CN103452019A - Steel rail fastener longitudinal resistance testing device and method - Google Patents
Steel rail fastener longitudinal resistance testing device and method Download PDFInfo
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- CN103452019A CN103452019A CN2013104401552A CN201310440155A CN103452019A CN 103452019 A CN103452019 A CN 103452019A CN 2013104401552 A CN2013104401552 A CN 2013104401552A CN 201310440155 A CN201310440155 A CN 201310440155A CN 103452019 A CN103452019 A CN 103452019A
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Abstract
The invention relates to the field of rail construction, in particular to a steel rail fastener longitudinal resistance testing device and method. The device comprise a horizontal force applying device, a vertical force applying device, a displacement measuring device and a fixing device. The horizontal force applying device is used for applying a horizontal pushing force to one end of a steel rail. The vertical force applying device is used for applying vertical pressure to the steel rail. The displacement measuring device is used for measuring horizontal displacement, generated by the horizontal pushing force and the vertical pressure, of the steel rail. By the device high in accuracy, actual steel rail fastener longitudinal resistance of the steel rail under a load state (such as the load of a train) can be simulated and reflected.
Description
Technical field
The present invention relates to the orbit construction field, in particular to a kind of testing arrangement and method of rail fastening longitudinal resistance.
Background technology
The longitudinal resistance of rail fastening is an important indicator estimating rail fastening performance quality.In correlation technique, the method for common test rail fastening longitudinal resistance is all in the situation that the rail zero load is tested, and after first rail being fixed by rail fastening, applies external force at an end of rail, and measures the horizontal movement of rail.Then, obtain the longitudinal resistance of rail fastening by the relation between the horizontal movement of conversion external force and rail.
But, in correlation technique, because rail does not have load, and rail all carries train pressure in the process of work; Therefore, the longitudinal resistance of the rail fastening recorded in correlation technique can not be reacted rail fastening really has the longitudinal resistance under loading status at rail, and its accuracy is not high.
Summary of the invention
The object of the present invention is to provide a kind of testing arrangement and method of rail fastening longitudinal resistance, to solve the above problems.
The testing arrangement of the rail fastening longitudinal resistance provided in embodiments of the invention comprises horizontal force application apparatus, vertical force application apparatus, displacement measurement apparatus and fastening devices; Described horizontal force application apparatus applies horizontal thrust for the end to rail; Described vertical force application apparatus is for applying vertical pressure to rail; Described vertical force application apparatus comprises the first hydraulic jack, the first transverse slat, the second transverse slat; Described the first transverse slat is fixedly installed on described fastening devices, and described the second transverse slat is slidably arranged on described fastening devices; And described the first transverse slat and described the second transverse slat arrange from top to bottom; Described the first hydraulic jack is arranged between described the first transverse slat and described the second transverse slat and contacts with described the first transverse slat, the second transverse slat respectively; When described the second transverse slat slides up and down under the effect of described the first hydraulic jack, the space that can be formed for installing rail; The horizontal movement that described displacement measurement apparatus produces under having horizontal thrust and vertical pressure the time for measuring rail.
The method of utilizing the longitudinal resistance of testing arrangement test rail also is provided in embodiments of the invention, has comprised the following steps: use vertical force application apparatus to apply vertical pressure to the first predetermined value to rail; The usage level force application apparatus is continuously applied horizontal pressure force to the second predetermined value at a predetermined velocity to an end of rail; The horizontal movement that under the concrete pressure that utilizes displacement measurement apparatus test rail to apply at horizontal force application apparatus, described rail occurs; Record the horizontal movement that horizontal pressure force that described horizontal force application apparatus applies and rail occur, when described horizontal pressure force keeps constant, and described horizontal movement obtains longitudinal resistance while continuing to increase.
Testing arrangement and the method for the rail fastening longitudinal resistance of the above embodiment of the present invention, in the longitudinal resistance of test rail fastening, after rail is fixing, the second transverse slat contacts with the top of rail under the effect of the first hydraulic jack, and because the first transverse slat is fixedly connected with fastening devices, therefore, the first hydraulic jack can realize applying to rail by the second transverse slat with fastening devices slip setting the effect of vertical pressure; Horizontal force application apparatus can provide the horizontal thrust to rail, and the relation of the horizontal movement that the size by thrust and rail occur, can obtain the longitudinal resistance value of rail fastening when having vertical force application apparatus to apply vertical pressure; The testing arrangement of this rail fastening longitudinal resistance of the embodiment of the present invention, can apply to rail the longitudinal resistance that vertical vertical pressure is tested rail fastening afterwards by vertical force application apparatus.Therefore, can at loading status (for example well simulate rail, the train of load) the actual longitudinal resistance value of rail fastening, with traditional rail, in the longitudinal resistance that there is no rail fastening measured under the state of load, compare, can react really fastener has the longitudinal resistance under the lotus state at rail, and its accuracy is high.
The accompanying drawing explanation
Fig. 1 shows the schematic diagram of the testing arrangement of the rail fastening longitudinal resistance that the embodiment of the present invention one provides;
Fig. 2 shows the schematic diagram of the testing arrangement of the rail fastening longitudinal resistance that the embodiment of the present invention two provides.
The specific embodiment
Below by specific embodiment, also by reference to the accompanying drawings the present invention is described in further detail.
Please refer to Fig. 1, a kind of testing arrangement of rail fastening longitudinal resistance is provided in embodiments of the invention, comprise horizontal force application apparatus, vertical force application apparatus, displacement measurement apparatus 105 and fastening devices 104; Described horizontal force application apparatus applies horizontal thrust for the end to rail; Described vertical force application apparatus is for applying vertical pressure to rail; Described vertical force application apparatus comprises the first hydraulic jack 101, the first transverse slat 102, the second transverse slat 103; Described the first transverse slat 102 is fixedly installed on described fastening devices 104, and described the second transverse slat 103 is slidably arranged on described fastening devices 104; And described the first transverse slat 102 arranges from top to bottom with described the second transverse slat 103; Described the first hydraulic jack 101 is arranged between described the first transverse slat 102 and described the second transverse slat 103 and contacts with described the first transverse slat 102, the second transverse slat 103 respectively; When described the second transverse slat 103 slides up and down under the effect of described the first hydraulic jack 101, the space that can be formed for installing rail; The horizontal movement that described displacement measurement apparatus 105 produces under having horizontal thrust and vertical pressure the time for measuring rail.
The testing arrangement of a kind of rail fastening longitudinal resistance provided of the above embodiment of the present invention, in the longitudinal resistance of test rail fastening, after rail is fixing, the second transverse slat 103 contacts with the top of rail under the effect of the first hydraulic jack 101, and because the first transverse slat 102 is fixedly connected with fastening devices 104, therefore, the first hydraulic jack 101 can realize applying to rail by the second transverse slat 103 with fastening devices 104 slip settings the effect of vertical pressure; Horizontal force application apparatus can provide the horizontal thrust to rail, and the relation of the horizontal movement that the size by thrust and rail occur, can obtain the longitudinal resistance value of rail fastening when having vertical force application apparatus to apply vertical pressure; The testing arrangement of this rail fastening longitudinal resistance of the embodiment of the present invention, can apply to rail the longitudinal resistance that vertical vertical pressure is tested rail fastening afterwards by vertical force application apparatus.Therefore, can at loading status (for example well simulate rail, the train of load) the actual longitudinal resistance value of rail fastening, with traditional rail, in the longitudinal resistance that there is no rail fastening measured under the state of load, compare, can react really fastener has the longitudinal resistance under the lotus state at rail, and its accuracy is high.
For the testing arrangement of the rail fastening longitudinal resistance that makes the embodiment of the present invention one is better applied, more effectively be applied in the longitudinal resistance test of fastener, the present invention also provides embodiment bis-on the basis of above-described embodiment one, embodiment bis-is further restriction and increases of making on the basis to embodiment mono-, now is described in detail and explains:
Please refer to Fig. 2, in the present embodiment, for the longitudinal resistance convenient operation in test process that makes rail fastening, improve test accuracy, preferably, also comprise that described horizontal force application apparatus is the second hydraulic jack for fixedly gripper shoe 201 and the baffle plate 202 of rail; Described baffle plate 202 vertically is arranged on described gripper shoe 201, and an end and the described baffle plate 202 of described the second hydraulic jack offset; Like this, relative fixing between gripper shoe 201 and baffle plate 202, and rail also is fixed on gripper shoe 201, one end and the baffle plate 202 of the second hydraulic jack offset, the other end contacts with the end of rail, can well realize applying horizontal thrust to the rail be fixed on gripper shoe 201 by fastener.
In addition, optional, in the process of actual measurement, in order to make rail be easy to fix, can also between rail and gripper shoe 201, add backing plate, relatively fixing between backing plate, gripper shoe 201 and rail, in the process of repeated measurement, can change backing plate according to the damage degree of backing plate.
Further, in the present embodiment, the effect of fastening devices 104 is for vertical force application apparatus is fixed, and in order to reach better fixed effect, optional, described fastening devices 104 comprises the first fixed head 203 and the second fixed head 204; Described the first fixed head 203 and described the second fixed head 204 are symmetricly set on described gripper shoe 201, and described the first fixed head 203 is all vertical with described baffle plate 202 with described the second fixed head 204; And be provided with vertical protruding 205 on described the first fixed head 203 plate face relative with described the second fixed head 204; Described the first transverse slat 102 is fixedly installed on described the first fixed head 203 and described the second fixed head 204 end away from described gripper shoe 201; Described the second transverse slat 103 is provided with draw-in groove, and described the second transverse slat 103 is slidably connected with described the first fixed head 203 and described the second fixed head 204 respectively by described draw-in groove and described vertical protruding 205; Like this, the first transverse slat 102 and two fixed heads are fixedly installed, the second transverse slat 103 can be under the effect of the first hydraulic jack 101, under cooperation realization by draw-in groove and vertical projection 205, move up and down, rail is between the second transverse slat 103 and gripper shoe 201, and with the second transverse slat 103, contact, the vertical pressure that the first hydraulic jack 101 applies can act on rail by the second transverse slat 103.Symmetrically arranged the first fixed head 203 and the second fixed head 204 can well be fixing by the first transverse slat 102 and the second transverse slat 103, and an end of the second hydraulic jack is against on baffle plate 202, and an end in contact of the other end and rail also is continuously applied horizontal pressure force.
In order to ensure the safety in test process, preferred, described vertical force application apparatus also comprises at least two roller bearings 208; Described the first fixed head 203 and described the second fixed head 204 are respectively arranged with at least two the first through holes 206 and at least two the second through holes 207 at its thickness direction, and the hole heart of at least two described the first through holes 206 equates to the distance of described gripper shoe 201, and equals the distance of the hole heart of at least two described the second through holes 207 to described gripper shoe 201; At least two described roller bearings 208 be arranged in parallel, and its two ends are successively through described the first through hole 206 and described the second through hole 207; Like this, the second transverse slat 103 loads are at least two roller bearings 208, on the one hand, improved the stability of the second transverse slat 103, on the other hand, the suffered pressure of the second transverse slat 103 is delivered on rail by roller bearing 208, and roller bearing 208 plays dividing potential drop and simulates the state that train is advanced, therefore, can improve the accuracy of test result.
Preferably, described displacement measurement apparatus 105 is dial gage; Described dial gage is at least two, by dial gage, can measure accurately the micro-displacement that rail occurs under horizontal thrust, and, in order to measure accurately displacement, dial gage is at least two, and it can be separately positioned on rail head, the web of the rail and the flange of rail section of rail; In addition, in the present embodiment, optional, the horizontal movement that rail occurs can directly be measured by displacement transducer.
In the present embodiment, in order to improve the stability of the second transverse slat 103 in sliding process, preferably, described draw-in groove and described vertical protruding 205 is a plurality of, and each described draw-in groove all corresponding one described vertical protruding 205 and with described vertical protruding 205 be slidably matched.
In order better to simulate the state that rail bears the train of advancing, in the present embodiment, further, also comprise a plurality of bearings 209; Be provided with at least two described bearings 209 on each described roller bearing 208, and block for the rail head by rail; The second hydraulic jack withstands in the process of persistent pressure, and roller bearing 208 and bearing 209 are easy to and rail generation relative sliding.Preferably, want coating lubricating oil in the contact site of bearing 209 and roller bearing 208 and the contact site of roller bearing 208 and rail.
Further, in the process of test, in order to make being fixed on gripper shoe 201 that the first fixed head 203 and the second fixed head 204 can be firm, preferred, also comprise the first reinforcing rib 210 and the second reinforcing rib 211; Described the first reinforcing rib 210 is arranged between described the first fixed head 203 and described gripper shoe 201, described the second reinforcing rib 211 is arranged between described the second fixed head 204 and described gripper shoe 201, and the first reinforcing rib 210 and the second reinforcing rib 211 can also be set to a plurality of.
In addition, in the present embodiment, also comprise a plurality of support battens; A plurality of described support battens are arranged on the bottom of described gripper shoe 201, and described gripper shoe 201 is propped up, and a plurality of described support battens are parallel to each other, support batten 212 whole gripper shoe 201 is supported, and then make in the process of test convenient operation more.
The embodiment of the present invention three also provides a kind of method of testing the rail fastening longitudinal resistance, specifically comprises the following steps:
Step 101: use vertical force application apparatus to apply vertical pressure to the first predetermined value to rail;
Step 102: the usage level force application apparatus is continuously applied horizontal pressure force to the second predetermined value at a predetermined velocity to an end of rail;
Step 103: the horizontal movement that under the concrete pressure that utilizes displacement measurement apparatus 105 test rail to apply at horizontal force application apparatus, described rail occurs;
Step 104: record the horizontal movement that horizontal pressure force that described horizontal force application apparatus applies and rail occur, when described horizontal pressure force keeps constant, and described horizontal movement obtains longitudinal resistance while continuing to increase.
Preferably, in above-mentioned steps, wherein, described the first predetermined value is 80kN or 110kN; Described predetermined speed is 5kN/min-15kN/min; Described the second predetermined value is 2.2kN-2.8kN.
In the above-described embodiments, optional, rail fastening can comprise V-type fastener (comprising small-resistant fastener), WJ-7, WJ-8 series etc.; Wherein, the V-type fastener can adopt LWS series matching fastener, and the spring model is X3, and the apron block model is C5-4, and the railway rail pad model is RP5-08; WJ-7 type fastener comprises two types of normal resistance and slight drags; The normal resistance fastener of WJ-8 type adopts rubber mat plate, W1 type spring.
Simultaneously, it is pointed out that in an embodiment of the present invention, various different types of rail fastenings are carried out in the process of longitudinal resistance test, can select a plurality of rail fastenings of the same type to do repeated experiments, and then obtain average longitudinal resistance (kN) and average length travel (mm).
1,6 cover V-type small-resistant fasteners are tested:
1), when rail does not apply vertical pressure by vertical force application apparatus, the longitudinal resistance result of rail V-type small-resistant fastener is referring to table 1:
Rail V-type small-resistant fastener longitudinal resistance experimental data when table 1 is unloaded
2), when rail applies the 80kN vertical pressure by vertical force application apparatus, the longitudinal resistance result of rail V-type small-resistant fastener is referring to table 2:
Longitudinal resistance result of the test during table 2V type small-resistant fastener load 80kN vertical pressure
3), when rail applies the 110kN vertical pressure by vertical force application apparatus, the longitudinal resistance result of rail V-type small-resistant fastener is referring to table 3:
Longitudinal resistance result of the test during table 3V type small-resistant fastener load 110kN vertical pressure
The longitudinal resistance analysis of table 4V type small-resistant fastener when different load
| Vertical load (kN) | Unloaded | 80 | 110 |
| Longitudinal resistance value (kN) | 5.114 | 15.881 | 23.632 |
| The coefficient of friction resistance | __ | 0.20 | 0.21 |
| With no-load resistance ratio | —— | 3.105 | 4.621 |
Please refer to Fig. 4, test result shows, when lotus is arranged, the longitudinal resistance of V-type small-resistant fastener increases with the increase of vertical load; It is without more than 2 times of lotus resistance that the lotus resistance is arranged; When lotus is arranged between the about 0.20-0.21 of the coefficient of friction resistance of fastener.
2,7 cover WJ-7 type small-resistant fasteners are tested:
1), when rail does not apply vertical pressure by vertical force application apparatus, the longitudinal resistance result of rail WJ-7 type small-resistant fastener is referring to table 5.
Rail WJ-7 type slight drag longitudinal resistance experimental data when table 5 is unloaded
2), when rail applies the 80kN vertical pressure by vertical force application apparatus, the longitudinal resistance result of rail WJ-7 type small-resistant fastener is referring to table 6:
Longitudinal resistance result of the test during table 6WJ-7 type slight drag load 80kN vertical pressure
3), when rail applies the 110kN vertical pressure by vertical force application apparatus, the longitudinal resistance result of rail WJ-7 type fastener is referring to table 7.
Longitudinal resistance result of the test during table 7WJ-7 type small-resistant fastener load 110kN vertical pressure
The longitudinal resistance analysis of table 8WJ-7 type small-resistant fastener when different load
| Vertical load (kN) | No-load | 80 | 110 |
| Longitudinal resistance value (kN) | 6.684 | 16.727 | 24.218 |
| The coefficient of friction resistance | —— | 0.21 | 0.22 |
| With no-load resistance ratio | —— | 2.503 | 3.623 |
Please refer to table 8, test shows, when lotus is arranged, the longitudinal resistance of WJ-7 type small-resistant fastener increases with the increase of vertical load; It is without more than 2 times of lotus resistance that the lotus resistance is arranged; When lotus is arranged between the about 0.21-0.22 of the coefficient of friction resistance of fastener, the fastener longitudinal resistance in the time of can estimating different vertical load action accordingly.
3, the normal resistance fastener of 8 cover WJ-7 type is tested:
1), when rail does not apply vertical pressure by vertical force application apparatus, the longitudinal resistance result of rail fastening is referring to table 9:
The normal resistance fastener of rail WJ-7 type longitudinal resistance experimental data when table 9 is unloaded
2), when rail applies the 50kN vertical pressure by vertical force application apparatus, the longitudinal resistance result of the normal resistance fastener of rail WJ-7 type is referring to table 10:
Longitudinal resistance result of the test during the normal resistance load 50kN vertical pressure of table 10WJ-7 type
The longitudinal resistance analysis of the table normal resistance fastener of 11WJ-7 type when different load
| Vertical load (kN) | No-load | 50 |
| Longitudinal resistance value (kN) | 18.698 | 34.613 |
| The coefficient of friction resistance | —— | 0.69 |
| With no-load resistance ratio | —— | 1.851 |
Normal resistance fastener is when the vertical load of 50kN, and the coefficient of friction resistance is 0.69; Longitudinal resistance is 1.85 times without the lotus resistance.
4, the normal resistance fastener of 5 cover WJ-8 type is tested:
1), when rail does not apply vertical pressure by vertical force application apparatus, the longitudinal resistance result of rail fastening is referring to table 12:
The normal resistance fastener of rail WJ-8 type longitudinal resistance experimental data when table 12 is unloaded
2), when rail applies the 50kN vertical pressure by vertical force application apparatus, the longitudinal resistance result of the normal resistance fastener of rail WJ-8 type is referring to table 13:
Longitudinal resistance result of the test during the normal resistance load 50kN vertical pressure of table 13WJ-8 type
The longitudinal resistance analysis of the table normal resistance fastener of 14WJ-8 type when different load
| Vertical load (kN) | No-load | 50 |
| Longitudinal resistance value (kN) | 13.130 | 25.190 |
| The coefficient of friction resistance | —— | 0.50 |
| With no-load resistance ratio | —— | 1.919 |
Please refer to table 14, the normal resistance fastener of WJ-8 is when the vertical load of 50kN, and the coefficient of friction resistance is 0.50; Longitudinal resistance is 1.91 times without the lotus resistance.
Through above-mentioned test determination, V-type small-resistant fastener, WJ-7 slight drag and normal resistance fastener, the longitudinal resistance value of the normal resistance fastener of WJ-8 without lotus and various different load the time are as following table:
Each rail fastening longitudinal resistance test value summary sheet of table 15
Comprehensive above-mentioned test result can obtain as drawn a conclusion:
(1) having lotus to do the used time, the longitudinal resistance of each rail fastening significantly improves, and closely related with the size of vertical load.
(2) the V-type small-resistant fastener has the lotus resistance coefficient of friction resistance to be about 0.20-0.21, the fastener longitudinal resistance in the time of can calculating different vertical load action accordingly; Press the vertical load of 80kN and consider, the V-type fastener have the lotus resistance be during without lotus more than 3 times.
(3) the WJ-7 small-resistant fastener has the lotus resistance coefficient of friction resistance to be about 0.21-0.22, the fastener longitudinal resistance in the time of can calculating different vertical load action accordingly; Press the vertical load of 80kN and consider, the V-type fastener have the lotus resistance be during without lotus more than 2.5 times.
(4) the normal resistance fastener of the WJ-7 coefficient of friction resistance approximately 0.69, the fastener longitudinal resistance in the time of can calculating different vertical load action accordingly; Press the vertical load of 50kN and consider, the V-type fastener have the lotus resistance be during without lotus more than 1.8 times.
(5) the normal resistance fastener of the WJ-8 coefficient of friction resistance approximately 0.50, the fastener longitudinal resistance in the time of can calculating different vertical load action accordingly; Press the vertical load of 50kN and consider, the V-type fastener have the lotus resistance be during without lotus more than 1.9 times.
Therefore, by above-mentioned experimental result, can find out, different types of rail fastening is not in the situation that there is no load and load has different vertical pressures (vertical load), and the longitudinal resistance of fastener is different.The testing arrangement of this rail fastening longitudinal resistance that the present embodiment provides and method can be simulated the longitudinal load of rail rail fastening when having load, with traditional rail, in the longitudinal resistance that there is no rail fastening measured under the state of load, compare, can react really fastener has the longitudinal resistance under the lotus state at rail, and its accuracy is high.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the testing arrangement of rail fastening longitudinal resistance, is characterized in that, comprises horizontal force application apparatus, vertical force application apparatus, displacement measurement apparatus and fastening devices;
Described horizontal force application apparatus applies horizontal thrust for the end to rail;
Described vertical force application apparatus is for applying vertical pressure to rail;
Described vertical force application apparatus comprises the first hydraulic jack, the first transverse slat, the second transverse slat;
Described the first transverse slat is fixedly installed on described fastening devices, and described the second transverse slat is slidably arranged on described fastening devices; And described the first transverse slat and described the second transverse slat arrange from top to bottom; Described the first hydraulic jack is arranged between described the first transverse slat and described the second transverse slat and contacts with described the first transverse slat, the second transverse slat respectively; When described the second transverse slat slides up and down under the effect of described the first hydraulic jack, the space that can be formed for installing rail;
The horizontal movement that described displacement measurement apparatus produces under having horizontal thrust and vertical pressure the time for measuring rail.
2. the testing arrangement of rail fastening longitudinal resistance according to claim 1, is characterized in that, also comprises that described horizontal force application apparatus is the second hydraulic jack for fixedly gripper shoe and the baffle plate of rail;
Described baffle plate vertically is arranged on described gripper shoe, and an end and the described baffle plate of described the second hydraulic jack offset.
3. the testing arrangement of rail fastening longitudinal resistance according to claim 2, is characterized in that, described fastening devices comprises the first fixed head and the second fixed head;
Described the first fixed head and described the second fixed head are symmetricly set on described gripper shoe, and described the first fixed head is all vertical with described baffle plate with described the second fixed head; And be provided with vertical projection on described the first fixed head plate face relative with described the second fixed head;
Described the first transverse slat is fixedly installed on described the first fixed head and described the second fixed head end away from described gripper shoe; Described the second transverse slat is provided with draw-in groove, and described the second transverse slat is slidably connected with described the first fixed head and described the second fixed head respectively by described draw-in groove and described vertical projection.
4. the testing arrangement of rail fastening longitudinal resistance according to claim 3, is characterized in that, described vertical force application apparatus also comprises at least two roller bearings;
Described the first fixed head and described the second fixed head are respectively arranged with at least two the first through holes and at least two the second through holes at its thickness direction, and the hole heart of at least two described the first through holes equates to the distance of described gripper shoe, and equals the distance of the hole heart of at least two described the second through holes to described gripper shoe;
At least two described roller bearings be arranged in parallel, and its two ends are successively through described the first through hole and described the second through hole.
5. the testing arrangement of rail fastening longitudinal resistance according to claim 4, is characterized in that, also comprises a plurality of bearings;
Be provided with at least two described bearings on each described roller bearing, and block for the rail head by rail.
6. the testing arrangement of rail fastening longitudinal resistance according to claim 1, is characterized in that, described displacement measurement apparatus is dial gage;
Described dial gage is at least two.
7. the testing arrangement of rail fastening longitudinal resistance according to claim 5, is characterized in that, described draw-in groove and described vertical projection are a plurality of, and the equal corresponding described vertical projection being slidably matched with described vertical projection of each described draw-in groove.
8. the testing arrangement of rail fastening longitudinal resistance according to claim 7, is characterized in that, also comprises the first reinforcing rib and the second reinforcing rib;
Described the first reinforcing rib is arranged between described the first fixed head and described gripper shoe, and described the second reinforcing rib is arranged between described the second fixed head and described gripper shoe.
9. the testing arrangement of rail fastening longitudinal resistance according to claim 2, is characterized in that, also comprises a plurality of support battens;
A plurality of described support battens are arranged on the bottom of described gripper shoe, and described gripper shoe is propped up, and a plurality of described support batten is parallel to each other.
10. a method of utilizing the longitudinal resistance of the described testing arrangement test of claim 1-9 any one rail fastening, is characterized in that, comprises the following steps:
Use vertical force application apparatus to apply vertical pressure to the first predetermined value to rail;
The usage level force application apparatus is continuously applied horizontal pressure force to the second predetermined value at a predetermined velocity to an end of rail;
The horizontal movement that under the concrete pressure that utilizes displacement measurement apparatus test rail to apply at horizontal force application apparatus, described rail occurs;
Record the horizontal movement that horizontal pressure force that described horizontal force application apparatus applies and rail occur, when described horizontal pressure force keeps constant, and described horizontal movement obtains longitudinal resistance while continuing to increase.
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| CN106644425A (en) * | 2016-10-27 | 2017-05-10 | 中南大学 | Integrated measuring device for resistances in longitudinal, transverse and vertical directions of steel rail fastener |
| CN107036883A (en) * | 2017-05-15 | 2017-08-11 | 西南交通大学 | Ballast longitudinal resistance Hysteresis Behavior test model sets up device, method and system |
| CN107121275A (en) * | 2017-06-13 | 2017-09-01 | 石家庄铁道大学 | Rail fastening integration test experimental facilities |
| CN108458863A (en) * | 2018-03-22 | 2018-08-28 | 中南大学 | The longitudinally reciprocal loading simulation experimental provision of track |
| CN109468900A (en) * | 2019-01-02 | 2019-03-15 | 中南大学 | A kind of rail joint, interval iron, limiter longitudinal resistance comprehensive measurement device |
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