High-speed rail shock absorber horizontal fatigue test equipment

Abstract

The invention relates to a high-speed rail shock absorber horizontal fatigue test device which comprises a horizontal test frame, a front mounting plate and a rear mounting plate are oppositely arranged in the horizontal test frame, and the rear mounting plate is horizontally and slidably connected with the horizontal test frame. The front mounting plate and the rear mounting plate are oppositely provided with two sets of shock absorber clamps used for fixing the two ends of a shock absorber, the rear end of the horizontal testing frame is provided with a first driving part, the output end of the first driving part is provided with a rotating disc, and the rotating disc is eccentrically and rotatably connected with a first connecting rod. The end of the first connecting rod is hinged to the rear mounting plate, a piston cylinder is arranged on the inner top wall of the horizontal testing frame, a water inlet pipe and a water outlet pipe are arranged on the piston cylinder, and the water outlet pipe is connected with a sprayer used for conducting water cooling on the tested shock absorber. In the fatigue test process, the shock absorber is cooled through cooling water, the accuracy of the test result is improved, and meanwhile safety accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of fatigue testing of shock absorbers, and in particular to a horizontal fatigue testing device for high-speed rail shock absorbers. Background Art

[0002] In order to ensure the safety and stability of EMU operation, high-speed rail is equipped with shock absorbers. As a vulnerable part in the use of high-speed rail, the performance of the shock absorber will directly affect the stability of high-speed rail operation and the life of other parts. If the shock absorber does not meet the use standards, it will affect the braking, and in serious cases, it will cause high-speed rail control failure and cause safety accidents. Since the shock absorber is in a working state for a long time during the operation of the high-speed rail and produces wear, the service life of the shock absorber product is closely related to its anti-fatigue performance, which is also an important part of the quality control of the shock absorber product.

[0003] The shock absorbers on the high-speed rail are horizontal shock absorbers and axial shock absorbers. The axial shock absorber is mainly used to reduce the vibration of the equipment in the axial direction. It protects the mechanical equipment from damage caused by axial vibration by absorbing and attenuating the axial vibration. The horizontal shock absorber is mainly used to reduce the vibration of the mechanical equipment in the horizontal direction. It protects the equipment from damage caused by horizontal vibration by absorbing and attenuating the vibration in the horizontal direction.

[0004] High-speed rail horizontal shock absorber horizontal fatigue test equipment is needed when performing fatigue testing on high-speed rail horizontal shock absorbers. During the horizontal fatigue test of the shock absorber, the piston in the shock absorber moves back and forth, and the oil flows repeatedly in the cavity. The vibration energy is converted into heat energy through friction and internal friction between oil molecules, thereby attenuating the vibration. If this heat is not dissipated in time, it will cause changes in the performance of the shock absorber material, thereby affecting the accuracy of the test results. In severe cases, it may also cause safety problems, such as fire or other safety accidents. Therefore, it is urgent to design a high-speed rail shock absorber horizontal fatigue test equipment that can cool the horizontal shock absorber during fatigue testing. Summary of the invention

[0005] The embodiment of the present invention provides a high-speed rail shock absorber horizontal fatigue testing equipment, which can solve the problem in the prior art that during the fatigue test of the high-speed rail horizontal shock absorber, the heat cannot be dissipated in time, which will cause the shock absorber material performance to change, thereby affecting the accuracy of the test results, and may even cause safety accidents in serious cases.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a high-speed rail shock absorber horizontal fatigue testing equipment, including a horizontal test frame, a front mounting plate and a rear mounting plate are relatively arranged inside the horizontal test frame, the rear mounting plate is horizontally slidably connected to the horizontal test frame, two groups of shock absorber clamps for fixing the two ends of the shock absorber are relatively arranged on the front mounting plate and the rear mounting plate, a first driving part is arranged at the rear end of the horizontal test frame, a turntable is arranged at the output end of the first driving part, a first connecting rod is eccentrically connected to the turntable for rotation, the end of the first connecting rod is hinged to the rear mounting plate, a piston cylinder is arranged on the inner top wall of the horizontal test frame, a water inlet pipe and a water outlet pipe are arranged on the piston cylinder, the water outlet pipe is connected to a sprayer for water cooling the tested shock absorber, a piston is sealingly and slidably connected to the inside of the piston cylinder, and a piston rod fixedly connected to the rear mounting plate is arranged on the piston.

[0007] Preferably, the water inlet pipe and the water outlet pipe are respectively provided with a one-way valve.

[0008] Preferably, the sprayer comprises an annular spray pipe connected to the water outlet pipe, and a nozzle communicating with the inside of the annular spray pipe is arranged on the inner side of the annular spray pipe.

[0009] Preferably, the nozzles are arranged in an inclined and staggered manner.

[0010] Preferably, the annular spray pipe is provided with a support rod fixedly connected to the rear mounting plate.

[0011] Preferably, a reflux groove is provided at the lower part of the front end of the horizontal test frame, the water inlet pipe is connected to the reflux groove, and a reflux pump and a chiller are provided on the water inlet pipe.

[0012] Preferably, a rectangular groove is radially arranged on the turntable, a first screw rod is rotatably connected inside the rectangular groove, a first screw rod is transmission-connected to a first screw rod nut which is slidably connected to the rectangular groove, a second driving portion with an output end fixedly connected to the first screw rod nut is arranged at the end of the rectangular groove, a cylindrical pin is arranged on the first screw rod nut, and one end of the first connecting rod is rotatably connected to the cylindrical pin.

[0013] Preferably, a partition is vertically arranged inside the horizontal test frame, an avoidance groove is opened on the partition, a first guide rod is arranged between the front end of the horizontal test frame and the partition, a second guide rod and a second screw rod connected end to end are rotatably connected between the front end of the horizontal test frame and the partition, a third driving part with an output end fixedly connected to the second screw rod is arranged at the front end of the horizontal test frame, the rear mounting plate is slidably connected to the first guide rod and the second guide rod, a second screw nut matched with the second screw rod is arranged on the front mounting plate, and the front mounting plate is slidably connected to the first guide rod.

[0014] Preferably, the shock absorber fixture comprises a "U"-shaped seat, and bolts are threadedly connected on both side walls of the "U"-shaped seat.

[0015] Preferably, the "U"-shaped seat at the rear end is hinged on the rear mounting plate, an extension plate is provided on the "U"-shaped seat, a second connecting rod is hinged on the extension plate, a fourth driving part is provided on the rear mounting plate, a third screw rod is provided at the output end of the fourth driving part, a third screw rod is transmission-connected with a third screw rod nut which is slidably connected to the rear mounting plate, and the third screw rod nut is hinged to the end of the second connecting rod.

[0016] Compared with the prior art, the present invention adopts the coordinated arrangement of a horizontal test frame, a front mounting plate, a rear mounting plate, a shock absorber clamp, a first driving part, a turntable, a first connecting rod, a piston cylinder, a water inlet pipe, a water outlet pipe, a sprayer, a piston and a piston rod. When the high-speed rail shock absorber is subjected to a horizontal fatigue test, the two ends of the high-speed rail shock absorber to be tested are respectively fixed on the front mounting plate and the rear mounting plate by means of a clamp, the first driving part drives the turntable to rotate, and the turntable drives the rear mounting plate to perform horizontal reciprocating linear motion through the first connecting rod, and the horizontal fatigue test is performed on the high-speed rail shock absorber. At the same time, the rear mounting plate drives the piston rod to perform horizontal reciprocating linear motion, and the piston rod drives the piston to perform piston motion inside the piston cylinder. Cooling water is drawn through the water inlet pipe and transported to the sprayer through the water outlet pipe. The cooling water sprayed from the sprayer cools the shock absorber, thereby improving the accuracy of the test results and avoiding safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 3 It is a right side structural schematic diagram of the sprinkler of the present invention;

[0020] Figure 4 It is a schematic diagram of the top view of the disc structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the top view of the rear mounting plate of the present invention;

[0022] Figure 6 For the present invention Figure 1 A schematic diagram of the enlarged structure in the middle.

[0023] In the figure: 1. horizontal test frame; 2. front mounting plate; 3. rear mounting plate; 4. first drive unit; 5. turntable; 6. first connecting rod; 7. piston cylinder; 8. water inlet pipe; 9. water outlet pipe; 10. piston; 11. piston rod; 12. annular spray pipe; 13. nozzle; 14. support rod; 15. reflux groove; 16. reflux pump; 17. chiller; 18. rectangular groove; 19. first screw rod; 20. first screw rod nut; 21. second drive unit; 22. partition; 23. first guide rod; 24. second guide rod; 25. second screw rod; 26. second screw rod nut; 27. third drive unit; 28. "U" shaped seat; 29. ​​bolt; 30. extension plate; 31. fourth drive unit; 32. third screw rod; 33. third screw rod nut; 34. second connecting rod; 35. cylindrical pin; 36. avoidance groove. DETAILED DESCRIPTION

[0024] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figure 1 to Figure 6 As shown, a high-speed rail shock absorber horizontal fatigue test equipment comprises a horizontal test frame 1, a front mounting plate 2 and a rear mounting plate 3 are relatively arranged inside the horizontal test frame 1, the rear mounting plate 3 is horizontally slidably connected to the horizontal test frame 1, two groups of shock absorber clamps for fixing the two ends of the shock absorber are relatively arranged on the front mounting plate 2 and the rear mounting plate 3, a first driving part 4 is arranged at the rear end of the horizontal test frame 1, a turntable 5 is arranged at the output end of the first driving part 4, a first connecting rod 6 is eccentrically connected to the turntable 5, and the end of the first connecting rod 6 is hinged to the rear mounting plate 3, a piston cylinder 7 is arranged on the inner top wall of the horizontal test frame 1, a water inlet pipe 8 and a water outlet pipe 9 are arranged on the piston cylinder 7, the water outlet pipe 9 is connected to a sprayer for water cooling the shock absorber under test, a piston 10 is sealingly and slidably connected inside the piston cylinder 7, and a piston rod 11 fixedly connected to the rear mounting plate 3 is arranged on the piston 10.

[0026] During specific use, the two ends of the high-speed rail shock absorber to be tested are fixed on the front mounting plate 2 and the rear mounting plate 3 respectively by clamps, the first driving part 4 drives the turntable 5 to rotate, and the turntable 5 drives the rear mounting plate 3 to perform horizontal reciprocating linear motion through the first connecting rod 6, and a horizontal fatigue test is performed on the high-speed rail shock absorber. The rear mounting plate 3 simultaneously drives the piston rod 11 to perform horizontal reciprocating linear motion, and the piston rod 11 drives the piston 10 to perform piston motion inside the piston cylinder 7. Cooling water is drawn through the water inlet pipe 8 and transported to the sprayer through the water outlet pipe 9. The cooling water sprayed from the sprayer cools the shock absorber.

[0027] In order to achieve the purpose of improving the cooling effect on the shock absorber, preferably, one-way valves are respectively provided on the water inlet pipe 8 and the water outlet pipe 9. The one-way valve on the water inlet pipe 8 only allows cooling water to flow from the water inlet pipe 8 to the piston cylinder 7, while the one-way valve on the water outlet pipe 9 only allows cooling water to flow from the piston cylinder 7 to the water outlet pipe 9, and cuts off the reverse direction, so that the cooling water flows unidirectionally to the sprinkler, preventing the cooling water from flowing back, which is beneficial to improving the cooling effect on the shock absorber.

[0028] In order to achieve the purpose of improving the cooling effect on the shock absorber, preferably, the sprayer includes an annular spray pipe 12 connected to the water outlet pipe 9, and a nozzle 13 connected to the inside of the annular spray pipe 12 is arranged on the inner side of the annular spray pipe 12. The annular spray pipe 12 is arranged in a ring on the outside of the shock absorber, and the nozzle 13 can evenly spray cooling water on the shock absorber, which is beneficial to improving the cooling effect on the shock absorber.

[0029] In order to achieve the purpose of improving the cooling effect on the shock absorber, preferably, the nozzles 13 are arranged in an inclined and staggered manner to increase the contact area between the cooling water and the shock absorber, thereby facilitating improving the cooling effect on the shock absorber.

[0030] In order to achieve the purpose of improving the cooling effect on the shock absorber, preferably, a support rod 14 fixedly connected to the rear mounting plate 3 is provided on the annular spray pipe 12, and the annular spray pipe 12 and the shock absorber move synchronously in the horizontal direction to achieve relative stillness, which is conducive to accurately spraying cooling water on the shock absorber, thereby helping to improve the cooling effect on the shock absorber.

[0031] In order to achieve the purpose of improving the cooling effect on the shock absorber, preferably, a reflux groove 15 is provided at the lower part of the front end of the horizontal test frame 1, and the water inlet pipe 8 is connected to the reflux groove 15. A reflux pump 16 and a chiller 17 are provided on the water inlet pipe 8. The cooling water sprayed from the nozzle 13 flows back to the reflux groove 15, and the reflux pump 16 draws the cooling water in the reflux groove 15 into the chiller 17 for cooling. After cooling, the cooling water is recycled, which is beneficial to saving water resources. Moreover, cooling by the chiller 17 is beneficial to improving the cooling effect on the shock absorber.

[0032] In order to more accurately simulate the operating state of the shock absorber during the operation of the high-speed railway, preferably, a rectangular groove 18 is radially arranged on the turntable 5, and a first screw rod 19 is rotatably connected inside the rectangular groove 18. A first screw nut 20 slidably connected to the rectangular groove 18 is transmission-connected on the first screw rod 19, and a second driving portion 21 is provided at the end of the rectangular groove 18, and an output end is fixedly connected to the first screw nut 20. A cylindrical pin 35 is provided on the first screw nut 20, and one end of the first connecting rod 6 is rotatably connected to the cylindrical pin 35. When the second driving portion 21 is started, it can drive the first screw rod 19 to rotate, and the first screw rod 19 drives the first screw nut 20 to move along the length direction of the first screw rod 19, which can be used to adjust the distance between the cylindrical pin 35 and the central axis of the turntable 5, and then adjust the vibration amplitude of the shock absorber, so as to facilitate the side view of the fatigue strength of the shock absorber under different vibration amplitudes.

[0033] In order to more accurately simulate the operating state of the shock absorber during the operation of the high-speed railway, preferably, a partition 22 is vertically arranged inside the horizontal test frame 1, and an avoidance groove 36 is opened on the partition 22, a first guide rod 23 is arranged between the front end of the horizontal test frame 1 and the partition 22, a second guide rod 24 and a second screw rod 25 connected end to end are rotatably connected between the front end of the horizontal test frame 1 and the partition 22, a third driving part 27 whose output end is fixedly connected to the second screw rod 25 is arranged at the front end of the horizontal test frame 1, the rear mounting plate 3 is slidably connected to the first guide rod 23 and the second guide rod 24, a second screw nut 26 adapted to the second screw rod 25 is arranged on the front mounting plate 2, and the front mounting plate 2 is slidably connected to the first guide rod 23. When the third driving part 27 is started, it can drive the second screw rod 25 to rotate, and the second screw rod 25 drives the second screw nut 26 to move along the length direction of the second screw rod 25, which can be used to adjust the spacing between the two sets of shock absorber clamps, so as to facilitate fatigue testing of shock absorbers of different lengths.

[0034] Preferably, the vibration damper fixture comprises a “U”-shaped seat 28 , and bolts 29 are threadedly connected to both side walls of the “U”-shaped seat 28 .

[0035] In order to more accurately simulate the operating state of the shock absorber during the operation of the high-speed railway, preferably, the "U"-shaped seat 28 at the rear end is hinged on the rear mounting plate 3, and an extension plate 30 is provided on the "U"-shaped seat 28, and a second connecting rod 34 is hinged on the extension plate 30, and a fourth driving part 31 is provided on the rear mounting plate 3, and a third screw rod 32 is provided at the output end of the fourth driving part 31, and a third screw rod 32 is transmission-connected with a third screw rod nut 33 which is slidingly connected to the rear mounting plate 3, and the third screw rod nut 33 is hinged to the end of the second connecting rod 34. When the fourth driving part 31 is started, the third screw rod 32 can be driven to rotate, and the third screw rod 32 drives the third screw rod nut 33 to move along the length direction of the third screw rod 32, and the third screw rod nut 33 adjusts the angle of the shock absorber clamp at the rear end through the second connecting rod 34 to simulate the actual installation angle of the shock absorber on the high-speed railway, thereby more accurately simulating the operating state of the shock absorber during the operation of the high-speed railway.

[0036] Compared with the prior art, the present invention adopts the coordinated arrangement of a horizontal test frame 1, a front mounting plate 2, a rear mounting plate 3, a shock absorber clamp, a first driving part 4, a turntable 5, a first connecting rod 6, a piston cylinder 7, a water inlet pipe 8, a water outlet pipe 9, a sprayer, a piston 10 and a piston rod 11. When the high-speed rail shock absorber is subjected to a horizontal fatigue test, the two ends of the high-speed rail shock absorber to be tested are respectively fixed on the front mounting plate 2 and the rear mounting plate 3 by means of a clamp, the first driving part 4 drives the turntable 5 to rotate, the turntable 5 drives the rear mounting plate 3 to perform horizontal reciprocating linear motion through the first connecting rod 6, and the horizontal fatigue test is performed on the high-speed rail shock absorber. At the same time, the rear mounting plate 3 drives the piston rod 11 to perform horizontal reciprocating linear motion, the piston rod 11 drives the piston 10 to perform piston motion inside the piston cylinder 7, the cooling water is extracted through the water inlet pipe 8 and transported to the sprayer through the water outlet pipe 9, the cooling water sprayed from the sprayer cools the shock absorber, the accuracy of the test results is improved, and the occurrence of safety accidents is avoided.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed rail shock absorber horizontal fatigue test equipment, comprising a horizontal test frame (1), characterized in that: A front mounting plate (2) and a rear mounting plate (3) are arranged relatively inside the horizontal test frame (1); the rear mounting plate (3) is horizontally slidably connected to the horizontal test frame (1); two groups of shock absorber clamps for fixing the two ends of the shock absorber are arranged relatively on the front mounting plate (2) and the rear mounting plate (3); a first driving part (4) is arranged at the rear end of the horizontal test frame (1); a rotating disk (5) is arranged at the output end of the first driving part (4); and a first connecting rod (6) is eccentrically rotatably connected to the rotating disk (5). The end of the first connecting rod (6) is hinged to the rear mounting plate (3), a piston cylinder (7) is arranged on the inner top wall of the horizontal test frame (1), a water inlet pipe (8) and a water outlet pipe (9) are arranged on the piston cylinder (7), the water outlet pipe (9) is connected to a sprayer for water cooling the shock absorber under test, the interior of the piston cylinder (7) is sealingly and slidably connected to a piston (10), and the piston (10) is provided with a piston rod (11) fixedly connected to the rear mounting plate (3).

2. The high-speed rail shock absorber horizontal fatigue test equipment according to claim 1 is characterized in that: The water inlet pipe (8) and the water outlet pipe (9) are respectively provided with a one-way valve.

3. The high-speed rail shock absorber horizontal fatigue test equipment according to claim 2 is characterized in that: The sprayer comprises an annular spray pipe (12) connected to a water outlet pipe (9), and a nozzle (13) communicating with the inside of the annular spray pipe (12) is arranged on the inner side of the annular spray pipe (12).

4. The high-speed rail shock absorber horizontal fatigue test equipment according to claim 3 is characterized in that: The nozzles (13) are arranged in an inclined and staggered manner.

5. The high-speed rail shock absorber horizontal fatigue test equipment according to claim 4 is characterized in that: The annular spray pipe (12) is provided with a support rod (14) fixedly connected to the rear mounting plate (3).

6. The high-speed rail shock absorber horizontal fatigue test equipment according to claim 5 is characterized in that: A reflux trough (15) is provided at the lower part of the front end of the horizontal test frame (1), the water inlet pipe (8) is connected to the reflux trough (15), and a reflux pump (16) and a chiller (17) are provided on the water inlet pipe (8).

7. The high-speed rail shock absorber horizontal fatigue test equipment according to claim 6 is characterized in that: The rotating disk (5) is radially provided with a rectangular groove (18), the interior of the rectangular groove (18) is rotatably connected with a first screw rod (19), the first screw rod (19) is transmission-connected with a first screw rod nut (20) slidably connected to the rectangular groove (18), the end of the rectangular groove (18) is provided with a second driving part (21) whose output end is fixedly connected to the first screw rod nut (20), the first screw rod nut (20) is provided with a cylindrical pin (35), and one end of the first connecting rod (6) is rotatably connected to the cylindrical pin (35).

8. The high-speed rail shock absorber horizontal fatigue testing equipment according to claim 7 is characterized in that: A partition (22) is vertically arranged inside the horizontal test frame (1), and an avoidance groove (36) is opened on the partition (22). A first guide rod (23) is arranged between the front end of the horizontal test frame (1) and the partition (22). A second guide rod (24) and a second screw rod (25) connected end to end are rotatably connected between the front end of the horizontal test frame (1) and the partition (22). A third driving part (27) whose output end is fixedly connected to the second screw rod (25) is arranged at the front end of the horizontal test frame (1). The rear mounting plate (3) is slidably connected to the first guide rod (23) and the second guide rod (24). A second screw nut (26) adapted to the second screw rod (25) is arranged on the front mounting plate (2), and the front mounting plate (2) is slidably connected to the first guide rod (23).

9. The high-speed rail shock absorber horizontal fatigue testing equipment according to claim 8, characterized in that: The vibration damper fixture comprises a U-shaped seat (28), and bolts (29) are threadedly connected on two side walls of the U-shaped seat (28).

10. The high-speed rail shock absorber horizontal fatigue testing equipment according to claim 9, characterized in that: The "U"-shaped seat (28) at the rear end is hinged on the rear mounting plate (3), the "U"-shaped seat (28) is provided with an extension plate (30), the extension plate (30) is hinged with a second connecting rod (34), the rear mounting plate (3) is provided with a fourth driving part (31), the output end of the fourth driving part (31) is provided with a third screw rod (32), the third screw rod (32) is transmission-connected with a third screw rod nut (33) slidably connected to the rear mounting plate (3), and the third screw rod nut (33) is hinged with the end of the second connecting rod (34).

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