CN111521363A - Horizontal direction parallel excitation vibration test device - Google Patents
Horizontal direction parallel excitation vibration test device Download PDFInfo
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- CN111521363A CN111521363A CN202010400905.3A CN202010400905A CN111521363A CN 111521363 A CN111521363 A CN 111521363A CN 202010400905 A CN202010400905 A CN 202010400905A CN 111521363 A CN111521363 A CN 111521363A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
Abstract
The invention relates to a parallel excitation vibration test device in the horizontal direction, which comprises a plurality of vibration exciters fixed on the ground and a plurality of horizontal sliding tables with multiple degrees of freedom, wherein each vibration exciter is correspondingly connected with one horizontal sliding table; the plurality of vibration exciters are arranged side by side, and the plurality of horizontal sliding tables are positioned at the same side of the plurality of vibration exciters. The vibration exciters are correspondingly connected to the horizontal sliding table, parallel excitation vibration in the horizontal direction is realized on the horizontal sliding table through the vibration exciters, and synchronous or asynchronous parallel excitation of the vibration exciters on the horizontal sliding table is realized by adopting a decoupling mechanism; a plurality of horizontal sliding tables are fixed to the long test piece through the tool, and the long test piece is flexible and convenient, cannot be damaged, and meanwhile achieves high-frequency vibration.
Description
Technical Field
The invention relates to the technical field of vibration tests, in particular to a horizontal direction parallel excitation vibration test device for generating vibration.
Background
The electric vibration table can simulate various vibration mechanical environments and is widely applied to simulation tests of various typical vibrations of automobile parts, electronic components, aerospace product stress screening and the like. For some long test pieces such as long shafts, missiles and the like, a single vibration table is difficult to meet the test requirements, and at the moment, two or more vibration tables are required to be excited simultaneously.
At present, only a double-table parallel excitation scheme of a long test piece in the vertical direction is adopted, and an ideal test device for simultaneously exciting in the horizontal direction is not provided. The parallel excitation scheme of the long test piece in the vertical direction is as follows: 1. placing two vertical vibration exciters side by side in the vertical direction; 2. the upper parts of the two vibration exciters are respectively provided with a decoupled spherical bearing; 3. respectively installing the tooling on the two spherical bearings, and fixing the long test piece by using the tooling; 4. an elastic lifting rope is arranged on the tool to pull the spherical bearing, so that the spherical bearing is prevented from turning over to cause test failure. This method of pulling the spherical bearing with the elastic suspension cord is then not suitable for parallel excitation in the horizontal direction.
The current horizontal and exciting embodiments: patent CN201410734261.6, this scheme mainly has two shaking tables, two outer supporting seats, an inner supporting seat, two bull's nose connecting pieces, horizontal base and a large-scale combination horizontal sliding table etc. and constitutes. The test system is mainly used for large test pieces and cannot meet the test requirements of long test pieces. The reasons are: 1. the vibration table and the ox head connecting piece, and the ox head connecting piece and the table top are all in hard connection, and only synchronous parallel excitation tests can be carried out, but asynchronous parallel excitation tests cannot be carried out; 2. the horizontal table top has large size and mass, so that the vibration acceleration is small, and the large acceleration test cannot be met; 3. due to the limitation of the prior art, the synchronization of the two table bodies is difficult to realize, so that the damage to equipment and a test piece is large, high-frequency vibration cannot be realized, and the synchronization of the high-frequency vibration is more difficult.
With the development and development of long test piece products, the requirement for environmental tests is higher, wherein the requirement for parallel excitation of multiple horizontal parts is more urgent, and particularly asynchronous parallel excitation is realized.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a horizontal direction parallel excitation vibration test device for realizing synchronous or asynchronous parallel excitation test in the horizontal direction.
The technical scheme adopted by the invention for solving the technical problems is as follows: a parallel excitation vibration test device in the horizontal direction comprises a plurality of vibration exciters and a plurality of horizontal sliding tables with multiple degrees of freedom, wherein the vibration exciters are fixed on the ground, each vibration exciter is correspondingly connected with one horizontal sliding table, a coupler and a decoupling mechanism are arranged between each vibration exciter and the corresponding horizontal sliding table, and a tool for fixing a test piece is arranged on each horizontal sliding table; the plurality of vibration exciters are arranged side by side, and the plurality of horizontal sliding tables are positioned at the same side of the plurality of vibration exciters.
Further specifically, horizontal slip table including be fixed in subaerial and upper portion open-ended batch oil tank, set up bearing platform in the batch oil tank, set up in the horizontal mesa of bearing platform top the batch oil tank on set up oil feed hole and oil gallery bearing platform on set up a plurality of orifices, the oil feed hole directly give the orifice fuel feeding through the pump, fluid pass through behind the orifice and form the oil film between bearing platform and horizontal mesa.
Further specifically, a plurality of supporting blocks are arranged in the oil storage tank, a fixed flat plate is arranged on the supporting blocks, the bearing platform is fixed on the fixed flat plate, a first oil return gap is formed between the bearing platform and the side wall of the oil storage tank, and an oil return structure communicated with the oil storage tank is arranged on the fixed flat plate; the fixed flat plate, a box body bottom plate and a box body side plate of the oil storage box form an oil storage cavity.
Further specifically, the batch oil tank be the square or the cuboid, the supporting shoe have four and be fixed in on four angles of batch oil tank bottom respectively, fixed flat board be fixed in on the supporting shoe.
Further specifically, the oil return structure is an oil return opening arranged on the fixed flat plate, and the oil return opening is communicated with the first oil return gap.
Further specifically, the oil return structure is a second oil return gap arranged between the fixed flat plate and the side wall of the oil storage tank, and the second oil return gap is communicated with the first oil return gap.
More specifically, a plurality of throttle holes are arranged in an array, and a throttle valve is arranged on each throttle hole.
More specifically, the plurality of vibration exciters are fixed on the ground through vibration exciter supports, and at least one vibration exciter is fixed on each vibration exciter support.
Further specifically, the coupler comprises a vertical connecting plate fixed on the decoupling mechanism, a horizontal connecting plate arranged on the vertical connecting plate, and a reinforcing rib arranged between the vertical connecting plate and the horizontal connecting plate, wherein the horizontal connecting plate is connected to the horizontal sliding table.
Further specifically, the vertical connecting plate is provided with a counter bore, the side face of the horizontal connecting plate is provided with a plurality of nut grooves, the top face of the horizontal connecting plate is provided with a connecting straight hole, the connecting straight hole is communicated with the nut grooves, a screw rod is arranged in the connecting straight hole, the screw rod is fixed on the horizontal sliding table, a nut is arranged in the nut groove, and the nut is matched with the screw rod.
The invention has the beneficial effects that: the vibration exciters are correspondingly connected to the horizontal sliding table, parallel excitation vibration in the horizontal direction is realized on the horizontal sliding table through the vibration exciters, and synchronous or asynchronous parallel excitation of the vibration exciters on the horizontal sliding table is realized by adopting a decoupling mechanism; a plurality of horizontal sliding tables are fixed to the long test piece through the tool, and the long test piece is flexible and convenient, cannot be damaged, and meanwhile achieves high-frequency vibration.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic perspective cross-sectional view of a horizontal slide of the present invention;
FIG. 4 is a schematic view of a half-section of the horizontal slide of the present invention;
FIG. 5 is a schematic view of the horizontal slide accumulator of the present invention;
FIG. 6 is a schematic structural view of the inventive tool;
fig. 7 is a schematic view of the structure of the coupling member of the present invention.
In the figure: 1. a vibration exciter; 2. a decoupling mechanism; 3. a coupling; 4. a horizontal sliding table; 5. assembling; 6. a test piece; 7. a vibration exciter support; 31. a vertical connecting plate; 32. a horizontal connecting plate; 33. connecting reinforcing ribs; 34. a countersunk hole; 35. a nut groove; 36. connecting the straight holes; 41. an oil storage tank; 411. a box body bottom plate; 412. a box body side plate; 4111. an oil supply hole; 4112. an oil return hole; 42. fixing the flat plate; 43. a load-bearing platform; 431. an orifice; 44. a horizontal table top; 441. fixing screw holes; 45. an oil storage chamber; 46. a support block; 47. a first oil return gap; 48. a second oil return gap; 51. a tooling top plate; 52. a side plate of the tool; 53. mounting a plate; 54. and (5) tooling reinforcing ribs.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the parallel excitation vibration testing device in the horizontal direction includes a plurality of vibration exciters 1 fixed on the ground and a plurality of horizontal sliding tables 2 with multiple degrees of freedom, each vibration exciter 1 is correspondingly connected with one horizontal sliding table 2, a coupler 3 and a decoupling mechanism 2 are arranged between the vibration exciters 1 and the horizontal sliding tables 2, the decoupling mechanism 2 is fixed on the vibration exciters 1, the coupler 3 is fixed on a horizontal sliding table 4, the coupler 3 is connected with the decoupling mechanism 2, the vibration generated by the vibration exciters 1 is transmitted to the horizontal sliding table 4 through the decoupling mechanisms 2 and the coupler 3, so that the horizontal sliding table 4 vibrates in the horizontal direction, and the decoupling mechanism 2 at this position adopts application number CN201710888699.3, which is named as a hydraulic spherical coupler with a retaining mechanism; the horizontal sliding tables 4 are provided with tools 5 for fixing the test pieces 6, each horizontal sliding table 4 is provided with at least one tool 5, the number of the adopted tools 5 is determined according to the size of the test piece 6, if the test piece 6 is thicker, each horizontal sliding table 4 can adopt one tool 5, and if the test piece 6 is thinner, each horizontal sliding table 4 is fixed by adopting a plurality of tools 5; the vibration exciters 1 are arranged side by side, the horizontal sliding tables 4 are positioned on the same sides of the vibration exciters 1, namely, one vibration exciter 1 and one horizontal sliding table 4 form a combination, and the test piece 6 stretches across and is fixed on the horizontal sliding tables 4.
The vibration exciter 1 is fixed on the ground through the vibration exciter support 7, at least one vibration exciter 1 is fixed on the vibration exciter support 7, namely one vibration exciter 1, two vibration exciters 1 or more vibration exciters 1 can be fixed on one vibration exciter support 7, one vibration exciter 1 is fixed by one vibration exciter support 7 in the scheme, and the position of the adjacent vibration exciter 1 is conveniently adjusted.
As shown in fig. 3-5, the horizontal sliding table 4 adopts a multi-degree-of-freedom horizontal sliding table, which includes an oil storage tank 41 fixed on the ground and having an upper opening, a bearing platform 43 disposed in the oil storage tank 41, and a horizontal table surface 44 disposed above the bearing platform 43, where the oil storage tank 41 is formed by fixing a tank bottom plate 411 and four tank side plates 412, the oil storage tank 41 is provided with an oil supply hole 4111 and an oil return hole 4112, the oil supply hole 4111 and the oil return hole 4112 are disposed on the tank bottom plate 411 or the tank side plates 4112, and are disposed on the tank bottom plate 4111 in the present scheme, so as to facilitate complete recovery of oil in the oil storage tank 41; a plurality of orifices 431 are arranged on the bearing platform 43, the orifices 431 are arranged in an array, and a throttle valve is arranged on each orifice 431, so that the formed oil film and pressure are uniform; the oil supply hole 4111 supplies oil to the throttle valve on the throttle hole 431 directly through a pump or through an oil separator, an oil film is formed between the bearing platform 43 and the horizontal platform surface 44 after oil passes through the throttle hole 431, and the oil film can be formed by adjusting the pressure of the supplied oil according to the thickness of the oil film; meanwhile, a plurality of supporting blocks 46 are arranged in the oil storage tank 41, a fixed flat plate 42 is arranged on the plurality of supporting blocks 46, the bearing platform 43 is fixed on the fixed flat plate 42, the fixed flat plate 42 is fixed on the supporting blocks 46, a first oil return gap 47 is formed between the bearing platform 43 and the side wall of the oil storage tank 41, and the purpose of the first oil return gap 47 is to enable oil to flow into the oil storage tank 41; an oil return structure communicated with the oil storage tank 41 is arranged on the fixed flat plate 42; the fixed flat plate 42, the tank bottom plate 411 of the oil storage tank 41 and the tank side plate 412 form an oil storage cavity 45, the oil storage cavity 45 is used for collecting oil and then recovering the oil through an oil return hole 4112, the recovered oil is filtered and purified and then stored in an external hydraulic station, and then the external hydraulic station supplies oil through an oil supply hole 4111; many shapes can be made into to the batch oil tank 41 as required, for example, it is cylindrical, square or cuboid, or other special-shaped shape, adopt square or cuboid in this scheme can, convenient processing, corresponding supporting shoe 46 sets up to four and is fixed in respectively on four angles of batch oil tank 41 bottom, and simultaneously, fixed flat board 42 is fixed in on the supporting shoe 46, according to batch oil tank 41's size, supporting shoe 46's setting can be a plurality of, for example, the central point of box bottom plate 411 puts and the four corners position, or a plurality of array of being arranges, the main objective plays supporting role, guarantee that fixed flat board 42 can not warp because of overweight.
The oil return structure can have two forms, the first form is that the fixed flat plate 42 is fixed on the supporting block 46, the periphery of the fixed flat plate is sealed with the side wall of the oil storage tank 41, the fixed flat plate 42 is provided with an oil return opening, the oil return opening can be a hole formed in the fixed flat plate 42, the oil return opening enables the first oil return gap 47 to be communicated with the oil storage cavity 45, and oil directly enters the oil storage cavity 41 after passing through the oil return opening from the first oil return gap 47; secondly, when the fixing flat plate 42 is manufactured, the size of the fixing flat plate 42 is smaller than that of the oil storage tank 41, a second oil return gap 48 is formed between the fixing flat plate 42 and the tank body side plate 412 in the mounting process, and the second oil return gap 48 plays a role in communicating the first oil return gap 47 with the oil storage tank 41; meanwhile, the edge of the fixed plate 42 may be formed in various shapes, such as a wave shape, a zigzag shape, a triangular shape, etc., so that a passage through which the oil is supplied is formed between the fixed plate 42 and the case side plate 412.
Set up the fixed screw 441 that a plurality of arrays were arranged on horizontal mesa 44, fixed screw 441 cooperates with frock 5, frock 5 for fixed test piece 6 is the U type, frock 5 shown in fig. 6 includes a frock roof 51 and two frock curb plate 52 from frock roof 51 both ends downwardly formed, bottom at two frock curb plate 52 sets up mounting panel 53, set up the mounting hole on mounting panel 53, the screw passes the mounting hole and fastens the cooperation with fixed screw 441, at frock roof 51, frock curb plate 52 and mounting panel 53 outside sets up frock strengthening rib 54, frock strengthening rib 54 can set up single row or multirow, guarantee the intensity of frock 5.
As shown in fig. 7, the coupler 3 includes a vertical connecting plate 31 fixed to the decoupling mechanism, a horizontal connecting plate 32 disposed on the vertical connecting plate 31, and a connecting reinforcing rib 33 disposed between the vertical connecting plate 31 and the horizontal connecting plate 32, wherein a countersunk hole 34 is formed in the vertical connecting plate 31, the vertical connecting plate 31 is connected to the decoupling mechanism 2 through a screw in the countersunk hole 34, a plurality of nut grooves 35 are formed in a side surface of the horizontal connecting plate 32, a connecting straight hole 36 is formed in a top surface of the horizontal connecting plate 32, the connecting straight hole 36 is communicated with the nut grooves 35, a screw is disposed in the connecting straight hole 36, the screw is fixed to a horizontal table surface 44, a nut is disposed in the nut groove 35, and the nut is matched with the screw; the horizontal connecting plate 32 is located in the middle of the vertical connecting plate 31, the connecting reinforcing ribs 33 are located on two sides of the horizontal connecting plate 32, and three connecting reinforcing ribs 33 are arranged on each side.
In summary, parallel excitation vibration in the horizontal direction is realized on the horizontal sliding table 4 through the plurality of vibration exciters 1, and synchronous or asynchronous parallel excitation of the plurality of vibration exciters 1 on the horizontal sliding table 4 is realized by adopting the decoupling mechanism 2; the plurality of horizontal sliding tables 4 simultaneously fix the test piece 6 through the tool 5, so that the test piece 6 is more flexible and convenient, the test piece 6 cannot be damaged, and high-frequency vibration is realized; the horizontal sliding table 4 supports the horizontal table top 44 through an oil film, friction can be reduced, the horizontal table top 44 is flexibly connected in the using process, namely the horizontal table top 44 possibly moves up and down in the moving process, the oil film can well achieve a buffering effect, a testing device is protected, and better testing conditions are provided.
It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A parallel excitation vibration test device in the horizontal direction comprises a plurality of vibration exciters (1) fixed on the ground and a plurality of horizontal sliding tables (4) with multiple degrees of freedom, wherein each vibration exciter (1) is correspondingly connected with one horizontal sliding table (4), and is characterized in that a coupler (3) and a decoupling mechanism (2) are arranged between each vibration exciter (1) and each horizontal sliding table (4), and a tool (5) for fixing a test piece (6) is arranged on each horizontal sliding table (4); the vibration exciters (1) are arranged side by side, and the horizontal sliding tables (4) are located on the same side of the vibration exciters (1).
2. The horizontal direction parallel excitation vibration test device of claim 1, wherein, the horizontal sliding table (4) including be fixed in subaerial and upper portion open-ended batch oil tank (41), set up bearing platform (43) in batch oil tank (41), set up horizontal mesa (44) above bearing platform (43) batch oil tank (41) on set up oil feed hole (4111) and oil return hole (4112), bearing platform (43) on set up a plurality of orifices (431), oil feed hole (4111) directly supply oil to orifice (431) through the pump, fluid form the oil film after orifice (431) between bearing platform (43) and horizontal mesa (44).
3. The horizontal direction parallel excitation vibration testing device according to claim 2, wherein a plurality of supporting blocks (46) are arranged in the oil storage tank (41), a fixed flat plate (42) is arranged on the plurality of supporting blocks (46), the bearing platform (43) is fixed on the fixed flat plate (42), a first oil return gap (47) is formed between the bearing platform (43) and the side wall of the oil storage tank (41), and an oil return structure communicated with the oil storage tank (41) is arranged on the fixed flat plate (42); the fixed flat plate (42), a box body bottom plate (411) and a box body side plate (412) of the oil storage box (42) form an oil storage cavity (45).
4. The horizontal direction parallel excitation vibration testing device according to claim 3, wherein the oil storage tank (41) is a cube or a rectangular parallelepiped, four supporting blocks (46) are respectively fixed at four corners of the bottom of the oil storage tank (41), and the fixing plate (42) is fixed on the supporting blocks (46).
5. The horizontal direction parallel excitation vibration testing device according to claim 3, wherein the oil return structure is an oil return opening arranged on the fixed flat plate (42), and the oil return opening is communicated with the first oil return gap (47).
6. The horizontal direction parallel excitation vibration testing device according to claim 3, wherein the oil return structure is a second oil return gap (48) arranged between the fixed flat plate (42) and the side wall of the oil storage tank (41), and the second oil return gap (48) is communicated with the first oil return gap (47).
7. The horizontal direction shunt-wound vibration test device according to claim 2, wherein a plurality of throttle holes (431) are arranged in an array, and a throttle valve is provided on each throttle hole (431).
8. The parallel vibration testing device according to claim 1, wherein a plurality of said vibration exciters (1) are fixed on the ground through vibration exciter supports (7), and at least one vibration exciter (1) is fixed on said vibration exciter supports (7).
9. The horizontal direction parallel excitation vibration test device according to claim 1, wherein the coupler (3) comprises a vertical connecting plate (31) fixed on the decoupling mechanism (2), a horizontal connecting plate (32) arranged on the vertical connecting plate (31), and a connecting reinforcing rib (33) arranged between the vertical connecting plate (31) and the horizontal connecting plate (32), and the horizontal connecting plate (32) is connected to the horizontal sliding table (4).
10. The parallel vibration testing device in the horizontal direction as claimed in claim 9, wherein a countersunk hole (34) is formed in the vertical connecting plate (31), a plurality of nut grooves (35) are formed in the side surface of the horizontal connecting plate (32), a connecting straight hole (36) is formed in the top surface of the horizontal connecting plate (32), the connecting straight hole (36) is communicated with the nut grooves (35), a screw is arranged in the connecting straight hole (36), the screw is fixed on the horizontal sliding table (4), a nut is arranged in the nut groove (35), and the nut is matched with the screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010400905.3A CN111521363A (en) | 2020-05-13 | 2020-05-13 | Horizontal direction parallel excitation vibration test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010400905.3A CN111521363A (en) | 2020-05-13 | 2020-05-13 | Horizontal direction parallel excitation vibration test device |
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| CN111521363A true CN111521363A (en) | 2020-08-11 |
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| CN202010400905.3A Pending CN111521363A (en) | 2020-05-13 | 2020-05-13 | Horizontal direction parallel excitation vibration test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710449A (en) * | 2020-12-17 | 2021-04-27 | 北京苏试创博环境可靠性技术有限公司 | Horizontal excitation test device, combination thereof and installation method of horizontal excitation test device |
-
2020
- 2020-05-13 CN CN202010400905.3A patent/CN111521363A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710449A (en) * | 2020-12-17 | 2021-04-27 | 北京苏试创博环境可靠性技术有限公司 | Horizontal excitation test device, combination thereof and installation method of horizontal excitation test device |
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