CN101216397B - Elevator armored rope bending fatigue state experimental bench - Google Patents
Elevator armored rope bending fatigue state experimental bench Download PDFInfo
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- CN101216397B CN101216397B CN2008100324683A CN200810032468A CN101216397B CN 101216397 B CN101216397 B CN 101216397B CN 2008100324683 A CN2008100324683 A CN 2008100324683A CN 200810032468 A CN200810032468 A CN 200810032468A CN 101216397 B CN101216397 B CN 101216397B
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Abstract
A bending fatigue test platform of wire rope for an elevator in the field of mechanical technology comprises a traction wheel, a frequency-variable motor, a data collecting and control device, a host computer platform, a hydraulic pump, a hydraulic cylinder, a tension sensor, a tension pulley, a wire rope, a rope head device, a connection terminal and a guide support, wherein the traction wheel and the tension wheel are positioned on both ends of the test platform; the guide support is positioned between the traction wheel and the tension pulley; the wire rope is wound in the grooves of the traction wheel, the guide wheel of the guide support and the tension pulley; the shaft of the tension wheel is connected with the tension sensor; the tension sensor is connected with the hydraulic cylinder; the hydraulic cylinder is connected with a hydraulic pump; the frequency-variable motor, the hydraulic pump and the tension sensor are connected with the data collecting and control device; and the data collecting and control device is connected with the host computer platform, which is in charge of monitoring, recording and control. The invention can adjust the wrap angle, the bending state, the tension and the travel of the bending fatigue test of wire rope more flexibly.
Description
Technical field
The present invention relates to a kind of device of field of mechanical technique, specifically is a kind of elevator armored rope bending fatigue state experimental bench.
Background technology
Wire rope is as the vitals of traction elevator, plays crucial effects for the security of operation of elevator.The mobile dependence wire rope of wire rope and the friction force between the traction race in the elevator, and for the requirement of transmission and space constraint, have certain angle sheave in the elevator suspension system, and make the case of bending of wire rope become very complicated.Therefore observation and research elevator, have important practical significance to guarantee the safe handling of wire rope with the bending fatigue state of wire rope.Elevator does not also have corresponding national standard with the wire rope torture test at present, standard that can reference is hoisting machinery industry standard GB/T12347-1996 " an armored rope bending fatigue test method ", and this standard is non-adopting by equivalent international standard ISO2020:1984 " aircraft is used wire rope with handling ".GB/T12347-1996 has stipulated scope, term, testing machine, sample, test routine and the test report etc. of armored rope bending fatigue test.But because lift facility structure and the singularity used, reference standard design experiment mechanism voluntarily often during inherent concrete application of industry.
Find through literature search prior art, Zhou Chunming delivered paper " wire rope fatigue tester " in 2007 the 17th at " Chinese elevator " on the phase 68-70 page or leaf, this article improves the test method of GB/T12347-1996 regulation, independent research a kind of vertical fatigue tester, covered the main diameter range of used elevator wire rope.But existing repeated bend test functions of the equipments are single, and adopt the load mode of the type of drive and the lever counterweight formula of four-bar mechanism more.This driving and load mode structure are huge and complicated, and stroke and cornerite fixedly are not easy to regulate, and the carrying of counterweight and loading also lack dirigibility.Especially the driving and the load mode of they and elevator itself have very big difference, well the function mode of simulant elevator suspension.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of elevator armored rope bending fatigue state experimental bench is provided, make it can simulate the concrete structure of elevator running suspension, can be used for the detection of armored rope bending fatigue state under multiple tension force, the multiple winding, overcome existing armored rope bending fatigue testing table and drive deficiency complicated, function singleness.
The present invention is achieved through the following technical solutions, the present invention includes: traction sheave, stretching pulley, adjustable frequency motor, wire rope, the fag end device, splicing ear, the data Mining and Control Device, host computer platform, hydraulic pump, hydraulic cylinder, pulling force sensor, guiding trestle, annexation is: traction sheave and stretching pulley lay respectively at the two ends of experiment table, guiding trestle is between traction sheave and stretching pulley, wire rope is walked around traction sheave successively, guiding trestle and stretching pulley, the two ends of wire rope link together by fag end device and splicing ear, the wheel shaft of traction sheave links to each other with the output shaft of adjustable frequency motor, the wheel shaft of stretching pulley links to each other with pulling force sensor one end, the other end of pulling force sensor links to each other with hydraulic cylinder, hydraulic cylinder links to each other with hydraulic pump, adjustable frequency motor, hydraulic pump all links to each other with the data Mining and Control Device with pulling force sensor, pulling force sensor is responsible for measuring the suffered pulling force of stretching pulley, the data Mining and Control Device is responsible for gathering the state of adjustable frequency motor and hydraulic pump and the measured value of pulling force sensor, and the result transmission of acquisition monitoring given and host computer platform, operational order with host computer platform is delivered to adjustable frequency motor and hydraulic pump simultaneously, and host computer platform is responsible for result according to the data Mining and Control Device to adjustable frequency motor, the duty of hydraulic pump and pulling force sensor is monitored, record and control.
Described traction sheave, stretching pulley, its race is positioned at same perpendicular.
Described traction sheave is a plug-in package, only need consider that the output shaft of traction wheel shaft and variable-frequency motor cooperatively interacts when changing traction sheave.
Described adjustable frequency motor axially is connected with traction sheave, and for the rotation of traction sheave provides power, this type of drive is simply compact, has avoided the four traditional shortcomings that connecting rod drives structure volume is big, noise is big.
Described stretching pulley is a plug-in package, adopts semicircle grooving, and only need cooperatively interact with corresponding wheel shaft when changing stretching pulley gets final product, and stretching pulley freely rotates around its wheel shaft, and can move horizontally under the guiding of its wheel shaft.
Described wire rope, its cornerite that is wrapped on the stretching pulley is 180 °, guarantee hydraulic cylinder be applied to pulling force on the stretching pulley by accurate mean allocation to stretching pulley up and down in the wire rope of both sides, promptly the tension value in a certain moment is 1/2nd of a pulling force sensor reading in the wire rope.
Described host computer platform makes wire rope obtain to move and produce tension force in rope by the rotation of hardware operation adjustable frequency motor and the output of hydraulic pump, and the size of tension force is determined by the measured value and the feedback numerical value of pulling force sensor; Perhaps come and go the expectation value of tension force in speed, stroke and the rope that rotates by the software set adjustable frequency motor, and the measured value of pulling force sensor and expectation value of thrust carried out real-time comparison, when measured value less than or greater than expectation value the time, automatically pressurization of primer fluid press pump or decompression, when equaling expectation value, measured value closes hydraulic pump automatically, to guarantee that in the motion process of wire rope pulling force is constant all the time in the rope.
Described guiding trestle is provided with three and is in the same perpendicular, equal diameters and have the angle sheave of semicircle grooving, two angle sheave height that wherein are in the left side equate and all are higher than an angle sheave on the right, wire rope stretches out from traction sheave, walk around two angle sheaves on the left side in the same way successively, oppositely walk around rightmost angle sheave, twine to stretching pulley again, the lower edge of rightmost angle sheave is concordant with the upper edge of stretching pulley, the cornerite of wire rope on stretching pulley is 180 °, equal and the traction sheave of the race of three angle sheaves, stretching pulley is positioned at same perpendicular, three angle sheaves all are replaceable structures, its diameter can change according to the specific requirement of test, and can be with wheel shaft up and down or move left and right.Only need cooperatively interact when changing angle sheave and get final product with corresponding wheel shaft.This structure is used for the in the same way combination repeated bend test of elevator with wire rope.
Described guiding trestle is provided with three and is in the same perpendicular, equal diameters and have the angle sheave of semicircle grooving, the position of angle sheave is higher than two angle sheaves on both sides wherein, wire rope stretches out from traction sheave, oppositely walk around earlier leftmost angle sheave, angle sheave in the middle of oppositely walking around then, oppositely walk around rightmost angle sheave again, twine to stretching pulley at last, the wire rope two ends link together by fag end device and splicing ear, the lower edge of rightmost angle sheave is concordant with the upper edge of stretching pulley, the cornerite of wire rope on stretching pulley is 180 °, equal and the traction sheave of the race of three angle sheaves, stretching pulley is positioned at same perpendicular, three angle sheaves all are replaceable structures, and its diameter can change according to the specific requirement of test, and can be with wheel shaft up and down or move left and right.Only need cooperatively interact when changing angle sheave and get final product with corresponding wheel shaft.This structure is used for the reverse combination repeated bend test of elevator with wire rope.
When the present invention works, wire rope is wrapped in traction sheave respectively simultaneously, in the angle sheave on the guiding trestle and the grooving of stretching pulley, when traction sheave rotates, under the drive of friction force between wire rope and the traction race, wire rope is produced mobile by the traction sheave towing, motion along with wire rope, angle sheave on stretching pulley and the guiding trestle also rotates under the effect of wire rope friction force, adjustable frequency motor and traction sheave can come and go according to the program of setting in the host computer platform and rotate, thereby cause sample wire rope alternating bending winding, with the lifter motion repeatedly of car and counterweight in the simulation elevator running.The motion of host computer platform control hydraulic pump, hydraulic pump drives stretching pulley by hydraulic cylinder, stretching pulley moves horizontally under the effect of hydraulic cylinder and with the wire rope tensioning, the state of adjustable frequency motor and the round number of times that rotates return host computer platform by the data Mining and Control Device, the size of tension force is passed host computer platform back in real time by the pulling force sensor measurement and by the data Mining and Control Device in the wire rope, when the expectation value of the measured value of pulling force and setting is inconsistent, tension force in the rope is regulated in motion by host computer platform control hydraulic pump, to reach the purpose of constant tension in the rope.According to wire rope different winding characteristic and concrete test objective in motion process, a certain specific crooked ran in the rope is defined as fatigue state observation section.At duration of test, every 24 hours or according to testing requirements, observe and write down the variation of restrict in this ran footpath reduction rate and broken wires, obtain the process of armored rope bending fatigue.The number of times that adjustable frequency motor rotates repeatedly, it is the number of bends of wire rope, by the host computer platform record, when the diameter of observation ran reduced to surpass corresponding country/international standard with the quantity of broken wires, the number of bends of final entry was the flexible life of sample wire rope.
Compared with prior art, the present invention has following beneficial effect: the present invention can be used to carry out elevator with the independent bending fatigue state of wire rope, in the same way make up the bending fatigue state, oppositely make up the observation experiment of bending fatigue state, by changing traction sheave, stretching pulley and angle sheave, the diameter range of most of elevator be can cover, and can difference according to actual needs multiple canoe, cornerite and tension force be changed with wire rope.Compare with traditional wire rope repeated bend test platform, the present invention has abandoned the tensioning system of the type of drive and the lever counterweight formula of four-bar mechanism, make the whole test platform be close to the suspension of elevator running more, structure is simple more compact, operates more flexible.The tension force of the wire rope among the present invention carries out linearity by the operation of hydraulic pump and hydraulic cylinder and changes, and avoid the heavy operation of traditional counterweight formula strainer, simulate the load condition of wire rope two ends car/counterweight in the elevator running simultaneously, more approached actual condition.
Description of drawings
Structural representation when Fig. 1 is the independent repeated bend test platform of wire rope for the present invention;
Initial and the final position synoptic diagram that wire rope once moved when Fig. 2 carried out the test of the independent bending fatigue state of wire rope for the present invention;
Fig. 3 is the structural representation of wire rope when making up the repeated bend test platform in the same way for the present invention;
Fig. 4 makes up the initial and final position synoptic diagram that bending fatigue state when test wire rope once moves in the same way for the present invention carries out wire rope;
Fig. 5 is the structural representation of wire rope when oppositely making up the repeated bend test platform for the present invention;
Fig. 6 oppositely makes up the initial and final position synoptic diagram that bending fatigue state when test wire rope once moves for the present invention carries out wire rope.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
Present embodiment is used for the independent repeated bend test of elevator with wire rope.
As shown in Figure 1, present embodiment comprises: traction sheave 1, adjustable frequency motor 2, data Mining and Control Device 3, host computer platform 4, hydraulic pump 5, hydraulic cylinder 6, pulling force sensor 7, stretching pulley 8, wire rope 9, guiding trestle 10, fag end device 11 and splicing ear 12, traction sheave 1 and stretching pulley 8 lay respectively at the two ends of experiment table, guiding trestle 10 is between traction sheave 1 and stretching pulley 8, wire rope 9 is walked around traction sheave 1 successively, guiding trestle 10 and stretching pulley 8, the two ends of wire rope 9 link together by fag end device 11 and splicing ear 12, the wheel shaft of traction sheave 1 links to each other with the output shaft of adjustable frequency motor 2, the wheel shaft of stretching pulley 8 links to each other with pulling force sensor 7 one ends, the other end of pulling force sensor 7 links to each other with hydraulic cylinder 6, hydraulic cylinder 6 links to each other with hydraulic pump 5, adjustable frequency motor 2, hydraulic pump 5 all links to each other with data Mining and Control Device 3 with pulling force sensor 7, pulling force sensor 7 is responsible for measuring the suffered pulling force of stretching pulley 8, data Mining and Control Device 3 is responsible for gathering adjustable frequency motor 2 and the state of hydraulic pump 5 and the measured value of pulling force sensor 7, and the result transmission of acquisition monitoring given and host computer platform 4, operational order with host computer platform 4 is delivered to adjustable frequency motor 2 and hydraulic pump 5 simultaneously, and host computer platform 4 is responsible for result according to data Mining and Control Device 3 to adjustable frequency motor 2, the duty of hydraulic pump 5 and pulling force sensor 7 is monitored, record and control.
On the described guiding trestle 10 angle sheave is not set, wire rope 9 directly strides across traction sheave 1 and is connected with splicing ear 12 by fag end device 11 with stretching pulley 8 backs, and the cornerite that wire rope 9 twines on traction sheave 1 and stretching pulley 8 all is 180 °.
Described traction sheave 1, stretching pulley 8, its race all is positioned at same perpendicular.
Described traction sheave 1 is a plug-in package, only need consider that the output shaft of traction wheel shaft and variable-frequency motor 2 cooperatively interacts when changing traction sheave 1.
Described adjustable frequency motor 2 axially is connected with traction sheave 1, and for the rotation of traction sheave 1 provides power, this type of drive is simply compact, has avoided the four traditional shortcomings that connecting rod drives structure volume is big, noise is big.
Described stretching pulley 8 is a plug-in package, adopts semicircle grooving, and only need cooperatively interact with corresponding wheel shaft when changing stretching pulley 8 gets final product, and stretching pulley 8 freely rotates around its wheel shaft, and can move horizontally under the guiding of its wheel shaft.
Described wire rope 9, its cornerite that twines on stretching pulley 8 is 180 °, guarantee hydraulic cylinder 6 be applied to pulling force on the stretching pulley 8 by accurate mean allocation to stretching pulley up and down in the wire rope of both sides, promptly the tension value in a certain moment is 1/2nd of a pulling force sensor reading in the wire rope 9.
Described host computer platform 4 is responsible for the state of adjustable frequency motor 2, hydraulic pump 5 and pulling force sensor 7 is monitored and controlled, its operation is divided into manually and automatic two kinds of patterns: under manual mode, change the rotation of adjustable frequency motor 2 and the output of hydraulic pump 5 by hardware operation, so that make wire rope 9 obtain to move and produce tension force in rope, the size of tension force is determined by the measurement and the feedback numerical value of pulling force sensor 7; Under automatic mode, come and go the expectation value of tension force in speed, stroke and the wire rope 9 that rotates by software set adjustable frequency motor 2, and the measured value of pulling force sensor 7 and expectation value of thrust carried out real-time comparison, when measured value less than or greater than expectation value the time, automatically 5 pressurizations of primer fluid press pump or decompression, when equaling expectation value, measured value closes hydraulic pump 5 automatically, to guarantee that in the motion process of wire rope 9 pulling force is constant all the time in the rope.
During present embodiment work, the selection of traction sheave 1 and stretching pulley 8 is consistent with the physical unit in the elevator, equally according to testing requirements, on host computer platform 4, set adjustable frequency motor 2 reciprocal velocity of rotation and strokes, and tension value in the setting wire rope, tension value can be chosen for 1/12 of sample wire rope 9 disrumpent feelings tension force, 1/15,1/17,1/20 and 1/23, the operation of host computer platform 4 is placed automatic mode, adjustable frequency motor 2 drives traction sheave 1 and wire rope 9 is done reciprocal motion, as shown in Figure 2, a ran AB will twine in the race of traction sheave 1 repeatedly in the middle of the wire rope 9, crooked and stretching, the initial position that wire rope 9 once moves is the joint just, lower end of B point and traction sheave 1, shown in Fig. 2 (a), final position is the joint just, upper end of A point and traction sheave 1, shown in Fig. 2 (b).Tension force in the test in the wire rope 9 carries out real-time measurement by pulling force sensor 7, and pass host computer platform 4 back and compare with the setting value of pulling force by data Mining and Control Device 3, when measured value and setting value is different is, adjust by data Mining and Control Device 3 operation hydraulic pumps 5 and hydraulic cylinder 6 by host computer platform 4.At duration of test, every 24 hours or according to testing requirements, observe and write down the variation of restrict in this ran footpath reduction rate and broken wires, obtain the process of wire rope 9 bending fatigues.The number of times that adjustable frequency motor 2 rotates repeatedly, it is the number of bends of wire rope 9, by host computer platform 4 records, when the diameter of observation ran reduced to surpass corresponding country/international standard with the quantity of broken wires, the number of bends of final entry was the flexible life of sample wire rope 9.
Present embodiment is used for the in the same way combination repeated bend test of elevator with wire rope.
As shown in Figure 3, the one-piece construction of present embodiment and embodiment 1 are basic identical, wherein: guiding trestle 10 is provided with three and is in the same perpendicular, equal diameters and have the angle sheave 13 of semicircle grooving, 14 and 15, wherein angle sheave 13 and angle sheave 14 highly equate and all are higher than angle sheave 15, wire rope 9 is walked around angle sheave 13 and angle sheave 14 after stretching out from traction sheave 1 in the same way successively, oppositely walk around angle sheave 15 then, twine to stretching pulley 8 again, the lower edge of angle sheave 15 is concordant with the upper edge of stretching pulley 8, guarantees that the cornerite of wire rope 9 on stretching pulley 8 is 180 °.The race of three angle sheaves all is positioned at same perpendicular with traction sheave, stretching pulley, three angle sheaves all are replaceable structures, its diameter can change according to the specific requirement of test, and can be with wheel shaft up and down or move left and right, only needs when changing angle sheave cooperatively interact with corresponding wheel shaft to get final product.
During present embodiment work, traction sheave 1, stretching pulley 8 and angle sheave 13,14 and 15 selection, and the cornerite between each wheel is consistent with the physical unit in the elevator with distance, equally according to testing requirements, on host computer platform 4, set adjustable frequency motor 2 reciprocal velocity of rotation and strokes, and tension value in the setting wire rope 9, tension value can be selected 1/12 of sample wire rope 9 disrumpent feelings tension force, 1/15,1/17,1/20 and 1/23, the operation of host computer platform 4 is placed automatic mode, adjustable frequency motor 2 will drive traction sheave 1 and wire rope 9 is done reciprocal motion, as shown in Figure 4, a ran AB twines in the race of traction sheave 1 repeatedly in the wire rope 9, crooked and stretching, the cornerite that wire rope 9 twines on traction sheave 1 depends on the height of angle sheave 13 and 14, the cornerite that wire rope 9 twines on angle sheave 13 depends on the vertical and horizontal range between angle sheave 13 and the traction sheave 1, these two cornerites can specifically be set according to testing requirements, distance between three angle sheaves, stroke decision by 9 one-way movements of wire rope, the initial position that wire rope 9 once moves just contacts with traction sheave 1 lower end for a B, shown in Fig. 4 (a), final position is that AB is between angle sheave 13 and angle sheave 14, shown in Fig. 4 (b), ran AB promptly in one stroke simultaneously by traction sheave 1 and angle sheave 13 and homotropous ran takes place, in experiment, should avoid observing ran AB and angle sheave 14 to interfere during the stroke of wire rope 9, it is the upper edge that the position of B end points can only reach angle sheave 14 farthest, hence one can see that, and in fact the length of observation ran AB will be subjected to the restriction of the horizontal range between angle sheave 13 and the angle sheave 14 in the test.Tension force in the test in the wire rope 9 carries out real-time measurement by pulling force sensor 7, and pass host computer platform 4 back and compare with the setting value of pulling force by data Mining and Control Device 3, when measured value and setting value is different is, adjust by data Mining and Control Device 3 operation hydraulic pumps 5 and hydraulic cylinder 6 by host computer platform 4.At duration of test, every 24 hours or according to testing requirements, observe and write down the variation of restrict in this ran footpath reduction rate and broken wires, obtain the degree of wire rope 9 bending fatigues.The number of times that adjustable frequency motor 2 rotates repeatedly, it is the number of bends of wire rope 9, by host computer platform 4 records, when the diameter of observation ran reduced to surpass corresponding country/international standard with the quantity of broken wires, the number of bends of final entry was the flexible life of sample wire rope 9.
Present embodiment is used for the reverse combination repeated bend test of elevator with wire rope.
As shown in Figure 5, the one-piece construction of the apparatus structure of present embodiment and embodiment 1 is basic identical, wherein: on the guiding trestle 10 be provided with three be in the same perpendicular, equal diameters and have the angle sheave 13,14 and 15 of semicircle grooving, wherein the position of angle sheave 14 is higher than angle sheave 13 and 15, wire rope 9 stretches out the back from traction sheave 1 and oppositely walks around earlier angle sheave 13, oppositely walk around angle sheave 14 then, oppositely walk around angle sheave 15 again, twine to stretching pulley 8 at last, its two ends link together by fag end device 11 and splicing ear 12.The lower edge of angle sheave 15 is concordant with the upper edge of stretching pulley 8, guarantee that the cornerite of wire rope 9 on stretching pulley 8 is 180 °, the race of three angle sheaves all is positioned at same perpendicular with traction sheave, stretching pulley, three angle sheaves all are replaceable structures, its diameter can change according to the specific requirement of test, and can be with wheel shaft up and down or move left and right, only needing when changing angle sheave cooperatively interact with corresponding wheel shaft gets final product.
During present embodiment work, the selection of traction sheave 1, stretching pulley 8 and angle sheave 13,14 and 15, and the cornerite between each wheel is consistent with the parts in the elevator running with distance.Equally according to testing requirements, on host computer platform 4, set adjustable frequency motor 2 reciprocal velocity of rotation and strokes, and tension value in the setting wire rope 9, tension value may be selected to be 1/12,1/15,1/17,1/20 and 1/23 of sample wire rope 9 disrumpent feelings tension force, the operation of host computer platform 4 is placed automatic mode, the starting characteristics test platform, adjustable frequency motor 2 will drive traction sheave 1 and wire rope 9 is done reciprocal motion, as shown in Figure 6, a ran AB will winding repeatedly, crooked and stretching in the traction race in the wire rope 9.At this moment, the cornerite that wire rope 9 twines on traction sheave 1 depends on the height of angle sheave 13, the cornerite that wire rope 9 twines on angle sheave 13 not only depends on the vertical and horizontal range between angle sheave 13 and the traction sheave 1, the position of also depending on angle sheave 14, these two cornerites can specifically be set according to testing requirements.Distance between three angle sheaves is by the stroke decision of 9 one-way movements of wire rope.The initial position that wire rope 9 once moves just contacts with traction sheave 1 lower end for a B, shown in Fig. 6 (a), final position is that AB is between angle sheave 13 and angle sheave 14, shown in Fig. 6 (b), ran AB promptly in one stroke simultaneously by traction sheave and angle sheave 13 and the ran of back-flexing takes place.In this test, should avoid observing ran AB and angle sheave 14 to interfere during the stroke of wire rope 9, promptly the position of B end points can only reach the left margin of angle sheave 14 farthest.Hence one can see that, and in fact the length of observation ran AB will be subjected to the restriction of the outer tangent distance between angle sheave 13 and the angle sheave 14 in the test.Tension force in the test in the wire rope 9 carries out real-time measurement by pulling force sensor 7, and pass host computer platform 4 back and compare with the setting value of pulling force by data Mining and Control Device 3, when measured value and setting value is different is, adjust by data Mining and Control Device 3 operation hydraulic pumps 5 and hydraulic cylinder 6 by host computer platform 4.At duration of test, every 24 hours or according to testing requirements, observe and write down the variation of restrict in this ran footpath reduction rate and broken wires, just can know the process of wire rope 9 bending fatigues.The number of times that adjustable frequency motor 2 rotates repeatedly, it is the number of bends of wire rope 9, by host computer platform 4 records, when the diameter of observation ran reduced to surpass corresponding country/international standard with the quantity of broken wires, the number of bends of final entry was the flexible life of sample wire rope 9.
Above-mentioned three embodiment are respectively applied for elevator with the independent bending fatigue state of wire rope, make up the bending fatigue state in the same way, oppositely make up the observation experiment of bending fatigue state, by changing traction sheave, stretching pulley and angle sheave, can cover the diameter range of most of elevator with wire rope, and can difference according to actual needs change multiple canoe, cornerite and tension force, abandoned the tensioning system of the type of drive and the lever counterweight formula of four-bar mechanism on the one hand, make the whole test platform be close to the suspension of elevator running more, structure is simple more compact, operate more flexible, the tension force of wire rope carries out the linearity change by the operation of hydraulic pump and hydraulic cylinder on the other hand, and avoid the heavy operation of traditional counterweight formula strainer, simulate the load condition of wire rope two ends car/counterweight in the elevator running simultaneously, more approached actual condition.
Claims (7)
1. elevator armored rope bending fatigue state experimental bench, comprise: traction sheave, stretching pulley, adjustable frequency motor, wire rope, fag end device and splicing ear, it is characterized in that, also comprise: the data Mining and Control Device, host computer platform, hydraulic pump, hydraulic cylinder, pulling force sensor and guiding trestle, wherein: traction sheave and stretching pulley lay respectively at the two ends of experiment table, guiding trestle is between traction sheave and stretching pulley, wire rope is walked around traction sheave successively, guiding trestle and stretching pulley, the two ends of wire rope link together by fag end device and splicing ear, the wheel shaft of traction sheave links to each other with the output shaft of adjustable frequency motor, the wheel shaft of stretching pulley links to each other with pulling force sensor one end, the other end of pulling force sensor links to each other with hydraulic cylinder, hydraulic cylinder links to each other with hydraulic pump, adjustable frequency motor, hydraulic pump all links to each other with the data Mining and Control Device with pulling force sensor, pulling force sensor is responsible for measuring the suffered pulling force of stretching pulley, the data Mining and Control Device is responsible for gathering the state of adjustable frequency motor and hydraulic pump and the measured value of pulling force sensor, and the result transmission of acquisition monitoring given and host computer platform, operational order with host computer platform is delivered to adjustable frequency motor and hydraulic pump simultaneously, host computer platform is responsible for result according to the data Mining and Control Device to adjustable frequency motor, the duty of hydraulic pump and pulling force sensor is monitored, record and control, described stretching pulley is semicircle grooving, stretching pulley freely rotates around its wheel shaft, and moves horizontally under the guiding of its wheel shaft.
2. elevator armored rope bending fatigue state experimental bench according to claim 1 is characterized in that the race of traction sheave and stretching pulley is positioned at same perpendicular.
3. elevator armored rope bending fatigue state experimental bench according to claim 1 is characterized in that described adjustable frequency motor axially is connected with traction sheave.
4. elevator armored rope bending fatigue state experimental bench according to claim 1 is characterized in that, the cornerite that described wire rope twines on traction sheave and stretching pulley is 180 °.
5. elevator armored rope bending fatigue state experimental bench according to claim 1, it is characterized in that, described host computer platform is by the rotation of hardware operation adjustable frequency motor and the output of hydraulic pump, make wire rope obtain to move and produce tension force in rope, the size of tension force is determined by the measured value and the feedback numerical value of pulling force sensor; Perhaps come and go the expectation value of tension force in speed, stroke and the rope that rotates by the software set adjustable frequency motor, and the measured value of pulling force sensor and expectation value of thrust carried out real-time comparison, when measured value less than or greater than expectation value the time, automatically pressurization of primer fluid press pump or decompression, when equaling expectation value, measured value closes hydraulic pump automatically, to guarantee that in the motion process of wire rope pulling force is constant all the time in the rope.
6. elevator armored rope bending fatigue state experimental bench according to claim 1, it is characterized in that, described guiding trestle is provided with three and is in the same perpendicular, equal diameters and have the angle sheave of semicircle grooving, two angle sheave height that wherein are in the left side equate and all are higher than an angle sheave on the right, wire rope stretches out from traction sheave, walk around two angle sheaves on the left side in the same way successively, oppositely walk around rightmost angle sheave, twine to stretching pulley again, the lower edge of rightmost angle sheave is concordant with the upper edge of stretching pulley, the cornerite of wire rope on stretching pulley is 180 °, and the race of three angle sheaves all is positioned at same perpendicular with traction sheave and stretching pulley.
7. elevator armored rope bending fatigue state experimental bench according to claim 1, it is characterized in that, described guiding trestle is provided with three and is in the same perpendicular, equal diameters and have the angle sheave of semicircle grooving, the position of angle sheave is higher than two angle sheaves on both sides wherein, wire rope stretches out from traction sheave, oppositely walk around earlier leftmost angle sheave, angle sheave in the middle of oppositely walking around then, oppositely walk around rightmost angle sheave again, twine to stretching pulley at last, the wire rope two ends link together by fag end device and splicing ear, the lower edge of rightmost angle sheave is concordant with the upper edge of stretching pulley, the cornerite of wire rope on stretching pulley is 180 °, and the race of three angle sheaves all is positioned at same perpendicular with traction sheave and stretching pulley.
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| Publication number | Priority date | Publication date | Assignee | Title |
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Cited By (2)
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| CN102323161A (en) * | 2011-05-31 | 2012-01-18 | 河南省煤炭科学研究院有限公司 | Mechanical horizontal steel wire rope bending fatigue testing machine and mechanical rotation driving device |
| CN102323161B (en) * | 2011-05-31 | 2013-06-26 | 河南省煤炭科学研究院有限公司 | Mechanical horizontal steel wire rope bending fatigue testing machine and mechanical rotation driving device |
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