Bogie excitation test bench

Abstract

The invention relates to the technical field of vehicle testing, in particular to a bogie excitation test bench which comprises a foundation platform, a test platform and a test platform. The detection device is arranged on the basic platform; the fixing device is arranged on the detection device; the first rail wheel is rotatably arranged on the fixing device; the second track wheel is rotatably arranged on the fixing device; the first track wheel and the second track wheel are in contact with the wheels; the first track wheel and the second track wheel are respectively provided with an excitation edge part, and the first track wheel and the second track wheel have various phase positions. According to the bogie excitation test bed, phase adjustment of the two rail wheels can be achieved by adjusting the positions where the wave crests and the wave troughs of the two rail wheels directly face each other, a high-frequency excitation test of any phase of the bogie can be stably executed, and technical support is provided for structural design of the rail transit bogie and safe, high-speed and reliable operation of a vehicle; and further development of rail transit vehicle bodies is promoted.

Description

Technical Field

[0001] This application relates to the field of vehicle testing technology, and in particular to a bogie vibration test bench. Background Technology

[0002] With the increasing speed and mileage of high-speed trains, problems with bogie structures such as frames and booms can lead to economic losses in the tens of millions of yuan. High-frequency wheel-rail excitation is a significant source of bogie structural vibration damage during high-speed train service, primarily including excitations from wheel deformation (545~600Hz), track sleepers (84~155Hz), track corrugation (1000~1150Hz), second-order vertical bending mode of the rail (approximately 350Hz), and rail pin-pin mode (approximately 840Hz). However, current technology lacks the necessary equipment and conditions for vibration testing of high-speed train bogies, making the bogie inspection process difficult and hindering intuitive problem detection. Furthermore, the lack of standardized testing procedures prevents qualitative and quantitative analysis. Summary of the Invention

[0003] The purpose of this application is to provide a bogie vibration test bench, so as to solve to some extent the technical problems of the existing bogie testing process being difficult and the difficulty in visually identifying problems.

[0004] This application provides a bogie vibration test bench for a bogie to be tested, the bogie to be tested including at least wheels, and the bogie vibration test bench comprising: Basic platform; The detection device is mounted on the base platform; A fixing device, wherein the fixing device is disposed on the detection device; A first track wheel is rotatably mounted on the fixing device; The second track wheel is rotatably mounted on the fixing device and is spaced apart from the first track wheel; the first track wheel and the second track wheel can contact the wheel on the side of the bogie; The first track wheel and the second track wheel are respectively provided with excitation edges, and the excitation edges include multiple continuous and alternately arranged peaks and troughs; the first track wheel and the second track wheel have multiple phase positions.

[0005] In the above technical solution, the first track wheel further includes: A first mark, one end of which points to the axis of the first track wheel, and the other end of which points to one of the crests of the first track wheel; A second mark, one end of which points to the axis of the first track wheel, and the other end of which points to one of the troughs of the first track wheel. In any of the above technical solutions, the second track wheel further includes: A third mark, one end of which points to the axis of the second track wheel, and the other end of which points to one of the crests of the second track wheel; A fourth mark, one end of which points to the axis of the second track wheel, and the other end of which points to one of the troughs of the second track wheel.

[0006] In any of the above technical solutions, the fixing device further includes: A first fixed base, wherein the first track wheel is rotatably disposed on the first fixed base; The second fixed seat is spaced apart from the first fixed seat, and the second track wheel is rotatably mounted on the second fixed seat; A driving device for driving the first track wheel and the second track wheel to rotate.

[0007] In any of the above technical solutions, the first fixing base further includes: First fixing plate; A first support is disposed on the first fixing plate; The second support is disposed on the first fixing plate, and the first support and the second support are spaced apart; A first connecting shaft is rotatably disposed on the first support and the second support; a first track wheel is disposed on the first connecting shaft and is located between the first support and the second support.

[0008] In any of the above technical solutions, the second fixing base further includes: Second fixing plate; The third support is disposed on the second fixing plate; The fourth support is disposed on the second fixing plate, and the third support is disposed at a distance from the fourth support; A second connecting shaft is rotatably disposed on the third support and the fourth support; a second track wheel is disposed on the second connecting shaft and is located between the third support and the fourth support; The drive device is connected to the first connecting shaft or the second connecting shaft.

[0009] In any of the above technical solutions, the bogie vibration test bench further includes a coupling, through which the first track wheel and the second track wheel are connected.

[0010] In any of the above technical solutions, the detection device further includes two detection components, which are spaced apart on the base platform; One of the detection components is located below the first fixing base, and the other detection component is located below the second fixing base.

[0011] In any of the above technical solutions, the detection component further includes: An upper mounting plate, which is connected to the fixing device; A lower mounting plate, which is connected to the base platform; A detection component is disposed between the upper mounting plate and the lower mounting plate.

[0012] In any of the above technical solutions, the base platform further includes a bearing surface, and the lower mounting plate is slidably connected to the bearing surface. Compared with the prior art, the beneficial effects of this application are as follows: The bogie vibration test bench provided in this application includes: a base platform; a testing device disposed on the base platform; a fixing device disposed on the testing device; a first track wheel rotatably disposed on the fixing device; a second track wheel rotatably disposed on the fixing device, the second track wheel being spaced apart from the first track wheel; the first track wheel and the second track wheel are capable of contacting the wheels on the side of the bogie; the first track wheel and the second track wheel are respectively provided with excitation edges, the excitation edges including multiple continuous and alternating peaks and troughs; the first track wheel and the second track wheel have multiple phase positions. This bogie vibration test rig can adjust the phase of the two track wheels by adjusting the positions of their crests and troughs to achieve the required phase state. After the rig is started and the two track wheels rotate synchronously, it can stably perform high-frequency vibration tests on the bogie in any phase. The test results from the detection device can be used to identify the working modal parameters of the bogie under test and acquire vibration and strength data. This provides technical support for the structural design of rail transit bogies and the safe, high-speed, and reliable operation of vehicles, and promotes the further development of rail transit vehicles. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the bogie vibration test bench provided in the embodiments of this application; Figure 2 Another structural schematic diagram of the bogie vibration test bench provided in the embodiments of this application; Figure 3 This is a partial structural schematic diagram of the bogie vibration test bench provided in an embodiment of this application; Figure 4 This is another structural schematic diagram of the bogie vibration test bench provided in the embodiments of this application.

[0015] Figure label: 1-Basic platform, 101-Bearing surface, 102-Slide groove, 103-Insertion interface, 2-Detection component, 201-Upper mounting plate, 202-Lower mounting plate, 203-Detection piece, 204-Connecting rod, 3-First fixed seat, 301-First support, 302-Second support, 303-First connecting shaft, 304-First bearing seat, 305-Second bearing seat, 306-First fixed plate, 4-Second fixed seat, 401-Third support, 402-Fourth support, 403-Second connecting shaft, 404-Third bearing seat, 405-Fourth bearing seat, 406-Second fixed plate, 5-Bogie to be tested, 501-First wheel, 502-Second wheel, 503-Axle, 6-Coupling, 7-First track wheel, 701-First mark, 702-Second mark, 8-Second track wheel, 9-Excitation edge. Detailed Implementation

[0016] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0017] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0018] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] The following reference Figures 1 to 4 The bogie vibration test bench described in the embodiments of this application is illustrated.

[0022] See Figures 1 to 4As shown, an embodiment of this application provides a bogie vibration test bench for exciting a bogie 5 under test. The bogie 5 under test, as the object of testing, includes a bogie body, an axle 503, and wheels. The axle 503 is disposed on the bogie body, and there are two wheels, namely a first wheel 501 and a second wheel 502. The first wheel 501 is disposed at one end of the axle 503, and the second wheel 502 is disposed at the other end of the axle 503. The bogie vibration test bench includes: a base platform 1, a fixing device, a first track wheel 7, a second track wheel 8, and a testing device. The testing device is disposed on the base platform 1, and the fixing device is disposed on the testing device. The first track wheel 7 and the second track wheel 8 are rotatably disposed on the fixing device, and the first track wheel 7 and the second track wheel 8 are spaced apart. Optionally, the first track wheel 7 abuts against the first wheel 501 below, and the second track wheel 8 abuts against the second wheel 502 below. The detection device can act on the first track wheel 7 and the second track wheel 8 to detect relevant data of the first track wheel 7 and the second track wheel 8 during operation. Both the first track wheel 7 and the second track wheel 8 are provided with excitation edges 9, which are distributed circumferentially along the side of the first track wheel 7 and the side of the second track wheel 8. The excitation edges 9 include multiple continuous and alternating peaks and troughs, so that when the first track wheel 7 and the second track wheel 8 rotate, the first track wheel 7 can generate vibration excitation on the first wheel 501, and the second track wheel 8 can generate vibration excitation on the second wheel 502.

[0023] Specifically, the fixing device includes a first fixing seat 3 and a second fixing seat 4, both of which have the same structure. The base platform 1 is fixedly installed at a designated position. The base platform 1 has a bearing surface 101 with high flatness. The first fixing seat 3 and the second fixing seat 4 are spaced apart along the length of the surface.

[0024] The first fixed base 3 includes a first fixed plate 306, a first connecting shaft 303, a first support 301, and a second support 302. The first support 301 and the second support 302 are spaced apart on the first fixed plate 306 along the length of the bearing platform. The first support 301 is provided with a first bearing seat 304, and the second support 302 is provided with a second bearing seat 305. The first connecting shaft 303 passes through the first bearing seat 304 and the second bearing seat 305, and is rotatably connected to the first fixed base 3 via the first bearing seat 304 and the second bearing seat 305. Simultaneously, the first connecting shaft 303 passes through a first track wheel 7, which is located between the first support 301 and the second support 302.

[0025] The second fixed seat 4 includes a second fixed plate 406, a second connecting shaft 403, a third support 401 and a fourth support 402, and also includes a third bearing seat 404 and a fourth bearing seat 405. The structure of the second fixed seat 4 is the same as that of the first fixed seat 3. The second track wheel 8 is rotatably connected to the second fixed seat 4 in the same way. Those skilled in the art can fully understand this, and it will not be described in detail here.

[0026] The fixed device also includes a drive device (not shown in the figure), which drives the first track wheel 7 and the second track wheel 8 to rotate. Specifically, the drive device can be a servo motor, which provides output torque to the first track wheel 7 and the second track wheel 8. By adjusting the speed of the drive device, the speeds of the first track wheel 7 and the second track wheel 8 can be adjusted, thereby adjusting the excitation frequency of the first wheel 501 and the second wheel 502. The drive device is connected to either the first connecting shaft 303 or the second connecting shaft 403. Taking the drive device connected to the first connecting shaft 303 as an example, after the drive device is started, it drives the first connecting shaft 303 to rotate the first track wheel 7. The first track wheel 7 and the first wheel 501 thus drive the first wheel 501 and the axle 503 to rotate. The axle 503 can drive the second wheel 502 to rotate synchronously. Since the second track wheel 8 abuts against the second wheel 502, a transmission connection can be achieved between the second track wheel 8 and the first track wheel 7, allowing the second track wheel 8 to rotate synchronously. At the same time, the second track wheel 8 can excite the second wheel 502.

[0027] Preferably, the bogie vibration test bench further includes a coupling 6, with the first connecting shaft 303 and the second connecting shaft 403 respectively connected to the coupling 6. The driving device is connected to the end of the first connecting shaft 303 away from the coupling 6, or the driving device is connected to the end of the second connecting shaft 403 away from the coupling 6, so that the driving device drives the first connecting shaft 303 and the second connecting shaft 403 to rotate synchronously, thereby driving the first track wheel 7 and the second track wheel 8 to rotate synchronously.

[0028] Furthermore, at least one side surface of the first track wheel 7 is provided with a first mark 701 and a second mark 702. The first mark 701 and the second mark 702 are elongated lines, and their lengths extend along the straight line containing the diameter of the first track wheel 7. One end of the first mark 701 points to the axis of the first track wheel 7, and the other end points to one of the crests of the first track wheel 7. One end of the second mark 702 points to the axis of the first track wheel 7, and the other end points to one of the troughs of the first track wheel 7. Optionally, the crest pointed to by the first mark 701 and the trough pointed to by the second mark 702 are adjacent or the closest set of crests and troughs.

[0029] When both sides of the first track wheel 7 are provided with a first mark 701 and a second mark 702, the first marks 701 on both sides are positioned opposite each other, and the second marks 702 on both sides are positioned opposite each other.

[0030] Furthermore, at least one surface of the second track wheel 8 is provided with a third mark and a fourth mark. The third mark and the fourth mark are elongated lines, and their lengths extend along the straight line containing the diameter of the second track wheel 8. One end of the third mark points to the axis of the second track wheel 8, and the other end points to one of the crests of the second track wheel 8. One end of the fourth mark points to the axis of the second track wheel 8, and the other end points to one of the troughs of the second track wheel 8. Optionally, the crest and trough pointed to by the third mark and the trough pointed to by the fourth mark are adjacent or the closest set of crests and troughs. When both surfaces of the second track wheel 8 are provided with the third mark and the fourth mark on both surfaces are positioned opposite each other. By using the first mark 701, the second mark 702, the third mark, and the fourth mark, the relative positions of the first track wheel 7 and the second track wheel 8 in the initial state before testing can be determined and adjusted. This allows the first track wheel 7 to have various phases, such as mutually facing crests, mutually facing troughs, mutually facing crests and troughs, or being set at an angle. This results in the first track wheel 7 exciting the first wheel 501 and the second track wheel 8 exciting the second wheel 502 with various different excitation levels, achieving the effect of arbitrary phase wheel-rail coupling excitation for the first wheel 501 and the second wheel 502 of the bogie 5 under test. It should be noted that the first track wheel 7 and the second track wheel 8 have the first mark 701, the second mark 702, the third mark, and the fourth mark on their walls, which are at least facing each other.

[0031] Furthermore, the detection device includes two detection components 2, which have the same structure and are spaced apart along the length of the base platform 1. One detection component 2 is located below the first fixed seat 3 and connected to the base platform 1, while the other detection component 2 is located below the second fixed seat 4 and connected to the base platform 1.

[0032] The detection component 2 specifically includes an upper mounting plate 201, a lower mounting plate 202, and a detection element 203. The upper mounting plate 201 and lower mounting plate 202 are spaced apart vertically. One upper mounting plate 201 of the detection component 2 is connected to the first fixed plate 306, and the other upper mounting plate 201 of the detection component 2 is connected to the second fixed plate 406. The connection method can be, but is not limited to, using bolts and nuts for locking. The lower mounting plate 202 is connected to the base platform 1. The detection element 203 is disposed between the upper mounting plate 201 and the lower mounting plate 202. Specifically, the detection element 203 is a common three-component sensor in the prior art, capable of detecting the frequency and magnitude of the change in the interaction force between the first track wheel 7 and the first wheel 501, and between the second track wheel 8 and the second wheel 502, during the operation of the bogie vibration test bench.

[0033] Preferably, the bearing surface 101 of the base platform 1 is provided with a slide groove 102, the length of which extends along the length direction of the bearing surface 101. The slide groove 102 is provided with an insertion interface 103, which is located on the bearing surface 101 and communicates with the slide groove 102. The width of the insertion interface 103 is smaller than the width of the slide groove 102. This bogie vibration test bench also includes multiple connecting rods 204 and locking components. One end of each connecting rod 204 is located within the slide groove 102, and a limiting part is provided at the end of the connecting rod 204 within the slide groove 102. The width of the limiting part is greater than the width of the insertion interface 103, allowing the connecting rod 204 to be limited within the slide groove 102. The outer surface of the connecting rod 204 is provided with external threads. The lower mounting plate 202 of the detection assembly 2 is provided with a through hole. The end of the connecting rod 204 away from the limiting part passes through the through hole and is locked using a locking component. The body is a nut, and the locking part and the connecting rod 204 are detachably connected through a matching thread. After the locking part and the connecting rod 204 are loosened, the relative position of the detection component 2 and the slide 102 can be adjusted, so that the two detection components 2 and the first fixed seat 3 and the second fixed seat 4 supported by them can move along the length direction of the base platform 1, thereby adjusting the relative position between the first track wheel 7 and the second track wheel 8, ensuring that the first track wheel 7 can contact the first wheel 501 and the second track wheel 8 can contact the second wheel 502.

[0034] Preferably, there are multiple slide grooves 102, which are spaced apart along the width direction of the bearing surface 101. Each slide groove 102 is provided with a connecting rod 204. There are multiple connecting rods 204. The lower mounting plate 202 is provided with connecting rods 204 on both sides along the length direction of the bearing surface 101. This ensures the stability of the detection component 2, the first fixed seat 3, and the second fixed seat 4 on the foundation platform 1 while achieving a detachable connection between the detection component 2 and the foundation platform 1. This also ensures the stability of the first track wheel 7 and the second track wheel 8 during rotation.

[0035] Furthermore, the bogie vibration test rig also includes a fixing component (not shown in the figure), which is positioned above the first track wheel 7 and the second track wheel 8. The bogie 5 to be tested is detachably mounted on the fixing component. Optionally, the fixing component may be, but is not limited to, a bracket.

[0036] As can be seen, by setting two non-circular track wheels in this bogie vibration test rig to abut against the wheels of the bogie 5 under test, and by adjusting the positions of the crests and troughs of the two track wheels to be directly opposite each other, the phase of the two track wheels can be adjusted to achieve the required phase state. Thus, after the bogie vibration test rig is started to make the two track wheels rotate synchronously, the high-frequency vibration test of the bogie in any phase can be stably performed. The detection results of the detection device can be used to identify the working modal parameters of the bogie 5 under test and to acquire vibration and strength data. This provides technical support for the structural design of rail transit bogies and the safe, high-speed and reliable operation of vehicles, and promotes the further development of rail transit vehicles.

[0037] In summary, this bogie vibration test bench can serve as an arbitrary phase excitation source for high-frequency vibration testing of bogies, verifying the high-frequency response of bogies and vehicle components under arbitrary phase excitation, including vibration, strength, and operating modes. It not only meets the forward design requirements of bogies under anti-phase high-frequency vibration service conditions, but also provides a theoretical basis for bench and track testing, fundamentally solving the source quality problems caused by high-frequency vibration.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A bogie vibration test bench for a bogie to be tested, the bogie to be tested comprising at least wheels, characterized in that, The bogie vibration test bench includes: Basic platform; The detection device is mounted on the base platform; A fixing device, wherein the fixing device is disposed on the detection device; A first track wheel is rotatably mounted on the fixing device; The second track wheel is rotatably mounted on the fixing device and is spaced apart from the first track wheel; the first track wheel and the second track wheel can contact the wheel on the side of the bogie; The first track wheel and the second track wheel are respectively provided with excitation edges, and the excitation edges include multiple continuous and alternately arranged peaks and troughs; the first track wheel and the second track wheel have multiple phase positions.

2. The bogie vibration test bench according to claim 1, characterized in that, The first track wheel includes: A first mark, one end of which points to the axis of the first track wheel, and the other end of which points to one of the crests of the first track wheel; A second mark, one end of which points to the axis of the first track wheel, and the other end of which points to one of the troughs of the first track wheel.

3. The bogie vibration test bench according to claim 1, characterized in that, The second track wheel includes: A third mark, one end of which points to the axis of the second track wheel, and the other end of which points to one of the crests of the second track wheel; A fourth mark, one end of which points to the axis of the second track wheel, and the other end of which points to one of the troughs of the second track wheel.

4. The bogie vibration test bench according to claim 1, characterized in that, The fixing device includes: A first fixed base, wherein the first track wheel is rotatably disposed on the first fixed base; The second fixed seat is spaced apart from the first fixed seat, and the second track wheel is rotatably mounted on the second fixed seat; A driving device for driving the first track wheel and the second track wheel to rotate.

5. The bogie vibration test bench according to claim 4, characterized in that, The first fixing base includes: First fixing plate; A first support is disposed on the first fixing plate; The second support is disposed on the first fixing plate, and the first support and the second support are spaced apart; A first connecting shaft is rotatably disposed on the first support and the second support; a first track wheel is disposed on the first connecting shaft and is located between the first support and the second support.

6. The bogie vibration test bench according to claim 5, characterized in that, The second fixing base includes: Second fixing plate; The third support is disposed on the second fixing plate; The fourth support is disposed on the second fixing plate, and the third support is disposed at a distance from the fourth support; A second connecting shaft is rotatably disposed on the third support and the fourth support; a second track wheel is disposed on the second connecting shaft and is located between the third support and the fourth support; The drive device is connected to the first connecting shaft or the second connecting shaft.

7. The bogie vibration test bench according to claim 6, characterized in that, The bogie vibration test bench also includes a coupling, through which the first track wheel and the second track wheel are connected.

8. The bogie vibration test bench according to claim 4, characterized in that, The detection device includes two detection components, which are spaced apart on the base platform. One of the detection components is located below the first fixing base, and the other detection component is located below the second fixing base.

9. The bogie vibration test bench according to claim 8, characterized in that, The detection component includes: An upper mounting plate, which is connected to the fixing device; A lower mounting plate, which is connected to the base platform; A detection component is disposed between the upper mounting plate and the lower mounting plate.

10. The bogie vibration test bench according to claim 9, characterized in that, The base platform has a bearing surface, and the lower mounting plate is slidably connected to the bearing surface.

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