Swing vibration composite test bench

Abstract

The invention provides a swing-vibration composite test bench, comprising a base, an exciting component and a vibration table top, wherein the exciting component is rotatably connected to the vibration table top and the base and applies a vibration force in a vertical direction to the vibration table top; a straightening component is arranged between the base and the vibration table top, comprising a straightening support and a swing arm, wherein the straightening support is arranged on the base, a first decoupling rotation mechanism is arranged at one end of the swing arm and connected to the straightening support, and a second decoupling rotation mechanism is arranged at the other end of the swing arm and connected to the vibration table top; the first decoupling rotation mechanism comprises a bracket and a first rotating shaft mounted on the bracket, wherein the axis of the first rotating shaft is parallel to a horizontal plane, an end of the swing arm is rotatably connected to the first rotating shaft, the swing arm can rotate perpendicular to the horizontal plane around the first decoupling rotation mechanism along with the vibration table top, a horizontal deflection compensation component is arranged on the bracket, and is used to enable the swing arm to rotate in a horizontal direction, and the vibration table top rotates in a horizontal direction along with the swing arm while performing vertical reciprocating vibration.

Description

Technical Field

[0001] The invention relates to the technical field of vibration test benches, and in particular to a swing vibration composite test bench. Background Art

[0002] Vibration test is a typical test of environmental mechanical test, which is widely used in mechanical simulation verification and reliability verification of automobile parts, aerospace products, etc. Swing test is mainly used to simulate the environment installed on ships, seaplanes and other equipment, so as to conduct swing and tilt tests on various mechanical, electrical and electronic products to assess the harsh level of the products; or to test the adaptability of the main parts of automobiles to tilt and swing environments; or to conduct swing simulation tests on control rods in nuclear reactors to check their reliability and stability.

[0003] Usually, a considerable number of test pieces are placed in complex environments and need to undergo composite tests of vibration and swing at the same time, so as to more realistically simulate the actual mechanical environment of the product. Summary of the invention

[0004] The object of the present invention is to provide a rocking vibration composite test bench to solve the above problems.

[0005] The technical solution adopted by the present invention is:

[0006] A swing vibration composite test bench comprises a base, a vibration excitation component and a vibration table driven by the vibration excitation component, wherein the vibration excitation component comprises a hydraulic cylinder, the upper end of the hydraulic cylinder is rotatably connected to the vibration table, the lower end of the hydraulic cylinder is rotatably connected to the base, and the vibration excitation component can apply a vibration force in a vertical direction to the vibration table;

[0007] A righting assembly is provided between the base and the vibration table, the righting assembly comprises a righting support and a swing arm, the righting support is provided on the base, one end of the swing arm is provided with a first decoupling rotation mechanism connected to the righting support, and the other end of the swing arm is provided with a second decoupling rotation mechanism connected to the vibration table;

[0008] The structure of the first decoupling rotation mechanism is consistent with that of the second decoupling rotation mechanism. The first decoupling rotation mechanism includes a bracket and a first rotating shaft mounted on the bracket. The axis of the first rotating shaft is parallel to the horizontal plane. The end of the swing arm is rotatably connected to the first rotating shaft. The swing arm can rotate perpendicular to the horizontal plane around the first decoupling rotation mechanism along with the vibration table. A horizontal deflection compensation component is also provided on the bracket. The horizontal deflection compensation component is used to allow the swing arm to rotate in the horizontal direction. The vibration table rotates in the horizontal direction along with the swing arm while performing reciprocating vibration in the vertical direction.

[0009] As a further improved technical solution of the present invention, bearings are respectively sleeved on both ends of the first rotating shaft, and the bearings are arranged on a bracket.

[0010] As a further improved technical solution of the present invention, the horizontal deflection compensation member is an elastic ring, and the elastic ring is arranged between the outer cylindrical surface of the bearing and the bracket.

[0011] As a further improved technical solution of the present invention, a retaining ring is provided on a side of the bearing close to the end of the first rotating shaft.

[0012] As a further improved technical solution of the present invention, the straightening support is arranged perpendicular to the base, and the straightening support includes a vertical plate and two side plates arranged perpendicular to the vertical plate, the side plates are triangular, and the axis of the first rotating shaft is arranged parallel to the plane where the vertical plate is located.

[0013] As a further improved technical solution of the present invention, the vibration table includes a table main body and a connecting portion extending outward from the table main body, the connecting portion is used to connect a second decoupling rotation mechanism, and a yield portion is formed between the connecting portion and the table main body, and the yield portion is used to allow the vibration table to avoid the straightening component during movement.

[0014] As a further improved technical solution of the present invention, the two ends of the hydraulic cylinder are respectively connected to the base and the vibration table in the form of ball joints.

[0015] As a further improved technical solution of the present invention, a rotating mechanism is provided at both ends of the hydraulic cylinder, and the rotating mechanism includes a first rotating support, a second rotating shaft, a second rotating support and a third rotating shaft. The first rotating support is fixed on the base / vibration table, the second rotating shaft is mounted on the first rotating support, the second rotating support is fixed on the hydraulic cylinder, the third rotating shaft is mounted on the second rotating support, and the second rotating shaft and the third rotating shaft are an integrated cross-shaped structure.

[0016] As a further improved technical solution of the present invention, there are at least two righting assemblies.

[0017] As a further improved technical solution of the present invention, there are four excitation assemblies which are evenly distributed circumferentially, and there are four straightening assemblies which are evenly distributed circumferentially.

[0018] The beneficial effects of the present invention are:

[0019] Through the above structure, the excitation component is used to apply a vertical vibration force to the vibration table, and the straightening component is arranged to rotate in the vertical direction with the vertical vibration of the vibration table while driving the vibration table to rotate in the horizontal direction, thereby realizing a vibration and swing composite test on the specimen, with excellent test accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall structural schematic diagram of the swing vibration composite test bench;

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 It is a partial structural schematic diagram of the righting assembly;

[0023] Figure 4 is a cross-sectional view of the decoupled rotating mechanism;

[0024] Figure 5 It is a top view of the rocking vibration composite test bench.

[0025] Among them: 100-base, 210-hydraulic cylinder, 220-rotating mechanism, 221-first rotating support, 222-second rotating shaft, 223-second rotating support, 224-third rotating shaft, 300-vibrating table, 310-table body, 320-connecting part, 330-yielding part, 400-righting assembly, 410-righting support, 411-vertical plate, 412-side plate, 420-swing arm, 430-first decoupling rotating mechanism, 431-bracket, 432-first rotating shaft, 433-bearing, 434-elastic ring, 435-retaining ring, 440-second decoupling rotating mechanism. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0027] If the invention involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.) when describing, it is necessary to define the directions involved, such as "In order to clearly express the positions and directions described in the invention, the end close to the operator is the proximal end, and the end away from the operator is the distal end." Or define it with the paper as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, it does not need to be defined here.

[0028] A rocking vibration composite test bench, such as Figures 1 to 5 As shown, it includes a base 100, an excitation component and a vibration table 300 driven by the excitation component, which are arranged in sequence from bottom to top. The excitation component includes a hydraulic cylinder 210, and both ends of the hydraulic cylinder 210 are rotatably connected to the base 100 and the vibration table 300 respectively. The excitation component can apply a vibration force in the vertical axis direction to the vibration table 300.

[0029] A straightening assembly 400 is arranged between the base 100 and the vibration table 300, and the straightening assembly 400 includes a straightening support 410 and a swing arm 420. The straightening support 410 is arranged on the base 100, and one end of the swing arm 420 is provided with a first decoupling rotation mechanism 430 connected to the straightening support 410, and the other end of the swing arm 420 is provided with a second decoupling rotation mechanism 440 connected to the vibration table 300.

[0030] The first decoupling rotation mechanism 430 has the same structure as the second decoupling rotation mechanism 440. The first decoupling rotation mechanism 430 includes a bracket 431 and a first rotating shaft 432 mounted on the bracket 431. The axis of the first rotating shaft 432 is parallel to the horizontal plane. The end of the swing arm 420 is rotatably connected to the first rotating shaft 432. The swing arm 420 can rotate perpendicular to the horizontal plane around the first decoupling rotation mechanism 430 with the vibration table 300. A horizontal deflection compensation member is also provided on the bracket 431. The horizontal deflection compensation member is used to allow the swing arm 420 to rotate in the horizontal direction. The vibration table 300 rotates in the horizontal direction with the swing arm 420 while performing vertical reciprocating vibration. The first decoupling rotation mechanism 430 and the second decoupling rotation mechanism 440 are used to limit the freedom of movement of the vibration table 300 in the horizontal direction.

[0031] like Figure 3 As shown, bearings 433 are respectively sleeved on both ends of the first rotating shaft 432, and the bearings 433 are arranged on the bracket 431. The first rotating shaft 432 is mounted on the bracket 431 through the bearings 433 and can rotate on the bracket 431, so that the swing arm 420 rotates.

[0032] like Figure 4 As shown, the horizontal deflection compensation member is an elastic ring 434, and the elastic ring 434 is arranged between the outer cylindrical surface of the bearing 433 and the bracket 431. When the swing arm 420 rotates perpendicular to the horizontal plane with the vibration table 300, the vibration table 300 is driven by the swing arm 420 to generate a horizontal rotation movement trend. The swing arm 420 applies force to the bearing 433, and the bearing 433 is squeezed by the elastic ring 434. The elastic ring 434 is deformed so that the swing arm 420 can deflect in the horizontal direction, thereby realizing the horizontal rotation of the vibration table 300. The elastic ring 434 allows the straightening assembly 400 to have a certain flexibility while limiting the freedom of movement of the vibration table 300, thereby compensating for the expansion and contraction of the straightening assembly 400 during the operation of the test bench.

[0033] A retaining ring 435 is provided on one side of the bearing 433 close to the end of the first rotating shaft 432 , and the retaining ring 435 is used to shield, prevent dust, protect and limit the bearing 433 .

[0034] The straightening support 410 is arranged perpendicular to the base 100, and the straightening support 410 includes a vertical plate 411 and two side plates 412 arranged perpendicular to the vertical plate 411, the side plates 412 are triangular, and the axis of the first rotating shaft 432 is arranged parallel to the plane where the vertical plate 411 is located. One end of the swing arm 420 is arranged on the vertical plate 411 through a first decoupling rotation mechanism 430, and the other end of the swing arm 420 is arranged below the vibration table 300 through a second decoupling rotation mechanism 440, so that the swing arm 420 rotates around the first decoupling rotation mechanism 430 arranged on the vertical plate 411.

[0035] like Figure 5 As shown, the vibration table 300 includes a table body 310 and a connecting portion 320 extending outward from the table body 310, the connecting portion 320 is used to connect to the second decoupling rotation mechanism 440, and a yielding portion 330 is formed between the connecting portion 320 and the table body 310, and the yielding portion 330 is used to make the vibration table 300 avoid the straightening assembly 400 during the movement. When the vibration table 300 moves downward with the exciting assembly, the swing arm 420 also rotates downward. Due to the existence of the yielding portion 330, the swing arm 420 and the vibration table 300 can be prevented from colliding during the movement.

[0036] As an embodiment of the present invention, two ends of the hydraulic cylinder 210 are respectively connected to the base 100 and the vibration table 300 in the form of ball joints, and the ball joints are used to decouple the movement of the hydraulic cylinder 210.

[0037] As another embodiment of the present invention, Figure 2 As shown, the two ends of the hydraulic cylinder 210 are connected to the base 100 and the vibration table 300 respectively by a rotation mechanism 220, and the rotation mechanism 220 includes a first rotation support 221, a second rotation shaft 222, a second rotation support 223 and a third rotation shaft 224. The first rotation support 221 is fixed on the base 100 / vibration table 300, the second rotation shaft 222 is mounted on the first rotation support 221, the second rotation support 223 is fixed on the hydraulic cylinder 210, and the third rotation shaft 224 is mounted on the second rotation support 223. The second rotation shaft 222 and the third rotation shaft 224 are an integrated cross-shaped structure. The above-mentioned rotation mechanism 220 meets the large thrust requirements of some tests, and at the same time can avoid the problem of easy wear between the spherical surface and the mounting surface of the conventional ball joint, thereby ensuring the transmission accuracy.

[0038] As an embodiment of the present invention, the number of the excitation components corresponds to the number of the righting components 400, and each movement of the excitation component is restricted by a righting component 400 to limit the degree of freedom and guide the swinging motion.

[0039] As an embodiment of the present invention, there are at least two straightening assemblies 400, and there are multiple excitation assemblies.

[0040] As an embodiment of the present invention, there are 4 excitation components and they are evenly distributed in the circumferential direction, there are 4 straightening components 400 and they are evenly distributed in the circumferential direction, and the vibration table 300 is evenly driven by the excitation components and evenly pulled by the straightening components 400. The second decoupling rotation mechanisms 440 of the straightening mechanism are respectively arranged one by one below the connecting portion 320, and the swing arm 420 is arranged at the yielding portion 330, so that the swing arm 420 and the vibration table 300 can move smoothly without interfering with each other. The excitation component is arranged beside the second decoupling rotation mechanism 440, so that the swing arm 420 and the excitation component can move smoothly without interfering with each other.

[0041] The rocking and vibration composite test bench provided by the present invention uses the excitation component to apply a vertical vibration force to the vibration table 300, and by arranging the straightening component 400 to rotate in the vertical direction along with the vertical vibration of the vibration table 300, it drives the vibration table 300 to rotate in the horizontal direction, thereby realizing a vibration and rocking composite test on the specimen, and having excellent test accuracy and reliability.

[0042] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0043] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A swing vibration composite test bench, characterized in that: The invention comprises a base (100), a vibration excitation component and a vibration table (300) driven by the vibration excitation component, wherein the vibration excitation component comprises a hydraulic cylinder (210), the upper end of the hydraulic cylinder (210) is rotatably connected to the vibration table (300), the lower end of the hydraulic cylinder (210) is rotatably connected to the base (100), and the vibration excitation component can apply a vibration force in a vertical direction to the vibration table (300); A righting assembly (400) is provided between the base (100) and the vibration table (300), the righting assembly (400) comprising a righting support (410) and a swing arm (420), the righting support (410) being provided on the base (100), a first decoupling rotation mechanism (430) being provided at one end of the swing arm (420) and being connected to the righting support (410), and a second decoupling rotation mechanism (440) being provided at the other end of the swing arm (420) and being connected to the vibration table (300); The first decoupling rotation mechanism (430) and the second decoupling rotation mechanism (440) have the same structure. The first decoupling rotation mechanism (430) comprises a bracket (431) and a first rotating shaft (432) mounted on the bracket (431). The axis of the first rotating shaft (432) is parallel to a horizontal plane. The end of the swing arm (420) is rotatably connected to the first rotating shaft (432). The swing arm (420) can rotate perpendicular to the horizontal plane around the first decoupling rotation mechanism (430) along with the vibration table (300). A horizontal deflection compensation member is also provided on the bracket (431). The horizontal deflection compensation member is used to enable the swing arm (420) to rotate in a horizontal direction. The vibration table (300) rotates in a horizontal direction along with the swing arm (420) while performing reciprocating vibration in a vertical direction. Bearings (433) are respectively sleeved on both ends of the first rotating shaft (432), and the bearings (433) are arranged on a bracket (431); The uprighting support (410) is arranged perpendicular to the base (100), and comprises a vertical plate (411) and two side plates (412) arranged perpendicular to the vertical plate (411), the side plates (412) are triangular in shape, and the axis of the first rotating shaft (432) is arranged parallel to the plane where the vertical plate (411) is located.

2. The swing vibration composite test bench according to claim 1 is characterized in that: The horizontal deflection compensation component is an elastic ring (434), and the elastic ring (434) is arranged between the outer cylindrical surface of the bearing (433) and the bracket (431).

3. The swing vibration composite test bench according to claim 1 is characterized in that: A retaining ring (435) is provided on one side of the bearing (433) close to the end of the first rotating shaft (432).

4. The swing vibration composite test bench according to claim 1 is characterized in that: The vibration table (300) comprises a table body (310) and a connecting portion (320) extending outward from the table body (310); the connecting portion (320) is used to connect to a second decoupling rotation mechanism (440); a yielding portion (330) is formed between the connecting portion (320) and the table body (310); the yielding portion (330) is used to allow the vibration table (300) to avoid the straightening assembly (400) during movement.

5. The swing vibration composite test bench according to claim 1 is characterized in that: Both ends of the hydraulic cylinder (210) are respectively connected to the base (100) and the vibration table (300) in the form of ball joints.

6. The rocking and vibration composite test bench according to claim 1 is characterized in that: A rotating mechanism (220) is provided at both ends of the hydraulic cylinder (210), and the rotating mechanism (220) comprises a first rotating support (221), a second rotating shaft (222), a second rotating support (223) and a third rotating shaft (224); the first rotating support (221) is fixed on the base (100) / vibration table (300); the second rotating shaft (222) is mounted on the first rotating support (221); the second rotating support (223) is fixed on the hydraulic cylinder (210); the third rotating shaft (224) is mounted on the second rotating support (223); and the second rotating shaft (222) and the third rotating shaft (224) are an integrated cross-shaped structure.

7. The swing vibration composite test bench according to claim 1 is characterized in that: There are at least two righting assemblies (400).

8. The rocking and vibration composite test bench according to claim 7 is characterized in that: There are four excitation components which are evenly distributed in the circumferential direction, and there are four straightening components (400) which are evenly distributed in the circumferential direction.

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