CN117254633B - Bearing power switching device - Google Patents
Bearing power switching device Download PDFInfo
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- CN117254633B CN117254633B CN202311274424.2A CN202311274424A CN117254633B CN 117254633 B CN117254633 B CN 117254633B CN 202311274424 A CN202311274424 A CN 202311274424A CN 117254633 B CN117254633 B CN 117254633B
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- 239000000725 suspension Substances 0.000 claims abstract description 62
- 230000001360 synchronised effect Effects 0.000 claims abstract description 36
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to the technical field of motor bearing equipment, in particular to a bearing power switching device which comprises an electric part and a mechanical part, wherein the electric part comprises a displacement sensing belt, a controller and a power amplifier, the mechanical part comprises a shell, a rotor and a cooling system, two synchronous motor stators, two radial magnetic suspension bearings, two axial magnetic suspension bearings and three protection gap assemblies are fixedly connected inside the shell, and the rotor is sleeved inside the two synchronous motor stators, the two radial magnetic suspension bearings, the two axial magnetic suspension bearings and the three protection gap assemblies. The invention has the advantages that after the shaft center of the rotor collides with the protection bearing on the rotor for several times, the protection bearing is quickly pushed back to the position close to the center of the magnetic suspension bearing by the guide rod to continue to stably rotate, the protection bearings such as the deep groove ball bearing, the angular contact bearing and the like are protected, the cooling speed is increased by the cooling system, and the rotor is prevented from being burnt.
Description
Technical Field
The invention relates to the technical field of motor bearing equipment, in particular to a bearing power switching device.
Background
The mechanical bearing is used as an indispensable part for bearing the stator and the rotor of the motor, mechanical friction can be necessarily generated when the motor works, and when the magnetic suspension bearing works, the rotor of the motor is not contacted with the stator by utilizing the principle that magnetic fields attract each other and repel each other, so that mechanical friction does not occur, the magnetic suspension bearing in the bearing stably suspends the supported rotor by utilizing electromagnetic force, no mechanical friction exists between the supporting piece and the supported piece, and the mechanical bearing has incomparable advantages in friction loss, rotor rotating speed and the like compared with the traditional mechanical bearing.
In the existing part of magnetic suspension bearing motors, the safety of the protection bearing is lower, when the magnetic suspension bearing fails and falls down or is overloaded, the kinetic energy of the rotor is completely consumed by the protection bearing, the rotor rotating at high speed is in contact with the rolling bearing instantly, the impact of the rotor on the protection bearing is very large, the rotor moves unstably, backward whirling is easy to generate when violent collision occurs, and the huge vibration impact force and whirling force are usually accompanied with serious heating, so that the protection bearing can be damaged, the rotor and the stator can be damaged when serious damage occurs, and the rotor is burnt after the protection bearing cannot be acted after damage.
Disclosure of Invention
In order to improve the safety of the protection bearing, ensure that a rotor running at high speed is not contacted with a stator of the magnetic suspension bearing after the magnetic suspension bearing fails, thereby protecting the safety of the magnetic suspension bearing.
The bearing power switching device provided by the invention adopts the following technical scheme:
the bearing power switching device comprises an electric part and a mechanical part, wherein the electric part comprises a displacement sensing belt, a controller and a power amplifier, the mechanical part comprises a shell, a rotor and a cooling system, two synchronous motor stators, two radial magnetic suspension bearings, two axial magnetic suspension bearings and three protection gap components are fixedly connected in the shell, and the rotor is sleeved in the two synchronous motor stators, the two radial magnetic suspension bearings, the two axial magnetic suspension bearings and the three protection gap components.
By adopting the technical scheme, the controller controls the power amplifier to output a corresponding current value by comparing the difference value between the rotor position and the balance position, so that the driving line diagram generates electromagnetic force and the rotor is restrained from returning to the balance position.
Preferably, the outer surface of the rotor is fixedly connected with a thrust disc and a protection bearing, the two synchronous motor stators, the two radial magnetic suspension bearings and the two axial magnetic suspension bearings are symmetrically distributed on two sides of the thrust disc, the outer surfaces of the two axial magnetic suspension bearings are lapped on two sides of the thrust disc, and the two radial magnetic suspension bearings are located between the two synchronous motor stators.
By adopting the technical scheme, the radial magnetic suspension bearing provides radial supporting force, and the axial magnetic suspension bearing provides axial thrust.
Preferably, the protection bearing comprises a deep groove ball bearing and two angular contact bearings, and the deep groove ball bearing and the two angular contact bearings are sleeved in the corresponding protection gap components.
Preferably, each protection gap assembly comprises a fixed plate, an annular connecting rod and a plurality of guide rods, wherein one side of each fixed plate is fixedly connected with a plurality of locating pins, each fixed plate is connected with the annular connecting rod through corresponding locating pins, one side of each annular connecting rod is fixedly connected with a pin, and each annular connecting rod is connected with a plurality of guide rods through corresponding pins.
Preferably, the guide rods are all circumferentially arrayed on one side of the corresponding annular connecting rod.
Preferably, the fixed plate, the guide rod and the annular connecting rod of each protection gap assembly are sequentially and linearly arranged.
By adopting the technical scheme, tangential friction force is generated between the outer ring of the deep groove ball bearing, the outer rings of the two angular contact bearings and the surfaces of the contacted guide rods, and the tangential friction force drives the corresponding guide rods to rotate around the corresponding pins, so that the protection bearing drives the rotor to roll on the surfaces of the guide rods until the axle center of the rotor returns to the axle center of the magnetic suspension bearing.
Preferably, the cooling system comprises two fans, wherein the two fans are fixedly connected to the outer surface of the rotor, and the two fans are symmetrically or asymmetrically distributed on two sides of the thrust disc; the inside of shell has seted up the basin, the surface fixedly connected with inlet tube, outlet pipe of shell.
By adopting the technical scheme, the air flow around the rotor is accelerated by the fan, and the temperature reduction speed in the cooling shell is accelerated; the heat in the shell is exchanged through the cooling water, so that the parts in the shell are prevented from being burnt.
Preferably, the outer surface of the displacement sensing belt is fixedly connected to the inside of the shell, a plurality of displacement sensors are fixedly connected to the inside of the displacement sensing belt, and the plurality of displacement sensors are in a circumferential array; the power amplifier and the displacement sensors are all in communication connection with the controller.
By adopting the technical scheme, the measuring precision is convenient to be enhanced by the uniform distribution of the circumferences; and the controller is used for obtaining the output voltage of the sensor so as to indirectly obtain the position information of the magnetic suspension bearing rotor.
Preferably, the outer surface of the shell is fixedly connected with two fin groups, and each synchronous motor stator is positioned in the corresponding fin group.
Through adopting above-mentioned technical scheme, the higher air gap that can lead to synchronous machine stator, rotor reduces, influences actual bearing's controllability, can damage the insulating material of winding even, accelerates the heat dissipation of stator through the fin, reinforcing cooling effect.
Preferably, an arc surface is formed in the stator groove of the synchronous motor stator.
By adopting the technical scheme, the magnetic field distribution in the magnetic flux loop in the bearing is uneven, and the magnetic line concentration phenomenon can be effectively improved through the smooth inflection point of the tip end of the stator slot.
In summary, the invention has the following beneficial technical effects:
1. the device is provided with the protection clearance assembly, when the magnetic suspension bearing fails and falls or is overloaded, as the rotating speed of the rotor is still high, the shaft center of the rotor is pushed back to the position close to the center of the magnetic suspension bearing by the guide rod to continue to rotate stably after the protection bearing on the rotor is collided for several times, until the kinetic energy of the rotor is completely consumed, the kinetic energy of the rotor can be converted into tangential friction force, so that the rotor returns to the shaft center to continue to rotate, the protection bearings such as deep groove ball bearings and angular contact bearings are protected, the protection bearings are prevented from being damaged, and the rotor is prevented from being damaged;
2. the device is provided with the cooling system, when the device starts to operate, water with lower temperature is injected into the water tank through the water inlet pipe, the synchronous driving motor of the heating source, the radial magnetic suspension bearing and the axial magnetic suspension bearing are cooled, the water subjected to heat exchange leaves the shell through the water outlet pipe, and meanwhile, the fan rotates along with the rotor to drive the air in the shell to flow, so that the cooling speed is conveniently increased, the heat exchange during unstable rotor movement is facilitated, and the rotor is prevented from being burnt; the device is provided with the fin group to enhance the cooling effect by installing the radiating fins, so that the water cooling flow rate is prevented from being too fast compared with the cooling speed required by the synchronous motor stator, the air circulation speed is slower compared with the cooling speed required by the synchronous motor stator, and the cooling of the synchronous motor stator is enhanced.
Drawings
Fig. 1 is an exploded perspective view of a bearing power adapter of the present invention.
Fig. 2 is a D-direction view in fig. 1.
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged schematic view of a partial structure at C in FIG. 2;
FIG. 5 is a schematic side view of the bearing power adapter of the present invention;
FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5;
FIG. 7 is a schematic view of the structure of the bearing power adapter of the present invention in which the housing is connected to the fin sets;
fig. 8 is a schematic diagram of a stator slot structure of a stator of a synchronous motor in the bearing power switching device of the present invention.
Reference numerals illustrate:
1. a housing; 2. a rotor; 3. a synchronous motor stator; 4. radial magnetic suspension bearing; 5. an axial magnetic suspension bearing; 6. a thrust plate;
7. a protective gap assembly; 701. a fixing plate; 702. a positioning pin; 703. a ring link; 704. a guide rod;
8. deep groove ball bearings; 9. angular contact bearings; 10. a fan; 11. a water tank; 12. a water inlet pipe; 13. and a water outlet pipe.
Detailed Description
The invention is described in further detail below with reference to fig. 1-8.
The embodiment of the invention discloses a bearing power switching device, which comprises an electric part and a mechanical part, wherein the electric part comprises a displacement sensing belt (known technology), a controller (known technology) and a power amplifier (known technology), the power amplifier adopts pulse width modulation to realize coil current change, referring to figures 1, 2 and 6, the mechanical part comprises a shell 1, a rotor 2 and a cooling system, two synchronous motor stators 3, two radial magnetic suspension bearings 4 (known technology), two axial magnetic suspension bearings 5 (known technology) and three protection gap assemblies 7 are fixedly connected in the shell 1, the synchronous motor stators 3 and the rotor 2 form a synchronous driving motor, the rotor 2 is sheathed in the two synchronous motor stators 3, the two radial magnetic suspension bearings 4, the two axial magnetic suspension bearings 5 and the three protection gap assemblies 7, the stator electromagnet coils and the rotor 2 form the radial magnetic suspension bearings 4, the magnetic poles of the radial magnetic suspension bearings 4 are arranged in NSNSNSSN, the coil magnetic poles generating the same resultant force in the same direction are in the same direction, the magnetic field coupling degree between the adjacent magnetic poles is reduced, the radial bearings 4 provide radial supporting force, and the axial magnetic suspension bearings 5 provide axial thrust.
Referring to fig. 1, 2 and 6, the outer surface of the rotor 2 is fixedly connected with a thrust disc 6 and a protection bearing, two synchronous motor stators 3, two radial magnetic suspension bearings 4 and two axial magnetic suspension bearings 5 are symmetrically distributed on two sides of the thrust disc 6, the outer surfaces of the two axial magnetic suspension bearings 5 are lapped on two sides of the thrust disc 6, the radial magnetic suspension bearings 4 mainly provide radial electromagnetic force of the rotor 2, the axial magnetic suspension bearings 5 provide axial electromagnetic force for the thrust disc 6, the two radial magnetic suspension bearings 4 are positioned between the two synchronous motor stators 3, the axial magnetic suspension bearings 5 on two sides of the thrust disc 6 provide axial limiting, and the balance position of the thrust disc 6 coincides with the middle positions of the radial magnetic suspension bearings 4 and the axial magnetic suspension bearings 5.
Referring to fig. 1, 2 and 6, the protection bearing comprises a deep groove ball bearing 8 and two angular contact bearings 9, the deep groove ball bearing 8 and the two angular contact bearings 9 are sleeved in the corresponding protection gap assemblies 7, gaps exist between the deep groove ball bearing 8 and the two angular contact bearings 9 and the protection gap assemblies 7, the gaps between the protection bearing and the protection gap assemblies 7 are called protection gaps, and the protection bearing is directly installed on the rotor 2 and rotates along with the rotor 2.
Referring to fig. 1 and 6, each protection gap assembly 7 includes a fixed plate 701, an annular connecting rod 703 and a plurality of guide rods 704, one side of each fixed plate 701 is fixedly connected with a plurality of positioning pins 702, each fixed plate 701 is connected with the annular connecting rod 703 through a corresponding positioning pin 702, one side of each annular connecting rod 703 is fixedly connected with a pin, and each annular connecting rod 703 is connected with a plurality of guide rods 704 through a corresponding pin.
Referring to fig. 6, a plurality of guide rods 704 are all circumferentially arrayed on one side of the corresponding ring-shaped connecting rod 703, the plurality of guide rods 704 are uniformly distributed around the centers of the deep groove ball bearings 8 and the two angular contact bearings 9, and in the state that the rotor 2 is suspended, all the guide rods 704 are in respective initial positions, and at this time, initial protection gaps with the same size exist between the surface of each guide rod 704 and the deep groove ball bearings 8 and between the surface of each guide rod 704 and the surface of the deep groove ball bearings 9.
Referring to fig. 6, the fixed plate 701, the guide rods 704 and the annular connecting rods 703 of each protection gap assembly 7 are all arranged linearly in sequence, when the magnetic suspension bearing fails and falls down or is overloaded, the rotor 2 together with the protection bearing falls down onto any one of the guide rods 704, tangential friction force generated between the outer ring of the deep groove ball bearing 8, the outer ring of the two angular contact bearings 9 and the surface of the guide rod 704 drives the guide rod 704 to rotate around the pin connected with the guide rod, the constraint of the annular connecting rods 703 drives the same annular connecting rods 703, other guide rods 704 swing around the corresponding pins in a positioning manner, and the directions and angles of all the swing of the guide rods 704 are consistent, so that after the outer ring of the deep groove ball bearing 8, the outer rings of the two angular contact bearings 9 and the guide rods 704 collide several times, the rotor 2 is pushed back to the position close to the center of the magnetic suspension bearing by the guide rods 704 to continue to rotate stably until the kinetic energy of the rotor 2 is completely consumed.
Referring to fig. 1, 2 and 6, the cooling system includes two fans 10, the two fans 10 are fixedly connected to the outer surface of the rotor 2, the two fans 10 are symmetrically or asymmetrically distributed on two sides of the thrust disc 6, and the rotor 2 drives the fans 10 to rotate when rotating, so that the ventilation of the interior is increased, and the heat dissipation effect is achieved.
Referring to fig. 2 and 5, a water tank 11 is arranged in the shell 1, a water inlet pipe 12 and a water outlet pipe 13 are fixedly connected to the outer surface of the shell 1, water with lower temperature is injected into the water tank 11 through the water inlet pipe 12, heat in the shell 1 is exchanged, a synchronous driving motor of a heating source, a radial magnetic suspension bearing 4 and an axial magnetic suspension bearing 5 are cooled, and water subjected to heat exchange leaves the shell 1 through the water outlet pipe 13;
referring to fig. 6, the outer surface of the displacement sensor belt is fixedly connected to the inside of the housing 1, a plurality of displacement sensors are fixedly connected to the inside of the displacement sensor belt, the plurality of displacement sensors are in a circumferential array, and the displacement sensors are installed in a differential mode, namely in a mode of uniformly circumferentially distributed, so that the measurement accuracy can be improved, and each displacement sensor can measure the whole variation range of the rotor 2;
the power amplifier and the displacement sensors are all in communication connection with the controller, voltage signal output related to the detection distance can be obtained after the processing is carried out through a detection circuit inside the displacement sensor, and the position information of the magnetic bearing rotor 2 is indirectly obtained through obtaining the output voltage of the sensors in the controller.
Referring to fig. 7, two fin groups are fixedly connected to the outer surface of the housing 1, each synchronous motor stator 3 is located in the corresponding fin group, the coil of the synchronous motor stator 3 is heated seriously when the bearing device is in operation, hot air moves towards the opposite direction of gravity, so that the air gap between the synchronous motor stator 3 and the rotor is reduced, the cooling effect is enhanced by installing the radiating fins, the water cooling flow rate is prevented from being too fast compared with the cooling speed required by the synchronous motor stator 3, and the air circulation speed is slower compared with the cooling speed required by the synchronous motor stator 3.
Referring to fig. 8, an arc surface is formed in a stator slot of the synchronous motor stator 3, a transition fillet is adopted in the arc surface, and the transition fillet-shaped arc surface can effectively improve the distribution condition of magnetic flux density and weaken the phenomenon of concentration of magnetic lines of force at the inflection point of the tip end of the stator slot under the condition that the inflection point of the stator slot of the synchronous motor stator 3 is in smooth transition.
The bearing power switching device of the embodiment of the invention has the implementation principle that:
1. the displacement sensor can monitor the position of the rotor 2, once the position of the rotor 2 deviates, the displacement sensor can send a signal to inform the controller, a control system in the controller can give out an actual control signal according to the deviation position of the rotor 2, the control signal is processed by the power amplifier and converted into an electric signal, and then the electromagnetic force is changed by increasing or decreasing the current, so that the rotor 2 is controlled to a working position, namely, the rotor 2 is restrained to return to the balance position;
2. when the magnetic suspension bearing fails and falls or is overloaded, as the rotating speed of the rotor 2 is still high, the shaft center of the rotor 2 is pushed back to the position close to the center of the magnetic suspension bearing by the guide rod 704 to continue to rotate stably after the protection bearing on the rotor 2 collides for several times until the kinetic energy of the rotor is completely consumed, the kinetic energy of the rotor 2 can be converted into tangential friction force, so that the rotor 2 returns to the shaft center to rotate continuously;
3. when the device starts to operate, water with lower temperature is injected into the water tank 11 through the water inlet pipe 12, the heat source synchronous driving motor, the radial magnetic suspension bearing 4 and the axial magnetic suspension bearing 5 are cooled, the water subjected to heat exchange leaves the shell 1 through the water outlet pipe 13, and meanwhile, the fan 10 rotates along with the rotor 2, so that air in the shell 1 is driven to flow, and the cooling speed is increased.
The above embodiments are not intended to limit the scope of the present invention, so: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (7)
1. The bearing power switching device comprises an electric part and a mechanical part, wherein the electric part comprises a displacement sensing belt, a controller and a power amplifier, and is characterized in that: the mechanical part comprises a shell (1), a rotor (2) and a cooling system, wherein two synchronous motor stators (3), two radial magnetic suspension bearings (4), two axial magnetic suspension bearings (5) and three protection gap components (7) are fixedly connected inside the shell (1), and the rotor (2) is sleeved inside the two synchronous motor stators (3), the two radial magnetic suspension bearings (4), the two axial magnetic suspension bearings (5) and the three protection gap components (7);
the outer surface of the rotor (2) is fixedly connected with a thrust disc (6) and a protection bearing, the two synchronous motor stators (3), the two radial magnetic suspension bearings (4) and the two axial magnetic suspension bearings (5) are symmetrically distributed on two sides of the thrust disc (6), the outer surfaces of the two axial magnetic suspension bearings (5) are lapped on two sides of the thrust disc (6), and the two radial magnetic suspension bearings (4) are positioned between the two synchronous motor stators (3);
the protection bearing comprises a deep groove ball bearing (8) and two angular contact bearings (9), wherein the deep groove ball bearing (8) and the two angular contact bearings (9) are sleeved in the corresponding protection gap assemblies (7);
every protection clearance subassembly (7) all include fixed plate (701), annular connecting rod (703) and a plurality of guide bar (704), every one side of fixed plate (701) all fixedly connected with a plurality of locating pin (702), every fixed plate (701) all is connected with annular connecting rod (703) through corresponding locating pin (702), every one side fixedly connected with pin of annular connecting rod (703), every annular connecting rod (703) all is connected with a plurality of guide bar (704) through corresponding pin.
2. The bearing power adapter as in claim 1, wherein: the guide rods (704) are all circumferentially arrayed on one side of the corresponding annular connecting rod (703).
3. The bearing power adapter as in claim 2, wherein: the fixed plate (701), the guide rod (704) and the annular connecting rod (703) of each protection clearance assembly (7) are sequentially and linearly arranged.
4. The bearing power adapter as in claim 1, wherein: the cooling system comprises two fans (10), wherein the two fans (10) are fixedly connected to the outer surface of the rotor (2), and the two fans (10) are symmetrically or asymmetrically distributed on two sides of the thrust disc (6);
the water tank (11) is arranged in the shell (1), and the outer surface of the shell (1) is fixedly connected with the water inlet pipe (12) and the water outlet pipe (13).
5. The bearing power adapter as in claim 1, wherein: the outer surface fixed connection of displacement sensing area is in the inside of shell (1), the inside fixedly connected with of displacement sensing area a plurality of displacement sensor, a plurality of displacement sensor is the circumference array, power amplifier, a plurality of displacement sensor all with controller communication connection.
6. The bearing power adapter as in claim 1, wherein: the outer surface of the shell (1) is fixedly connected with two fin groups, and each synchronous motor stator (3) is located in the corresponding fin group.
7. The bearing power adapter as in any of claims 1-6, wherein: an arc surface is formed in the stator groove of the synchronous motor stator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311274424.2A CN117254633B (en) | 2023-09-28 | 2023-09-28 | Bearing power switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311274424.2A CN117254633B (en) | 2023-09-28 | 2023-09-28 | Bearing power switching device |
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| Publication Number | Publication Date |
|---|---|
| CN117254633A CN117254633A (en) | 2023-12-19 |
| CN117254633B true CN117254633B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311274424.2A Active CN117254633B (en) | 2023-09-28 | 2023-09-28 | Bearing power switching device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118157400B (en) * | 2024-03-14 | 2024-09-13 | 常州工学院 | Magnetic suspension high-speed permanent magnet motor with water cooling structure |
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| CN115388087A (en) * | 2022-08-15 | 2022-11-25 | 江苏明磁动力科技有限公司 | Axial magnetic bearing current-based axial suspension position control method for magnetic suspension motor |
| CN115853900A (en) * | 2022-12-31 | 2023-03-28 | 上海大学 | Radial and axial active magnetic suspension bearing suitable for motor |
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2023
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115388087A (en) * | 2022-08-15 | 2022-11-25 | 江苏明磁动力科技有限公司 | Axial magnetic bearing current-based axial suspension position control method for magnetic suspension motor |
| CN115853900A (en) * | 2022-12-31 | 2023-03-28 | 上海大学 | Radial and axial active magnetic suspension bearing suitable for motor |
Non-Patent Citations (1)
| Title |
|---|
| 机械加工误差对主动磁悬浮轴承性能的影响;崔东辉;徐龙祥;;机械工程学报;20090615(第06期);24-33 * |
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| CN117254633A (en) | 2023-12-19 |
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