CN210347042U - Vibration test tool for simulating flexible constraint - Google Patents
Vibration test tool for simulating flexible constraint Download PDFInfo
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- CN210347042U CN210347042U CN201921487906.5U CN201921487906U CN210347042U CN 210347042 U CN210347042 U CN 210347042U CN 201921487906 U CN201921487906 U CN 201921487906U CN 210347042 U CN210347042 U CN 210347042U
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Abstract
The utility model discloses a vibration test tool for simulating flexible constraint, which comprises a vibrating machine, wherein the top of the vibrating machine is provided with an installation bedplate, a rigid limit seat and a flexible limit seat are arranged on the installation bedplate at intervals, the rigid limit seat is provided with a first connecting part, and the flexible limit seat is provided with a second connecting part; be equipped with the holding chamber on the spacing seat of flexibility, the mobilizable installation piece that is equipped with in the holding chamber, second connecting portion set up on the installation piece to the holding intracavity is equipped with and is used for buffering spacing gasbag subassembly to the installation piece along X axle, Y axle, Z axle direction vibration, and gasbag subassembly's damping pressure is adjustable. The utility model discloses a vibration test frock of flexible restraint of simulation, damping characteristic is stable and can adjust, and the suitability is strong, and the simulation environment is true, and the test result is reliable stable.
Description
Technical Field
The utility model belongs to the technical field of simulation vibration test equipment technique and specifically relates to a vibration test frock of flexible restraint of simulation.
Background
In the automobile research and development process, vibration testing is an important reliable new evaluation index, and in the design of the traditional vibration tool, the higher the natural frequency requirement of the tool is, the better the natural frequency requirement is, so that the rigid constraint (as shown in fig. 1) is adopted as much as possible. However, as the engine is more and more miniaturized, the parts are fixed and more flexible, and the traditional rigid constraint cannot reflect the real vibration level on a vibration table in a laboratory, so a vibration tool of a double-spring mass point system is proposed to simulate the real vibration level, that is, the spring system is taken as the flexible constraint structure of the parts (as shown in fig. 2).
The vibration tool of the spring mass point system can achieve the vibration level of simulating the flexible constraint of the whole vehicle/engine on the final result, but has obvious defects, and restricts the large-scale use of the tool in the engineering field: 1) the spring mass point system has fixed damping characteristics and cannot cover the application conditions of different engines. 2) The spring mass point system can be rapidly attenuated in a durability test due to the damping characteristic of the spring, and if the spring mass point system is applied to a reliability test, the system characteristic is deviated, so that the simulation is failed, and the experiment is failed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the defect of the prior art is overcome, and the vibration test tool for simulating the flexible constraint, which has the advantages of stable and adjustable damping characteristic, strong applicability, real simulation environment and reliable and stable test result, is provided.
The utility model adopts the technical proposal that: the vibration testing tool for simulating the flexible constraint comprises a vibrating machine, wherein an installation bedplate is arranged at the top of the vibrating machine, a rigid limiting seat and a flexible limiting seat are arranged on the installation bedplate at intervals, a first connecting part is arranged on the rigid limiting seat, and a second connecting part is arranged on the flexible limiting seat; the flexible limiting seat is provided with a containing cavity, the containing cavity is movably provided with an installation block, the second connecting portion are arranged on the installation block, the containing cavity is internally provided with an air bag assembly used for buffering and limiting the installation block along the vibration of the X axis, the Y axis and the Z axis, and the damping pressure of the air bag assembly is adjustable.
Compared with the prior art, the technical scheme of the utility model have following advantage:
the utility model discloses a vibration test fixture of simulation flexibility restraint has adopted flexible spacing seat, is equipped with corresponding holding chamber on flexible spacing seat, and mobilizable in the holding chamber is provided with an installation piece, and the installation piece links to each other with the one end of the flexible spare part that awaits measuring to set up corresponding gasbag subassembly in the holding chamber, and this gasbag subassembly cushions the spacing simultaneously to the three dimension direction of X axle, Y axle, Z axle of installation piece, reaches accurate simulation effect; the air bag structure is arranged to serve as a damping element, the damping characteristic is more stable, attenuation is not easy to occur, the damping pressure of the air bag assembly is adjustable, the air bag assembly can be suitable for detection of flexible parts with various different requirements, and the universality is high.
As an improvement, the air bag assembly comprises a first air bag used for limiting the vibration of the mounting block in the X-axis direction, a second air bag used for limiting the vibration of the mounting block in the Y-axis direction, and a third air bag used for limiting the vibration of the mounting block in the Z-axis direction.
As an improvement, the first air bag, the second air bag and the third air bag are all provided with pressure regulating ports. The pressure of each air bag is adjustable, so that the air bag is suitable for flexible parts with different test requirements, and the universality is stronger.
The flexible limiting seat is provided with a rigid limiting seat, one side of the flexible limiting seat facing the rigid limiting seat is concave inwards to form an accommodating cavity, one side of the back of the accommodating cavity away from the opening end is provided with a mounting hole, the mounting block is provided with a connecting rod, and the other end of the connecting rod penetrates out of the mounting hole; the connecting block is located holding intracavity one end and wears to be equipped with at least one first gasbag in the outside of mounting hole one end, the connecting rod is worn to be equipped with the limiting plate in the outside one end of mounting hole still.
And the second air bags are symmetrically arranged on two sides of the containing cavity in the Y-axis direction of the mounting block, and the third air bags are symmetrically arranged on two sides of the Z-axis direction of the containing cavity. The symmetrical air bag structures are adopted in the Y-axis direction and the Z-axis direction, two sides can be restrained simultaneously, the size is guaranteed not to be affected by the change of the damping characteristic, and the air bag structures are second-order damping quality models, so that the simulation is more accurate.
As another preferred structure, the second balloon and the third balloon are of an integral structure, and the integral balloon is an annular balloon arranged around the X-axis direction. Adopt integral annular gasbag structure, it is more convenient at first to install, disposable installation can, secondly, integral structural stability is better to guarantee its flexibility constraint to detecting the part more steady, can reach the simulated environment who is closer to the actual situation more.
As a modification, an annular groove for accommodating the annular air bag is arranged in the accommodating cavity in the X-axis direction, and the groove depth H of the annular groove is equal to 1/2-2/3 of the diameter D of the annular air bag. The annular groove structure is used for limiting the annular air bag, so that the annular air bag cannot easily move due to position movement during vibration simulation, and better stability is achieved.
And the outer side wall of the mounting block is provided with an arc-shaped limiting groove corresponding to the annular groove. The arc-shaped limiting groove structure is also used for further limiting the annular air bag and improving the stability during vibration.
Drawings
FIG. 1 is a schematic diagram of a vibration simulation test mechanism for rigid parts in the prior art.
FIG. 2 is a schematic diagram of a vibration simulation test mechanism for flexible parts in the prior art.
Fig. 3 is a schematic diagram of the structure of the vibration testing tool for simulating flexible constraint according to the present invention.
Fig. 4 is a structural diagram of the flexible limiting seat along the axial section of the utility model.
Fig. 5 is a radial sectional view of an embodiment of the flexible retainer of the present invention.
Fig. 6 is a radial sectional view of another embodiment of the flexible retainer of the present invention.
Description of reference numerals:
100-vibration table, 110-flexible part;
1-mounting bedplate, 2-rigid limiting seat, 3-flexible limiting seat, 3.1-containing cavity, 3.2-mounting hole, 3.3-annular groove, 4-mounting block, 4.1-arc limiting groove, 5-air bag component, 5.1-first air bag, 5.2-second air bag, 5.3-third air bag, 6-connecting rod, 7-limiting plate and 8-annular air bag.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
In the description of the present invention, it should be noted that the terms "two sides", "outer side wall", "X axis", "Y axis", "Z axis", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, for the sake of distinguishing one from another.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 3, the utility model provides a vibration test tool for simulating flexible constraint, which comprises a vibrating machine 100, wherein the top of the vibrating machine 100 is provided with an installation bedplate 1, and the installation bedplate 1 is provided with a rigid limiting seat 2 and a flexible limiting seat 3 at intervals, wherein the rigid limiting seat 2 is provided with a first connecting part, and the flexible limiting seat 3 is provided with a second connecting part; the first connecting portion and the second connecting portion are used for being connected and fixed with two ends of the detected flexible part 110.
Specifically, be equipped with holding chamber 3.1 on flexible spacing seat 3, mobilizable installation piece 4 that is provided with in the holding chamber 3.1, second connecting portion set up on installation piece 4 to be equipped with in the holding chamber 3.1 and be used for buffering spacing gasbag subassembly 5 along X axle, Y axle, Z axle direction vibration to installation piece 4. Through the gasbag subassembly, the damping characteristic of the flexible restraint of simulation product in the practical application environment (like on the whole car engine) through the air spring mass system of second order promptly, and the gasbag structure has more excellent damping characteristic, and the characteristics of being convenient for adjust, and is convenient more high-efficient during the use.
More specifically, the gasbag subassembly is including being used for vibrating spacing first gasbag to the X axle direction of installation piece, to the Y axle direction of installation piece vibrate spacing second gasbag and to the Z axle direction vibration spacing third gasbag of installation piece, each gasbag structure is used for all having the buffering damping effect to the three dimension direction of installation piece 4, so that the flexible spare part of connecting has more and is close reality service environment when vibration simulation on installation piece 4, make the simulation more accurate.
As shown in fig. 4, one side of the flexible limiting seat 3 facing the rigid limiting seat is recessed to form an accommodating cavity 3.1, one side of the accommodating cavity 3.1 away from the opening end is provided with a mounting hole 3.2, the mounting block 4 is provided with a connecting rod 6, the connecting rod 6 is horizontally arranged along the X-axis direction, one end of the connecting rod 6 is connected with the mounting block 4, and the other end penetrates through the mounting hole 3.2; in this embodiment, the connecting rod 6 and the mounting block 4 are an integral structure and are obtained by one-time integral processing and forming. Of course, in other embodiments, the connecting rod 6 and the mounting block 4 may be welded, inserted or screwed together.
Specifically, the outside that is located holding chamber 3.1 one end at connecting rod 6 and wears to be equipped with at least one first gasbag 5.1 in the outside of mounting hole 3.2 one end, specifically, the quantity that lies in holding chamber 3.1 inside and outside both sides and set up first gasbag 5.1 on the connecting rod 6 lateral wall is not only limited to one, can be two, also can be a plurality of, but for damping pressure's stationarity, the quantity of the first gasbag 5.1 that sets up in mounting hole 3.1 both sides keeps unanimous, and guarantees that pressure is the same.
And a limiting plate 7 is arranged at one end of the connecting rod 6 penetrating out of the mounting hole 3.2, and the limiting plate 7 is mainly used for blocking the first air bag 5.1 on the limiting connecting rod 6 and positioned outside the mounting hole 3.2. This construction allows the damping force of the first air bag 5.1 to be applied in both directions when the mounting block 4 is moved left and right in the X-axis direction.
As shown in fig. 5, in the structure of the embodiment, the second air bags 5.2 are symmetrically arranged at two sides of the accommodating cavity 3.1 in the Y-axis direction of the mounting block 4, and the third air bags 5.3 are symmetrically arranged at two sides of the Z-axis direction. Certainly, in order to make the installation of the second airbag 5.2 and the third airbag 5.3 more convenient, the installation block 4 is set to be a rectangular structure, the accommodation chamber 3.1 is also set to be a rectangular structure, and corresponding positions on four side walls of the accommodation chamber 3.1 are provided with limit holes (not shown in the figure), the same limit holes are also arranged on four side surfaces of the installation block 4 corresponding to the four side walls of the accommodation chamber 3.1, during installation, the installation block 4 extends into the accommodation chamber 3.1, the second airbag 5.2 and the third airbag 5.3 are respectively installed between the four outer side walls and the inner side wall of the accommodation chamber 3.1, and both sides of each airbag are matched in the corresponding limit holes along with the installation block 4 inserted in the accommodation chamber 3.1 to the preset position. In this configuration, the number of air bags provided on both sides of the mounting block 4 in the Y-axis and Z-axis directions may be one or two, specifically, the number of air bags may be two according to actual damping requirements.
In another embodiment, as shown in fig. 6, the second 5.2 and third 5.3 balloons are of unitary construction and the unitary balloons are annular balloons 8 disposed about the X axis. For easy dismounting in this structure, set installation piece 4 to cylindrical structure, equally, holding chamber 3.1 then is cylindrical cavity, and this annular airbag 8's inner circle wall suit is on cylindrical installation piece 4's lateral wall, and annular airbag 8's outer lane wall top leans on holding chamber 3.1's inside wall, and annular structure makes installation piece 4 have more comprehensive circumference damping spacing.
Specifically, in order to limit the annular airbag 8, an annular groove 3.3 for accommodating the annular airbag 8 is formed in the inner side wall of the accommodating cavity 3.1 around the X axis direction, and the groove depth H of the annular groove 3.3 is equal to 1/2-2/3 of the diameter D of the annular airbag, that is, H is 1/2D-2/3D. In this structure, set the degree of depth of annular groove 3.3 to be greater than 8 diameter D of annular gasbag one-half the time, can be better guarantee that annular gasbag 8 can not deviate from in the annular groove 3.3, but degree of depth H also can not be too dark, when the gasbag atress compression like this, the installation piece 4 lateral wall will directly produce rigid contact with the inside wall of holding chamber 3.1, influence the test result, so after rational calculation and many times of experiments, confirm that the groove depth H of this annular groove 3.3 is less than two-thirds of 8 diameter D of annular gasbag, promptly, the distance that 1/3D still was left to the side of annular gasbag 8 is used for compression deformation.
More specifically, an arc-shaped limiting groove 4.1 is formed in the outer side wall of the mounting block 4 and corresponds to the annular groove 3.3. During the installation, at first with 8 press fittings of annular gasbag in the annular groove 3.3 of holding chamber 3.1 in, then stretch into holding chamber 3.1 with installation piece 4, guarantee that installation piece 4 axis is coaxial with holding chamber 3.1 axis, along with installation piece 4 continues propelling movement inwards, until 8 inner circle lateral walls of annular gasbag suit on the lateral wall of installation piece 4, when installation piece 4 was installed to preset the position, guarantee that 8 inner circle lateral walls of annular gasbag cooperate in annular groove 3.3.
While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.
Claims (8)
1. The utility model provides a vibration test frock of flexible restraint of simulation, includes bobbing machine (100), the top of bobbing machine (100) is equipped with installation platen (1), its characterized in that: the mounting bedplate (1) is provided with a rigid limiting seat (2) and a flexible limiting seat (3) at intervals, the rigid limiting seat (2) is provided with a first connecting part, and the flexible limiting seat (3) is provided with a second connecting part; spacing seat of flexibility (3) on be equipped with holding chamber (3.1), holding chamber (3.1) in mobilizable installation piece (4) that is equipped with, second connecting portion set up on installation piece (4), and holding chamber (3.1) in be equipped with and be used for buffering spacing gasbag subassembly (5) to installation piece (4) along X axle, Y axle, Z axle direction vibration, just the damping pressure of gasbag subassembly is adjustable.
2. The vibration testing tool for simulating flexible constraint according to claim 1, characterized in that: the air bag assembly (5) comprises a first air bag (5.1) used for limiting vibration of the mounting block (4) in the X-axis direction, a second air bag (5.2) used for limiting vibration of the mounting block in the Y-axis direction and a third air bag (5.3) used for limiting vibration of the mounting block in the Z-axis direction.
3. The vibration testing tool for simulating flexible constraint according to claim 2, characterized in that: the first air bag (5.1), the second air bag (5.2) and the third air bag (5.3) are all provided with pressure regulating ports.
4. The vibration test tool for simulating flexible constraint according to claim 2 or 3, characterized in that: one side of the flexible limiting seat (3) facing the rigid limiting seat (2) is inwards concave to form an accommodating cavity (3.1), one side of the accommodating cavity (3.1) departing from the opening end is provided with a mounting hole (3.2), the mounting block (4) is provided with a connecting rod (6), and the other end of the connecting rod (6) penetrates through the mounting hole (3.2); connecting rod (6) are located holding chamber (3.1) one end and wear to be equipped with at least one first gasbag (5.1) all from the outside of mounting hole (3.2) one end, connecting rod (6) are worn to be equipped with limiting plate (7) from the outside one end of mounting hole (3.2).
5. The vibration testing tool for simulating flexible constraint according to claim 4, characterized in that: and second air bags (5.2) are symmetrically arranged on two sides of the accommodating cavity (3.1) in the Y-axis direction of the mounting block (4), and third air bags (5.3) are symmetrically arranged on two sides of the Z-axis direction.
6. The vibration testing tool for simulating flexible constraint according to claim 4, characterized in that: the second air bag (5.2) and the third air bag (5.3) are of an integral structure, and the integral air bag is an annular air bag (8) arranged around the X-axis direction.
7. The vibration testing tool for simulating flexible constraint according to claim 6, characterized in that: an annular groove (3.3) used for accommodating the annular air bag (8) is arranged in the accommodating cavity (3.1) around the X axis direction, and the groove depth H of the annular groove (3.3) is equal to 1/2-2/3 of the diameter D of the annular air bag.
8. The vibration testing tool for simulating flexible constraint according to claim 7, characterized in that: and an arc-shaped limiting groove (4.1) is arranged on the outer side wall of the mounting block (4) and corresponds to the annular groove (3.3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921487906.5U CN210347042U (en) | 2019-09-09 | 2019-09-09 | Vibration test tool for simulating flexible constraint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921487906.5U CN210347042U (en) | 2019-09-09 | 2019-09-09 | Vibration test tool for simulating flexible constraint |
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| CN210347042U true CN210347042U (en) | 2020-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884289A (en) * | 2021-09-27 | 2022-01-04 | 天津大学 | End part restraint device for deep water steel catenary riser contact section test platform |
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2019
- 2019-09-09 CN CN201921487906.5U patent/CN210347042U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884289A (en) * | 2021-09-27 | 2022-01-04 | 天津大学 | End part restraint device for deep water steel catenary riser contact section test platform |
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