Aero-engine bearing testing machine and testing method thereof

Abstract

An aircraft bearing testing machine comprises a test bench, the test bench is provided with an axial load loading machine, a test bearing installation mechanism, a driving main shaft installation mechanism and a radial load loading machine, the aircraft bearing testing machine further comprises a moving mechanism, and the moving mechanism comprises a transmission part, a bearing plate movably arranged on the transmission part and an axial driving part. The radial load loading machine is arranged on the bearing plate and is driven by the axial driving part to drive the bearing plate to move on the transmission part, a test window is arranged on the test bearing mounting mechanism, and the length of the test window corresponds to the moving distance of the bearing plate. The device has the beneficial effects that the bearing plate is driven by the axial driving part to move on the transmission part so as to drive the radial load loading machine to move to the corresponding position of the tested bearing, so that the bearings with different widths can be placed in the test bearing mounting mechanism to be detected.

Description

Technical Field

[0001] The invention relates to a testing machine and a testing method thereof, in particular to an aero-engine bearing testing machine and a testing method thereof. Background Art

[0002] The aircraft engine bearing tester is a high-precision device specially designed to simulate and test the performance and durability of aircraft engine bearings under various flight conditions. The core part of the tester is the radial load loading system, which accurately applies static and dynamic loads through hydraulic or pneumatic mechanisms to simulate the stress conditions during takeoff, flight and landing. During the test, the force sensor monitors the force acting on the bearing in real time to ensure the accuracy of the test. In addition, the equipped temperature control system is able to simulate extreme thermal environments and evaluate the heat resistance of bearing materials. The data acquisition system records key performance parameters such as friction torque and vibration, providing engineers with a detailed analysis of bearing performance. The entire test process is carried out under strict safety protection measures to ensure the safety of operation and the reliability of data.

[0003] Chinese patent document CN117030257B discloses an aerospace bearing testing machine, which, when in use, installs the bearing to be tested between the transmission shaft and the bearing frame, connects the monitoring unit and the loading unit on the surface of the test bench to the bearing to be tested, monitors the rotation speed, temperature, vibration and other information of the bearing to be tested during the test through the existing monitoring unit, and simulates the actual use environment of the aerospace bearing by loading the bearing unidirectionally when testing the bearing, thereby evaluating the performance and durability of the bearing in the actual use environment.

[0004] However, the above scheme has the following shortcomings: when testing the radial load of the bearing, the radial load needs to be applied to the shaft ring. Since the bearings to be tested have different widths, the above scheme cannot be adapted to the testing of bearings of different widths. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an aircraft engine bearing testing machine and a testing method thereof that can perform testing at more positions.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: an aircraft engine bearing testing machine, including a test bench, on which an axial load loader, a test bearing mounting mechanism, a drive spindle mounting mechanism and a radial load loader are arranged. The axial load loader, the test bearing mounting mechanism and the drive spindle mounting mechanism are distributed in the same straight line, and the axial load loader and the drive spindle mounting mechanism are located on both sides of the test bearing mounting mechanism. The radial load loader is arranged opposite to the test bearing mounting mechanism. Both the radial load loader and the bearing load loader can move toward the direction of the test bearing. The moving mechanism also includes a transmission member, a bearing plate movably arranged on the transmission member and an axial driving member. The radial load loader is arranged on the bearing plate and is driven by the axial driving member to drive the bearing plate to move on the transmission member. A test window is arranged on the test bearing mounting mechanism, and the length of the test window is set corresponding to the moving distance of the bearing plate.

[0007] The beneficial effect of the present invention is that the axial driving member drives the bearing plate to move on the transmission member to drive the radial load loader to move to the corresponding position of the tested bearing, so that bearings of different widths can be placed in the test bearing installation mechanism for testing. Furthermore, the axial load loader, the test bearing installation mechanism and the drive spindle installation mechanism are distributed in the same straight line and the axial load loader and the drive spindle installation mechanism are located on both sides of the test bearing installation mechanism, which can better axially position and fix the tested bearing, and prevent the tested bearing from being offset during the detection process to affect the detection effect.

[0008] Furthermore, it also includes a control system, wherein monitoring ports are provided on both sides of the bearing plate, and each monitoring port is provided with a photoelectric sensor connected to the control system and used to measure the unilateral limit of the bearing. After receiving the data from the photoelectric sensor, the control system measures the shaft ring width and controls the axial drive member to move to a suitable position.

[0009] The two monitoring ports are both set at the farthest ends of the bearing plate, and the detection position of the photoelectric sensor is aligned with the monitoring port, so that when the photoelectric sensor detects the boundary of one side of the bearing shaft ring, the signal is transmitted to the control system in time. After the photoelectric sensors on both sides complete the detection, the control system calculates the width of the bearing shaft ring and controls the axial drive member to drive the bearing plate to move to the corresponding position. As a preferred setting, the radial load loader is set at the center of the bearing plate to facilitate moving into position; as another preferred setting, a scale mark is correspondingly set outside the bearing plate, and the photoelectric sensor will pause for a while when it moves to the single-side boundary to facilitate the operator to read the reading. After moving into position, the operator can also manually check the moving position through the scale mark.

[0010] Furthermore, a transmission tooth is provided at the front end of the axial driving member, and one end of the transmission member facing the transmission tooth is meshed with the transmission tooth, and one end of the transmission member facing the supporting plate is provided with a card interface for the supporting plate to be connected.

[0011] The above arrangement can form a stable connection and transmission relationship between the axial drive member and the transmission member, can effectively prevent the axial drive member from idling, and ensure the accuracy of the moving position of the radial load loader. In addition, the arrangement of the card interface can also facilitate the maintenance of the radial load loader or the components on the carrier plate when a fault occurs.

[0012] Furthermore, the test bearing installation mechanism comprises symmetrically arranged and openable positioning shells, wherein one of the positioning shells is provided with a locking piece, and the other positioning shell is provided with a locking hole matching the locking piece.

[0013] The above arrangement can facilitate the installation of the bearing by opening the positioning shell when the bearing is installed in the test bearing installation mechanism. After the bearing is installed, the positioning shell is closed and the two positioning shells are fixed by matching the locking member and the locking hole.

[0014] Furthermore, the locking hole and the locking piece are correspondingly arranged on two sides of the positioning shell, and the locking hole and the locking piece are fixed by screwing.

[0015] The screw connection can achieve stable fixation between the two positioning shells and as a preferred setting, the two sets of corresponding locking holes and locking members can be staggered on the two positioning shells, that is, one positioning shell has both locking holes and locking members, so as to prevent the locking members from applying fixing force on one side of the positioning shell, causing the two positioning shells to be misaligned.

[0016] Furthermore, the moving mechanism also includes a steering mechanism, a bogie is provided on the bearing plate, one end of the radial load loader is hingedly provided on the bogie, and the steering mechanism is connected to a control system and controlled by the control system to drive the radial load loader to steer.

[0017] As a specific implementation method between the steering mechanism and the radial load loader, a sliding groove is provided on the side of the radial load loader, and the steering mechanism includes a steering drive and a push block located at the front end thereof and extending and retracting with the steering drive, and the push block is clamped and arranged in the sliding groove and cooperates with the hinge between the bogie to realize steering when the push block extends and retracts. And as a preferred means, an angle identification plate can also be provided near the transparent window of the bearing plate to facilitate manual review by the operator.

[0018] Furthermore, the test bearing installation mechanism includes at least one group of clamping mechanisms, which include a positioning drive member and two clamping members arranged on the positioning drive member and driven by the positioning drive member to move toward or away from each other. The positioning drive member is connected to the control system and is controlled and driven thereby, and the two clamping members cooperate to form a positioning for the bearing to be tested.

[0019] As a clamping mechanism, the implementation method is as follows: the positioning drive member is a screw rod whose rotation is controlled by a control system, and the bottom of the clamping member on it that contacts the screw rod is a forward thread segment and a reverse thread segment respectively, so as to achieve movement towards or away from each other when the screw rod rotates.

[0020] The present application also includes a test method of an aircraft engine bearing tester: the test method is performed in the following manner: Step 1: Install the spindle outer diameter into the drive spindle mounting mechanism; Step 2: Install the bearing to be tested into the test bearing installation mechanism; Step 3: The control system controls the clamping mechanism to position the bearing to be tested, and then controls the moving mechanism to measure the axial width of the bearing to be tested; Step 4: The control system controls the axial load loader to apply the axial load, and changes the force application position of the radial load loader through the axial drive member and / or the steering mechanism; Step 5: The control system resets the radial load loader and the axial load loader; Step 6: Release the installation between the bearing to be tested and the driving spindle and the test bearing installation mechanism and the driving spindle installation mechanism in sequence.

[0021] Since how the control system controls each driving component to achieve movement belongs to the existing technology, it will not be elaborated here. The above method can detect the force conditions at various positions of the bearing shaft ring while reducing the manual operation process as much as possible.

[0022] Furthermore, the clamping mechanism is provided with four groups, two groups are arranged on each side of the radial direction of the bearing to be tested, and the clamping mechanism on each side is respectively arranged at the two ends of that side of the bearing to be tested, so that the control system can first form a positioning between the four groups of clamping mechanisms and the bearing to be tested before controlling the steering drive member to rotate in step 4.

[0023] The above arrangement means that if the radial load loader wants to change the force application position, there is no need for manual further fixation of the bearing to be tested, which can be done automatically by the control system, effectively improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an axonometric diagram of an embodiment of the present invention; Figure 2 It is an axonometric view of the test bench of the embodiment of the present invention; Figure 3 is an axonometric view of a radial load loading machine according to an embodiment of the present invention; Figure 4 It is a side view of a radial load loading machine according to an embodiment of the present invention; Figure 5 It is a partial enlarged view of the sliding groove of the radial load loading machine according to an embodiment of the present invention; Figure 6 It is an axonometric diagram of the moving mechanism of an embodiment of the present invention; Figure 7 An axonometric view of a test bearing mounting mechanism according to an embodiment of the present invention; Figure 8 It is a schematic diagram of a clamping mechanism clamping a bearing to be tested according to an embodiment of the present invention; Fig. 9 An internal view of a drive spindle mounting mechanism according to an embodiment of the present invention; Fig.10 The figure is a flow chart of the test method of the embodiment of the present invention. DETAILED DESCRIPTION

[0025] An aircraft engine bearing testing machine and a testing method thereof according to an embodiment of the present invention are as follows Figure 1-10 As shown, the test bench 1 includes a control system 2 and a moving mechanism 7. An axial load loader 3, a test bearing mounting mechanism 4, a drive spindle mounting mechanism 5 and a radial load loader 6 are arranged on the test bench 1. The axial load loader 3, the test bearing mounting mechanism 4 and the drive spindle mounting mechanism 5 are distributed in the same straight line and the axial load loader 3 and the drive spindle mounting mechanism 5 are located on both sides of the test bearing mounting mechanism 4. The radial load loader is arranged opposite to the test bearing mounting mechanism 4, that is, perpendicular to the test bearing mounting mechanism 4.

[0026] The axial load loader 3, the drive spindle mounting mechanism 5 and the radial load loader 6 are all prior art, and are only briefly described here. The axial load loader 3 and the radial load loader 6 are both provided with a driving mechanism such as a cylinder to drive them, and the moving direction of the axial load loader 3 and the radial load loader 6 is to move toward the direction of the bearing to be tested in the test bearing mounting mechanism 4, so as to abut against the bearing to be tested for detection; at the same time, the axial load loader 3 and the radial load loader 6 must be provided with a pressure sensor and are connected to the control system. In addition, a joint 51 is provided in the drive spindle mounting mechanism 5 near the test bearing mounting mechanism 4, and the inner diameter of the cavity of the drive spindle mounting mechanism 5 is much larger than the outer diameter of the joint 51, so as long as it can cooperate with the joint 51, the cavity can accommodate drive spindles of various outer diameters.

[0027] The moving mechanism 7 comprises an axial driving member 71, a transmission member 72 which is similar to a pulley, and a bearing plate 73 arranged on the transmission member 72. A transparent window 733 is arranged at the center of the bearing plate 73. The radial load loader 6 is fixed on the bearing plate 73 and its extendable detection part is arranged corresponding to the position of the transparent window 733. Monitoring ports 731 are arranged on both sides of the bearing plate 73. A photoelectric sensor 74 is fixed at each monitoring port 731 and the signal sent by the photoelectric sensor 74 can be transmitted from the monitoring port 731. A transmission tooth (not shown in the figure) that rotates with the axial driving member 71 is arranged at the front end of the axial driving member 71, and a meshing portion (not shown in the figure) that meshes with the transmission tooth (not shown in the figure) is arranged on the side of the transmission member 72 facing the axial driving member 71. In addition, a clamping interface (not shown in the figure) that cooperates with the clamping portion (not shown in the figure) on the bearing plate 73 is arranged on the side of the transmission member 72 facing the bearing plate 73 to achieve a fixed connection between the bearing plate 73 and the transmission member 72.

[0028] The moving mechanism 7 also includes a steering mechanism 75 connected to the control system 2 and controlled by the control system 2 to drive the radial load loader 6 to turn. The steering mechanism 75 includes a steering drive 751 and a push block 752 located at the front end thereof and extending and retracting with the steering drive 751. A sliding groove 61 for cooperating with the push block 752 is provided on the side of the radial load loader 6 to achieve a snap connection. A bogie 736 is provided near the corresponding transparent window 733 on the bearing plate 73. The bogie 736 is hinged to the other end of the radial load loader 6. When the push block 752 is extended and retracted, it pushes the radial load loader 6 to rotate with the hinge as the axis. At the same time, in order to facilitate manual verification, an angle identification plate 735 can also be provided at the position of the bearing plate 73 near the transparent window 733.

[0029] A scale mark 11 matching with the bearing plate 73 is arranged on the outer side of the corresponding transmission member 72 of the test bench 1, and an identification line (not shown in the figure) matching with the scale mark 11 is also extended at the center of the bearing plate 73, that is, from the center position of the radial load loader 6.

[0030] The axial drive member 71 and the photoelectric sensor 74 in the above description are both connected to the control system 2 to transmit data thereto and be controlled by the control system 2 .

[0031] The test bearing installation mechanism 4 includes two fixed housings 46 and two positioning housings 41. The fixed housings 46 are fixedly arranged on the test bench 1. The positioning housings 41 and the fixed housings 46 are connected via hinge shafts 42. The hinge shafts 42 are hinged. One part of the fixing parts is arranged on the fixed housing 46, and the other part is arranged on the positioning housing 41. Locking parts 43 and locking holes 44 are respectively arranged at both ends of the upper side of the positioning housing 41. Locking holes 44 and locking parts 43 are respectively arranged on the corresponding positioning housings 41 corresponding to the locking parts 43 and locking holes 44 on the other positioning housing 41. The above two groups of locking parts 43 and locking holes 44 cooperate to complete the fixation between the two positioning housings 41.

[0032] The test bearing installation mechanism 4 is provided with a test window 45 in the extension direction corresponding to the radial load loader 6 , and the length of the test window 45 is set corresponding to the moving distance of the bearing plate 73 , so that the radial load loader 6 can abut against the bearing to be tested for testing.

[0033] The test bearing installation mechanism 4 is also provided with a positioning cavity 48 for placing the bearing and four groups of clamping mechanisms 47 arranged in the positioning cavity 48. Two groups of clamping mechanisms 47 are respectively arranged on both radial sides of the bearing to be tested, that is, on the upper and lower sides of the bearing to be tested, and one group of clamping mechanisms 47 is respectively arranged on the left and right sides of each side of the upper and lower sides, so that the axial and radial positions of the bearing to be tested can be effectively positioned when the clamping mechanisms 47 are controlled by the control system. Each group of clamping mechanisms 47 includes a positioning drive member 471 and two clamping members 472 arranged on the positioning drive member 471, wherein the positioning drive member 471 is a screw rod whose rotation is controlled by the control system 2, and the bottom of the clamping members 472 thereon that contact the screw rod are respectively the forward thread segment and the reverse thread segment, so as to realize the movement towards or away from each other when the screw rod rotates.

[0034] The following is a brief description of the use process of this embodiment, that is, the test method of this embodiment: after the drive spindle is connected to the joint 51 in the drive spindle mounting mechanism 5, the bearing to be tested is placed in the test bearing mounting mechanism 4, and the control system 2 controls the clamping mechanism 47 to clamp the bearing to be tested (at this time, positioning can be achieved only on one side of the radial direction of the bearing to be tested). Then, the two positioning housings 41 are rotated to move the two toward a direction close to each other and the two positioning housings 41 are fixed by the locking members 43 and the locking holes 44 thereon. Then, the bearing plate 73 is moved so that the photoelectric sensors 74 located on both sides of the bearing plate 73 transmit the shaft ring width of the bearing to be tested to the control system 2. Then, the control system 2 controls the axial drive member 71 to drive the bearing plate 73 to move to the corresponding position. In this process, the operator manually checks through the scale mark 11 and the mark line (not shown in the figure) to ensure that the radial load loader 6 moves into place. The axial load loader 3 and the radial load loader 6 move toward the direction of the bearing to be tested and transmit the detection data to the control system 2 for output. During this process, if the force application position of the radial load loader 6 needs to be changed, the clamping mechanism 47 on the other side of the bearing to be tested can be controlled by the control system 2 to fix the bearing to be tested, and the change of the force application position of the radial load loader 6 can be completed through the steering mechanism 75; similarly, if it is necessary to test data at different axial positions, the position change can be achieved through the axial drive member 71. After the test is completed, the axial load loader 3 and the radial load loader 6 are reset, and the installation relationship between the bearing to be tested and the main shaft and the test bearing installation mechanism 4 and the drive main shaft installation mechanism 5 is released in turn.

[0035] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An aircraft engine bearing tester, comprising a test bench, on which an axial load loader, a test bearing mounting mechanism, a drive spindle mounting mechanism and a radial load loader are arranged, wherein the axial load loader, the test bearing mounting mechanism and the drive spindle mounting mechanism are arranged in the same straight line and the axial load loader and the drive spindle mounting mechanism are located on both sides of the test bearing mounting mechanism, the radial load loader is arranged opposite to the test bearing mounting mechanism, and both the radial load loader and the bearing load loader can move toward the test bearing direction, characterized in that: It also includes a moving mechanism, which includes a transmission member, a bearing plate movably arranged on the transmission member, and an axial driving member. The radial load loader is arranged on the bearing plate and is driven by the axial driving member to move the bearing plate on the transmission member. A test window is arranged on the test bearing mounting mechanism, and the length of the test window is set corresponding to the moving distance of the bearing plate.

2. The aircraft engine bearing testing machine according to claim 1, characterized in that: It also includes a control system. Monitoring ports are provided on both sides of the bearing plate. Each monitoring port is provided with a photoelectric sensor connected to the control system and used to measure the unilateral limit of the bearing. After receiving the data from the photoelectric sensor, the control system measures the shaft ring width and controls the axial drive member to move to a suitable position.

3. The aircraft engine bearing testing machine according to claim 1, characterized in that: The front end of the axial driving member is provided with a transmission tooth, one end of the transmission member facing the transmission tooth is meshed with the transmission tooth, and one end of the transmission member facing the bearing plate is provided with a card interface for the bearing plate to be carded.

4. The aircraft engine bearing testing machine according to claim 1, characterized in that: The test bearing installation mechanism comprises symmetrically arranged and openable positioning shells, one of which is provided with a locking piece, and the other positioning shell is provided with a locking hole corresponding to the locking piece and matching with the locking piece.

5. The aircraft engine bearing testing machine according to claim 4, characterized in that: The locking hole and the locking piece are correspondingly arranged on two sides of the positioning housing, and the locking hole and the locking piece are fixed by screwing.

6. The aircraft engine bearing testing machine according to claim 2, characterized in that: The moving mechanism also includes a steering mechanism. A bogie is arranged on the bearing plate. One end of the radial load loader is hingedly arranged on the bogie. The steering mechanism is connected to a control system and is controlled by the control system to drive the radial load loader to steer.

7. The aircraft engine bearing testing machine according to claim 6, characterized in that: The test bearing installation mechanism includes at least one group of clamping mechanisms, which include a driving member and two clamping members arranged on a positioning driving member and driven by the positioning driving member to move toward or away from each other. The positioning driving member is connected to a control system and is driven by the control system. The two clamping members cooperate to position the bearing to be tested.

8. The test method of the aircraft engine bearing tester according to any one of claims 1 to 7 is carried out in the following manner: Step 1: Install the spindle outer diameter into the drive spindle mounting mechanism; Step 2: Install the bearing to be tested into the test bearing installation mechanism; Step 3: The control system controls the clamping mechanism to position the bearing to be tested, and then controls the moving mechanism to measure the axial width of the bearing to be tested; Step 4: The control system controls the axial load loader to apply the axial load, and changes the force application position of the radial load loader through the axial drive member and / or the steering mechanism; Step 5: The control system resets the radial load loader and the axial load loader; Step 6: Release the installation between the bearing to be tested and the driving spindle and the test bearing installation mechanism and the driving spindle installation mechanism in sequence.

9. The test method of the aircraft engine bearing tester according to claim 8, characterized in that: The clamping mechanism is provided with four groups, two groups are provided on each radial side of the bearing to be tested, and the clamping mechanism on each side is respectively provided at the two ends of that side of the bearing to be tested, so that the control system can first form a positioning between the four groups of clamping mechanisms and the bearing to be tested before controlling the steering drive member to rotate in step 4.

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