CN101476951B - Swing bolster load test structure - Google Patents
Swing bolster load test structure Download PDFInfo
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- CN101476951B CN101476951B CN2009100774410A CN200910077441A CN101476951B CN 101476951 B CN101476951 B CN 101476951B CN 2009100774410 A CN2009100774410 A CN 2009100774410A CN 200910077441 A CN200910077441 A CN 200910077441A CN 101476951 B CN101476951 B CN 101476951B
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- side bearing
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- seat
- dynamometric
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Abstract
The invention provides a swing bolster load testing structure and a testing method thereof. In the structure, a center plate dynamometric seat is processed with a center plate, and is a round blind hole; a center plate dynamometric sensor component can be placed in the center plate dynamometric seat; an upper center plate of an automobile body is placed in the center plate dynamometric seat, and is pressed above the center plate dynamometric sensor component; a pin roll passes through a lower center plate and the center plate dynamometric sensor component, and pivots the swing bolster and theautomobile body; a side bearer dynamometric seat processed with on each side bearer; a side bearer dynamometric sensor is placed in the side bearer dynamometric seat; and a signal acquisition device collects signals measured by the center plate dynamometric sensor component and the side bearer dynamometric sensors. As the method acquires center plate force and offset and side bearing force of thecenter plate force in a mode of direct measurement, testing accuracy of the center plate force can be obviously improved, steps of load calibration in a laboratory can be reduced, period of the test job is shortened, and man power and physical resources are saved.
Description
Technical field
The present invention relates to the bolster structure of train.
Background technology
Development over surplus China's goods and equipment technology nearly ten year, the fatigue reliability problem of lorry structure is the key factor of restriction goods and equipment skill upgrading.If fatigue crack damage takes place when significantly being lower than designed life the lorry structure prematurely, the maintenance cost of lorry is high with making, and seriously jeopardizes traffic safety.Because existing Structural Strength Design standard of lorry and test standard are not perfect, particularly lack the fatigue strength design specifications and the test standard that meet China's practice condition.Therefore, carry out the test of wagon load spectrum, upgrade the Intensity Design standard and the test standard of China's lorry structure, become a very urgent job.
In the test job of wagon load spectrum, generally be sensor with the truck bolster, by the dynamometry bolster test on the car body vertical, sidewinder and torsional load, its concrete method of testing may further comprise the steps:
1, pastes foil gauge; As shown in Figure 1, bolster 10 comprises cartridge 11 and is arranged on the side bearing 12 of cartridge 11 both sides, existing method of testing is to paste foil gauge 13 at side bearing box place, paste foil gauge 15 at the central plane of symmetry 14 places of bolster 10, and the central plane of symmetry 14 near and the position stickup foil gauge 16 that stress is big, stress gradient is less;
2, carry out rating test; It may further comprise the steps again:
1) in the laboratory, adds load P successively at cartridge 11 and two side bearing 12 places respectively
1, P
2, P
3, and measure the stress intensity at each foil gauge place simultaneously; Wherein, load p
1And there is eccentric throw L between the central plane of symmetry 15 of bolster 10;
2) survey in vehicle operating, omnidistance continuous acquisition obtains the strain-time history of the paste position of each foil gauge 13,15,16, calculates the measured stress value of the paste position of each foil gauge 13,15,16;
3) be known conditions with lab investigation data and measured data, set up system of equations according to superposition principle, the group of solving an equation then obtains the real load and the actual eccentric throw at cartridge 11 and two side bearing 12 places, finish the demarcation of bolster cartridge and load on side bearing, and decomposition computation goes out three kinds of load p
1, P
2, P
3Calibration coefficient;
3,, change the strain-time history of the paste position of each foil gauge 13,15,16 into load-time history by the calibration coefficient that rating test drew.
Adopt though the Analysis on Fatigue Reliability that above-mentioned existing swing bolster load method of testing is China's lorry structure institute is a large amount of, yet test job person finds in the course of the work that also there is the not accurate enough problem of test structure in it that reason is:
1, because the cartridge place of bolster is difficult to directly paste foil gauge, therefore can only obtain the load value at cartridge place by rating test indirectly, the process complexity in the middle of this certainly exists error.
2, use foil gauge to measure stress value, try to achieve load value by solving an equation, its measuring accuracy is far below the measuring accuracy of force cell.
What 3, the use foil gauge measured is strain value, needs numerous and diverse later stage work just can be converted into the load value that we need.
Because the existence of above-mentioned factor, the feasible wagon load that obtains by existing swing bolster load method of testing is composed accurate inadequately, even influences the carrying out of the fatigue reliability research work of lorry structure, becomes those skilled in the art institute urgent problem.
Summary of the invention
At the deficiencies in the prior art, the objective of the invention is to: a kind of swing bolster load test structure is provided, improves the measuring accuracy of swing bolster load test job.
For achieving the above object, the technical solution used in the present invention comprises:
A kind of swing bolster load test structure, described bolster comprise cartridge and are arranged on two side bearings of cartridge both sides, it is characterized in that:
Be processed with a cartridge dynamometry seat at the cartridge place, described cartridge dynamometry seat is provided with circular blind hole, a cartridge force cell assembly is placed wherein, the body center plate of car body is placed in the described cartridge dynamometry seat, and be pressed in above the described cartridge force cell assembly, a bearing pin passes center bearing and described cartridge force cell assembly, and bolster and car body are articulated;
Described cartridge force cell assembly comprises base and cover plate, described base is placed in the described cartridge dynamometry seat, described cover plate contacts with described body center plate, and the center of described base and cover plate all offers a through hole, passes through for described bearing pin; At least three cartridge force transducers are arranged between described base and the cover plate, and an end of each described cartridge force transducer and base butt, and the other end and cover plate butt are to measure the pressure distribution between base and the cover plate;
Also comprise signal pickup assembly, be used for collecting the measured signal of described cartridge force cell assembly.
In the preferable technical scheme: described cartridge dynamometry seat is extended with the protruding edge of a circle towards the upper surface of cartridge, is used for blocking the edge of described body center plate.
In the preferable technical scheme: be processed with a side bearing dynamometry seat at each side bearing place, described side bearing dynamometry seat is provided with a blind hole, in described side bearing dynamometry seat, be provided with a side bearing force cell, place elastic side bearing on the described side bearing force cell, the body side bearer butt of described elastic side bearing and car body; Described side bearing force cell is connected with described signal pickup assembly.
In the preferable technical scheme: after sensor and elastic side bearing were placed in the bottom of described side bearing dynamometry seat, the height on the last plane of elastic side bearing was consistent with former design load.
In the preferable technical scheme: described base is provided with at least three post holes, each post hole lower end closed, the upper end is open, place a described cartridge force transducer in each post hole, the height of described cartridge force transducer is greater than the degree of depth in described post hole, one distal process is for the upper surface of base, and the lower surface of described cover plate contacts with the jag of each described cartridge force transducer, and the upper surface of cover plate contacts with described center bearing.
In the preferable technical scheme: left and right symmetrically offers four coupled columns holes on the described base.
In the preferable technical scheme: on described base, also be provided with at least two pilot holes, the position of two dowel holes that are provided with in described pilot hole and the cartridge dynamometry seat is corresponding, two register pins are located in described pilot hole and the dowel hole, described cartridge force cell assembly is left and right symmetrically is installed in the cartridge dynamometry seat.
Compared with prior art, the advantage that adopts the present invention of technique scheme to have is:
1, the mode by direct measurement obtains cartridge power, can significantly improve the measuring accuracy of cartridge power;
2, reduce the step of carrying out load calibration in the laboratory, shortened the cycle of test job, saved the man power and material;
3, carry out the resulting load value of Load Identification owing to adopt force transducer to substitute, can greatly improve the precision of test result by the foil gauge test structure;
4, can directly obtain load value by force transducer, reduce the later stage work amount, and accelerate the establishment speed of wagon load spectrum.
Description of drawings
Fig. 1 is existing dynamometry bolster load and point position synoptic diagram when carrying out load calibration;
Fig. 2 be the bolster that adopts of the present invention partly cut open synoptic diagram;
Fig. 3 is the A-A cut-open view of Fig. 2;
Fig. 4 is the B-B cut-open view of Fig. 2;
Fig. 5 is the vertical view of Fig. 2;
Fig. 6 is the planar structure synoptic diagram (plate not with cover) of cartridge force cell assembly;
Fig. 7 is the C-C cut-open view (plate with cover and cartridge force transducer) of Fig. 6.
Description of reference numerals: bolster 10; Bolster 10 '; Cartridge 11; Side bearing 12; Foil gauge 13; Central authorities' plane of symmetry 14; Foil gauge 15; Foil gauge 16; Load p
1, P
2, P
3Eccentric throw L; Cartridge dynamometry seat 20; The edge 201 of projection; Dowel hole 21; Kingpin hole 22; Cartridge force cell assembly 30; Base 31; Through hole 311; Post hole 312; Pilot hole 313; Cover plate 32; Cartridge force transducer 33; Through hole 321; Side bearing dynamometry seat 40; Elastic side bearing 42; Side bearing force cell 43.
Embodiment
As shown in Figure 2, be the swing bolster load test structure that the present invention adopts, described bolster 10 ' comprises cartridge 11 and is arranged on the side bearing 12 of cartridge 11 both sides that its improvements comprise:
Be processed with a cartridge dynamometry seat 20 at cartridge 11 places, described cartridge dynamometry seat 20 is circular blind hole, can place wherein for a cartridge force cell assembly 30, the edge 201 of a circle projection is arranged on cartridge dynamometry seat 20 limits, to replace the center bearing on the bolster 10 '; When the cartridge 11 of described bolster 10 ' is installed on the bogie, at first described cartridge force cell assembly 30 is placed on the bottom of described cartridge dynamometry seat 20, make the center bearing of car body fall into protruding edge 201 then, and be pressed in described cartridge force cell assembly 30 tops, use a bearing pin to pass center bearing then, the set kingpin hole 22 of described cartridge force cell assembly 30 and cartridge dynamometry seat 20 bottoms, with bolster 10 ' and car body are articulated (, in this figure, not drawing) because described center bearing and bearing pin all are to adopt existing structure.And the difference between present embodiment and the existing structure is: removed the center bearing on the existing bolster, made the vertical acting force of body center plate of car body can act on fully on the described cartridge force cell assembly 30; And the edge 201 of the circle projection that described cartridge dynamometry seat 20 extends towards the upper surface of cartridge 11 can block the edge of center bearing, make when center bearing is placed in the cartridge dynamometry seat 20 not can the occurred level direction displacement.
In addition, be processed with a side bearing dynamometry seat 40 at each side bearing 12 place, described side bearing dynamometry seat 40 is an approximate rectangular blind hole, have an appointment half the degree of depth of described blind hole is under the bolster 10 ' upper surface, second half the degree of depth protrudes from bolster 10 ' upper surface, side bearing force cell 43 is placed in bottom at described side bearing dynamometry seat 40, places original elastic side bearing 42 on the top of described side bearing dynamometry seat 40, and guarantees that the last plane of elastic side bearing 42 is consistent with former design height.When the side bearing 12 of described bolster 10 ' is installed on the bogie, the last plane butt of the body side bearer of described car body and described elastic side bearing 42.
Structure as for described cartridge force cell assembly 30, as Fig. 6, shown in Figure 7, it comprises base 31 and cover plate 32, described base 31 is cylindric, the heart offers a through hole 311 therein, pass through for described bearing pin, left and right symmetrically offers four coupled columns holes 312 on the described base 31, each described post hole 312 lower end closed, the upper end is open, can be used to a ccontaining cartridge force transducer 33, on described base 31, also be provided with at least two pilot holes 313, the position of two dowel holes 21 that are provided with in described pilot hole 313 and the cartridge dynamometry seat 20 is corresponding, and by two register pin (not shown) cross-under location, to guarantee that thought-read dish force cell assembly 30 is left and right symmetrically and is installed in the cartridge dynamometry seat 20.
As can see from Figure 7, the height of described cartridge force transducer 33 is greater than the degree of depth in described post hole 312, so the one distal process is for the upper surface of base 31.Described cover plate 32 is tabular, its center offers a through hole 321, pass through for described bearing pin, the lower surface of described cover plate 32 can contact with the jag of each described cartridge force transducer 33, the upper surface of cover plate 32 then can contact with described body center plate, is delivered to exactly on the described cartridge force transducer 33 with the acting force with body center plate.
Use above-mentioned bolster 10 ' to carry out the test job of wagon load spectrum, need not rating test and just can directly survey in vehicle operating, to obtain the load-time history at cartridge 11 and side bearing 12 places, its process is as follows:
1) goes up described cartridge force cell assembly 30 of installation and side bearing force cell 43 at described bolster 10 ', and described bolster 10 ' is installed on the bogie;
2) in vehicle operating, survey, collect the measured signal of described cartridge force cell assembly 30 and side bearing force cell 43 with signal pickup assembly;
3) signal of collecting with signal pickup assembly is a foundation, calculates the load-time history at cartridge 11 and side bearing 12 places; Wherein: side bearing power can directly be obtained by the pressure signal that side bearing force cell 43 records, and cartridge power comprises cartridge central force and cartridge power side-play amount, described cartridge central force equals the stressed summation of all cartridge force transducers 33 in the cartridge force cell assembly 30, and described cartridge power side-play amount calculates by the output quantity of the cartridge force transducer 33 that is symmetrically arranged in the cartridge force cell assembly 30 and the relative position of each cartridge force transducer 33.
It below only is a preferred embodiment of the present invention, and in fact, can also on the basis of the foregoing description, make some modifications, for example, on the described base 31 number in the post hole 312 of left and right symmetrically setting can be a pair of, two pairs, three pairs, five pairs or how right; Even it is asymmetric the position can also to be arranged in post hole 312, for example three post hole 312 distributions triangular in shape, and just so, the computing formula of calculating cartridge power side-play amount is comparatively complicated.
By above description, the advantage that has of the present invention has as can be known:
1, the mode by direct measurement obtains cartridge power, can significantly improve the measuring accuracy of cartridge power;
2, reduce the step of carrying out load calibration in the laboratory, shortened the cycle of test job, saved the man power and material;
3, owing to adopt the power sensor to substitute to carry out load by the foil gauge test structure and identify resulting load value, can greatly improve the precision of test result;
4, can directly obtain load value by the power sensor, reduce the later stage work amount, and accelerate the establishment speed of wagon load spectrum.
More than explanation is for the purpose of the present invention just illustrative; and nonrestrictive, those of ordinary skills understand, in the situation that does not break away from the spirit and scope that claim limits; can make many modifications, variation or equivalence, but all will fall within protection scope of the present invention.
Claims (7)
1. swing bolster load test structure, described bolster comprise cartridge and are arranged on two side bearings of cartridge both sides, it is characterized in that:
Be processed with a cartridge dynamometry seat at the cartridge place, described cartridge dynamometry seat is provided with circular blind hole, a cartridge force cell assembly is placed wherein, the body center plate of car body is placed in the described cartridge dynamometry seat, and be pressed in above the described cartridge force cell assembly, a bearing pin passes center bearing and described cartridge force cell assembly, and bolster and car body are articulated;
Described cartridge force cell assembly comprises base and cover plate, described base is placed in the described cartridge dynamometry seat, described cover plate contacts with described body center plate, and the center of described base and cover plate all offers a through hole, passes through for described bearing pin; At least three cartridge force transducers are arranged between described base and the cover plate, and an end of each described cartridge force transducer and base butt, and the other end and cover plate butt are to measure the pressure distribution between base and the cover plate;
Also comprise signal pickup assembly, be used for collecting the measured signal of described cartridge force cell assembly.
2. swing bolster load test structure according to claim 1 is characterized in that: described cartridge dynamometry seat is extended with the protruding edge of a circle towards the upper surface of cartridge, is used for blocking the edge of described body center plate.
3. swing bolster load test structure according to claim 1, it is characterized in that: be processed with a side bearing dynamometry seat at each side bearing place, described side bearing dynamometry seat is provided with a blind hole, in described side bearing dynamometry seat, be provided with a side bearing force cell, place elastic side bearing on the described side bearing force cell, the body side bearer butt of described elastic side bearing and car body; Described side bearing force cell is connected with described signal pickup assembly.
4. swing bolster load test structure according to claim 3 is characterized in that: after sensor and elastic side bearing were placed in the bottom of described side bearing dynamometry seat, the height on plane was consistent with former design load on the elastic side bearing.
5. swing bolster load test structure according to claim 1, it is characterized in that: described base is provided with at least three post holes, each post hole lower end closed, the upper end is open, place a described cartridge force transducer in each post hole, the height of described cartridge force transducer is greater than the degree of depth in described post hole, and a distal process is for the upper surface of base, the lower surface of described cover plate contacts with the jag of each described cartridge force transducer, and the upper surface of cover plate contacts with described center bearing.
6. swing bolster load test structure according to claim 5 is characterized in that: left and right symmetrically offers four coupled columns holes on the described base.
7. according to claim 5 or 6 described swing bolster load test structures, it is characterized in that: on described base, also be provided with at least two pilot holes, the position of two dowel holes that are provided with in described pilot hole and the cartridge dynamometry seat is corresponding, two register pins are located in described pilot hole and the dowel hole, described cartridge force cell assembly is left and right symmetrically is installed in the cartridge dynamometry seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100774410A CN101476951B (en) | 2009-02-11 | 2009-02-11 | Swing bolster load test structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100774410A CN101476951B (en) | 2009-02-11 | 2009-02-11 | Swing bolster load test structure |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105255780A Division CN101979975B (en) | 2009-02-11 | 2009-02-11 | Swing bolster load testing method |
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| Publication Number | Publication Date |
|---|---|
| CN101476951A CN101476951A (en) | 2009-07-08 |
| CN101476951B true CN101476951B (en) | 2011-01-26 |
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| CN2009100774410A Active CN101476951B (en) | 2009-02-11 | 2009-02-11 | Swing bolster load test structure |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727077B (en) * | 2013-12-23 | 2016-06-29 | 西安轨道交通装备有限责任公司 | The hydraulic control panel of chassis pressure ton testing stand |
| CN106886638B (en) * | 2017-01-22 | 2019-07-09 | 北京理工大学 | A kind of endless-track vehicle transmission shaft loading spectrum preparation method based on Density Estimator |
| CN107618527B (en) * | 2017-08-09 | 2019-05-21 | 中车青岛四方机车车辆股份有限公司 | Sleeper beam and vehicle with it |
| CN108827666A (en) * | 2018-06-27 | 2018-11-16 | 中车眉山车辆有限公司 | A kind of truck bolster for railway wagon fatigue test loading device |
| CN111982536B (en) * | 2020-08-20 | 2021-11-02 | 中车齐齐哈尔车辆有限公司 | Vehicle body acceleration fatigue test method and method for acquiring driving signal thereof |
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| CN101476951A (en) | 2009-07-08 |
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