CN201401213Y - Metal carrier-used retaining ring for POC of diesel vehicle - Google Patents

Abstract

The utility model relates to a metal carrier-used retaining ring for POC of a diesel vehicle, and is characterized in that wave-shaped metal barrier strips are fixed on circular metal strips to form the retaining ring; the retaining ring is welded with the casing of the POC, made of SUS 441 stainless steel plate, and is 1.5 mm to 2.5 mm in thickness; and the height of the barrier strip is 5 mm to15 mm. The retaining ring has simple structure, convenient manufacturing and low cost, and when the retaining ring is used in a POC sample piece, the detection result of an engine rack shows that theinfluence on the exhaust backpressure can be ignored.

Description

The metal carrier-use back-up ring of a kind of diesel-oil vehicle POC

Technical field:

The utility model relates to the metal carrier-use back-up ring of a kind of diesel-oil vehicle POC, is applied to the motor car engine industry, has satisfied the environmental protection standard requirement of Europe more than 4.

Background technique:

Harmful components in the automobile engine to exhaust mainly are PM, NOX, HC and CO etc.In 2～3 years, low emission level engine has become people's arguement, has been concerned about even has thirsted for an ideal of realization in the past.

The 2007 emission regulation demands automakers of American National Environmental Protection Agency (EPA) reduce particle (PM) and the two kinds of main pollutants of nitrogen oxide (NOX) in the vehicle exhaust simultaneously.This needs suitable skill, and what shortcut addresses this problem does not have to walk.By traditional method, reduce a kind of pollution and certainly will cause another kind of increase of polluting.As if the automaker be absorbed in predicament.

Under the pressure of Abgasgesetz, diesel engine for automobile just constantly carries out technology upgrading and improvement on the one hand, on the other hand, selects appropriate post-processing technology strategy and equipment, and for example, Europe 4 or Europe 5 emission standards are satisfied in reprocessing measures such as SCR, DPF, DOC, POC.The essence of SCR preprocessor technology is to utilize urea at high temperature to decomposite NH ₃, as the NH of reducing agent ₃React under the comprehensive function of catalyzer and temperature with the NOX in the engine exhaust, generate nontoxic N under the desirable operating mode ₂And H ₂O, thus reach the purpose of purification.But the complex structure of SCR after-treatment system, the cost of every cover becomes the obstacle of applying at 11000 yuan～25000 yuan.

The essence of DPF preprocessor technology is to utilize a kind of special carrier, for example the honeycomb hole of import and outlet end replaces ' wall stream ' formula pottery or the Carboround after the shutoff, the filter efficiency of ' black smoke ' of PM one class that fresh DPF preprocessor exemplar is discharged diesel-oil vehicle is the highest can to reach 90%, new car dispatches from the factory to detect and can reach Europe 4 or Europe 5 emission standards fully, but, costing an arm and a leg of this ceramic DPF carrier, can't be homemade, all monopolized in the world wide by ' NGK ' house journal of ' Corning ' company of the U.S. and Japan, not only the cost of every cover is at 7000 yuan～12000 yuan, and the easiest obstruction was lost efficacy, and became the obstacle of applying.

The essence of DOC preprocessor technology is the three-way catalytic converter (TWC) that is similar to the gasoline passenger car, is used for removing CO and HC in the tail gas, and carrier and catalyst technology comparative maturity all can domesticize, and price is low, the efficient height.But after being applied to diesel-oil vehicle, because the main object of its main processing is PM, only 10～30%, therefore, efficient is low, becomes the obstacle of applying to the removal efficient of PM.

The essence of POC preprocessor technology is earlier PM ' filtration ' or ' holding back ' get off, under the effect of catalyzer, carry out oxidation then, main component SOF partial oxygen among the PM is changed into CO2 and H2O, the PM particle size is reduced, eliminate the factor of its toxicity and harm, therefore, solved the essential problem that PM exceeds standard.The POC preprocessor can reach 50～80% to the treatment effeciency of PM, and blocked rate of fault is also well below DPF.Therefore, POC is the focus of foreign study, and is wherein, the most representative with Ecocat company.

The essence of POC preprocessor is advanced person's the carrier and the combination of catalyst technology.Wherein, carrier is the most key, not only influences performance, also influences cost and life-span.

The POC of Ecocat company carrier is its patented technology, and its essence is the metal honeycomb plate of structure uniqueness and the assemblying body of ultrafine metal fibers weaving felt.But cost an arm and a leg, homemade diesel-oil vehicle can not adopt in enormous quantities.

The POC carrier becomes POC preprocessor key in application.Some utilize some that the ultra thin high temperature resistant corrosion resistant plate makes ' Cellular board with and combination ', and for example, the patent No. is ' ternary cleaner metallic carrier ' patent of ' 02241118.6 '; The patent No. is ' corrugated ribbon and the metallic carrier thereof of Motor Vehicle ternary catalyst purifier metallic carrier ' patent of ' 200720088652.0 '; The patent No. is ' exhaust gas purifying metal carrier, use laminate exhaust gas purifying filter ' patent of ' 200810091662.9 '; The patent No. is ' a kind of method for making automobile tail gas three-element catalytic device with metal carrier ' patent of ' 200610114608.2 '; The patent No. is ' manufacture method of exhaust gas purifying metal carrier, exhaust gas purifying metal carrier and exhaust emission control filter ' patent of ' 200480036580.4 '; The patent No. is ' manufacture method of metallic carrier and metallic carrier ' patent of ' 200710003694.4 '; The patent No. is ' metallic carrier of motor vehicle vent gas purification catalysis agent ' patent of ' 99201749.1 '; The patent No. is ' honeycomb metal carrier ' patent of ' 00268303.2 '; The patent No. is ' metallic carrier of the outer ternary catalyst purifier of machine ' patent of ' 00243739.2 '; The patent No. is ' metallic carrier that is used for toxic emission control ' patent of ' 02202495.6 '; The patent No. is ' metallic carrier of new ceramics processing ' patent of ' 200410022788.2 '; The patent No. is ' metallic carrier for catalyst ' patent of ' 98125354.7 '; The patent No. is ' 03208434.X's ' ' honeycomb metal carrier ' patent; The patent No. is ' a kind of catalyst metal carrier with alumina layer ' patent of ' 99101110.4 '; The patent No. is ' metallic carrier that is used for internal combustion engine exhaust system ' patent of ' 98119279.3 '; The patent No. is ' 00100560.X's ' ' metal carrier for purifying waste gas ' patent; The patent No. is ' metal carrier catalyst that is used for waste-gas cleaning ' patent of ' 01111387.1 ' or the like, because the mass transfer of gas and the passage of heat transfer are through or are equal to perforation, therefore, bad to the treatment effect of PM, can't be applicable to the POC after-treatment device.

Some patents adopt the wire criss-crossing to be woven into the wire netting on plane, these net sheets are stacked together again, and for example the patent No. is ' netted ceramic monolith ' patent of ' 98248772.X '; The patent No. is ' netted ceramic monolith ' patent of ' 99253757.6 '; The patent No. is ' Cellulated wiremesh carrier of catalyzing and reducing nitrogen oxides ' patent of ' 200710010357.8 '; The patent No. is ' a kind of Cellulated wiremesh carrier with aluminum oxide coating layer and preparation method thereof ' patent of ' 200710010359.7 '; The patent No. is ' method of covering aluminum oxide coating on honeycomb shaped wire mesh carrier ' patent of ' 200810011365.9 '; The patent No. is ' Cellulated wiremesh carrier that is used for purifying exhaust air ' patent of ' 200810011366.3 '; The patent No. is ' 200420094705.6 ' ' area load nano-TiO ₂Metal screen ' patent or the like, because the passage of the mass transfer of gas and heat transfer is to be similar to throughly, the degree of air-flow path disorder is not high, the probability that the PM particle is collided and holds back is not high, therefore, bad to the treatment effect of PM, can't be applicable to the POC after-treatment device.

Some patents adopt complete foam metal as the post-treating metal carrier, though solved the problems referred to above, can be applied to small-scale occasion, but face the inferior position of cost, can't be applied to the production in enormous quantities of automobile, for example the patent No. is ' composite photocatalyst antimicrobial spume metal ' patent of ' 200320119469.4 '; The patent No. is ' a kind of preparation method of high porosity metal porous carrier materials ' patent of ' 200610156330.5 '; The patent No. is ' metal carrier for automobile tail gas purifier catalyst and preparation method thereof ' patent of ' 200510024944.3 '; The patent No. is ' 200410096609.X's ' ' a kind of foam metal hydrogenating catalyst and its production and application ' patent; The patent No. is ' a kind of Lacunaris metal carrier and preparation method thereof ' patent of ' 200710034317.7 ' or the like.

The carrier of above-mentioned various materials all relates to the problem that installs and fixes in housing, adopts some fixation, may exist carrier fixing not firmly, causes the loosening problem of carrier; Also may adopt some fixation, may possess the fixation of forging a good relationship, but the exhaust back pressure of motor is exerted an adverse impact.

Summary of the invention:

The purpose of this utility model is to provide the metal carrier-use back-up ring of a kind of diesel-oil vehicle POC, and it is by the combination of circular metal shelves bar and a kind of waveform metal shelves bar, have simple in structure, convenient welding; It is almost nil to the influence of exhaust back pressure to install the back additional.

The technical solution of the utility model is achieved in that the metal carrier-use back-up ring of a kind of diesel-oil vehicle POC, it is characterized in that: being fixed with waveform metal shelves bar on the circular metal shelves bar is ring washer, the housing welding of ring washer and POC.Back-up ring is the SUS441 corrosion resistant plate, and thickness is 1.5～2.5mm, and the height of blend stop is 5～15mm.

Good effect of the present utility model is the metal carrier-use back-up ring of the housing convenient welding of a kind of simple in structure and POC, weld strength after the welding can meet the demands, with the POC preprocessor that the fixing carrier of this back-up ring is formed, almost nil to the influence of engine exhaust back pressure.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a construction profile of the present utility model;

Structural representation when Fig. 3 uses for the utility model;

Embodiment:

Below in conjunction with accompanying drawing the utility model is further described: as described in Fig. 1,2, the metal carrier-use back-up ring of a kind of diesel-oil vehicle POC, it is characterized in that: be fixed with waveform metal shelves bar 3 on the circular metal shelves bar 2 and be ring washer, housing 1 welding of ring washer and POC.Back-up ring is the SUS441 corrosion resistant plate, and thickness is 1.5～2.5mm, and the height of blend stop is 5～15mm.

As shown in Figure 3, select material to be the SUS441 corrosion resistant plate when using, thickness is 1.5mm, cuts into the lath of width 10mm, according to the housing internal diameter of POC exemplar, calculates the length of intercepting lath, makes circular metal shelves bar 2; Selecting material is the SUS441 corrosion resistant plate, and thickness is 1.5mm, cuts into the lath of width 10mm, according to the housing internal diameter of POC exemplar and wave number or measured length as the base material that is rolled into the waveform blend stop, generating gear is rolled in employing, and waveform blend stop 3 is made in mechanical and hand-manipulated roll forming; In conjunction with the housing internal diameter of POC exemplar, intercepting waveform blend stop 3 is connected into whole blend stop with 2 argon arc weldings of circular metal shelves bar;

Height, internal diameter and design parameter according to the POC housing, at first at back-up ring of the inboard welding of the housing of the outlet end of POC, the welding part carries out the argon arc welding respectively in the position, dome end of waveform blend stop 3 and the junction of housing inboard from the both sides at bonding point; During the A type carrier of POC exemplar and Type B carrier interfolded from outlet end, finish at entrance point, before the ring washer welding of entrance point, this carrier is vertically put, on A type carrier surface topmost, place the plane steel plate of diameter less than the diameter 10～20mm of A type carrier, place 10 kilograms metal counterweight then thereon, make whole carrier closely knit, reduce the space, the welding part is in the position, dome end of waveform blend stop 3 and the junction of housing inboard, weld respectively from the both sides at bonding point, finish the welding of outlet end ring washer.Finish entrance point and the expanding duct of outlet end and the welding of turnover tracheae of this POC exemplar respectively, finish the making of POC exemplar finished product.Is this carrier the outlet pipe connection of 8.6 liters Europe 3 diesel engine with discharge capacity; Finish the installation of the temperature transducer of POC metallic carrier inlet tube and outer pipe; Finish the installation of POC metallic carrier inlet tube back pressure meter; Start and warm-up the engine; According to the ETC test procedure, select the operating point of 6 different engine speed and load, finish the measurement of engine exhaust back pressure, the result shows that the back pressure of POC metallic carrier of the present utility model is at 6～15kpa.

Running is after 100 hours continuously by operating mode for this motor, and the result of POC metallic carrier shows that the back pressure of POC metallic carrier still remains on 6～15kpa.

Adopting thickness is the corrosion resistant plate of 2.5mm, cuts into external diameter and internal diameter differs 8mm, and promptly width is the annulus of 8mm, finishes welding operation according to above process, makes the POC exemplar; Carry out engine bench test, back pressure was 8kpa when testing result showed low speed and load; Back pressure is 17kpa during the high speed high load.The engine exhaust resistance is that back pressure raises more than 10%, and VE Vehicle Economy is caused negative effect.

Claims (2)

1, the metal carrier-use back-up ring of a kind of diesel-oil vehicle POC is characterized in that: being fixed with waveform metal shelves bars (3) on the circular metal shelves bar (2) is ring washer, the housing of ring washer and POC (1) welding.

2, the metal carrier-use back-up ring of a kind of diesel-oil vehicle POC according to claim 1 is characterized in that described back-up ring is the SUS441 corrosion resistant plate, and thickness is 1.5～2.5mm, and the height of blend stop is 5～15mm.

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