CN112284618A - Dynamic balance adjusting device of high-precision precise centrifuge - Google Patents
Dynamic balance adjusting device of high-precision precise centrifuge Download PDFInfo
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- CN112284618A CN112284618A CN201910685291.5A CN201910685291A CN112284618A CN 112284618 A CN112284618 A CN 112284618A CN 201910685291 A CN201910685291 A CN 201910685291A CN 112284618 A CN112284618 A CN 112284618A
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- centrifuge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating unbalance
- G01M1/36—Compensating unbalance by adjusting position of masses built-in the body to be tested
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
- G01C25/005—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass initial alignment, calibration or starting-up of inertial devices
Abstract
The invention relates to a dynamic balance adjusting device of a high-precision precise centrifuge, which is used for compensating a rotation error of the precise centrifuge during high-speed operation. The device comprises a fine motion adjusting device, a balancing device, a plane mirror, a prism assembly, a high-speed collecting light tube, a light tube bracket and the like. Two micro-adjusting devices are arranged on the table board of the centrifuge and positioned in the X and Y directions, balancing devices are arranged opposite to the micro-adjusting devices and symmetrically distributed according to a main shaft, a plane mirror is arranged in the center of the table board, and a prism assembly and a high-speed collecting light tube are arranged above the table board. Through dynamic balance adjusting device, can carry out real-time supervision and collection to the gyration error that precision centrifuge produced at high-speed motion in-process to compensate the error that exists through actuating mechanism, improve the precision and the stability of system. The device has the advantages of reasonable structural design, low cost, simple and convenient working mode, easy realization, good practicability and applicability and important engineering practical value.
Description
Technical Field
The invention relates to a dynamic balance adjusting device of a high-precision precise centrifuge, which has the advantages that each component of the device is reasonable in design, real-time precision errors generated in a high-speed rotation state of the precise centrifuge are reduced, and the precision and the stability of the precise centrifuge in high-speed operation are greatly improved.
Background
The precision centrifuge is a detection device for verifying a linear accelerometer, a gyroscope and an inertial navigation guidance system by reproducing an acceleration physical quantity value through angular motion, and is an important inertial navigation test device for calibrating the accelerometer, wherein the calibration precision of the accelerometer depends on the accuracy and the attitude accuracy of the acceleration generated by the precision centrifuge, so that the system accuracy of the precision centrifuge is improved, the precision error generated when the system runs at high speed is reduced, and the precision calibration method is an important technical means for improving the test precision and the calibration precision of the acceleration.
In an inertial navigation and guidance system, an accelerometer is a core device of the inertial navigation system, and the performance of the accelerometer directly influences the control precision of the whole inertial navigation system, so that the performance calibration of the accelerometer is an important test work. At present, a high-precision precise centrifuge becomes necessary equipment in navigation control movement, and is important detection equipment for calibrating a centrifugal accelerometer, and with the increasing precision requirement of the accelerometer, the technical state of a common centrifuge cannot complete precise calibration of the accelerometer, so that higher requirements are provided for the precision error of the centrifuge. In order to solve the above problems and improve the dynamic precision of the precision centrifuge, a dynamic balance adjustment device needs to be designed to compensate and reduce the precision error generated during the high-speed rotation of the precision centrifuge.
Disclosure of Invention
The invention aims to design and invent a dynamic balancing device of a precision centrifuge to compensate precision errors generated by the precision centrifuge in a high-speed operation working state so as to improve the dynamic precision and the operation stability of the precision centrifuge.
The technical solution of the invention is as follows: the utility model provides a high accuracy precision centrifuge dynamic balance adjusting device, by fine motion adjusting device, join in marriage balancing unit, level crossing, prism subassembly, high-speed collection light pipe, light pipe support and constitute its characterized in that: the utility model provides a high accuracy precision centrifuge dynamic balance adjusting device need install on centrifuge's mesa, the design has two identical fine motion adjusting device, be located the X direction and the Y direction of centrifuge mesa respectively, the other end in same direction installation one with fine motion adjusting device wait the quality join in marriage balanced piece, with fine motion device with main shaft symmetric distribution, a level crossing is installed at the mesa center, a prism subassembly and high-speed collection light pipe are placed to the mesa top, be used for monitoring real-time positional information, and the data of gathering feeds back. And processing data according to the data obtained by feedback to obtain the precision of the rotation error, controlling a motor assembly in the micro-motion device to rotate according to the magnitude of the error value, driving a slide rod to rotate by the rotation of a motor, connecting the slide rod with a slide block through a thread, and driving the slide block to move in the linear direction by the slide rod. The slider can influence the focus position of mesa at the position of difference to can make the system reach dynamic balance state, compensate gyration error, improve system's precision.
The principle of the scheme is as follows: the accuracy errors of the centrifuge system mainly come from the installation radius, the static pitching misalignment angle, the static azimuth misalignment angle, the dynamic balance and the rotating speed of the centrifuge. When the centrifugal machine runs at a high speed, the influence of errors caused by dynamic balance factors is large, the rotation precision of the main shaft is poor due to the action of the dynamic balance on the shaft, the rotation error is increased, and the installation radius, the static pitching misalignment angle and the static azimuth misalignment angle are influenced by fluctuation, so that the system precision and the stability of the centrifugal machine are influenced. The invention realizes the real-time adjustment of the dynamic balance of the precision centrifuge by installing the micro-adjusting device and the rotation precision acquisition system on the table-board, compensates the rotation precision error and further improves the precision and the stability of the precision centrifuge.
The micro-motion adjusting device comprises a motor component, a micro-motion sliding block, a micro-motion switch, a sliding rod, a box body, a housing, a cover plate and the like. Motor element installs in the micro-motion device left side, and the motor shaft links to each other with the slide bar, and is fixed through fastening screw between the two, can drive the slide bar when the motor operation and rotate, links to each other through the screw thread between slider and the slide bar, and the rotation of slide bar drives the slider and carries out linear motion, adjusts micro-motion device's focus position through the position of adjusting the micro-motion slider. The slide bar is close to the motion track end and is equipped with two micro-gap switches, distributes in the left and right sides, plays the electrical protection effect, and when micro-gap slider and micro-gap switch contact, the automatic control power supply who cuts off motor element of system when avoiding micro-gap slider to move the unable continuation motion in track end, appears motor element phenomenon of burning out.
The balancing device is a mass block, the inching adjusting device and the like, and two balancing devices and the inching adjusting device are symmetrically distributed in the X direction and the Y direction of the table board of the centrifuge. The device has the function of ensuring that the center of mass and the center of gravity of the table top of the centrifuge coincide at the center of the circle of the table top, so that the table top is in a dynamic balance state and does not generate an eccentric phenomenon when the working states of the X-direction micro-motion device and the Y-direction micro-motion device are completely consistent.
The plane mirror is used for assisting the high-speed acquisition light tube to acquire real-time position error information, is arranged at the central position of the table board, rotates the main shaft, and adjusts the mirror surface to be vertical to the main shaft. A prism assembly is mounted above the flat mirror and used in conjunction with the light pipe to measure positional information.
The high-speed acquisition light tube is a photoelectric autocollimator which can acquire data rapidly and has high acquisition frequency, and can sample and transmit the position information of the centrifuge in real time through the plane mirror. In the actual working process, the light pipe and the base of the measured shaft need to be placed on the same horizontal vibration isolation basis, the photoelectric autocollimator can obtain readings Wxi of X direction of horizontal coordinates at each corresponding angular position and readings Wyi of Y direction of vertical coordinates of the light pipe at each corresponding angular position in the working process, measured values Wxi and Wyi are periodic functions of the angular position of the measured shaft, the periodic functions are respectively expanded into Fuji series, zero order and first harmonic components caused by zero position of the photoelectric autocollimator and installation error of a plane mirror are deducted from the periodic functions, two orthogonal components delta Wyi and delta Wxi of inclination angle rotation error are obtained, and the calculated rotation error is as follows:
the high-speed acquisition light tube transmits acquired position information to the control computer, the computer processes the position information to obtain the rotation precision of a real-time position, so that a rotation error is obtained, the motion mode of the micromotion block of the micromotion device in the X and Y directions can be determined according to the obtained rotation error, the rotation mode is converted into the control quantity of the motor, the control quantity is transmitted to the motor in the micromotion device through a sliding ring (a motor wire is connected with the sliding ring), the motor is driven to rotate to drive the micromotion block to move in the X axis or Y axis direction, and the micromotion block stops after reaching a specified position, so that the system is maintained in a dynamic balance state, the compensation of the rotation error is realized, and the system precision and the stability of.
The device compensates the rotation precision error of the high-speed operation of the precision centrifuge, changes the unbalanced state of the centrifuge through the movement of the micro-motion device in the X and Y directions, realizes dynamic balance adjustment, and improves the system precision and stability of the precision centrifuge. The device has the advantages of reasonable structural design, low cost, simple and convenient working mode, easy realization, good practicability and applicability and important engineering practical value.
Drawings
Fig. 1 is a schematic diagram of a dynamic balance adjusting device of a high-precision precise centrifuge.
Fig. 2 is a schematic structural diagram of a micro-motion device in the dynamic balance adjustment device of the high-precision precise centrifuge.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a dynamic balance adjustment device of a high-precision precise centrifuge according to the present invention. The dynamic balance regulator for high-precision centrifugal machine consists of fine regulator, balance device, plane mirror, prism assembly, high-speed light collecting tube, light tube support, etc.
The micromotion device, the balancing device and the plane mirror are arranged on a table board of the centrifuge, the two micromotion devices have the same structure and are distributed in the X direction and the Y direction of the table board, and the balancing device is positioned opposite to the micromotion devices and also on the X axis and the Y axis. The prism assembly and the high-speed collecting light tube are arranged above the table top and used for measuring the current angular position information and carrying out transmission processing to obtain the rotation error.
The structure diagram of the micro-motion device is shown in fig. 2, and the micro-motion adjusting device comprises a motor assembly, a micro-motion slider, a micro-motion switch, a slide rod, a box body, a cover shell, a cover plate and the like. Motor element installs in the micro-motion device left side, and the motor shaft links to each other with the slide bar, and is fixed through fastening screw between the two, can drive the slide bar when the motor operation and rotate, links to each other through the screw thread between slider and the slide bar, and the rotation of slide bar drives the slider and carries out linear motion, adjusts micro-motion device's focus position through the position of adjusting the micro-motion slider. The slide bar is close to the motion track end and is equipped with two micro-gap switches, distributes in the left and right sides, plays the electrical protection effect, and when micro-gap slider and micro-gap switch contact, the automatic control power supply who cuts off motor element of system when avoiding micro-gap slider to move the unable continuation motion in track end, appears motor element phenomenon of burning out. The motor assembly in the micro-motion device can perform corresponding rotary motion through input signals, drive the micro-motion slide block to move to a corresponding position, and stop moving after balance is achieved.
When the precision centrifuge works stably, a rotation error exists in a rotating shaft system due to the action of dynamic balance on a shaft. The method comprises the steps of acquiring data in real time through a high-speed acquisition light tube, acquiring real-time angular position information, calculating a rotation error of a shaft system, calculating the amount of change of the gravity center of a table board according to the obtained rotation error, converting the amount of change into linear motion of micro-motion sliders in two micro-motion devices of the table board in the X-axis direction and the Y-axis direction, determining the amount of control quantity required for a motor assembly according to the displacement motion required by the micro-motion sliders, finally controlling the motion of the micro-motion sliders through controlling the motor assembly to enable the micro-motion sliders to move to the position capable of enabling the table board of the centrifugal machine to reach a dynamic balance state, stopping the motion of the micro-motion sliders after the stable state is reached, and ensuring that the centrifugal machine maintains stable operation in the current state, thereby improving the system precision of.
Claims (7)
1. The utility model provides a high accuracy precision centrifuge dynamic balance adjusting device which characterized in that: the device comprises a micro-motion device (1), a balancing device (2), a plane mirror (3), a prism assembly (4), a photoelectric autocollimator (5) and a light pipe bracket (6). The precision and the stability of the system are improved by monitoring the rotation error of the centrifuge in real time and compensating the error.
2. The micro-motion device (1) according to claim 1, characterized in that: comprises a microswitch (7), a motor component (8), a slide block (9), a slide rod (10), a box body (11), a housing (12) and a cover plate (13). Two micro-motion devices with the same structure are arranged and distributed in the X-axis direction and the Y-axis direction of the table board.
3. Microswitch (7) according to claim 2, characterized in that: the automatic control device comprises two travel switches which are distributed on two sides of a micro-motion device, when a sliding block is in contact with the micro-motion switch, a control power supply of a motor is cut off, and the motor is prevented from being burnt out when the sliding block is in contact with the end of a linear motion track and cannot move.
4. The motor assembly (8), the slider (9), the sliding bar (10) according to claim 2, characterized in that: the motor component (8) comprises a servo motor component, the servo motor component is fixed with the sliding rod (10) through a fastening screw, the position of the sliding block (9) is controlled through the rotary motion of the motor, and a motor wire is connected into the sliding ring of the table body through a connector on the table top. The sliding block (9) is connected with the sliding rod (10) through threads, and the structure can convert the rotary motion of the motor into the linear motion of the sliding block and control the position of the sliding block. The material of the sliding block (9) is 45 steel, most of the mass of the micro-motion device is integrated, and the position of the mass center of the micro-motion device can be changed.
5. -box (11), casing (12), cover plate (13) according to claim 2, characterized in that: for the frame construction of micro-motion device, the material adopts 2A12 aluminum alloy, and the texture is lighter, and density is less, integrates whole micro-motion device into a confined structure, is difficult for receiving the influence of external disturbance factor.
6. Balancing device (2) according to claim 1, characterized in that: a solid balancing weight is used for balancing operation when the system is static, a threaded hole is formed in the solid balancing weight, and the corresponding balancing weight can be added to adjust the mass of the balancing device.
7. The planar mirror (3), the prism assembly (4), the photoelectric autocollimator (5), the light pipe support (6) according to claim 1, wherein: the device is a detection element of the position information of the centrifuge, the position information is detected by a photoelectric autocollimator, the position information of the centrifuge is sampled and transmitted, the photoelectric autocollimator is placed on a light pipe bracket, and the photoelectric autocollimator and a base of a shaft to be detected need to be placed on the same horizontal vibration isolation basis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910685291.5A CN112284618A (en) | 2019-07-27 | 2019-07-27 | Dynamic balance adjusting device of high-precision precise centrifuge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910685291.5A CN112284618A (en) | 2019-07-27 | 2019-07-27 | Dynamic balance adjusting device of high-precision precise centrifuge |
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| CN112284618A true CN112284618A (en) | 2021-01-29 |
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| CN201910685291.5A Pending CN112284618A (en) | 2019-07-27 | 2019-07-27 | Dynamic balance adjusting device of high-precision precise centrifuge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203522A (en) * | 2021-05-07 | 2021-08-03 | 中国航空工业集团公司北京长城计量测试技术研究所 | Dynamic balance control system and method for rotary machine |
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| CN101912825A (en) * | 2010-08-02 | 2010-12-15 | 浙江大学 | Two-axial adaptive dynamic balance execution device for centrifuge |
| CN101915640A (en) * | 2010-08-02 | 2010-12-15 | 浙江大学 | Biaxial adaptive dynamic balance executing method for centrifuge |
| CN101949752A (en) * | 2010-08-02 | 2011-01-19 | 浙江大学 | Triaxial adaptive dynamic-balance execution device for centrifuger |
| CN104748913A (en) * | 2015-04-09 | 2015-07-01 | 哈尔滨工业大学 | Double freedom degree precision centrifuge spindle dynamic unbalance scale identification method based on micro displacement sensor |
| CN109520446A (en) * | 2018-12-14 | 2019-03-26 | 中国航空工业集团公司北京长城航空测控技术研究所 | A kind of measurement method of revolution at a high speed shafting dynamic inclination error |
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2019
- 2019-07-27 CN CN201910685291.5A patent/CN112284618A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912825A (en) * | 2010-08-02 | 2010-12-15 | 浙江大学 | Two-axial adaptive dynamic balance execution device for centrifuge |
| CN101915640A (en) * | 2010-08-02 | 2010-12-15 | 浙江大学 | Biaxial adaptive dynamic balance executing method for centrifuge |
| CN101949752A (en) * | 2010-08-02 | 2011-01-19 | 浙江大学 | Triaxial adaptive dynamic-balance execution device for centrifuger |
| CN104748913A (en) * | 2015-04-09 | 2015-07-01 | 哈尔滨工业大学 | Double freedom degree precision centrifuge spindle dynamic unbalance scale identification method based on micro displacement sensor |
| CN109520446A (en) * | 2018-12-14 | 2019-03-26 | 中国航空工业集团公司北京长城航空测控技术研究所 | A kind of measurement method of revolution at a high speed shafting dynamic inclination error |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203522A (en) * | 2021-05-07 | 2021-08-03 | 中国航空工业集团公司北京长城计量测试技术研究所 | Dynamic balance control system and method for rotary machine |
| CN113203522B (en) * | 2021-05-07 | 2022-08-09 | 中国航空工业集团公司北京长城计量测试技术研究所 | Dynamic balance control system and method for rotary machine |
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Application publication date: 20210129 |