CN109827684A - A kind of torque motor torque fluctuations tester and test method - Google Patents
A kind of torque motor torque fluctuations tester and test method Download PDFInfo
- Publication number
- CN109827684A CN109827684A CN201910164036.6A CN201910164036A CN109827684A CN 109827684 A CN109827684 A CN 109827684A CN 201910164036 A CN201910164036 A CN 201910164036A CN 109827684 A CN109827684 A CN 109827684A
- Authority
- CN
- China
- Prior art keywords
- torque
- torque motor
- arm bar
- force
- pressurized air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 46
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 10
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
A kind of torque motor torque fluctuations tester and test method, including test cabinet and control cabinet, the test cabinet includes rotatable platform, torque motor, hydrostatic gas-lubricated bearing and force snesor, the control cabinet includes programmable power supply, the present invention drives pressurized air main axis to drive arm bar by torque motor, make force snesor measure power to handle by the continuous acquisition of computer, the force value that high-precision force sensor measures is worth torque multiplied by the accurate arm of force, realizes the torque of torque motor and M=f (Q) characteristic monitoring of corner.
Description
Technical field
The present invention relates to test equipment technical fields, and in particular to a kind of torque motor torque fluctuations tester and test side
Method.
Background technique
In the Multiple Type torque motor of Aeronautics and Astronautics engineering field, need to test disturbance torque, stalling torque, peak value
The performance parameters such as stall sensitivity, torque fluctuations, the motor torque linearity.The test of the motor torque linearity is all using traditional
Counterweight test method is hung, this method, which is not only tested, discontinuously needs the counterweight of different quality successively to test determining moment values, test
Method backwardness, low efficiency, and the accuracy of test data is low, error is big, and test, which needs two people or more to cooperate, just can be carried out, only
Can manually implemented single-spot testing, can not be formed the torque of continuous tested torque motor and M=f (Q) characteristic curve of corner and
Torque fluctuations curve.
Summary of the invention
For the defect for solving the above-mentioned prior art, the present invention provides a kind of torque that test data accuracy is high, high-efficient
Motor torque ripple tester and test method.
The technical scheme is that a kind of torque motor torque fluctuations tester, including test cabinet and control cabinet,
The test cabinet includes rotatable platform, torque motor, hydrostatic gas-lubricated bearing and force snesor, and the control cabinet includes program-controlled
Power supply, the torque motor include the rotor on the inside of stator and stator, and the hydrostatic gas-lubricated bearing includes pressurized air main shaft, institute
It states rotatable platform and is fixedly connected with the stator, and the rotor is fixedly connected with pressurized air main shaft one end, the pressurized air master
The axis other end is vertically connected with arm bar, and the programmable power supply is torque motor power supply, and the arm bar and the power pass
Sensor contact.
Preferably, the force snesor is connected with sliding block, and the sliding block is mounted on sliding platform, and the sliding block can be along power
Armed lever slides adjustment position on sliding platform.
Preferably, force snesor side is equipped with groove, and the arm bar is placed in groove, and have on the inside of the groove with
Two tapered contacts of arm bar contact.
Preferably, the test cabinet includes serial server, force sensor signals amplifier, slide unit controller, turntable
Controller, pressure reducing valve and air filter, the force sensor signals amplifier and the force snesor pass through cable connection, institute
It states slide unit controller and the sliding platform and is connected by cable connection, the turntable controller and the rotatable platform by cable
It connects, the serial server is separately connected turntable controller, slide unit controller and force sensor signals amplifier, institute by cable
It states air filter to connect with the pressure reducing valve, the pressure reducing valve is connect with the hydrostatic gas-lubricated bearing.
Preferably, the control cabinet includes industrial personal computer and touch display screen, and the touch display screen connects the industry control
Machine, the industrial personal computer output control signals to the serial server by data line and acquire data, industrial personal computer, serial port service
Device, force sensor signals amplifier, slide unit controller and turntable controller pass through the external 220V of power interface on control cabinet
Power supply realizes power supply.
Preferably, the limited block that the arm bar is swung can be limited there are two setting in the pressurized air spindle nose.
Preferably, the rotatable platform is mounted on the support base of arch.
Based on a kind of torque motor torque fluctuations tester, the present invention also provides a kind of for measuring torque motor torque
Test method, when interfering torque testing, slide unit controller controls sliding block 107 and slides torque motor, makes the taper in groove 118
Apart from 105 proximal end of pressurized air main shaft, turntable controller controls rotatable platform 101 and rotates for contact and 106 contact position of arm bar,
The rotation of rotating device 101 rotates with it the stator 1021 in motor 102, and motor 102 makes with the rotation of dynamical and static pressure gas main shaft 105
Arm bar 106 is contacted with the tapered contact in groove 118, the force value that force snesor 104 measures multiplied by arm bar 106 moment values
Obtain torque；
When locked-rotor torque is tested, slide unit controller controls sliding block 107 and slides torque motor, makes the taper in groove 118
Contact and 106 contact position of arm bar are apart from pressurized air main shaft distal end, and rotatable platform 101 is fixed, programmable power supply 201
To 1022 output driving current of rotor, make to generate electromagnetic torque between stator 1021 and rotor 1022, which makes static pressure
Gas bearing 105 rotates, and contacts arm bar 106 with the tapered contact in groove 118, the force value that force snesor 104 measures multiplies
Torque is obtained with the moment values of arm bar 106.
Beneficial effects of the present invention: the present invention uses the high-precision force snesor dynamometry of 10N range accuracy, resetting essence
The sliding platform that up to ± 1 μm of degree changes arm of force value, and interference torque measurement torque arm length is designed as 4mm, interferes the test of torque
Range reaches 0.4gcm up to 0~400gcm, small torque measuring accuracy；Locked-rotor torque measurement torque arm length is designed as 200mm, blocks up
The test scope of square of walking around is up to 20000gcm, is contacted using the small contact of contact surface with arm bar, test data accuracy
Height drives pressurized air main axis to drive arm bar, the company for making force snesor measure power by computer by torque motor
Continuous acquisition process, the force value that high-precision force sensor measures are worth torque multiplied by the accurate arm of force, realize torque motor
M=f (Q) characteristic monitoring of torque and corner, it is high-efficient, save human cost.
Detailed description of the invention
Fig. 1 is test device cross-sectional view of the invention；
Fig. 2 is arm bar and groove hookup；
Fig. 3 is test cabinet structure chart；
Fig. 4 is structure of the invention figure；
Fig. 5 is present system figure；
Fig. 6 is the structure chart of test device of the present invention.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Technical solution of the present invention is as follows: a kind of torque motor torque fluctuations tester, including test cabinet 1 and control cabinet
2, test cabinet 1 includes rotatable platform 101, torque motor 102, hydrostatic gas-lubricated bearing 103 and force snesor 104, controls cabinet 2
Including programmable power supply 201, as shown in Figure 1, torque motor 102 includes the rotor 1022 on the inside of stator 1021 and stator, static pressure gas
Body bearing 103 includes pressurized air main shaft 105, using hydrostatic gas-lubricated bearing as supporting, avoids and generates additionally at support
Additional moment influences the accuracy of test, and rotatable platform 101 is fixedly connected with stator 1021, and rotor 1022 is fixedly connected with static pressure
105 one end of gas bearing, 105 other end of pressurized air main shaft are vertically connected with arm bar 106, and programmable power supply 201 is torque electricity
Machine 102 is powered, and arm bar 106 is contacted with force snesor 104, and the voltage of programmable power supply 201 is 0~30V, and electric current is 0~5A, power
Sensor uses 10N range accuracy；
As shown in Fig. 2, force snesor 104 is connected with sliding block 107, sliding block 107 is mounted on sliding platform 108, sliding block 107
Adjustment position can be slided on sliding platform 108 along arm bar 106；104 side of force snesor installation fluted 118, arm bar
106 are placed in groove 118, and have two tapered contacts 119 contacted with arm bar 106, tapered contact on the inside of groove 118
119 points contact arm bar be in order to which contact area is small, force snesor measured forces it is accurate；
As shown in figure 3, test cabinet 1 includes serial server, force sensor signals amplifier, slide unit controller, turntable
Controller, pressure reducing valve 114 and air filter 115, force sensor signals amplifier and force snesor 104 pass through cable connection,
By cable connection, turntable controller passes through cable connection, serial ports with rotatable platform 101 for slide unit controller and sliding platform 108
Server is separately connected turntable controller, slide unit controller and force sensor signals amplifier, air filter 111 by cable
It is connect with pressure reducing valve 110, pressure reducing valve 110 is connect with hydrostatic gas-lubricated bearing 105, and setting air filter is for pressurized air main shaft
It provides and stablizes clean gas source；
As shown in figure 4, control cabinet 2 includes industrial personal computer 202 and touch display screen 203, touch display screen 203 connects industry control
Machine 202, as shown in figure 5, industrial personal computer 202 outputs control signals to serial server by data line and acquires data, industrial personal computer,
Serial server, force sensor signals amplifier, slide unit controller and turntable controller pass through the power interface on control cabinet
External 220V power supply realizes power supply；
As shown in fig. 6, setting in 105 end of pressurized air main shaft, there are two the limited blocks that can limit the swing of arm bar 106
116, limited block 119 is overload protecting mechanism；Rotatable platform 101 is mounted on the support base 117 of arch.
The test philosophy of torque motor: when carrying out interference torque testing, slide unit controller controls sliding block 107 and slides, and makes recessed
Apart from 105 proximal end of pressurized air main shaft, turntable controller control turns tapered contact and 106 contact position of arm bar in slot 118
Moving platform 101 rotates, and the rotation of rotating device 101 rotates with it the stator 1021 in motor 102, and motor 102 is with dynamic and static pressure gas
The rotation of body main shaft 105 contacts arm bar 106 with the tapered contact in groove 118, and the force value that force snesor 104 measures is multiplied by power
The moment values of armed lever 106 obtain torque；
When carrying out locked-rotor torque test, slide unit controller controls sliding block 107 and slides, make tapered contact in groove 118 with
106 contact position of arm bar is apart from pressurized air main shaft distal end, and rotatable platform 101 is fixed, and programmable power supply 201 is to rotor
1022 output driving currents make to generate electromagnetic torque between stator 1021 and rotor 1022, which makes pressurized air master
Axis 105 rotates, and contacts arm bar 106 with the tapered contact in groove 118, the force value that force snesor 104 measures is multiplied by the arm of force
The moment values of bar 106 obtain torque.
Interference torque measurement: the test scope for interfering torque is 0~400gcm, and small torque measuring accuracy reaches 0.4g
Cm, the Design of length of arm bar are 4mm, and operator is carried out by the management software that touch display screen 203 manipulates industrial personal computer 202
Torque testing is interfered, industrial personal computer 202 is by serial server respectively to slide unit controller and turntable controller output interference torque
Test instruction, slip controller 111 control the sliding block 107 on sliding platform 108 and slide, make tapered contact in groove 118 with
For 106 contact point of arm bar at pressurized air main shaft 4mm, turntable controller issues indexable instruction to rotatable platform 101, rotation
Platform 101, which starts slowly to rotate, rotates the stator 1021 of motor 102, and motor 102 makes power with the rotation of dynamical and static pressure gas main shaft 105
Armed lever 106 is contacted with the tapered contact in groove 118, and force snesor 104 is in rotations in stator 1021 positive and negative two weeks of motor 102
It continuously measures power, industry control is transmitted to by serial server after the data of force sensor signals amplifier acquisition force snesor 104
Machine 202, industrial personal computer 202 form torque test curve after obtaining disturbance torque by management software calculation processing.
Locked-rotor torque measurement: the test scope of locked-rotor torque is 400gcm~20000gcm, and measuring accuracy reaches
10gcm, the Design of length of arm bar are 200mm, and operator manipulates the management of industrial personal computer 202 by touch display screen 203
Software carries out locked-rotor torque test, and industrial personal computer 202 is exported to slide unit controller and turntable controller respectively by serial server
Locked-rotor torque tests signal, and turntable controller control rotatable platform 101 is fixed, and slide unit controller controls sliding platform 108
On sliding block 107 slide, make tapered contact in groove 118 and 106 contact point of arm bar apart from pressurized air main shaft 200mm
Place, motor 102 be in locked rotor condition, and industrial personal computer 202 is to the output locked rotor current signal of programmable power supply 201, and programmable power supply 201 is to power
1022 output driving current of rotor of torque motor 102, makes to generate electromagnetic torque between the stator of torque motor and rotor, the electromagnetism
Torque rotates pressurized air main shaft 105, contacts arm bar 106 with the tapered contact in groove 118, force sensor signals are put
Industrial personal computer 202 is transmitted to by serial server after the data of big device acquisition force snesor 104, industrial personal computer 202 is soft by managing
Part calculation processing forms torque test curve after obtaining stalling torque, and industrial personal computer control programmable power supply can change the big of locked rotor current
It is small, the size of locked-rotor torque under any locked rotor current can be measured, moreover it is possible to measure under rotatable platform rotation any angular position
Locked-rotor torque.
The management software of industrial personal computer is developed using 2015 Chinese edition of Labview, the pipe under 7 system of Windows
Manage software realization parameter setting, Communication processing, data processing function, auto test flow and startup self-detection program module, the pipe
Manage the concrete function of software are as follows:
(1) test that torque motor disturbance torque, output torque fluctuate；
(2) locked-rotor torque of any driving current value of torque motor, the torque linearity and the test of sensitivity；
(3) motor stator and torque output linearity degree and peak point current spirit under any relative position of rotor can be tested
Sensitivity；
(4) precise rotating platform slewing rate can be set；
(5) current gradient of settable linearity test；
(6) settable linearity test table position (any position in -360 °~360 ° sections)；
(7) figure, data reproduction and test report can be carried out and generate printing；
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all in this hair
Any modification, equivalent replacement, improvement and so within bright spirit and principle, are included within the scope of protection of the present invention.
Claims (8)
1. a kind of torque motor torque fluctuations tester, including test cabinet (1) and control cabinet (2), it is characterised in that: described
Test cabinet (1) includes rotatable platform (101), torque motor (102), hydrostatic gas-lubricated bearing (103) and force snesor (104),
The control cabinet (2) includes programmable power supply (201), and the torque motor (102) includes on the inside of stator (1021) and stator
Rotor (1022), the hydrostatic gas-lubricated bearing (103) include pressurized air main shaft (105), and the rotatable platform (101) is fixed to be connected
It connects the stator (1021), and the rotor (1022) is fixedly connected with pressurized air main shaft (105) one end, the pressurized air master
Axis (105) other end is vertically connected with arm bar (106), and the programmable power supply (201) is the torque motor (102) power supply,
The arm bar (106) contacts with the force snesor (104).
2. a kind of torque motor torque fluctuations tester according to claim 1, it is characterised in that: the force snesor
(104) it is connected with sliding block (107), the sliding block (107) is mounted on sliding platform (108), and the sliding block (107) can be along the arm of force
Bar (106) slides adjustment position on sliding platform (108).
3. a kind of torque motor torque fluctuations tester according to claim 2, it is characterised in that: force snesor (104)
Fluted (118) are installed in side, and the arm bar (106) is placed in groove (118), and have on the inside of the groove (118) with
Two tapered contacts (119) of arm bar (106) contact.
4. a kind of torque motor torque fluctuations tester according to claim 1, it is characterised in that: the test cabinet
It (1) include serial server, force sensor signals amplifier, slide unit controller, turntable controller, pressure reducing valve (114) and air
Filter (115), the force sensor signals amplifier and the force snesor (104) pass through cable connection, the slide unit control
By cable connection, the turntable controller and the rotatable platform (101) pass through cable for device processed and the sliding platform (108)
Connection, the serial server are separately connected turntable controller, slide unit controller and force sensor signals amplifier by cable,
The air filter (111) connect with the pressure reducing valve (110), the pressure reducing valve (110) and the hydrostatic gas-lubricated bearing
(105) it connects.
5. a kind of torque motor torque fluctuations tester according to claim 1 or 4, it is characterised in that: the control machine
Cabinet (2) includes industrial personal computer (202) and touch display screen (203), and the touch display screen (203) connects the industrial personal computer (202),
The industrial personal computer (202) outputs control signals to the serial server by data line and acquires data, industrial personal computer, serial ports clothes
Business device, force sensor signals amplifier, slide unit controller and turntable controller are external by the power interface on control cabinet
220V power supply realizes power supply.
6. a kind of torque motor torque fluctuations tester according to claim 1, it is characterised in that: in the pressurized air
Main shaft (105) end can limit the limited block (116) that the arm bar (106) are swung there are two setting.
7. a kind of torque motor torque fluctuations tester according to claim 1, it is characterised in that: the rotatable platform
(101) it is mounted on the support base (117) of arch.
8. the present invention also provides one kind for surveying based on a kind of torque motor torque fluctuations tester described in claim 1-7
The test method for torque motor torque of measuring one's own ability, it is characterised in that:
For torque motor when interfering torque testing, slide unit controller controls sliding block (107) sliding, makes the taper in groove (118)
Apart from pressurized air main shaft (104) proximal end, turntable controller control rotation is flat for contact (119) and arm bar (106) contact position
Platform (101) rotation, rotating device (101) rotation rotate with it the stator (1021) in motor (102), and motor (102) drives
Pressurized air main shaft (104) rotation contacts arm bar (106) with the tapered contact (119) in groove (118), force snesor
(103) force value measured obtains torque multiplied by the moment values of arm bar (106)；
For torque motor when locked-rotor torque is tested, slide unit controller controls sliding block (107) sliding, makes the taper in groove (118)
Contact (119) and arm bar (106) contact position are apart from pressurized air main shaft distal end, and rotatable platform (101) is fixed, journey
Power supply (201) are controlled to rotor (1022) output driving current, make to generate electromagnetic torque between stator (1021) and rotor (1022),
The electromagnetic torque rotates pressurized air main shaft (104), connects arm bar (106) with the tapered contact (119) in groove (118)
Touching, the force value that force snesor (103) measures obtain torque multiplied by the moment values of arm bar (106).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910164036.6A CN109827684B (en) | 2019-03-05 | 2019-03-05 | Moment fluctuation tester and testing method for moment motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910164036.6A CN109827684B (en) | 2019-03-05 | 2019-03-05 | Moment fluctuation tester and testing method for moment motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109827684A true CN109827684A (en) | 2019-05-31 |
| CN109827684B CN109827684B (en) | 2024-08-30 |
Family
ID=66865376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910164036.6A Active CN109827684B (en) | 2019-03-05 | 2019-03-05 | Moment fluctuation tester and testing method for moment motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109827684B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649853A (en) * | 2020-06-22 | 2020-09-11 | 天津大学 | Micro-torque measuring device based on torque sensor |
| CN111795773A (en) * | 2020-08-10 | 2020-10-20 | 海卓(武汉)自动化科技有限公司 | Large-torque sensor calibration device and calibration method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0612991A1 (en) * | 1993-02-25 | 1994-08-31 | Daniel Fuchs | Device for measuring torque between a motor assembly and a load assembly |
| CN103411715A (en) * | 2013-07-11 | 2013-11-27 | 河南科技大学 | Torque motor resistance moment testing system |
| US20130312534A1 (en) * | 2012-05-28 | 2013-11-28 | Hon Hai Precision Industry Co., Ltd. | Device and method for testing pulling force |
| CN103913261A (en) * | 2014-04-17 | 2014-07-09 | 哈尔滨工业大学 | Brush friction torque ripple coefficient detection device and method of torque motor |
| CN204807248U (en) * | 2015-03-11 | 2015-11-25 | 西安航志机电设备科技有限公司 | Little moment tester of electron |
| CN209783785U (en) * | 2019-03-05 | 2019-12-13 | 陕西航天时代导航设备有限公司 | torque fluctuation tester for torque motor |
-
2019
- 2019-03-05 CN CN201910164036.6A patent/CN109827684B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0612991A1 (en) * | 1993-02-25 | 1994-08-31 | Daniel Fuchs | Device for measuring torque between a motor assembly and a load assembly |
| US20130312534A1 (en) * | 2012-05-28 | 2013-11-28 | Hon Hai Precision Industry Co., Ltd. | Device and method for testing pulling force |
| CN103411715A (en) * | 2013-07-11 | 2013-11-27 | 河南科技大学 | Torque motor resistance moment testing system |
| CN103913261A (en) * | 2014-04-17 | 2014-07-09 | 哈尔滨工业大学 | Brush friction torque ripple coefficient detection device and method of torque motor |
| CN204807248U (en) * | 2015-03-11 | 2015-11-25 | 西安航志机电设备科技有限公司 | Little moment tester of electron |
| CN209783785U (en) * | 2019-03-05 | 2019-12-13 | 陕西航天时代导航设备有限公司 | torque fluctuation tester for torque motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649853A (en) * | 2020-06-22 | 2020-09-11 | 天津大学 | Micro-torque measuring device based on torque sensor |
| CN111795773A (en) * | 2020-08-10 | 2020-10-20 | 海卓(武汉)自动化科技有限公司 | Large-torque sensor calibration device and calibration method |
| CN111795773B (en) * | 2020-08-10 | 2024-04-26 | 海卓(武汉)自动化科技有限公司 | Large-torque sensor calibration device and calibration method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109827684B (en) | 2024-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202083309U (en) | Automatic calibrating apparatus of wide-range general calipers | |
| CN104122036B (en) | Routine test centrifuge stationary-mobile state balance monitoring device | |
| CN109827684A (en) | A kind of torque motor torque fluctuations tester and test method | |
| CN103712791A (en) | Main shaft axial dynamic stiffness test device | |
| CN105290880B (en) | A kind of device and method detecting verticality between main-shaft axis and datum axis movement | |
| CN103791819B (en) | Aeroengine rotor assembly method and the device of swivel angle plate is adjusted based on regulation of mental activities | |
| CN108031870A (en) | A kind of main shaft of numerical control machine tool loading performance test device and test evaluation method | |
| CN106813999A (en) | A kind of portable friction abrasion test device | |
| CN106918425A (en) | Instrumented wheelset dynamic calibration testing stand | |
| CN111215648B (en) | Electric spindle reliability rapid experiment loading method and loading system | |
| CN102192999A (en) | Probe-based automatic airflow pressure and velocity measurement device | |
| CN104179708B (en) | Magnetic-suspension high-speed aerator combination property test desk | |
| CN204116375U (en) | A kind of device for testing elevator traction machine rotating speed | |
| CN203981346U (en) | Routine test hydro-extractor is quiet-mobile equilibrium monitoring device | |
| CN201499120U (en) | Motor rotation speed wireless checking control device | |
| CN206269734U (en) | A kind of precisely mobile concentricity measuring instrument of double testing head | |
| CN209783785U (en) | torque fluctuation tester for torque motor | |
| CN108957032A (en) | A kind of speed probe dynamic measuring signal source generating means | |
| CN203191126U (en) | Multi-directionally adjustable cartridge torque tester | |
| CN209027403U (en) | A kind of novel test device for high technology ceramics | |
| CN201845053U (en) | Pneumatic full-automatic surface resistance meter | |
| CN207066636U (en) | Rotor thrust and force moment testing device | |
| CN207703136U (en) | Plain bearing bush gap measuring apparatus | |
| CN203687907U (en) | Insulator deviation detection device | |
| CN206269733U (en) | A kind of double testing head formula concentricity measuring instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |