CN102121889A - Bending fatigue test machine for steel wire rope in case of alternating load - Google Patents
Bending fatigue test machine for steel wire rope in case of alternating load Download PDFInfo
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- CN102121889A CN102121889A CN 201010602411 CN201010602411A CN102121889A CN 102121889 A CN102121889 A CN 102121889A CN 201010602411 CN201010602411 CN 201010602411 CN 201010602411 A CN201010602411 A CN 201010602411A CN 102121889 A CN102121889 A CN 102121889A
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Abstract
The invention provides a bending fatigue test machine for a steel wire rope in case of alternating load. The bending fatigue test machine comprises a frame, a steel wire rope test piece, a driving wheel, a drive unit, a proximity switch which are arranged on the frame, a power transmission system for driving the driving wheel to circularly rotate, and an electro-hydraulic servo system for supplying the alternating load to the steel wire rope test piece and a tensioning wheel, wherein the driving wheel, the drive unit and the proximity switch are arranged on the frame. In the invention, every time the tensioning wheel circularly rotates back and forth, the electro-hydraulic servo system changes the stress cycle of the steel wire rope once; then the proximity switch sends a counting signal; and finally the fatigue life of the steel wire rope is measured by counting cycle indexes. The test machine can be used for performing bending fatigue tests on various standard steel wire rope test pieces in the case of the alternating load, and applying various alternating loads on the steel wire rope test pieces. The test machine has a simple structure, and is easy to control.
Description
Technical field
Invention relates to a kind of equipment of technical field of measurement and test, the especially a kind of test wire rope wire rope variable load fatigue bending machine of fatigue lifetime when bearing alternate load that is applicable to.
Background technology
Along with pit mining constantly develops to the deep, the quantity of domestic deep-well and ultra deep well is more and more, because the lengthening greatly of friction drive hoist wire rope under the deep-well brings a series of problems for the operation of hoister wire rope.Show and the most outstanding be to use the life-span short, the life-span of opening hoisting cable in the super km deep-wells such as little building-owner's well, wax gourd mountain, Tongling main shaft in Xuzhou is on average less than 8 months, presentation is just fracture ahead of time when reaching term of life, fracture of wire quantity is more, fracture of wire is inhomogeneous etc., has seriously restricted mine hoisting safety and economy efficient.The theoretical analysis causes that the main cause of the early stage fracture of wire of wire rope under the deep-well is the bending fatigue destruction under the alternate load, so need a kind of testing machine that can test hoister wire rope flexible life under variable load, for the type selecting of using wire rope provides theoretical foundation.
Existing wire rope fatigue tester mainly is to concentrate on the fatigue lifetime of testing elevator and crane field use wire rope.As: Chinese patent ZL 03254225.9 discloses a kind of wire rope and pulley fatigue experimental device, and wire rope is around the fatigue behaviour of pulley during the operation of test crane; ZL 200810032468.3 discloses a kind of elevator armored rope bending fatigue state testing table, realizes wire rope forward in the elevator and the simulation of oppositely making up case of bending by traction sheave, stretching pulley and a plurality of angle sheave.Above-mentioned testing machine, it is fatigue experimental device at wire rope on crane and the elevator, wherein bending fatigue is the main cause that wire rope lost efficacy, yet the main cause of deep-well friction winding wire rope fatigue failure is that the amplitude of alternate load is excessive in the wire rope, bending fatigue destruction is not its main failure cause or is one of reason, so these fatigue experimental devices are not suitable for the prediction in serviceable life of deep-well friction drive hoist wire rope.
At present also there is not to test specially the deep-well friction winding wire rope variable load wire rope fatigue tester of fatigue lifetime, therefore can not simulate the real operating mode of friction winding wire rope, adopt existing equipment that the friction winding wire rope is carried out torture test, only can cause the damage of testing machine, for armored rope bending fatigue life test result also with differ too big actual life, the serious distortion of experimental data.
Summary of the invention
The order of invention is at the problem that exists in the prior art, and a kind of simple in structure, easy to operate, wire rope variable load fatigue bending machine that simulated effect is good is provided.
For achieving the above object, wire rope variable load fatigue bending machine of the present invention, comprise frame, respectively through driving shaft, the stretching pulley that the tensioning shaft symmetry is located at the driving wheel on the frame and is intertwined and connected through the test specimen wire rope, the stretching pulley inboard is provided with the hydraulic cylinder that is fixed on the frame, the piston rod of hydraulic cylinder is sleeved on the tensioning shaft of stretching pulley both sides through frame, the two ends of tensioning shaft are respectively equipped with Limit Bearing, Limit Bearing is located in the guide groove that is fixed on the frame, be connected with the electrohydraulic servo system that alternate load is provided on the hydraulic cylinder, the below of hydraulic cylinder is provided with and connects the drive unit that driving shaft drives the driving wheel reciprocally swinging, and the frame of driving shaft below is provided with near switch.
Described drive unit comprises the motor that is fixed on the frame, the speed reduction unit that links to each other with motor output shaft, be connected with a flywheel between speed reduction unit and the motor, the output shaft of speed reduction unit is provided with an eccentric wheel, is hinged with and is fixed on the hinged connecting rod of fork on the driving shaft on the eccentric wheel; Described electrohydraulic servo system comprises AC motor, the oil pump that links to each other with AC motor, is connected with tensimeter, the surplus valve that plays the safeguard protection effect that shows oil pressure and change, the electro-hydraulic servo pressure regulator valve of controlling oil liquid pressure successively on oil pump and the oil circuit that hydraulic cylinder links to each other.
Beneficial effect: the present invention can carry out the variable load repeated bend test to all kinds of wire rope standard specimens, especially at the prediction in serviceable life of deep-well friction winding wire rope.Can simulate various operating modes wire rope is applied dissimilar alternate loads, test the fatigue lifetime of wire rope under actual condition, study the mechanism of fatigue under its compound operating mode, predict its fatigue lifetime, instruct the type selecting of wire rope.And can apply dissimilar alternate loads to the wire rope test specimen, accurately control applies the amplitude of alternate load, well simulates the actual condition of wire rope, estimates the fatigue lifetime of wire rope under the various service conditions.For the hoisting cable failure mechanism of research deep-well friction drive hoist, prolong wire rope serviceable life, improve mine economic benefit, to promote the mine hoisting safety and efficiency significant.This testing machine structure is simple, is easy to control, and experimental data is accurate.
Description of drawings
Fig. 1 is the main TV structure synoptic diagram of invention.
Fig. 2 is the plan structure synoptic diagram of invention.
Fig. 3 is the electrohydraulic servo system principle schematic of invention.
Among the figure: driving wheel 1, driving shaft 2, fork 3, bearing seat 4, wire rope 5, connecting rod 6, speed reduction unit 7, hydraulic cylinder 8, flywheel 9, Limit Bearing 10, tensioning shaft 11, guide groove 12, stretching pulley 13, frame 14, eccentric wheel 15, motor 16, near switch 17, oil pump 18, fuel tank 19, AC motor 20, tensimeter 21, surplus valve 22, electro-hydraulic servo pressure regulator valve 23, oil filter 24.
Embodiment
Be further described below in conjunction with an embodiment to invention in the accompanying drawing:
As shown in Figure 1, 2, wire rope variable load fatigue bending machine of the present invention is mainly by frame 14, driving wheel 1, driving shaft 2, tensioning shaft 11, stretching pulley 13, wire rope 5, drive unit, electrohydraulic servo system, strainer and constitute near switch 17, driving wheel 1 and stretching pulley 13 are in same vertical plane, and wire rope test specimen 5 is wrapped on driving wheel 1 and the stretching pulley 13.Frame 14 is welded by shaped steel, left-right symmetric, driving shaft 2 is fixed on the left side of frame 14 through bearing seat 4, tensioning shaft 11 is in Limit Bearing 10 is located at the guide groove 12 on frame 14 right sides, driving wheel 1 and stretching pulley 13 are located at the middle part of driving shaft 2 and tensioning shaft 11 respectively, driving wheel 1 is through test specimen wire rope 5 stretching pulley 13 that is intertwined and connected, stretching pulley 13 inboards are provided with the hydraulic cylinder 8 that links to each other with its tensioning shaft 11, hydraulic cylinder 8 is fixed on the frame 14, and the piston rod of hydraulic cylinder 8 is sleeved on the tensioning shaft 11 of stretching pulley 13 both sides through frame; Be connected with the electrohydraulic servo system that alternate load is provided on the hydraulic cylinder 8, electrohydraulic servo system comprises AC motor 20, oil pump 18, fuel tank 19, tensimeter 21, surplus valve 22, electro-hydraulic servo pressure regulator valve 23, oil filter 24 and hydraulic cylinder 8, oil pump 18 links to each other with AC motor 20, is connected with tensimeter 21, surplus valve 22, electro-hydraulic servo pressure regulator valve 23 successively on oil pump 18 and the oil circuit that hydraulic cylinder 8 links to each other.AC motor 20 provides power source, makes oil pump 18 pressure oil output, filters through oil filter 24 and enters hydraulic cylinder 8 again; Electro-hydraulic servo pressure regulator valve 23 control oil liquid pressures; tensimeter 21 shows oil pressure; surplus valve 22 plays the safeguard protection effect in system; when system pressure surpasses setting; surplus valve 22 is opened; a part of pressure in the system is discharged, make system pressure be no more than permissible value, thereby the assurance system does not have an accident because of hypertonia.The below of strainer is provided with and connects the drive unit that driving shaft 2 drives driving wheel 1 reciprocally swinging, drive unit comprises motor 16, flywheel 9, speed reduction unit 7, eccentric wheel 15, connecting rod 6, fork 3, motor 16 is fixed on the frame 14, motor 16 output shafts are by flywheel 9 connection reducers 7, eccentric wheel 15 is fixed on 7 of the speed reduction units, the hinged eccentric wheel 15 of connecting rod 6 one ends, the hinged fork 3 of the other end, fork 3 fixed covers are at driving shaft 1 one ends, and wherein eccentric wheel 15, connecting rod 6 and fork 3 are formed a crank and rocker mechanism.The frame 14 of driving wheel 1 below is provided with near switch 17, and fork 3 is whenever finished once circulation swing, arrives control system with record wire rope test specimen 5 reversed bending number of times near count signal of switch 17 transmission.
The principle of work and the course of work: motor 16 drives eccentric wheel 15 rotations by flywheel 9, speed reduction unit 7, gives driving wheel 1 transmission of power through the crank endplay device again, driving wheel 1 circulation swing, and wire rope test specimen 5 is in driving wheel 1 and stretching pulley 13 cocycle bendings.Electrohydraulic servo system provides pressure oil to hydraulic cylinder 8, and the flexible promotion tensioning shaft 11 and the stretching pulley 13 of hydraulic cylinder 8 piston rods move horizontally, and makes 5 tensionings of wire rope test specimen and bears alternate load.Control system control hydraulic cylinder oil pressure pressure changes, the variation of simulation wire rope test specimen 5 load in lifting process.Near switch 17 count signal is transferred to control system, bears the cycle index of alternate load with monitoring wire rope test specimen 5.
Claims (3)
1. wire rope variable load fatigue bending machine, it is characterized in that: it comprises frame (14), respectively through driving shaft (2), the stretching pulley (13) that tensioning shaft (11) symmetry is located at the driving wheel (1) on the frame (14) and is intertwined and connected through test specimen wire rope (5), stretching pulley (13) inboard is provided with the hydraulic cylinder (8) that is fixed on the frame (14), the piston rod of hydraulic cylinder (8) is sleeved on the tensioning shaft (11) of stretching pulley (13) both sides through frame, the two ends of tensioning shaft (11) are respectively equipped with Limit Bearing (10), Limit Bearing (10) is located in the guide groove (12) that is fixed on the frame (14), hydraulic cylinder is connected with the electrohydraulic servo system that alternate load is provided on (8), the below of hydraulic cylinder (8) is provided with and connects the drive unit that driving shaft (2) drives driving wheel (1) reciprocally swinging, and the frame (14) of driving shaft (2) below is provided with near switch (17).
2. wire rope variable load fatigue bending machine according to claim 1, it is characterized in that: described drive unit comprises the motor (16) that is fixed on the frame (14), the speed reduction unit (7) that links to each other with motor (16) output shaft, be connected with a flywheel (9) between speed reduction unit (7) and the motor (16), the output shaft of speed reduction unit (7) is provided with an eccentric wheel (15), is hinged with and is fixed on the hinged connecting rod (6) of fork (3) on the driving shaft (1) on the eccentric wheel (15).
3. wire rope variable load fatigue bending machine according to claim 1; it is characterized in that: described electrohydraulic servo system comprises AC motor (20), the oil pump (18) that links to each other with AC motor (20), is connected with tensimeter (21), the surplus valve (22) that plays the safeguard protection effect that shows oil pressure and change, the electro-hydraulic servo pressure regulator valve (23) of controlling oil liquid pressure successively on oil pump (18) and the oil circuit that hydraulic cylinder (8) links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010602411 CN102121889A (en) | 2010-12-23 | 2010-12-23 | Bending fatigue test machine for steel wire rope in case of alternating load |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010602411 CN102121889A (en) | 2010-12-23 | 2010-12-23 | Bending fatigue test machine for steel wire rope in case of alternating load |
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| CN102121889A true CN102121889A (en) | 2011-07-13 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305742A (en) * | 2011-05-31 | 2012-01-04 | 河南省煤炭科学研究院有限公司 | Hydraulic horizontal steel wire rope bending fatigue testing machine and annular combined gasket |
| CN102564874A (en) * | 2012-01-14 | 2012-07-11 | 浙江工商大学 | Fatigue tester |
| CN103076246A (en) * | 2013-01-06 | 2013-05-01 | 北京航空航天大学 | Double-shaft high-low cycle complex fatigue tester |
| CN104614261A (en) * | 2015-01-30 | 2015-05-13 | 中国矿业大学 | Bending fatigue damage monitoring system for steel wire under action of corrosion-alternating load coupling |
| CN104647137A (en) * | 2015-01-12 | 2015-05-27 | 济南二机床集团有限公司 | Method for monitoring bending life of steel wire rope of CNC (Computer Numerical Control) floor type boring and milling machine |
| CN105258939A (en) * | 2015-11-29 | 2016-01-20 | 中山市捷信科技服务有限公司 | Automatic testing device |
| CN105445021A (en) * | 2016-01-08 | 2016-03-30 | 托肯恒山科技（广州）有限公司 | Natural gas high-pressure ball valve life test apparatus |
| CN106053227A (en) * | 2016-07-08 | 2016-10-26 | 中煤科工集团上海有限公司 | Mining equipment cable dragging and bending testing machine and testing method |
| CN108037030A (en) * | 2018-02-07 | 2018-05-15 | 青岛迪玛尔海洋工程有限公司 | Testing machine for the differently curved radius testing fatigue of cable |
| CN108507889A (en) * | 2018-04-11 | 2018-09-07 | 清华大学 | Fatigue test method and fatigue experimental device for flexible electronic device |
| CN110686991A (en) * | 2019-06-14 | 2020-01-14 | 大连理工大学盘锦产业技术研究院 | Underwater heavy-duty towing cable tension bending tester device |
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2010
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| CN2404115Y (en) * | 1999-12-02 | 2000-11-01 | 江苏法尔胜技术开发中心 | Variable load, impact low-periodic fatigue testing machine |
| CN101216397A (en) * | 2008-01-10 | 2008-07-09 | 上海交通大学 | Elevator armored rope bending fatigue state experimental bench |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305742B (en) * | 2011-05-31 | 2013-04-17 | 河南省煤炭科学研究院有限公司 | Hydraulic horizontal steel wire rope bending fatigue testing machine and annular combined gasket |
| CN102305742A (en) * | 2011-05-31 | 2012-01-04 | 河南省煤炭科学研究院有限公司 | Hydraulic horizontal steel wire rope bending fatigue testing machine and annular combined gasket |
| CN102564874A (en) * | 2012-01-14 | 2012-07-11 | 浙江工商大学 | Fatigue tester |
| CN102564874B (en) * | 2012-01-14 | 2014-01-29 | 浙江工商大学 | Fatigue tester |
| CN103076246A (en) * | 2013-01-06 | 2013-05-01 | 北京航空航天大学 | Double-shaft high-low cycle complex fatigue tester |
| CN103076246B (en) * | 2013-01-06 | 2014-10-22 | 北京航空航天大学 | Double-shaft high-low cycle complex fatigue tester |
| CN104647137B (en) * | 2015-01-12 | 2017-02-22 | 济南二机床集团有限公司 | Method for monitoring bending life of steel wire rope of CNC (Computer Numerical Control) floor type boring and milling machine |
| CN104647137A (en) * | 2015-01-12 | 2015-05-27 | 济南二机床集团有限公司 | Method for monitoring bending life of steel wire rope of CNC (Computer Numerical Control) floor type boring and milling machine |
| CN104614261A (en) * | 2015-01-30 | 2015-05-13 | 中国矿业大学 | Bending fatigue damage monitoring system for steel wire under action of corrosion-alternating load coupling |
| CN105258939A (en) * | 2015-11-29 | 2016-01-20 | 中山市捷信科技服务有限公司 | Automatic testing device |
| CN105445021A (en) * | 2016-01-08 | 2016-03-30 | 托肯恒山科技（广州）有限公司 | Natural gas high-pressure ball valve life test apparatus |
| CN106053227A (en) * | 2016-07-08 | 2016-10-26 | 中煤科工集团上海有限公司 | Mining equipment cable dragging and bending testing machine and testing method |
| CN106053227B (en) * | 2016-07-08 | 2019-03-12 | 上海煤科检测技术有限公司 | A kind of mining equipment cable towing circumnutates testing machine and test method |
| CN108037030A (en) * | 2018-02-07 | 2018-05-15 | 青岛迪玛尔海洋工程有限公司 | Testing machine for the differently curved radius testing fatigue of cable |
| CN108037030B (en) * | 2018-02-07 | 2024-02-02 | 青岛迪玛尔海洋工程有限公司 | Testing machine for fatigue testing of cables with different bending radii |
| CN108507889A (en) * | 2018-04-11 | 2018-09-07 | 清华大学 | Fatigue test method and fatigue experimental device for flexible electronic device |
| CN108507889B (en) * | 2018-04-11 | 2019-07-26 | 清华大学 | Fatigue test method and fatigue experimental device for flexible electronic device |
| CN110686991A (en) * | 2019-06-14 | 2020-01-14 | 大连理工大学盘锦产业技术研究院 | Underwater heavy-duty towing cable tension bending tester device |
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Application publication date: 20110713 |