Fatigue vibration coupling test system for contact network positioner

Abstract

The invention discloses a contact network positioner fatigue vibration coupling test system, which belongs to the technical field of test equipment and comprises a supporting unit, a positioning frame, a driving assembly and a restraining assembly. The supporting unit comprises a first supporting column, a second supporting column, a bottom plate and a top plate. The positioning frame is connected with the first supporting column and can rotate around the vertical direction relative to the first supporting column. The driving assembly comprises a first driving device, the first driving device is used for driving a second driving device to move in the first horizontal direction, and the output end of the second driving device, a first connecting rope, a vertical displacement sensor, a second connecting rope, a vertical force sensor and a third connecting rope are sequentially connected. The third connecting rope is used for being connected with a fixing hook of the contact network positioner needing to be tested; the restraining assembly comprises a contact line, a terminal anchoring line clamp, a fourth connecting rope, a fifth connecting rope, a first force sensor and a second force sensor. The test accuracy is improved by simulating coupling of transverse fatigue, horizontal swing and longitudinal vibration of the tested workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of test equipment, in particular to a fatigue vibration coupling test system for a contact network positioner. Background Art

[0002] In electrified railway overhead contact systems, the overhead contact locator, as a key component of the positioning device, bears the important responsibility of fixing the contact line position. It must ensure that the contact line is always within the operating trajectory of the pantograph slide to prevent the pantograph from detaching from the contact line. At the same time, it transmits the horizontal load of the contact line to the support. Its position and state directly guarantee the normal operation of the overhead contact network. In high-speed overhead contact network scenarios, the overhead contact locator is connected to the positioning support via a hook-and-loop structure. This connection must withstand both lateral fatigue impact relative to the center of the line and the longitudinal vibration caused by the pantograph rising and falling due to the passing train, resulting in frequent fatigue wear of the connection during service. Therefore, it is very important to test the overhead contact locator to detect its lateral fatigue performance and longitudinal vibration performance to ensure its reliability.

[0003] Current testing methods typically involve conducting fatigue and vibration tests on catenary locators using separate test rigs. If both fatigue and vibration tests are required, the test sequence is to complete the vibration test first, followed by the fatigue test if it passes. The vibration test utilizes a constant-amplitude vibration method, applying catenary tension and the test frequency. Fatigue testing typically utilizes a pull-and-pull fatigue test method, applying a sinusoidal load, with up to 500,000 test cycles.

[0004] However, this approach of conducting vibration and fatigue tests independently presents numerous drawbacks. For one thing, it fails to simulate the coupling of lateral fatigue and longitudinal vibration in actual operating conditions, and the interaction between vibration and fatigue in the catenary locator is not fully considered, leading to errors in the test results. Furthermore, the test requires repeated manual transport of specimens to different test devices, which not only causes significant inconvenience for the staff but also results in significant labor waste and extremely low work efficiency. Furthermore, the test control parameters of existing test systems differ significantly from those used in actual service, making them unable to effectively reflect the actual service conditions of the catenary locator. For example, current vibration tests only achieve the lifting and lowering of the catenary, while fatigue tests only simulate the lateral displacement of the catenary locator. These two tests are independent of each other and almost completely ignore the synergistic correlation between vibration and fatigue during service. Furthermore, test control parameters such as the catenary locator hook rotation angle differ significantly from field conditions, resulting in significant deviations in the test results and severely reducing the accuracy of the test. Summary of the Invention

[0005] The purpose of the present invention is to provide a fatigue vibration coupling test system for a contact network locator to solve the problems existing in the above-mentioned prior art, realize the simulation of the coupling of lateral fatigue and longitudinal vibration in the actual working conditions of the contact network locator, test and detect the comprehensive performance of the contact network locator under the actual coupling conditions of lateral fatigue and longitudinal vibration, and improve the accuracy of the contact network locator test.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a contact network positioner fatigue vibration coupling test system, comprising:

[0008] A support unit, the support unit comprising a first support, a second support, a bottom plate, and a top plate, the first support and the second support being both vertically arranged, and the top plate and the bottom plate being both horizontally arranged; the first support and the second support being both fixedly connected to the bottom plate at their bottom ends and to the top plate at their top ends, and the first support and the second support being spaced apart;

[0009] a positioning frame connected to the first pillar and capable of rotating in a vertical direction relative to the first pillar, the positioning frame being provided with a hook groove for hooking with a positioning hook of a contact network positioner to be tested;

[0010] a drive assembly, the drive assembly comprising a first drive device, a second drive device, a vertical displacement sensor, and a vertical force sensor, the first drive device being fixedly connected to the top plate, the first drive device being used to drive the second drive device to move along a first horizontal direction, wherein the first horizontal direction is perpendicular to the length direction of the contact network locator to be tested, the vertical displacement sensor being connected to an output end of the second drive device via a first connecting rope, the second drive device being used to drive the first connecting rope to move along a vertical direction, the vertical force sensor being connected to the vertical displacement sensor via a second connecting rope, the vertical force sensor being further fixedly connected to one end of a third connecting rope, the other end of the third connecting rope being used to connect to a fixed hook of the contact network locator to be tested;

[0011] A constraint assembly, the constraint assembly includes a contact wire, a terminal anchoring wire clamp and a fourth connecting rope with one end fixed to the terminal anchoring wire clamp, the contact wire is used to connect the positioning wire clamp of the contact network locator to be tested with the terminal anchoring wire clamp, the other end of the fourth connecting rope is connected to the first force sensor, the first force sensor is connected to the second pillar through the fifth connecting rope, the fourth connecting rope and the fifth connecting rope are both elastic ropes; a first displacement sensor is provided on the terminal anchoring wire clamp.

[0012] Preferably, the positioning frame includes a horizontal positioning tube, an oblique positioning tube and a positioning support, the horizontal positioning tube is provided with a connecting seat, one end of the oblique positioning tube is connected to the connecting seat, and the other end is rotatably connected to the first pillar, and one end of the horizontal positioning tube is rotatably connected to the first pillar; the positioning support is fixedly connected to the horizontal positioning tube, and the hook groove is provided on the positioning support.

[0013] Preferably, a first support and a second support are fixedly provided on the first pillar, and a first connecting block is fixedly connected to the end of the oblique positioning tube away from the connecting seat, and the first connecting block is rotatably connected to the first support through a first pin; a second connecting block is fixedly connected to the end of the horizontal positioning tube close to the first pillar, and the second connecting block is rotatably connected to the second support through a second pin, and the first pin and the second pin are both vertically arranged.

[0014] Preferably, it further comprises a laser goniometer arranged on the base plate, wherein the laser goniometer is used to detect the angle of the contact network locator to be tested.

[0015] Preferably, the output end of the first driving device can reciprocate along the first horizontal direction, and the output end of the second driving device can reciprocate along the vertical direction.

[0016] Preferably, both the first driving device and the second driving device adopt hydraulic cylinders.

[0017] Preferably, the first pillar, the second pillar, the bottom plate and the top plate are all made of metal.

[0018] Preferably, a control unit is further included, and the vertical displacement sensor, the vertical force sensor, the first force sensor, the first displacement sensor and the laser goniometer are respectively connected to the control unit by signal, and the control unit can control the operation of the first drive device and the second drive device.

[0019] Preferably, the control unit is a computer.

[0020] Preferably, the second driving device is fixedly connected to the output end of the first driving device via a connecting frame.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The contact network locator fatigue vibration coupling test system of the present invention is equipped with a driving component and a constraint component. The first driving device can drive the contact network locator to swing in the horizontal direction, and the second driving device can drive the contact network locator to vibrate in the longitudinal direction. At the same time, the contact line, the elastic fourth connecting rope, the fifth connecting rope and other structures in the constraint component can simulate the lateral fatigue impact, thereby realizing the simulation of the coupling of lateral fatigue, horizontal swing and longitudinal vibration in the actual working conditions of the contact network locator, fully considering the interaction between the three, and effectively avoiding the error in the test results caused by not simulating the actual coupling working conditions, and can more realistically reflect the working status of the contact network locator in actual service, thereby improving the accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a structural schematic diagram of the contact network positioner fatigue vibration coupling test system of the present invention;

[0025] In the figure: 1. Top plate; 2. Bottom plate; 3. First pillar; 4. Second pillar; 5. First driving device; 6. Connecting frame; 7. Second driving device; 8. First connecting rope; 9. Vertical displacement sensor; 10. Second connecting rope; 11. Vertical force sensor; 12. Third connecting rope; 13. Fixing hook; 14. Positioning clamp; 15. Contact wire; 16. Terminal anchoring clamp; 17. First displacement sensor; 18. Fourth connecting rope; 19. First force sensor; 20. Fifth connecting rope; 21. Contact network locator; 22. Positioning hook; 23. Positioning support; 24. Horizontal positioning tube; 25. Second connecting block; 26. Second pin; 27. Second support; 28. Connecting seat; 29. Oblique positioning tube; 30. First connecting block; 31. First pin; 32. First support; 33. Laser goniometer. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide a fatigue vibration coupling test system for a contact network locator to solve the problems existing in the above-mentioned prior art, realize the simulation of the coupling of lateral fatigue and longitudinal vibration in the actual working conditions of the contact network locator, test and detect the comprehensive performance of the contact network locator under the actual coupling conditions of lateral fatigue and longitudinal vibration, and improve the accuracy of the contact network locator test.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 As shown, this embodiment provides a fatigue vibration coupling test system for a contact network positioner 21, comprising:

[0030] The support unit includes a first support 3, a second support 4, a bottom plate 2, and a top plate 1. The first support 3 and the second support 4 are both vertically arranged, and the top plate 1 and the bottom plate 2 are both horizontally arranged. The bottom ends of the first support 3 and the second support 4 are fixedly connected to the bottom plate 2 and the top ends are fixedly connected to the top plate 1. The first support 3 and the second support 4 are spaced apart.

[0031] A positioning frame connected to the first support 3 and capable of rotating in a vertical direction relative to the first support 3. The positioning frame is provided with a hook groove for hooking with the positioning hook 22 of the contact network positioner 21 to be tested;

[0032] A drive assembly, the drive assembly includes a first drive device 5, a second drive device 7, a vertical displacement sensor 9 and a vertical force sensor 11. The first drive device 5 is fixedly connected to the top plate 1. The first drive device 5 is used to drive the second drive device 7 to move along a first horizontal direction, and the first horizontal direction is perpendicular to the length direction of the contact network locator 21 to be tested. The vertical displacement sensor 9 is connected to the output end of the second drive device 7 through a first connecting rope 8. The second drive device 7 is used to drive the first connecting rope 8 to move in the vertical direction. The vertical force sensor 11 is connected to the vertical displacement sensor 9 through a second connecting rope 10. The vertical force sensor 11 is also fixedly connected to one end of a third connecting rope 12. The other end of the third connecting rope 12 is used to connect to a fixed hook 13 of the contact network locator 21 to be tested;

[0033] The constraint assembly includes a contact wire 15, a terminal anchoring clamp 16 and a fourth connecting rope 18 having one end fixed to the terminal anchoring clamp 16. The contact wire 15 is used to connect the positioning clamp 14 of the contact network locator 21 to be tested with the terminal anchoring clamp 16. The other end of the fourth connecting rope 18 is connected to the first force sensor 19. The first force sensor 19 is connected to the second pillar 4 through the fifth connecting rope 20. The fourth connecting rope 18 and the fifth connecting rope 20 are both elastic ropes. A first displacement sensor 17 is provided on the terminal anchoring clamp 16.

[0034] In the optional scheme of this embodiment, it is more preferred that the positioning frame includes a horizontal positioning tube 24, an oblique positioning tube 29 and a positioning support 23, and a connecting seat 28 is provided on the horizontal positioning tube 24, one end of the oblique positioning tube 29 is connected to the connecting seat 28, and the other end is rotatably connected to the first pillar 3, and one end of the horizontal positioning tube 24 is rotatably connected to the first pillar 3; the positioning support 23 is fixedly connected to the horizontal positioning tube 24, and the hook groove is provided on the positioning support 23; the structure of the positioning frame is simple, and a stable triangular connection structure is formed between the horizontal positioning tube 24, the oblique positioning tube 29 and the first pillar 3, and the stability is good; the oblique positioning tube 29 and the horizontal positioning tube 24 are rotatably connected to the first pillar 3, so that the first drive device 5 can smoothly drive the contact network locator 21 to swing in the horizontal direction.

[0035] Specifically, a first support 32 and a second support 27 are fixedly provided on the first pillar 3, and a first connecting block 30 is fixedly connected to the end of the oblique positioning tube 29 away from the connecting seat 28, and the first connecting block 30 is rotatably connected to the first support 32 through a first pin shaft 31; a second connecting block 25 is fixedly connected to the end of the horizontal positioning tube 24 close to the first pillar 3, and the second connecting block 25 is rotatably connected to the second support 27 through a second pin shaft 26, and the first pin shaft 31 and the second pin shaft 26 are both vertically arranged.

[0036] In the optional scheme of this embodiment, it is more preferred to further include a laser goniometer 33 arranged on the base plate 2, and the laser goniometer 33 is used to detect the angle of the contact network locator 21 that needs to be tested; the setting of the laser goniometer 33 can detect the angle of the contact network locator 21 that needs to be tested, and cooperate with other sensors to comprehensively detect the comprehensive performance of the contact network locator 21 under the actual coupling conditions of lateral fatigue, horizontal swing and longitudinal vibration from multiple angles, obtain richer and more accurate test data, and provide more powerful support for the performance evaluation and improvement of the contact network locator 21.

[0037] In an optional solution of this embodiment, it is more preferred that the output end of the first driving device 5 can reciprocate along the first horizontal direction, and the output end of the second driving device 7 can reciprocate along the vertical direction.

[0038] In the optional scheme of this embodiment, it is more preferred that the materials of the first pillar 3, the second pillar 4, the bottom plate 2 and the top plate 1 are all metal; the first pillar 3 and the second pillar 4 need to support the positioning frame and various forces during the test, the bottom plate 2 needs to bear the weight of the entire system, and the top plate 1 needs to withstand the force applied by components such as the drive assembly; the use of metal materials can ensure that the first pillar, the second pillar 4, the bottom plate 2 and the top plate 1 will not be excessively deformed or damaged due to the force during the test, thereby ensuring the stability of the system structure and providing a reliable basis for accurate testing.

[0039] Among the optional solutions of this embodiment, a preferred embodiment further includes a control unit. The vertical displacement sensor 9, vertical force sensor 11, first force sensor 19, first displacement sensor 17, and laser goniometer 33 are each connected to the control unit for signal communication. The control unit is capable of controlling the operation of the first drive unit 5 and the second drive unit 7. By receiving detection signals from the vertical displacement sensor 9, vertical force sensor 11, first force sensor 19, first displacement sensor 17, and laser goniometer 33 through the control unit, personnel can adjust various parameters based on the detected parameter values and actual needs, thus providing ease of use. In this embodiment, the control unit utilizes a computer, which is typically equipped with a graphical user interface. Operators can intuitively operate the test system using input devices such as a mouse and keyboard, such as by starting or stopping a test, setting parameters, and selecting a test mode. Compared to traditional hardware control methods, the computer interface is more user-friendly, lowering the technical requirements for operators and improving operational convenience and efficiency.

[0040] In this embodiment, the second driving device 7 is fixedly connected to the output end of the first driving device 5 via the connecting frame 6 .

[0041] The specific working principle of the contact network positioner fatigue vibration coupling test system of this embodiment is as follows:

[0042] During the test, when the first drive device 5 is working, it drives the second drive device 7, the first connecting rope 8, the second connecting rope 10, the third connecting rope 12, the contact network positioner 21 and the positioning frame to swing horizontally. When the contact network positioner 21 swings horizontally, it drives the connection between the positioning hook 22 and the positioning support 23 to swing horizontally, so as to simulate the actual wear process of the horizontal swing of the contact network positioner 21; and when the second drive device 7 is working, it drives the first connecting rope 8, the second connecting rope 10, the third connecting rope 12 and the contact network positioner 21 to swing longitudinally. When the contact network positioner 21 swings longitudinally, it drives the connection between the positioning hook 22 and the positioning support 23 to swing longitudinally, so as to simulate the actual wear process of the positioner lifting and falling. The vertical force sensor 11 and the vertical displacement sensor 9 are used to monitor the longitudinal dynamic load and displacement changes of the positioner, and the angle change of the contact network positioner 21 is monitored by the goniometer. At the same time, the fifth connecting rope 20 and the fourth connecting rope 18 are used to apply a restraining force to simulate the actual fatigue process of the contact network locator 21 during lateral impact, and the first displacement sensor 17 and the first force sensor 19 are used to monitor the horizontal displacement and dynamic load changes of the locator.

[0043] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A fatigue vibration coupling test system for a contact network positioner, characterized in that: include: A support unit, the support unit comprising a first support, a second support, a bottom plate, and a top plate, the first support and the second support being both vertically arranged, and the top plate and the bottom plate being both horizontally arranged; the first support and the second support being both fixedly connected to the bottom plate at their bottom ends and to the top plate at their top ends, and the first support and the second support being spaced apart; a positioning frame connected to the first pillar and capable of rotating in a vertical direction relative to the first pillar, the positioning frame being provided with a hook groove for hooking with a positioning hook of a contact network positioner to be tested; a drive assembly, the drive assembly comprising a first drive device, a second drive device, a vertical displacement sensor, and a vertical force sensor, the first drive device being fixedly connected to the top plate, the first drive device being used to drive the second drive device to move along a first horizontal direction, wherein the first horizontal direction is perpendicular to the length direction of the contact network locator to be tested, the vertical displacement sensor being connected to an output end of the second drive device via a first connecting rope, the second drive device being used to drive the first connecting rope to move along a vertical direction, the vertical force sensor being connected to the vertical displacement sensor via a second connecting rope, the vertical force sensor being further fixedly connected to one end of a third connecting rope, the other end of the third connecting rope being used to connect to a fixed hook of the contact network locator to be tested; A constraint assembly, the constraint assembly includes a contact wire, a terminal anchoring wire clamp and a fourth connecting rope with one end fixed to the terminal anchoring wire clamp, the contact wire is used to connect the positioning wire clamp of the contact network locator to be tested with the terminal anchoring wire clamp, the other end of the fourth connecting rope is connected to the first force sensor, the first force sensor is connected to the second pillar through the fifth connecting rope, the fourth connecting rope and the fifth connecting rope are both elastic ropes; a first displacement sensor is provided on the terminal anchoring wire clamp.

2. The contact line positioner fatigue vibration coupling test system according to claim 1, characterized in that: The positioning frame includes a horizontal positioning tube, an oblique positioning tube and a positioning support. The horizontal positioning tube is provided with a connecting seat. One end of the oblique positioning tube is connected to the connecting seat and the other end is rotatably connected to the first pillar. One end of the horizontal positioning tube is rotatably connected to the first pillar. The positioning support is fixedly connected to the horizontal positioning tube, and the hook groove is provided on the positioning support.

3. The contact line positioner fatigue vibration coupling test system according to claim 2, characterized in that: A first support and a second support are fixedly provided on the first pillar, and a first connecting block is fixedly connected to the end of the oblique positioning tube away from the connecting seat, and the first connecting block is rotatably connected to the first support through a first pin; a second connecting block is fixedly connected to the end of the horizontal positioning tube close to the first pillar, and the second connecting block is rotatably connected to the second support through a second pin, and the first pin and the second pin are both vertically arranged.

4. The contact line positioner fatigue vibration coupling test system according to claim 1, characterized in that: It also includes a laser goniometer arranged on the base plate, and the laser goniometer is used to detect the angle of the contact network locator that needs to be tested.

5. The contact network positioner fatigue vibration coupling test system according to claim 1, characterized in that: The output end of the first driving device can reciprocate along the first horizontal direction, and the output end of the second driving device can reciprocate along the vertical direction.

6. The contact line positioner fatigue vibration coupling test system according to claim 1, characterized in that: The first driving device and the second driving device both adopt hydraulic cylinders.

7. The contact line positioner fatigue vibration coupling test system according to claim 1, characterized in that: The first pillar, the second pillar, the bottom plate and the top plate are all made of metal.

8. The contact line positioner fatigue vibration coupling test system according to claim 4, characterized in that: It also includes a control unit, and the vertical displacement sensor, the vertical force sensor, the first force sensor, the first displacement sensor and the laser goniometer are respectively connected to the control unit by signal, and the control unit can control the operation of the first drive device and the second drive device.

9. The contact network positioner fatigue vibration coupling test system according to claim 8, characterized in that: The control unit adopts a computer.

10. The contact line positioner fatigue vibration coupling test system according to claim 1, characterized in that: The second driving device is fixedly connected to the output end of the first driving device through a connecting frame.

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