Integrated active cooling structure suitable for high-speed high-power motor magnetic bearing

Abstract

The invention relates to the technical field of electromagnetic bearing cooling, and discloses an integrated active cooling structure suitable for a high-speed high-power motor magnetic bearing, which comprises an electromagnetic bearing body, a guide ring, a plurality of pairs of cooling channels, an overturning frame and a pressing plate. Air in the electromagnetic bearing body can be discharged outwards along with high-speed rotation of the fan blades, when gas flows, the gas can move along the spiral cooling grooves, the time of direct heat exchange between the gas and the electromagnetic bearing body is longer, the cooling effect is better, at the moment, part of the gas flows through the cooling channel, and the cooling effect is better. A cooling channel is arranged in the electromagnetic bearing body, the cooling channel is attached to a shell of the electromagnetic bearing body, so that part of heat can be discharged when gas flows, and the cooling effect can be further improved through gas flowing of multiple channels inside and outside; and the cooling effect is synchronously improved through liquid cooling and air cooling modes.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnetic bearing cooling, and in particular relates to an integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors. Background Art

[0002] When a high-power motor drives the output shaft to rotate at high speed, the ordinary bearings connected to the output shaft have technical problems such as large vibration, high noise, easy wear, and oil pollution during operation, which limits the further improvement of the equipment speed and power level. Magnetic bearings use electromagnetic force to enable the rotor to achieve stable suspension without mechanical contact. Compared with traditional mechanical bearings, they have many advantages such as long life, high speed, low power, and low vibration and noise. In recent years, with the continuous development of magnetic bearing technology, especially the increasing maturity of active magnetic bearing technology, the use of magnetic bearings instead of traditional mechanical bearings has become a development trend of rotor support methods for marine machinery and equipment.

[0003] Existing electromagnetic bearings are generally cooled by air cooling, and the air duct has only one direction, which may eventually lead to uneven cooling and poor cooling effect, so that the electromagnetic bearing cannot achieve the preset effect.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] An integrated active cooling structure suitable for high-speed and high-power motor magnetic bearings comprises an electromagnetic bearing body, a guide ring, a plurality of pairs of cooling channels, a turning frame and a pressing plate.

[0007] A plurality of electromagnetic bearing stators are installed inside the electromagnetic bearing body, a spiral cooling groove is arranged between the plurality of electromagnetic bearing stators, and a motor main shaft is arranged inside the electromagnetic bearing body;

[0008] The guide ring is installed at the end of the electromagnetic bearing body, and a plurality of pairs of cooling pipes are installed on the side wall of the guide ring. The plurality of pairs of cooling pipes are plugged into the electromagnetic bearing body, and the plurality of pairs of cooling pipes are connected to the bearing cavity opened in the guide ring. The bearing cavity is filled with an appropriate amount of coolant. A rotating ring is rotatably installed on the guide ring, and a stirring shaft is installed at the end of the rotating ring, and the stirring shaft is located in the bearing cavity. A fan blade is installed on the rotating ring, and a ferrule is installed at the rotation center of the fan blade. The ferrule is mutually clamped with the keyway shaft at the end of the motor main shaft;

[0009] Several pairs of cooling channels are evenly installed on the side wall of the electromagnetic bearing body, and the outlet of each cooling channel faces the surface of the motor main shaft, the inlet direction and the outlet direction of the cooling channel are opposite, and an exhaust cover is installed on the cooling channel at the top, and the exhaust cover is in contact with the surface of the guide ring;

[0010] A sealing plug is installed on the flip frame, and the sealing plug is sealed on the through hole opened on the side wall of the guide ring, and the through hole is connected with the outlet of the discharge cover. A bearing platform is rotatably installed at the bottom of the flip frame, and the bearing platform is installed inside the bearing cavity;

[0011] The pressing plate is connected to the rotation center of the flip frame, and the pressing plate movably passes through the notch opened on the side wall of the guide ring, and a guide plate is installed at the end of the pressing plate, and the height of the coolant in the bearing cavity is lower than the bottom of the notch.

[0012] As a preferred embodiment of the present invention, a sealing plate is installed on the end face of the electromagnetic bearing body, the sealing plate is annular, the end of the sealing plate is in contact with the side wall of the guide ring, a plurality of pairs of mounting ears are installed on the side wall of the sealing plate, and the plurality of pairs of mounting ears are in contact with the side wall of the guide ring, and locking bolts are screwed between the plurality of pairs of mounting ears and the guide ring.

[0013] As a preferred embodiment of the present invention, a vertical plate is installed at the bottom of the guide ring, the cross-section of the bottom of the vertical plate is larger than the cross-section of the top, a base is installed at the bottom of the vertical plate, an angle of ninety degrees is formed between the base and the vertical plate, and several pairs of reinforcing ribs are installed between the base and the vertical plate, the several pairs of reinforcing ribs are in an inclined state, and several pairs of mounting holes are opened on the base.

[0014] As a preferred embodiment of the present invention, a through groove is opened inside the guide ring, the fan blades are arranged inside the through groove, a synchronous shaft is installed at the rotation center of the fan blades, the end of the synchronous shaft is interconnected with the rotation center of the sleeve, and the axes of the electromagnetic bearing body, guide ring, motor main shaft and sleeve are on the same straight line.

[0015] As a preferred embodiment of the present invention, several pairs of side rods are installed on the side wall of the sleeve, vertical rods are installed at both ends of the side rods, the vertical rods are connected to the side wall of the rotating ring, and a sealed bearing is clamped between the side wall of the rotating ring and the side wall of the guide ring, and several pairs of stirring blades are installed around the stirring shaft.

[0016] As a preferred embodiment of the present invention, an input channel is installed at one end of each pair of cooling channels, a filter screen is installed on the end face of the input channel, and a discharge channel is installed at the other end of each pair of cooling channels. A synchronous bracket is sleeved on the discharge channel and several pairs of cooling channels, and a locking screw is screwed between the synchronous bracket and each cooling channel.

[0017] As a preferred embodiment of the present invention, an inclined plate is installed on the back of the exhaust hood, the bottom of the inclined plate is connected to the surface of the cooling channel, the inner wall of the exhaust hood is provided with a guide inclined surface, and the exhaust hood is connected to the internal chamber of the cooling channel.

[0018] As a preferred embodiment of the present invention, several pairs of support plates are installed at the bottom of the support platform, and the several pairs of support plates are welded to the inner wall of the support cavity. Positioning seats are installed at both ends of the support platform, and a rotating shaft is installed inside the positioning seat so as to be movable and penetrated, and the rotating shaft is interconnected with the rotation center of the flip frame.

[0019] As a preferred embodiment of the present invention, a connecting rod is installed on the rotating shaft, the end of the connecting rod is interconnected with the surface of the pressure plate, a torsion spring is sleeved on the rotating shaft, one end of the torsion spring is clamped on the connecting rod, and the other end of the torsion spring is clamped on the side wall of the positioning seat, and a plurality of pairs of blocking plates are opened on the bearing cavity.

[0020] As a preferred embodiment of the present invention, a top cover is installed at the bottom of the notch, a top plate is movably connected to the top cover, a spring is clamped between the top plate and the top cover, and the bottom of the top plate fits with the bottom of the pressure plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] When the electromagnetic bearing body of the present invention is working, the motor main shaft drives the fan blades to rotate through the keyway shaft. As the fan blades rotate at high speed, the air inside the electromagnetic bearing body can be discharged outward. When the gas flows, the gas can move along the spiral cooling groove, so that the direct heat exchange time with the electromagnetic bearing body is longer and the cooling effect is better. At this time, a part of the gas also flows through the cooling channel, and the cooling channel is in contact with the electromagnetic bearing body shell, so when the gas flows, it can also carry a part of the heat to be discharged. The cooling effect can be further improved by the gas flow through multiple internal and external channels, and a cooling pipe filled with coolant is provided in the electromagnetic bearing body. The cooling effect is simultaneously improved by liquid cooling and air cooling. The fan blades drive the rotating ring to rotate, and the rotating ring can drive the stirring shaft to rotate, so that the coolant can be fully mixed, further improving the cooling effect.

[0023] When the fan blade of the present invention rotates at high speed, the airflow discharged at this time is discharged outward through the fan blade. According to Bernoulli's law, when the airflow flows at high speed, the pressure at the gas will become smaller, and then the atmospheric pressure will push the entire guide plate to move toward the center, and then the guide plate and the pressure plate will rotate downward at this time. At this time, the gap can be opened, and when the pressure plate moves downward, it drives the flip frame to rotate, and separates the sealing plug and the through hole. Therefore, at this time, the through hole, the gap and the bearing cavity form a cooling passage, so at this time, a part of the gas can enter the cooling channel from the gap, the bearing cavity and the through hole, and the bearing cavity is provided with a coolant. At this time, when the gas flows from the top of the coolant, it can take away a part of the heat of the coolant, so that the temperature of the coolant will not rise so fast, further improving the cooling effect. When the electromagnetic bearing body is not working, the gap and the through hole are blocked at this time, and then the coolant will not volatilize, which has the purpose of reducing volatilization.

[0024] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the attached picture:

[0026] Figure 1 A three-dimensional schematic diagram of an integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors;

[0027] Figure 2 A schematic diagram of the back structure of an integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors;

[0028] Figure 3 A partial cross-section of an integrated active cooling structure suitable for high-speed and high-power motor magnetic bearings Figure 1 ;

[0029] Figure 4 A partial cross-section of an integrated active cooling structure suitable for high-speed and high-power motor magnetic bearings Figure 2 ;

[0030] Figure 5 An integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 A schematic diagram of air-cooled gas flow in an integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors;

[0032] Figure 7 A schematic diagram of the assembly structure of a guide ring and an electromagnetic bearing body of an integrated active cooling structure suitable for high-speed and high-power motor magnetic bearings;

[0033] Figure 8 A partial cross-section of an integrated active cooling structure suitable for high-speed and high-power motor magnetic bearings Figure 3 ;

[0034] Fig. 9 An integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors Figure 8 Enlarged view of point B in the middle.

[0035] In the figure:

[0036] 1. electromagnetic bearing body; 11. electromagnetic bearing stator; 111. spiral cooling groove; 12. sealing plate; 121. mounting ear;

[0037] 2. Guide ring; 21. Vertical plate; 211. Base; 212. Reinforcement rib; 22. Rotating ring; 221. Through slot; 222. Vertical rod; 223. Side rod; 224. Card sleeve; 225. Stirring shaft; 226. Stirring blade; 227. Fan blade; 228. Synchronous shaft; 23. Cooling pipe; 231. Bearing cavity;

[0038] 3. Motor spindle; 31. Keyway shaft;

[0039] 4. Cooling channel; 41. Input channel; 411. Filter; 42. Discharge channel; 43. Synchronous bracket; 431. Locking screw; 44. Discharge cover; 441. Inclined plate; 442. Guide slope;

[0040] 5. Turning frame; 51. Sealing plug; 511. Through hole; 52. Carrying platform; 521. Support plate; 522. Positioning seat; 523. Rotating shaft; 53. Blocking plate;

[0041] 6. Pressing plate; 61. Connecting rod; 611. Torsion spring; 62. Guide plate; 63. Top cover; 631. Top plate; 632. Notch. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0043] Embodiment 1:

[0044] like Figures 1 to 9 As shown, an integrated active cooling structure suitable for high-speed and high-power motor magnetic bearings includes an electromagnetic bearing body 1, a guide ring 2, a plurality of pairs of cooling channels 4, a turning frame 5 and a pressure plate 6.

[0045] A plurality of electromagnetic bearing stators 11 are installed inside the electromagnetic bearing body 1, a spiral cooling groove 111 is arranged between the plurality of electromagnetic bearing stators 11, and a motor main shaft 3 is arranged inside the electromagnetic bearing body 1;

[0046] The guide ring 2 is installed at the end of the electromagnetic bearing body 1, and a plurality of pairs of cooling pipes 23 are installed on the side wall of the guide ring 2. The plurality of pairs of cooling pipes 23 are plugged into the electromagnetic bearing body 1, and the plurality of pairs of cooling pipes 23 are connected to the bearing cavity 231 opened in the guide ring 2. The bearing cavity 231 is filled with an appropriate amount of coolant. A rotating ring 22 is rotatably installed on the guide ring 2, and a stirring shaft 225 is installed at the end of the rotating ring 22, and the stirring shaft 225 is located in the bearing cavity 231. A fan blade 227 is installed on the rotating ring 22, and a ferrule 224 is installed at the rotation center of the fan blade 227. The ferrule 224 and the keyway shaft 31 at the end of the motor main shaft 3 are mutually clamped;

[0047] A plurality of pairs of cooling channels 4 are evenly installed on the side wall of the electromagnetic bearing body 1, and the outlet of each cooling channel 4 faces the surface of the motor spindle 3, the inlet direction of the cooling channel 4 is opposite to the outlet direction, and an exhaust cover 44 is installed on the cooling channel 4 at the top, and the exhaust cover 44 is in contact with the surface of the guide ring 2;

[0048] When the electromagnetic bearing body 1 is working, the motor main shaft 3 drives the fan blades 227 to rotate through the keyway shaft 31. As the fan blades 227 rotate at high speed, the air inside the electromagnetic bearing body 1 can be discharged outward, and when the gas flows, the gas can move along the spiral cooling groove 111, so that the direct heat exchange time with the electromagnetic bearing body 1 is longer and the cooling effect is better. At this time, a part of the gas flows through the cooling channel 4, and the cooling channel 4 is in contact with the outer shell of the electromagnetic bearing body 1, so when the gas flows, it can also carry a part of the heat to be discharged. The cooling effect can be further improved through the flow of gas through multiple channels inside and outside, and a cooling pipe 23 filled with coolant is provided in the electromagnetic bearing body 1, and the cooling effect is simultaneously improved by liquid cooling and air cooling. The fan blades 227 drive the rotating ring 22 to rotate, and the rotating ring 22 can drive the stirring shaft 225 to rotate, so that the coolant can be fully mixed, further improving the cooling effect.

[0049] A sealing plug 51 is installed on the turning frame 5, and the sealing plug 51 blocks the through hole 511 opened on the side wall of the guide ring 2. The through hole 511 is connected to the outlet of the discharge cover 44. A bearing platform 52 is rotatably installed at the bottom of the turning frame 5, and the bearing platform 52 is installed inside the bearing cavity 231.

[0050] The pressing plate 6 is connected to the rotation center of the flip frame 5, and the pressing plate 6 is movable through the notch 632 opened on the side wall of the guide ring 2, and a guide plate 62 is installed at the end of the pressing plate 6, and the height of the coolant inside the bearing cavity 231 is lower than the bottom of the notch 632.

[0051] When the fan blade 227 rotates at high speed, the airflow discharged at this time is discharged outward through the fan blade 227. According to Bernoulli's law, when the airflow flows at high speed, the pressure at the gas will become smaller, and then the atmospheric pressure will push the entire guide plate 62 to move toward the center, and then the guide plate 62 and the pressure plate 6 rotate downward at this time. At this time, the gap 632 can be opened, and when the pressure plate 6 moves downward, it drives the flip frame 5 to rotate, and separates the sealing plug 51 and the through hole 511. Therefore, at this time, the through hole 511, the gap 632 and the bearing cavity 231 form a cooling passage, so at this time, part of the gas can enter the cooling channel from the gap 632, the bearing cavity 231 and the through hole 511, and the bearing cavity 231 is provided with a coolant. At this time, when the gas flows from the top of the coolant, it can take away part of the heat of the coolant, so that the temperature of the coolant will not rise so fast, further improving the cooling effect. When the electromagnetic bearing body 1 is not working, the gap 632 and the through hole 511 are blocked at this time, and then the coolant will not volatilize, which has the purpose of reducing volatilization.

[0052] like Figures 1 to 9 As shown, in a specific embodiment, a sealing plate 12 is installed on the end face of the electromagnetic bearing body 1, and the sealing plate 12 is annular. The end of the sealing plate 12 is in contact with the side wall of the guide ring 2, and a plurality of pairs of mounting ears 121 are installed on the side wall of the sealing plate 12, and the plurality of pairs of mounting ears 121 are in contact with the side wall of the guide ring 2. Locking bolts are screwed between the plurality of pairs of mounting ears 121 and the guide ring 2, and the sealing plate 12 and the mounting ears 121 mainly serve the purpose of connecting the electromagnetic bearing body 1 and the guide ring 2.

[0053] like Figures 1 to 9 As shown, further, a vertical plate 21 is installed at the bottom of the guide ring 2, the cross section of the bottom of the vertical plate 21 is larger than the cross section of the top, a base 211 is installed at the bottom of the vertical plate 21, a ninety-degree angle is formed between the base 211 and the vertical plate 21, and a plurality of pairs of reinforcing ribs 212 are installed between the base 211 and the vertical plate 21, the plurality of pairs of reinforcing ribs 212 are in an inclined state, and a plurality of pairs of mounting holes are provided on the base 211. The above structure can ensure that the guide ring 2 can be stably installed on the support frame, and ensure the stability of the electromagnetic bearing.

[0054] Embodiment 2:

[0055] The difference between the above embodiment and this embodiment is that: Figures 1 to 9As shown, a through slot 221 is provided inside the guide ring 2, and a fan blade 227 is arranged inside the through slot 221. A synchronous shaft 228 is installed at the rotation center of the fan blade 227, and the end of the synchronous shaft 228 is connected to the rotation center of the ferrule 224. The axes of the electromagnetic bearing body 1, the guide ring 2, the motor main shaft 3 and the ferrule 224 are on the same straight line. A plurality of pairs of side rods 223 are installed on the side wall of the ferrule 224, and vertical rods 222 are installed at both ends of the side rods 223. The vertical rods 222 are connected to the side wall of the rotating ring 22, and a sealed bearing is clamped between the side wall of the rotating ring 22 and the side wall of the guide ring 2, and a plurality of pairs of stirring blades 226 are installed around the stirring shaft 225. When the ferrule 224 rotates, the ferrule 224 drives the side rod 223 to rotate, and the side rod 223 drives the vertical rod 222 to rotate. At this time, the vertical rod 222 drives the rotating ring 22 to rotate synchronously. The stirring shaft 225 on the rotating ring 22 rotates in the bearing cavity 231. The moving stirring blades 226 can stir the internal coolant to ensure that the coolant can be fully mixed, thereby better exchanging heat with the electromagnetic bearing body 1 and achieving a better cooling effect.

[0056] like Figures 1 to 9 As shown, further, a plurality of pairs of support plates 521 are installed at the bottom of the bearing platform 52, and the plurality of pairs of support plates 521 are welded in the inner wall of the bearing cavity 231. Positioning seats 522 are installed at both ends of the bearing platform 52. A rotating shaft 523 is installed in the positioning seat 522, and the rotating shaft 523 is connected to the rotation center of the flip frame 5. A connecting rod 61 is installed on the rotating shaft 523, and the end of the connecting rod 61 is connected to the surface of the pressing plate 6. A torsion spring 611 is sleeved on the rotating shaft 523, and one end of the torsion spring 611 is clamped on the connecting rod 61, and the other end of the torsion spring 611 is clamped on the side wall of the positioning seat 522. A plurality of pairs of blocking plates 53 are provided on the bearing cavity 231. When the guide plate 62 and the pressing plate 6 rotate downward, the connecting rod 61 on the pressing plate 6 can rotate on the rotating shaft 523, and the torsion spring 611 is twisted at this time, and the torsion spring 611 is convenient for the later reset operation. When the pressure plate 6 moves, the pressure plate 6 slides on the notch 632 and finally opens the notch 632. When the pressure plate 6 moves downward, the pressure plate 6 can drive the flip frame 5 to rotate through the rotating shaft 523. At this time, the sealing plug 51 and the through hole 511 on the flip frame 5 are separated, so the through hole 511, the notch 632 and the bearing cavity 231 form a cooling passage. Therefore, at this time, part of the gas can enter the cooling channel from the notch 632, the bearing cavity 231 and the through hole 511, and the bearing cavity 231 is provided with coolant. At this time, when the gas flows from above the coolant, it can take away part of the heat of the coolant, so that the temperature of the coolant will not rise so quickly, further improving the cooling effect.

[0057] Embodiment 3:

[0058] The difference between the above embodiment and this embodiment is that: Figures 1 to 9 As shown, a top cover 63 is installed at the bottom of the notch 632, a top plate 631 is movably inserted on the top cover 63, a spring is clamped between the top plate 631 and the top cover 63, and the bottom of the top plate 631 fits with the bottom of the pressure plate 6. When the electromagnetic bearing body 1 is not working, the through hole 511 is blocked by the sealing plug 51, and the top cover 63 on the notch 632 can push the top plate 631 upward through the spring, the top plate 631 can block the notch 632, and the top plate 631 and the bottom of the pressure plate 6 fit together, so the bearing cavity 231 filled with coolant is a sealed space, thereby ensuring that the coolant cannot evaporate in the non-working state, thereby achieving the purpose of saving.

[0059] like Figures 1 to 9 As shown, further, an input channel 41 is installed at one end of each pair of cooling channels 4, and a filter screen 411 is installed on the end surface of the input channel 41. A discharge channel 42 is installed at the other end of each pair of cooling channels 4. The discharge channel 42 and several pairs of cooling channels 4 are sleeved with a synchronous bracket 43, and a locking screw 431 is screwed between the synchronous bracket 43 and each cooling channel 4. An inclined plate 441 is installed on the back of the discharge cover 44, and the bottom of the inclined plate 441 is connected to the surface of the cooling channel 4. A guide inclined surface 442 is provided on the inner side wall of the discharge cover 44, and the discharge cover 44 is connected to the internal chamber of the cooling channel 4. A portion of the new external gas enters the cooling channel 4 through the input channel 41, and the filter 411 on the input channel 41 filters small dust. When the gas flows in the cooling channel 4, the cooling channel 4 is connected to the outer shell of the electromagnetic bearing body 1, so that the gas can transport a portion of the heat when flowing to cool the outer shell of the electromagnetic bearing body 1, and the gas inside the cooling channel 4 finally enters the exhaust position of the fan blade 227 through the exhaust channel 42, and finally the gas is completely discharged.

[0060] The implementation principle of an integrated active cooling structure suitable for high-speed and high-power motor magnetic bearings in this embodiment is as follows:

[0061] When the device is in use, the operator can insert the motor spindle 3 into the inner wall of the electromagnetic bearing body 1 , and insert the keyway shaft 31 on the motor spindle 3 into the interior of the ferrule 224 .

[0062] When the motor spindle 3 starts to start, the high-speed motor spindle 3 can drive the keyway shaft 31 to rotate, and the keyway shaft 31 drives the sleeve 224 to rotate, and finally drives the fan blades 227 to rotate through the synchronous shaft 228 at the rotation center of the sleeve 224. At this time, the fan blades 227 rotate at high speed, and the fan blades 227 can draw the hot gas inside the electromagnetic bearing body 1 out.

[0063] After the gas is discharged, a part of the new external gas flows through the gaps between the electromagnetic bearing stators 11. When the gas flows on its surface, it can take away the heat on the surface of the electromagnetic bearing stator 11, thereby achieving the purpose of cooling. In addition, spiral cooling grooves 111 are provided between the electromagnetic bearing stators 11. The spiral cooling grooves 111 increase the movement time to ensure that the gas can fully contact with the electromagnetic bearing stator 11, ensure more sufficient heat exchange, and achieve better cooling effect at this time.

[0064] When the fan blade 227 draws part of the gas outward, part of the new gas from the outside enters the cooling channel 4 through the input channel 41, and the filter 411 on the input channel 41 filters small dust. When the gas flows in the cooling channel 4, the cooling channel 4 is connected to the outer shell of the electromagnetic bearing body 1, and the gas can transport part of the heat when it flows, cooling the outer shell of the electromagnetic bearing body 1. Through the flow of gas in two passages, the cooling of the inside and outside of the electromagnetic bearing body 1 is completed, and the cooling effect is stronger in the end. The gas inside the cooling channel 4 eventually enters the position where the fan blade 227 draws air through the exhaust channel 42, and finally the gas is completely discharged.

[0065] When performing the above operation, the cooling tube 23 is inserted into the electromagnetic bearing body 1, and the electromagnetic bearing body 1 can be water-cooled by the coolant in the bearing cavity 231, so that the cooling effect is better. When the ferrule 224 rotates, the ferrule 224 drives the side rod 223 to rotate, and the side rod 223 drives the vertical rod 222 to rotate. At this time, the vertical rod 222 drives the rotating ring 22 to rotate synchronously, and the stirring shaft 225 on the rotating ring 22 rotates in the bearing cavity 231. The internal coolant can be stirred by the moving stirring blades 226 to ensure that the coolant can be fully mixed, and then better heat exchange with the electromagnetic bearing body 1 is performed, so that the cooling effect is better.

[0066] When the fan blades 227 rotate at high speed, the exhausted airflow is discharged outward through the fan blades 227. According to Bernoulli's principle, when the airflow and fluid flow at high speed, the pressure at the flow point will become smaller, and then the atmospheric pressure will push the entire guide plate 62 to move toward the center, and then the guide plate 62 and the pressure plate 6 will rotate downward, and the connecting rod 61 on the pressure plate 6 can rotate on the rotating shaft 523. At this time, the torsion spring 611 is twisted, and the torsion spring 611 is used to facilitate the subsequent reset operation. When the pressure plate 6 moves, the pressure plate 6 slides on the notch 632 and finally opens the notch 632. When the pressure plate 6 moves downward, the pressure plate 6 can drive the flip frame 5 to rotate through the rotating shaft 523. At this time, the sealing plug 51 and the through hole 511 on the flip frame 5 are separated, so the through hole 511, the notch 632 and the bearing cavity 231 form a cooling passage. Therefore, at this time, part of the gas can enter the cooling channel from the notch 632, the bearing cavity 231 and the through hole 511, and the bearing cavity 231 is provided with coolant. At this time, when the gas flows from above the coolant, it can take away part of the heat of the coolant, so that the temperature of the coolant will not rise so quickly, further improving the cooling effect. When the electromagnetic bearing body 1 is not working, the through hole 511 is blocked by the sealing plug 51, and the top cover 63 on the notch 632 can push the top plate 631 upward through the spring, and the top plate 631 can block the notch 632, and the top plate 631 and the bottom of the pressure plate 6 are in contact, so the bearing cavity 231 filled with coolant is a sealed space, thereby ensuring that the coolant cannot evaporate when not working, thereby achieving the purpose of saving.

Claims

1. An integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors, characterized in that: include: An electromagnetic bearing body (1), wherein a plurality of electromagnetic bearing stators (11) are installed inside the electromagnetic bearing body (1), spiral cooling grooves (111) are arranged between the plurality of electromagnetic bearing stators (11), and a motor main shaft (3) is arranged inside the electromagnetic bearing body (1); A guide ring (2), the guide ring (2) being mounted at the end of the electromagnetic bearing body (1), a plurality of pairs of cooling pipes (23) being mounted on the side wall of the guide ring (2), the plurality of pairs of cooling pipes (23) being inserted into the electromagnetic bearing body (1), the plurality of pairs of cooling pipes (23) being interconnected with a bearing cavity (231) provided inside the guide ring (2), the bearing cavity (231) being filled with an appropriate amount of cooling liquid, a rotating ring (22) being rotatably mounted on the guide ring (2), a stirring shaft (225) being mounted at the end of the rotating ring (22), and the stirring shaft (225) being located in the bearing cavity (231), a fan blade (227) being mounted on the rotating ring (22), a ferrule (224) being mounted at the rotation center of the fan blade (227), and the ferrule (224) being mutually engaged with a keyway shaft (31) at the end of the motor main shaft (3); A plurality of pairs of cooling channels (4), wherein the plurality of pairs of cooling channels (4) are evenly mounted on the side wall of the electromagnetic bearing body (1), and the outlet of each cooling channel (4) faces the surface of the motor main shaft (3), the inlet direction and the outlet direction of the cooling channel (4) are opposite, and an exhaust cover (44) is mounted on the cooling channel (4) at the top, and the exhaust cover (44) is in contact with the surface of the guide ring (2); A turning frame (5), wherein a sealing plug (51) is installed on the turning frame (5), wherein the sealing plug (51) seals a through hole (511) provided on the side wall of the guide ring (2), wherein the through hole (511) is communicated with an outlet of the discharge cover (44), and a bearing platform (52) is rotatably installed at the bottom of the turning frame (5), and the bearing platform (52) is installed inside the bearing cavity (231); A pressure plate (6), wherein the pressure plate (6) is connected to the rotation center of the flip frame (5), and the pressure plate (6) is movable through the notch (632) provided on the side wall of the guide ring (2), and a guide plate (62) is installed at the end of the pressure plate (6), and the height of the coolant inside the bearing cavity (231) is lower than the bottom of the notch (632).

2. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 1 is characterized in that: A sealing plate (12) is installed on the end surface of the electromagnetic bearing body (1), the sealing plate (12) is annular, the end of the sealing plate (12) is in contact with the side wall of the guide ring (2), a plurality of pairs of mounting ears (121) are installed on the side wall of the sealing plate (12), and the plurality of pairs of mounting ears (121) are in contact with the side wall of the guide ring (2), and locking bolts are screwed between the plurality of pairs of mounting ears (121) and the guide ring (2).

3. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 1 is characterized in that: A vertical plate (21) is installed at the bottom of the guide ring (2), the cross section of the bottom of the vertical plate (21) is larger than the cross section of the top, a base (211) is installed at the bottom of the vertical plate (21), a ninety-degree angle is formed between the base (211) and the vertical plate (21), and a plurality of pairs of reinforcing ribs (212) are installed between the base (211) and the vertical plate (21), the plurality of pairs of reinforcing ribs (212) are in an inclined state, and a plurality of pairs of mounting holes are provided on the base (211).

4. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 1 is characterized in that: A through slot (221) is provided inside the guide ring (2), the fan blade (227) is arranged inside the through slot (221), a synchronous shaft (228) is installed at the rotation center of the fan blade (227), the end of the synchronous shaft (228) is connected to the rotation center of the sleeve (224), and the axes of the electromagnetic bearing body (1), the guide ring (2), the motor main shaft (3) and the sleeve (224) are on the same straight line.

5. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 1 is characterized in that: A plurality of pairs of side rods (223) are installed on the side wall of the sleeve (224), and vertical rods (222) are installed at both ends of the side rods (223). The vertical rods (222) are connected to the side wall of the rotating ring (22), and a sealed bearing is clamped between the side wall of the rotating ring (22) and the side wall of the guide ring (2). A plurality of pairs of stirring blades (226) are installed around the stirring shaft (225).

6. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 1, characterized in that: An input channel (41) is installed at one end of each pair of cooling channels (4), and a filter screen (411) is installed on the end surface of the input channel (41). A discharge channel (42) is installed at the other end of each pair of cooling channels (4). A synchronous bracket (43) is sleeved on the discharge channel (42) and several pairs of cooling channels (4). A locking screw (431) is screwed between the synchronous bracket (43) and each cooling channel (4).

7. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 1, characterized in that: An inclined plate (441) is installed on the back of the exhaust hood (44), the bottom of the inclined plate (441) is interconnected with the surface of the cooling channel (4), the inner wall of the exhaust hood (44) is provided with a guide inclined surface (442), and the exhaust hood (44) is connected with the internal chamber of the cooling channel (4).

8. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 1 is characterized in that: A plurality of pairs of support plates (521) are installed at the bottom of the bearing platform (52), and the plurality of pairs of support plates (521) are welded to the inner wall of the bearing cavity (231). Positioning seats (522) are installed at both ends of the bearing platform (52), and a rotating shaft (523) is installed inside the positioning seat (522) so as to be movable and penetrated, and the rotating shaft (523) is connected to the rotation center of the turning frame (5).

9. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 8, characterized in that: A connecting rod (61) is installed on the rotating shaft (523), and the end of the connecting rod (61) is connected to the surface of the pressure plate (6). A torsion spring (611) is sleeved on the rotating shaft (523), one end of the torsion spring (611) is clamped on the connecting rod (61), and the other end of the torsion spring (611) is clamped on the side wall of the positioning seat (522), and a plurality of pairs of blocking plates (53) are opened on the bearing cavity (231).

10. The integrated active cooling structure suitable for magnetic bearings of high-speed and high-power motors according to claim 1, characterized in that: A top cover (63) is installed at the bottom of the notch (632), a top plate (631) is movably inserted on the top cover (63), a spring is clamped between the top plate (631) and the top cover (63), and the bottom of the top plate (631) is in contact with the bottom of the pressure plate (6).

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