CN211538235U - 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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- CN211538235U CN211538235U CN201921567147.3U CN201921567147U CN211538235U CN 211538235 U CN211538235 U CN 211538235U CN 201921567147 U CN201921567147 U CN 201921567147U CN 211538235 U CN211538235 U CN 211538235U
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Abstract
The utility model relates to a dynamic balance adjusting device of high accuracy precision centrifuge for the gyration error compensation when high-speed operation to precision centrifuge. The device comprises a micro-motion device (1), a balancing device (2), a plane mirror (3), a prism assembly (4), a photoelectric autocollimator (5), a light pipe bracket (6) and the like. Two micro-motion devices (1) are arranged on a table board of the centrifuge and positioned in X and Y directions, balancing devices (2) are arranged opposite to the micro-motion devices (1) and symmetrically distributed along a main shaft, a plane mirror (3) is arranged in the center of the table board, and a prism assembly (4) and a photoelectric autocollimator (5) 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 of the utility model has the advantages of reasonable design, with low costs, the working method is simple and convenient, easily realizes, has fine practicality and suitability, has important engineering practical value.
Description
Technical Field
The utility model relates to a high accuracy precision centrifuge dynamic balance adjusting device, each subassembly reasonable in design of the device, reduced the real-time precision error that produces under the high-speed rotation state of precision centrifuge, very big improvement precision and stability when precision centrifuge high-speed operation.
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.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to design the utility model relates to a precision centrifugal machine dynamic balance device compensates precision error that precision centrifugal machine produced under high-speed running operating condition to improve precision centrifugal machine's dynamic precision and operating stability.
The technical solution of the utility model is that: the utility model provides a high accuracy precision centrifuge dynamic balance adjusting device, by micro-motion device (1), join in marriage balancing unit (2), level crossing (3), prism subassembly (4), photoelectricity autocollimator (5), light pipe support (6) 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 micro-motion device (1), X direction and the Y direction that is located the centrifuge mesa respectively, the balancing unit that joins in marriage of quality such as one and micro-motion device (1) is installed to the other end in same direction, with micro-motion device (1) with main shaft symmetric distribution, a level crossing (3) is installed at the mesa center, a prism subassembly (4) and photoelectricity autocollimator (5) are placed to the mesa top, a real-time positional information is used for monitoring, and data acquisition carries out the feedback. And data processing is carried out according to the data obtained by feedback to obtain the precision of the rotation error, a motor component (8) in the micro-motion device (1) is controlled to rotate according to the magnitude of the error value, the motor rotates to drive a sliding rod (10) to rotate, the sliding rod (10) is connected with a sliding block (9) through threads, and the sliding rod (10) drives the sliding block (9) to move in the linear direction. The slide block (9) is arranged at different positions and can influence the gravity center position of the table board, so that the system can reach a dynamic balance state, the rotation error is compensated, and the system precision is improved.
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 utility model discloses a realize the real-time adjustment to accurate centrifuge dynamic balance at mesa installation micro-motion device (1) and gyration precision acquisition system, compensate gyration precision error, and then improve accurate centrifuge's precision and stability.
The micro-motion device (1) comprises a micro-motion switch (7), a motor component (8), a slide block (9), a slide rod (10), a box body (11), a cover shell (12), a cover plate (13) and the like. Motor element (8) are installed in micro-motion device (1) left side, and motor element (8) link to each other with slide bar (10), and fixed through fastening screw between the two, can drive slide bar (10) and rotate during the motor operation, link to each other through the screw between slider (9) and slide bar (10), and the rotation of slide bar (10) drives slider (9) and carries out linear motion, adjusts the focus position of micro-motion device (1) through the position of adjusting slider (9). The sliding rod (10) is provided with two micro-switches (7) close to the end of the moving track and distributed on the left side and the right side to achieve an electric protection effect, when the sliding block (9) is in contact with the micro-switches (7), a system automatically cuts off a control power supply of the motor assembly (8), and the phenomenon that the motor assembly (8) is burnt out when the sliding block (9) moves to the end of the track and cannot move continuously is avoided.
The balancing device (2) is a mass block, has the same mass as the micro-motion device (1), and is provided with two balancing devices (2) which are symmetrically distributed in the X direction and the Y direction of the table board of the centrifuge with the micro-motion device (1). 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 (3) is used for assisting the photoelectric autocollimator (5) to collect real-time position error information, the plane mirror (3) is installed at the center of the table top, the main shaft is rotated, and the adjusting mirror surface is perpendicular to the main shaft. A prism assembly (4) is mounted above the flat mirror and used with the light pipe to measure positional information.
The photoelectric autocollimator (5) is a kind of photoelectric autocollimator which can quickly collect data and has high collection frequency, and can sample and transmit the position information of the centrifuge in real time through the plane mirror (3). 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 (5) can obtain readings Wxi of the X direction of the horizontal coordinate at each corresponding angular position and readings Wyi of the Y direction of the vertical coordinate of the light pipe at each corresponding angular position, the measured values Wxi and Wyi are periodic functions of the angular position of the measured shaft, the periodic functions are respectively expanded into a Fourier series, and zero and one times caused by installation errors of the zero position of the photoelectric autocollimator (5) and the plane mirror (3) are deducted from the periodic functionsHarmonic components, resulting in two orthogonal components Δ Wyi and Δ Wxi of the tilt gyration error, the calculated gyration error being:
the photoelectric autocollimator (5) transmits the collected position information to a control computer, the computer processes the position information to obtain the rotation precision of a real-time position, thereby obtaining a rotation error, the motion mode of a slider of the micro-motion device (1) in the X and Y directions can be determined according to the obtained rotation error, the rotation error is converted into the control quantity of a motor, the control quantity is transmitted to a motor component (8) in the micro-motion device (1) through a sliding ring (a motor wire is connected with the sliding ring), the motor is driven to rotate to drive the slider to move in the X axis or the Y axis direction, and the slider 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.
The utility model discloses the device has compensated high-speed moving gyration precision error of precision centrifuge, through micro-motion device at X and the ascending removal of Y side, changes centrifuge's unbalanced state, realizes the dynamic balance adjustment to precision centrifuge's system precision and stability have been improved. The device of the utility model has the advantages of reasonable design, with low costs, the working method is simple and convenient, easily realizes, has fine practicality and suitability, has important engineering practical value.
Drawings
Fig. 1 is a schematic view of the dynamic balance adjustment device of the high-precision centrifuge of the present invention.
Fig. 2 is the structure schematic diagram of the micro-motion device in the dynamic balance adjustment device of the high-precision centrifuge.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, it is a schematic structural diagram of a dynamic balance adjustment device of a high-precision centrifuge. The dynamic balance adjusting device of the high-precision centrifugal machine comprises a micro-motion device (1), a balance matching device (2), a plane mirror (3), a prism assembly (4), a photoelectric autocollimator (5), a light pipe bracket (6) and the like.
The micro-motion device (1), the balancing device (2) and the plane mirror (3) are arranged on a table board of the centrifuge, the two micro-motion devices (1) have the same structure and are distributed in the X direction and the Y direction of the table board, and the balancing device (2) is positioned opposite to the micro-motion device (1) and also on the X axis and the Y axis. The prism assembly (4) and the photoelectric autocollimator (5) are arranged above the table top and used for measuring current angular position information and carrying out transmission processing to obtain a rotation error.
The structure diagram of the micro-motion device (1) is shown in fig. 2, and the micro-motion adjusting device (1) comprises a micro-motion switch (7), a motor component (8), a slide block (9), a slide rod (10), a box body (11), a cover shell (12), a cover plate (13) and the like. Motor element (8) are installed in micro-motion device (1) left side, and the motor shaft links to each other with slide bar (10), and is fixed through fastening screw between the two, can drive slide bar (10) and rotate during the motor operation, links to each other through the screw between slider (9) and slide bar (10), and the rotation of slide bar (10) drives slider (9) and carries out linear motion, adjusts micro-motion device (1)'s focus position through the position of adjusting slider (9). The sliding rod (10) is provided with two micro switches (7) close to the end of the moving track and distributed on the left side and the right side to achieve an electric protection effect, when the micro slider (9) is in contact with the micro switches (7), a system automatically cuts off a control power supply of the motor assembly (8), and the phenomenon that the motor assembly (8) is burnt out when the slider (9) moves to the end of the track and cannot move continuously is avoided. A motor component (8) in the micro-motion device (1) can perform corresponding rotary motion through input signals, drive the sliding block (9) 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 photoelectric autocollimator (5) collects data in real time to obtain real-time angular position information, and the rotation error of the shafting is obtained by calculation, the amount of the change of the gravity center of the table top is calculated according to the obtained rotation error and converted into the linear motion of the sliding blocks (9) in the two micro-motion devices (1) of the table top in the X-axis and Y-axis directions, the size of the control quantity required to be given to the motor component (8) is determined according to the displacement motion required to be made by the slide block (9), the movement of the slide block (9) is finally controlled by controlling the motor component (8) to move to a position which can enable the table top of the centrifuge to reach a dynamic balance state, when the stable state is reached, the slide block (9) stops moving to ensure that the centrifuge keeps the stable operation in the current state, therefore, the system precision of the precision centrifugal machine is improved, and the precision influence caused by the rotation error is reduced.
Claims (7)
1. The utility model provides a high accuracy precision centrifuge dynamic balance adjusting device, includes micro-motion device (1), joins in marriage balancing unit (2), level crossing (3), prism subassembly (4), photoelectricity autocollimator (5), light pipe support (6), its characterized in that: 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 dynamic balance adjustment device of the high-precision centrifugal machine according to claim 1, characterized in that: the micro-motion device (1) comprises a micro-motion switch (7), a motor component (8), a slide block (9), a slide rod (10), a box body (11), a cover shell (12) and a cover plate (13), and is provided with two micro-motion devices with the same structure which are distributed in the X-axis direction and the Y-axis direction of the table board.
3. The dynamic balance adjustment device of the high-precision centrifugal machine according to claim 2, characterized in that: the micro switch (7) comprises two travel switches which are distributed on two sides of the micro device, when the sliding block is in contact with the micro switch, a control power supply of the motor is cut off, and the motor is prevented from being burnt out when the sliding block is in contact with the end of the linear motion track and cannot move.
4. The dynamic balance adjustment device of the high-precision centrifugal machine according to claim 2, characterized in that: motor element (8) include a servo motor element, fix through fastening screw and slide bar (10), the rotary motion through the motor comes the position of control slider (9), the motor line passes through the connector on the mesa and inserts in the middle of the stage body sliding ring, through threaded connection between slider (9) and slide bar (10), this structure can convert the rotary motion of motor into the linear motion of slider, control slider's position, 45 steel are chooseed for use to slider (9) material, micro-motion device's most quality has been integrated, can change micro-motion device's barycenter position.
5. The dynamic balance adjustment device of the high-precision centrifugal machine according to claim 2, characterized in that: the box (11), the housing (12) and the cover plate (13) are of a frame structure of the micro-motion device, 2A12 aluminum alloy is adopted as a material, the whole micro-motion device is integrated into a closed structure, and the influence of external interference factors is not easy to affect.
6. The dynamic balance adjustment device of the high-precision centrifugal machine according to claim 1, characterized in that: the balancing device (2) comprises a solid balancing weight which is used for balancing operation when the system is static, a threaded hole is formed in the balancing weight, and the mass of the balancing device can be adjusted by adding the balancing weight.
7. The dynamic balance adjustment device of the high-precision centrifugal machine according to claim 1, characterized in that: the plane mirror (3), the prism assembly (4), the photoelectric autocollimator (5) and the light pipe support (6) are detection elements of the position information of the centrifuge, the position information is detected by the photoelectric autocollimator, the position information of the centrifuge is sampled and transmitted, the photoelectric autocollimator is placed on the light pipe support, and the light pipe support and the measured shaft base need to be placed on the same horizontal vibration isolation basis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921567147.3U CN211538235U (en) | 2019-09-20 | 2019-09-20 | Dynamic balance adjusting device of high-precision precise centrifuge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921567147.3U CN211538235U (en) | 2019-09-20 | 2019-09-20 | Dynamic balance adjusting device of high-precision precise centrifuge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112718265A (en) * | 2020-12-15 | 2021-04-30 | 中国航空工业集团公司北京长城计量测试技术研究所 | Anti-disturbance precision centrifugal machine device |
| CN112718267A (en) * | 2020-12-15 | 2021-04-30 | 中国航空工业集团公司北京长城计量测试技术研究所 | Anti-disturbance self-balancing precision centrifuge device |
| CN112718266A (en) * | 2020-12-15 | 2021-04-30 | 中国航空工业集团公司北京长城计量测试技术研究所 | Automatic realize centrifuge device of dynamic balance regulation |
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2019
- 2019-09-20 CN CN201921567147.3U patent/CN211538235U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112718265A (en) * | 2020-12-15 | 2021-04-30 | 中国航空工业集团公司北京长城计量测试技术研究所 | Anti-disturbance precision centrifugal machine device |
| CN112718267A (en) * | 2020-12-15 | 2021-04-30 | 中国航空工业集团公司北京长城计量测试技术研究所 | Anti-disturbance self-balancing precision centrifuge device |
| CN112718266A (en) * | 2020-12-15 | 2021-04-30 | 中国航空工业集团公司北京长城计量测试技术研究所 | Automatic realize centrifuge device of dynamic balance regulation |
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