CN104359671A - Testing device for ball eye flexural vibration fatigue characteristic in power transmission line - Google Patents
Testing device for ball eye flexural vibration fatigue characteristic in power transmission line Download PDFInfo
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- CN104359671A CN104359671A CN201410757076.9A CN201410757076A CN104359671A CN 104359671 A CN104359671 A CN 104359671A CN 201410757076 A CN201410757076 A CN 201410757076A CN 104359671 A CN104359671 A CN 104359671A
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Abstract
The invention relates to a testing device for a ball eye flexural vibration fatigue characteristic in a power transmission line, belonging to the technical field of detection of power transmission line hardware, wherein a motor output shaft is linked with a bearing, and an eccentric shaft top block is arranged at the end part of the bearing. An upper air cylinder and a lower air cylinder are fixed on a device bracket, an upper sliding block and a lower sliding block are arranged at end parts of a mandril of the upper air cylinder and a mandril of the lower air cylinder, test sample colliding blocks are fixedly arranged on end faces of the upper sliding block and the lower sliding block, and a to-be-tested ball eye is arranged between the two test sample colliding blocks. The eccentric shaft top block at the end part of the bearing is arranged at one side of a test sample chuck. An oil cylinder is arranged at the other side of the test sample chuck, a piston of the oil cylinder is connected with a to-be-tested ball, and the end part of the ball of the to-be-tested ball eye is embedded in a groove of the test sample chuck. The testing device can be used for applying an impaction force and a tensioning force to the ball eye, and simulating a use tension of an actual line and use states under various complicated use conditions; various testing data of service life and fatigue resistance of the ball eye can be theoretically obtained within the shortest time.
Description
Technical field
The present invention relates to a kind of proving installation for ball-eye flexural vibrations fatigue properties in transmission line of electricity, belong to transmission line hardware detection technique field.
Background technology
Ball-eye is the crucial gold utensil in order to connecting insulator and shaft tower in overhead transmission line.In fact, wire can produce lasting vibration due to the reason such as wind speed, wind direction in the process hung.The various mechanicals efforts that conductor vibration produces can to the ball-eye formative dynamics load of connecting insulator and shaft tower.Ball-eye bears the irregular alternate load effect that conductor vibration produces for a long time, gold utensil can be caused tired, can rupture when serious.And ball-eye is positioned at the connecting portion of insulator and shaft tower, it is more hidden to there is fatigue breakdown in it, is difficult to find and eliminate in line inspection process.Meanwhile, ball-eye, once fracture, will cause wired earth fault for single insulator string, bring significant threat to overhead transmission line safe operation.Therefore it is necessary for carrying out flexural vibrations torture test to ball-eye.
At present in ball-eye torture test, conventional test unit is that eccentric wheel drives test unit.Its method and principle are fixedly mounted on specimen mounting by sample one end, the other end of sample coordinates with eccentric wheel, main axis is driven by drive unit, the eccentric wheel that main shaft is installed is also with main axis, eccentric wheel coordinates with sample, make sample alternating bending under the effect of alterante stress, repeated bend test is carried out to sample.
The shortcoming of the method is:
(1) this device is not for ball-eye design, only can the performance of test material itself, and can not apply tightening force to sample simultaneously, thus well can not simulate ball-eye actual motion condition, the experimental data obtained is inaccurate.
(2) this device is directly caused the applying of bending fatigue acting force by eccentric wheel and main axis, and not through control pressurer system, can not quantitatively set the acting force be applied on sample, measurement data is inaccurate.
Summary of the invention
The object of the invention is to propose a kind of proving installation for ball-eye flexural vibrations fatigue properties in transmission line of electricity, the service condition of simulation ball-eye, by certain strength and frequency, impulse test is carried out to ball-eye, thus draw the science data of ball-eye life-span and antifatigue.
The proving installation for ball-eye flexural vibrations fatigue properties in transmission line of electricity that the present invention proposes, comprises motor, bearing, excentric shaft jacking block, upper eccentric collision block, lower eccentric collision block, guide rail, upper cylinder, lower cylinder, upper cylinder push rod, lower cylinder rams, top shoe, sliding block, upper sample collision block, lower sample collision block, sample chuck, console panel, steel wire, steel wire connecting plate and oil cylinder; Described console panel is connected with the input shaft of motor, and the output shaft of motor is connected by V-belt and bearing, and bearing is placed in bearing seat, and bearing seat is placed on bearing bracket, and bearing end is provided with excentric shaft jacking block; Described upper cylinder and described lower cylinder are fixed on appliance stand, and the casing top half push rod of casing top half and the lower cylinder rams end of lower cylinder are respectively equipped with top shoe and sliding block, and described guide rail is placed in top shoe, between sliding block and support respectively; The lower surface of top shoe and the upper surface of sliding block are fixed with sample collision block and lower sample collision block respectively, and described ball-eye to be measured is placed between sample collision block and lower sample collision block; The excentric shaft jacking block of described bearing end is positioned at the side of sample chuck, and described upper eccentric collision block and lower eccentric collision block are separately fixed on top shoe lower surface and sliding block upper surface, and are positioned at the upper and lower of excentric shaft jacking block; Described oil cylinder is placed in the opposite side of sample chuck, and oil cylinder piston is connected by pin with the end of steel wire with ball-eye to be measured by steel wire yoke plate, and the bulb end of ball-eye to be measured embeds in the groove of sample chuck.
The proving installation for ball-eye flexural vibrations fatigue properties in transmission line of electricity that the present invention proposes, its advantage is:
(1) proving installation of flexural vibrations fatigue properties of the present invention, impulsive force, tightening force can be applied to ball-eye simultaneously, using state under the simulation use tension force of actual track and various complicated service condition, can obtain the life-span of ball-eye and the various test figures of antifatigue from point of theory within the shortest time.
(2) proving installation of the present invention, the impulsive force exported during test is changed by air pressure, can quantitatively set, and the flexural vibrations fatigue properties of therefore testing the ball-eye obtained are accurate and stable.
(3) proving installation of the present invention, can by programmable logic device (PLD) control system, in conjunction with hydraulic pressure, pneumatic, mechanical, the full Based Intelligent Control of electrical equipment, data setting is simplified, frequency, impulsive force, tightening force arbitrarily set, test parameters variation, make measurement result more accurately and reliably, work efficiency is high.
Accompanying drawing explanation
Fig. 1 is the structural representation for the proving installation of ball-eye flexural vibrations fatigue properties in transmission line of electricity that the present invention proposes.
Fig. 2 is the A direction view of Fig. 1.
In Fig. 1 and Fig. 2,1 be motor, 2 are V-belts, 3 are bearings, 4 are appliance stands, 5 are bearing brackets, 6 are bearing seats, 7 is excentric shaft jacking blocks, and 8 are upper eccentric collision blocks, 9 are lower eccentric collision blocks, 10 are upper cylinders, 11 are lower cylinders, 12 are upper cylinder push rods, 13 are lower cylinder rams, 14 are sliding blocks, 15 are top shoes, 16 are lower sample collision blocks, 17 are upper sample collision blocks, 18 are sample chucks, 19 are ball-eyes to be measured, 20 are console panels, 21 are guide rails, 22 are pins, 23 are steel wires, 24 are steel wire connecting plates, 25 are oil cylinder pistons, 26 is oil cylinders.
Embodiment
The proving installation for ball-eye flexural vibrations fatigue properties in transmission line of electricity that the present invention proposes, its structure as shown in Figure 1, comprising: motor 1, bearing 3, excentric shaft jacking block 7, upper eccentric collision block 8, lower eccentric collision block 9, guide rail 21, upper cylinder 10, lower cylinder 11, upper cylinder push rod 12, lower cylinder rams 13, top shoe 15, sliding block 14, upper sample collision block 17, lower sample collision block 16, sample chuck 18, console panel 20, steel wire 23, steel wire connecting plate 24 and oil cylinder 26; Described console panel 20 is connected with the input shaft of motor 1, and the output shaft of motor is connected by V-belt 2 and bearing 3, and bearing 3 is placed in bearing seat 6, and bearing seat 6 is placed on bearing bracket 5, and bearing end is provided with excentric shaft jacking block 7.Upper cylinder 10 and lower cylinder 11 are fixed on appliance stand 4, the casing top half push rod 12 of casing top half 10 and lower cylinder rams 13 end of lower cylinder 11 are respectively equipped with top shoe 15 and sliding block 14, and described guide rail 21 is placed in top shoe 15, between sliding block 14 and appliance stand 4 respectively; The lower surface of top shoe 15 and the upper surface of sliding block 14 are fixed with sample collision block 17 and lower sample collision block 16 respectively, and described ball-eye to be measured 19 is placed between sample collision block 17 and lower sample collision block 16.The excentric shaft jacking block 7 of bearing 3 end is positioned at the side of sample chuck 18, and described upper eccentric collision block 17 and lower eccentric collision block 16 are separately fixed on top shoe 15 lower surface and sliding block 14 upper surface, and are positioned at the upper and lower of excentric shaft jacking block 7.Oil cylinder 26 is placed in the opposite side of sample chuck 18, and oil cylinder piston 25 is connected by pin 22 with the end of ball-eye 19 to be measured with steel wire 23 by steel wire yoke plate 24, and the bulb end of ball-eye 19 to be measured embeds in the groove of sample chuck 18.
The course of work of this proving installation is introduced in detail below in conjunction with accompanying drawing:
The proving installation for ball-eye flexural vibrations fatigue properties in transmission line of electricity that the present invention proposes, during use, first the bulb end of ball-eye 19 to be measured is embedded in the groove of sample chuck 18, the link end of ball-eye 19 to be measured is connected with steel wire 23 by pin 22, steel wire 23 is connected with the piston 25 of oil cylinder 26 by steel wire yoke plate 24, certain pulling force is applied to ball-eye 19 to be measured, the size of pulling force is set by console panel 20, the size of console panel 20 by regulating the pressure of oil cylinder 26 to control the pulling force be applied on ball-eye 19 to be measured.The flexural vibrations power be applied on ball-eye 19 to be measured is set, the size of console panel 20 by regulating the pressure of upper cylinder 10 and lower cylinder 11 to control the flexural vibrations power be applied on ball-eye 19 to be measured by console panel 20.The frequency of the flexural vibrations power on ball-eye 19 to be measured is applied to, the frequency of console panel 20 by regulating the output speed of motor 1 to control the flexural vibrations power be applied on ball-eye 19 to be measured by console panel 20 setting.Appliance stand 4, bearing bracket 5, bearing seat 6 jointly play support, stablize the effect of apparatus of the present invention.
On-test, the enabling signal that console panel 20 pairs of motors 1 send, the output shaft of motor 1 is connected by V-belt 2 and bearing 3, and band dynamic bearing 3 rotates.The end excentric shaft jacking block 7 of bearing 3 rotates with bearing 3, stirs eccentric collision block 8 and lower eccentric collision block 9, and upper eccentric collision block 8 and lower eccentric collision block 9 are separately fixed on top shoe 15 lower surface and sliding block 14 upper surface.When excentric shaft jacking block 7 stirs upper eccentric collision block 8, top shoe 15 moves upward along guide rail 21, excentric shaft jacking block 7 continues to rotate with bearing 3, lose and power is stirred to upper eccentric collision block 8, under the effect of upper cylinder 10 pressure, casing top half push rod 12 promotes top shoe 15 and moves downward along guide rail 21, and the upper sample collision block 17 on top shoe 15 clashes into ball-eye 19 to be measured and applies downward flexural vibrations power.When excentric shaft jacking block 7 stirs lower eccentric collision block 9, top shoe 14 moves downward along guide rail 21, excentric shaft jacking block 7 continues to rotate with bearing 3, lose and power is stirred to lower eccentric collision block 9, under the effect of lower cylinder 11 pressure, lower cylinder rams 13 promotes sliding block 14 along guide rail 21 and moves upward, and the lower sample collision block 16 on sliding block 14 clashes into the flexural vibrations power that ball-eye 19 to be measured applies upwards.Move in circles, under certain flexural vibrations impulsive force, certain pulling force effect are carried out to ball-eye 19 to be measured, the flexural vibrations torture test of certain frequency.
Claims (1)
1., for a proving installation for ball-eye flexural vibrations fatigue properties in transmission line of electricity, it is characterized in that this proving installation comprises motor, bearing, excentric shaft jacking block, upper eccentric collision block, lower eccentric collision block, guide rail, upper cylinder, lower cylinder, upper cylinder push rod, lower cylinder rams, top shoe, sliding block, upper sample collision block, lower sample collision block, sample chuck, console panel, steel wire, steel wire connecting plate and oil cylinder; Described console panel is connected with the input shaft of motor, and the output shaft of motor is connected by V-belt and bearing, and bearing is placed in bearing seat, and bearing seat is placed on bearing bracket, and bearing end is provided with excentric shaft jacking block; Described upper cylinder and described lower cylinder are fixed on appliance stand, and the casing top half push rod of casing top half and the lower cylinder rams end of lower cylinder are respectively equipped with top shoe and sliding block, and described guide rail is placed in top shoe, between sliding block and support respectively; The lower surface of top shoe and the upper surface of sliding block are fixed with sample collision block and lower sample collision block respectively, and described ball-eye to be measured is placed between sample collision block and lower sample collision block; The excentric shaft jacking block of described bearing end is positioned at the side of sample chuck, and described upper eccentric collision block and lower eccentric collision block are separately fixed on top shoe lower surface and sliding block upper surface, and are positioned at the upper and lower of excentric shaft jacking block; Described oil cylinder is placed in the opposite side of sample chuck, and oil cylinder piston is connected by pin with the end of steel wire with ball-eye to be measured by steel wire yoke plate, and the bulb end of ball-eye to be measured embeds in the groove of sample chuck.
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| CN201410757076.9A CN104359671B (en) | 2014-12-10 | 2014-12-10 | Testing device for ball eye flexural vibration fatigue characteristic in power transmission line |
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| CN201410757076.9A CN104359671B (en) | 2014-12-10 | 2014-12-10 | Testing device for ball eye flexural vibration fatigue characteristic in power transmission line |
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| CN104359671A true CN104359671A (en) | 2015-02-18 |
| CN104359671B CN104359671B (en) | 2017-01-11 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105527180A (en) * | 2015-11-30 | 2016-04-27 | 中国航空工业集团公司沈阳飞机设计研究所 | Testing method for bending fatigue of metal material |
| CN106501075A (en) * | 2016-10-20 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | A kind of electric armour clamp wear test fixture and electric armour clamp abrasion tester |
| CN108760204A (en) * | 2018-06-13 | 2018-11-06 | 国网新疆电力有限公司电力科学研究院 | For conducting wire and its wind-induced fatigue experimental rig of connection gold utensil |
| CN109374249A (en) * | 2018-11-08 | 2019-02-22 | 国网浙江省电力有限公司电力科学研究院 | Analog conducting wire carries out the wire clamp test platform of arbitrary curve swing under wind excitation |
| CN109406083A (en) * | 2018-11-08 | 2019-03-01 | 国网新疆电力有限公司电力科学研究院 | A kind of overhanging golden tool string wind excited vibration Wearing Simulated Test platform |
| CN113565833A (en) * | 2021-09-27 | 2021-10-29 | 莱州兴达液压机械科技有限公司 | Oil cylinder fatigue test machine |
| CN113758664A (en) * | 2021-08-10 | 2021-12-07 | 广州大学 | Rope-tied artificial excitation control system and control method thereof |
| CN114166667A (en) * | 2021-11-19 | 2022-03-11 | 广东石油化工学院 | Multidirectional physical impact test equipment for testing fatigue of metal material |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527180A (en) * | 2015-11-30 | 2016-04-27 | 中国航空工业集团公司沈阳飞机设计研究所 | Testing method for bending fatigue of metal material |
| CN105527180B (en) * | 2015-11-30 | 2019-03-08 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of metal material bending fatigue testing method |
| CN106501075B (en) * | 2016-10-20 | 2018-11-20 | 云南电网有限责任公司电力科学研究院 | A kind of electric armour clamp wear test fixture and electric armour clamp abrasion tester |
| CN106501075A (en) * | 2016-10-20 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | A kind of electric armour clamp wear test fixture and electric armour clamp abrasion tester |
| CN108760204A (en) * | 2018-06-13 | 2018-11-06 | 国网新疆电力有限公司电力科学研究院 | For conducting wire and its wind-induced fatigue experimental rig of connection gold utensil |
| CN109374249A (en) * | 2018-11-08 | 2019-02-22 | 国网浙江省电力有限公司电力科学研究院 | Analog conducting wire carries out the wire clamp test platform of arbitrary curve swing under wind excitation |
| CN109406083A (en) * | 2018-11-08 | 2019-03-01 | 国网新疆电力有限公司电力科学研究院 | A kind of overhanging golden tool string wind excited vibration Wearing Simulated Test platform |
| CN109406083B (en) * | 2018-11-08 | 2023-12-05 | 国网新疆电力有限公司电力科学研究院 | Suspension string hardware wind excitation vibration abrasion simulation test platform |
| CN109374249B (en) * | 2018-11-08 | 2023-12-26 | 国网浙江省电力有限公司电力科学研究院 | Wire clamp test platform for simulating random curve swing of wire under wind excitation |
| CN113758664A (en) * | 2021-08-10 | 2021-12-07 | 广州大学 | Rope-tied artificial excitation control system and control method thereof |
| CN113758664B (en) * | 2021-08-10 | 2023-10-31 | 广州大学 | Rope-tied type manual excitation control system and control method thereof |
| CN113565833A (en) * | 2021-09-27 | 2021-10-29 | 莱州兴达液压机械科技有限公司 | Oil cylinder fatigue test machine |
| CN113565833B (en) * | 2021-09-27 | 2022-01-04 | 莱州兴达液压机械科技有限公司 | Oil cylinder fatigue test machine |
| CN114166667A (en) * | 2021-11-19 | 2022-03-11 | 广东石油化工学院 | Multidirectional physical impact test equipment for testing fatigue of metal material |
| CN114166667B (en) * | 2021-11-19 | 2023-09-29 | 广东石油化工学院 | Multidirectional physical impact test equipment for testing fatigue degree of metal material |
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