CN104122198B - A kind of friction lining-hoisting cable dynamic friction transmission test device and method - Google Patents
A kind of friction lining-hoisting cable dynamic friction transmission test device and method Download PDFInfo
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- CN104122198B CN104122198B CN201410271323.4A CN201410271323A CN104122198B CN 104122198 B CN104122198 B CN 104122198B CN 201410271323 A CN201410271323 A CN 201410271323A CN 104122198 B CN104122198 B CN 104122198B
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Abstract
The invention discloses a kind of friction lining-hoisting cable dynamic friction transmission test device and method, comprise pedestal, driving mechanism, slip gear, enclose cornerite adjusting mechanism, exciting agency, wire rope and status monitoring mechanism; Pedestal comprises column, lower support platform and upper support platform, driving mechanism comprises motor and torque sensor, slip gear comprises friction pulley and band-type brake device, enclose cornerite adjusting mechanism and comprise C support and regulating wheel, exciting agency comprises horizontal exciting agency and longitudinal exciting agency, and status monitoring mechanism comprises steel wire rope tension monitoring device, dynamic Contact monitoring device, wire rope vibration monitoring device, microslip monitoring device.The present invention can simulate the dynamic friction drive characteristic in friction hoisting system under hoisting cable Dynamic Coupling vibrational state between friction lining and hoisting cable, can be used for probing into the various changes in friction gearing process under transverse direction, extensional vibration and the two coupled vibrations effect.
Description
Technical field
The present invention relates to a kind of friction lining-hoisting cable dynamic friction transmission test device and method.
Background technology
Mine hoist equipment is the required transportation equipment in colliery, and being the large-scale key equipment promoting coal, spoil, personnel, various material and facility along pit shaft, is the hinge that mine down-hole production system is connected with ground surface plant.Along with pit mining moves towards the requirement of deep and the safe and efficient production of modernization large-scale mine, the application of multi-rope friction hoisting machine is maximized increasingly, and it is large with its load-carrying capacity, hoisting depth is large, safety coefficient is high, and consumed power is low, and machine dimensions is little, the remarkable advantages such as low cost, are increasingly used in the mine hoisting of deep-well and ultra-deep mine.Along with the increase of the pit mining degree of depth, in order to improve the conevying efficiency of deep-well and ultra-deep mine hoist, hoisting device is inevitable to large lifting load and the development of high pulling speed, this is also for the safety and reliability of large-scale friction winding equipment proposes requirements at the higher level, particularly the abseiling of vertical shaft friction winding machine or car accident of slipping, be the accident potential in vertical shaft friction winding machine.Once abseiling or the car that slips, its consequence is hardly imaginable, and the lighter causes container damage, and hoisting cable is impaired, and severe one elevator system is scrapped, and pit shaft facility damages even casualties.
Multirope friction winder utilizes the friction force between wire rope with friction lining to drive wire rope to rotate together with friction pulley, and realize the lifting of container and transfer motion; Friction lining and wire rope form antithesis friction pair, and the height of friction factor directly affects the properties of hoister therebetween, as load-carrying capacity, work efficiency and security etc.When friction drive hoist normally works, because liner and wire rope are all viscoelastic bodies, wire rope can only produce micro-elastic slip and namely wriggle on liner; When occurring to slide when between steel cable and liner, heat of friction will cause liner friction surface and internal temperature to raise, and make liner produce heat fading phenomenon, and the wearing and tearing of aggravation liner.Therefore, important impact is had during the friction factor between friction lining and wire rope, dynamic Contact and dynamically wriggling designs friction drive hoist with the dynamic viscoelastic friction mechanism of slip state and friction lining and heat fading mechanism.
In the lifting process of friction drive hoist, due to the acting in conjunction of variable hoisting cable overhang length and inertial load, hoisting cable upper carry acceleration, at the uniform velocity, in the lifting process of deceleration one-period, elevator system can be vibrated, wire rope also bears dynamic tension change, particularly in the acceleration promoted, decelerating phase, the dynamic tension vibration of wire rope is comparatively large, and vibration frequency increases along with the reduction of rope capacity.Hoisting cable is as a vibrating mass, transverse vibration, extensional vibration and the coupled vibrations of the two can be produced when hoister runs, likely to cause between wire rope with friction lining groove improper contacts in this vibration, the dynamic state such as slippage and disengaging, thus the friction driving power affected between friction lining and wire rope and occur skidding, cause the serious accident of friction drive hoist.Between friction lining and wire rope, the dynamic change of friction force also can aggravate the fluctuation of wire rope conversely simultaneously, thus causes whole elevator system to be in the not steady running status of one.Therefore, the influence research of dynamic vibration state to the friction gearing ability of hoister and friction traction stationarity of wire rope is most important.
So, a kind of friction lining-hoisting cable dynamic friction transmission test device and method are proposed, with probe into dynamic Contact under transverse direction, extensional vibration and the two coupled vibrations effect between hoisting cable and friction lining, dynamically wriggle and friction factor, friction pulley around enter to hold and lay out hold that the dynamic tension of wire rope develops, the STRESS VARIATION of friction lining near the dynamic viscoelastic friction mechanism of friction lining, friction lining and hoisting cable contact region.
Frictional experiment device between friction lining and wire rope comprises: the patent No. is 200510134988.1 high-speed tester for friction between disclosing a kind of liner and wire rope, planar process is used to be realized the stepless transformation of different relative slip velocity (0.5m/s to 6m/s) between wire rope from liner by control system, but, this testing machine can only unidirectionally at the uniform velocity slide, can not friction gearing behavioral study under analog vibration state; The patent No. is 200810032468 disclose a kind of elevator armored rope bending fatigue state experimental bench, the independent bending fatigue state of steel wire rope for elevator can be carried out, combine the observation experiment of bending fatigue state, oppositely combination bending fatigue state in the same way, and difference according to actual needs can change multiple canoe, cornerite and tension force, but the dynamic Contact can not analyzed between wire rope and friction lining and friction gearing behavior; The patent No. is 201110436607.0 sliding friction testing machines disclosing a kind of friction type winder liner, research can promote the comprehensive sliding friction behavior between steel wire and friction lining and receive the affecting laws of sliding speed and slip acceleration, and the influence research bending dynamic wriggling (small Local Sliding) and the slip state be wound on friction pulley between friction lining and hoisting cable can not be probed into; The patent No. is 201220707814.5 disclose a kind of friction type winder steel wire rope anti-skid device, liner is made to clamp hoisting cable by mobile Brake Block, the profile of tooth cross structure of liner can the outside deterioration of real-Time Compensation wire rope, hoisting cable is avoided to occur dangerous slip, the comprehensive sliding friction behavior between friction lining and wire rope only studied by this testing machine, also can not investigate the dynamic wriggling (small Local Sliding) between friction lining and hoisting cable and microslip behavior.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of friction lining-hoisting cable dynamic friction transmission test device and method, the dynamic friction drive characteristic under hoisting cable Dynamic Coupling vibrational state between friction lining and hoisting cable in friction hoisting system can be simulated, can be used for probing into transverse direction, dynamic Contact under extensional vibration and the two coupled vibrations effect in friction gearing process between hoisting cable and friction lining, dynamic wriggling and friction factor, friction pulley is around entering end and lay out to hold the dynamic tension of wire rope to develop, the dynamic viscoelastic friction mechanism of friction lining and heat fading mechanism, the STRESS VARIATION of friction lining near friction lining and hoisting cable contact region, with dynamic monitoring laterally, dynamic Contact under extensional vibration and the two coupled vibrations effect between hoisting cable and friction lining, dynamic wriggling and friction factor, friction pulley is around entering end and lay out to hold the dynamic tension of wire rope to develop, the dynamic viscoelastic friction mechanism of friction lining, the STRESS VARIATION of friction lining near friction lining and hoisting cable contact region.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of friction lining-hoisting cable dynamic friction transmission test device, comprises pedestal, driving mechanism, slip gear, encloses cornerite adjusting mechanism, exciting agency, wire rope and status monitoring mechanism;
Described pedestal comprises column, lower support platform and upper support platform, column is arranged symmetrically with, lower support plateau levels is fixed on column, on lower support platform, even stationary cloth is equipped with bearing pin, bearing pin is arranged with spring, lower support platform is provided with the pin-and-hole corresponding with bearing pin position, and lower support platform is set on bearing pin, by spring supporting; Between lower support platform and upper support platform, mounting spring is the elasticity factor in order to simulate actual friction hoisting system intermediate roll mounting base;
Described driving mechanism comprises motor and torque sensor, upper support platform is fixedly installed support of motor and A support, motor is arranged on support of motor, and torque sensor is arranged on A support, and the output shaft of motor connects A shaft coupling, torque sensor and B shaft coupling successively; The driving moment that described torque sensor exports for measuring motor;
Described slip gear comprises friction pulley and band-type brake device, upper support platform is fixedly installed B support, B support has been arranged symmetrically with bearing spider, in each bearing spider, all bearing is installed, the central shaft both sides of friction pulley are fixed with the inner ring of two bearings respectively, and the central shaft of friction pulley is connected with B shaft coupling, band-type brake device is fixedly mounted in support platform, and band-type brake device is used for holding friction pulley tightly; Have liner ring group in all side arrangement of friction pulley, in liner ring group week, the middle part of side is provided with arc groove, and liner ring group is spliced to friction lining end continuously by some, and often pair of relative split of friction lining forms a segmental arc of liner ring group;
The described cornerite adjusting mechanism that encloses comprises C support and regulating wheel, C support is fixed on lower support platform, and C support is provided with some gears, and regulating wheel is arranged on C support, be fixed on corresponding gear by latch mechanism by regulating wheel, regulating wheel and friction pulley are positioned on same perpendicular;
Described exciting agency comprises horizontal exciting agency and longitudinal exciting agency; Horizontal exciting agency comprises vibrator, and vibrator is fixedly mounted on below lower support platform, and the output shaft of vibrator is connected with pulley; Longitudinal exciting agency comprises heavy load block and underload block, and heavy load block and underload block are fixed with one group of orienting lug respectively, and orienting lug is provided with guide wheel, and column is installed with T-shaped guide rail, and guide wheel is arranged in T-shaped guide rail and forms guide wheel mechanism;
Described wire rope one end is connected with heavy load block by A spring connector, and the other end walks around arc groove, after regulating wheel turns to, connect underload block by B spring connector, the pulley on vibrator output shaft and wire rope fit tightly; Use A spring connector to be connected with B spring connector elasticity that heavy load block and underload block can increase connection, the gear of adjustment regulating wheel, the angle of contact namely between adjustable friction pulley and wire rope;
Described status monitoring mechanism comprises steel wire rope tension monitoring device, dynamic Contact monitoring device, wire rope vibration monitoring device, microslip monitoring device, and lower support platform is installed with D support, steel wire rope tension monitoring device comprises magnetic flux type tension pick-up, magnetic flux type tension pick-up is arranged on D support, just to wire rope, adopt electromagnetic non-contact Cleaning Principle, there is according to wire rope the feature of twisting stock ripple, utilize the signal intensity of electromagnetic sensor to calculate steel wire rope tension, dynamic Contact monitoring device comprises laser displacement sensor and foil gauge, laser displacement sensor is arranged on D support, just to the surface of top position wire rope, the binding face place of often pair of friction lining is provided with hole slot, foil gauge is arranged in hole slot, foil gauge output line is connected with wireless strain sensing device, wireless strain sensing device and the gusseted plate be fixed on friction pulley weld together, dynamic strain value is transferred to computing machine by wireless strain sensing device, laser displacement sensor and foil gauge are respectively used to the dynamic creep of dynamic monitoring friction lining and the contact stress between friction lining and wire rope, the dynamic radial stroke of wire rope can be obtained by indirect calculation, wire rope vibration monitoring device comprises the wireless three axis accelerometer be affixed on wire rope, for the horizontal and vertical vibration of measuring steel wire rope, microslip monitoring device comprises the high-speed camera instrument be fixed on D support, high-speed camera instrument just in the hole slot of friction lining, for monitoring the slip regime of friction lining and wire rope contact region in dynamic friction transmission process.
Preferably, described bearing pin is fixedly mounted on lower support platform by helicitic texture.
Preferably, the number of described bearing pin is four, arranges symmetrically.
Preferably, the surface of described guide wheel and T-shaped guide rail contact adopts elastomeric material, to increase contact resilient.
A kind of friction lining-hoisting cable dynamic friction transmission test method, comprises the steps:
(1) adjust regulating wheel position, obtain wire rope and enclose cornerite on friction pulley; Adjusting vibration exciter is to obtain horizontal exciting amplitude and the excited frequency of setting;
(2) first carry out control cincture kinetic friction wheel by frequency converter to motor to rotate, due to friction gearing effect wire rope heavy load block mentioned and leave ground; Then stop motor operation, check friction pulley by band-type brake device and prevent it from rotating; By the initial tension value of magnetic flux type tension pick-up record friction pulley and wire rope tangent place region wire rope; By the initial displacement value on laser displacement sensor monitoring wire rope top wire surface; To foil gauge energising, the record initial creep value of friction lining and the initial contact stress between friction lining and wire rope; By the local microslip initial value of high-speed camera instrument record friction lining and wire rope contact region;
(3) by frequency converter, motor is controlled, obtain the rope hoisting rate curve of setting; Stop the work of band-type brake device, open motor and vibrator; By the dynamic tension of friction pulley and wire rope tangent place region wire rope in magnetic flux type tension pick-up record friction winding process; By the change in displacement on laser displacement sensor monitoring wire rope top wire surface, in conjunction with the dynamic creep of overstrain sheet record friction lining and the change of the contact stress between friction lining and wire rope; By the local microslip amplitude of high-speed camera instrument record friction lining and wire rope contact region; By the horizontal and vertical vibration amplitude of wireless three axis accelerometer measuring steel wire rope; Measured the driving torque of friction pulley by torque sensor, indirectly obtain the friction force between friction lining and wire rope and friction factor;
(4) when the heavy load block promoted reaches desired location, close motor and vibrator, open band-type brake device, stop experiment.
By changing motor frequency and rotating speed, heavy load block and the quality of underload block, the excited frequency of vibrator and amplitude, the horizontal level of regulating wheel and the kind of friction lining, study different pulling speeies, mine hoist acceleration, lifting weight, horizontal exciting amplitude, the dynamic friction transmission behavior of wire rope under friction pulley encloses cornerite and gasket material condition between friction lining and wire rope; By stopping motor operation or vibrator work, (transverse direction or extensional vibration) dynamic friction transmission behavior between friction lining and wire rope under research single vibration form.
Beneficial effect: a kind of friction lining-hoisting cable dynamic friction transmission test device provided by the invention and method, the dynamic friction drive characteristic under hoisting cable Dynamic Coupling vibrational state between friction lining and hoisting cable in friction hoisting system can be simulated, can be used for probing into transverse direction, dynamic Contact under extensional vibration and the two coupled vibrations effect in friction gearing process between hoisting cable and friction lining, local microslip amplitude and friction factor, friction pulley is around entering end and lay out to hold the dynamic tension of wire rope to develop, the STRESS VARIATION of friction lining near friction lining and hoisting cable contact region, with dynamic monitoring laterally, dynamic characteristic of wriggling under extensional vibration and the two coupled vibrations effect between hoisting cable and friction lining and the dynamic viscoelastic friction mechanism of friction lining, this to quantitatively characterizing laterally, under coupled longitudinal vibration operating mode, the dynamic friction drive characteristic of wire rope-friction lining provides effective experimental facilities, it is easy and simple to handle, multiple functional, effective, has practicality widely in the art.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of structure of the present invention;
Fig. 2 is the left TV structure schematic diagram of structure of the present invention;
Fig. 3 (a) is for the A-A of friction lining position in Fig. 1 is to partial view;
Fig. 3 (b) is for the A-A of Fig. 1 high speed video camera position is to partial sectional view;
Wherein: 1, friction pulley; 2, band-type brake device; 3, regulating wheel; 4, C support; 5, underload block; 6, heavy load block; 7, vibrator; 8, wire rope; 9, magnetic flux type tension pick-up; 10, D support; 11, laser displacement sensor; 12, B shaft coupling; 13, torque sensor; 14, A shaft coupling; 15, motor; 16, A support; 17, support of motor; 18, bearing pin; 19, spring; 20, column; 21, T-shaped guide rail; 22, guide wheel; 23, wireless three axis accelerometer; 24, A spring connector; 25, lower support platform; 26, upper support platform; 27, B support; 28, bearing spider; 29, high-speed camera instrument; 30, foil gauge; 31, friction lining; 32, wireless strain sensing device; 33, gusseted plate.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, Figure 2, Fig. 3 (a) and Fig. 3 (b) and be depicted as a kind of friction lining-hoisting cable dynamic friction transmission test device, comprise pedestal, driving mechanism, slip gear, enclose cornerite adjusting mechanism, exciting agency, wire rope 8 and status monitoring mechanism, illustrated with regard to various piece below.
Described pedestal comprises column 20, lower support platform 25 and upper support platform 26, column 20 is arranged symmetrically with, lower support platform 25 is horizontally fixed on column 20, lower support platform 25 is equipped with four bearing pins 18 by the even stationary cloth of helicitic texture, bearing pin 18 is arranged with spring 19, lower support platform 26 is provided with the pin-and-hole corresponding with bearing pin 18 position, and lower support platform 26 is set on bearing pin 18, by spring 19 and supports; Between lower support platform 25 and upper support platform 26, mounting spring 19 is the elasticity factors in order to simulate actual friction hoisting system intermediate roll mounting base.
Described driving mechanism comprises motor 15 and torque sensor 13, upper support platform 26 is fixedly installed support of motor 17 and A support 16, motor 15 is arranged on support of motor 17, torque sensor 13 is arranged on A support 16, and the output shaft of motor 15 connects A shaft coupling 14, torque sensor 13 and B shaft coupling 12 successively; The driving moment that described torque sensor 13 exports for measuring motor 15.
Described slip gear comprises friction pulley 1 and band-type brake device 2, upper support platform 26 is fixedly installed B support 27, B support 27 has been arranged symmetrically with bearing spider 28, in each bearing spider 28, all bearing is installed, the central shaft both sides of friction pulley 1 are fixed with the inner ring of two bearings respectively, and the central shaft of friction pulley 1 is connected with B shaft coupling 12, band-type brake device 2 is fixedly mounted in support platform 26, and band-type brake device 2 is for holding friction pulley 1 tightly; Liner ring group is had in all side arrangement of friction pulley 1, in liner ring group week, the middle part of side is provided with arc groove, liner ring group is spliced to friction lining 31 end continuously by some, and often pair of relative split of friction lining 31 forms a segmental arc of liner ring group.
The described cornerite adjusting mechanism that encloses comprises C support 4 and regulating wheel 3, C support 4 is fixed on lower support platform 25, C support 4 is provided with some gears, regulating wheel 3 is arranged on C support 4, be fixed on corresponding gear by latch mechanism by regulating wheel 3, regulating wheel 3 and friction pulley 1 are positioned on same perpendicular.
Described exciting agency comprises horizontal exciting agency and longitudinal exciting agency; Horizontal exciting agency comprises vibrator 7, and vibrator 7 is fixedly mounted on below lower support platform 25, and the output shaft of vibrator 7 is connected with pulley; Longitudinal exciting agency comprises heavy load block 6 and underload block 5, heavy load block 6 and underload block 5 are fixed with one group of orienting lug respectively, orienting lug is provided with guide wheel 22, column 20 is installed with T-shaped guide rail 21, guide wheel 22 is arranged in T-shaped guide rail 21 and forms guide wheel mechanism, the surface that guide wheel 22 contacts with T-shaped guide rail 21 adopts elastomeric material, to increase contact resilient.
Described wire rope 8 one end is connected with heavy load block 6 by A spring connector 24, and the other end walks around arc groove, after regulating wheel 3 turns to, connect underload block 5 by B spring connector, the pulley on vibrator 7 output shaft and wire rope 8 fit tightly; Use A spring connector 24 to be connected with B spring connector elasticity that heavy load block 6 and underload block 5 can increase connection, the gear of adjustment regulating wheel 3, the angle of contact namely between adjustable friction pulley 1 and wire rope 8.
Described status monitoring mechanism comprises steel wire rope tension monitoring device, dynamic Contact monitoring device, wire rope vibration monitoring device, microslip monitoring device, and lower support platform 25 is installed with D support 10, steel wire rope tension monitoring device comprises magnetic flux type tension pick-up 9, magnetic flux type tension pick-up 9 is arranged on D support 10, just to wire rope 8, adopt electromagnetic non-contact Cleaning Principle, there is according to wire rope 8 feature of twisting stock ripple, utilize the signal intensity of electromagnetic sensor to calculate steel wire rope tension, dynamic Contact monitoring device comprises laser displacement sensor 11 and foil gauge 30, laser displacement sensor 11 is arranged on D support 10, just to the surface of top position wire rope 8, the binding face place of often pair of friction lining 31 is provided with hole slot, foil gauge 30 is arranged in hole slot, foil gauge 30 output line is connected with wireless strain sensing device 32, wireless strain sensing device 32 and the gusseted plate 33 be fixed on friction pulley 1 weld together, laser displacement sensor 11 and foil gauge 30 are respectively used to the dynamic creep of dynamic monitoring friction lining 30 and the contact stress between friction lining 31 and wire rope 8, the dynamic radial stroke of wire rope can be obtained by indirect calculation, wire rope vibration monitoring device comprises the wireless three axis accelerometer 23 be affixed on wire rope 8, for the horizontal and vertical vibration of measuring steel wire rope 8, microslip monitoring device comprises the high-speed camera instrument 25 be fixed on D support 10, in the hole slot of high-speed camera instrument 25 just to friction lining 31, for monitoring the slip regime of friction lining 31 and wire rope 8 contact region in dynamic friction transmission process.
A kind of friction lining-hoisting cable dynamic friction transmission test method, comprises the steps:
(1) adjust regulating wheel 3 position, obtain wire rope 8 and enclose cornerite on friction pulley 1; Adjusting vibration exciter 7 is to obtain horizontal exciting amplitude and the excited frequency of setting;
(2) first carry out control cincture kinetic friction wheel 1 by frequency converter to motor 15 to rotate, due to friction gearing effect wire rope 8 heavy load block 6 mentioned and leave ground; Then stop motor 15 to operate, check friction pulley 1 by band-type brake device 2 and prevent it from rotating; The initial tension value of friction pulley 1 and wire rope 8 tangent place region wire rope 8 is recorded by magnetic flux type tension pick-up 9; Monitored the initial displacement value on wire rope 8 top wire surface by laser displacement sensor 11, foil gauge 30 is energized, the record initial creep value of friction lining 31 and the initial contact stress between friction lining 31 and wire rope 8; The local microslip initial value of friction lining 31 and wire rope 8 contact region is recorded by high-speed camera instrument 29;
(3) by frequency converter, motor 15 is controlled, obtain the wire rope 8 pulling speed curve of setting; Stop band-type brake device 2 to work, open motor 15 and vibrator 7; The dynamic tension of friction pulley 1 and wire rope 8 tangent place region wire rope 8 in friction winding process is recorded by magnetic flux type tension pick-up 9; Monitored the change in displacement on wire rope 8 top wire surface by laser displacement sensor 11, laser displacement sensor 11 and foil gauge 30 record the dynamic creep of friction lining 31 and the contact stress between friction lining 31 and wire rope 8 changes; Record friction lining 31 by high-speed camera instrument 29 to change with the local microslip of wire rope 8 contact region; By the horizontal and vertical vibration amplitude of wireless three axis accelerometer 23 measuring steel wire rope 8; Measured the driving torque of friction pulley 1 by torque sensor 13, indirectly obtain the friction force between friction lining 31 and wire rope 8 and friction factor;
(4) when the heavy load block 6 promoted reaches desired location, close motor 15 and vibrator 7, open band-type brake device 2, stop experiment.
By changing motor 15 frequency and the quality of rotating speed, heavy load block 6 and underload block 5, the excited frequency of vibrator 7 and amplitude, the horizontal level of regulating wheel 3 and the kind of friction lining 31, study different pulling speeies, mine hoist acceleration, lifting weight, horizontal exciting amplitude, the dynamic friction transmission behavior of wire rope under friction pulley encloses cornerite and gasket material condition between friction lining 31 and wire rope 8; By stopping motor 15 to operate or vibrator 7 works, (transverse direction or extensional vibration) dynamic friction transmission behavior between friction lining 31 and wire rope 8 under research single vibration form.
The above is only the preferred embodiment of the present invention; be noted 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.
Claims (6)
1. friction lining-hoisting cable dynamic friction transmission test device, is characterized in that: comprise pedestal, driving mechanism, slip gear, enclose cornerite adjusting mechanism, exciting agency, wire rope (8) and status monitoring mechanism;
Described pedestal comprises column (20), lower support platform (25) and upper support platform (26), column (20) is arranged symmetrically with, lower support platform (25) is horizontally fixed on column (20), bearing pin (18) is equipped with in the upper even stationary cloth of lower support platform (25), bearing pin (18) is arranged with spring (19), upper support platform (26) is provided with the pin-and-hole corresponding with bearing pin (18) position, and upper support platform (26) is set on bearing pin (18), is supported by spring (19);
Described driving mechanism comprises motor (15) and torque sensor (13), upper support platform (26) is fixedly installed support of motor (17) and A support (16), motor (15) is arranged on support of motor (17), torque sensor (13) is arranged on A support (16), and the output shaft of motor (15) connects A shaft coupling (14), torque sensor (13) and B shaft coupling (12) successively; The driving moment that described torque sensor (13) exports for measuring motor (15);
Described slip gear comprises friction pulley (1) and band-type brake device (2), upper support platform (26) is fixedly installed B support (27), B support (27) has been arranged symmetrically with bearing spider (28), in each bearing spider (28), all bearing is installed, the central shaft both sides of friction pulley (1) are fixed with the inner ring of two bearings respectively, and the central shaft of friction pulley (1) is connected with B shaft coupling (12), band-type brake device (2) is fixedly mounted in support platform (26), band-type brake device (2) is for holding friction pulley (1) tightly, liner ring group is had in all side arrangement of friction pulley (1), in liner ring group week, the middle part of side is provided with arc groove, liner ring group is spliced to friction lining (31) end continuously by some, and often pair of relative split of friction lining (31) forms a segmental arc of liner ring group,
The described cornerite adjusting mechanism that encloses comprises C support (4) and regulating wheel (3), C support (4) is fixed on lower support platform (25), C support (4) is provided with some gears, regulating wheel (3) is arranged on C support (4), be fixed on corresponding gear by latch mechanism by regulating wheel (3), regulating wheel (3) and friction pulley (1) are positioned on same perpendicular;
Described exciting agency comprises horizontal exciting agency and longitudinal exciting agency; Horizontal exciting agency comprises vibrator (7), and vibrator (7) is fixedly mounted on lower support platform (25) below, and the output shaft of vibrator (7) is connected with pulley; Longitudinal exciting agency comprises heavy load block (6) and underload block (5), heavy load block (6) and underload block (5) are fixed with one group of orienting lug respectively, orienting lug is provided with guide wheel (22), column (20) is installed with T-shaped guide rail (21), and guide wheel (22) is arranged in T-shaped guide rail (21) and forms guide wheel mechanism;
Described wire rope (8) one end is connected with heavy load block (6) by A spring connector (24), the other end walks around arc groove, after regulating wheel (3) turns to, connect underload block (5) by B spring connector, the pulley on vibrator (7) output shaft and wire rope (8) fit tightly;
Described status monitoring mechanism comprises steel wire rope tension monitoring device, dynamic Contact monitoring device, wire rope vibration monitoring device, microslip monitoring device, and lower support platform (25) is installed with D support (10), steel wire rope tension monitoring device comprises magnetic flux type tension pick-up (9), and magnetic flux type tension pick-up (9) is arranged on D support (10), just to wire rope (8), dynamic Contact monitoring device comprises laser displacement sensor (11) and foil gauge (30), laser displacement sensor (11) is arranged on D support (10), just to the surface of top position wire rope (8), the binding face place of often pair of friction lining (31) is provided with hole slot, foil gauge (30) is arranged in hole slot, foil gauge (30) output line is connected with wireless strain sensing device (32), wireless strain sensing device (32) and the gusseted plate (33) be fixed on friction pulley (1) weld together, laser displacement sensor (11) and foil gauge (30) are respectively used to the dynamic creep of dynamic monitoring friction lining (31) and the contact stress between friction lining (31) and wire rope (8), wire rope vibration monitoring device comprises the wireless three axis accelerometer (23) be connected on wire rope (8), for the horizontal and vertical vibration of measuring steel wire rope (8), microslip monitoring device comprises the high-speed camera instrument (29) be fixed on D support (10), in the hole slot of high-speed camera instrument (29) just to friction lining (31), for monitoring the slip regime of friction lining (31) and wire rope (8) contact region in dynamic friction transmission process.
2. friction lining according to claim 1-hoisting cable dynamic friction transmission test device, is characterized in that: described bearing pin (18) is fixedly mounted on lower support platform (25) by helicitic texture.
3. friction lining according to claim 1-hoisting cable dynamic friction transmission test device, is characterized in that: the number of described bearing pin (18) is four, arranges symmetrically.
4. friction lining according to claim 1-hoisting cable dynamic friction transmission test device, is characterized in that: the surface that described guide wheel (22) contacts with T-shaped guide rail (21) adopts elastomeric material.
5. friction lining-hoisting cable dynamic friction transmission test method, is characterized in that: comprise the steps:
(1) adjust regulating wheel (3) position, obtain wire rope (8) and enclose cornerite on friction pulley (1); Adjusting vibration exciter (7) is to obtain horizontal exciting amplitude and the excited frequency of setting;
(2) first carry out control cincture kinetic friction wheel (1) by frequency converter to motor (15) to rotate, because heavy load block (6) is mentioned and leaves ground by friction gearing effect wire rope (8); Then stop motor (15) to operate, check friction pulley (1) by band-type brake device (2) and prevent it from rotating; By the initial tension value of magnetic flux type tension pick-up (9) record friction pulley (1) with wire rope (8) tangent place region wire rope (8); By the initial displacement value on laser displacement sensor (11) monitoring wire rope (8) top wire surface; To foil gauge (30) energising, the initial creep value of record friction lining (31) and the initial contact stress between friction lining (31) and wire rope (8); By the local microslip initial value of high-speed camera instrument (29) record friction lining (31) with wire rope (8) contact region;
(3) by frequency converter, motor (15) is controlled, obtain wire rope (8) the pulling speed curve of setting; Stop band-type brake device (2) work, open motor (15) and vibrator (7); By the dynamic tension of friction pulley (1) in magnetic flux type tension pick-up (9) record friction winding process with wire rope (8) tangent place region wire rope (8); By the change in displacement on laser displacement sensor (11) monitoring wire rope (8) top wire surface, change in conjunction with the dynamic creep of foil gauge (30) record friction lining (31) and the contact stress between friction lining (31) and wire rope (8); By the local microslip amplitude of high-speed camera instrument (29) record friction lining (31) with wire rope (8) contact region; By the horizontal and vertical vibration amplitude of wireless three axis accelerometer (23) measuring steel wire rope (8); Measured the driving torque of friction pulley (1) by torque sensor (13), indirectly obtain the friction force between friction lining (31) and wire rope (8) and friction factor;
(4) when the heavy load block (6) promoted reaches desired location, close motor (15) and vibrator (7), open band-type brake device (2), stop experiment.
6. friction lining according to claim 5-hoisting cable dynamic friction transmission test method, it is characterized in that: by changing motor (15) frequency and rotating speed, the quality of heavy load block (6) and underload block (5), the excited frequency of vibrator (7) and amplitude, the horizontal level of regulating wheel (3) and the kind of friction lining (31), study different pulling speeies, mine hoist acceleration, lifting weight, horizontal exciting amplitude, wire rope encloses the dynamic friction transmission behavior under cornerite and gasket material condition between friction lining (31) and wire rope (8) around friction pulley, by stopping motor (15) running or vibrator (7) work, the dynamic friction transmission behavior under research single vibration form between friction lining (31) and wire rope (8).
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