CN114354482B - Device and method for monitoring damage of steel wire rope-wheel groove roller and sliding friction coupling - Google Patents
Device and method for monitoring damage of steel wire rope-wheel groove roller and sliding friction coupling Download PDFInfo
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- CN114354482B CN114354482B CN202111409779.9A CN202111409779A CN114354482B CN 114354482 B CN114354482 B CN 114354482B CN 202111409779 A CN202111409779 A CN 202111409779A CN 114354482 B CN114354482 B CN 114354482B
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Abstract
The invention discloses a device and a method for monitoring damage caused by coupling of a steel wire rope and a pulley groove roller and sliding friction. The steel wire rope is fixed on the tensioning mechanism and is in contact with the pulley groove, and the rope pulley realizes the simulation of the rolling and sliding friction behaviors of the steel wire rope and the pulley groove under the driving of the motor. Can adjust wire rope's corrosive environment at the friction in-process through control solution sprinkler, and then monitor its coupling damage. The invention can realize the friction and wear behavior simulation of the steel wire rope-wheel groove under the working conditions of different contact loads, tension forces, contact arc lengths, rotating speeds, reciprocating strokes, corrosion environments and the like, can master the change rule of the friction characteristics between the steel wire rope and the wheel groove by combining related sensors and a damage characteristic analysis method, and can disclose the wear-corrosion coupling damage mechanism and the cumulative evolution mechanism.
Description
Technical Field
The invention relates to a device and a method for monitoring friction and coupling damage of a steel wire rope-wheel groove roller and sliding friction, which are particularly suitable for monitoring the friction and coupling damage of the steel wire rope of a multilayer winding system such as mine hoisting and hoisting machinery, and can also be used for monitoring the friction and damage states of other steel wire rope guide wheels and the like.
Background
The steel wire rope is used as a key bearing and transmission part of a multilayer winding lifting system, is widely applied to the fields of cranes, winches, mine hoists, industrial hoists and the like, and the service state of the steel wire rope directly determines the reliability and personnel safety of system equipment. However, the steel wire rope is inevitably damaged by abrasion and corrosion under actual working conditions, and performance degradation and failure and rejection are caused. When the steel wire rope rounds the guide wheel or the transition pulley in the running process, the steel wire rope generates complex rolling and sliding friction behaviors between the wheel grooves. Under the action of heavy-load tension of the steel wire rope and system vibration, the surface abrasion and extrusion deformation damage of the steel wire rope are easily caused. In addition, the service environment of the steel wire rope is very severe, and the steel wire rope is influenced by natural environments such as insolation, rain, snow (acid rain/ice), wind and dust under different working conditions, and is also influenced by working conditions such as strong wind, water drenching, soluble salt, mineral dust, high temperature and humidity under the mine lifting working condition, so that the lubrication failure and the corrosion damage (stress corrosion and corrosion fatigue) of the steel wire rope are caused. And the abrasion and the corrosion damage of the steel wire rope occur at the same time, and the mutual influence aggravates the damage deterioration. In order to ensure the safe use of the steel wire rope, the fourth hundred and thirteen regulations of coal safety regulations (2016 edition) in China are as follows: the service life of the hoisting steel wire rope is not more than 2 years, and if the wire breakage, diameter reduction and corrosion degree of the steel wire rope do not exceed the regulation, the steel wire rope can be continuously used, but the service life of the steel wire rope cannot exceed 1 year. The main reasons for this are that people have not mastered the characteristic mechanism of abrasion and corrosion damage of the steel wire rope in the service process, and cannot accurately judge the service state of the steel wire rope. Therefore, the device and the method for monitoring the coupling damage of the steel wire rope, the sheave roller and the sliding friction are provided, the friction change and damage characteristic mechanism of the steel wire rope and the sheave under different working conditions is proved, and important basic data and technical support can be provided for the structural design and maintenance of the steel wire rope, the damage reduction and the service life extension of the steel wire rope.
At present, scholars at home and abroad research and develop various experimental devices about friction and wear of steel wire ropes. CN201610567586.9 discloses a friction corrosion fatigue damage monitoring device and method for an ultra-deep vertical shaft winding type hoisting steel wire rope, which can realize friction corrosion fatigue damage simulation and dynamic monitoring of adjacent winding layer steel wire ropes under different temperatures, corrosion solutions and tensile loads; CN201510102984.9 discloses a comprehensive friction detection device and method for a steel wire rope and a friction liner for a hoist, which can realize the simulation of three friction behaviors of cross-contact high-speed sliding friction, cross-contact creep friction wear and high-speed sliding friction between the steel wire rope and the friction liner; CN202011377483.9 discloses a vibration friction test device and method for a multilayer winding steel wire rope, which can simulate the friction and wear behavior among the steel wire ropes under the working condition of multilayer winding and lifting of a mine hoist.
However, the above patents do not consider the contact friction behavior between the steel rope and the sheave, and the complex damage and influence caused by the contact friction behavior are one of the important reasons for threatening the service safety and reliability of the steel rope. On the premise of not mastering the characteristic mechanism of the steel wire rope-wheel groove tribology, the problems of insecurity and uneconomic performance of the steel wire rope in the service process can not be solved.
According to the analysis, the friction characteristics and damage mechanisms of the multilayer winding steel wire ropes can be comprehensively mastered only by researching and developing the steel wire rope-wheel groove rolling and sliding friction coupling damage monitoring device and a matched monitoring and researching method thereof, and the safe and reliable operation of system equipment is guaranteed.
Disclosure of Invention
The invention aims to provide a device and a method for monitoring friction and wear coupling damage of a steel wire rope-wheel groove roller and a steel wire rope-wheel groove roller, which can realize friction and wear behavior simulation of the steel wire rope-wheel groove under working conditions of different contact loads, tension, contact arc length, rotating speed, reciprocating stroke, corrosion environment and the like, can master the change rule of the friction characteristic between the steel wire rope and the wheel groove by combining a related sensor and a damage characteristic analysis method, and can disclose the wear-corrosion coupling damage mechanism and the cumulative evolution mechanism.
In order to realize the purpose, the invention adopts the following technical scheme:
a device for monitoring damage of steel wire rope-wheel groove roller and sliding friction coupling comprises:
the device comprises a rope wheel bracket, a first belt bearing, a second belt bearing, a dynamic torque sensor, a wheel shaft, a wheel groove and a second belt bearing, wherein the rope wheel is arranged on the rope wheel bracket, the wheel shaft is arranged on the rope wheel, one end of the wheel shaft is arranged at one end of the rope wheel bracket through the first belt bearing, the other end of the wheel shaft is connected with a driving shaft of the variable frequency motor sequentially through the second belt bearing and the dynamic torque sensor, and the outer circumferential surface of the rope wheel is provided with the wheel groove;
the wire rope mounting bracket is equipped with wire rope on it to realize wire rope with the pulley groove realizes slip or roll and slide friction on the rope sheave, includes:
the upper supporting plate is horizontally arranged right above the rope wheel;
the L-shaped left connecting plate is connected to one end of the upper supporting plate and is positioned on one side of the upper sheave groove of the sheave;
the L-shaped right connecting plate is connected to the other end of the upper supporting plate and is positioned on the other side of the upper sheave groove of the sheave;
the L-shaped left connecting plate and the L-shaped right connecting plate are provided with connecting holes for connecting the end parts of the sliding steel wire ropes,
one end of the sliding steel wire rope is connected with the L-shaped left connecting plate, and the other end of the sliding steel wire rope is connected with the L-shaped right connecting plate;
after the sliding steel wire rope is placed in the wheel groove, the bottom of the L-shaped left connecting plate and the bottom of the L-shaped right connecting plate are arranged in a suspended mode;
any end of the sliding steel wire rope connected with the connecting plate is connected with a tension and pressure sensor used for detecting the tension applied to the sliding steel wire rope;
the transverse sliding rail is arranged on the upper supporting plate through a horizontal fixing frame, and a horizontal tensioning plate is connected to the transverse sliding rail through a translation sliding block;
one end of the rolling and sliding steel wire rope is connected with one end of the horizontal tensioning plate, and the other end of the rolling and sliding steel wire rope is connected with the other end of the horizontal tensioning plate in a tensioning mode;
any end of the rolling steel wire rope connected with the connecting plate is connected with a tension and pressure sensor used for detecting tension applied to the rolling steel wire rope;
the displacement sensor is used for detecting the horizontal displacement of the rolling and sliding steel wire rope;
the guide mechanism is fixedly connected with the steel wire rope mounting frame and is used for enabling the steel wire rope mounting frame to float up and down relative to the rope wheel;
and the solution spraying mechanism is used for spraying corrosive solution to the position of the rope wheel contact friction pair in the experimental process.
One end of the rolling and sliding steel wire rope is in threaded connection with one end of the horizontal tensioning plate through a bolt.
The guide mechanism comprises a vertical guide rail fixed on the rope pulley support and a sliding block matched with the vertical guide rail, and the sliding block is fixedly connected with the steel wire rope mounting frame through a floating support plate.
The solution spraying mechanism includes: the water pump is connected with one end of the hose, and the other end of the hose spans the upper supporting plate and then is connected with the container;
the upper supporting plate is provided with a window, a nozzle is arranged on the hose positioned at the window, and the nozzle is aligned with the contact area of the steel wire rope and the wheel groove.
The L-shaped left connecting plate and the L-shaped right connecting plate are provided with a plurality of connecting holes for connecting the ends of the sliding steel wire rope at different height positions so as to change the contact length of the sliding steel wire rope and the wheel groove.
And a fastening bolt is arranged between the sliding block and the vertical guide rail.
The invention further discloses a method for monitoring the sliding friction of the steel wire rope and the wheel groove, which is based on the device for monitoring the damage caused by the rolling and sliding friction coupling and comprises the following steps:
(a) Lifting the steel wire rope mounting rack to a certain height along the guide mechanism;
(b) Determining the contact arc length of the steel wire rope and the wheel groove, selecting a sliding steel wire rope with a corresponding length, cleaning oil stains on the surface of the sliding steel wire rope, fixing the left end of the sliding steel wire rope through a threaded hook and a corresponding threaded hole on an L-shaped left connecting plate, and connecting the right end of the sliding steel wire rope with a tension and pressure sensor and fixing the right end of the sliding steel wire rope at the corresponding threaded hole on an L-shaped right connecting plate; in addition, when the sliding wire rope is set in a horizontal position, the tension of the sliding wire rope is adjusted to a set value by the tension bolt;
(c) Under the action of gravity, the steel wire rope mounting frame descends along the guide mechanism until the sliding steel wire rope is in close contact with the wheel groove; the whole sliding steel wire rope can move up and down along the guide mechanism along with the steel wire rope mounting frame;
the contact load of the sliding steel wire rope and the pulley groove friction pair is determined by the self weight of the whole steel wire rope mounting frame, the contact load of the sliding steel wire rope and the tension of the sliding steel wire rope in a non-horizontal state are adjusted by increasing the counter weight, and the tension of the sliding steel wire rope is adjusted by the tension bolt when the sliding steel wire rope is in contact with the rope pulley in a horizontal state;
(e) Setting operation parameters of a variable frequency motor, turning on a motor switch, and driving a rope wheel to realize continuous rotation or positive and negative circulating rotation under certain parameters;
(f) Spraying a corrosive solution on a contact friction pair position of a rope wheel in an experimental process through a solution spraying mechanism, simulating a sliding friction behavior of a sliding steel wire rope and the rope wheel in a given corrosive solution environment, detecting a tension change signal and a torque signal of the sliding steel wire rope through a tension pressure sensor, a dynamic torque sensor, a data acquisition card and an upper computer, and calculating to obtain a sliding friction coefficient between the sliding steel wire rope and a wheel groove through an Euler formula;
(g) After the experiment is finished, the sliding steel wire rope is taken down, damage characteristic detection is carried out through SEM-EDS, a three-dimensional shape measuring instrument and an industrial CT tool, and the abrasion-corrosion coupling damage characteristic mechanism of the sliding steel wire rope can be analyzed and revealed.
The invention further discloses a rolling friction monitoring method of the steel wire rope-wheel groove, and the device for monitoring the rolling friction and the sliding friction coupling damage of the steel wire rope-wheel groove comprises the following steps:
(a) Connecting the rolling and sliding steel wire rope with a tension pressure sensor, fixing the rolling and sliding steel wire rope on a horizontal tensioning plate, and tensioning the rolling and sliding steel wire rope to a set value through a bolt; the contact load of the rolling steel wire rope and the pulley groove friction pair is determined by the integral dead weight of the steel wire rope mounting frame provided with the horizontal fixing frame, the transverse slide rail and the translation slide block, and the tension of the rolling steel wire rope is controlled by the adjusting bolt;
(b) Fixing the horizontal fixing frame on the upper supporting plate through bolts;
(c) Adjusting the direction of the hose, fixing the hose on the lower surface of the horizontal tensioning plate, and aligning the nozzle with the contact area of the rolling steel wire rope and the wheel groove;
(d) Setting parameters of a variable frequency motor, controlling the variable frequency motor to rotate in a forward and reverse circulation reciprocating manner, collecting measurement data of a displacement sensor (25), and analyzing a change rule of a rolling and sliding friction state of the variable frequency motor; the sliding displacement is measured by a displacement sensor arranged on a horizontal fixing frame, and the rolling contact state between a rolling steel wire rope and a wheel groove is monitored by comparing the rotating arc length of the wheel groove of the rope wheel and the horizontal displacement of the rolling steel wire rope;
(e) Spraying a corrosive solution on a contact friction pair position of a rope wheel in an experimental process through a solution spraying mechanism, simulating a rolling friction behavior of a rolling steel wire rope and the rope wheel in a given corrosive solution environment, detecting a tension change signal and a torque signal of the rolling steel wire rope through a tension pressure sensor, a dynamic torque sensor, a data acquisition card and an upper computer, and calculating to obtain a rolling friction coefficient between the rolling steel wire rope and a wheel groove through an Euler formula;
(f) After the experiment is finished, the rolling steel wire rope is taken down, damage characteristic detection is carried out through SEM-EDS, a three-dimensional shape measuring instrument and an industrial CT tool, and the abrasion-corrosion coupling damage characteristic mechanism of the rolling steel wire rope can be analyzed and revealed.
Has the advantages that:
compared with the prior art, the invention provides the device for monitoring the damage caused by the coupling of the steel wire rope, the wheel groove roller and the sliding friction, which has a flexible and simple structure. The design of a floating tensioning and loading mechanism can ensure that the contact load of the steel wire rope and the wheel groove is kept stable in the abrasion process; the multifunctional rope wheel has multiple functions, and two behavior simulations of sliding friction and rolling friction between the steel wire rope and the rope wheel can be realized through combined replacement of the two parts; the solution spraying system can realize the circular flow of corrosive media, can simulate the real corrosive environment of the steel wire rope aiming at different working conditions, and ensures the authenticity and the accuracy of an experimental result; the parameters are adjustable, experimental parameters such as the tension, contact load, contact arc length, sliding speed, reciprocating stroke, material type, corrosion environment, lubricating state and the like of the steel wire rope can be actively adjusted, and the influence rule of different working condition factors on the steel wire rope-wheel groove tribology characteristic parameters can be revealed; by combining different analysis means and detection methods, the coupling damage characteristics and the evolution mechanism of the steel wire rope in rolling and sliding friction states can be explored, and finally important data and technical support are provided for safe and efficient service of the steel wire rope.
Drawings
FIG. 1 is a schematic view of the overall structure of the device for monitoring damage caused by rolling and sliding friction coupling of a steel wire rope and a wheel groove;
FIG. 2 is a side view of the structure of the present invention;
FIG. 3 is a front view of the structure of the present invention;
FIG. 4 is a top view of the structure of the present invention;
FIG. 5 is a schematic structural view of a wire rope-sheave groove sliding frictional contact according to the present invention;
FIG. 6 is a schematic structural view of a wire rope-sheave roll-slip frictional contact according to the present invention;
FIG. 7 is a schematic view of a wire rope floatation mechanism according to the present invention;
FIG. 8 is a schematic view of the frame of the present invention;
in the figure: 1-1, a vertical first guide rail bracket; 1-2, a vertical second guide rail bracket; 1-3, a vertical third guide rail bracket; 1-4, a vertical fourth guide rail bracket; 2-1, a first vertical guide rail; 2-2, a second vertical guide rail; 2-3, a third vertical guide rail; 2-4, a fourth vertical guide rail; 3-1, a first upper slide block; 3-2, a second upper slide block; 3-3, a third upper slide block; 3-4, a fourth upper slide block; 4. an upper support plate; 5-1, an L-shaped left connecting plate; 5-2, an L-shaped right connecting plate; 6-1, a first seated bearing; 6-2, a second seated bearing; 7-1, a first lower slider; 7-2, a second lower sliding block; 7-3, a third lower sliding block; 7-4, a fourth lower sliding block; 8-1, a first lower floating support plate; 8-2, a second lower floating support plate; 9. a sheave bracket; 10. a sheave; 11. sliding the wire rope; 12. a hose; 13. a container; 14. a motor bracket; 15. a variable frequency motor; 16. a base plate; 17-1, a first coupling; 17-2, a second coupling; 18. a dynamic torque sensor; 19. a wheel axle; 20-1, a first upper floating support plate; 20-2, a second upper floating support plate; 21. a water pump; 22. a pull pressure sensor; 23. a nozzle; 24-1, a first translation slider; 24-1, a second translation slider; 25. a displacement sensor; 26. rolling and sliding the steel wire rope; 27. a horizontal tensioning plate; 28. a transverse guide rail; 29. a horizontal fixing frame; 30. and tensioning the bolt.
Detailed Description
The invention is further illustrated by the following examples.
As shown in fig. 1~4, the device for monitoring damage caused by coupling between a steel wire rope and a pulley groove roller and sliding friction comprises a driving device, a sliding friction mechanism, a rolling and sliding friction mechanism, a floating mechanism, a solution spraying device, a monitoring system, a frame and the like.
The device comprises a driving device, a floating mechanism, a rolling friction mechanism, a sliding friction mechanism, a solution spraying device, a tensioning device and a monitoring system, wherein the driving device and the floating mechanism are fixed on a rack, the rolling friction mechanism and the sliding friction mechanism are respectively connected with the floating mechanism, the upper end of the solution spraying device is connected with the tensioning device, the lower end of the solution spraying device is fixed through the rack, and the monitoring system carries out real-time dynamic monitoring on characteristic parameters of steel wire rope-wheel groove rolling and sliding friction through a sensor.
The driving device comprises a frequency conversion single machine 15 fixed on a motor bracket 14 through a bolt, a first coupler 17-1, a dynamic torque sensor 18, a second coupler 17-2, a wheel shaft 19, a first belt seat bearing 6-1 and a second belt seat bearing 6-2 which are fixed on a rope wheel bracket 9 through bolts, and a rope wheel 10 matched with the wheel shaft 19 through a key groove, wherein the first coupler 17-1, the dynamic torque sensor 18, the second coupler 17-2 and the wheel shaft 19 are sequentially connected; the brackets are all welded and fixed on the bottom plate 16.
The sliding friction mechanism comprises an upper supporting plate 4, an L-shaped left connecting plate 5-1 and a right connecting plate 5-2 which are connected with the upper supporting plate 4 through bolts, a sliding steel wire rope 11 with one end fixed with the L-shaped left connecting plate 5-1 and the other end connected with a pulling pressure sensor 22, a tensioning bolt 30 for horizontally tensioning the sliding steel wire rope 11, and the other end of the pulling pressure sensor 22-1 fixed with the L-shaped right connecting plate 5-2 through bolts.
The rolling friction mechanism comprises a horizontal fixing frame 29 connected with the upper supporting plate 4 through bolts, a transverse guide rail 28 arranged on the horizontal fixing frame 29, a first translation sliding block 24-1 and a second translation sliding block 24-2 for fixing the horizontal tensioning frame 27, a pulling pressure sensor 22 and a rolling sliding steel wire rope 26 which are fixed on the horizontal tensioning frame 27, and a displacement sensor 25, one end of which is fixed on the left side of the horizontal fixing frame 29, and the other end of which is connected with the horizontal tensioning frame.
The floating mechanism comprises 4 vertically fixed guide rails 2, 4 upper sliding blocks and 4 lower sliding blocks which are matched with the guide rails 2, a first upper floating support plate 20-1 which is fixed with the first upper sliding block 3-1 and the second upper sliding block 3-2 through bolts, a second upper floating support plate 20-2 which is connected with the third upper sliding block 3-3 and the fourth upper sliding block 3-4, a first lower floating support plate 8-1 which is connected with the first lower sliding block 7-1 and the third lower sliding block 7-3, and a second lower floating support plate 8-2 which is connected with the second lower sliding block 7-2 and the fourth lower sliding block 7-4.
The solution spraying device comprises a hose 12 supported by an upper support plate 4 and a connecting plate, a water pump 21 and a container 13 which are fixed on a bottom plate 16 and connected with two ends of the hose 12, and a nozzle 23 arranged in the middle of the upper hose 12.
The frame comprises 4 guide rail brackets for fixing the guide rail 2, a rope wheel bracket 9, a motor bracket 14 and a bottom plate 16.
As shown in fig. 3 and 4, the upper end of the upper support plate 4 is provided with a square hole, which is convenient for monitoring the motion state of the contact area and spraying different corrosive solutions; the L-shaped left connecting plate 5-1 and the L-shaped right connecting plate 5-2 are connected with the upper supporting plate 4 into a whole, and are connected with 2 upper floating supporting plates and two lower floating supporting plates to limit the movement in the vertical direction; meanwhile, a plurality of threaded holes are formed in different positions of the axis of the L-shaped left connecting plate 5-1 and the L-shaped right connecting plate 5-2, and the sliding steel wire rope 11 can be fixedly connected at different positions.
As shown in fig. 5, the right end of the sliding steel wire rope 11 is connected with the L-shaped right connecting plate 5-2 through a tension and pressure sensor 22, the left end of the sliding steel wire rope is fixed on a threaded hole of the L-shaped left connecting plate 5-1, and the whole sliding steel wire rope moves up and down along with the upper supporting plate 4 and the connecting plate in the direction of the vertical guide rail;
as shown in fig. 6, the rolling wire rope 26 is connected to the tension and pressure sensor 22, and is tightened on the horizontal tightening plate 27 by a bolt, and the horizontal tightening plate 27 is connected to the second translation slider 4 and the transverse guide 28, so that the rolling wire rope 26 can move freely in the horizontal direction in a tightened state.
The rope pulley 10 is axially provided with a circular arc-shaped wheel groove which is fixed on the wheel shaft 19 and can only realize continuous unidirectional rotation and reciprocating circular rotation under the drive of the variable frequency motor 15, and the top end of the wheel groove of the rope pulley 10 is respectively contacted and matched with the sliding steel wire rope 11 and the rolling steel wire rope 26 to form a friction pair.
The contact load of the sliding steel wire rope 11 and the pulley groove friction pair is determined by the self weight of the whole sliding friction mechanism through the floating mechanism, the contact load and the tension of the sliding steel wire rope 11 in a non-horizontal state can be adjusted by adding the balancing weight, and the tension of the sliding steel wire rope is adjusted through the tension bolt when the sliding steel wire rope is in contact with the pulley 10 in a horizontal state; the contact load of the rolling steel wire rope 26 and the wheel groove friction pair is determined by the integral self weight of the rolling friction mechanism, and the tension of the rolling steel wire rope 26 is controlled by the adjusting bolt.
The roll-sliding steel wire rope 26 performs reciprocating sliding in the horizontal direction in the reciprocating rotation process of the rope pulley 10, the sliding displacement is measured by the displacement sensor 25 arranged on the horizontal fixing frame 29, and the roll-sliding contact state between the roll-sliding steel wire rope 26 and the wheel groove is monitored by comparing the rotation arc length of the wheel groove of the rope pulley 10 with the horizontal displacement of the roll-sliding steel wire rope 26.
As shown in fig. 7 and 8, 4 guide rail brackets 1 of the floating mechanism are fixed on a bottom plate 16 of the frame, and an upper slider and an upper floating support plate 20 are connected to form a front upper support mechanism and a rear upper support mechanism and are connected with the upper end of a sliding friction mechanism; the lower slide block and the lower floating support plate 8 are fixed to form a left lower support mechanism and a right lower support mechanism which are connected with the bottoms of the sliding friction mechanisms through bolts; and the contact load of the friction pair is kept stable in the friction process of the rope pulley 10 and the steel wire rope.
As shown in fig. 3, the solution spraying mechanism forms a circulating system through a water pump 21, a hose 12 and a container 12, an upper end nozzle 23 is aligned with a rope-wheel contact friction pair position, solution spraying is performed in the experiment process, the simulation of a steel wire rope-wheel groove corrosion friction environment is realized, and the type of the nozzle 23 can be changed at will to realize spraying of different solution flows.
The invention relates to a sliding friction monitoring method of a steel wire rope-wheel groove roller and sliding friction coupling damage monitoring device, which comprises the following steps:
a, lifting an upper supporting plate 4 to a certain height, screwing an upper sliding block to fix the upper supporting plate, installing a left connecting plate and a right connecting plate, adjusting the height of a lower sliding block 7, and connecting and fixing the connecting plates and a lower floating supporting plate;
b, determining the contact arc length of the steel wire rope and the wheel groove, selecting a sliding steel wire rope 11 with a corresponding length, cleaning oil stains on the surface of the sliding steel wire rope, fixing the left end of the sliding steel wire rope 11 through a threaded hook and a corresponding threaded hole in an L-shaped left connecting plate 5-1, connecting the right end of the sliding steel wire rope with a tension pressure sensor, and fixing the sliding steel wire rope at the corresponding threaded hole in a right connecting plate; further, when the slide wire rope 11 is set in the horizontal position, it is necessary to adjust the tension of the slide wire rope 11 to a set value by the tension bolt 30;
and c, releasing the limiting bolts of the upper sliding block and the lower sliding block, so that the sliding friction mechanism descends under the action of gravity until the sliding steel wire rope 11 is in close contact with the pulley groove.
d, pouring the prepared corrosive solution into the container 13, and turning on a switch of a water pump 21 to enable the solution to circularly flow in the hose;
e, setting the operating parameters of the variable frequency motor 15, turning on a motor switch, and driving the rope pulley 9 to realize continuous rotation or positive and negative circulation rotation under certain parameters;
f, opening a nozzle 23, simulating the sliding friction behavior of the sliding steel wire rope 11 and the rope wheel 9 in a given solution corrosion environment, detecting a tension change signal and a torque signal of the steel wire rope through a tension pressure sensor 22, a dynamic torque sensor 18, a data acquisition card and upper computer software, and calculating the sliding friction coefficient between the sliding steel wire rope 11 and a wheel groove through an Euler formula;
and g, after the experiment is finished, taking down the sliding steel wire rope 11, and carrying out damage characteristic detection through an SEM-EDS, a three-dimensional morphology measuring instrument and an industrial CT tool, so that the wear-corrosion coupling damage characteristic mechanism of the sliding steel wire rope 11 can be analyzed and revealed.
The invention relates to a rolling friction monitoring method of a steel wire rope-wheel groove rolling and sliding friction coupling damage monitoring device, which comprises the following steps:
(a) Connecting the rolling and sliding steel wire rope 26 with the tension pressure sensor 22, fixing the rolling and sliding steel wire rope on a horizontal tensioning plate, and tensioning the rolling and sliding steel wire rope to a set value through a bolt; the contact load of the rolling steel wire rope and the pulley groove friction pair is determined by the integral dead weight of the steel wire rope mounting frame provided with the horizontal fixing frame, the transverse slide rail and the translation slide block, and the tension of the rolling steel wire rope is controlled by the adjusting bolt;
(b) Fixing the horizontal fixing frame 29 on the upper supporting plate 4 through bolts;
(c) Adjusting the direction of the hose 12, fixing the hose on the lower surface of the horizontal tensioning plate 27, and aligning the nozzle 23 with the contact area of the rolling steel wire rope 26 and the wheel groove;
(d) Setting parameters of a variable frequency motor 15, controlling the positive and negative cycle reciprocating rotation of the variable frequency motor, collecting measurement data of a displacement sensor (25), and analyzing the change rule of the rolling friction state of the variable frequency motor; the sliding displacement is measured by a displacement sensor arranged on a horizontal fixing frame, and the rolling contact state between a rolling steel wire rope and a wheel groove is monitored by comparing the rotating arc length of the wheel groove of the rope wheel and the horizontal displacement of the rolling steel wire rope;
(e) Spraying a corrosion solution on a contact friction pair position of a rope wheel in an experimental process through a solution spraying mechanism, simulating a rolling friction behavior of the rolling steel wire rope 11 and the rope wheel 9 in a given corrosion solution environment, detecting a tension change signal and a torque signal of the rolling steel wire rope through a tension pressure sensor 22, a dynamic torque sensor 18, a data acquisition card and an upper computer, and calculating to obtain a rolling friction coefficient between the rolling steel wire rope 26 and a wheel groove through an Euler formula;
(f) After the experiment is finished, the rolling and sliding steel wire rope 26 is taken down, damage characteristic detection is carried out through SEM-EDS, a three-dimensional morphology measuring instrument and an industrial CT tool, and the abrasion-corrosion coupling damage characteristic mechanism of the rolling and sliding steel wire rope 26 can be analyzed and revealed.
It will be appreciated by persons skilled in the art that whilst the description has been made in terms of embodiments, it is not intended that each embodiment comprises a single embodiment, and that such descriptions are provided for clarity only, and that those skilled in the art will be able to combine the embodiments as a whole to form further embodiments as will be appreciated by those skilled in the art, and that all such modifications and variations are intended to fall within the scope of the appended claims.
Claims (7)
1. The utility model provides a wire rope-race rolls, sliding friction coupling damage monitoring devices which characterized in that includes:
the device comprises a rope wheel bracket, a first belt bearing, a second belt bearing, a dynamic torque sensor, a wheel shaft, a wheel groove and a second belt bearing, wherein the rope wheel is arranged on the rope wheel bracket, the wheel shaft is arranged on the rope wheel, one end of the wheel shaft is arranged at one end of the rope wheel bracket through the first belt bearing, the other end of the wheel shaft is connected with a driving shaft of the variable frequency motor sequentially through the second belt bearing and the dynamic torque sensor, and the outer circumferential surface of the rope wheel is provided with the wheel groove;
the wire rope mounting bracket is equipped with wire rope on it, in order to realize wire rope with the pulley groove realizes slip or roll smooth friction on the rope sheave, includes:
the upper supporting plate is horizontally arranged right above the rope wheel;
the L-shaped left connecting plate is connected to one end of the upper supporting plate and is positioned on one side of the upper sheave groove of the sheave;
the L-shaped right connecting plate is connected to the other end of the upper supporting plate and is positioned on the other side of the upper sheave groove of the sheave;
the L-shaped left connecting plate and the L-shaped right connecting plate are provided with connecting holes for connecting the end parts of the sliding steel wire ropes,
one end of the sliding steel wire rope is connected with the L-shaped left connecting plate, and the other end of the sliding steel wire rope is connected with the L-shaped right connecting plate;
after the sliding steel wire rope is placed in the wheel groove, the bottom of the L-shaped left connecting plate and the bottom of the L-shaped right connecting plate are arranged in a suspended mode;
any end of the sliding steel wire rope connected with the connecting plate is connected with a tension and pressure sensor used for detecting the tension applied to the sliding steel wire rope;
the transverse sliding rail is arranged on the upper supporting plate through a horizontal fixing frame, and a horizontal tensioning plate is connected to the transverse sliding rail through a translation sliding block;
one end of the rolling and sliding steel wire rope is connected with one end of the horizontal tensioning plate, and the other end of the rolling and sliding steel wire rope is connected with the other end of the horizontal tensioning plate in a tensioning mode;
any end of the rolling steel wire rope connected with the connecting plate is connected with a tension and pressure sensor used for detecting tension applied to the rolling steel wire rope;
the displacement sensor is used for detecting the horizontal displacement of the rolling and sliding steel wire rope;
the guide mechanism is fixedly connected with the steel wire rope mounting frame and is used for enabling the steel wire rope mounting frame to float up and down relative to the rope wheel;
the solution spraying mechanism is used for spraying corrosive solution to the position of the rope wheel contact friction pair in the experimental process;
the sliding friction mechanism comprises an upper supporting plate, an L-shaped left connecting plate and a right connecting plate which are connected with the upper supporting plate through bolts, a sliding steel wire rope with one end fixed with the L-shaped left connecting plate and the other end connected with a tension pressure sensor, a tension bolt for horizontally tensioning the sliding steel wire rope, and the other end of the tension pressure sensor fixed with the L-shaped right connecting plate through bolts;
the rolling friction mechanism comprises a horizontal fixing frame connected with the upper supporting plate through bolts, a transverse guide rail arranged on the horizontal fixing frame, a first translation sliding block and a second translation sliding block which are used for fixing the horizontal tensioning frame, a pulling pressure sensor and a rolling steel wire rope which are fixed on the horizontal tensioning frame, and a displacement sensor, one end of the displacement sensor is fixed on the left side of the horizontal fixing frame, and the other end of the displacement sensor is connected with the horizontal tensioning frame;
the floating mechanism comprises 4 vertically fixed guide rails, 4 upper sliding blocks and 4 lower sliding blocks which are matched with the guide rails, a first upper floating support plate which is fixed with the first upper sliding block and the second upper sliding block through bolts, a second upper floating support plate which is connected with the third upper sliding block and the fourth upper sliding block, a first lower floating support plate which is connected with the first lower sliding block and the third lower sliding block, and a second lower floating support plate which is connected with the second lower sliding block and the fourth lower sliding block;
the guide mechanism comprises a vertical guide rail fixed on the rope pulley support and a sliding block matched with the vertical guide rail, and the sliding block is fixedly connected with the steel wire rope mounting frame through a floating support plate.
2. The device for monitoring damage caused by rolling and sliding friction coupling of the steel wire rope and the pulley groove of claim 1, wherein one end of the rolling and sliding steel wire rope is in threaded connection with one end of the horizontal tensioning plate through a bolt.
3. The wireline-pulley groove-roll, sliding-friction coupling damage monitoring device of claim 1, wherein the solution spraying mechanism comprises: the water pump is connected with one end of the hose, and the other end of the hose spans the upper supporting plate and then is connected with the container;
the upper supporting plate is provided with a window, a nozzle is arranged on the hose positioned at the window, and the nozzle is aligned with the contact area of the steel wire rope and the wheel groove.
4. The device for monitoring damage caused by rolling and sliding friction coupling of the steel wire rope and the wheel groove as claimed in claim 1, wherein the L-shaped left connecting plate and the L-shaped right connecting plate are provided with a plurality of connecting holes for connecting the ends of the sliding steel wire rope at different height positions so as to change the contact length of the sliding steel wire rope and the wheel groove.
5. The device for monitoring the damage of the wire rope-wheel grooved roller and the sliding friction coupling according to claim 3, wherein a fastening bolt is arranged between the sliding block and the vertical guide rail.
6. A method for monitoring sliding friction of a steel wire rope-wheel groove, based on the device for monitoring rolling and sliding friction coupling damage of the steel wire rope-wheel groove in claim 1~5, comprising the steps of:
(a) Lifting the steel wire rope mounting rack to a certain height along the guide mechanism;
(b) Determining the contact arc length of the steel wire rope and the wheel groove, selecting a sliding steel wire rope (11) with a corresponding length, cleaning oil stain on the surface of the sliding steel wire rope, fixing the left end of the sliding steel wire rope (11) through a threaded hook and a corresponding threaded hole on an L-shaped left connecting plate (5-1), and connecting the right end of the sliding steel wire rope (11) with a tension and pressure sensor and fixing the right end of the sliding steel wire rope at the corresponding threaded hole on the L-shaped right connecting plate; further, when the slide wire rope (11) is set in a horizontal position, the tension of the slide wire rope (11) is adjusted to a set value by the tension bolt (30);
(c) Under the action of gravity, the steel wire rope mounting frame descends along the guide mechanism until the sliding steel wire rope (11) is in close contact with the wheel groove; the whole sliding steel wire rope (11) can move up and down along the guide mechanism along with the steel wire rope mounting rack;
the contact load of the sliding steel wire rope and the pulley groove friction pair is determined by the self weight of the whole steel wire rope mounting frame, the contact load of the sliding steel wire rope and the tension of the sliding steel wire rope in a non-horizontal state are adjusted by increasing the counter weight, and when the sliding steel wire rope is in contact with the pulley wheel in a horizontal state, the tension of the sliding steel wire rope is adjusted by the tension bolt;
(e) Setting operation parameters of a variable frequency motor (15), turning on a motor switch, and driving a rope wheel (9) to realize continuous rotation or positive and negative circulation rotation under certain parameters;
(f) Spraying a corrosive solution on a contact friction pair position of a rope wheel in an experimental process through a solution spraying mechanism, simulating the sliding friction behavior of a sliding steel wire rope (11) and the rope wheel (9) in a given corrosive solution environment, detecting a tension change signal and a torque signal of the sliding steel wire rope through a tension pressure sensor (22), a dynamic torque sensor (18), a data acquisition card and an upper computer, and calculating to obtain a sliding friction coefficient between the sliding steel wire rope (11) and a wheel groove through an Euler formula;
(g) After the experiment is finished, the sliding steel wire rope (11) is taken down, damage characteristic detection is carried out through an SEM-EDS, a three-dimensional morphology measuring instrument and an industrial CT tool, and the abrasion-corrosion coupling damage characteristic mechanism of the sliding steel wire rope (11) can be analyzed and revealed.
7. A method for monitoring rolling friction of a steel wire rope-wheel groove is based on the device for monitoring rolling friction and sliding friction coupling damage of the steel wire rope-wheel groove according to any one of claims 1~5, and is characterized by comprising the following steps of:
(a) Connecting a rolling and sliding steel wire rope (26) with a tension pressure sensor (22), fixing the rolling and sliding steel wire rope on a horizontal tensioning plate, and tensioning the rolling and sliding steel wire rope to a set value through a bolt; the contact load of the rolling steel wire rope and the pulley groove friction pair is determined by the integral dead weight of the steel wire rope mounting frame provided with the horizontal fixing frame, the transverse slide rail and the translation slide block, and the tension of the rolling steel wire rope is controlled by the adjusting bolt;
(b) Fixing the horizontal fixing frame (29) on the upper supporting plate (4) through bolts;
(c) Adjusting the direction of the hose (12), fixing the hose on the lower surface of a horizontal tensioning plate (27), and aligning a nozzle (23) with the contact area of a rolling steel wire rope (26) and a wheel groove;
(d) Setting parameters of a variable frequency motor (15), controlling the variable frequency motor to rotate in a forward and reverse circulation reciprocating manner, collecting measurement data of a displacement sensor (25), and analyzing a change rule of a rolling and sliding friction state of the variable frequency motor; the sliding displacement is measured by a displacement sensor arranged on a horizontal fixing frame, and the rolling contact state between a rolling steel wire rope and a wheel groove is monitored by comparing the rotating arc length of the wheel groove of the rope wheel and the horizontal displacement of the rolling steel wire rope;
(e) Spraying a corrosion solution on a contact friction pair position of a rope wheel in an experimental process through a solution spraying mechanism, simulating the rolling friction behavior of a rolling steel wire rope (26) and the rope wheel (9) in a given corrosion solution environment, detecting a tension change signal and a torque signal of the rolling steel wire rope through a tension pressure sensor (22), a dynamic torque sensor (18), a data acquisition card and an upper computer, and calculating to obtain the rolling friction coefficient between the rolling steel wire rope (26) and a wheel groove through an Euler formula;
(f) After the experiment is finished, the rolling and sliding steel wire rope (26) is taken down, damage characteristic detection is carried out through an SEM-EDS, a three-dimensional morphology measuring instrument and an industrial CT tool, and the abrasion-corrosion coupling damage characteristic mechanism of the rolling and sliding steel wire rope (26) can be analyzed and revealed.
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