CN213317715U - Pure air-cooled ultrahigh-speed high-precision high-power miniaturized magnetic suspension electric spindle - Google Patents
Pure air-cooled ultrahigh-speed high-precision high-power miniaturized magnetic suspension electric spindle Download PDFInfo
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- CN213317715U CN213317715U CN202021276450.0U CN202021276450U CN213317715U CN 213317715 U CN213317715 U CN 213317715U CN 202021276450 U CN202021276450 U CN 202021276450U CN 213317715 U CN213317715 U CN 213317715U
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Abstract
The invention belongs to the field of motors, and relates to a pure air-cooled ultrahigh-speed high-precision large-power miniaturized magnetic suspension electric spindle. The invention comprises the following steps: the fan comprises a shell, a stator, a fan, a main shaft, a front end magnetic bearing, a rear end magnetic bearing, a finned radiator and a sealing assembly. The invention has the advantages of pure air cooling, ultrahigh speed, high precision, high power and miniaturization. By applying the magnetic suspension friction-free technology, the stepless speed change between 0 and 100000r/min of the magnetic bearing can be realized within 60 seconds, the stable work under different occasions, different rotating speeds and different working conditions is met, and the safe and reliable operation of the bearing under the conditions of high speed, high temperature, large vibration, transcritical rotating speed, extremely complex and harsh working conditions is ensured. And the major problem of difficult sealing of the electric spindle is solved by adopting a pure air cooling design. The magnetic suspension motorized spindle can meet the requirements of modern equipment on ultrahigh speed, high precision, high power and miniaturization. The invention adopts a high-speed and high-efficiency permanent magnet synchronous motor and a control technology, and the total efficiency reaches the international leading level.
Description
Technical Field
The invention relates to a pure air-cooled ultrahigh-speed high-precision high-power miniaturized magnetic suspension electric spindle.
Background
Modern high-technology products are assembled through high-integration degree and precision parts and parts, high-precision products are formed by adding precision equipment instruments, zero-inventory and order purchasing brings new challenges to equipment manufacturing industries and vitality to high-speed processing technologies. Various high-precision machine tools and numerical control machine tools become the main force of the equipment manufacturing industry at present, and the machining efficiency and the machining precision of the machine tools are more and more concerned by the society. The magnetic suspension technology brings a friction-free world, and the magnetic suspension bearing can be accelerated within 1 second by controlling the magnetic suspension bearing, so that high power is achieved, miniaturization can be realized, and the most important and most core components in high-speed processing are fundamentally solved. The design of pure air cooling can solve the major problem of difficult sealing of the electric main shaft. The magnetic suspension technology is a high-tech technology and also a sunrise industry, and is widely accepted by the global industrial industry, and the magnetic suspension main shaft can meet the requirements of modern equipment on ultrahigh speed, high precision, high power and miniaturization.
Disclosure of Invention
The invention aims to provide a pure air-cooled ultrahigh-speed high-precision high-power miniaturized magnetic suspension electric spindle.
The magnetic levitation motorized spindle according to the present invention comprises: the motor comprises a shell, a stator fin radiator, a magnetic bearing, a rotor and a fan coaxially connected with the rotor; an air inlet and an air outlet are formed on the shell, and a closed working air channel is formed among the shell, the stator radiator and the front and rear magnetic bearings.
The motor comprises a shell, a stator and a motor stator, wherein an accommodating cavity is formed in the shell, and a stator fin radiator and the motor stator are arranged in the accommodating cavity; the left end and the right end are provided with a front end surface magnetic bearing component and a rear end magnetic bearing component; the stator fin radiator is provided with a groove for ventilation; the stator is arranged in the accommodating cavity, a stator cooling cavity is arranged on the stator, and the stator cooling cavity is connected with the stator fin radiator; the magnetic bearing, its magnetic density, bearing diameter, bearing length, through calculating accurately according to the electric main shaft power size design manufacturing, put into holding the intracavity, pass the motor stator, the stator is rotatable. The magnetic bearing component consists of a permanent magnet, a sensor, an input power supply and the like; the shell is provided with an air inlet and an air outlet, so that the smooth flowing of normal-temperature clean air is ensured, and heat generated by the high-speed running of the magnetic bearing is taken away.
The electric spindle of the embodiment of the invention has the advantages of pure air secondary cooling, ultrahigh speed, high precision, high power and miniaturization.
In addition, the electric spindle of the above embodiment of the present invention may further have the following additional technical features:
the electric spindle adopts a high-speed and high-efficiency permanent magnet synchronous motor and a control technology, and the total efficiency of the motor and a motor control system reaches the international leading level at the maximum.
The electric spindle stator is provided with a temperature sensor and an alarm device, and the alarm device is connected with the temperature sensor so as to carry out interpretation and alarm prompt according to the detection value of the stator temperature sensor.
Drawings
FIG. 1 is a schematic structural diagram of an electric spindle with a magnetic suspension pure air cooling structure;
FIG. 2 is a schematic structural diagram of a magnetic suspension pure air cooling structure electric spindle rear end magnetic bearing;
FIG. 3 is a structural schematic diagram of a magnetic bearing at the front end of an electric spindle with a magnetic suspension pure air cooling structure;
FIG. 4 is a structural schematic diagram of an axial magnetic bearing of an electric spindle with a magnetic suspension pure air cooling structure;
FIG. 5 is an air-cooled schematic diagram of an electric spindle of a magnetic levitation pure air-cooled structure;
fig. 6 is a structural view of a fin heat sink.
In the figure, 1, fan; 2. a back-end magnetic bearing; 3, a stator; 4. a housing; 5. a main shaft; 6. a finned heat sink; 7. a front-end magnetic bearing; 8. sealing; 9. laminating; 10. a rear magnetic bearing housing; 11. a rear radial sensor; 12. laminating; 13. a front end magnetic bearing housing; 14. a front end radial sensor; 15. an axial magnetic bearing housing; 16. front end protection; 17. a coil; 18. front end auxiliary axial protection; 19. an axial sensor.
Detailed Description
The invention is explained below by referring to the figures.
The magnetic levitation motorized spindle of the present invention is described with reference to the accompanying drawings. As shown in fig. 1 to 6, the magnetic levitation motorized spindle of the present invention includes: the fan comprises a fan 1, a rear-end magnetic bearing 2, a stator 3, a shell 4, a main shaft 5, a finned radiator 6, a front-end magnetic bearing 7 and a sealing assembly 8.
The casing has the chamber of holding in the casing, holds the built-in stator fin radiator 6 of chamber, motor stator 3 and main shaft 5. The shell is provided with an air inlet and an air outlet, so that the smooth flowing of normal-temperature clean air is ensured, and heat generated by the high-speed running of the magnetic bearing is taken away.
The stator 3 is embedded in the finned radiator 6, and a stator cooling flow channel is arranged on the stator 3.
The main shaft 5 is composed of a bearing seat, a permanent magnet, a silicon steel sheet, a connecting sleeve and the like, is arranged in the accommodating cavity and is a magnetic bearing, the magnetic density, the diameter of the bearing and the length of the bearing are designed and manufactured according to the power of the electric main shaft through accurate calculation, the magnetic density, the diameter of the bearing and the length of the bearing penetrate through the motor stator 3, and the stator 3 can rotate. The main shaft is speeded up quickly, and can realize 0-100000 revolutions per minute within tens of seconds.
The magnetic suspension electric spindle rear end magnetic bearing comprises: a laminated assembly 9, a rear magnetic bearing housing 10, and a rear radial sensor 11.
The magnetic bearing at the front end of the magnetic suspension electric spindle comprises: the laminated assembly 2, the front end magnetic bearing shell 13 and the front end radial sensor 14.
An axial magnetic bearing for a magnetically levitated electric spindle comprising: an axial magnetic bearing shell 15, a front end protection 16, a coil 17, a front end auxiliary axial protection 18 and an axial sensor 19.
The working principle is as follows: after the magnetic suspension electric main shaft is electrified, the main shaft 5 is under the command of the control system, and the front-end magnetic bearing 7 and the rear-end magnetic bearing 2 are controlled by electromagnetic force to suspend the main shaft; when the main shaft 5 receives an external instruction, the main shaft 5 starts to rotate under the driving of electromagnetic force to drive the fan to rotate, filtered normal-temperature air flows in from the air inlet of the shell and flows through the grooves and the ventilation channels on the fins 6 of the radiator, most of heat generated by the motor stator is discharged from the exhaust holes, and the stator of the magnetic suspension motor is cooled. The shell 4 is made of metal castings, has good heat conductivity, and can dissipate heat conducted by the radiator fins 6 into the air to achieve the effect of auxiliary cooling.
The magnetic suspension electric spindle is installed in an interference fit mode, the size of the electric spindle is greatly reduced, a large amount of space is saved, the electric spindle is suitable for occasions with limited space size, the speed is easily increased by adopting a magnetic suspension and control technology, and vibration of the electric spindle during working is greatly reduced.
The electric spindle cools the electric spindle by arranging the rotor pure air cooling stator fin radiator in the shell, so that a bearing of the electric spindle can not work at a high temperature all the time, and the long-time high-precision stable work of the electric spindle is ensured.
The rotating speed of the electric spindle can realize stepless speed change between 0 and 100000r/min, so that the electric spindle can stably work in different occasions, different rotating speeds and different working conditions, and the bearing can be ensured to safely and reliably run under the conditions of high speed, high temperature, large vibration, trans-critical rotating speed, extremely complex and harsh working conditions. The high power ensures that the electric main shaft transmits larger torque, thereby ensuring that the electric main shaft can be used in more and wider occasions.
The electric spindle is suitable for special occasions, and is particularly suitable for high-precision drilling and milling machines, various high-precision numerical control machines, high-precision carving special machine tools, high-precision grinding machines, other machine tools requiring ultra-high rotating speed, high precision and high power occasions, high-speed centrifuges, rotary milling machine tools and the like. The magnetic suspension electric spindle can also be used in the industries of aerospace, ships and the like and in some fields which need to use an ultra-high-speed high-precision high-power electric spindle.
Claims (1)
1. A pure air-cooled ultrahigh-speed high-precision high-power miniaturized magnetic suspension electric spindle is characterized by comprising a shell, a stator, a fan, a spindle, a front-end magnetic bearing, a rear-end magnetic bearing, a finned radiator and a sealing assembly, wherein an accommodating cavity is formed in the shell, and the accommodating cavity is internally provided with the stator finned radiator, a motor stator and the spindle; the radiator fins are arranged in the accommodating cavity and connected with the shell, and grooves are formed in the radiator fins to form airflow channels with the shell; the front-end magnetic bearing consists of a lamination, a front-end magnetic bearing shell and a front-end radial sensor; the rear-end magnetic bearing is composed of a lamination, a rear-end magnetic bearing shell and a rear-end radial sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021276450.0U CN213317715U (en) | 2020-07-01 | 2020-07-01 | Pure air-cooled ultrahigh-speed high-precision high-power miniaturized magnetic suspension electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021276450.0U CN213317715U (en) | 2020-07-01 | 2020-07-01 | Pure air-cooled ultrahigh-speed high-precision high-power miniaturized magnetic suspension electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213317715U true CN213317715U (en) | 2021-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021276450.0U Active CN213317715U (en) | 2020-07-01 | 2020-07-01 | Pure air-cooled ultrahigh-speed high-precision high-power miniaturized magnetic suspension electric spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213317715U (en) |
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2020
- 2020-07-01 CN CN202021276450.0U patent/CN213317715U/en active Active
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