Loading device and method for brake vibration test

Abstract

According to the loading device and method for the vibration test of the brake, a motor flexible shaft drives a driving mechanism to rotate to transmit power to the input end of a product, the output end of the product loads axial force through a thrust mechanism, and an eddy current sensor assembly is used for measuring the radial clearance variation of a spline of the product under a vibration load. The device can simulate and measure the actual use condition and vibration performance of a product on an airplane, can truly examine the performance and reliability of the product under the vibration test condition, is convenient to operate, can meet the vibration test requirements of products of the same type and different specifications, and has high applicability.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of vibration test, and relates to a loading device and method for brake vibration test. BACKGROUND

[0002] The brake is a power transmission component of the aircraft flap / slit wing, is an important part of the aircraft control system, can transmit the power at the input end of the transmission shaft to the output end in the unlocked state, has the functions of braking and holding the transmission shaft in the braking state, and the anti-vibration performance directly affects the flight quality of the aircraft. The vibration device is used for connecting a product and a vibration table, and transmits the energy of the vibration table to the product without distortion. The reliability of the test result of the product is directly related to the design and manufacturing level of the test device.

[0003] The traditional vibration device only fixes and installs the product interface, completes the test in a non-working state, and does not consider the influence of the transmission performance and external load of the product on the vibration test, so that the test result is difficult to truly reflect the mechanical performance and anti-vibration capacity of the product. SUMMARY

[0004] The application aims to provide a loading device and method for brake vibration test, which can input power to the input end of the product through the rotation of the driving mechanism driven by the motor flexible shaft, load the axial force on the output end of the product through the thrust mechanism, and measure the radial gap change of the product spline under the vibration load through the eddy current sensor assembly, so that the actual use condition and vibration performance of the product on the aircraft can be simulated and measured, the operation is simple and convenient, the applicability is high, the mechanical performance and reliability of the product under the vibration test condition can be truly evaluated, and the requirements of the brake product on the vibration test are met.

[0005] The first aspect of the application provides a vibration test loading device for brake product, which comprises a bottom plate 1, a driving mechanism 2, a left support 3, a right support 4, a thrust mechanism 5, a bolt 6, a fastening screw 7, a gasket 8, a nut 9 and a sensor support 10, wherein The bottom plate 1 is connected to the vibration table at the bottom and is fixed with the driving mechanism 2, the left support 3, the right support 4, the thrust mechanism 5 and the sensor support 10 at the top through the bolt 6; The right end of the driving mechanism 2 is connected with the outer spline of the input end of the brake through the inner spline, and the left end is connected with the motor flexible shaft through the inner spline and the threaded structure. The bearing rotating structure is arranged in the driving mechanism, and is used for transmitting power to the input end of the brake; The left support 3 and the right support 4 are fixed with the flange surfaces at two ends of the brake through the fastening screw 7, the gasket 8 and the nut 9; The left end of the thrust mechanism 5 is connected with the outer spline of the output end of the brake through the inner spline, and the spring structure is arranged in the thrust mechanism 5 and is used for loading the axial load on the output end of the brake. The axial force requirement in a certain range can be met by changing the compression amount of the spring; The sensor support 10 fixes the eddy current sensor probe through double nuts, and is used for measuring the radial clearance of the brake spline shaft under the vibration load.

[0006] Optionally, the driving mechanism 2 comprises a positioning seat 2-1, a gland 2-2, a check ring 2-3, a spline shaft 2-4, a screw 2-5 and a bearing 2-7. The lower end of the positioning seat 2-1 is provided with a bolt mounting hole, and the bolt 6 is used to fix the bottom plate 1; the upper end is provided with a positioning cavity, and the bearing 2-7 is arranged in the positioning cavity. The right end of the gland 2-2 is provided with a bolt mounting hole, and the screw 2-5 is used to fix the positioning cavity of the positioning seat 2-1; the left end of the gland 2-2 is provided with external threads, and is connected with the flexible shaft screw sleeve. The spline shaft 2-4 passes through the inner hole of the bearing 2-7, and is fixed with the end face of the bearing 2-7 through the check ring 2-3; the left end of the spline shaft 2-4 is provided with internal splines, and is connected with the external splines of the flexible shaft; the right end is provided with internal splines, and is connected with the external splines of the input end of the brake.

[0007] Optionally, the external splines of the flexible shaft are connected with the left end internal splines of the spline shaft 2-4 through the gland 2-2.

[0008] Optionally, the driving mechanism 2 further comprises a spacer sleeve 2-6. Two bearings 2-7 are arranged in the positioning cavity, and the spacer sleeve 2-6 is arranged between the two bearings 2-7.

[0009] Optionally, the thrust mechanism 5 comprises a support seat 5-1, an adjusting nut 5-2, a thrust ball bearing 5-3, a compression spring 5-4, a joint 5-5 and an oil cup 5-6. The lower end of the positioning seat 5-1 is provided with a bolt mounting hole, and the bolt 6 is used to fix the bottom plate 1; the upper end is provided with a positioning cavity, and the right end of the positioning cavity is provided with internal threads. The adjusting nut 5-2 is threadedly connected at the right end of the positioning cavity; the left end of the adjusting nut 5-2 is provided with a positioning cavity, and is used to install the thrust ball bearing 5-3. The joint 5-5 is arranged in the positioning cavity and is in small gap cooperation with the thrust ball bearing 5-3; the left end of the joint 5-5 is provided with a limiting ring. The compression spring 5-4 is sleeved on the joint 5-5, and one end abuts against the thrust ball bearing 5-3, and the other end abuts against the limiting ring. The compression amount of the compression spring 5-4 is adjusted by the axial movement of the adjusting nut 5-2. An annular groove is arranged in the positioning cavity, and an oil hole connected with the annular groove is arranged on the positioning cavity; the oil cup 5-6 is installed on the oil hole, and is used to inject lubricating oil into the annular groove, so as to lubricate and reduce the friction between the joint 5-5 and the cooperation surface of the positioning cavity. The left end of the joint 5-5 is connected with the external splines of the output end of the brake through internal splines.

[0010] Optionally, when the left end surface of the shaft shoulder of the joint 5-5 is flush with the left end surface of the positioning seat 5-1, the spacing between the left end of the limiting ring and the inner end surface of the positioning cavity is L, which is used to determine the size of the reaction axial force.

[0011] Optionally, the right end of the adjusting nut 5-2 is marked with a scale line.

[0012] Optionally, screw holes 1-1 are formed in the bottom plate 1 and connected with the screw holes of the vibration table, which is used to transmit the energy of the vibration table.

[0013] The second aspect of the present application provides a vibration test loading method for a brake product, which adopts the device of any one of the first aspect, and the method comprises: The flange hole at the two ends of the brake is fixed with the left support 3 and the right support 4 through the fastening screw 7, the washer 8 and the nut 9, and is fixed on the bottom plate 1 through the bolt 6; The right end inner spline of the driving mechanism 2 is connected with the outer spline of the input end of the brake, and the left end inner spline is connected with the motor flexible shaft, which is fixed on the bottom plate 1 through the bolt 6; The left end inner spline of the thrust mechanism 5 is connected with the outer spline of the output end of the brake, and the end surface is in contact state, the spring compression amount is adjusted to make the thrust mechanism 5 provide a preset axial force, and the thrust mechanism 5 is fixed on the bottom plate 1 through the bolt 6; The sensor support 10 is fixed with the eddy current sensor probe through double nuts; The motor and the vibration table are started, and the vibration test under the load of the brake in three directions of the working state is completed according to the test procedure.

[0014] The present application has the following advantages: 1. The power of the motor flexible shaft is transmitted to the input end of the brake through the driving mechanism 2, so that the test under the working state of the product is realized.

[0015] 2. The axial force is loaded on the output end of the brake through the thrust mechanism 5, so that the anti-vibration performance of the product under the axial load is evaluated.

[0016] 3. The adjusting nut 5-2 in the thrust mechanism 5 is rotated to adjust the spring compression amount, so that the loading force in a certain range is met.

[0017] 4. The radial clearance of the spline shaft of the product under the vibration load can be measured through the eddy current sensor assembly, and the potential failure is evaluated.

[0018] 5. By replacing the interface parts of the drive mechanism 2 and the thrust mechanism 5, the installation requirements of products of different specifications of the same type can be met, which has strong applicability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the brake interface load provided in an embodiment of the present invention; Figure 2 A schematic diagram of a vibration testing system provided in an embodiment of the present invention; Figure 3 A schematic diagram of a loading device for brake vibration testing provided in an embodiment of the present invention; Figure 4 A cross-sectional view of a loading device for brake vibration testing provided in an embodiment of the present invention; Figure 5 A cross-sectional view of the drive mechanism structure provided in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the thrust mechanism structure provided in an embodiment of the present invention; Explanation of reference numerals in the attached figures: 1-Base plate, 2-Drive mechanism, 3-Left support, 4-Right support, 5-Thrust mechanism, 6-Bolt, 7-Fasting screw, 8-Washer, 9-Nut, 10-Sensor support; 1-1 Screw hole; 2-1-Positioning seat, 2-2-Pressure cap, 2-3-Retaining ring, 2-4-Splined shaft, 2-5-Screw, 2-6-Spacer, 2-7-Bearing; 5-1-Support base, 5-2-Adjusting nut, 5-3-Thrust ball bearing, 5-4-Compression spring, 5-5-Connector, 5-6-Oil cup. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings: like Figures 1-6 As shown, the present invention provides a vibration test loading device for brake products, comprising: a base plate 1, a drive mechanism 2, a left support 3, a right support 4, a thrust mechanism 5, a bolt 6, a fastening screw 7, a washer 8, a nut 9, and a sensor support 10.

[0022] The bottom plate 1 is fixed with the driving mechanism 2, the left support 3, the right support 4, the thrust mechanism 5 and the sensor support 10 through the bolt 6. The bottom plate 1 is provided with screw holes 1-1 connected with corresponding screw holes of the vibration table for transmitting the vibration energy of the vibration table; the right end of the driving mechanism 2 is connected with the outer spline of the input end of the brake through the inner spline, and the left end is connected with the motor flexible shaft through the inner spline and the thread structure; the driving mechanism is provided with bearing rotating structure for transmitting power to the input end of the product; the left support 3 and the right support 4 are fixed with the flange faces of the two ends of the brake through the fastening screw 7, the washer 8 and the nut 9; the left end of the thrust mechanism 5 is connected with the outer spline of the output end of the product through the inner spline, and the inner spline is provided with spring structure for adding axial load to the output end of the brake; the spring compression amount can be changed to meet the loading force requirement in a certain range; the sensor support 10 is fixed with the eddy current sensor probe through double nuts for measuring the radial clearance of the spline shaft of the product under the vibration load.

[0023] Method for use: firstly, the flange faces of the two ends of the product are fixed with the left support 3 and the right support 4 through the fastening screw 7, the washer 8 and the nut 9, and are fixed on the bottom plate 1 through the bolt 6; the right end of the driving mechanism 2 is connected with the outer spline of the input end of the brake through the inner spline, and the left end is connected with the motor flexible shaft through the inner spline; the universal bolt 6 is fixed on the bottom plate 1; when used, the left end of the thrust mechanism 5 is connected with the outer spline of the output end of the brake through the outer force, and the end face is ensured to be in contact state, and is fixed on the bottom plate 1 through the bolt 6; the sensor support 10 is fixed with the eddy current sensor probe through double nuts. The installation integrity of the product and the fixture is checked, the equipment is started, and the vibration test of the product under the working state in three directions is completed according to the test procedure.

[0024] Figure 1 The application provides a brake interface load schematic diagram, product fixed interfaces are flange face mounting holes, spline shaft assemblies are used for transmitting and limiting system power output, the product can bear certain axial load in actual flight, so that the vibration test needs to simulate the actual working state on the machine to truly examine the mechanical performance of the product.

[0025] Figure 2 The application provides a vibration test system schematic diagram, which is composed of a vibration table system, a vibration loading device, a motor flexible shaft device and an eddy current sensor. The vibration table system provides excitation, the motor flexible shaft device provides torque and power output, the vibration loading device transmits power and applies load, and the eddy current sensor is used for measuring the radial clearance of the spline of the product under the vibration load, so as to truly examine the anti-vibration performance and reliability of the product under the working state.

[0026] Figure 3 The application provides a structure schematic diagram of a vibration test loading device for a brake, Figure 4 The application provides a structure schematic diagram of a vibration test loading device for a brake, Figure 3The embodiment shown provides a vibration test loading device cross-sectional view. Referring to Figure 3 and Figure 4 As shown, the embodiment of the present application provides a brake vibration test loading device mainly comprises: a base plate 1, a drive mechanism 2, a left support 3, a right support 4, a thrust mechanism 5, a bolt 6, a fastening screw 7, a washer 8, a nut 9, a sensor support 10.

[0027] The base plate 1 has a plurality of bolt mounting holes 1-1, which are connected to the vibration table surface by bolts for transmitting the energy of the vibration table. The base plate 1 has a plurality of bolt holes, which are used to fix the drive mechanism 2, the left support 3, the right support 4, the thrust mechanism 5, and the sensor support 10 by bolts 6. The base plate has positioning keys 1-2 at both ends, which are used in cooperation with the key grooves of the drive mechanism 2 and the thrust mechanism 5 for adjusting the axial distance of the device. The left end of the drive mechanism 2 is connected to the motor flexible shaft through internal spline and thread structure, and the right end internal spline is connected to the outer spline of the brake input end, which is provided with bearing rotating structure inside for transmitting power to the product input end. The left support 3 and the right support 4 are fixed to the flange surface of the product by fastening screw 7, washer 8, and nut 9. The left end of the thrust mechanism 5 is connected to the outer spline of the product output end through internal spline, which is provided with spring structure inside for adding axial load to the product output end. The sensor support 10 is fixed to the eddy current sensor probe by double nuts, and the eddy current sensor is used to measure the radial gap change of the product spline under vibration load.

[0028] Figure 5 The drive mechanism structure cross-sectional view provided by the embodiment comprises a positioning seat 2-1, a gland 2-2, a check ring 2-3, a spline shaft 2-4, a screw 2-5, a spacer sleeve 2-6, and a bearing 2-7. In this structure, the lower end of the positioning seat 2-1 has a bolt mounting hole, which is fixed to the base plate 1 by a bolt, and the upper end has a positioning cavity for installing the gland 2-2, the spacer sleeve 2-6, and the bearing 2-7. The right end of the gland 2-2 has a bolt mounting hole, which is fixed to the positioning seat 2-1 by the screw 2-5, and the left end is provided with external threads for connecting with the flexible shaft sleeve. The spline shaft 2-4 passes through the bearing hole and is fixed to the bearing end face by the check ring 2-3. The left end of the spline shaft has internal spline, which is connected to the outer spline of the flexible shaft, and the right end has internal spline, which is connected to the outer spline of the product input end. The whole drive mechanism rotates flexibly and stably, and plays a role in transmitting motor power.

[0029] Figure 6The thrust mechanism structure sectional view provided for the embodiment is composed of a support base 5-1, an adjusting nut 5-2, a thrust ball bearing 5-3, a compression spring 5-4, a joint 5-5 and an oil cup 5-6. In the structure, the lower end of the positioning base 5-1 is provided with a bolt mounting hole, and the upper end is provided with a positioning cavity, a threaded hole and an annular groove, which are used for mounting the adjusting nut 5-2, the joint 5-5 and the oil cup 5-6. The oil cup 5-6 is filled with lubricating oil, which is stored in the annular groove of the positioning base 5-1, and plays a lubricating and friction-reducing role on the matching surface. The left end of the adjusting nut 5-2 is provided with a positioning cavity, which is used for mounting the thrust ball bearing 5-3. The right end is marked with a scale line. The spring compression amount is adjusted by the axial movement of the adjusting nut 5-2, so as to ensure that the axial force of the thrust assembly can be adjusted within a certain range. The joint 5-5 passes through the inner hole of the support base 5-1 and cooperates with the small gap of the thrust ball bearing 5-3. The compression spring 5-4 is installed between the joint and the thrust ball bearing. The whole thrust mechanism plays a role of loading axial force and rotating.

[0030] The thrust mechanism axial force adjusting method is as follows: the joint 5-5, the compression spring 5-4, the thrust ball bearing 5-3 and the adjusting nut 5-2 are sequentially installed in the support base 5-1, the adjusting nut 5-2 is tightened to contact the end surface of the spring, the free length of the spring is ensured, the joint 5-5 is moved to the right by a distance L with the help of external force, and the A surface and the B surface are flush. Figure 6 At this time, the thrust mechanism 5 can be installed on the base. At this time, the spring compression amount L is defined as the initial compression amount, and the generated spring force F is P*L, wherein F is the spring force, P is the spring stiffness, and L is the deformation amount.

[0031] When it is necessary to adjust the size of the axial force, the adjusting nut 5-2 is rotated to change the spring compression amount and align the scale line, so as to realize the adjustment of the axial force within a certain range.

[0032] For example, when it is necessary to adjust the axial force in a large range, a corresponding joint 5-5 is generated according to the new L.

[0033] The embodiment of the application only provides a vibration test loading device for a type of brake, but is not limited to the field of vibration test. For brake products of the same type and different specifications and sizes, the installation and use of new products can be adapted by replacing the driving mechanism, the left and right mounting bases and the interface part in the thrust mechanism.

Claims

1. A vibration test loading device for a brake product, characterized by, The utility model relates to a kind of brake test device, including: Base plate (1), drive mechanism (2), left support (3), right support (4), thrust mechanism (5), bolt (6), fastening screw (7), washer (8), nut (9), sensor support (10);Wherein, The bottom of base plate (1) is connected on vibration table, and the top is fixed drive mechanism (2), left support (3), right support (4), thrust mechanism (5) and sensor support (10) by bolt (6); Drive mechanism (2) right end is connected with brake input end outer spline through inner spline, left end is connected with motor flexible shaft through inner spline, screw structure, drive mechanism is equipped with bearing rotation structure, for giving brake input end transmission power; Left support (3), right support (4) are fixed brake both end flange surface through fastening screw (7), washer (8), nut (9); Thrust mechanism (5) left end is connected with brake output end outer spline through inner spline, is equipped with spring structure inside, for giving brake output end axial load, by changing spring compression amount, axial force requirement in certain range can be satisfied; Sensor support (10) is fixed eddy current sensor probe through double nut, for measuring the radial clearance of brake spline shaft under vibration load.

2. The vibration test loading device for brake products according to claim 1, characterized by Drive mechanism (2) includes: positioning seat (2-1), gland (2-2), retainer (2-3), spline shaft (2-4), screw (2-5), bearing (2-7); Positioning seat (2-1) lower end is provided with bolt mounting hole, is fixed with base plate (1) using bolt (6), upper end is provided with positioning cavity, and bearing (2-7) is arranged in the positioning cavity; Gland (2-2) right end is provided with bolt mounting hole, is fixed on the positioning cavity of positioning seat (2-1) using screw (2-5), and the left end of gland (2-2) is provided with outer thread, is connected with flexible shaft screw sleeve; Spline shaft (2-4) passes through the inner hole of bearing (2-7), is fixed with the end surface of bearing (2-7) using retainer (2-3), and the left end of spline shaft (2-4) is provided with inner spline, is connected with flexible shaft outer spline, and the right end is provided with inner spline, is connected with brake input end outer spline.

3. The vibration test loading device for brake products according to claim 2, characterized by Flexible shaft outer spline passes through gland (2-2) and is connected with the left end inner spline of spline shaft (2-4).

4. The vibration test loading device for brake products according to claim 2, wherein Drive mechanism (2) further includes: spacer sleeve (2-6); Two bearings (2-7) are arranged in the positioning cavity, and spacer sleeve (2-6) is arranged between the two bearings (2-7).

5. The vibration test loading device for brake products according to claim 1, wherein Thrust mechanism (5) includes: support seat (5-1), adjusting nut (5-2), thrust ball bearing (5-3), compression spring (5-4), joint (5-5), oil cup (5-6); Positioning seat (5-1) lower end is provided with bolt mounting hole, is fixed with base plate (1) using bolt (6), upper end is provided with positioning cavity, and the right end of positioning cavity is provided with inner thread; Adjusting nut (5-2) is threadedly connected at the right end of positioning cavity, and the left end of adjusting nut (5-2) is provided with positioning cavity, for installing thrust ball bearing (5-3); Joint (5-5) is arranged in the positioning cavity and is matched with thrust ball bearing (5-3) small clearance;Limiting ring is arranged at the left end of joint (5-5). The compression spring (5-4) is sleeved on the joint (5-5) and abuts against the thrust ball bearing (5-3) at one end and abuts against the limiting ring at the other end; The compression amount of the compression spring (5-4) is adjusted by adjusting the axial movement of the adjusting nut (5-2); An annular groove is arranged in the positioning cavity, an oil injection hole connected with the annular groove is arranged on the positioning cavity, and the oil injection cup (5-6) is installed on the oil injection hole and used for injecting lubricating oil into the annular groove to lubricate and reduce the friction of the mating surface of the joint (5-5) and the positioning cavity; The left end of the joint (5-5) is connected with the outer spline of the output end of the brake through the inner spline.

6. The vibration test loading device for brake products according to claim 5, wherein When the left end surface of the shaft shoulder of the joint (5-5) is flush with the left end surface of the positioning seat (5-1), the spacing between the left end of the limiting ring and the inner end surface of the positioning cavity is L, which is used for reflecting the size of the axial force.

7. The vibration test loading device for brake products according to claim 5, wherein The right end of the adjusting nut (5-2) is marked with a scale line.

8. The vibration test loading device for a brake product according to claim 1, wherein Screw holes (1-1) are formed in the bottom plate (1) and connected with the screw holes of the vibration table, which are used for transmitting the energy of the vibration table.

9. A method of loading a vibration test for a brake product, characterized by, The device of any one of claims 1-8 is used, and the method comprises: The flange hole at the two ends of the brake is fixed with the left support (3) and the right support (4) through the fastening screw (7), the washer (8) and the nut (9) and is fixed on the bottom plate (1) through the bolt (6); The right end inner spline of the driving mechanism (2) is connected with the outer spline of the input end of the brake, and the left end inner spline is connected with the motor flexible shaft, which is fixed on the bottom plate (1) through the bolt (6); The left end inner spline of the thrust mechanism (5) is connected with the outer spline of the output end of the brake, and the end surface is in contact state, the spring compression amount is adjusted to make the thrust mechanism (5) provide a preset axial force, and the thrust mechanism (5) is fixed on the bottom plate (1) through the bolt (6); The sensor support (10) fixes the eddy current sensor probe through double nuts; The motor and the vibration table are started, and the belt vibration test of the brake in three working states is completed according to the test procedure.

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