Aviation airframe roller bearing test device and test method

Abstract

The invention relates to the field of bearings, and particularly discloses an aviation airframe roller bearing test device and test method. 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] 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 forklift mast roller bearing in the above application also operates in the condition of outer ring rotation, but the difference is that the forklift roller bearing operates in the condition of up and down rotation rather than left and right rotation, and the bearing load condition 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 aircraft body roller bearings. 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 test method, which can simulate the dynamic operation mode of the aircraft body roller bearing, and has the advantages of convenient installation and adjustment, realistic working condition simulation, and reliable detection results.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: an aircraft body roller bearing test device, comprising at least: frame; A dynamic operation module, wherein the dynamic operation module is arranged on the frame; the dynamic operation module comprises a slide board and a slide drive assembly, wherein the slide drive assembly is used to drive the slide board to move in translation; A loading module, wherein the loading module is arranged on the frame, and a loading end of the loading module is arranged toward the sliding board; A test fixture, the test fixture comprises 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 provided between the adjustment seat and the base, and the rotation centerline of the adjustment seat is arranged along the loading direction of the loading module; the bearing limit assembly comprises a central axis 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 axis 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 axis; A control module is used to control the operation of the dynamic operation module and the loading module, and to detect the position state of the test bearing relative to the sliding plate.

[0009] During the test, the test bearing is installed in the bearing installation area and sleeved on the central shaft. The loading module works, the outer ring of the test bearing contacts the slide board, and a preset load is applied. The dynamic operation module drives the slide board to translate and drives the outer ring of the test bearing to rotate. The outer ring of the test bearing and the slide board roll relative to each other, simulating the operating conditions of the roller bearing of an aircraft body. According to the wear amount of the outer ring of the test bearing after a specific running time, it can be determined whether the service life of the test bearing meets the standard.

[0010] 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 slide board, avoiding the test bearing from getting stuck and aggravating the wear due to eccentric loading, and ensuring the test results are accurate and reliable. The mounting legs can be adjusted along the axis direction of the central axis relative to the adjustment seat. By adjusting the position of the mounting legs, the position of the mounting 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 slide board to avoid eccentric loading of the slide board. At the same time, the distance of the bearing installation interval can also be adjusted to accommodate test bearings of different specifications.

[0011] Preferably, the sliding drive assembly comprises 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 board is connected to the sliding block, and the sliding board can float relative to the sliding block in a direction perpendicular to the sliding board; The floating slide can buffer the loading force to a certain extent. The slide comprises a main body and a friction panel, and the friction panel is detachably arranged on the side of the main body corresponding to the loading module.

[0012] 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 easily replaced.

[0013] Preferably, the loading module comprises a loading bracket and a loading unit, the loading bracket comprises two groups of supporting guide rods, and the loading unit is connected to the frame through the supporting guide rods; the sliding board is located between the two groups of supporting guide rods; the number of the loading modules is two, and the two loading modules are opposite to the sliding board; The base is provided with a plurality of guide units, the guide units include a clamping hoop mechanism, the support guide rod is inserted into the clamping hoop mechanism, and an adjustable gap is provided between the clamping hoop mechanism and the corresponding support guide rod.

[0014] The support guide rod can support the loading module, and the cooperation between the guide unit and the support guide rod can guide the feeding movement of the test fixture. By adjusting the gap between the clamp mechanism and the corresponding support guide rod, the guiding accuracy between the guide unit and the support guide rod can be effectively improved, the friction and wear between the guide unit and the support guide rod can be reduced, and the lateral force on the loading module can be effectively avoided, thereby improving the accuracy and life of the loading module.

[0015] Preferably, it further includes an environmental simulation module, which includes a test chamber, a temperature simulation component and a medium simulation component. The tester is installed in the test chamber, and the slide is partially or completely 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 spray component, and the medium spray component is used to spray the medium into the test chamber.

[0016] Since the working environment of aircraft body roller bearings is complex and changeable, there are high and low temperature conditions, as well as various complex medium conditions, such as salt spray conditions, dust conditions, etc. The environmental simulation module can simulate various conditions in the test chamber according to needs to ensure that the operating conditions of the test bearings are real and the test results are reliable.

[0017] Preferably, an adjustment arm is provided on the side of the adjustment seat; the angle adjustment assembly includes an adjustment execution unit corresponding to the adjustment arm one by one, the adjustment execution unit includes at least one pair of adjustment screws, and 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 to each other on both sides of the corresponding adjustment arm.

[0018] The adjusting screws arranged relatively 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, which is flexible to operate and has high adjustment accuracy.

[0019] Preferably, the control module comprises a plurality of eccentric load detection units, wherein the eccentric load detection units correspond to the adjusting screws one by one and are arranged between the adjusting screws and the corresponding balls.

[0020] The eccentric load detection unit can detect the force between the adjustment screw and the adjustment arm. During the test, if there is a deviation in the installation angle of the test bearing relative to the slide board, the force of the adjustment arm on the adjustment screws on both sides will change, and there will be differences in the force change trends of the corresponding adjustment screws on both sides. The measurement results of the eccentric load detection unit in each pair of adjustment screws can be used to determine the eccentric load direction and degree of the test bearing, providing a basis for adjusting the installation direction of the test bearing.

[0021] Preferably, the base is provided with a core shaft, the adjustment seat is provided with a limiting groove matching the core shaft, and the adjustment seat and the base are rotationally limited by the core shaft and the limiting groove; the adjustment group is provided with a plurality of first connecting holes, and the first connecting holes extend in an arc shape around the axis of the limiting groove; and also includes an adjusting bolt, which passes through the first connecting hole and is threadedly connected to the base.

[0022] Preferably, the adjustment seat is provided with guide ribs and two groups of mounting base holes, and the two groups of mounting base holes are opposite to each other on the left and right relative to the guide ribs; the number of the mounting base holes in each group is at least four, and the mounting base holes in each group are distributed along the extension direction of the guide ribs; the mounting legs are provided with guide grooves and two second connecting holes, and the two second connecting holes are opposite to each other on the left and right relative to the guide grooves, and the second connecting holes are long strips and extend in a direction parallel to the guide grooves; and also include mounting bolts, which, in the connected state, pass through the second connecting holes and are threadedly connected to the mounting base holes.

[0023] The installation position of the bearing limit assembly can be roughly adjusted by selecting different installation base holes for installation, and the installation position of the bearing limit assembly can be finely adjusted by shifting the installation bolt relative to the second connecting hole.

[0024] An aircraft body roller bearing test method, using the aircraft body roller bearing test device as described above; At least the following steps are included: S1. Installation: Install the test bearing on the test fixture; wherein the test bearing is located in the bearing installation area and is sleeved on the central shaft; S2. Adjustment: The loading module works, the test bearing contacts the slide board, and a preset load is applied; the dynamic operation module is tested, the slide board moves in translation, and drives the test bearing to rotate; the control module detects the position state of the test bearing, and determines the offset direction and offset degree of the test bearing relative to the running direction of the slide board; 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 performs S2 operation again; S3. Operation: The dynamic test module works, the slide plate reciprocates and translates for a preset time, the test bearing moves synchronously, and the driving force applied by the slide drive assembly is recorded; 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 the driving force applied by the sliding drive assembly and the change in the outer diameter of the outer ring of the test bearing.

[0025] Preferably, the test fixture is provided with a first instrument installation position, and the slide board is provided with a second instrument installation position; the aircraft body roller bearing test device further comprises a parallelism detection module, the parallelism detection module comprises a measuring instrument and an instrument installation assembly, the instrument installation assembly comprises an instrument seat and an adjustment bracket, the instrument seat is used to be detachably connected with the first instrument installation position and the second instrument installation position on the test fixture, the measuring instrument is connected to the instrument seat through the adjustment bracket, and the position and posture of the measuring instrument can be adjusted; Before step S1, the following operations are also included: S01. Parallelism detection: When installing or replacing the slide board for the first time, connect the instrument seat to the first instrument installation position of the test fixture, adjust the measuring instrument so that the detection end of the measuring instrument contacts the side of the slide board; the dynamic test module works, the slide board is translated by a preset distance, and the parallelism of the side of the slide board relative to the sliding direction of the slide board is determined to be qualified according to the change in the number indicated by the measuring instrument; if the change in the number indicated by the measuring instrument exceeds the preset value, adjust the installation direction of the slide board, and repeat step S01; When replacing the test fixture, connect the instrument seat to the second instrument installation position of the slide board, adjust the measuring instrument so that the detection end of the measuring instrument contacts the side of the adjustment seat; the dynamic test module works, the slide board translates a preset distance, and determines whether the angle of the side of the adjustment seat relative to the sliding direction of the slide board is qualified according to the change in the number indicated by the measuring instrument; if the change in the number indicated by the measuring instrument exceeds the preset value, adjust the installation direction of the adjustment seat through the angle adjustment mechanism, and repeat step S01.

[0026] Ideally, the installation direction of the slide board will be completely parallel to the sliding direction of the slide board. However, in practice, there is often a certain parallelism error between the installation direction of the slide board and the sliding direction of the slide board. As the slide board slides, the contact position between the test bearing and the slide board will also be offset to a certain extent. Correspondingly, the slide board will have a certain amount of eccentric load. By testing the parallelism of the slide board, the degree of eccentric load during the sliding process of the slide board can be effectively reduced, thereby improving the reliability of the test results.

[0027] At the same time, under ideal conditions, the running direction of the test bearing should be completely parallel to the sliding direction of the slide board. 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 slide board. However, in practice, there is often a certain angle error between the installation direction of the adjustment seat and the sliding direction of the slide board. During the reciprocating rolling motion of the test bearing along the slide board, it is easy to cause the test bearing to get stuck or wear eccentrically. By detecting the angle of the adjustment seat relative to the sliding direction of the slide board, the running direction of the test bearing can be adjusted to a certain extent, effectively improving the problem of sticking or wearing of the test bearing during operation, thereby improving the reliability of the test results.

[0028] Compared with the adjustment in step S2, the test bearing running direction adjustment in step S01 is an indirect measurement, which can limit the angle deviation of the test bearing running direction relative to the sliding direction of the slide board within a certain range, that is, the angle adjustment in step S01 is a preliminary adjustment or a rough adjustment. In step S2, after the test bearing is installed, the angle deviation of the test bearing running direction relative to the sliding direction of the slide board can be finely adjusted according to the running condition of the test bearing. The two steps cooperate with each other to achieve higher adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the aircraft body roller bearing test device of this embodiment; Figure 2 It is a schematic diagram of the coordination of the loading module, the test fixture and the dynamic operation module in the aircraft body roller bearing test device of this embodiment; Figure 3 This is a front view of the coordination of the loading module, the test fixture and the dynamic operation module in the aircraft body roller bearing test device of this embodiment; Figure 4 It is a side view of the coordination of the loading module, the test fixture and the dynamic operation module in the aircraft body roller bearing test device of this embodiment; Figure 5 It is a schematic diagram of a dynamic operation module in the aircraft body roller bearing test device of this embodiment; Figure 6 It is a schematic diagram of the test fixture in the aircraft body roller bearing test device of this embodiment; Figure 7 A top view of the test fixture in the aircraft body roller bearing test device of this embodiment; Figure 8 is a cross-sectional view of a test fixture in the aircraft body roller bearing test device of this embodiment; Fig. 9 It is a schematic diagram of the coordination of the loading module, the test fixture, the dynamic operation module and the parallelism detection module in the aircraft body roller bearing test device of this embodiment; Fig.10 It is a schematic diagram of the cooperation between the test fixture, the dynamic operation module and the parallelism detection module in the aircraft body roller bearing test device of this embodiment, wherein the measuring instrument is installed in the first instrument installation position of the test fixture; Fig.11 It is a schematic diagram of the cooperation between the test fixture, the dynamic operation module and the parallelism detection module in the aircraft body roller bearing test device of this embodiment, wherein the measuring instrument is installed at the second instrument installation position of the sliding board; Fig.12 It is a schematic diagram of a state in which the installation direction of the slide board in the aircraft body roller bearing test device of this embodiment is not parallel to the slide direction of the slide board; Fig.13 It is a schematic diagram of a state in which the installation angle of the test bearing relative to the slide board in the aircraft body roller bearing test device of this embodiment is deviated; Fig.14 It is a schematic diagram of the state in which the test bearing in the aircraft body roller bearing test device of this embodiment is offset from the center of the sliding board in the horizontal direction. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] Example

[0032] like Figure 1 and Fig. 9 As shown, an aircraft body roller bearing test device includes a frame 1, a dynamic operation module 2, a loading module 3, a test fixture 4, a parallelism detection module 7 and a control module, wherein the dynamic operation module 2 and the loading module 3 are arranged on the frame 1.

[0033] like Figure 2-Figure 5 As shown, the dynamic operation module 2 includes a slide plate 21 and a slide drive assembly 22, and the slide drive assembly 22 is used to drive the slide plate 21 to move in translation. Specifically, the slide drive assembly 22 includes a translation drive unit and a slide block, the slide block is slidably connected to the frame 1, and the translation drive unit is connected to the slide block and is used to drive the slide block to move; the slide plate 21 is connected to the slide block, and the slide plate 21 can float relative to the slide block in a direction perpendicular to the slide plate 21. The slide plate 21 includes a main body and a friction panel, and the friction panel can be detachably arranged on the side corresponding to the main body and the loading module. The floating slide 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 also be easily replaced.

[0034] like Figure 2-Figure 4 As shown, the loading end of the loading module 3 is arranged toward the slide board 21. Specifically, the loading module 3 includes a loading bracket and a loading unit. The loading bracket includes two groups of supporting guide rods 31. The loading unit is connected to the frame 1 through the supporting guide rods 31. The slide board 21 is located between the two groups of supporting guide rods 31.

[0035] There are two loading modules 3, and the two loading modules 3 are opposite to each other relative to the slide board 21. The two groups of loading modules are opposite to each other and offset the loads on the slide board, which can reduce the load on the slide board and reduce the deformation of the slide board. However, during loading, it is difficult for the two loading modules to achieve complete synchronization of the loading speeds, that is, during the loading process, the loads applied to the slide board by the two loading modules will inevitably be inconsistent. The slide board 21 can float relative to the slide block in a direction perpendicular to the slide board 21. When the loading speed on one side is faster, the slide board can be buffered by floating to avoid excessive load on the slide board at certain stages.

[0036] like Figure 6 and Figure 7 As shown, a plurality of guide units 411 are provided on the base 41 , and the guide units 411 include a clamping mechanism, into which the support guide rod 31 is inserted, and a rolling friction pair with an adjustable gap is provided between the clamping mechanism and the corresponding support guide rod 31 .

[0037] The support guide rod 31 can support the loading module 3, and the cooperation between the guide unit 411 and the support guide rod 31 can guide the feeding movement of the test fixture 4. By adjusting the gap between the clamp 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 life of the loading module.

[0038] like Figure 6-Figure 8 As shown, the test fixture 4 includes a base 41, an adjustment seat 42 and a bearing stop 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, and 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, and the installation direction of the test bearing can be adjusted by rotating the adjustment seat 42 to ensure that the rotation direction of the test bearing is consistent with the sliding direction of the slide plate 21, so as to avoid causing the test bearing to get stuck, and to aggravate the wear due to the eccentric load, so as to ensure that the test results are accurate and reliable.

[0039] like Figure 6-Figure 8 As shown, specifically, the base 41 is provided with a mandrel, the adjustment seat 42 is provided with a limiting groove matching the mandrel, and the adjustment seat 42 and the base 41 are rotationally limited by the mandrel and the limiting groove. The adjustment group is provided with a plurality of first connecting holes, and the first connecting holes extend in an arc shape 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 41.

[0040] like Figure 6-Figure 8 As shown, specifically, an adjustment arm 421 is provided on the side of the adjustment seat 42. The angle adjustment assembly includes an adjustment execution unit corresponding to the adjustment arm 421, and the adjustment execution unit includes at least one pair of adjustment screws 44, and the adjustment screws 44 are threadedly connected to the base 41. One end of the adjustment screw 44 is connected to a ball, and the balls of each pair of adjustment screws 44 are arranged opposite to each other on both sides of the corresponding adjustment arm 421.

[0041] The adjusting screws 44 arranged relatively to each other can limit the adjusting arm 421, thereby realizing the circumferential limit of the adjusting seat 42. At the same time, the circumferential angle adjustment of the adjusting seat 42 can be realized by operating the adjusting screws 44, which is flexible to operate and has high adjustment accuracy.

[0042] like Figure 6-Figure 8 As shown, the bearing limit assembly 43 includes a central axis and two mounting legs, the two mounting legs are arranged opposite to each other, a bearing mounting area is formed between the two mounting legs, and the central axis 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 axis.

[0043] The mounting legs can be adjusted relative to the adjustment seat 42 along the axial direction of the center axis. By adjusting the position of the mounting legs, the position of the mounting legs relative to the adjustment 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 board 21 to avoid unbalanced loading of the slide board 21. At the same time, the distance of the bearing mounting interval can also be adjusted to accommodate test bearings of different specifications.

[0044] Specifically, the adjustment seat 42 is provided with a guide rib and two groups of mounting base holes, and the two groups of mounting base holes are opposite to each other with respect to the guide rib. The number of the mounting base holes in each group is at least four, and the mounting base holes in each group are distributed along the extension direction of the guide rib. The mounting leg is provided with a guide groove and two second connection holes, and the two second connection holes are opposite to each other with respect to the guide groove. The second connection holes are in the shape of a long strip and extend in a direction parallel to the guide groove. It also includes a mounting bolt, and in the connected state, the mounting bolt passes through the second connection hole and is threadedly connected to the mounting base hole.

[0045] The installation position of the bearing limit assembly 43 can be roughly adjusted by selecting different installation base holes for installation, and the installation position of the bearing limit assembly 43 can be finely adjusted by shifting the installation bolt relative to the second connection hole.

[0046] The control module is used to control the operation of the dynamic operation module 2 and the loading module 3, and to monitor the operation status of each module. Specifically, the control module includes an eccentric force detection unit, a torque detection unit, an online friction factor detection unit, and an online wear detection unit.

[0047] The eccentric force detection unit is used to detect the position of the test bearing relative to the slide board 21. The eccentric force detection unit corresponds to the adjustment screw one by one and is arranged between the adjustment screw and the corresponding ball. As a specific embodiment, the eccentric force detection unit is a pressure sensor. The eccentric force detection unit can detect the force between the adjustment screw and the adjustment arm 421. During the test, if there is a deviation in the installation angle of the test bearing relative to the slide board 21, that is, Fig.13 In the state shown, the angle α is the deviation angle, then the force exerted by the adjusting arm 421 on the adjusting screws on both sides will change, and there will be differences in the force change trends of the corresponding adjusting screws on both sides. The measurement results of the eccentric load detection unit in each pair of adjusting screws can be used to determine the eccentric load direction and degree of the test bearing, thereby providing a basis for adjusting the installation direction of the test bearing.

[0048] The torque detection unit is arranged between the slide board and the slide block to monitor the torque applied to the slide board. Fig.14 In the state shown, the slide board will be subjected to bending moment under the load of the test bearing, causing uneven axial load on the test bearing, affecting the reliability of the test result. By testing the torque of the slide board, the horizontal offset of the test bearing can be evaluated. When the torque of the slide board exceeds the preset value, the horizontal position of the test bearing relative to the slide board can be adjusted by adjusting the position of the bearing limit assembly relative to the adjustment seat.

[0049] The friction factor online detection unit is arranged between the sliding block and the sliding board, and is used to monitor the driving force of the sliding board translational motion in real time, and indirectly evaluate the friction factor of the outer ring of the test bearing, and provide a basis for judging the result of the test bearing life test.

[0050] The wear online detection unit is arranged in the loading module, and is used to monitor the displacement of the loading cylinder piston rod in the loading module in real time, and indirectly evaluate the wear amount of the test bearing outer ring, and provide a basis for judging the result of the test bearing life test.

[0051] like Figure 9-11 As shown, the test fixture is provided with a first instrument installation position, and the slide board is provided with a second instrument installation position. The parallelism detection module 7 includes a measuring instrument 73 and an instrument installation assembly, and the instrument installation assembly includes an instrument seat 71 and an adjustment bracket 72. The instrument seat 71 is used to be detachably connected to the first instrument installation position and the second instrument installation position on the test fixture, and the measuring instrument 73 is connected to the instrument seat 71 through the adjustment bracket 72, and the position and posture of the measuring instrument 73 can be adjusted.

[0052] Ideally, the installation direction of the slide board will be completely parallel to the sliding direction of the slide board. However, in practice, there is often a certain degree of parallelism between the installation direction of the slide board and the sliding direction of the slide board. Fig.12 The state shown in the figure is that the angle β is the deviation angle. As the slide board slides, the contact position between the test bearing and the slide board will also be offset to a certain extent. Correspondingly, the slide board will have a certain amount of eccentric load. By testing the parallelism of the slide board, the degree of eccentric load during the slide board sliding process can be effectively reduced, thereby improving the reliability of the test results.

[0053] At the same time, under ideal conditions, the running direction of the test bearing should be completely parallel to the sliding direction of the slide board. 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 slide board. However, in practice, there is often a certain angle error between the installation direction of the adjustment seat and the sliding direction of the slide board. During the reciprocating rolling motion of the test bearing along the slide board, it is easy to cause the test bearing to get stuck or wear eccentrically. By detecting the angle of the adjustment seat relative to the sliding direction of the slide board, the running direction of the test bearing can be adjusted to a certain extent, effectively improving the problem of sticking or wearing of the test bearing during operation, thereby improving the reliability of the test results.

[0054] During the test, the test bearing 6 is installed in the bearing installation area and sleeved on the central axis. The loading module 3 works, the outer ring of the test bearing 6 contacts the sliding board 21, and a preset load is applied. The dynamic operation module 2 drives the sliding board 21 to translate and drives the outer ring of the test bearing 6 to rotate. The outer ring of the test bearing 6 and the sliding board 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.

[0055] Further, such as Figure 1 As shown, it also includes an environmental simulation module 5, which includes a test box, a temperature simulation component and a medium simulation component. The test fixture 4 is placed in the test box, and the slide plate 21 is partially or completely placed in the test box. The temperature simulation component is used to adjust the temperature in the test box. The medium simulation component includes a medium spray component, which is used to spray the medium to the test bearing in the test box, and the angle and distance of the medium spray component are adjustable.

[0056] Since the working environment of the aircraft body roller bearing is complex and changeable, there are high temperature and low temperature conditions, as well as various complex medium conditions, such as salt spray conditions, dust conditions, etc., the environmental simulation module 5 can simulate various conditions in the test box according to the needs to ensure that the operating conditions of the test bearing are real and the test results are reliable.

[0057] An aircraft body roller bearing test method, using the aircraft body roller bearing test device as described above; At least the following steps are included: S01. Parallelism detection: When installing the skid plate for the first time or replacing it, Fig.10 As shown, the first instrument mounting position of the instrument holder 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 slide board 21; the dynamic test module works, the slide board 21 is translated by a preset distance, and the parallelism of the side of the slide board relative to the sliding direction of the slide board is determined to be qualified 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 slide board is adjusted, and step S01 is repeated.

[0058] When replacing the test tooling, Fig.11 As shown, the instrument seat is connected to the second instrument installation position of the slide board, and the measuring instrument is adjusted so that the detection end of the measuring instrument contacts the side of the adjustment seat; the dynamic test module works, the slide board translates a preset distance, and the angle of the side of the adjustment seat relative to the sliding direction of the slide board is determined to be qualified according to the change in the number indicated by the measuring instrument; if the change in the number indicated by the measuring instrument exceeds the preset value, the installation direction of the adjustment seat is adjusted by the angle adjustment mechanism, and step S01 is repeated.

[0059] S1. Installation: Install the test bearing on the test fixture 4; wherein the test bearing is located in the bearing installation area and is sleeved on the central shaft.

[0060] S2. Adjustment: The loading module 3 works, the test bearing contacts the slide plate 21, and a preset load is applied; the dynamic operation module 2 is tested, the slide plate 21 moves in translation, and drives the test bearing to rotate.

[0061] The eccentric force detection unit works to detect the position state of the test bearing and determine the offset direction and offset degree of the test bearing relative to the running direction of the slide board 21. The torque detection unit works to monitor the torque applied to the slide board and determine the offset direction and offset degree of the test bearing relative to the slide board in the horizontal direction.

[0062] If the detection value of the eccentric load detection unit is greater than the preset value, the loading module removes 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 eccentric load detection unit, and performs S2 operation again.

[0063] If the detection value of the torque detection unit is greater than the preset value, the loading module removes 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 performs S2 operation again.

[0064] S3. Operation: The dynamic test module works, the slide plate 21 reciprocates and translates for a preset time, and the test bearing moves synchronously. During the test, the friction factor online detection unit works to monitor and record the driving force applied by the slide drive assembly 22 in real time, and the wear online detection unit works to monitor and record the load applied by the loading module in real time.

[0065] 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 requirements based on the change in the 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.

[0066] As a specific implementation, 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 a preset value.

[0067] As a specific implementation, in step S3, according to the test requirements, the environment simulation module works and simulates the preset temperature and medium environment.

[0068] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An aircraft body roller bearing test device, characterized in that: At least: frame; A dynamic operation module, wherein the dynamic operation module is arranged on the frame; the dynamic operation module comprises a slide board and a slide drive assembly, wherein the slide drive assembly is used to drive the slide board to move in translation; A loading module, wherein the loading module is arranged on the frame, and a loading end of the loading module is arranged toward the sliding board; A test fixture, the test fixture comprises 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 provided between the adjustment seat and the base, and the rotation centerline of the adjustment seat is arranged along the loading direction of the loading module; the bearing limit assembly comprises a central axis 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 axis 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 axis; A control module is used to control the operation of the dynamic operation module and the loading module, and to detect the position state of the test bearing relative to the sliding plate.

2. The aircraft body roller bearing test device according to claim 1, characterized in that: The sliding drive assembly comprises a translation drive unit and a sliding block, wherein the sliding block is slidably connected to the frame, and the translation drive unit is connected to the sliding block and is used to drive the sliding block to move; the sliding board is connected to the sliding block, and the sliding board can float relative to the sliding block in a direction perpendicular to the sliding board; The slide board comprises a main body and a friction panel, and the friction panel is detachably arranged on the side of the main body corresponding to the loading module.

3. The aircraft body roller bearing test device according to claim 1, characterized in that: 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 board is located between the two groups of support guide rods; the number of the loading modules is two, and the two loading modules are opposite to the sliding board; The base is provided with a plurality of guide units, the guide units include a clamping hoop mechanism, the support guide rod is inserted into the clamping hoop mechanism, and a rolling friction pair with adjustable gap is provided between the clamping hoop mechanism and the corresponding support guide rod.

4. The aircraft body roller bearing test device according to claim 1, characterized in that: It also includes an environmental simulation module, which includes a test box, a temperature simulation component and a medium simulation component. The tester is installed in the test box, and the slide is partially or completely placed in the test box; the temperature simulation component is used to adjust the temperature in the test box; the medium simulation component includes a medium spray component, and the medium spray component is used to spray the medium into the test box.

5. The aircraft body roller bearing test device according to any one of claims 1 to 4, characterized in that: An adjustment arm is provided on the side of the adjustment seat; the angle adjustment assembly includes an adjustment execution unit corresponding to the adjustment arm one by one, and the adjustment execution unit includes at least one pair of adjustment screws, and 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 to each other 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 comprises a plurality of eccentric load detection units, each of which corresponds to an adjusting screw one by one and is arranged between the adjusting screw and the corresponding ball.

7. The aircraft body roller bearing test device according to claim 5, characterized in that: The base is provided with a core shaft, the adjustment seat is provided with a limiting groove matching the core shaft, and the adjustment seat and the base are rotationally limited by the core shaft and the limiting groove; the adjustment group is provided with a plurality of first connecting holes, and the first connecting holes extend in an arc shape around the axis of the limiting groove; and also includes an adjusting bolt, which passes through the first connecting 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 a guide rib and two groups of mounting base holes, and the two groups of mounting base holes are opposite to each other on the left and right relative to the guide rib; the number of the mounting base holes in each group is at least four, and the mounting base holes in each group are distributed along the extension direction of the guide rib; the mounting leg is provided with a guide groove and two second connecting holes, and the two second connecting holes are opposite to each other on the left and right relative to the guide groove, and the second connecting holes are long strips and extend in a direction parallel to the guide groove; and it also includes a mounting bolt, which, in the connected state, passes through the second connecting hole and is threadedly connected to the mounting base hole.

9. A method for testing an aircraft roller bearing, characterized in that: Using the aircraft body roller bearing test device as described in any one of claims 1 to 8; At least the following steps are included: S1. Installation: Install the test bearing on the test fixture; wherein the test bearing is located in the bearing installation area and is sleeved on the central shaft; S2. Adjustment: The loading module works, the test bearing contacts the slide board, and a preset load is applied; the dynamic operation module is tested, the slide board moves in translation, and drives the test bearing to rotate; the control module detects the position state of the test bearing, and determines the offset direction and offset degree of the test bearing relative to the running direction of the slide board; 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 performs S2 operation again; S3. Operation: The dynamic test module works, the slide plate reciprocates and translates for a preset time, the test bearing moves synchronously, and the driving force applied by the slide drive assembly is recorded; 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 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 aircraft body roller bearing test method according to claim 9, characterized in that: The test fixture is provided with a first instrument installation position, and the slide board is provided with a second instrument installation position; the aircraft body roller bearing test device also includes a parallelism detection module, the parallelism detection module includes a measuring instrument and an instrument installation assembly, the instrument installation assembly includes an instrument seat and an adjustment bracket, the instrument seat is used to be detachably connected to the first instrument installation position and the second instrument installation position on the test fixture, the measuring instrument is connected to the instrument seat through the adjustment bracket, and the position and posture of the measuring instrument can be adjusted; Before step S1 The following operations are included: S01. Parallelism detection: When installing or replacing the slide board for the first time, connect the instrument seat to the first instrument installation position of the test fixture, adjust the measuring instrument so that the detection end of the measuring instrument contacts the side of the slide board; the dynamic test module works, the slide board is translated by a preset distance, and the parallelism of the side of the slide board relative to the sliding direction of the slide board is determined to be qualified according to the change in the number indicated by the measuring instrument; if the change in the number indicated by the measuring instrument exceeds the preset value, adjust the installation direction of the slide board, and repeat step S01; When replacing the test fixture, connect the instrument seat to the second instrument installation position of the slide board, adjust the measuring instrument so that the detection end of the measuring instrument contacts the side of the adjustment seat; the dynamic test module works, the slide board translates a preset distance, and determines whether the angle of the side of the adjustment seat relative to the sliding direction of the slide board is qualified according to the change in the number indicated by the measuring instrument; if the change in the number indicated by the measuring instrument exceeds the preset value, adjust the installation direction of the adjustment seat through the angle adjustment mechanism, and repeat step S01.

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