CN110108896B - Speed measuring device suitable for high-speed rotating magnetic suspension main shaft - Google Patents
Speed measuring device suitable for high-speed rotating magnetic suspension main shaft Download PDFInfo
- Publication number
- CN110108896B CN110108896B CN201910569953.2A CN201910569953A CN110108896B CN 110108896 B CN110108896 B CN 110108896B CN 201910569953 A CN201910569953 A CN 201910569953A CN 110108896 B CN110108896 B CN 110108896B
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- main shaft
- magnetic suspension
- suspension main
- speed
- servo motor
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- 239000000725 suspension Substances 0.000 title claims abstract description 63
- 238000006073 displacement reaction Methods 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 11
- 238000005339 levitation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
Abstract
The application discloses a speed measuring device suitable for a high-speed rotating magnetic suspension main shaft, which comprises a fixed disc and a magnetic suspension main shaft; the middle part of the fixed disc is provided with a hole for accommodating the penetrated magnetic suspension main shaft; the bottom of the fixed disc is provided with a main shaft speed measuring device; the spindle speed measuring device comprises a code disc and a servo motor fixed in the motor container; the code disc is sleeved on the magnetic suspension main shaft; the motor container seat is arranged at the bottom of the fixed disc, and the output shaft of the servo motor is connected with the screw rod in a linkage way to drive the screw rod to move up and down; a movable slide block is fixedly sleeved on the screw rod, and a ranging sensor and a photoelectric encoder are fixedly arranged on the side surface of the movable slide block; the ranging sensor and the photoelectric encoder are positioned on the same vertical plane, and the edge of the code wheel is positioned between the ranging sensor and the photoelectric encoder; the servo motor, the code wheel, the ranging sensor and the photoelectric encoder are all electrically connected with an external computer.
Description
Technical Field
The application belongs to the technical field of magnetic suspension speed measurement, and particularly relates to a speed measurement device suitable for a high-speed rotating magnetic suspension main shaft.
Background
The existing measurement of the rotating speed of the superconductive magnetic suspension main shaft is carried out by a Hall sensor fixed on a motor stator, but the speed measurement limit of the Hall sensor is 6000 r/min-7000 r/min, the magnetic suspension main shaft with the rotating speed above 7000r/min cannot be measured, and the photoelectric encoder can well compensate the limitation of the Hall sensor. In addition, the superconductive magnetic suspension bearing generates axial displacement during working, and the sensor is arranged at the position and coaxially rotates with the main shaft for measuring the axial displacement and the rotating speed of the main shaft.
The existing measurement of the rotating speed of the superconducting magnetic suspension main shaft is carried out through a Hall sensor fixed on a motor stator, but the rotating speed of a superconducting flywheel is higher, and the measurement of the rotating speed of the Hall sensor is limited; and meanwhile, detection of the displacement of the spindle core of the spindle is also lacking.
Disclosure of Invention
The application aims to overcome the defects in the prior art and provide a speed measuring device suitable for a high-speed rotating magnetic suspension main shaft so as to solve or improve the problems.
In order to achieve the above purpose, the application adopts the following technical scheme:
the speed measuring device suitable for the high-speed rotating magnetic suspension main shaft comprises a fixed disc and a magnetic suspension main shaft; the middle part of the fixed disc is provided with a hole for accommodating the penetrated magnetic suspension main shaft; the bottom of the fixed disc is provided with a main shaft speed measuring device;
the spindle speed measuring device comprises a code disc and a servo motor fixed in the motor container seat; the code disc is sleeved on the magnetic suspension main shaft; the motor container seat is arranged at the bottom of the fixed disc, and the output shaft of the servo motor is connected with the screw rod in a linkage way to drive the screw rod to move up and down; a movable slide block is fixedly sleeved on the screw rod, and a ranging sensor and a photoelectric encoder are fixedly arranged on the side surface of the movable slide block; the ranging sensor and the photoelectric encoder are positioned on the same vertical plane, and the edge of the code wheel is positioned between the ranging sensor and the photoelectric encoder;
the servo motor, the code wheel, the ranging sensor and the photoelectric encoder are all electrically connected with an external computer.
Preferably, the fixed disk is a hollow disk.
Preferably, the motor receptacle is mounted on the fixed disk by screws.
Preferably, the code disc is sleeved on the main shaft in a suspending way and keeps a coaxial state with the main shaft.
Preferably, the servo motor is ASDM-060130B; the model of the code disc is 36, and the outer diameter is 200; the model of the ranging sensor is TFMINI; the model of the photoelectric encoder is GL5506.
A control method suitable for a high-speed rotating magnetic suspension main shaft speed measuring device comprises the following steps:
when the superconducting magnetic suspension bearing works, the magnetic suspension main shaft is required to move upwards for a certain distance in the axial direction to realize a cold condition, when the magnetic suspension main shaft moves upwards, the distance measurement sensor transmits the collected axial displacement of the magnetic suspension main shaft to an external computer in real time, the external computer obtains an error e according to a preset value and the actually collected axial displacement of the magnetic suspension main shaft, if the error e is larger than the preset error value, the servo motor is controlled to rotate, and the movable sliding block is driven to move upwards correspondingly through the screw rod; when the error e is smaller than or equal to a preset error value, the servo motor is controlled to stop rotating; and simultaneously, the rotating speed of the main shaft is measured through the photoelectric encoder and the code disc.
Preferably, the method further comprises:
the superconducting magnetic suspension bearing rotor descends to capture magnetic flux, when the magnetic suspension main shaft descends, the distance measuring sensor transmits the collected axial displacement of the magnetic suspension main shaft to an external computer in real time, the external computer obtains an error e according to a preset value and the actually collected axial displacement of the magnetic suspension main shaft, if the error e is larger than the preset error value, the servo motor is controlled to rotate, and the movable sliding block is driven to move downwards correspondingly through the screw rod; when the error e is smaller than or equal to a preset error value, the servo motor is controlled to stop rotating; and simultaneously, the rotating speed of the magnetic suspension main shaft is measured through the photoelectric encoder and the code disc.
The speed measuring device suitable for the high-speed rotating magnetic suspension main shaft has the following beneficial effects:
the application can synchronously detect the displacement and the rotating speed of the magnetic suspension main shaft along with the rotation and the movement of the magnetic suspension main shaft, and synchronously detect the displacement of the shaft core of the magnetic suspension main shaft and the corresponding rotating speed according to the error e of the displacement, thereby having important significance for the operation condition and the later maintenance of the magnetic suspension main shaft.
Drawings
Fig. 1 is a block diagram of a speed measuring device for a high-speed rotating magnetic levitation spindle.
Fig. 2 is a diagram of a spindle speed measuring device suitable for a high-speed rotating magnetic levitation spindle speed measuring device.
Fig. 3 is an error flow chart suitable for the high-speed rotating magnetic levitation spindle speed measuring device.
1. A magnetic levitation main shaft; 2. a code wheel; 3. a fixed plate; 4. a servo motor; 5. a ranging sensor; 6. moving the slide block; 7. a photoelectric encoder; 8. a screw rod; 9. a motor container base.
Detailed Description
The following description of the embodiments of the present application is provided to facilitate understanding of the present application by those skilled in the art, but it should be understood that the present application is not limited to the scope of the embodiments, and all the applications which make use of the inventive concept are protected by the spirit and scope of the present application as defined and defined in the appended claims to those skilled in the art.
According to one embodiment of the application, referring to fig. 1 and 2, the speed measuring device for the magnetic suspension main shaft 1 suitable for high-speed rotation in the scheme comprises a fixed disc 3 and the magnetic suspension main shaft 1, wherein the fixed disc 3 is a hollow disc, a hole is formed in the middle of the fixed disc 3 and is used for accommodating the magnetic suspension main shaft 1 passing through, and the magnetic suspension main shaft 1 is positioned in the center of the hole; the bottom of the fixed disc 3 is provided with a spindle speed measuring device which is used for detecting the displacement of the spindle core and the corresponding rotating speed when the magnetic suspension spindle 1 moves up and down.
The spindle speed measuring device will be described in detail below
The spindle speed measuring device comprises a servo motor 4, a code wheel 2, a distance measuring sensor 5 and a photoelectric encoder 7. Wherein, servo motor 4 is fixed in motor container seat 9, and motor container seat 9 passes through the screw and installs in fixed disk 3 bottom.
The code disc 2 is sleeved on the main shaft in a suspending way and is kept in a coaxial state with the magnetic suspension main shaft 1, and is used for measuring the rotating speed of the magnetic suspension main shaft 1.
The output shaft of the servo motor 4 is connected with the screw rod 8 in a linkage way, namely, the servo motor 4 can drive the screw rod 8 to move up and down, a movable slide block 6 is fixedly sleeved on the screw rod 8, and the movement of the screw rod 8 can further drive the movable slide block 6 to move together.
The ranging sensor 5 and the photoelectric encoder 7 are fixedly arranged on the side face of the movable sliding block 6, the ranging sensor 5 and the photoelectric encoder 7 are positioned on the same vertical face, and the edge of the code wheel 2 is positioned between the ranging sensor 5 and the photoelectric encoder 7.
The distance measuring sensor 5 (based on the light flight time, the distance parameter is obtained by calculating the emitted light pulse and the receiving time) is used for detecting the transverse distance of the magnetic levitation spindle 1, and the displacement of the magnetic levitation spindle 1 in the transverse direction is obtained through the detection of the data of two times.
The servo motor 4, the code wheel 2, the distance measuring sensor 5 and the photoelectric encoder 7 are all electrically connected with the outside, the code wheel 2, the distance measuring sensor 5 and the photoelectric encoder 7 respectively transmit the detected data to the outside computer, and the servo motor 4 is controlled by the outside computer.
Wherein, the model of the servo motor 4 is ASDM-060130B; the model of the code wheel 2 is 36, and the outer diameter is 200; the model of the ranging sensor 5 is TFMINI; the model of the photoelectric encoder 7 is GL5506.
Referring to fig. 3, according to an embodiment of the present application, a control method for a speed measuring device for a high-speed rotating magnetic levitation spindle 1 includes:
when the superconducting magnetic suspension bearing works, the magnetic suspension main shaft 1 needs to move upwards for a certain distance in the axial direction to realize a cold condition, when the magnetic suspension main shaft 1 moves upwards, the distance measurement sensor 5 transmits the collected axial displacement of the magnetic suspension main shaft 1 to an external computer in real time, the external computer obtains an error e according to a preset value and the actually collected axial displacement of the magnetic suspension main shaft 1, and if the error e is larger than the preset error value, the servo motor 4 is controlled to rotate, and the movable sliding block 6 is driven to correspondingly move upwards through the screw rod 8; when the error e is smaller than or equal to a preset error value, the servo motor 4 is controlled to stop rotating; meanwhile, when the servo motor 4 rotates or does not rotate, the rotation speed of the main shaft is measured through the photoelectric encoder 7 and the code wheel 2.
When the superconducting magnetic suspension bearing rotor descends to capture magnetic flux, the distance measurement sensor 5 transmits the collected axial displacement of the magnetic suspension main shaft 1 to an external computer in real time, the external computer obtains an error e according to a preset value and the actually collected axial displacement of the magnetic suspension main shaft 1, and if the error e is larger than the preset error value, the servo motor 4 is controlled to rotate, and the movable sliding block 6 is driven to correspondingly move downwards through the screw rod 8; when the error e is smaller than or equal to a preset error value, the servo motor 4 is controlled to stop rotating; meanwhile, when the servo motor 4 rotates or does not rotate, the rotation speed of the magnetic suspension main shaft 1 is measured through the photoelectric encoder 7 and the code disc 2.
The application can realize synchronous detection along with the shaft, can efficiently and stably measure the rotating speed of the high-speed rotating main shaft, and can realize the axial displacement measurement of the main shaft.
Although specific embodiments of the application have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (3)
1. The utility model provides a be applicable to high-speed rotatory magnetic suspension main shaft speed measuring device which characterized in that: comprises a fixed disc and a magnetic suspension main shaft; the middle part of the fixed disc is provided with a hole for accommodating the penetrated magnetic suspension main shaft; the bottom of the fixed disc is provided with a main shaft speed measuring device;
the spindle speed measuring device comprises a code disc and a servo motor fixed in a motor container seat; the code disc is sleeved on the magnetic suspension main shaft; the motor container seat is arranged at the bottom of the fixed disc, and the output shaft of the servo motor is connected with the screw rod in a linkage way to drive the screw rod to move up and down; a movable sliding block is fixedly sleeved on the screw rod, and a ranging sensor and a photoelectric encoder are fixedly arranged on the side surface of the movable sliding block; the ranging sensor and the photoelectric encoder are positioned on the same vertical plane, and the edge of the code wheel is positioned between the ranging sensor and the photoelectric encoder;
the servo motor, the code disc, the ranging sensor and the photoelectric encoder are all electrically connected with the outside;
the control method comprises the following steps:
when the superconducting magnetic suspension bearing works, the magnetic suspension main shaft is required to move upwards for a certain distance in the axial direction to realize a cold condition, when the magnetic suspension main shaft moves upwards, the distance measurement sensor transmits the collected axial displacement of the magnetic suspension main shaft to an external computer in real time, the external computer obtains an error e according to a preset value and the actually collected axial displacement of the magnetic suspension main shaft, if the error e is larger than the preset error value, the servo motor is controlled to rotate, and the movable sliding block is driven to move upwards correspondingly through the screw rod; when the error e is smaller than or equal to a preset error value, the servo motor is controlled to stop rotating; simultaneously, the rotation speed of the main shaft is measured through the photoelectric encoder and the code disc;
the superconducting magnetic suspension bearing rotor descends to capture magnetic flux, when the magnetic suspension main shaft descends, the distance measuring sensor transmits the collected axial displacement of the magnetic suspension main shaft to an external computer in real time, the external computer obtains an error e according to a preset value and the actually collected axial displacement of the magnetic suspension main shaft, if the error e is larger than the preset error value, the servo motor is controlled to rotate, and the movable sliding block is driven to move downwards correspondingly through the screw rod; when the error e is smaller than or equal to a preset error value, the servo motor is controlled to stop rotating; simultaneously, the rotating speed of the magnetic suspension main shaft is measured through a photoelectric encoder and a code disc;
the fixed disc is a hollow disc;
the motor container seat is arranged on the fixed disc through screws.
2. The device for measuring speed of a high-speed rotating magnetic levitation spindle according to claim 1, wherein: the code disc is sleeved on the main shaft in a suspending way and is kept in a coaxial state with the main shaft.
3. The device for measuring speed of a high-speed rotating magnetic levitation spindle according to claim 1, wherein: the type of the servo motor is ASDM-060130B; the model of the code disc is 36, and the outer diameter is 200mm; the model of the ranging sensor is TFMINI; the model of the photoelectric encoder is GL5506.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910569953.2A CN110108896B (en) | 2019-06-27 | 2019-06-27 | Speed measuring device suitable for high-speed rotating magnetic suspension main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910569953.2A CN110108896B (en) | 2019-06-27 | 2019-06-27 | Speed measuring device suitable for high-speed rotating magnetic suspension main shaft |
Publications (2)
| Publication Number | Publication Date |
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| CN110108896A CN110108896A (en) | 2019-08-09 |
| CN110108896B true CN110108896B (en) | 2023-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910569953.2A Active CN110108896B (en) | 2019-06-27 | 2019-06-27 | Speed measuring device suitable for high-speed rotating magnetic suspension main shaft |
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| CN111458531B (en) * | 2020-04-29 | 2021-01-05 | 华中科技大学 | Rotor displacement-based rotating speed monitoring system for magnetic suspension spindle |
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