Performance test equipment for aircraft landing knuckle bearing

Abstract

The utility model relates to the field of bearing tests, and particularly discloses performance test equipment for an aircraft landing knuckle bearing. The airplane takeoff and landing knuckle bearing performance test equipment comprises a test bench, a mounting module, a driving module, a loading module and a detection module, the mounting module comprises a test shaft and two groups of mounting seats, and the test shaft is arranged between the two groups of mounting seats; the test shaft comprises test sections, and a grease injection channel is arranged in the test shaft; the driving module comprises a rotary driving piece, and the rotary driving piece is connected with the driving end of the test shaft; the loading module comprises a loading power piece and a loading head, and the loading head is connected with the loading power piece; the detection module comprises a torque detection unit. The airplane takeoff and landing knuckle bearing performance test equipment can perform friction torque test on the knuckle bearing, can realize grease injection operation of the knuckle bearing, and has the advantages of high automation degree and reliable working condition simulation.

Description

Technical Field

[0001] The utility model relates to the field of bearing testing, in particular to a performance testing device for aircraft landing joint bearings. Background Art

[0002] Spherical plain bearings are a type of bearing widely used in engineering machinery, automation equipment, aircraft landing gear and other industries. Spherical plain bearings are spherical sliding bearings. The basic type consists of an inner ring and an outer ring with a spherical sliding spherical contact surface, and no rolling elements are provided. They can withstand radial loads, axial loads, or combined loads of radial and axial forces acting simultaneously. They can rotate and swing at any angle during movement. They have the characteristics of large load capacity, impact resistance, corrosion resistance, wear resistance, self-alignment, and good lubrication.

[0003] like Figure 1 and Figure 2 The figure shows the structure of a spherical joint bearing. Spherical joint bearings are generally used for low-speed swinging motion (i.e. angular motion). Since the sliding surface is spherical, they can also perform tilting motion (i.e. self-aligning motion) within a certain angle range. They can still work normally when the supporting shaft and the shaft housing hole have a large degree of non-concentricity.

[0004] Among various bearing parameters, friction torque is a very important parameter for sliding bearings. Depending on the load status of the spherical plain bearing, friction torque can be divided into no-load starting torque and loaded starting torque. No-load starting torque is the torque required to start the rotation of one bearing ring relative to another fixed ring. Loaded starting torque is the torque required to prevent the movement of one bearing ring while the other ring rotates. Friction torque is an important indicator for evaluating the quality of metal-on-metal spherical plain bearings. It directly affects the rotational accuracy of the bearing and indirectly indicates whether the contact between the inner and outer rings is in good contact. Lubrication conditions are one of the key factors affecting friction torque and directly affect the service life of the bearing.

[0005] Because spherical plain bearings lack rolling elements, their friction torque is far greater than that of rolling bearings of the same specification. Therefore, the parameter design of the friction torque of spherical plain bearings and the research on their lubrication reliability are even more critical. Spherical plain bearings are typically lubricated with grease, and internal grease grooves are used for lubrication. However, due to the limited storage capacity of internal grease and the difficulty of sealing the grease in spherical plain bearings, the reliable lubrication time of a single grease injection is limited. Therefore, in applications where reliability is a concern, grease injection holes are often provided in the inner ring to facilitate timely grease injection after a period of use, thereby ensuring that the spherical plain bearing is in a well-lubricated state during use.

[0006] However, the number and timing of greasing operations need to be tested and measured. If the number of greasing operations is too small, it is difficult to ensure that the bearing is in a good lubrication state. If the number of greasing operations is too large, a lot of grease will be wasted, increasing labor costs and economic costs.

[0007] Currently, friction torque testing for rolling bearings is well established, but testing methods for sliding bearings are relatively lacking. Furthermore, there are no reports on the relationship between friction torque and grease refilling times for sliding bearings. Therefore, the purpose of this application is to design a test device and lubrication reliability test method tailored to the unique structure of spherical plain bearings. This test measures the friction torque and lubrication refilling conditions of spherical plain bearings, providing a test basis for improving their performance and service life. Summary of the Invention

[0008] The technical problem to be solved by the utility model is to provide an aircraft take-off and landing joint bearing performance test device, which can perform friction torque tests on the joint bearings and realize grease injection operations on the joint bearings, and has the advantages of high degree of automation and reliable working condition simulation.

[0009] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: an aircraft landing joint bearing performance test device at least comprises:

[0010] test bench;

[0011] The mounting module includes a test shaft and two sets of mounting seats, the mounting seats are arranged on the test bench, and a test interval is formed between the two sets of mounting seats; the test shaft is arranged between the two sets of mounting seats and is rotatably connected to the two sets of mounting seats;

[0012] The test shaft includes a test segment, and the test segment is aligned with the test interval; one end of the test shaft is a grease injection end, and the other end is a drive end; a grease injection channel is provided in the test shaft, the inlet of the grease injection channel is located at the grease injection end, and the outlet is located on the side of the test segment;

[0013] A driving module, wherein the driving module includes a rotary driving member, and the rotary driving member is disposed on the test bench and connected to the driving end of the test shaft;

[0014] The loading module includes a loading power member and a loading head. The loading power member is arranged on the test bench and is located on one side of the test interval. The loading head is connected to the loading power member and is arranged toward the test interval.

[0015] The detection module includes a torque detection unit and a temperature detection unit. The torque detection unit is located between the rotating drive member and the test shaft. The temperature detection unit is set on the test bench. The detection end of the temperature detection unit passes through the loading head and corresponds to the outer ring of the test bearing.

[0016] During the test, the test bearing is mounted on the test section of the test shaft. A loading head is connected to the outer ring of the test bearing. The loading element applies a radial load to the test bearing through the loading head. The rotary drive element drives the test shaft and the inner ring of the test bearing to rotate synchronously. The torque transmitted to the test shaft is measured in real time by the torque detection unit, thereby obtaining the performance parameters of the spherical plain bearing. A temperature sensor is used to monitor the bearing temperature in real time. The test is terminated when the bearing temperature reaches a preset value.

[0017] Due to the high load of the spherical plain bearing, two sets of mounting blocks simultaneously support the test shaft to better maintain the stability of the test shaft. The grease injection channel can be used to inject grease into the spherical plain bearing during the test, which is used to improve the lubrication conditions of the spherical plain bearing and explore the lubrication reliability of the experimental bearing.

[0018] Preferably, the test shafts are connected to the mounting seats respectively through accompanying test bearings.

[0019] Preferably, the companion test bearing is a rolling bearing.

[0020] The friction torque of the rolling bearing is much smaller than that of the spherical plain bearing. Therefore, the rolling bearing is selected as the test bearing. During the test, the influence of the friction torque of the test bearing on the detection result of the torque detection unit is within the error range and can be ignored.

[0021] Preferably, the test shaft comprises a support segment, the support segment is provided with an inner ring locking unit, and the test segment is provided with an inner ring sleeve.

[0022] During the test, the inner ring is placed in the test section, and both ends of the inner ring are respectively abutted against the inner ring locking unit through the inner ring sleeve, and are axially compressed and limited by the inner ring locking unit.

[0023] Preferably, it further comprises a pulling plate, which is arranged between the loading power member and the mounting seat and fixedly connected to the loading power member and the mounting seat respectively; the loading head is located between the test bench and the pulling plate.

[0024] The pull plate and the mounting seat bear the load on the upper and lower sides of the test shaft respectively to avoid unbalanced loading of the loading power parts.

[0025] Preferably, the driving module further comprises a counter for detecting the number of swings of the rotating driving member.

[0026] Since the landing gear spherical bearing works intermittently in actual use conditions, by setting a counter, the number of swings can be used instead of the running time to evaluate the life.

[0027] Preferably, the displacement detection unit is arranged on the test bench, and the detection end of the displacement detection unit passes through the loading head and contacts the outer ring of the test bearing.

[0028] The temperature sensor is used to detect the radial displacement of the bearing in real time. When the radial displacement of the bearing reaches a preset value, the test is stopped and the test bearing is determined to be worn and failed.

[0029] Preferably, the loading head comprises a loading ring, and the loading ring is sleeved outside the test section of the test shaft.

[0030] The loading ring can limit the outer ring of the experimental bearing to ensure reliable relative movement between the inner ring and outer ring of the spherical plain bearing.

[0031] Preferably, the loading head further comprises a transition rod, one end of which is connected to the loading power member, and the other end of which is detachably connected to the loading ring.

[0032] The loading head can be replaced according to the specific model of the spherical plain bearing to improve the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural diagram of an aircraft landing joint bearing;

[0034] Figure 2 This is a cross-sectional view of an aircraft landing joint bearing;

[0035] Figure 3 This is a schematic diagram of the aircraft landing joint bearing performance test equipment of this embodiment;

[0036] Figure 4 This is a top view of the aircraft landing joint bearing performance test equipment according to this embodiment;

[0037] Figure 5 This is a side full-section view of the aircraft landing joint bearing performance test equipment of this embodiment;

[0038] Figure 6 This is a schematic structural diagram of the installation of the aircraft landing joint bearing performance test equipment in this embodiment;

[0039] Figure 7 This is a full cross-sectional view of the installation components in the aircraft landing joint bearing performance test equipment of this embodiment;

[0040] Figure 8 This is a schematic diagram of the installation of the test bearing in the aircraft landing joint bearing performance test equipment of this embodiment;

[0041] Figure 9 Flowchart of the aircraft landing joint bearing lubrication reliability test method according to this embodiment. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] Example

[0044] like Figure 3 and Figure 4 As shown, the aircraft landing joint bearing performance test equipment includes a test bench 1, a mounting module 3, a driving module 2, a loading module 4 and a detection module.

[0045] like Figure 4-Figure 8 As shown, the mounting module 3 includes a test shaft 31 and two sets of mounting seats 32. The mounting seats 32 are arranged on the test bench 1, and a test area 33 is formed between the two sets of mounting seats 32. The test shaft 31 is arranged between the two sets of mounting seats 32 and is rotatably connected to the two sets of mounting seats 32.

[0046] Since the working load of the spherical bearing is relatively large, the two sets of mounting seats 32 support the test shaft 31 at the same time, which can better maintain the stability of the test shaft 31.

[0047] like Figure 4-Figure 8 As shown, the test shaft 31 comprises a test section and a support section. The test section is aligned with the test area 33, and the support section corresponds one-to-one with the mounting seat 32. One end of the test shaft 31 is a grease injection end, and the other end is a drive end. A grease injection channel 311 is provided within the test shaft 31. The inlet of the grease injection channel 311 is located at the grease injection end, and the outlet is located on the side of the test section.

[0048] The grease injection channel 311 can be used to inject grease into the spherical plain bearing during the test, so as to improve the lubrication condition of the spherical plain bearing and explore the lubrication reliability of the experimental bearing.

[0049] like Figure 4-Figure 8 Specifically, the support segment is provided with an inner ring locking unit 35, and the test segment is provided with an inner ring sleeve. During testing, the inner ring sleeve is placed in the test segment, and the inner ring's ends abut against the inner ring locking unit 35 through the inner ring sleeves, and are axially compressed and limited by the inner ring locking unit 35.

[0050] like Figure 4-Figure 8As shown, the test shaft 31 is connected to the mounting seat 32 through the accompanying test bearing 34 , and the accompanying test bearing 34 is arranged between the corresponding inner ring locking unit 35 and the mounting seat 32 .

[0051] like Figure 4-Figure 8 As shown, specifically, the test bearing 34 is a rolling bearing. The friction torque of a rolling bearing is much smaller than that of a spherical plain bearing. Therefore, a rolling bearing is selected as the test bearing 34. During the test, the effect of the friction torque of the test bearing 34 on the detection results of the torque detection unit 51 is within the error range and can be ignored.

[0052] like Figure 4-Figure 8 As shown, the drive module 2 includes a rotary drive member 21, which is disposed on the test bench 1 and connected to the drive end of the test shaft 31. Specifically, the rotary drive member 21 is a hydraulic cylinder. The drive module 2 also includes a counter for detecting the number of swings of the rotary drive member 21.

[0053] like Figure 4-Figure 8 As shown, the loading module 4 includes a loading power member 41 and a loading head 42 . The loading power member 41 is arranged on the test bench 1 and is located on one side of the test section 33 . The loading head 42 is connected to the loading power member 41 and is arranged toward the test section 33 .

[0054] like Figure 4-Figure 8 As shown, specifically, the loading head 42 includes a loading ring 422, which is sleeved outside the test segment of the test shaft 31. The loading ring 422 can limit the outer ring of the test bearing to ensure reliable relative movement between the inner and outer rings of the spherical plain bearing.

[0055] like Figure 4-Figure 8 As shown, the loading head 42 further includes a transition rod 421, one end of which is connected to the loading power member 41, and the other end is detachably connected to the loading ring 422. The loading head 42 can be replaced according to the specific model of the spherical bearing to improve the scope of application.

[0056] like Figure 5 As shown, the test bench 1 further includes a pull plate 43, which is disposed between the loading member 41 and the mounting seat 32 and is fixedly connected to each of the loading member 41 and the mounting seat 32. The loading head 42 is located between the test bench 1 and the pull plate 43. The pull plate 43 and the mounting seat 32 bear on the upper and lower sides of the test shaft 31, respectively, to prevent unbalanced loading of the loading member 41.

[0057] like Figure 4-Figure 5As shown, the detection module includes a torque detection unit 51, a displacement detection unit 53 and a temperature detection unit 52. The torque detection unit 51 is located between the rotary drive member 21 and the test shaft 31 and is used to detect the torque transmitted to the test shaft 31 in real time.

[0058] like Figure 4-Figure 5 As shown, the displacement detection unit 53 is set on the test bench 1. The detection end of the displacement detection unit 53 passes through the loading ring 422 and contacts the outer ring of the test bearing 6. The displacement detection unit 53 is used to detect the displacement of the outer ring of the test bearing 6 in real time.

[0059] like Figure 4-Figure 5 As shown, the temperature detection unit 52 is set on the test bench 1, and the detection end of the temperature detection unit 52 passes through the loading ring 422 and corresponds to the outer ring of the test bearing 6, which is used to detect the temperature of the test bearing 6 in real time.

[0060] During the test, the test bearing 6 is mounted on the test section of the test shaft 31. The loading head 42 is connected to the outer ring of the test bearing 6. The loading power member 41 applies a radial load to the test bearing 6 via the loading head 42. The rotary drive member 21 drives the test shaft 31 and the inner ring of the test bearing 6 to rotate synchronously. The torque detection unit 51 detects the torque transmitted to the test shaft 31 in real time, thereby obtaining the performance parameters of the spherical plain bearing.

[0061] like Figure 9 As shown, the aircraft landing joint bearing lubrication reliability test method uses the aircraft landing joint bearing performance test equipment described above. It includes the following steps:

[0062] S1. Parameter setting: Set the design load F of the test bearing 6 n , oscillation frequency f, oscillation angle α and design life H.

[0063] S01. Selection of test bearing 34: According to the rolling bearing life calculation formula

[0064]

[0065] Obtain the dynamic load rating required for the test bearing 34 and select the model of the test bearing 34.

[0066] Where: L h For the test bearing 34 life, L h Not less than the design life H of the test bearing 6;

[0067] C r is the rated dynamic load of the test bearing 34;

[0068] F r is the maximum working load, F rNot less than F n ;

[0069] n is the maximum operating speed.

[0070] The selection of the test bearing 34 needs to fully consider the working load, and the working life should not be less than the design life of the test bearing 6 to ensure that the test bearing 34 can reliably and stably support the test shaft 31 under the test conditions.

[0071] S2. Installation: Slide the inner ring of the test bearing 6 onto the test segment of the test shaft 31 and axially limit it. Align and connect the grease injection hole of the inner ring of the test bearing 6 with the outlet of the grease injection channel 311. Connect the loading head 42 to the outer ring of the test bearing 6.

[0072] S02. Running-in: Set the running-in load F0 and running-in time H0, where F0 = (0.2~0.3)F n , H0=2~4h.

[0073] The loading module 4 applies a radial load F0 to the outer ring of the test shaft 31 , and the driving module 2 drives the test shaft 31 to swing back and forth at a frequency f and an angle α, with a running time of H0 .

[0074] A running-in temperature rise threshold value T1 is set. If the temperature rise of the test bearing 6 reaches the running-in temperature rise threshold value, the test is stopped and it is determined that the test bearing 6 is unqualified in processing.

[0075] The finished test bearing 6 will experience a period of unstable performance during initial operation. To ensure the reliability of the test results, a run-in procedure with reduced load can be performed before the formal test. During the run-in process, the temperature change serves as a basis for judging the effectiveness of the run-in. If the temperature rises excessively, the run-in has failed, the product's processing quality is substandard, and it should be deemed scrapped, and the test terminated.

[0076] S03. Testing the bottom: Set the testing time H1, H1 = 3 to 5H0, and the loading module 4 applies a radial load F to the outer ring of the test shaft 31. n The driving module 2 drives the test shaft 31 to swing back and forth at a frequency f and an angle α, and the running time is H1.

[0077] A bottom-test temperature rise threshold value T2 is set. If the temperature rise of the test bearing 6 during the bottom-test operation reaches the bottom-test temperature rise threshold value, the test is stopped and the design of the test bearing 6 is judged to be unqualified.

[0078] The purpose of the baseline testing step is to determine whether the test bearing 6 can stably operate under the design load, using the temperature change of the test bearing 6 as the basis for this determination. If the temperature of the test bearing 6 rises above the baseline temperature rise threshold during the baseline testing phase, it is determined that the test bearing 6 can no longer operate under the design load, indicating that the product design has failed, and the test is terminated. The baseline testing step effectively screens out unqualified products and improves experimental efficiency.

[0079] S3. Operation: Loading module 4 applies radial load F to the outer ring of test shaft 31 n The driving module 2 drives the test shaft 31 to swing back and forth at a frequency f and an angle α, and records the running time t in real time; the torque detection unit 51 works to detect the torque transmitted between the rotating drive member 21 and the test shaft 31, and the real-time torque value is recorded as M.

[0080] The first torque value detected by the torque detection unit 51 after the operation starts is set as the initial torque M0, and the torque threshold is set as M1, where M1 = (2 to 2.5) M0.

[0081] If the operating time t reaches the design life H, step S5 is directly executed.

[0082] If the real-time torque M reaches the torque threshold M1 and the operating time t does not reach the design life H, the operation is suspended and step S4 is executed.

[0083] S4. Grease injection: inject grease into the test bearing 6 through the grease injection channel 311 and continue to step S3.

[0084] S5. Result post-processing: Stop the operation and obtain the friction performance and lubrication reliability parameters of the test bearing 6 based on the real-time detected torque value and grease injection time point.

[0085] The aircraft landing gear spherical bearing lubrication reliability test method described in this application can reliably simulate the operating conditions of aircraft landing gear spherical bearings and obtain the changes in friction torque. It can also explore the interaction between grease filling and friction torque changes, providing a test basis for improving the performance and service life of spherical bearings.

[0086] This application uses a dynamic torque threshold setting method, eliminating the need to manually set the threshold based on the bearing model, making the test more flexible. It also provides a more reasonable setting for the torque threshold after re-greasing, allowing for more reliable and accurate data on the lubrication performance of spherical plain bearings.

[0087] Furthermore, the displacement of the outer ring of the test bearing 6 is recorded as L, and the displacement threshold is set to S, S = 0.004d, where d is the inner diameter of the test bearing 6; during the test, when L ≥ S, the test is stopped and the test bearing 6 is determined to be worn and failed.

[0088] The following describes in detail the aircraft landing gear joint bearing lubrication reliability test method of the present application using a set of test parameters for a specific model of landing gear joint bearing.

[0089] S1. Parameter setting: According to the design parameters of the landing gear joint bearing, set the design load F of the test bearing 6 n = ±420kN, swing frequency f = 0.2Hz, swing angle α = ±10°, design life H = 90h.

[0090] Considering that landing gear spherical bearings operate intermittently in actual use, it is more reasonable to evaluate the design life by the number of swings. Therefore, based on the design life and swing frequency, the design number of swings is 64,800. A margin is added to this value, setting the design number of swings R to 65,000.

[0091] S01. Selection of 34 test bearings: To simplify the process, we preselected the 34 test bearing model and calculated its service life. We selected two sets of spherical roller bearings, model 23134, with a dynamic load rating of Cr = 1086 kN. The equipment's maximum load capacity is 500 kN, and the speed is 200 r / min.

[0092] According to the above calculation formula, the service life is 1102 h, which is much longer than the design life of the test bearing 6 and can meet the test requirements.

[0093] S2. Installation: Slide the inner ring of the test bearing 6 onto the test segment of the test shaft 31 and axially limit it. Align and connect the grease injection hole of the inner ring of the test bearing 6 with the outlet of the grease injection channel 311. Connect the loading head 42 to the outer ring of the test bearing 6.

[0094] S02. Running-in: Set the running-in load F0 to 100 kN and the running-in time H0 to 3 hours, corresponding to the number of swings R0 to 2160. Loading module 4 applies a radial load F0 to the outer ring of test shaft 31. Drive module 2 drives test shaft 31 to swing back and forth at frequency f and angle α, for a number of swings R0.

[0095] The running-in temperature rise threshold value T1 is set to 5°C. During the running-in process, the maximum temperature rise detected in real time is 2°C, which is less than the running-in temperature rise threshold value. The running-in is successful and the test bearing 6 is qualified.

[0096] S03. Testing the bottom: Set the testing time H1 = 9h, the corresponding swing number R1 = 6480 times, and the loading module 4 applies a radial load F to the outer ring of the test shaft 31. n The driving module 2 drives the test shaft 31 to swing back and forth at a frequency f and an angle α, with a swing frequency of R1.

[0097] The bottom-test temperature rise threshold value T2 is set to 30°C. During the bottom-test process, the maximum temperature rise value detected in real time is 20°C, which is less than the bottom-test temperature rise threshold value. The bottom-test is successful and the test bearing 6 is qualified.

[0098] S3. Operation: Loading module 4 applies radial load F to the outer ring of test shaft 31 n The driving module 2 drives the test shaft 31 to swing back and forth at a frequency f and an angle α, and records the running time t in real time (in this test, the running time is indirectly recorded by recording the number of swings); the torque detection unit 51 works to detect the torque transmitted between the rotating drive member 21 and the test shaft 31, and the real-time torque value is recorded as M.

[0099] The first torque value detected by the torque detection unit 51 after the operation starts is set as the initial torque M0, and the torque threshold is set as M1, where M1 = (2 to 2.5) M0.

[0100] It should be noted that after grease injection, when running again, the first torque value detected by the torque detection unit 51 will overwrite the initial torque M0 during the first operation, that is, the initial torque and the torque threshold are dynamic values ​​and will change according to the progress of the grease injection operation.

[0101] If the operating time t reaches the design life H, step S5 is directly executed.

[0102] If the real-time torque M reaches the torque threshold M1 and the operating time t does not reach the design life H, the operation is suspended and step S4 is executed.

[0103] S4. Grease injection: inject grease into the test bearing 6 through the grease injection channel 311 and continue to step S3.

[0104] S5. Result post-processing: Stop the operation and obtain the friction performance and lubrication reliability parameters of the test bearing 6 based on the real-time detected torque value and grease injection time point.

[0105] The operation results are shown in the following table:

[0106] Table 1 Operating parameters

[0107]

[0108] Taking the test results in Table 1 to obtain the average value of the swing number and the swing torque corresponding to the grease injection, the relationship between the bearing grease injection number and the friction torque can be obtained as follows:

[0109] The first greasing operation, performed after about 3,000 swings, corresponds to a torque of approximately -1,600 N·m. The second greasing operation, performed after about 33,000 swings, corresponds to a torque of approximately -3,236 N·m. During the use of the bearing, greasing in two stages, at 3,000 and 33,000 swings, can meet the requirements.

[0110] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Aircraft landing joint bearing performance test equipment, characterized in that: At least: Test bench; The mounting module comprises a test shaft and two sets of mounting seats, the mounting seats are arranged on the test bench, and a test interval is formed between the two sets of mounting seats; the test shaft is arranged between the two sets of mounting seats, and is rotatably connected to the two sets of mounting seats respectively; The test shaft comprises a test segment, and the test segment is aligned with the test interval; one end of the test shaft is a grease injection end, and the other end is a drive end; a grease injection channel is provided in the test shaft, and the inlet of the grease injection channel is located at the grease injection end, and the outlet is located at the side of the test segment; A driving module, wherein the driving module comprises a rotating driving member, and the rotating driving member is arranged on the test bench and connected to the driving end of the test shaft; A loading module, wherein the loading module comprises a loading power member and a loading head, wherein the loading power member is arranged on the test bench and is located at one side of the test interval; the loading head is connected to the loading power member and is arranged toward the test interval; The detection module includes a torque detection unit and a temperature detection unit. The torque detection unit is located between the rotating drive member and the test shaft. The temperature detection unit is arranged on the test bench. The detection end of the temperature detection unit passes through the loading head and corresponds to the outer ring of the test bearing.

2. The aircraft landing joint bearing performance test equipment according to claim 1, characterized in that: The test shafts are respectively connected to the mounting seats through accompanying test bearings.

3. The aircraft landing joint bearing performance test equipment according to claim 2, characterized in that: The companion test bearing is a rolling bearing.

4. The aircraft landing joint bearing performance test equipment according to claim 2, characterized in that: The test shaft comprises a support section, the support section is provided with an inner ring locking unit, and the test section is provided with an inner ring sleeve.

5. The aircraft landing joint bearing performance test equipment according to claim 1, characterized in that: It also includes a pulling plate, which is arranged between the loading power member and the mounting seat and is fixedly connected to the loading power member and the mounting seat respectively; the loading head is located between the test bench and the pulling plate.

6. The aircraft landing joint bearing performance test equipment according to claim 1, characterized in that: The driving module also includes a counter for detecting the number of swings of the rotating driving member.

7. The aircraft landing joint bearing performance test equipment according to claim 1, characterized in that: The detection module comprises a displacement detection unit, which is arranged on the test bench. The detection end of the displacement detection unit passes through the loading head and contacts the outer ring of the test bearing.

8. The aircraft landing joint bearing performance test equipment according to any one of claims 1 to 7, characterized in that: The loading head comprises a loading ring, and the loading ring is sleeved outside the test segment of the test shaft.

9. The aircraft landing joint bearing performance test equipment according to claim 8, characterized in that: The loading head also includes a transition rod, one end of which is connected to the loading power member, and the other end of which is detachably connected to the loading ring.

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