CN104776948A - Drum torque detecting system - Google Patents
Drum torque detecting system Download PDFInfo
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- CN104776948A CN104776948A CN201510213443.3A CN201510213443A CN104776948A CN 104776948 A CN104776948 A CN 104776948A CN 201510213443 A CN201510213443 A CN 201510213443A CN 104776948 A CN104776948 A CN 104776948A
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Abstract
The invention provides a drum torque detecting system. The drum torque detecting system fundamentally solves the problems that the detection error of the mechanical property of an existing drum shearer is large, the number of detection parameters is small, and the detection result can not be applied to actual production. The drum torque detecting system comprises a cutting motor, a motor output shaft gear and a motor signal detecting device and is characterized by further comprising a driving wheel I, a driving wheel II, a driving wheel III, idler wheels I to III, a planet wheel, a drum gear, a drum and the like. The driving wheel I and the driving wheel II are sequentially meshed with the motor output shaft gear, the driving wheel III is arranged coaxially with the driving wheel II, the idler wheels I to III are sequentially meshed with the driving wheel III, the planet wheel is meshed with the idler wheel III, the drum gear is arranged coaxially with the planet wheel, and the drum is driven by the drum gear. A rotating shaft of the idler wheel III is a hinge pin sensor. A bearing is arranged outside the hinge pin sensor and limited in a cover plate. One end of the hinge pin sensor is limited to the cover plate through a hinge pin locating thread rod.
Description
Technical field
The present invention relates to coal mine machinery field, specifically a kind of cylinder moment of torsion detection system.
Background technology
For ensureing carrying out smoothly of cylinder coal mining activity, often need to carry out Real-Time Monitoring and record to the stressing conditions of each parts of coalcutter, and by being used to guide the manufacturing of coal mining machine after record interpretation of result, need, at the corresponding site of coalcutter, corresponding monitoring device is installed for this reason.Existing shearer parameters detection system is mainly used in the detection of cut tooth, cylinder, guide slip shoe, the level and smooth main portions such as boots, scraper conveyor.
The test of cylinder moment of torsion, existing torsion-testing method is mainly divided into contact and contactless two kinds.Contact torque sensor is adhering resistance strain sheets or install shaft coupling between measured axis, by the measure of the change moment of torsion of foil gauge resistance value on measured axis; Non-contact torque sensor one class utilizes moment of torsion and torsion angle relation to measure based on optical means, and a class utilizes twisting stress to produce magnetic effect based on magnetic theory to measure.The common ground of above torsion-testing sensor needs reequip power output shaft or install corresponding tool on axle.But combined harvester threshing cylinder is airtight device, and axle has sheller unit, above-mentioned sensor cannot be installed.
Coal mining machine roller mainly completes coal cutting and task of coalingging, and existing method by detecting the electrical quantity in motor operation course, thus determines the operation torque of cylinder.Because electrical quantity fluctuates little in coal mining process, cannot calculate with the electrical quantity of motor, the measuring result error therefore adopting the method to obtain is very big, cannot be used to guide actual production at all.The coal petrography of different hardness is often run in operation process, when running into the higher coal of hardness, rock, the moment of torsion of kinematic train can increase suddenly, as adjusted moment of torsion and rotating speed not in time, parts are very easily made to be damaged, seriously overload under avoiding machine driven system operating mode, often select the motor that safety coefficient (peak torque/nominal torque) is higher, certainly will manufacturing cost be improve.
Fully-mechanized mining working down-hole coal excavation operation process usually can relate to rib and be caving scope, coalcutter and rib impulsive force, the measurement of stress wave propagation scope and velocity of propagation, but because subsurface environment is complicated, not may in exploitation before in rib sensor installation, even if do not consider fund, construction safety, the problem of difficulty of construction, sensor is set up in original rib, original rib inner structure will certainly be affected, measurement result accurately cannot be obtained at all, for this reason, set up one and spatially meet 1:1 ratio with actual rib, physical function parameter is identical with actual coal petrography, the inner simulation rib by matrix arrangement many groups three-dimensional force transducer, and set up corresponding data acquisition, processing platform, to realize rib impulsive force, rib planted agent wave loops, rib planted agent velocity of wave propagation, rib planted agent wave traveling scope etc. detects, testing result can be coal winning technology parameter and determines to provide guidance with the formulation of associated safety control measures.
Summary of the invention
The object of this invention is to provide a kind of cylinder moment of torsion detection system, fundamentally solve the problem that cannot detect mechanics performance data under drum shearer operating mode, its have structure simple, easy to use, be easy to manipulation, the advantage such as Data Detection is directly perceived, testing result is reliable.
The object of the present invention is achieved like this: this cylinder moment of torsion detection system comprises cutting motor, motor output shaft gear, motor signal pick-up unit, and its technical essential is: the parts such as described cylinder moment of torsion detection system also comprises the driving wheel I that engages in turn with motor output shaft gear and driving wheel II, the driving wheel III that coaxially arranges with driving wheel II, the idle pulley I ~ III engaged in turn with driving wheel III, the planetary gear engaged with idle pulley III, the drum gear coaxially arranged with planetary gear, the cylinder that driven by drum gear; Wherein, the rotating shaft of idle pulley III is bearing pin sensor, and be provided with bearing outside bearing pin sensor, bearing is spacing in cover plate, and one end of bearing pin sensor is on the cover board spacing by bearing pin positioning screw.
Described simulation rib data acquisition platform comprise be positioned at simulation rib top pressing plate, for driving the hydraulic cylinder of pressing plate, be distributed in the three-dimensional internal stress sensor of simulation rib in matrix form, simulation rib is the coal petrography potpourri of building according to underground coal mine coal petrography hardness.
Test macro of the present invention by the interlock of coalcutter each several part sensing unit, the Measurement accuracy true mechanical characteristic data of each testing apparatus of outfit.This test macro not only can be used for the Real-Time Monitoring of coalcutter correlation parameter under operating mode, and coordinates the operating environment that simulation rib data acquisition platform can be complicated under aboveground simulation well.For manufacturer research and development shearer combine adopt in outfit process, provide send out data reference and a theoretical direction.
Accompanying drawing explanation
Fig. 1 is system architecture diagram of the present invention;
Fig. 2 is the surface structure schematic diagram of cylinder of the present invention;
Fig. 3 is the detonation configuration schematic diagram of cut assembly of the present invention;
Fig. 4 is the Principle of Signal Transmission schematic diagram of cutting head of the present invention;
Fig. 5 is the structural representation of cutting head part signal transmission circuit of the present invention;
Fig. 6 is the sectional structure schematic diagram of the flat slippery boots assembly of the present invention;
Fig. 7 is the main TV structure schematic diagram of the flat slippery boots assembly of the present invention;
Fig. 8 is the Impact direction schematic diagram of the level and smooth boots bearing pin of the present invention;
Fig. 9 is the main TV structure schematic diagram of the present invention's level and smooth boots bearing pin;
Figure 10 is the sectional structure schematic diagram of guide skid shoe component of the present invention;
Figure 11 is the main TV structure schematic diagram of guide skid shoe component of the present invention;
Figure 12 is the Impact direction schematic diagram of guide slip shoe bearing pin of the present invention;
Figure 13 is the main TV structure schematic diagram of guide slip shoe bearing pin of the present invention;
Figure 14 is fulcrum and the force position schematic diagram of guide slip shoe bearing pin X-direction timing signal of the present invention;
Force position schematic diagram when Figure 15 is guide slip shoe bearing pin of the present invention actual measurement;
Figure 16 is the structural representation of cut kinematic train of the present invention;
Figure 17 is the stressed exemplary plot of idler shaft sensor of the present invention;
Figure 18 is the sectional structure schematic diagram of scraper component of the present invention;
Figure 19 is the assembly structure schematic diagram that the present invention rocks vibration detection device;
Figure 20 is the sensor location position view in simulation rib;
Figure 21 is the main TV structure schematic diagram of simulation rib.
Description of reference numerals: 1 cylinder, 2 pick unit, 3 helical blades, 4 hard alloy heads, 5 snap rings, 6 tooth covers, 7 toothholders, 8 strain rosettes, 9 foil gauges, 10 metallic channels, 11 mounting blocks pin-and-holes, 12 fixed pins, 13 fixture block pin-and-holes, 14 wire guides, 15 fixture blocks, 16 mounting blocks, 17 transmitter modules, 18 receiver modules, 19 display screens, 20 power modules, 21A/D converter, 22 data-carrier stores, 23 supporting legs, 24 axle sleeves, 25 level and smooth boots bearing pins, 26 pressing plates, 27 level and smooth boots, 28 ring grooves, 29 foil gauge groups, 30 mount pads, 31 driven wheels, 32 bearings, 33 guide plates, 34 pin rows, 35 end plates, 36 dynamometry bolts, 37 guide slip shoe bearing pins, 38 foil gauge group I, 39 foil gauge group II, 40 foil gauge group III, 41 foil gauge group IV, 42 cutting motors, 43 motor output shaft gears, 44 driving wheel I, 45 driving wheel II, 46 driving wheel III, 47 idle pulley I, 48 idle pulley II, 49 idle pulley III, 50 drum gears, 51 planetary gears, 52 bearings, 53 bearing pin sensors, 54 idler shaft positioning screws, 55 cover plates, 56 bolts, 57 nuts, 58 chain annular grooves, 59 tension detecting apparatus, 60 scraper plates, 61 crossbeams, 62 rock vibration detection device, 63 detect baffle plate, 64 3-axis acceleration sensors, 65 charging holes, 66 data transmission mouths, 67 sealing-plugs, 68 dead slots, 69 acceleration acquisition modules, 70 three-dimensional internal stress sensors, 71 simulation ribs, 72 pressing plates, 73 hydraulic cylinders, 74 right pressing plates, 75 right hydraulic cylinders, 76 left pressing plates, 77 left hydraulic cylinders, 78 left bottom plates, 79 left slides, 80 left support plates, 81 right base plates, 82 right slides, 83 right support plates, 84 right sides are drawn and are moved oil cylinder, 85 upper backup pads, 86 Zolas move oil cylinder, 87 data processings and display unit.
Embodiment
Below in conjunction with Fig. 1 ~ 21, describe content of the present invention in detail by specific embodiment.This cylinder moment of torsion detection system comprise be connected with data collection station respectively coal mining machine data acquisition platform, simulate rib data acquisition platform, hydraulic support data acquisition platform, scraper conveyor data acquisition platform.
Wherein, coal mining machine data acquisition platform comprise cut tooth by force detection system, drum rotation speed detection system, coalcutter vibration detecting system, level and smooth boots by force detection system, guide slip shoe by force detection system, coalcutter position detecting system, coalcutter hydraulic pressure draw-bar by force detection system, cylinder moment of torsion detection system.
Simulation rib data acquisition platform comprises rib impulsive force detection system, rib planted agent wave loops detection system, rib planted agent velocity of wave propagation detection system, rib planted agent wave traveling range detection system.
Hydraulic support data acquisition platform comprises bearing pin/ear seat stress mornitoring system, displacement detection system, Hydraulic Support Posture monitoring system, hydraulic support position detecting system are tried to stop people from fighting each other in hydraulic support roof toad detection system, pushing and sliding.
Scraper conveyor data acquisition platform comprises chain and is subject to force detection system, scraper conveyor position detecting system by force detection system, flight chain speed detection system, scraper conveyor voltage/current/power detecting system, scraper conveyor vibration detecting system, the middle pan of scraper conveyor by force detection system, scraper conveyor dumbbell.
1) cut tooth is by force detection system
This system comprises the parts such as cut assembly, A/D converter, data-carrier store, transmitter module 17, receiver module 18, display screen 19.Wherein, cut assembly comprises screw drum 1 and is circumferentially fixed on the pick unit 2 on cylinder 1, pick unit comprises the parts such as hard alloy head 4, snap ring 5, tooth cover 6, toothholder 7, fixture block 14, and pick unit is fixed on the helical blade 3 of cylinder 1 by fixture block.Hard alloy head end inserts in toothholder, and fixing by the tooth cover of outside socket snap ring.Disc structure is provided with bottom toothholder, disk bottom car goes out the column structure that diameter is less than disk, the octagon rod structure in cylinder round section is connected in milling out in the middle part of column structure, column structure bottom outer wall is processed the metallic channel 10 be positioned on the center line of octagon post each side, in the same position of octagon post, foil gauge 9 and strain rosette 8 are installed in interval respectively.Fixture block 15 is the semi-closed structure with inner chamber (angle is not shown in figure), fixture block 15 processes the fixture block pin-and-hole 13 communicated with inner chamber for a pair and wire guide 14, mounting blocks 16 is processed bottom column structure, mounting blocks 16 is provided with a pair mounting blocks pin-and-hole 11 matched with fixture block pin-and-hole 13, mounting blocks 16 bottom toothholder inserts in fixture block 15 inner chamber, and spacing by fixed pin 15, the other end is spacing by fixture block bore seal by disc structure.Foil gauge 9 connects up downwards along metallic channel 10 with the wire of strain rosette 8, is drawn be connected with the A/D converter being positioned at cylinder after gathering by the wire guide 16 of fixture block 14.
The both positive and negative polarity of power module 20 is connected with the both positive and negative polarity of A/D converter 21, data-carrier store 22, transmitter module 17 respectively by wire, for A/D converter 21 power, data-carrier store 22 is powered, transmitter module is powered.The positive pole of power module 20 by wire and foil gauge 9 or strain rosette 8 (not shown, the same foil gauge of its annexation) positive pole be connected, the negative pole of foil gauge 23 or strain rosette is connected with the signal input part negative pole of A/D converter 21 by wire, the signal input part positive pole of A/D converter 21 is connected with the negative pole of power module 20, and this loop constitutes the analog acquisition loop that three axis force detects.The signal output part positive pole of A/D converter 21 is connected with the signal input part positive pole of data-carrier store 22 by wire, the signal output part negative pole of A/D converter 21 is connected with the signal input part negative pole of data-carrier store 22 by wire, the three axis force measured value real-time storage that this loop is obtained by A/D converter 21 is in data-carrier store 22, the signal output part positive pole of data-carrier store 22 is connected with the signal input part positive pole of transmitter module by wire, the signal output part negative pole of data-carrier store 22 is connected with the signal input part negative pole of transmitter module by wire, this loop by the three axis force measured value real-time Transmission in data-carrier store 22 to the signal receiving module being positioned at machine room, realize long-range reception data.
Because foil gauge and strain rosette are sealed in fixture block, without the need to worrying that severe work condition environment impacts measuring accuracy, improve measuring accuracy, preventing the damage of dynamometry original paper simultaneously, maintenance cost is dropped to minimum.The data processing of installing in cylinder and transmitter module are processed the information obtained.In order to the mechanical characteristic measuring pick that can be correct, the face of cylinder of toothholder connecting portion and leave gap with the fixture block of cylinder, does not contact with fixture block; The tail end of connecting portion is processed into square and coordinates with fixture block, and rear-end square column side is processed with through hole, can play connection function.The fixture block that this device is directly encapsulated in cylinder is inner, can prevent the destruction that down-hole rugged environment causes device.Without the need to changing the structure of pick cutting tip, without the need to changing the connected mode between pick and toothholder.Identical with the mounting means of common pick, also for improving the production efficiency of coalcutter and ensureing that the safety of coal mining activity provides sound assurance.
During work, cylinder is arranged on coalcutter with main axis along with digger, stressed generation strain during pick cutting coal petrography, pickholder column structure is driven to produce strain, the foil gauge and the strain rosette that are fixed on octagon column construction produce strain thereupon, foil gauge and the rear resistance of strain rosette distortion change, produce corresponding electric signal, analog quantity is converted to corresponding three axis force digital quantity through A/D converter and stores up in data-carrier store by signal, the information be stored in data-carrier store is sent to the receiver module in machine room by transmitter module, reflect on a display screen in real time after machine data process as calculated, the mechanical characteristic under pick actual condition can be measured when not changing pick actual operating conditions, and all can record or transfer back in real time on computing machine, accurately pick three received strength situation in coal petrography cutting process is measured in real time under coalcutter duty, measuring method is easy, reliable results, strong adaptability, the measurement mechanism applying this measuring method is installed easy to operate, real result is reliable, measurement cost is low.
2) level and smooth boots are by force detection system
This system comprises supporting leg 23, axle sleeve 24, level and smooth boots 27, pressing plate 26, full-bridge circuit, data processing conversion equipment, level and smooth boots 27 are hinged on supporting leg 23 by bearing pin 4, and by pressing plate 26 by spacing for level and smooth boots bearing pin 25, axle sleeve 24 is provided with between bearing pin and level and smooth boots, bearing pin 4 is tubular structure, bearing pin outer wall is provided with two ring grooves 28, each installation one foil gauge group 29 in groove, a part for foil gauge group is arranged on the horizontal direction in bearing pin cross section, an order part for foil gauge group is arranged on the vertical direction in bearing pin cross section, between supporting leg inwall and bearing pin outer wall, just coincide between level and smooth boots inwall and bearing pin outer wall, prevent level and smooth boots bearing pin 25 from moving in axis hole or rotating.Data processing conversion equipment comprises the PLC device and display screen of using data processing and conversion.
The method of testing of the level and smooth boots mechanical characteristic of this coalcutter comprises the following steps:
1) use full-bridge connected mode, when zero load, record the initial strain size of each foil gauge;
2) respectively to the Y-direction of the level and smooth boots of coalcutter and the fixed load of Z-direction applying 10000N, 20000N, 30000N, 40000N, and corresponding variate (namely actual strain value deducts initial strain value) is recorded
3) use mathematical analysis software to calculate the relational expression of loaded value and strain value, finally relational expression is input in PLC.
4) bearing pin demarcated is installed on level and smooth boots, under operating mode, foil gauge is through full-bridge circuit, strain size is transferred in PLC, level and smooth boots Y-direction and the stressed size of Z-direction is processed into through PLC Program, and show in real time on screen, Fy direction is Sy, Fz direction by force signal is Sz by force signal.
3) guide slip shoe is by force detection system
This system comprises mount pad 30, guide plate 33, driven wheel 31, the pin row engaged with driven wheel, mount pad 30 is hinged by guide slip shoe bearing pin 37 with guide plate 33, guide slip shoe bearing pin 37 is Pyatyi ladder tubular structure (diameter of axle smallest end is one-level), bearing pin by the first order and level V spacing on mount pad, by the second level and the fourth stage spacing on guide plate, driven wheel 31 is spacing on the third level by the bearing 32 at two ends, the junction of ladder tubular at different levels respectively correspondence is provided with and is positioned at bearing pin two ends foil gauge group I ~ IV 39 ~ 41, a part of foil gauge group I ~ IV is arranged on the horizontal direction in bearing pin cross section, an order part for foil gauge group is arranged on the vertical direction in bearing pin cross section, spacing in guide slip shoe bearing pin 37 have dynamometry bolt 36, dynamometry bolt 36 one end is threaded connection in guide slip shoe bearing pin 37, the other end is sealed by the end plate 35 be fixed on mount pad 30, between the inwall of guide slip shoe bearing pin 37 and the outer wall of dynamometry bolt 36, between mount pad inwall and guide plate outer wall, just coincide between guide plate inwall and driven wheel outer wall, prevent guide slip shoe bearing pin 37 from moving in the axis hole of mount pad 30 or rotating.During coal work, produce between the pin row 34 on guide slip shoe and scrapper conveyor and interact, at this moment the power suffered by each part on guide slip shoe all acts on dynamometry bearing pin, thus makes bearing pin produce distortion, causes each foil gauge and the distortion of dynamometry bolt while the distortion of dynamometry bearing pin.
The method of testing of this guide sliding shoe of coal-winning machine mechanical characteristic comprises the following steps:
1) demarcating the X-direction of dynamometry bearing pin: be fulcrum 1 in the middle part of one-level, is fulcrum 2 in the middle part of secondary, is fulcrum 3 in the middle part of level Four, is fulcrum 4 in the middle part of Pyatyi; F1 is relative with fulcrum 2 position, F2 and F3 is positioned at the two ends of the bearing pin third level, and F4 is relative with fulcrum 3 position.
A) fixed pivot 1, applies 0,10,20,30,40 ton forces respectively to F1, records the strain value T1 of foil gauge group 1 under corresponding different F1;
B) fixed pivot 2, applies 0,10,20,30,40 ton forces respectively to F2, records the strain value T2 of foil gauge group 2 under corresponding different F2;
C) fixed pivot 3, applies 0,10,20,30,40 ton forces respectively to F3, records the strain value T3 of foil gauge group 3 under corresponding different F3;
D) fixed pivot 4, applies 0,10,20,30,40 ton forces respectively to F4, records the strain value T4 of foil gauge group 4 under corresponding different F4;
E) then to the data analysis demarcated and matching, obtain each foil gauge group unit strain value and outside exert a force between relation: FC1=31.8016 × T1-0.0115; FC2=34.6444 × T2-0.5656; FC3=35.0556 × T3-0.4283; FC4=25.2937 × T4-0.1059.
2) the identical method of X-direction is adopted to demarcate the Y-direction of bearing pin: the strain value M1 ~ M4 recording foil gauge group 1 ~ 4 under different F1 ~ F4, obtains FM1=31.3193 × M1+0.0665; FM2=35.1973 × M2-0.6587; FM3=36.6102 × M3-0.4863; FM4=31.8852 × M4-0.0718.
3) interaction force between mount pad left plate and dynamometry bearing pin is RX1, RY1; Interaction force between mount pad right plate and dynamometry bearing pin is RX2, RY2; Interaction force on the left of guide plate and between dynamometry bearing pin is FX1, FY1; Interaction force on the left of driving wheel and between dynamometry bearing pin is FX2, FY2; Interaction force on the left of driving wheel and between dynamometry bearing pin is FX3, FY3; Interaction force on the right side of guide plate and between dynamometry bearing pin is FX4, FY4, then:
RX1＝[FC2×b+FC1×(a+b)]/b；RX2＝[FC3×d+FC4×(d+e)]/d；
RY1＝[FM2×b+FM1×(a+b)]/b；RY2＝[FM3×d+FM4×(d+e)]/d；
FX1＝FC1；FX2＝[RX1×(b+c)+FY4×(d+e)-FX1×(a+b+c)–RX2×d]/(b+c)；
FX3＝RX1+RX2-FX1-FX2-FX4；FX4＝FC4；
FY1＝FM1；FY2＝[RY1×(b+c)+FM4×(d+e)-FY1×(a+b+c)–RY2×d]/(b+c)；
FY3＝RY1+RY2-FY1-FY2-FY4；FY4＝FM4。
A, b, c, d, e in formula represent the distance between each power, as shown in figure 14.
In the guide slip shoe course of work, the axial force along dynamometry guide slip shoe bearing pin 37 can be measured by the dynamometry bolt be arranged in dynamometry guide slip shoe bearing pin 37.Accurate and effective can measure the mechanical characteristic of guide slip shoe in the coalcutter course of work, for the structure optimization of guide slip shoe provides foundation, to improving the reliability of coalcutter and serviceable life there is practical significance.
4) cylinder moment of torsion detection system
This system comprise cutting motor 42, motor output shaft gear 43, the driving wheel I 44 engaged in turn with motor output shaft gear 43 and driving wheel II 45, with driving wheel II 45 coaxial arrange driving wheel III 46, the idle pulley I ~ III 47 ~ 49 engaged in turn with driving wheel III 46, the planetary gear 51 engaged with idle pulley III 49, the part such as drum gear 50, the cylinder that by drum gear 50 driven that arrange coaxial with planetary gear 51.Wherein, the rotating shaft of idle pulley III 49 (adjacent with the planetary gear 51 of cylinder) is bearing pin sensor 53, be provided with bearing 52 outside bearing pin sensor 53, bearing 52 is spacing in cover plate 55, and one end of bearing pin sensor 53 is spacing on cover plate 55 by bearing pin positioning screw 54.
Bearing pin sensor is by shearing action, and analysis can obtain, (1) F
t=F
t1+ F
t2; (2) F
t=F
r1-F
r2; (3) F
t1=T/d.F
tfor circumference is made a concerted effort, F
rfor resultant radial force, F
t1and F
t2the force of periphery suffered by idle pulley III, F
r1and F
r2for idle pulley III force in radial, T is moment of torsion suffered by idle pulley III, and d is the diameter of idle pulley III.
By collecting the stress data F of both direction to bearing pin sensor
t(Y-direction), F
r(X-direction), wherein F
t1and F
t2the force of periphery, wherein F suffered by idle pulley III
t1for idle pulley II48 acts on to the power of idle pulley III 49, F
t2for planetary gear 51 retroaction is to the power of idle pulley III 49, F in coalcutter cutting course
t1and F
t2two power equal and opposite in direction directions are identical, obtain peripheral force F by formula (1)
t1=F
t2=F
t/ 2, obtain resultant radial force F by formula (2)
rbecause as Figure 17, F
r1to the right, F
r2left, F
r1and F
r2act on axle center, direction is contrary simultaneously, and equal and opposite in direction, i.e. F
r1=F
r2, so F
r=0, obtain actual torque T by formula (3), i.e. F
t1=2T/d, i.e. torque T=F
td/2.)
The bearing pin sensor of nearly cylinder side idle pulley III is close with idler shaft profile, and meets the mechanical requirements such as intensity.Bearing pin sensor has radial force measuring function, according to the measurement of bearing pin sensor to radial force, realizes the measurement of idle pulley moment of torsion in conjunction with idle pulley rotating speed, is being calculated the moment of torsion of cylinder by reduction gear ratio.Thus avoid classic method by detecting the error in fluctuation of motor current mensuration torque method; effectively eliminate the interference of extraneous factor; Output Transient Torque under Real-Time Monitoring cylinder operating mode and rotating speed; once there are moment of torsion generation abnormal conditions; just duty is adjusted rapidly; avoid damaging kinematic train, significant with protection main transmission for raising drum shearer operating reliability.
5) scraper conveyor vibration detecting system
This system comprises scraper plate 60, be fixed on detection baffle plate 63 bottom scraper plate, be fixed in scraper plate rock vibration detection device 62, the crossbeam 61 be fixed on by bolt 56 and nut 57 on scraper plate 60, some chain annular grooves 58 are provided with in scraper plate, be provided with tension detecting apparatus 59 (chain link with foil gauge) in chain annular groove, the bottom at scraper plate two ends is respectively equipped with groove.Rock that vibration detection device 62 comprises housing, the detection baffle plate 63 be fixed on housing, spacing in detection baffle plate have 3-axis acceleration sensor 64, spacing in housing have the acceleration acquisition module 69 be connected with 3-axis acceleration sensor 64 output terminal, detect baffle plate be provided with transmit mouth 66 with acceleration acquisition module 69 data, dead slot 68 that hole 65 of charging is corresponding, so that pick-up unit charging and data transmission are downloaded, dead slot 68 is provided with the hinged sealing-plug 67 with detecting on base plate.When in test process or when not using, clogged with sealing-plug 67, when data are transmitted by needs, sealing-plug 67 is opened, carry out data transmission.Be bolted and detect baffle plate 63 and will rock vibration detection device 62 and be fixed on the two ends of scraper plate 60 side.A data transmission mouth 66 is left in radio acceleration acquisition module 69 outside, when in test process or when not using, is clogged with water proof and dust proof plug 44, when needs transmission data, is opened by sealing-plug 67, carries out data transmission.What scraper plate 60, crossbeam 61 and chain link (tension detecting apparatus 59) adopted is all models is the scraper plate of SGW-250 type scraper conveyor, crossbeam and chain link.
The detection method that this scraper conveyor rocks vibration comprises the following steps:
A) charged for acceleration acquisition module 69 by charging hole 46, the data of wireless acquisition module optimum configurations are downloaded in acceleration acquisition module 69 by data transmission mouth 66.
B) when scraper conveyor runs, scraper chain produces and rocks vibration, and by radio acceleration acquisition module 69 for 3-axis acceleration sensor 64 provides power supply, 3-axis acceleration sensor 64 detects that scraper chain produces vibration acceleration signal;
C) acceleration signal detected regularly is transformed into electric signal output by 3-axis acceleration sensor 64;
D), after radio acceleration acquisition module 69 collects the signal that 3-axis acceleration sensor 64 sends, data are stored;
E) radio acceleration acquisition module 69 is by the mode of wireless transmission, sends data to radio network gateway, and is unified in acquisition terminal Received signal strength and other measured data together show on a display screen.
It is simple, safe and reliable and can realize real-time detection that this scrapes board test device structure, to monitor out the impact on scraper conveyor when scraper chain rocks vibration in time, 3-axis acceleration sensor and radio acceleration acquisition module are mainly used in that wire transmission signal distance is far disturbed seriously, connect up the experimental field dynamic strain measurement such as loaded down with trivial details, in experimentation, experimenter away from experimental field, can ensure that the highly effective and safe of experiment.
In real time, accurately detect scraper chain when underground scraper conveyor works and rock the change of vibration characteristics, and the data that On-board test obtains.
6) rib data acquisition platform is simulated
This analog platform comprises pressing plate 72, hydraulic cylinder 73, the three-dimensional internal stress sensor 70 of the distribution in matrix form, right pressing plate 74, right hydraulic cylinder 75, left pressing plate 76, left hydraulic cylinder 77, left bottom plate 78, left slide 79, left support plate 80, right base plate 81, right slide 82, right support plate 83, the right side draw move oil cylinder 84, upper backup pad 85, Zola move oil cylinder 86.Simulation rib 71 is the coal petrography potpourri of building according to underground coal mine coal petrography hardness, left bottom plate 78, right base plate 81 and upper backup pad 85 fix on the ground, right pressing plate 74 is pressed in the right side of rib 71 by right hydraulic cylinder 75, right hydraulic cylinder 75 is arranged on right support plate 83, right support plate 83 is arranged on right slide 82, the right side is drawn and is moved oil cylinder 84 and be connected between right support plate 83 and right base plate 74, for being slidably connected between right slide 82 and right base plate 74, left pressing plate 78 is pressed in the left side of rib 71 by left hydraulic cylinder 77, left hydraulic cylinder 77 is arranged on left support plate 80, left support plate 80 is arranged on left slide 79, Zola moves oil cylinder 86 and is connected between left support plate 80 and left bottom plate 78, for being slidably connected between left slide 79 and left bottom plate 78, the lower end connecting fluid cylinder pressure 73 of upper backup pad 85, the lower end of hydraulic cylinder 73 connects pressing plate 72, pressing plate 72 is pressed in the upper end of rib 71.Building the coal petrography potpourri adopted by exploiting lower not carrying out and sieving, obtaining simulation rib by successively building.Ground floor has been built, after placement a period of time, sensor is that matrix form is arranged on this layer of top by (ensureing that rib still has certain pliability), after thing to be mixed forms hard rib, carry out lower one deck and build, complete the preparation of whole rib by that analogy.Thus the on-site down-hole coal bed environment in simulation colliery, and then reduction error, hydraulic cylinder 73 acts on pressing plate 72, right hydraulic cylinder 75 acts on right pressing plate 74, left hydraulic cylinder 76 acts on left pressing plate 77 and can pressurize to simulation rib, in order to simulate the soil layer load above coal seam, three-dimensional internal stress sensor 70 is distributed in simulation rib 71 in matrix form, each three-dimensional internal stress sensor 70 all can detect three direction stressing conditions, and show in data processing and display unit 87, realize the detection of the simulation rib internal stress of mining in equipment coal mining process, after the step pitch circulation of coalcutter cut, left, the right side is drawn and is moved oil cylinder and to retract the displacement of a step pitch, rib both sides are got out of the way, enable coalcutter directly cut to the high order end of coal petrography and low order end.By changing pressure, flow set, namely low cost the different aboveground soil layer of simulation and down-hole coal bed environment can be repeated.
Experiment table can be set up the simulation rib model of different hardness, three-dimensional internal stress sensor can reflect coalcutter transmission situation to stress wave in the impact of rib and cutting course in the process of cut coal, main monitoring parameter, as spread scope, the stress velocity of wave propagation of stress wave, simulates the mechanical relationship between subsurface environment coalcutter and rib afterwards.For coal production producer is in coal mining process, provide data reference and theoretical direction, according to cutting head material and the coal winning technology parameter of data selection the best; carry out the protection work such as supporting in advance; for coal mining activity provides technical support, and then improve coal mining efficiency, reduce the maintenance cost of coalcutter.
Claims (2)
1. a cylinder moment of torsion detection system, comprise cutting motor, motor output shaft gear, motor signal pick-up unit, it is characterized in that: the parts such as described cylinder moment of torsion detection system also comprises the driving wheel I that engages in turn with motor output shaft gear and driving wheel II, the driving wheel III that coaxially arranges with driving wheel II, the idle pulley I ~ III engaged in turn with driving wheel III, the planetary gear engaged with idle pulley III, the drum gear coaxially arranged with planetary gear, the cylinder that driven by drum gear; Wherein, the rotating shaft of idle pulley III is bearing pin sensor, and be provided with bearing outside bearing pin sensor, bearing is spacing in cover plate, and one end of bearing pin sensor is on the cover board spacing by bearing pin positioning screw.
2. cylinder moment of torsion detection system according to claim 1, it is characterized in that: described simulation rib data acquisition platform comprise be positioned at simulation rib top pressing plate, for driving the hydraulic cylinder of pressing plate, be distributed in the three-dimensional internal stress sensor of simulation rib in matrix form, simulation rib is the coal petrography potpourri of building according to underground coal mine coal petrography hardness.
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