A high performance machine wheel shaft fatigue test device and test method thereof

Abstract

The present invention discloses a high-performance machine wheel axle fatigue testing device and a testing method thereof, comprising a crossbeam, a vertical beam and a bench base, wherein the crossbeam is arranged on the bench base, a side beam is arranged on the front side of the bench base, an actuator cylinder base is arranged on the side beam, an organic wheel axle is installed on the bench base, an organic wheel axle clamp is arranged at the bottom of the machine wheel axle and is installed on the bench base through the machine wheel axle clamp, and the axial direction of the machine wheel axle is consistent with the direction of the bench base, inner support clamps are sleeved on both sides of the machine wheel axle, a dummy wheel clamp is also sleeved on the machine wheel axle, the base of the loading actuator cylinder adopts the form of a universal joint, and the end adopts the form of a fisheye bearing, so as to realize stable loading of the load and ensure that the load direction does not change under the condition of small deformation.

Description

Technical Field

[0001] The invention belongs to the technical field of wheel axle fatigue testing, and in particular relates to a high-performance wheel axle fatigue testing device and a testing method thereof. Background Art

[0002] The landing gear is an important part of the aircraft, used to support the weight of the aircraft during ground travel and take-off and landing. The axle is a key component of the landing gear, carrying the weight of the aircraft and providing a smooth ride and take-off and landing process. During take-off, rolling and landing, the axle transfers the alternating load from the tire to the main structure of the landing gear. Fatigue failure of the axle will lead to serious aircraft accidents.

[0003] Currently, relevant fatigue tests are generally carried out on the overall landing gear. The test content is huge and the test cycle is long, making it difficult to effectively assess the load-bearing capacity of the wheel axle components.

[0004] The present invention specifically introduces a high-performance wheel axle fatigue test device and a test method thereof, which can perform fatigue tests on landing gear wheel axles separately to expose design defects and structural weaknesses of the wheel axles, and provide support for subsequent improvements and structural optimization. Summary of the invention

[0005] The purpose of the present invention is to provide a high-performance machine wheel axle fatigue testing device and a testing method thereof to solve the problem.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-performance machine wheel axle fatigue testing device, comprising a crossbeam, a vertical beam and a bench base, the crossbeam is arranged on the bench base, the front side of the bench base is provided with a side beam, the side beam is provided with an actuator cylinder base, the bench base is provided with an organic wheel axle installed on the bench base, the bottom of the machine wheel axle is provided with an organic wheel axle clamp and is installed on the bench base through the machine wheel axle clamp and the axial direction of the machine wheel axle is consistent with the direction of the bench base, inner support clamps are sleeved on both sides of the machine wheel axle, a dummy wheel clamp is also sleeved on the machine wheel axle, a limiting side plate which can clamp the machine wheel axle and prevent the dummy wheel clamp from rotating along the axis of the machine wheel axle is fixed by bolts on the dummy wheel clamp, and a lateral load interface, a heading load interface and a vertical load interface are provided on the dummy wheel clamp.

[0007] Preferably, inner support blocks are provided on both sides of the wheel axle clamp, and the crossbeam is also provided with an actuating cylinder base on which an actuating cylinder is installed.

[0008] Preferably, both ends of the screw rod are respectively fixedly arranged between the cross beam and the stand base, and one end of the universal joint is fixed on the cross beam and the other end is fixedly connected to the actuator cylinder.

[0009] Preferably, the other end of the actuator is connected to the dummy wheel fixture, and an oblique bracing beam is provided between the platform base and the vertical beam.

[0010] Preferably, a fisheye bearing is provided between the actuator cylinder and the wheel shaft and is fixed by means of a thread and a pin respectively.

[0011] A test method for a high-performance machine wheel shaft fatigue test device, the specific steps are as follows:

[0012] Step 1: Install the test bench according to the wheel axle loading condition, and install the wheel axle on the bench base with bolts through the wheel axle fixture to ensure that the axial direction of the wheel axle is consistent with the direction of the bench base.

[0013] Step 2: Put the inner support clamps on both sides of the machine wheel axle first, then put the dummy wheel clamp on the machine wheel axle, adjust the state of the dummy wheel clamp, and use bolts to fix the limiting side plate on the dummy wheel clamp. The structure on the limiting side plate clamps the machine wheel axle, so that the dummy wheel clamp will not rotate or move along the axis of the machine wheel axle.

[0014] Step 3: Install and fix the actuator cylinders in three directions, namely vertical, heading and lateral, through the base and bolts respectively, and ensure that the axis direction of the actuator cylinder is consistent with the three load directions to be loaded on the wheel axle.

[0015] Step 4: Cyclic loading, including vertical cyclic loading, heading cyclic loading, and lateral cyclic loading, to simulate the actual loading conditions of the axle.

[0016] Step 5: After each cyclic loading test condition is completed, if the test piece does not show cracks or damage, conduct tests under other conditions.

[0017] Step 6: After all cyclic loading conditions are completed, the residual strength test of the specimen is carried out until the specimen is destroyed or the test is completed.

[0018] Technical effects and advantages of the present invention:

[0019] 1. The base of the loading actuator adopts a universal joint, and the end adopts a fisheye bearing, which can realize stable load loading and ensure that the load direction does not change under small deformation conditions;

[0020] 2. Use the test bench connection method shown in the figure to achieve load transfer inside the test bench, without too many additional constraints and without causing a large burden on the test rail;

[0021] 3. The middle part adopts stud support, which can easily adjust the height of the beam and provide support when the load direction changes, thereby improving the bearing capacity and stability of the structure;

[0022] 4. Design the dummy wheel fixture as shown in the figure, which can realize independent loading of loads in three directions. The L-shaped structure shown in the figure can simulate the loading condition of the wheel axle under the real lateral load;

[0023] 5. The limiting side plate can connect the machine wheel shaft and the dummy wheel fixture together through the internal slot structure, which can ensure that the fixture will not rotate around the axis of the machine wheel shaft during load loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 is a side view of the present invention;

[0026] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0027] In the figure: 1. cross beam; 2. screw rod; 3. load sensor; 4. vertical beam; 5. test bench base; 6. actuator cylinder base; 7. side beam; 8. universal joint; 9. actuator cylinder; 10. dummy wheel clamp; 11. wheel axle; 12. diagonal support beam; 13. lateral load interface; 14. heading load interface; 15. limit side plate; 16. fisheye bearing; 17. vertical load interface; 18. inner support clamp; 19. wheel axle clamp. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] The present invention provides a high-performance wheel axle fatigue testing device as shown in the figure, comprising a crossbeam 1, a vertical beam 4 and a bench base 5, the crossbeam 1 is arranged on the bench base 5, a side beam 7 is arranged on the front side of the bench base 5, an actuator cylinder base 6 is arranged on the side beam 7, an organic wheel axle 11 is installed on the bench base 5, an organic wheel axle clamp 19 is arranged at the bottom of the organic wheel axle 11 and is installed on the bench base 5 through the organic wheel axle clamp 19, and the axial direction of the organic wheel axle 11 is consistent with the direction of the bench base 5, inner support clamps 18 are sleeved on both sides of the organic wheel axle 11, a dummy wheel clamp 10 is also sleeved on the organic wheel axle 11, a limiting side plate 15 which can clamp the organic wheel axle 11 and prevent the dummy wheel clamp 10 from rotating along the axis of the organic wheel axle 11 is fixed by bolts on the dummy wheel clamp 10, and a lateral load interface 13, a heading load interface 14 and a vertical load interface 17 are arranged on the dummy wheel clamp 10.

[0030] Specifically, inner support blocks 18 are provided on both sides of the wheel axle clamp 19, and the crossbeam 1 is also provided with an actuating cylinder base 6 on which an actuating cylinder is installed.

[0031] Specifically, both ends of the screw rod 2 are respectively fixedly arranged between the cross beam 1 and the platform base 5 , and one end of the universal joint 8 is fixed on the cross beam 1 and the other end is fixedly connected to the actuator cylinder 9 .

[0032] Specifically, the other end of the actuator 9 is connected to the dummy wheel fixture 10 , and an oblique bracing beam 12 is provided between the platform base 5 and the vertical beam 4 .

[0033] Specifically, a fisheye bearing 16 is provided between the actuator 9 and the wheel shaft 11 and is fixed by means of threads and pins respectively.

[0034] Working principle: Install the test bench according to the loading condition of the machine wheel shaft 11, install the machine wheel shaft 11 on the bench base 5 through the machine wheel shaft fixture 19 with bolts, ensure that the axial direction of the machine wheel shaft 11 is consistent with the direction of the bench base 5, put the inner support clamp on both sides of the machine wheel shaft 11 first, and then put the dummy wheel fixture 10 on the machine wheel shaft 11, adjust the state of the dummy wheel fixture 10, and use bolts to fix the limiting side plate on the dummy wheel fixture 10. The structure on the limiting side plate 15 clamps the machine wheel shaft 11, so that the dummy wheel fixture 10 will not rotate or translate along the axis of the machine wheel shaft 11, and respectively The actuator cylinders 9 in the vertical, heading and lateral directions are fixed through the base and bolts, and the axial direction of the actuator cylinder 9 is ensured to be consistent with the three load directions of the wheel axle 11. The cyclic loading load, including the vertical cyclic loading load, the heading cyclic loading load and the lateral cyclic loading load, simulates the actual loading condition of the wheel axle. After each cyclic loading test condition is completed, if the test piece has no cracks or damage, tests of other conditions are carried out. After all cyclic loading conditions are completed, the residual strength test of the test piece is carried out until the test piece is damaged or the test is completed.

[0035] The base of the loading actuator is implemented as a whole in the form of a universal joint 8, and the end is in the form of a fisheye bearing 16, which can realize stable load loading and ensure that the load direction does not change under small deformation conditions; the test bench connection method shown in the figure is adopted to realize the transfer of load inside the bench, without too many additional constraints and without causing a large burden on the test rail; the middle part is supported by studs, which can facilitate the adjustment of the upper and lower heights of the crossbeam, and provide support when the load direction changes, thereby improving the bearing capacity and stability of the structure; the design of the dummy wheel clamp 10 as shown in the figure can realize independent loading of loads in three directions, and the L-shaped structure shown in the figure can simulate the actual axle loading under the action of lateral loads; the limiting side plate can connect the machine wheel axle 11 and the dummy wheel clamp 10 together through the internal slot structure, which can ensure that the clamp will not rotate around the axis of the machine wheel axle 11 during load loading.

[0036] The universal joint 8 and the fisheye bearing 16 allow rotation in any direction within a certain range. They cooperate with each other to prevent the load from being transmitted in other directions, ensuring that the load direction is always along the linear direction of the actuator cylinder. The beams of the entire gantry are rigidly connected with bolts, so the load is mainly transmitted inside the structure and will not be transmitted to the ground, causing no damage to the ground rails.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test method for a high-performance aircraft wheel axle fatigue test device, the high-performance aircraft wheel axle fatigue test device comprising a crossbeam (1), a vertical beam (4) and a stand base (5), characterized in that: The crossbeam (1) is arranged on a platform base (5), a side beam (7) is arranged on the front side of the platform base (5), an actuator base (6) is arranged on the side beam (7), an organic wheel axle (11) is installed on the platform base (5), an organic wheel axle clamp (19) is arranged at the bottom of the organic wheel axle (11) and is installed on the platform base (5) through the organic wheel axle clamp (19), and the axial direction of the organic wheel axle (11) is consistent with the direction of the platform base (5), the Inner support clamps (18) are sleeved on both sides of the wheel shaft (11), and a dummy wheel fixture (10) is also sleeved on the wheel shaft (11). A limiting side plate (15) is fixed on the dummy wheel fixture (10) by bolts and can clamp the wheel shaft (11) and prevent the dummy wheel fixture (10) from rotating along the axis of the wheel shaft (11). A lateral load interface (13), a heading load interface (14) and a vertical load interface (17) are provided on the dummy wheel fixture (10); The test method of the high-performance machine wheel shaft fatigue test device has the following specific steps: Step 1: Install the test bench according to the loading condition of the wheel shaft (11), and install the wheel shaft (11) on the bench base (5) using bolts through the wheel shaft fixture (19), ensuring that the axial direction of the wheel shaft (11) is consistent with the direction of the bench base (5); Step 2: First, sleeve the inner support clamps on both sides of the machine wheel shaft (11), then sleeve the dummy wheel clamp (10) on the machine wheel shaft (11), adjust the state of the dummy wheel clamp (10), and use bolts to fix the limiting side plate on the dummy wheel clamp (10). The structure on the limiting side plate (15) clamps the machine wheel shaft (11), so that the dummy wheel clamp (10) will not rotate or move along the axis of the machine wheel shaft (11); Step 3: Install and fix the actuators in three directions respectively, and ensure that the axis direction of the actuator cylinder (9) is consistent with the three load directions to be loaded on the wheel shaft (11); Step 4: Cyclic loading, including vertical cyclic loading, heading cyclic loading, and lateral cyclic loading, to simulate the actual loading conditions of the axle; Step 5: After each cyclic loading test condition is completed, if the test piece does not have cracks or damage, conduct tests under other conditions; Step 6: After all cyclic loading conditions are completed, the residual strength test of the specimen is carried out until the specimen is destroyed or the test is completed.

2. The test method of a high-performance wheel axle fatigue test device according to claim 1, characterized in that: Internal support clamps (18) are provided on both sides of the wheel axle clamp (19), and the crossbeam (1) is also provided with an actuating cylinder base (6) on which an actuating cylinder is installed.

3. The test method of a high-performance machine axle fatigue test device according to claim 1, characterized in that: The two ends of the screw rod (2) are respectively fixedly arranged between the cross beam (1) and the platform base (5); one end of the universal joint (8) is fixed on the cross beam (1), and the other end is fixedly connected to one end of the actuator cylinder (9).

4. The test method of a high performance wheel axle fatigue test device according to claim 3, characterized in that: The other end of the actuating cylinder (9) is connected to a dummy wheel fixture (10), and an oblique bracing beam (12) is provided between the platform base (5) and the vertical beam (4).

5. The test method of a high-performance wheel axle fatigue test device according to claim 1, characterized in that: A fisheye bearing (16) is provided between the actuator cylinder (9) and the wheel shaft (11), and is fixed by means of threads and pins respectively.

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