CN109596330A - A kind of multichannel high iron catenary dropper fatigue experimental device - Google Patents
A kind of multichannel high iron catenary dropper fatigue experimental device Download PDFInfo
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- CN109596330A CN109596330A CN201811543356.4A CN201811543356A CN109596330A CN 109596330 A CN109596330 A CN 109596330A CN 201811543356 A CN201811543356 A CN 201811543356A CN 109596330 A CN109596330 A CN 109596330A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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Abstract
The present invention relates to a kind of multichannel high iron catenary dropper fatigue experimental devices.The device is applied to the dropper fatigue test in high iron catenary system.The device includes upper beam (1), support rod (2), upper end clamping device (3), dropper (4), lower end clamping device (5), workbench (6), pedestal (7) and testing machine monitoring system.The present invention has the function that simultaneously more droppers are carried out with fatigue test according to national standard, by high speed electric cylinders to the power of dropper and the load of displacement, it simulates different speeds and crosses dropper working condition under operating condition, complete its fatigue test, foundation is provided for prediction dropper fatigue life, meets the needs that railroad formulates associated fatigue standard.
Description
Technical field
The invention belongs to high iron catenary technical field, it is related to a kind of Contact Net's Suspension Chord fatigue test method and device.
Background technique
Contact net, as the route directly powered to electric locomotive, when high-speed rail is run, pantograph at the top of locomotive with contact
Line is contacted, to obtain the power continually and steadily run.Contact net is the key components of high-speed electric railway, directly
Connect the safe and stable operation for influencing electric railway.
Contact net generally comprises such as contact line, carrier cable, dropper, elastic suspending, bracket, pillar component.Wherein, dropper
As the connector between contact line, carrier cable, vibration and the transmitting of power effect between the two are assumed responsibility for, is the key that zero, contact net
One of part.During runing at the scene, once being broken, local contact net can collapse, Qing Zhehui dropper due to losing support
Bow net dynamic current carrying quality is influenced, rapidly shortens contact net service life, contact net can be pulled bad when serious or breaks pantograph, from
And leading to train fault, the life security of safe operation and passenger to train causes very bad influence.
With the increase of the cumulative number of High Speed Railway road EMU shelf time, the defects count of dropper year by year on
It rises.Since the sum of dropper is larger, and in actual motion maintenance engineering, it has been not enough to disappear completely by conventional maintenance strength
Except the security risk and defect, and the workload overhauled is very big.Some stranded defects are not easy to check and eliminate, and may exist
Security risk, this hidden danger easily cause motor-car pantograph impaired, cause accident between pantograph, jeopardize motor-car safe operation.Therefore, right
Dropper carries out the fatigue test under different operating conditions, predicts its service life, formulate relevant criterion, be very it is necessary to.
Country has formulated corresponding examination criteria for dropper, and specific requirement is as follows:
(1) press cycles are half of sine wave, and power is constant force inside dropper；
(2) dropper should be tested with its specific wire clamp；
(3) it should be tested by the minimum requirements of normal use；
(4) answering specified compression amplitude in 20mm --- between 200mm, power is 100N-400N inside dropper；
(5) frequency should be 0.5Hz-10Hz, and minimum should carry out 2000000 tests.
For dropper fatigue test standard, some fatigue experimental devices, but existing dropper fatigue test side are devised at present
Case is primarily present following deficiency: (1) a kind of Contact Net's Suspension Chord fatigue experimental device of utility model patent
(CN201721426702.1), a kind of Contact Net's Suspension Chord fatigue test method of patent of invention and device
(CN201711043723.X), utility model patent dropper fatigue tester (CN201720777240.1), patent of invention dropper
Fatigue tester (CN201710511861.X) and patent of invention dropper vibration fatigue machine
(CN201810139844.2) using counterweight/weight of constant weight to dropper applied force, hang counterweight drive by gravity
String does the movement of falling object down.There are two drawbacks for this method, one is in actual mechanical process, when progress high frequency test
When, the peak acceleration that weight/counterweight moves downward is only acceleration of gravity, and weight tray acceleration of motion will be much larger than weight
Power acceleration, patent CN201720777240.1 and CN201710511861.X counterweight/weight can be separated with pallet, and test can not
It completes；The second is the fatigue rupture of dropper is patent as the impact force of counterweight and caused by non-gravity in fact in the program
Power is carried out using weight freely falling body in CN201721426702.1, CN201711043723.X and CN201810139844.2
Load, in actual work, freely falling body of weight will lead to dropper and repeatedly shakes testing machine, can not be in simulating actual conditions
Effect of the contact line to dropper can not accurately detect the dropper service life；(2) patent CN201721426702.1,
CN201711043723.X, CN201720777240.1 and CN201710511861.X are buffered using spring spring, for
Million even thousands of times fatigue test for, the service life of spring does not often reach requirement, and spring can produce dropper loading force
Influence is given birth to, and the power is lost also with spring will constantly to change, the load of power and displacement can have error and actual conditions
The connection of middle carrier cable and dropper is quite different；(3) patent CN201721426702.1, CN201711043723.X and
CN201810139844.2 carries out dropper displacement load using eccentric wheel or rotation lifting part, and the decrement of only several fixations can
For using, when needing other decrements, it need to redesign and process eccentric wheel or rotation lifting part, use are very inconvenient.(4)
5 patents before carry out displacement load to dropper using the half period sine curve in national standard, and when actual motion, dropper is in place
The starting for moving load is not zero with finish time movement velocity, acceleration, and displacement load is there are error and is difficult to realize；(4)
Patent CN201720777240.1 and CN201710511861.X are single channel, are only capable of testing a dropper every time,
The inefficiency for the fatigue test for needing to repeat million thousands of times.
Summary of the invention
The present invention is directed to propose a kind of multichannel dropper fatigue experimental device, using high speed electric cylinders control force and displacement, energy
The fatigue test under different operating conditions is carried out to four droppers simultaneously, substantially increases test efficiency.
A kind of multichannel dropper fatigue experimental device, which is characterized in that including upper beam, support rod, upper end clamping device,
Dropper, lower end clamping device, workbench, pedestal and fatigue tester monitoring system.Wherein, upper beam is disc, can
Four upper end clamping devices are arranged symmetrically, are connected between the two by tight fixed bolt；Servo electricity is installed in the clamping device of upper end
Cylinder is realized using electric cylinders movement and is loaded to the power of dropper, while end can be realized with force sensor and be precisely controlled；Workbench
For corresponding disc, there are four lower end clamping devices for platform upper surface arrangement corresponding with upper end clamping device, in each lower end
One high speed electric cylinders is respectively installed in clamping device, realizes that the displacement to dropper loads by the high speed electric cylinders, is pressed from both sides using both ends
Holding installation is the effect in order to simulate carrier cable and contact line to dropper, by adjusting the electric cylinders in the clamping device of top and bottom
Kinematic parameter can carry out the fatigue test of different operating conditions to four droppers simultaneously.
In a kind of above-mentioned multichannel dropper fatigue experimental device, upper beam for fix 4 upper end clamping devices and
Support rod is linked between upper end clamping device and crossbeam by tight fixed bolt.
In a kind of above-mentioned multichannel dropper fatigue experimental device, the upper end clamping device include servo electric cylinders and
High-precision Torque Control may be implemented in fixed bracket, servo electric cylinders, can realize dropper loading tensile by increasing force snesor
It accurately controls, realizes simulation of the carrier cable to dropper pulling force；
Further include push rod, be connected by screw rod with electric cylinders, lower end is connected with dropper, push rod in support bracket fastened hole slot on
Lower slider can be adjusted dropper initial position, to meet the test demand of different length dropper；
It further include laser displacement sensor, sensor is placed on fixed bracket, is clamped by measurement bracket end face to lower end
The distance of the disk of clamping head obtains dropper decrement in device, to be modified to control signal.
In a kind of above-mentioned multichannel dropper fatigue experimental device, the lower end clamping device includes clamping head, lower end
Screw rod, fixed platform, high speed electric cylinders and studdle；Clamping head includes a disc structure, is used for laser displacement sensor
Positioning distance measuring；Electric cylinders are fixedly connected by platform bolt with fixed platform, and the other end and workbench are fixed；Clamping head and dropper
It is fixedly connected, electric cylinders output end drives dropper to move up and down by screw rod and clamping head, and when simulation train crosses, pantograph is jacked up
Contact line achievees the purpose that fatigue test to drive pumping for dropper；Displacement load is carried out using electric cylinders, it can root
The curve for modifying displacement load at any time according to demand, facilitates fatigue test.
In a kind of above-mentioned multichannel dropper fatigue experimental device, the fatigue tester monitoring system includes control cabinet
And control module.It include main controller, sensor acquisition module and control signal output module in control cabinet, wherein main controller is negative
Blame the whole control of monitoring system.
Present invention has an advantage that the 1, output by controlling each electric cylinders, can simultaneously carry out more droppers different
Fatigue test under operating condition improves test efficiency；2, there is controlling party as power and displacement output power using high speed electric cylinders
Just, the advantages that precision is high, and response is rapid, and the service life is long；3, the distance between upper and lower side clamping device can be freely adjusted, it is convenient to difference
Length dropper carries out fatigue test；4, using iterative learning control method, a kind of motion controller is devised, Correction and Control is passed through
Amount realizes the given desired trajectory of high precision tracking；5, using quintic algebra curve in national standard displacement load sine curve into
Row amendment, increases the realizability of testing machine.
Detailed description of the invention
Fig. 1 is overall structure figure of the invention
Fig. 2 is upper end clamping device figure.
Fig. 3 is lower end clamping device figure；.
Fig. 4 is the fatigue tester control algolithm block diagram based on iterative learning.
Fig. 5 be in national standard dropper fatigue test (1 be compression half period；2 be the half period by internal power；3
For compression；4 be power).
Fig. 6 is dropper load fair curve figure.
Specific embodiment
Dropper fatigue experimental device provided by the invention is described in detail with reference to the accompanying drawings and examples, it is described
It is explanation of the invention rather than limits.
Structural principle of the invention is introduced first.Including upper beam, support rod, upper end clamping device, dropper, lower end clamping
Device, workbench, pedestal and fatigue tester monitoring system.
Wherein upper end clamping device and lower end clamping device respectively there are four, different operating conditions can be carried out to four droppers simultaneously
Simulation fatigue test.
Wherein, upper end clamping device includes high speed electric cylinders, screw rod, fixed bracket, push rod and force snesor, high speed electric cylinders
It is linked by tight fixed bolt with upper beam with fixed bracket, high speed electric cylinders are by screw rod pulling push rod, can be in addition force snesor
Accurate control is applied to the power load of dropper, to simulate carrier cable to the pulling force of dropper；Laser displacement is housed on fixed bracket
Sensor can be obtained dropper and moving by measuring the disk distance of fixed bracket end face clamping head into lower end clamping device
Decrement in the process.
Wherein, lower end clamping device include another model high speed electric cylinders, screw rod, clamping head, fixed platform, studdle,
The electric cylinders are fixed in fixed platform and workbench by tight fixed bolt, by output shift quantity, drive clamping head by screw rod, into
And dropper is driven to move up and down, dropper is simulated when train crosses, and dropper caused by pantograph jacks up contact line is reciprocal
Movement, different operating conditions can be simulated with different displacements and speed, realize fatigue test.
Wherein, fatigue tester monitoring system includes control cabinet and control software, contains main controller, sensor in control cabinet
Acquisition module and control signal output module, wherein main controller is responsible for the whole control of monitoring system, such as by controlling signal
Output module drives electric cylinder movement, acquires electric cylinders moving displacement, dropper stress and ambient video by sensor acquisition module
Information etc..
Wherein, control choice of software iterative learning control ILC carries out motion Controller Design, can be controlled by iterated revision
Amount realizes the given desired trajectory of high precision tracking.
In figure: 1 upper beam；2 support rods；3 upper ends clamping equipment；4 droppers；5 lower end clamping devices；6 workbenches；7 bottoms
Seat；8 tight fixed bolts；9 fixed brackets；10 high speed electric cylinders are small；11 screw rods；12 force snesors；13 push rods；14 laser displacements sensing
Device；15 clamping heads；16 lower end screw rods；17 fixed platforms；18 platform bolts；19 high speed electric cylinders are big；20 studdles.
As shown in Figure 1, the invention includes upper beam, support rod, upper end clamping device, dropper, lower end clamping device, work
Platform and pedestal.Upper beam is provided with screw hole, fixed bracket and high speed electric cylinders are small for fixing four upper end clamping devices thereon
It is connected by tight fixed bolt with it；
High speed electric cylinders power output in the clamping device of upper end, is connected by screw rod with push rod；Circle is provided on fixed bracket
Shape guide groove, cylindrical push rod can move up and down wherein, in order to adjust the initial position of dropper；
Cylindrical push rod upper end is equipped with force snesor, can measure the size for applying pulling force to dropper；The cooperation of high speed electric cylinders
The output of accurate control force may be implemented in force snesor, controls precision up to 1%；
Section part is mounted with laser displacement sensor on fixed bracket, clamps dress to lower end by the fixed end face of measurement bracket
Distance between the disc structure of clamping head is set, the decrement of dropper during the motion can be obtained, and then essence is carried out to movement
Really control；
Upper beam is fixed by the support rod on pedestal；
Dropper length can be in 0.5m --- and it is adjusted within the scope of 1.5m, hanging of working in practical difference operating condition can be simulated
String；
It is fixed on workbench that there are four lower end corresponding with upper end clamping device clamping device, each lower end clamping devices
Big, fixed platform, studdle and clamping head including high speed electric cylinders；
Disc structure on clamping head is used for the positioning of laser displacement sensor；
Fixed platform is supported on workbench by studdle, and high speed electric cylinders pass through greatly tight fixed bolt and fixed platform
It is fixedly connected with workbench, output is displacement, and clamping head and dropper lower end are connected, and electric cylinders drive clamping head by screw rod
It moves up and down, when simulation train crosses, dropper is due to the shake up and down of generation by the upward top contact line effect of train pantograph
It swings；
Fatigue tester Design of Monitoring and Control System includes hardware design and software design.Hardware components will be made of 4 parts,
It include: main controller, electric cylinder, sensor and input/output unit.
1. main controller: being the core of monitoring system, be mainly responsible for electric cylinder motion control, Correlation method for data processing and deposit
Storage etc.；
2. electric cylinder is the critical component of monitoring system, the compression of dropper is realized by the movement of electric cylinder, completes dropper
Testing fatigue；
3. sensor includes that displacement sensor, force value sensor and video monitoring sensor are protected by the detection of sensor
Demonstrate,prove the normal operation of monitoring system；
4. input/output unit operation computer is the bridge that user interacts with monitoring system, is adjusted and supervised by output equipment
System parameter is controlled, realizes fatigue test；Test result is obtained by output equipment, it was demonstrated that the validity of monitoring system.
Testing machine operation control is the core of monitor system software design, and mainly include the content of three parts: parameter is set
It sets, equipment operation controls and data processing.
Wherein, parameter setting is the prerequisite that testing machine works normally, only correct setting relevant parameter, just can be with
Guarantee test is normally carried out.This monitoring system is firstly the need of transducer calibration and equipment alarm parameter is carried out, wherein sensor
Calibration mainly demarcates force value sensor and displacement sensor.
Wherein, electric cylinder motion Controller Design includes: 1, the design of feedback controller, and feedback is adjusted on testing machine
Pid parameter；2, the design of ILC controller: a) being directed to the reference input of a certain determination, and the pid parameter in test adjusting ILC obtains
To learning function L；B) Q filtering bandwidth is adjusted, test obtains optimal convergence error；C) it is tested, is remembered according to above-mentioned parameter
ILC after record convergence controls input；D) it is directed to different reference inputs, obtains different optimal ILC control inputs, foundation passes through
Control input magazine after ILC study；
Wherein, in order to guarantee that the reliability of fatigue test, system have used force snesor and displacement sensor to dropper
Test situation is monitored, and force snesor is used to measure the stress of dropper, and displacement sensor tests the pressure of dropper every time
Contracting amount.Before on-test, it is necessary to be demarcated to sensor, to guarantee that sensing data measurement is accurate；For evaluation test
Feasibility, need to compare data and the real-time parameter of electric cylinder that sensor acquires, by error analysis, assess tired
The setting parameter of labor test and the error of actual tests result, judge the reliability of test.Data processing section is mainly to electronic
Kinematic parameter (frequency, amplitude) of cylinder etc., dropper stress condition carry out statistics and analysis, for subsequent use.
Where describing general principles and advantage, not the scope of the present invention is carried out
It limits, not departing from the present invention relates under the premise of spirit, the present invention also has various change and can improve, and should fall into requirement
In the scope of the invention of protection.
Claims (5)
1. a kind of multichannel high iron catenary dropper fatigue experimental device, which is characterized in that including upper beam (1), support rod
(2), upper end clamping device (3), dropper (4), lower end clamping device (5), workbench (6), pedestal (7) and fatigue tester
Monitoring system, wherein upper beam is disc, can be arranged symmetrically four upper end clamping devices, pass through tight fixed bolt between the two
It is connected；Servo electric cylinders are installed in the clamping device of upper end, is realized using electric cylinders movement and the power of dropper is loaded, while end is furnished with
Force snesor can be realized and is precisely controlled；Workbench is corresponding disc, platform upper surface cloth corresponding with upper end clamping device
Lower end clamping device there are four setting, a high speed electric cylinders are respectively equipped in each lower end clamping device, pass through the high speed electric cylinders
It realizes that the displacement to dropper loads, the use of both ends clamping installation is the effect in order to simulate carrier cable and contact line to dropper, leads to
The electric cylinders kinematic parameter in adjustment top and bottom clamping device is crossed, the fatigue that can carry out different operating conditions to four droppers simultaneously is tried
It tests.
2. a kind of multichannel dropper fatigue experimental device according to claim 1, which is characterized in that upper beam (1) is used for
4 upper end clamping devices (3) and support rod (2) are fixed, is linked between upper end clamping device and crossbeam by tight fixed bolt.
3. a kind of multichannel dropper fatigue experimental device according to claim 1, which is characterized in that the upper end clamping
Device (3) includes servo electric cylinders (10) and fixes bracket (9), and servo electric cylinders may be implemented high-precision Torque Control, pass through increasing
Accurately controlling for dropper loading tensile can be achieved in reinforcing sensor (12), realizes simulation of the carrier cable to dropper pulling force；
Further include push rod (13), be connected by screw rod (11) with electric cylinders (10), lower end is connected with dropper (4), and push rod is in fixed branch
It slides up and down, dropper initial position can be adjusted in the hole slot of frame (9), to meet the test need of different length dropper
It asks；
It further include laser displacement sensor (14), sensor is placed on fixed bracket, is clamped by measurement bracket end face to lower end
The distance of the disk of clamping head (15) obtains dropper decrement in device, to be modified to control signal.
4. a kind of multichannel dropper fatigue experimental device according to claim 1, which is characterized in that the lower end clamping
Device (5) includes clamping head (15), lower end screw rod (16), fixed platform (17), high speed electric cylinders (19) and studdle (20)；
Clamping head (15) includes a disc structure, is used for laser displacement sensor (14) positioning distance measuring；Electric cylinders pass through platform bolt
(18) it is fixedly connected with fixed platform (17), the other end and workbench (6) are fixed；Clamping head (15) is fixedly connected with dropper,
Electric cylinders output end drives dropper to move up and down by screw rod and clamping head, when simulation train crosses, pantograph jack up contact line from
And pumping for dropper is driven, achieve the purpose that fatigue test；Carry out displacement load using electric cylinders, can according to demand with
The curve of Shi Xiugai displacement load, facilitates fatigue test.
5. a kind of multichannel dropper fatigue experimental device according to claim 1, which is characterized in that the fatigue test
Machine monitoring system includes control cabinet and control module, includes main controller, sensor acquisition module and control signal in control cabinet
Output module, wherein main controller is responsible for the whole control of monitoring system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543356.4A CN109596330A (en) | 2018-12-17 | 2018-12-17 | A kind of multichannel high iron catenary dropper fatigue experimental device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811543356.4A CN109596330A (en) | 2018-12-17 | 2018-12-17 | A kind of multichannel high iron catenary dropper fatigue experimental device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110346227A (en) * | 2019-08-07 | 2019-10-18 | 中法高速铁路技术(西安)有限公司 | A kind of experimental rig of electric railway dropper fatigue strength |
| CN111272409A (en) * | 2020-04-13 | 2020-06-12 | 中国铁道科学研究院集团有限公司标准计量研究所 | Lower-driving type integral dropper fatigue test device |
| CN111351625A (en) * | 2020-04-13 | 2020-06-30 | 中国铁道科学研究院集团有限公司标准计量研究所 | Pendant lump type integral dropper fatigue test device |
| WO2021134738A1 (en) * | 2020-01-02 | 2021-07-08 | 西南交通大学 | Catenary dropper fatigue test device and method therefor |
| CN113532820A (en) * | 2021-06-24 | 2021-10-22 | 中国铁道科学研究院集团有限公司 | Hydraulic multichannel dropper vibration fatigue test device |
| CN113970431A (en) * | 2021-10-22 | 2022-01-25 | 中国铁道科学研究院集团有限公司标准计量研究所 | Multichannel contact net spare part fatigue test device |
| CN114049559A (en) * | 2021-11-17 | 2022-02-15 | 西南交通大学 | Non-contact measurement method and device for overall dropper load of railway contact network |
| CN116879077A (en) * | 2023-09-04 | 2023-10-13 | 中国铁建电气化局集团有限公司 | Integrated detection device for fatigue strength of electrified railway hanger |
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| CN110346227A (en) * | 2019-08-07 | 2019-10-18 | 中法高速铁路技术(西安)有限公司 | A kind of experimental rig of electric railway dropper fatigue strength |
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| CN111351625A (en) * | 2020-04-13 | 2020-06-30 | 中国铁道科学研究院集团有限公司标准计量研究所 | Pendant lump type integral dropper fatigue test device |
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| CN113532820B (en) * | 2021-06-24 | 2023-12-01 | 中国铁道科学研究院集团有限公司 | Hydraulic multi-channel hanger vibration fatigue test device |
| CN113532820A (en) * | 2021-06-24 | 2021-10-22 | 中国铁道科学研究院集团有限公司 | Hydraulic multichannel dropper vibration fatigue test device |
| CN113970431A (en) * | 2021-10-22 | 2022-01-25 | 中国铁道科学研究院集团有限公司标准计量研究所 | Multichannel contact net spare part fatigue test device |
| CN113970431B (en) * | 2021-10-22 | 2023-02-17 | 中国铁道科学研究院集团有限公司标准计量研究所 | Multichannel contact net spare part fatigue test device |
| CN114049559A (en) * | 2021-11-17 | 2022-02-15 | 西南交通大学 | Non-contact measurement method and device for overall dropper load of railway contact network |
| CN114049559B (en) * | 2021-11-17 | 2022-10-14 | 西南交通大学 | Non-contact measurement method and device for overall dropper load of railway contact network |
| CN116879077B (en) * | 2023-09-04 | 2023-12-19 | 中国铁建电气化局集团有限公司 | Integrated detection device for fatigue strength of electrified railway hanger |
| CN116879077A (en) * | 2023-09-04 | 2023-10-13 | 中国铁建电气化局集团有限公司 | Integrated detection device for fatigue strength of electrified railway hanger |
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