CN2063981U - Purifying silencer with air divider - Google Patents

Abstract

The utility model relates to a purifying silencer with an air divider used for gasoline cars, comprising an air inlet pipe, a casing, a partial flow cap, a spoke, a fixed ring, a seal ring, filling material for vibration damping, catalyst and an exhaust pipe. The utility model is characterized in that the device of the partial flow cap make exhaust stream distributed uniformly on the end surface of the catalyst; the purifying effectiveness of the catalyst is developed fully; the stress and temperature distribution of the catalyst is improved to make chipping not easy, so the purifying effect and service life of products can be increased effectively. The utility model has the advantages of simple and reliable structure and low cost, and various specifications can be separately suitable for motor cars with gasoline motors of different displacement.

Description

Purifying silencer with air divider

The utility model is a kind of device that is used for gasoline car exhaust gas purification and noise elimination.

Though the automobile of one of modern transportation instrument has brought convenience for Human's production and life, but the noise of pollutant that it discharges (CO, HC, NOX) and generation is along with the increase of owning amount, be on the rise ground contamination environment constitutes a threat to human existence.To this, both at home and abroad for administering the discharging and the noise of automobile, once release various ways and administered the purification silencer of discharging by catalytic combustion, produced certain effect, but exist a common problem be, blast air is skewness on the end face of catalyzer, concentrate on the center portion, so not only make catalyzer can not bring into play overall efficiency, cause and local early stage poison and lost efficacy, and a temperature distribution on the catalyzer is differed greatly, thermal expansion amount does not wait and internal stress, causes the catalyzer that is made of ceramic monolith to produce cracked.

A kind of purifying muffler with flow distributor that the utility model is released by shunting cap, makes blast air uniform on the end face of catalyzer.Product has good purifying effect and certain noise elimination effect, and simple and reliable for structure, long service life, low cost of manufacture.Product has plurality of specifications, applicable to the exhaust gas purification and the noise elimination of various engine displacement gasoline cars, also can be used as the purifier outside engine of high-grade car.

The utility model is achieved in that purifying muffler is made up of suction tude, shell, seal ring, vibration damping filler, catalyzer and outlet pipe, and characteristics are to be fixed with to make blast air be uniformly distributed in the flow distributor of catalyzer end face between suction tude and catalyzer.This flow distributor is meant that one is hemisphere and the sphere shunting cap relative with suction tude, blast air is under the acting in conjunction of shunting cap and shell taper diffuser, impel air-flow to be evenly distributed on the whole end face of catalyzer, can not only give full play to the whole purification efficiency of catalyzer like this, and the stressed and temperature that has guaranteed the catalyzer end face evenly distributes, reduce significantly because of thermal expansion amount and do not wait and the cause of internal stress, it is cracked to cause the catalyzer that is made of ceramic monolith to produce, thereby the purifying effect and the working life of having improved product.The size of shunting cap and shape and to the distance of catalyzer end face depend on the end area of catalyzer.The shape need of shunting cap reduces fluid resistance as far as possible when changing the flowing to of blast air, can be hemisphere.Shunting cap can be at least 3 spoke and retaining ring soldering group integrator by quantity, keeps the distance of shunting cap to the catalyzer end face.Retaining ring is welded on one of them half shell of shell, as the axially locating of catalyzer.Total arrangement is arranged by suction tude, shunting cap, spoke, retaining ring, catalyzer, outlet pipe order successively.

The shell of purifying muffler is for splitting and have the stamping part structure of welding edge vertically, its shape of cross section depends on the shape of catalyzer, can for circular, two ends are tapered links to each other with outlet pipe with suction tude respectively, middle part punching out groove vertically is as the axially locating of catalyzer.Catalyzer is the combustion catalyst of rare-earth type cellular structure ceramic carrier, the flexible material that its volumetric usage and engine displacement are complementary, seal ring can adopt heatproof constitutes, place between shell and the catalyzer, with guarantee air-flow not from then on the position flow through, the vibration damping filler can be selected corrugated shape Stainless Steel Wire braided fabric for use, be packed between shell and the catalyzer by suitable tightness, make catalyzer from radially being able to flexible fastening, strengthen and bear the ability of vibrating and impacting in the use, but and the error in geometrical form of compensate for catalyst and thermal distortion phenomenon.The diameter of suction tude and outlet pipe depends on the needs of supporting vehicle, and the length of outlet pipe wherein is if no longer include vent connection in the supporting vehicle, then otherwise less than 300 millimeters, with the realization of the probe insertion depth that guarantees test fiducial mark defined.

Purifying muffler makes pollutant (CO, HC, NOX) harmful in the exhaust realize the quadric catalysis burning because catalyzer has reduced initiation temperature, changes innoxious substance (CO into ₂, N, H ₂O), reach the improvement of discharging.For guarantee realizing catalytic combustion, except that temperature conditions, also requiring the oxygen content in the exhaust to reach 5%, as can establish the secondary intake pipes oxygenating in addition in air inlet place when not reaching.The noise elimination structure of product adopts resistance noise reduction and reactive muffling to combine, and based on the resistance noise reduction of honeycombed catalyst, the noise elimination cavity that connects suction tude and outlet pipe two ends is an expanssion type reactive muffling structure.

The utility model is used for the purifying muffler of 680Q h type engine h, drag research institute that 3 products are carried out engine bench test through Shanghai vapour, average emission value CO after idling purifies is a 0.023%(purification ratio 99.3%), HC is 90PPm(purification ratio 95.5%), its pollutant load far below the prescribed limits of GB3842-83 (new production car CO is 5%, HC is 2500ppm, with car CO be 6%, HC is 3000ppm); Power performance is compared the peak output loss ratio with former car silencing apparatus increase by 0.88%.

Concrete structure of the present utility model is provided by following examples and accompanying drawing.

Fig. 1 is a cross-sectional view of the present utility model.

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

Referring to Fig. 1,2, this purifying muffler comprises suction tude 1, shell 2, shunting cap 3, spoke 4, retaining ring 5, seal ring 6, vibration damping filler 7, catalyzer 8 and outlet pipe 9.Above-mentioned shunting cap 3 is hemisphere, and diameter can be 36 millimeters of φ, and the centre of sphere to the distance of catalyzer can be 42 millimeters.Spoke 4 usefulness diameters are the steel wire of 3～4 millimeters of φ, and available 3 uniform shunting cap 3 and retaining rings 5 of being connected in are welded to form the shunting cap assembly parts.Retaining ring 5 can be bent into the ring-shaped work pieces that external diameter is 132 millimeters of φ with the round steel of 6.5 millimeters of φ.Seal ring 6 can twine flame-retardant fiber outward and make with the flexible material of heatproof.Vibration damping filler 7 can be with the Stainless Steel Wire braided fabric that is corrugated shape.Catalyzer 8 can be that 125 millimeters of φ, length are the non-noble metal or the noble metal combustion catalyst of 100 millimeters cellular structure ceramic carriers with two diameters.Shell 2 can adopt 2 half patterns that shell is involutory, is integral through the seam postwelding, and internal diameter can be 133 millimeters of φ, and two ends are tapered, and constitute noise elimination cavity 10,11 and 12, and their axial length can be 110,32 and 50 millimeters respectively.The internal diameter of suction tude 1 can be 51 millimeters of φ.The external diameter of outlet pipe 9 can be 42 millimeters of φ.

The exhaust of motor car engine flows into noise elimination cavity 10 from suction tude 1, under the effect of shunting cap 3, blast air is distributed on the end face of catalyzer 8, and the pollutant in the exhaust (CO, HC, NOX) changes innoxious substance (CO into by the quadric catalysis burning ₂, N, H ₂O), discharge from outlet pipe 9 through noise elimination cavity 12 again, finished the overall process that purifies and eliminate the noise.This embodiment is particularly useful for 492Q type gasoline engine car, also can be used for the suitable automobile of engine displacement.

Claims (1)

1, a kind of purifying muffler that has flow distributor that is applicable to gasoline car, it includes suction tude, shell, seal ring, vibration damping filler, catalyzer and outlet pipe etc., it is characterized in that: be provided with one between suction tude and the catalyzer and connect the spacing hemisphere face shunting cap relative with suction tude that be by at least three spokes and retaining ring.

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