A magnetic levitation motor axial support device and heat dissipation method thereof

Abstract

The present invention discloses an axial support device for a magnetic levitation motor and a heat dissipation method thereof, relating to the technical field of magnetic levitation motors. The device comprises: a housing, a rotor shaft disposed within the housing; a motor stator core, a radial magnetic bearing, an axial magnetic bearing, and a displacement sensor disposed within the housing and sleeved on the outside of the rotor shaft; and two sets of heat dissipation support mechanisms, each set of heat dissipation support mechanisms comprising an inner and outer transmission sleeve assembly and a cooling suction assembly. The transmission sleeve assembly comprises a sleeve body, a temperature-controlled transmission chuck disposed within the sleeve body, and an electromagnetic transmission chuck. The present invention utilizes the temperature-controlled transmission chuck and the electromagnetic transmission chuck, respectively, to trigger abnormal device temperature and power failure, thereby achieving heat dissipation and temporary support for the rotor shaft, thereby improving the device's protective performance and service life.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic levitation motors, and in particular to an axial support device for a magnetic levitation motor and a heat dissipation method thereof. Background Art

[0002] Magnetic levitation motors are widely used in blowers, vacuum pumps, refrigerant compressors and other products due to their high energy efficiency, low noise, environmental protection and maintenance-free features. They are also continuously developing and extending into other fields, and have broad market prospects.

[0003] However, in actual use, firstly, certain unexpected situations will directly lead to varying degrees of damage to the magnetic levitation motor and some other components. For example, after an unexpected power outage, the rotor will fall without the force of the magnetic field. Secondly, heat will be generated during operation, especially at abnormal temperatures. If the heat cannot be dissipated in time, the motor life will be greatly reduced or even damaged. Summary of the Invention

[0004] The purpose of the present invention is to provide an axial support device for a magnetic levitation motor and a heat dissipation method thereof. The device is equipped with a temperature-controlled transmission chuck and an electromagnetic transmission chuck, which can use the abnormal temperature and power-off state of the device as trigger points respectively to achieve heat dissipation of the device and temporary support of the rotor shaft, thereby improving the protection performance and service life of the device.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an axial support device for a magnetic levitation motor, comprising: a casing, a rotor shaft arranged inside the casing; and a motor stator core, a radial magnetic bearing, an axial magnetic bearing and a displacement sensor arranged inside the casing and sleeved on the outside of the rotor shaft, wherein the radial magnetic bearings are provided in two groups and are placed on both sides of the motor stator core, and the rotor shaft can be suspended between the motor stator core, the radial magnetic bearings, the axial magnetic bearings and the displacement sensor; and also comprising two groups of heat dissipation support mechanisms, each group of the heat dissipation support mechanisms comprising an inner and outer transmission sleeve assembly and a cooling suction assembly, wherein the transmission sleeve assembly consists of a sleeve body, a temperature-controlled transmission chuck arranged inside the sleeve body, and an electromagnetic transmission chuck; when the temperature of the device is abnormal and the temperature-controlled transmission chuck is driven to operate, the rotor shaft drives the cooling suction assembly to operate to dissipate heat; when the device loses power or fails and the electromagnetic transmission chuck is operated, it can provide a temporary support for the rotor shaft.

[0006] Preferably, the cooling suction assembly includes a fixed sleeve arranged inside the casing, and an inlet pipe and an outlet pipe connected to the fixed sleeve and symmetrically arranged at the bottom of the fixed sleeve; it also includes an eccentric sleeve, which is rotatably mounted inside the fixed sleeve and eccentrically mounted on the lower part of the fixed sleeve, wherein the inner side of the eccentric sleeve is fixed to the sleeve body where the transmission sleeve assembly is located and is jointly sleeved with it on the outer side of the rotor shaft, and a mounting block is fixed to the outer periphery of the eccentric sleeve in an annular manner; each of the mounting blocks is provided with a slide groove with an outer end opening, and a slider slidably mounted inside the slide groove, wherein a first spring is connected between one side of the slider and the inner wall of the slide groove, and a hinge plate extending outward is hinged on the other side thereof, and a connecting plate is connected between the outer end of the hinge plate and the inner wall of the fixed sleeve, so as to form a plurality of suction cavities. When the temperature-controlled transmission chuck clamps the rotor shaft, the eccentric sleeve drives the hinge plate and the connecting plate to rotate, and the plurality of suction cavities can expand and contract at the positions of the inlet pipe and the outlet pipe respectively to realize the suction process of the liquid from the inlet pipe to the outlet pipe.

[0007] Preferably, the temperature-controlled transmission chuck includes several first fixed frames fixed on one side of the sleeve, and several first clamping blocks are slidably installed inside each of the first fixed frames; and second springs are respectively arranged between the two ends of each first clamping block and the first fixed frame; and also includes a temperature sensing structure arranged between each first clamping block and the first fixed frame.

[0008] Preferably, the temperature sensing structure includes a memory alloy provided on the opposite surface of the first clamping block and the first fixing frame.

[0009] Preferably, the electromagnetic transmission chuck includes a second fixed frame arranged on the other side of the sleeve, and a plurality of second clamping blocks are arranged in the second fixed frame, wherein each of the second clamping blocks is connected to the second fixed frame at both ends with a spring sheet, and a magnetic sheet assembly is arranged on the outer side of the second clamping block opposite to the second fixed frame; it also includes a conductive ring fixed on the side of the second fixed frame away from the temperature control transmission chuck, and the conductive ring is provided with a first wire connected to the plurality of magnetic sheet assemblies in a one-to-one correspondence; the outer wall of the casing is also provided with a backup power supply, and a second wire arranged on the backup power supply, and the end of the second wire away from the backup power supply passes through the casing and the sleeve in turn to open a through hole and is provided with an electric patch, and the electric patch is placed on the side wall of the conductive ring. When the conductive ring rotates, the electric patch always keeps in contact with the conductive ring to ensure current flow.

[0010] Preferably, the magnetic sheet assembly includes an electromagnetic sheet and a magnet respectively arranged on opposite surfaces of the second fixing frame and the second clamping block and magnetically attracting and repelling each other.

[0011] Preferably, a cooling circulation structure is also provided on the casing, and the cooling circulation structure includes a refrigerator and a liquid storage tank connected at the top and bottom, wherein the liquid storage tank is fixed on the casing, and two groups of liquid inlet pipes and liquid outlet pipes are arranged on the back sides of the refrigerator and the liquid storage tank, and the end of each group of the liquid inlet pipe and liquid outlet pipe away from the liquid storage tank is respectively connected to the inlet pipe and outlet pipe where one group of cooling suction components is located.

[0012] Preferably, the axial magnetic bearing includes an extended step portion connected to the rotor shaft; and an annular seat fixed inside the casing, wherein a limiting cavity is provided in the annular seat for limiting the position of the extended step portion; and also includes a magnetic block arranged inside the limiting cavity for controlling the position of the extended step portion.

[0013] Preferably, the displacement sensor includes a mounting bracket fixed inside the casing, and the sensor body is mounted on the mounting bracket at equal distances from the inner wall of the rotor shaft.

[0014] A heat dissipation method, applied to the above-mentioned magnetic levitation motor axial support device: the heat dissipation method includes: S1; when the temperature of the device rises abnormally, the memory alloy can push the first clamping block to adaptively clamp the outer periphery of the rotor shaft according to the temperature, so as to drive the sleeve to rotate with the rotor shaft; S2; synchronously with the above process, the suction chambers at the inlet pipe and outlet pipe positions respectively expand and contract to realize the process of sucking liquid from the inlet pipe to the outlet pipe, thereby driving the internal heat of the device and realizing the cooling cycle heat dissipation process of the device.

[0015] The advantages and beneficial effects of the present invention compared to the prior art are as follows:

[0016] 1. The present invention provides an axial support device for a magnetic levitation motor. A coaxially distributed motor stator core, radial magnetic bearings, axial magnetic bearings, and displacement sensors are provided within a housing, and the rotor shaft is suspended between the motor stator core, radial magnetic bearings, axial magnetic bearings, and displacement sensors, thereby achieving contactless, high-speed rotation of the rotor shaft. The temperature-controlled transmission chuck and electromagnetic transmission chuck, respectively triggered by abnormal temperature and power failure of the device, achieve heat dissipation and temporary support of the rotor shaft, thereby improving the device's protective performance.

[0017] 2. In another embodiment of the electromagnetic transmission chuck of the present invention, when the electromagnetic transmission chuck contacts the rotor shaft, it can synchronously drive the cooling and suction assembly to operate, thereby achieving cooling when the device works for a long time and at high load. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an axial support device for a magnetic levitation motor according to an embodiment of the present invention;

[0019] Figure 2 It is a side structural schematic diagram of the present invention;

[0020] Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0021] Figure 4 It is a schematic diagram of the enlarged structure at A;

[0022] Figure 5 It is a front view structural schematic diagram of the present invention;

[0023] Figure 6 Schematic diagram of the cross-sectional structure of BB;

[0024] Figure 7 Schematic diagram of the cross-sectional structure of EE;

[0025] Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention;

[0026] Figure 9 It is a schematic diagram of the enlarged structure at B;

[0027] Figure 10 for Figure 8 Schematic diagram of a local enlarged structure;

[0028] Figure 11 for Figure 10 Schematic diagram of the local enlarged structure.

[0029] In the figure: 111, housing; 211, motor stator core; 212, radial magnetic bearing; 213, axial magnetic bearing; 2131, annular seat; 2132, limit cavity; 2133, magnetic block; 214, displacement sensor; 2141, mounting bracket; 2142, sensor body; 215, rotor shaft; 2151, extended step; 312, fixing sleeve; 313, outlet pipe; 314, eccentric sleeve; 315, mounting block; 316, slide groove; 317, slider; 318, Hinge plate; 319, connecting plate; 320, first spring; 321, liquid inlet pipe; 322, liquid outlet pipe; 323, refrigerator; 324, liquid storage tank; 325, inlet pipe; 411, sleeve; 412, first fixed frame; 413, first clamping block; 414, memory alloy; 415, second spring; 511, second fixed frame; 512, second clamping block; 513, spring piece; 514, magnetic sheet assembly; 515, backup power supply; 516, second wire; 517, conductive ring. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0031] See also Figures 1 to 11 The present invention preferably provides a technical solution: an axial support device for a magnetic levitation motor, comprising: a housing 111, a rotor shaft 215 arranged inside the housing 111; and a motor stator core 211, a radial magnetic bearing 212, an axial magnetic bearing 213 and a displacement sensor 214 arranged inside the housing 111 and sleeved on the outside of the rotor shaft 215, wherein the radial magnetic bearings 212 are provided with two groups and are placed on both sides of the motor stator core 211, and the rotor shaft 215 can be suspended on the motor stator core 211, the radial magnetic bearings 212, the axial magnetic bearings Between the bearing 213 and the displacement sensor 214; it also includes two groups of heat dissipation support mechanisms, each group of heat dissipation support mechanisms includes a transmission sleeve assembly and a cooling suction assembly arranged inside and outside, wherein the transmission sleeve assembly consists of a sleeve body 411, a temperature-controlled transmission chuck arranged on the inner side of the sleeve body 411, and an electromagnetic transmission chuck; when the temperature of the device is abnormal and the temperature-controlled transmission chuck is driven to operate, the rotor shaft 215 drives the cooling suction assembly to work to dissipate heat; when the device loses power or fails and the electromagnetic transmission chuck is operated, it can provide a temporary support for the rotor shaft 215.

[0032] The housing 111 provided in the present application is provided with a coaxially distributed motor stator core 211, a radial magnetic bearing 212, an axial magnetic bearing 213 and a displacement sensor 214, and the rotor shaft 215 can be suspended between the motor stator core 211, the radial magnetic bearing 212, the axial magnetic bearing 213 and the displacement sensor 214, so as to realize a contactless high-speed rotation process of the rotor shaft 215. Figure 1 、 Figure 2 、 Figure 3 As shown, at the same time, two sets of heat dissipation support mechanisms are also provided on the outer periphery of the rotor shaft 215, wherein a single heat dissipation support mechanism is composed of a transmission sleeve assembly and a cooling suction assembly arranged inside and outside, and the transmission sleeve assembly is composed of a sleeve body 411, a temperature control transmission chuck provided on the inner side of the sleeve body 411, and an electromagnetic transmission chuck. Here, the temperature control transmission chuck and the electromagnetic transmission chuck are placed on the outer periphery of the rotor shaft 215, and when some special circumstances occur in the device, the rotor shaft 215 is clamped to cool the rotor shaft 215 and prevent it from falling. The specific combination Figure 3 、 Figure 4 、 Figure 9As shown, when the temperature of the device rises abnormally, the temperature-controlled transmission chuck can adaptively contact the outer periphery of the rotor shaft 215 according to the temperature and rotate with the rotor shaft 215. At this time, the rotation process drives the cooling suction component to start immediately, pumping out the coolant to remove the heat inside the device, thereby realizing the heat dissipation process of the device;

[0033] When the device loses power or fails, the single-chip microcomputer in the device receives the power-off signal in real time and starts another power supply system of the device to deal with the situation where the rotor shaft 215 loses the magnetic force provided by the radial magnetic bearing 212 and the axial magnetic bearing 213 and is prone to falling. Specifically, when the other power supply system, that is, the electromagnetic transmission chuck, receives the start signal, it can quickly clamp the rotor shaft 215, limit the position of the rotor shaft 215, and play a role of temporary support;

[0034] As another embodiment of the electromagnetic transmission chuck, since the electromagnetic transmission chuck serves as the execution end of the single-chip microcomputer and the computer serves as the operation end of the single-chip microcomputer, when the electromagnetic transmission chuck is manually controlled to contact the rotor shaft 215, the cooling suction component can be driven to operate synchronously to achieve cooling when the device is working for a long time and under high load;

[0035] The temperature-controlled transmission chuck and electromagnetic transmission chuck provided in the present application can respectively use the abnormal temperature and power-off state of the device as trigger points to achieve heat dissipation of the device and temporary support of the rotor shaft 215, thereby improving the protection performance of the device. At the same time, manual control of the electromagnetic transmission chuck can further cool the device under long-term and high-load operation to ensure the working efficiency of the device.

[0036] As another embodiment of the present invention, the cooling and suction assembly includes a fixed sleeve 312 arranged inside the casing 111, and an inlet pipe 325 and an outlet pipe 313 that are connected to the fixed sleeve 312 and symmetrically arranged at the bottom of the fixed sleeve 312; it also includes an eccentric sleeve 314, which is rotatably mounted inside the fixed sleeve 312 and eccentrically mounted to the lower part of the fixed sleeve 312, wherein the inner side of the eccentric sleeve 314 is fixed to the sleeve body 411 where the transmission sleeve assembly is located and is jointly sleeved with it on the outside of the rotor shaft 215, and a mounting block 315 is annularly fixed on the outer periphery of the eccentric sleeve 314; each mounting block 315 is provided with a slide groove 316 with an outer end opening. And a slider 317 slidably installed inside the slide groove 316, wherein a first spring 320 is connected between one side of the slider 317 and the inner wall of the slide groove 316, and a hinge plate 318 extending outward is hinged on the other side thereof, and a connecting plate 319 is connected between the outer end of the hinge plate 318 and the inner wall of the fixed sleeve 312, which is used to form multiple suction cavities. When the temperature-controlled transmission chuck clamps the rotor shaft 215, the eccentric sleeve 314 drives the hinge plate 318 and the connecting plate 319 to rotate, and the multiple suction cavities can be expanded and contracted at the positions of the inlet pipe 325 and the outlet pipe 313 respectively to realize the suction process of the liquid from the inlet pipe 325 to the outlet pipe 313.

[0037] This embodiment can be found in Figure 6 、 Figure 7 As shown, the eccentric sleeve 314 and the fixed sleeve 312 are distributed inside and outside and eccentrically rotated. At the same time, the inner side of the eccentric sleeve 314 is fixed to the sleeve body 411 where the transmission sleeve assembly is located and is jointly sleeved on the outside of the rotor shaft 215. The outer periphery of the eccentric sleeve 314 is annularly fixed with a mounting block 315. Therefore, when the temperature-controlled transmission chuck and the electromagnetic transmission chuck installed on the inner side of the sleeve body 411 are clamped with the rotor shaft 215, the sleeve body 411 can drive the eccentric sleeve 314 to rotate inside the fixed sleeve 312, thereby causing the suction chambers at the positions of the inlet pipe 325 and the outlet pipe 313 to expand and contract respectively, so as to realize the suction process of the liquid from the inlet pipe 325 to the outlet pipe 313. Figure 6 , here the mounting blocks 315 are preferably three, so there are three suction chambers, because the hinged plate 318 provided in the chute 316 can be telescopically moved in the chute 316 provided in the mounting block 315 through the slider 317, and is reset by the first spring 320, so that the eccentric sleeve 314 is Figure 7 During the clockwise movement shown, when the mounting block 315 rotates clockwise toward the liquid outlet pipe 322, the distance between the eccentric sleeve 314 and the fixed sleeve 312 gradually decreases, causing the slider 317 to gradually move inward toward the rotor shaft 215. The first spring 320 is gradually compressed, and the suction cavity near the outlet pipe 313 is compressed, so that the coolant in the suction cavity is pushed into the outlet pipe 313 for discharge.

[0038] In parallel with this process: Figure 7 As shown, the mounting block 315 moves clockwise toward the inlet pipe 325. As the distance between the eccentric sleeve 314 and the fixed sleeve 312 gradually increases, the slider 317 can gradually return to its original position and move outwards through the action of the first spring 320. Then, the suction cavity near the inlet pipe 325 expands, so that the coolant can be sucked into the suction cavity through the first spring 320.

[0039] Furthermore, the temperature-controlled transmission chuck includes several first fixed frames 412 fixed on one side of the sleeve 411, and several first clamping blocks 413 are slidably installed inside each first fixed frame 412; and second springs 415 are respectively arranged between the two ends of each first clamping block 413 and the first fixed frame 412; it also includes a temperature-sensing structure arranged between each first clamping block 413 and the first fixed frame 412; further, the temperature-sensing structure includes a memory alloy 414 arranged on the opposite side of the first clamping block 413 and the first fixed frame 412.

[0040] Here, the first fixing frame 412 where the single temperature control transmission chuck is located is preferably two, combined with Figure 9 、 Figure 10 、 Figure 11As shown, because each first clamping block 413 has a second spring 415 connected between its two ends and the first fixing frame 412, and a memory alloy 414 is connected to its surface opposite the first fixing frame 412, when the memory alloy 414 senses the abnormal temperature inside the device, it adaptably lengthens, pushing the first clamping block 413 toward the rotor shaft 215 and clamping the surface of the rotor shaft 215, compressing the second spring 415. At this time, the first clamping block 413 drives the sleeve 411 to rotate with the rotor shaft 215. When the device temperature drops, the memory alloy 414 adaptably shortens, causing the first clamping block 413 to separate from the rotor shaft 215.

[0041] It is worth explaining the principle of the memory alloy 414: the memory alloy 414 is a material composed of two or more metal elements that has a shape memory effect through thermoelasticity, martensitic phase transformation and its inversion. Taking the spring made of memory alloy 414 as an example, if this spring is placed in hot water, the length of the spring will immediately extend, and if it is placed in cold water, it will immediately return to its original shape. Therefore, when the memory alloy 414 is deformed according to the temperature, the clamping and disengagement process of the first clamping block 413 and the rotor shaft 215 can be realized. Note that the deformation length of the memory alloy 414 here has been adaptively adjusted according to the gap between the first clamping block 413 and the rotor shaft 215, that is, when the temperature of the device does not exceed the preset temperature, that is, when the abnormal temperature is not reached, the memory alloy 414 will deform, but the deformation amount fails to enable the first clamping block 413 to clamp the rotor shaft 215.

[0042] Furthermore, the electromagnetic transmission chuck includes a second fixed frame 511 provided on the other side of the sleeve 411, and a plurality of second clamping blocks 512 are provided in the second fixed frame 511, wherein each second clamping block 512 has a spring 513 connected between the two ends of the second clamping block 512 and the second fixed frame 511, and a magnetic sheet assembly 514 is provided on the outer side of the second clamping block 512 opposite to the second fixed frame 511; and further includes a conductive ring 517 fixed on the side of the second fixed frame 511 away from the temperature control transmission chuck, and a first wire is provided on the conductive ring 517 and connected to the plurality of magnetic sheet assemblies 514 in a one-to-one correspondence; The outer wall of the shell 111 is also provided with a backup power supply 515 and a second wire 516 arranged on the backup power supply 515, and the end of the second wire 516 away from the backup power supply 515 passes through the casing 111 and the through holes opened on the sleeve 411 in sequence and is provided with an electric patch. The electric patch is placed on the side wall of the conductive ring 517. When the conductive ring 517 rotates, the electric patch and the conductive ring 517 always maintain contact to ensure the flow of current; further, the magnetic sheet assembly 514 includes an electromagnetic sheet and a magnet respectively arranged on the opposite surfaces of the second fixed frame 511 and the second clamping block 512 and magnetically attracted and repelled from each other.

[0043] Here, the backup power supply 515 is an existing mature technology and is controlled by a single chip microcomputer. Figure 4 、 Figure 9 、 Figure 10 、 Figure 11 As shown, several second clamping blocks 512 are arranged inside the second fixed frame 511, and a spring 513 is respectively connected between the two ends of each second clamping block 512 and the second fixed frame 511. The opposite surface of the second clamping block 512 and the second fixed frame 511 are respectively provided with an electromagnetic plate and a magnet. At the same time, several first wires on the conductive ring 517 are connected to the corresponding electromagnetic plate at one end, and connected to the backup power supply 515 at the other end through the second wire 516. Therefore, by controlling the backup power supply 515, the power-on and power-off process of the electromagnetic plate can be realized.

[0044] As another embodiment of the present invention, a cooling circulation structure is further provided on the casing 111, and the cooling circulation structure includes a refrigerator 323 and a liquid storage tank 324 connected at the upper and lower parts, wherein the liquid storage tank 324 is fixed on the casing 111, and two groups of liquid inlet pipes 321 and liquid outlet pipes 322 are arranged on the opposite sides of the refrigerator 323 and the liquid storage tank 324, and the end of each group of liquid inlet pipes 321 and liquid outlet pipes 322 away from the liquid storage tank 324 is respectively connected to the inlet pipe 325 and the outlet pipe 313 where one group of cooling suction components is located.

[0045] like Figure 1 、 Figure 6 、 Figure 7 As shown, the two groups of liquid inlet pipes 321 and liquid outlet pipes 322 arranged on the back sides of the refrigerator 323 and the liquid storage tank 324 connected up and down are respectively connected to the inlet pipe 325 and the outlet pipe 313 where the two groups of cooling suction components are located, thereby realizing the process of the coolant being sucked from the inlet pipe 325 and discharged from the outlet pipe 313. At the same time, the discharged coolant returns to the liquid storage tank 324 and the refrigerator 323 in turn to be re-cooled to ensure the cooling effect.

[0046] Furthermore, the axial magnetic bearing 213 includes an extended step portion 2151 connected to the rotor shaft 215; and an annular seat 2131 fixed inside the casing 111, and a limiting cavity 2132 is provided in the annular seat 2131 for limiting the position of the extended step portion 2151; and also includes a magnetic block 2133 arranged inside the limiting cavity 2132 for controlling the position of the extended step portion 2151; further, the displacement sensor 214 includes a mounting bracket 2141 fixed inside the casing 111, and the mounting bracket 2141 is equidistantly mounted with a sensor body 2142 near the inner wall of the rotor shaft 215.

[0047] The principle of making the rotor shaft 215 stably suspended is as follows: Figure 1 、 Figure 3As shown, the rotor shaft 215 is suspended under the action of magnetic force. When the rotor is disturbed, the sensor body 2142 where the displacement sensor 214 is located detects the displacement of the rotor shaft 215 from the reference point and sends it to the controller. The microprocessor of the controller calculates the control signal based on the detected offset signal, and then the power amplifier converts the control signal into a control current, which is input into the radial magnetic bearing 212 and the axial magnetic bearing 213, generating a controllable electromagnetic force in the radial magnetic bearing 212 and the axial magnetic bearing 213 to maintain the suspended position of the rotor shaft 215 unchanged.

[0048] As another embodiment of the present invention, a heat dissipation method is applied to the aforementioned magnetic levitation motor axial support device:

[0049] Heat dissipation methods include:

[0050] S1; when the temperature of the device rises abnormally, the memory alloy 414 may push the first clamping block 413 and the outer periphery of the rotor shaft 215 to adaptively clamp according to the temperature, so as to drive the sleeve 411 to rotate with the rotor shaft 215;

[0051] S2; synchronously with the above process is: the inlet pipe 325, the outlet pipe 313 position of the suction cavity are expanded and contracted movement, to achieve the liquid from the inlet pipe 325 to the outlet pipe 313 of the suction process, then drive the internal heat device, to achieve the cooling cycle heat dissipation process of the device.

[0052] The above-described embodiments merely represent several embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A magnetic levitation motor axial support device, characterized in that: include: a casing, a rotor shaft disposed inside the casing; and a motor stator core, a radial magnetic bearing, an axial magnetic bearing, and a displacement sensor, which are arranged inside the housing and sleeved on the outside of the rotor shaft, wherein two groups of radial magnetic bearings are provided and are placed on both sides of the motor stator core, and the rotor shaft can be suspended between the motor stator core, the radial magnetic bearings, the axial magnetic bearings, and the displacement sensor; It also includes two sets of heat dissipation support mechanisms, each set of the heat dissipation support mechanisms includes an inner and outer transmission sleeve assembly and a cooling suction assembly, wherein the transmission sleeve assembly is composed of a sleeve body, a temperature-controlled transmission chuck arranged inside the sleeve body, and an electromagnetic transmission chuck; When the device temperature is abnormal and the temperature-controlled transmission chuck is driven to operate, the rotor shaft drives the cooling suction component to operate to dissipate heat; when the device loses power or fails and the electromagnetic transmission chuck is operated, it can provide a temporary support for the rotor shaft; The cooling and suction assembly includes a fixed sleeve arranged inside the housing, and an inlet pipe and an outlet pipe connected to the fixed sleeve and symmetrically arranged at the bottom of the fixed sleeve; It also includes an eccentric sleeve, which is rotatably mounted inside the fixed sleeve and eccentrically mounted to the lower part of the fixed sleeve, wherein the inner side of the eccentric sleeve is fixed to the sleeve body where the transmission sleeve assembly is located and is jointly sleeved with the transmission sleeve assembly on the outer side of the rotor shaft, and a mounting block is annularly fixed to the outer periphery of the eccentric sleeve; Each mounting block is provided with a slide groove with an outer end opening, and a slider slidably mounted inside the slide groove, wherein a first spring is connected between one side of the slider and the inner wall of the slide groove, and a hinge plate extending outward is hinged on the other side thereof, and a connecting plate is connected between the outer end of the hinge plate and the inner wall of the fixed sleeve to form a plurality of suction cavities. When the temperature-controlled transmission chuck clamps the rotor shaft, the eccentric sleeve drives the hinge plate and the connecting plate to rotate, and the plurality of suction cavities can be expanded and contracted at the positions of the inlet pipe and the outlet pipe respectively to realize the suction process of the liquid from the inlet pipe to the outlet pipe.

2. The axial support device for a magnetic levitation motor according to claim 1, characterized in that: The temperature control transmission chuck includes a plurality of first fixing frames fixed to one side of the sleeve body, and a plurality of first clamping blocks are slidably installed inside each of the first fixing frames; and second springs respectively arranged between the two ends of each of the first clamping blocks and the first fixing frame; It also includes a temperature sensing structure arranged between each of the first clamping blocks and the first fixing frame.

3. The axial support device for a magnetic levitation motor according to claim 2, characterized in that: The temperature sensing structure includes a memory alloy arranged on the opposite surface of the first clamping block and the first fixing frame.

4. The axial support device for a magnetic levitation motor according to claim 1, characterized in that: The electromagnetic transmission chuck includes a second fixed frame provided on the other side of the sleeve body, wherein a plurality of second clamping blocks are provided in the second fixed frame, wherein each second clamping block has an elastic piece connected to the second fixed frame at both ends, and a magnetic sheet assembly is provided on the outer side of the second clamping block opposite to the second fixed frame; It also includes a conductive ring fixed to the side of the second fixing frame away from the temperature control transmission chuck, and the conductive ring is provided with a first wire connected to the plurality of magnetic sheet assemblies in a one-to-one correspondence; The outer wall of the casing is also provided with a backup power supply and a second wire arranged on the backup power supply, and the end of the second wire away from the backup power supply passes through the casing and the through holes opened on the sleeve in sequence and is provided with an electric patch. The electric patch is placed on the side wall of the conductive ring. When the conductive ring rotates, the electric patch always maintains contact with the conductive ring to ensure current flow.

5. The axial support device for a magnetic levitation motor according to claim 4, characterized in that: The magnetic sheet assembly includes an electromagnetic sheet and a magnet respectively arranged on opposite surfaces of the second fixing frame and the second clamping block and magnetically attracting and repelling each other.

6. The axial support device for a magnetic levitation motor according to claim 1, characterized in that: The casing is also provided with a cooling circulation structure, which includes a refrigerator and a liquid storage tank connected at the top and bottom, wherein the liquid storage tank is fixed on the casing, and two groups of liquid inlet pipes and liquid outlet pipes are arranged on the back sides of the refrigerator and the liquid storage tank, and the end of each group of the liquid inlet pipe and liquid outlet pipe away from the liquid storage tank is respectively connected to the inlet pipe and outlet pipe of one group of cooling suction components.

7. The axial support device for a magnetic levitation motor according to claim 1, characterized in that: The axial magnetic bearing includes an extended step portion connected to the rotor shaft; and an annular seat fixed inside the housing, wherein a limiting cavity is provided in the annular seat for limiting the position of the extended step portion; It also includes a magnetic block arranged inside the limiting cavity, which is used to control the position of the extended step portion.

8. The axial support device for a magnetic levitation motor according to claim 1, characterized in that: The displacement sensor comprises a mounting frame fixed inside the casing, and a sensor body is mounted on the mounting frame at equal distances close to the inner wall of the rotor shaft.

9. A heat dissipation method, applied to the axial support device of a magnetic levitation motor according to any one of claims 1 to 8, characterized in that: The heat dissipation method includes: S1; when the temperature of the device rises abnormally, the memory alloy can push the first clamping block to adaptively clamp the outer periphery of the rotor shaft according to the temperature, so as to drive the sleeve to rotate with the rotor shaft; S2; Synchronously with the above process: the suction cavity at the inlet pipe and outlet pipe positions expand and contract respectively to realize the suction process of the liquid from the inlet pipe to the outlet pipe, which drives the internal heat of the device and realizes the cooling cycle heat dissipation process of the device.

Images