CN103743668A - Device and method for testing lateral impact friction - Google Patents
Device and method for testing lateral impact friction Download PDFInfo
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- CN103743668A CN103743668A CN201410042646.6A CN201410042646A CN103743668A CN 103743668 A CN103743668 A CN 103743668A CN 201410042646 A CN201410042646 A CN 201410042646A CN 103743668 A CN103743668 A CN 103743668A
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Abstract
The invention discloses a device and a method for testing lateral impact friction. The device for testing lateral impact friction factors comprises a pneumatic pump, a pneumatic impact device, an arc-shaped rail, an incidence column, a clamp, a support, truckles, an acceleration sensor, a speed sensor, a first strainmeter, a second strainmeter, a first test sample, a second test sample, a transmission column, a belt pulley, a shock absorber, a belt, a variable-frequency motor, a signal acquisition device and a computer. Due to the arrangement of the truckles at the bottoms of the pneumatic impact device and the support, the pneumatic impact device and the support can move on the arc-shaped rail so as to regulate the impact incidence angles of the test samples. Lateral impact friction of materials can be tested by the device. The shapes of the test samples which are used in the invention can be changed, so that the lateral impact friction properties of different types of materials can be tested.
Description
Technical field
The present invention relates to a kind of side friction testing arrangement and method of testing, be specifically related to a kind of device and method that can directly measure impulsive force, impulsive torque, impact velocity, impact acceleration and friction factor in material side impact process.
Background technology
Impact friction is the mantle friction that two each and every one solid surface dynamic impacts cause.In all kinds of machinery, many parts are all bearing impact friction in various degree, in the bowl mill course of work of field, colliery, all exist dynamic side friction between steel ball and cylinder, material.Proving installation for impact friction characteristic in material side knockout process is not yet found, brings very large inconvenience to side friction testing.
Therefore, develop a kind of handled easily, can directly measure the device of impact friction characteristic in material surface side impact process, for better evaluating material side rubbing characteristics provides experimental technique.
Summary of the invention
The present invention is directed to the deficiencies in the prior art and propose a kind of device and method that can directly measure material side impact friction characteristic.
The present invention solves the problems of the technologies described above the technical scheme of taking to be:
A kind of side friction testing arrangement, described side friction factor proving installation comprises air lift pump (01), Pneumatic immpacting device (02), arc orbit (03), incident bar (04), jig (05), bearing (06), steamboat (07), acceleration transducer (08), speed pickup (09), the first strainometer (10), the second strainometer (11), the first sample (12), the second sample (13), transmission bar (14), belt pulley (15), vibroshock (16), belt (17), variable-frequency motor (18), signal pickup assembly (19) and computing machine (20), incident bar (04) is connected incident bar (04) can be moved with circumferencial direction vertically by sliding bearing with bearing (06), transmission bar (14) is connected by rolling bearing with bearing (06), Pneumatic immpacting device (02) and incident bar (04) coaxial line, and incident bar (04) and transmission bar (14) are not coaxial, and both have angle theta by axis, steamboat (07) is equipped with in bearing (06) bottom of Pneumatic immpacting device (02), support incident bar can be mobile at arc-shaped rail (03), the incidence angle θ impacting to adjust the first sample (12), jig (05) is housed with the fixing position of steamboat on track, guarantees the constant of incident angle in side process, the cross section of the first sample (12) being connected with incident bar (04) need process in 90 °-θ with axial angle, the cross section of the second sample (13) enough covers the cross section of the first sample (12), on incident bar (04), from left to right have successively magnetic acceleration transducer (08), speed pickup (09), the first strainometer (10), the second strainometer (11), acceleration transducer (08), speed pickup (09) are used for respectively measuring acceleration, the speed of the first sample (12) side, the first strainometer (10) is used for measuring the forward strain of sample side friction process, and the second strainometer (11) is used for measuring the shear strain in sample frontal impact friction process, the first strainometer (10) is near the left side of incident bar (04), and the second strainometer (11) is near the right side of incident bar (04), the accuracy that is used for improving measurement result.
Described side friction testing arrangement, the end of incident bar (04) and transmission bar (14) can connect first sample (12) of the various shape that comprises circle, annular, the multi-form side friction pair that the second sample (13) forms by profile.
Described side friction testing arrangement, is screwed with the axial play that four screws stop the first sample (12), the second sample (13) on the end face of cylinder of incident bar (04) and transmission bar (14).
Described side friction testing arrangement, the angular velocity that transmission bar (14) rotates can be by regulating the rotating speed of variable-frequency motor (18) to regulate.
, there is the gap of 1-3mm in described side friction testing arrangement, to simulate side impact process between the first sample (12) and the second sample (13).
Described side friction testing arrangement, the first sample (12), the second sample (13) cross-sections surfaces also can be smeared the operating mode that some lubricants are simulated wet friction.
Described side friction testing arrangement, is provided with 1-3mm gap between transmission bar (14) right-hand member and vibroshock (16), and vibroshock (16) can reduce concussion and the impact to bearing of transmission bar in impact process (14).
A side friction testing method, take annular shock surface as example explanation, and skilful, to represent respectively ingeniously annular path, large footpath, comprise the following steps:
1) before experiment, to do certain polishing pre-service to sample surface of friction pair, make its surfaceness reach Ra=0.07 μ m, to judge in side process whether produce relative sliding, whether have kinetic friction.
2) the first sample (12) and the second sample (13) are installed, start variable-frequency motor (18), Pneumatic immpacting device (02) impacts incident bar (04), and signal pickup assembly records acceleration transducer in experimentation (08), speed pickup (09), the first strainometer 10) and the variation of the second strainometer (11); The first strainometer (10) records normal strain ε, and the second strainometer (11) records shear strain γ;
3) impact velocity, acceleration are directly recorded by speed pickup, acceleration transducer; Impulsive force, impulsive torque and friction factor obtain by normal strain ε, the shear strain γ derivation of equation; Computing machine (20) gathers the data obtained in frontal impact process, according to theory, derives and simulates the change curve of impulsive force, impulsive torque, impact velocity, acceleration and friction factor in frontal impact process;
Incident bar normal stress: σ=E ε, wherein E represents incident bar elastic modulus;
Incident bar surface shearing stress: τ=G γ, wherein G represents the shear modulus of incident bar;
Impulsive force: F=σ A, wherein A=π R
2, R represents incident bar radius;
Impulsive torque:
wherein
τ represents incident bar surface shearing stress, I
rrepresent the polar moment of inertia of incident bar xsect to the center of circle;
Friction factor is derived and is obtained by following theoretical formula by normal strain ε, shear strain γ:
Sample impacts cross section normal stress:
wherein
s
arepresent that sample impacts area of section;
Sample impacts the average shearing stress in cross section:
wherein
τ
rrepresent to impact the shearing stress of the arbitrfary point that the Shang Ju center of circle, cross section is r, I
arepresent that sample impacts the polar moment of inertia of xsect to the center of circle;
The suffered average shearing stress of sample equals friction force, friction factor:
The invention has the beneficial effects as follows: the present invention can realize side rub measurement between material; The shape of the sample using in the present invention can be changed, and can realize the mensuration of side rubbing characteristics between dissimilar material.
Accompanying drawing explanation
Fig. 1 is the structural representation of side friction testing arrangement of the present invention.
Fig. 2 is the detail view that incident bar in Fig. 1 (04) is connected with sample with transmission bar (14) end.
Fig. 3 is the first sample (12), the second sample (13) structural representation.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Refer to Fig. 1 and Fig. 2, a side friction testing arrangement, comprises air lift pump 01, Pneumatic immpacting device 02, arc-shaped rail 03, incident bar 04, bearing 06, acceleration transducer 08, speed pickup 09, the first strainometer 10, the second strainometer 11, the first sample 12, the second sample 13, transmission bar 14, belt pulley 15, vibroshock 16, belt 17, variable-frequency motor 18, computing machine 20 and signal pickup assembly 19; Incident bar 04 is connected incident bar 04 can be moved with circumferencial direction vertically by sliding bearing with bearing 06; Transmission bar 14 is connected by rolling bearing with bearing 06, Pneumatic immpacting device 02 and incident bar 04 coaxial line, and incident bar 04 and transmission bar 14 are not coaxial, and both have angle theta by axis; Bearing 06 bottom of Pneumatic immpacting device 02, support incident bar is equipped with steamboat 07 and can be moved at arc-shaped rail 03, the incidence angle θ impacting to adjust the first sample 12; Jig 05 is housed with the fixing position of steamboat on track, guarantees the constant of incident angle in side process; The cross section of the first sample 12 being connected with incident bar 04 need process in 90 °-θ with axial angle; The cross section of the second sample 13 enough covers the cross section of the first sample 12.On incident bar 04, from left to right have successively magnetic acceleration transducer 08, speed pickup 09, the first strainometer 10, the second strainometer 11; Acceleration transducer 08, speed pickup 09 are used for respectively measuring acceleration, the speed of the first sample 12 sides; The first strainometer 10 is used for measuring the forward strain of sample side friction process, and the second strainometer 11 is used for measuring the shear strain in sample frontal impact friction process; The first strainometer 10 is near the left side of incident bar 04, and the second strainometer 11 is near the right side of incident bar 04, the accuracy that is used for improving measurement result; Between the first sample 12 and the second sample 13, there is suitable gap 1-3mm, so that simulation side impact process.Wherein the end appearance size of incident bar 04 and transmission bar 14 is identical.Its end round section has foursquare hole slot, and the surrounding of depression bar cylindrical cross-section is uniformly distributed four threaded holes, coordinates four bolts 21, to clamp fixedly sample, stops the axial play of the first sample 12, the second sample 13 in side process.The shape of the first sample 12, the second sample 13 as shown in Figure 3, can be simulated multi-form side friction pair according to the joint geometry of sample.
By regulating the impact strength of Pneumatic immpacting device 02, the loading of giving incident bar 04 varying strength, measures incident bar 04 pressure intensity by the first strainometer 10, and quantitative simulation is analyzed the side friction of experiment material varying strength; The rotating speed that regulates variable-frequency motor 18, regulates different initial relative velocities, simulates different actual conditions.Vibroshock 16 can reduce concussion and the impact to bearing of transmission bar 14 in impact process.
Refer to Fig. 1, incident bar 04 and transmission bar 14 are uniformly distributed support by two bearings 06 respectively, to increase the stability of depression bar in experimentation, reduce the error of experimental result.
Impact velocity, impact acceleration Negotiation speed sensor, acceleration transducer directly record; Impulsive force, impulsive torque obtain by following theoretical derivation that (the annular shock surface of upper left in Fig. 3 of take is example explanation, r by normal strain ε, shear strain γ
1, r
2represent respectively the path of annular, large footpath):
Incident bar normal stress: σ=E ε (wherein E represents incident bar elastic modulus)
Incident bar surface shearing stress: τ=G γ (wherein G represents the shear modulus of incident bar)
Impulsive force: F=σ A (A=π R wherein
2, R represents incident bar radius)
Impulsive torque:
(wherein
τ represents incident bar surface shearing stress, I
rrepresent the polar moment of inertia of incident bar xsect to the center of circle)
Friction factor is derived and is obtained by following theoretical formula by normal strain ε, shear strain γ:
Sample impacts cross section normal stress:
(wherein
s
arepresent that sample impacts area of section)
Sample impacts the average shearing stress in cross section:
(wherein
τ
rrepresent to impact the shearing stress of the arbitrfary point that the Shang Ju center of circle, cross section is r, I
arepresent that sample impacts the polar moment of inertia of xsect to the center of circle);
The suffered average shearing stress of sample equals friction force, friction factor:
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (8)
1. a side friction testing arrangement, it is characterized in that: described side friction factor proving installation comprises air lift pump (01), Pneumatic immpacting device (02), arc orbit (03), incident bar (04), jig (05), bearing (06), steamboat (07), acceleration transducer (08), speed pickup (09), the first strainometer (10), the second strainometer (11), the first sample (12), the second sample (13), transmission bar (14), belt pulley (15), vibroshock (16), belt (17), variable-frequency motor (18), signal pickup assembly (19) and computing machine (20), incident bar (04) is connected incident bar (04) can be moved with circumferencial direction vertically by sliding bearing with bearing (06), transmission bar (14) is connected by rolling bearing with bearing (06), Pneumatic immpacting device (02) and incident bar (04) coaxial line, and incident bar (04) and transmission bar (14) are not coaxial, and both have angle theta by axis, steamboat (07) is equipped with in bearing (06) bottom of Pneumatic immpacting device (02), support incident bar can be mobile at arc-shaped rail (03), the incidence angle θ impacting to adjust the first sample (12), jig (05) is housed with the fixing position of steamboat on track, guarantees the constant of incident angle in side process, the cross section of the first sample (12) being connected with incident bar (04) need process in 90 °-θ with axial angle, the cross section of the second sample (13) enough covers the cross section of the first sample (12), on incident bar (04), from left to right have successively magnetic acceleration transducer (08), speed pickup (09), the first strainometer (10), the second strainometer (11), acceleration transducer (08), speed pickup (09) are used for respectively measuring acceleration, the speed of the first sample (12) side, the first strainometer (10) is used for measuring the forward strain of sample side friction process, and the second strainometer (11) is used for measuring the shear strain in sample frontal impact friction process, the first strainometer (10) is near the left side of incident bar (04), and the second strainometer (11) is near the right side of incident bar (04), the accuracy that is used for improving measurement result.
2. side friction testing arrangement as claimed in claim 1, is characterized in that: the end of incident bar (04) and transmission bar (14) can connect first sample (12) of the various shape that comprises circle, annular, the multi-form side friction pair that the second sample (13) forms by profile.
3. side friction testing arrangement as claimed in claim 1, is characterized in that: on the end face of cylinder of incident bar (04) and transmission bar (14), be screwed with the axial play that four screws stop the first sample (12), the second sample (13).
4. side friction testing arrangement as claimed in claim 1, is characterized in that: the angular velocity that transmission bar (14) rotates can be by regulating the rotating speed of variable-frequency motor (18) to regulate.
5. side friction testing arrangement as claimed in claim 1, is characterized in that: between the first sample (12) and the second sample (13), have the gap of 1-3mm, so that simulation side impact process.
6. side friction testing arrangement as claimed in claim 1, is characterized in that: the first sample (12), the second sample (13) cross-sections surfaces also can be smeared the operating mode that some lubricants are simulated wet friction.
7. side friction testing arrangement as claimed in claim 1, it is characterized in that: between transmission bar (14) right-hand member and vibroshock (16), be provided with 1-3mm gap, vibroshock (16) can reduce concussion and the impact to bearing of transmission bar in impact process (14).
8. a side friction testing method, take annular shock surface as example explanation, r
1, r
2represent respectively the path of annular, large footpath, it is characterized in that, comprise the following steps:
1) before experiment, to do certain polishing pre-service to sample surface of friction pair, make its surfaceness reach Ra=0.07 μ n, to judge in side process whether produce relative sliding, whether have kinetic friction.
2) the first sample (12) and the second sample (13) are installed, start variable-frequency motor (18), Pneumatic immpacting device (02) impacts incident bar (04), and signal pickup assembly records acceleration transducer in experimentation (08), speed pickup (09), the first strainometer 10) and the variation of the second strainometer (11); The first strainometer (10) records normal strain ε, and the second strainometer (11) records shear strain γ;
3) impact velocity, acceleration are directly recorded by speed pickup, acceleration transducer; Impulsive force, impulsive torque and friction factor obtain by normal strain ε, the shear strain γ derivation of equation; Computing machine (20) gathers the data obtained in frontal impact process, according to theory, derives and simulates the change curve of impulsive force, impulsive torque, impact velocity, acceleration and friction factor in frontal impact process;
Incident bar normal stress: σ=E ε, wherein E represents incident bar elastic modulus;
Incident bar surface shearing stress: τ=G γ, wherein G represents the shear modulus of incident bar;
Impulsive force: F=σ A, wherein A=π R
2, R represents incident bar radius;
Impulsive torque:
wherein
τ represents incident bar surface shearing stress, I
rrepresent the polar moment of inertia of incident bar xsect to the center of circle;
Friction factor is derived and is obtained by following theoretical formula by normal strain ε, shear strain γ:
Sample impacts cross section normal stress:
wherein
s
arepresent that sample impacts area of section;
Sample impacts the average shearing stress in cross section:
wherein
τ
rrepresent to impact the shearing stress of the arbitrfary point that the Shang Ju center of circle, cross section is r, I
arepresent that sample impacts the polar moment of inertia of xsect to the center of circle;
The suffered average shearing stress of sample equals friction force, friction factor:
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| CN201410042646.6A CN103743668B (en) | 2014-01-29 | 2014-01-29 | Side impact friction testing device and testing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458566A (en) * | 2014-12-05 | 2015-03-25 | 中国矿业大学 | High-speed and fretting-friction testing apparatus for steel wire ropes |
| CN107702877A (en) * | 2017-09-25 | 2018-02-16 | 王宗 | A kind of outdoor anti-collision type ground fire hydrant crashworthiness experimental rig |
| CN109900407A (en) * | 2019-03-19 | 2019-06-18 | 中国林业科学研究院木材工业研究所 | The measuring device and method of frictional force when high-speed cutting between tool surface and timber |
| CN110823343A (en) * | 2018-08-10 | 2020-02-21 | 河南工业大学 | Granary detection method and system based on bottom surface single-circle large-small value polynomial model |
| CN113183183A (en) * | 2021-05-10 | 2021-07-30 | 清华大学深圳国际研究生院 | Friction measuring device and method for rope-driven mechanical arm |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3416973A1 (en) * | 1983-05-09 | 1984-11-22 | Vianova Kunstharz Ag, Werndorf | Method for the quantitative characterisation of organic coatings when subjected to a load like that of chips of stone, and arrangement for implementing the method |
| CN101504347A (en) * | 2008-02-04 | 2009-08-12 | 西北工业大学 | Material dynamic double-pressing and shearing experimental device based on Hopkinson rod |
| CN201340368Y (en) * | 2009-01-22 | 2009-11-04 | 中国人民解放军国防科学技术大学 | Dynamic frictional coefficient tester |
| CN102169069A (en) * | 2011-05-30 | 2011-08-31 | 浣石 | Three-dimensional impact loading experiment device |
-
2014
- 2014-01-29 CN CN201410042646.6A patent/CN103743668B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3416973A1 (en) * | 1983-05-09 | 1984-11-22 | Vianova Kunstharz Ag, Werndorf | Method for the quantitative characterisation of organic coatings when subjected to a load like that of chips of stone, and arrangement for implementing the method |
| CN101504347A (en) * | 2008-02-04 | 2009-08-12 | 西北工业大学 | Material dynamic double-pressing and shearing experimental device based on Hopkinson rod |
| CN201340368Y (en) * | 2009-01-22 | 2009-11-04 | 中国人民解放军国防科学技术大学 | Dynamic frictional coefficient tester |
| CN102169069A (en) * | 2011-05-30 | 2011-08-31 | 浣石 | Three-dimensional impact loading experiment device |
Non-Patent Citations (4)
| Title |
|---|
| H. D. ESPINOSA ET AL.: ""A Novel Dynamic Friction Experiment Using a Modified"", 《EXPENRNENTAL MECHANICS》 * |
| S. RAJAGOPALAN ET AL.: "A Modified Torsional Kolsky Bar for Investigating Dynamic Friction", 《EXPERIMENTAL MECHANICS》 * |
| VIKAS PRAKASH: "A Pressure-shear Plate Impact Experiment for Investigating Transient Friction", 《EXPERIMENTAL MECHANICS》 * |
| 林玉亮 等: "冲击加载条件下材料之间摩擦系数的确定", 《摩擦学学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458566A (en) * | 2014-12-05 | 2015-03-25 | 中国矿业大学 | High-speed and fretting-friction testing apparatus for steel wire ropes |
| CN104458566B (en) * | 2014-12-05 | 2017-06-16 | 中国矿业大学 | A kind of steel wire rope high speed and fine motion friction test device |
| CN107702877A (en) * | 2017-09-25 | 2018-02-16 | 王宗 | A kind of outdoor anti-collision type ground fire hydrant crashworthiness experimental rig |
| CN110823343A (en) * | 2018-08-10 | 2020-02-21 | 河南工业大学 | Granary detection method and system based on bottom surface single-circle large-small value polynomial model |
| CN110823343B (en) * | 2018-08-10 | 2021-04-09 | 河南工业大学 | Granary detection method and system based on bottom surface single-circle large-small value polynomial model |
| CN109900407A (en) * | 2019-03-19 | 2019-06-18 | 中国林业科学研究院木材工业研究所 | The measuring device and method of frictional force when high-speed cutting between tool surface and timber |
| CN113183183A (en) * | 2021-05-10 | 2021-07-30 | 清华大学深圳国际研究生院 | Friction measuring device and method for rope-driven mechanical arm |
| CN113183183B (en) * | 2021-05-10 | 2023-09-08 | 清华大学深圳国际研究生院 | Rope-driven mechanical arm friction measurement device and method |
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