Vibration test magnitude amplifying device

Abstract

The utility model provides a vibration test magnitude amplification device, which comprises a switching bottom plate, a large bracket, a small bracket, a sleeve and a plurality of fasteners, and is characterized in that the whole device is placed on a vibration test bed, the switching bottom plate is used as a foundation of the whole device and is connected with a table top of the vibration test bed, a displacement sensor is mounted in the sleeve, and a cylinder body penetrates through the large bracket and the small bracket; all the components are rigidly connected through fasteners, the overall device can amplify the magnitude of random vibration excitation of the vibration test bed according to an expected effect, and a large-scale acceleration response control random vibration test on a tested product is achieved; the whole device can be applied to a large-scale random vibration test for quality inspection of various displacement sensors.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of quality reliability test, and particularly relates to a vibration test value amplification device. BACKGROUND

[0002] The actuator cylinder in the flight control system of an airplane drives the piston rod to extend or retract through a hydraulic system to control the deployment and retraction of the leading edge flap. The displacement sensor, as a feedback mechanism of the actuator cylinder, feeds back the displacement generated by the piston movement to the electronic control to realize closed-loop control. The displacement sensor mainly consists of the following components: a shell assembly, a core assembly, a coil assembly and a magnetic conductor. The mechanical vibration load value of the actuator cylinder of the airplane at some specific positions on the airplane is large, the iron core rod part belongs to a large-stroke cantilever structure, the vibration value thereof is larger, and cracks are prone to occur at the end round corner of the iron core rod, thereby causing functional failure.

[0003] It is known through simulation analysis that the vibration value of a sensor located in the actuator cylinder of the airplane exceeds 100g. The vibration resistance of the iron core rod has a great risk, but it is difficult to correctly obtain the vibration fatigue life of the iron core rod through simulation analysis, and needs to be verified through test. However, the vibration value of the traditional test fixture can only reach 20g-30g, and cannot be adjusted according to the test requirements. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a vibration test value amplification tool. The mechanical vibration load value of the actuator cylinder of the airplane at some specific positions on the airplane is large, the iron core rod part belongs to a large-stroke cantilever structure, the vibration value thereof is larger, and cracks are prone to occur at the end round corner of the iron core rod, thereby causing functional failure, and the product demand cannot be met.

[0005] The application provides a vibration test value amplification device, which comprises a sensor clamping and fixing module, a support conversion module and a transmission connection module.

[0006] The sensor clamping and fixing module comprises a fixed sleeve, a steel wire sleeve and a head support ring in the inner cavity of the fixed sleeve, the fixed sleeve is connected with the sleeve in a flange connection mode, and a strict shaft hole positioning is formed at the end of the fixed sleeve, a middle guide ring is arranged in the left end inner cavity of the sleeve, and a tail support ring is arranged in the right end inner cavity of the sleeve.

[0007] The support conversion module comprises a large support, which is composed of a horizontal fixed surface and a vertical fixed surface arranged with a flange connection hole and having a positioning circular hole in the center of the vertical fixed surface.

[0008] The transmission connection module comprises an adapter bottom plate and a bolt, the adapter bottom plate is arranged with a hole position connected with a test table moving coil, and the bolt hole is connected with the large support, the small support and the fixing system.

[0009] Preferably, the sleeve is connected to the test sensor by bolts, and the sleeve end is provided with a circular shear load relief counterbore.

[0010] Preferably, the large bracket is connected to the sensor clamping fixing module through a flange hole in the vertical plane, and the middle positioning circular hole centers the fixing sleeve; the small bracket and the fixing system include the small bracket, the pressing plate and the bolt, and the small bracket, the pressing plate and the bolt are in a locked state.

[0011] Preferably, each connecting hole is provided with a bolt loaded with a pre-tightening force according to GJB-150.

[0012] Preferably, during the test, the sensor is installed in the sleeve and the overall inner cavity according to the installation requirements, the fixing sleeve is connected to the large bracket through the bolt, the small bracket and the fixing system are tightly clamped to the sleeve and fixed to the adapter base plate, all the φ12 holes on the adapter base plate are connected to the moving coil of the vibration table, and the entire test device forms a rigid connection. After the entire vibration environment test system is built, the acceleration sensor, the monitoring acceleration sensor and the data acquisition controller form a measurement system.

[0013] Preferably, the acceleration sensor is arranged in the middle of the tool base plate and is used for monitoring or controlling the output of the vibration table.

[0014] The application has the following technical effects:

[0015] The device amplifies the vibration level of the vibration test table according to the expected requirements, and provides a verification basis for the design and research verification of the large-stroke vibration resistance of a new four-redundancy sensor.

[0016] The device is an amplification tool designed for a large-stroke displacement sensor. The overall device is fixed on the vibration test table at multiple points, and the adapter base plate is connected to the vibration test table surface as the basis of the overall device. The displacement sensor is installed in the sleeve, and the cylinder passes through the large bracket and the small bracket to form a cantilever structure. The components are rigidly connected through flanges and fasteners. The simulation analysis and test verify the amplification effect, in which: the finite element analysis of the natural frequency in the vibration direction is 482 Hz, and the amplification ratio is about 37; the modal test of the vertical natural frequency is 457.65 Hz, the acceleration response value is 79.9g, and the amplification ratio is 39.95. Further, a vibration test system for the displacement sensor is built. During the random vibration test process, the root mean square value of the monitoring accelerometer reaches 130g at a frequency of about 420Hz, and the response amplitude is 280g2 / Hz, which is basically consistent with the requirements of the displacement sensor.

[0017] The device can be widely used for large-scale vibration tests of test objects, and provides a reference for subsequent design iteration and optimization.

[0018] The device can effectively use the acceleration response control method, provide verification means for the effectiveness and feasibility of similar military and civilian product design and manufacture, and has good universality and scalability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a vibration level amplification device structure schematic diagram according to the acceleration response control of the embodiment;

[0020] Figure 2 It is a main view and a sectional view of the vibration level amplification device of the acceleration response control;

[0021] Figure 3 It is a main view of the connection between the base of the overall device and the table surface of the vibration test table;

[0022] Figure 4 It is a top view of the connection between the base of the overall device and the table surface of the vibration test table;

[0023] Among them, 1 is a sensor clamping and fixing module, 101 is a steel wire sleeve, 102 is a head support ring, 103 is a fixing sleeve, 104 is a middle guide ring, 105 is a sleeve, 106 is a tail support ring, 107 is a screw, 2 is a support conversion module, 201 is a first bolt, 202 is a large support, 203 is a second bolt, 204 is a small support and a fixing system, 3 is a transmission connection module, 301 is an adapter bottom plate, 302 is a third bolt, and 303 is a fourth bolt. DETAILED DESCRIPTION

[0024] Please refer to Figures 1-4 The application relates to a vibration level amplification device capable of acceleration response control and a test method, and belongs to the technical field of quality reliability test. The device comprises an adapter bottom plate, a large support, a small support, a sleeve and a plurality of fasteners. The overall device is placed on a vibration test table, the adapter bottom plate is connected to the table surface of the vibration test table as the base of the overall device, a displacement sensor is installed in the sleeve, and the sleeve passes through the large support and the small support. The components are rigidly connected through the fasteners. The overall device can amplify the magnitude of the random vibration excitation of the vibration test table according to the expected effect, realizes the large-magnitude acceleration response control random vibration test of the measured product, and can be applied to large-magnitude random vibration tests for quality inspection of various displacement sensors.

[0025] A vibration test value amplification tool is provided. At present, the mechanical vibration load value of an aircraft actuator at some specific positions on the aircraft is large, the iron core rod part belongs to a large-stroke cantilever structure, the vibration value of the iron core rod part is larger, cracks are easily generated at the round corner of the end of the iron core rod, functional failure is caused, and the product demand cannot be met.

[0026] Through simulation analysis, it is known that the vibration value of a sensor located in the actuator cylinder of an aircraft exceeds 100g. The anti-vibration capability of the core rod is at great risk, but it is difficult to correctly obtain the vibration fatigue life of the core rod through simulation analysis, and it needs to be verified through test.

[0027] Since the actuator cylinder and sensor do not have a physical object, a sensor with a larger range and a smaller core rod diameter is selected for physical vibration test verification. If the substitute sensor passes the test, the original sensor can withstand 100g vibration, otherwise, it can also provide an optimization approach for the original sensor.

[0028] In view of the difficulty of high vibration value vibration test of a certain large displacement sensor, a kind of amplification tooling is proposed, and its amplification effect is verified through simulation analysis and test. Further, a vibration test system of displacement sensor is built, and the high value vibration test of displacement sensor is successfully completed by using acceleration response control method. The completion of the test verifies the effectiveness and feasibility of the amplification tooling and response control method, which has important application value for large-scale vibration test.

[0029] Referring to the real installation environment and constraint boundary of the sensor, an amplification tooling is designed through multiple iterations. The displacement sensor is installed in the sleeve of the tooling, and the sleeve is fixed to the large support through the flange plate at one end. In order to simulate the real boundary of the actuator cylinder and improve the stiffness of the tooling, a small support is added in the middle of the sleeve. The large support and the small support are fixed to a 20mm thick bottom plate through M12 bolts, and the bottom plate is connected to the moving coil of the 12 ton vibration table. The material of the amplification tooling is 45 steel. By adjusting the installation position of the small support screw, the second-order modal frequency can be increased, which can be used for verification in another direction.

[0030] Usage: After the final design of the amplification tooling model is processed and produced, the sensor is installed in the amplification tooling according to the installation requirements. Then all φ12 holes on the bottom plate of the amplification tooling are connected to the moving coil of the vibration table, and the entire vibration environment test system is built. The acceleration sensor, the monitoring acceleration sensor and the data acquisition controller form a measurement system. The acceleration sensor is located in the middle of the tooling bottom plate, which is used to monitor or control the output of the vibration table; the acceleration sensor is located at the connection position of the tooling and the sensor. In order to facilitate the installation of the sensor, a platform perpendicular to the vibration direction is specially milled during tooling processing. This sensor is used to monitor the response level of the amplification tooling.

[0031] The displacement sensor can be installed in the sleeve of the tooling, which is convenient to disassemble and has good integrity.

[0032] 2) The tooling can complete the vibration value amplification function, and the support supports the cantilever structure with high level amplification ratio.

[0033] 3) The device can be used to complete high-value vibration test by acceleration response control method, and provides a solution for high-level vibration test.

[0034] In other embodiments of the application, a high-vibration-value vibration test specific implementation scheme of a certain large-stroke displacement sensor is further described:

[0035] The designed vibration test value amplification device includes:

[0036] The sensor clamping and fixing module 1, the support conversion module 2, and the transmission connection module 3. The sensor clamping and fixing module includes: a steel wire sleeve 101 and a head support ring 102 are arranged in the inner cavity of a fixed sleeve 103, the fixed sleeve 103 is connected with a sleeve 105 in a flange connection manner and forms a strict shaft hole positioning at the end, a middle guide ring 104 is arranged in the left end inner cavity of the sleeve 105, a tail support ring 106 is arranged in the right end inner cavity of the sleeve 105, the sleeve 105 is connected with the test sensor through a bolt 107, and a circular shear load relief counterbore is left at the end of the sleeve 105. Figure 1 ).

[0037] The support conversion module (such as Figure 2 ) includes: a large bracket 202, which is composed of a horizontal fixed surface and a vertical fixed surface arranged with a flange connection hole and forming a 90-degree angle, a positioning circular hole is arranged in the center of the vertical fixed surface, the large bracket 202 is connected with the sensor clamping and fixing module through the flange hole on the vertical surface, the middle positioning circular hole forms a centering for the fixed sleeve 103, and a small bracket and a fixing system 204 include a small bracket, a pressing plate and a bolt, which are in a locked state.

[0038] The transmission connection module 3 (such as Figure 3 ) includes: an adapter bottom plate 301, a bolt 302, and a bolt 303. The adapter bottom plate is arranged with a hole position connected with the moving coil of the test table, and a bolt hole connected with the large bracket 202, the small bracket and the fixing system 204. Each connection hole is pre-tightened by a bolt according to GJB-150.

[0039] During the test, the sensor is installed in the sleeve 105 and the inner cavity of the whole body according to the installation requirements, the fixed sleeve 103 is connected with the large bracket 202 through the bolt, the small bracket and the fixing system 204 clamp the sleeve 105 and are fixed with the adapter bottom plate 301, all φ12 holes on the adapter bottom plate 301 are connected with the moving coil of the vibration table, and the whole test device forms a rigid connection. After the whole vibration environment test system is built, the acceleration sensor, the monitoring acceleration sensor and the data acquisition controller form a measurement system. The acceleration sensor is arranged in the middle of the tool bottom plate and is used for monitoring or controlling the output of the vibration table.

Claims

1. A vibration test value amplification device, characterized in that, The device comprises a sensor clamping and fixing module, a support conversion module and a transmission connection module. The sensor clamping and fixing module comprises a fixing sleeve, a steel wire sleeve and a head support ring in the inner cavity of the fixing sleeve, the fixing sleeve is connected with the sleeve by a flange connection and the end part forms a strict shaft hole positioning, the left end cavity of the sleeve is provided with a middle guide ring, and the right end cavity of the sleeve is provided with a tail support ring. The support conversion module comprises a large support, which is composed of a horizontal fixing surface and a vertical fixing surface arranged with a flange connection hole and forming a 90-degree angle, and a positioning circular hole is arranged in the center of the vertical fixing surface. The transmission connection module comprises an adapter bottom plate and a bolt, the adapter bottom plate is provided with a hole position connected with a movable coil of a test bench and a bolt hole connected with the large support, the small support and the fixing system.

2. The apparatus of claim 1, wherein, The sleeve is connected with the test sensor by a bolt, and a circular shear load relief counterbore is left at the end of the sleeve.

3. The apparatus of claim 2, wherein, The large support is connected with the sensor clamping and fixing module through the flange hole on the vertical surface, the middle positioning circular hole forms the centering of the fixing sleeve, the small support and the fixing system comprise a small support, a pressing plate and a bolt, and the small support, the pressing plate and the bolt are in a locked state.

4. The apparatus of claim 3, wherein, Each connection hole is provided with a bolt loaded with a pre-tightening force according to GJB-150.

5. The apparatus of claim 4, wherein, During the test, the sensor is installed in the sleeve and the inner cavity of the whole body according to the installation requirements, the fixing sleeve is connected with the large support through the bolt, the small support and the fixing system clamp the sleeve and are fixed with the adapter bottom plate, all φ12 holes on the adapter bottom plate are connected with the movable coil of the vibration table, the whole test device forms a rigid connection, after the whole vibration environment test system is built, the acceleration sensor, the monitoring acceleration sensor and the data acquisition controller form a measurement system.

6. The apparatus of claim 5, wherein, The acceleration sensor is arranged in the middle of the tool bottom plate and is used for monitoring or controlling the output of the vibration table.

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