CN103306793A

CN103306793A - Spiral-flow silencer

Info

Publication number: CN103306793A
Application number: CN2013102501490A
Authority: CN
Inventors: 张洪流; 夏鹏飞; 胡祝东; 陈刚
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2013-06-21
Filing date: 2013-06-21
Publication date: 2013-09-18

Abstract

The invention relates to a device for automobile exhaust emission, and aims at providing an exhaust silencer which is simple in structure, reduces exhaust noise and purifies exhaust. The spiral-flow silencer comprises a body, wherein a body inner cavity is formed at a hollow part in the body; a hinge column is arranged in a central position of the front end face of the body inner cavity, penetrates through the front end face of the body inner cavity vertically, and can rotate along a central axis of the hinge column; an impeller is mounted at the rear end of the hinge column; the side end faces of blades of the impeller are over against an air inlet pipe; the rear end of an air guide column is close to an air exhaust pipe; and an annular air exhaust channel is formed between the outer circumference surface of the air guide column and a wall of the body inner cavity. The spiral-flow silencer is based on principles of cyclone dust removal and impeller frequency breaking, and kinetic energy of the exhaust entering an air inlet is reduced by the impeller, so that the exhaust forms a spiral airflow, and is discharged from the air exhaust channel along the outer surface of the air guide column; the noise is reduced; and under the action of a centrifugal force, dust particles in the exhaust can be thrown on the wall of the body inner cavity outside the airflow, so that an exhaust purification effect is exerted.

Description

The rotary flow type baffler

Technical field

The present invention relates to a kind of gas emission device, particularly relate to a kind of gas emission device for reducing noise.

Background technique

Flow velocity was very large when the gas in the cylinder was discharged motor after the pushing piston acting, being pulsed advances and can produce very large noise, in order to reduce the tail gas noise, the tail gas of generally motor being discharged enters the tail gas baffler, existing tail gas muffler structure is complicated, not only increased manufacture cost, but also increased the tail gas holdup time therein, reduce exhaust emissions speed, the reducing noise effect is also undesirable, contain a large amount of dust granules in the tail gas simultaneously, being discharged to can contaminated air in the air.

Summary of the invention

The technical problem to be solved in the present invention provide a kind of simple in structure, effectively reduce the rotary flow type baffler of tail gas noise, dedusting.

Rotary flow type baffler of the present invention, comprise body, described body hollow, described body interior hollow space forms a chamber body, the air guide post is set in the described chamber body, described chamber body is communicated with suction tude near its front-end face place, described chamber body rear end is communicated with outlet pipe, described chamber body front-end face central position arranges hinge post, described hinge post vertically passes described chamber body front-end face and can rotate along described hinge post medial axis, impeller is installed in described hinge post rear end, described impeller has five wheel blades, described every wheel blade radian is 35 °, its side end face was over against the described suction tude mouth of pipe when described every wheel blade forwarded near the described suction tude, described impeller ear end face is over against described air guide post front end, and described air guide post rear end is formed with annular waste air duct near described outlet pipe between described air guide post outer peripheral surface and the described chamber body chamber wall.

The invention difference from existing technology is; utilized the broken frequency principle of cyclone dust removal and impeller; motor exhaust at a high speed enters when of the present invention; tail gas can blow vane rotary; tail gas also can rotate with impeller; thereby upset previous pulsed straight line motion; become along air guide post outer peripheral surface and in the exhaust passage, rotate backward; when conversion moving direction; reduced self kinetic energy, reduced amplitude, the noise of tail gas has more effectively reduced; particle larger in the tail gas can be thrown on the chamber body wall because of the centrifugal force that the spiral motion of tail gas produces, and has purified tail gas.

Rotary flow type baffler of the present invention, wherein said body and described chamber body are cylinder type, are communicated with by conical pipe between chamber body and the outlet pipe, and outlet pipe is arranged on conical pipe cone point, body and chamber body adopt cylinder, are because cylinder is conducive to the smooth and easy of exhaust emissions.Conical pipe is adopted in the body rear end, and being has a region of stability afterwards in order to make tail gas enter the chamber body rear end, makes air-flow further stable, and noise can be less.

Rotary flow type baffler of the present invention, described body are close to described chamber body front-end face center rigid bearing, and the hinge post front end is installed in the described bearing.

Rotary flow type baffler of the present invention, described air guide post are a hollow circuit cylinder cylinder, are connected with leg between described air guide post outer peripheral surface and the described chamber body, the air guide post is set can makes tail gas along the quickening of moving of air guide post outer peripheral surface, increase exhaust velocity.

Below in conjunction with accompanying drawing rotary flow type baffler of the present invention is described further.

Description of drawings

Fig. 1 is rotary flow type baffler axonometric drawing of the present invention;

Fig. 2 is rotary flow type baffler cut away view of the present invention.

Embodiment

Reach as shown in Figure 2 such as Fig. 1, rotary flow type baffler of the present invention comprises cylindrical body 1, body 1 hollow, body 1 inner hollow partly forms a cylindrical body inner chamber 2, the chamber body 2 interior air guide posts 8 that arrange, chamber body 2 is communicated with suction tude 3 near its front-end face place, chamber body 2 rear ends are communicated with outlet pipe 4 by conical pipe 10, chamber body 2 front-end face central positions arrange hinge post 5, hinge post 5 vertically passes chamber body 2 front-end faces and can rotate along hinge post 5 medial axis, body 1 next-door neighbour's chamber body 2 front-end face place rigid bearings 7, bearing 7 interior installation hinge post 5 front ends, impeller 6 is installed in hinge post 5 rear ends, impeller 6 has five wheel blades, every wheel blade radian is 35 °, its side end face was over against suction tude 3 mouths of pipe when every wheel blade forwarded near the suction tude 3, impeller 6 ear end faces are over against air guide post 8 front ends, air guide post 8 rear ends are near outlet pipe 4, air guide post 8 is a hollow cylinder shape, be formed with annular waste air duct 9 between air guide post 8 outer peripheral surfaces and the chamber body 2 chamber walls, be connected with leg 81 between air guide post 8 outer peripheral surfaces and the chamber body 2.

The present invention in use; suction tude 3 is communicated with motor and chamber body 2; tail gas enters in the chamber body 2 from motor; tail gas blows impeller 6 blades; blade impeller 6 rotations of impeller 6; tail gas also can rotate with impeller 6 and enter air guide post 8, thereby upsets previous straight pulse formula motion, becomes along air guide post 8 outer peripheral surfaces and moves behind 9 screws of exhaust passage; when conversion moving direction; reduced self kinetic energy, reduced amplitude, the noise of tail gas has more effectively reduced; afterwards; tail gas is discharged from outlet pipe 4, and particle larger in the tail gas can be thrown on chamber body 2 walls because of the centrifugal force that the spiral motion of tail gas produces, and has purified tail gas.

The present invention adopts safe bodyguard TES1358 sound level to take into account granule capturing device and respectively the noise reduction of original-pack diesel tractor baffler and rotary flow type baffler of the present invention and the discharge amount of tail gas smoke particle is measured take east wind TJ1002 model diesel tractor as noise source.The measurement time of each experiment is 10 minutes.Measured data is as shown in the table:

Table 1: the survey data of original-pack diesel tractor baffler

Table 2: rotary flow type baffler laboratory data of the present invention

Annotate: stipulate among the standard GB/T 4214.1-2000: " the difference of the sound pressure level of surveying and background noise level greater than more than the 15dB, needn't revise ".

By table 1, table 2 as can be known, the smoke particle capture rate in the tail gas of the present invention is compared with original-pack farm tractor baffler and is improved 80%～90%; Output noise than original-pack farm tractor baffler compare reduced 35%～40%.

Above-described embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that those of ordinary skills make technological scheme of the present invention all should fall in the definite protection domain of claims of the present invention.

Claims

1. rotary flow type baffler, comprise body (1), described body (1) hollow, described body (1) inner hollow partly forms a chamber body (2), air guide post (8) is set in the described chamber body (2), described chamber body (2) is communicated with suction tude (3) near its front-end face place, described chamber body (2) rear end is communicated with outlet pipe (4), it is characterized in that: described chamber body (2) front-end face central position arranges hinge post (5), described hinge post (5) vertically passes described chamber body (2) front-end face and can rotate along described hinge post (5) medial axis, impeller (6) is installed in described hinge post (5) rear end, described impeller (6) has five wheel blades, described every wheel blade radian is 35 °, its side end face was over against described suction tude (3) mouth of pipe when described every wheel blade forwarded near the described suction tude (3), described impeller (6) ear end face is over against described air guide post (8) front end, described air guide post (8) rear end is formed with annular waste air duct (9) near described outlet pipe (4) between described air guide post (8) outer peripheral surface and described chamber body (2) the chamber wall.

2. rotary flow type baffler according to claim 1, it is characterized in that: described body (1) and described chamber body (2) are cylinder type, be communicated with by conical pipe (10) between described chamber body (2) and the outlet pipe (4), described outlet pipe (4) is arranged on described conical pipe (10) cone point.

3. rotary flow type baffler according to claim 2, it is characterized in that: described body (1) is close to described chamber body (2) front-end face center rigid bearing (7), and hinge post (5) front end is installed in the described bearing (7).

4. rotary flow type baffler according to claim 3, it is characterized in that: described air guide post (8) is a hollow cylinder shape, is connected with leg (81) between described air guide post (8) outer peripheral surface and the described chamber body (2).