CN205225875U - Closed type silencer - Google Patents

Abstract

The utility model discloses a closed type silencer. Closed type silencer is including the pipe of eliminating the noise, anemostat, the fixed silencing member who manages, eliminates the noise lid, noise elimination cap and curled and formed by noise elimination sponge, silencing member's the curling number of turns of noise elimination sponge is greater than 1 ring, fixed pipe is located it is intraductal to eliminate the noise, the pipe of eliminating the noise is located in the anemostat, the pipe wall of managing of eliminating the noise has a plurality of through -holes. The pipe of eliminating the noise has at least a port to be connected with eliminate the noise and cover, one of them port of pipe of eliminating the noise is connected with the noise elimination cap, and the noise elimination cap is located the outside of eliminating the noise and covering, the noise elimination is covered has a plurality of soundproofing hole, soundproofing hole's size is by being close to one end to the other end of noise elimination pipe is crescent. Silencing member's quantity is a plurality of, silencing member is located it is intraductal to eliminate the noise, and adjacent silencing member's noise elimination sponge curling direction is opposite. The utility model relates to a closed type silencer, noise cancelling effect is good.

Description

Closed type silencing apparatus

Technical field

The utility model relates to noise elimination field, particularly relates to a kind of closed type silencing apparatus.

Background technique

In some manufacturing shops, the use of equipment usually can send very large noise, as in current sewing device, in order to can better position cut-parts, needs to adopt a large amount of air intake devices to carry out air draught location to cut-parts.Air intake device, in running, usually can produce larger noise at exhaust outlet and air sucking mouth, can have a strong impact on the working environment of workman, bring negative impact to work task efficiency and mood.

Model utility content

Based on this, be necessary to provide a kind of closed type silencing apparatus that can reduce noise.

A kind of closed type silencing apparatus, comprise hush tube, diffusing tube, fixed tube, noise elimination lid, noise elimination cap and by the curling damper element of noise elimination cotton, the curling number of turns of noise elimination cotton of described damper element is greater than 1 circle, described hush tube is positioned at described fixed tube, described fixed tube is positioned at described diffusing tube, and the tube wall of described hush tube has multiple through hole;

Described hush tube has at least Single port to be connected with described noise elimination lid, described hush tube wherein Single port is connected with described noise elimination cap, and described noise elimination cap is positioned at the outside of described lid of eliminating the noise, described noise elimination covers has multiple sound attenuation hole, and the size of described sound attenuation hole is increased to the other end gradually by the one end near described hush tube;

The quantity of described damper element is multiple, and described damper element is positioned at described hush tube, and the noise elimination cotton curl direction of adjacent damper element is contrary.

Wherein in an embodiment, described sound attenuation hole is distributed in described noise elimination lid.

Wherein in an embodiment, described hush tube, described diffusing tube and described fixed tube are all cylindrically.

Wherein in an embodiment, the outer wall of described hush tube coordinates with the contact internal walls of described fixed tube.

Wherein in an embodiment, the inwall of described diffusing tube coordinates with the wall contacts of described fixed tube.

The closed type silencing apparatus that the utility model relates to, fixed tube is positioned at diffusing tube, and hush tube is positioned at fixed tube, diffusing tube and hush tube are for eliminating the noise and the diffusion of sound, the tube wall of hush tube has multiple through hole, and through hole is also convenient to the dispersion of sound, to reduce the decibel of sound.Noise elimination cap, lid of eliminating the noise are linked in sequence in the Single port of hush tube successively, and eliminating the noise to cover has multiple sound attenuation hole, and the size of sound attenuation hole increases gradually by near a side of hush tube to a relative side; Gradually expansion type sound attenuation hole speed u reduces, and internal diameter d increases, and causes overall RE to reduce, decreases turbulent flow.Speed reduces the reduction that also can cause exporting border pressure difference, decreases noise at the boundary.From noise profile, gradually expansion type can be low than the outlet noise of straight-tube.The quantity of damper element is multiple, and damper element is positioned at hush tube, and the curl direction of the noise elimination cotton of adjacent damper element is contrary.The contrary damper element of multiple rotation direction is added in the inside of hush tube, by the layout of damper element, and the setting that the rotation direction of adjacent damper element is contrary, the decibel of the interior noise of hush tube can effectively be reduced.

Accompanying drawing explanation

Fig. 1 is the utility model one embodiment closed type silencing apparatus schematic diagram;

Fig. 2 is the schematic diagram of the noise elimination lid of the silencing apparatus of closed type shown in Fig. 1.

Description of reference numerals

10, closed type silencing apparatus; 100, hush tube; 200, fixed tube; 300, diffusing tube; 400a, 400b, 400c, damper element; 500, noise elimination lid; 510, sound attenuation hole; 520, fixed hole; 600, noise elimination cap; 610, opening; 700, fixed block; 710a, 710b, fixing rod.

Embodiment

For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.

It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.

Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in specification of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Term as used herein "and/or" comprises arbitrary and all combinations of one or more relevant Listed Items.

Shown in Figure 1, present embodiment discloses a kind of closed type silencing apparatus 10.This closed type silencing apparatus 10 comprises hush tube 100, diffusing tube 300, fixed tube 200, noise elimination lid 500, noise elimination cap 600, fixed block 700 and by curling damper element 400a, 400b, the 400c of noise elimination cotton.The curling number of turns of noise elimination cotton is greater than 1 circle, as 1.2 circles, 1.5 circles, 2 circles, 3 circles etc.Described hush tube 100, described diffusing tube 300 and described fixed tube 200 are all cylindrically.

Shown in Figure 1, described fixed tube 200 is positioned at described diffusing tube 300, and the inwall of described diffusing tube 300 coordinates with the wall contacts of described fixed tube 200.Described hush tube 100 is positioned at described fixed tube 200.The outer wall of described hush tube 100 coordinates with the contact internal walls of described fixed tube 200.The tube wall of described hush tube 100 has multiple through hole.Through hole is also convenient to the dispersion of sound, to reduce the decibel of sound.

Shown in Figure 1, described noise elimination lid 500, described noise elimination cap 600 are linked in sequence in the wherein Single port of described hush tube 100 successively, and the another port of described hush tube 100 is also connected with described noise elimination lid 500.

In the present embodiment, at least one port of hush tube 100 is connected with a noise elimination lid 500, hush tube 100 wherein Single port is connected with noise elimination cap 600, when hush tube 100 is connected with a noise elimination lid 500, noise elimination cap 600 is connected to one end that hush tube 100 has noise elimination lid 500, and noise elimination cap 600 is positioned at the outside of noise elimination lid 500.When hush tube 100 is connected with two noise elimination lids 500, noise elimination cap 600 is connected to hush tube 100 wherein one end, and cap 600 of eliminating the noise is positioned at the outside of noise elimination lid 500.

Shown in Figure 2, described noise elimination lid 500 has multiple sound attenuation hole 510.The size of described sound attenuation hole 510 increases, in gradually expansion type gradually by near one end of described hush tube 100 to relative one end.Described sound attenuation hole 510 is distributed on described noise elimination lid 500.Gradually expansion type sound attenuation hole 510 speed u reduces, and internal diameter d increases, and causes overall RE to reduce, decreases turbulent flow.Speed reduces the reduction that also can cause exporting border pressure difference, decreases noise at the boundary.From noise profile, gradually expansion type can be low than the outlet noise of straight-tube.Fixed block 700 is connected to hush tube 100; Fixing hush tube 100 is may be used in multiple desired position by the setting of fixed block 700, easy to use.

The quantity of described damper element 400a, 400b, 400c is three, is understood that, the quantity of damper element 400a, 400b, 400c also can be two, four, five etc.Described damper element 400a, 400b, 400c are positioned at described hush tube 100, and the placement of adjacent damper element 400a, 400b, 400c order is contrary, makes the curl direction of the noise elimination cotton of adjacent damper element (400a and 400b, 400b and 400c) contrary.Damper element 400a, 400b, 400c that multiple rotation direction is contrary is added in the inside of hush tube 100, by the layout of damper element 400a, 400b, 400c, and the setting that the rotation direction of adjacent damper element (400a and 400b, 400b and 400c) is contrary, the decibel of the interior noise of hush tube 100 can effectively be reduced.

Shown in Figure 1, described fixed block 700 has fixing rod 710a, 710b, and the quantity of described fixing rod is two in the present embodiment.Described noise elimination lid 500 has fixed hole 520, the quantity of described fixed hole 520 is two simultaneously.Be understood that, the quantity of fixing rod and fixed hole is corresponding, and the quantity of fixing rod and fixed hole is all not limited to two, also can be one, three, four etc.

Shown in Figure 1, described fixing rod 710a wears the fixed hole 520 on fixed hole 520, described hush tube 100 and another noise elimination lid 500 on one of them noise elimination lid 500 successively; Described fixing rod 710b wears the fixed hole 520 on fixed hole 520, described hush tube 100 and another noise elimination lid 500 on one of them noise elimination lid 500 successively.And described fixing rod 710a, 710b are connected with described noise elimination lid 500, be also namely indirectly connected with described hush tube 100.Described fixing rod 710a, 710b and described fixed hole 520 one_to_one corresponding.

The closed type silencing apparatus 10 that the utility model relates to, comprises hush tube 100, diffusing tube 300, fixed tube 200, noise elimination lid 500, noise elimination cap 600, fixed block 700 and damper element 400a, 400b, 400c by the curling multilayer of noise elimination cotton.Fixed tube 200 is positioned at diffusing tube 300, and hush tube 100 is positioned at fixed tube 200, and diffusing tube 300 and hush tube 100 are for eliminating the noise and the diffusion of sound, and the tube wall of hush tube 100 has multiple through hole, and through hole is convenient to the dispersion of sound, to reduce the decibel of sound.

The closed type silencing apparatus 10 that the utility model relates to, noise elimination lid 500, noise elimination cap 600 are linked in sequence successively in the wherein Single port of hush tube 100.Further, the other end port of hush tube 100 is also connected with described noise elimination lid 500.Noise elimination cap 600 has opening 610, the setting of this opening 610 is also beneficial to the diffusion of sound.Noise elimination lid 500 has multiple sound attenuation hole 510, the size of sound attenuation hole 510 increases gradually by near a side of hush tube 100 to a relative side.The ratio of the size of the two-port of sound attenuation hole 510 is 1:7, and the area of the also i.e. perforate at the two ends of sound attenuation hole 510 is 1:7.Aerodynamic noise mainly divides two-part, and a part is the noise that the instantaneous variation of outlet border air pressure produces, and another part is the noise that internal pipeline turbulent flow produces.Want to reduce aerodynamic noise approach mainly through reducing border transition pressure difference, the turbulence noise of less pipe interior.For cylindrical conduit, reynolds' number RE=u*d/ μ=48000 > 2300, so there is a large amount of turbulent flows in inside, produces noise.Gradually expansion type sound attenuation hole 510 speed u reduces, and internal diameter d increases, and causes overall RE to reduce, decreases turbulent flow.Speed reduces the reduction that also can cause exporting border pressure difference, decreases noise at the boundary.From noise profile, gradually expansion type can be lower than the outlet noise of straight-tube, and the expansion angle of different proportion is all very large to influence of noise, and comparatively stable from simulation result 1:7 exit flow, turbulent flow is less, and corresponding noise also can be less.Flaring mouth for different proportion also has different, and degree of expansion is crossed conference and caused generation local turbulent and pressure reduction to change excessive local boundary noise, so there is the degree of expansion of a noise the best, the degree of expansion noise of the 1:7 obtained by simulation calculation is lower.

The closed type silencing apparatus 10 that the utility model relates to, time on the air intake device in sewing field or blowing device, reduces noise 9.6dB than (81.6dB) when not filling closed type silencing apparatus 10.Than former closed type silencing apparatus 10 noise reduction 6.6dB.The closed type silencing apparatus 10 that the utility model relates to, noise reduction is obvious.

Each technical characteristics of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristics in above-described embodiment is not all described, but, as long as the combination of these technical characteristicss does not exist contradiction, be all considered to be the scope that this specification is recorded.

The above embodiment only have expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims (5)

1. a closed type silencing apparatus, it is characterized in that, comprise hush tube, diffusing tube, fixed tube, noise elimination lid, noise elimination cap and by the curling damper element of noise elimination cotton, the curling number of turns of noise elimination cotton of described damper element is greater than 1 circle, described hush tube is positioned at described fixed tube, described fixed tube is positioned at described diffusing tube, and the tube wall of described hush tube has multiple through hole;

Described hush tube has at least Single port to be connected with described noise elimination lid, described hush tube wherein Single port is connected with described noise elimination cap, and described noise elimination cap is positioned at the outside of described lid of eliminating the noise, described noise elimination covers has multiple sound attenuation hole, and the size of described sound attenuation hole is increased to the other end gradually by the one end near described hush tube;

The quantity of described damper element is multiple, and described damper element is positioned at described hush tube, and the noise elimination cotton curl direction of adjacent damper element is contrary.

2. closed type silencing apparatus according to claim 1, is characterized in that, described sound attenuation hole is distributed in described noise elimination lid.

3. closed type silencing apparatus according to claim 1 and 2, is characterized in that, described hush tube, described diffusing tube and described fixed tube are all cylindrically.

4. closed type silencing apparatus according to claim 3, is characterized in that, the outer wall of described hush tube coordinates with the contact internal walls of described fixed tube.

5. closed type silencing apparatus according to claim 3, is characterized in that, the inwall of described diffusing tube coordinates with the wall contacts of described fixed tube.