CN202768126U

CN202768126U - Exhaust funnel with silencing function

Info

Publication number: CN202768126U
Application number: CN 201220424122
Authority: CN
Inventors: 贾建有
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-25
Filing date: 2012-08-25
Publication date: 2013-03-06
Anticipated expiration: 2022-08-25

Abstract

The utility model provides an exhaust funnel with a silencing function, and belongs to the technical filed of tractor exhausting and silencing. The exhaust funnel with the silencing function comprises an exhaust funnel with simple structure and good silencing function. A silencing device is fixedly arranged at the upper portion of an exhaust pipe. A cylindrical inner portion of the silencing device is sequentially separated into an upper bin, a resonance bin, a middle bin, a lower middle bin and a lower bin from top to bottom by an upper plate, an upper middle plate, a middle plate, a lower middle plate and a lower plate. An exhaust port of the exhaust pipe is inserted into the inner portion of the exhaust pipe from the lower portion of the silencing device and communicated with the middle bin. An air-pass funnel with openings at two ends is arranged inside the silencing device and communicated with the upper bin and the lower bin. A plurality of small holes are arranged in the upper middle plate, the exhaust pipe, and a pipe wall of the air-pass funnel inside the lower middle bin. Big holes are arranged in the middle plate and the lower plate. Two separation plates with a plurality of small holes are arranged in the lower portion of the upper bin. An air outlet is arranged in a funnel wall of the upper bin. The exhaust pipe with the silencing function is used for the tractor exhaust funnel silencing.

Description

A kind of exhaust pipe that noise elimination function is arranged

Technical field

A kind of exhaust pipe that noise elimination function is arranged of the utility model belongs to tractor exhaust noise silencing technical field.

Background technique

People does something consumption under too large noise muscle power is much bigger when not having noise, and noise is also influential to the accuracy of work.Noise makes the people worried, disagreeable, and offending direct stimulation effect is arranged, and can cause and have a fiery temperament, and is oversensitive and tired.Work several hours every day under strong noise, after some months gets off, will produce injurious effects to people's the sense of hearing.Tractor all can produce big and small noise in the process of work, the intensity of sound that the operator on the tractor stands is very large.And the tractor noise is to make the people feel one of unhappy noise most in the farm machinery.Under the effect of this noise, driver's the sense of hearing is reduced and nonvolatil hearing loss has potential danger, the somebody can lose the sense of hearing forever, and this is not hard to imagine.The long-term continuous action of noise also can reduce people's digestion function of stomach and intestine, takes sb's mind off sth, and becomes the reason of tired and accident.In a survey report of Britain, mention, check and find have 36 people's the sense of hearing to sustain damage behind 70 operator on the tractors.In order to guarantee operator on the tractor's body and mind safety, we are necessary tractor is taked the noise reduction measure.

The model utility content

The utility model overcomes the deficiency that prior art exists, technical problem to be solved provided a kind of simple in structure, the preferably exhaust pipe of noise elimination function arranged.

For solving the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of exhaust pipe that noise elimination function is arranged, comprise exhaust duct and silencer, and silencer is fixedly mounted on exhaust duct top;

Silencer is divided into upper storehouse, resonance storehouse, Zhong Cang, Zhong Xiacang and Xia Cang with upper plate, the first upper plate, middle plate, lower plate from top to bottom successively for the tubular inside of sealing, the relief opening of exhaust duct from silencer below extend into its inner and run through lower plate, plate be communicated with middle storehouse, silencer inside was equipped with inflator, described excessively inflator is the cylinder of both ends open, crosses inflator and runs through upper plate, the first upper plate, middle plate and lower plate connection Shang Cang and Xia Cang;

Have a plurality of the first apertures on the described first upper plate, have the first macropore on the described middle plate, have the second macropore on the lower plate, under being arranged in, described exhaust duct has a plurality of second orifices on the tube wall of inside, storehouse, cross on the tube wall that inflator is arranged in lower inside, storehouse and have a plurality of the 3rd apertures, inside, described upper storehouse is equipped with two dividing plates, all has a plurality of the 4th apertures on described two dividing plates;

The barrel in upper storehouse is provided with the air outlet.

The described first upper plate can be replaced with the second upper plate that the centre have a third-largest hole, described the third-largest hole be positioned at the exhaust duct relief opening directly over.

The resonance storehouse is stretched on the top of described exhaust duct from the third-largest hole of the second upper plate, described exhaust duct is arranged on the tube wall of inside, storehouse and has a plurality of the 7th apertures.

Evenly have a plurality of the 6th apertures on the described second upper plate.

Have a plurality of the 5th apertures on the described lower plate.

Described silencer is cylindric, or is the square tube shape, or is prismatic tubular, or is oval tubular.

The beneficial effect that the utility model compared with prior art has is: the principle that the utility model utilizes micropore jet, porous diffusion and expansion chamber to eliminate the noise, make air-flow in silencer, pass through a plurality of apertures, flow through and reach good erasure effect behind a plurality of not isometric bins, and small volume, simple in structure.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the utility model embodiment one structural representation.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the A-A sectional view among Fig. 1.

Fig. 4 is the B-B sectional view among Fig. 1.

Fig. 5 is the utility model embodiment two structural representation.

Fig. 6 is the structural representation of replacing the second upper plate of the first upper plate in the utility model.

Among the figure: 1 is exhaust duct, and 2 is silencer, and 3 is upper plate, and 4 is the first upper plate, and 5 is middle plate, 6 is lower plate, and 7 is upper storehouse, and 8 are the resonance storehouse, and 9 be middle storehouse, 10 be in time storehouse, 11 is lower storehouse, and 12 was inflator, and 13 is dividing plate, and 14 is the air outlet, and 15 is the second upper plate.

Embodiment

Shown in Fig. 1-6, a kind of exhaust pipe that noise elimination function is arranged of the utility model comprises exhaust duct 1 and silencer 2, and silencer 2 is fixedly mounted on exhaust duct 1 top;

Silencer 2 for the tubular inside of sealing from top to bottom with upper plate 3, the first upper plate 4, middle plate 5, lower plate 6 be divided into successively upper storehouse 7, resonance storehouse 8, middle storehouse 9, in lower storehouse 10 and lower storehouse 11, the relief opening of exhaust duct 1 from silencer 2 belows extend into its inner and run through lower plate 6, plate 5 be communicated with middle storehouse 9, silencer 2 inside were equipped with inflator 12, described excessively inflator 12 is the cylinder of both ends open, crosses inflator 12 and runs through upper plate 3, the first upper plate 4, middle plate 5 and the lower plate upper storehouse 7 of 6 connections and lower storehouse 11;

Have a plurality of the first apertures on the described first upper plate 4, have the first macropore on the described middle plate 5, have the second macropore on the lower plate 6, under being arranged in, described exhaust duct 1 has a plurality of second orifices on the tube wall of 10 inside, storehouse, cross on the tube wall that inflator 12 is arranged in lower 10 inside, storehouse and have a plurality of the 3rd apertures, 7 inside, described upper storehouse are equipped with two dividing plates 13, all have a plurality of the 4th apertures on described two dividing plates 13;

The barrel in upper storehouse 7 is provided with air outlet 14.

The described first upper plate 4 can be replaced with the second upper plate 15 that the centre have a third-largest hole, described the third-largest hole be positioned at exhaust duct 1 relief opening directly over.

Resonance storehouse 8 is stretched on the top of described exhaust duct 1 from the third-largest hole of the second upper plate 15, described exhaust duct 1 is arranged on the tube wall of 9 inside, storehouse and has a plurality of the 7th apertures.

Evenly have a plurality of the 6th apertures on the described second upper plate 15.

Have a plurality of the 5th apertures on the described lower plate 6.

Described silencer 2 is cylindric, or is the square tube shape, or is prismatic tubular, or is oval tubular.

The similar piston of air in the tube wall aperture has certain acoustical mass, the similar pneumatic spring of closed cavity, has certain elasticity, when sound wave passes to accent, under the effect of sound wave, air column produces vibration, during vibration and the friction of accent wall make a part of acoustic energy be converted into heat energy and dissipate; The simultaneously sudden change owing to acoustic impedance makes Sonic wave sending reflection and interference phenomenon, causes sound energy attenuation; When system natural frequency and frequency of sound wave generation resonance, the acoustic energy of consumption is maximum, and the disappearance amount is maximum.

Micropore jet: the noise energy of spout radiation will be shifted to high frequency along with diminishing of nozzle diameter.Little nozzle diameter is to a certain extent little, and jet noise will move to the insensitive scope of people's ear.

The porous diffusion: after air-flow passed through Multiple-Aperture Device, flow velocity was diffused and weakens, the intensity of corresponding minimizing radiated noise.

Expansion chamber is eliminated the noise: sound wave causes passage in acoustic impedance to suddenly change in the unexpected expansion (or contraction) of pipeline section, and the Acoustic Wave Propagation direction is changed, and reflects in pipeline, the phenomenon such as interference, thereby reaches the noise elimination purpose.

Embodiment one

As shown in Figure 1, air-flow is storehouse 9 from the relief opening of exhaust duct 1 enters, and the flow area expansion is carried out expansion chamber to air-flow and eliminated the noise, simultaneously air-flow also the second orifice from the exhaust duct 1 enter in the Zhong Xiacang 10, utilize the principle of porous diffusion and micropore jet to carry out noise reduction;

Air-flow in the middle storehouse 9 again a plurality of the first apertures from the first upper plate 4 enters the resonance storehouse 8 of closed upper part, system natural frequency and frequency of sound wave are resonated, sound energy consumption reduces noise, and air-flow is got back in the middle storehouse 9 by a plurality of the first apertures on the first upper plate 4 again afterwards;

Air-flow in the middle storehouse 9 enters in the Zhong Xiacang 10 by the first macropore on the middle plate 5, in air-flows in the lower storehouse 10 entered inflator 12 through lower storehouse 11 by the second largest orifice flow on the lower plate 6 again, perhaps directly a plurality of the 3rd apertures on crossing inflator 12 entered the inflator 12;

Last air-flow enters in the storehouse 7, and by 14 outflows from the air outlet after a plurality of the 4th aperture noise reductions on two dividing plates 13.

Embodiment two

As shown in Figure 5, air-flow enters resonance storehouse 8 from the relief opening of exhaust duct 1, system natural frequency and frequency of sound wave are resonated, sound energy consumption, reduce noise, air-flow is got back to again in the exhaust duct 1 and by the second orifice on exhaust duct 1 sidewall and the 7th aperture and is entered in Zhong Xiacang 10 and the middle storehouse 9 afterwards, utilizes the principle of porous diffusion and micropore jet to carry out noise reduction;

Middle storehouse 9 and in air-flows in the lower storehouse 10 entered inflator 12 through lower storehouse 11 by the first macropore on the middle plate 5 and the second largest orifice flow on the lower plate 6 again, perhaps directly a plurality of the 3rd apertures on crossing inflator 12 entered the inflator 12;

Last air-flow enters in the storehouse 7, and by 14 outflows from the air outlet after a plurality of the 4th aperture noise reductions on two dividing plates 13;

Pipeline section constantly changes in the air current flow process, makes air-flow constantly carry out the expansion chamber noise reduction.

The above has done detailed description to embodiment of the present utility model by reference to the accompanying drawings, but the utility model is not limited to above-described embodiment, in the ken that those of ordinary skills possess, can also under the prerequisite that does not break away from the utility model aim, make various variations.

Claims

1. the exhaust pipe that noise elimination function is arranged comprises exhaust duct (1) and silencer (2), it is characterized in that: silencer (2) is fixedly mounted on exhaust duct (1) top;

Silencer (2) for the sealing tubular inside from top to bottom with upper plate (3), the first upper plate (4), middle plate (5), lower plate (6) is divided into upper storehouse (7) successively, resonance storehouse (8), middle storehouse (9), in lower storehouse (10) He Xiacang (11), the relief opening of exhaust duct (1) extend into its inside and runs through lower plate (6) from silencer (2) below, middle plate (5) is communicated with middle storehouse (9), silencer (2) inside was equipped with inflator (12), described excessively inflator (12) is the cylinder of both ends open, crosses inflator (12) and runs through upper plate (3), the first upper plate (4), storehouse (7) He Xiacang (11) in middle plate (5) and lower plate (6) connection;

Have a plurality of the first apertures on the described first upper plate (4), have the first macropore on the described middle plate (5), lower plate has the second macropore on (6), described exhaust duct (1) is positioned on the inner tube wall of Zhong Xiacang (10) and has a plurality of second orifices, crossing inflator (12) is positioned on the inner tube wall of Zhong Xiacang (10) and has a plurality of the 3rd apertures, inside, described upper storehouse (7) is equipped with two dividing plates (13), all has a plurality of the 4th apertures on described two dividing plates (13);

The barrel in upper storehouse (7) is provided with air outlet (14).

2. a kind of exhaust pipe that noise elimination function is arranged according to claim 1, it is characterized in that: the available centre of the described first upper plate (4) has the second upper plate (15) in the third-largest hole and replaces, described the third-largest hole be positioned at exhaust duct (1) relief opening directly over.

3. a kind of exhaust pipe that noise elimination function is arranged according to claim 2, it is characterized in that: resonance storehouse (8) is stretched on the top of described exhaust duct (1) from the third-largest hole of the second upper plate (15), and described exhaust duct (1) is arranged on the inner tube wall in storehouse (9) and has a plurality of the 7th apertures.

4. a kind of exhaust pipe that noise elimination function is arranged according to claim 2 is characterized in that: evenly have a plurality of the 6th apertures on the described second upper plate (15).

5. the described a kind of exhaust pipe that noise elimination function is arranged of any one is characterized in that: have a plurality of the 5th apertures on the described lower plate (6) according to claim 1-4.

6. the described a kind of exhaust pipe that noise elimination function is arranged of any one according to claim 1-4 is characterized in that: described silencer (2) is for cylindric, or is the square tube shape, or is prismatic tubular, or is oval tubular.