High-frequency testing device for primary steel spring of bogie

Abstract

The invention discloses a high-frequency test device for a primary steel spring of a bogie in the field of suspension test devices, which is used for testing a hydraulic shock absorber and a steel spring and comprises a mounting frame fixedly arranged on a test platform; the test assembly is used for fixing the hydraulic shock absorber and the steel spring, and the test assembly is movably connected with the mounting rack; the vibration assembly and the test assembly are in pre-tightening contact; the conversion assembly is fixedly arranged on the test platform and is in transmission connection with the vibration assembly; the driving assembly is also fixedly arranged on the test platform; the detection module is arranged on the steel spring and the hydraulic shock absorber; the device has the advantages that the steel spring and the hydraulic shock absorber are connected through the rotating arm, the installation environment of the primary suspension on a train can be simulated more truly, high frequency can be achieved through rotation of the regular polygon vibrating wheel, vibration feedback between the primary suspension and a rail in the train running process can be simulated, the structure is simple, and the device is convenient to use. And the test is convenient and more accurate.

Description

Technical Field

[0001] The invention relates to the field of suspension test devices, and in particular to a high-frequency test device for a primary steel spring of a bogie. Background Art

[0002] Since most of the vibration of the bogie comes from the vibration of the wheel-rail, and the primary suspension of the EMU (hydraulic shock absorber and steel spring) has the function of absorbing and mitigating vibration, there are high requirements on the performance of the hydraulic shock absorber and steel spring, and it is necessary to test and evaluate the performance of the hydraulic shock absorber and steel spring.

[0003] There are many test devices for suspension at present, but most of them test the hydraulic shock absorber and steel spring separately, which cannot simulate the stress state of the hydraulic shock absorber and steel spring in the actual operation process more realistically. In addition, the existing test devices cannot provide high-frequency vibration and cannot simulate the vibration of the suspension when the EMU is running at high speed.

[0004] To this end, we propose a high-frequency testing device for the primary steel spring of a bogie. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a high-frequency testing device for a primary steel spring of a bogie.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0007] A high-frequency test device for a first-series steel spring of a bogie is used for testing a hydraulic shock absorber and a steel spring, comprising: a mounting frame, fixedly arranged on a test platform and used for mounting the hydraulic shock absorber and the steel spring; a test assembly, used for fixing the hydraulic shock absorber and the steel spring, the test assembly and the mounting frame being movably connected to realize feedback of vibrations received by the hydraulic shock absorber and the steel spring; a vibration assembly, pre-tightened in contact with the test assembly and providing high-frequency vibration for the test assembly, the vibration assembly realizing high-frequency vibration by rotating a vibration wheel in the form of a regular polygon; a conversion assembly, fixedly arranged on the test platform and transmission-connected with the vibration assembly, the conversion assembly being used for adjusting the direction, speed and torque of power provided by a power source; a drive assembly, also fixedly arranged on the test platform and serving as a power source to provide power for the conversion assembly; a detection module, arranged on the steel spring and the hydraulic shock absorber, the detection module being used for collecting the forces received by the steel spring and the hydraulic shock absorber, and collecting the displacement of the steel spring.

[0008] By setting up the test components to fix the hydraulic shock absorber and the steel spring together on the mounting frame, it is possible to simulate the states of the steel spring and the hydraulic shock absorber during actual use, making the test results more accurate. And by rotating the regular polygon wheel to achieve high-frequency vibration of the test components to simulate the vibration received by the primary suspension during the running of the bullet train, it can also effectively improve the accuracy of the test results. Moreover, the force data and displacement data during the test process are collected by the detection module for subsequent calculation of the test results. The structure is simple and easy to use.

[0009] Further defined, the mounting frame includes two columns arranged at intervals and a box girder horizontally connected between the two columns.

[0010] Further defined, the test components include a rotating arm, a hinge seat and a force-bearing wheel; the hinge seat is arranged at one end of the rotating arm, the rotating arm is rotatably connected to the inner side of one column through the hinge seat, the force-bearing wheel is rotatably connected below the free end of the rotating arm, the steel spring is vertically fixed on the rotating arm at the corresponding position of the center of the force-bearing wheel, and the hydraulic shock absorber is vertically fixed on the rotating arm on one side of the steel spring; by setting up the rotating arm and rotatably connecting one end of the rotating arm to the vertical pole through the hinge seat, and realizing force feedback through the contact between the force-bearing wheel and the vibration components, both the hydraulic shock absorber and the steel spring are connected to the rotating arm to simulate the use state of the primary suspension. The structure is simple and convenient to install.

[0011] Further defined, the vibration components include a vibration wheel, a rotating shaft and a bearing seat; the vibration wheel is fixedly sleeved on the rotating shaft, both ends of the rotating shaft are respectively rotatably connected to a bearing seat, and one end passes through the bearing seat and is connected to the conversion components. The vibration wheel is a regular polygon wheel; by setting up the connection between the rotating shaft and the conversion components to transmit power to the vibration wheel to make the vibration wheel rotate, the vibration wheel is in a pre-tight contact state with the force-bearing wheel when not started. In this way, when the vibration wheel rotates, the force-bearing wheel will jump up and down to simulate the high-frequency vibration of the hydraulic shock absorber and the steel spring.

[0012] Further defined, the conversion components include a gearbox, the input shaft and the output shaft of the gearbox are vertically arranged, the input shaft of the gearbox is fixedly connected to the driving components, and the output shaft is fixedly connected to the rotating shaft; by using the gearbox to realize the steering of the power, it can avoid the problem of too long transmission distance and too large occupied space.

[0013] Further defined, the driving components include a driving motor and a motor seat, the driving motor is fixedly arranged on the motor seat, and the motor seat is fixedly arranged on the test platform.

[0014] Further defined, the steel spring is fixedly connected to the swing arm through a spring support. The spring support includes an upper plate, a lower plate, and fixing bolts vertically connecting the upper plate and the lower plate. A through-column is provided at the center of the lower plate. The steel spring is fixed between the upper plate and the lower plate through the through-column. Installation wing plates are provided at both ends of the box girder. A plurality of installation holes are vertically spaced on the inner side of the vertical rod. Through holes for bolts to pass through are also provided at the positions corresponding to the installation holes on the installation wing plates. The box girder is fixedly connected to the vertical rod through bolts passing through the installation wing plates. A horizontal connecting plate is provided on the end face of the free end of the swing arm. The bottom end of the hydraulic shock absorber is rotatably connected to the connecting plate, and the top end is fixedly connected to the box girder through an adjusting screw.

[0015] The steel spring is fixed by the spring support. The pre-tightening degree of the steel spring can be adjusted by adjusting the screwing depth of the nut on the fixing bolt and the installation height of the box girder. And the hydraulic shock absorber is fixed by the adjusting screw, and the connecting length of the adjusting screw can be adjusted, which is more convenient for installation.

[0016] Further defined, the detection module includes a first force sensor, a second force sensor, and a displacement gauge. The first force sensor is arranged on the upper plate and is also connected to the box girder through an adjusting screw at the top. The second force sensor is arranged between the hydraulic shock absorber and the adjusting screw. The displacement gauge is fixedly arranged on the upper plate through a strip plate. The reflecting plate supporting the displacement gauge is also fixedly arranged on the lower plate through a strip plate, and the displacement gauge and the reflecting plate are arranged oppositely.

[0017] By setting the first force sensor to collect the force data of the steel spring, the second sensor to collect the force data of the hydraulic shock absorber, and the displacement gauge to collect the compression displacement amplitude of the steel spring for subsequent calculation of test results, the installation of the first force sensor, the second force sensor, and the hydraulic shock absorber is simple and convenient.

[0018] The beneficial effects of the present invention are as follows: By setting the swing arm to connect the steel spring and the hydraulic shock absorber, the installation environment of the primary suspension on the train can be more realistically simulated. By rotating the regular polygon vibration wheel to achieve high frequency, the vibration feedback between the primary suspension and the track during the train operation can also be simulated. The structure is simple, the test is convenient, and it is more accurate. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0020] Figure 2 It is a front view of the test assembly;

[0021] Figure 3 It is a front view of the vibration wheel.

[0022] The symbols of each component are as follows:

[0023] Hydraulic shock absorber 1, steel spring 2, mounting bracket 3, column 31, mounting hole 311, box girder 32, mounting wing plate 321, test assembly 4, rotating arm 41, connecting plate 411, hinge seat 42, loading wheel 43, vibration assembly 5, vibration wheel 51, rotating shaft 52, bearing seat 53, conversion assembly 6, drive assembly 7, drive motor 71, motor seat 72, detection module 8, first force sensor 81, second force sensor 82, displacement gauge 83, reflector 84, spring support 9, upper plate 91, lower plate 92, fixing bolt 93, adjusting screw 10. Specific embodiments

[0024] The following describes the specific embodiments of the present invention to facilitate those skilled in the art of the present technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0025] Example:

[0026] As Figures 1 - 3As shown in the figure, a high-frequency test device for the primary steel springs of a bogie is used to test a hydraulic shock absorber 1 and a steel spring 2, and includes a mounting frame 3, a test assembly 4, a vibration assembly 5, a conversion assembly 6, a drive assembly 7, and a detection module 8; the mounting frame 3 is fixedly arranged on the test platform and is used to mount the hydraulic shock absorber 1 and the steel spring 2; the mounting frame 3 includes two upright columns 31 arranged at intervals and a box girder 32 horizontally connected between the two upright columns 31. Installation wing plates 321 are provided at both ends of the box girder 32. A number of mounting holes 311 are vertically spaced on the inner side surface of the upright column. Through holes for bolts to pass through are also provided at the positions corresponding to the mounting holes 311 on the installation wing plates 321. The box girder 32 is fixedly connected to the upright column by bolts passing through the installation wing plates 321; the test assembly 4 is movably connected to the mounting frame 3 to feedback the vibration received by the hydraulic shock absorber 1 and the steel spring 2; the test assembly 4 includes a rotating arm 41, a hinge seat 42, and a force-bearing wheel 43; the hinge seat 42 is arranged at one end of the rotating arm 41. The rotating arm 41 is rotatably connected to the inner side of one upright column 31 through the hinge seat 42. The force-bearing wheel 43 is rotatably connected below the free end of the rotating arm 41. The steel spring 2 is vertically fixed on the rotating arm 41 at the position corresponding to the center of the force-bearing wheel 43. The hydraulic shock absorber 1 is vertically fixed on the rotating arm 41 on one side of the steel spring 2; the steel spring 2 is fixedly connected to the rotating arm 41 through a spring support 9. The spring support 9 includes an upper plate 91, a lower plate 92, and a fixing bolt 93 vertically connecting the upper plate 91 and the lower plate 92. A through column is provided at the center of the lower plate 92. The steel spring 2 is fixed between the upper plate 91 and the lower plate 92 through the through column. A horizontal connecting plate 411 is provided on the end surface of the free end of the rotating arm 41. The bottom end of the hydraulic shock absorber 1 is rotatably connected to the connecting plate 411, and the top end is fixedly connected to the box girder 32 through an adjusting screw 10; the vibration assembly 5 is in pre-tight contact with the test assembly 4 and provides high-frequency vibration for the test assembly 4. The vibration assembly 5 includes a vibration wheel 51, a rotating shaft 52, and a bearing seat 53; the vibration wheel 51 is fixedly sleeved on the rotating shaft 52. The two ends of the rotating shaft 52 are respectively rotatably connected to a bearing seat 53, and one end passes through the bearing seat 53 and is connected to the conversion assembly 6. The vibration wheel 51 is a regular polygon wheel; the conversion assembly 6 is fixedly arranged on the test platform and is in transmission connection with the vibration assembly 5. The conversion assembly 6 is used to adjust the direction, speed, and torque of the power provided by the power source; the conversion assembly 6 includes a gearbox. The input shaft and the output shaft of the gearbox are vertically arranged. The input shaft of the gearbox is fixedly connected to the drive assembly 7, and the output shaft is fixedly connected to the rotating shaft 52; the drive assembly 7 serves as a power source to provide power for the conversion assembly 6; the drive assembly 7 includes a drive motor 71 and a motor seat 72. The drive motor 71 is fixedly arranged on the motor seat 72, and the motor seat 72 is fixedly arranged on the test platform; the detection module 8 is arranged on the steel spring 2 and the hydraulic shock absorber 1. The detection module 8 is used to collect the forces received by the steel spring 2 and the hydraulic shock absorber 1, and to collect the displacements occurring in the steel spring 2;The detection module 8 includes a first force sensor 81, a second force sensor 82, and a displacement gauge 83. The first force sensor 81 is disposed on the upper plate 91, and its top is also connected to the box girder 32 through an adjusting screw 10. The second force sensor 82 is disposed between the hydraulic shock absorber 1 and the adjusting screw 10. The displacement gauge 83 is fixedly disposed on the upper plate 91 through a strip plate. The reflecting plate 84 matching the displacement gauge 83 is also fixedly disposed on the lower plate 92 through a strip plate, and the displacement gauge 83 and the reflecting plate 84 are disposed opposite to each other. In this application, the number of sides of the vibrating wheel 51 can be set according to the required vibration frequency.

[0027] In this application, the first force sensor 81 is an interface125kn force sensor with the model number 1010, the second force sensor 82 is an interface25kn force sensor with the model number 1020, the displacement gauge 83 is a displacement sensor of Panasonic with the model number HG-C1050L3-P, and the signal acquisition system for collecting data of the first force sensor 81, the second force sensor 82, and the displacement gauge 83 is an HBM data collector MX840B.

[0028] By setting the test component 4 to fix the hydraulic shock absorber 1 and the steel spring 2 together on the mounting bracket 3, it is possible to simulate the states of the steel spring 2 and the hydraulic shock absorber 1 during actual use, making the test results more accurate. And by the rotation of the regular polygon wheel to achieve high-frequency vibration of the test component 4 to simulate the vibration received by the primary suspension during the running of the EMU, it can also effectively improve the accuracy of the test results. The force data and displacement data during the test process are collected by the detection module 8 for subsequent calculation of the test results. The structure is simple and easy to use. By setting the swing arm 41 and rotatably connecting one end of the swing arm 41 to the vertical rod through the hinge seat 42, and achieving force feedback through the force wheel 43 contacting with the vibration component 5, both the hydraulic shock absorber 1 and the steel spring 2 are connected to the swing arm 41 to simulate the use state of the primary suspension. The structure is simple and convenient to install. By setting the rotating shaft 52 connected to the conversion component 6 to transmit power to the vibration wheel 51 to make the vibration wheel 51 rotate, the vibration wheel 51 is in a pre-tight contact state with the force wheel 43 when not started. In this way, when the vibration wheel 51 rotates, the force wheel 43 will jump up and down to simulate the high-frequency vibration of the hydraulic shock absorber 1 and the steel spring 2. The power steering is achieved through the gearbox, which can avoid the problem of excessive space occupation due to too long transmission distance. The steel spring 2 is fixed by the spring bracket 9. The pre-tightening degree of the steel spring 2 can be adjusted by adjusting the screwing depth of the nut on the fixing bolt 93 and the installation height of the box girder 32. And the hydraulic shock absorber 1 is fixed by adjusting the screw rod 10, and the connection length of the adjusting screw rod 10 can be adjusted, which is more convenient for installation. By setting the first force sensor 81 to collect the force data of the steel spring 2, the second sensor to collect the force data of the hydraulic shock absorber 1, and the displacement gauge 83 to collect the compression displacement amplitude of the steel spring 2 for subsequent calculation of the test results. In this way, the installation of the first force sensor 81, the second force sensor 82 and the hydraulic shock absorber 1 has a simple structure and is convenient to install.

[0029] Through this experimental device, the dynamic stiffness test of the steel spring 2, the high-frequency damping force-displacement characteristic test of the hydraulic shock absorber 1, the joint dynamic characteristic experiment when the steel spring 2 and the hydraulic shock absorber 1 work together, and the detection test of the hydraulic shock absorber 1 and the steel spring 2 can be carried out. Through the above tests, the dynamic performance of the steel spring 2 and the hydraulic shock absorber 1 in the medium and high frequency bands can be evaluated more comprehensively, ensuring the reliability, comfort and safety of the EMU suspension in a complex vibration environment.

Claims

1. A primary steel spring high-frequency test device for a bogie, which is used to test a hydraulic shock absorber (1) and a steel spring (2), is characterized in that include: A mounting frame (3) fixedly mounted on the test platform and used for mounting the hydraulic shock absorber (1) and the steel spring (2); A test assembly (4) is used to fix the hydraulic shock absorber (1) and the steel spring (2); the test assembly (4) and the mounting frame (3) are movably connected to provide feedback on the vibrations received by the hydraulic shock absorber (1) and the steel spring (2); A vibration assembly (5) is in pre-tightened contact with the test assembly (4) to provide high-frequency vibration for the test assembly (4), wherein the vibration assembly (5) realizes high-frequency vibration by rotating a vibration wheel (51) in the form of a regular polygon; A conversion assembly (6) is fixedly mounted on the test platform and is in transmission connection with the vibration assembly (5), and the conversion assembly (6) is used to adjust the direction, speed and torque of the power provided by the power source; A driving assembly (7) is also fixedly mounted on the test platform and serves as a power source to provide power to the conversion assembly (6); A detection module (8) is arranged on the steel spring (2) and the hydraulic shock absorber (1), and the detection module (8) is used to collect the forces applied to the steel spring (2) and the hydraulic shock absorber (1), and to collect the displacement of the steel spring (2).

2. The primary suspension steel spring high-frequency test device for a bogie according to claim 1, characterized in that The mounting frame (3) comprises two columns (31) arranged at an interval and a box beam (32) horizontally connected between the two columns (31).

3. The primary suspension steel spring high-frequency test device for a bogie according to claim 2, wherein The test assembly (4) comprises a rotating arm (41), an articulated seat (42) and a force-bearing wheel (43); the articulated seat (42) is arranged at one end of the rotating arm (41); the rotating arm (41) is rotatably connected to the inner side of one of the columns (31) through the articulated seat (42); the force-bearing wheel (43) is rotatably connected below the free end of the rotating arm (41); the steel spring (2) is vertically fixed on the rotating arm (41) at a position corresponding to the center of the force-bearing wheel (43); and the hydraulic shock absorber (1) is vertically fixed on the rotating arm (41) at one side of the steel spring (2).

4. The primary suspension steel spring high-frequency test device for the bogie according to claim 3, characterized in that, The vibration assembly (5) comprises a vibration wheel (51), a rotating shaft (52) and a bearing seat (53); the vibration wheel (51) is fixedly mounted on the rotating shaft (52), two ends of the rotating shaft (52) are respectively rotatably connected to one of the bearing seats (53), and one end passes through the bearing seat (53) to be connected to the conversion assembly (6); the vibration wheel (51) is a regular polygonal wheel.

5. The primary suspension steel spring high-frequency test device for the bogie according to claim 4, characterized in that The conversion assembly (6) comprises a gear box, the input shaft and the output shaft of the gear box are arranged vertically, the input shaft of the gear box is fixedly connected to the drive assembly (7), and the output shaft is fixedly connected to the rotating shaft (52).

6. The primary steel spring high-frequency test device for a bogie according to claim 5, characterized in that, The driving assembly (7) comprises a driving motor (71) and a motor seat (72); the driving motor (71) is fixedly arranged on the motor seat (72); and the motor seat (72) is fixedly arranged on the test platform.

7. The primary suspension steel spring high-frequency test device for a bogie according to claim 3, characterized in that, The steel spring (2) is fixedly connected to the swing arm (41) through a spring support (9). The spring support (9) includes an upper plate (91), a lower plate (92), and fixing bolts (93) vertically connecting the upper plate (91) and the lower plate (92). A through-column is provided at the center of the lower plate (92). The steel spring (2) is fixed between the upper plate (91) and the lower plate (92) through the through-column. Installation wing plates (321) are provided at both ends of the box girder (32). A plurality of installation holes (311) are vertically spaced on the inner side surface of the vertical rod. Through holes for bolts to pass through are also provided at the positions corresponding to the installation holes (311) on the installation wing plates (321). The box girder (32) is fixedly connected to the vertical rod by bolts passing through the installation wing plates (321). A horizontal connecting plate (411) is provided on the end surface of the free end of the swing arm (41). The bottom end of the hydraulic shock absorber (1) is rotatably connected to the connecting plate (411), and the top end is fixedly connected to the box girder (32) through an adjusting screw rod (10).

8. The primary suspension steel spring high-frequency test device for a bogie according to claim 7, wherein, The detection module (8) includes a first force sensor (81), a second force sensor (82), and a displacement gauge (83). The first force sensor (81) is provided on the upper plate (91) and is also connected to the box girder (32) through an adjusting screw rod (10) at the top. The second force sensor (82) is provided between the hydraulic shock absorber (1) and the adjusting screw rod (10). The displacement gauge (83) is fixedly provided on the upper plate (91) through a strip plate. A reflecting plate (84) supporting the displacement gauge (83) is also fixedly provided on the lower plate (92) through a strip plate, and the displacement gauge (83) and the reflecting plate (84) are arranged oppositely.

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