CN209927477U - Novel axle fatigue test bed - Google Patents
Novel axle fatigue test bed Download PDFInfo
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- CN209927477U CN209927477U CN201920630527.0U CN201920630527U CN209927477U CN 209927477 U CN209927477 U CN 209927477U CN 201920630527 U CN201920630527 U CN 201920630527U CN 209927477 U CN209927477 U CN 209927477U
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Abstract
A novel axle fatigue test bed relates to the technical field of railway rolling stock tests. The device comprises a base, rail wheels, an experimental wheel pair fixer, a first actuator and a second actuator. The rail wheel is rotatably arranged on the base and driven by the driver, and the rail wheel is provided with a matching part for bearing the wheel pair to be detected and matching with the wheel pair to be detected. The experimental wheel pair fixer is erected on the base and is provided with an installation part for installing the tested wheel pair. The first actuator is arranged in the vertical direction and located above the experimental wheel pair fixing device so as to apply vertical load to the tested wheel pair installed on the experimental wheel pair fixing device. The second actuators are arranged in the horizontal direction and are respectively arranged on two sides of the experimental wheel pair fixing device, and the second actuators are arranged in the direction perpendicular to the rotating axis of the measured wheel pair so as to apply steering force to the measured wheel pair. The method improves the accuracy of load transfer, can more accurately reflect the real load effect, and has more accurate and reliable fatigue test result.
Description
Technical Field
The utility model relates to a railway rolling stock tests technical field particularly, relates to a novel axletree fatigue test platform.
Background
The inventor of the present application has found that: the existing axle fatigue test bed restrains partial freedom degree in the measuring process, so that the transmission of load is inconsistent with the actual situation, and the effect of reflecting the real load is not achieved.
In view of this, the present application is specifically made.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel axletree fatigue test platform, it has improved the accuracy of load transmission greatly, can reflect true load effect more accurately, and fatigue test's result is more accurate reliable.
The embodiment of the utility model is realized like this:
a novel axle fatigue test stand, comprising: base, rail wheel, experiment wheel pair fixer, first actuator and second actuator. The rail wheel is rotatably arranged on the base and driven by the driver, and the rail wheel is provided with a matching part for bearing the wheel pair to be detected and matching with the wheel pair to be detected. The experimental wheel pair fixer is erected on the base and is provided with an installation part for installing the tested wheel pair. The first actuator is arranged in the vertical direction and located above the experimental wheel pair fixing device so as to apply vertical load to the tested wheel pair installed on the experimental wheel pair fixing device. The second actuators are arranged in the horizontal direction and are respectively arranged on two sides of the experimental wheel pair fixing device, and the second actuators are arranged in the direction perpendicular to the rotating axis of the measured wheel pair so as to apply steering force to the measured wheel pair.
Further, the axle fatigue test stand further comprises a third actuator. The third actuator is arranged along the horizontal direction and the third actuator is arranged along the axial direction of the rotating shaft of the measured wheel pair. The loading end of the third actuator is connected with the experimental wheel pair fixer for applying transverse load to the tested wheel pair.
Further, the base erects the stand, and the stand is connected with first crossbeam and second crossbeam. The bearing end of the first actuator is connected to the first beam and the bearing end of the second actuator is connected to the second beam. The experimental wheel pair fixer is erected above the track wheel by a first actuator, a second actuator and a third actuator.
Further, the experiment wheel pair fixer comprises two first shaft seats and a connecting rod, wherein the two first shaft seats are arranged at intervals and connected through the connecting rod, and at least one of the two first shaft seats is matched with the connecting rod in a sliding mode. The rotating shaft of the track wheel comprises a driving shaft and a driven shaft, the driving shaft and the driven shaft are matched with the track wheel, and the driving shaft and the driven shaft are in transmission connection through a spline coupler. The driving shaft and the driven shaft are respectively arranged on the base through a second shaft seat. At least one of the two second shaft mounts is slidably engaged with the base in an axial direction of the rail wheel.
Further, the load bearing end of the first actuator is slidably engaged with the first beam along the length of the first beam. The load bearing end of the second actuator is slidably engaged with the second beam along the length of the second beam.
Further, the first shaft base comprises a shaft base body, a shaft box, a first rod body and a second rod body. One end of the first rod body is hinged to the axle seat body, and the other end of the first rod body is fixedly connected with the axle box. One end of the second rod body is hinged to the top of the shaft seat body, and the other end of the second rod body extends downwards and is hinged to the shaft box. The axle box is connected with the top of the axle seat body in a butt joint mode through an elastic piece, and the second rod body is a shock absorber.
Further, the fitting portion includes a first flange and a second flange, and the first flange and the second flange are both arranged continuously in a ring shape along a circumferential direction of the tread of the rail wheel. The first flange and the second flange are spaced apart in the axial direction of the rail wheel. Wherein the profile of the first flange is the same as the profile of the rail face.
Furthermore, the first flange, the second flange and the wheel surface of the rail wheel enclose a U-shaped groove, and the groove width of the U-shaped groove is larger than the thickness of the wheel rim of the wheel pair to be measured.
Further, the base is provided with a boss, and the bearing end of the third actuator is connected with the boss.
The embodiment of the utility model provides a beneficial effect is:
the embodiment of the utility model provides a novel axletree fatigue test platform is carrying out fatigue test's in-process, will be surveyed the wheel pair and install in experiment wheel pair fixer, makes the wheel face of being surveyed the wheel pair cooperate with the wheel face of rail wheel to keep being surveyed the wheel pair and lie in the rail wheel directly over, thereby guarantee to be surveyed the wheel pair and can accurately receive vertical load. The driver is used for driving the rail wheel, so that the tested wheel pair can be indirectly rotated, and the test is started. And applying vertical load to the tested wheel pair by using the first actuator in the test process. Meanwhile, according to the requirement, one of the two second actuators can be used for providing pulling force, and the other actuator can be used for providing pushing force, so that steering force is provided for the measured wheel pair, and the purpose of simulating the turning scene of the measured wheel pair in the actual operation process is achieved. Therefore, the actual fatigue condition of the measured wheel pair in the running process is truly reflected.
Through the design, the fatigue data under the 'turning' scene is introduced by utilizing the second actuator, so that the fitness of the whole test environment and the actual operation environment is higher, and the real fatigue condition and the test data of the tested wheel pair at the position can be more accurately reflected. Generally, the embodiment of the utility model provides a novel axletree fatigue test platform has improved the accuracy of load transmission greatly, can reflect true load effect more accurately, and fatigue test's result is more accurate reliable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of an axle fatigue test stand provided by an embodiment of the present invention;
FIG. 2 is a schematic structural view of the axle fatigue test stand shown in FIG. 1 with the bosses, part of the columns, the longitudinal beams, the first cross beams and part of the second cross beams removed;
FIG. 3 is a schematic view of the axle fatigue test stand of FIG. 2 from another perspective with the drive removed;
FIG. 4 is an enlarged view of area A of FIG. 2;
fig. 5 is an enlarged view of the region B in fig. 4.
Icon: axle fatigue test stand 1000; a base 100; a column 110; a stringer 120; a first cross member 130; a second cross member 140; a boss 150; a rail wheel 200; a drive shaft 210; a driven shaft 220; a spline coupling 230; a second shaft base 240; a first flange 250; a second flange 260; the experimental wheel set holder 300; a first hub 310; a shaft seat body 311; an axle box 312; a first lever 313; a second stick 314; an elastic member 315; a connecting rod 320; a first actuator 400; a second actuator 500; a third actuator 600; a driver 700; a gear case 710; the wheel pair 800 is measured.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1 to 3, the present embodiment provides a novel axle fatigue testing stand 1000. The axle fatigue test stand 1000 includes: the test wheel pair fixing device comprises a base 100, a rail wheel 200, a test wheel pair fixing device 300, a first actuator 400 and a second actuator 500.
The rail wheel 200 is rotatably provided on the base 100 and driven by the driver 700, and the rail wheel 200 has an engaging portion for carrying the wheel pair 800 to be measured and for engaging with the wheel pair 800 to be measured. The test wheel pair holder 300 is mounted on the base 100 and has a mounting portion for mounting the wheel pair 800 to be tested.
The first actuator 400 is disposed in a vertical direction and above the test wheel pair holder 300, so as to apply a vertical load to the measured wheel pair 800 mounted on the test wheel pair holder 300. The second actuators 500 are arranged along the horizontal direction and are respectively arranged at two sides of the experimental wheel pair fixer 300, and the second actuators 500 are arranged along the direction perpendicular to the rotating axis of the measured wheel pair 800 so as to apply steering force to the measured wheel pair 800.
In the process of performing the fatigue test, the measured wheel pair 800 is mounted on the experimental wheel pair holder 300, so that the wheel surface of the measured wheel pair 800 is matched with the wheel surface of the rail wheel 200, and the measured wheel pair 800 is kept right above the rail wheel 200, thereby ensuring that the measured wheel pair 800 can accurately receive the vertical load. The driver 700 is used to drive the rail wheel 200, so that the tested wheel pair 800 can be indirectly rotated, and the test can be started. During the test, the first actuator 400 is used to apply a vertical load to the wheel pair 800 under test. Meanwhile, according to the requirement, one of the two second actuators 500 can be used for providing a pulling force, and the other one of the two second actuators can be used for providing a pushing force, so that a steering force is provided for the measured wheel pair 800, and the purpose of simulating the turning scene of the measured wheel pair 800 in the actual running process is achieved. Thereby truly reflecting the actual fatigue condition of the measured wheel pair 800 in the operation process.
Through the design, the fatigue data under the 'turning' scene is introduced by utilizing the second actuator 500, so that the fitness of the whole testing environment and the actual running environment is higher, and the fatigue condition and the testing data of the tested wheel pair 800 can be reflected more accurately. In general, the axle fatigue test bed 1000 greatly improves the accuracy of load transfer, can more accurately reflect the real load effect, and the result of fatigue test is more accurate and reliable.
In the present embodiment, the base 100 has a flat plate shape, and the base 100 is provided with the vertical column 110, the longitudinal beam 120, the first cross member 130, and the second cross member 140. Specifically, four vertical columns 110, two longitudinal beams 120, one first cross beam 130, and two second cross beams 140 are provided. Four upright posts 110 are respectively arranged at four corners of the base 100, the longitudinal beams 120 are arranged at the top ends of the upright posts 110, and the two longitudinal beams 120 are arranged at intervals and are respectively connected between the two upright posts 110. The first cross member 130 is connected between the two longitudinal members 120, the second cross members 140 are respectively disposed at both sides and are respectively connected between the two vertical members 110, and the second cross members 140 are located between the longitudinal members 120 and the base 100.
The bearing end of the first actuator 400 is connected to the first beam 130, the loading end of the first actuator 400 is connected to the experimental wheel pair holder 300, the first actuators 400 are divided into two groups, and the two groups of the first actuators 400 are respectively disposed at two ends of the first beam 130. The bearing end of the second actuator 500 is connected to the second beam 140, the loading end of the second actuator 500 is connected to the experimental wheel pair holder 300, the number of the second actuators 500 is two, and the two sets of the second actuators 500 are respectively arranged at two ends of the second beam 140.
The axle fatigue test stand 1000 further includes a third actuator 600, and the base 100 is further provided with a boss 150, the boss 150 being formed by an upper surface projection of the base 100. The third actuator 600 is disposed in a horizontal direction and the third actuator 600 is disposed in an axial direction of the rotation shaft of the wheel pair 800 to be measured. The loading end of the third actuator 600 is connected to the test wheel pair holder 300 for applying a lateral load to the wheel pair 800 under test. The load bearing end of the third actuator 600 is attached to the boss 150 and the load end of the third actuator 600 is attached to the side of the test wheel set holder 300.
In other words, the experimental wheel set fixer 300 is supported by three of the first actuator 400, the second actuator 500 and the third actuator 600, and is erected above the rail wheel 200 by the first actuator 400, the second actuator 500 and the third actuator 600.
Through the design, the experimental wheel pair fixer 300 is provided with the supporting force by the first actuator 400, the second actuator 500 and the third actuator 600, so that the experimental wheel pair fixer 300 has certain mobility, the rigidity is not so strong, the loads in the corresponding directions can be smoothly generated under the action of the first actuator 400, the second actuator 500 and the third actuator 600, the interference caused by other parts is very small, the interference factors are further weakened, the authenticity and the accuracy of load simulation are improved, and the test result is closer to the condition of real operation. In addition, the third actuator 600 is introduced, and a transverse load is also inevitably introduced in the actual straight-ahead process, so that the fitting degree of the simulation scene and the real situation is further improved.
Further, the test wheel pair holder 300 includes two first axle seats 310 and two connecting rods 320, the two first axle seats 310 are spaced apart and connected by the connecting rod 320, the number of the connecting rods 320 is two, and the two connecting rods 320 are spaced apart. At least one of the two first shaft seats 310 is slidably engaged with the connecting rod 320, and in the present embodiment, only one first shaft seat 310 is slidably engaged with the connecting rod 320.
The rotating shaft of the track wheel 200 comprises a driving shaft 210 and a driven shaft 220, the driving shaft 210 and the driven shaft 220 are both matched with the track wheel 200, and the driving shaft 210 and the driven shaft 220 are in transmission connection through a spline coupler 230. The driving shaft 210 and the driven shaft 220 are respectively mounted to the base 100 by a second shaft mount 240. At least one of the two second shaft seats 240 is slidably fitted to the base 100 in the axial direction of the rail wheel 200. In this embodiment, only one second shaft seat 240 is slidably engaged with the base 100.
Accordingly, the load bearing end of the first actuator 400 is slidably engaged with the first beam 130 along the length of the first beam 130. The load bearing end of the second actuator 500 is slidably engaged with the second beam 140 along the length of the second beam 140.
Through the design, the distance between the two second shaft seats 240, the distance between the two first shaft seats 310, the distance between the two groups of first actuators 400 and the distance between the two groups of second actuators 500 can be adjusted to adapt to the fatigue test of the tested wheel pairs 800 with different gauges, so that the application range of the axle fatigue test stand 1000 is greatly expanded, and the axle fatigue test stand is more suitable for the test work of the current wheel pairs with variable gauges.
It should be noted that, after the above-mentioned distance adjustment is completed, the locking elements may be used to lock the various components, so that the axle fatigue test stand 1000 can perform the fatigue test under the specific track gauge condition. In this embodiment, the locking member is a screw rod, but is not limited thereto, and in other embodiments of the present invention, the locking member may also be a mechanical clamp, a screw rod mechanism (which can simultaneously achieve position adjustment and positioning), and the like.
Further, referring to fig. 4, the first shaft seat 310 includes a shaft seat body 311, a shaft housing 312, a first rod 313 and a second rod 314. One end of the first rod 313 is hinged to the axle seat body 311, and the other end is fixedly connected to the axle box 312, and the axle box 312 is located at the middle position between the two connecting rods 320. The second rod 314 has one end hinged to the top of the axle seat body 311 and the other end extending downward and hinged to the axle box 312. The axle housing 312 is abutted with the elastic member 315 at the top of the axle housing body 311, and the second rod 314 is a shock absorber. Wherein, the elastic member 315 is a column spring.
Through the design, when the first actuator 400 is used for applying vertical load, the first shaft seat 310 has a certain buffering function, the principle of the first shaft seat is the same as that of a damping device of a train, the damping function of the train is simulated, and the stress and load change conditions of the tested wheel pair 800 in the actual operation process are reflected more truly, so that the testing accuracy and the testing reality degree are further improved.
In the present embodiment, referring to fig. 5, the fitting portion includes a first flange 250 and a second flange 260, and the first flange 250 and the second flange 260 are both continuously disposed in a ring shape along the circumferential direction of the tread surface of the rail wheel 200. First flange 250 and second flange 260 are spaced apart in the axial direction of orbital wheel 200. Wherein the first flange 250 has the same profile as the rail face. And the first flange 250, the second flange 260 and the wheel surface of the rail wheel 200 enclose a U-shaped groove, and the groove width of the U-shaped groove is larger than the thickness of the wheel rim of the measured wheel pair 800. Through the design, the U-shaped groove not only provides a displacement space for the transverse displacement of the tested wheel pair 800, but also further reduces the interference of the second flange 260 on the tested wheel pair 800 by the smooth groove wall of the U-shaped groove, and further improves the testing accuracy.
In this embodiment, the driver 700 is a motor, the power output part of the driver 700 is further provided with a gear box 710, and the power output part of the gear box 710 is in transmission connection with the rail wheel 200.
Specifically, in this embodiment, the first actuator 400, the second actuator 500, and the third actuator 600 are all double ball-joint hydraulic actuators.
In conclusion, the novel axle fatigue test bed 1000 greatly improves the accuracy of load transmission, and simultaneously simulates the vertical load, the horizontal load, the turning and the shock absorption of the tested wheel pair 800 in the actual operation process, so that the real load effect can be more accurately reflected, and the result of the fatigue test is more accurate and reliable. In addition, in the whole test process, the rail wheel 200 cannot generate displacement, and all loads are realized through the movement trend of the tested wheel pair 800 relative to the rail wheel 200, which is the same as the situation in the actual operation process, so that the authenticity and the recovery degree of the test are further improved. On the other hand, the novel axle fatigue test bed 1000 can also be used for fatigue test of axles with variable track gauges, and the application range is further expanded.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A novel axle fatigue test stand is characterized by comprising: the device comprises a base, a track wheel, an experimental wheel pair fixer, a first actuator and a second actuator;
the rail wheel is rotatably arranged on the base and driven by the driver, and is provided with a matching part for bearing a wheel pair to be measured and matching with the wheel pair to be measured; the experimental wheel set fixer is erected on the base and is provided with an installation part for installing the measured wheel set;
the first actuator is arranged along the vertical direction and is positioned above the experimental wheel pair fixer so as to apply vertical load to the tested wheel pair arranged on the experimental wheel pair fixer;
the second actuators are arranged in the horizontal direction and are respectively arranged on two sides of the experimental wheel pair fixing device, and the second actuators are arranged in the direction perpendicular to the rotating axis of the measured wheel pair so as to apply steering force to the measured wheel pair.
2. The axle fatigue test stand of claim 1, further comprising a third actuator; the third actuator is arranged along the horizontal direction and is arranged along the axial direction of the rotating shaft of the wheel pair to be measured; and the loading end of the third actuator is connected with the experimental wheel pair fixer so as to apply transverse load to the tested wheel pair.
3. The axle fatigue test stand of claim 2, wherein the base frame has a column to which a first beam and a second beam are connected; the bearing end of the first actuator is connected to the first cross beam, and the bearing end of the second actuator is connected to the second cross beam; the experimental wheel pair fixer is erected above the rail wheel by the first actuator, the second actuator and the third actuator.
4. The axle fatigue test stand of claim 3, wherein the test wheel set holder comprises two first axle seats and a connecting rod, the two first axle seats being spaced apart and connected by the connecting rod, at least one of the two first axle seats being slidably engaged with the connecting rod;
the rotating shaft of the track wheel comprises a driving shaft and a driven shaft, the driving shaft and the driven shaft are matched with the track wheel, and the driving shaft and the driven shaft are in transmission connection through a spline coupler; the driving shaft and the driven shaft are respectively arranged on the base through a second shaft seat; at least one of the two second shaft mounts is slidably engaged with the base in an axial direction of the rail wheel.
5. The axle fatigue test stand of claim 4, wherein a load-bearing end of the first actuator is slidably engaged with the first cross member along a length of the first cross member; the load bearing end of the second actuator is slidably engaged with the second beam along the length of the second beam.
6. The axle fatigue test stand of claim 4, wherein the first axle seat comprises an axle seat body, an axle housing, a first rod, and a second rod; one end of the first rod body is hinged to the axle seat body, and the other end of the first rod body is fixedly connected with the axle box; one end of the second rod body is hinged to the top of the shaft seat body, and the other end of the second rod body extends downwards and is hinged to the shaft box; an elastic part is abutted between the axle box and the top of the axle seat body, and the second rod body is a shock absorber.
7. The axle fatigue test stand of claim 1, wherein the fitting portion includes a first flange and a second flange, each of which is provided continuously in a ring shape in a circumferential direction of a tread of the rail wheel; the first flange and the second flange are arranged at intervals along the axial direction of the rail wheel; wherein the first flange has a profile which is the same as the profile of the rail face.
8. The axle fatigue test stand of claim 7, wherein the first flange, the second flange, and the tread of the rail wheel define a U-shaped groove having a groove width greater than a thickness of the rim of the wheel pair under test.
9. An axle fatigue test stand according to claim 2, wherein the base is provided with a boss to which a load bearing end of the third actuator is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920630527.0U CN209927477U (en) | 2019-05-05 | 2019-05-05 | Novel axle fatigue test bed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920630527.0U CN209927477U (en) | 2019-05-05 | 2019-05-05 | Novel axle fatigue test bed |
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| CN209927477U true CN209927477U (en) | 2020-01-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346156A (en) * | 2019-05-05 | 2019-10-18 | 西南交通大学 | A kind of novel axle fatigue test board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346156A (en) * | 2019-05-05 | 2019-10-18 | 西南交通大学 | A kind of novel axle fatigue test board |
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