CN2039744U - Wave-shaped connterflow sound damper - Google Patents

Abstract

The utility model relates to a wave-shaped counterflow sound damper. The anterior part of the sound damper is provided with a wind collecting catcher. The air stream of the wind passes through a wave-shaped sound deadening second chamber and a sound deadening third chamber through a wind collecting port. Waste air enters a sound deadening first chamber, a screen and the sound deadening third chamber through an inlet. Tortuous convection is formed between the wind collecting port and an air outlet. The blowing out of the waste air in a cylinder is accelerated. Simultaneously, multi-stage sound deadening purifying is conducted by adopting the wave-shaped sound deadening chamber. The fuel of a locomotive is saved by 2-5% of the utility model. Transport capability of the locomotive is increased by 5-10%. The content of carbon monoxide in discharged exhaust air is lower than the existing sound damper by more than 20%. Noise is decreased by 10-25%. The sound damper is suitable for diesel locomotives, like automobiles, tractors, submarines, etc. and fixed internal-combustion engines. The utility model is especially suitable for the locomotives in the area of high-temperature and high altitude anoxia.

Description

Wave-shaped connterflow sound damper

The utility model relates to a kind of waveform contrary wind formula silencing apparatus that is installed in engine exhaust gas discharging position.

Existing exhaust silencer for internal-combustion engine has various ways, and its effect mainly is to reduce the locomotive noise, purifies the harmful gas in the combustion gas.Thus, the lengthening muffler tail pipe road that has; The dividing plate that adds in silencing apparatus that also has increases the stroke of waste gas in anechoic room and the direction that changes air motion; Also have plenty of a plurality of bafflers are together in series.Add the locomotive of this class baffler, along with the reduction of noise, its power also reduces, and said transport power also reduces relatively, its main cause is: silencing apparatus has inhibition to the waste gas of discharging, the motor exhaust gas inside cylinder can not in time be discharged, and the new gas phase in the swap-in cylinder causes fuel oil fully not burn to reducing, this resistance, not only cause engine overheat, locomotive power descends, and oil consumption rate increases; Also make the CO content in the discharging waste gas increase, polluted environment.Current particularly automobile manufacture industry, the contradiction between noise elimination and the transport power is not solved yet yet.

The purpose of this utility model is to overcome the existing defective of above-mentioned baffler, solved the contradiction between internal combustion locomotive noise elimination and the transport power preferably,, can reduce noise simultaneously to provide a kind of rational in infrastructure, improve the locomotive transport power, reduce the waveform contrary wind formula silencing apparatus of harmful gas content in the waste gas again.

Characteristics of the present utility model are: by the wind speed that locomotive driving produced, the air-flow that makes wind by the wind gathering bucket of silencing apparatus front end through waveform eliminate the noise two Room, eliminate the noise three Room and waste gas outlet; Waste gas is eliminated the noise a Room after the air-flow that Lu sieve and eliminate the noise two Room and wind gathering mouth are come in converges by exhaust gas entrance, makes and forms tortuous convection current between wind gathering mouth and exhaust outlet, with acceleration blowing out waste gas in the sucking-off of exhaust gas inside cylinder and the silencing apparatus; Waste gas carries out discharging after the multistage noise reduction purifies through the waveform anechoic room simultaneously.The structure of this silencing apparatus comprises muffler shell, the waveform anechoic room, wind-gathering device, dividing plate and quieter material, it is characterized in that waveform two Room (7) of eliminating the noise place the waveform Room (2) of eliminating the noise, and link to each other with the porous corrugated tube of three Room of eliminating the noise, waveform is eliminated the noise and is had at least in the Room (2) two porous noise reduction purifiers to be set in waveform to eliminate the noise and constitute the above purifying silencing section of secondary on the outer wall of two Room (7), the waveform at silencing apparatus wind inlet place two Room (7) of eliminating the noise are connecting Lu sieve (6), the Lu is sieved an end wind gathering bucket (5) is housed, and waveform is eliminated the noise between a Room and noise elimination three Room and placed the porous corrugated tube (17) of three Room of eliminating the noise to be fixed with dividing plate (8) respectively and to inhale ripple gas barrier (10).

This model utility is described in detail in conjunction with the present embodiment below by accompanying drawing.

Fig. 1 is a side cut-away view of the present utility model

Fig. 2 is an external form schematic representation of the present utility model

Fig. 3 is the eliminate the noise assembling schematic representation of two Room of wind gathering bucket, Lu sieve and waveform

Fig. 4 and Fig. 5 are the decomposing schematic representation of Fig. 1

With reference to Fig. 1, Fig. 2, Fig. 3, waveform is eliminated the noise has exhaust gas entrance (1) on the housing of a Room (2), waveform two Room (7) of eliminating the noise place the waveform Room (2) of eliminating the noise, and be connected with porous corrugated tube (17) in three Room (9) of eliminating the noise, waveform is eliminated the noise and is with two porous noise reduction purifiers on the outer wall of two Room (7), many noise reduction Purge holes are arranged above, in order to increase frictional force, intensity of acoustic wave is decayed rapidly, the aperture of purifier inlet end is greater than the aperture, outlet side, and same waveform is eliminated the noise the inlet caliber of two Room and porous corrugated tube greater than the outlet caliber.Porous noise reduction purifier is respectively that porous honeycomb porcelain (3) and activated alumina (4) are made, its thickness is 2～5cm, each purifier by two with the expanded metal clamping of purifier equal diameters on waveform is eliminated the noise the outer tube wall of two Room, the eliminate the noise outer wall of two Room of the eliminate the noise inwall of a Room of the outer annulus edge welding wave of expanded metal, the open circles week edge joint of expanded metal.Tubular type waveform two Room (7) of eliminating the noise run through the waveform Room of eliminating the noise, and be connected with porous corrugated tube in three Room (9) of eliminating the noise, waveform two Room of eliminating the noise are connected with truncated cone shape Lu sieve (6) by the wind inlet end, the wind gathering bucket that has wind gathering mouth (5a) is inserted into an end of Lu sieve (6), and wind gathering bucket (5) is to be made by the bimetallic plates that fold up sound absorbing material.Waveform is eliminated the noise and is fixed with the waste gas of dividing plate (8) with isolated eliminate the noise a Room and three Room of eliminating the noise between a Room (2) and noise elimination three Room (9), and the silencing apparatus afterbody passes plug (11) and locates to be waste gas outlet (15).See Fig. 4 and Fig. 5, in the porous corrugated tube (17) in three Room (9) of eliminating the noise the suction ripple gas barrier (10) that 5 floor have made up is housed, the mesosphere is atresia sheet metal (12), and inferior skin is sound absorbing material (14), and outermost surface is two blocks of expanded metals (13); The internal layer of three Room (9), plug (11) of eliminating the noise is expanded metal (13), and the centre is sound absorbing material (14), and outermost surface is atresia sheet metal (12), and sound absorbing material can be a refractory fiber, as pearlite wool.Wind gathering mouth (5a) on the silencing apparatus wind gathering bucket (5) with clamp (16) after fixing should be all the time towards the direction of travel of locomotive.

Working procedure of the present utility model is as follows during locomotive operation: the waste gas that motor is discharged enters the waveform Room of eliminating the noise by silencing apparatus exhaust gas entrance (1), earlier through porous honeycomb porcelain purifier, then through activated alumina noise reduction purification once more, pass the waste gas of second cleaner because bump wind gathering bucket inner side surface reflexed enters waveform two Room of eliminating the noise through porous Lu sieve, when waste gas enters the porous corrugated tube of three Room of eliminating the noise, inhaled the obstruct of ripple gas barrier, make waste gas the porous section to around the diffusion, diffusion waste gas reflexed again enters porous section by plug one end, is discharged by waste gas outlet at last.

Because the wind gathering bucket has been installed on silencing apparatus, quickened toxic emission, the draft of wind gathering one's intention as revealed in what one says drains only the waste gas in the engine cylinder, has guaranteed the new gas that swap-in is enough, and then fuel oil inflation burning, and engine power is improved; Waste gas clashes into the transport power that the impact force that is produced transfers locomotive driving to wind gathering bucket inner side surface simultaneously, has promptly played the turn of speed effect that helps.Because the temperature at wind gathering mouth place is well below exhaust gas temperature, the air-flow pad exchange reduction exhaust gas temperature by waste gas and wind weakens the expansion noise that is brought by temperature, and has prolonged the working life of silencing apparatus.

The utility model has adopted the noise reduction of waveform anechoic room multistage to purify, and wherein a part of sound wave diffusion is subjected to the resistance of wavy wall and decays; Part sound wave is because the two Room waste gas of eliminating the noise are opposite with the Room waste gas direction of motion of eliminating the noise with wind gathering mouth wind-force direction, and sound wave mutually offsets mutually on the contrary; Another part passes the eliminate the noise sound wave of a locular wall and the disturbance that locomotive driving produces of waveform and offsets, the impingement rate height of sound wave, and reflectivity is low, adds to have adopted secondary porous silencer-purifier and acoustic material, makes that waste gas is further purified, noise reduction.

This utility model waste gas is the twice of sound wave distance by entrance to the stroke that exports, intensity of acoustic wave has decayed 1/4, use this silencer, can save locomotive fuel oil 2～5%, improve locomotive transport power 5～10%, CO content in the discharging waste gas has reduced more than 20% than existing silencer, reducing noise 10～25%. This silencer is applicable to automobile, tractor, steamer, submarine and fixing internal combustion engine, is particularly useful for the locomotive in high temperature, high altitude anoxia area.

Claims (6)

1, waveform is the formula silencing apparatus against the wind, comprise muffler shell, the waveform anechoic room, wind-gathering device, dividing plate and quieter material, it is characterized in that waveform two Room (7) of eliminating the noise place the waveform Room (2) of eliminating the noise, and link to each other with the porous corrugated tube of three Room of eliminating the noise, waveform is eliminated the noise and is had at least in the Room (2) two porous noise reduction purifiers to be set in waveform to eliminate the noise and constitute the above purifying silencing section of secondary on the outer wall of two Room (7), the waveform at silencing apparatus wind inlet place two Room (7) of eliminating the noise are connecting Lu sieve (6), the Lu is sieved an end wind gathering bucket (5) is housed, and waveform is eliminated the noise between a Room and noise elimination three Room and placed the porous corrugated tube (17) of three Room of eliminating the noise to be fixed with dividing plate (8) respectively and to inhale ripple gas barrier (10).

2, according to the described silencing apparatus of claim 1, the wind gathering bucket (5) that it is characterized in that having wind gathering mouth (5a) is inserted into an end of truncated cone shape Lu sieve, and wind gathering bucket (5) is to be made by the double-level-metal plate that interlayer is placed with sound absorbing material.

3, according to claim 1 or 2 described silencing apparatuss, it is characterized in that said porous noise reduction purifier is respectively that porous honeycomb porcelain (3) and activated alumina (4) are made, its thickness is 2～5cm, being fixed in the eliminate the noise inwall of a Room and waveform of waveform with iron plate with holes eliminates the noise on two chamber outer walls, the aperture of porous noise reduction purifier inlet end is greater than the aperture, outlet side, and the inlet caliber of eliminate the noise two Room and porous corrugated tube is greater than the outlet caliber.

4, according to the described silencing apparatus of claim 1, three Room (9) that it is characterized in that eliminating the noise, plug (11) are equipped with expanded metal (13), sound absorbing material (14) and atresia sheet metal (12) by internal layer from the outer to the inner successively to outer, suction ripple gas barrier.

5, according to the described silencing apparatus of claim 1, it is characterized in that wind gathering mouth (5a) on the fixing rear muffler wind gathering bucket (5) should be all the time towards the direction of travel of locomotive.

6,, it is characterized in that said sound absorbing material can be a refractory fiber, as pearlite wool according to claim 1 or 2 or 4 described silencing apparatuss.