A high-speed motor with double synchronous drive

Abstract

The application discloses a high-speed motor with double synchronous driving, which comprises a rotating shaft and a shell, a top liquid cooling support block is fixed in the top of the shell, an upper mounting plate is fixed on the top surface of the top liquid cooling support block, the top of an extension sleeve body is fixed in the middle part of the top liquid cooling support block, the rotating shaft is inserted into the middle through hole of the extension sleeve body, an outer rotor iron core is mounted on the lower outer side wall of the rotating shaft, a first multi-pole driving magnetic ring is fixed on the inner side wall of the outer rotor iron core, a second multi-stage driving magnetic ring is fixed on the outer side wall of the outer rotor iron core, an inner stator assembly is fixed on the outer side wall of the extension sleeve body, the inner stator assembly corresponds to the first multi-pole driving magnetic ring, an outer stator assembly is fixed on the lower inner side wall of the shell, and the outer stator assembly corresponds to the second multi-stage driving magnetic ring. The first multi-pole driving magnetic ring, the second multi-stage driving magnetic ring, the inner stator assembly and the outer stator assembly are correspondingly arranged to form double driving, so that the torque is increased and the power is improved.

Description

Technical fields:

[0001] This invention relates to the field of motor technology, and more specifically to a high-speed motor with dual synchronous drive. Background technology:

[0002] Existing high-speed motors, such as the high-speed liquid-cooled motor described in Chinese patent application number 202122424089.2, use magnetic levitation to achieve high-speed rotation. However, the rotor only has multiple magnetic rings installed on the inner side. The rotor rotates by generating a magnetic field change between the magnetic rings and the coils on the stator. The power is only the movement of the multiple magnetic rings and coils on the inner side, and the torque is limited and needs to be improved.

[0003] Simultaneously, both coolant and air cooling are employed for heat dissipation, improving the overall cooling effect. A liquid-air separation device is formed by a cooling support block, a lower annular block, a liquid-cooled circulation sleeve, and an extension sleeve. The liquid is contained within the liquid-cooled circulation sleeve, while the air is outside. However, the cooling support block is fixed to the housing. During its manufacturing process, it is crucial to ensure that the centerline of the threaded hole in the cooling support block is perfectly aligned with the centerline of the threaded hole. Furthermore, the motor's main shaft is inserted into the extension sleeve and connected to a heat-conducting connecting block formed on the top of the extension sleeve via a bearing. The motor's main shaft also needs to align with the centerline of the threaded hole to ensure concentricity. Due to the extension... The extension sleeve is connected to the cooling support block by threads. Due to the large clearance of the threads, it is impossible to ensure that the central axis of the extension sleeve is concentric with the central threaded hole of the cooling support block. This will cause the central axis of the extension sleeve to tilt or deviate. The top of the spindle is connected to the heat-conducting connecting block formed on the top of the extension sleeve through a bearing. The bottom end of the spindle extends out of the bottom surface of the extension sleeve and connects to the lower part of the housing. The housing is fixed to the cooling support block. Therefore, when the extension sleeve deviates, its spindle will also deviate, which will cause the connection between the bottom end of the spindle and the housing to deviate. This will cause the bearing connecting the bottom end of the spindle and the housing to seize after running for a period of time, affecting its normal use. It requires frequent replacement of the bearing, resulting in poor performance.

[0004] Furthermore, existing stators are generally composed of multiple silicon steel sheets. Each silicon steel sheet has a high-temperature film on its surface when it leaves the factory to ensure insulation and rust prevention. Then, multiple connecting holes need to be punched on the silicon steel sheets. The side walls of the connecting holes extend downward to form riveting sleeves. These need to be stacked one on top of the other, with the upper riveting sleeve being inserted into the corresponding connecting hole of the lower silicon steel sheet to achieve connection. Because multiple connecting holes need to be punched on the silicon steel sheets, the high-temperature film on the surface of the silicon steel sheets will be broken, causing magnetic leakage between adjacent silicon steel sheets. This can easily cause losses between the silicon steel sheets in the magnetic field, affecting service life and magnetic conductivity, and failing to meet the requirements of high-speed motors. Summary of the Invention:

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-speed motor with dual synchronous drive. It adopts a first multi-pole drive magnetic ring, a second multi-stage drive magnetic ring, and inner stator assembly and outer stator assembly to form a dual drive, thereby increasing torque and improving power.

[0006] The solution of the present invention to the aforementioned technical problem is:

[0007] A high-speed motor with dual synchronous drive includes a shaft and a housing. A top liquid-cooled support block is fixed in the top of the housing, and an upper mounting plate is fixed on the top surface of the top liquid-cooled support block. A thermally conductive connecting sleeve is located in the top liquid-cooled support block. An extension sleeve extending downward is formed in the middle of the bottom surface of the thermally conductive connecting sleeve. The top of the extension sleeve is fixed to the middle of the top liquid-cooled support block, and the lower part of the extension sleeve extends out of the bottom surface of the top liquid-cooled support block. The shaft is inserted into the middle through hole of the thermally conductive connecting sleeve and the middle part of the extension sleeve. In the through hole, the top output end of the rotating shaft extends out of the top surface of the middle through hole of the upper mounting plate. An outer rotor core is installed on the lower outer side wall of the rotating shaft. A first multi-pole driving magnetic ring is fixed on the inner side wall of the outer rotor core. A second multi-stage driving magnetic ring is fixed on the outer side wall of the outer rotor core. An inner stator assembly is fixed on the outer side wall of the extension sleeve. The inner stator assembly corresponds to the first multi-pole driving magnetic ring. An outer stator assembly is fixed on the lower inner side wall of the housing. The outer stator assembly corresponds to the second multi-stage driving magnetic ring.

[0008] A lower annular block is fixed to the bottom surface of the top liquid-cooled support block, and a liquid-cooled circulation sleeve is fixed to the bottom surface of the lower annular block. The through hole in the middle of the lower annular block communicates with the liquid-cooled circulation sleeve. The liquid-cooled circulation sleeve is inserted into the first multi-pole drive magnetic ring, and the inner stator assembly is inserted into the liquid-cooled circulation sleeve.

[0009] The outer wall of the middle part of the rotating shaft is close to the inner wall of the extension sleeve, and there is a gap between the outer wall of the middle part of the rotating shaft and the inner wall of the extension sleeve.

[0010] The bottom plate of the liquid cooling circulation sleeve has an insertion hole in the middle, and the outer side wall of the bottom end of the extension sleeve is engaged with the inner side wall of the insertion hole of the bottom plate of the liquid cooling circulation sleeve.

[0011] The upper part of the rotating shaft is movably connected to the heat-conducting connecting sleeve through two stacked first bearings, and the bottom end of the rotating shaft is movably connected to the bottom plate of the housing through a second bearing.

[0012] The top surface of the top liquid-cooled support block has a downwardly extending central groove formed in the middle, the bottom surface of the top liquid-cooled support block has a downwardly extending protruding connecting part formed in the middle, the bottom surface of the central groove has a downwardly extending stepped through hole formed in the middle, and the bottom end of the stepped through hole extends out of the middle of the bottom surface of the protruding connecting part.

[0013] The stepped through hole includes an upper large-diameter hole section, a middle threaded hole section, and a bottom small-diameter hole section. The lower part of the heat-conducting connecting sleeve is inserted into the upper large-diameter hole section of the stepped through hole. The bottom edge of the heat-conducting connecting sleeve is pressed against the bottom surface of the upper large-diameter hole section of the stepped through hole. The upper part of the extension sleeve is a stepped sleeve section, which includes an upper large-diameter threaded part, a middle connecting sleeve part, and a bottom connecting sleeve part, with the outer diameter gradually decreasing from top to bottom. The upper large-diameter threaded part is threaded to the middle threaded hole section of the stepped through hole, and the outer wall surface of the middle connecting sleeve part is in close contact with the inner side wall of the bottom small-diameter hole section of the stepped through hole.

[0014] The central groove is connected to and opposite to the annular groove formed in the center of the bottom surface of the upper mounting plate, and the heat-conducting connecting sleeve is inserted into the central groove and the annular groove.

[0015] The bottom surface of the base plate of the shell is fixed with a lower shell. The top surface of the side of the lower shell is formed with a downwardly extending arc-shaped liquid guiding groove. The bottom surface of the side of the base plate of the lower shell is formed with an upwardly extending screw hole. The screw hole communicates with the arc-shaped liquid guiding groove. The water inlet connector is screwed into the screw hole and communicates with the screw hole.

[0016] The bottom edge of the housing has an upwardly extending hole that communicates with an externally threaded flow groove formed on the outer side wall of the housing. The upwardly extending hole also communicates with an arc-shaped liquid guiding groove. An outer sleeve is installed on the outer side wall of the housing, with the inner side wall of the outer sleeve tightly attached to the outer side wall of the housing. The top edge of the housing has a downwardly extending hole that communicates with the upper part of the externally threaded flow groove. The top of the hole communicates with the bottom end of the liquid inlet hole formed on the bottom edge of the top liquid cooling support block. The top of the liquid inlet hole communicates with a side liquid inlet hole formed on the inner side wall of the central groove. Multiple arc-shaped grooves are formed on the bottom surface of the central groove, and these arc-shaped grooves communicate with the liquid cooling circulation sleeve.

[0017] A side liquid outlet hole is formed on the inner wall of the central groove, and a vertical screw hole is formed on the bottom edge of the top liquid cooling support block. The vertical screw hole communicates with the side liquid outlet hole, and a drain connector is screwed into the vertical screw hole.

[0018] Multiple heat sinks are fixed on the outer wall of the heat-conducting connecting sleeve. The top surface of the heat-conducting connecting sleeve presses against the top surface of the annular groove. A downwardly extending limiting ring is formed on the bottom surface around the through hole in the middle of the annular groove. The limiting ring is inserted into the upper large-diameter hole section of the top stepped through hole of the heat-conducting connecting sleeve. Two outer rings of first bearings are fixedly fastened on the inner wall of the upper large-diameter hole section of the top stepped through hole. The top surface of the limiting ring presses against the top surface of the outer ring of the upper first bearing, and the bottom surface of the outer ring of the lower first bearing presses against the bottom surface of the upper large-diameter hole section of the top stepped through hole.

[0019] The rotating shaft includes a central main shaft, a small-diameter stepped connecting shaft is formed in the middle of the top surface of the central main shaft, a rotating wheel is formed in the lower outer wall of the central main shaft, and a limit support sleeve is inserted in the lower large-diameter section of the small-diameter stepped connecting shaft. The outer wall of the limit support sleeve is engaged with the inner wall of the lower small-diameter hole section of the top stepped through hole.

[0020] The upper small-diameter shaft of the small-diameter stepped connecting shaft is inserted into the inner ring of the two first bearings, and the outer side wall of the upper small-diameter shaft is close to the inner side wall of the inner ring of the first bearing.

[0021] A limiting sleeve is fixed on the small-diameter stepped connecting shaft. The limiting sleeve is inserted into the middle through hole of the upper mounting plate. The bottom surface of the limiting sleeve is close to or presses against the top surface of the inner ring of the first bearing. An air inlet annular groove is provided between the outer wall of the limiting sleeve and the middle through hole of the upper mounting plate.

[0022] An outer protective sleeve is fixed on the outer side wall of the rotor section, and an outer rotor core is installed on the inner side wall of the outer protective sleeve. An air guide gap is formed between the outer side wall of the outer protective sleeve and the outer stator assembly. Multiple air inlet guide slots are formed on the edge of the bottom plate of the housing. The air inlet guide slots are connected to the air guide gaps. The air inlet guide slots are connected to a main annular groove formed on the top surface of the edge of the lower housing. A side air outlet pipe is formed on the outer side wall of the lower housing. The side air outlet pipe is connected to the main annular groove.

[0023] The bottom plate of the housing has a downwardly extending stepped through hole at the top center. The stepped through hole includes a first stepped hole section, a second stepped hole section, a third stepped hole section, and a fourth threaded hole section with diameters decreasing from top to bottom. The outer ring of the second bearing is fixed on the inner wall of the second stepped hole section. A fixing seat is fixed on the inner wall of the first stepped hole section. The bottom edge of the fixing seat presses against the bottom surface of the first stepped hole section. The lower annular permanent magnet ring is fixed on the fixing seat. A bottom annular mounting groove is formed in the center of the bottom surface of the rotating wheel. The upper annular permanent magnet ring is fixed on the inner wall of the bottom annular mounting groove. The top surface of the upper annular permanent magnet ring presses against the center of the bottom surface of the rotating wheel. The upper annular permanent magnet ring is directly above the lower annular permanent magnet ring. The magnetic poles of the upper annular permanent magnet ring and the lower annular permanent magnet ring are the same on their adjacent wall surfaces.

[0024] The bottom of the central spindle is inserted or locked in the upper annular permanent magnet ring and inserted in the lower annular permanent magnet ring. A lower connecting shaft is formed in the middle of the bottom surface of the central spindle. The lower connecting shaft is inserted in the inner ring of the second bearing. The top surface of the inner ring of the second bearing is close to the bottom surface of the central spindle, and the outer side wall of the lower connecting shaft is close to the inner side wall of the inner ring of the second bearing.

[0025] The edge of the rotating part has at least three air inlets, which are arranged in a ring array around the central axis of the rotating shaft. At least one of the air inlets has an inner sidewall that is inclined.

[0026] The inner stator assembly includes an inner stator and a coil wound on the inner stator. The inner stator includes a cylindrical body composed of multiple silicon steel sheets stacked vertically. Multiple outwardly extending winding portions are formed on the outer wall of the cylindrical body, and a stator center through hole with a polygonal cross-section is formed in the middle of the cylindrical body.

[0027] The tube wall at the bottom of the stepped sleeve of the extension sleeve is a polygonal tube wall surface, which is inserted into the positioning center through hole. The polygonal tube wall surface is pressed against the wall surface of the positioning center through hole, and the bottom edge of the stepped sleeve of the extension sleeve is pressed against the top surface of the cylindrical body.

[0028] Both the outer wall of the cylindrical body and the outer wall of the winding part are coated with an anti-rust and insulating coating.

[0029] The outstanding effects of this invention are:

[0030] 1. It adopts a dual drive system consisting of a first multi-pole drive magnetic ring, a second multi-stage drive magnetic ring, an inner stator assembly, and an outer stator assembly, which increases torque and improves power.

[0031] 2. All the silicon steel sheets in its inner stator do not require punching or other operations. After being stacked together, they are fixed by the anti-rust and insulating coating applied to the outer wall surface. The fixation is firm and tight, and there is no magnetic leakage between the silicon steel sheets, which ensures its service life. Moreover, the central through hole of its stator is a regular polygonal through hole, which is in close contact with the polygonal tube wall surface of the extension sleeve, ensuring a locking and fixing effect. At the same time, it prevents relative rotation between the extension sleeve and the inner stator, resulting in good positioning effect. Furthermore, because the polygonal outer wall surface of the connecting bushing is in close contact with the polygonal inner wall of the central through hole, the heat transfer of the silicon steel sheets is fast and effective.

[0032] 3. The lower part of its heat-conducting connecting sleeve is inserted into the upper large-diameter section of the stepped through hole. The upper part of the extended sleeve is a stepped sleeve section. The upper large-diameter screw-in part of the stepped sleeve section is screwed into the middle screw-in section of the stepped through hole. The outer wall surface of the middle connecting sleeve part of the stepped sleeve section is in close contact with the inner side wall of the bottom small-diameter section of the stepped through hole to achieve positioning. This ensures that the heat-conducting protective sleeve and the stepped through hole of the top liquid-cooled support block are basically concentric, meeting the design requirements. It also ensures that the rotating shaft is basically concentric with the stepped through hole, ensuring that the second bearing connecting the lower connecting shaft part of the rotating shaft to the housing operates normally and will not jam, thus ensuring the normal operation of the entire equipment. Attached image description:

[0033] Figure 1 This is a partial structural schematic diagram of the present invention;

[0034] Figure 2 yes Figure 1 Schematic diagram of local structure at different angles

[0035] Figure 3 This is a partial cross-sectional view of the present invention;

[0036] Figure 4 This is a partial cross-sectional view of another location in the present invention;

[0037] Figure 5 This is a partial structural diagram of the present invention with components such as the top liquid-cooled support block and the upper mounting plate removed;

[0038] Figure 6 This is a partial bottom view of the pivot point;

[0039] Figure 7 This is a partial exploded view of the shaft and the outer protective sleeve.

[0040] Figure 8 This is a schematic diagram of a local structure at the inner stator;

[0041] Figure 9 It is a partial cross-sectional view of the inner stator (which shows each silicon steel sheet);

[0042] Figure 10 This is a schematic diagram of a partial structure of the shell;

[0043] Figure 11 This is a partial cross-sectional view of the top liquid-cooled support block of the present invention;

[0044] Figure 12 This is a partial structural diagram of the top liquid-cooled support block, liquid-cooled circulation sleeve, and other components of the present invention;

[0045] Figure 13 This is a partial structural schematic diagram of the lower housing of the present invention;

[0046] Figure 14 This is a partial structural diagram of the outer rotor core of the present invention. Detailed implementation method:

[0047] For example, see below. Figures 1 to 14As shown, a high-speed motor with dual synchronous drive includes a rotating shaft 10 and a housing 20. A radially extending edge is formed on the top outer wall of the housing 20. A top liquid-cooled support block 30 is fixed to the top surface of the radially extending edge. An upper mounting plate 40 is fixed to the top surface of the top liquid-cooled support block 30. A thermally conductive connecting sleeve 60 is located within the top liquid-cooled support block 30. A downwardly extending extension sleeve 61 is formed in the middle of the bottom surface of the thermally conductive connecting sleeve 60. The top of the extension sleeve 61 is fixed to the middle of the top liquid-cooled support block 30, and the lower part of the extension sleeve 61 extends out of the bottom surface of the top liquid-cooled support block 30. The rotating shaft 10 is inserted into the middle of the thermally conductive connecting sleeve 60. In the through hole and the middle through hole of the extension sleeve 61, the top output end of the rotating shaft 10 extends out of the top surface of the middle through hole of the upper mounting plate 40. An outer rotor core 50 is installed on the lower outer side wall of the rotating shaft 10. A first multi-pole driving magnetic ring 51 is fixed on the inner side wall of the outer rotor core 50. A second multi-stage driving magnetic ring 52 is fixed on the outer side wall of the outer rotor core 50. An inner stator assembly 70 is fixed on the outer side wall of the extension sleeve 61. The inner stator assembly 70 corresponds to the first multi-pole driving magnetic ring 51. An outer stator assembly 200 is fixed on the lower inner side wall of the housing 20. The outer stator assembly 200 corresponds to the second multi-stage driving magnetic ring 52.

[0048] A lower annular block 700 is fixed to the bottom surface of the middle part of the top liquid-cooled support block 30, a liquid-cooled circulation sleeve 80 is fixed to the bottom surface of the lower annular block 33, and an annular support block is also fixed to the bottom surface of the lower annular block 700. The radial part formed on the top outer wall of the liquid-cooled circulation sleeve 80 is located between the annular support block and the lower annular block 700. The liquid-cooled circulation sleeve 80 is inserted into the annular support block. The through hole in the middle of the lower annular block 700 communicates with the liquid-cooled circulation sleeve 80. The liquid-cooled circulation sleeve 80 is inserted into the first multi-pole drive magnetic ring 51. The inner stator assembly 70 is inserted into the liquid-cooled circulation sleeve 80.

[0049] The outer wall of the middle part of the rotating shaft 10 is close to the inner wall of the extension sleeve 61, and there is a gap 1010 between the outer wall of the middle part of the rotating shaft 10 and the inner wall of the extension sleeve 61.

[0050] The bottom plate of the liquid cooling circulation sleeve 80 has an insertion hole in the middle, and the outer side wall of the bottom end of the extension sleeve 61 is engaged with the inner side wall of the insertion hole of the bottom plate of the liquid cooling circulation sleeve 80.

[0051] The upper part of the rotating shaft 10 is movably connected to the heat-conducting connecting sleeve 60 through two stacked first bearings 1, and the bottom end of the rotating shaft 10 is movably connected to the bottom plate of the housing 20 through a second bearing 2.

[0052] The top liquid-cooled support block 30 has a downwardly extending central groove 31 formed in the middle of its top surface, and a downwardly extending protruding connecting part 32 formed in the middle of its bottom surface. The bottom surface of the central groove 31 has a downwardly extending stepped through hole 310 formed in the middle of its bottom surface, and the bottom end of the stepped through hole 310 extends out of the middle of the bottom surface of the protruding connecting part 32.

[0053] The stepped through hole 310 includes an upper large-diameter hole section, a middle threaded hole section, and a bottom small-diameter hole section. The lower part of the thermally conductive connecting sleeve 60 is inserted into the upper large-diameter hole section of the stepped through hole 310. The bottom surface of the edge of the thermally conductive connecting sleeve 60 is pressed against the bottom surface of the upper large-diameter hole section of the stepped through hole 310. The upper part of the extension sleeve 61 is a stepped sleeve section, which includes an upper large-diameter threaded part 611, a middle connecting sleeve part 612, and a bottom connecting sleeve part 613, with the outer diameter gradually decreasing from top to bottom. The upper large-diameter threaded part 611 is threaded to the middle threaded hole section of the stepped through hole 310. The outer wall surface of the middle connecting sleeve part 612 is in close contact with the inner side wall of the bottom small-diameter hole section of the stepped through hole 310.

[0054] The central groove 31 communicates with and is opposite to the annular groove 41 formed in the center of the bottom surface of the upper mounting plate 40. The heat-conducting connecting sleeve 60 is inserted into the central groove 31 and the annular groove 41.

[0055] The bottom surface of the base plate of the housing 20 is fixed with a lower housing 90. The top surface of the side of the lower housing 90 is formed with a downwardly extending arc-shaped liquid guiding groove 91. The bottom surface of the side of the base plate of the lower housing 90 is formed with an upwardly extending screw hole. The screw hole communicates with the arc-shaped liquid guiding groove 91. The water inlet connector 92 is screwed into the screw hole and communicates with the screw hole.

[0056] The bottom edge of the housing 20 has an upwardly extending hole 24, which communicates with an externally threaded flow groove 25 formed on the outer side wall of the housing 20. The upwardly extending hole 24 also communicates with an arc-shaped liquid guiding groove 91. An outer sleeve 26 is installed on the outer side wall of the housing 20. The top surface of the outer sleeve 26 presses against the bottom surface of the radially extending edge of the top of the housing 20. An inner radially extending edge is formed on the inner side wall of the bottom end of the outer sleeve 26, which is inserted into the annular groove on the outer side of the bottom end face of the housing 20. The top surface of the lower housing 90 presses against the housing 20. The inner wall of the outer sleeve 26 is closely attached to the outer wall of the shell 20. The top surface of the edge of the shell 20 is formed with a downwardly extending upper through hole 27. The lower end of the upper through hole 27 is connected to the upper part of the external thread flow groove 25. The top end of the upper through hole 27 is connected to the bottom end of the liquid inlet through hole 301 formed on the bottom edge of the top liquid cooling support block 30. The top of the liquid inlet through hole 301 is connected to the side liquid inlet hole 311 formed on the inner wall of the middle groove 31. Multiple arc-shaped through grooves 312 are formed on the bottom surface of the middle groove 31. The arc-shaped through grooves 312 are connected to the liquid cooling circulation sleeve 80.

[0057] A side outlet hole 313 is formed on the inner wall of the central groove 31, and a vertical screw hole is formed on the bottom edge of the top liquid cooling support block 30. The vertical screw hole communicates with the side outlet hole 313, and a drain connector 314 is screwed onto the vertical screw hole.

[0058] Multiple heat sinks 62 are fixed on the outer wall of the thermally conductive connecting sleeve 60. The top surface of the thermally conductive connecting sleeve 60 presses against the top surface of the annular groove 41. A downwardly extending limiting ring is formed on the bottom surface around the central through hole of the annular groove 41. The limiting ring is inserted into the upper large-diameter hole section of the top stepped through hole of the thermally conductive connecting sleeve 60. Two outer rings of the first bearings 1 are fixedly engaged on the inner wall of the upper large-diameter hole section of the top stepped through hole. The top surface of the limiting ring presses against the top surface of the upper outer ring of the first bearing 1, and the bottom surface of the lower outer ring of the first bearing 1 presses against the bottom surface of the upper large-diameter hole section of the top stepped through hole.

[0059] The rotating shaft 10 includes a central main shaft portion 11, a small-diameter stepped connecting shaft portion 12 is formed in the middle of the top surface of the central main shaft portion 11, a rotating wheel portion 13 is formed in the lower outer side wall of the central main shaft portion 11, and a limiting support sleeve 14 is inserted in the lower large-diameter section of the small-diameter stepped connecting shaft portion 12. The outer side wall of the limiting support sleeve 14 is engaged on the inner side wall of the lower small-diameter hole section of the top stepped through hole.

[0060] The upper small-diameter shaft of the small-diameter stepped connecting shaft 12 is inserted into the inner rings of the two first bearings 1, and the outer side wall of the upper small-diameter shaft is close to the inner side wall of the inner ring of the first bearing 1.

[0061] A limiting sleeve 15 is fixed on the small-diameter stepped connecting shaft 12. The limiting sleeve 15 is inserted into the middle through hole of the upper mounting plate 40. The bottom surface of the limiting sleeve 15 is close to or presses against the top surface of the inner ring of the first bearing 1. An air inlet annular groove 150 is provided between the outer wall of the limiting sleeve 15 and the middle through hole of the upper mounting plate 40.

[0062] An outer protective sleeve 131 is fixed on the outer side wall of the rotating part 13, and an outer rotor core 50 is installed on the inner side wall of the outer protective sleeve 131. An air guide gap 8 is formed between the outer side wall of the outer protective sleeve 131 and the outer stator assembly 200. The outer stator assembly 200 includes an annular stator (which is a common component and will not be described in detail) and coils wound on it. When the outer stator assembly 200 is energized, it will generate a magnetic field, which will produce a magnetic levitation effect with the second multi-stage drive magnetic ring 52, thereby ensuring that the components at the second multi-stage drive magnetic ring 52 will not shift.

[0063] The bottom plate of the housing 20 has multiple air inlet guide grooves 9 formed on its edge. The air inlet guide grooves 9 are connected to the air guide gaps 8. The air inlet guide grooves 9 are connected to the main annular groove 93 formed on the top surface of the edge of the lower housing 90. The outer side wall of the lower housing 90 has a side air outlet pipe 94 formed on its outer side wall. The side air outlet pipe 94 is connected to the main annular groove 93.

[0064] The bottom plate of the housing 20 has a downwardly extending lower mounting stepped through hole 21 formed on the top surface of the middle part. The lower mounting stepped through hole 21 includes a first stepped hole section, a second stepped hole section, a third stepped hole section and a fourth threaded hole section whose diameter gradually decreases from top to bottom. The outer ring of the second bearing 2 is fixed on the inner side wall of the second stepped hole section. A fixing seat is fixed on the inner side wall of the first stepped hole section. The bottom edge of the fixing seat presses against the bottom surface of the first stepped hole section. The lower annular permanent magnet ring 231 is fixed on the fixing seat. The bottom annular mounting groove is formed in the middle of the bottom surface of the rotating wheel part 13. The upper annular permanent magnet ring 133 is fixed on the inner side wall of the bottom annular mounting groove. The top surface of the upper annular permanent magnet ring 133 presses against the middle of the bottom surface of the rotating wheel part 13. The upper annular permanent magnet ring 133 is directly above the lower annular permanent magnet ring 231. The magnetic poles of the upper annular permanent magnet ring 133 and the lower annular permanent magnet ring 231 are the same on the wall surface.

[0065] The bottom of the central spindle portion 11 is inserted into the upper annular permanent magnet ring 133 and the lower annular permanent magnet ring 231. A lower connecting shaft portion 111 is formed in the middle of the bottom surface of the central spindle portion 11. The lower connecting shaft portion 111 is inserted into the inner ring of the second bearing 2. The top surface of the inner ring of the second bearing 2 is close to the bottom surface of the central spindle portion 11, and the outer side wall of the lower connecting shaft portion 111 is close to the inner side wall of the inner ring of the second bearing 2.

[0066] The rotating part 13 has at least three air inlets 134 formed on its side. The air inlets 134 are arranged in a ring array on the rotating part 13 with the central axis of the rotating shaft 10 as the center. At least one inner sidewall 135 of the air inlet 134 is inclined, which can draw air in from the air inlet 134 and make it flow upward when the rotating shaft 10 rotates.

[0067] The inner stator assembly 70 includes an inner stator and a coil wound on the inner stator. The inner stator includes a cylindrical body 100 composed of multiple silicon steel sheets 10 stacked vertically. Multiple outwardly extending winding portions 101 are formed on the outer side wall of the cylindrical body 100, and a stator center through hole 102 with a polygonal cross-section is formed in the middle of the cylindrical body 100.

[0068] The tube wall at the lower part of the stepped sleeve of the extension sleeve 61 is a polygonal tube wall surface, which is inserted into the positioning center through hole 102. The polygonal tube wall surface is pressed against the wall surface of the positioning center through hole 102, and the bottom edge of the stepped sleeve of the extension sleeve 61 is pressed against the top surface of the column 100.

[0069] The sidewalls, top and bottom surfaces of the cylindrical body 100, as well as the outer wall of the winding portion 101, are all coated with an anti-rust and insulating coating 1000. The anti-rust and insulating coating 1000 is 0.2mm to 0.5mm thick. The manufacturing process of the inner stator is as follows: After the silicon steel sheets 10 are stacked, the connecting shaft of the tooling is inserted into the central hole of all the silicon steel sheets 10, with both ends of the connecting shaft extending out of the top and bottom silicon steel sheets 10. Then, the fixing nuts are screwed on, and all the silicon steel sheets 10 are stacked to form the cylindrical body 100. Then, all the silicon steel sheets 10 with the tooling installed can be immersed in the anti-rust and insulating coating liquid to achieve coating. Then, they are removed, and after the tooling is removed, the top and bottom surfaces around the central through hole 102 of the cylindrical body 100 are not coated with the insulating and anti-rust coating layer 1000. The remaining outer wall surfaces are coated with an insulating and rust-proof coating layer 1000 and then dried, so that the insulating and rust-proof coating layer 1000 forms an integral kit attached to the side walls of all silicon steel sheets 10 as well as the walls of the top and bottom silicon steel sheets 10, thereby fixing all silicon steel sheets 10 and achieving insulation and rust prevention. Then, after the extension sleeve 61 and other components are installed, the walls around the central through hole 102 of the top and bottom silicon steel sheets 10 are coated with the insulating and rust-proof coating layer 1000 again to achieve full coating.

[0070] The positioning center through hole 102 is a regular dodecagonal through hole, and the tube wall at the lower part of the stepped sleeve of the extension sleeve 61 is a regular dodecagonal tube wall, which matches the positioning center through hole 102.

[0071] A sealing ring is clamped between the top edge of the top liquid-cooled support block 30 and the bottom surface of the upper mounting plate 40.

[0072] An upper sealing ring is clamped between the top surface of the heat-conducting connecting sleeve 60 and the top surface of the annular groove 41 formed in the middle of the bottom surface of the upper mounting plate 40.

[0073] A first density ring is held between the bottom center of the top liquid-cooled support block 30 and the top surface of the lower annular block 700.

[0074] Multiple sealing rings are clamped between the outer wall of the bottom end of the extension sleeve 61 and the inner wall of the insertion hole of the bottom plate of the liquid cooling circulation sleeve 80.

[0075] A third sealing ring is clamped between the top surface of the liquid cooling circulation sleeve 80 and the bottom surface of the lower annular block 700.

[0076] At least one through hole 72 is formed on the inner side wall of the lower annular block 700. A power connection socket 201 is fixed on the upper outer side wall of the housing 20. The outer sleeve 26 extends out of the power connection socket 201. The inner end of the power connection socket 201 is inserted into a through groove on the upper side wall of the housing 20 and corresponds to the through hole 72.

[0077] Furthermore, the liquid cooling circulation sleeve 80 is a non-metallic high-temperature resistant sleeve.

[0078] A radially extending edge is formed on the top outer wall of the limiting sleeve 15, and there is a gap between the radially extending edge and the middle top surface of the upper mounting plate 40. This gap communicates with the air inlet annular groove 150.

[0079] Furthermore, the housing 20 is made of aluminum; the first bearing 1 and the second bearing 2 are oil-free bearings.

[0080] Furthermore, a Hall sensor 309 is fixed to the center of the bottom surface of the top liquid-cooled support block 30, and the protruding connecting part 32 and the Hall sensor 309 are inserted into the through hole in the center of the lower annular block 700. The Hall sensor 309 can sense the magnetic field of the first multi-pole driving magnetic ring 51 in this embodiment and transmit the sensing signal to the control host. After receiving the signal, the control host can control the current direction of the outer stator assembly 200 and the inner stator assembly 70, thereby ensuring that the outer stator assembly 200 and the inner stator assembly 70 simultaneously perform work on the first multi-pole driving magnetic ring 51 and the second multi-stage driving magnetic ring 52, ensuring the stable operation of the rotating shaft 10. The coolant in this embodiment is an insulating and high-temperature resistant coolant.

[0081] The outer stator assembly 200 has a common structure and will not be described in detail. The end of the coil connecting wire of the outer stator assembly 200 extends out of the wire-passing holes aligned on the lower side wall of the housing 20 and the side wall of the outer casing 26 and is electrically connected to the power connection socket 201. Alternatively, a second power connection socket is installed on the outer side wall of the outer casing 26, and the end of the coil connecting wire of the outer stator assembly 200 is electrically connected to the second power connection socket (the second power connection socket is not shown in the attached drawings). This is a common structure and will not be described in detail. After the coil connecting wire passes through the wire-passing holes aligned on the lower side wall of the housing 20 and the side wall of the outer casing 26, it needs to be sealed with sealing material.

[0082] In this embodiment, the rotating shaft 11 can be made of metal materials such as titanium alloy or alloy steel.

[0083] In this embodiment, it is generally installed in a vertical position during use.

[0084] In this embodiment, the bottom and top of the rotating shaft 10 are supported by the first bearing 1 and the second bearing 2. The upper small-diameter shaft of the small-diameter stepped connecting shaft 12 is inserted into the inner ring of the first bearing 1, and the outer side wall of the upper small-diameter shaft of the small-diameter stepped connecting shaft 12 is close to the inner side wall of the inner ring of the first bearing 1, that is, the upper small-diameter shaft of the small-diameter stepped connecting shaft 12 and the inner ring of the first bearing 1 have a clearance fit. The lower connecting shaft 111 is inserted into the inner ring of the second bearing 2, and the outer side wall of the lower connecting shaft 111 is close to the inner side wall of the inner ring of the second bearing 2, that is, the inner ring of the second bearing 2 and the lower connecting shaft 111 have a clearance fit. This allows the rotating shaft 10 to make axial fine-tuning movements. In use, the relative movement between the balls in the first bearing 1 and the inner and outer rings of the second bearing 2 is greatly reduced, which greatly improves the service life of the first bearing 1 and the second bearing 2.

[0085] In this embodiment, during operation, the impeller fixed at the top of the small-diameter stepped connecting shaft 12 rotates to generate wind pressure. This wind pressure will cause a portion of the air volume to enter the air inlet annular groove 150 through the gap between the radial extension edge and the middle top surface of the upper mounting plate 40. Then, it will enter the annular through groove between the lower large-diameter section of the small-diameter stepped connecting shaft 12 and the limiting support sleeve 14 through the first bearing 1, and then enter the gap 1010. This ensures that the rotating shaft 10 and the inner side wall of the extension sleeve 61 form an air suspension and do not contact each other, thereby making the entire rotating shaft 10 run stably, reducing friction and wear, and achieving good results. Moreover, the air volume that enters can enter the housing 20 through the gap 1010 to exchange heat and cool down the components inside the housing 20.

[0086] The bottom plate of the housing 20 has multiple central arc-shaped through grooves formed in the middle, and the top surface of the lower housing 90 has an installation groove formed in the middle. The central arc-shaped through grooves are connected to the installation grooves, and the air inlet 134 is connected to the central arc-shaped through grooves. The bottom surface of the installation groove of the lower housing 90 has a downward-extending through hole formed in the middle. The through hole is connected to the downward-extending main air intake pipe formed in the middle of the bottom plate of the lower housing 90. When the rotating shaft 10 is running, its rotating wheel 13 rotates, so that the air below enters from the main air intake pipe, enters the installation groove, then enters the housing 20 through the central arc-shaped through grooves, and then flows upward through the air inlet 134.

[0087] Then, all the air enters the air guide gap 8 through the gap between the outer wall of the liquid cooling circulation sleeve 80 and the first multi-stage drive magnetic ring 51, then enters the air inlet guide groove 9, then enters the main annular groove 93 formed on the top side of the lower housing 90, and finally the air is discharged from the side air outlet 94.

[0088] Meanwhile, the coolant enters through the inlet connector 92 and then flows into the external threaded flow groove 25, where it exchanges heat with the housing 20. The coolant then enters the cavity between the central groove 31 and the annular groove 41 to exchange heat with components such as the heat-conducting connecting sleeve 60 and the heat sink 62. After that, it enters the liquid-cooled circulation sleeve 80 to exchange heat with the inner stator assembly 70. Finally, it flows out from the side outlet hole 313 of the central groove 31 to the drain connector 314, achieving rapid heat exchange with good heat exchange and heat dissipation effect and high efficiency.

[0089] Furthermore, by having the upper annular permanent magnet ring 133 and the lower annular permanent magnet ring 231 have the same magnetic poles on their close-to-wall surfaces, it achieves vertical levitation, ensuring the buoyancy of the vertical state of the rotating shaft 10 and greatly reducing the wear on the second bearing 2.

[0090] In this embodiment, the outer protective sleeve 131 is made of a non-magnetic material. The top surface of the inner wall of the outer protective sleeve 131 is formed with a downwardly extending annular mounting groove 1311, in which the outer rotor core 50 is inserted. Multiple vertical positioning grooves 1312 are formed on the inner wall of the annular mounting groove 1311, with the top of each groove extending beyond the top surface of the outer protective sleeve 131. Multiple vertical protruding positioning portions 53 are formed on the outer wall of the outer rotor core 50, and these portions are inserted into the corresponding vertical positioning grooves 1312.

[0091] Furthermore, the annular mounting groove 1311 has an internal thread formed on its top inner wall. The upper copper ring 136 is screwed onto the internal thread at the top of the annular mounting groove 1311. The bottom surface of the upper copper ring 136 presses against the top surface of the outer rotor core 50 and the top surface of the second multi-stage drive magnetic ring 52. The bottom surface of the outer rotor core 50 and the bottom surface of the second multi-stage drive magnetic ring 52 press against the bottom surface of the annular mounting groove 1311. The bottom surface of the outer protective sleeve 131 has an annular groove formed. The bottom balance copper ring 300 is nested in the annular groove and fixed to the outer protective sleeve 131. The top surface of the upper copper ring 136 and the bottom surface of the bottom balance copper ring 300 respectively have weight-reducing recesses for counterweight balance.

[0092] In this embodiment, the outer side wall of the first multi-pole driving magnetic ring 51 is formed with multiple vertical retaining strips, which are retained in retaining grooves formed on the inner side wall of the outer rotor core 50. The top surface of the vertical retaining strips presses against the bottom surface of the upper copper ring 136. The structure of the first multi-pole driving magnetic ring 51 is as follows: multiple outer arc-shaped magnetic blocks of the same size are arranged in a ring to form an outer circular ring, and multiple inner arc-shaped magnetic blocks of the same size are arranged in a ring to form an inner circular ring. The inner and outer circular rings are formed together. All outer arc-shaped magnetic blocks correspond one-to-one with inner arc-shaped magnetic blocks. The magnetic poles of two adjacent inner arc-shaped magnetic blocks are opposite, and the magnetic poles of two adjacent outer arc-shaped magnetic blocks are opposite. The inner and outer corresponding inner arc-shaped magnetic blocks and outer arc-shaped magnetic blocks are... The magnetic poles of the blocks are opposite; the second multi-stage driving magnetic ring 52 is composed of multiple arc-shaped magnetic pieces arranged in a ring-like partition. The arc-shaped magnetic pieces are inserted into the arc-shaped grooves formed between two adjacent vertical protrusion positioning parts 53. The inner sidewall of the arc-shaped magnetic piece is in close contact with the outer sidewall of the outer rotor core 50, and the outer sidewall of the arc-shaped magnetic piece is in close contact with the inner sidewall of the annular mounting groove 1311. The inner and outer magnetic poles of the arc-shaped magnetic pieces are opposite, and the inner side of the arc-shaped magnetic piece is magnetically opposite to the corresponding outer arc-shaped magnetic block of the first multi-stage driving magnetic ring 51. One inner arc-shaped magnetic block and one outer arc-shaped magnetic block of the first multi-stage driving magnetic ring 51 form a magnetic pole part. The number of all arc-shaped magnetic pieces is the same as the number of magnetic pole parts of the first multi-stage driving magnetic ring 51. All arc-shaped magnetic pieces correspond one-to-one with all magnetic pole parts, and the curvature of all arc-shaped magnetic pieces is basically the same as the curvature of all magnetic pole parts of the first multi-stage driving magnetic ring 51. It achieves magnetic field change by energizing the coils on the inner stator assembly 70 and the outer stator assembly 200, thereby driving the rotating shaft 10 to rotate. This dual drive increases torque and improves power, resulting in good performance.

[0093] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

1. A double synchronous drive high-speed motor, comprising a rotating shaft (10) and a shell (20), a top liquid cooling support block (30) is fixed in the top of the shell (20), an upper mounting plate (40) is fixed on the top surface of the top liquid cooling support block (30), a heat-conducting connecting sleeve body (60) is in the top liquid cooling support block (30), a downward extending extension sleeve body (61) is formed in the bottom surface of the middle part of the heat-conducting connecting sleeve body (60), the top of the extension sleeve body (61) is fixed in the middle part of the top liquid cooling support block (30), the lower part of the extension sleeve body (61) extends out of the bottom surface of the top liquid cooling support block (30), the rotating shaft (10) is inserted into the middle through hole of the heat-conducting connecting sleeve body (60) and the middle through hole of the extension sleeve body (61), the top end output end of the rotating shaft (10) extends out of the top surface of the middle through hole of the upper mounting plate (40), an outer rotor core (50) is mounted on the lower part of the outer lateral wall of the rotating shaft (10), characterized in that: The inner side wall of the outer rotor core (50) is fixed with a first multi-pole driving magnetic ring (51), the outer side wall of the outer rotor core (50) is fixed with a second multi-pole driving magnetic ring (52), the outer side wall of the extension sleeve (61) is fixed with an inner stator assembly (70), the inner stator assembly (70) corresponds to the first multi-pole driving magnetic ring (51), the lower inner side wall of the shell (20) is fixed with an outer stator assembly (200), and the outer stator assembly (200) corresponds to the second multi-pole driving magnetic ring (52); The middle part of the top surface of the top liquid cooling support block (30) is formed with a downwardly extending middle groove (31), the middle part of the bottom surface of the top liquid cooling support block (30) is formed with a downwardly extending protruding connecting part (32), the middle part of the bottom surface of the middle groove (31) is formed with a downwardly extending stepped through hole (310), and the bottom end of the stepped through hole (310) protrudes from the middle part of the bottom surface of the protruding connecting part (32); The stepped through hole (310) comprises an upper large-diameter hole section, a middle threaded hole section and a bottom small-diameter hole section, the lower part of the heat-conducting connecting sleeve (60) is inserted into the upper large-diameter hole section of the stepped through hole (310), the edge part of the bottom surface of the heat-conducting connecting sleeve (60) is pressed against the bottom surface of the upper large-diameter hole section of the stepped through hole (310), the upper part of the extension sleeve (61) is a stepped sleeve part, the stepped sleeve part comprises an upper large-diameter threaded part (611) with a gradually decreasing outer diameter from top to bottom, a middle connecting sleeve part (612) and a bottom connecting sleeve part (613), the upper large-diameter threaded part (611) is screwed with the middle threaded hole section of the stepped through hole (310), and the outer wall surface of the middle connecting sleeve part (612) is tightly attached to the inner side wall of the bottom small-diameter hole section of the stepped through hole (310); The middle groove (31) is communicated with and opposite to an annular groove (41) formed in the middle part of the bottom surface of the upper mounting plate (40), and the heat-conducting connecting sleeve (60) is inserted into the middle groove (31) and the annular groove (41); The bottom surface of the bottom plate of the shell (20) is fixed with a lower shell (90), the edge part of the top surface of the lower shell (90) is formed with a downwardly extending arc-shaped liquid guiding through groove (91), the edge part of the bottom surface of the bottom plate of the lower shell (90) is formed with an upwardly extending threaded hole, the threaded hole is communicated with the arc-shaped liquid guiding through groove (91), and a water inlet connecting head (92) is screwed into the threaded hole and communicated with the threaded hole; The edge bottom surface of the shell (20) is formed with an upward extending hole (24) extending upward, the upward extending hole (24) is communicated with the outer thread flow-through groove (25) formed on the outer side wall of the shell (20), the upward extending hole (24) is communicated with the arc-shaped liquid guide through groove (91), the outer sleeve body (26) is installed on the outer side wall of the shell (20), the inner side wall of the outer sleeve body (26) is tightly attached to the outer side wall of the shell (20), the edge top surface of the shell (20) is formed with a downward extending through hole (27), the lower end of the downward extending through hole (27) is communicated with the upper part of the outer thread flow-through groove (25), the top end of the downward extending through hole (27) is communicated with the bottom end of the liquid inlet through hole (301) formed on the edge bottom surface of the top liquid cooling support block (30), the top part of the liquid inlet through hole (301) is communicated with the side liquid inlet hole (311) formed on the inner side wall of the middle groove (31), a plurality of arc-shaped through grooves (312) are formed on the bottom surface of the middle groove (31), the arc-shaped through grooves (312) are communicated with the liquid cooling circulating sleeve (80); The inner side wall of the middle groove (31) is formed with a side liquid outlet hole (313), the edge bottom surface of the top liquid cooling support block (30) is formed with a vertical screw hole communicated with the side liquid outlet hole (313), the vertical screw hole is screwed with a liquid outlet connector (314); The inner stator assembly (70) comprises an inner stator and a coil wound on the inner stator, the inner stator comprises a cylindrical body (100) composed of a plurality of silicon steel sheets (10) stacked up and down, a plurality of outward extending winding portions (101) are formed on the outer side wall of the cylindrical body (100), a stator center through hole (102) with a polygonal cross section is formed in the middle of the cylindrical body (100); The pipe wall surface of the lower part of the stepped sleeve pipe portion of the extension sleeve body (61) is a polygonal cross section pipe wall surface, which is inserted into the positioning center through hole (102), the polygonal cross section pipe wall surface is pressed against the wall surface of the positioning center through hole (102), the edge bottom surface of the stepped sleeve pipe portion of the extension sleeve body (61) is pressed against the top surface of the cylindrical body (100); The outer wall surface of the cylindrical body (100) and the outer wall surface of the winding portion (101) are coated with a rust-proof insulating coating (1000); Except that the top surface and the bottom surface around the center through hole (102) of the cylindrical body (100) are not coated with the insulating rust-proof coating (1000), the outer wall surfaces of the remaining parts are coated with the insulating rust-proof coating (1000), the insulating rust-proof coating (1000) forms an integral set attached to the side wall surfaces of all the silicon steel sheets (10) and the wall surfaces of the topmost and bottommost silicon steel sheets (10), thereby fixing all the silicon steel sheets (10) and achieving insulation and rust prevention.

2. A dual synchronous drive high speed electric motor as claimed in claim 1, characterized in that: The middle bottom surface of the top liquid cooling support block (30) is fixed with a lower annular block (700), the bottom surface of the lower annular block (33) is fixed with a liquid cooling circulating sleeve (80), the middle through hole of the lower annular block (700) is communicated with the liquid cooling circulating sleeve (80), the liquid cooling circulating sleeve (80) is inserted into the first multi-pole driving magnetic ring (51), the inner stator assembly (70) is inserted into the liquid cooling circulating sleeve (80); The middle outer wall of the rotating shaft (10) is close to the inner wall of the extension sleeve (61), and a gap (1010) is formed between the middle outer wall of the rotating shaft (10) and the inner wall of the extension sleeve (61); The bottom end outer wall of the extension sleeve (61) is clamped on the inner wall of the insertion hole of the bottom plate of the liquid cooling circulation sleeve (80).

3. A dual synchronous drive high speed electric motor as claimed in claim 1, characterized in that: The upper part of the rotating shaft (10) is movably connected with the heat-conducting connecting sleeve (60) through two first bearings (1) stacked one above the other, and the bottom end of the rotating shaft (10) is movably connected with the bottom plate of the shell (20) through a second bearing (2).

4. A dual synchronous drive high speed electric motor as claimed in claim 1, characterized by: A plurality of cooling fins (62) are fixed on the outer wall of the heat-conducting connecting sleeve (60), the top surface of the heat-conducting connecting sleeve (60) is pressed against the top surface of the annular groove (41), the bottom surface around the middle through hole of the annular groove (41) is formed with a downward extending limiting ring sleeve, the limiting ring sleeve is inserted into the upper large diameter hole section of the top stepped through hole of the heat-conducting connecting sleeve (60); the outer ring of the two first bearings (1) is clamped and fixed on the inner wall of the upper large diameter hole section of the top stepped through hole, the top surface of the limiting ring sleeve is pressed against the outer ring top surface of the upper first bearing (1), and the bottom surface of the outer ring of the lower first bearing (1) is pressed against the bottom end surface of the upper large diameter hole section of the top stepped through hole.

5. A dual synchronous drive high speed electric motor as claimed in claim 4, characterized in that: The rotating shaft (10) comprises a central main shaft part (11), a small diameter stepped connecting shaft part (12) is formed in the middle of the top surface of the central main shaft part (11), a rotating wheel part (13) is formed on the lower outer wall of the central main shaft part (11), a limiting support sleeve (14) is inserted into the lower large diameter section of the small diameter stepped connecting shaft part (12), and the outer wall of the limiting support sleeve (14) is clamped on the inner wall of the lower small diameter hole section of the top stepped through hole; The upper small diameter shaft part of the small diameter stepped connecting shaft part (12) is inserted into the inner ring of the two first bearings (1), and the outer wall of the upper small diameter shaft part is close to the inner wall of the inner ring of the first bearing (1); A limiting sleeve (15) is fixed on the small diameter stepped connecting shaft part (12), the limiting sleeve (15) is inserted into the middle through hole of the upper mounting plate (40), the bottom surface of the limiting sleeve (15) is close to or pressed against the top surface of the inner ring of the first bearing (1); the outer wall of the limiting sleeve (15) and the middle through hole of the upper mounting plate (40) have an air inlet annular groove (150); An outer protective sleeve (131) is fixed on the outer wall of the rotating wheel part (13), an outer rotor iron core (50) is mounted on the inner wall of the outer protective sleeve (131), an air guide gap (8) is formed between the outer wall of the outer protective sleeve (131) and the outer stator assembly (200), a plurality of air inlet air guide through grooves (9) are formed on the edge of the bottom plate of the shell (20), the air inlet air guide through grooves (9) are communicated with the air guide gap (8), the air inlet air guide through grooves (9) are communicated with the main annular groove (93) formed on the edge top surface of the lower shell (90), a side air outlet pipe (94) is formed on the outer wall of the lower shell (90), and the side air outlet pipe (94) is communicated with the main annular groove (93).

6. A dual synchronous drive high speed electric motor as claimed in claim 5, characterized in that: The bottom plate middle part top surface of the shell (20) is formed with a downward extending lower installation stepped through hole (21), the lower installation stepped through hole (21) comprises a first stepped hole section, a second stepped hole section, a third stepped hole section and a fourth stepped hole section, the diameter of which is gradually reduced from top to bottom, the outer ring of the second bearing (2) is clamped and fixed on the inner side wall of the second stepped hole section, the inner side wall of the first stepped hole section is clamped with a fixing seat, the bottom surface side of the fixing seat is pressed on the bottom surface of the first stepped hole section, the lower annular permanent magnet ring (231) is fixed on the fixing seat, the bottom surface middle part of the rotating wheel part (13) is formed with a bottom annular installation groove, the upper annular permanent magnet ring (133) is clamped on the inner side wall of the bottom annular installation groove, the top surface of the upper annular permanent magnet ring (133) is pressed on the bottom surface middle part of the rotating wheel part (13), the upper annular permanent magnet ring (133) is directly above the lower annular permanent magnet ring (231), the upper annular permanent magnet ring (133) and the lower annular permanent magnet ring (231) have the same wall surface magnetic pole; The bottom part of the center main shaft part (11) is inserted into or clamped in the upper annular permanent magnet ring (133) and is inserted into the lower annular permanent magnet ring (231), the bottom surface middle part of the center main shaft part (11) is formed with a lower connecting shaft part (111), the lower connecting shaft part (111) is inserted into the inner ring of the second bearing (2), the top surface of the inner ring of the second bearing (2) is close to the bottom surface of the center main shaft part (11), the outer side wall of the lower connecting shaft part (111) is close to the inner side wall of the inner ring of the second bearing (2).

7. A dual synchronous drive high speed electric motor as claimed in claim 6, characterized in that: The side part of the rotating wheel part (13) is formed with not less than three air inlet holes (134), the air inlet holes (134) are arranged in a circular array on the rotating wheel part (13) with the center axis of the rotating shaft (10) as the center, and at least one inner side wall (135) of the air inlet hole (134) is a slope.

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