High-speed train axle protection layer shock resistance testing device

Abstract

The utility model belongs to the technical field of mechanical property testing, and particularly relates to a high-speed train axle protective layer shock resistance testing device which comprises a first support 1, a second support 2, a bearing plate 3, a launching mechanism 4, a high-pressure air source tank 6, a photoelectric time measuring device 7 and an impact body 5, and the bearing plate 3 is used for placing a sample to be tested; the launching mechanism 4 is provided with a gas chamber 41 and a launching tube 42, and the gas chamber 41 is provided with a gas inlet valve 43, a gas pressure meter 44 and a pressure release valve 45 and used for controlling gas flow and pressure; the high-pressure gas source tank 6 provides driving force for the launching mechanism; the photoelectric testing device 7 is used for recording impact time; the impact body 5 is movably placed in a launching tube 42 of the launching mechanism 4, and the test device can reproduce impact energy generated when an axle is impacted by objects such as gravel under the working condition of high-speed running of a train, so that it is ensured that axle products passing detection are safe and reliable in actual running of the train, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical performance testing, in particular to a device for testing the impact resistance of a high-speed train axle protection layer. Background Art

[0002] The axle is one of the most important parts of a high-speed train and the center of the wheel rotation. Its status is directly related to the driving safety of the high-speed train. During the operation of a high-speed train, the axle is exposed to the lower part of the train. Even if it is a ballastless track, it will inevitably be hit by objects such as sand, gravel, ice and snow, especially in bad weather and areas with strong winds and sand. Due to the high speed of high-speed trains, the axle is hit by objects such as sand and gravel at a high speed, and the axle is damaged due to the impact, which brings safety hazards to the operation of the train.

[0003] CN107876351A discloses a method for coating the surface of an impact-resistant coating on the axle of a CRH5G EMU. By developing a new axle coating process and spraying a coating of a certain thickness, the problem of existing high-speed rotating axles being seriously hit by sand, gravel, ice and snow can be solved.

[0004] CN109572741A discloses a railway vehicle axle protection device, which provides a protective layer formed by bonding a rubber layer and a non-metallic outer layer to resist and buffer, and attenuate the kinetic energy of the impact of foreign objects, thereby achieving the anti-impact protection function for the axle.

[0005] However, although the above patents provide a new solution to the problem of axle impact, the evaluation and comparison of the actual impact resistance of these protective layers is still a problem to be solved. At present, although the standard BSEN13261 has put forward testing requirements for the impact resistance of coatings on railway vehicle wheels, bogies and axles, it does not provide specific testing methods. This leads to a lack of unified and standardized guidance on how to scientifically and accurately evaluate and compare the impact resistance of different protective layers in actual operation.

[0006] Therefore, a high-speed train axle protective layer impact resistance test device is needed to solve the above problems. Utility Model Content

[0007] In view of the lack of means for testing the impact resistance of the axle protective layer in the prior art, the utility model provides a high-speed train axle protective layer impact resistance test device, which is used to detect the impact of the axle to analyze the impact resistance of the axle protective layer. The combined design of the first bracket, the second bracket, the load-bearing plate, the launching mechanism, the impact body, the high-pressure nitrogen gas source tank and the photoelectric timing device can reproduce the impact energy of the axle encountering sand and gravel and other objects under the condition of high-speed train driving, so as to ensure the safety and reliability of the axle products that have passed the test in the actual operation of the train. At the same time, the use of the high-pressure nitrogen gas source tank as the driving gas source can effectively reduce the test cost.

[0008] The specific technical solutions adopted by the utility model are as follows:

[0009] A high-speed train axle protective layer impact resistance test device, comprising a first bracket 1, a second bracket 2, a bearing plate 3, a launching mechanism 4, a high-pressure gas source tank 6, a photoelectric timing device 7 and an impact body 5, wherein the bearing plate 3 is mounted on the second bracket 2 and is used to place a sample to be tested; the launching mechanism 4 is fixedly mounted on the first bracket 1, and is provided with an air chamber 41 and a launching tube 42, one end of the launching tube 42 is fixedly connected to the air chamber 41, and the air chamber 41 is provided with an air inlet valve 43, a barometer 44 and a pressure relief valve 45 for controlling gas flow and pressure; the high-pressure gas source tank 6 provides driving force for the launching mechanism, and is connected to the launching mechanism air chamber 41 through an air guide tube; the photoelectric testing device 7 is mounted on the first bracket 1, located at one end of the launching mechanism 4, and is used to record the impact time; the impact body 5 is movably placed in the launching tube 42 of the launching mechanism 4; the axis of the launching tube, the axis of the impact body and the center of the photoelectric testing device are on the same horizontal axis.

[0010] The diameter of the impact body matches the inner diameter of the launch tube, and the difference between the inner diameter of the launch tube and the diameter of the impact body does not exceed 0.05 mm.

[0011] The impact body is in the shape of a columnar cone head with a cone head apex angle of 105°. The cone head shape enables the impact body to transmit the impact force to the surface of the axle sample in a more concentrated manner when contacting the axle sample. At the same time, the cone head apex angle design can also reduce the rebound effect of the impact body after the impact, reduce the energy loss and error caused by the rebound, and thus improve the accuracy of the test results.

[0012] Furthermore, the supporting plate is provided with an adjustment mechanism 21 to realize flexible adjustment of the upper, lower, left and right positions of the sample to be tested, so that the operator can easily and quickly adjust the position of the axle sample according to the model or size of the axle sample placed on the supporting plate, thereby greatly improving the flexibility of use of the test device.

[0013] The adjusting mechanism 21 includes a lifting plate 211 and a vertical screw rod 212. The vertical screw rod 212 is fixedly connected to the second bracket 2 by bolts. The lifting plate 211 is fixedly installed on the top of the vertical screw rod 212. The supporting plate 3 is fixedly installed on the lifting plate 211. The operator only needs to rotate the vertical screw rod 212 to drive the lifting plate 211 to rise and fall, so as to easily adjust the height of the axle sample on the supporting plate 3.

[0014] Preferably, in order to ensure the stability of the lifting and lowering of the lifting plate, the adjusting mechanism 21 also includes a guide rod 214, which is located on both sides of the vertical screw rod 212, one end of the guide rod 214 is fixedly connected to the lifting plate 211, and the other end is slidably connected to the second bracket 2; the design of the guide rod 214 can limit the deviation and shaking of the lifting plate, ensure that the lifting plate moves smoothly in the vertical direction, and avoid positioning errors caused by instability.

[0015] Furthermore, in order to adjust the horizontal position of the axle sample, the adjustment mechanism 21 also includes a screw seat 215 and a horizontal screw 216. The screw seat 215 is fixedly mounted on one side of the bearing plate 3 and fixedly mounted on the lifting plate 211. The horizontal screw 216 passes through the screw seat 215 and the bottom of the bearing plate 3 in sequence, and is rotatably connected to the screw seat 215. The horizontal screw 216 is fixedly mounted on the bottom of the bearing plate 3 by bolts. The combined design of the screw seat and the horizontal screw allows the operator to adjust the horizontal position of the axle sample on the bearing plate by simply rotating the horizontal screw to drive the bearing plate to move horizontally. Limiting blocks are provided at the ends of the vertical screw 212 and the horizontal screw 216 to prevent the lifting plate 211 and the bearing plate 3 from moving away from the vertical screw 212 and the horizontal screw 216.

[0016] Preferably, in order to ensure the stability of the horizontal movement of the supporting plate, a guide rail 218 is also provided on the lifting plate 211, and the supporting plate 3 is slidably mounted on the guide rail 218; the design of the guide rail can limit the deviation and shaking of the supporting plate, ensure that the supporting plate moves smoothly in the horizontal direction, and avoid positioning errors caused by instability.

[0017] Preferably, in order to facilitate the operation of the vertical screw rod 212 and the horizontal screw rod 216, a vertical handle 213 and a horizontal handle 217 are fixedly sleeved on the vertical screw rod 212 and the horizontal screw rod 216 respectively; the design of the vertical handle and the horizontal handle enables the operator to directly rotate the vertical screw rod and the horizontal screw rod through the vertical handle and the horizontal handle, thereby realizing the adjustment of the lifting plate and the loading plate.

[0018] Preferably, in order to ensure the accuracy and reliability of the test results, a pressure reducing valve is fixedly installed on the high-pressure nitrogen gas source tank; the design of the pressure reducing valve can convert high-pressure nitrogen into low-pressure nitrogen suitable for testing or equipment use, thereby achieving precise control of the impact body launch speed and force.

[0019] Preferably, in order to facilitate accurate measurement of the impact velocity of the impact body, the photoelectric timing device includes a laser emitting end 71 and a laser receiving end 72. The symmetrical arrangement of the laser emitting end and the laser receiving end can ensure that when the impact body passes through the photoelectric timing device, the time required for the impact body from emission to impacting the target is accurately measured, and then the velocity of the impact body is calculated, so as to establish the relationship between the impact velocity of the impact body and the air pressure, providing a reference for subsequent test results.

[0020] When using, the first step is to select a suitable impact body according to the test requirements and set the impact speed;

[0021] The second step is to assemble the test device, so that the axis of the launch tube, the axis of the impact body, and the center of the photoelectric timing device are on the same horizontal axis, connect the high-pressure nitrogen gas source tank 6 and the launch mechanism 4 through the gas pipe, and check that there is no leakage in the gas path. At the same time, the photoelectric timing device 7 is powered on, and then the impact body 5 is pushed into the launch mechanism 4;

[0022] The third step is to conduct pre-launching. First, open the high-pressure gas source tank 6, open the air inlet valve 43, and observe the barometer 44 to make the air pressure in the launching mechanism 4 reach the set value, then close the air inlet valve 43, open the pressure relief valve 45, and release the pressure in the launching mechanism 4. At this time, the impact body 5 will rush out of the launching mechanism 4 at a certain speed under the push of the compressed gas, record the number and impact speed of the impact body 5, collect the impact body 5 that rushes out, and push it into the launching mechanism 4 again to continue launching, and determine the air pressure value for subsequent tests;

[0023] The fourth step is to place the axle sample on the supporting plate 3 and perform the first impact. Before the impact, the position of the axle sample is adjusted by the adjusting mechanism 21 to ensure that the axis of the transmitting tube, the axis of the impact body, the center of the photoelectric timing device and the impact point of the axle are on the same horizontal axis, and then start the impact test.

[0024] Beneficial effects of the utility model:

[0025] The test device is provided with a first bracket, a second bracket, a bearing plate, a launching mechanism, an impact body, a high-pressure gas source tank and a photoelectric timing device, so as to facilitate the reproduction of the impact energy of the axle being hit by objects such as sand and gravel under the condition of high-speed running of the train, so as to ensure the safety and reliability of the axle products that have passed the test in the actual operation of the train, thereby improving the efficiency of the test;

[0026] The test device can effectively reduce the test cost by using a high-pressure gas source tank as the driving gas source;

[0027] The test device is provided with an adjustment mechanism so that the operator can easily and quickly adjust the position of the axle sample according to the model or size of the axle sample placed on the load-bearing plate, thereby greatly improving the flexibility and convenience of using the test device.

[0028] This testing device fills the gap in the field of testing the impact resistance of high-speed train axle protective layers, and provides a safe and reliable impact testing technology for engineering and technical personnel engaged in the research, development and production of high-speed train axles. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the test device involved in the present invention;

[0030] Figure 2 It is a structural schematic diagram of the adjustment mechanism in the test device involved in the present invention;

[0031] Figure 3 for Figure 2 Left view of

[0032] Figure 4 It is a structural schematic diagram of a launching mechanism in a test device according to the present invention;

[0033] Figure 5 It is a schematic structural diagram of the first bracket in the test device involved in the present invention.

[0034] Among them: 1-first bracket; 2-second bracket; 21-adjusting mechanism; 211-lifting plate; 212-vertical screw; 213-vertical handle; 214-guide rod; 215-screw seat; 216-horizontal screw; 217-horizontal handle; 218-guide rail; 3-carrying plate; 4-launching mechanism; 41-air chamber; 42-launching tube; 43-inlet valve; 44-pressure gauge; 45-pressure relief valve; 5-impact body; 6-high-pressure gas source tank; 7-photoelectric timing device; 71-laser emitting end; 72-laser receiving end. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] A high-speed train axle protective layer impact resistance test device, such as Figure 1-Figure 5As shown, it includes a first bracket 1, a second bracket 2, a bearing plate 3, a launching mechanism 4, a high-pressure nitrogen gas source tank 6, a photoelectric timing device 7 and an impact body 5, wherein the bearing plate 3 is mounted on the second bracket 2 and is used to place the axle sample to be tested; the launching mechanism 4 is fixedly mounted on the first bracket 1, and the launching mechanism 4 is provided with an air chamber 41 and a launching tube 42, one end of the launching tube 42 is fixedly connected to the air chamber 41, and the air chamber 41 is provided with an air inlet valve 43, a barometer 44 and a pressure relief valve 45 for controlling the gas flow and pressure; the high-pressure nitrogen gas source tank 6 is connected to the launching mechanism air chamber 41 through an air guide tube; the photoelectric testing device 7 is mounted on the first bracket 1, located at one end of the launching mechanism 4, and is used to record the impact time; the photoelectric testing device 7 includes a laser emitting end 71 and a laser receiving end 72, and the laser emitting end and the laser receiving end are symmetrically arranged; the impact body 5 is movably placed in the launching tube 42 of the launching mechanism, and the axis of the launching tube, the axis of the impact body and the center of the photoelectric testing device are on the same horizontal axis.

[0038] The impact body 5 used is in the shape of a columnar cone head, the cone head vertex angle is 105°, and the material is medium carbon steel with a Rockwell hardness of HRC30-35.

[0039] An adjusting mechanism 21 is installed on the supporting plate 3, and the adjusting mechanism 21 includes a vertical screw rod 212, a lifting plate 211 and a guide rod 214. The vertical screw rod 212 is fixedly connected to the second bracket 2 by bolts, and the lifting plate 211 is fixedly installed on the top of the vertical screw rod 212. The supporting plate 3 is fixedly installed on the lifting plate 211. The guide rod 214 is located on both sides of the vertical screw rod 212. One end of the guide rod 214 is fixedly connected to the lifting plate 211, and the other end is slidably connected to the second bracket 2. When the axle sample is placed on the supporting plate 3 for an impact test, the vertical screw rod 212 can be rotated. Since the vertical screw rod 212 is screwed to the second bracket 2, when the vertical screw rod 212 is rotated, the vertical screw rod 212 will drive the lifting plate 211 to rise and fall stably under the guidance of the guide rod 214, so that the height of the axle sample placed on the supporting plate 3 can be indirectly adjusted by adjusting the height of the lifting plate 211 to meet different test requirements.

[0040] Furthermore, the adjustment mechanism 21 also includes a screw seat 215 and a horizontal screw 216. The screw seat 215 is fixedly installed on the lifting plate and is located on one side of the supporting plate 3. The horizontal screw rod 216 passes through the screw seat and the bottom of the supporting plate 3 in sequence, and is rotatably connected to the screw seat 215. The horizontal screw rod 216 is fixedly installed on the bottom of the supporting plate 3 by bolts. A guide rail 218 is fixedly installed on the outer side of the lifting plate 211 corresponding to the horizontal screw rod 216, and the bottom of the supporting plate 3 is slidably installed on the guide rail 218.

[0041] In order to facilitate the operation of the vertical screw rod 212 and the horizontal screw rod 216, a vertical handle 213 and a horizontal handle 217 are fixedly sleeved on the vertical screw rod 212 and the horizontal screw rod 216 respectively; the design of the vertical handle 213 and the horizontal handle 217 allows the operator to directly rotate the vertical screw rod 212 and the horizontal screw rod 216 through the vertical handle 213 and the horizontal handle 217, thereby adjusting the lifting plate 211 and the supporting plate 3; when it is necessary to replace different impact bodies 5 for multiple impact tests, and the distance between adjacent impact points should be no less than 20mm, the horizontal screw rod 216 can be rotated. At this time, since the horizontal screw rod 216 is screwed to the supporting plate 3, when the horizontal screw rod 216 is rotated, the supporting plate 3 can be stably moved horizontally under the guidance of the guide rail 218, so that the horizontal position of the supporting plate 3 can be indirectly achieved by adjusting the horizontal position of the supporting plate 3 to meet the test requirements.

[0042] It should be supplemented that limit blocks are provided at the ends of the vertical screw rod 212 and the horizontal screw rod 216 to prevent the lifting plate 211 and the supporting plate 3 from moving away from the vertical screw rod 212 and the horizontal screw rod 216 .

[0043] In addition, in order to ensure the accuracy and reliability of the test results, a pressure reducing valve is fixedly installed on the high-pressure nitrogen gas source tank 6; the design of the pressure reducing valve can convert high-pressure nitrogen into low-pressure nitrogen suitable for testing or equipment use, thereby achieving precise control of the launch speed and force of the impact body 5.

[0044] The photoelectric timing device 7 includes a laser emitting end 71 and a laser receiving end 72. When the impact body 5 rushes out of the transmitting tube 42, the laser beam between the laser emitting end 71 and the laser receiving end 72 will be accurately blocked, thereby triggering the timing system to start and end timing. After that, the impact speed can be calculated by calculating the ratio of the length of the impact body 5 to the light blocking time.

[0045] When using this device, the specific operating steps are as follows:

[0046] When in use, the first step is to pre-treat the axle sample at low temperature, and then immediately conduct an impact test after the low temperature pre-treatment is completed. In this embodiment, the impact energy is 12J, the impact body 5 has a weight of 60g, a diameter of 37mm, a length of 11.6mm, and a cone head angle of 105°, and the emission driving air pressure controls the impact speed to 19.7-20.3m / s;

[0047] Step 2: Connect the high-pressure nitrogen gas source tank 6 and the launching mechanism 4 through the gas pipe, and check that there is no leakage in the gas circuit. At the same time, connect the photoelectric timing device 7 to the power supply, and then push the 60g impact body 5 into the launching mechanism 4;

[0048] The third step is to conduct pre-launching. First, open the high-pressure nitrogen gas source tank 6 so that the air pressure in the launching mechanism 4 reaches the set value. When the air pressure reaches the set value, stop the input of the high-pressure nitrogen gas source tank 6 to the gas in the launching mechanism 4, and depressurize the launching mechanism 4. At this time, the impact body 5 will rush out of the launching mechanism 4 at a certain speed under the push of the compressed gas. During the rushing process of the impact body 5, record the number and impact speed of the impact body 5, then collect the rushed impact body 5, push it into the launching mechanism 4 again to continue launching, and then control the air pressure in the launching mechanism 4 to gradually increase the air pressure. At this time, record the speed of the impact body 5. After recording the speed, the pressure value of the subsequent test can be determined by linear fitting of the pressure-speed relationship v=6p+15;

[0049] Step 4: Place the axle sample on the bearing plate 3 and perform the first impact. Before the test, adjust the position of the axle sample through the adjustment mechanism 21. Then, input gas into the launch mechanism 4 through the high-pressure nitrogen gas source tank 6. When the gas pressure in the launch mechanism 4 reaches the set value of 0.5Mpa, stop supplying gas, and then release the pressure of the launch mechanism 4. At this time, the impact body 5 will rush out of the launch mechanism 4 at a certain speed under the push of the compressed gas to impact the axle sample. During the impact process, record the number and impact speed of the impact body 5.

[0050] Step 5: Replace different impact bodies 5 and perform multiple impacts. Also before the test, the impact position of the axle sample can be adjusted by the adjustment mechanism 21 so that the distance between adjacent impact points should be no less than 20 mm. During the impact test, keep recording the impact body 5 number and impact speed. After twelve impact tests, the high-pressure nitrogen gas source tank 6 is closed after the experiment is finished.

[0051] Step 6. Visually observe the state of the protective layer of the axle sample after the impact test, and record whether the protective layer is broken or not; if the protective layer is broken or fallen off, cut the protective layer with the impact point as the center and a radius of 10mm, and then observe the state of the axle sample and record whether there is an impact indentation on the surface of the axle sample; if there is an impact indentation, measure and record the depth of the indentation;

[0052] Step 7. Rating the impact resistance of the axle protective layer according to the protective layer damage classification. If there are slight damage pits on the front of the protective layer but no cracks, it is grade one; if there are pits of any shape on the front of the protective layer and there are cracks but no falling off, it is grade two; if there are pits of any shape on the front of the protective layer and there are cracks and falling off, it is grade three; if the protective layer is broken and falls off, and there are impact indentations on the surface of the axle with a depth of no more than 0.5mm, it is grade four; if the protective layer is broken and falls off, and there are impact indentations on the surface of the axle with a depth of more than 0.5mm, it is grade five.

Claims

1. A high-speed train axle protective layer impact resistance test device, characterized in that: The device comprises a first bracket (1), a second bracket (2), a bearing plate (3), a launching mechanism (4), an impact body (5), a high-pressure gas source tank (6), and a photoelectric testing device (7); the bearing plate (3) is mounted on the second bracket (2) and is used to place a sample to be tested; the launching mechanism (4) is fixedly mounted on the first bracket (1), the launching mechanism (4) is provided with an air chamber (41) and a launching tube (42), one end of the launching tube (42) is fixedly connected to the air chamber (41), and the air chamber (41) is provided with an air inlet valve (43), a barometer (44) and a pressure relief valve (45) for controlling gas flow and pressure; the high-pressure gas source tank (6) provides driving force for the launching mechanism and is connected to the launching mechanism air chamber through an air guide tube; the photoelectric testing device (7) is installed on the first bracket (1) and is located at one end of the launching mechanism (4) for recording the impact time; the impact body (5) is movably placed in the launching tube (42) of the launching mechanism (4); the axis of the launching tube, the axis of the impact body and the center of the photoelectric testing device are on the same horizontal axis.

2. The high-speed train axle protective layer impact resistance test device according to claim 1 is characterized by: The impact body is in the shape of a columnar cone head with a cone head vertex angle of 105°. The diameter of the impact body matches the inner diameter of the launch tube, and the difference between the inner diameter of the launch tube and the diameter of the impact body is ≤0.05mm.

3. The high-speed train axle protective layer impact resistance test device according to claim 1 or 2, characterized in that: The bearing plate (3) is provided with an adjustment mechanism (21), the adjustment mechanism (21) comprising a lifting plate (211) and a vertical screw rod (212), the vertical screw rod (212) being fixedly connected to the second bracket (2) by means of bolts, the lifting plate (211) being fixedly mounted on the top of the vertical screw rod (212), and the bearing plate (3) being fixedly mounted on the lifting plate (211).

4. The high-speed train axle protective layer impact resistance test device according to claim 3 is characterized by: The adjustment mechanism (21) further comprises a guide rod (214), the guide rod (214) being located on both sides of the vertical screw rod (212), one end of the guide rod (214) being fixedly connected to the lifting plate (211), and the other end of the guide rod (214) being slidably connected to the second bracket (2).

5. The high-speed train axle protective layer impact resistance test device according to claim 3 is characterized by: The adjusting mechanism (21) further comprises a screw seat (215) and a horizontal screw (216); the screw seat (215) is fixedly mounted on the lifting plate (211) and is located on one side of the bearing plate (3); the horizontal screw (216) passes through the screw seat (215) and the bottom of the bearing plate (3) in sequence and is rotatably connected to the screw seat (215); the horizontal screw (216) is fixedly mounted on the bottom of the bearing plate (3) by bolts.

6. The high-speed train axle protective layer impact resistance test device according to claim 4 is characterized by: The adjusting mechanism (21) further comprises a screw seat (215) and a horizontal screw (216); the screw seat (215) is fixedly mounted on the lifting plate (211) and is located on one side of the bearing plate (3); the horizontal screw (216) passes through the screw seat (215) and the bottom of the bearing plate (3) in sequence and is rotatably connected to the screw seat (215); the horizontal screw (216) is fixedly mounted on the bottom of the bearing plate (3) by bolts; and limit blocks are provided at the ends of the vertical screw (212) and the horizontal screw (216).

7. The high-speed train axle protective layer impact resistance test device according to claim 5 or 6, characterized in that: The lifting plate (211) is provided with a guide rail (218), and the carrying plate (3) is slidably mounted on the guide rail (218).

8. The high-speed train axle protective layer impact resistance test device according to claim 5 or 6, characterized in that: A vertical handle (213) and a horizontal handle (217) are fixedly sleeved on the vertical lead screw (212) and the horizontal lead screw (216) respectively.

9. The high-speed train axle protective layer impact resistance test device according to claim 7, characterized in that: A vertical handle (213) and a horizontal handle (217) are fixedly sleeved on the vertical lead screw (212) and the horizontal lead screw (216) respectively.

10. The high-speed train axle protective layer impact resistance test device according to claim 1, characterized in that: A pressure reducing valve is fixedly mounted on the high-pressure gas source tank (6).

Images