CN202256052U - Tester for monitoring fretting fatigue state of steel wire - Google Patents
Tester for monitoring fretting fatigue state of steel wire Download PDFInfo
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- CN202256052U CN202256052U CN2011202456487U CN201120245648U CN202256052U CN 202256052 U CN202256052 U CN 202256052U CN 2011202456487 U CN2011202456487 U CN 2011202456487U CN 201120245648 U CN201120245648 U CN 201120245648U CN 202256052 U CN202256052 U CN 202256052U
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- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 208000010392 Bone Fractures Diseases 0.000 description 4
- 206010017076 Fracture Diseases 0.000 description 4
- 238000009661 fatigue test Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 229910001374 Invar Inorganic materials 0.000 description 2
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- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to a tester for monitoring a fretting fatigue state of a steel wire. The tester mainly consists of a base, a support vertical column, a top beam, a hydraulic lifting table and a horizontal loading device. The tester finish a test for monitoring the fretting fatigue state of the steel wire by the following steps of: respectively fixing two ends of the steel wire to be tested passing through the horizontal loading device, and drawing the two ends to be of preset initial loads; compressing the steel wire to be tested by a loading steel wire in the horizontal loading device by moving the horizontal loading device, controlling a hydraulic lifting table to move up and down to apply a cyclic loading to the steel wire to be tested so that the steel wire to be tested generates fretting fatigue and a tangential force is transferred to a spoke type tension-compression sensor through an inner-thread connection rod on a loading block, wherein an acoustic emission sensor is arranged on a clamping block on the top beam; and stopping test till the steel wire to be tested is broken due to the fretting fatigue. Through the tester for monitoring the fretting fatigue state of the steel wire, disclosed by the utility model, the tangential force among contacted steel wires and the acoustic emission sensor of the steel wire to be tested can be dynamically recorded during test, and an effective evidence is provided for research on a fretting region of the steel wire, fretting region crack generation, breakage mechanism, and the influence thereof on fretting fatigue service life. The tester disclosed by the utility model has the advantages of simple structure, convenience for operation and good effect.
Description
Technical field
The utility model relates to a kind of test unit, especially a kind of test unit that is applicable to dynamic monitoring steel wire fretting fatigue state.
Background technology
Wire rope has good crooked pliability and load-bearing capacity; Thereby being widely used as the pull-cord of Transport Machinery, the lifting hawser of mining machinery, the support hawser of manned ropeway, the bearer cable of cable-stayed bridge etc., the loading strength of wire rope and service life are all extremely important for these safe operations of using equipment.In the operational process of these equipments, wire rope will stand stretching and bending and dynamic load repeatedly, makes between inner each strand of wire rope, stands the fretting wear of different fine motion amplitudes between the steel wire in the thigh, but also will bear alterante stress.Less fine motion amplitude tends to cause crack initiation, expansion and the fracture of steel wire fretting contact region, forms fretting fatigue, the fatigure failure of aggravation wire rope.Therefore; A kind of test unit that can dynamic monitoring steel wire fretting fatigue state is provided; Inquire into the fretting wear mechanism between steel wire, steel wire in the fretting fatigue experimentation fine motion operation area characteristic, fine motion district crackle germinating and mechanism of fracture and to the steel wire fretting Fatigue Life; Reduction of wire rope fatigue strength and early fracture to invar silk fretting fatigue causes are predicted, to significance is arranged the serviceable life of improving wire rope.
The test method and the device that are used for fretting fatigue at present have: the patent No. is 200810304928.3 disclosed a kind of axial fatigue experimental approach and devices that major diameter axle class test specimen applied stacking abrasion load; Adopt reducer structure; Can be helpful to the sample fatigue break reason and the life prediction of while taking up wear load and fatigue load, but this experimental provision is applicable to axle type test specimen; The patent No. be 200910182122.6 with the disclosed a kind of steel wire fretting fatigue testing machine of 200920233073.X; Can only investigate different fretting fatigue parameters to the steel wire fretting Fatigue Life; Can not study the fretting fatigue failure mechanism of steel wire; In experimentation, the contact load between steel wire changes because of fretting wear; The patent No. is that 201020135448.1 disclosed a kind of adjustable fretting fatigue testing machines are through two actual fine motion situation of bearing of pressure head simulation member; Carry out the block test specimen Fretting Fatigue Damage test of two pressure head spatial offsets, but this experimental provision only is applicable to block test specimen.But, the steel wire fretting fatigue testing device of steel wire fretting influence fatigue lifetime is not also had for guaranteeing in the experimentation between steel wire that contact load is constant, can monitor fretting fatigue states such as tangential force between steel wire, steel wire acoustic emission behavior and displacement amplitude in real time and can investigating the fretting fatigue parameter.
Summary of the invention
The purpose of the utility model is to the problem that exists in the prior art, and a kind of test unit of monitoring steel wire fretting fatigue state simple in structure, easy-operating is provided.
The test unit of the monitoring steel wire fretting fatigue state of the utility model; Comprise base, be symmetricly set on the support post on the base; Support post is provided with back timber, and the middle part of base is provided with the hydraulic elevator platform that has displacement transducer, and back timber is provided with tension-compression sensor; On described support post, be provided with horizontal charger; With horizontal charger relatively the tension-compression sensor of top be provided with grip block, the lower surface of last grip block is provided with the acoustic emission device, the hydraulic elevator platform with horizontal charger below relative is provided with down grip block; Described horizontal charger comprises outer fixture block and the internal clamping block that is set on the support post; Two relative sides of internal clamping block are respectively equipped with groove, are provided with the spill horizontal seat that can slide at two ends in the groove within it, and the both sides, front and back are respectively equipped with guide type shoe in the spill horizontal seat; Be provided with the trapezoidal slide block that can slide in the guide type shoe within it; Be fixed with a left side on the end face of trapezoidal slide block and load steel wire, trapezoidal slide block opposite face is interval with loading blocks, and loading blocks is provided with the relative right side of loading steel wire, a left side and loads steel wire; Loading blocks is fixed on the π shape support through the boss connecting pin; π shape support is fixed on symmetry and is located on the L bracket on the spill horizontal seat, and the top of symmetrically arranged L bracket is coated with connecting pin, and the middle part of loading blocks is coated with the internal thread connecting link; Internal thread connecting link top is provided with the screw that matches with it, and the below is provided with the radial tension-compression sensor; The top of trapezoidal slide block is provided with L shaped link; The upper surface of L shaped link is provided with the circular hole that passes the test steel wire; Tail end is fixed with the counterweight traction rope; Counterweight traction rope pile warp connecting pin connects the weight tray that counterweight is housed, and the middle part of spill horizontal seat is provided with and the corresponding circular hole of L shaped link circular hole; The gap that described spill horizontal seat moves in two internal clamping block grooves is 2～6cm.
Beneficial effect: owing to adopted technique scheme; The form that adopts counterweight to load spurs trapezoidal slide block to applying contact load between steel wire; Guarantee in the experimentation contact load between steel wire between can the invar silk fretting wear and change; Compared with prior art; Can Real-time and Dynamic in the record experimentation tangential force between the contact steel wire change and the acoustic emission signal of test steel wire, to fretting wear characteristic, fine motion operation area characteristic, crack initiation and the mechanism of fracture between steel wire in the research fretting fatigue experimentation and to the influence research in fretting fatigue life-span effective experimental facilities and effective foundation are provided; Can investigate simultaneously fretting fatigue parameters such as contact load, fine motion amplitude, stress amplitude, stress ratio and frequency to test steel wire fretting Fatigue Life, this provides effective experimental assembly to the research steel wire because of fretting fatigue ruptures.It is simple in structure, and is easy and simple to handle, multiple functional, effective, in the present technique field, has practicality widely.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of the utility model.
Fig. 2 is that the level of the utility model loads and tangential force measurement mechanism structural representation.
Fig. 3 is the A-A view of Fig. 2.
Among the figure: the last grip block of 1-, 2-calibrate AE sensor, the outer fixture block of 3-, 4-internal clamping block, 5-support post, 6-base; The 7-hydraulic elevator platform, grip block under the 8-, 9-tests steel wire, 10-tension-compression sensor, 11-back timber, 12-counterweight; The 13-weight tray, 14-radial tension-compression sensor, 15-internal thread connecting link, 16-spill horizontal seat, 17-L shape link, 18-compressing tablet; The 19-screw, 20-counterweight traction rope, 21-connecting pin, 22-screw, 23-π shape support; 24-boss connecting pin, the 25-screw, the right steel wire that loads of 26-, a 27-left side loads steel wire, 28-guide type shoe; The trapezoidal slide block of 29-, 30-screw, 31-loading blocks, 32-screw, 33-L shape support.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done further description:
The test unit of the monitoring steel wire fretting fatigue state of the utility model; Mainly be made up of base 6, support post 5, back timber 11 and horizontal charger, support post 5 is symmetricly set on the base 6, and back timber 11 is located on the support post 5; The middle part of base 6 is provided with the hydraulic elevator platform 7 that has displacement transducer; Back timber 11 lower ends are provided with tension-compression sensor 10, on described support post 5, are provided with horizontal charger, with horizontal charger relatively the tension-compression sensor 10 of top be provided with grip block 1; The lower surface of last grip block 1 is provided with the acoustic emission device 2 that scribbles couplant, with horizontal charger relatively the hydraulic elevator platform 7 of below be provided with down grip block 8; Described horizontal charger comprises the outer fixture block 3 and internal clamping block 4 that is set on the support post 5; Two internal clamping block 4 relative sides are respectively equipped with trapezoidal groove; But be provided with the spill horizontal seat 16 of two ends move inside in the groove; Spill horizontal seat 12 two ends all are processed with trapezoidal slide block shape, and the centre is a horizonal base plate, and the gap that spill horizontal seat 16 moves in two internal clamping block 4 grooves is 2～6cm.Both sides are respectively equipped with guide type shoe 28 before and after in the spill horizontal seat 16; Be provided with the trapezoidal slide block 29 that can slide in the dovetail groove of guide type shoe 28 within it; Trapezoidal slide block 29 end face of test steel wire 9 one sides relatively is milled with semi-circular recesses; Be equipped with circular hole in notch end, a left side loads steel wire 27 and places groove, by penetrating in two circular holes and being fixed by screw 30; Trapezoidal slide block 29 opposite faces are interval with loading blocks 31; Loading blocks 31 is provided with the left side loading steel wire 27 relative right sides and loads steel wire 26; Loading blocks 31 end face of test steel wire 9 one sides relatively is milled with semi-circular recesses, is equipped with circular hole in notch end, and the right steel wire 26 that loads places groove; By penetrating in two circular holes and fixing with screw 25; Loading blocks 31 other ends are equipped with the through hole of middle straight line segment, two terminal circle segmental arc, and loading blocks 31 is fixed on through boss connecting pin 24 on the π shape support 23 that is equipped with through hole, and π shape support 23 is fixed on the L bracket 33 of symmetric arrangement by screw 32; Be fixed in screw 22 that symmetrically arranged L bracket 33 is equipped with through hole and is coated with connecting pin 21 on the spill horizontal seat 16 on top; The middle part of loading blocks 31 is parallel to test steel wire direction and is equipped with the through hole of middle straight line segment, two terminal circle segmental arc and is coated with screw 19, and screw 19 is fixed together loading blocks 31 and internal thread connecting link 15, and internal thread bar 15 belows are connected with radial tension-compression sensor 14; The top of trapezoidal slide block 29 is provided with L shaped link 17; The upper surface of L shaped link 17 is provided with the circular hole that passes test steel wire 9; Tail end is fixed with counterweight traction rope 20 through compressing tablet 18; Counterweight traction rope 20 pile warp connecting pins 21 connect the weight tray 13 that counterweight 12 is housed, and the middle part of spill horizontal seat 16 is provided with and the corresponding circular hole of L shaped link 17 circular holes.
Claims (2)
1. test unit of monitoring the steel wire fretting fatigue state; Comprise base (6), be symmetricly set on the support post (5) on the base (6); Support post (5) is provided with back timber (11); The middle part of base (6) is provided with the hydraulic elevator platform (7) that has displacement transducer; Back timber (11) is provided with tension-compression sensor (10), it is characterized in that: on described support post (5), be provided with horizontal charger, with horizontal charger relatively the tension-compression sensor (10) of top be provided with grip block (1); The lower surface of last grip block (1) is provided with acoustic emission device (2), with horizontal charger relatively the hydraulic elevator platform (7) of below be provided with down grip block (8); Described horizontal charger comprises outer fixture block (3) and the internal clamping block (4) that is set on the support post (5); The relative side of two internal clamping blocks (4) is respectively equipped with groove; Be provided with the spill horizontal seat (16) that can slide at two ends in the groove within it; Both sides are respectively equipped with guide type shoe (28) before and after in the spill horizontal seat (16), are provided with the trapezoidal slide block (29) that can slide in the guide type shoe (28) within it, are fixed with a left side on the end face of trapezoidal slide block (29) and load steel wire (27); Trapezoidal slide block (29) opposite face is interval with loading blocks (31); Loading blocks (31) is provided with a left side and loads the relative right side loading steel wire (26) of steel wire (27), and loading blocks (31) is fixed on the π shape support (23) through boss connecting pin (24), and π shape support (23) is fixed on symmetry and is located on the L bracket (33) on the spill horizontal seat (16); The top of symmetrically arranged L bracket (33) is coated with connecting pin (21); The middle part of loading blocks (31) is coated with internal thread connecting link (15), and internal thread connecting link (15) top is provided with the screw (19) that matches with it, and the below is provided with radial tension-compression sensor (14); The top of trapezoidal slide block (29) is provided with L shaped link (17); The upper surface of L shaped link (17) is provided with the circular hole that passes test steel wire (9); Tail end is fixed with counterweight traction rope (20); The weight tray (13) of counterweight (12) is equipped with in counterweight traction rope (20) pile warp connecting pin (21) connection, and the middle part of spill horizontal seat (16) is provided with and the corresponding circular hole of L shaped link (17) circular hole.
2. the test unit of monitoring steel wire fretting fatigue state according to claim 1 is characterized in that: the gap that described spill horizontal seat (16) moves in two internal clamping blocks (4) groove is 2～6cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202456487U CN202256052U (en) | 2011-07-13 | 2011-07-13 | Tester for monitoring fretting fatigue state of steel wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202456487U CN202256052U (en) | 2011-07-13 | 2011-07-13 | Tester for monitoring fretting fatigue state of steel wire |
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| Publication Number | Publication Date |
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| CN202256052U true CN202256052U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202456487U Expired - Lifetime CN202256052U (en) | 2011-07-13 | 2011-07-13 | Tester for monitoring fretting fatigue state of steel wire |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353590A (en) * | 2011-07-13 | 2012-02-15 | 中国矿业大学 | Test method and device for monitoring steel wire fretting fatigue state |
| CN103645105A (en) * | 2013-11-19 | 2014-03-19 | 河海大学 | Apparatus and testing method used for accurate testing of corrosion rate of steel bars along length directions |
| CN109975115A (en) * | 2018-11-21 | 2019-07-05 | 中国矿业大学 | Multifibres helical contact fatigue, abrasion and damage detection apparatus and detection method inside wirerope |
| CN110231234A (en) * | 2019-07-09 | 2019-09-13 | 中国科学院金属研究所 | Test the experimental provision of the two-way alternating bending of steel wire in high and low temperature environment |
| CN110231235A (en) * | 2019-07-09 | 2019-09-13 | 中国科学院金属研究所 | The experimental provision and experimental method of the two-way alternating bending of steel wire in a kind of test high and low temperature environment |
| CN111089794A (en) * | 2019-12-27 | 2020-05-01 | 浙江工业大学 | Simple manual fretting fatigue loading device |
| CN112433109A (en) * | 2020-10-08 | 2021-03-02 | 武汉理工大学 | Accompany tropical reliability test detection device under low temperature environment |
-
2011
- 2011-07-13 CN CN2011202456487U patent/CN202256052U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353590A (en) * | 2011-07-13 | 2012-02-15 | 中国矿业大学 | Test method and device for monitoring steel wire fretting fatigue state |
| CN102353590B (en) * | 2011-07-13 | 2012-11-28 | 中国矿业大学 | Test method and device for monitoring steel wire fretting fatigue state |
| CN103645105A (en) * | 2013-11-19 | 2014-03-19 | 河海大学 | Apparatus and testing method used for accurate testing of corrosion rate of steel bars along length directions |
| CN103645105B (en) * | 2013-11-19 | 2015-11-25 | 河海大学 | A kind of accurate test reinforcing bar is the device of corrosion ratio and method of testing along its length |
| CN109975115A (en) * | 2018-11-21 | 2019-07-05 | 中国矿业大学 | Multifibres helical contact fatigue, abrasion and damage detection apparatus and detection method inside wirerope |
| CN109975115B (en) * | 2018-11-21 | 2021-05-11 | 中国矿业大学 | Device and method for detecting multi-wire spiral contact inside steel wire rope |
| CN110231234A (en) * | 2019-07-09 | 2019-09-13 | 中国科学院金属研究所 | Test the experimental provision of the two-way alternating bending of steel wire in high and low temperature environment |
| CN110231235A (en) * | 2019-07-09 | 2019-09-13 | 中国科学院金属研究所 | The experimental provision and experimental method of the two-way alternating bending of steel wire in a kind of test high and low temperature environment |
| CN111089794A (en) * | 2019-12-27 | 2020-05-01 | 浙江工业大学 | Simple manual fretting fatigue loading device |
| CN112433109A (en) * | 2020-10-08 | 2021-03-02 | 武汉理工大学 | Accompany tropical reliability test detection device under low temperature environment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130306 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130306 |
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| RGAV | Abandon patent right to avoid regrant |