dust hole (1902). The dust removal cylinder (34) is provided with an inclined hole (3401) at one end near the plug (33). The plug (33) contacts the inclined hole (3401). A round filter screen (35) is provided at the opening of the dust removal cylinder (34) away from the plug (33).

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