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CN106989853B - A micro-torque tester - Google Patents

A micro-torque tester Download PDF

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Publication number
CN106989853B
CN106989853B CN201710311725.6A CN201710311725A CN106989853B CN 106989853 B CN106989853 B CN 106989853B CN 201710311725 A CN201710311725 A CN 201710311725A CN 106989853 B CN106989853 B CN 106989853B
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measurement
shaft
fixed
measuring
torque
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CN106989853A (en
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赵建辉
徐贺
徐帆
李帆
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Emercys Electronics Co ltd
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Beihang University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

The invention discloses a kind of micro- torque testers, are related to torsion-testing technical field, which includes: construction module and measurement module；The construction module includes structural framing and axial displacement control mechanism, and the axial displacement control mechanism is used to control the axial displacement of measurement axis, realizes the axial suspension of measurement axis；The measurement module includes angle displacement measurement component and torque drive component；Above-mentioned technical proposal of the invention has the advantages that the micro- torque tester performance is stablized, measuring accuracy it is high, it can be achieved that slight torque measurement.

Description

A kind of micro- torque tester
Technical field
The present invention relates to torsion-testing technical field, in particular to a kind of micro- torque tester.
Background technique
Micro- torque tester be a kind of contactless torque measuring instrument, it can be achieved that slight torque measurement.Micro- torque measuring Examination instrument can be used for the measurement of the thrombus elastic force in hemorheology, to monitor the variation of thrombus elastic force in blood sample coagulation process. Micro- torque tester can also be used in the average torque and maximum moment in staring torque and operational process when test bearing starts.
The measurement that present most of torque tester makes it can not achieve slight torque due to itself in the presence of friction, detection Precision is not high, and detection function is single.
Summary of the invention
The technical problem to be solved in the present invention are as follows: in order to realize the measurement of slight torque, a kind of micro- torque tester is provided, It is not high to solve detection accuracy, the single problem of detection function.
The present invention solves the technical solution that above-mentioned technical problem uses are as follows: a kind of micro- torque tester, including construction module And measurement module；
Construction module includes structural framing and axial displacement control mechanism, and the axial displacement control mechanism is surveyed for controlling The axial displacement of axis is measured, realizes the axial suspension of measurement axis；The structural framing for be fixedly mounted axial displacement control mechanism, Angle displacement measurement component and torque drive component；
Measurement module includes angle displacement measurement component and torque drive component；The angle displacement measurement component is surveyed for measuring Measure the rotational angle of axis；The torque drive component carrys out external influence suffered by offset measurement axis for generating reaction torque Power makes measurement axis keep angular displacement constant；
The structural framing includes axle sleeve and outer magnetic ring, and two of them outer magnetic ring is fixed in axle sleeve by interference fit Portion；
The axial displacement control mechanism includes measurement axis, internal magnetic ring, electromagnet, armature, position sensor, baffle, limit Position baffle；
The armature is fixed on the upper end of measurement axis by holding screw, and two internal magnetic rings are fixed on by interference fit The middle part of axis is measured, position sensor is fixed by screws in electromagnet upper end, and electromagnet is fixed by screws in axle sleeve Upper end；
Two outer magnetic rings on two internal magnetic rings and axle sleeve on the measurement axis make to survey by coaxial and eccentric cooperation Amount axis radial suspension simultaneously makes to measure the axis axial force downward by one, electromagnet and the measurement axis upper end of axle sleeve upper end The axial force that armature keeps measurement axis upward by one carrys out the downward axial force that balancing a survey axis is subject to, downward Axial force includes the gravity that the power axially downwardly of interior outer magnetic ring bias cooperation generation is subject to measurement axis, binding site sensor The electromagnetic force size of metrical information regulating magnet make to measure axis axially loaded and balance remain stationary always；Matched by above Conjunction and control can realize five freedom degrees of limitation measurement axis, and only there are the axial-rotation freedom degrees of measurement axis；
The baffle is fixed on the lower part of measurement axis by holding screw, and postive stop baffle is fixed by screws under axle sleeve End, baffle and postive stop baffle play the role of mechanical position limitation with the use of the shaft orientation moving range of limitation measurement axis.
The angle displacement measurement component includes code-disc, code-disc bracket, measuring circuit plate；
The code-disc is fixed on code-disc bracket, and code-disc bracket is fixed on the top of measurement axis, and measuring circuit plate passes through spiral shell Nail is fixed on the top of axle sleeve, is welded with encoder chip in measuring circuit plate；It is fixed on axle sleeve measuring circuit plate and is fixed on Code-disc on measurement axis is used cooperatively the angular displacement for measuring measurement axis.
The torque drive component includes rotor magnet and stator winding；
The rotor magnet is fixed on the middle part of measurement axis, and stator winding is fixed on axle sleeve；According to angle displacement measurement group The size and Orientation that the angular displacement information that part provides adjusts the driving current of stator winding makes measurement axis keep angular displacement constant；It is fixed With the use of can produce a certain amount of torque effect to measure on axis, this torque is used for balancing a survey for sub- winding and rotor magnet It is motionless that the extraneous torque that axis is subject to remain stationary measurement axis, reads over the measurement to the driving current of stator winding and realizes micro- torque Measurement.
Above-mentioned technical proposal of the invention has the advantages that performance is stablized, and detection accuracy is high, easy to operate；It can be achieved The measurement of slight torque.This instrument eliminates the moment of friction in operational process itself using magnetic suspension structure support, can transmit Slight torque；Using closed-loop measuring principle, it is high-precision that torque cooperation to be measured is balanced by actively generating a torque Encoder remains unchanged the axial angular displacement for measuring axis using closed-loop control, and height can be achieved in the variation by measuring driving current The torque measurement of precision.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to micro- torque tester of the embodiment of the present invention；
Fig. 2 is the appearance schematic diagram according to micro- torque tester of the embodiment of the present invention；
Appended drawing reference meaning in figure are as follows: 1: axle sleeve；2: the first outer magnetic rings；3: the first internal magnetic rings；4: measurement axis；5: rotor magnetic Iron；6: stator winding；7: the second outer magnetic rings；8: the second internal magnetic rings；9: position sensor；10: electromagnet；11: armature；12: surveying Measure circuit board；13: code-disc；14: code-disc bracket；15: baffle；16: postive stop baffle.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail, implements below Example is not intended to limit the scope of the invention for illustrating the present invention.
As shown in Figure 1, the embodiment of the present invention provides a kind of micro- torque tester, including construction module and measurement module.
Construction module include axle sleeve 1, the first outer magnetic ring 2, the first internal magnetic ring 3, measurement axis 4, in the second outer magnetic ring 7, second Magnet ring 8, position sensor 9, electromagnet 10, armature 11, baffle 15 and postive stop baffle 16.
Measurement module includes rotor magnet 5, stator winding 6, measuring circuit plate 12, code-disc 13, code-disc bracket 14.
Axle sleeve 1 and the first outer magnetic ring 2, the second outer magnetic ring 7 constitute structural framing, and the first outer magnetic ring 2, the second outer magnetic ring 7 are 1 middle part of axle sleeve is fixed on by interference fit.
Measure axis 4, the first internal magnetic ring 3, the second internal magnetic ring 8, position sensor 9, electromagnet 10, armature 11, baffle 15, limit Position baffle 16 together constitutes axial displacement control mechanism；
Armature 11 is fixed on the upper end of measurement axis 4 by holding screw, and the first internal magnetic ring 3, the second internal magnetic ring 8 pass through Interference fit is fixed on the middle part of measurement axis 4, and position sensor 9 is fixed by screws in 10 upper end of electromagnet, electromagnet 10 It is fixed by screws in the upper end of axle sleeve 1；
The first internal magnetic ring 3, the second internal magnetic ring 8 on measurement axis 4 and the first outer magnetic ring 2, the second outer magnetic ring 7 on axle sleeve 1 Make to measure 4 radial suspension of axis and making by coaxial and eccentric cooperation and measure the axial force downward by one of axis 4, on axle sleeve 1 The axial force that the electromagnet 10 of end and the armature 11 of measurement 4 upper end of axis keep measurement axis 4 upward by one is come The downward axial force that balancing a survey axis 4 is subject to, downward axial force include the first internal magnetic ring 3, outside the second internal magnetic ring 8, first The gravity that the power axially downwardly and measurement axis 4 that the interior outer magnetic ring bias cooperation of magnet ring 2, the second outer magnetic ring 7 generates are subject to, in conjunction with It is quiet that the electromagnetic force size of the metrical information regulating magnet 10 of position sensor 9 makes measurement 4 axially loaded of axis balance holding always Only；Five freedom degrees of limitation measurement axis 4 can be realized by above cooperation and control, only there are the axial directions of measurement axis 4 Rotary freedom；
Baffle 15 is fixed on the lower part of measurement axis 4 by holding screw, and postive stop baffle 16 is fixed by screws in axle sleeve 1 Lower end, baffle 15 and postive stop baffle 16 play the role of mechanical position limitation with the use of the shaft orientation moving range of limitation measurement axis 4.
Measuring circuit plate 12, code-disc 13, code-disc bracket 14 collectively form angle displacement measurement component；
Code-disc 13 is fixed on code-disc bracket 14, and code-disc bracket 14 is fixed on the top of measurement axis 4, and measuring circuit plate 12 is logical The top that screw is fixed on axle sleeve 1 is crossed, is welded with encoder chip in measuring circuit plate 12；It is fixed on measuring circuit plate on axle sleeve 1 12 are used cooperatively the angular displacement for measuring measurement axis 4 with the code-disc 13 being fixed on measurement axis 4.
Rotor magnet 5 and stator winding 6 collectively form torque drive component；
Rotor magnet 5 is fixed on the middle part of measurement axis 4, and stator winding 6 is fixed on axle sleeve 1；According to angle displacement measurement group The size and Orientation that the angular displacement information that part provides adjusts the driving current of stator winding 6 makes measurement axis 4 keep angular displacement constant； Stator winding 6 and rotor magnet 5 are with the use of can produce a certain amount of torque effect to measure on axis 4, this torque is for putting down It is motionless that the extraneous torque that weighing apparatus measurement axis 4 is subject to remain stationary measurement axis 4, reads over the measurement of the driving current to stator winding 6 Realize the measurement of micro- torque.
Whole work process of the present invention is as follows:
S1. the axial displacement control mechanism for starting micro- torque tester floats measurement axle suspension, opens measurement module；
S2. torque to be measured is mounted on measurement axis, carries out the measurement of torque；
S3. measurement terminates, and unloads torque to be measured, closes measurement module and axial displacement control mechanism.
Above embodiments are provided just for the sake of the description purpose of the present invention, and are not intended to limit the scope of the invention.This The range of invention is defined by the following claims.It does not depart from spirit and principles of the present invention and the various equivalent replacements made and repairs Change, should all cover within the scope of the present invention.

Claims (1)

1.一种微扭矩测试仪，其特征在于：包括结构模块和测量模块；1. a micro-torque tester, characterized in that: comprising a structural module and a measurement module; 结构模块包括结构框架和轴向位移控制机构，所述轴向位移控制机构用于控制测量轴的轴向位移，实现测量轴的轴向悬浮；所述结构框架用于固定安装轴向位移控制机构、角位移测量组件和扭矩驱动组件；The structural module includes a structural frame and an axial displacement control mechanism, the axial displacement control mechanism is used to control the axial displacement of the measuring shaft and realize the axial suspension of the measuring shaft; the structural frame is used to fix and install the axial displacement control mechanism , Angular displacement measurement components and torque drive components; 测量模块包括角位移测量组件和扭矩驱动组件；所述角位移测量组件用于测量测量轴的转动角度；所述扭矩驱动组件用于产生反作用扭矩来抵消测量轴所受到的外界作用力，使测量轴保持角位移不变；The measurement module includes an angular displacement measurement assembly and a torque drive assembly; the angular displacement measurement assembly is used to measure the rotation angle of the measurement shaft; the torque drive assembly is used to generate a reaction torque to offset the external force on the measurement shaft, so that the measurement The axis keeps the angular displacement unchanged; 所述结构框架包括轴套和外磁环，其中两个外磁环通过过盈配合固定在轴套中部；The structural frame includes a shaft sleeve and an outer magnetic ring, wherein the two outer magnetic rings are fixed in the middle of the shaft sleeve through interference fit; 所述轴向位移控制机构包括测量轴、内磁环、电磁铁、衔铁、位置传感器、挡片、限位挡板；The axial displacement control mechanism includes a measuring shaft, an inner magnetic ring, an electromagnet, an armature, a position sensor, a stopper, and a limit stopper; 所述衔铁通过紧定螺钉固定在测量轴的上端部，两个内磁环通过过盈配合固定在测量轴的中部，位置传感器通过螺钉固定在电磁铁上端部，电磁铁通过螺钉固定在轴套的上端部；The armature is fixed on the upper end of the measuring shaft by the set screw, the two inner magnetic rings are fixed on the middle of the measuring shaft by the interference fit, the position sensor is fixed on the upper end of the electromagnet by the screw, and the electromagnet is fixed on the shaft sleeve by the screw. the upper end of ; 所述测量轴上的两个内磁环和轴套上的两个外磁环通过同轴并且偏心配合使测量轴径向悬浮并使测量轴受到一个向下的轴向力，轴套上端部的电磁铁与测量轴上端部的衔铁配合使用使测量轴受到一个向上的轴向力来平衡测量轴受到的向下的轴向力，向下的轴向力包括内外磁环偏心配合产生的轴向向下的力和测量轴受到的重力，结合位置传感器的测量信息调节电磁铁的电磁力大小使测量轴轴向受力始终平衡保持静止；通过以上的配合与控制便可以实现限制测量轴的五个自由度，只留有测量轴的轴向旋转自由度；The two inner magnetic rings on the measuring shaft and the two outer magnetic rings on the shaft sleeve are coaxially and eccentrically matched to make the measuring shaft radially suspend and subject the measuring shaft to a downward axial force. The electromagnet is used in conjunction with the armature on the upper end of the measuring shaft, so that the measuring shaft receives an upward axial force to balance the downward axial force on the measuring shaft. The downward axial force includes the shaft generated by the eccentric matching of the inner and outer magnetic rings. The downward force and the gravity on the measuring shaft, combined with the measurement information of the position sensor, adjust the electromagnetic force of the electromagnet so that the axial force of the measuring shaft is always balanced and static; Five degrees of freedom, leaving only the axial rotational degrees of freedom of the measuring shaft; 所述挡片通过紧定螺钉固定在测量轴的下部，限位挡板通过螺钉固定在轴套的下端部，挡片和限位挡板配合使用限制测量轴的轴向移动范围起到机械限位的作用；The baffle is fixed on the lower part of the measuring shaft by the set screw, and the limit baffle is fixed on the lower end of the shaft sleeve by the screw. the role of bits; 所述角位移测量组件包括码盘、码盘支架、测量电路板；The angular displacement measurement assembly includes a code disc, a code disc bracket, and a measurement circuit board; 所述码盘固定在码盘支架上，码盘支架固定在测量轴的上部，测量电路板通过螺钉固定在轴套的上部，测量电路板上焊有编码器芯片；固定在轴套上测量电路板与固定在测量轴上的码盘配合使用用于测量测量轴的角位移；The code disc is fixed on the code disc support, the code disc support is fixed on the upper part of the measuring shaft, the measuring circuit board is fixed on the upper part of the shaft sleeve by screws, and the encoder chip is welded on the measuring circuit board; the measuring circuit is fixed on the shaft sleeve The plate is used in conjunction with the code disc fixed on the measuring shaft to measure the angular displacement of the measuring shaft; 所述扭矩驱动组件包括转子磁铁和定子绕组；the torque drive assembly includes rotor magnets and stator windings; 所述转子磁铁固定在测量轴的中部，定子绕组固定在轴套上；根据角位移测量组件提供的角位移信息调节定子绕组的驱动电流的大小和方向使测量轴保持角位移不变；定子绕组和转子磁铁配合使用可以产生一定量的扭矩作用来测量轴上，此扭矩用于平衡测量轴受到的外界转矩使测量轴保持静止不动，通读对定子绕组的驱动电流的测量实现微扭矩的测量。The rotor magnet is fixed in the middle of the measuring shaft, and the stator winding is fixed on the shaft sleeve; the magnitude and direction of the driving current of the stator winding are adjusted according to the angular displacement information provided by the angular displacement measuring component to keep the angular displacement of the measuring shaft unchanged; Used in conjunction with the rotor magnet, a certain amount of torque can be generated to measure the shaft. This torque is used to balance the external torque received by the measurement shaft to keep the measurement shaft stationary, and read through the measurement of the driving current of the stator winding to achieve micro-torque. Measurement.
CN201710311725.6A 2017-05-05 2017-05-05 A micro-torque tester Active CN106989853B (en)

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CN109839058A (en) * 2017-11-24 2019-06-04 赫安仕科技（苏州）有限公司 A kind of contactless inductance type measurement angle device and its measurement method for thrombelastogram instrument
CN109372875A (en) * 2018-11-20 2019-02-22 中国航发贵州黎阳航空动力有限公司 A kind of big pressure nut of micro- torque

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