CN104020057A - Multifunctional rotation cutting coal rock testing device and method - Google Patents
Multifunctional rotation cutting coal rock testing device and method Download PDFInfo
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- CN104020057A CN104020057A CN201410262270.XA CN201410262270A CN104020057A CN 104020057 A CN104020057 A CN 104020057A CN 201410262270 A CN201410262270 A CN 201410262270A CN 104020057 A CN104020057 A CN 104020057A
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Abstract
The invention discloses a multifunctional rotation cutting coal rock testing device and method. The testing device comprises a fixed base platform, a translation system, a transmission system and a state monitoring system, wherein the fixed base platform comprises a base, a plate A welded on the base, and a plate B which is perpendicular to the base; the translation system comprises an axial translation system and a transverse translation system; the transmission system comprises a direct driving motor, a torque sensor, a rigid coupling, a transmission shaft, a barrel, a gear base and picks; the state monitoring system comprises a feeding amount measuring system, a force measuring system, a pick friction fatigue damage measuring system, a coal rock fall measuring system, a coal rock crack generation and expansion measuring system, a cutting area thermal field measuring system and a dust concentration monitoring system. By the testing device, the triaxial stress characteristics, the three-dimensional friction outline and the crack generation and expansion characteristics of the picks, the dynamic coal rock fall characteristics, the coal rock thermal field characteristics in a cutting area and the coal rock crack generation and expansion characteristics can be monitored in real time.
Description
Technical field
The present invention relates to a kind of Multifunctional rotary coal petrography cutting test unit and method, for studying three axle force-bearing situations, three-dimensional wear profile reconstruction, wear extent and the crack initiation and propagation characteristic of the single pick rotation coal petrography cutting process pick of simulation cutting machine tool, probe into pressure and torque characteristics, the dynamic Caving process of coal petrography and the temperature field evolution of crack initiation and propagation and coal petrography cut worn area of transmission shaft in monodentate rotation coal petrography cutting process.
Background technology
Coal is the leading energy of China, approximately 63% energy directly or secondary source in coal.Main Mechanical Crushing, i.e. pick (knife shape cutter teeth and the pick-shaped cutter) cut of adopting of coal in China exploitation; Pick is as the cutter of rock failure, and in cutting course, the pick being installed on cutting head bears higher compressive stress, shear stress and impact load, all can cause a large amount of cut tooth losing efficiencies every year, and then affects coal mining efficiency and cause tremendous economic loss.Thereby, the actual condition of simulation cut facility, by test method, to single pick, Failure Assessment and the analysis of coal petrography Cracking Mechanism in rotation coal petrography cutting process seems most important.For this reason, a kind of Multifunctional rotary coal petrography cutting test unit and method are provided, inquire into avalanche Cracking Mechanism and the thermal field characteristic of the failure mode of pick under different cut parameters and quantitative test, coal petrography, for designing novel cut facility group row mode, improve pick antiwear characteristic and serviceable life, raising cutting efficiency is significant.
For coal petrography cutting test method and device, have at present: the patent No. is that 201210421825.1 disclosed a kind of picks are to rock cutting mechanism test platform, can obtain clipping force under different pick installation parameters and kinematic parameter, can record cutting dust concentration, pick temperature field and cutting course video, yet can not carry out three-dimensional reconstruction and pick wearing and tearing quantitative test to the pick that weares and teares in cutting course, also can not probe into coal petrography crack initiation and expansion feature.The patent No. is 201310341432.4 to disclose a kind of coal petrography cutting test device and cut cutter test method, can study clipping force value under different cut parameters and change and tool wear evaluation; The patent No. is 201220584454.4 disclosed a kind of many picks parameter adjustable type rotation coal petrography cutting experimental provisions, can realize many pick rotation cuts under different cut parameters, obtains cutting resistance square and pick three-dimensional power in cutting course; Yet above-mentioned two apparatus functions are all more single, can not rotate the many reference amounts evolution in cutting course by comprehensive evaluation coal petrography, be unfavorable for obtaining cut facility group row's mode and the high efficiency cutting facility optimized and design; The patent No. is 201020578699.7 disclosed a kind of pick-shaped cutter test units, can realize the stressed and temperature test of pick when coal petrography cutting wall, and carry out wear evaluation, yet can not carry out in real time the wearing and tearing quantitative evaluation of pick in coal petrography cutting course and the test of coal petrography breakout characteristics, crack initiation and extended attribute.
Summary of the invention
The object of the invention is in order to overcome the deficiencies in the prior art, a kind of Multifunctional rotary coal petrography cutting test unit and method are provided, a kind of coal petrography monodentate multiple functional, simple to operate rotation cutting test device and method, can three axle mechanical characteristics of Real-Time Monitoring pick, the three-dimensional wear profile of pick and crack initiation and propagation characteristic, the dynamic breakout characteristics of coal petrography, cut district coal petrography thermal field characteristic, coal petrography crack initiation and propagation characteristic.
The technical solution used in the present invention is: a kind of Multifunctional rotary coal petrography cutting test unit, comprises fixedly base station, translation system, kinematic train, condition monitoring system;
Described fixedly base station comprises A pedestal, be welded on A on A pedestal dull and stereotyped, with the B flat board of the vertical placement of A pedestal;
Described translation system comprises axial translation system and transverse translation system; Described axial translation system comprises that symmetry is fixed on A line slideway on A flat board, is arranged on A line slideway and reciprocating mobile platform vertically; Described transverse translation system comprises that symmetry is fixed on B line slideway on B flat board, is arranged on B line slideway and reciprocating B pedestal; Described B pedestal is provided with A side plate, B side plate, C side plate and coal sample, and coal sample is fixed in B pedestal by screw and A side plate, B side plate and C side plate.
Described kinematic train comprises direct driving motor, torque sensor, positive coupling, transmission shaft, cylinder, toothholder and pick, described direct driving motor is fixed on A mobile platform, described torque sensor is arranged on the torque sensor bearing on A flat board, one end of torque sensor is connected with direct driving motor by key, the other end is connected with positive coupling by key, one end of described transmission shaft is connected with positive coupling, the other end is connected with cylinder by screw, cylinder is provided with sensor base, sensor base is provided with wireless triaxial force sensor, on wireless triaxial force sensor, be fixed with toothholder, in toothholder, by jump ring, be fixed with pick,
Described condition monitoring system comprises amount of feeding measuring system, force measuring system, pick fatigue under scrubbing damage measurement system, coal petrography avalanche measuring system, coal petrography crack initiation and expansion measuring system, cut district thermal field measuring system and dust concentration monitoring system;
Described amount of feeding measuring system comprises the A servo-cylinder that can axially adjust displacement and the B servo-cylinder of laterally adjusting displacement, A servo-cylinder is arranged on the dull and stereotyped one end of described A, B servo-cylinder is arranged on the dull and stereotyped one end of described B, and two servo-cylinders are all built-in with displacement transducer;
Described force measuring system comprises three-axis force measurement mechanism, device for pressure measurement and torque-measuring apparatus; Described three-axis force measurement mechanism comprises that wireless triaxial force sensor data are by being wirelessly transmitted to computing machine for measuring the wireless triaxial force sensor of monodentate rotation coal petrography cutting process pick force-bearing situation in three directions; Described device for pressure measurement comprises for measuring S type pressure transducer, support, bearing bracket stand and the bearing of the radial force that coal petrography monodentate rotation cutting course transmission shaft is subject to, described S type pressure transducer is evenly arranged in support surrounding, support is fixed on A mobile platform, S type pressure transducer inner side is connected with bearing bracket stand, in bearing bracket stand, by bearing pin, be fixed with bearing, the bearing that can rotate with described transmission shaft is four and is arranged symmetrically with, bearing outer ring is to pressing transmission shaft, bearing face with transmission shafts to vertical; Described torque-measuring apparatus comprises the moment of torsion torque sensor that pick is subject to when measuring coal petrography cutting;
Described pick fatigue under scrubbing damage measurement system comprises the horizontal industrial CT system that is placed on described A pedestal both sides, can carry out three-dimensional reconstruction to the pick that weares and teares after certain cut cycle, and then obtain wear profile and wear extent and the germinating of pick underbead crack and the spread scenarios of pick end;
Described coal petrography avalanche measuring system comprises A support, is fixed on the high-speed camera on A support;
Described coal petrography crack initiation comprises with expansion measuring system 5 calibrate AE sensors that are evenly arranged in upper end, coal sample side, between described calibrate AE sensor and coal sample interface, is provided with couplant;
Described cut district thermal field measuring system comprises B support, is fixed on the thermal imaging system on B support;
Described dust concentration monitoring system comprises the dust concentration tester being arranged on described mobile platform.
As preferably, the dimensional accuracy of described industrial CT system is 0.02mm, and spatial resolution is 5.0l p/mm.
As preferably, selected high-speed camera is that resolution is up to 1,600 ten thousand pixels, is up to the high-speed cameras of 200,000 frame/seconds while supporting the full width ultra-speed shooting of 4000 frame/seconds, little picture.
As preferably, described thermal imaging system is that the wide-angle lens of 52 ° * 38 ° is being placed the thermal imaging system that can monitor the change of temperature field in 1 square meter scope region when distance is 1.5 meters, and the heat sensitivity of thermal imaging system is 0.05 ℃.
As preferably, described dust concentration tester is that detection sensitivity is 0.01mg/m
3, and the dust concentration tester of kinetic measurement continuously.
Utilize above-mentioned test unit to carry out a test method for Multifunctional rotary coal petrography cutting, the method comprises the following steps:
A) pick is arranged in toothholder and with jump ring and is fixed, coal sample is placed in B pedestal, with the screw of B pedestal side, fix coal sample, by screw, A side plate, B side plate, C side plate be connected with B pedestal respectively simultaneously and fix coal sample;
B) start and regulate the position of high-speed camera and thermal imaging system, make pick and coal sample cut district in measurement range, start wireless triaxial force sensor, S type pressure transducer, torque sensor, calibrate AE sensor;
C) start direct driving motor, by kinematic train, pick is rotated with cylinder; By servo-hydraulic control B servo-cylinder piston rod, release, coal sample is moved to the feeding depth of setting;
D) by the piston rod of servo-hydraulic control A servo-cylinder, release, pick is with cylinder feed motion vertically, cut coal sample, complete after a cut stroke, the piston rod of controlling A servo-cylinder is contracted to initial position, control the piston rod of B servo-cylinder and release, be increased to next feeding depth, prepare next cut stroke;
E) repeating step c, d, every through i cut stroke, stop direct driving motor, the piston rod of controlling A servo-cylinder shrinks until pick arrives the position that industrial CT system can scan, by industrial CT system, scan pick after wearing and tearing is carried out to three-dimensional reconstruction, obtain the wear profile of pick and the crack initiation and propagation characteristic of wear extent and pick;
F) when cut number of times reaches setting value, stop high-speed camera, thermal imaging system, axial force sensor, S type pressure transducer, torque sensor, calibrate AE sensor, preserve related data and carry out aftertreatment, stop experiment.
Beneficial effect: the coal petrography monodentate rotation cut that can realize the different cut degree of depth by apparatus of the present invention is tested, and the parameter such as cutting resistance square, the pick in three directions stressed (normal pressure, clipping force and side force), transmission shaft force in radial, the pick wear profile based on CT three-dimensional reconstruction and the wear extent under different cut kinematic parameters and pick installation form and crack initiation and propagation characteristic, the dynamic avalanche situation of coal petrography, coal petrography crack initiation and propagation situation, cut district thermal field, cutting course dust concentration in can Real-Time Monitoring cutting course.The Monitoring Data that above-mentioned multiple dynamic monitoring function provides can provide effective foundation for further optimizing cut facility group row mode, raising pick wearing quality and serviceable life, raising cutting efficiency and research coal petrography cutting mechanism.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is structure partial schematic diagram of the present invention.
In figure: 1-high-speed camera, 2-A support, 3-A side plate, 4-B side plate, 5-B pedestal, 6-industrial CT system, 7-A pedestal, 8-A servo-cylinder, 9-direct driving motor, 10-torque sensor, 11-positive coupling, 12-bearing spider, 13-transmission shaft, 14-support, 15-calibrate AE sensor, 16-coal sample, 17-C side plate, 18-thermal imaging system, 19-B is dull and stereotyped, 20-B line slideway, 21-B servo-cylinder, 22-pick, 23-toothholder, 24-is wireless triaxial force sensor, 25-mobile platform, 26-A line slideway, 27-A is dull and stereotyped, 28-sensor base, 29-dust concentration tester, 30-cylinder, 31-bearing bracket stand, 32-bearing pin, 33-bearing, 34-S type pressure transducer.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figures 1 to 3, a kind of Multifunctional rotary coal petrography cutting test unit of the present invention, comprises fixedly base station, translation system, kinematic train, condition monitoring system:
Described fixedly base station comprises A pedestal 7, be welded on A flat board 27 on A pedestal, with the B flat board 19 of the vertical placement of A pedestal 7;
Described translation system comprises axial translation system and transverse translation system.Described axial translation system comprises that symmetry is fixed on A line slideway 26 on A flat board 27, is arranged on mobile platform 25 on A line slideway 26, is arranged on the A servo-cylinder 8 of dull and stereotyped 27 one end of A; Described mobile platform can to-and-fro movement vertically on A line slideway 26.Described transverse translation system comprises the B line slideway 20 and the B servo-cylinder 21 that are symmetricly set on B flat board 19, be arranged on B pedestal 5 on B line slideway 20, be arranged on A side plate 3, B side plate 4, C side plate 17 and coal sample 16 on B pedestal 5; Described B pedestal 5 can to-and-fro movement on B line slideway 20; Described coal sample 16 is fixed in B pedestal 5 by screw and A side plate 3, B side plate 4 and C side plate 17.
Described kinematic train comprises the direct driving motor 9 being fixed on A flat board 27, torque sensor 10 one end that are connected with direct driving motor 9, torque sensor 10 is arranged on the torque sensor bearing on mobile platform 25, the positive coupling 11 being connected with torque sensor 10 other ends, transmission shaft 13 one end that are connected with positive coupling 11, transmission shaft 13 is successively through bearing and device for pressure measurement in bearing spider 12, the cylinder 30 being connected by screw with transmission shaft 13 other ends, be arranged on the sensor base 28 on cylinder 30, be arranged on the wireless triaxial force sensor 24 in sensor base 28, be fixed on the toothholder 23 on wireless triaxial force sensor 24, by jump ring, be fixed on the pick 22 in toothholder 23, described direct driving motor 9 is connected with torque sensor 10 by key respectively with positive coupling 11,
Described condition monitoring system comprises amount of feeding measuring system, force measuring system, pick fatigue under scrubbing damage measurement system, coal petrography avalanche measuring system, coal petrography crack initiation and expansion measuring system, cut district thermal field measuring system, dust concentration monitoring system.
Described amount of feeding measuring system comprises that A servo-cylinder 8 and 21, two servo-cylinders of B servo-cylinder that can axially, laterally adjust displacement are all built-in with displacement transducer;
Described force measuring system comprises three-axis force measurement mechanism, device for pressure measurement and torque-measuring apparatus.Described three-axis force measurement mechanism comprises the wireless triaxial force sensor 24 being arranged in sensor base 28, for measuring the force-bearing situation of monodentate rotation coal petrography cutting process pick 22 in three directions, data wireless transfers to computing machine, and described wireless triaxial force sensor range is 0～20t; Described device for pressure measurement comprises the support 14 being fixed on mobile platform 25, the S type pressure transducer 34 that is evenly arranged in support 14 surroundings, the bearing bracket stand 31 being connected with S type pressure transducer 34 inner sides, by bearing pin 32, is fixed on the bearing 33 in bearing bracket stand 31, and selected S type pressure transducer 34 ranges are 0～20t; Described four bearing being arranged symmetrically with 33 outer rings, to pressing transmission shaft 13, can be rotated with transmission shaft 13, and bearing 33 end faces are axially vertical with transmission shaft 13, the radial force that this device for pressure measurement is subject to for measuring coal sample monodentate rotation cutting course transmission shaft; Described torque-measuring apparatus comprises torque sensor 10, the moment of torsion that pick 22 is subject to when measuring coal petrography cutting, and selected torque sensor 10 ranges are 0～2000Nm;
Described pick fatigue under scrubbing damage measurement system comprises the horizontal industrial CT system 6 that is placed on A pedestal 7 both sides, can by CT scan, (utilize ray from multiple directions transmission workpiece tomography, by detector, survey the ray information after being decayed by workpiece, by computing machine, the data that gather carried out to image reconstruction) pick 22 that weares and teares after certain cut cycle is carried out to three-dimensional reconstruction to obtain wear profile and wear extent and pick 22 underbead crack germinating and the spread scenarios of pick 22 ends; Selected industrial CT system 6 dimensional accuracies are 0.02mm, and spatial resolution is 5.0l p/mm.
Described coal petrography avalanche measuring system comprises A support 2, is fixed on the high-speed camera 1 on A support 2, and selected high-speed camera 1 resolution is up to 1,600 ten thousand pixels, supports the full width ultra-speed shooting of 4000 frame/seconds, is up to for 200,000 frame/seconds during little picture;
Described coal petrography crack initiation comprises with expansion measuring system 5 calibrate AE sensors 15 that are evenly arranged in coal sample 16 upper ends, side, between described calibrate AE sensor 15 and coal sample 16 interfaces, is provided with couplant;
Described cut district thermal field measuring system comprises B support 18, is fixed on the thermal imaging system 17 on B support 18, described thermal imaging system 17 uses the wide-angle lens of 52 ° * 38 ° placing the change of temperature field that can monitor 1 square meter scope region when distance is 1.5 meters, and the heat sensitivity of selected thermal imaging system 17 is 0.05 ℃;
Described dust concentration monitoring system comprises the dust concentration tester 29 being arranged on mobile platform 25, and selected dust concentration tester 29 detection sensitivities are 0.01mg/m
3, kinetic measurement continuously.
Utilize above-mentioned test unit to carry out a test method for Multifunctional rotary coal petrography cutting, the method comprises the following steps:
A) pick 22 is arranged in toothholder 23 and with jump ring and is fixed, coal sample 16 is placed in B pedestal 5, with the screw of B pedestal 5 sides, fix coal sample 16, by screw, A side plate 3, B side plate 4, C side plate 17 be connected with B pedestal 5 respectively simultaneously and fix coal sample 16;
B) start and regulate the position of high-speed camera 1 and thermal imaging system 17, make pick 22 and coal sample 16 cut districts in measurement range, start wireless triaxial force sensor 24, S type pressure transducer 34, torque sensor 10, calibrate AE sensor 15;
C) start direct driving motor 9, by kinematic train, pick 22 is rotated with cylinder 30; By servo-hydraulic control B servo-cylinder 21 piston rods, release, coal sample 16 is moved to the feeding depth of setting;
D) by the piston rod of servo-hydraulic control A servo-cylinder 8, release, pick 22 is with cylinder 30 feed motion vertically, cut coal sample 16, complete after a cut stroke, the piston rod of controlling A servo-cylinder 8 is contracted to initial position, control the piston rod of B servo-cylinder 21 and release, be increased to next feeding depth, prepare next cut stroke;
E) repeating step c, d, every through i cut stroke, stop direct driving motor 9, the piston rod of controlling A servo-cylinder 8 shrinks until pick 22 arrives the position that industrial CT system 6 can scan, by industrial CT system 6 scannings, pick after wearing and tearing 22 is carried out to three-dimensional reconstruction, obtain the wear profile of pick 22 and the crack initiation and propagation characteristic of wear extent and pick;
F) when cut number of times reaches setting value, stop high-speed camera 1, thermal imaging system 17, wireless triaxial force sensor 24, S type pressure transducer 34, torque sensor 10, calibrate AE sensor 15, preserve related data and carry out aftertreatment, stop experiment.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.In the present embodiment not clear and definite each ingredient all available prior art realized.
Claims (6)
1. a Multifunctional rotary coal petrography cutting test unit, is characterized in that: comprise fixedly base station, translation system, kinematic train, condition monitoring system;
Described fixedly base station comprises A pedestal, be welded on A on A pedestal dull and stereotyped, with the B flat board of the vertical placement of A pedestal;
Described translation system comprises axial translation system and transverse translation system; Described axial translation system comprises that symmetry is fixed on A line slideway on A flat board, is arranged on A line slideway and reciprocating mobile platform vertically; Described transverse translation system comprises that symmetry is fixed on B line slideway on B flat board, is arranged on B line slideway and reciprocating B pedestal; Described B pedestal is provided with A side plate, B side plate, C side plate and coal sample, and coal sample is fixed in B pedestal by screw and A side plate, B side plate and C side plate.
Described kinematic train comprises direct driving motor, torque sensor, positive coupling, transmission shaft, cylinder, toothholder and pick, described direct driving motor is fixed on A mobile platform, described torque sensor is arranged on the torque sensor bearing on A flat board, one end of torque sensor is connected with direct driving motor by key, the other end is connected with positive coupling by key, one end of described transmission shaft is connected with positive coupling, the other end is connected with cylinder by screw, cylinder is provided with sensor base, sensor base is provided with wireless triaxial force sensor, on wireless triaxial force sensor, be fixed with toothholder, in toothholder, by jump ring, be fixed with pick,
Described condition monitoring system comprises amount of feeding measuring system, force measuring system, pick fatigue under scrubbing damage measurement system, coal petrography avalanche measuring system, coal petrography crack initiation and expansion measuring system, cut district thermal field measuring system and dust concentration monitoring system;
Described amount of feeding measuring system comprises the A servo-cylinder that can axially adjust displacement and the B servo-cylinder of laterally adjusting displacement, A servo-cylinder is arranged on the dull and stereotyped one end of described A, B servo-cylinder is arranged on the dull and stereotyped one end of described B, and two servo-cylinders are all built-in with displacement transducer;
Described force measuring system comprises three-axis force measurement mechanism, device for pressure measurement and torque-measuring apparatus; Described three-axis force measurement mechanism comprises that wireless triaxial force sensor data are by being wirelessly transmitted to computing machine for measuring the wireless triaxial force sensor of monodentate rotation coal petrography cutting process pick force-bearing situation in three directions; Described device for pressure measurement comprises for measuring S type pressure transducer, support, bearing bracket stand and the bearing of the radial force that coal petrography monodentate rotation cutting course transmission shaft is subject to, described S type pressure transducer is evenly arranged in support surrounding, support is fixed on A mobile platform, S type pressure transducer inner side is connected with bearing bracket stand, in bearing bracket stand, by bearing pin, be fixed with bearing, the bearing that can rotate with described transmission shaft is four and is arranged symmetrically with, bearing outer ring is to pressing transmission shaft, bearing face with transmission shafts to vertical; Described torque-measuring apparatus comprises the moment of torsion that pick is subject to when measuring coal petrography cutting;
Described pick fatigue under scrubbing damage measurement system comprises the horizontal industrial CT system that is placed on described A pedestal both sides, can carry out three-dimensional reconstruction to the pick that weares and teares after certain cut cycle, and then obtain wear profile and wear extent and the germinating of pick underbead crack and the spread scenarios of pick end;
Described coal petrography avalanche measuring system comprises A support, is fixed on the high-speed camera on A support;
Described coal petrography crack initiation comprises with expansion measuring system 5 calibrate AE sensors that are evenly arranged in upper end, coal sample side, between described calibrate AE sensor and coal sample interface, is provided with couplant;
Described cut district thermal field measuring system comprises B support, is fixed on the thermal imaging system on B support;
Described dust concentration monitoring system comprises the dust concentration tester being arranged on described mobile platform.
2. a kind of Multifunctional rotary coal petrography cutting test unit according to claim 1, is characterized in that: the dimensional accuracy of described industrial CT system is 0.02mm, and spatial resolution is 5.0l p/mm.
3. a kind of Multifunctional rotary coal petrography cutting test unit according to claim 1, is characterized in that: selected high-speed camera is that resolution is up to 1,600 ten thousand pixels, is up to the high-speed cameras of 200,000 frame/seconds while supporting the full width ultra-speed shooting of 4000 frame/seconds, little picture.
4. a kind of Multifunctional rotary coal petrography cutting test unit according to claim 1, it is characterized in that: described thermal imaging system is that the wide-angle lens of 52 ° * 38 ° is being placed the thermal imaging system that can monitor the change of temperature field in 1 square meter scope region when distance is 1.5 meters, and the heat sensitivity of thermal imaging system is 0.05 ℃.
5. a kind of Multifunctional rotary coal petrography cutting test unit according to claim 1, is characterized in that: described dust concentration tester is that detection sensitivity is 0.01mg/m
3, and the dust concentration tester of kinetic measurement continuously.
6. utilize claim 1,2,3,4 or 5 test unit to carry out a test method for Multifunctional rotary coal petrography cutting, it is characterized in that: the method comprises the following steps:
A) pick is arranged in toothholder and with jump ring and is fixed, coal sample is placed in B pedestal, with the screw of B pedestal side, fix coal sample, by screw, A side plate, B side plate, C side plate be connected with B pedestal respectively simultaneously and fix coal sample;
B) start and regulate the position of high-speed camera and thermal imaging system, make pick and coal sample cut district in measurement range, start wireless triaxial force sensor, S type pressure transducer, torque sensor, calibrate AE sensor;
C) start direct driving motor, by kinematic train, pick is rotated with cylinder; By servo-hydraulic control B servo-cylinder piston rod, release, coal sample is moved to the feeding depth of setting;
D) by the piston rod of servo-hydraulic control A servo-cylinder, release, pick is with cylinder feed motion vertically, cut coal sample, complete after a cut stroke, the piston rod of controlling A servo-cylinder is contracted to initial position, control the piston rod of B servo-cylinder and release, be increased to next feeding depth, prepare next cut stroke;
E) repeating step c, d, every through i cut stroke, stop direct driving motor, the piston rod of controlling A servo-cylinder shrinks until pick arrives the position that industrial CT system can scan, by industrial CT system, scan pick after wearing and tearing is carried out to three-dimensional reconstruction, obtain the wear profile of pick and the crack initiation and propagation characteristic of wear extent and pick;
F) when cut number of times reaches setting value, stop high-speed camera, thermal imaging system, axial force sensor, S type pressure transducer, torque sensor, calibrate AE sensor, preserve related data and carry out aftertreatment, stop experiment.
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