CN204201363U - Frequency-adjustable formula pipeline dynamic vibration absorber - Google Patents
Frequency-adjustable formula pipeline dynamic vibration absorber Download PDFInfo
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- CN204201363U CN204201363U CN201420609224.8U CN201420609224U CN204201363U CN 204201363 U CN204201363 U CN 204201363U CN 201420609224 U CN201420609224 U CN 201420609224U CN 204201363 U CN204201363 U CN 204201363U
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- frequency
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- dynamic vibration
- pipeline
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Abstract
The utility model relates to a kind of frequency-adjustable dynamic vibration absorber reducing pipeline vibration level, belongs to technical field of vibration absorption.This frequency-adjustable formula pipeline dynamic vibration absorber comprises a pair pipeline retaining member (1) linked together by the first bolt (2), the first nut (3); Described a pair N number of fluting spring sheet (4) of the outside uniform installation of pipeline retaining member (1); (4) can be moved realize frequency modulation on spring film trap by mass block (7); Wherein N is 3-6.This model utility structure is simple, easy for installation, and can carry out frequency adjustment, can meet the vibration damping work under different pipe-line system frequency of okperation.
Description
Art
The utility model relates to a kind of frequency-adjustable dynamic vibration absorber reducing pipeline vibration level, belongs to technical field of vibration absorption.
Background technique
At present, dynamic vibration absorber is a kind of passive oscillation damping method relatively less to installation conditions dependence, it effectively can solve and cannot apply clip and change the problems such as tubular, but the method is only when dynamic vibration absorber natural frequency is identical with pipe fitter's working frequency, and effectiveness in vibration suppression is just obvious.For different pipe-line systems, their frequency of okperation is different, like this will for manufacturing dynamic vibration absorber corresponding to various frequency of okperation with it, very loaded down with trivial details.
Model utility content
The deficiency of multiple pipeline vibration damping work can not be met in order to overcome existing dynamic vibration absorber simultaneously, the utility model is based on the basic thought of anti-resonance, have devised a kind of frequency modulation dynamic vibration absorber, structure is simple, easy for installation, and can frequency adjustment be carried out, the vibration damping work under different pipe-line system frequency of okperation can be met.
A kind of frequency-adjustable formula pipeline dynamic vibration absorber, this frequency-adjustable formula pipeline dynamic vibration absorber comprises a pair pipeline retaining member linked together by the first bolt, the first nut; The N number of fluting spring sheet of the outside uniform installation of described a pair pipeline retaining member; Spring sheet fluting is provided with additional mass; Wherein N is 3-6, it is characterized in that: above-mentioned additional mass is removable on spring sheet fluting, and position is adjustable.
The design method of described frequency-adjustable formula pipeline dynamic vibration absorber, it is characterized in that comprising the following steps: step 1, carry out mould measurement to pipeline, draw pipeline each rank natural frequency, natural frequency close with vibration source frequency of okperation in the natural frequency of each rank is the frequency needing vibration damping; Step 2, to be emulated by three-dimensional software, by constantly changing the position of mass block on spring sheet and substituting in finite element software the relation of carrying out between frequency that modal analysis draws mass block mobile position and frequency-adjustable formula pipeline dynamic vibration absorber; Step 3, according to the position of step 2 quality of regulation block on spring sheet, the frequency making frequency-adjustable formula pipeline dynamic vibration absorber is the frequency needing vibration damping; Step 4, pipeline vibration amplitude maximum position folder on frequency-adjustable formula pipeline dynamic vibration absorber.
The utility model solves the technological scheme that its technical problem adopts: designed frequency modulation dynamic vibration absorber, its structure adopts bolt to fix, and is mounted on pipeline.Spring sheet is slotted, and is reached the object of frequency modulation by the adjustment position of mass block on spring sheet.
The beneficial effects of the utility model are, are applicable to the pipeline vibration damping work under multiple different operating frequency, and be easy to install, reliability is high, do not rely on pipeline environment.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1---the vibration insulating system of frequency-adjustable formula pipeline dynamic vibration absorber schematic diagram;
Fig. 2---the subtense angle of frequency-adjustable formula pipeline dynamic absorber schematic diagram;
Fig. 3---the schematic diagram of frequency-adjustable formula pipeline dynamic vibration absorber;
Fig. 4---spring sheet shape;
Fig. 5---example piping;
Fig. 6---example piping 76Hz is without frequency-adjustable formula pipeline dynamic vibration absorber and have frequency-adjustable formula pipeline dynamic vibration absorber acceleration comparison diagram;
Fig. 7---example piping 101.3Hz is without frequency-adjustable formula pipeline dynamic vibration absorber and have frequency-adjustable formula pipeline dynamic vibration absorber acceleration comparison diagram;
Number in the figure title: 1 clamping structure, 2 first bolts, 3 first nuts, 4 frequency-adjustable formula spring sheets, 5 screws, 6 additional masses, 7 second bolts, 8 frequency-adjustable formula pipeline dynamic vibration absorbers, 9 vibrating tables, the acceleration of unpowered bump leveller under 1076Hz, the acceleration of dynamic bump leveller under 1176Hz, the acceleration of unpowered bump leveller under 12101.3Hz, the acceleration of dynamic bump leveller under 13101.3Hz.
Embodiment
As shown in Figure 3 and Figure 4, the utility model comprises clamping structure 1, multiple spring sheet 4, the additional mass 6 identical with spring sheet quantity: clamping structure 1 for can subdivision structure, be linked together by two bolt 2 nuts 3; Described clamping structure outside by multiple spring sheets 4 of the installation of screw 5 symmetry, the additional mass 6 making the support stiffness of circumference and damping isotropy, installed by bolt 7 nut 3 with described spring sheet.Because frequency modulation dynamic vibration absorber will work under dynamic load environment, so spring sheet have employed the spring steel 65Mn that elasticity is better and yield strength is higher, its thickness is at 1.5mm, and global shape is flat cuboid.Inner ring retaining member have employed the less alloy aluminum of density 6061; Circumferential then fix 4 mass blockes by 4 spring sheets being in right angle.Mass block is bolted in spring sheet groove, and can move in groove.
The inner ring cambered surface of described clamping structure 1 will be slightly less than the cambered surface of semicircle.Ensure clamping structure 1 can be very stable clamping in pipeline.
By three-dimensional software modeling and finite element analysis software, and carry out experimental verification and can show that the relation of this frequency-adjustable formula pipeline dynamic vibration absorber mass block between the position and frequency at spring sheet fluting place is as table 1.
Table 1 mass block is the results list between the position and frequency at spring sheet fluting place
When by mass block, on spring sheet, the movement of position is adjusted to identical with the frequency of okperation of piping the frequency of frequency-adjustable formula pipeline dynamic vibration absorber, effectiveness in vibration suppression is the most obvious.Fig. 6 is that example piping unpowered bump leveller under frequency of okperation 76Hz contrasts with acceleration steady-state response when having frequency-adjustable formula pipeline dynamic vibration absorber (being adjusted to 76Hz).Fig. 7 is that example piping unpowered bump leveller under frequency of okperation 101.3Hz contrasts with acceleration steady-state response when having frequency-adjustable formula pipeline dynamic vibration absorber (being adjusted to 101.3Hz).Comparison diagram 6 and Fig. 7, on folder after frequency-adjustable formula pipeline dynamic vibration absorber, vibration acceleration reduces obviously, reaches good effectiveness in vibration suppression.
Principle is introduced in detail
Frequency-adjustable formula pipeline dynamic vibration absorber is by mass block, spring, the vibration system of damper composition, and it is generally hang to be arranged on to need, in the system of vibration damping, not need additional support.Due to pipe diameter and clamping structure
Inner circle equal diameters, in order to clamping pipe, can excise 1mm by retaining member respectively along docking plane, thus make the inner ring cambered surface of clamping structure be slightly less than pipeline exterior arc surface, thus ensure clamping pipe, as shown in Figure 1.
Its working mechanism is, when structural vibration, drive the vibration of frequency-adjustable formula pipeline dynamic vibration absorber, the inertial force that its motion produces reacts in structure again, thus effectively suppresses the vibration of main structure simultaneously.
We call main system original system, and frequency-adjustable formula pipeline dynamic vibration absorber is called subtense angle, because dynamic damper is single degree of freedom system, so it and main structure form a coupled system after combining, as shown in Figures 1 and 2.Wherein m
1, c
1, k
1be respectively the quality of main structure, damping and spring rate; m
2, c
2, k
2for the quality of bump leveller, damping and spring rate.Subtense angle is separated with main system, if being transformed to the Fourier of relay p (t) of subtense angle and main system
Wherein U
1(ω) and U
2(ω) be main system displacement components u respectively
1(t) and subtense angle displacement components u
2t the Fourier conversion of (), by principle of dynamics, can obtain m
1the initial point frequency response function at place is
Wherein ω is excited frequency, and its key character is: if energizing frequency meets
then | H
11(ω) |=0.Namely when external excitation frequency is equal with the natural frequency of subtense angle, quality m
1to not vibrate, namely frequency-adjustable formula pipeline dynamic vibration absorber utilizes this principle to carry out absorbing to main system.
Claims (1)
1. a frequency-adjustable formula pipeline dynamic vibration absorber,
This frequency-adjustable formula pipeline dynamic vibration absorber comprises a pair pipeline retaining member (1) linked together by the first bolt (2), the first nut (3); Described a pair N number of fluting spring sheet (4) of the outside uniform installation of pipeline retaining member (1); Spring sheet (4) fluting is provided with additional mass (7); Wherein N is 3-6, it is characterized in that: above-mentioned additional mass (7) is removable on spring sheet (4) fluting, and position is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420609224.8U CN204201363U (en) | 2014-10-21 | 2014-10-21 | Frequency-adjustable formula pipeline dynamic vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420609224.8U CN204201363U (en) | 2014-10-21 | 2014-10-21 | Frequency-adjustable formula pipeline dynamic vibration absorber |
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| Publication Number | Publication Date |
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| CN204201363U true CN204201363U (en) | 2015-03-11 |
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| CN201420609224.8U Active CN204201363U (en) | 2014-10-21 | 2014-10-21 | Frequency-adjustable formula pipeline dynamic vibration absorber |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972370A (en) * | 2016-05-27 | 2016-09-28 | 哈尔滨工程大学 | Novel variable-rigidity semi-active pipeline vibration absorber |
| CN107448687A (en) * | 2017-09-07 | 2017-12-08 | 中国船舶重工集团公司第七〇九研究所 | A kind of three-dimensional double frequency pipeline shock-absorbing means |
| CN111457187A (en) * | 2020-05-09 | 2020-07-28 | 江苏方天电力技术有限公司 | Pipeline vibration damper and configuration method thereof |
| CN112664746A (en) * | 2020-12-24 | 2021-04-16 | 山东大学 | Three-way frequency-adjustable vibration reduction device for conveying pipe, conveying system and method |
| CN113175563A (en) * | 2021-04-13 | 2021-07-27 | 江苏科技大学 | Self-adjusting ship pipeline vibration damping device and vibration damping method thereof |
| CN114251413A (en) * | 2020-09-25 | 2022-03-29 | 上海微电子装备（集团）股份有限公司 | Vibration damping device |
| CN114370532A (en) * | 2022-01-11 | 2022-04-19 | 福州大学 | Variable-mass dynamic vibration absorber suitable for high-temperature pipeline and assembling method |
-
2014
- 2014-10-21 CN CN201420609224.8U patent/CN204201363U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972370A (en) * | 2016-05-27 | 2016-09-28 | 哈尔滨工程大学 | Novel variable-rigidity semi-active pipeline vibration absorber |
| CN105972370B (en) * | 2016-05-27 | 2018-10-26 | 哈尔滨工程大学 | A kind of half active pipeline bump leveller of novel variation rigidity |
| CN107448687A (en) * | 2017-09-07 | 2017-12-08 | 中国船舶重工集团公司第七〇九研究所 | A kind of three-dimensional double frequency pipeline shock-absorbing means |
| CN111457187A (en) * | 2020-05-09 | 2020-07-28 | 江苏方天电力技术有限公司 | Pipeline vibration damper and configuration method thereof |
| CN111457187B (en) * | 2020-05-09 | 2021-04-27 | 江苏方天电力技术有限公司 | Pipeline vibration damper and configuration method thereof |
| CN114251413A (en) * | 2020-09-25 | 2022-03-29 | 上海微电子装备（集团）股份有限公司 | Vibration damping device |
| CN112664746A (en) * | 2020-12-24 | 2021-04-16 | 山东大学 | Three-way frequency-adjustable vibration reduction device for conveying pipe, conveying system and method |
| CN113175563A (en) * | 2021-04-13 | 2021-07-27 | 江苏科技大学 | Self-adjusting ship pipeline vibration damping device and vibration damping method thereof |
| CN114370532A (en) * | 2022-01-11 | 2022-04-19 | 福州大学 | Variable-mass dynamic vibration absorber suitable for high-temperature pipeline and assembling method |
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