CN111649853A - Micro-torque measuring device based on torque sensor - Google Patents
Micro-torque measuring device based on torque sensor Download PDFInfo
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- CN111649853A CN111649853A CN202010572789.3A CN202010572789A CN111649853A CN 111649853 A CN111649853 A CN 111649853A CN 202010572789 A CN202010572789 A CN 202010572789A CN 111649853 A CN111649853 A CN 111649853A
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- 238000000034 method Methods 0.000 description 9
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- 238000013461 design Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
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- 238000005859 coupling reaction Methods 0.000 description 6
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- 238000006243 chemical reaction Methods 0.000 description 3
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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
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Abstract
The invention discloses a micro-torque measuring device based on a torque sensor, which comprises a cubic case consisting of an upper panel, a lower panel, a left panel, a right panel, a front panel and a rear panel, wherein the front panel is provided with a pressure gauge and an air pressure adjusting valve hole, the right panel is provided with an air pressure quick joint and an aviation plug, the middle part of the upper panel is provided with a measuring table, and the measuring table is used for fixing an output shaft of a motor to be measured; the upper surface of the upper panel is also provided with a horizontal bubble, the lower surface of the upper panel is provided with a sleeve, an aerostatic bearing, a coupler, a torque sensor and a locking fixing device are sequentially arranged in the sleeve from top to bottom, the top end of the aerostatic bearing is connected with the measuring table, the aerostatic bearing and the torque sensor are connected with each other through the coupler, a top screw for fixing the torque sensor is arranged in the locking fixing device, and the bottom of the locking fixing device is fixedly connected with the bottom of the sleeve.
Description
Technical Field
The invention belongs to the field of torque measurement, and particularly relates to a micro-torque measuring device based on a torque sensor.
Background
Dynamic performance parameters such as gyroscope motor reaction moment, motor interference moment, ripple moment and the like are important indexes for measuring the performance of the motor, and at present, the traditional micro-moment measuring device mainly adopts a force balance measuring method and a strain type measuring method. The force balance measurement method is that the measured torque is loaded on the transmission shaft, the torquer applies counter torque to the transmission shaft according to the angle change generated by the angle sensor to balance the transmission shaft, and the measured torque can be obtained by measuring the driving current; the method is simple and visual, but the measurement accuracy mainly depends on the measurement accuracy of the sensor, the danger of overload damage exists in the use process, meanwhile, the transmission shaft and the measurement shaft need to be ensured to have higher coaxiality, the processing and installation difficulty is higher, the anti-interference capability is poor, and the method has larger limitation in use.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a micro-torque measuring device based on a torque sensor, which is used for measuring the reaction torque of a gyroscope motor, the interference torque of the motor and the ripple torque and can realize the torque measurement in the directions of x, y and z. In order to improve the torque measurement precision, a design scheme of fixing one end of a torque sensor is adopted, and a design invention is made on the structure of a shaft at one end of a locking sensor; the measuring table is provided with a self-calibration force arm rod, so that the calibration process of torque measurement is simplified; the air hydrostatic bearing is adopted to reduce the influence of external interference on the moment measurement, and the measurement precision and the system stability are improved; the problems of difficult clamping, easy overload damage, low measurement precision and the like of the conventional torque sensor measuring device are solved through design, the micro-torque measuring device with high precision, low cost and easy operation is provided, and the micro-torque measuring device can be popularized and used in various motor micro-torque measurement occasions.
The purpose of the invention is realized by the following technical scheme:
a micro-torque measuring device based on a torque sensor comprises a cubic case consisting of an upper panel, a lower panel, a left panel, a right panel, a front panel and a rear panel, wherein a pressure gauge and an air pressure adjusting valve hole are arranged on the front panel; the upper surface of the upper panel is also provided with a horizontal bubble, the lower surface of the upper panel is provided with a sleeve, an aerostatic bearing, a coupler, a torque sensor and a locking fixing device are sequentially arranged in the sleeve from top to bottom, the top end of the aerostatic bearing is connected with a measuring table, the aerostatic bearing and the torque sensor are mutually connected through the coupler, a jackscrew for fixing the torque sensor is arranged in the locking fixing device, and the bottom of the locking fixing device is fixedly connected with the bottom of the sleeve; the air hydrostatic bearing is connected with an external air source through the air pressure quick connector, the torque sensor is connected with an electric control case outside the case through a cable and the aviation plug, and the electric control case is connected with a computer.
Furthermore, the upper panel and the lower panel are fixed with the left panel and the right panel through screws, and the front panel and the rear panel are installed in a sliding-in mode to form the case.
Further, the torque sensor is fixed through a sensor support, and the bottom of the sensor support is fixedly connected with the bottom of the sleeve.
Furthermore, the measuring table is movably connected with a self-calibration force arm rod used for calibrating the micro-torque measuring device.
Furthermore, the aerostatic bearing is provided with a flange plate connected with the lower surface of the upper panel.
Furthermore, a pressure regulator is arranged in the case, and the air pressure regulating valve extends out of the air pressure regulating valve hole by adopting a knob extending structure, so that the air pressure of the air hydrostatic bearing is controlled from the outside.
Furthermore, handles are arranged on the left panel and the right panel.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. the micro-moment measuring device can be used for measuring the reaction moment of the gyroscope motor, the motor interference moment and the fluctuation moment, and can realize the moment measurement in the x direction, the y direction and the z direction. The radial and axial torque measurement of different types of motors can be completed by one torque meter.
2. In order to improve the torque measurement precision, the torque sensor adopts a design scheme of fixing one end, the locking fixing device is designed, and the structure of the shaft at one end of the torque sensor is designed to be locked through the locking fixing device.
3. The self-calibration force arm rod is arranged on the measuring table, the self-calibration force arm rod is suspended when the device is calibrated, the self-calibration force arm rod is taken down after the calibration is finished, the rotational inertia in the moment measuring process is not increased, the influence on the precision of the moment measuring device is reduced, the measurement is more accurate, and the calibration process of the moment measuring device is greatly simplified.
4. The air hydrostatic bearing is adopted, torque generated by the motor is transmitted through the air hydrostatic bearing, influence caused by interference torque such as external friction is greatly reduced, and measuring accuracy and system stability are improved.
5. In order to avoid the phenomenon that the coaxiality of the device cannot return to the zero point and the measured numerical value deviation is overlarge due to the coaxiality installation error in the process of connecting the torque sensor and the air hydrostatic bearing through the coupler, the design that the elastic coupler and the locking fixing device and the torque sensor support are all fixed on the sleeve is adopted, the installation difficulty of the coaxiality of the micro-torque measuring device is reduced, and the installation coaxiality can be debugged only by adjusting the position of any one end. The elastic coupling can compensate radial and axial deviation and angular displacement, and is convenient for ensuring the coaxiality.
6. The micro-torque measuring device based on the torque sensor greatly improves the measuring precision and the stability of the system by fixing one end of the torque sensor, and fixing the air hydrostatic bearing, the elastic coupling and the locking fixing device of the invention on the sleeve, and the measuring precision of the selected torque sensor is 1.5 × 10-5N.m is greatly improved to 2 × 10- 6N.m, is improved by one order of magnitude,the micro-torque measurement precision of the torque sensor in the field is improved.
7. The locking fixing device adopts interference fit and jackscrew design, the jackscrew is designed through calculation of jacking torque, and when overload torque is applied, the jackscrew fails to protect the torque sensor from overload damage; compared with the problems of difficult clamping, easy overload damage, low measurement precision and the like of the traditional measuring device, the torque measuring device has the advantages of high precision, low cost, easy operation, safety, reliability and the like.
Drawings
FIG. 1 is an assembly view of a micro-torque measuring device of the present invention.
Fig. 2 is a schematic view of the internal structure of the micro-moment measuring device of the present invention.
Fig. 3 is a schematic view showing a connection state of the micro-moment measuring device of the present invention.
FIG. 4 is a schematic view of the measuring table and the self-calibration arm of the micro-moment measuring device of the present invention.
Fig. 5 is a schematic structural view of a locking fixing device in the micro-torque measuring device of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in figure 1, the invention provides a micro-torque measuring device based on a torque sensor, which comprises a cubic case consisting of an upper panel 1, a lower panel 2, a left panel 3, a right panel 4, a front panel 5 and a rear panel, wherein a measuring table 6 is arranged in the middle of the upper panel 1, a measured gyroscope motor is inserted into the measuring table 6 by using an extension shaft tool, the tool is fixed on the measuring table through fastening screws, and a self-calibration force arm 29 can be suspended into and out of the measuring table 6 to realize calibration of the torque measuring device; the upper panel 1, the lower panel 2, the left panel 3 and the right panel 4 are fixed through countersunk screws 13, and the front panel 5 and the rear panel are installed in a sliding-in manner, so that the installation irrelevant to measurement is simplified; the upper panel 1 is provided with a horizontal bubble 12, so that the level of the measuring device can be conveniently adjusted; the handles 8 on the left panel and the right panel are fixed by fastening screws on the inner sides of the panels; a pressure gauge shell 7 is fixed on the front panel 5 through screws, and the pressure gauge is arranged on the pressure gauge shell 7; the internal air hydrostatic bearing 14 is connected with an external air source 26 by adopting an air charging connector 15 and an air pressure quick connector 10, a pressure regulator is arranged in the case, and an air pressure regulating valve 9 in the case adopts a stretching knob type structure, so that the air pressure of the air hydrostatic bearing is controlled from the outside; signals of the torque sensor 20 are transmitted into a computer for processing through a cable through an aviation plug 11 arranged on the right panel 4, the fixation of each part is checked to be reliable, and measurement is started after the aerostatic bearing 14 is inflated.
Specifically, the design of sleeve is the cylinder in this embodiment, and there is the tangent plane windowing to handle the cylinder side, is semi-open, guarantees intensity and still guarantees to adjust and observe in the sleeve simultaneously. The connecting pipe of the aerostatic bearing connected with the external air source 26 is inserted from an opening window positioned on the side surface of the sleeve, the front panel 5 is provided with an air pressure adjusting valve hole, and the air pressure is adjusted by an air pressure adjusting valve 9 extending out of the air pressure adjusting valve hole.
The internal structure of the micro-torque measuring device of the embodiment is shown in fig. 2 to 5, and the measuring table 6 is connected with the upper end face of the aerostatic bearing 14 through a fastening screw; a flange plate is arranged on the aerostatic bearing 14 and is fixed with the lower end surface of the upper panel 1 through a fastening screw 16; the lower end of the aerostatic bearing 14 is connected with a torque sensor 20 shaft through an elastic coupling 17, and the elastic coupling 17 compensates radial, angular and axial deviations under the elastic action; the torque sensor 20 is fixed on a sensor support 21 through a fastening screw 22, the sensor support 21 is connected with the lower end of the sleeve 18, the influence of the gravity of the torque sensor 14 is decomposed on a bottom surface screw 25, and the influence on torque measurement is reduced; the lower shaft of the torque sensor 20 is inserted into the lower end locking fixing device 23, the lower shaft of the torque sensor 20 is not convenient to rotate relatively while the coaxiality is guaranteed by adopting interference fit, and the lower shaft of the torque sensor 20 is fixed through the jackscrew 24, so that the sensor can measure strain conveniently; the locking fixing device 23 is fixed at the lower end of the sleeve 18 through a fastening screw 25; the sleeve 18 is fixed on the lower end surface of the upper panel 1 through a fastening screw 19; inserting an air pipe into the air hydrostatic bearing inflation connector 15; at this point, the torque measuring device is installed.
The connection diagram of the micro-measurement device is shown in fig. 3, a cable connection device is used to connect the electronic control cabinet 27, the electronic control cabinet 27 is connected with the upper computer 28, and after the reliable fixation of each part is checked, the air hydrostatic bearing 14 is inflated by using the external air source 26, and then the measurement is started. The torque sensor is connected with the electric control case 27 through a cable and an aviation plug, the electric control case 27 is connected with the computer 28, after the reliable fixation of each part is checked, the air hydrostatic bearing 14 is inflated by using an external air source 26, and then the measurement is started.
For the micro-torque measuring device based on the torque sensor 20, the structure is relatively simple, the installation is convenient, the elastic coupling 17 can compensate radial and axial deviation and angular displacement, and the coaxiality is convenient to ensure; the locking fixing device 23 and the sensor support 21 are all fixed on the sleeve 18, the sleeve 18 is arranged on the lower end face of the upper panel 1, the installation difficulty of the coaxiality of the torque measuring device is reduced, and the adjustment of the installation coaxiality can be realized only by adjusting the position of any one end in cooperation with the elastic coupling 17; the locking fixing device 23 is designed by interference fit and a jackscrew 24, the jackscrew 24 is designed by calculation of a jacking moment, and when an overload moment is applied, the jackscrew 24 fails to protect the torque sensor 20 from overload damage; compared with the problems of difficult clamping, easy overload damage, low measurement precision and the like of the traditional measurement device, the micro-torque measurement device with high precision, low cost, easy operation, safety and reliability is provided.
The present invention is not limited to the above-described embodiments. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make many changes and modifications to the invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A micro-torque measuring device based on a torque sensor is characterized by comprising a cubic case consisting of an upper panel, a lower panel, a left panel, a right panel, a front panel and a rear panel, wherein the front panel is provided with a pressure gauge and an air pressure adjusting valve hole, the right panel is provided with an air pressure quick joint and an aviation plug, the middle part of the upper panel is provided with a measuring table, and the measuring table is used for fixing an output shaft of a motor to be measured; the upper surface of the upper panel is also provided with a horizontal bubble, the lower surface of the upper panel is provided with a sleeve, the sleeve is internally provided with an air hydrostatic bearing, a coupler, a torque sensor and a locking fixing device which are sequentially connected, the top end of the air hydrostatic bearing is connected with a measuring table, the air hydrostatic bearing and the torque sensor are mutually connected through the coupler, the locking fixing device is internally provided with a jackscrew for fixing the torque sensor, and the bottom of the locking fixing device is fixedly connected with the bottom of the sleeve; the air hydrostatic bearing is connected with an external air source through the air pressure quick connector, the torque sensor is connected with an electric control case outside the case through a cable and the aviation plug, and the electric control case is connected with a computer.
2. The micro-torque measurement device based on the torque sensor as claimed in claim 1, wherein the upper panel and the lower panel are fixed with the left panel and the right panel by screws, and the front panel and the rear panel are installed in a sliding manner to form the case.
3. The micro-torque measurement device based on the torque sensor as claimed in claim 1, wherein the torque sensor is fixed by a sensor bracket, and the bottom of the sensor bracket is fixedly connected with the bottom of the sleeve.
4. The micro-torque measurement device based on the torque sensor as claimed in claim 1, wherein the measurement platform is movably connected with a self-calibration arm lever for calibrating the micro-torque measurement device.
5. The micro-torque measurement device based on the torque sensor as claimed in claim 1, wherein the aerostatic bearing is provided with a flange connected to a lower surface of the upper panel.
6. The micro-torque measurement device based on the torque sensor as claimed in claim 1, wherein a pressure regulator is arranged in the case, and the air pressure regulating valve extends out of the air pressure regulating valve hole by adopting a knob extending structure, so that the air pressure of the air hydrostatic bearing is controlled from the outside.
7. The micro-torque measurement device based on the torque sensor as claimed in claim 1, wherein the left and right panels are further provided with handles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010572789.3A CN111649853A (en) | 2020-06-22 | 2020-06-22 | Micro-torque measuring device based on torque sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010572789.3A CN111649853A (en) | 2020-06-22 | 2020-06-22 | Micro-torque measuring device based on torque sensor |
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| CN111649853A true CN111649853A (en) | 2020-09-11 |
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| CN202010572789.3A Pending CN111649853A (en) | 2020-06-22 | 2020-06-22 | Micro-torque measuring device based on torque sensor |
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| CN202092808U (en) * | 2011-04-22 | 2011-12-28 | 西安航志机电设备科技有限公司 | Hysteresis torque and ripple torque tester of motor |
| CN102410923A (en) * | 2011-08-09 | 2012-04-11 | 西安理工大学 | Rigid and non-linear relation testing device and method of cylindrical fit joint surface |
| CN102620872A (en) * | 2012-03-08 | 2012-08-01 | 陕西理工学院 | Sensor for measuring rotary machining torque and axial force |
| CN204301901U (en) * | 2014-12-29 | 2015-04-29 | 西安航志机电设备科技有限公司 | Small and special electric machine reaction moment tester |
| CN105021338A (en) * | 2015-08-12 | 2015-11-04 | 天津大学 | Torque measurement apparatus and method for miniature tension-torsion fatigue testing machine |
| CN109506931A (en) * | 2018-12-31 | 2019-03-22 | 国人机器人（天津）有限公司 | A kind of limit torque tester of harmonic reducer flexible wheel |
| CN109827684A (en) * | 2019-03-05 | 2019-05-31 | 陕西航天时代导航设备有限公司 | A kind of torque motor torque fluctuations tester and test method |
| CN212378935U (en) * | 2020-06-22 | 2021-01-19 | 天津大学 | Micro-torque measuring device based on torque sensor |
-
2020
- 2020-06-22 CN CN202010572789.3A patent/CN111649853A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775630Y (en) * | 2004-12-03 | 2006-04-26 | 深圳市浚海仪表设备有限公司 | Intelligent torgue calibration equipment |
| CN1851428A (en) * | 2006-04-30 | 2006-10-25 | 北京航空航天大学 | Torque test air support rotating platform for control torque gyro |
| CN202092808U (en) * | 2011-04-22 | 2011-12-28 | 西安航志机电设备科技有限公司 | Hysteresis torque and ripple torque tester of motor |
| CN102410923A (en) * | 2011-08-09 | 2012-04-11 | 西安理工大学 | Rigid and non-linear relation testing device and method of cylindrical fit joint surface |
| CN102620872A (en) * | 2012-03-08 | 2012-08-01 | 陕西理工学院 | Sensor for measuring rotary machining torque and axial force |
| CN204301901U (en) * | 2014-12-29 | 2015-04-29 | 西安航志机电设备科技有限公司 | Small and special electric machine reaction moment tester |
| CN105021338A (en) * | 2015-08-12 | 2015-11-04 | 天津大学 | Torque measurement apparatus and method for miniature tension-torsion fatigue testing machine |
| CN109506931A (en) * | 2018-12-31 | 2019-03-22 | 国人机器人（天津）有限公司 | A kind of limit torque tester of harmonic reducer flexible wheel |
| CN109827684A (en) * | 2019-03-05 | 2019-05-31 | 陕西航天时代导航设备有限公司 | A kind of torque motor torque fluctuations tester and test method |
| CN212378935U (en) * | 2020-06-22 | 2021-01-19 | 天津大学 | Micro-torque measuring device based on torque sensor |
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