NL2030593B1 - Fatigue test device for elastic sling - Google Patents

Fatigue test device for elastic sling Download PDF

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Publication number
NL2030593B1
NL2030593B1 NL2030593A NL2030593A NL2030593B1 NL 2030593 B1 NL2030593 B1 NL 2030593B1 NL 2030593 A NL2030593 A NL 2030593A NL 2030593 A NL2030593 A NL 2030593A NL 2030593 B1 NL2030593 B1 NL 2030593B1
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Netherlands
Prior art keywords
mounting arm
elastic sling
elastic
linear drive
horizontal tension
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NL2030593A
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Dutch (nl)
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NL2030593A (en
Inventor
Chen Jiao
Wu Jiqin
Chen Weirong
Liang Ru'nan
Han Feng
Cheng Junying
Liu Jidong
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Univ Southwest Jiaotong
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Priority to NL2030593A priority Critical patent/NL2030593B1/en
Publication of NL2030593A publication Critical patent/NL2030593A/en
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Publication of NL2030593B1 publication Critical patent/NL2030593B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
    • B60M1/22—Separate lines from which power lines are suspended, e.g. catenary lines, supporting-lines under tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/28—Manufacturing or repairing trolley lines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0025—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of elongated objects, e.g. pipes, masts, towers or railways
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0033—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining damage, crack or wear
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0005—Repeated or cyclic
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/022—Environment of the test
    • G01N2203/0244—Tests performed "in situ" or after "in situ" use
    • G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0278—Thin specimens
    • G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a fatigue test device for an elastic sling, and relates to the technical field of overhead lines of electric railways. The device includes a first mounting assembly 5 including a first mounting arm, a first wire clip arranged on the first mounting arm, and a first linear drive device connected with the first mounting arm to drive the first mounting arm to do reciprocating motion along a vertical direction, one end of the elastic sling being clamped on the first wire clip, a second mounting assembly including a second mounting arm and a second wire clip arranged on the second mounting arm, the other end of the 10 elastic sling being clamped on the second mounting arm, and a controller in communication connection with the first linear drive device. The controller controls the first linear drive device to move to complete a fatigue test on the sling.

Description

FATIGUE TEST DEVICE FOR ELASTIC SLING
TECHNICAL FIELD
[01] The present invention relates to the technical field of overhead lines of electric railways, in particular to a fatigue test device and method for an elastic sling.
BACKGROUND ART
[02] An overhead line is an important part of an electric railway. A pantograph on an electric locomotive directly contacts the overhead line to obtain a current and provide power required for train operation. An elastic sling is a key component of an elastic chain suspension overhead line, which is used to increase the elasticity of a locating point and reduce the non-uniformity of the elasticity of the overhead line, so that the pantograph can obtain smooth and continuous current under high-speed operation conditions.
[03] There is no report on a fatigue test device and method for an elastic sling in the test standard of overhead line parts of electric railways in China and the related research literature of the overhead line parts. Therefore, how to provide a fatigue test device for an elastic sling has become an urgent problem to be solved by those skilled in the art.
SUMMARY
[04] In order to solve the above technical problem, the present invention provides a fatigue test device for an elastic sling, so as to carry out a corresponding fatigue life test for a service state of the elastic sling, thus predicting the service life of the elastic sling in a corresponding service environment.
[05] To achieve the above-mentioned purpose, the present invention provides the following solution:
[06] The present invention provides a fatigue test device for an elastic sling, including a first mounting assembly, the first mounting assembly including a first mounting arm, a first wire clip, and a first linear drive device, the first wire clip being arranged on the first mounting arm, the first linear drive device being connected with the first mounting arm to drive the first mounting arm to do reciprocating motion along a vertical direction, and one end of the elastic sling being clamped on the first wire clip; a second mounting assembly, the second mounting assembly including a second mounting arm and a second wire clip, the second wire clip being arranged on the second mounting arm, and the other end of the elastic sling being clamped on the second mounting arm; and a controller, the first linear drive device being in communication connection with the controller.
[07] Preferably, the fatigue test device for the elastic sling further includes a horizontal tension loading device; the horizontal tension loading device is used to apply a horizontal tension to the elastic sling; and the horizontal tension loading device is in communication connection with the controller.
[08] Preferably, the second mounting arm is a fixed bracket; and the horizontal tension loading device is arranged on the fixed bracket.
[09] Preferably, the fatigue test device for the elastic sling further includes a first force detection device, a second force detection device, and a display; the first force detection device is used to detect a first loading force applied by the first mounting arm to the elastic sling; the second force detection device is used to detect a magnitude of the horizontal tension applied by the horizontal tension loading device to the elastic sling; and the first force detection device, the second force detection device, and the display are all in communication connection with the controller.
[10] Compared with the existing art, the following technical effects are achieved in the present invention.
[11] The fatigue test device for the elastic sling provided by the present invention includes a first mounting assembly, the first mounting assembly including a first mounting arm, a first wire clip, and a first linear drive device, the first wire clip being arranged on the first mounting arm, the first linear drive device being connected with the first mounting arm to drive the first mounting arm to do reciprocating motion along a vertical direction, and one end of the elastic sling being clamped on the first wire clip; a second mounting assembly, the second mounting assembly including a second mounting arm and a second wire clip, the second wire clip being arranged on the second mounting arm, and the other end of the elastic sling being clamped on the second mounting arm; and a controller, the first linear drive device being in communication connection with the controller.
[12] A fatigue test method for an elastic sling which uses the fatigue test device for an elastic sling to perform a fatigue test on an elastic sling of an overhead line of a high-speed railway includes the following steps: acquiring vibration displacement and time data of a first position of the elastic sling; setting a horizontal tension of the elastic sling; converting the vibration displacement and time data into a control code of a motion displacement and frequency of the first linear drive device; and controlling, by the controller through the control code, the first linear drive device to work. The fatigue test device for the elastic sling can carry out a corresponding fatigue life test for a service state of the elastic sling, thus predicting the service life of the elastic sling in a corresponding service environment.
BRIEF DESCRIPTION OF THE DRAWINGS
[13] FIG. 1 is a schematic structural diagram of a fatigue test device for an elastic sling provided in an embodiment of the present invention.
[14] Reference signs in the drawings, 100: fatigue test device for an elastic sling; 1: first mounting arm; 2: first wire clip; 3: first linear drive device; 4: second mounting arm; 5: second wire clip; 6: controller; 7: horizontal tension loading device; 8: first force detection device; 9: second force detection device; 10: display; 11: third mounting arm; 12: third linear drive device; 13: first pulley; 14: second pulley; 15: third force detection device; 16: data wire; and 17: elastic sling.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[15] The present invention aims to provide a fatigue test device for an elastic sling.
[16] In order to make the above-mentioned purposes, characteristics and advantages of the present invention more obvious and understandable, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation modes.
[17] Embodiment I:
[18] As shown in FIG. 1, this embodiment provides a fatigue test device 100 for an elastic sling, including a first mounting assembly, the first mounting assembly including a first mounting arm 1, a first wire clip 2, and a first linear drive device 3, the first wire clip 2 being arranged on the first mounting arm 1, the first linear drive device 3 being connected with the first mounting arm 1 to drive the first mounting arm 1 to do reciprocating motion along a vertical direction, and one end of the elastic sling 17 being clamped on the first wire clip 2; a second mounting assembly, the second mounting assembly including a second mounting arm 4 and a second wire clip 5, the second wire clip 5 being arranged on the second mounting arm 4, and the other end of the elastic sling 17 being clamped on the second mounting arm 4; and a controller 6, the first linear drive device 3 being in communication connection with the controller 6. The fatigue test device 100 for an elastic sling can carry out a corresponding fatigue life test for a service state of the elastic sling 17, thus predicting the service life of the elastic sling 17 in a corresponding service environment.
[19] In this embodiment, the fatigue test device 100 for an elastic sling further includes a horizontal tension loading device 7; the horizontal tension loading device 7 is used to apply a horizontal tension to the elastic sling 17; and the horizontal tension loading device 7 is in communication connection with the controller 6. The specific structure of the horizontal tension loading device 7 belongs to the existing art. For example, a servo hydraulic press is used.
[20] Further, the second mounting arm 4 is a fixed bracket, and the horizontal tension loading device 7 is arranged on the fixed bracket.
[21] Further, the horizontal tension loading device 7 is connected with an end of the elastic sling 17 close to the second mounting arm 4. In a specific use process, the first wire clip 2 firstly clamps one end of the elastic sling 17, and then a horizontal force is applied to the other end of the elastic sling 17 through the horizontal tension loading device 7. When the elastic sling 17 reaches a desired horizontal tension, the horizontal tension loading device 7 stops applying a force; and at the same time, the second wire clip 5 clamps the other end of the elastic sling 17.
[22] In this embodiment, in order to facilitate monitoring the whole test process, the fatigue test device 100 for an elastic sling further includes a first force detection device 8, a second force detection device 9, and a display 10. The first force detection device 8 is used to detect a first loading force applied by the first mounting arm 1 to the elastic sling 17; the 5 second force detection device 9 is used to detect a magnitude of the horizontal tension applied by the horizontal tension loading device 7 to the elastic sling 17; and the first force detection device 8, the second force detection device 9, and the display 10 are all in communication connection with the controller 6. In the whole test process, the horizontal tension on the elastic sling 17 shall be kept constant.
[23] Specifically, the first force detection device 8 and the second force detection device 9 are both force sensors; the first mounting arm 1, the first force detection device 8, and the first linear drive device 3 are connected in sequence; and one end of the elastic sling 17 close to the second mounting arm 4, the second force detection device 9, and the horizontal tension loading device 7. The first linear drive device 3 and the second linear drive device are both linear motors. The first force detection device 8, the second force detection device 9, the display 10, the first linear drive device 3, the second linear drive device, and the horizontal tension loading device 7 are all in communication connection with the controller 6 through data wires 16.
[24] In this embodiment, the fatigue test device 100 for an elastic sling further includes at least one third mounting assembly; the at least one third mounting assembly is arranged between the first mounting assembly and the second mounting assembly, and the at least one third mounting assembly 1s disposed along a lengthwise direction of the elastic sling 17; each third mounting assembly includes a third mounting arm 11 and a third linear drive device 12; the third linear drive device 12 is connected with the third mounting arm 11 to drive the third mounting arm 11 to do reciprocating motion along the vertical direction; the elastic sling 17 passes through each third mounting arm 11; and each third linear drive device 12 is in communication connection with the controller 6. It should be noted that the number of the third mounting assembly may be one or more. It is set according to the corresponding service environment of the elastic sling 17.
[25] Further, in order to reduce friction between an elastic mounting arm and the elastic sling 17, the third mounting assembly further includes a first pulley 13 and a second pulley 14; the first pulley 13 and the second pulley 14 are disposed on the third mounting arm 11 along the vertical direction in a manner that they are opposite to each other up and down; a gap for allowing the elastic sling 17 to pass is reserved between the first pulley 13 and the second pulley 14; and the elastic sling 17 sequentially passes through each gap to realize that the elastic sling 17 sequentially passes through each third mounting arm 11.
[26] In this embodiment, the third mounting assembly further includes a third force detection device 15. The third force detection device 15 is used to detect a second loading force applied by the third mounting arm 11 to the elastic sling 17. Specifically,
[27] The fatigue test device 100 for an elastic sling is used to perform a fatigue test on the elastic sling 17 of an overhead line of a high-speed railway, including the following steps. Vibration displacement and time data of a first position of the elastic sling 17 is acquired.
[28] A horizontal tension of the elastic sling 17 is set, and a distance between the first mounting arm 1 and the second mounting arm 4 is designed as required. The vibration displacement and time data is converted into a control code of a motion displacement and frequency of the first linear drive device 3. The controller 6 controls, through the control code, the first linear drive device 3 to work.
[29] Specifically, the vibration displacement and time data of the first position of the elastic sling 17 is acquired through simulation calculation or site measurement; the vibration displacement and time data is converted into the control code of the motion displacements and frequencies of the first linear drive device 3 and the second linear drive device; the controller 6 controls, through the control code, the first linear drive device 3 and the second linear drive device to work, so as to apply transverse vibration displacement stimulation to the elastic sling 17 and simulate a vibration load of the elastic sling 17 in the service state, and the number of times of loading of the load is recorded and displayed in real time on the display 10; and the test is carried out all the time till the test is manually stopped or till the elastic sling 17 is broken. After the test is interrupted, the test is continued to be started, and the number of times of loading of the load is accumulated till the elastic sling 17 is broken. The number of times of loading of a set test load of the elastic sling 17 is the fatigue life of the elastic sling 17 under the test load.
[30] It should be noted that the first position is selected according to an actual need.
The horizontal tension of the elastic sling 17 is also selected according to an actual need.
[31] Embodiment II
[32] This embodiment includes all the technical features of Embodiment I, and a difference is that in Embodiment I, the second mounting arm 4 is a fixed bracket, and is stationary. In this embodiment, the second mounting assembly further includes a second linear drive device. The second linear drive device is connected with the second mounting arm 4 to drive the second mounting arm 4 to do reciprocating motion along the vertical direction, and the second linear drive device is in communication connection with the controller 6.
[33] In the specific use process of the fatigue test device 100 for an elastic sling provided by this embodiment, the vibration displacement and time data is converted into a control code of motion displacements and frequencies of the first linear drive device 3, the second linear drive device, and the third linear drive device 12, and the controller 6 controls, through the control code, the first linear drive device 3, the second linear drive device, and the third linear drive device 12 to work, so as to apply transverse vibration displacement stimulation to the elastic sling 17 and simulate a vibration load of the elastic sling 17 in a service state.

Claims (4)

Conclusies l. Moeheidstestinrichting voor een elastische draagband, die gekenmerkt is doordat het het volgende omvat: een eerste montagesamenstel, waarbij het eerste montagesamenstel een eerste montagearm, een eerste draadklem en een eerste lineaireaandrijfinrichting omvat, waarbij de eerste draadklem ingericht is op de eerste montagearm, waarbij de eerste lineaireaandrijfinrichting verbonden is met de eerste montagearm om de eerste montagearm een heen en weer gaande beweging langs een verticale richting te laten maken, en waarbij één einde van de elastische draagband geklemd is op de eerste draadklem; een tweede montagesamenstel, waarbij het tweede montagesamenstel een tweede montagearm en een tweede draadklem omvat, waarbij de tweede draadklem ingericht is op de tweede montagearm, en waarbij het andere einde van de elastische draagband geklemd is op de tweede montagearm; en een regelaar, waarbij de eerste lineaireaandrijfinrichting in communicatieve verbinding is met de regelaar.Conclusions l. Fatigue testing apparatus for an elastic stringer, characterized in that it comprises: a first mounting assembly, the first mounting assembly comprising a first mounting arm, a first wire clamp, and a first linear drive device, the first wire clamp being arranged on the first mounting arm, the first mounting arm linear drive device is connected to the first mounting arm to cause the first mounting arm to reciprocate along a vertical direction, and one end of the elastic stringer strap is clamped to the first wire clip; a second mounting assembly, the second mounting assembly comprising a second mounting arm and a second wire clip, the second wire clip being disposed on the second mounting arm, and the other end of the elastic stringer being clamped on the second mounting arm; and a controller, wherein the first linear drive device is in communicative connection with the controller. 2. moeheidstestinrichting voor de elastische draagband volgens conclusie 1, met het kenmerk, dat het verder een horizontalespankrachtbelastingsinrichting omvat, waarbij de horizontalespankrachtbelastingsinrichting gebruikt wordt om een horizontale spankracht aan te brengen op de elastische draagband; en waarbij de horizontale spankrachtbelastingsinrichting in communicatieve verbinding is met de regelaar.The fatigue testing apparatus for the elastic stringer according to claim 1, characterized in that it further comprises a horizontal tension force loading device, the horizontal tension force loading device being used to apply a horizontal tension force to the elastic stringer; and wherein the horizontal tension loader is in communicative communication with the controller. 3. moeheidstestinrichting voor de elastische draagband volgens conclusie 2, met het kenmerk, dat de tweede montagearm een vaste steun is, en waarbij de horizontalespankrachtbelastingsinrichting ingericht is op de vaste steun.The fatigue testing device for the elastic stringer according to claim 2, characterized in that the second mounting arm is a fixed support, and wherein the horizontal tension force loading device is arranged on the fixed support. 4. moeheidstestinrichting voor de elastische draagband volgens conclusie 2, met het kenmerk, dat het verder een eerste krachtdetectie-inrichting, een tweede krachtdetectie-inrichting en een beeldscherm omvat, waarbij de eerste krachtdetectie- inrichting gebruikt wordt om een eerste belastingskracht te detecteren die aangebracht is door de eerste montagearm op de elastische draagband; waarbij de tweede krachtdetectie-inrichting gebruikt wordt om een grootte van de horizontale spankracht te detecteren die aangebracht 1s door de horizontalespankrachtbelastingsinrichting op de elastische draagband; en waarbij de eerste krachtdetectie-inrichting, de tweede krachtdetectie-inrichting en het beeldscherm allemaal in communicatieve verbinding zijn met de regelaar.The fatigue testing apparatus for the elastic stringer according to claim 2, characterized in that it further comprises a first force detecting device, a second force detecting device and a display, the first force detecting device being used to detect a first load force applied is through the first mounting arm on the elastic stringer; wherein the second force detecting device is used to detect a magnitude of the horizontal tension force applied by the horizontal tension force loading device to the elastic stringer; and wherein the first force detecting device, the second force detecting device and the display are all in communicative connection with the controller.
NL2030593A 2022-01-18 2022-01-18 Fatigue test device for elastic sling NL2030593B1 (en)

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KR20150014588A (en) * 2013-07-30 2015-02-09 한국철도기술연구원 Apparatus for testing vibration fatigue life of electric railway dropper
CN105823696A (en) * 2016-05-26 2016-08-03 中国矿业大学 Ultra-deep vertical shaft winding type hoisting steel cable multi-axial friction fatigue damage monitoring device and method
CN112504884A (en) * 2020-12-03 2021-03-16 鲁普耐特集团有限公司 Fiber rope high-low temperature fatigue performance testing device

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