CN101625305A - Heavy-load sliding friction testing machine - Google Patents
Heavy-load sliding friction testing machine Download PDFInfo
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- CN101625305A CN101625305A CN200910183208A CN200910183208A CN101625305A CN 101625305 A CN101625305 A CN 101625305A CN 200910183208 A CN200910183208 A CN 200910183208A CN 200910183208 A CN200910183208 A CN 200910183208A CN 101625305 A CN101625305 A CN 101625305A
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- main shaft
- chain wheel
- motor
- testing machine
- foil gauge
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Abstract
The invention relates to a heavy-load sliding friction testing machine mainly comprising a transmission system, a loading system and a data collecting system. The transmission system consists of a motor, a transducer, a speed reducer, a chain wheel transmission mechanism, a spindle, a spindle bearing and a shaft coupler; the loading system consists of a clamp and a pressure machine; the data collecting system consists of a data collecting card, a computer, a strain sheet and an oil pressure sensor; the motor is connected with the chain wheel transmission mechanism through an output shaft of the speed reducer; the chain wheel transmission mechanism is connected with the spindle which is sleeved with the spindle bearing, the shaft coupler and the loading system and provided with the strain sheet; the strain sheet is connected with the data collecting system; and the transducer is connected with the output end of the motor. In the invention, heavy load can be stably applied, and lubricant and storage oil can be conveniently added; three sets of transmission mechanisms are utilized to simulate the different movement form of bearings, and the speed regulating range of the system gets larger. The invention has characteristics of simple structure, accurate measurement, and the like and has great promotion significance.
Description
Technical field
Patent of the present invention relates to a kind of experiment test device, relates in particular to a kind of heavy-load sliding friction testing machine, belongs to experiment test device.
Background technology
When the performance of research bearing material, need to measure friction factor and two performance index of wear extent usually, therefore all need frictional testing machine.Existing general frictional testing machine has following deficiency: (1) mostly is vertical structure greatly, adopts vertically to load, and is inconvenient to add lubricant; (2) add big load instability,, generally be no more than 5kN so loaded load is little; (3) forms of motion is single, can only simulate a kind of forms of motion (continuous motion or swing etc.) friction-wear test, and friction factor, wear extent and magnitude of load, forms of motion, lubricating condition etc. all have relation, thereby existing general frictional testing machine can not fine simulation bearing working field working conditions, causes the error of measurement easily.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of heavy-load sliding friction testing machine is provided.
The technical scheme that patent of the present invention adopts is:
A kind of heavy-load sliding friction testing machine mainly is made up of kinematic train, loading system and data acquisition system (DAS).Wherein kinematic train is made up of motor, frequency converter, reductor, chain wheel driving mechanism, main shaft, main shaft bearing and shaft coupling; Loading system is made up of anchor clamps and pressing machine; Data acquisition system (DAS) is made up of data collecting card, computing machine, foil gauge and oil pressure sensor.The output shaft of motor via reducer is connected with chain wheel driving mechanism, chain wheel driving mechanism is connected with main shaft, is socketed with main shaft bearing, shaft coupling and loading system on the main shaft, and foil gauge is installed on the main shaft, foil gauge is connected with data acquisition system (DAS), and frequency converter is connected with the output terminal of motor.
Described chain wheel driving mechanism can replace with crank and rocker mechanism or V-type tape handler.
The present invention has three cover kinematic trains, the one, the transmission of V-type tape handler, by the high speed shaft of motor through reductor, the main shaft bearing that drives on the main shaft by the V-type band rotates continuously, and its range of speeds is 50r/min-1440r/min, the 2nd, the crank and rocker mechanism transmission, slowed down through reductor by motor, swing by the main shaft bearing that crank and rocker mechanism drives on the main shaft, the range of speeds of crank is 3r/min-40r/min, the pivot angle of rocking bar is 20 °, and the peak torque of main shaft bearing is 2500Nm; The 3rd, the sprocket wheel chain drive, slow down through reductor by motor, the main shaft bearing that drives on the main shaft by the sprocket chain bar rotates, the range of speeds of main shaft bearing is 3-40r/min, realizes rotating continuously, and the peak torque of main shaft bearing is 2500Nm, during testing machine work, have only a cover mechanism to work, all the other mechanisms pull down, and the computer control frequency converter carries out stepless speed regulation to motor.
When testing machine is worked, cover in the driven by motor frictional testing machine three cover mechanisms, main shaft bearing on the main shaft is rotated, main shaft rotates by the inner ring that shaft coupling drives the bearing test specimen, pressing machine adds on the outer ring that is pressed in the bearing test specimen by anchor clamps, produce the friction square, because total system is a balance, so the kinetic moment of main shaft bearing and test specimen bearing friction square equate.Be stained with foil gauge on the main shaft bearing, the distortion of main shaft bearing makes foil gauge produce friction square electric signal, oil pressure sensor measures oil pressure electric signal (changing into normal pressure), this two path signal is after the sampling of ISO-LDH data collecting card, maintenance, amplification and digital-to-analog conversion, carry out data processing by computing machine at last, and dynamically preserve data and show friction factor change curve and parameter in real time.
The computing method of the friction factor of gained of the present invention are: foil gauge is attached on the main shaft bearing of frictional testing machine, two foil gauges and main shaft bearing axis angle are 45 °, what link to each other with foil gauge is Wheatstone bridge, can adopt full-bridge method and half-bridge method, and the present invention adopts the half-bridge method.
The present invention adopts horizontally disposed, is convenient to stably apply big load, and maximum can be loaded into 2000kN, and pressing machine employing level loads, and adds when being convenient to test and storage lubricating oil.When low speed, there are chain wheel driving mechanism and crank and rocker mechanism can simulate continuous motion and swing for selecting for use, forms of motion is more various, and the V-shape belt transmission is arranged during high speed, and is whole easy to use, and the friction factor of measuring is consistent with Sweden SKF test result.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is foil gauge connecting circuit figure among the present invention;
Embodiment:
As shown in Figure 1, 2, a kind of heavy-load sliding friction testing machine mainly is made up of kinematic train, loading system and data acquisition system (DAS); Wherein kinematic train is made up of motor 11, frequency converter 12, reductor 13, chain wheel driving mechanism 14, main shaft 15, main shaft bearing 16 and shaft coupling 17; Loading system is made up of anchor clamps 22 and pressing machine 23; Data acquisition system (DAS) is made up of data collecting card 31, computing machine 32, foil gauge 33 and oil pressure sensor 34.
When testing machine is worked, motor 11 drives chain wheel driving mechanism 14 by the output shaft of reductor 13, making main shaft 15 drive main shaft bearing 16 rotates, thereby the inner ring that drives the bearing test specimen rotates, pressing machine 23 adds on the outer ring that is pressed in the bearing test specimen by anchor clamps 22, produce the friction square, because total system is a balance, so the kinetic moment of main shaft 15 and test specimen bearing friction square equate.Be stained with foil gauge 33 on the main shaft 15, the distortion of main shaft bearing 16 makes foil gauge 32 produce friction square electric signal, oil pressure sensor 34 measures oil pressure electric signal (changing into normal pressure), this two path signal is after 31 samplings of ISO-LDH data collecting card, maintenance, amplification and digital-to-analog conversion, carry out data processing by computing machine 32 at last, and dynamically preserve data and show friction factor change curve and parameter in real time.
Because foil gauge 33 is 45 ° with main shaft 15 axis angles, then three principle stress values are followed successively by:
σ
1＝τ
max；σ
2＝0；σ
3＝-τ
max；
Get by generalized Hooke's law: ε
1=(σ
1-λ σ
3)/E=(1+ λ) τ
Max/ E;
So: τ
Max=E ε
1/ (1+ λ)
Get by materialogy knowledge: τ
Max=M
n/ W
n
Above various in: M
n: the bearing moment of torsion; W
n: bearing Torsion Section modulus; λ: Poisson ratio;
E: elastic modulus; D: bearing friction testing machine output shaft diameter.
Therefore draw following formula:
M
n＝πd
3Eε
1/16(1+λ)；
Because it is due to the suffered friction force of oscillating bearing that bearing is turned round, so the relation of its friction force and moment of torsion is as follows:
F＝M
n/r＝Eπd
3ε
1/16r(1+λ)
R in the formula: the inner ring radius of test specimen bearing.
The current potential of the output terminal of Wheatstone bridge (data collecting card input end) is:
U＝U
0ΔR/2R＝K
1ε
1
K1 in the formula: the sensitivity coefficient of foil gauge;
Current potential after the data acquisition card signal amplifies is:
U
1＝K
2U＝K
1K
2ε
1；
K
2: the amplification coefficient of data collecting card;
Pass because of friction factor and friction force is again:
μ＝F/2N＝πd
3EU
1/32K
1K
2rN(1+λ)；
All the other constants are replaced with a COEFFICIENT K, then draw:
μ＝KU
1/N；k＝Eπd
3/32K
1K
2r(1+λ)；
In test according to the potential value U that records
1, just can calculate the friction factor of bearing.
The present invention can stablize and applies big load and can conveniently add lubricating oil and oil storage; Adopt three sets of transmission mechanism, can simulate the different forms of motion of bearing, also make the speed adjustable range of system become big, integral body has simple in structure, measures characteristics such as accurate, has great dissemination.
Claims (2)
1, a kind of heavy-load sliding friction testing machine mainly is made up of kinematic train, loading system and data acquisition system (DAS); It is characterized in that: described kinematic train is made up of motor, frequency converter, reductor, chain wheel driving mechanism, main shaft, main shaft bearing and shaft coupling; Loading system is made up of anchor clamps and pressing machine; Data acquisition system (DAS) is made up of data collecting card, computing machine, foil gauge and oil pressure sensor, the output shaft of motor via reducer is connected with chain wheel driving mechanism, chain wheel driving mechanism is connected with main shaft, be socketed with main shaft bearing, shaft coupling and loading system on the main shaft, and foil gauge is installed on the main shaft, foil gauge is connected with data acquisition system (DAS), and frequency converter is connected with the output terminal of motor, and chain wheel driving mechanism can replace with crank and rocker mechanism or V-type tape handler.
2, a kind of heavy-load sliding friction testing machine according to claim 1, it is characterized in that: foil gauge is attached on the main shaft bearing of frictional testing machine, two foil gauges and main shaft bearing axis angle are 45 °, and what link to each other with foil gauge is Wheatstone bridge, adopts the half-bridge method to calculate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910183208A CN101625305A (en) | 2009-07-29 | 2009-07-29 | Heavy-load sliding friction testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910183208A CN101625305A (en) | 2009-07-29 | 2009-07-29 | Heavy-load sliding friction testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101625305A true CN101625305A (en) | 2010-01-13 |
Family
ID=41521226
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910183208A Pending CN101625305A (en) | 2009-07-29 | 2009-07-29 | Heavy-load sliding friction testing machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825544A (en) * | 2010-05-06 | 2010-09-08 | 上海大学 | Single-drive double-axial rotating and swinging sphere-block abrasion tester |
| CN102109445A (en) * | 2010-12-09 | 2011-06-29 | 南京航空航天大学 | Multi-direction heavy load frictional wear test method |
| CN103335631A (en) * | 2013-07-02 | 2013-10-02 | 山东科技大学 | Online stratum movement monitoring device and method |
| CN103901184A (en) * | 2014-04-21 | 2014-07-02 | 北京雅士科莱恩石油化工有限公司 | Method for testing and evaluating antifriction abrasion resistance of lubricating oil by utilizing friction test machine |
| CN107505258A (en) * | 2017-04-25 | 2017-12-22 | 无锡职业技术学院 | A kind of big load Multifunctional friction testing machine |
| CN111929080A (en) * | 2015-09-14 | 2020-11-13 | 马可迅车轮美国有限责任公司 | Monitoring device |
| CN112254960A (en) * | 2020-12-02 | 2021-01-22 | 浙江神牛机械制造有限公司 | Tensile strength testing device for chain detection |
-
2009
- 2009-07-29 CN CN200910183208A patent/CN101625305A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825544B (en) * | 2010-05-06 | 2011-11-23 | 上海大学 | Single-drive double-axial rotating and swinging sphere-block abrasion tester |
| CN101825544A (en) * | 2010-05-06 | 2010-09-08 | 上海大学 | Single-drive double-axial rotating and swinging sphere-block abrasion tester |
| CN102109445A (en) * | 2010-12-09 | 2011-06-29 | 南京航空航天大学 | Multi-direction heavy load frictional wear test method |
| CN102109445B (en) * | 2010-12-09 | 2012-12-12 | 南京航空航天大学 | Multi-direction heavy load frictional wear test method |
| CN103335631B (en) * | 2013-07-02 | 2016-04-06 | 山东科技大学 | A kind of rock movement on-Line Monitor Device and monitoring method thereof |
| CN103335631A (en) * | 2013-07-02 | 2013-10-02 | 山东科技大学 | Online stratum movement monitoring device and method |
| CN105572033A (en) * | 2014-04-21 | 2016-05-11 | 北京雅士科莱恩石油化工有限公司 | Evaluation method of antifriction and anti-friction and anti-wear properties and friction tester |
| CN103901184B (en) * | 2014-04-21 | 2016-01-20 | 北京雅士科莱恩石油化工有限公司 | A kind of method utilizing frictional testing machine test evaluation lubricating oil anti-wear and wear-resistant performance |
| CN103901184A (en) * | 2014-04-21 | 2014-07-02 | 北京雅士科莱恩石油化工有限公司 | Method for testing and evaluating antifriction abrasion resistance of lubricating oil by utilizing friction test machine |
| CN105572033B (en) * | 2014-04-21 | 2018-01-23 | 北京雅士科莱恩石油化工有限公司 | The evaluation method and frictional testing machine of a kind of anti-wear and wear-resistant performance |
| CN111929080A (en) * | 2015-09-14 | 2020-11-13 | 马可迅车轮美国有限责任公司 | Monitoring device |
| US11280664B2 (en) | 2015-09-14 | 2022-03-22 | Maxion Wheels U.S.A. Llc | Vehicle wheel assembly having improved monitoring capabilities for various vehicle conditions and monitoring device for accomplishing such monitoring |
| US11662247B2 (en) | 2015-09-14 | 2023-05-30 | Maxion Wheels U.S.A. Llc | Vehicle wheel assembly having improved monitoring capabilities for various vehicle conditions and monitoring device for accomplishing such monitoring |
| CN107505258A (en) * | 2017-04-25 | 2017-12-22 | 无锡职业技术学院 | A kind of big load Multifunctional friction testing machine |
| CN112254960A (en) * | 2020-12-02 | 2021-01-22 | 浙江神牛机械制造有限公司 | Tensile strength testing device for chain detection |
| CN112254960B (en) * | 2020-12-02 | 2022-04-26 | 浙江神牛机械制造有限公司 | Tensile strength testing device for chain detection |
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Application publication date: 20100113 |