CN202690540U

CN202690540U - Broadband silencer for fan

Info

Publication number: CN202690540U
Application number: CN 201220212713
Authority: CN
Inventors: 王洪强; 盖京方
Original assignee: SHANDONG LINFENG BLOWER CO Ltd
Current assignee: Shandong Facing Wind Science And Technology Co Ltd
Priority date: 2012-05-07
Filing date: 2012-05-07
Publication date: 2013-01-23
Anticipated expiration: 2022-05-07

Abstract

The utility model discloses a broadband silencer for a fan. The broadband silencer comprises an enclosure. An air inlet and an air outlet are formed at the two ends of the enclosure respectively. A tapered flow guide cylinder is arranged at each of the two ends of the enclosure. An inner container straight tube is arranged in the enclosure, and a tapered tube is arranged at each of the two ends of the inner container straight tube. The broadband silencer is characterized in that a solid silencing core is arranged in the inner container straight tube, and the two ends of the solid silencing core are tapered; each tapered flow guide cylinder has a sandwiched structure; a silencing orifice plate and extra-fine glass wool are arranged in each sandwich; and a silencing layer is arranged in the enclosure, and a noise isolation layer is arranged outside the enclosure. By the tapered flow guide cylinders with the sandwiches, airflow state is rational, and a noise reduction effect is greatly improved; the silencing layer is arranged in the enclosure, and the noise isolation layer is arranged outside the enclosure, so that the external radiation of noise in the silencer is greatly attenuation and isolated; and practice shows that more than 38dB(A) of static noise and more than 35dB(A) of dynamic noise can be directly reduced, air flow resistance loss is lower than 260Pa, and the broadband silencer is actually environment-friendly, efficient and energy-saving. The broadband silencer is low in manufacture cost and long in service life, and the noise of low frequency, intermediate frequency and high frequency can be eliminated.

Description

A kind of wideband fans silencer

Technical field the utility model belongs to the silencing equipment technical field, relates to the silencing apparatus of the supporting large noise elimination quantity of a kind of ventilator, especially relates to a kind of lower resistance broadband silencing apparatus, is specifically related to a kind of wideband fans silencer.

The background technique blower fan belongs to a kind of general machinery equipment, have the characteristics such as low cost of manufacture simple in structure, be widely used in the various fields such as chemical industry, metallurgy, papermaking and food, but owing to can produce larger noise when its work, aerodynamic noise particularly is to environment.And conventional blower fan noise reduction generally adopts general muffler, and its frequency of noise elimination and blower fan matching are bad, and soundproof effect is undesirable.For these problems, the technician passes through to change the modes such as silencing apparatus shape and size, but generally can only subdue 10-15dB (A), can't fundamentally realize larger noise reduction; Some engineer designs acoustic hood etc. and comes and matched with blower, effect substantially can, but manufacture cost is too high, fancy price so that the user be difficult to accept.

The summary of the invention the purpose of this utility model is the technical problem that the wideband noise of solution prior art blower fan Special-purpose silencer is subdued, and a kind of wideband fans silencer is provided.

To achieve these goals, the utility model wideband fans silencer comprises that two ends are provided with the casing of inlet, outlet, and the two ends of casing are respectively equipped with the conical flow guiding cylinder, is provided with the inner bag straight tube of two ends band cone cylinder in the described casing; Its main points are to be provided with the tapered solid noise elimination core courage in two ends in the described inner bag straight tube; Described conical flow guiding cylinder is sandwich structure, is provided with noise elimination orifice plate and super glass wool in the interlayer; Establish silencing plate in the described casing, peripheral hardware is every the layer of making an uproar.

Silencing plate in the described casing is made of glass fibre cloth, noise elimination slag wool and silencing plate orifice plate.

Consisted of by casing urceolus, air entrained concrete and puigging orifice plate every the layer of making an uproar outside described.

Described casing is provided with hanger.

The end of described conical flow guiding cylinder is provided with the sealing alveolus.

The utility model is owing to be provided with the conical flow guiding cylinder of sandwich, so that stream condition is more reasonable, noise reduction strengthens greatly; Establish silencing plate, peripheral hardware in the casing every the layer of making an uproar, so that the external radiation of the interior noise of silencing apparatus is farthest subdued and isolated, facts have proved the directly static 38dB (A) of noise reduction, dynamically more than the 35dB (A), the air-flow resistance is decreased less than 260Pa, really realizes environment-friendly high-efficiency energy-saving.The utility model low cost of manufacture, long service life, can eliminate the noise of low frequency, intermediate frequency and each frequency of high frequency.

Description of drawings Fig. 1 is the utility model structural representation;

Fig. 2 is the A section partial enlarged drawing among Fig. 1;

Fig. 3 is the B section partial enlarged drawing among Fig. 1.

Among the figure 1, suction port 2, conical flow guiding cylinder 3, noise elimination core courage 4, casing 5, silencing plate 6, every the layer 7 of making an uproar, inner bag straight tube 8, cone cylinder 9, air outlet 10, puigging orifice plate 11, air entrained concrete 12, silencing plate orifice plate 13, noise elimination slag wool 14, glass fibre cloth 15, casing urceolus 16, sealing alveolus 17, hanger 18, super glass wool 19, noise elimination orifice plate

Embodiment is with reference to Fig. 1, Fig. 2 and Fig. 3, and this use is novel to comprise that two ends are provided with inlet, outlet 1,9 casing 4, and the two ends of casing 4 are respectively equipped with conical flow guiding cylinder 2, are provided with the inner bag straight tube 7 of two ends band cone cylinder 8 in the described casing 4; Be provided with the tapered solid noise elimination core courage 3 in two ends in the described inner bag straight tube 7; Described conical flow guiding cylinder 2 is sandwich structure, is provided with noise elimination orifice plate 19 and super glass wool 18 in the interlayer; Establish silencing plate 5 in the described casing 4, peripheral hardware is every the layer 6 of making an uproar; Silencing plate in the described casing is made of glass fibre cloth 14, noise elimination slag wool 13 and silencing plate orifice plate 12; Consisted of by casing urceolus 15, air entrained concrete 11 and puigging orifice plate 10 every the layer of making an uproar outside described; Described casing 4 is provided with hanger 17; The end of described conical flow guiding cylinder 2 is provided with sealing alveolus 16.

Conical flow guiding cylinder 2 can link into an integrated entity with the flange that is arranged on the gas inlet, outlet, and the import or export of its shape and institute's gas-distributing fan is corresponding, can be square also can be circular, and by being arranged on the sealing gaskets sealing in the sealing alveolus 16.

The assembling of each parts of the utility model, design principle and effect: conical flow guiding cylinder 2 is to design according to the flow section method according to best flow area, the strong noise air-flow enters in the casing through guide shell, inner and core courage 3 contact-impacts are eliminated noise, the outside contacts with silencing plate 5, the collision resonance sound-absorbing is eliminated most high frequencies and mid-frequency noise, and the remainder low-frequency noise penetrates interior silencing plate 5 and enters outer every the layer 6 of making an uproar, be subjected to resonance sound-absorbing and the deadening of air entrained concrete, reach farthest and subdue.

Described conical flow guiding cylinder 2 is to carry out size design according to the air-flow distribution character, to reduce the air inlet and outlet end air whirl, the punching rate of nexine noise elimination orifice plate 19 is higher, fill super glass wool 18 in the chamber, be provided with glass fiber cloth between orifice plate and the glass wool, avoid glass wool 18 excessive from the hole of orifice plate 19 to increase soundproof effect, improved whole noise reduction.Casing 4, internal layer are designed to silencing plate orifice plate 12, and liner noise elimination slag wool 13 has designed glass fiber cloth between orifice plate 12 and the slag wool 13, and the interior silencing plate of this casing mainly resonates to pneumatic noise and absorbs, and particularly the high-frequency noises eradicating efficacy is obvious; Casing 4 is outer for every the layer 6 of making an uproar, and its internal sound insulation layer orifice plate 10 also is the urceolus of interior silencing plate, and punching rate is more lower slightly than noise elimination orifice plate 19, liner air entrained concrete 11, to the air-flow residual noise particularly Middle and low frequency noise realize more thorough must subduing and cut off.

Air entrained concrete 11 mainly is to add that with pulverized fuel ash the auxiliary material such as cement adopts aerating technique to make, and can fully utilize industrial residue, curbs environmental pollution, and the fan silencing apparatus brings desirable noise elimination noise reduction effect preferably again.

At casing 4 a rotary hanger 17 is set, pulls during lifting to axial position, be convenient to lift stressed, turn back at ordinary times radial position, press close to the casing end face, elegant in appearance.

The utility model has solved the infiltration of low-frequency noise and has subdued difficult problem, have simple in structure, operate steadily, characteristics that noise reduction efficacy is high, can directly eliminate more than the dynamic noise 35dB (A), really realize environmental protection and energy-efficient.

Claims

1. a wideband fans silencer comprises that two ends are provided with the casing of inlet, outlet, and the two ends of casing are respectively equipped with the conical flow guiding cylinder, is provided with the inner bag straight tube of two ends band cone cylinder in the described casing; It is characterized in that being provided with in the described inner bag straight tube the tapered solid noise elimination core courage in two ends; Described conical flow guiding cylinder is sandwich structure, is provided with noise elimination orifice plate and super glass wool in the interlayer; Establish silencing plate in the described casing, peripheral hardware is every the layer of making an uproar.

2. a kind of wideband fans silencer according to claim 1 is characterized in that described casing is provided with hanger.

3. a kind of wideband fans silencer according to claim 1 is characterized in that the end of described conical flow guiding cylinder is provided with the sealing alveolus.