CN111579192A - Fixing device of pneumatic type horizontal resonance board - Google Patents
Fixing device of pneumatic type horizontal resonance board Download PDFInfo
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- CN111579192A CN111579192A CN202010449777.1A CN202010449777A CN111579192A CN 111579192 A CN111579192 A CN 111579192A CN 202010449777 A CN202010449777 A CN 202010449777A CN 111579192 A CN111579192 A CN 111579192A
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- fixing device
- impact
- hole
- connecting piece
- resonance plate
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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
- G01M7/08—Shock-testing
Abstract
The invention provides a fixing device of a pneumatic horizontal resonance plate, which comprises a connecting piece and an air cylinder, wherein the air cylinder can stretch out and draw back to enable a connecting end of the air cylinder to reciprocate, the connecting piece is used for connecting the connecting end and the resonance plate, the connecting piece and the connecting end can be detachably connected, and the connecting piece is fixedly connected with the resonance plate. The fixing device provided by the invention enables the resonance plate to keep relatively static before being collided, thereby being beneficial to ensuring the accuracy of test data; the labor intensity of operators is reduced, and the collision of test pieces caused by human factors is avoided.
Description
Technical Field
The invention relates to the field of spacecraft dynamics tests, in particular to a fixing device for a pneumatic horizontal resonance plate.
Background
The aerospace product needs to be subjected to an impact test in a development stage, the impact test requires an impact response spectrum, and the existing test methods of the impact response spectrum mainly comprise the following three types: (1) initiating explosive device explosion mode; (2) a mechanical simulation method; (3) and (5) simulating a vibration table. The initiating explosive device explosion mode simulation test has higher accuracy, high acceleration and frequency range, but high test cost, poor safety and large load magnitude discreteness; the simulation cost of the vibration table simulation mode is low, the controllability is high, but the test magnitude of the mode is low, such as a pneumatic horizontal response spectrum tester.
In order to meet the increasing development requirements of spacecrafts, a set of pneumatic horizontal high-magnitude impact response spectrum testing machine is urgently needed to be developed, and the development of the pneumatic horizontal high-magnitude impact response spectrum testing machine needs a large-size impact table (a resonance plate) and a fixing device for fixing the impact table, and is of great importance to guarantee the testing precision and the safety of a test piece.
For the existing large-size impact table, after a test is finished, a plurality of persons are required to cooperate with the reset impact table, the labor intensity is high, and the container collides with a test piece during operation, so that the test piece is unnecessarily damaged. It is desirable to provide a pneumatic horizontal resonator plate mounting apparatus that at least partially solves the above-mentioned problems.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a pneumatic horizontal resonator plate fixing device to solve at least one of the technical problems mentioned in the background art.
In a first aspect: a pneumatic horizontal resonant plate fixing device comprises a connecting piece and a cylinder,
the cylinder can stretch out and draw back to make the connecting end of the cylinder reciprocate,
the connecting piece is used for connecting link and resonance panel, the connecting piece with the link can be dismantled and be connected, the connecting piece with resonance panel fixed connection.
Preferably, the connecting piece is provided with a first through hole which can be passed through by the connecting end, which is provided with an external thread.
Preferably, the connection end is clearance-fitted with the first through hole.
Preferably, the cross-section of the connection end is circular, the diameter of the connection end is 27mm,
the first through hole is a round hole, and the diameter of the first through hole is 28 mm.
Preferably, the connecting member is L-shaped, the connecting member includes a first portion connected to the connecting end and a second portion connected to the resonator plate,
the first portion is provided with the first through hole, and the second portion is provided with the second through hole.
Preferably, the travel of the connecting end is at least 90 mm.
Preferably, the inflation pressure of the cylinder is 0.1-10 MPa.
In a second aspect: a pneumatic horizontal impact response spectrum testing machine comprising the fixing device of the pneumatic horizontal resonance plate of any one of the first aspect.
The fixing device provided by the invention enables the resonance plate to keep relatively static before being collided, thereby being beneficial to ensuring the accuracy of test data; the labor intensity of operators is reduced, and the collision of test pieces caused by human factors is avoided.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic diagram of the working principle of an embodiment according to the present invention;
FIG. 2 is a top view of a pneumatic horizontal impact response spectroscopy machine according to an embodiment of the present invention;
FIG. 3 is a front view of a pneumatic horizontal impact response spectroscopy tester according to an embodiment of the invention;
FIG. 4 is a schematic structural view of a fixation device according to an embodiment of the present invention;
in FIGS. 1-4:
1. the device comprises a resonant plate, a 2 test piece, a 3 base, a 4 mass block, a 5 impact power component, a 51 impact hammer, a 52 piston push rod, a 53 impact cylinder, a 54 air storage cylinder;
6. guide rail, 7, fixing device, 71, cylinder, 711, link, 72, connecting piece, 721, first portion, 7211, first through-hole, 722, second portion, 7221, second through-hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In the description of the present invention, it is to be understood that the terms "radial", "axial", "upper" inner "," outer ", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection: may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the pneumatic horizontal impact response spectrum tester works on the principle that when a plate (for example, a resonance plate 1) is impacted, the plate is excited to resonate, and when a test piece 2 (for example, an aerospace product) is fixed on the plate, the action effect of the impact force is adjusted, so that the excited response of the plate is similar to a complex damped sine wave, and if the impact spectrum generated by the response is consistent with the required impact spectrum, the test piece 2 is considered to be subjected to an explosive impact environment test.
Referring to fig. 2 and 3, a pneumatic horizontal impact response spectrum tester includes a resonator plate 1, an impact power assembly 5, a mass 4, a base 3, and a guide rail 6. The resonance plate 1 is used for mounting a test piece 2 and a waveform receiver (not shown) which is used for collecting and detecting an explosion impact simulation signal so as to form an impact response spectrum; the mass block 4 is used for adjusting the natural frequency of the resonance plate 1 so as to generate different explosion impact simulation signals; the impact power assembly 5 comprises an impact hammer 51, a piston push rod 52, an impact cylinder 53 and an air storage cylinder 54, wherein the air storage cylinder 54 and the impact cylinder 53 provide power sources for the pneumatic horizontal impact response spectrum testing machine; the base 3 is used for fixing and supporting the resonant plate 1, the impact power assembly 5, the mass block 4 and the guide rail 6.
The base 3 is fixedly connected to the ground, and the resonance plate 1, the impact power assembly 5, the mass block 4 and the guide rail 6 are all located on the upper surface of the base 3. The resonance plate 1, the mass block 4, the impact hammer 51, the piston push rod 52, the impact cylinder 53 and the air storage tank 54 are sequentially arranged from left to right as shown in fig. 3 or fig. 2, wherein the waveform sensor is arranged at any position of the resonance plate 1. The mass block 4 is connected to the right side of the resonance plate 1, one end of the piston push rod 52 is connected to the impact hammer 51, the other end of the piston push rod 52 is connected to the impact cylinder 53, and the air storage tank 54 is connected to the impact cylinder 53, wherein a distance D exists between the mass block 4 and the impact hammer 51. The guide rail 6 is positioned between the base 3 and the resonance plate 1, the guide rail 6 is fixedly connected to the upper surface of the base 3, and the resonance plate 1 is in sliding connection with the guide rail 6. It should be noted that the air tank 54 is connected to the impact cylinder 53, so that the compressed air in the air tank 54 can enter the impact cylinder 53; the other end of the piston push rod 52 is connected with an impact cylinder 53, so that the compressed gas pushes the piston push rod 52, the piston push rod 52 pushes the impact hammer 51, and the impact hammer 51 collides with the mass block 4; the base 3 is provided with an upper surface and a lower surface, the upper surface and the lower surface are arranged oppositely, and the lower surface is close to the ground; the "right side portion" herein refers to a side portion of the resonance plate 1 near the impact hammer 51, as shown in fig. 2 or 3.
Before the test is performed, the test piece 2 is fixedly attached to the resonator plate 1, for example, the test piece 2 is fastened by screwing.
In the test, the compressed gas from the gas tank 54 is introduced into the impact cylinder 53, and the impact cylinder 53 compresses the compressed gas, so that the piston push rod 52 pushes the impact hammer 51 to move, and the impact hammer 51 strikes the mass 4 on the resonance plate 1. The resonator plate 1 slides along the rail 6, as shown in fig. 2 or 3, and the resonator plate 1 moves to the position of the broken line.
At the instant when the hammer 51 strikes the mass 4, the resonator plate 1 is excited to produce an explosion impact analog signal, which is collected and detected by a waveform receiver. And forming an impact response spectrum according to the explosion impact simulation signal, comparing the impact spectrum generated by the response with the required impact spectrum, and if the impact spectrum generated by the response is consistent with the required impact spectrum, subjecting the test piece 2 to an explosion impact environment test.
In the next experiment, the impact hammer 51 and the resonant plate 1 need to be reset so that the distance between the impact hammer 51 and the mass 4 is D. For example, as shown in fig. 2 or 3, the resonator plate 1 needs to be returned from the dotted line position to the solid line position. When the large-size resonance plate 1 is reset, multiple persons are needed to cooperate, the labor intensity is high, and the large-size resonance plate easily collides with the test piece 2 during operation, so that the test piece 2 is unnecessarily damaged.
Referring to fig. 3 and 4, the pneumatic horizontal impact response spectrum tester further includes a fixing device 7, and the fixing device 7 may make the resonance plate 1 remain stationary at a moment before being impacted. For example, before the impact hammer 51 impacts the mass 4 on the resonance plate 1, the resonance plate 1 may shake back and forth due to external interference, thereby affecting the validity and accuracy of the test data. In the "front and rear" herein, the front means the a position shown in fig. 2, and the rear means the B position shown in fig. 2.
Specifically, the pneumatic horizontal impact response spectrum testing machine comprises two fixing devices 7, wherein the two fixing devices 7 are respectively arranged on the front side and the rear side of the resonance plate 1, and the fixing devices 7 are fixedly connected to the upper surface of the base 3. The fixing device 7 includes a cylinder 71 and a link 72, the cylinder 71 having a connection end 711, the connection end 711 being driven to reciprocate linearly by compressing air inside the cylinder 71. The connecting member 72 is used for connecting the resonator plate 1 and the connecting end 711, and the connecting member 72 is fixedly connected with the resonator plate 1, for example, welded, riveted or screwed; the connecting member 72 is detachably connected to the connecting end 711, for example, by a screw connection, a snap connection, a key connection, a pin connection, or the like. The connecting member 72 may be a bent plate, a cylinder, or a flat plate or other suitable shape. Here, "front side" means a position a as shown in fig. 2, and "rear side" means a position B as shown in fig. 2.
Before the test, the connection end 711 is connected to the connection member 72, for example, the connection member 72 is provided with a hole with internal threads, the connection end 711 is provided with external threads, and the connection member 72 is in threaded connection with the connection end 711. The connection end 711 is controlled by the cylinder 71, so that the distance between the resonance plate 1 and the impact hammer 51 can be controlled. At this interval D, the connection between the connection end 711 and the connection member 72 is released, for example, the connection member 72 is screwed to the connection end 711, so that the resonance plate 1 has the same degree of freedom as the movement direction of the impact hammer 51. Before the connection relationship between the connection end 711 and the connection member 72 is released, the connection relationship can limit the vibration of the resonance plate 1 in the front-back direction, so that the resonance plate 1 is kept relatively static before being collided, and the accuracy of test data is favorably ensured. It should be noted that the "front and back" explanation here is the same as the "front and back" explanation described above.
After the test is finished, the stroke of the connecting end 711 is controlled, and then the distance between the resonance plate 1 and the impact hammer 51 is ensured to be D, so that the resonance plate 1 is restored to the initial position, and the next test is performed. The stroke of control link 711 can be fast, convenient realization resonant panel 1 reset, replaces manual operation, reduces operator's intensity of labour, avoids the test piece 2 that the human factor leads to simultaneously colliding with.
The fixing device 7 enables the resonance plate 1 to keep relatively static before being collided, and is beneficial to ensuring the accuracy of test data; the labor intensity of an operator is reduced, and meanwhile, the collision of the test piece 2 caused by human factors is avoided.
Referring to fig. 4, in one embodiment the connector 72 is a bent plate, which is L-shaped. The connector 72 has a first portion 721 and a second portion 722. The first part 721 is intended for detachable connection to the connection end 711 and the second part 722 is intended for fixed connection to the resonator plate 1. The structure of the connecting piece 72 can meet the two connection requirements, and has the advantages of simple structure, convenient processing and low cost.
Specifically, a first through hole 7211 is opened in the first portion 721, the first through hole 7211 is a circular hole, and the first through hole 7211 allows the connection end 711 to be passed through. The connecting end 711 is circular in cross-section, and the connecting end 711 is provided with an external thread. When the connection end 711 is coupled to the connection member 72, the connection end 711 passes through the first through hole 7211 of the connection member 72, and the nut is threadedly coupled to the external thread of the connection end 711. The nut abuts against the first portion 721, wherein the nut is adjacent to the connection end 711, as shown in fig. 4. The arrangement mode realizes the detachable connection of the connecting piece 72 and the connecting end 711; the processing is convenient, and the cost is low; the nut is fastened or loosened, and the method is simple and convenient.
A second through hole 7221 is provided in the second part 722, which through hole 7221 is adapted to cooperate with a hole in the resonator plate 1, so that a fastening member, such as a bolt or a screw, is passed through the second through hole 7221 and the hole in the resonator plate 1 to fixedly attach the connecting member 72 to the resonator plate 1.
For further optimization scheme, link 711 and first through-hole 7211 clearance fit, circular cross sectional area slightly is lighter than the area of circular port promptly for link 711 can easily insert first through-hole 7211, avoids accomplishing with the help of the frock and inserts the operation. In practical application, the diameter of the connection end 711 is 27mm, the diameter of the first through hole 7211 is 28mm, and the gap between the connection end 711 and the first through hole 7211 is 0.5mm in consideration of the test precision and the machining process. The requirement of test precision is met, meanwhile, the gap is increased to the maximum extent, and the connecting end 711 can be easily inserted into the first through hole 7211; and the process requirement can be reduced, and the processing is convenient.
Preferably, the stroke of the connecting end 711 of the air cylinder 71 is at least 90mm, which is beneficial to the connecting end 711 to conveniently realize the resetting of the resonance plate 1.
Preferably, the inflation pressure of the cylinder 71 can be adjusted between 0.1-10 MPa, so as to expand the initial speed range of the impact hammer 51.
The above embodiments are merely illustrative of the technical solutions of the present invention and not restrictive, and although the present invention is described in detail with reference to the embodiments, those skilled in the art should understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A fixing device of a pneumatic horizontal resonance plate is characterized by comprising a connecting piece and a cylinder,
the cylinder can stretch out and draw back to make the connecting end of the cylinder reciprocate,
the connecting piece is used for connecting link and resonance panel, the connecting piece with the link can be dismantled and be connected, the connecting piece with resonance panel fixed connection.
2. The pneumatic horizontal resonator plate fixing device according to claim 1,
the connecting piece is provided with a first through hole which can be penetrated by the connecting end, and the connecting end is provided with an external thread.
3. The pneumatic horizontal resonator plate fixing device according to claim 2,
the connecting end is in clearance fit with the first through hole.
4. The pneumatic horizontal resonator plate fixing device according to claim 3,
the section of the connecting end is circular, the diameter of the connecting end is 27mm,
the first through hole is a round hole, and the diameter of the first through hole is 28 mm.
5. A pneumatic horizontal resonance plate fixing device as claimed in any one of claims 2 to 4,
the connecting piece is L-shaped and comprises a first part connected with the connecting end and a second part connected with the resonance plate,
the first portion is provided with the first through hole, and the second portion is provided with the second through hole.
6. The pneumatic horizontal resonator plate fixing device according to claim 1,
the stroke of link end is 90mm at least.
7. The pneumatic horizontal resonator plate fixing device according to claim 1,
the inflation pressure of the cylinder is 0.1-10 MPa.
8. A pneumatic horizontal impact response spectrum testing machine, comprising a fixing device of a pneumatic horizontal resonance plate according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010449777.1A CN111579192A (en) | 2020-05-25 | 2020-05-25 | Fixing device of pneumatic type horizontal resonance board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010449777.1A CN111579192A (en) | 2020-05-25 | 2020-05-25 | Fixing device of pneumatic type horizontal resonance board |
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| Publication Number | Publication Date |
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| CN111579192A true CN111579192A (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010449777.1A Pending CN111579192A (en) | 2020-05-25 | 2020-05-25 | Fixing device of pneumatic type horizontal resonance board |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020031442A (en) * | 2000-10-20 | 2002-05-02 | 장근호 | Pyro-Shock Testing Simulator |
| CN102121869A (en) * | 2010-12-03 | 2011-07-13 | 苏州世力源科技有限公司 | Pneumatic shock response spectrum tester |
| CN103604578A (en) * | 2013-11-04 | 2014-02-26 | 北京卫星环境工程研究所 | Large-scale high-magnitude horizontal impact test stand based on pneumatic type |
| CN103759912A (en) * | 2014-01-07 | 2014-04-30 | 北京卫星环境工程研究所 | Pneumatic type horizontal shock platform |
| CN106525373A (en) * | 2016-11-28 | 2017-03-22 | 西安百纳电子科技有限公司 | Horizontal impact response spectrometry apparatus |
| CN208688768U (en) * | 2018-08-06 | 2019-04-02 | 海检检测有限公司 | A kind of shock response spectrum test impact platform |
-
2020
- 2020-05-25 CN CN202010449777.1A patent/CN111579192A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020031442A (en) * | 2000-10-20 | 2002-05-02 | 장근호 | Pyro-Shock Testing Simulator |
| CN102121869A (en) * | 2010-12-03 | 2011-07-13 | 苏州世力源科技有限公司 | Pneumatic shock response spectrum tester |
| CN103604578A (en) * | 2013-11-04 | 2014-02-26 | 北京卫星环境工程研究所 | Large-scale high-magnitude horizontal impact test stand based on pneumatic type |
| CN103759912A (en) * | 2014-01-07 | 2014-04-30 | 北京卫星环境工程研究所 | Pneumatic type horizontal shock platform |
| CN106525373A (en) * | 2016-11-28 | 2017-03-22 | 西安百纳电子科技有限公司 | Horizontal impact response spectrometry apparatus |
| CN208688768U (en) * | 2018-08-06 | 2019-04-02 | 海检检测有限公司 | A kind of shock response spectrum test impact platform |
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Application publication date: 20200825 |
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