Double-table-board vibration test device

Abstract

The utility model relates to the technical field of vibration test devices, and particularly discloses a double-tabletop vibration test device which comprises a vibration table and an auxiliary sliding table, the auxiliary sliding table comprises a sliding assembly, an adjusting assembly and a supporting assembly, the supporting assembly is fixedly connected with the adjusting assembly, and the sliding assembly is fixedly connected to the end, away from the supporting assembly, of the adjusting assembly. The adjusting assembly is used for vertically adjusting the height of the sliding assembly, and the supporting assembly is fixed to the ground. The vibration table is fixedly connected with one end of a tested product, and the sliding assembly is fixedly connected with one end, away from the vibration table, of the tested product and used for synchronously vibrating along with the tested product. According to the auxiliary sliding table, the mounting table surface of the vibration table is expanded, so that a tested product with the length of more than 3 meters can complete a high-magnitude vibration test under the condition that the thrust of the existing vibration table is not changed; and the auxiliary sliding table is convenient to disassemble and transfer and can be matched with different vibration tables for use, the original vibration table does not need to be replaced, and the cost is saved.

Description

Technical Field

[0001] This application relates to the technical field of vibration testing apparatus, and in particular to a dual-table vibration testing apparatus. Background Technology

[0002] In fields such as aerospace, rail transportation, and large-scale machinery, structural test products often face complex, high-level vibration environments during use. Their mechanical properties and resistance to damage directly affect the reliability and safety of the overall equipment. Therefore, it is necessary to conduct high-level vibration tests on the test products to study their mechanical properties and resistance to damage in high-level vibration environments.

[0003] In related technologies, conventional high-level vibration test methods involve subjecting the product to random vibration tests with a total root mean square acceleration of 20g in the 5-2000Hz frequency band, and the vibration direction must be along the length of the product.

[0004] However, the traditional vibration table has limited table size, making it difficult to meet the installation requirements of test products with a length exceeding 3 meters; if the table size is increased to meet the length requirements of the test product, a huge thrust is required to meet the vibration requirement of 20 Grms. Utility Model Content

[0005] In order to conduct high-level vibration tests on test products with a length exceeding 3 meters, this application provides a dual-table vibration testing device that can meet the requirement that the size of the vibration table is larger than the size of the test product, while maintaining a certain thrust to meet the vibration requirement of 20 Grms.

[0006] This application provides a dual-platform vibration testing device, which adopts the following technical solution:

[0007] A dual-table vibration testing device includes a vibration table and an auxiliary slide table. The auxiliary slide table includes a sliding component, an adjusting component, and a supporting component. The supporting component is fixedly connected to the adjusting component, and the sliding component is fixedly connected to the end of the adjusting component away from the supporting component. The adjusting component is used to vertically adjust the height of the sliding component, and the supporting component is fixed to the ground. The vibration table is fixedly connected to one end of the test product, and the sliding component is fixedly connected to the end of the test product away from the vibration table. The sliding component is used to vibrate synchronously with the test product.

[0008] By adopting the above technical solution, one end of the test product is fixed to the vibration table, and the other end is fixed to the auxiliary slide. The two ends of the test product are made to be at the same horizontal height by adjusting the components, with the middle of the test product suspended in the air. The vibration table applies vibration excitation to drive the test product to vibrate. The test product transmits the excitation to the auxiliary slide through its own structure, and the auxiliary slide vibrates synchronously with the test product. The auxiliary slide expands the mounting surface of the vibration table, so that test products with a length of more than 3 meters can meet the thrust requirements of high-level vibration and complete high-level vibration tests under the condition that the thrust of the existing vibration table remains unchanged. In addition, the auxiliary slide is easy to disassemble and move, and can be used with different vibration tables without replacing the original vibration table, thus saving costs.

[0009] Optionally, the support assembly includes a top plate, a bottom plate, vertical plates, and a fixing plate. The top plate and the bottom plate are arranged in parallel, and at least two vertical plates are provided. The vertical plates are vertically welded between the top plate and the bottom plate. The top plate is fixedly connected to the adjustment assembly, and the bottom plate is fixed to the ground by the fixing plate.

[0010] By adopting the above technical solution, the welding and fixing of the top plate, bottom plate and vertical plate provides high-strength support, which can resist the lateral torque during vibration transmission, so that the auxiliary slide is stably fixed to the ground.

[0011] Optionally, the adjustment assembly includes a lifting plate and a locking member. The lifting plate is arranged parallel to the top plate and is fixedly connected to the sliding assembly. The locking member passes through the lifting plate and is fixed to the top plate. Multiple locking members are provided and distributed along the periphery of the lifting plate. The locking members are used to adjust and fix the distance between the lifting plate and the top plate.

[0012] By adopting the above technical solution, the locking components are adjusted to adjust the distance between the lifting plate and the top plate, thereby adjusting the position of the sliding component so that both ends of the product are on the same horizontal plane, ensuring the transmission of vibration excitation; multiple locking components can ensure that the lifting plate is subjected to balanced force and maintains a horizontal state.

[0013] Optionally, the locking element is a double-nut adjusting bolt, comprising:

[0014] An adjusting bolt passes through the lifting plate and the top plate, with the nut of the adjusting bolt abutting against the upper surface of the lifting plate;

[0015] The first nut is screwed onto the adjusting bolt and abuts against the lower surface of the lifting plate;

[0016] The second nut is screwed onto the adjusting bolt and abuts against the upper surface of the top plate.

[0017] By adopting the above technical solution, when the height needs to be adjusted, the adjusting bolt is rotated to adjust the position of the adjusting bolt in the top plate and tightened by the second nut to realize the adjustment of the distance between the lifting plate and the top plate, thereby changing the height of the sliding component to the required height, so that the two ends of the product are on the same horizontal plane.

[0018] Optionally, the sliding component includes a platform and a guide structure. The guide structure is fixed to the lifting plate and is used to support and guide the platform. The platform is fixedly connected to the end of the guide structure away from the adjustment component. The platform is fixedly connected to the test product and can vibrate synchronously with the test product along its length.

[0019] By adopting the above technical solution, the guide structure provides fixed support to the platform and simultaneously guides and limits its movement, enabling the platform to vibrate synchronously with the test product along its length, thus avoiding measurement errors caused by vibration deviation.

[0020] Optionally, the sliding assembly has a limiting structure on its side wall. The limiting structure includes a first fixed seat, a second fixed seat, and a support rod. The first fixed seat is fixedly connected to the side wall of the table, and the second fixed seat is fixedly connected to the side wall of the guide structure. One end of the support rod is installed in the first fixed seat, and an elastic rubber ring is fixedly installed between the support rod and the first fixed seat. The other end of the support rod is ball-jointed to the second fixed seat.

[0021] By adopting the above technical solution, the limiting structure can further restrict the vibration direction of the platform, so that the platform vibrates along the length direction of the test product, and the limiting structure has an auxiliary support function for the platform; if the control system malfunctions, it can be shut down in an emergency by hardware, increasing the safety of use.

[0022] Optionally, the support rod is provided in multiple parts, and the multiple support rods are evenly distributed between the first fixed seat and the second fixed seat along the moving direction of the platform.

[0023] By adopting the above technical solution, multiple support rods further ensure the vibration direction of the platform during vibration, reducing vibration deviation.

[0024] Optionally, two limiting structures are provided, and the two limiting structures are respectively fixedly installed on opposite sides of the sliding component.

[0025] By adopting the above technical solution, the two-sided limiting structure can further restrict the vibration displacement and direction of the platform and improve the safety of use.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. One end of the test product is fixed to the vibration table, and the other end is fixed to the auxiliary slide. The two ends of the test product are made to be at the same horizontal height by adjusting the components, with the middle of the test product suspended in the air. The vibration table applies vibration excitation to drive the test product to vibrate. The test product transmits the excitation to the auxiliary slide through its own structure, and the auxiliary slide vibrates synchronously with the test product. The auxiliary slide expands the mounting surface of the vibration table, so that test products with a length of more than 3 meters can meet the thrust requirements of high-level vibration and complete high-level vibration tests under the condition that the thrust of the existing vibration table remains unchanged. In addition, the auxiliary slide is easy to disassemble and move, and can be used with different vibration tables without replacing the original vibration table, saving costs.

[0028] 2. By setting up a guide structure, the platform is both fixedly supported and guided and limited, so that the platform can vibrate synchronously with the test product along the length of the test product, avoiding measurement errors caused by vibration deviation.

[0029] 3. By setting a limiting structure, the vibration direction of the platform can be further restricted, so that the platform vibrates along the length of the test product, and the limiting structure provides auxiliary support for the platform; if the control system malfunctions, it can be shut down in an emergency by hardware, increasing the safety of use. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the auxiliary slide in this application;

[0032] Figure 3 This is a schematic diagram of the structure that highlights the limiting structure and adjustment components in this application.

[0033] Reference numerals: 1. Vibration table; 2. Auxiliary slide; 21. Sliding assembly; 211. Table surface; 212. Guide structure; 213. Threaded hole; 214. Limiting structure; 2141. First fixed seat; 2142. Second fixed seat; 2143. Support rod; 22. Adjustment assembly; 221. Lifting plate; 222. Locking element; 2221. Adjusting bolt; 2222. First nut; 2223. Second nut; 23. Support assembly; 231. Top plate; 232. Bottom plate; 233. Vertical plate; 234. Fixed plate; 3. Test product. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0035] This application discloses a double-platform vibration testing device, referring to... Figure 1The test setup includes a vibration table 1 and an auxiliary slide 2. The distance between the auxiliary slide 2 and the vibration table 1 is adjusted, and one end of the test product 3 is fixedly mounted on the vibration table 1, while the other end is fixedly mounted on the auxiliary slide 2, leaving the middle of the test product 3 suspended. The vibration table 1 applies vibration excitation, causing the test product 3 to vibrate. The test product 3 transmits this vibration excitation to the auxiliary slide 2 through its own structure, and the auxiliary slide 2 vibrates synchronously with the test product 3, with the vibration direction along the length of the test product 3. By setting up the auxiliary slide 2, the mounting surface of the vibration table 1 is expanded, allowing test products 3 with a length exceeding 3 meters to undergo high-level vibration tests under the condition that the thrust of the existing vibration table 1 remains unchanged.

[0036] Reference Figure 1 and Figure 2 The auxiliary slide 2 includes a sliding component 21, an adjusting component 22, and a supporting component 23. The supporting component 23 is fixedly connected to the adjusting component 22. The sliding component 21 is fixedly connected to the end of the adjusting component 22 away from the supporting component 23, and the sliding component 21 is fixedly connected to the test product 3. The sliding component 21 can follow the vibration of the test product 3. The adjusting component 22 can vertically adjust the position of the sliding component 21 so that both ends of the test product 3 are on the same horizontal line.

[0037] The support assembly 23 includes a top plate 231, a bottom plate 232, a vertical plate 233, and a fixing plate 234. The top plate 231 and the bottom plate 232 are arranged in parallel. There are two vertical plates 233, which are vertically fixed between the top plate 231 and the bottom plate 232, and are arranged in parallel. The two ends of the vertical plates 233 are welded to the top plate 231 and the bottom plate 232, respectively. The end of the top plate 231 away from the vertical plate 233 is fixedly connected to the adjustment assembly 22, and the end of the bottom plate 232 away from the vertical plate 233 is fixedly connected to the fixing plate 234 by bolts. The fixing plate 234 is fixed to the ground.

[0038] Reference Figure 2 and Figure 3 The adjustment component 22 includes a lifting plate 221 and a locking member 222. The lifting plate 221 is arranged parallel to the top plate 231, and the locking member 222 passes through the lifting plate 221 and is fixed to the top plate 231. The sliding component 21 is fixedly installed at the center of the lifting plate 221. Multiple locking members 222 are provided and are evenly distributed along the periphery of the lifting plate 221. By adjusting the locking members 222, the distance between the lifting plate 221 and the top plate 231 is changed, thereby adjusting the height of the sliding component 21 so that the end of the test product 3 located on the vibration table 1 and the end located on the sliding component 21 are at the same horizontal height, ensuring the transmission of vibration excitation.

[0039] In this embodiment, the locking member 222 adopts a double-nut adjusting bolt, including an adjusting bolt 2221, a first nut 2222, and a second nut 2223. The adjusting bolt 2221 passes through the lifting plate 221 and the top plate 231 in sequence, and the nut of the adjusting bolt 2221 abuts against the upper surface of the lifting plate 221. The first nut 2222 is screwed on the adjusting bolt 2221 and abuts against the lower surface of the lifting plate 221, so that the lifting plate 221 is fixed on the adjusting bolt 2221. The second nut 2223 is screwed on the adjusting bolt 2221 and abuts against the upper surface of the top plate 231, realizing the adjustable connection between the adjusting bolt 2221 and the top plate 231. When the height needs to be adjusted, rotate the adjusting bolt 2221 to adjust the position of the adjusting bolt 2221 in the top plate 231 and tighten it by the second nut 2223 to adjust the distance between the lifting plate 221 and the top plate 231, thereby changing the height of the sliding component 21 to the required height; during the adjustment process, a level needs to be used to ensure that the lifting plate 221 is in a horizontal position.

[0040] The sliding assembly 21 includes a platform 211 and a guide structure 212. The platform 211 is mounted on the end of the guide structure 212 away from the support plate. The guide structure 212 provides support and guidance for the platform 211, enabling the platform 211 to vibrate synchronously with the test product 3 in the direction of its length. The platform 211 has multiple threaded holes 213 for threading bolts to detachably connect to the end of the test product 3 away from the vibration table 1.

[0041] In this embodiment, the guide structure 212 uses a linear sliding guide rail to support and guide the platform 211. The slide rail of the linear sliding guide rail is fixedly installed inside the guide structure 212, and the slider is fixedly connected to the platform 211 by bolts. The sliding direction of the slider on the slide rail is consistent with the length direction of the test product 3, so that the platform 211 can only follow the test product 3 to vibrate along the length direction of the test product 3. Lubricating oil is injected between the slider and the slide rail to reduce the coefficient of friction and make the vibration of the platform 211 smoother.

[0042] To further limit the vibration displacement of the platform 211, a limiting structure 214 is also provided on the side wall of the sliding assembly 21. The limiting structure 214 includes a first fixed seat 2141, a second fixed seat 2142, and a support rod 2143. The first fixed seat 2141 is fixedly connected to the side wall of the platform 211 by bolts, and the second fixed seat 2142 is fixedly connected to the side wall of the guide structure 212 by bolts. The first fixed seat 2141 and the second fixed seat 2142 are located on the same side of the sliding assembly 21. One end of the support rod 2143 is installed in the first fixed seat 2141, and an elastic rubber ring is fixedly installed between the support rod 2143 and the first fixed seat 2141. The other end of the support rod 2143 is ball-jointed to the second fixed seat 2142. There are four support rods 2143, which are evenly distributed between the first fixed seat 2141 and the second fixed seat 2142 along the moving direction of the platform 211.

[0043] Two limiting structures 214 are provided, and the two limiting structures 214 are fixedly installed on opposite sides of the sliding component 21 respectively; if the control system malfunctions, it can be stopped by hardware emergency, increasing the safety of use. At the same time, the limiting structures 214 provide auxiliary support for both ends of the table 211.

[0044] An accelerometer and a frequency sensor were attached to the test product 3. The accelerometer and the frequency sensor were electrically connected to an external control system.

[0045] During the test, the auxiliary slide 2 is first assembled and placed on one side of the vibration table 1. The distance between the auxiliary slide 2 and the vibration table 1 is adjusted to meet the size requirements for fixing the two ends of the test product 3. Then, one end of the test product 3 is fixedly connected to the vibration table 1, and the other end is fixedly connected to the threaded hole 213 on the table surface 211 by bolts. The two ends of the test product 3 are then adjusted by adjusting the adjusting bolt 2221 to ensure that they are at the same horizontal level. Next, acceleration sensors and frequency sensors are attached to both ends of the test product 3 and connected to an external control system. The vibration excitation source of the vibration table 1 is turned on in conjunction with the control system to complete a high-level vibration test on the test product 3.

[0046] The implementation principle of the dual-table vibration testing device disclosed in this application is as follows: the vibration table 1 applies vibration excitation to drive the test product 3 to vibrate. The test product 3 transmits the excitation to the auxiliary slide table 2 through its own structure. The table surface 211 vibrates synchronously with the test product 3, and the vibration direction is along the length direction of the test product 3. By setting the auxiliary slide table 2, the mounting surface of the vibration table 1 is expanded, so that the test product 3 with a length of more than 3 meters can meet the thrust requirements of high-level vibration and complete the high-level vibration test under the condition that the thrust of the existing vibration table 1 remains unchanged. In addition, the auxiliary slide table 2 is easy to disassemble and move, and can be used with different vibration tables 1. The original vibration table 1 does not need to be replaced, saving costs.

[0047] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-plate vibration testing apparatus, characterized by comprising: The device includes a vibration table (1) and an auxiliary slide table (2). The auxiliary slide table (2) includes a sliding component (21), an adjustment component (22), and a support component (23). The support component (23) is fixedly connected to the adjustment component (22). The sliding component (21) is fixedly connected to the end of the adjustment component (22) away from the support component (23). The adjustment component (22) is used to vertically adjust the height of the sliding component (21). The support component (23) is fixed to the ground. The vibration table (1) is fixedly connected to one end of the test product (3). The sliding component (21) is fixedly connected to the end of the test product (3) away from the vibration table (1). The sliding component (21) is used to vibrate synchronously with the test product (3).

2. The dual flat-pendulum vibration testing apparatus according to claim 1, wherein The support assembly (23) includes a top plate (231), a bottom plate (232), a vertical plate (233), and a fixing plate (234). The top plate (231) and the bottom plate (232) are arranged in parallel. There are at least two vertical plates (233), which are vertically welded between the top plate (231) and the bottom plate (232). The top plate (231) is fixedly connected to the adjustment assembly (22), and the bottom plate (232) is fixed to the ground by the fixing plate (234).

3. The dual flat-pendulum vibration testing apparatus according to claim 2, wherein The adjustment component (22) includes a lifting plate (221) and a locking member (222). The lifting plate (221) is arranged parallel to the top plate (231). The lifting plate (221) is fixedly connected to the sliding component (21). The locking member (222) passes through the lifting plate (221) and is fixed to the top plate (231). There are multiple locking members (222), which are distributed around the periphery of the lifting plate (221). The locking members (222) are used to adjust and fix the distance between the lifting plate (221) and the top plate (231).

4. The dual flat-pendulum vibration testing apparatus according to claim 3, wherein The locking element (222) is a double-nut adjusting bolt (2221), comprising: An adjusting bolt (2221) passes through the lifting plate (221) and the top plate (231), and the nut of the adjusting bolt (2221) abuts against the upper surface of the lifting plate (221); The first nut (2222) is screwed onto the adjusting bolt (2221) and abuts against the lower surface of the lifting plate (221); The second nut (2223) is screwed onto the adjusting bolt (2221) and abuts against the upper surface of the top plate (231).

5. The dual flat-pendulum vibration testing apparatus according to claim 3, wherein The sliding component (21) includes a platform (211) and a guide structure (212). The guide structure (212) is fixed to the lifting plate (221) and is used to support and guide the platform (211). The platform (211) is fixedly connected to the end of the guide structure (212) away from the adjustment component (22). The platform (211) is fixedly connected to the test product (3). The platform (211) can follow the test product (3) and vibrate synchronously along the length direction of the test product (3).

6. The dual flat-pendulum vibration testing apparatus according to claim 4, wherein The sliding assembly (21) has a limiting structure (214) on its side wall. The limiting structure (214) includes a first fixed seat (2141), a second fixed seat (2142), and a support rod (2143). The first fixed seat (2141) is fixedly connected to the side wall of the table (211), and the second fixed seat (2142) is fixedly connected to the side wall of the guide structure (212). One end of the support rod (2143) is installed in the first fixed seat (2141), and an elastic rubber ring is fixedly installed between the support rod (2143) and the first fixed seat (2141). The other end of the support rod (2143) is ball-jointed to the second fixed seat (2142).

7. The dual flat-pendulum vibration testing apparatus according to claim 6, wherein The support rod (2143) is provided in multiple parts, and the multiple support rods (2143) are evenly distributed between the first fixed seat (2141) and the second fixed seat (2142) along the moving direction of the platform (211).

8. The dual flat-pendulum vibration testing apparatus according to claim 6, wherein Two limiting structures (214) are provided, and the two limiting structures (214) are respectively fixedly installed on opposite sides of the sliding component (21).

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