CN105953991A - Piezoelectric-hydraulic hybrid broadband vibration bench - Google Patents
Piezoelectric-hydraulic hybrid broadband vibration bench Download PDFInfo
- Publication number
- CN105953991A CN105953991A CN201610412808.XA CN201610412808A CN105953991A CN 105953991 A CN105953991 A CN 105953991A CN 201610412808 A CN201610412808 A CN 201610412808A CN 105953991 A CN105953991 A CN 105953991A
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- CN
- China
- Prior art keywords
- platform
- exciting
- amplifying mechanism
- displacement amplifying
- mounting platform
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Classifications
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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
- G01M7/04—Monodirectional test stands
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
Disclosed in the invention is a piezoelectric-hydraulic hybrid broadband vibration bench comprising a mounting platform, an exciting platform, exciting units and a hydraulic cylinder. The exciting platform arranged horizontally is fixedly connected with a hydraulic rod of the hydraulic cylinder; the mounting platform is arranged above the exciting platform and is fixedly connected with the exciting platform by a plurality of exciting unit; and a testing element is installed on the mounting platform. According to the piezoelectric-hydraulic hybrid broadband vibration bench, with a displacement amplification mechanism, the horizontal displacement of a piezoelectric ceramic unit is converted into longitudinal displacement and the output displacement is amplified, so that high-frequency-band vibration testing on the testing element is completed. Meanwhile, the longitudinal low-frequency displacement is outputted by the hydraulic cylinder and low-frequency-band vibration testing on the testing element is completed; and with the series connection way of the exciting units and the hydraulic cylinder, full-band vibration testing examination of the testing element is completed.
Description
Technical field
The present invention relates to technical field of mechanical environmental test, particularly relate to a kind of piezoelectricity-hydraulic hybrid wideband and shake
Dynamic platform.
Background technology
Dither, dynamic overload, temperature and the impact etc. that weapon and aerospace system experience at flight course
Combinational environment, has complex effects to product structure intensity and reliability, especially vibrates and transships compound,
It is to affect the most significant two kinds of environmental factorss of flying product 26S Proteasome Structure and Function.Along with weapon and Aero-Space cause
Fast development, the mechanism in weapon and aerospace system and electronic equipment are carried out structural strength and function
Reliability Check has become as the emphasis of relevant industries.Currently for weapon and aerospace system product flight environment of vehicle
Vibration test mainly completed by electromagnetic vibration generator system, electromagnetic vibration generator system exists that weight is big and volume is big
Deng major defect.
Summary of the invention
The purpose of the present invention is that provides a kind of piezoelectricity-hydraulic hybrid wideband to solve the problems referred to above
Vibration table.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of piezoelectricity-hydraulic hybrid wideband vibration table, including mounting platform, excitation platform, exciting unit and
Hydraulic cylinder, described excitation platform is fixing with the hydraulic stem of described hydraulic cylinder to be connected, and is horizontally disposed with, described peace
Assembling platform is arranged on the top of described excitation platform, and by multiple described exciting unit and described excitation platform
Fixing connection, described mounting platform is provided with testpieces.
Specifically, described exciting unit includes piezoelectric ceramics and displacement amplifying mechanism, and described piezoelectric ceramics is installed
In described displacement amplifying mechanism, and with described displacement amplifying mechanism interference fit, described displacement amplifying mechanism
Top and bottom all by downside and the upside of described excitation platform of connecting bolt and described mounting platform
Face is fixing to be connected.
Specifically, described displacement amplifying mechanism is loop configuration, the width of the upper end of described displacement amplifying mechanism
With the width that the width of lower end is respectively less than described displacement amplifying mechanism middle-end, described piezoelectric ceramics is horizontally set on
The middle-end of described displacement amplifying mechanism, and the inner side of the two ends of described piezoelectric ceramics and described displacement amplifying mechanism
Face is fixing to be connected, and the length of described piezoelectric ceramics is more than the width of described displacement amplifying mechanism middle-end.
Specifically, the axis of described mounting platform and described excitation platform overlaps, multiple described exciting unit
It is evenly distributed between described mounting platform and described excitation platform.
The beneficial effects of the present invention is:
Piezoelectricity of the present invention-hydraulic hybrid wideband vibration table passes through displacement amplifying mechanism by the level of piezoelectric ceramics
Displacement is converted to length travel, and is amplified by output displacement, completes the vibration examination of the high band to testpieces
Test, simultaneously by the longitudinal low frequency displacement of hydraulic cylinder output, complete the vibration test of the low-frequency range to testpieces,
The form connected by exciting unit and hydraulic cylinder is completed the full frequency band vibration test of testpieces and examines.
Accompanying drawing explanation
Fig. 1 is the structural representation of piezoelectricity of the present invention-hydraulic hybrid wideband vibration table.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
As it is shown in figure 1, one piezoelectricity of the present invention-hydraulic hybrid wideband vibration table, including mounting platform 2,
Excitation platform 7, exciting unit and hydraulic cylinder 6, excitation platform 7 is fixing with the hydraulic stem of hydraulic cylinder 6 to be connected,
And be horizontally disposed with, mounting platform 2 is arranged on the top of excitation platform 7, and by multiple exciting unit with sharp
Shaking, platform 7 is fixing to be connected, and mounting platform 2 is provided with testpieces 1, and exciting unit includes piezoelectric ceramics 5 He
Displacement amplifying mechanism 3, piezoelectric ceramics 5 is arranged in displacement amplifying mechanism 3, and with displacement amplifying mechanism 3 mistake
Being full of cooperation, the top and bottom of displacement amplifying mechanism 3 are all by the downside of connecting bolt 4 with mounting platform 2
The upper side of face and excitation platform 7 is fixing to be connected, and displacement amplifying mechanism 3 is loop configuration, displacement equations machine
The width of the upper end of structure 3 and the width of lower end are respectively less than the width of displacement amplifying mechanism 3 middle-end, piezoelectric ceramics 5
It is horizontally set on the middle-end of displacement amplifying mechanism 3, and the two ends of piezoelectric ceramics 5 and displacement amplifying mechanism 3
Medial surface is fixing to be connected, and the length of piezoelectric ceramics 5, more than the width of displacement amplifying mechanism 3 middle-end, is installed flat
The axis of platform 2 and excitation platform 7 overlaps, and multiple exciting unit are evenly distributed on mounting platform 2 and exciting
Between platform 7.
The operation principle of piezoelectricity of the present invention-hydraulic hybrid wideband vibration table is as follows:
Testpieces 1 is arranged on mounting platform 2, is produced by piezoelectric ceramics 5 and moves back and forth generation exciting force,
And pass through the displacement equations that piezoelectric ceramics 5 is exported by displacement amplifying mechanism 3, piezoelectric ceramics 5 elongation makes
Testpieces 1 produces downward thrust, and displacement amplifying mechanism 3 resilience produces thrust upwards, thus complete right
The vibration test examination of the high band of testpieces 1；By utilizing the feature that hydraulic cylinder 6 output displacement is bigger,
Make hydraulic cylinder 6 drive excitation platform 7, exciting unit and mounting platform 2 to move up and down, complete testpieces 1
The examination of low-frequency tests.
Piezoelectric ceramics 5 is the exciting source of high band excitation system, and hydraulic cylinder 6 is swashing of low-frequency range excitation system
Vibration source, high band excitation system and low-frequency range excitation system are connected, are completed testpieces 1 by this vibration table
Full frequency band exciter test is examined.
Technical scheme is not limited to the restriction of above-mentioned specific embodiment, every technology according to the present invention
The technology deformation that scheme is made, within each falling within protection scope of the present invention.
Claims (4)
1. piezoelectricity-hydraulic hybrid wideband vibration table, it is characterised in that: include mounting platform, exciting
Platform, exciting unit and hydraulic cylinder, described excitation platform is fixing with the hydraulic stem of described hydraulic cylinder to be connected, and
Being horizontally disposed with, described mounting platform is arranged on the top of described excitation platform, and by multiple described exciting lists
First and described excitation platform is fixed and is connected, and described mounting platform is provided with testpieces.
Piezoelectricity the most according to claim 1-hydraulic hybrid wideband vibration table, it is characterised in that: institute
State exciting unit and include that piezoelectric ceramics and displacement amplifying mechanism, described piezoelectric ceramics are arranged on described displacement equations
In mechanism, and with described displacement amplifying mechanism interference fit, the top and bottom of described displacement amplifying mechanism are equal
It is connected by connecting bolt is fixing with the upper side of the downside of described mounting platform and described excitation platform.
Piezoelectricity the most according to claim 2-hydraulic hybrid wideband vibration table, it is characterised in that: institute
Stating displacement amplifying mechanism is loop configuration, and the width of the upper end of described displacement amplifying mechanism and the width of lower end are equal
Less than the width of described displacement amplifying mechanism middle-end, described piezoelectric ceramics is horizontally set on described displacement equations machine
The middle-end of structure, and the medial surface of the two ends of described piezoelectric ceramics and described displacement amplifying mechanism is fixing is connected, institute
State the length width more than described displacement amplifying mechanism middle-end of piezoelectric ceramics.
Piezoelectricity the most according to claim 1-hydraulic hybrid wideband vibration table, it is characterised in that: institute
The axis stating mounting platform and described excitation platform overlaps, and multiple described exciting unit are evenly distributed on described
Between mounting platform and described excitation platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412808.XA CN105953991A (en) | 2016-06-14 | 2016-06-14 | Piezoelectric-hydraulic hybrid broadband vibration bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412808.XA CN105953991A (en) | 2016-06-14 | 2016-06-14 | Piezoelectric-hydraulic hybrid broadband vibration bench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105953991A true CN105953991A (en) | 2016-09-21 |
Family
ID=56905441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610412808.XA Pending CN105953991A (en) | 2016-06-14 | 2016-06-14 | Piezoelectric-hydraulic hybrid broadband vibration bench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105953991A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082053A (en) * | 2019-06-05 | 2019-08-02 | 中国工程物理研究院总体工程研究所 | The wideband excitation system based on embedded hydraulic cylinder under degree of being suited to speed up environment |
| CN110174228A (en) * | 2019-06-28 | 2019-08-27 | 中铁二院工程集团有限责任公司 | Magnetic Fuliang rail structure wideband exciter test device |
-
2016
- 2016-06-14 CN CN201610412808.XA patent/CN105953991A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082053A (en) * | 2019-06-05 | 2019-08-02 | 中国工程物理研究院总体工程研究所 | The wideband excitation system based on embedded hydraulic cylinder under degree of being suited to speed up environment |
| CN110082053B (en) * | 2019-06-05 | 2023-11-10 | 中国工程物理研究院总体工程研究所 | Broadband excitation system based on embedded hydraulic cylinder and suitable for acceleration environment |
| CN110174228A (en) * | 2019-06-28 | 2019-08-27 | 中铁二院工程集团有限责任公司 | Magnetic Fuliang rail structure wideband exciter test device |
| CN110174228B (en) * | 2019-06-28 | 2024-01-30 | 中铁二院工程集团有限责任公司 | Broadband excitation test device for magnetic levitation beam rail structure |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160921 |