An aircraft body roller bearing test device and test method

Abstract

The present invention relates to the field of bearings, and specifically discloses an aviation airframe roller bearing test device and a test method. The aviation airframe roller bearing test device therein includes a frame, a dynamic operation module, a loading module and a test tooling. The dynamic operation module is arranged on the frame, and the dynamic operation module includes a sliding plate and a sliding driving assembly; the test tooling includes a base, an adjusting seat and a bearing limiting assembly. The base is connected to the loading module; the adjusting seat is rotatably and movably connected to the base, and an angle adjusting mechanism is arranged between the adjusting seat and the base; the bearing limiting assembly includes a central shaft and two mounting legs, and the central shaft is located between the two mounting legs; the mounting legs are connected to the adjusting seat. The above-mentioned 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 test results.

Description

Technical Field

[0001] The invention relates to the field of bearings, and in particular to an aircraft body roller bearing test device and a test method. Background Art

[0002] Aircraft body roller bearings are key components used in aircraft bodies and are often used in wing folding mechanisms, flight control systems, cargo doors and service door mechanisms. They are mainly used to bear radial loads and a small amount of axial loads, allowing related components to move stably along predetermined motion tracks, and play an important role in multiple systems of the aircraft.

[0003] Aircraft body roller bearings are usually composed of inner rings, outer rings, rolling elements and other components. The inner rings and outer rings are generally made of high-strength, high-hardness metal materials, such as bearing steel, to withstand huge loads and friction. The operating state of aircraft body roller bearings is different from that of conventional rolling bearings. Conventional rolling bearings are mostly operated in the condition that the inner ring rotates without the outer ring rotating. The operating state of aircraft body roller bearings is that the outer ring rotates and the inner ring is fixed. It has the advantages of high precision, high load, high reliability, good corrosion resistance, high and low temperature resistance, etc.

[0004] Aircraft body roller bearings have very high requirements for product service life and reliability, so aircraft body roller bearings need to be tested for life. The existing common bearing life testing equipment and processes mainly target the wear failure of rolling elements and grooves, but the main form of wear of aircraft body roller bearings is outer ring wear, so targeted design of life testing equipment and processes is required.

[0005] The Chinese invention patent with the authorization announcement number CN 104374572B discloses a life test system and test method for roller bearing units of large forklift masts, including a test head component, a loading component, a transmission component, a frame and a control and monitoring system. The roller bearing unit is installed on the guide rail of the test head component, and the guide rail can slide and contact the transmission wheel; the transmission wheel is installed on the transmission shaft, and the transmission shaft is driven by a variable frequency motor, a reducer and a sprocket chain, and stepless speed regulation is achieved through frequency conversion; the loading system adopts the principle of pressure reduction and voltage stabilization loading; the control and monitoring system includes a temperature sensor, a speed sensor, a vibration sensor, an industrial computer and a display; the sensor displays the measured roller bearing unit vibration and roller bearing unit temperature signals on the display through the industrial computer. The invention operates stably under test conditions, has a wide range of test bearings, and can test the working conditions of large forklift mast roller bearing units.

[0006] The fork truck mast roller bearing in the above application also operates with the outer ring rotating. However, the difference is that the fork truck roller bearing rotates up and down rather than moves left and right, and the load-bearing condition of the bearing is essentially 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 the aircraft body roller bearing. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an aircraft body roller bearing test device and a test method, which can simulate the dynamic operation mode of the aircraft body roller bearing, and have the advantages of convenient installation and adjustment, real working condition simulation, and reliable detection results.

[0008] To solve the above technical problem, the technical solution provided by the present invention is as follows: An aircraft body roller bearing test device at least includes:

[0009] A frame;

[0010] A dynamic operation module, the dynamic operation module is arranged on the frame; the dynamic operation module includes a sliding plate and a sliding driving component, and the sliding driving component is used to drive the sliding plate to move translationally;

[0011] A loading module, the loading module is arranged on the frame, and the loading end of the loading module faces the sliding plate;

[0012] A test tooling, the test tooling includes a base, an adjustment seat and a bearing limiting component, the base is connected to the loading end of the loading module; the adjustment seat is rotatably connected to the base, and an angle adjustment mechanism is arranged between the adjustment seat and the base, and the rotation center line of the adjustment seat is arranged along the loading direction of the loading module; the bearing limiting component includes a central shaft and two mounting legs, the two mounting legs are arranged oppositely, and a bearing installation interval is formed between the two mounting legs; the central shaft is located between the two mounting legs; the mounting legs are connected to the adjustment seat, and the mounting legs can be adjusted relative to the adjustment seat along the axial direction of the central shaft;

[0013] A control module, the control module is used to control the dynamic operation module and the loading module to work, and is used to detect the position state of the test bearing relative to the sliding plate.

[0014] During the test, the test bearing is installed within the bearing installation area and sleeved on the central shaft. The loading module operates, with the outer ring of the test bearing in contact with the sliding plate and a preset load applied. The dynamic operation module drives the sliding plate to move translationally and drives the outer ring of the test bearing to rotate. The outer ring of the test bearing and the sliding plate roll relative to each other to simulate the operating conditions of the roller bearing of the aircraft body. Based on the wear amount of 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.

[0015] The adjustment seat and the base are rotatably arranged. By rotating the adjustment seat, the installation direction of the test bearing can be adjusted to ensure that the rotation direction of the test bearing is consistent with the sliding direction of the sliding plate, avoiding jamming of the test bearing and excessive wear due to eccentric load, and ensuring the accuracy and reliability of the test results. The installation legs can be adjusted relative to the adjustment seat along the axis direction of the central shaft. By adjusting the position of the installation legs, the position of the installation legs relative to the adjustment seat and the relative position between the two legs can be adjusted, thereby adjusting the contact position between the test bearing and the sliding plate, avoiding eccentric load on the sliding plate, and at the same time, the distance of the bearing installation area can also be adjusted to accommodate test bearings of different specifications.

[0016] Preferably, 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 the sliding plate can float relative to the sliding block in a direction perpendicular to the sliding plate.

[0017] The floating sliding plate can buffer the loading force to a certain extent. The sliding plate includes a main body and a friction panel. The friction panel is detachably arranged on the side of the main body corresponding to the loading module.

[0018] According to the test working condition requirements of the test bearing, friction panels with different friction coefficients can be set to improve the authenticity of the working condition simulation. At the same time, when the friction panel wears, it can be replaced conveniently.

[0019] Preferably, the loading module includes a loading bracket and a loading unit. The loading bracket includes two groups of support guide rods. The loading unit is connected to the frame through the support guide rods. The sliding plate is located between the two groups of support guide rods. The number of the loading modules is two, and the two loading modules are opposed to each other with respect to the sliding plate.

[0020] A number of guiding units are provided on the base. The guiding unit includes a hoop mechanism. The support guide rod is inserted into the hoop mechanism, and there is an adjustable gap between the hoop mechanism and the corresponding support guide rod.

[0021] The supporting guide rod can support the loading module, and the cooperation between the guiding unit and the supporting guide rod can guide the feeding movement of the test tooling. By adjusting the clearance between the hoop mechanism and the corresponding supporting guide rod, the guiding accuracy between the guiding unit and the supporting guide rod is effectively improved, the friction and wear between the guiding unit and the supporting guide rod are reduced, and at the same time, the lateral force on the loading module can be effectively avoided, improving the accuracy and service life of the loading module.

[0022] Preferably, it further includes an environment simulation module. The environment simulation module includes a test chamber, a temperature simulation component and a medium simulation component. The test tooling is placed in the test chamber, and part or all of the sliding plate is placed in the test chamber; the temperature simulation component is used to adjust the temperature in the test chamber; the medium simulation component includes a medium spraying component, and the medium spraying component is used to spray the medium into the test chamber.

[0023] Due to the complex and changeable working environment of the aircraft body roller bearing, there are high-temperature and low-temperature working conditions, and there are also various complex medium working conditions, such as salt spray working conditions, dust working conditions, etc. Through the environment simulation module, various working conditions can be simulated in the test chamber according to requirements, ensuring the authenticity of the operating conditions of the test bearing and the reliability of the test results.

[0024] Preferably, an adjusting arm is provided on the side of the adjusting seat; the angle adjusting component includes an adjusting execution unit corresponding to the adjusting arm one by one. The adjusting execution unit includes at least a pair of adjusting screws, and the adjusting screws are threadedly connected to the base; one end of the adjusting screw is connected with a ball; the balls of each pair of adjusting screws are arranged oppositely on both sides of the corresponding adjusting arm.

[0025] The oppositely arranged adjusting screws can limit the adjusting arm, thereby realizing the circumferential limit of the adjusting seat. At the same time, the circumferential angle adjustment of the adjusting seat can be realized by operating the adjusting screws, with flexible operation and high adjustment accuracy.

[0026] Preferably, the control module includes a number of off-axis force detection units, and the off-axis force detection units correspond to the adjusting screws one by one and are arranged between the adjusting screws and the corresponding balls.

[0027] The off-axis force detection unit can detect the acting force between the adjusting screw and the adjusting arm. During the test, if there is a deviation in the installation angle of the test bearing relative to the sliding plate, the acting force magnitudes on the two-side adjusting screws by the adjusting arm will change, and there are differences in the changing trends of the acting forces on the corresponding adjusting screws on both sides. The off-axis direction and off-axis degree of the test bearing can be determined through the measurement results of the off-axis force detection units in each pair of adjusting screws, providing a basis for adjusting the installation direction of the test bearing.

[0028] Preferably, a mandrel is provided on the base, a limiting groove matching the mandrel is formed on the adjusting seat, and the adjusting seat and the base are rotationally limited by the mandrel and the limiting groove; a plurality of first connection holes are formed in the adjusting group, and the first connection holes extend arc-shaped around the axis of the limiting groove; an adjusting bolt is further included, and the adjusting bolt passes through the first connection hole and is threadedly connected to the base.

[0029] Preferably, guiding rib strips and two groups of mounting base holes are provided on the adjusting seat, and the two groups of mounting base holes are arranged oppositely left and right with respect to the guiding rib strips; the number of each group of mounting base holes is at least four, and each mounting base hole in each group is distributed along the extending direction of the guiding rib strips; guiding grooves and two second connection holes are provided on the mounting leg, the two second connection holes are arranged oppositely left and right with respect to the guiding grooves, the second connection holes are strip-shaped and extend along the direction parallel to the guiding grooves; an mounting bolt is further included, and in the connected state, the mounting bolt passes through the second connection hole and is threadedly connected to the mounting base hole.

[0030] Coarse adjustment of the installation position of the bearing limiting assembly can be performed by selecting different mounting base holes for installation, and fine adjustment of the installation position of the bearing limiting assembly can be achieved by shifting the mounting bolt relative to the second connection hole.

[0031] An aviation airframe roller bearing test method adopts the aviation airframe roller bearing test device as described above;

[0032] At least includes the following steps:

[0033] S1. Installation: Install the test bearing on the test tooling; wherein, the test bearing is located within the bearing installation interval and is sleeved on the central shaft.

[0034] S2. Adjustment: The loading module works, the test bearing contacts the sliding plate, and a preset load is applied; the dynamic operation module runs for a trial, the sliding plate moves translationally, and drives the test bearing to rotate; the control module detects the position state of the test bearing, and judges the deviation direction and deviation degree of the test bearing relative to the running direction of the sliding plate; if the deviation degree of the test bearing is greater than the preset value, the operator adjusts the installation angle of the test bearing according to the detection result of the control module through the angle adjustment mechanism, and performs the S2 operation again.

[0035] S3. Operation: The dynamic test module works, the sliding plate reciprocates translationally for a preset time, the test bearing moves synchronously, and the magnitude of the driving force applied by the sliding driving component is recorded.

[0036] S4. Result post-processing: Measure the change amount of the outer diameter of the outer ring of the test bearing, and judge whether the life of the test bearing meets the standard according to the change of the driving force applied by the sliding driving component and the change amount of the outer diameter of the outer ring of the test bearing.

[0037] Preferably, a first instrument mounting position is provided on the test tooling, and a second instrument mounting position is provided on the sliding plate; the aircraft body roller bearing test device further includes a parallelism detection module, the parallelism detection module includes a measuring instrument and an instrument mounting assembly, the instrument mounting assembly includes an instrument seat and an adjusting bracket, the instrument seat is used for detachably connecting with the first instrument mounting position and the second instrument mounting position on the test tooling, the measuring instrument is connected with the instrument seat through the adjusting bracket, and the position and posture of the measuring instrument can be adjusted;

[0038] Before step S1, the following operations are also included:

[0039] S01. Parallelism detection:

[0040] When installing or replacing the sliding plate for the first time, connect the instrument seat with the first instrument mounting position on the test tooling, and adjust the measuring instrument so that the detection end of the measuring instrument contacts the side surface of the sliding plate; the dynamic test module works, the sliding plate translates a preset distance, and determine whether the parallelism of the side surface of the sliding plate relative to the sliding direction of the sliding plate is qualified according to the change amount of the measuring instrument reading; if the change amount of the measuring instrument reading exceeds the preset value, adjust the installation direction of the sliding plate, and repeat step S01;

[0041] When replacing the test tooling, connect the instrument seat with the second instrument mounting position on the sliding plate, and adjust the measuring instrument so that the detection end of the measuring instrument contacts the side surface of the adjusting seat; the dynamic test module works, the sliding plate translates a preset distance, and determine whether the angle of the side surface of the adjusting seat relative to the sliding direction of the sliding plate is qualified according to the change amount of the measuring instrument reading; if the change amount of the measuring instrument reading exceeds the preset value, adjust the installation direction of the adjusting seat through the angle adjusting mechanism, and repeat step S01.

[0042] In an ideal state, the installation direction of the sliding plate will be completely parallel to the sliding direction of the sliding plate. However, in practice, there is often a certain parallelism error between the installation direction of the sliding plate and the sliding direction of the sliding plate. Along with the sliding of the sliding plate, there will also be a certain offset in the contact position between the test bearing and the sliding plate. Correspondingly, there will be a certain uneven load on the sliding plate. By detecting the parallelism of the sliding plate, the degree of uneven load during the sliding of the sliding plate can be effectively reduced, thereby improving the reliability of the detection results.

[0043] Meanwhile, under ideal conditions, the running direction of the test bearing should be exactly parallel to the sliding direction of the sliding plate. When the end face of the test bearing is parallel to the side face of the adjusting seat, it can be equivalently understood that the side face of the adjusting seat is parallel to the sliding direction of the sliding plate. However, in practice, there is often a certain angular error between the installation direction of the adjusting seat and the sliding direction of the sliding plate. During the reciprocating rolling and sliding movement of the test bearing along the sliding plate, it is easy to cause jamming or eccentric wear of the test bearing. By detecting the angle of the adjusting seat relative to the sliding direction of the sliding plate, the running direction of the test bearing can be adjusted to a certain extent, effectively improving the jamming or eccentric wear problems during the operation of the test bearing, and thus improving the reliability of the test results.

[0044] Compared with the adjustment in step S2, the adjustment of the running direction of the test bearing in step S01 is an indirect measurement, which can limit the angular deviation of the running direction of the test bearing relative to the sliding direction of the sliding plate within a certain range. That is to say, the angle adjustment in step S01 is a preliminary adjustment or rough adjustment. In step S2, after installing the test bearing, according to the running situation of the test bearing, the angular deviation of the running direction of the test bearing relative to the sliding direction of the sliding plate can be finely adjusted. The two steps cooperate with each other to achieve a higher adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic structural diagram of the test device for the roller bearing of the aircraft body in this embodiment;

[0046] Figure 2 It is a schematic diagram of the cooperation of the loading module, the test tooling and the dynamic operation module in the test device for the roller bearing of the aircraft body in this embodiment;

[0047] Figure 3 It is a front view of the cooperation of the loading module, the test tooling and the dynamic operation module in the test device for the roller bearing of the aircraft body in this embodiment;

[0048] Figure 4 It is a side view of the cooperation of the loading module, the test tooling and the dynamic operation module in the test device for the roller bearing of the aircraft body in this embodiment;

[0049] Figure 5 It is a schematic diagram of the dynamic operation module in the test device for the roller bearing of the aircraft body in this embodiment;

[0050] Figure 6 It is a schematic diagram of the test tooling in the test device for the roller bearing of the aircraft body in this embodiment;

[0051] Figure 7 It is a top view of the test tooling in the test device for the roller bearing of the aircraft body in this embodiment;

[0052] Figure 8It is a cross-sectional view of the test tooling in the aircraft body roller bearing test device of this embodiment;

[0053] Figure 9 It is a schematic diagram of the cooperation of the loading module, test tooling, dynamic operation module and parallelism detection module in the aircraft body roller bearing test device of this embodiment;

[0054] Figure 10 It is a schematic diagram of the cooperation of the test tooling, dynamic operation module and parallelism detection module in the aircraft body roller bearing test device of this embodiment, where the measuring instrument is installed at the first instrument installation position of the test tooling;

[0055] Figure 11 It is a schematic diagram of the cooperation of the test tooling, dynamic operation module and parallelism detection module in the aircraft body roller bearing test device of this embodiment, where the measuring instrument is installed at the second instrument installation position of the sliding plate;

[0056] Figure 12 It is a schematic diagram of the state where the installation direction of the sliding plate in the aircraft body roller bearing test device of this embodiment is not parallel to the sliding direction of the sliding plate;

[0057] Figure 13 It is a schematic diagram of the state where there is a deviation in the installation angle of the test bearing relative to the sliding plate in the aircraft body roller bearing test device of this embodiment;

[0058] Figure 14 It is a schematic diagram of the state where the test bearing deviates from the center of the sliding plate in the horizontal direction in the aircraft body roller bearing test device of this embodiment. Detailed implementation manners

[0059] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention 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 only used to explain the present invention and are not used to limit the present invention.

[0060] Embodiment

[0061] As Figure 1 and Figure 9 shown, an aircraft body roller bearing test device includes a frame 1, a dynamic operation module 2, a loading module 3, a test tooling 4, a parallelism detection module 7 and a control module. The dynamic operation module 2 and the loading module 3 are arranged on the frame 1.

[0062] As Figures 2 - 5As shown, the dynamic operation module 2 includes a sliding plate 21 and a sliding driving assembly 22. The sliding driving assembly 22 is used to drive the sliding plate 21 to move translationally. Specifically, the sliding driving assembly 22 includes a translation driving unit and a sliding block. The sliding block is slidably connected to the frame 1. The translation driving unit is connected to the sliding block and is used to drive the sliding block to move. The sliding plate 21 is connected to the sliding block, and the sliding plate 21 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. The friction panel is detachably arranged 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 working condition requirements of the test bearing, friction panels with different friction coefficients can be set to improve the authenticity of the working condition simulation. At the same time, when the friction panel is worn, it can be replaced very conveniently.

[0063] As Figures 2 - 4 shown, the loading end of the loading module 3 is arranged facing the sliding plate 21. Specifically, the loading module 3 includes a loading bracket and a loading unit. The loading bracket includes two groups 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 groups of support guide rods 31.

[0064] The number of the loading modules 3 is two, and the two loading modules 3 are opposed to each other with respect to the sliding plate 21. The loads of the two groups of loading modules on the sliding plate are opposed up and down and offset, which can reduce the load on the sliding plate and reduce the deformation amount of the sliding plate. However, during loading, since it is difficult for the two loading modules to achieve completely synchronous loading speeds, that is, during the loading process, the loads applied by the two loading modules to the sliding plate will inevitably be inconsistent. The sliding plate 21 can float 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 to avoid excessive loading on the sliding plate in stages.

[0065] As Figure 6 and Figure 7 shown, a number of guiding units 411 are provided on the base 41. The guiding units 411 include hoop mechanisms. The support guide rods 31 are inserted into the hoop mechanisms, and a rolling friction pair with adjustable clearance is provided between the hoop mechanisms and the corresponding support guide rods 31.

[0066] The support guide rod 31 can support the loading module 3, and the cooperation between the guiding unit 411 and the support guide rod 31 can guide the feeding movement of the test tooling 4. By adjusting the gap between the hoop mechanism and the corresponding support guide rod, the guiding accuracy between the guiding unit and the support guide rod is effectively improved, the friction and wear between the guiding unit and the support guide rod are reduced, and at the same time, the lateral force on the loading module can be effectively avoided, improving the accuracy and service life of the loading module.

[0067] As Figures 6 - 8 shown, the test tooling 4 includes a base 41, an adjustment seat 42 and a bearing limiting assembly 43, and the base 41 is connected to the loading end of the loading module 3. The adjustment seat 42 is rotatably connected to the base 41, and an angle adjustment mechanism is provided between the adjustment seat 42 and the base 41. The rotation center line of the adjustment seat 42 is arranged along the loading direction of the loading module 3. The adjustment seat 42 is rotatably arranged with the base 41. By rotating the adjustment seat 42, the installation direction of the test bearing can be adjusted to ensure that the rotation direction of the test bearing is consistent with the sliding direction of the sliding plate 21, avoiding the jamming of the test bearing, the aggravated wear due to eccentric load, and ensuring the accuracy and reliability of the test results.

[0068] As Figures 6 - 8 shown, specifically, a core shaft is provided on the base 41, a limiting groove matching the core shaft is formed on the adjustment seat 42, and the adjustment seat 42 and the base 41 are rotationally limited by the core shaft and the limiting groove. A number of first connection holes are formed on the adjustment group, and the first connection holes extend arc-shaped around the axis of the limiting groove. An adjustment bolt is further included, and the adjustment bolt passes through the first connection hole and is threadedly connected to the base 41.

[0069] As Figures 6 - 8 shown, specifically, an adjustment arm 421 is provided on the side of the adjustment seat 42. The angle adjustment assembly includes adjustment execution units corresponding to the adjustment arms 421 one by one. The adjustment execution unit includes at least a pair of adjustment screws 44, and the adjustment screws 44 are threadedly connected to the base 41. One end of each adjustment screw 44 is connected with a ball, and the balls of each pair of adjustment screws 44 are arranged oppositely on both sides of the corresponding adjustment arm 421.

[0070] The oppositely arranged adjustment screws 44 can limit the adjustment arm 421, and thus realize the circumferential limit of the adjustment seat 42. At the same time, the circumferential angle adjustment of the adjustment seat 42 can be realized by operating the adjustment screws 44, with flexible operation and high adjustment accuracy.

[0071] As Figures 6 - 8As shown, the bearing limit assembly 43 includes a central shaft and two mounting legs. The two mounting legs are arranged oppositely, and a bearing mounting interval is formed between the two mounting legs. The central shaft is located between the two mounting legs. The mounting legs are connected to the adjustment seat 42, and the mounting legs can be adjusted relative to the adjustment seat 42 along the axial direction of the central shaft.

[0072] The mounting legs can be adjusted relative to the adjustment seat 42 along the axial direction of the central shaft. By adjusting the positions of the mounting legs, the positions of the mounting legs relative to the adjustment seat 42 and the relative positions between the two legs can be adjusted, so as to adjust the contact position between the test bearing and the sliding plate 21, avoid uneven loading of the sliding plate 21, and at the same time, the distance of the bearing mounting interval can also be adjusted to adapt to test bearings of different specifications.

[0073] Specifically, the adjustment seat 42 is provided with guide ribs and two groups of mounting base holes. The two groups of mounting base holes are arranged oppositely left and right relative to the guide ribs. The number of each group of mounting base holes is at least four, and the mounting base holes in each group are distributed along the extending direction of the guide ribs. The mounting legs are provided with guide grooves and two second connection holes. The two second connection holes are arranged oppositely left and right relative to the guide grooves. The second connection holes are strip-shaped and extend along the direction parallel to the guide grooves. An installation bolt is also included. In the connected state, the installation bolt passes through the second connection hole and is threadedly connected to the mounting base hole.

[0074] Selecting different mounting base holes for installation can roughly adjust the installation position of the bearing limit assembly 43, and fine-tune the installation position of the bearing limit assembly 43 by shifting the installation bolt relative to the second connection hole.

[0075] The control module is used to control the dynamic operation module 2 and the loading module 3 to work, and is used to monitor the operation states of each module. Specifically, the control module includes an uneven loading force detection unit, a torque detection unit, an online friction coefficient detection unit and an online wear detection unit.

[0076] The uneven loading force detection unit is used to detect the position state of the test bearing relative to the sliding plate 21. The uneven loading force detection unit corresponds to the adjusting screws one by one and is arranged between the adjusting screws and the corresponding balls. As a specific implementation manner, the uneven loading force detection unit is a pressure sensor. The acting force between the adjusting screw and the adjusting arm 421 can be detected through the uneven loading force detection unit. During the test, if there is a deviation in the installation angle of the test bearing relative to the sliding plate 21, that is, as Figure 13In the shown state, where the α angle is the deviation angle, the magnitudes of the forces exerted by the adjustment arm 421 on the adjustment screws on both sides will change, and there are differences in the changing trends of the forces on the corresponding adjustment screws on both sides. Based on the measurement results of the offloading force detection units in each pair of adjustment screws, the offloading direction and degree of the test bearing can be determined, providing a basis for adjusting the installation direction of the test bearing.

[0077] The torque detection unit is arranged between the sliding plate and the sliding block and is used to monitor the torque exerted on the sliding plate. During the test, if the test bearing deviates from the center of the sliding plate in the horizontal direction, that is, as Figure 14 shown in the figure, the sliding plate will be subjected to a bending moment under the load of the test bearing, resulting in uneven axial loading of the test bearing and affecting the reliability of the detection results. By detecting the torque of the sliding plate, the horizontal offset of the test bearing can be evaluated. When the torque of the sliding plate exceeds the preset value, by adjusting the position of the bearing limit component relative to the adjustment seat, the horizontal position of the test bearing relative to the sliding plate can be adjusted.

[0078] The online friction coefficient detection unit is arranged between the sliding block and the sliding plate and is used to monitor in real time the driving force of the translational movement of the sliding plate, indirectly evaluate the friction coefficient of the outer ring of the test bearing, and provide a basis for judging the results of the life test of the test bearing.

[0079] The online wear detection unit is arranged in the loading module and is used to monitor in real time the displacement of the piston rod of the loading oil cylinder in the loading module, indirectly evaluate the wear amount of the outer ring of the test bearing, and provide a basis for judging the results of the life test of the test bearing.

[0080] As Figures 9 - 11 shown in the figure, a first instrument mounting position is provided on the test fixture, and a second instrument mounting position is provided on the sliding plate. The parallelism detection module 7 includes a measuring instrument 73 and an instrument mounting assembly. The instrument mounting assembly includes an instrument seat 71 and an adjustment bracket 72. The instrument seat 71 is used for detachable connection with the first instrument mounting position and the second instrument mounting position on the test fixture. The measuring instrument 73 is connected to the instrument seat 71 through the adjustment bracket 72, and the position and attitude of the measuring instrument 73 can be adjusted.

[0081] In an ideal state, the installation direction of the sliding plate will be completely parallel to the sliding direction of the sliding plate. However, in practice, there is often a certain parallelism error between the installation direction of the sliding plate and the sliding direction of the sliding plate, that is, as Figure 12The state shown, where the β angle is the deviation angle. Along with the sliding of the sliding plate, there will also be a certain offset in the contact position between the test bearing and the sliding plate. Correspondingly, there will be a certain eccentric load on the sliding plate. By detecting the parallelism of the sliding plate, the degree of eccentric load during the sliding of the sliding plate can be effectively reduced, thereby improving the reliability of the test results.

[0082] Meanwhile, under ideal conditions, the running direction of the test bearing should be completely parallel to the sliding direction of the sliding plate. When the end face of the test bearing is parallel to the side face of the adjustment seat, it can be equivalently understood that the side face of the adjustment seat is parallel to the sliding direction of the sliding plate. However, in practice, there is often a certain angular error between the installation direction of the adjustment seat and the sliding direction of the sliding plate. During the reciprocating rolling and sliding movement of the test bearing along the sliding plate, it is easy to cause jamming or eccentric wear of the test bearing. By detecting the angle of the adjustment seat relative to the sliding direction of the sliding plate, the running direction of the test bearing can be adjusted to a certain extent, effectively improving the jamming or eccentric wear problem during the operation of the test bearing, and thus improving the reliability of the test results.

[0083] During the test, the test bearing 6 is installed in the bearing installation area and sleeved on the central shaft. The loading module 3 works, the outer ring of the test bearing 6 contacts the sliding plate 21, and a preset load is applied. The dynamic operation module 2 drives the sliding plate 21 to move translationally and drives the outer ring of the test bearing 6 to rotate. The outer ring of the test bearing 6 and the sliding plate 21 roll relative to each other, simulating the operating conditions of the roller bearing of the aircraft body. According to 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.

[0084] Furthermore, as Figure 1 shown, it further includes an environment simulation module 5. The environment simulation module 5 includes a test chamber, a temperature simulation component, and a medium simulation component. The test tooling 4 is placed in the test chamber, and part or all of the sliding plate 21 is placed in the test chamber. The temperature simulation component is used to adjust the temperature in the test chamber. The medium simulation component includes a medium spraying component, and the medium spraying component is used to spray the medium onto the test bearing in the test chamber. The angle and distance of the medium spraying component are adjustable.

[0085] Since the working environment of the roller bearing of the aircraft body is complex and changeable, there are high-temperature and low-temperature working conditions, and at the same time, there are various complex medium working conditions, such as salt spray working conditions, dust working conditions, etc. Through the environment simulation module 5, various working conditions can be simulated in the test chamber according to requirements, ensuring the authenticity of the operating conditions of the test bearing and the reliability of the test results.

[0086] An aircraft body roller bearing test method uses the aircraft body roller bearing test device as described above;

[0087] It at least includes the following steps:

[0088] S01. Parallelism Detection:

[0089] When the sliding plate is installed for the first time or replaced, as Figure 10 shown, connect the first instrument mounting position of the instrument seat 71 to the test tooling, and adjust the measuring instrument 73 so that the detection end of the measuring instrument 73 contacts the side surface of the sliding plate 21; the dynamic test module operates, and the sliding plate 21 translates a preset distance. Determine whether the parallelism of the side surface of the sliding plate relative to the sliding direction of the sliding plate is qualified according to the change amount of the reading of the measuring instrument 73; if the change amount of the reading of the measuring instrument 73 exceeds the preset value, adjust the installation direction of the sliding plate, and repeat step S01.

[0090] When the test tooling is replaced, as Figure 11 shown, connect the instrument seat to the second instrument mounting position of the sliding plate, and adjust the measuring instrument so that the detection end of the measuring instrument contacts the side surface of the adjustment seat; the dynamic test module operates, and the sliding plate translates a preset distance. Determine whether the angle of the side surface of the adjustment seat relative to the sliding direction of the sliding plate is qualified according to the change amount of the reading of the measuring instrument; if the change amount of the reading of the measuring instrument exceeds the preset value, adjust the installation direction of the adjustment seat through the angle adjustment mechanism, and repeat step S01.

[0091] S1. Installation: Install the test bearing on the test tooling 4; wherein, the test bearing is located within the bearing installation interval and sleeved on the central shaft.

[0092] S2. Adjustment: The loading module 3 operates, the test bearing contacts the sliding plate 21, and a preset load is applied; the dynamic operation module 2 runs for a trial, the sliding plate 21 translates, and drives the test bearing to rotate.

[0093] The off-axis force detection unit operates to detect the position state of the test bearing, and judge the offset direction and offset degree of the test bearing relative to the running direction of the sliding plate 21. The torque detection unit operates to monitor the torque received by the sliding plate. Judge the offset direction and offset degree of the test bearing relative to the sliding plate in the horizontal direction.

[0094] If the detection value of the off-axis force detection unit is greater than the preset value, the loading module unloads the load, and the operator adjusts the installation angle of the test bearing through the angle adjustment mechanism according to the detection result of the off-axis force detection unit, and re-performs operation S2.

[0095] If the detection value of the torque detection unit is greater than the preset value, the loading module unloads the load, and the operator adjusts the position of the bearing limit assembly relative to the adjustment seat according to the detection result of the torque detection unit, and re-performs operation S2.

[0096] S3. Operation: The dynamic test module operates, and the sliding plate 21 reciprocates horizontally for a preset time, while the test bearing moves synchronously. During the test, the friction coefficient on-line detection unit operates to monitor and record in real time the magnitude of the driving force applied by the sliding drive assembly 22, and the wear on-line detection unit operates to monitor and record in real time the load applied by the loading module.

[0097] S4. Result post-processing: Measure the change in the outer diameter of the test bearing outer ring, and determine whether the life of the test bearing meets the standard based on the change in the driving force applied by the sliding drive assembly 22, the magnitude of the load applied by the loading module, and the change in the outer diameter of the test bearing outer ring.

[0098] As a specific implementation manner, in step S2, during the process of the loading module applying the load, the two loading modules are loaded step by step in sequence until the loads applied by the two loading modules reach the preset value.

[0099] As a specific implementation manner, in step S3, according to the test requirements, the environment simulation module operates and simulates the preset temperature and medium environment.

[0100] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An aviation airframe roller bearing test device, characterized in that At least include: Frame; Dynamic operation module, the dynamic operation module is arranged on the frame; the dynamic operation module includes a sliding plate and a sliding drive assembly, and the sliding drive assembly is used to drive the sliding plate to move translationally; Loading module, the loading module is arranged on the frame, and the loading end of the loading module faces the sliding plate; Test tooling, the test tooling includes a base, an adjustment seat and a bearing limit assembly, the base is connected to the loading end of the loading module; the adjustment seat is rotatably connected to the base, and an angle adjustment mechanism is arranged between the adjustment seat and the base, and the rotation center line of the adjustment seat is arranged along the loading direction of the loading module; the bearing limit assembly includes a central shaft and two mounting legs, the two mounting legs are arranged oppositely, and a bearing mounting interval is formed between the two mounting legs; the central shaft is located between the two mounting legs; the mounting leg is connected to the adjustment seat, and the mounting leg can be adjusted relative to the adjustment seat along the axis direction of the central shaft; Control module, the control module is used to control the operation of the dynamic operation module and the loading module, and is used to detect the position state of the test bearing relative to the sliding plate.

2. The aviation airframe roller bearing test device according to claim 1, wherein: 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 the sliding plate can float relative to the sliding block in a direction perpendicular to the sliding plate; The sliding plate includes a main body and a friction panel, and the friction panel is detachably arranged on the side surface of the main body corresponding to the loading module.

3. The aviation airframe roller bearing test device according to claim 1, wherein: The loading module includes a loading bracket and a loading unit, the loading bracket includes two groups 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 groups of support guide rods; the number of the loading modules is two, and the two loading modules are arranged opposite to each other with respect to the sliding plate; A plurality of guiding units are arranged on the base, the guiding unit includes a hoop mechanism, the support guide rod is inserted into the hoop mechanism, and a rolling friction pair with adjustable clearance is arranged between the hoop mechanism and the corresponding support guide rod.

4. The aircraft body roller bearing test device according to claim 1, wherein: It also includes an environment simulation module, the environment simulation module includes a test chamber, a temperature simulation component and a medium simulation component, the test tooling is placed in the test chamber, and part or all of the sliding plate is placed in the test chamber; the temperature simulation component is used to adjust the temperature in the test chamber; the medium simulation component includes a medium spraying component, and the medium spraying component is used to spray the medium into the test chamber.

5. The aircraft body roller bearing test device according to any one of claims 1-4, characterized in that: An adjustment arm is arranged on the side surface of the adjustment seat; the angle adjustment component includes an adjustment execution unit corresponding to the adjustment arm one by one, the adjustment execution unit includes at least a pair of adjustment screws, and the adjustment screws are threadedly connected to the base; one end of the adjustment screw is connected with a ball; the balls of each pair of adjustment screws are arranged oppositely on both sides of the corresponding adjustment arm.

6. The aircraft body roller bearing test device according to claim 5, characterized in that: The control module includes a plurality of off-axis force detection units, the off-axis force detection units correspond to the adjustment screws one by one, and are arranged between the adjustment screws and the corresponding balls.

7. The aviation airframe roller bearing test device according to claim 5, characterized in that: A mandrel is provided on the base described above. A limiting groove matching the mandrel is provided on the adjustment seat. The adjustment seat and the base are rotationally limited by the mandrel and the limiting groove. A number of first connection holes are provided on the adjustment group. The first connection holes extend in an arc around the axis of the limiting groove. An adjustment bolt is further included. The adjustment bolt passes through the first connection hole and is threadedly connected to the base.

8. The aircraft body roller bearing test device according to claim 5, characterized in that: The adjustment seat is provided with guiding rib strips and two groups of mounting base holes. The two groups of mounting base holes are arranged opposite to each other left and right with respect to the guiding rib strips. The number of mounting base holes in each group is at least four. Each mounting base hole in each group is distributed along the extending direction of the guiding rib strips. The mounting leg is provided with a guiding groove and two second connection holes. The two second connection holes are arranged opposite to each other left and right with respect to the guiding groove. The second connection holes are strip-shaped and extend along a direction parallel to the guiding groove. An installation bolt is further included. In the connected state, the installation bolt passes through the second connection hole and is threadedly connected to the mounting base hole.

9. A test method for an aircraft body roller bearing, characterized in that: Adopt the aircraft body roller bearing test device according to any one of claims 1-8; At least include the following steps: S1. Installation: Install the test bearing on the test tooling. Among them, the test bearing is located within the bearing installation interval and is sleeved on the central shaft. S2. Adjustment: The loading module works. The test bearing contacts the sliding plate and a preset load is applied. The dynamic operation module runs a trial operation. The sliding plate moves translationally and drives the test bearing to rotate. The control module detects the position state of the test bearing and judges the offset direction and offset degree of the test bearing relative to the running direction of the sliding plate. If the offset degree of the test bearing is greater than the preset value, the operator adjusts the installation angle of the test bearing through the angle adjustment mechanism according to the detection result of the control module and repeats the operation of S2. S3. Operation: The dynamic test module works. The sliding plate reciprocates translationally for a preset time. The test bearing moves synchronously, and the magnitude of the driving force applied by the sliding drive assembly is recorded. S4. Result post-processing: Measure the change in the outer diameter of the outer ring of the test bearing, and judge whether the life of the test bearing meets the standard according to the change in the driving force applied by the sliding drive assembly and the change in the outer diameter of the outer ring of the test bearing.

10. The method for testing the roller bearing of an aircraft fuselage according to claim 9, characterized in that: The test tooling is provided with a first instrument installation position, and the sliding plate is provided with a second instrument installation position. The aircraft body roller bearing test device further includes a parallelism detection module. The parallelism detection module includes a measuring instrument and an instrument installation component. The instrument installation component includes an instrument seat and an adjustment bracket. The instrument seat is used for detachably connecting to the first instrument installation position and the second instrument installation position on the test tooling. The measuring instrument is connected to the instrument seat through the adjustment bracket, and the position and attitude of the measuring instrument can be adjusted. Before step S1, there is also the following operations: S01. Parallelism detection: When installing or replacing the sliding plate for the first time, connect the instrument seat to the first instrument installation position of the test tooling, and adjust the measuring instrument so that the detection end of the measuring instrument contacts the side surface of the sliding plate; the dynamic test module operates, the sliding plate translates a preset distance, and determine whether the parallelism of the side surface of the sliding plate relative to the sliding direction of the sliding plate is qualified according to the change amount of the indication of the measuring instrument; if the change amount of the indication of the measuring instrument exceeds the preset value, adjust the installation direction of the sliding plate, and repeat step S01; When replacing the test tooling, connect the instrument seat to the second instrument installation position of the sliding plate, and adjust the measuring instrument so that the detection end of the measuring instrument contacts the side surface of the adjustment seat; the dynamic test module operates, the sliding plate translates a preset distance, and determine whether the angle of the side surface of the adjustment seat relative to the sliding direction of the sliding plate is qualified according to the change amount of the indication of the measuring instrument; if the change amount of the indication of the measuring instrument exceeds the preset value, adjust the installation direction of the adjustment seat through the angle adjustment mechanism, and repeat step S01.

Images