CN207570941U - A kind of Contact Net's Suspension Chord fatigue experimental device - Google Patents
A kind of Contact Net's Suspension Chord fatigue experimental device Download PDFInfo
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- CN207570941U CN207570941U CN201721426702.1U CN201721426702U CN207570941U CN 207570941 U CN207570941 U CN 207570941U CN 201721426702 U CN201721426702 U CN 201721426702U CN 207570941 U CN207570941 U CN 207570941U
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- dropper
- contact net
- fatigue
- lifting apparatus
- experimental device
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Abstract
The utility model discloses a kind of Contact Net's Suspension Chord fatigue experimental devices, drive the lifting of dropper lower part, and it is discharged in certain altitude, the lower part of dropper is made to fall by free gravity, the top of dropper can be to maintain and rigidly fix, passive flexible fastening can also be used, dropper lower motion can also be cooperated on one's own initiative by the way of simulation carrier cable movement.The utility model can be such that in the fatigue test of dropper fatigue load loaded process is not influenced by mechanical actuation device individual parameters itself are uppity；Meanwhile, it is capable to simulate more true dropper scene actual condition, the accuracy of dropper fatigue test results is improved.
Description
Technical field
The utility model belongs to contact net technical field more particularly to a kind of Contact Net's Suspension Chord fatigue experimental device.
Background technology
Contact net is set up along electric railway, and the electric energy dedicated for providing electric energy to electric locomotive or EMU passes
Defeated structure, mainly by contact suspension, positioning with device, pillar and basis is supported to form, the electric power run in electric railway
Locomotive or EMU by the pantograph mounted on its roof and contact suspension sliding contact, so as to complete electric energy from electric system to
The transmission of locomotive, and then train is driven to advance.
Wherein, dropper is for connection to carrier cable and the critical component of contact line, and effect is to determine contact line in space
Position, and contact line is made to keep the state of opposing straight in the air, so as to make pantograph with contact line sliding contact process
In more smooth out, therefore, in pantograph and contact net interaction process, dropper bears complicated load, including static state
Alternating download in load, the bending load of dropper relaxation, the shock loading of dropper exceptionally straight moment and follow-up vibration processes
Lotus etc..
The dropper fatigue failure event of different scales is had discovered that during the operation of contact net scene, dropper once occurs
Failure, gently then damages pantograph, heavy then Pantograph-OCS system failure, electric substation is caused, which to trip etc., leads to the events such as Train Stopping, especially
It is high-speed railway, the influence of train accidental power failure is more severe.
Therefore, it during the laboratory research about dropper fatigue, needs to carry out quantitative dropper fatigue test, it is existing
Dropper fatigue test method mostly using top load by the way of.
And existing dropper fatigue test method is primarily present following shortcoming：
1. the type of drive and motion process of dropper have significant difference with dropper scene actual condition；Dropper scene is typical
Actual condition is that pantograph raises contact line, i.e. dropper lower part is raised, and is less than raising speed in contact line in the carrier cable rate of climb
In the case of degree, dropper relaxes, and in pantograph by rear, contact line sharp downward movement drives dropper exceptionally straight therewith, existing
The process and dropper scene actual condition lifted in some dropper fatigue test methods from top is not inconsistent.
2. dropper fatigue test results are related with the execution frequency of the single period of motion；From the point of view of theory analysis, dropper stretches tight
Straight moment, the stress inside dropper are an important factor for influencing dropper fatigue life, and are hung in existing dropper fatigue test method
Other than the quality for depending on mass, the speed that runs up also with dropper top before impact has the stress of string exceptionally straight moment
It closes, speed is faster, and moment stress is bigger.The running orbit on existing dropper top is set generally according to sinusoidal motion, so, it is each
If the execution frequency of a period of motion is higher, the speed of service of the dropper top Jing Guo same point is faster.If dropper fatigue is tried
Test result it is related with the execution frequency of the single period of motion if, then need accurately to calculate the test frequency that use, and show
There is standard not provide, and dyscalculia in this respect, in addition, blindly carrying out on the basis of existing dropper fatigue test method
Accelerated fatigue test is more a lack of foundation, if being still to perform accelerated test, directly affects the convincingness of experimental result.And it hangs
String by force of the breath action time can the driving force of tested experiment device influenced, if driving force is poor, dropper top exists
Impact moment may occur of short duration deceleration and further accelerate, and fruit experimental rig machining tolerance is larger for another example, may impact moment by
Under the influence of the spacious amount of tolerance, dropper ionized motion moment is caused to stop and be again started up after by spacious amount, dropper is caused to impact
Moment stress be difficult control or it is uncontrollable.
Utility model content
In order to overcome the shortcomings of art methods, the purpose of this utility model is that proposing a kind of Contact Net's Suspension Chord fatigue
Experimental rig makes fatigue load loaded process in the fatigue test of dropper not easily-controllable by mechanical actuation device individual parameters itself
The influence of system；Meanwhile, it is capable to simulate more true dropper scene actual condition, the accuracy of dropper fatigue test results is improved.
In order to achieve the above object, the utility model is using technical solution：A kind of Contact Net's Suspension Chord fatigue experimental device, packet
Main body frame, dropper fixing piece, lifting apparatus, mass, power transmission shaft and motor are included, the dropper fixing piece is arranged on
The top of main body frame, the lifting apparatus are arranged on the bottom of main body frame, and the lower end of the lifting apparatus connects mass,
The motor drives lifting apparatus by power transmission shaft, and lifting apparatus makes mass move vertically.
Further, it is provided with height adjustment mechanism on the dropper fixing piece；Dropper height can arbitrarily be adjusted.
Further, the height adjustment mechanism is telescopic rod, it is convenient and reliable to adjust process.
Further, the lifting apparatus is rotation lifting part, the rotation lifting part includes rotating cylindrical body, climbs
Ramp and rotary shaft, the ramp of climbing are placed on the outer surface of rotating cylindrical body, and the rotary shaft is placed in the rotating cylindrical
On the axis of body；Precision height is lifted, improves the accuracy of experimental result.
Using the advantageous effect of the technical program：
1. dropper top passive movement is realized by the way that dropper lower part is made actively to lift free-falling again in the present invention, so as to
The motion state for realizing entire dropper is consistent with real scene operating mode；
2. using the experimental method and device of the present invention, make dropper inside maximum tension stress in other conditions unanimous circumstances
Under, it is only related with counterweight amount of substance and dropper lower part rising height so that experimentation is fully controllable；And maximum drawing inside dropper
Stress is not influenced by lifting driving structure parts fit tolerance so that the moment stress of dropper impact is controllable；
Under the premise of 3. dropper lower part can be raised to setting peak by the driving device in the present invention, motor or other drives
The watt level of flowing mode does not interfere with maximum tension stress inside dropper, i.e., rotational speed of driving unit is non-constant does not influence inside dropper
Maximum tension stress；
4. the fixed form on dropper top can be changed in the present invention, it is hit the carrier bullet that power moment is secured in dropper
Property is controllable, so as to make the exceptionally straight minute internal maximum impact force of dropper controllable, while can simulate more complicated dropper field working conditions；
5. the present invention can arbitrarily accelerate test process or slow down test process, that is, accelerate or slow down rotation lifting mechanism
Rotating speed does not influence maximum tension stress inside dropper；Because inside dropper maximum tension stress only with counterweight amount of substance, rising height and
Dropper top installation point stiffness and damping is related, if dropper can with free-falling to extreme lower position, just with whole driving device
The speed of service is unrelated, improves the controllability of experimentation.
Description of the drawings
Fig. 1 is a kind of structure diagram of Contact Net's Suspension Chord fatigue experimental device of the utility model；
Structure diagrams of the Fig. 2 for lifting apparatus in the embodiment of the utility model；
Wherein, 1 is main body frame, and 2 be dropper fixing piece, and 3 be lifting apparatus, and 4 be mass, and 5 be power transmission shaft, 6
It is height adjustment mechanism；31 be rotating cylindrical body, and 32 be ramp of climbing, and 33 be rotary shaft.
Specific embodiment
In order to make the purpose, technical scheme and advantage of utility model clearer, below in conjunction with the accompanying drawings to the utility model
It is further elaborated.
In the present embodiment, shown in Figure 1, a kind of Contact Net's Suspension Chord fatigue experimental device including main body frame 1, is hung
String fixing piece 2, lifting apparatus 3, mass 4, power transmission shaft 5 and motor, the dropper fixing piece 2 are arranged on main body frame
1 top, the lifting apparatus 3 are arranged on the bottom of main body frame 1, the lower end connection mass 4 of the lifting apparatus 3, institute
It states motor and lifting apparatus 3 is driven by power transmission shaft 5, lifting apparatus 3 makes mass 4 move vertically.
As the prioritization scheme of above-described embodiment, height adjustment mechanism 6 is provided on the dropper fixing piece 2；It can
Arbitrarily adjust dropper height.
The height adjustment mechanism 6 is telescopic rod, and it is convenient and reliable to adjust process.
As the prioritization scheme of above-described embodiment, as shown in Fig. 2, the lifting apparatus 3 is rotation lifting part, the rotation
It is lifted part and includes rotating cylindrical body 31, climb ramp 32 and rotary shaft 33, the ramp 32 of climbing is placed in rotating cylindrical body 31
On outer surface, the rotary shaft 33 is placed on the axis of the rotating cylindrical body 31；It is high to be lifted precision, improves experimental result
Accuracy.
In order to be better understood from the utility model, make primary complete description to the operation principle of the utility model below：
The lifting of dropper lower part is driven, and is discharged in certain altitude, the lower part of dropper is made to fall by free gravity, dropper
Top can be to maintain and rigidly fix, and can also use passive flexible fastening, can also be by the way of simulation carrier cable movement
Cooperate with dropper lower motion on one's own initiative.
The advantages of basic principle, main feature and the utility model of the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Only illustrate the principle of the utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
Various changes and modifications are had, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (4)
1. a kind of Contact Net's Suspension Chord fatigue experimental device, which is characterized in that including main body frame (1), dropper fixing piece (2), lift
It rises device (3), mass (4), power transmission shaft (5) and motor, the dropper fixing piece (2) and is arranged on main body frame (1)
Top, the lifting apparatus (3) is arranged on the bottom of main body frame (1), the lower end connection mass of the lifting apparatus (3)
(4), the motor drives lifting apparatus (3) by power transmission shaft (5), and lifting apparatus (3) makes mass (4) vertically transport
It is dynamic.
2. a kind of Contact Net's Suspension Chord fatigue experimental device according to claim 1, which is characterized in that fixed in the dropper
Height adjustment mechanism (6) is provided on part (2).
3. a kind of Contact Net's Suspension Chord fatigue experimental device according to claim 2, which is characterized in that the height adjusts machine
Structure (6) is telescopic rod.
A kind of 4. Contact Net's Suspension Chord fatigue experimental device according to claim 3, which is characterized in that the lifting apparatus
(3) it is rotation lifting part, the rotation lifting part includes rotating cylindrical body (31), ramp of climbing (32) and rotary shaft (33), institute
It states ramp of climbing (32) to be placed on the outer surface of rotating cylindrical body (31), the rotary shaft (33) is placed in the rotating cylindrical body
(31) on axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721426702.1U CN207570941U (en) | 2017-10-31 | 2017-10-31 | A kind of Contact Net's Suspension Chord fatigue experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721426702.1U CN207570941U (en) | 2017-10-31 | 2017-10-31 | A kind of Contact Net's Suspension Chord fatigue experimental device |
Publications (1)
| Publication Number | Publication Date |
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| CN207570941U true CN207570941U (en) | 2018-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721426702.1U Active CN207570941U (en) | 2017-10-31 | 2017-10-31 | A kind of Contact Net's Suspension Chord fatigue experimental device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727521A (en) * | 2017-10-31 | 2018-02-23 | 西南交通大学 | A kind of Contact Net's Suspension Chord fatigue test method and device |
| CN109596330A (en) * | 2018-12-17 | 2019-04-09 | 武汉大学 | A kind of multichannel high iron catenary dropper fatigue experimental device |
| 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 |
-
2017
- 2017-10-31 CN CN201721426702.1U patent/CN207570941U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727521A (en) * | 2017-10-31 | 2018-02-23 | 西南交通大学 | A kind of Contact Net's Suspension Chord fatigue test method and device |
| CN107727521B (en) * | 2017-10-31 | 2024-04-12 | 西南交通大学 | Fatigue test method and device for catenary hanger |
| CN109596330A (en) * | 2018-12-17 | 2019-04-09 | 武汉大学 | A kind of multichannel high iron catenary dropper fatigue experimental device |
| 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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