CN202547769U - Apparatus for testing bellows vibration isolation performance under free condition - Google Patents
Apparatus for testing bellows vibration isolation performance under free condition Download PDFInfo
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- CN202547769U CN202547769U CN2012200164417U CN201220016441U CN202547769U CN 202547769 U CN202547769 U CN 202547769U CN 2012200164417 U CN2012200164417 U CN 2012200164417U CN 201220016441 U CN201220016441 U CN 201220016441U CN 202547769 U CN202547769 U CN 202547769U
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- corrugated tube
- vibration
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- bellows
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Abstract
The utility model relates to an apparatus for testing bellows vibration isolation performance under a free condition. The testing apparatus includes a vibration exciter, the vibration output end of the vibration exciter is provided with a fixed connection device, the fixed connection device fixedly connects to one end of a vertically arranged bellows, the vibration direction of the vibration exciter and the extension direction of the bellows are parallel, the testing apparatus further includes sensors respectively arranged at the two ends of the bellows, and the sensors can be at least one of accelerometers, speedtransmitters and displacement sensors. The testing apparatus adopts the vibration exciter to excitate the bellows under the free condition and to measure the vibration parameters of the two ends of the bellows, after the vibration parameters are calculated, the vibration isolation performance parameters of the bellows under the free condition can be accurately obtained, and the parameters provide an important basis for the design and use of the vibration isolation bellows under the free condition.
Description
Technical field
The utility model relates to corrugated tube anti-vibration performance test unit and test method under a kind of free operating mode, belongs to the mechanical strength test technical field.
Background technology
The test of corrugated tube anti-vibration performance is in order to obtain the anti-vibration performance parameter of corrugated tube under free operating mode.Corrugated tube is as a kind of vibration isolation element, and corrugated tube anti-vibration performance parameter is the important design parameter of vibration isolation corrugated tube.At present, the anti-vibration performance to corrugated tube mainly still reflects through the damping of corrugated tube.
The utility model content
The purpose of the utility model provides corrugated tube anti-vibration performance test unit under a kind of free operating mode, can obtain the corrugated tube anti-vibration performance parameter (vibration transmissibility) under free operating mode.
For realizing above-mentioned purpose; The device scheme of the utility model is: corrugated tube anti-vibration performance test unit under the free operating mode; Comprise a vibrator; The vibration output terminal of vibrator is provided with a fixed connection apparatus, and this fixed connection apparatus is used for fixing an end that connects the corrugated tube of vertically placing, and the direction of vibration of vibrator is parallel with the corrugated tube bearing of trend; Said test unit also comprises the sensor that is separately positioned on the corrugated tube two ends, and said sensor is at least a in acceleration transducer, speed pickup, the displacement transducer.
Said test unit also is provided with the elasticity lanyard that is used to suspend in midair corrugated tube.
End away from the suspention corrugated tube of said elasticity lanyard is fixed on and is arranged on the vibrator column on every side.Said elasticity lanyard is fixed on the following end flanges of corrugated tube.Said elasticity lanyard is a rubber rope.
The beneficial effect of the utility model is: the utility model utilizes vibrator to encourage the corrugated tube under the free operating mode; The vibration parameters at measuring bellows two ends; Can obtain exactly after calculating corrugated tube under free operating mode the anti-vibration performance parameter, these parameters are that the design of vibration isolation corrugated tube under the free operating mode is used important basis is provided.
Description of drawings
Fig. 1 is the test unit synoptic diagram of the utility model;
Fig. 2 is grade drop that shakes of the corrugated tube under the different frequency.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
Corrugated tube anti-vibration performance test method under the free operating mode comprises the steps: corrugated tube vertically is placed on a vibrator top, is connected the corrugated tube lower end with vibrator vibration output terminal with connecting rod; Make the vibrator starting of oscillation, drive the corrugated tube vibration; Vibration acceleration, speed or the displacement at measuring bellows two ends simultaneously.
Obtained acceleration, speed or the displacement at corrugated tube two ends, calculated and just can learn corrugated tube anti-vibration performance parameter.Use formula: D=A1/A2 and LD=20Lg (D) to calculate grade drop that shakes at corrugated tube two ends; A2 is link to each other with vibrator vibration acceleration, speed or the displacement of an end, A
1Vibration acceleration, speed or displacement for the other end; Grade drop that shakes under different excitation frequencies can be obtained through calculating, the corrugated tube anti-vibration performance can be judged according to grade drop that shakes that obtains.
Based on above method, provide a kind of test unit below.
As shown in Figure 1, corrugated tube 1 a two ends difference mounting flange 2,4, the corrugated tube anti-vibration performance test unit under the free operating mode comprises a vibrator; Vibrator is placed on the ground; The vibration output terminal of vibrator connects exciting crossbeam 6 through a connecting rod 7 (steel bar), and exciting crossbeam 6 is fixed on the flange 4, vibration output terminal and corrugated tube 1 coaxial setting; The direction of vibration of vibrator is parallel with corrugated tube 1 bearing of trend, is vertical direction; Test unit also comprises the sensor 3,5 that is separately positioned on 1 liang of end flanges of corrugated tube, and sensor 3,5 is at least a in acceleration transducer, speed pickup, the displacement transducer.
In order to make the free operating mode of being in of corrugated tube; And make corrugated tube when vibration, be in vertical state all the time; One group of elasticity lanyard 10 that is used to suspend in midair corrugated tube also need be set, and elasticity lanyard 10 1 ends must be suspended on the corrugated tube lower flange 4, and the other end is fixed on the column 11.The selection of elasticity lanyard 10 at first should be able to be born corrugated tube part weight, but also can not influence the free vibration of corrugated tube, so the rigidity of elasticity lanyard can not be too big, can not be too little, and in the present embodiment, select rubber rope as elasticity lanyard 10.
Except column, the stiff end of elasticity lanyard also can be fixed on fixed in place device such as the buildings.
The test concrete steps are following:
1, corrugated tube test specimen and test unit are assembled;
2, sensor installation is connected sensor with charge amplifier, charge amplifier is connected with data acquisition unit again;
3, data acquisition unit links to each other with computing machine;
4, vibrator is placed on the ground, links to each other with exciting crossbeam on the corrugated tube lower flange through steel bar;
5, vibrator links to each other with power amplifier, and power amplifier links to each other with signal generator, the sine wave of signal generator output different frequency;
6, be contained in corrugated tube up and down the sensor on two end flanges vibration acceleration signal that receives is passed to computing machine through data acquisition unit, get off signal record through data processing software.Obtain the anti-vibration performance parameter (a grade drop shakes) of corrugated tube through processing to vibration signal.
In the present embodiment, sensor the 3, the 5th, acceleration transducer.
The ratio that be defined as corrugated tube upper and lower vibratory response of grade drop than D shakes.
In the formula A is being installed under the situation of acceleration transducer
1The vibration acceleration of-corrugated tube upper end;
A
2The vibration acceleration of-corrugated tube lower end;
When representing, can get shake grade drop or be called transmission loss (Transmission loss) of acceleration with dB:
L
D＝20Lg(D)
This test can obtain at the shake grade drop of corrugated tube under the different excitation frequencies under free operating mode.
Vibrator applies excited by impact to the exciting crossbeam through steel bar, excitation is passed to corrugated tube through the exciting crossbeam, makes whole corrugated tube produce vibration.Produce the sinusoidal signal from 1Hz to 1000Hz through signal generator, signal passes to vibrator via power amplifier and makes its vibration.Measure response data by sensor-charge amplifier-portable signal processing instrument.Obtain each the Frequency point corrugated tube acceleration oscillating curve at two ends up and down in 1～1000Hz scope through acceleration transducer; Obtain the peak averaging value of these two curves respectively with data processing software, the speed of each Frequency point is shaken, and
is as shown in Figure 2 for a grade drop.
Adopt acceleration transducer, can access the acceleration grade drop that shakes, in like manner, adopt speed pickup, the speed that can the access grade drop that shakes adopts displacement transducer, can access the displacement grade drop that shakes, because principle is identical with the measurement acceleration, repeats no more at this.
Claims (5)
1. corrugated tube anti-vibration performance test unit under the free operating mode; It is characterized in that; Comprise a vibrator; The vibration output terminal of vibrator is provided with a fixed connection apparatus, and this fixed connection apparatus is used for fixing an end that connects the corrugated tube of vertically placing, and the direction of vibration of vibrator is parallel with the corrugated tube bearing of trend; Said test unit also comprises the sensor that is separately positioned on the corrugated tube two ends, and said sensor is at least a in acceleration transducer, speed pickup, the displacement transducer.
2. corrugated tube anti-vibration performance test unit is characterized in that under the free operating mode according to claim 1, and said test unit also is provided with the elasticity lanyard that is used to suspend in midair corrugated tube.
3. corrugated tube anti-vibration performance test unit is characterized in that under the free operating mode according to claim 2, and the end away from the suspention corrugated tube of said elasticity lanyard is fixed on and is arranged on the vibrator column on every side.
4. corrugated tube anti-vibration performance test unit is characterized in that under the free operating mode according to claim 2, and said elasticity lanyard is fixed on the following end flanges of corrugated tube.
5. according to corrugated tube anti-vibration performance test unit under claim 2 or the 3 described free operating modes, it is characterized in that said elasticity lanyard is a rubber rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200164417U CN202547769U (en) | 2012-01-15 | 2012-01-15 | Apparatus for testing bellows vibration isolation performance under free condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200164417U CN202547769U (en) | 2012-01-15 | 2012-01-15 | Apparatus for testing bellows vibration isolation performance under free condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202547769U true CN202547769U (en) | 2012-11-21 |
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ID=47168387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200164417U Expired - Fee Related CN202547769U (en) | 2012-01-15 | 2012-01-15 | Apparatus for testing bellows vibration isolation performance under free condition |
Country Status (1)
| Country | Link |
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| CN (1) | CN202547769U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680075A (en) * | 2012-01-15 | 2012-09-19 | 河南科技大学 | Device and method for testing vibration isolation performance of corrugated pipe under free work condition |
| GB2537365A (en) * | 2015-04-13 | 2016-10-19 | Fuchs Anton | Method and device for efficient determination of the vibro-acoustic properties of sound insulation materials |
-
2012
- 2012-01-15 CN CN2012200164417U patent/CN202547769U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680075A (en) * | 2012-01-15 | 2012-09-19 | 河南科技大学 | Device and method for testing vibration isolation performance of corrugated pipe under free work condition |
| GB2537365A (en) * | 2015-04-13 | 2016-10-19 | Fuchs Anton | Method and device for efficient determination of the vibro-acoustic properties of sound insulation materials |
| GB2537365B (en) * | 2015-04-13 | 2018-04-25 | Kompetenzzentrum Das Virtuelle Fahrzeug | Method and device for efficient determination of the vibro-acoustic properties of sound insulation materials |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20150115 |
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| EXPY | Termination of patent right or utility model |