CN100491796C - Method for removing low frequency vibration solid transferred noise - Google Patents
Method for removing low frequency vibration solid transferred noise Download PDFInfo
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- CN100491796C CN100491796C CNB2007100276030A CN200710027603A CN100491796C CN 100491796 C CN100491796 C CN 100491796C CN B2007100276030 A CNB2007100276030 A CN B2007100276030A CN 200710027603 A CN200710027603 A CN 200710027603A CN 100491796 C CN100491796 C CN 100491796C
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- bellows
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- spring washer
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Abstract
The invention relates to a method on eliminating the noise which is transferred by the low-frequency vibration solid between the vibrating source and the connecting pipe, and is suitable for the system which adopts a corrugated pipe or a flexible rubber joint to isolate the vibration and denoise between the different kinds of high-speed or low-speed mechanical pumps and the connecting pipes, at least two steel spring rubber snubbers are connected in series along the periphery of the corrugated pipe or the flexible rubber joint by a connecting bracket, the original limiting and fixing screw rod needs not to be removed, the upper and the lower lock nuts of the limiting and fixing screw rod only needs to be loosened for 10mm respectively; the invention has the advantages of simple and convenient installation, low cost and distinct effect in vibration isolation and noise reduction.
Description
Technical field
The present invention relates to a kind of harmful mechanical vibration and method of noise eliminated, especially relate to a kind of method that vibration source is passed to the nuisance vibration and the noise of connecting tube of eliminating, belong to field of environment protection.
Background technique
Development along with society, people's living environment quality improves constantly, use the place of central air-conditioning system more and more, the use of various water pumps such as all kinds of cooling chilled water pumps and frequency conversion living pump is also more and more, the work running of these machineries forms vibration source, the capital produces a kind of harmful mechanical vibration and low-frequency noise, especially the pipeline that is connected with these vibration sources, transmitted and produced a kind of low frequency vibration solid transferred noise, disturbed seriously that people live normally, the study and work environment.
At present, eliminate or reduce this harmful mechanical vibration and the method for low frequency vibration solid transferred noise roughly has two kinds: a kind of method is that the base in the various mechanical pump classes of high low-speed running is provided with various forms of vibration pads or vibration isolate ditch is set, this method can only be subdued vibration and the noise between vibration source and the attachment face, another kind method is contact between vibration source and pipeline a kind of have stretchability and flexible bellows or flexible rubber joint, thereby change mechanical vibration source into soft the connection with being rigidly connected of pipeline, to eliminate the rigid of transmission of vibration, make the unlikely generation low frequency vibration solid transferred noise of pipeline.
Bellows is a kind of have stretchability and flexible hollow tube, is formed by metal, plastics or other materials manufacturing, is usually used in soft connection the between vibration source and the pipeline, to play the effect of vibration isolation.Owing to will utilize the stretchability of bellows to be connected with pipeline with elasticity, and the pressure of various pipe interior carrying fluids has nothing in common with each other, thereby preset axial vertical deformation amount before dispatching from the factory, and it is it is spacing fixing with the spacing standing screw of (generally being 4) more than 2, axial or the lateral deformation of unlikely generation, transportation and storage before yet convenient the use do not deform.Rules are used in design and installation according to bellows, and bellows should be removed spacing standing screw and forbid and adjust the pipeline location deviation with the method for bellows distortion after installing.
But, during use since pipeline in crunch, make the bellows lengthening deformation, rigidity strengthens, and bellows is become have certain rigid, thereby the ductility of bellows and the effect of vibration insulation and noise reduction have been reduced, and installation personnel is for unlikely damage bellows, often dare not remove spacing standing screw and with its reservation after installation, therefore, spacing standing screw becomes rigid point of support and makes bellows reduce even lose the effect of vibration insulation and noise reduction greatly.This ubiquity that is bellows in installing and using and insoluble technical problem, a lot of bellowss are in use because the vibration insulation and noise reduction DeGrain, and have to once more whole system be transformed, waste a large amount of human and material resources and financial resources, there is very big defective.
Flexible rubber joint also is a kind of have stretchability and flexible hollow rubber pipe, and the problem and the defective that exist in its installation and the use are similar with bellows.
Summary of the invention
The object of the present invention is to provide a kind of simple and easy to do installation method, solve present bellows and flexible rubber joint ubiquitous vibration insulation and noise reduction DeGrain in installing and using, be difficult to thoroughly to solve the technical problem of the low frequency vibration solid transferred noise of pipeline.
The technical solution used in the present invention is: adopt State Intellectual Property Office's a kind of back pressure type of disclosed utility model patent " steel spring rubber snubber " in 2006 (patent No.: ZL200520062238.3, patentee: Zheng Guoyao), be installed in parallel in bellows or flexible rubber joint periphery with the connection support, utilize " steel spring rubber snubber " can effectively isolate and eliminate the superior function of the low frequency solid-borne sound transmission that mechanical equipment vibration causes, collaborative and overcome bellows or flexible rubber joint existing defective in installing and using, give full play to the anti-vibration performance of bellows or flexible rubber joint, also promptly adopt: the duplex oscillation damping method of " bellows+steel spring rubber snubber " or " flexible rubber joint+steel spring rubber snubber ", the useful double effects that utilizes synergy each other to produce is to reach the purpose of effective vibration insulation and noise reduction.
" steel spring rubber snubber " (patent No.: ZL200520062238.3) by helical steel springs be wrapped in its peripheral rubber sleeve and the pull-rod device, fixing bolt and the tubular shell that are arranged on two rubber columns of helical steel springs upper and lower end and pass two rubber columns and helical steel springs constitute.Helical steel springs has high elasticity, characteristics that natural frequency is low, rubber has vibration damping shock sucking function and the big characteristics of damping constant, steel spring rubber snubber is organically combination of the advantage on vibration damping, anti-vibration performance with steel spring and rubber, has two-fold advantage, quite obviously vibration damping and vibration isolation, noise reduction are arranged in the interfering frequency scope of broad, superior performance is particularly suitable for eliminating the low frequency solid-borne sound transmission that causes because of mechanical vibration.
Installation method of the present invention is: with connecting support steel spring rubber snubber is installed in parallel in bellows or flexible rubber joint periphery, according to the different pressures that carries in the pipeline two above steel spring rubber snubbers are set, before the installation, the precompression of bellows or flexible rubber joint and the spacing standing screw that is provided with for transportation safety need not be removed, still make spacing and safe usefulness, only need on its external limit screw cap with the contact nut of a fastening same specification of spring washer, simultaneously the interior external nut of spacing standing screw is unclamped fixing and locking behind about 10mm, and under the state of the normal operation of vibratory equipment (pump), adjust the suspension pull bar of steel spring rubber snubber, spacing screw rod until bellows or flexible rubber joint unclamps to about 10mm, make bellows or flexible rubber joint become soft connection, touch steel spring rubber snubber with hand simultaneously and hang pull bar one end, should not have obvious vibration and get final product.
Advantage of the present invention is: install simple and convenient; cost is low; vibratory equipment (pump) need not be shut down and adjusting is installed; the vibration insulation and noise reduction effect is remarkable; especially the transformation of the inapparent vibration system of vibration insulation and noise reduction effect for bellows or flexible rubber joint are installed; get instant result especially, have better effect, reach the environmental protection purpose of the most effective elimination low frequency vibration solid transferred noise.
Description of drawings
Below in conjunction with drawings and Examples the present invention is elaborated
Fig. 1 is that the master of steel spring rubber snubber looks cross-sectional schematic;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is that the master before bellows is not installed looks schematic representation;
Fig. 4 is the plan view of Fig. 3;
Fig. 5 is that the master that steel spring rubber snubber and bellows are installed in parallel looks schematic representation;
Fig. 6 is the adjusting method schematic representation of the spacing standing screw of bellows;
Fig. 7 is the plan view of Fig. 5 and Fig. 6;
Fig. 8 is that the master before flexible rubber joint is not installed looks cross-sectional schematic;
Fig. 9 is the plan view of Fig. 8;
Figure 10 is the scheme of installation of steel spring rubber snubber and flexible rubber joint;
Figure 11 is the plan view of Figure 10.
Among the figure:
1, fixing bolt 2, the 4th fastening nut 3, the 5th spring washer
3a, the 4th spring washer 3b, the 4th spring washer 3c, the 3rd spring washer
4, second lock nut 5, cover plate 6, cover plate nut
7, top board nut 8, top board 9, first rubber column
10, center platen 11, helical steel springs 12, rubber sleeve
13, steel spring rubber snubber 13a, steel spring rubber snubber
13b, steel spring rubber snubber 13c, steel spring rubber snubber
14, press table 15, second rubber column 16, the 3rd lock nut
17, the 6th spring washer 17a, the 7th spring washer 17b, the 7th spring washer
17c, the 8th spring washer 18, the 5th fastening nut 19, suspension pull bar
21, the first upper limit hold-doun nut 21a, the second upper limit hold-doun nut 21b, the 3rd upper limit hold-doun nut
21c, the 4th upper limit hold-doun nut 22, bellows upper flange ear 22a, bellows upper flange ear
Lock nut on 22b, bellows upper flange ear 22c, the bellows upper flange ear 23, first
Lock nut 24, bellows upper flange plate on the lock nut 23b, the 3rd on the 23a, first
25, bellows 26, the first spacing standing screw 26a, the second spacing standing screw
26b, the 3rd spacing standing screw 26c, the 4th spacing standing screw 27, first time lock nut
27a, second time lock nut 27b, the 3rd time lock nut 28, bellows lower flange ear
28a, bellows lower flange ear 28b, bellows lower flange ear 28c, bellows lower flange ear
29, the first lower limit hold-doun nut 29a, the second lower limit hold-doun nut 29b, the 3rd lower limit hold-doun nut
30, bellows lower flange 31, attachment hole 32, first lock nut
33, connect on the support 34a, second on the 3rd fastening nut 34, first and connect support
Connect on the 34b, the 3rd and connect support 35, the first piping flange dish on the support 34c, the 4th
36, seal ring 37, the first spring washer 37a, first spring washer
38, first connecting bolt 39, following connection support 40, the 6th fastening nut
41, the 4th lock nut 42, first fastening nut 43, first pipeline
44, second connecting bolt 45, the second spring washer 45a, second spring washer
46, second fastening nut 47, seal ring 48, the second piping flange dish
49, second pipeline 50, the 5th lock nut 51, the 9th spring washer
52, upper limit size 52a, upper limit size 52b, upper limit size
53, lower limit size 53a, lower limit size 53b, lower limit size
54, the tenth spring washer 55, the 6th lock nut 56, spacing standing screw
57, spacing hold-doun nut 58, elastomer connector upper flange plate 59, interior lock nut
60, attachment hole 61, flexible rubber joint 62, interior lock nut
63, elastomer connector lower flange 64, spacing hold-doun nut
Embodiment
Fig. 1 is that the master of steel spring rubber snubber looks cross-sectional schematic.The outer ring of helical steel springs 1 is enclosed with one deck rubber sleeve 12, its top and bottom are provided with the first and second two rubber columns 9,15, the top board 8 of rubber column top is with top board nut 7 and hang pull bar 19 firm welding, suspension pull bar 19 passes the bottom of first rubber column 9, center platen 10, helical steel springs 11, press table 14, second rubber column 15 and steel spring rubber snubber 13 and stretches out, by under connect support 39 and be connected with the second piping flange dish 48, and fastening by the 5th fastening nut 18, the 6th spring washer 17 and the 3rd lock nut 16.Cover plate 5 and cover plate nut 6 and fixing bolt 1 firm welding, make assembling finish after again with the tubular shell firm welding, make the first steel spring rubber snubber become an overall structure.Fixing bolt 1 is connected with the first piping flange dish 35 by last connection support 34, and fastening by the 4th fastening nut 2, the 5th spring washer 3 and second lock nut 4.
Fig. 3 is that the master before bellows is not installed looks schematic representation, after bellows 25 precompression by 4 (or more than 2) spacing standing screws 26,26a, 26b, 26c passes four upper flange ears 22 of bellows upper flange plate 24 and lower flange 30 respectively, 22a, 22b, 22c and four lower flange ears 28,28a, 28b, 28c also uses four upper limit hold-doun nuts 21 respectively, 21a, 21b, 21c and lower limit hold- doun nut 29,29a, 29b and last lock nut 23,23a, 23b, following lock nut 27,27a, 27b is locked, make bellows 25 be in its pre-compressed state, pre compressed magnitude is decided according to the hydrodynamic pressure that bears in the pipeline.
Fig. 5 is that the master that steel spring rubber snubber and bellows are installed in parallel looks schematic representation.Connect on first support 34 with under be connected support 39 respectively with the first piping flange dish 35 and bellows upper flange plate 24, the second piping flange dish 48 is connected with bellows lower flange 30, and by first connecting bolt 38, first spring washer 37,37a, first fastening nut 42 and second connecting bolt 44, second spring washer 45,45a, second fastening nut 46 is fastening, 13 of steel spring rubber snubbers are by first lock nut 32, the 3rd spring washer 3c, the 3rd fastening nut 33, the 4th spring washer 3b, 3a, the 4th fastening nut 2, the 5th spring washer 3, second lock nut 4 and the 3rd lock nut 16, the 6th spring washer 17, the 5th fastening nut 18, the 7th spring washer 17a, 17b, the 6th fastening nut 40, the 8th spring washer 17c, the 4th lock nut 41 with on be connected support 34 with under be connected that support 39 connects and fastening, finish the installation process of a steel spring rubber snubber, other steel spring snubbers 13a, 13b, the installation method of 13c is identical.A bellows should be installed (generally being 4) steel spring rubber snubber more than 2, keeping balance, second, third, connect support 34a on the 4th, 34b, 34c are connected in the first piping flange dish 35 and bellows upper flange plate 24 equally.
Fig. 6 is the adjusting method schematic representation of the spacing standing screw of bellows, the spacing standing screw of bellows need not be removed, increase the 9th spring washer 51, the 5th lock nut 50 are locked on the first upper limit hold-doun nut 21 of the first spacing standing screw 26, then lock nut 23 on first are unclamped the upper limit size 52 that is adjusted to apart from bellows upper flange plate 24 about 10mm; On first time lock nut 27, be locked again with spring washer and lock nut, unclamp the first lower limit hold-doun nut 29 then, be adjusted to apart from the lower limit size 53 of bellows lower flange 30 about 10mm, be locked with the tenth spring washer 54 and the 6th lock nut 55.Other three spacing standing screw 26a, 26b, the adjusting method of 26c is identical, upper limit size 52a, 52b and lower limit size 53a, 53b is about 10mm, and under the state of the normal operation of equipment, adjust the 4th fastening nut 2 of the suspension pull bar 19 of steel spring rubber snubber, second lock nut 4 and the 5th fastening nut 18, the 3rd lock nut 16 is to the identical size of upper limit size 52 and lower limit size 53, make bellows become soft connection, be used to simultaneously touch the end that steel spring rubber snubber hangs pull bar 19, should do not have obvious vibration and get final product.
Fig. 8 is that the master before flexible rubber joint is not installed looks cross-sectional schematic, pass flexible rubber joint upper flange plate 58 and lower flange 63 respectively by 4 (or more than 2) spacing standing screws 56 after flexible rubber joint 61 precompression, and be locked with spacing hold- doun nut 57,64 and interior lock nut 59,62 respectively, make flexible rubber joint 61 be in its pre-compressed state, pre compressed magnitude is decided according to the hydrodynamic pressure that bears in the pipeline.Attachment hole the 31, the 60th, the flexible rubber joint flange plate is connected usefulness with the piping flange dish.Seal ring 36,47 is that sealing is used between two flange plate.
Figure 10 is that the master that steel spring rubber snubber and flexible rubber joint are installed in parallel looks schematic representation, and its installation method is identical with the method that bellows is installed in parallel with steel spring rubber snubber.
The adjustment size of the spacing standing screw of flexible rubber joint and the method for adjustment are identical with the adjustment size and the adjusting method of bellows.
Method of the present invention can also be applied in similar need the elimination in the pipe-line system of low frequency vibration solid transferred noise.
Claims (4)
1, a kind of method of eliminating low frequency vibration solid transferred noise, it is characterized in that: in the vibration and noise reducing system of between mechanical vibration source and pipeline, contact bellows (25) or flexible rubber joint (61), at the upper and lower flange plate (58,63) of bellows (25) with the more upper and lower spacing size of 4 spacing standing screws (26,26a, 26b, 26c) (52,52a, 52b, 53,53a, 53b) being adjusted to 10mm after connecting support and respectively 4 steel spring rubber snubbers (13,13a, 13b, 13c) being installed in parallel.
2, a kind of method of eliminating low frequency vibration solid transferred noise according to claim 1, it is characterized in that: connect on first support (34) with under be connected support (39) respectively with the first piping flange dish (35) and bellows upper flange plate (24), the second piping flange dish (48) is connected with bellows lower flange (30), and by first connecting bolt (38), first spring washer (37,37a), first fastening nut (42) and second connecting bolt (44), second spring washer (45,45a), second fastening nut (46) is fastening, and steel spring rubber snubber (13) is then by first lock nut (32), the 3rd spring washer (3c), the 3rd fastening nut (33), the 4th spring washer (3b, 3a), the 4th fastening nut (2), the 5th spring washer (3), second lock nut (4) and the 3rd lock nut (16), the 6th spring washer (17), the 5th fastening nut (18), the 7th spring washer (17a, 17b), the 6th fastening nut (40), the 8th spring washer (17c), be connected on the 4th lock nut (41) and first support (34) with under be connected that support (39) connects and fastening.
3, a kind of method of eliminating low frequency vibration solid transferred noise according to claim 1, it is characterized in that: the spacing standing screw of bellows need not be removed, increase the 9th spring washer (51) on the first upper limit hold-doun nut (21) of the first spacing standing screw (26), the 5th lock nut (50) is locked, then lock nut (23) on first is unclamped the upper limit size (52) that is adjusted to apart from bellows upper flange plate (24) 10mm, on first time lock nut (27), be locked again with spring washer and lock nut, unclamping the first lower limit hold-doun nut (29) then is adjusted to apart from the lower limit size (53) of bellows lower flange (30) 10mm, be locked with the tenth spring washer (54) and the 6th lock nut (55), and, adjust the 4th fastening nut (2) of the suspension pull bar (19) of steel spring rubber snubber (13) at the normal state that moves of equipment, second lock nut (4) and the 5th fastening nut (18), the 3rd lock nut (16) is to upper limit size (52) and the identical size of lower limit size (53).
4, a kind of method of eliminating low frequency vibration solid transferred noise according to claim 1 is characterized in that: each bellows or flexible rubber joint are installed the steel spring rubber snubber (13) more than 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100276030A CN100491796C (en) | 2007-04-18 | 2007-04-18 | Method for removing low frequency vibration solid transferred noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100276030A CN100491796C (en) | 2007-04-18 | 2007-04-18 | Method for removing low frequency vibration solid transferred noise |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101126474A CN101126474A (en) | 2008-02-20 |
| CN100491796C true CN100491796C (en) | 2009-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100276030A Expired - Fee Related CN100491796C (en) | 2007-04-18 | 2007-04-18 | Method for removing low frequency vibration solid transferred noise |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839066B (en) * | 2010-06-11 | 2011-09-28 | 三一重工股份有限公司 | Tail end hose device, concrete pump vehicle and pipeline transporter |
| CN103043072B (en) * | 2012-12-21 | 2015-01-28 | 青岛四方车辆研究所有限公司 | Tension compression conversion type rubber buffer |
| US10359052B2 (en) * | 2014-01-24 | 2019-07-23 | Itt Manufacturing Enterprises, Llc | Vertical pump having discharge head with flexible element |
| CN104832727A (en) * | 2014-02-11 | 2015-08-12 | 上海中林给水材料有限公司 | Large-deflection steel pulling-off-prevention expansion joint |
| CN103883670B (en) * | 2014-03-31 | 2015-12-02 | 中铁十局集团建筑工程有限公司 | Roof ventilator ripple damping shock-proof device and method of construction thereof |
| CN106641094B (en) * | 2015-11-04 | 2018-11-13 | 株洲时代新材料科技股份有限公司 | A kind of fan stator dynamic vibration absorber and its installation method |
| CN105973994A (en) * | 2016-06-15 | 2016-09-28 | 河北大学 | Gas-liquid-phase-flow flow-type recognition device and method based on noise measurement |
| CN108679356A (en) * | 2018-06-27 | 2018-10-19 | 佛山科学技术学院 | A kind of vibration damping bellows |
| CN109442113B (en) * | 2018-12-26 | 2020-04-10 | 重庆维斯顿实业有限公司 | Pipe joint pre-pressing device |
| CN110285272B (en) * | 2019-06-13 | 2021-08-20 | 江苏科技大学 | Elastic composite vibration-damping joint for marine ventilating duct |
| CN110441163B (en) * | 2019-09-12 | 2022-05-24 | 吉林大学 | High-temperature ultrasonic fatigue in-situ test instrument and test method |
| CN111536198B (en) * | 2020-05-14 | 2022-05-24 | 北京工业大学 | Changeable two silica gel roof beams of rigidity inhale device that shakes |
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2007
- 2007-04-18 CN CNB2007100276030A patent/CN100491796C/en not_active Expired - Fee Related
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| CN101126474A (en) | 2008-02-20 |
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