Vibration and extrusion composite test device
By designing a vibration and extrusion composite test device that combines the excitoter, the static extrusion structure and the dynamic squeezing structure, the problem that the existing technology cannot simulate the vibration and squeeze composite environment is solved, and the reliability of product reliability is realized. Effectively improve.
Patent Information
- Application Number
- CN202411405378.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-01-28
AI Technical Summary
The prior art cannot effectively simulate the mechanical conditions of the product in the vibration and extrusion composite environment, resulting in insufficient reliability of the product in practical applications.
Design a vibration and squeezing composite test device, combined with the excitoter, static extrusion structure and dynamic extrusion structure, and realize the constant static extrusion and change dynamic squeezing of the test parts through the hydraulic cylinder and storage device in the vibration process. Essence
The actual use conditions of the simulated product in the composite mechanical environment are performed at the same time in the vibration test, which improves the reliability of the product.
Smart Images
Figure CN119375040A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of vibration testing, and in particular to a vibration and extrusion composite testing device. Background Art
[0002] In modern industrial design, verifying the reliability of a product is one of the key steps to ensure its stable operation in actual applications. For many products, their use environment is not just static, but contains a combination of multiple mechanical conditions. For example, the simultaneous effects of vibration and static load that may be encountered during transportation. Therefore, test equipment that can truly simulate these complex environments is particularly important. According to the latest market research data, more than 60% of product failures are caused by environmental stress, which emphasizes the importance of composite environment simulation.
[0003] There are already some equipment on the market that can perform vibration tests and extrusion tests separately, but for the test needs that need to simulate vibration and extrusion composite environments at the same time, this demand cannot be met for the time being. Summary of the invention
[0004] The purpose of the present invention is to solve the above problems in the prior art and to propose a vibration and extrusion composite test device.
[0005] To achieve the above object, the following technical scheme can be used: a vibration and extrusion composite test device, comprising a support structure, an exciter arranged on the support structure, a static extrusion structure for applying static extrusion to a test piece, and a load for applying dynamic extrusion to the test piece, wherein the test piece is arranged on the exciter;
[0006] The static extrusion structure includes a hydraulic cylinder for applying a static extrusion force to the test piece and a pressing table connected to the hydraulic cylinder. The hydraulic cylinder drives the pressing table to move linearly in a direction close to or away from the test piece to adjust the static extrusion force on the test piece. The extrusion direction of the hydraulic cylinder on the test piece is consistent with the vibration direction of the exciter.
[0007] During the vibration process, the static extrusion pressure of the test piece is constant, while the dynamic extrusion pressure changes.
[0008] More specifically, the hydraulic cylinder includes an upper oil cylinder and a lower oil cylinder, the upper oil cylinder is connected to an upper oil chamber accumulator, and the lower oil cylinder is connected to a lower oil chamber accumulator.
[0009] More specifically, the hydraulic cylinder is arranged on a support structure.
[0010] More specifically, the hydraulic cylinder is arranged on the extension table.
[0011] More specifically, the dynamic extrusion structure includes an adjustable load, and the adjustable load is arranged on the pressing table.
[0012] More specifically, four hydraulic cylinders are provided, and the four hydraulic cylinders are evenly arranged around the vibrator.
[0013] More specifically, each of the hydraulic cylinders is connected to two accumulators.
[0014] More specifically, a guide member is provided on the support structure, and the pressing table can move up and down along the guide member.
[0015] More specifically, four guide members are provided, and the four guide members are evenly arranged around the pressing table.
[0016] More specifically, the guide member is configured as a guide shaft, a guide hole is provided on the pressing table, and the guide shaft is disposed in the guide hole.
[0017] More specifically, the bottom of the hydraulic cylinder is connected to the support structure, and the top of the hydraulic cylinder is connected to the pressing table.
[0018] More specifically, the vibration exciter is configured as a hydraulic table, an electric table or a mechanical table.
[0019] The vibration and extrusion composite test device of the present invention can achieve the following technical effects:
[0020] An exciter, a static extrusion structure and a load are set at the same time. The exciter performs a vibration test on the test piece, the static extrusion structure and the load can provide extrusion pressure. The static extrusion structure provides a constant extrusion pressure for the test piece, and the load provides the test piece with an extrusion pressure that changes during the vibration process. This device can make the test piece perform an extrusion test while performing a vibration test, thereby simulating the composite mechanical environment of the product subjected to vibration and extrusion, and improving the reliability of the product through such comprehensive mechanical tests. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the vibration test bench of the present invention;
[0022] Figure 2 It is a schematic diagram of the main structure of the vibration test bench of the present invention;
[0023] In the figure: 1. bracket structure; 2. exciter; 3. extension table; 4. test piece; 5. hydraulic cylinder; 6. guide shaft; 71. upper oil chamber accumulator; 72. lower oil chamber accumulator; 8. clamping table; 81. reinforcement; 9. load. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings.
[0026] A vibration and extrusion composite test device, such as Figure 1 , Figure 2 As shown, it includes a support structure 1 and an exciter 2 arranged on the support structure 1. The support structure 1 is set as a base, and the base is set on the ground for fixing the exciter 2. The exciter 2 is set in the middle of the base, so that the fixation is more reliable. The exciter 2 is on the base, and an extended table 3 is set on the exciter 2. The test piece 4 is set on the extended table 3. The exciter 2 is started to perform a vibration test on the test piece 4.
[0027] The vibration exciter 2 is configured as a hydraulic table, an electric table or a mechanical table.
[0028] In order to perform the extrusion test while performing the vibration test, the vibration and extrusion composite test device also includes a static extrusion structure and a dynamic extrusion structure. The static extrusion structure is used to apply a static extrusion force to the test piece 4, which does not change during the vibration process and is applied before the vibration process. The dynamic extrusion structure is used to apply a dynamic extrusion force to the test piece 4, which changes during the vibration process. Both the static extrusion force and the dynamic extrusion force can be adjusted.
[0029] The static extrusion structure includes a hydraulic cylinder 5 and a pressing table 8 connected to the hydraulic cylinder 5. The pressing table 8 is located above the test piece 4. The hydraulic cylinder 5 drives the pressing table 8 to move linearly toward or away from the test piece 4 to adjust the static extrusion force on the test piece 4. The extrusion direction of the hydraulic cylinder 5 on the test piece 4 is consistent with the vibration direction of the exciter 2, that is, when the vibration direction of the exciter 2 is horizontal, the hydraulic cylinder 5 applies static extrusion force to the test piece 4 in the horizontal direction, and when the vibration direction of the exciter 2 is vertical, the hydraulic cylinder 5 applies static extrusion force to the test piece 4 in the vertical direction.
[0030] There are two locations for the hydraulic cylinder 5: the hydraulic cylinder 5 is arranged on the support structure 1 or on the extended table 3.
[0031] When the hydraulic cylinder 5 is set on the extended table 3, the hydraulic cylinder 5 vibrates simultaneously with the vibrator 2, and no other structure is required, which can ensure that the hydraulic cylinder 5 has the same extrusion force on the test piece 4 at any time and is constant at a value. However, setting the hydraulic cylinder 5 on the extended table 3 also means that the hydraulic cylinder 2 performs a vibration test together with the test piece 4. If the hydraulic cylinder 5 used is of poor quality, it may be damaged before the test piece 4, and the extrusion test on the test piece 4 cannot be completed. At the same time, the hydraulic cylinder 5 and the test piece 4 are set on the extended table 3 at the same time. In order to adapt to the strength of the extended table 3, the maximum mass that can be tested by the test piece 4 will become smaller, the vibration frequency response will become smaller, and the vibration frequency will also become smaller; if the maximum mass that can be tested by the test piece 4 is to be guaranteed, the mass of the extended table 3 needs to be increased. At this time, the overall mass on the vibrator 2 will become larger, so the vibration acceleration will also become smaller.
[0032] When the hydraulic cylinder 5 is arranged on the support structure 1, that is, when it is arranged on the base, the overall mass will not be increased, and the vibration acceleration and vibration frequency of the exciter 2 will be guaranteed. However, other structures need to be set to ensure that during the vibration process, the squeezing pressure of the hydraulic cylinder 5 on the test piece 4 remains unchanged. In this scheme, this structure is adopted, and an accumulator is set at the same time to ensure that the squeezing pressure of the hydraulic cylinder 5 on the test piece 4 remains unchanged.
[0033] The bottom of the cylinder body of the hydraulic cylinder 5 is connected to the base, and the top of the piston rod of the hydraulic cylinder 5 is connected to the clamping table 8. Furthermore, the setting of the hydraulic cylinder 5 needs to make the clamping table 8 exert a uniform pressure on the test piece 4, so a plurality of hydraulic cylinders 5 are provided, and the plurality of hydraulic cylinders 5 are evenly arranged around the clamping table 8, and the plurality of hydraulic cylinders 5 synchronously drive the clamping table 8 to move toward or away from the test piece 4, so as to ensure synchronization of the pressure exerted on the test piece 4. At the same time, because the hydraulic cylinders 5 are evenly arranged, the static pressure exerted on the test piece 4 by the entire clamping table 8 is uniform.
[0034] Furthermore, four hydraulic cylinders 5 are provided, and the four hydraulic cylinders 5 are respectively provided at the four corners of the pressing table 8. Of course, six or eight hydraulic cylinders 5 can also be provided to ensure that the pressing force on the test piece 4 is uniform.
[0035] The hydraulic cylinder 5 drives the clamping table 8 to apply an extrusion force to the test piece 4, which is the static extrusion force on the test piece 4. The static extrusion force on the test piece 4 is adjusted by setting the oil pressure in the hydraulic cylinder 5. The static extrusion force on the test piece 4 is changed by changing the oil pressure in the hydraulic cylinder 5.
[0036] The hydraulic cylinder 5 is arranged on the support structure 2. When the test piece 4 is subjected to the vibration test, the piston rod of the hydraulic cylinder 5 cannot passively vibrate with the exciter 2. In order to ensure that the test piece 4 is subjected to the extrusion test while the vibration test is performed, the piston rod of the hydraulic cylinder 5 needs to move up and down in the cylinder body when the exciter 2 vibrates to realize the passive vibration of the piston rod. One hydraulic cylinder 5 is connected to two accumulators.
[0037] Furthermore, the hydraulic cylinder 5 includes an upper oil chamber and a lower oil chamber, the upper oil chamber is connected to the upper oil chamber accumulator 71, and the lower oil chamber is connected to the lower oil chamber accumulator 72. When the piston rod follows the vibration exciter 2 to perform a vibration test, the hydraulic oil in the upper and lower oil chambers in the hydraulic cylinder 5 can freely enter and exit the accumulator to ensure the passive vibration of the piston rod. In this solution, four hydraulic cylinders 5 are provided, each of which is connected to the upper oil chamber accumulator 71 and the lower oil chamber accumulator 72.
[0038] In order to prevent the horizontal displacement of the pressing table 8 when it moves up and down, resulting in uneven static extrusion pressure on the test piece 4, a guide member is provided on the base. The guide member can be set to any structure that can ensure the linear movement of the pressing table 8. In this solution, the guide member is set to a guide shaft 6. There are a number of guide shafts 6, and the guide shafts 6 are evenly arranged around the pressing table 8. In this solution, there are four guide shafts 6, and the four guide shafts 6 are respectively arranged at the four corners of the pressing table 8. The guide shaft 6 is arranged at the same position as the hydraulic cylinder 5, that is, a hydraulic cylinder 5 and a guide shaft 6 are arranged at each corner of the pressing table 8. The guide shaft 6 ensures that the hydraulic cylinder 5 drives the pressing table 8 vertically, thereby avoiding uneven static extrusion pressure on the test piece 4.
[0039] Guide holes are provided on the pressing table 8 according to the positions and number of the guide shafts 6 , and the guide shafts 6 are arranged in the guide holes. When the hydraulic cylinder 5 drives the pressing table 8 to move up and down, the pressing table 8 moves along the guide shafts 6 .
[0040] The dynamic extrusion structure includes a load 9, which is arranged on the pressing table 8. The load 9 can be set as a standard part, for example, a plurality of loads 9 are arranged, each of which has the same mass, and the number of loads 9 is increased or decreased according to the required dynamic extrusion force; or a plurality of loads 9 with different masses can be arranged, and loads 9 with different masses can be placed according to the required dynamic extrusion force. During the vibration test, the acceleration of the load arranged on the exciter changes, but the mass remains unchanged, so the extrusion force of the load on the test piece will change. Therefore, the extrusion force of the dynamic extrusion structure on the test piece will change during the vibration process. Reinforcement ribs are arranged on the pressing table 8 to enhance the strength of the pressing table 8, so as to avoid the insufficient strength of the pressing table 8 or the bending of the pressing table 8 when the weight of the load 9 is large. The load 9 is arranged on the reinforcement ribs and fixed to the reinforcement ribs by screws to avoid the load 9 falling during the vibration test.
[0041] The guide shaft 6 is set on the base and protrudes through the clamping table 8. Because it is necessary to meet the requirements of placing different test pieces 4 on the clamping table 8 and the extension table 3, the guide shaft 6 is set longer, and there may be a situation where the guide shaft 6 protrudes from the clamping table 8. The load 9s is set between the four guide shafts 6. The four guide shafts 6 surround the load 9 to enclose the load 9 and position the load 9 to facilitate fixation with the reinforcing ribs. Therefore, the height of the guide shaft 6 needs to be ensured to be higher than the load 9.
[0042] The mass of the load 9 and the clamping table 8 and the vibration level of the exciter 2 jointly determine the magnitude of the dynamic extrusion force exerted on the test piece 4. When the vibration level is constant, the magnitude of the dynamic extrusion force exerted on the test piece 4 can be adjusted by replacing the load 9. The larger the load is adjusted, the greater the dynamic extrusion force exerted.
[0043] The hydraulic cylinder 5 is extended and retracted to apply static extrusion pressure, and the load 9 is replaced to apply dynamic extrusion pressure during vibration. The extrusion pressure of the composite test device is a dynamic extrusion pressure applied simultaneously on the basis of static extrusion pressure, and the magnitudes of the two extrusion pressures can be adjusted, which better meets the larger range of vibration and extrusion composite tests on the market, simulates the composite mechanical environment of the product subjected to vibration and extrusion, and improves the reliability of the product through such comprehensive mechanical tests.
[0044] The working process of the vibration and extrusion composite test device is as follows:
[0045] The four hydraulic cylinders 5 are controlled to synchronously drive the clamping table 8 to move toward the side away from the extension table 3. After a certain distance is left between the extension table 3 and the clamping table 8, the test piece 4 is placed on the extension table 3. According to the static extrusion force that the test piece 4 needs to be subjected to, the hydraulic cylinders 5 are controlled to drive the clamping table 8 to move along the guide shaft 6 toward the direction close to the test piece 4 to extrude the test piece 4. The driving direction of the hydraulic cylinders 5 is the same as the vibration direction of the exciter 2, that is, when the exciter 2 vibrates horizontally, the hydraulic cylinders 5 move linearly in the horizontal direction, and when the exciter 2 vibrates vertically, the hydraulic cylinders 5 move linearly in the vertical direction. Since the mass of the clamping table 8 is fixed, the The vibration magnitude of the exciter 2 is constant. According to the needs of the test piece 4, a load 9 of a certain mass is placed, and the load 9 is placed on the reinforcing ribs of the clamping table 8, and the load 9 is fixed to prevent it from falling off during the vibration process. The extrusion pressure on the test piece 4 is adjusted by adjusting the static extrusion pressure and the dynamic extrusion pressure. After the extrusion pressure on the test piece 4 is adjusted, the exciter 2 is started. During the vibration process, the accumulator is driven to adjust the oil pressure in the hydraulic cylinder 5 to ensure that the static extrusion pressure on the test piece 4 is constant during the vibration process. The extrusion pressure of the load 9 on the test piece 4 will change during the vibration process, and the vibration and extrusion test of the test piece 4 is completed.
[0046] The vibration and extrusion composite test device of the present invention can achieve the following technical effects:
[0047] The vibrator 2, the static extrusion structure and the dynamic extrusion structure are provided at the same time. The vibrator 2 performs a vibration test on the test piece 4. The extrusion force of the static extrusion structure on the test piece 4 does not change during the vibration process, while the extrusion force of the dynamic extrusion structure on the test piece 4 changes during the vibration process. The changing extrusion force and the unchanged extrusion force during the vibration process jointly perform an extrusion test on the test piece 4. This device can make the test piece 4 perform an extrusion test while performing a vibration test. A guide shaft 6 is provided to prevent the clamping table 8 from shifting in the horizontal direction, which would cause uneven extrusion of the test piece 4. Each of the hydraulic cylinders 5 is connected to two accumulators, so that when the vibrator 2 vibrates, the piston rod of the hydraulic cylinder 5 follows the vibration. Reinforcing ribs are provided on the clamping table 8 to prevent the clamping table from being insufficiently strong or bending.
[0048] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.
[0050] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.
Claims
1. A vibration and extrusion composite test device, characterized in that: The invention comprises a support structure (1), an exciter (2) arranged on the support structure (1), a static extrusion structure for applying static extrusion to a test piece (4), and a load for applying dynamic extrusion to the test piece (4); the test piece (4) is arranged on an extended table (3) of the exciter (2); The static extrusion structure comprises a hydraulic cylinder (5) for applying a static extrusion force to a test piece (4) and a pressing table (8) connected to the hydraulic cylinder (5); the hydraulic cylinder (5) drives the pressing table (8) to move linearly in a direction approaching or away from the test piece (4) to adjust the static extrusion force on the test piece (4); the extrusion direction of the hydraulic cylinder (5) on the test piece (4) is consistent with the vibration direction of the exciter (2).
2. The vibration and extrusion composite test device according to claim 1, characterized in that: The hydraulic cylinder (5) is arranged on the support structure (1).
3. The vibration and extrusion composite test device according to claim 2 is characterized in that: The hydraulic cylinder (5) comprises an upper oil chamber and a lower oil chamber, the upper oil chamber is connected to an upper oil chamber accumulator (71), and the lower oil chamber is connected to a lower oil chamber accumulator (72).
4. The vibration and extrusion composite test device according to claim 1, characterized in that: The hydraulic cylinder (5) is arranged on the extended table top (3).
5. The vibration and extrusion composite test device according to claim 1 is characterized in that: The load (9) is arranged on the pressing table (8).
6. The vibration and extrusion composite test device according to claim 1, characterized in that: Four hydraulic cylinders (5) are provided, and the four hydraulic cylinders (5) are evenly arranged around the pressing table surface (8).
7. The vibration and extrusion composite testing device according to claim 1 is characterized in that: A guide member is arranged on the support structure (1), and the pressing table (8) can move up and down along the guide member.
8. The vibration and extrusion composite test device according to claim 7, characterized in that: Four guide members are provided, and the four guide members are evenly arranged around the pressing table (8).
9. The vibration and extrusion composite test device according to claim 7, characterized in that: The guide member is configured as a guide shaft (6), a guide hole is provided on the pressing table surface (8), and the guide shaft (6) is arranged in the guide hole.
10. The vibration and extrusion composite testing device according to claim 3, characterized in that: The bottom of the hydraulic cylinder (5) is connected to the support structure (1), and the top of the hydraulic cylinder (5) is connected to the pressing table (8).