CN204703898U - Coal winning machine cutting bit mechanical characteristic Online Transaction Processing - Google Patents

Abstract

A kind of coal winning machine cutting bit mechanical characteristic Online Transaction Processing, fundamentally solve existing drum shearer mechanical characteristic metrical error large, detected parameters quantity is few, testing result cannot be applied to the problems such as actual production, it comprises cut assembly, A/D converter, data storage, transmitter module, receiver module, the parts such as display screen, its technical essential is: described cut assembly comprises helix drum and is circumferentially fixed on the pick unit on cylinder, pick unit comprises hard alloy head, snap ring, tooth cover, toothholder, the parts such as fixture block, pick unit is fixed on the helical blade of cylinder by fixture block, hard alloy head end inserts in toothholder, and overlaps fixing by outside socket snap ring and tooth.

Description

Coal winning machine cutting bit mechanical characteristic Online Transaction Processing

Technical field

The utility model relates to coal mine machinery field, specifically a kind of coal winning machine cutting bit mechanical characteristic Online Transaction Processing.

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 coal-winning machine, and by being used to guide the manufacturing of coal mining machine after record interpretation of result, need, at the corresponding site of coal-winning machine, 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, drag conveyor.

Coal winning machine cutting bit assembly is mined and one of consumable accessory in tunnelling machinery, is the main tool of coal breakage and broken coal.Pick is periodically subject to the impact of compressive stress, shearing stress and impact load when cutting coal petrography, normal generation pick fretting wear and broken teeth phenomenon, as improved the application life of pick, need carry out testing and analysis to the stressed of the pick course of work.Existing test platform is the simulation test on experimental bench, cannot obtain the actual loading data of pick under operating mode, therefore there is certain error, can not be directly used in the production technology instructing and improve pick.The application for a patent for invention being CN102941626A as application publication number discloses " a kind of pick is to rock cutting mechanism test platform ", it comprises pedestal, pedestal is arranged building stones moving guide rail and knife rest moving guide rail, building stones moving guide rail is arranged building stones mobile device, building stones mobile device comprises building stones platform, leading screw is driven to connect building stones platform drive motors by building stones platform outside building stones platform, building stones platform is arranged building stones clamping device, knife rest moving guide rail is arranged tool carrier moving device and pick driving mechanism.Although the field working conditions of this technical scheme approaching to reality to a certain extent, it still limits in laboratory environments, and is only the measurement for single cutterhead, and control accuracy still needs to improve, and data reliability still cannot meet actual needs.

Fully-mechanized mining working down-hole coal excavation operation process usually can relate to rib and be caving scope, coal-winning machine and rib impact force, the measurement of stress wave propagation scope and spread speed, 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 impact 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.

Utility model content

The purpose of this utility model is to provide a kind of coal winning machine cutting bit mechanical characteristic Online Transaction Processing, 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 purpose of this utility model is achieved in that this coal winning machine cutting bit mechanical characteristic Online Transaction Processing comprises the parts such as cut assembly, A/D converter, data storage, transmitter module, receiver module, display screen, its technical essential is: described cut assembly comprises helix drum and is circumferentially fixed on the pick unit on cylinder, pick unit comprises the parts such as hard alloy head, snap ring, tooth cover, toothholder, fixture block, and pick unit is fixed on the helical blade of cylinder by fixture block; Hard alloy head end inserts in toothholder, and overlaps fixing by outside socket snap ring and tooth; 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 circular cross-section is connected in milling out in the middle part of column structure, column structure bottom outer wall is processed the metallic channel be positioned on the center line of octagon post each side, in the same position of octagon post, foil gauge and strain rosette are installed in interval respectively; Fixture block is the semi-closed structure with inner chamber, fixture block processes the fixture block pin-and-hole communicated with inner chamber for a pair and wire guide, mounting blocks is processed bottom column structure, mounting blocks is provided with a pair mounting blocks pin-and-hole matched with fixture block pin-and-hole, mounting blocks bottom toothholder inserts in fixture block inner chamber, and spacing by steady pin, the other end is spacing by fixture block bore seal by disc structure; The wire of foil gauge and strain rosette connects up downwards along metallic channel, is drawn be connected with the A/D converter being positioned at cylinder after gathering by the wire guide of fixture block;

The both positive and negative polarity of power module is connected with the both positive and negative polarity of A/D converter, data storage, transmitter module respectively by wire, the positive pole of power module is connected by the positive pole of wire with foil gauge or strain rosette, the negative pole of foil gauge or strain rosette is connected with the signal input part negative pole of A/D converter by wire, and the signal input part positive pole of A/D converter is connected with the negative pole of power module; The signal output part positive pole of A/D converter is connected with the signal input part positive pole of data storage by wire, and the signal output part negative pole of A/D converter is connected with the signal input part negative pole of data storage by wire; The signal output part positive pole of data storage is connected with the signal input part positive pole of transmitter module by wire, and the signal output part negative pole of data storage is connected with the signal input part negative pole of transmitter module by wire.

Test macro of the present utility model by the interlock of coal-winning machine each several part sensing unit, the Measurement accuracy true mechanical characteristic data of each testing equipment of outfit.This test macro not only can be used for the Real-Time Monitoring of coal-winning machine relevant 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 flitting 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 utility model;

Fig. 2 is the surface structure schematic diagram of the utility model cylinder;

Fig. 3 is the detonation configuration schematic diagram of the utility model cut assembly;

Fig. 4 is the Principle of Signal Transmission schematic diagram of the utility model cutterhead;

Fig. 5 is the structural representation of the utility model cutterhead part signal transmission circuit;

Fig. 6 is the sectional structure schematic diagram of the flat slippery boots assembly of the utility model;

Fig. 7 is the main TV structure schematic diagram of the flat slippery boots assembly of the utility model;

Fig. 8 is the Impact direction schematic diagram of the level and smooth boots bearing pin of the utility model;

Fig. 9 is the main TV structure schematic diagram of the utility model level and smooth boots bearing pin;

Figure 10 is the sectional structure schematic diagram of the utility model guide skid shoe component;

Figure 11 is the main TV structure schematic diagram of the utility model guide skid shoe component;

Figure 12 is the Impact direction schematic diagram of the utility model guide slip shoe bearing pin;

Figure 13 is the main TV structure schematic diagram of the utility model guide slip shoe bearing pin;

Figure 14 is fulcrum and the force position schematic diagram of the utility model guide slip shoe bearing pin X-direction timing signal;

Force position schematic diagram when Figure 15 is the actual measurement of the utility model guide slip shoe bearing pin;

Figure 16 is the structural representation of the utility model cut transmission system;

Figure 17 is the stressed exemplary plot of the utility model idler shaft sensor;

Figure 18 is the sectional structure schematic diagram of the utility model scraper component;

Figure 19 is the assembly structure schematic diagram that the utility model 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 steady 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 storages, 23 supporting legs, 24 axle sleeves, 25 level and smooth boots bearing pins, 26 pressing plates, 27 level and smooth boots, 28 cannelures, 29 foil gauge groups, 30 mount pads, 31 driven wheels, 32 bearings, 33 guide strips, 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.

Detailed description of the invention

Below in conjunction with Fig. 1 ~ 21, describe content of the present utility model in detail by specific embodiment.This coal winning machine cutting bit mechanical characteristic Online Transaction Processing comprise be connected with data collection station respectively coal mining machine data acquisition platform, simulate rib data acquisition platform, hydraulic support data acquisition platform, drag conveyor data acquisition platform.

Wherein, coal mining machine data acquisition platform comprise cut tooth by force detection system, drum rotation speed detection system, coal-winning machine vibration detecting system, level and smooth boots by force detection system, guide slip shoe by force detection system, coal-winning machine position detecting system, coal-winning machine hydraulic pressure draw-bar by force detection system, cylinder moment of torsion detection system.

Simulation rib data acquisition platform comprises rib impact 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.

Drag conveyor data acquisition platform comprises chain and is subject to force detection system, drag conveyor position detecting system by force detection system, flight chain speed detection system, drag conveyor voltage/current/power detecting system, drag conveyor vibration detecting system, the middle pan of scraper conveyor by force detection system, drag conveyor dumbbell.

1) cut tooth is by force detection system

This system comprises the parts such as cut assembly, A/D converter, data storage, transmitter module 17, receiver module 18, display screen 19.Wherein, cut assembly comprises helix 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 overlaps fixing by outside socket snap ring and tooth.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 circular cross-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 steady 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 storage 22, transmitter module 17 respectively by wire, for A/D converter 21 power, data storage 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 storage 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 storage 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 storage 22, the signal output part positive pole of data storage 22 is connected with the signal input part positive pole of transmitter module by wire, the signal output part negative pole of data storage 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 storage 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 certainty of measurement, 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 coal-winning machine and ensureing that the safety of coal mining activity provides sound assurance.

During work, cylinder is arranged on coal-winning machine with main axis along with digger, stressed generation strain during pick cutting coal petrography, pick box 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 the corresponding signal of telecommunication, analog quantity is converted to corresponding three axis force digital quantity through A/D converter and stores up in data storage by signal, the information be stored in data storage 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 computer, accurately pick three received strength situation in coal petrography cutting process is measured in real time under coal-winning machine duty, measuring method is easy, reliable results, strong adaptability, the measurement mechanism fitting operation applying this measuring method is convenient, 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 cannelures 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, another part of 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 coal-winning machine 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 coal-winning machine 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 strip 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 strip 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 strip, 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, another part of 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 strip outer wall, just coincide between guide strip 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 support 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 support 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 support 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 support 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 strip 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 strip 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 coal-winning machine course of work, for the structure optimization of guide slip shoe provides foundation, to improving the reliability of coal-winning machine and application 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 reaction is to the power of idle pulley III 49, F in coal-winning machine 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 load, 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 speed reducing ratio.Thus avoid conventional 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 transmission system, significant with protection main transmission for raising drum shearer operating reliability.

5) drag 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, 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 checkout gear 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 drag conveyor, crossbeam and chain link.

The detection method that this drag 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 drag 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 signal of telecommunication 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 drag 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 mixture 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 mixture adopted by exploiting lower not carrying out and sieving, obtaining simulation rib by successively building.First 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 coal-winning machine 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 coal-winning machine 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.

Experimental bench can be set up the simulation rib model of different hardness, three-dimensional internal stress sensor can reflect coal-winning machine 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 coal-winning machine and rib afterwards.For coal production producer is in coal mining process, provide data reference and theoretical direction, according to cutterhead 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 coal-winning machine.

Claims (1)

1. a coal winning machine cutting bit mechanical characteristic Online Transaction Processing, comprise the parts such as cut assembly, A/D converter, data storage, transmitter module, receiver module, display screen, it is characterized in that: described cut assembly comprises helix drum and is circumferentially fixed on the pick unit on cylinder, pick unit comprises the parts such as hard alloy head, snap ring, tooth cover, toothholder, fixture block, and pick unit is fixed on the helical blade of cylinder by fixture block; Hard alloy head end inserts in toothholder, and overlaps fixing by outside socket snap ring and tooth; 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 circular cross-section is connected in milling out in the middle part of column structure, column structure bottom outer wall is processed the metallic channel be positioned on the center line of octagon post each side, in the same position of octagon post, foil gauge and strain rosette are installed in interval respectively; Fixture block is the semi-closed structure with inner chamber, fixture block processes the fixture block pin-and-hole communicated with inner chamber for a pair and wire guide, mounting blocks is processed bottom column structure, mounting blocks is provided with a pair mounting blocks pin-and-hole matched with fixture block pin-and-hole, mounting blocks bottom toothholder inserts in fixture block inner chamber, and spacing by steady pin, the other end is spacing by fixture block bore seal by disc structure; The wire of foil gauge and strain rosette connects up downwards along metallic channel, is drawn be connected with the A/D converter being positioned at cylinder after gathering by the wire guide of fixture block;

The both positive and negative polarity of power module is connected with the both positive and negative polarity of A/D converter, data storage, transmitter module respectively by wire, the positive pole of power module is connected by the positive pole of wire with foil gauge or strain rosette, the negative pole of foil gauge or strain rosette is connected with the signal input part negative pole of A/D converter by wire, and the signal input part positive pole of A/D converter is connected with the negative pole of power module; The signal output part positive pole of A/D converter is connected with the signal input part positive pole of data storage by wire, and the signal output part negative pole of A/D converter is connected with the signal input part negative pole of data storage by wire; The signal output part positive pole of data storage is connected with the signal input part positive pole of transmitter module by wire, and the signal output part negative pole of data storage is connected with the signal input part negative pole of transmitter module by wire.