Magnetic levitation motor for satellite circulation heating

Abstract

The present invention discloses a magnetic levitation motor for satellite circulating heating, comprising a housing, a rotating shaft, a stator assembly, a front magnetic bearing assembly, and a rear magnetic bearing assembly installed in the housing, the left end of the housing being sealed by a left end cover, the right end of the housing being sealed by a right end cover, a volute being sealedly connected to the left end surface of the left end cover, the volute being provided with a water inlet and a water outlet, both of which are connected to the volute cavity of the volute, an impeller being installed at the left end of the rotating shaft, the impeller being located in the volute cavity, a central through hole being provided in the center of the rotating shaft, and the conductive coils of the stator assembly, the front magnetic bearing assembly, and the rear magnetic bearing assembly being insulated and sealed. The present invention has the beneficial effects of: the stator assembly, the front magnetic bearing assembly, and the rear magnetic bearing assembly being able to operate normally in water, thereby being able to provide circulating heating for the satellite, and the water being able to circulate in the housing, eliminating the need to design a cooling channel, thereby reducing the volume of the magnetic levitation motor.

Description

Technical Field

[0001] The present invention relates to satellite circulating heating equipment, in particular to a magnetic levitation motor for satellite circulating heating. Background Art

[0002] With the development of science and technology, satellites have become one of the indispensable weapons of a powerful country. The working environment of satellites is a vacuum environment with a low temperature, and they need to be circulated and heated. Therefore, a pump is needed to circulate and heat the satellite. In order to improve the space utilization rate of the satellite, the pump needs to be prevented from being immersed in water. The existing pumps cannot meet this requirement. Therefore, after long-term research, the inventor has developed a magnetic levitation motor immersed in water. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a magnetic levitation motor for satellite circulation heating.

[0004] The objectives of the present invention are achieved through the following technical solutions: a magnetic levitation motor for satellite circulating heating, comprising a casing, in which a rotating shaft, a stator assembly, a front magnetic bearing assembly and a rear magnetic bearing assembly are installed, the left end of the casing is sealed by a left end cover, and the right end of the casing is sealed by a right end cover, a volute is sealed on the left end face of the left end cover, a water inlet and a water outlet are provided on the volute, and the water inlet and the water outlet are both connected to the volute cavity of the volute, an impeller is installed on the left end of the rotating shaft, the impeller is located in the volute cavity, a center through hole is provided in the center of the rotating shaft, and the conductive coils of the stator assembly, the front magnetic bearing assembly and the rear magnetic bearing assembly are all insulated and sealed.

[0005] Optionally, the stator assembly includes a stator core, an insulating frame c and a coil winding, the coil winding is a conductive coil of the stator assembly, the stator core is installed in the casing, the stator core and the coil winding are installed on the insulating frame c, and the stator core and the coil winding are insulated and separated by the insulating frame c, the insulating frame c is also plastic-sealed with an insulating plastic sealing part, and the coil winding is plastic-sealed in the insulating plastic sealing part, and the lead wire of the coil winding passes through the surface of the insulating plastic sealing part.

[0006] Optionally, the rear magnetic bearing assembly includes a shell, which is installed in the casing. A radial displacement detection device, a radial magnetic bearing stator and an axial displacement adjustment device are installed on the shell from left to right. The radial bearing stator coil of the radial magnetic bearing stator is sealed by an insulating plastic sealing member, and the axial displacement adjustment coil of the axial displacement adjustment device is insulated and sealed by plastic sealing glue.

[0007] Optionally, the front magnetic bearing assembly includes a support frame, a detection assembly is installed at the left end of the inner cavity of the support frame, the disk to be tested on the rotating shaft is located on the left side of the detection assembly, and a radial magnetic bearing stator is also installed at the rear end of the inner cavity of the support frame, and the radial bearing stator coil of the radial magnetic bearing stator is plastic-sealed by an insulating plastic sealing member.

[0008] Optionally, the radial magnetic bearing stator also includes a radial bearing stator core, on which magnetic poles are arranged in pairs, an insulating frame a is mounted on the magnetic poles, radial bearing stator coils are wound on the insulating frame a, and several radial bearing stator coils are all plastic-encapsulated in an insulating plastic encapsulation component.

[0009] Optionally, the axial displacement adjustment device includes a left mounting plate, a right mounting plate and a bushing, the bushing is located between the left mounting plate and the right mounting plate, and the left mounting plate, the bushing and the right mounting plate are locked by a locking screw, there is a gap between the left mounting plate and the right mounting plate to accommodate the outer disk of the thrust plate, and there is a gap between the left mounting plate and the right mounting plate and the outer disk of the thrust plate, the right end face of the left mounting plate and the left end face of the right mounting plate are both provided with an annular groove, an insulating frame b is installed in the annular groove, an annular mounting groove is provided on the insulating frame b, the axial displacement adjustment coil is wound in the mounting groove, and the annular groove is plastic-sealed with plastic sealing glue.

[0010] Optionally, a lead hole is provided on the outer wall of the insulating frame b, and lead holes are provided on the left mounting plate and the right mounting plate. The coil has a lead wire, which passes through the lead hole. The lead wire on the left passes through the lead hole of the left mounting plate, and the lead wire on the right passes through the lead hole of the right mounting plate.

[0011] Optionally, a drainage groove is provided on the outer side wall of the insulating frame b, and the drainage groove is connected to the lead hole, and the plastic encapsulating glue flows from the drainage groove and seals the lead hole.

[0012] Optionally, the outer wall of the shell is provided with wire outlet slots corresponding to the radial displacement detection device, the radial magnetic bearing stator and the axial displacement adjustment device, and the lead wires of the radial displacement detection device, the radial bearing stator coil and the axial displacement adjustment coil pass through the corresponding wire outlet slots.

[0013] Optionally, annular sealing grooves are provided on the left end cover, the right end cover and the volute, and O-rings are installed in the annular sealing grooves.

[0014] The present invention has the following advantages: the casing of the magnetic levitation motor of the present invention is filled with water, and the conductive coils of the stator assembly, the front magnetic bearing assembly and the rear magnetic bearing assembly are all insulated and sealed, so that the stator assembly, the front magnetic bearing assembly and the rear magnetic bearing assembly can also work normally in the water, thereby being able to circulate heat for the satellite, and the water can also form a cycle in the casing, without the need to design a cooling channel, thereby reducing the volume of the magnetic levitation motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of the present invention

[0016] Figure 2 A schematic cross-sectional view of the present invention

[0017] Figure 3 Schematic diagram of the structure of the rear magnetic bearing assembly;

[0018] Figure 4 It is a cross-sectional schematic diagram of the present invention;

[0019] Figure 5 is a schematic cross-sectional view of the shell;

[0020] Figure 6 Schematic diagram of the structure of the radial magnetic bearing stator;

[0021] Figure 7 This is a schematic diagram of the installation of the radial bearing stator coil;

[0022] Figure 8 Schematic diagram of the structure of the radial bearing stator core;

[0023] Figure 9 It is a structural diagram of the insulating skeleton a;

[0024] Figure 10 It is a structural schematic diagram of the axial displacement adjustment device;

[0025] Figure 11 is a cross-sectional schematic diagram of the axial displacement adjustment device;

[0026] Figure 12 for Figure 11 A magnified schematic diagram of point A in the middle;

[0027] Figure 13 Schematic diagram of the structure of the insulating skeleton b;

[0028] Figure 14 Schematic diagram of the stator assembly

[0029] Figure 15 Schematic diagram of the cross-section of the stator assembly

[0030] Figure 16 Schematic diagram of the stator core structure Figure 1

[0031] Figure 17 Schematic diagram of the stator core structure Figure 2

[0032] Figure 18 Schematic diagram of the structure of the insulating skeleton c

[0033] 1- housing, 2- left end cover, 3- right end cover, 4- junction box, 5- volute, 6- water inlet, 7- water outlet, 8- impeller, 9- test disk, 10- detection assembly, 11- rotating shaft, 12- stator assembly, 13- rear magnetic bearing assembly, 14- wire clamp, 15- potting glue, 16- support frame, 17- front magnetic bearing assembly, 101- stator core, 102- insulation skeleton, 103- coil winding, 104- insulation plastic sealing part, 105- lead wire, 106- convex tooth a, 107- flange a, 108- annular mounting groove, 109- limiting plate, 110- convex tooth b, 111- containing groove, 112- flange b, 113- limiting groove, 114- winding groove, 20 1-shell, 202-wire outlet slot, 203-first cavity, 204-second cavity, 205-third cavity, 206-radial displacement detection device, 207-radial magnetic bearing stator, 208-axial displacement adjustment device, 211-thrust plate, 212-left mounting plate, 213-right mounting plate, 214-bushing, 215-axial displacement adjustment coil, 216-locking screw, 217-insulating skeleton b, 218-plastic sealing glue, 219-mounting slot, 220-lead-out hole, 221-drainage slot, 231-radial bearing stator core, 232-insulating plastic sealing part, 233-insulating skeleton a, 234-magnetic pole, 235-flange, 236-radial bearing stator coil. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] like Figure 1 and Figure 2As shown, the magnetic levitation motor for satellite circulating heating includes a casing 1, in which a rotating shaft 11, a stator assembly 12, a front magnetic bearing assembly 17 and a rear magnetic bearing assembly 13 are installed. The left end of the casing 1 is sealed by a left end cover 2, and the right end of the casing 1 is sealed by a right end cover 3. A volute 5 is sealed on the left end surface of the left end cover 2, and a water inlet 6 and a water outlet 7 are provided on the volute 5. The water inlet 6 and the water outlet 7 are both connected to the volute cavity of the volute 5. An impeller 8 is installed on the left end of the rotating shaft 11, and the impeller 8 is located in the volute cavity. A central through hole is provided in the center of the rotating shaft 11. In this embodiment, the rotating shaft 11 rotates under the drive of the stator assembly 12, thereby driving the impeller 8 to rotate in the volute 5. After the impeller 8 rotates, the water liquid in the volute 5 is pressurized and discharged from the water outlet 7. Moreover, after the water is discharged, the volute cavity pressurizes the water in the water inlet 6. The liquid has a water absorption effect, thereby sucking the water into the volute cavity, and when the impeller 8 rotates, the water at the edge of the volute 5 is in a pressurized state, while the water in the middle of the volute 5 is in a depressurized state, so that the water enters the right end cover 3 along the gap between the rotating shaft 11 and the front magnetic bearing assembly 17, the stator assembly 12, and the rear magnetic bearing assembly 13. Finally, the water enters from the right end of the rotating shaft 11 through the central through hole and is discharged from the left end of the rotating shaft 11, so that the water in the casing 1 forms a cycle, which can take away heat. That is to say, the magnetic levitation motor no longer needs to set a heat dissipation channel on the casing 1. In order to avoid the influence of water on the stator assembly 12, the front magnetic bearing assembly 17 and the rear magnetic bearing assembly 13, the conductive coils of the stator assembly 12, the front magnetic bearing assembly 17 and the rear magnetic bearing assembly 13 are all insulated and sealed.

[0041] In this embodiment, if Figures 14-18As shown, the stator assembly 12 includes a stator core 101, an insulating frame c102 and a coil winding 103. The stator core 101 and the coil winding 103 are mounted on the insulating frame c102, and the stator core 101 and the coil winding 103 are insulated and separated by the insulating frame c102. The insulating frame c102 is also plastic-sealed with an insulating plastic sealing member 104, and the coil winding 103 is plastic-sealed in the insulating plastic sealing member 104. The lead wire of the coil winding 103 passes through the surface of the insulating plastic sealing member 104. The insulating frame c102 separates the coil winding 103 from the stator core 101, thereby ensuring the normal operation of the coil winding 103. The coil winding method of the coil winding 103 is the existing technology and can be based on According to actual needs, a suitable winding method is adopted. In this embodiment, the insulating skeleton c102 is a cylindrical structure, and an annular mounting groove 108 is provided on the outer surface of the insulating skeleton c102. A limit plate 109 is formed on both axial sides of the annular mounting groove 108. A plurality of winding grooves 114 distributed on the same circumference are provided on the inner surface of the insulating skeleton c102. A convex tooth b110 is formed between adjacent winding grooves 114. A radial accommodating groove 111 is provided on the convex tooth b110. The stator core 101 has a cylindrical structure. The stator core 101 is sleeved in the annular mounting groove 108, and the two end faces of the stator core 101 in the axial direction are in contact with the limit plate 109. The inner ring of the stator core 101 is also provided with a radial The protruding convex tooth a106 is fitted in the accommodating groove 111, and the insulating skeleton c102 is plastic-encapsulated. That is to say, the stator core 101 is first made, and then the stator core 101 is placed in the plastic-encapsulated mold, and finally plastic-encapsulated. After demolding, the connection between the insulating skeleton c102 and the stator core 101 is realized. In order to ensure the stability of the connection between the insulating skeleton c102 and the stator core 101, a flange a107 is provided at the end of the inner side of the convex tooth a106 in the circumferential direction, and a flange b112 is provided at the end of the inner side of the convex tooth b110 in the circumferential direction. A limiting groove 113 matching the flange a107 is provided on the flange b112. The convex tooth a106 The inner circumference diameter is the same as the inner circumference diameter of the convex tooth b110, and then the coil is installed on the insulating frame c102, and finally placed in another plastic packaging mold for plastic packaging. After plastic packaging, the coil winding 103 is plastic-sealed by the insulating plastic packaging part 104, and the lead wire of the coil winding 103 passes through the radial surface of the insulating plastic packaging part 104, and the connection between the lead wire and the insulating plastic packaging part 104 is sealed due to plastic packaging molding. Therefore, when the stator assembly 12 is immersed in water, it will not come into contact with the water, thereby ensuring the normal operation of the stator assembly 12, and the insulating plastic packaging part 104 is made of insulating material and will not affect the magnetic circuit direction of the coil winding 103.

[0042] In this embodiment, if Figure 3 、 Figure 4 and Figure 5 As shown, the rear magnetic bearing assembly 13 includes a housing 201, on which a radial displacement detection device 206, a radial magnetic bearing stator 207 and an axial displacement adjustment device 208 are sequentially installed from left to right. Further, the inner cavity of the housing 201 is sequentially provided with a first cavity 203, a second cavity 204 and a third cavity 205 from left to right, the radial displacement detection device 206 is installed in the first cavity 203, the radial magnetic bearing stator 207 is installed in the second cavity 204, and the axial displacement adjustment device 208 is installed in the third cavity 205, and the radial displacement detection device 206, the radial magnetic bearing stator 207 and the axial displacement adjustment device 20 8 are separated from each other. Furthermore, the radial bearing stator coil 236 of the radial magnetic bearing stator 207 is sealed by the insulating plastic sealing member 232, and the axial displacement adjustment coil 215 of the axial displacement adjustment device 208 is insulated and sealed by the plastic sealing glue 218. When the radial magnetic bearing stator 207 is immersed in water, the radial bearing stator coil 236 is sealed by the insulating plastic sealing member 232, and the axial displacement adjustment coil 215 is insulated and sealed by the plastic sealing glue 218. Therefore, the radial bearing stator coil 236 and the axial displacement adjustment coil 215 will not come into contact with the water and can work normally, so that the radial magnetic bearing stator 207 can be immersed in water and work stably.

[0043] In this embodiment, if Figure 6 and Figure 7 As shown, the radial magnetic bearing stator 207 includes a radial bearing stator core 231 and a radial bearing stator coil 236. Figure 8 and Figure 9As shown, magnetic poles 234 are arranged in pairs on the radial bearing stator core 231. In this embodiment, the magnetic poles 234 are octapole, 12-pole or 16-pole, and are evenly distributed on the same circumference. Preferably, the magnetic poles 234 are octapole, and an insulating frame a233 is mounted on the magnetic poles 234. The insulating frame a233 is wound with radial bearing stator coils 236, so that the radial bearing stator coils 236 are separated from the radial bearing stator core 231 by the insulating frame a233, so that the radial bearing stator coils 236 and the radial bearing stator core 231 are not conductive. Furthermore, several radial bearing stator coils 236 are all sealed in an insulating plastic. The radial bearing stator coil 236 is embedded in the sealing member 232, and the lead wire of the radial bearing stator coil 236 is led out from the radial direction of the insulating plastic sealing member 232. After the radial bearing stator coil 236 is plastic-sealed by the insulating plastic sealing member 232, the radial bearing stator coil 236 is embedded in a closed cavity. The insulating plastic sealing member 232 is neither conductive nor magnetic, so the insulating plastic sealing member 232 will not affect the magnetic force of the radial bearing stator coil 236. At the same time, when the radial magnetic bearing stator 207 is immersed in water, the water will not contact the radial bearing stator coil 236, so that the radial magnetic bearing stator 207 has good waterproof performance and can be immersed in water for normal use.

[0044] In this embodiment, a flange c235 extending circumferentially is provided at the inner end of the magnetic pole 234, and the insulating skeleton a233 is made by an injection molding process. That is, after the radial bearing stator core 231 is manufactured, the radial bearing stator core 231 is placed in an injection mold, and finally the insulating skeleton a233 is formed by injection molding. After the insulating skeleton a233 is injection-molded, due to the presence of the flange c235, the insulating skeleton a233 will not exit the magnetic pole 234. Of course, in order to ensure the winding of the radial bearing stator coil 236, the insulating skeleton a233 has corresponding winding grooves.

[0045] In this embodiment, the inner side wall of the magnetic pole 234 is an inner arc, and the inner arcs are distributed on the same circumference. When the shaft 11 rotates in the radial magnetic bearing stator 207, the distance between the shaft 11 and the inner arc is equal.

[0046] In this embodiment, the insulating plastic sealing part 232 is circular, and the inner ring diameter of the insulating plastic sealing part 232 is less than or equal to the diameter of the inner arc, and the outer ring diameter of the insulating plastic sealing part 232 is less than or equal to the diameter of the outer circle of the radial bearing stator core 231. Preferably, the inner ring diameter of the insulating plastic sealing part 232 is smaller than the diameter of the inner arc, and the outer ring diameter of the insulating plastic sealing part 232 is smaller than the diameter of the outer circle of the radial bearing stator core 231. In this way, during the plastic sealing process, the radial bearing stator coil 236 can be covered, and the consumables of the insulating plastic sealing part 232 can be reduced, and the weight of the radial magnetic bearing stator 207 can be reduced.

[0047] In this embodiment, if Figure 10 and Figure 11 As shown, the axial displacement adjustment device 208 includes a left mounting plate 212, a right mounting plate 213 and a bushing 214, wherein the left mounting plate 212 and the right mounting plate 213 are both supported by magnetic conductive materials, and the bushing 214 is located between the left mounting plate 212 and the right mounting plate 213, and the left mounting plate 212, the bushing 214 and the right mounting plate 213 are locked by a locking screw 216. Furthermore, there are multiple locking screws 216, and they are evenly distributed on the same circumference. In this embodiment, the axial displacement adjustment device 208 8 also includes connecting screws, which pass through the right mounting plate 213, the bushing 214 and the left mounting plate 212 from the right side to the left side in sequence and are connected to the housing 201, thereby realizing the installation of the axial displacement adjustment device 208 in the magnetic levitation motor. When the left mounting plate 212 and the right mounting plate 213 are installed, due to the presence of the bushing 214, there is a gap between the left mounting plate 212 and the right mounting plate 213 to accommodate the outer disc of the thrust plate 211. In this embodiment, in order to avoid the thrust plate 211 and the left mounting plate 2 12 and the right mounting plate 213 interfere with each other. When the thrust plate 211 is installed, there is a gap between the left mounting plate 212 and the right mounting plate 213 and the outer disc of the thrust plate 211. The right end surface of the left mounting plate 212 and the left end surface of the right mounting plate 213 are both provided with an annular groove. The annular groove is insulated and sealed with a coil. Since the coil is insulated and installed in the annular groove, the coil and the corresponding left mounting plate 212 and right mounting plate 213 will only conduct magnetism but not electricity. In other words, the left coil and the left mounting plate are insulated and sealed. The disk 212 forms a magnetic circuit, and the coil on the right forms a magnetic circuit with the right mounting disk 213. Then, by changing the magnitude and direction of the current in the coil, the magnitude of the force on the left and right sides of the thrust disk 211 can be changed, thereby realizing the adjustment of the axial position of the thrust disk 211, thereby realizing the adjustment of the axial displacement of the rotating shaft 11. Moreover, the coil is sealed and installed in the annular groove. Therefore, after the axial displacement adjustment device 208 is immersed in water, the coil will not contact the water, thereby ensuring the normal operation of the axial displacement adjustment device 208.

[0048] In this embodiment, if Figure 12 As shown, an insulating frame b217 is installed in the annular groove. Figure 13As shown, an annular mounting groove 219 is provided on the insulating skeleton b217, the coil is wound in the mounting groove 219, and the annular groove is plastic-sealed with plastic sealant 218. The insulating skeleton b217 is formed by plastic injection molding, so the insulating skeleton b217 is non-conductive and has a certain rigidity, and the coil can be wound in the mounting groove 219. After the coil is installed in the insulating skeleton b217, the insulating skeleton b217 is installed in the annular groove. Since the insulating skeleton b217 is made of plastic material, the insulating skeleton b217 can undergo a certain deformation. Therefore, the insulating skeleton b217 and the annular groove are tightly fitted, thereby ensuring the stability of the installation of the insulating skeleton b217 and the corresponding left mounting plate 212 or right mounting plate 213. After the insulating skeleton b217 is installed, the opening of the annular groove is sealed by a plastic sealing process. After the opening of the annular groove is sealed, the insulating skeleton b217 and the coil are plastic-sealed in the annular groove, thereby ensuring the sealing performance of the coil.

[0049] In this embodiment, a lead hole is provided on the outer wall of the insulating frame b217, and a lead hole 220 is provided on the left mounting plate 212 and the right mounting plate 213. The coil has a lead wire, and the lead wire passes through the lead hole, and the lead wire on the left passes through the lead hole 220 of the left mounting plate 212, and the lead wire on the right passes through the lead hole 220 of the right mounting plate 213. Furthermore, a drainage groove 221 is provided on the outer wall of the insulating frame b217, and the drainage groove 221 is connected to the lead hole. The plastic sealant 218 flows into the drainage groove 221 and seals the lead hole. During the plastic sealing process of the plastic sealing glue 218, the plastic sealing glue 218 flows into the lead hole through the drainage groove 221, thereby sealing the gap between the lead wire and the lead hole, ensuring the sealing performance of the lead wire and the lead hole. Furthermore, since the lead hole 220 corresponds to the corresponding lead hole, the plastic sealing glue 218 can also enter the gap between the lead wire and the lead hole 220, thereby ensuring the sealing performance between the lead wire and the lead hole 220, thereby further ensuring the reliability of the axial displacement adjustment device 208 when immersed in water.

[0050] In this embodiment, a wire outlet slot 202 corresponding to the radial displacement detection device 206, the radial magnetic bearing stator 207 and the axial displacement adjustment device 208 is opened on the outer wall of the shell, and the lead wires of the radial displacement detection device 206, the radial bearing stator coil 236 and the axial displacement adjustment coil 215 pass through the corresponding wire outlet slot 202.

[0051] In this embodiment, the front magnetic bearing assembly 17 includes a support frame 16, and a detection assembly 10 is installed at the left end of the inner cavity of the support frame 16. The detection assembly 10 is an existing structure and can generally be purchased commercially. An axial displacement sensor and a radial displacement sensor are plastic-sealed on the detection assembly 10, and the disk to be tested 9 on the rotating shaft 11 is located on the left side of the detection assembly 10. The axial displacement sensor detects the relative position of the disk to be tested 9 to detect the axial displacement of the rotating shaft 11. A radial magnetic bearing stator is also installed at the rear end of the inner cavity of the support frame 16, and the radial bearing stator coil of the radial magnetic bearing stator is plastic-sealed by an insulating plastic sealing member. The structure of the radial magnetic bearing stator is the same as the radial magnetic bearing stator structure on the rear magnetic bearing assembly 13.

[0052] In this embodiment, annular sealing grooves are provided on the left end cover 2, the right end cover 3 and the volute 5, and O-rings are installed in the annular sealing grooves, thereby ensuring the sealing performance of the left end cover 2, the right end cover 3 and the casing 1, as well as the sealing performance of the left end cover 2 and the volute 5.

[0053] In this embodiment, a junction box 4 is further provided on the casing 1, and a wire clamp 14 is provided at the bottom of the junction box 4. The wire clamp 14 can be used to fix the lead wires, and after the lead wires are led out and connected to the connectors on the junction box 4, the inner cavity of the junction box 4 is sealed with potting glue 15.

[0054] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A magnetic levitation motor for satellite heat circulation, comprising a housing, a rotating shaft, a stator assembly, a front magnetic bearing assembly, and a rear magnetic bearing assembly mounted within the housing, characterized in that: The left end of the casing is sealed by a left end cover, and the right end of the casing is sealed by a right end cover. A volute is sealed on the left end surface of the left end cover, and a water inlet and a water outlet are provided on the volute. Both the water inlet and the water outlet are connected to the volute cavity of the volute. An impeller is installed at the left end of the rotating shaft, and the impeller is located in the volute cavity. A central through hole is provided at the center of the rotating shaft. The conductive coils of the stator assembly, the front magnetic bearing assembly and the rear magnetic bearing assembly are all insulated and sealed. The stator assembly includes a stator core, an insulating skeleton c and a coil winding. The coil winding is the conductive coil of the stator assembly. The stator core is installed in the casing, and the stator core and the coil winding are installed on the insulating skeleton c. The stator core and the coil winding are insulated and separated by the insulating skeleton c. The insulating skeleton c has a cylindrical structure. An insulating plastic sealing part is also sealed on the insulating skeleton c, and the coil winding is sealed in the insulating plastic sealing part, and the lead wire of the coil winding passes through the surface of the insulating plastic sealing part; the rear magnetic bearing assembly includes a shell, which is installed in the casing, and a radial displacement detection device, a radial magnetic bearing stator and an axial displacement adjustment device are installed on the shell from left to right. The radial bearing stator coil of the radial magnetic bearing stator is sealed by the insulating plastic sealing part, and the axial displacement adjustment coil of the axial displacement adjustment device is insulated and sealed by plastic sealing glue; the front magnetic bearing assembly includes a support frame, and a detection assembly is installed at the left end of the inner cavity of the support frame, the disk to be tested on the rotating shaft is located on the left side of the detection assembly, and a radial magnetic bearing stator is also installed at the rear end of the inner cavity of the support frame, and the radial bearing stator coil of the radial magnetic bearing stator is sealed by the insulating plastic sealing part.

2. The magnetic levitation motor for satellite circulation heating according to claim 1 is characterized in that: The radial magnetic bearing stator also includes a radial bearing stator core, on which magnetic poles are arranged in pairs, and an insulating frame a is mounted on the magnetic poles, on which the radial bearing stator coils are wound, and several of the radial bearing stator coils are plastic-encapsulated in an insulating plastic encapsulation component.

3. The magnetic levitation motor for satellite circulation heating according to claim 2 is characterized in that: The axial displacement adjustment device includes a left mounting plate, a right mounting plate and a bushing, the bushing is located between the left mounting plate and the right mounting plate, and the left mounting plate, the bushing and the right mounting plate are locked by a locking screw, there is a gap between the left mounting plate and the right mounting plate to accommodate the outer disk of the thrust plate, and there is a gap between the left mounting plate and the right mounting plate and the outer disk of the thrust plate, the right end face of the left mounting plate and the left end face of the right mounting plate are both provided with an annular groove, an insulating skeleton b is installed in the annular groove, an annular mounting groove is provided on the insulating skeleton b, the axial displacement adjustment coil is wound in the mounting groove, and the annular groove is plastic-sealed with plastic sealing glue.

4. The magnetic levitation motor for satellite circulation heating according to claim 3 is characterized in that: A lead hole is provided on the outer wall of the insulating frame b, and lead holes are provided on the left mounting plate and the right mounting plate. The coil has a lead wire, and the lead wire passes through the lead hole. The lead wire on the left passes through the lead hole of the left mounting plate, and the lead wire on the right passes through the lead hole of the right mounting plate.

5. The magnetic levitation motor for satellite circulation heating according to claim 4 is characterized in that: A drainage groove is provided on the outer side wall of the insulating frame b, and the drainage groove is communicated with the lead hole. The plastic sealant flows into the drainage groove and seals the lead hole.

6. The magnetic levitation motor for satellite circulating heating according to claim 5 is characterized in that: The outer wall of the shell is provided with outlet grooves corresponding to the radial displacement detection device, the radial magnetic bearing stator and the axial displacement adjustment device, and the lead wires of the radial displacement detection device, the radial bearing stator coil and the axial displacement adjustment coil pass through the corresponding outlet grooves.

7. The magnetic levitation motor for satellite circulation heating according to claim 1 is characterized in that: Annular sealing grooves are provided on the left end cover, the right end cover and the volute, and O-type sealing rings are installed in the annular sealing grooves.

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