CN108801664B - Reduced scale wheel rail rolling test stand - Google Patents
Reduced scale wheel rail rolling test stand Download PDFInfo
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- CN108801664B CN108801664B CN201811013015.6A CN201811013015A CN108801664B CN 108801664 B CN108801664 B CN 108801664B CN 201811013015 A CN201811013015 A CN 201811013015A CN 108801664 B CN108801664 B CN 108801664B
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- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 238000005096 rolling process Methods 0.000 title claims abstract description 54
- 238000004088 simulation Methods 0.000 claims abstract description 134
- 239000000725 suspension Substances 0.000 claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000006399 behavior Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008846 dynamic interplay Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
- G01M17/10—Suspensions, axles or wheels
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Abstract
The invention discloses a reduced scale wheel rail rolling test bed which comprises a reduced scale steel rail simulation disc, a driving motor, a track position adjusting disc, a reduced scale wheel disc, a basic bearing platform, a suspension simulation layer, a loading layer, a bearing platform guide post, a bearing frame device and a limiting anchor rod assembly, wherein the bearing frame device is arranged on the bearing platform guide post; the scale steel rail simulation disc is arranged on the track position adjusting disc through a bearing frame device; the reduced scale wheel disc is arranged at the bottom of the bottom bearing platform of the suspension simulation layer through a bearing frame device; the suspension simulation layer comprises a suspension simulation layer bottom bearing platform and springs; the loading layer comprises a loading layer lower bearing platform, a jack loading device and an upper fixed counter-force bearing platform which are sequentially arranged from bottom to top; the reduced-scale wheel track rolling test bed provided by the invention has the advantages of simple structure, low manufacturing cost and high equipment modularization degree, can be used for changing and matching each module according to different research requirements, can simulate the high-speed wheel track relation behaviors under various working conditions in a laboratory, and provides a convenient and ideal platform for researching the wheel track relation.
Description
Technical Field
The invention relates to an auxiliary test bed for track relation research, in particular to a reduced-scale track rolling test bed.
Background
Along with the rapid development of the economy in China, a rail transit system represented by a high-speed railway, urban rail transit and a heavy-load railway also enters a rapid development stage.
However, wheel-rail traffic has become a main structural form adopted by most of rail traffic in China at present due to the advantages of the self structure and cost, and the traction, braking and running of the train are realized by the rolling contact action of the wheel rail. It can be said that the dynamic contact relation of the wheel rail reflects the dynamic interaction between the wheels and the steel rail, is a core problem of the research on the coupling dynamics of the vehicle and the rail, is also a key technical problem in the rail traffic, and has important significance on the safety and the reliability of the train operation.
Along with the increase of the vehicle speed and the increase of the axle weight, higher requirements are put forward on the research of the wheel track relation. At present, a complex rolling form of the wheel track relationship cannot be accurately described by theoretical research alone; however, the field actual driving test has large cost and long duration, and is more easily interfered by external complex environmental factors; however, the cost for building the real-scale rolling table in a laboratory is high, the limitation of the laboratory space is also large, the rolling table is often required to be built in a large space by dividing separately, and in addition, when the test is complex (for example, when the matching of the wheel track profile is studied), the replacement work of the accessories of the real-scale rolling table is very troublesome;
meanwhile, the prior art is still blank for the establishment and design of a simple wheel track rolling test bed.
Disclosure of Invention
The invention provides a reduced-scale wheel rail rolling test bed which is used for solving the technical defects. In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the invention provides a reduced scale wheel rail rolling test bed which comprises a reduced scale steel rail simulation disc, a driving motor, a track position adjusting disc, a reduced scale wheel disc, a basic bearing platform, a suspension simulation layer, a loading layer, a bearing platform guide post, a bearing frame device and a limiting anchor rod assembly, wherein the bearing frame device is arranged on the bearing platform guide post;
the scale steel rail simulation disc is arranged on the track position adjusting disc through a bearing frame device; the reduced steel rail simulation disc is connected with a driving motor (not shown in the figure);
the reduced-scale wheel disc is arranged at the bottom of the bottom bearing platform of the suspension simulation layer through a bearing frame device; the reduced scale wheel disc is positioned right above the reduced scale steel rail simulation disc, and the reduced scale wheel disc is used for forming rolling fit with the reduced scale steel rail simulation disc after being contacted with the surface of the reduced scale steel rail simulation disc;
the track position adjusting disc is directly arranged at the center of the basic bearing platform and is in running fit within a certain angle range relative to the basic bearing platform; the track position adjusting disc is used for driving the reduced steel rail simulation disc to allow adjustment action within an impact angle ranging from minus 6 degrees to plus 6 degrees through the rotation action of the ball turntable;
the suspension simulation layer comprises a suspension simulation layer bottom bearing platform and springs;
the loading layer comprises a loading layer lower bearing platform, a jack loading device and an upper fixed counter-force bearing platform which are sequentially arranged from bottom to top; the bottom of the bearing platform guide post is connected with the basic bearing platform, and the top of the bearing platform guide post sequentially penetrates through the bottom bearing platform of the suspension simulation layer and the lower bearing platform of the loading layer from bottom to top and is connected with the upper fixed counterforce bearing platform; the upper fixed reaction bearing platform is used for supporting a reaction frame when loaded; the springs are arranged between the bottom bearing platform of the suspension simulation layer and the lower bearing platform of the loading layer;
the limiting anchor rod assembly comprises a limiting anchor rod and three nuts which are in threaded fit with the limiting anchor rod; the limiting anchor rod sequentially penetrates through the bottom bearing platform of the suspension simulation layer, the lower bearing platform of the loading layer and the upper fixed counter-force bearing platform from bottom to top; and one nut is arranged at the bottom of the bottom bearing platform of the suspension simulation layer, and the other two nuts are respectively fixed at the top and the two sides of the bottom of the counter-force bearing platform at the upper part.
Preferably, as one possible embodiment; the spring is specifically a steel structure spring.
Preferably, as one possible embodiment; the four bearing platform guide posts are symmetrically distributed and penetrate through the peripheral corners of the bearing platform at the bottom of the suspension simulation layer, the peripheral corners of the bearing platform at the lower part of the loading layer and the peripheral corners of the fixed counterforce bearing platform at the upper part.
Preferably, as one possible embodiment; the four limit anchor rods are symmetrically distributed and penetrate through two sides of a bottom bearing platform of the suspension simulation layer, two sides of a lower bearing platform of the loading layer and two sides of an upper fixed counter-force bearing platform.
Preferably, as one possible embodiment; and the bearing platform at the lower part of the loading layer and the bearing platform at the bottom of the suspension simulation layer are in sliding fit with the bearing platform guide posts.
Preferably, as one possible embodiment; the top of the bottom bearing platform of the suspension simulation layer is provided with a limit groove structure, and the bottom of the lower bearing platform of the loading layer is also provided with a limit groove structure; and the limiting groove structure at the top position of the bottom bearing platform of the suspension simulation layer corresponds to the limiting groove structure at the bottom of the lower bearing platform of the loading layer in position and is used for accommodating the spring.
Preferably, as one possible embodiment; the reduced-scale wheel-rail rolling test bed also comprises a counterweight device; the counterweight device is fixedly connected to the surface of the basic bearing platform.
Preferably, as one possible embodiment; the reduced scale wheel disc and the reduced scale steel rail simulation disc are all according to the actual profile size and 1: the ratio of 4 is scaled down equally.
Preferably, as one possible embodiment; the diameter dimension ratio of the reduced scale wheel disc to the reduced scale steel rail simulation disc is 1:2.5.
preferably, as one possible embodiment; a friction pad is sleeved on the bearing platform guide post between the bottom bearing platform of the suspension simulation layer and the lower bearing platform; the friction pad is a silicone rubber layer.
Compared with the prior art, the embodiment of the invention has the advantages that:
the invention provides a reduced-scale wheel rail rolling test bed, which is characterized in that the main structure of the product is as follows: the reduced scale wheel rail rolling test bed mainly comprises a reduced scale steel rail simulation disc, a driving motor, a track position adjusting disc, a reduced scale wheel disc, a basic bearing platform, a suspension simulation layer, a loading layer, a bearing platform guide post, a bearing frame device, a limiting anchor rod assembly and other structures;
the scale steel rail simulation disc is arranged on the track position adjusting disc through a bearing frame device; the reduced steel rail simulation disc is connected with a driving motor (not shown in the figure);
the reduced-scale wheel disc is arranged at the bottom of the bottom bearing platform of the suspension simulation layer through a bearing frame device; the reduced scale wheel disc is positioned right above the reduced scale steel rail simulation disc, and the reduced scale wheel disc is used for forming rolling fit with the reduced scale steel rail simulation disc after being contacted with the surface of the reduced scale steel rail simulation disc;
the track position adjusting disc is directly arranged at the center of the basic bearing platform and is in running fit within a certain angle range relative to the basic bearing platform; the track position adjusting disc is used for driving the reduced steel rail simulation disc to allow adjustment action within an impact angle ranging from minus 6 degrees to plus 6 degrees through the rotation action of the ball turntable;
the suspension simulation layer comprises a suspension simulation layer bottom bearing platform and springs;
the loading layer comprises a loading layer lower bearing platform, a jack loading device and an upper fixed counter-force bearing platform which are sequentially arranged from bottom to top; the bottom of the bearing platform guide post is connected with the basic bearing platform, and the top of the bearing platform guide post sequentially penetrates through the bottom bearing platform of the suspension simulation layer and the lower bearing platform of the loading layer from bottom to top and is connected with the upper fixed counterforce bearing platform; the upper fixed reaction bearing platform is used for supporting a reaction frame when loaded; the springs are arranged between the bottom bearing platform of the suspension simulation layer and the lower bearing platform of the loading layer;
the limiting anchor rod assembly comprises a limiting anchor rod and three nuts which are in threaded fit with the limiting anchor rod; the limiting anchor rod sequentially penetrates through the bottom bearing platform of the suspension simulation layer, the lower bearing platform of the loading layer and the upper fixed counter-force bearing platform from bottom to top; and one nut is arranged at the bottom of the bottom bearing platform of the suspension simulation layer, and the other two nuts are respectively fixed at the top and the two sides of the bottom of the counter-force bearing platform at the upper part.
In a specific structure; the upper fixed reaction bearing platform is fixed with the bearing platform guide post, and plays a role in supporting a reaction frame when being loaded; the bearing platform at the lower part of the loading layer is connected with the suspension simulation layer to play a role in fixing the springs and transmitting force; the suspension simulation layer is positioned between the loading layer and the reduced scale wheel disc, and a pair of left and right springs are matched with the bearing platform to carry out force transmission; the bearing platform guide posts penetrate through each layer to play roles in supporting the whole structure and limiting the force transmission direction.
In the specific use process: during the test, changing the reduced scale steel rail simulation disc and the reduced scale wheel disc of the corresponding molded surfaces according to the research requirements; after the impact angle of the steel rail is adjusted by utilizing the track position adjusting disc, a limit elastic nut at the bottom of the limit anchor rod is screwed, so that the reduced scale wheel disc is in natural contact with the reduced scale steel rail simulating disc; after the specified pressure is applied by the jack loading device, the motor is started by the motor control device to drive the reduced steel rail simulation disc to rotate to start the test. Related element measurement can be carried out by matching other sensors (such as an accelerometer and the like) according to specific requirements in the test.
In summary, the reduced-scale wheel rail rolling test bed provided by the embodiment of the invention has high modularization degree, the reduced-scale wheel disc and the reduced-scale rail simulation disc can be replaced according to research requirements, and the wheel rail contact relationship and the friction abrasion condition under the influence of variables such as different pressures (axle weights), speeds, profile matching, wheel rail relative positions and the like can be researched by adjusting the driving and loading devices.
The reduced-scale wheel track rolling test bed provided by the embodiment of the invention has the advantages of novel structure and reasonable design, and the simulation test of the rolling test bed is completed through simple and unusual architecture design, so that the reduced-scale wheel track rolling test bed provides remarkable help for the research of the wheel track relationship.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a reduced-scale wheel-rail rolling test stand provided by an embodiment of the invention;
FIG. 2 is an assembly structure diagram between a bottom bearing platform of a suspension simulation layer and a spring and limit groove structure in a reduced-scale wheel-rail rolling test bed provided by the embodiment of the invention;
fig. 3 is a three-dimensional assembly structure diagram among a bottom bearing platform of a suspension simulation layer, a lower bearing platform of a loading layer, an upper fixed counterforce bearing platform and an anchor rod limiting assembly in the reduced-scale wheel-rail rolling test stand provided by the embodiment of the invention;
fig. 4 is a front view assembly structure diagram of a suspension simulation layer bottom bearing platform, a loading layer lower bearing platform, an upper fixed reaction bearing platform and an anchor rod limiting assembly in the reduced-scale wheel-rail rolling test stand provided by the embodiment of the invention.
Reference numerals: a reduced steel rail simulation disc 1; a track position adjusting disc 2; a reduced-scale wheel disc 3; a base bearing platform 4; hanging a bottom bearing platform 5 of the simulation layer; a spring 6; a bearing platform 7 at the lower part of the loading layer; jack loading means 8; the upper part is fixed with a counterforce bearing platform 9; a bearing platform guide post 10; bearing frame means 11; a limit groove structure 12; a limit anchor rod 13; a nut 14; suspending the simulation layer A; loading a layer B; and limiting the anchor rod assembly C.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that certain terms indicating orientations or positional relationships are merely used to facilitate the description of the present invention and to simplify the description, and are not meant to indicate or imply that the devices or elements being referred to must be oriented, configured and operated in a particular orientation, and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that "connected" is to be understood in a broad sense, for example, may be a fixed connection, may be a detachable connection, or may be integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
Referring to fig. 1, the embodiment of the invention provides a reduced scale wheel rail rolling test stand, which comprises a reduced scale steel rail simulation disc 1, a driving motor, a track position adjusting disc 2, a reduced scale wheel disc 3, a basic bearing platform 4, a suspension simulation layer a, a loading layer B, a bearing platform guide post 10, a bearing bracket device 11 and a limit anchor rod assembly C (the partial structure can be seen in fig. 2, 3 and 4);
the reduced steel rail simulation disc 1 is arranged on the track position adjusting disc 2 through a bearing frame device 11; the reduced steel rail simulation disc 1 is connected with a driving motor (not shown in the figure);
the reduced scale wheel disc 3 is arranged at the bottom of the bottom bearing platform 5 of the suspension simulation layer through a bearing frame device 11; the reduced scale wheel disc 3 is positioned right above the reduced scale steel rail simulation disc 1, and the reduced scale wheel disc 3 is used for forming rolling fit with the reduced scale steel rail simulation disc 1 after being contacted with the surface of the reduced scale steel rail simulation disc 1;
the track position adjusting disc 2 is directly arranged in the center of the base bearing platform 4, and the track position adjusting disc 2 is in rotating fit within a certain angle range relative to the base bearing platform 4; the track position adjusting disc 2 is used for driving the reduced scale steel rail simulation disc 1 to allow adjustment motion within an impact angle ranging from minus 6 degrees to plus 6 degrees through the rotation action of the ball turntable;
the suspension simulation layer A comprises a suspension simulation layer bottom bearing platform 5 and a spring 6;
the loading layer B comprises a loading layer lower bearing platform 7, a jack loading device 8 and an upper fixed reaction bearing platform 9 which are sequentially arranged from bottom to top; the jack loading device 8 is arranged between the loading layer lower bearing platform 7 and the upper fixed counter-force bearing platform 9; the bottom of the bearing platform guide post 10 is connected with the basic bearing platform 4, and the top of the bearing platform guide post 10 sequentially penetrates through the bottom bearing platform 5 of the suspension simulation layer and the lower bearing platform 7 of the loading layer from bottom to top and is connected with the upper fixed counter-force bearing platform 9; the upper fixed reaction bearing platform 9 is used for playing a role in supporting a reaction frame during loading; the springs 6 are arranged between the bottom bearing platform 5 of the suspension simulation layer and the lower bearing platform 7 of the loading layer;
the limit anchor rod assembly C comprises a limit anchor rod 13 and three nuts 14 which are in threaded fit with the limit anchor rod; the limiting anchor rod sequentially penetrates through the bottom bearing platform 5 of the suspension simulation layer, the lower bearing platform 7 of the loading layer and the upper fixed counter-force bearing platform 9 from bottom to top; and one nut is arranged at the bottom of the bottom bearing platform 5 of the suspension simulation layer, and the other two nuts are respectively fixed at the top and the bottom of the counter-force bearing platform 9 at the upper part.
As shown in fig. 1, the reduced-scale steel rail simulation disc is connected with a driving motor (not shown in the figure); the track position adjusting disc is directly arranged in the center of the basic bearing platform 4, and the impact angle adjustment of the reduced steel rail simulation disc in the range of-6 degrees to +6 degrees is allowed through the ball turntable. The reduced scale wheel disc 3 is positioned right above the reduced scale steel rail simulation disc and is fixed on the bottom bearing platform 5 of the suspension simulation layer; the loading layer consists of a loading layer lower bearing platform 7, a jack loading device 8 and an upper fixed reaction bearing platform 9, wherein the upper fixed reaction bearing platform is fixed through a bearing platform guide post 10 and plays a role in supporting a reaction frame during loading; the bearing platform at the lower part of the loading layer is connected with the suspension simulation layer to play a role in fixing the springs and transmitting force; the suspension simulation layer is positioned between the loading layer and the reduced scale wheel disc, and a pair of springs 6 at left and right sides are matched with the bearing platform to carry out force transmission; the bearing platform guide posts 10 penetrate through each layer to play roles in supporting the whole structure and limiting the force transmission direction.
The main structure of the analysis of the above products is as follows: the reduced scale wheel rail rolling test bed mainly comprises a reduced scale steel rail simulation disc 1, a driving motor, a track position adjusting disc 2, a reduced scale wheel disc 3, a basic bearing platform 4, a suspension simulation layer A, a loading layer B, a limit anchor rod assembly C, a bearing platform guide post 10, a bearing frame device 11 and other structures;
in a specific structure; the upper fixed reaction bearing platform 9 is fixed through a bearing platform guide post 10 and plays a role in supporting a reaction frame during loading; the bearing platform 7 at the lower part of the loading layer is connected with the suspension simulation layer A to play roles of fixing springs and transmitting force; the suspension simulation layer A is positioned between the loading layer B and the reduced scale wheel disc 3, and a pair of springs 6 on the left and right are matched with the bearing platform to transfer force; the bearing platform guide posts 10 penetrate through each layer to play roles in supporting the whole structure and limiting the force transmission direction; the foundation bearing platform 4 is fixed on the ground after being provided with a certain counterweight, so that the stability of the whole structure is ensured.
In the specific use process: during the test, the reduced steel rail simulation disc 1 and the reduced wheel disc 3 of the corresponding molded surfaces are replaced according to the research requirements; after the rail impact angle is adjusted by utilizing the rail position adjusting disc 2, a limit elastic nut at the bottom of the limit anchor rod 13 is screwed, so that the reduced scale wheel disc is in natural contact with the reduced scale rail simulation disc; after the specified pressure is applied by the jack loading device 8, the motor is started by the motor control device to drive the reduced steel rail simulation disc to rotate to start the test. Related element measurement can be carried out by matching other sensors (such as an accelerometer and the like) according to specific requirements in the test.
In summary, the reduced-scale wheel track rolling test bed provided by the embodiment of the invention has the advantages of novel structure, reasonable design, completion of the simulation test of the rolling test bed through simple and unusual architecture design, and obvious help to the research of wheel track relationship.
In addition, it should be noted that; the wheel track attack angle phi (namely the wheel track attack angle) refers to the included angle between the advancing direction of a wheel pair and the tangent line of the central line of a track when a train runs on a straight line or the included angle between the axis of the wheel pair and the radial direction of the curve of the track when the train runs on a curve line.
The following describes the specific structure and the specific technical effects of the reduced-scale wheel-rail rolling test stand provided by the embodiment of the invention in detail:
preferably, as one possible embodiment; the spring 6 is specifically a steel structure spring.
In the specific technical scheme of the embodiment of the invention, as shown in fig. 1, the spring 6 can be a pressure spring with various structural forms, but the most preferable technical scheme is to use a steel structural spring with high compressive load resistance and high restorable deformation capability, and is particularly suitable for use in a reduced-scale wheel-rail rolling test bed.
Preferably, as one possible embodiment; the four bearing platform guide posts 10 are symmetrically distributed and penetrate through the peripheral corners of the bottom bearing platform 5 of the suspension simulation layer, the peripheral corners of the lower bearing platform 7 of the loading layer and the peripheral corners of the upper fixed counterforce bearing platform 9.
In the specific technical scheme of the embodiment of the present invention, as shown in fig. 1, four bearing platform guide posts 10 are provided, and the four bearing platform guide posts 10 are symmetrically distributed and pass through the corners of the periphery of the three layers of bearing platforms, so that stable force transmission and sliding effects can be ensured.
Preferably, as one possible embodiment; and the bearing platform 7 at the lower part of the loading layer and the bearing platform 5 at the bottom of the suspension simulation layer are in sliding fit with the bearing platform guide posts 10. The number of the limit anchor rods 13 is four, and the four limit anchor rods 13 are symmetrically distributed and penetrate through two sides of the bottom bearing platform 5 of the suspension simulation layer, two sides of the lower bearing platform 7 of the loading layer and two sides of the upper fixed counter-force bearing platform 9.
In the specific technical solution of the embodiment of the present invention, as shown in fig. 3 and 4, the lower bearing platform 7 of the loading layer, the bottom platform 5 of the suspension simulation layer, and the platform guide post 10 are slidable. Meanwhile, in order to ensure that the reduced scale wheel disc 3 only contacts the reduced scale steel rail simulation disc 1 when necessary, the bearing platform is required to be vertically limited after the limit anchor rod 13 is matched. Four limit anchor rods 13 which are symmetrically distributed penetrate through the three layers of bearing platforms, and upper nuts are fixed at the top of the upper fixed counter-force bearing platform 9; elastic nuts are arranged on the upper side and the lower side of the bottom bearing platform 5 of the suspension simulation layer.
The three-layer bearing platform is vertically limited through the four limiting anchor rods, nuts are arranged on the limiting anchor rods to adjust, and the reduced-scale wheel disc and the reduced-scale steel rail simulation disc can be ensured to be contacted only when necessary.
Preferably, as one possible embodiment; the top of the bottom bearing platform 5 of the suspension simulation layer is provided with a limit groove structure 12, and the bottom of the lower bearing platform 7 of the loading layer is also provided with a limit groove structure 12; the limiting groove structure 12 at the top of the bottom bearing platform 5 of the suspension simulation layer corresponds to the limiting groove structure 12 at the bottom of the lower bearing platform 7 of the loading layer in position and is used for accommodating the springs 6.
In the specific technical solution of the embodiment of the present invention, as shown in fig. 2, the bottom bearing platform 5 of the suspension simulation layer and the lower bearing platform 7 (not shown) of the loading layer are used with the limit groove structure 12 shown in the drawings corresponding to the positions of the springs, so as to prevent the springs from buckling. And a limit groove structure with a corresponding size is arranged at the installation position of the steel spring in a matching way, so that uniform force transmission between the steel spring and the limit groove structure can be realized.
Preferably, as one possible embodiment; the reduced-scale wheel-rail rolling test bed also comprises a counterweight device; the counterweight device is fixedly connected to the surface of the basic bearing platform 4.
In the specific technical scheme of the embodiment of the invention, the base bearing platform 4 is fixed on the ground (namely, the assembly weighing device is added) after a certain counterweight is arranged, so that the whole structure stability of the reduced scale wheel rail rolling test bed can be ensured, and the smooth performance of the test is ensured.
Preferably, as one possible embodiment; the reduced scale wheel disc 3 and the reduced scale steel rail simulation disc 1 are arranged according to the actual profile and the following ratio is 1: the ratio of 4 is scaled down equally.
It should be noted that, in the specific technical scheme of the embodiment of the present invention; the reduced scale wheel disc 3 (i.e. the simulated wheel) is matched with the reduced scale steel rail simulation disc 1 (i.e. the simulated steel rail), the reduced scale wheel disc 3 is actually detachably connected with the bottom bearing platform of the suspended simulation layer, and the design of the detachable connection enables the free replacement of different wheel rail profile components according to research requirements.
Preferably, as one possible embodiment; the diameter ratio of the reduced-scale wheel disc to the reduced-scale steel rail simulation disc is 1:2.5. the reduced steel rail simulation disc can allow impact angle adjustment within a certain range through the track position adjusting disc;
preferably, as one possible embodiment; the driving motor comprises a motor and a control system thereof, and can realize the ideal reduced-scale running speed of 120km/h at maximum, and the speed can be adjusted.
In the technical scheme of the invention, a reduced-scale wheel disc is adopted to drive, and pressure is loaded through wheels; in a specific connection structure, a motor shaft of the driving motor is fixedly connected with a reduced steel rail simulation disc wheel shaft through a coupler, so that direct driving is realized, and the space and cost of a test bed can be saved.
In addition, the upper fixed counterforce bearing platform and the lower bearing platform of the loading layer B are thickened in cross section at the loading position of the jack for rigidity reinforcement. Meanwhile, the stressing of the jack installing device 8 is controllable and adjustable, and the jack installing device can load an ideal reduced scale load of 2 tons at most.
Preferably, as one possible embodiment; a friction pad is sleeved on the bearing platform guide column positioned between the bottom bearing platform of the suspension simulation layer and the lower bearing platform; the friction pad is a silicone rubber layer.
It should be noted that, in the specific technical scheme of the embodiment of the present invention; the friction pad is sleeved on the bearing platform guide post between the bottom bearing platform of the suspension simulation layer and the lower bearing platform, and the friction pad can be used for reducing abrasion and damping of the bearing platform guide post.
The reduced-scale wheel rail rolling test bed provided by the invention has at least the following technical advantages:
1. the invention provides a reduced scale wheel rail rolling test bed which is composed of a reduced scale steel rail simulation disc, a driving motor, a track position adjusting disc, a reduced scale wheel disc, a basic bearing platform, a suspension simulation layer, a loading layer, a bearing platform guide post, a bearing frame device, a limiting anchor rod assembly and other structures; in a specific structure; the upper fixed reaction bearing platform is fixed with the bearing platform guide post, and plays a role in supporting a reaction frame when being loaded; the bearing platform at the lower part of the loading layer is connected with the suspension simulation layer to play a role in fixing the springs and transmitting force; the suspension simulation layer is positioned between the loading layer and the reduced scale wheel disc, and a pair of left and right springs are matched with the bearing platform to carry out force transmission; the bearing platform guide posts penetrate through each layer to play roles in supporting the whole structure and limiting the force transmission direction. The specific structures of the reduced steel rail simulation disc, the track position adjusting disc, the reduced wheel disc, the basic bearing platform, the suspension simulation layer, the loading layer, the bearing platform guide post, the bearing frame device, the limiting anchor rod assembly and the like are all designed independently, and the connection relation and the position relation among the specific structures are designed reasonably; therefore, the reduced-scale wheel rail rolling test bed provided by the embodiment of the invention has more reasonable technical structure and more perfect functions. The reduced-scale wheel rail rolling test bed provided by the invention can replace a reduced-scale wheel disc and a reduced-scale steel rail simulation disc according to research requirements, and can research the wheel rail contact relation and friction abrasion conditions under the influence of variables such as different pressures (axle weights), speeds, profile matching, wheel rail relative positions and the like by adjusting the driving and loading devices.
2. The reduced-scale wheel-rail rolling test bed provided by the invention can be used for developing wheel-rail relation test research under the condition of limited field space in a laboratory.
3. The reduced-scale wheel-rail rolling test bed provided by the invention has the advantages of simple structure, definite stress and low manufacturing cost, and provides a convenient and ideal platform for researching the wheel-rail relationship. .
Based on the technical advantages of the aspects, the reduced-scale wheel track rolling test bed provided by the embodiment of the invention has good market prospect and economic benefit.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The rolling test bed for the reduced scale wheel rail is characterized by comprising a reduced scale steel rail simulation disc, a driving motor, a track position adjusting disc, a reduced scale wheel disc, a basic bearing platform, a suspension simulation layer, a loading layer, a bearing platform guide column, a bearing frame device and a limiting anchor rod assembly;
the scale steel rail simulation disc is arranged on the track position adjusting disc through a bearing frame device; the reduced steel rail simulation disc is connected with a driving motor;
the reduced-scale wheel disc is arranged at the bottom of the bottom bearing platform of the suspension simulation layer through a bearing frame device; the reduced scale wheel disc is positioned right above the reduced scale steel rail simulation disc, and the reduced scale wheel disc is used for forming rolling fit with the reduced scale steel rail simulation disc after being contacted with the surface of the reduced scale steel rail simulation disc;
the track position adjusting disc is directly arranged at the center of the basic bearing platform and is in running fit within a certain angle range relative to the basic bearing platform; the track position adjusting disc is used for driving the reduced steel rail simulation disc to allow adjustment action within an impact angle ranging from minus 6 degrees to plus 6 degrees through the rotation action of the ball turntable;
the suspension simulation layer comprises a suspension simulation layer bottom bearing platform and springs;
the loading layer comprises a loading layer lower bearing platform, a jack loading device and an upper fixed counter-force bearing platform which are sequentially arranged from bottom to top; the bottom of the bearing platform guide post is connected with the basic bearing platform, and the top of the bearing platform guide post sequentially penetrates through the bottom bearing platform of the suspension simulation layer and the lower bearing platform of the loading layer from bottom to top and is connected with the upper fixed counterforce bearing platform; the upper fixed reaction bearing platform is used for supporting a reaction frame when loaded; the springs are arranged between the bottom bearing platform of the suspension simulation layer and the lower bearing platform of the loading layer;
the limiting anchor rod assembly comprises a limiting anchor rod and three nuts which are in threaded fit with the limiting anchor rod; the limiting anchor rod sequentially penetrates through the bottom bearing platform of the suspension simulation layer, the lower bearing platform of the loading layer and the upper fixed counter-force bearing platform from bottom to top; one nut is arranged at the bottom of the bottom bearing platform of the suspension simulation layer, and the other two nuts are respectively fixed at the top and the bottom of the counter-force bearing platform at the upper part;
the scale wheel disc is detachably connected with the bottom bearing platform of the suspension simulation layer.
2. The reduced-scale wheel-rail rolling test stand of claim 1, wherein,
the spring is specifically a steel structure spring.
3. The reduced-scale wheel-rail rolling test stand of claim 1, wherein,
the four bearing platform guide posts are symmetrically distributed and penetrate through the peripheral corners of the bearing platform at the bottom of the suspension simulation layer, the peripheral corners of the bearing platform at the lower part of the loading layer and the peripheral corners of the fixed counterforce bearing platform at the upper part.
4. The reduced-scale wheel-rail rolling test stand of claim 1, wherein,
the four limit anchor rods are symmetrically distributed and penetrate through two sides of a bottom bearing platform of the suspension simulation layer, two sides of a lower bearing platform of the loading layer and two sides of an upper fixed counter-force bearing platform.
5. The reduced-scale wheel-rail rolling test stand of claim 1, wherein,
and the bearing platform at the lower part of the loading layer and the bearing platform at the bottom of the suspension simulation layer are in sliding fit with the bearing platform guide posts.
6. The reduced-scale wheel-rail rolling test stand of claim 1, wherein,
the top of the bottom bearing platform of the suspension simulation layer is provided with a limit groove structure, and the bottom of the lower bearing platform of the loading layer is also provided with a limit groove structure; and the limiting groove structure at the top position of the bottom bearing platform of the suspension simulation layer corresponds to the limiting groove structure at the bottom of the lower bearing platform of the loading layer in position and is used for accommodating the spring.
7. The reduced-scale wheel-rail rolling test stand of claim 1, wherein,
the reduced-scale wheel-rail rolling test bed also comprises a counterweight device; the counterweight device is fixedly connected to the surface of the basic bearing platform.
8. The reduced-scale wheel-rail rolling test stand of claim 1, wherein,
the reduced scale wheel disc and the reduced scale steel rail simulation disc are all according to the actual profile size and 1: the ratio of 4 is scaled down equally.
9. The reduced-scale wheel-rail rolling test stand of claim 1, wherein,
the diameter dimension ratio of the reduced scale wheel disc to the reduced scale steel rail simulation disc is 1:2.5.
10. the reduced-scale wheel-rail rolling test stand of claim 1, wherein,
a friction pad is sleeved on the bearing platform guide post between the bottom bearing platform of the suspension simulation layer and the lower bearing platform; the friction pad is a silicone rubber layer.
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