CN106895972B - A kind of stick-slip experimental rig - Google Patents
A kind of stick-slip experimental rig Download PDFInfo
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- CN106895972B CN106895972B CN201710259977.9A CN201710259977A CN106895972B CN 106895972 B CN106895972 B CN 106895972B CN 201710259977 A CN201710259977 A CN 201710259977A CN 106895972 B CN106895972 B CN 106895972B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
A kind of stick-slip experimental rig, belongs to tribology technology field.Device provided by the invention controls the movement of two-dimensional movement platform 2 in the horizontal and vertical directions by control system, strain force sensor 14 is set to be fixed axis 6 keeps setting in turn normal load after compressing fixture 9 contacts friction member 10 and lower friction member 11, control system control rotating device 3 is rotated with the speed and direction of setting, so that generating relative friction between upper friction member 10 and lower friction member 11.The present invention can effectively avoid friction member and lower friction member from contacting non-uniform phenomenon, and then it is uneven to avoid contact with face stress distribution using two upper friction members 10；The present apparatus can study the changing rule of frictional force, displacement, normal force, speed under the relevant parameters such as friction member, different normal force, the friction speed of different materials, to study the mechanism of production and influence factor of stick-slip.
Description
Technical field
The invention belongs to tribology technology fields, and in particular to a kind of stick-slip experimental rig.
Background technique
Stick-slip is that under certain condition, one kind due to caused by static and dynamic friction coefficient numerical value is different " is transported static-dynamic
Only-move again-it is static again " friction phenomenon, be occur two mutually sliding object between a kind of friction self-excitation jumping.
As a kind of typical friction phenomenon, stick-slip is widely present in mechanical system, it is the main cause that system generates vibration
One of because, there is squeal-noise, numerically-controlled machine tool low speed in braking system when can bring mechanical system flutter, limit cycles oscillations, brake
When machining accuracy be deteriorated etc. numerous negative issues.Therefore it in order to improve mechanical system stability and reduce vibration, improves lathe and adds
Work precision reduces frictional vibration noise and then development environment friendly motor vehicle braking system, and the tribology for carrying out stick-slip is special
Property correlative study work, such as friction force signal, displacement signal, normal direction force signal during stick-slip etc. have very
Important meaning.
Currently, focusing mostly on both at home and abroad about the research of stick-slip in numerically modeling, lack verification experimental verification.Therefore needle is developed
Stick-slip phenomenon is furtherd investigate to the new method and its device of stick-slip test, and then by test, for rich
Rich and development stick-slip correlation theory has important science and theoretical value, viscous to occurring in reduction actual mechanical system
The problem of sliding movement is caused improves the relevant design of mechanical equipment, and improving its performance and service life, energy saving etc. has very
Important realistic meaning and engineering application value.
Summary of the invention
The purpose of the present invention is to provide a kind of stick-slip experimental rig, it can simulate that there may be stick-slip hidden danger
Different mechanical systems real working condition, by acquire different materials friction member in parameters such as different normal force, friction speeds
Lower frictional force, displacement, the variation of normal force, speed signal are analyzed the mechanism of production and influence factor of stick-slip, are set for machinery
Standby optimization design provides theory support.
The technical solution of the present invention is as follows:
The bottom top plate 1A of a kind of stick-slip experimental rig, including base 1, base 1 is equipped with two-dimensional movement platform 2, machine
Rotating device 3 is installed on the bottom plate 1B of seat 1,
Lower friction member 11 is installed, the speed and direction that lower friction member 11 is set according to rotating device 3 carry out on rotating device 3
Rotation；
2 bottom of two-dimensional movement platform is fixed with strain force sensor 14, and the bottom of strain force sensor 14 is provided with
The ring flange 4 for contacting and fixing；
Encoder 5, fixing axle 6 and crossbeam 7 are additionally provided between the ring flange 4 and rotating device 3, fixing axle 6 passes through
The centre bore of encoder 5 is simultaneously fixed thereto, and one end of fixing axle 6 is fixed on the inner hole of ring flange 4, and the other end is fixed on crossbeam 7
Central bore, torsionspring 13 is additionally provided between crossbeam 7 and fixing axle 6,13 one end of torsionspring is mounted in crossbeam 7
Near intracardiac hole, the other end is mounted in 6 bottom end card slot of fixing axle；
7 lower surface two sides of crossbeam are symmetrically fixed with two strain-type friction force sensors 8, two strain-type frictional force sensings
Device 8 is respectively fixedly connected with two fixtures 9, clamping one upper friction member 10 on each fixture 9；
Two upper friction members 10 are in contact with lower friction member 11；
Two-dimensional movement platform 2, strain force sensor 14, rotating device 3 are electrically connected to the control system, and two strain-types rub
It wipes force snesor 8 to be electrically connected with signal testing analysis system, encoder 5 and calculating mechatronics.
Specifically, the rotating device 3 includes:
The the first synchronous pulley 3A and the second synchronous pulley 3D being fixed on the bottom plate 1B of base 1；
Servo motor 3B is provided on first synchronous pulley 3A, servo motor 3B is connect by axis with the first synchronous pulley 3A
And drive the first synchronous pulley 3A rotation；
First synchronous pulley 3A is connected by synchronous belt 3C and the second synchronous pulley 3D and the second synchronous pulley 3D is driven to turn
It is dynamic；
The axis connection of workbench 3E, the second synchronous pulley 3D and workbench 3E are provided on second synchronous pulley 3D simultaneously
Workbench 3E rotation is driven, lower friction member 11 is placed on workbench 3E；
Shaft supporting frame 3F is fixed on the bearing that the second synchronous pulley 3D and workbench 3E is supported on the bottom plate 1B of base 1.
Specifically, the two-dimensional movement platform 2 includes:
It is fixed on the first stepper motor 2F of the bottom top plate 1A of base 1；
The vertical ball screw device 2E being connect with the output shaft of the first stepper motor 2F by shaft coupling；
The vertical slipper 2A being mounted on the feed screw nut of ball screw device 2E, the bottom vertical slipper 2A are equipped with horizontal swallow
Stern notch guide rail 2B, the first stepper motor 2F drive vertical slipper 2A in vertical support guide rail 2G by vertical ball screw device 2E
On slide up and down along the vertical direction；
Vertical support the guide rail 2G, vertical slipper 2A for being fixed on the bottom top plate 1A of base 1 are mounted on vertical support guide rail
On 2G；
The bottom of the horizontal slider 2D being mounted on horizontal dovetail groove guide rail 2B, horizontal slider 2D and strain force snesor 14
Connection；
It is fixed on the second stepper motor 2H of the side vertical slipper 2A；
The horizontal lead screw device 2C that one end is connect with the output shaft of second stepper motor 2H by shaft coupling, horizontal lead screw dress
The feed screw nut for setting 2C fixes with horizontal slider 2D, and the feed screw nut by rotating horizontal lead screw device 2C can make horizontal slider 2D
It is moved in the horizontal direction on horizontal lead screw device 2C.
Specifically, the crossbeam 7 is connect with fixing axle 6 by angular contact ball bearing 12, the outer ring of angular contact ball bearing 12
It is interference fitted with the central bore of crossbeam 7, inner ring and fixing axle 6 are interference fitted.
Specifically, the fixing axle 6 is locked with ring flange 4 by the first lock-screw 4A, pass through the second lock with encoder 5
Tight screw 5A locking.
Specifically, being fixed between the encoder 5 and crossbeam 7 by Z-shape steel piece 5B.
Specifically, the strain-type friction force sensor 8 is unidirectional strain force sensor, range is 0~100N, sensitive
Degree is 0.3mv/V, linearity 0.1N.
Specifically, the encoder 5 be absolute type encoder, range be 0~360 °, resolution ratio be 10 ", precision be ±
20 ", baud rate 115.2Kb/s.
Specifically, 14 range of strain force sensor is 5~500N, precision 0.025N.
The method for carrying out viscosity sliding test using stick-slip experimental rig provided by the invention, way are as follows:
Control system control two-dimensional movement platform 2 moves in the horizontal and vertical directions so that upper friction member 10 is under
Friction member 11 is in contact, and control system is controlled rotating device 3 and rotated with the speed of setting and direction, so that upper friction member 10 is under
Relative friction is generated between friction member 11, during the test 14 real-time monitoring of strain force sensor and upper 10 He of friction member of acquisition
Normal load between lower friction member 11 feeds back to control system, and control system adjustment two-dimensional movement platform 2 makes friction member
The normal load of setting is kept between 10 and lower friction member 11, two friction force sensors 9 detect two upper friction members 10 respectively
Suffered frictional force simultaneously send collected friction force signal to data acquisition and analysis system；Encoder 5 acquires upper friction member 10
Angular displacement signal and angular displacement signal is sent to computer.
During viscosity sliding test, when the frictional force that upper friction member 10 is subject to is greater than the bullet that torsionspring 13 is generated by torsion
When spring force, upper friction member 10 is together with lower friction member 11 " viscous " and rotates, and upper friction member 10 and lower friction member 11 are without opposite fortune
It is dynamic.With the rotation of upper friction member 10, the windup-degree of torsionspring 13 constantly increases, and the spring force that upper friction member 10 is subject to is not
Disconnected to increase, when spring force is greater than frictional force, the upper beginning of friction member 10 is slided on lower 11 surface of friction member, upper 10 He of friction member
Lower friction member 11 has relative motion.With the sliding of upper friction member 10, the windup-degree of torsionspring 13 becomes smaller, and spring force is therewith
Reduce, when frictional force is greater than spring force again, upper friction member 10 is together with lower friction member 11 again " viscous " and rotates, and so recycles
Back and forth, the motion state of upper friction member 10 periodically alternately switches in " viscous ", " cunning ".
The friction dynamics characterized in stick-slip are obtained with computer and the analysis of data acquisition analysis system in the above method
Attribute testing result has: normal direction force-time curve, friction force-time curve during stick-slip, angular displacement-time are bent
Line, angular speed-time graph, angular displacement-angular speed curve.Normal force, frictional force, angular displacement and angular speed are that stick-slip is dynamic
The most important basic data of mechanical analysis, thus obtained normal direction force-time curve, friction force-time curve, angular displacement-when
Half interval contour, angular speed-time graph, angular displacement-angular speed curve are the key datas of stick-slip dynamics research, can be analyzed
Genesis mechanism and influence factor during stick-slip.
The invention has the benefit that device provided by the invention can study the friction member of different materials, different normal direction
The changing rule of frictional force, displacement, normal force, speed under the relevant parameters such as power, friction speed, to study the production of stick-slip
Life reason and influence factor, and then the vibration of mechanical system is reduced, system stability and machining accuracy are improved, and reduce stick-slip fortune
It is dynamic and induce frictional vibration noise the problems such as theoretical foundation is provided；Device provided by the invention uses two pins samples, i.e., two
A upper friction member can contact non-uniform phenomenon to avoid upper friction member and lower friction member, and then avoid contact with face stress distribution
Unevenly；Test material type of the present invention is relatively broad, including forged steel, cast iron, damping alloy, glass etc.；This test
Strain-type friction force sensor 8, encoder 5 and the Two-dimensional strain force snesor 14 that device uses belong to high-precision sensing
Device has measurement accuracy high, the characteristics of stabilization carefully.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of stick-slip experimental rig provided by the invention.
Specific embodiment
The present invention is described further in the following with reference to the drawings and specific embodiments.
Apparatus structure schematic diagram in the embodiment of the present invention is as shown in Figure 1, the bottom the top plate 1A installation two dimension of base 1 is moved
Platform 2 is moved, rotating device 3 is installed on the bottom plate 1B of base 1, lower friction member 11 is mounted on rotating device 3, strain force sensor
14 are fixed on the bottom of two-dimensional movement platform 2, and ring flange 4 is contacted and is fixed by screws in 14 bottom surface of strain force sensor
The bottom of strain force sensor 14, the centre bore that fixing axle 6 passes through encoder 5 is fixed thereto, and one end is fixed on ring flange 4
Inner hole, the other end are fixed on the central bore of crossbeam 7；13 one end of torsionspring is mounted near the central bore of crossbeam 7, another
End is mounted in 6 bottom end card slot of fixing axle, and two strain-type friction force sensors 8 are symmetrically fixed on 7 lower surface two sides of crossbeam, is led to
It crosses screw to fix, two fixtures 9 are fixedly connected with two strain-type friction force sensors 8 by screw respectively, two upper frictions
Part 10 is fixed by screws in respectively on two fixtures 9, and two upper friction members 10 are in contact with lower friction member 11, and two-dimensional movement is flat
Platform 2, strain force sensor 14, rotating device 3 are electrically connected to the control system, two strain-type friction force sensors 8 and signal
Detecting and analysing system electrical connection, encoder 5 and calculating mechatronics.
Wherein, the first synchronous pulley 3A in rotating device 3 and the second synchronous pulley 3D is fixed on the bottom plate 1B of base 1
On, servo motor 3B is provided on the first synchronous pulley 3A, servo motor 3B is connect and driven with the first synchronous pulley 3A by axis
Dynamic first synchronous pulley 3A rotation, the first synchronous pulley 3A are connected by synchronous belt 3C and the second synchronous pulley 3D and are driven second
Synchronous pulley 3D is rotated, and is provided with workbench 3E, the second synchronous pulley 3D and workbench 3E on the second synchronous pulley 3D
Axis connection simultaneously drives workbench 3E to rotate, and lower friction member 11 is placed on workbench 3E, and shaft supporting frame 3F is fixed on base 1
The bearing of the second synchronous pulley 3D and workbench 3E is supported on bottom plate 1B.
The first stepper motor 2F in two-dimensional movement platform 2 is fixed on the bottom top plate 1A of base 1, with the first stepper motor
The vertical ball screw device 2E that the output shaft of 2F is connected by shaft coupling is arranged in the first stepper motor 2F in the following, vertical slipper
2A is mounted on the feed screw nut of ball screw device 2E, and the bottom vertical slipper 2A is equipped with horizontal dovetail groove guide rail 2B, vertically
Supporting guide 2G is fixed on the bottom top plate 1A of base 1, and vertical slipper 2A is mounted on vertical support guide rail 2G；Horizontal slider 2D
It is mounted on horizontal dovetail groove guide rail 2B, the bottom of horizontal slider 2D and strain 14 thread connection of force snesor；Second stepping electricity
Machine 2H is fixed on the side of vertical slipper 2A；The output shaft of horizontal lead screw one end device 2C and second stepper motor 2H pass through shaft coupling
Device connection, feed screw nut and the horizontal slider 2D of horizontal lead screw device 2C are fixed.
Crossbeam 7 is connect with fixing axle 6 by angular contact ball bearing 12, in the outer ring of angular contact ball bearing 12 and crossbeam 7
Intracardiac hole interference fit, inner ring and fixing axle 6 are interference fitted.
Fixing axle 6 and ring flange 4 are locked by the first lock-screw 4A, are locked with encoder 5 by the second lock-screw 5A
Tightly.
Pass through Z-shape steel piece 5B screw attachment between encoder 5 and crossbeam 7.
In the present embodiment, strain-type friction force sensor 8 is unidirectional strain force sensor, and range is 0~100N, sensitive
Degree is 0.3mv/V, linearity 0.1N；Encoder 5 is absolute type encoder, and range is 0~360 °, and resolution ratio is 10 ", precision is
± 20 ", baud rate 115.2Kb/s；Strain force sensor 14 is Two-dimensional strain formula force snesor, and range is 5~500N, essence
Degree is 0.025N.
The course of work of the present embodiment is as follows:
A, the installation of sample
Two upper samples 10 are separately mounted in two fixtures 9, and through screw in compression in the inner hole of fixture 9.It will
Lower sample 11 is mounted on workbench 3E by screw.
B, stick-slip is tested
The movement of two-dimensional movement platform 2 in the horizontal and vertical directions is controlled by control system, makes strain-type power
Sensor 14 is fixed axis 6 keeps setting in turn method after compressing fixture 9 contacts friction member 10 and lower friction member 11
To load.Control system control rotating device 3 is rotated with the speed and direction of setting, so that upper friction member 10 and lower friction
Relative friction is generated between part 11.
During viscosity sliding test, when the frictional force that upper friction member 10 is subject to is greater than the bullet that torsionspring 13 is generated by torsion
When spring force, upper friction member 10 is together with lower friction member 11 " viscous " and rotates, and upper friction member 10 and lower friction member 11 are without opposite fortune
It is dynamic.With the rotation of upper friction member 10, the windup-degree of torsionspring 13 constantly increases, and the spring force that upper friction member 10 is subject to is not
Disconnected to increase, when spring force is greater than frictional force, the upper beginning of friction member 10 is slided on lower 11 surface of friction member, upper 10 He of friction member
Lower friction member 11 has relative motion.With the sliding of upper friction member 10, the windup-degree of torsionspring 13 becomes smaller, and spring force is therewith
Reduce, when frictional force is greater than spring force again, upper friction member 10 is together with lower friction member 11 again " viscous " and rotates, and so recycles
Back and forth, the motion state of upper friction member 10 periodically alternately switches in " viscous ", " cunning ".
C, the data acquisition of stick-slip test
While carrying out stick-slip test, 14 real-time monitoring of Two-dimensional strain formula force snesor simultaneously acquires stick-slip
Normal load, and normal direction force signal is sent to computer.Two friction force sensors 9 are tested respectively suffered by two upper friction members 10
Frictional force, and friction force signal is sent to data acquisition and analysis system.Encoder 5 acquires the angular displacement signal of upper friction member 10,
And angular displacement signal is sent to computer.
In viscosity sliding test, normal load when the 14 real-time monitoring stick-slip of force snesor of Two-dimensional strain formula sends number to
According to control system, real-time feedback control is carried out by vertical position of the control system to two-dimensional movement platform 2, it is ensured that upper friction member 10
Normal load between lower friction member 11 is in constant given value always.
Upper friction member 10 and fixture 9, crossbeam 7, encoder 5 are rigid connection, the rotation angle and volume of upper friction member 10
The rotation angle of code device 5 is identical, and while carrying out viscosity sliding test, the angle position of upper friction member 10 can be acquired by encoder 5
Shifting signal.The strain-type friction force sensor 8 for being mounted on 7 both ends of crossbeam simultaneously measures the frictional force of two upper friction members 10 respectively
Signal.
Different test parameters is given, the stick-slip test under different operating conditions can be carried out.For different shape and ruler
Test can be completed using corresponding fixture 9 in very little upper friction member 10.
This experimental rig, which controls two-dimensional movement platform 2 by control system, makes strain force sensor 14 be fixed axis 6
And then compressing fixture 9, and pass through the Real-time Feedback of strain force sensor 14, it is permanent between upper friction member 10 and lower friction member 11
Surely apply any normal load in 14 range ability of strain force sensor of setting.In addition, control system passes through rotation
Device 3 controls lower friction member 11 and rotates at different rates.
Stick-slip be due to static and dynamic friction coefficient numerical value it is different caused by one kind " move it is-static-move again-it is quiet again
Friction phenomenon only ", in this experimental rig, with the difference of the motion state of upper friction member 10, the rotation of torsionspring 13
The difference of angle, motion state cyclically-varying in " viscous ", " cunning " the two of friction member 10 in realization, and pass through two strains
Formula friction force sensor 8 acquires the friction force signals of two upper friction members 10 respectively, and encoder 5 acquires angular displacement signal and goes forward side by side one
Step obtains angular velocity signal, and Two-dimensional strain formula force snesor 14 acquires normal direction force signal.
Strain-type friction force sensor 8, encoder 5 and the Two-dimensional strain force snesor 14 that this experimental rig uses belong to
In high-precision sensor, there is measurement accuracy height, the good feature of stability.
This experimental rig can effectively avoid friction member 10 and lower friction member 11 from contacting using two upper friction members 10
Non-uniform phenomenon, and then it is uneven to avoid contact with face stress distribution, available more accurate frictional force, angular displacement, normal direction
The signals such as power preferably study stick-slip tribological property.
This experimental rig can study friction force signal during the stick-slip of a variety of differentiated friction auxiliary materials, angle position
The changing rule of shifting signal, normal direction force signal, comprising: forged steel, cast iron, damping alloy, glass etc., be related to test material type compared with
It is extensive.
Those skilled in the art disclosed the technical disclosures can make various do not depart from originally according to the present invention
Various other specific variations and combinations of essence are invented, these variations and combinations are still within the scope of the present invention.
Claims (9)
1. a kind of stick-slip experimental rig, including base (1), it is flat that bottom top plate (1A) of base (1) is equipped with two-dimensional movement
Platform (2) is equipped with rotating device (3) on the bottom plate (1B) of base (1), which is characterized in that
It is installed on rotating device (3) lower friction member (11), the speed and direction that lower friction member (11) sets according to rotating device (3)
It is rotated；
Two-dimensional movement platform (2) bottom is fixed with strain force sensor (14), the bottom setting of strain force sensor (14)
There is the ring flange (4) for contacting and fixing；
Encoder (5), fixing axle (6) and crossbeam (7), fixing axle are additionally provided between the ring flange (4) and rotating device (3)
(6) across the centre bore of encoder (5) and fixed thereto, one end of fixing axle (6) is fixed on the inner hole of ring flange (4), another
End is fixed on the central bore of crossbeam (7), and torsionspring (13), torsionspring are additionally provided between crossbeam (7) and fixing axle (6)
(13) one end is mounted near the central bore of crossbeam (7), and the other end is mounted in the card slot of fixing axle (6) bottom end；
Crossbeam (7) lower surface two sides are symmetrically fixed with two strain-type friction force sensors (8), two strain-type frictional force sensings
Device (8) is respectively fixedly connected with two fixtures (9), clamping one upper friction member (10) on each fixture (9)；
It is in contact with lower friction member (11) for two upper friction member (10)；
Two-dimensional movement platform (2), strain force sensor (14), rotating device (3) are electrically connected to the control system, two strain-types
Friction force sensor (8) is electrically connected with signal testing analysis system, encoder (5) and calculating mechatronics.
2. stick-slip experimental rig according to claim 1, which is characterized in that the rotating device (3) includes:
The first synchronous pulley (3A) and the second synchronous pulley (3D) being fixed on the bottom plate (1B) of base (1)；
It is provided on first synchronous pulley (3A) servo motor (3B), servo motor (3B) passes through axis and the first synchronous pulley (3A)
It connects and the first synchronous pulley (3A) is driven to rotate；
First synchronous pulley (3A) is connected by synchronous belt (3C) and the second synchronous pulley (3D) and drives the second synchronous pulley
(3D) rotation；
It is provided on second synchronous pulley (3D) workbench (3E), the axis of the second synchronous pulley (3D) and workbench (3E) connect
It connects and workbench (3E) is driven to rotate, the upper surface of workbench (3E) is fixed lower friction member (11)；
Shaft supporting frame (3F), which is fixed on, supports the second synchronous pulley (3D) and workbench (3E) on the bottom plate (1B) of base (1)
Bearing.
3. stick-slip experimental rig according to claim 1, which is characterized in that the two-dimensional movement platform (2) includes:
It is fixed on first stepper motor (2F) of bottom top plate (1A) of base (1)；
The vertical ball screw device (2E) being connect with the output shaft of the first stepper motor (2F) by shaft coupling；
The vertical slipper (2A) being mounted on the feed screw nut of ball screw device (2E), the vertical slipper bottom (2A) are equipped with level
Dovetail groove guide rail (2B)；
It is fixed on the vertical support guide rail (2G) of bottom top plate (1A) of base (1), vertical slipper (2A) is mounted on vertical support
On guide rail (2G), the first stepper motor (2F) is by vertical ball screw device (2E) driving vertical slipper (2A) in vertical support
It is slided up and down along the vertical direction on guide rail (2G)；
It is mounted on the level that can be slided on horizontal dovetail groove guide rail (2B) and in the horizontal direction on horizontal dovetail groove guide rail (2B)
The bottom of sliding block (2D), horizontal slider (2D) is connect with strain force snesor (14)；
It is fixed on the second stepper motor (2H) of the side vertical slipper (2A)；
The horizontal lead screw device (2C) that one end is connect with the output shaft of second stepper motor (2H) by shaft coupling, horizontal lead screw dress
The feed screw nut and horizontal slider (2D) for setting (2C) are fixed, and the feed screw nut by rotating horizontal lead screw device (2C) can make level
Sliding block (2D) moves in the horizontal direction on horizontal lead screw device (2C).
4. stick-slip experimental rig according to claim 1, which is characterized in that the crossbeam (7) and fixing axle (6) are logical
Angular contact ball bearing (12) connection is crossed, the outer ring of angular contact ball bearing (12) and the central bore of crossbeam (7) are interference fitted, in
Circle is interference fitted with fixing axle (6).
5. stick-slip experimental rig according to claim 1, which is characterized in that the fixing axle (6) and ring flange (4)
It is locked by the first lock-screw (4A), is locked with encoder (5) by the second lock-screw (5A).
6. a kind of stick-slip experimental rig according to claim 1, which is characterized in that the encoder (5) and crossbeam
(7) pass through Z-shape steel piece (5B) screw attachment between.
7. a kind of stick-slip experimental rig according to claim 1, which is characterized in that the strain-type frictional force sensing
Device (8) is unidirectional strain force sensor, and range is 0~100N, sensitivity 0.3mv/V, linearity 0.1N.
8. a kind of stick-slip experimental rig according to claim 1, which is characterized in that the encoder (5) is absolute
Formula encoder, range are 0~360 °, and resolution ratio is 10 ", precision is ± 20 ", baud rate 115.2Kb/s.
9. a kind of stick-slip experimental rig according to claim 1, which is characterized in that the strain force sensor
(14) range is 5~500N, precision 0.025N.
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| CN108195538B (en) * | 2018-02-08 | 2023-11-24 | 西南交通大学 | Test bed for researching recovery efficiency of friction vibration energy |
| CN109883700B (en) * | 2019-03-27 | 2021-03-05 | 武汉理工大学 | Water-lubricated rubber tail bearing friction vibration testing system and method thereof |
| CN112577892B (en) * | 2020-12-11 | 2024-03-12 | 中国汽车工程研究院股份有限公司 | Gear rack type loading compression bar of material friction abnormal sound test bed |
| CN112710602A (en) * | 2020-12-24 | 2021-04-27 | 中国汽车工程研究院股份有限公司 | Material friction abnormal sound test bed with three-dimensional force sensor |
| CN112730215A (en) * | 2020-12-24 | 2021-04-30 | 中国汽车工程研究院股份有限公司 | Material friction abnormal sound test bed with strain gauge sensor |
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| CN102680083B (en) * | 2012-06-11 | 2013-10-16 | 西南交通大学 | Method for testing and analyzing frictional noise and test device for method |
| JP5912941B2 (en) * | 2012-07-10 | 2016-04-27 | 協和界面科学株式会社 | Friction test equipment |
| CN104018821B (en) * | 2014-04-28 | 2017-05-24 | 安徽多杰电气有限公司 | Flexible torque control system capable of eliminating stick-slip vibration of drill column and control method |
| CN105004499B (en) * | 2015-05-29 | 2018-04-10 | 中国石油大学(北京) | A kind of testing stand for testing underground drill stem stick slip vibration mechanical characteristic |
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