Aerospace small and special motor convenient for heat dissipation

Abstract

The invention provides a spaceflight small and special motor convenient for heat dissipation, and relates to the technical field of small and special motors, the spaceflight small and special motor comprises a motor main body, a protective shell is arranged outside the motor main body, a shaft barrel is arranged at the center of the front side surface of the protective shell, a rotating shaft of the motor main body extends out of the protective shell from the shaft barrel, and the front side surface and the rear side surface of the protective shell are both provided with annular grooves; ring filter screens are tightly mounted at the two ring grooves, a heat dissipation motor is vertically arranged on the rear side face of the protective shell, and an impeller is connected to a rotating shaft of the heat dissipation motor. The heat dissipation motor drives the impeller to rotate, so that heat dissipation airflow enters the protective shell through the annular filter screen on the rear side surface of the protective shell and flows out from the annular filter screen on the front side surface of the protective shell after taking away heat on the surface of the motor main body, and the two annular filter screens prevent dust from entering the protective shell and further prevent the dust from being attached to the surface of the motor main body to affect the heat dissipation effect; and meanwhile, the risk that dust enters the motor main body is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of micro motors, and more particularly to a micro motor for aerospace use that is easy to dissipate heat. Background Art

[0002] Micromotors are compact, low-power motors with specialized performance and specific applications. They are widely used in aerospace and other cutting-edge fields. However, they generate significant heat during operation. As operation continues, this heat accumulates, increasing the resistance of the motor windings. This in turn affects the motor's power performance, making it unable to properly drive the load. In severe cases, it can even cause equipment failure and affect the stable operation of the entire system. Therefore, when a micromotors' operating temperature is too high, it requires timely heat dissipation.

[0003] Air cooling is a common heat dissipation method for micro motors. However, in aerospace environments, the long-term operation and aging of other equipment inevitably generate dust. Once this dust accumulates in large quantities on the micro motor casing, the casing's heat dissipation performance is significantly compromised. Furthermore, dust accumulation significantly increases the risk of dust entering the micro motor'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 prior art, the purpose of the present invention is to provide a micro motor for aerospace use that is easy to dissipate heat.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a micro motor for aerospace use that is easy to dissipate heat, including a motor body, a protective shell is provided on the outside of the motor body, and the front end face and rear end face of the motor body are tightly connected to the front side and rear side of the protective shell respectively, a shaft cylinder is provided at the center of the front side of the protective shell, and the rotating shaft of the motor body extends from the shaft cylinder to the outside of the protective shell, the front side and rear side of the protective shell are both provided with annular grooves, and annular filters are tightly installed at the two annular grooves, a heat dissipation motor is vertically provided on the rear side of the protective shell, and an impeller is connected to the rotating shaft of the heat dissipation motor.

[0006] As a preferred technical solution of the present invention, one end of the cylindrical surface of the protective shell is connected to the front end plate and the front cover in sequence, and the shaft cylinder extends to the central circular hole on the end surface of the front cover, and a front sealing plate is slidably provided on the shaft cylinder, and a spring 1 is provided on the outer sleeve of the shaft cylinder, and the two ends of the spring 1 are respectively connected to the front sealing plate and the front cover, and four circular groove cylinders are evenly provided on the front sealing plate, and a slide groove is provided in the circular groove cylinder, and the slide groove consists of a straight segment and an oblique segment. Four liquid pipes are rotatably provided on the front side surface of the protective shell, and a boss that forms a sliding fit with the slide groove is installed in the middle of the liquid pipe. An inner disc is provided on the liquid pipe at one end outside the protective shell, and an outer disc is rotatably provided on the inner disc. The side surface of the inner disc is provided with an inner liquid hole, and the side surface of the outer disc is provided with an outer liquid hole corresponding to the inner liquid hole. A liquid storage box is provided on the front cover, and the outer disc is fixedly arranged inside the liquid storage box.

[0007] As a preferred technical solution 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 to the inside of the protective shell, and a plurality of branch pipes are provided at one end of the liquid pipe located inside the protective shell, and a plurality of nozzles are provided on the branch pipes, and the inside of the liquid pipe is a through cavity.

[0008] As a preferred technical solution of the present invention, the liquid storage box is composed of four corner cavities and four square cavities alternately connected, the four outer discs are respectively fixed on the inner cavity walls of the corner cavities, the inner discs penetrate the corner cavities, and the inner discs and the corner cavities are tightly sealed, an expansion membrane is provided on the square cavity, a one-way liquid valve is provided on the side of a square cavity, and the one-way liquid valve extends to the outside of the front cover.

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

[0010] As a preferred technical solution of the present invention, through holes are respectively provided at the four corners of the end faces of the front end plate and the front cover, and through tubes 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 the rear end plate and the rear cover in sequence at one end of the rear side surface, a vent for ventilation is provided on the end surface of the rear cover, and a sliding column is vertically provided at the center of the rear cover facing the side of the motor body, a rear sealing plate for sealing the vent is slidably provided on the circular groove cylinder, and a spring 2 is provided on the outer sleeve of the circular groove cylinder, and the two ends of the spring 2 are respectively connected to the sliding column and the rear sealing plate.

[0012] As a preferred technical solution of the present invention, a middle plate is provided on the inner wall of the rear end plate, a one-way bearing is provided between the middle plate and the rotating shaft of the heat dissipation motor, and the inner ring of the one-way bearing is connected to the rotating shaft of the heat dissipation motor, the outer ring of the one-way bearing is rotatably provided on the middle plate, and a cleaning plate is also connected to the outer ring of the one-way bearing. A swivel is provided at the end of the cleaning plate close to the axis of the impeller, and a swivel seat is provided on the rear side surface of the protective shell, and the swivel ring is rotatably provided on the swivel seat.

[0013] As a preferred technical solution of the present invention, the rear end panel is provided with air holes at four corners, and dust holes coaxial with the four air holes are provided at the four corners on the end face of the rear cover. The air holes are provided with bell mouths, and the inner side surface of the bell mouth is in contact with the sealing plate. A sliding rod is provided on the sealing plate along the axial direction, and the sliding rod is slidably arranged on the support plate, and the support plate is fixed on the inner wall surface of the rear cover. The sliding rod outer sleeve is provided with spring three, and the two ends of spring three are connected to the sealing plate and the support plate.

[0014] As an optimal technical solution of the present invention, the sliding rod is provided with a plug at one end close to the dust hole, a dust collection tube is provided on the dust hole, an inclined hole is provided at one end of the dust collection tube close to the plug, the plug is in contact with the inclined hole, and a circular filter is provided at the opening of the dust collection tube away from the plug.

[0015] The beneficial effects of the present invention compared with the prior art are:

[0016] (1) The present invention uses a protective shell to wrap the motor body inside, and the heat dissipation motor drives the impeller to rotate, so that the heat dissipation airflow enters the protective shell through the annular filter on the rear side of the protective shell, takes away the heat from the surface of the motor body, and then flows out from the annular filter on the front side of the protective shell. The two annular filters prevent dust from entering the interior of the protective shell, and then prevent 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 the present invention is not in use, the front sealing plate is used to cover the annular filter on the front side of the protective shell, and the rear sealing plate is fitted with the vent to prevent dust from entering the interior of the rear cover through the vent, thereby preventing dust from adhering to the two annular filters. Therefore, when the impeller rotates, the efficiency of the heat dissipation airflow passing through the two annular filters is improved.

[0018] (3) When the present invention uses air cooling for heat dissipation, the distance between the branch pipe and the motor body is large, which facilitates the heat dissipation airflow to pass through the surface of the motor body and efficiently remove the heat; when the air cooling is not enough to remove the heat generated by the motor body, the power of the heat dissipation motor is increased, and the liquid pipe automatically starts to rotate in the front side of the protective shell, so that the gap between the branch pipe and the motor body becomes smaller, and the pressurized coolant in the liquid storage box enters the liquid pipe through the outer liquid hole and the inner liquid hole, and the coolant is efficiently sprinkled onto the surface of the motor body from the nozzle on the branch pipe, thereby improving the heat dissipation efficiency of the motor body.

[0019] (4) After the present invention has been used for a long time, the heat dissipation motor is started, and the outer ring of the one-way bearing drives the cleaning brush plate to clean the annular filter screen. The reverse air pressure generated by the heat dissipation motor driving the impeller will blow the dust into the dust collection tube. Due to the filtering effect of the circular filter screen, the dust will be stored in the dust collection tube to avoid further affecting the aerospace environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic structural diagram of the present invention as a whole.

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

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

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

[0024] Figure 5 This is a schematic structural diagram of the motor main body installation of the present invention.

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

[0026] Figure 7 It is a schematic structural diagram of the interior of the front cover of the present invention.

[0027] Figure 8 This is a structural diagram of the installation of the circular grooved drum and the liquid pipe of the present invention.

[0028] Figure 9 It is a structural schematic diagram of the explosion cross section of the inner disc and outer disc of the present invention.

[0029] Figure 10 for Figure 9 A partial enlarged view of point A in the middle.

[0030] Figure 11 It is a structural schematic diagram of the circular grooved drum of the present invention.

[0031] Figure 12 Schematic diagram of the structure of the liquid storage box of the present invention.

[0032] Figure 13 This is a structural diagram of the rear sealing plate installation of the present invention.

[0033] Figure 14 This is a structural diagram of the installation of the cleaning plate of the present invention.

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

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

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

[0037] Figure 18 This is a schematic structural diagram of the cross section of the dust removal tube of the present invention.

[0038] Figure numbers: 1-motor body; 2-shield; 201-shaft cylinder; 202-ring groove; 3-ring filter; 4-heat dissipation motor; 5-impeller; 6-front end plate; 7-front cover; 701-ventilation strip; 8-front sealing plate; 9-spring 1; 10-grooved cylinder; 1001-chute; 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-angular cavity; 1402-square cavity ;15-expansion membrane;16-one-way liquid valve;17-through cylinder;18-rear end plate;1801-air hole;19-rear cover;1901-vent;1902-dust hole;20-sliding column;21-rear sealing plate;22-spring 2;23-middle plate;24-one-way bearing;25-brush plate;26-swivel;27-swivel seat;28-bell mouth;29-sealing plate;30-sliding rod;31-support plate;32-spring 3;33-plug;34-dust collection cylinder;3401-inclined hole;35-circular filter. DETAILED DESCRIPTION

[0039] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0040] Embodiment: A micro motor for aerospace use that is easy to dissipate heat includes a motor body 1, a protective shell 2 is provided on the outside of the motor body 1, and the front end face (with an axial end) and the rear end face (without an axial 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. The front side and rear side of the protective shell 2 are both provided with annular grooves 202, and annular filters 3 are tightly installed at the two 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 protective shell 2 wraps the motor body 1 inside, and the heat dissipation motor 4 drives the impeller 5 to rotate, so that the heat dissipation airflow enters the protective shell 2 through the annular filter 3 on the rear side of the protective shell 2, takes away the heat from the surface of the motor body 1, and then flows out from the annular filter 3 on the front side of the protective shell 2. The two annular filters 3 prevent dust from entering the inside of the protective shell 2 and then adhering to the surface of the motor body 1, affecting the heat dissipation effect, while reducing the risk of dust entering the inside of the motor body 1.

[0042] Considering that in extreme environments, air cooling is not enough to take away the heat generated by the motor body 1, the front end plate 6 and the front cover 7 are connected in sequence at one end of the cylindrical surface of the protective shell 2 on the front side, and the shaft cylinder 201 extends to the central circular hole on the end surface of the front cover 7. A front sealing plate 8 is slidably provided on the shaft cylinder 201, and a spring 9 is provided on the outer sleeve of 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 slide groove 1001 is provided in the circular groove cylinder 10. The slide groove 1001 is composed of a straight segment and an oblique segment. Four liquid tubes 11 are rotatably provided on the front side of the protective shell 2. A boss 1101 is installed in the middle of the liquid tube 11 to form a sliding fit with the slide groove 1001. An inner disc 12 is provided at one end of the liquid tube 11 located outside the protective shell 2. An outer disc 13 is rotatably provided on the inner disc 12. An inner liquid hole 1201 is provided on the side of the inner disc 12, and 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 arranged inside the liquid storage box 14, and the liquid storage box 14 is filled with coolant.

[0043] Specifically, when the impeller 5 is not rotating, the spring 1-9 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, thereby improving the efficiency of the cooling airflow passing through the annular filter 3 when the impeller 5 rotates. At the same time, the inner liquid hole 1201 and the outer liquid hole 1301 do not overlap, and the coolant in the liquid storage box 14 does not enter the liquid pipe 11 through the outer liquid hole 1301 and the inner liquid hole 1201. When the impeller 5 begins to rotate, the air pressure generated by the impeller 5 exerts pressure on the front sealing plate 8, causing it to move away from the protective shell 2. Therefore, the cooling airflow can smoothly pass through the annular filter 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. When in extreme environments, the power of the heat dissipation motor 4 is increased, the air pressure generated by the impeller 5 is increased, and the front sealing plate 8 is driven to continue to move along the shaft cylinder 201 in the direction away from the protective shell 2. The boss 1101 slides in the oblique segment of the slide groove 1001, so the liquid pipe 11 starts to rotate in the front side of the protective shell 2, and the protective shell 2 rotates synchronously with the inner disk 12. The inner liquid hole 1201 coincides with the outer liquid hole 1301, and 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 protective shell 2 through the liquid pipe 11 and sprinkled on the surface of the motor body 1, thereby improving the heat dissipation efficiency of the motor body 1.

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

[0045] Specifically, when liquid pipe 11 is not rotating, the distance between branch pipe 1102 and motor body 1 is relatively large, allowing the cooling airflow to pass through the surface of motor body 1 and efficiently remove heat. When liquid pipe 11 rotates, branch pipe 1102 rotates toward the surface of motor body 1, reducing the gap between branch pipe 1102 and motor body 1 and facilitating efficient spraying of coolant from the nozzle on branch pipe 1102 onto the surface of motor body 1.

[0046] The liquid reservoir 14 is composed of four corner cavities 1401 and four square cavities 1402, alternating between them. Four outer discs 13 are fixed to the inner walls of the corner cavities 1401. An inner liquid tube 11 penetrates each corner cavity 1401 and is tightly sealed with the inner liquid tube 11. An expansion membrane 15 is provided in communication with each square cavity 1402. A one-way liquid valve 16 is provided on the side of one of the square cavities 1402, extending to the exterior of the front cover 7. Before using the motor, coolant is filled into the liquid reservoir 14 through the one-way liquid valve 16. The coolant inflates the expansion membrane 15, causing the coolant in the liquid reservoir 14 to be pressurized. When the inner liquid hole 1201 and the outer liquid hole 1301 coincide, the pressurized coolant in the liquid reservoir 14 can be discharged from the nozzle of the branch pipe 1102. When maintaining the equipment, the liquid storage box 14 needs to be filled with coolant through the one-way liquid valve 16 so that it can be used in extreme environments.

[0047] The four side walls of the front cover 7 are provided with ventilation strips 701 for ventilation. The heat dissipation gas flowing out of the annular filter 3 on the front side of the protective shell 2 flows to the outside of the motor through the ventilation strips 701.

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

[0049] In order to improve the efficiency of the heat dissipation airflow through the annular filter 3, when the motor is not in use, it is also necessary to prevent dust from adhering to the annular filter 3 on the rear side of the protective shell 2. The rear end plate 18 and the rear cover 19 are connected in sequence to the end of the cylindrical surface of the protective shell 2 on the rear side. A vent 1901 for ventilation is provided on the end face of the rear cover 19, and a sliding column 20 is vertically provided at the center of the rear cover 19 facing the side of the motor body 1. A rear sealing plate 21 for sealing the vent 1901 is slidably provided on the circular groove cylinder 10, and a spring 22 is provided on the outer sleeve of the circular groove cylinder 10. The two ends of the spring 22 are respectively connected to the sliding column 20 and the rear sealing plate 21.

[0050] Specifically, when the motor body 1 is not in use, the spring 22 provides elastic force to make the rear sealing plate 21 fit with 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; 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 sealing plate 21, driving the rear sealing plate 21 to move along the sliding column 20 away from the vent 1901, and the spring 22 is compressed, so the air flow enters smoothly from the vent 1901.

[0051] Taking into account that when this motor is used for too long, dust will still enter the inside of the rear cover 19 from 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, and a one-way bearing 24 is provided between the middle plate 23 and the rotating shaft of the heat dissipation motor 4, and the inner ring of the one-way bearing 24 is connected to the rotating shaft of the heat dissipation motor 4, and the outer ring of the one-way bearing 24 is rotatably provided on the middle plate 23, and a cleaning plate 25 is also connected to the outer ring of the one-way bearing 24, and the cleaning plate 25 contacts the annular filter 3 on the rear side of the protective shell 2, and a swivel 26 is provided at the end of the cleaning plate 25 close to the axis of the impeller 5, and a swivel seat 27 is provided on the rear side of the protective shell 2, and the swivel 26 is rotatably provided on the swivel seat 27.

[0052] Specifically, when the heat dissipation motor 4 rotates in the forward direction, the rotating shaft of the heat dissipation 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 brush plate 25 does not rotate either; when the heat dissipation motor 4 rotates in the reverse direction, the rotating shaft of the heat dissipation 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, and the outer ring of the one-way bearing 24 drives the brush plate 25 to clean the annular filter 3. The rotation coordination of the 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 cleaned from the ring filter 3 on the rear side of the protective shell 2 cannot be discharged outside the device at will. The rear end plate 18 is provided with air holes 1801 at four corners, and the four corners of the end surface of the rear cover 19 are provided with dust holes 1902 coaxial with the four air holes 1801. The air holes 1801 are provided with bell mouths 28. The inner side of the bell mouth 28 contacts 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 a support plate 31. The support plate 31 is fixed to the inner wall surface of the rear cover 19. The slide rod 30 is outer-mounted with a spring 32. The two ends of the spring 32 are respectively connected to the sealing plate 29 and the support plate 31.

[0054] The sliding rod 30 is provided with a plug 33 at one end close to 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 close to the plug 33. The plug 33 contacts the inclined hole 3401, and a round filter 35 is provided at the opening of the dust removal cylinder 34 away from the plug 33.

[0055] When the impeller 5 rotates in the opposite direction, the impeller 5 will generate reverse air pressure, and the front sealing plate 8 will fit with the protective shell 2, so the air flow 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 will generate suction force on the spring 32 toward the circular filter 35, and generate pressure on the plug 33 toward the circular filter 35. Therefore, the slide bar 30 moves along the support plate 31 toward the circular filter 35, the spring 32 is compressed, the bell mouth 28 is separated from the sealing plate 29, the plug 33 is separated from the inclined hole 3401, and the air flow is discharged from the air hole 1801. It enters the back cover 19, and because the bell mouth 28 is conical in shape, the airflow will cover the inside of the back cover 19 along the gap between the bell mouth 28 and the sealing plate 29, and then the airflow will enter the dust collector 34 along the gap between the plug 33 and the inclined hole 3401, and then flow to the outside through the circular filter 35. Therefore, the dust will enter the dust collector 34 with the airflow. Due to the filtering effect of the circular 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 must be cleaned in time.

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

[0057] When the present invention is not in use and the heat dissipation motor 4 stops operating, spring 1 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. Simultaneously, spring 2 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 through the vent 1901. This in turn prevents dust from adhering to the annular filter 3 on the rear side of the protective shell 2, thereby improving the efficiency of the heat dissipation airflow passing through the two annular filters 3 when the impeller 5 rotates. Furthermore, since the boss 1101 is within the straight section of the chute 1001, the inner liquid hole 1201 and the outer liquid hole 1301 do not overlap, and the coolant in the liquid reservoir 14 does not enter the liquid pipe 11 through the outer liquid hole 1301 or the inner liquid hole 1201.

[0058] When the present invention is in use and the motor body 1 needs to be cooled, the cooling motor 4 is started to drive 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, so that the heat dissipation airflow can smoothly pass through the ring filter 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 is convenient for the heat dissipation airflow to pass through the surface of the motor body 1 and efficiently take away the 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 along the sliding column 20 in the direction away from the vent 1901, and the spring 22 is compressed, so the heat dissipation airflow flows smoothly into the vent 1901. The heat dissipation airflow enters the protective shell 2 through the annular filter 3 on the rear side of the protective shell 2, takes away the heat from the surface of the motor body 1, and then flows out from the annular filter 3 on the front side of the protective shell 2. The two annular filters 3 prevent dust from entering the interior of the protective shell 2, and then prevent it from adhering to the surface of the motor body 1 and affecting the heat dissipation effect. At the same time, it reduces the risk of dust entering the interior of the motor body 1. The heat dissipation airflow finally flows out to the outside through the ventilation strip 701.

[0059] When in extreme environments, air cooling is not enough to take away the heat generated by the motor body 1, the power of the heat dissipation motor 4 is increased, and the air pressure generated by the impeller 5 is increased to drive the front sealing plate 8 to continue to move along the shaft tube 201 in the direction away from the protective shell 2. The boss 1101 slides in the oblique segment of the slide groove 1001, so the liquid pipe 11 starts to rotate in the front side of the protective shell 2, so that the gap between the branch pipe 1102 and the motor body 1 becomes smaller, and the protective shell 2 rotates synchronously with the inner disk 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, and the coolant is efficiently sprinkled from the nozzle on the branch pipe 1102 to the surface of the motor body 1, thereby improving the heat dissipation efficiency of the motor body 1.

[0060] When the present invention is used for too long, dust will still enter the inside of the back cover 19 from the vent 1901, and then adhere to the annular 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, and 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, and the outer ring of the one-way bearing 24 drives the cleaning plate 25 to clean the annular filter 3. The rotation of the cleaning plate 25 and the rotating ring 26 cooperates to make the rotation of the one-way bearing 24 more stable. The heat dissipation motor 4 drives the impeller 5 to generate reverse air pressure, and the front sealing plate 8 will fit with the protective shell 2, so the air flow 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 toward the circular filter 35, and generates a pressure on the plug 33 toward the circular filter 35. Therefore, the slide bar 30 moves along the support plate 31 toward the circular filter 35, the spring 32 is compressed, the bell mouth 28 is separated from the sealing plate 29, and the plug 33 and the inclined hole 3401 are separated. The airflow enters the back cover 19 from the air hole 1801, and because the bell mouth 28 is conical in shape, the airflow will cover the inside of the back cover 19 along the gap between the bell mouth 28 and the sealing plate 29, and then the airflow will enter the dust collector 34 along the gap between the plug 33 and the inclined hole 3401, and then flow to the outside through the circular filter 35. Therefore, the dust will enter the dust collector 34 with the airflow. Due to the filtering effect of the circular filter 35, the dust will be stored in the dust collector 34 to avoid further affecting the aerospace environment.

[0061] The above are only 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 based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all included in the scope of protection of the present invention.

Claims

1. A micro motor for aerospace use that is easy to dissipate heat, comprising a motor body (1), characterized in that: A protective shell (2) is provided on the outside of the motor body (1), and the front end face and the rear end face of the motor body (1) are tightly connected to the front side face and the rear side face of the protective shell (2), respectively. A shaft cylinder (201) is provided at the center of the front side face 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). The front side face and the rear side face of the protective shell (2) are both provided with annular grooves (202), and annular filter screens (3) are tightly installed at the two annular grooves (202). A heat dissipation motor (4) is vertically provided on the rear side face of the protective shell (2), and an impeller (5) is connected to the rotating shaft of the heat dissipation motor (4).

2. The micro motor for aerospace use with easy heat dissipation according to claim 1, characterized in that: The cylindrical surface of the protective shell (2) is located at one end of the front side surface and is connected to the front end plate (6) and the front cover (7) in sequence. The shaft cylinder (201) extends to the central circular hole on the end surface of the front cover (7). A front sealing plate (8) is slidably provided on the shaft cylinder (201), and a spring (9) is provided on the outer sleeve of 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 slide groove (1001) is provided in the circular groove cylinder (10). The slide groove (1001) is composed of a straight line segment and an oblique line segment. The front side surface of the protective shell (2) Four liquid pipes (11) are rotatably provided on the upper portion, a boss (1101) is installed in the middle of the liquid pipe (11) to form a sliding fit with the slide groove (1001), an inner disc (12) is provided on one end of the liquid pipe (11) located outside the protective shell (2), an outer disc (13) is rotatably provided on the inner disc (12), an inner liquid hole (1201) is provided on the side surface of the inner disc (12), and an outer liquid hole (1301) corresponding to the inner liquid hole (1201) is provided on the side surface of the outer disc (13), a liquid storage box (14) is provided on the front cover (7), and the outer disc (13) is fixedly provided inside the liquid storage box (14).

3. The micro motor for aerospace use with easy heat dissipation according to claim 2, characterized in that: The liquid pipe (11) is located between the motor body (1) and the inner side of the protective shell (2), and the liquid pipe (11) extends into the interior of the protective shell (2). A plurality of branch pipes (1102) are provided at one end of the liquid pipe (111) located inside the protective shell (2), and a plurality of nozzles are provided on the branch pipes (1102). The interior of the liquid pipe (11) is a through cavity.

4. The micro motor for aerospace use with easy heat dissipation according to claim 2, characterized in that: The liquid storage box (14) is composed of four corner cavities (1401) and four square cavities (1402) connected alternately. The four outer discs (13) are respectively fixed on the inner cavity wall of the corner cavity (1401). The inner disc (12) penetrates the corner cavity (1401), and the inner disc (12) and the corner cavity (1401) are tightly sealed. The square cavity (1402) is connected to an expansion membrane (15). The side of one square cavity (1402) is connected to a one-way liquid valve (16), and the one-way liquid valve (16) extends to the outside of the front cover (7).

5. The micro motor for aerospace use with easy heat dissipation according to claim 2, characterized in that: Ventilation strips (701) for ventilation are provided on the four side walls of the front cover (7).

6. The micro motor for aerospace use with easy heat dissipation according to claim 2, characterized in that: Through holes are respectively provided at the four corners of the end faces of the front end plate (6) and the front cover (7), and through tubes (17) are provided between the corresponding through holes of the front end plate (6) and the front cover (7).

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

8. The micro motor for aerospace use with easy heat dissipation according to claim 7, characterized in that: 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 heat dissipation motor (4), and 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 provided on the middle plate (23), the outer ring of the one-way bearing (24) is also connected to the outer ring of the one-way bearing (24), a swivel (26) is provided at the end of the swivel plate (25) close to the axis of the impeller (5), a swivel seat (27) is provided on the rear side surface of the protective shell (2), and the swivel (26) is rotatably provided on the swivel seat (27).

9. The micro motor for aerospace use with easy heat dissipation according to claim 8, characterized in that: The rear end plate (18) is provided with air holes (1801) at four corners, and dust holes (1902) coaxial with the four air holes (1801) are provided at four corners on the end surface of the rear cover (19). The air holes (1801) are provided with bell mouths (28), and the inner side surface of the bell mouth (28) contacts the sealing plate (29). The sealing plate (29) is provided with a sliding rod (30) along the axial direction. The sliding rod (30) is slidably arranged on the support plate (31), and the support plate (31) is fixedly arranged on the inner wall surface of the rear cover (19). The outer sleeve of the sliding rod (30) is provided with a spring three (32), and the two ends of the spring three (32) are respectively connected to the sealing plate (29) and the support plate (31).

10. The micro motor for aerospace use with easy heat dissipation according to claim 9, characterized in that: The sliding rod (30) is provided with a plug (33) at one end close to the dust hole (1902), a dust collecting cylinder (34) is provided on the dust hole (1902), an inclined hole (3401) is provided at one end of the dust collecting cylinder (34) close to the plug (33), the plug (33) is in contact with the inclined hole (3401), and a circular filter (35) is provided at the opening of the dust collecting cylinder (34) away from the plug (33).

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