Aviation airframe roller bearing test device

Abstract

The utility model relates to the field of bearings, and particularly discloses an aviation airframe roller bearing test device. The aviation airframe roller bearing test device comprises a rack, a dynamic operation module, a loading module and a test tool, the dynamic operation module is arranged on the rack, and the dynamic operation module comprises a sliding plate and a sliding driving assembly; the test tool comprises a base, an adjusting seat and a bearing limiting assembly, and the base is connected with the loading module; the adjusting seat is rotatably and movably connected with the base, and an angle adjusting mechanism is arranged between the adjusting seat and the base; the bearing limiting assembly comprises a center shaft and two installation supporting legs, and the center shaft is located between the two installation supporting legs. And the mounting supporting legs are connected with the adjusting seat. The aviation airframe roller bearing test device can simulate the dynamic operation mode of the aviation airframe roller bearing, and has the advantages of convenient installation and adjustment, real working condition simulation and reliable detection result.

Description

Technical Field

[0001] This utility model relates to the field of bearings, and in particular to a testing device for aircraft airframe roller bearings. Background Technology

[0002] Aircraft airframe roller bearings are key components used in aircraft airframes. They are commonly used in wing folding mechanisms, flight control systems, cargo door and service door mechanisms, etc. They are mainly used to bear radial loads and a small amount of axial loads, enabling related components to move stably along a predetermined motion trajectory. They play an important role in many systems of an aircraft.

[0003] Aircraft airframe roller bearings typically consist of an inner ring, an outer ring, and rolling elements. The inner and outer rings are generally made of high-strength, high-hardness metal materials, such as bearing steel, to withstand enormous loads and frictional forces. The operating condition of aircraft airframe roller bearings differs from that of conventional rolling bearings. Conventional rolling bearings mostly operate with the inner ring rotating while the outer ring remains stationary; aircraft airframe roller bearings, however, operate with the outer ring rotating while the inner ring is fixed in place. They offer advantages such as high precision, high load capacity, high reliability, good corrosion resistance, and resistance to high and low temperatures.

[0004] Aircraft airframe roller bearings have very high requirements for product service life and reliability. Therefore, life testing of aircraft airframe roller bearings is necessary. Existing common bearing life testing equipment and processes mainly target the wear failure of rolling elements and raceways. However, the main wear form of aircraft airframe roller bearings is outer ring wear. Therefore, life testing equipment and processes need to be designed specifically for this purpose.

[0005] Chinese invention patent CN 104374572B discloses a life testing system and method for large forklift mast roller bearing units, including a test head component, a loading component, a transmission component, a frame, and a control and monitoring system. The roller bearing unit is mounted on a guide rail of the test head component, which can slide and contact the transmission wheel. The transmission wheel is mounted on a transmission shaft, which is driven by a variable frequency motor, a reducer, and a sprocket chain, achieving stepless speed regulation through frequency conversion. The loading system adopts a reduced-pressure stabilization loading principle. The control and monitoring system includes a temperature sensor, a speed sensor, a vibration sensor, an industrial control computer, and a display. The sensors transmit the measured vibration and temperature signals of the roller bearing unit to the display via the industrial control computer. This invention operates stably under test conditions, tests a wide range of bearings, and can test the operating conditions of large forklift mast roller bearing units.

[0006] The forklift mast roller bearing in the above application also operates under the condition of outer ring rotation, but the difference is that the forklift roller bearing operates by rotating up and down rather than rotating left and right, and the bearing load is fundamentally different from the load form of the aircraft body roller bearing in this application. Therefore, the life test system in the above invention patent is difficult to be directly applied to the test of aircraft body roller bearings. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to provide a test device for aircraft airframe roller bearings, which can simulate the dynamic operation mode of aircraft airframe roller bearings and has the advantages of convenient installation and adjustment, realistic simulation of working conditions, and reliable test results.

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: A test device for aircraft airframe roller bearings, comprising at least:

[0009] frame;

[0010] A dynamic operation module is mounted on a frame; the dynamic operation module includes a sliding plate and a sliding drive assembly, the sliding drive assembly being used to drive the sliding plate to translate.

[0011] A loading module is mounted on a frame, with its loading end facing the slide plate.

[0012] The test fixture includes a base, an adjusting seat, and a bearing limiting assembly. The base is connected to the loading end of the loading module. The adjusting seat is rotatably connected to the base, and an angle adjustment mechanism is provided between the adjusting seat and the base. The rotation center line of the adjusting seat is set along the loading direction of the loading module. The bearing limiting assembly includes a central shaft and two mounting legs, which are arranged opposite to each other, forming a bearing mounting area between them. The central shaft is located between the two mounting legs. The mounting legs are connected to the adjusting seat, and the mounting legs can be adjusted relative to the adjusting seat along the axial direction of the central shaft.

[0013] During the test, the test bearing is installed within the bearing mounting area and fitted onto the central shaft. The loading module activates, bringing the outer ring of the test bearing into contact with the sliding plate and applying a preset load. The dynamic operation module drives the sliding plate to translate, causing the outer ring of the test bearing to rotate. The outer ring of the test bearing rolls relative to the sliding plate, simulating the operating conditions of an aircraft airframe roller bearing. Based on the amount of wear on the outer ring of the test bearing after a specific operating time, it can be determined whether the service life of the test bearing meets the standard.

[0014] The adjusting seat and base are rotatably adjustable. Rotating the adjusting seat allows adjustment of the test bearing's installation direction, ensuring that the bearing's rotation direction aligns with the sliding plate's sliding direction. This prevents bearing jamming and excessive wear due to uneven loading, ensuring accurate and reliable test results. The mounting legs can be adjusted relative to the adjusting seat along the central axis. Adjusting the position of the mounting legs relative to the adjusting seat, as well as the relative position between the two legs, adjusts the contact position between the test bearing and the sliding plate, preventing uneven loading on the sliding plate. It also allows adjustment of the bearing installation interval to accommodate test bearings of different specifications.

[0015] Preferably, the sliding drive assembly includes a translation drive unit and a sliding block. The sliding block is slidably connected to the frame, and the translation drive unit is connected to the sliding block and used to drive the sliding block to move. The sliding plate is connected to the sliding block, and the sliding plate can float relative to the sliding block in a direction perpendicular to the sliding plate. The floating sliding plate can buffer the applied force to a certain extent.

[0016] Preferably, the sliding plate includes a main body and a friction panel, wherein the friction panel is detachably disposed on the side of the main body corresponding to the loading module.

[0017] Depending on the test conditions required for the bearing, friction panels with different coefficients of friction can be set to improve the realism of the simulation. Furthermore, the friction panels can be easily replaced when they wear out.

[0018] Preferably, the loading module includes a loading bracket and a loading unit. The loading bracket includes two sets of support guide rods, and the loading unit is connected to the frame through the support guide rods. The sliding plate is located between the two sets of support guide rods. There are two loading modules, and the two loading modules are opposite each other relative to the sliding plate.

[0019] The support guide rod can support the loading module, and the cooperation between the guide unit and the support guide rod can guide the feed movement of the test fixture.

[0020] Preferably, the base is provided with several guide units, each guide unit including a clamping mechanism, the support guide rod is inserted into the clamping mechanism, and the clamping mechanism and the corresponding support guide rod have an adjustable gap.

[0021] By adjusting the gap between the clamping mechanism and the corresponding support guide rod, the guiding accuracy between the guide unit and the support guide rod is effectively improved, the friction and wear between the guide unit and the support guide rod are reduced, and the lateral force on the loading module can be effectively avoided, thereby improving the accuracy and lifespan of the loading module.

[0022] Preferably, the system also includes an environmental simulation module, which comprises a test chamber, a temperature simulation component, and a medium simulation component. The test apparatus is located inside the test chamber, and the sliding plate is partially or entirely placed inside the test chamber. The temperature simulation component is used to adjust the temperature inside the test chamber. The medium simulation component includes a medium spraying component, which is used to spray the medium into the test chamber.

[0023] Because the working environment of aircraft airframe roller bearings is complex and variable, including high and low temperature conditions, as well as various complex media conditions such as salt spray and dust conditions, the environmental simulation module can simulate various conditions in the test chamber according to the requirements, ensuring that the operating conditions of the test bearings are realistic and the test results are reliable.

[0024] Preferably, the test fixture is provided with a first instrument mounting position, and the sliding plate is provided with a second instrument mounting position; the aircraft airframe roller bearing test device also includes a parallelism detection module, which includes a measuring instrument and an instrument mounting assembly. The instrument mounting assembly includes an instrument base and an adjustment bracket. The instrument base is used to detachably connect to the first and second instrument mounting positions on the test fixture. The measuring instrument is connected to the instrument base through the adjustment bracket, and the position and attitude of the measuring instrument can be adjusted.

[0025] Ideally, the mounting direction of the sliding plate should be perfectly parallel to its sliding direction. However, in practice, there is often a certain parallelism error between the mounting direction and the sliding direction. As the sliding plate slides, the contact position between the test bearing and the sliding plate will also shift, resulting in a certain degree of off-center loading on the sliding plate. By detecting the parallelism of the sliding plate, the degree of off-center loading during sliding can be effectively reduced, thereby improving the reliability of the test results.

[0026] Ideally, the running direction of the test bearing should be completely parallel to the sliding direction of the slide plate. When the end face of the test bearing is parallel to the side of the adjusting seat, it can be equivalently understood that the side of the adjusting seat is parallel to the sliding direction of the slide plate. However, in practice, the installation direction of the adjusting seat often has a certain angular error with the sliding direction of the slide plate. During the reciprocating rolling motion of the test bearing along the slide plate, it is easy to cause the test bearing to jam or wear unevenly. By detecting the angle of the adjusting seat relative to the sliding direction of the slide plate, the running direction of the test bearing can be adjusted to a certain extent, effectively improving the jamming or uneven wear problem during the operation of the test bearing, thereby improving the reliability of the test results.

[0027] Preferably, the side of the adjusting seat is provided with an adjusting arm; the angle adjusting assembly includes an adjusting execution unit corresponding to each adjusting arm, the adjusting execution unit includes at least one pair of adjusting screws, the adjusting screws are threadedly connected to the base; one end of the adjusting screw is connected to a ball; the balls of each pair of adjusting screws are arranged opposite each other on both sides of the corresponding adjusting arm.

[0028] The adjusting screws, positioned relative to each other, can limit the movement of the adjusting arm, thereby limiting the circumferential movement of the adjusting seat. Simultaneously, the circumferential angle of the adjusting seat can be adjusted by manipulating the adjusting screws, offering flexible operation and high adjustment precision.

[0029] Preferably, the base is provided with a mandrel, and the adjusting seat is provided with a limiting groove that matches the mandrel. The adjusting seat and the base are rotatably limited by the mandrel and the limiting groove. The adjusting assembly is provided with a plurality of first connecting holes, which extend arcuately around the axis of the limiting groove. It also includes adjusting bolts, which pass through the first connecting holes and are threadedly connected to the base.

[0030] Preferably, the adjusting seat is provided with guide ribs and two sets of mounting holes, the two sets of mounting holes being opposite each other to the guide ribs; each set of mounting holes has at least four holes, and each mounting hole in each set is distributed along the extension direction of the guide ribs; the mounting leg is provided with a guide groove and two second connecting holes, the two second connecting holes being opposite each other to the guide grooves, the second connecting holes being elongated and extending in a direction parallel to the guide grooves; it also includes mounting bolts, in the connected state, the mounting bolts passing through the second connecting holes and threadedly connected to the mounting holes.

[0031] Choosing different mounting holes allows for coarse adjustment of the bearing limiting assembly's mounting position, while shifting the mounting bolts relative to the second connecting hole allows for fine adjustment of the bearing limiting assembly's mounting position. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the aircraft airframe roller bearing testing device in this embodiment;

[0033] Figure 2 This is a schematic diagram showing the coordination of the loading module, test fixture, and dynamic operation module in the aircraft airframe roller bearing test device of this embodiment;

[0034] Figure 3 This is a front view showing the coordination of the loading module, test fixture, and dynamic operation module in the aircraft airframe roller bearing test device of this embodiment.

[0035] Figure 4This is a side view showing the coordination of the loading module, testing fixture, and dynamic operation module in the aircraft airframe roller bearing testing device of this embodiment;

[0036] Figure 5 This is a schematic diagram of the dynamic operation module in the aircraft airframe roller bearing testing device of this embodiment;

[0037] Figure 6 This is a schematic diagram of the test fixture in the aircraft airframe roller bearing test apparatus of this embodiment;

[0038] Figure 7 This is a top view of the test fixture in the aircraft airframe roller bearing test apparatus of this embodiment;

[0039] Figure 8 This is a cross-sectional view of the test fixture in the aircraft airframe roller bearing test apparatus of this embodiment;

[0040] Figure 9 This is a schematic diagram showing the coordination between the loading module, testing fixture, dynamic operation module, and parallelism detection module in the aircraft airframe roller bearing testing device of this embodiment;

[0041] Figure 10 This is a schematic diagram showing the cooperation between the test fixture, dynamic operation module, and parallelism detection module in the aircraft airframe roller bearing test device of this embodiment. The measuring instruments are installed in the first instrument mounting position of the test fixture.

[0042] Figure 11 This is a schematic diagram of the cooperation between the test fixture, dynamic operation module and parallelism detection module in the aircraft airframe roller bearing test device of this embodiment. The measuring instruments are installed at the second instrument mounting position on the sliding plate.

[0043] Figure 12 This is a schematic diagram showing the state in which the installation direction of the sliding plate and the sliding direction of the sliding plate are not parallel in the aircraft airframe roller bearing test device of this embodiment;

[0044] Figure 13 This is a schematic diagram showing the deviation in the installation angle of the test bearing relative to the slide plate in the aircraft airframe roller bearing test device of this embodiment;

[0045] Figure 14 This is a schematic diagram showing the state of the test bearing offset from the center of the slide plate in the horizontal direction in the test device for aircraft airframe roller bearings in this embodiment. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Example

[0047] like Figure 1 and Figure 9 As shown, an aircraft airframe roller bearing testing device includes a frame 1, a dynamic operation module 2, a loading module 3, a testing fixture 4, a parallelism detection module 7, and a control module. The dynamic operation module 2 and the loading module 3 are mounted on the frame.

[0048] like Figures 2-5 As shown, the dynamic operation module 2 includes a sliding plate 21 and a sliding drive assembly 22, which drives the sliding plate 21 to translate. Specifically, the sliding drive assembly 22 includes a translation drive unit and a sliding block. The sliding block is slidably connected to the frame 1, and the translation drive unit is connected to the sliding block and drives its movement. The sliding plate 21 is connected to the sliding block and can float relative to the sliding block in a direction perpendicular to the sliding plate 21. The sliding plate 21 includes a main body and a friction panel, which is detachably mounted on the side of the main body corresponding to the loading module. The floating sliding plate can buffer the loading force to a certain extent. According to the test conditions of the test bearing, friction panels with different friction coefficients can be set to improve the realism of the simulation. At the same time, the friction panel can be easily replaced when it wears out.

[0049] like Figures 2-4 As shown, the loading end of the loading module 3 is positioned towards the sliding plate 21. Specifically, the loading module 3 includes a loading bracket and a loading unit. The loading bracket includes two sets of support guide rods 31. The loading unit is connected to the frame 1 through the support guide rods 31. The sliding plate 21 is located between the two sets of support guide rods 31.

[0050] The loading modules 3 are two in number, positioned opposite each other to the sliding plate 21. The loads applied to the sliding plate by the two sets of loading modules are offset and cancel each other out, reducing the load on the sliding plate and minimizing its deformation. However, during loading, it is difficult to achieve perfect synchronization of the loading speeds of the two loading modules; that is, during the loading process, the loads applied to the sliding plate by the two loading modules will inevitably be inconsistent. The sliding plate 21 can be floated relative to the sliding block in a direction perpendicular to the sliding plate 21. When the loading speed on one side is faster, the sliding plate can be buffered by floating, preventing excessive load on the sliding plate in stages.

[0051] like Figure 6 and Figure 7As shown, the base 41 is provided with a plurality of guide units 411, each guide unit 411 including a clamping mechanism, the support guide rod 31 being inserted into the clamping mechanism, and the clamping mechanism and the corresponding support guide rod 31 being provided with a rolling friction pair with adjustable clearance.

[0052] The support guide rod 31 supports the loading module 3, and the cooperation between the guide unit 411 and the support guide rod 31 guides the feed motion of the test fixture 4. By adjusting the gap between the clamping mechanism and the corresponding support guide rod, the guiding accuracy between the guide unit and the support guide rod is effectively improved, the friction and wear between the guide unit and the support guide rod are reduced, and the lateral force on the loading module is effectively avoided, thus improving the accuracy and lifespan of the loading module.

[0053] like Figures 6-8 As shown, the test fixture 4 includes a base 41, an adjusting seat 42, and a bearing limiting assembly 43. The base 41 is connected to the loading end of the loading module 3. The adjusting seat 42 is rotatably connected to the base 41, and an angle adjustment mechanism is provided between the adjusting seat 42 and the base 41. The rotation center line of the adjusting seat 42 is set along the loading direction of the loading module 3. The rotatable setting of the adjusting seat 42 and the base 41 allows the installation direction of the test bearing to be adjusted by rotating the adjusting seat 42, ensuring that the rotation direction of the test bearing is consistent with the sliding direction of the sliding plate 21. This avoids causing the test bearing to jam, which would exacerbate wear due to uneven loading, thus ensuring accurate and reliable test results.

[0054] like Figures 6-8 As shown, specifically, the base 41 is provided with a mandrel, and the adjusting seat 42 is provided with a limiting groove that matches the mandrel. The adjusting seat 42 and the base 41 are rotatably limited by the mandrel and the limiting groove. The adjusting assembly is provided with a plurality of first connecting holes, which extend arcuately around the axis of the limiting groove. It also includes adjusting bolts, which pass through the first connecting holes and are threadedly connected to the base 41.

[0055] like Figures 6-8 As shown, specifically, the side of the adjusting base 42 is provided with adjusting arms 421. The angle adjusting assembly includes adjusting execution units corresponding to the adjusting arms 421 one by one. Each adjusting execution unit includes at least one pair of adjusting screws 44, which are threadedly connected to the base 41. One end of each adjusting screw 44 is connected to a ball bearing, and the balls bearings of each pair of adjusting screws 44 are arranged opposite to each other on both sides of the corresponding adjusting arm 421.

[0056] The adjusting screw 44, which is positioned opposite to the adjusting arm 421, can limit the circumferential movement of the adjusting seat 42. Simultaneously, the circumferential angle of the adjusting seat 42 can be adjusted by operating the adjusting screw 44, offering flexible operation and high adjustment precision.

[0057] like Figures 6-8 As shown, the bearing limiting assembly 43 includes a central shaft and two mounting legs. The two mounting legs are arranged opposite to each other, forming a bearing mounting area between them. The central shaft is located between the two mounting legs. The mounting legs are connected to an adjusting seat 42, and the mounting legs can be adjusted relative to the adjusting seat 42 along the axial direction of the central shaft.

[0058] The mounting legs can be adjusted relative to the adjusting seat 42 along the axis of the central shaft. By adjusting the position of the mounting legs, the position of the mounting legs relative to the adjusting seat 42 and the relative position between the two legs can be adjusted, thereby adjusting the contact position between the test bearing and the slide plate 21, avoiding uneven loading of the slide plate 21, and also adjusting the distance of the bearing installation area to accommodate test bearings of different specifications.

[0059] Specifically, the adjusting seat 42 is provided with guide ribs and two sets of mounting holes, which are positioned opposite each other relative to the guide ribs. Each set of mounting holes contains at least four holes, and the holes in each set are distributed along the extension direction of the guide ribs. The mounting leg is provided with a guide groove and two second connecting holes, which are positioned opposite each other relative to the guide groove. The second connecting holes are elongated and extend parallel to the guide groove. Mounting bolts are also included; in the connected state, the mounting bolts pass through the second connecting holes and are threaded into the mounting holes.

[0060] Choosing different mounting holes allows for coarse adjustment of the mounting position of the bearing limiting assembly 43, while the mounting position of the bearing limiting assembly 43 can be finely adjusted by shifting the mounting bolts relative to the second connecting hole.

[0061] The control module is used to control the operation of the dynamic operation module 2 and the loading module 3, and to monitor the operating status of each module. Specifically, the control module includes an eccentric load detection unit, a torque detection unit, an online friction coefficient detection unit, and an online wear detection unit.

[0062] The aforementioned off-center load detection unit is used to detect the position of the test bearing relative to the slide plate 21. Each off-center load detection unit corresponds to one of the adjusting screws and is positioned between the adjusting screw and its corresponding ball bearing. In one specific embodiment, the off-center load detection unit is a pressure sensor. The off-center load detection unit can detect the force between the adjusting screw and the adjusting arm 421. During the test, if there is a deviation in the installation angle of the test bearing relative to the slide plate 21, i.e.... Figure 13 In the state shown, angle α is the deviation angle. The force exerted by the adjusting arm 421 on the adjusting screws on both sides will change, and the trend of force change of the corresponding adjusting screws on both sides will be different. The off-center load direction and degree of the test bearing can be determined by the measurement results of the off-center load detection unit in each pair of adjusting screws, providing a basis for adjusting the installation direction of the test bearing.

[0063] The torque detection unit is positioned between the sliding plate and the sliding block to monitor the torque applied to the sliding plate. During the test, if the test bearing shifts horizontally from the center of the sliding plate, i.e.... Figure 14 As shown, under the load of the test bearing, the sliding plate will experience a bending moment, causing uneven axial loading on the test bearing and affecting the reliability of the test results. By detecting the torque of the sliding plate, the horizontal deviation of the test bearing can be evaluated. When the torque of the sliding plate exceeds the preset value, the horizontal position of the test bearing relative to the sliding plate can be adjusted by adjusting the position of the bearing limit assembly relative to the adjusting seat.

[0064] The aforementioned online friction coefficient detection unit is installed between the sliding block and the sliding plate to monitor the driving force of the sliding plate's translational motion in real time, and indirectly evaluate the friction coefficient of the outer ring of the test bearing, providing a basis for judging the results of the test bearing life test.

[0065] The wear online detection unit is installed in the loading module to monitor the displacement of the piston rod of the loading cylinder in the loading module in real time, and indirectly evaluate the wear of the outer ring of the test bearing, and provide a basis for judging the results of the test bearing life test.

[0066] like Figures 9-11 As shown, the test fixture has a first instrument mounting position, and the sliding plate has a second instrument mounting position. The parallelism detection module 7 includes a measuring instrument 73 and an instrument mounting assembly. The instrument mounting assembly includes an instrument base 71 and an adjusting bracket 72. The instrument base 71 is used for detachable connection with the first and second instrument mounting positions on the test fixture. The measuring instrument 73 is connected to the instrument base 71 through the adjusting bracket 72, and the position and orientation of the measuring instrument 73 can be adjusted.

[0067] Ideally, the installation direction of the slide should be perfectly parallel to its sliding direction. However, in practice, there is often a certain degree of parallelism error between the installation direction and the sliding direction. Figure 12 The state shown is illustrated, where angle β is the deviation angle. As the slide plate slides, the contact position between the test bearing and the slide plate will also shift to a certain extent, resulting in a certain degree of off-center loading on the slide plate. By detecting the parallelism of the slide plate, the degree of off-center loading during the sliding process can be effectively reduced, thereby improving the reliability of the test results.

[0068] Ideally, the running direction of the test bearing should be completely parallel to the sliding direction of the slide plate. When the end face of the test bearing is parallel to the side of the adjusting seat, it can be equivalently understood that the side of the adjusting seat is parallel to the sliding direction of the slide plate. However, in practice, the installation direction of the adjusting seat often has a certain angular error with the sliding direction of the slide plate. During the reciprocating rolling motion of the test bearing along the slide plate, it is easy to cause the test bearing to jam or wear unevenly. By detecting the angle of the adjusting seat relative to the sliding direction of the slide plate, the running direction of the test bearing can be adjusted to a certain extent, effectively improving the jamming or uneven wear problem during the operation of the test bearing, thereby improving the reliability of the test results.

[0069] During the test, the test bearing 6 is installed within the bearing mounting area and fitted onto the central shaft. The loading module 3 operates, bringing the outer ring of the test bearing 6 into contact with the sliding plate 21 and applying a preset load. The dynamic operation module 2 drives the sliding plate 21 to translate, causing the outer ring of the test bearing 6 to rotate. The outer ring of the test bearing 6 rolls relative to the sliding plate 21, simulating the operating conditions of an aircraft airframe roller bearing. Based on the wear amount of the outer ring of the test bearing 6 after a specific operating time, it can be determined whether the service life of the test bearing 6 meets the standard.

[0070] Furthermore, such as Figure 1 As shown, it also includes an environmental simulation module 5, which comprises a test chamber, a temperature simulation component, and a medium simulation component. The test fixture 4 is placed inside the test chamber, and the sliding plate 21 is partially or entirely placed inside the test chamber. The temperature simulation component is used to regulate the temperature inside the test chamber. The medium simulation component includes a medium spraying component, which is used to spray the medium onto the test bearing inside the test chamber. The angle and distance of the medium spraying component are adjustable.

[0071] Because the working environment of aircraft airframe roller bearings is complex and variable, including high temperature and low temperature conditions, as well as various complex media conditions such as salt spray and dust conditions, the environmental simulation module 5 can simulate various conditions in the test chamber according to the requirements, ensuring that the operating conditions of the test bearings are realistic and the test results are reliable.

[0072] A test method for aircraft airframe roller bearings, using the aircraft airframe roller bearing test device as described above;

[0073] At least the following steps are included:

[0074] S01. Parallelism Detection:

[0075] When installing or replacing the skid plate for the first time, such as Figure 10 As shown, the first instrument mounting position of the instrument base 71 is connected to the test fixture, and the measuring instrument 73 is adjusted so that the detection end of the measuring instrument 73 contacts the side of the sliding plate 21; the dynamic test module works, the sliding plate 21 moves a preset distance, and the parallelism of the side of the sliding plate relative to the sliding direction of the sliding plate is determined according to the change in the reading of the measuring instrument 73; if the change in the reading of the measuring instrument 73 exceeds the preset value, the installation direction of the sliding plate is adjusted, and step S01 is repeated.

[0076] When changing the test fixtures, such as Figure 11 As shown, connect the instrument base to the second instrument mounting position of the sliding plate, adjust the measuring instrument so that the detection end of the measuring instrument contacts the side of the adjusting seat; the dynamic test module works, the sliding plate moves a preset distance, and the angle of the side of the adjusting seat relative to the sliding direction of the sliding plate is determined according to the change of the measuring instrument reading; if the change of the measuring instrument reading exceeds the preset value, the installation direction of the adjusting seat is adjusted by the angle adjustment mechanism, and step S01 is repeated.

[0077] S1. Installation: Install the test bearing on the test fixture 4; wherein the test bearing is located within the bearing installation area and is sleeved on the central shaft.

[0078] S2. Adjustment: Loading module 3 is activated, the test bearing contacts the sliding plate 21, and a preset load is applied; dynamic operation module 2 is tested, the sliding plate 21 moves in translation, and drives the test bearing to rotate.

[0079] The off-center load detection unit detects the position of the test bearing and determines the direction and degree of offset of the test bearing relative to the running direction of the sliding plate 21. The torque detection unit monitors the torque on the sliding plate and determines the direction and degree of offset of the test bearing relative to the sliding plate in the horizontal direction.

[0080] If the measured value of the eccentric load detection unit is greater than the preset value, the loading module will unload the load. The operator will then adjust the installation angle of the test bearing through the angle adjustment mechanism based on the measured value of the eccentric load detection unit, and repeat the S2 operation.

[0081] If the measured value of the torque detection unit is greater than the preset value, the loading module will unload the load. The operator will then adjust the position of the bearing limit assembly relative to the adjusting seat based on the measured value of the torque detection unit and repeat the S2 operation.

[0082] S3. Operation: The dynamic test module operates, the sliding plate 21 reciprocates for a preset time, and the test bearing moves synchronously. During the test, the online friction coefficient detection unit operates to monitor and record the magnitude of the driving force applied by the sliding drive assembly 22 in real time, and the online wear detection unit operates to monitor and record the load applied by the loading module in real time.

[0083] S4. Post-processing of results: Measure the change in the outer diameter of the outer ring of the test bearing, and determine whether the life of the test bearing meets the standard based on the change in driving force applied by the sliding drive assembly 22, the load applied by the loading module, and the change in the outer diameter of the outer ring of the test bearing.

[0084] In one specific implementation, during step S2, when the loading module applies the load, the two loading modules apply the load sequentially until the load applied by the two loading modules reaches the preset value.

[0085] As a specific implementation method, in step S3, the environmental simulation module works according to the test requirements and simulates the preset temperature and medium environment.

[0086] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing device for aircraft airframe roller bearings, characterized in that, At least including: frame; A dynamic operation module is mounted on a frame; the dynamic operation module includes a sliding plate and a sliding drive assembly, the sliding drive assembly being used to drive the sliding plate to translate. A loading module is mounted on a frame, with its loading end facing the slide plate. The test fixture includes a base, an adjusting seat, and a bearing limiting assembly. The base is connected to the loading end of the loading module. The adjusting seat is rotatably connected to the base, and an angle adjustment mechanism is provided between the adjusting seat and the base. The rotation center line of the adjusting seat is set along the loading direction of the loading module. The bearing limiting assembly includes a central shaft and two mounting legs, which are arranged opposite to each other, forming a bearing mounting area between them. The central shaft is located between the two mounting legs. The mounting legs are connected to the adjusting seat, and the mounting legs can be adjusted relative to the adjusting seat along the axial direction of the central shaft.

2. The aircraft airframe roller bearing testing device according to claim 1, characterized in that: The sliding drive assembly includes a translation drive unit and a sliding block. The sliding block is slidably connected to the frame. The translation drive unit is connected to the sliding block and is used to drive the sliding block to move. The sliding plate is connected to the sliding block and can float relative to the sliding block in a direction perpendicular to the sliding plate.

3. The aircraft airframe roller bearing testing device according to claim 1, characterized in that: The sliding plate includes a main body and a friction panel, which is detachably mounted on the side of the main body corresponding to the loading module.

4. The aircraft airframe roller bearing testing device according to claim 1, characterized in that: The loading module includes a loading bracket and a loading unit. The loading bracket includes two sets of support guide rods, and the loading unit is connected to the frame through the support guide rods. The sliding plate is located between the two sets of support guide rods. There are two loading modules, and the two loading modules are opposite each other relative to the sliding plate.

5. The aircraft airframe roller bearing testing device according to claim 4, characterized in that: The base is provided with several guide units, each guide unit including a clamping mechanism. The support guide rod is inserted into the clamping mechanism, and the clamping mechanism and the corresponding support guide rod are provided with an adjustable rolling friction pair.

6. The aircraft airframe roller bearing testing device according to claim 1, characterized in that: It also includes an environmental simulation module, which comprises a test chamber, a temperature simulation component, and a medium simulation component. The test apparatus is located inside the test chamber, and the sliding plate is partially or entirely placed inside the test chamber. The temperature simulation component is used to adjust the temperature inside the test chamber. The medium simulation component includes a medium spraying component, which is used to spray the medium into the test chamber.

7. The aircraft airframe roller bearing testing device according to claim 1, characterized in that: The test fixture is provided with a first instrument mounting position, and the sliding plate is provided with a second instrument mounting position; the aircraft airframe roller bearing test device also includes a parallelism detection module, which includes a measuring instrument and an instrument mounting assembly. The instrument mounting assembly includes an instrument base and an adjustment bracket. The instrument base is used to detachably connect to the first and second instrument mounting positions on the test fixture. The measuring instrument is connected to the instrument base through the adjustment bracket, and the position and attitude of the measuring instrument can be adjusted.

8. The aircraft airframe roller bearing testing apparatus according to any one of claims 1-7, characterized in that: The side of the adjustment base is provided with an adjustment arm; the angle adjustment assembly includes an adjustment execution unit corresponding to each adjustment arm, the adjustment execution unit includes at least one pair of adjustment screws, the adjustment screws are threadedly connected to the base; one end of the adjustment screw is connected to a ball; the balls of each pair of adjustment screws are arranged opposite each other on both sides of the corresponding adjustment arm.

9. The aircraft airframe roller bearing testing device according to claim 8, characterized in that: The base is provided with a mandrel, and the adjusting seat is provided with a limiting groove that matches the mandrel. The adjusting seat and the base are rotatably limited by the mandrel and the limiting groove. The adjusting assembly is provided with a plurality of first connecting holes, which extend arcuately around the axis of the limiting groove. It also includes an adjusting bolt, which passes through the first connecting hole and is threadedly connected to the base.

10. The aircraft airframe roller bearing testing apparatus according to claim 8, characterized in that: The adjusting seat is provided with guide ribs and two sets of mounting base holes, which are positioned opposite each other to the guide ribs. Each set of mounting base holes has at least four holes, and the mounting base holes in each set are distributed along the extension direction of the guide ribs. The mounting leg is provided with guide grooves and two second connecting holes, which are positioned opposite each other to the guide grooves. The second connecting holes are elongated and extend in a direction parallel to the guide grooves. The seat also includes mounting bolts, which, in the connected state, pass through the second connecting holes and are threadedly connected to the mounting base holes.

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