CN2665365Y

CN2665365Y - Silencer

Info

Publication number: CN2665365Y
Application number: CN 200320113615
Authority: CN
Inventors: 陈勇兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-19
Filing date: 2003-12-19
Publication date: 2004-12-22
Anticipated expiration: 2013-12-19

Abstract

Disclosed is a muffler device, particularly a kinetic energy muffler device used for internal combustion engines to initiatively eliminate the exhaust pulse, so that the exhaust gas exhausted from the muffler can eliminate the noise in uniform speed. An exhaust pipe and an exhaust tail pipe are fixedly connected on the outer shell of the muffler device; a snail shell fixedly connected with a vane is arranged in the outer shell of the muffler device; a muffler slot formed by a gas lead cone and the snail shell is fixedly connected in the snail shell; when the exhaust pipe that extends into the opening of snail shell exhausts, the gas lead cone in the snail shell will lead the exhaust gas and the sound wave into the muffler slot, and the air in the muffler slot will be extruded towards the center, so that the airflow and the sound wave that are of same size but opposite direction will balance out each other so as to effectively eliminate the impact energy in gas exhaust; moreover, the exhaust gas in the muffler slot can not be directly exhausted, therefore, the stored exhaust gas forms a high pressure air cushion in the muffler slot, and the exhaust gas will uniformly flow out in reverse direction through the cushioning of the air cushion. A reflector inside the outer shell of the muffler device is fixedly connected before the opening of the snail shell to reflect the sound wave back to the snail shell for elimination.

Description

A kind of silencing apparatus

Affiliated technical field

The utility model relates to a kind of silencer, is particularly useful for the silencing apparatus of internal-combustion engine.

Background technique

Prior art is normally formed with dissipative muffler and reactive muffler and is mixed silencing apparatus, to reach comparatively desirable noise elimination effect.But manufacture and design complexity, bulky, different motors will mate with different silencing apparatuss, has increased cost.

Summary of the invention

In order to overcome acoustic wave filter structure complexity in the prior art, the deficiency that weight is big, the purpose of this utility model is to adopt new technology, pulse characteristics when utilizing exhaust provides a kind of kinetic energy silencing apparatus of main elimination exhaust pulses, makes the exhaust gas velocity of discharging silencing apparatus even, eliminate its noise, and simple in structure, in light weight, cost is low.

The technological scheme that the prior art problem that solves the utility model is adopted is: be connected with outlet pipe and tailpipe on muffler shell, the affixed spiral case of fin is arranged in the muffler shell, be connected with air guide awl and spiral case in the spiral case and form anechoic trap, outlet pipe stretches in the opening of spiral case.

The beneficial effects of the utility model are: the vibration-absorbing and silencing scheme with a kind of active replaces existing passive resonant silencing scheme, and volume is little, and is simple and reliable for structure, in light weight, stable and reliable for performance, and cost is low.

Description of drawings

Further specify below in conjunction with drawings and Examples:

Accompanying drawing 1 is the 1st an example structure schematic representation of silencing apparatus.

Accompanying drawing 2 is the 2nd example structure schematic representation of silencing apparatus.

Accompanying drawing 3 is the 3rd example structure schematic representation of silencing apparatus.

Accompanying drawing 4 is the 4th example structure schematic representation of silencing apparatus.

Accompanying drawing 5 is the 5th example structure schematic representation of silencing apparatus.

Accompanying drawing 6 is the 6th example structure schematic representation of silencing apparatus.

Accompanying drawing 7 is the 7th example structure schematic representation of silencing apparatus.

Accompanying drawing 8 is the 8th example structure schematic representation of silencing apparatus.

Accompanying drawing 9 is that this noise elimination scheme is used for embodiment's sectional drawing that environment is eliminated the noise.

In the accompanying drawing 1, outlet pipe; 2, spiral case; 3, tap hole; 4, axle; 5, spring; 6, rubber; 7, spring; 8, the air guide awl; 9, anechoic trap; 10, microwell plate; 11, muffler shell; 12, tailpipe; 13, dividing plate; 14, porous ceramics; 15, fin; 16, reflector; 17, the vibration damping layer; 18, anechoic chamber; 19 bodies.

Embodiment

Embodiment is more in this programme, but much in common is arranged, and therefore carries out general description with one section independent literal, and segmentation further specifies its characteristics then.As Fig. 1 to a plurality of silencing apparatus embodiments shown in Figure 7, outlet pipe 1 is fixed on the muffler shell 11, and reach in the opening of spiral case 2 of 11 li of muffler shells, the air guide awl 8 usefulness fins 15 in spiral case 2 and the spiral case 2 are fixed on the muffler shell 11 or/and on the outlet pipe 1.When the waste gas of motor discharge is gone out outlet pipe 1 with high speed, as the blast shock wave and high-voltage high-speed gas under the constraint of spiral case 2 with inertia before so that do not expand, 8 this moments of air guide in spiral case 2 awl waste gas and pressure wave are divided into the equal-sized of symmetry and are directed to compression and collision mutually in the anechoic trap 9 of back, because air has the favorable damping performance, its energy is eliminated in compression and collision, and the air in the anechoic trap 9 can not directly be discharged, therefore gathered and formed the high pressure air cushion, the waste gas of discharging is oppositely discharged spiral case 2 through high pressure air cushion buffering back subsequently, air pressure reduces up to next motor combustion gas thereupon, discharges from tailpipe 12 through the waste gas of vibration-absorbing and silencing.In this process, the long more volume of spiral case 2 is big more, and its acoustic attenuation performance is just good more, or anechoic trap 9 is many more, and the energy that single anechoic trap is 9 li is just few more, and its acoustic attenuation performance is just good more.Change the relative area between air guide awl 8 and the outlet pipe 1, just can satisfy the motor needs of close discharge capacity with same silencing apparatus.Anechoic chamber 18 in this programme on outlet pipe 1 and the air guide awl 8, the vibration damping layer 17 that spiral case is 2 li, the multi-cavity resonance exhaust silencer of forming by microwell plate 10 and dividing plate 13, the rubber damping 6 at fin 15 places, be fixed in before spiral case 2 ports pressure wave reflection in spiral case 2 and the reflector 16 of locking, these noise elimination unit can be used in combination mutually.Spiral case 2 noise elimination unit are exactly a complete silencing apparatus in this programme, when different Environmental Conditions has different the requirement, can be with a plurality of spiral case 2 noise elimination unit combination, also can with the general impedance unit combination of eliminating the noise, as shown in Figure 7.Also having a kind of scheme is threads engaged on the outlet pipe 1 that has on the tailpipe 12 of silencing apparatus on screw thread and the dismountable noise elimination unit, can select to use according to different situations.The noise elimination unit that spiral case 2 in the technical program and air guide awl 8 are formed not only is applicable to silencing apparatus, can also separate the elimination that is used for other ambient noises, especially third and fourth, the pressure wave lock function also will play effective function at other field among five, six, seven embodiments.

The 1st silencing apparatus embodiment characteristics as shown in Figure 1 are: be connected with to-and-fro motion in axle 4 and the hole on muffler shell 11 on the spiral case 2, the centre of axle 4 is connected with rubber 6, the two ends of rubber 6 are spring 5 and

spring

7 and 11 unsteady connections of muffler shell, the waste gas of discharging when motor is when outlet pipe 1 is sprayed onto the spiral case 2, there is air guide to bore 8 direct exhaust and pressure wave enter anechoic trap 9 from both sides two ends in the spiral case 2, air in the anechoic trap 9 is pushed to the centre, equal and opposite in direction, two strands of air-flows and pressure wave that direction is opposite are cancelled each other, impact energy when having eliminated exhaust effectively, spiral case 2 drives axle 4 resistances that overcome spring 7 and moves right under the high-speed gas effect, engine speed is high more, impact force is big more, the displacement of spiral case 2 is just big more, the energy that consumes by spring 7 is big more, the exhaust Vietnamese side of spiral case 2 just, waste gas subsequently is through evenly oppositely flowing out after the buffering of air cushion, discharge from tap hole 3 and spiral case 2 ports, and noise elimination once more in the spiral case 2 is returned pressure wave reflection in back reflection border 10, and remaining pressure ripple is discharged from tailpipe 12 after eliminating the noise through the multi-cavity RESONANT CAVITY MUFFLER of microwell plate 10 and dividing plate 13 compositions.Change the elastic force size of spring 5 and spring 7, just can change the initial position and the displacement amount of spiral case 2,, just can arrange in pairs or groups to satisfy its requirement with different springs with a silencing apparatus for the close motor of discharge capacity.Air guide awl 8 in the spiral case 2 and anechoic trap 9 are made an integral body and are fixed in the spiral case 2, and the vibration damping layer is arranged in the middle of it.

The 2nd silencing apparatus embodiment characteristics as shown in Figure 2 are: when waste gas is sprayed onto the spiral case 2 through purifying back swallow-tail form outlet pipe 1 from flat symmetry, the spiral case 2 that is fixed on the muffler shell 11 with fin 15 is to bend with tubing to form, crooked tubing forms air guide awl 8 and anechoic trap 9 automatically, 8 direct exhaust and pressure wave enter anechoic trap 9 from both sides two ends are bored in air guide, air in the anechoic trap 9 is pushed to the centre, equal and opposite in direction, two strands of air-flows and pressure wave that direction is opposite are cancelled each other, impact energy when having eliminated exhaust effectively, and the waste gas in the anechoic trap 9 can not directly be discharged, so savings form the higher air cushion of pressure in anechoic trap 9, waste gas is subsequently discharged from spiral case 2 ports through evenly oppositely flowing out after the buffering of air cushion.Being connected with reflector 16 before spiral case 2 ports also locks pressure wave reflection in spiral case 2.

The 3rd silencing apparatus embodiment characteristics as shown in Figure 3 are: air guide awl 8 and spiral case 2 be affixed to become an integral body, having anechoic chamber 18 1 to reinstate fin 15 between them is fixed on the outlet pipe 1, the air-flow that has lonely shape reflector 16 directing exhaust gas pipes 1 to discharge in spiral case 2 bottoms oppositely flows out spiral case 2, inertia impact air-flow and pressure wave enter cavity one side of porous ceramics 14 and reflector 16 compositions under the constraint of taper porous ceramics 14, lonely shape reflector 16 reflexes to the cavity the inside with them and does not rebound, air-flow in the cavity can not be discharged and be formed the oppositely discharge subsequently of high pressure air cushion buffer gas flow at this moment, the focus of the pressure wave of reflection border 16 reflections is on porous ceramics 14, pressure wave is locked in oscillatory extinction elimination repeatedly in the cavity, the reflector 16 at tailpipe 12 places and the reflector in the spiral case 2 16 reflex to residual pressure wave in the cavity and lock, and the reflector in the spiral case 2 16 can stop back draught to enter outlet pipe 1, do not have back draught and pressure wave enters cylinder, so in outlet pipe 1, keep negative pressure to help the discharge of waste gas, be specially adapted to four stroke engine.

The 4th silencing apparatus embodiment characteristics as shown in Figure 4 are: the afterbody of air guide awl 8 falls in, and the central protuberance of spiral case 2 is come and the recess of air guide awl 8 forms anechoic trap 9, the afterbody and the spiral case 2 of the awl of air guide simultaneously 8 are locked in 2 li of spiral cases to pressure wave together, they one are reinstated fin 15 and are fixed on the muffler shell 11, the air-flow that outlet pipe 1 is discharged is crossed air guide awl 8 and is entered anechoic trap 9 buffer shock-absorbings of spiral case 2 and oppositely discharge, pressure wave then is locked in 2 li of spiral cases, and the reflector 16 at outlet pipe 1 and tailpipe 12 places reflexes to residual pressure wave in the spiral case 2.

The 5th silencing apparatus embodiment characteristics as shown in Figure 5 are: outlet pipe 1 has one section conic diffuse, the diffusing tube mouth of pipe have reflector 16 with pressure wave reflection in spiral case 2, there are air guide awl 8 and some anechoic traps 9 to be fixed in 11 li of muffler shells together in the spiral case 2, there are rubber 6 vibration dampings muffler shell 11 outsides, the air-flow reverse flow because the volume of spiral case 2 is limited, therefore the more common silencing apparatus of its back draught is more strong, be particularly suitable for two stroke engine, if diffusing tube is not equally applicable to four stroke engine.

The 6th silencing apparatus embodiment characteristics as shown in Figure 6 are: the front end of air guide awl 8 is anechoic chambers 18, the bottom is connected with porous ceramics 14, air guide awl 8 and spiral case 2 one are reinstated fin 15 and are fixed in 11 li of muffler shells, rubber 6 vibration dampings are then arranged outside the muffler shell 11, there are Perimeter Truss Reflector 16 and air guide awl 8 to form the cavity that is communicated with 2 li of spiral cases, the air-flow that outlet pipe 1 is discharged is crossed in the cavity that air guide awl 8 arrives spiral cases 2 the buffer shock-absorbing back reflection and is discharged, and the pressure wave of Pai Chuing then is locked in the cavity simultaneously.

The 7th silencing apparatus embodiment characteristics as shown in Figure 7 are: at 11 li reflectors that some groups of spiral cases 2 arranged and be complementary with it 16 of muffler shell, outlet pipe 1 and reflector 16 are fixed together, one group long air guide awl 8 and spiral case 2 are arranged before outlet pipe 1, air guide awl 8 and some groups of spiral cases 2 one are reinstated fin 15 and are fixed on the muffler shell 11, and there is rubber 6 its muffler shell 11 outsides.Perhaps air guide awl 8 usefulness fins 15 are fixed on the outlet pipe 1 of 11 li of muffler shells, and metal reinstated by they and reflector 16 1 or nonmetallic material are pressed into an integral body, and some groups of spiral case 2 usefulness fins 15 are fixed on the muffler shell 11.Spiral case 2 in front simultaneously also is the air guide awl of the spiral case 2 of back, and they form anechoic trap 9 jointly, and waste gas that outlet pipe 1 is discharged and pressure wave are by the back discharge that decay step by step of spiral cases 2 at different levels and reflector 16.Common silencing apparatus is further eliminated the noise the back from tailpipe 12 discharges to the waste gas of discharging.

The 8th silencing apparatus embodiment characteristics as shown in Figure 8 are: outlet pipe 1 is a stepped shaft, the waste gas gradation discharge that it is discharged in the shell 2 has reduced impact energy, vibration damping layer buffer shock-absorbing can be arranged in the spiral case 2, flow to the expansion chamber of back around the spiral case 2 through the waste gas of overexpansion buffering, and discharge from tailpipe 12.Be connected with reflector 16 at the port of spiral case 2 and tail end spiral case 2 is returned in pressure wave reflection, wherein reflector 16 can be installed separately also and can make an integral body with muffler shell 11.

Accompanying drawing 9 is that this programme is used for the scheme that environment is eliminated the noise, and as outdoor environments such as indoor environment or overhead roads, it is on the body 19 of building or other noise elimination unit the taper half slot to be arranged, and air guide awl 8 is hollow with the saving cost, and is fixed in the groove with fin 15.

Claims

1, a kind of silencing apparatus is connected with outlet pipe and tailpipe on muffler shell, it is characterized in that: the affixed spiral case of fin is arranged in the muffler shell, be connected with air guide awl and spiral case in the spiral case and form anechoic trap, outlet pipe stretches in the opening of spiral case.

2, silencing apparatus as claimed in claim 1 is characterized in that: port and tail end at spiral case are connected with reflector.

3, silencing apparatus as claimed in claim 1 is characterized in that: have the air guide taper to become anechoic trap in the spiral case, be formed with anechoic trap between the spiral case of the spiral case of front and back simultaneously.

4, silencing apparatus as claimed in claim 1 is characterized in that: there is dismountable noise elimination unit the silencing apparatus back, and it is the screw thread coupling on the outlet pipe on the noise elimination unit that screw thread and back are arranged on the silencing apparatus tailpipe.

5, silencing apparatus as claimed in claim 1 is characterized in that: be connected with to-and-fro motion in axle and the hole on muffler shell on the spiral case, be connected with rubber in the middle of the axle, the two ends of rubber have that spring and muffler shell are unsteady to be connected.

6, anechoic trap as claimed in claim 3 is characterized in that: it is flute profile on body, and air guide awl and affixed with fin is arranged in the groove.