CN104014285B - A kind of aerosol generator of simulating diesel engine particulate stream - Google Patents
A kind of aerosol generator of simulating diesel engine particulate stream Download PDFInfo
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- CN104014285B CN104014285B CN201410294033.1A CN201410294033A CN104014285B CN 104014285 B CN104014285 B CN 104014285B CN 201410294033 A CN201410294033 A CN 201410294033A CN 104014285 B CN104014285 B CN 104014285B
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Abstract
Simulate an aerosol generator for diesel engine particulate stream, belong to simulation diesel engine particulate stream with the aerosol generating device tested the performance of tail gas treatment system of diesel engine.Air inlet section is for providing stability of flow and adjustable cleaned air, aerosol segment occurred is for providing concentration stabilize and quantitative aerosol, aerosol dilution section is that carrier gas colloidal sol is to the concentration needed by a certain percentage, and sampling section is to provide satisfactory aerosol gas.The gas produced by air compressor successively by air cleaner, air inlet section mass flowmenter with dilution section mass flowmenter, by-pass and aerosol generating portion, dilute section DPF and aerosol dilution part, Sampling Interface and concentration monitor unit, sample section DPF.Apparatus of the present invention are energy-saving and environmental protection not only, and structure is simple, cost is low, dependable performance, and is regulated on a large scale aerosol concentration by many external square types, thus the various operating modes of more real simulation diesel engine.
Description
Technical field
The invention belongs to the strainability testing arrangement of vehicle exhaust after-treatment system, what be specifically related to is that the one in energy-saving and environmental protection field can simulate diesel engine particulate stream, and can realize the aerosol generating device of concentration adjustment.
Background technology
Diesel engine is due to its high thermal efficiency, low CO
2the advantages such as discharge, and be widely used in transport service.But its discharge quantity of particulate matter large (discharge capacity is 30 times ~ 80 times of same displacement gasoline engine), cause severe contamination to environment, harm humans is healthy, thus seriously limits its development.Therefore, strict discharge standard requires that effectively, reliably technology is granular material discharged to reduce.Technically, only lean on emission controls by improving combustion and improve fuel qualities and be difficult to satisfied current discharge standard.At present, the diesel engine meeting " state IV " Abgasgesetz generally have employed post-processing technology, and following stricter Abgasgesetz proposes higher requirement by post-processing technology.Diesel particulate trap (DPF, DieselParticulateFilter) is generally acknowledged the most effective particle purifying device (physics traps diesel particle, efficiency is usually higher than 95%), is also one of technology that in current purification techniques, commercial prospect is best.
At present, in laboratory research DPF, aerosol simulation diesel engine particulate stream is used to be a kind of relatively more conventional way.By changing aerosol concentration to simulate the exhaust particulate amount of diesel engine under different operating mode, eliminate directly carry out diesel engine experiment and bring fund, personnel and stand consumption.On aerosol generating device, domestic conventional a few money products mostly are external research and development, generally higher in price.Wherein, U.S. ATI company's T DA series aerosol generator makes solution atomization produce aerosol, its concentration stabilize, but its concentration adjustment means single (only regulating the dilution ratio of air) by using Laskin nozzle.
Summary of the invention
The object of this invention is to provide the aerosol generator of a kind of structure simulated diesel engine particulate stream simple, with low cost, to regulate on a large scale in several ways aerosol concentration, can the various operating modes of more real simulation diesel engine.
The object of the present invention is achieved like this: a kind of aerosol generator of simulating diesel engine particulate stream, aerosol generating portion structure is: compression plate is positioned at above supporting disk, the two is through being bolted on segment occurred pedestal, rotating disk is fitted between compression plate and supporting disk, and formed with compression plate and supporting disk respectively and be rotatably assorted, turntable shaft is connected with segment occurred spin motor shaft, compression plate has a venthole, this venthole is fixed with an aerosol gas off-take tube connector, the position of the supporting disk immediately below the venthole being positioned at compression plate has an air admission hole, this air admission hole is fixed with an aerosol air intake duct tube connector, rotating disk has a through hole, the distance at center to the center of turntable shaft of this through hole equals the distance of center to the center of turntable shaft of the venthole of compression plate, compression plate upper surface is fixed on as the conical funnel of splendid attire aerosol particle or the cylinder of bottom opening, the cylinder of this conical funnel or bottom opening is communicated with the blanking hole on compression plate, the distance at the center equaling the venthole of compression plate to the center of turntable shaft of the distance at center to the center of turntable shaft of the blanking hole of this compression plate.
Aerosol dilution part-structure is: dilution compression plate is positioned at above dilution supporting disk, the two is bolted on dilution segment base frame through other, dilution rotating disk is upper left, the right side is symmetrically arranged with left cylinder and right cylinder, a left side for dilution rotating disk, right cylinder is fitted between dilution compression plate and dilution supporting disk, and respectively with dilution compression plate with dilute supporting disk and formed and be rotatably assorted, dilution turntable shaft is connected with dilution section spin motor shaft, dilution compression plate upper surface is left, the right side has a left side symmetrically, right through hole, this left through hole is fixed with a carrier gas colloidal sol gas off-take tube connector, this right through hole is fixed with a second aerosol gas off-take tube connector, a left side for dilution compression plate, right through hole and a left side of diluting rotating disk, right cylinder is positioned at circumferentially same, dilution supporting disk is positioned at a left side for dilution compression plate, on position immediately below right through hole, correspondence has the left through hole of another one and the right through hole of another one, the left through hole of this another one is fixed with a free-air diffuser tube connector, the right through hole of this another one is fixed with a second aerosol air intake duct tube connector.
Air compressor outlet connects air inlet section air cleaner and air inlet section mass flowmenter in turn, the outlet of air inlet section mass flowmenter connects above-mentioned aerosol air intake duct tube connector, above-mentioned aerosol gas off-take tube connector and the outlet of air inlet section mass flowmenter are all connected to the second aerosol air intake duct tube connector through bypass line, the outlet of air inlet section air cleaner is connected to free-air diffuser tube connector after connecting dilution section mass flowmenter, carrier gas colloidal sol gas off-take tube connector is emptying after connecting sampling section DPF, pipeline between carrier gas colloidal sol gas off-take tube connector and sampling section DPF is provided with Sampling Interface, pipeline between carrier gas colloidal sol gas off-take tube connector and Sampling Interface is provided with concentration monitor unit.
Described air inlet section mass flowmenter outlet is emptying after being connected to after bypass line is connected with aerosol gas off-take tube connector and diluting section DPF; Described second aerosol gas off-take tube connector is emptying after being connected to dilution section DPF.
Venthole on described compression plate is two of left and right symmetry, these two ventholes are fixed with respectively an aerosol gas off-take tube connector, air admission hole on described supporting disk is two of left and right symmetry, these two air admission holes is fixed with respectively an aerosol air intake duct tube connector; Described two of being used as that the conical funnel of splendid attire aerosol particle or the cylinder of bottom opening are upper and lower symmetry, the cylinder of these two conical funnels or bottom opening is communicated with two blanking holes of the upper and lower symmetry on compression plate respectively.
Described concentration monitor unit is AVL opacity smoke meter.
Described compression plate lower surface and supporting disk upper surface are equipped with concave shaped step; Described cylinder is also provided with on it and opens foraminate round barrel cover.
Described rotating disk thickness is 2mm, and the diameter of the through hole of rotating disk is 4mm; Dilution rotating disk thickness is 5mm, and the internal diameter of the left and right cylinder on dilution rotating disk is 5mm, and height is 50mm.
Described air inlet section quality flowmeter flow quantity controls at 50 ~ 300L/min, segment occurred electric rotating machine rotating speed controls at 30 ~ 300r/min, dilution section electric rotating machine rotating speed and segment occurred electric rotating machine rotating speed are consistent or its 1/n, n is the common divisor of segment occurred electric rotating machine rotating speed, and dilution section quality flowmeter flow quantity controls at 10 ~ 300L/min.
Described segment occurred pedestal and dilution segment base frame are all provided with movable castor.
Described all gas path all adopts Ф 8 pneumatic tube to connect.
Described air inlet section air cleaner adopts three grades of air cleaners.The first order adopts FC level centrifugal oil-water separator, the solid ionic of complete filter 23 μ or larger, and the load of upstream gas moisture allows to reach 25000PPM and removes 99% moisture, the mist of oil of 40%; The second level adopts FT level main line filter to filter the solid ionic of 1 μ or larger completely, and the load of upstream gas moisture allows to reach 2000PPM and removes 100% moisture, the mist of oil of 70%; What the third level adopted is the micro-oil mist filter of FA, and glass fibre can filter the solid particles of 0.01 μ through the density of particular design, the mist of oil of 99.9999%.
The invention has the beneficial effects as follows:
1, apparatus of the present invention structure is simple, reliable.Conventional instrument, equipment is used to build.
2, pellet supply part-structure is simple, reliable.Utilize particle self gravitation to enter in rotating disk circular hole, there is identical aerosol sendout, can stable aerosol concentration be ensured and long-time continuous provides.
3, aerosol concentration scope is wide.In not change structure situation, the concentration of aerosol in acquisition interface can be changed by regulating air inlet section flow, segment occurred electric rotating machine rotating speed, dilution section electric rotating machine rotating speed and these four kinds of modes of dilution section flow, the exhaust particulate stream of simulation diesel engine under different operating mode, four kinds of modes are coordinated mutually, and maximum concentration can reach 18000 with least concentration ratio.
4, aerosol concentration scope can expand.The present invention is combined by using rotary particle to occur to carry out multimode with rotary dilution, regulates on a large scale, utilizes DPF to reclaim particle simultaneously and recycles.Aerosol sendout is changed by the thickness and aperture that change aerosol segment occurred rotating disk, and by changing aerosol dilution section turntable rotation cylinder heights, and in conjunction with above-mentioned four kinds of concentration adjustment modes, aerosol concentration scope can be expanded.
5, particle loaded is provided to DPF.The present invention removes aerosol dilution section and sampling section, increases DPF loaded segment, can carry out particle loaded to DPF.This device loads evenly, solves the problem of current particle loaded difficulty.In the present invention, dilution section, sampling section DPF just serve this effect.
6, apparatus of the present invention economy, energy-saving and environmental protection.Use the particle simulation diesel particulate bought also to produce corresponding aerosol, regulate its concentration to simulate the exhaust particulate amount of diesel engine under different operating mode, saved bring because directly carrying out diesel engine experiment fund, personnel and stand consumption; Whole system power consumption is low; Use three-stage filtration mode filtered air, use DPF to filter aerosol thus finally emptying, and the particle supplied during plant running is all filtered except collection, and recycling.
7, apparatus of the present invention are simple to operate, and design is unique, and application is strong, because its aerosol concentration scope is wide, except simulating diesel engine particles stream, also can apply the filtration system performance test, Atmospheric particulates research etc. of other field as chemical industry.
Accompanying drawing explanation
Fig. 1 is process equipment schematic diagram of the present invention.
Fig. 2-1 is the generating portion of aerosol shown in Fig. 1 structural representation (is the transverse sectional view of Fig. 2-2, should has gap between supporting disk and turntable shaft).
Fig. 2-2 is top views (not having round barrel cover state) of Fig. 2-1.
Fig. 3-1 is the part-structure of aerosol dilution shown in Fig. 1 schematic diagram (should have gap between dilution supporting disk and dilution rolling disc axle).
Fig. 3-2 is top views of Fig. 3-1.
Detailed description of the invention
See Fig. 1, this aerosol generator comprises air inlet section, aerosol segment occurred, aerosol dilution section and sampling section; Air inlet section is for providing stability of flow and adjustable cleaned air, comprising air compressor, air cleaner, mass flowmenter; Aerosol segment occurred is for providing concentration stabilize and quantitative aerosol, comprises pedestal, electric rotating machine, aerosol generating portion, and wherein, aerosol generating portion comprises supporting disk, rotating disk, compression plate and pellet supply part; Aerosol dilution section is that comprise pedestal, electric rotating machine, mass flowmenter, aerosol dilution part, DPF, wherein, aerosol dilution part comprises supporting disk, rotating disk, compression plate for carrier gas colloidal sol is to the concentration needed by a certain percentage; Sampling section is for providing collection, comprises DPF, concentration monitor unit, Sampling Interface.
Above-mentioned air compressor is the air for providing q.s; Air inlet section air cleaner is for providing clean air and using three-stage filtration mode to filter; Air inlet section mass flowmenter is for providing stability of flow and adjustable gas; Aerosol segment occurred electric rotating machine is for providing rotary power; Aerosol generating portion is for producing quantitative aerosol continuously; Aerosol dilution section electric rotating machine is for providing rotary power; Aerosol dilution section mass flowmenter is for providing stability of flow and adjustable gas; Aerosol dilution part is for transmitting quantitative aerosol continuously, and by a certain percentage carrier gas colloidal sol to need concentration; By regulating aerosol dilution section quality flowmeter flow quantity and electric rotating machine rotating speed, thus change aerocolloidal thinner ratio; Aerosol dilution section use DPF to filter the aerosol before and after dilution and reclaim many can particle thus finally emptying; Aerosol after sampling section DPF filters dilution also reclaims excess particles thus finally emptying; Concentration monitor unit is for monitoring aerosol concentration; Sampling Interface is used for providing gathering simulates diesel engine particulate stream; Aerosol segment occurred and aerosol dilution segment base frame are for providing reasonable connection and the installation of each instrument, equipment.
See Fig. 2-1, Fig. 2-2, above-mentioned aerosol generating portion structure is: compression plate 5-3 is positioned at above supporting disk 5-1, the two is fixed on segment occurred pedestal 5-8 through bolt 5-7, rotating disk 5-2 is fitted between compression plate and supporting disk, and formed with compression plate and supporting disk respectively and be rotatably assorted, turntable shaft is connected with segment occurred electric rotating machine 4 axle, compression plate has a venthole, this venthole is fixed with an aerosol gas off-take tube connector 5-6, the position of the supporting disk immediately below the venthole being positioned at compression plate has an air admission hole, this air admission hole is fixed with an aerosol air intake duct tube connector 5-5, rotating disk has a through hole, the distance at center to the center of turntable shaft of this through hole equals the distance of center to the center of turntable shaft of the venthole of compression plate, compression plate upper surface is fixed on as the conical funnel of splendid attire aerosol particle or the cylinder 5-4 of bottom opening, the cylinder of this conical funnel or bottom opening is communicated with the blanking hole on compression plate, the distance at the center equaling the venthole of compression plate to the center of turntable shaft of the distance at center to the center of turntable shaft of the blanking hole of this compression plate.
Venthole on described compression plate 5-3 is two of left and right symmetry, these two ventholes are fixed with respectively an aerosol gas off-take tube connector 5-6, air admission hole on described supporting disk 5-1 is two of left and right symmetry, these two air admission holes is fixed with respectively an aerosol air intake duct tube connector 5-5; Described two of being used as that the conical funnel of splendid attire aerosol particle or the cylinder of bottom opening are upper and lower symmetry, the cylinder of these two conical funnels or bottom opening is communicated with two blanking holes of the upper and lower symmetry on compression plate respectively.
Supporting disk and compression plate are bolted to be fixed on pedestal, and rotating disk is therebetween connected with spin motor shaft by axle.Supporting disk, compression plate, rotating disk are coaxial and have circular hole under same radius, supporting disk, compression plate are respectively equipped with aerosol air intake duct tube connector, aerosol gas off-take tube connector on hole, under same radius, above compression plate, be provided with the pellet supply part that particle is provided for on-line continuous.Pellet supply part-structure comprises cylinder and opens foraminate round barrel cover, and cylinder is for splendid attire particle, and round barrel cover is for preventing shedding of particle and entering of impurity, and opens aperture connection air.For reducing dry friction area, supporting disk upper surface, compression plate lower surface are provided with concave shaped step.By driving electric rotating machine, dial rotation, its hole is through supply portion, and particle falls into wherein, continues to rotate, until circular hole rotate to air-flow by some time, particle is dispelled, and forms aerosol.
See Fig. 3-1, Fig. 3-2, above-mentioned aerosol dilution part-structure is: dilution compression plate 9-3 is positioned at above dilution supporting disk 9-1, the two is fixed on dilution segment base frame 9-9 through other bolt 9-8, 9-2 is upper left for dilution rotating disk, the right side is symmetrically arranged with left cylinder and right cylinder, a left side for dilution rotating disk, right cylinder is fitted between dilution compression plate and dilution supporting disk, and respectively with dilution compression plate with dilute supporting disk and formed and be rotatably assorted, dilution turntable shaft is connected with dilution section electric rotating machine 7 axle, dilution compression plate upper surface is left, the right side has a left side symmetrically, right through hole, this left through hole is fixed with a carrier gas colloidal sol gas off-take tube connector 9-7, this right through hole is fixed with a second aerosol gas off-take tube connector 9-6, a left side for dilution compression plate, right through hole and a left side of diluting rotating disk, right cylinder is positioned at circumferentially same, dilution supporting disk is positioned at a left side for dilution compression plate, on position immediately below right through hole, correspondence has the left through hole of another one and the right through hole of another one, the left through hole of this another one is fixed with a free-air diffuser tube connector 9-5, the right through hole of this another one is fixed with a second aerosol air intake duct tube connector 9-4.
Supporting disk and compression plate are bolted to be fixed on segment occurred pedestal, rotating disk is therebetween connected with dilution section electric rotating machine by axle, support, compression plate, rotating disk is coaxial, and supporting disk and compression plate have circular hole under same radius, supporting disk is provided with the second aerosol air intake duct tube connector on hole, free-air diffuser tube connector, compression plate is provided with the second aerosol gas off-take tube connector on hole, carrier gas colloidal sol gas off-take tube connector, under same radius, rotating disk is provided with rotor, for the aerosol stored be released through aerosol air intake duct tube connector and enter.By driving electric rotating machine, dial rotation, when rotor rotates to the second aerosol air intake duct tube connector, aerosol is full of rotor, and unnecessary aerosol enters dilution section DPF; When rotor rotates to carrier gas colloidal sol gas off-take tube connector, constant flow air enters from free-air diffuser tube connector, thus the aerosol in dilution rotor.
Above-mentioned air inlet section is except air compressor, and all the other are all fixed on aerosol segment occurred pedestal; Sampling section is except concentration monitor unit, and all the other are all fixed on aerosol dilution segment base frame.On aerosol segment occurred pedestal, install successively by the order of air cleaner, electric rotating machine, mass flowmenter, rotating machine controller, mass flow meter controller, aerosol generating portion.On aerosol dilution segment base frame, install successively by the order of DPF, electric rotating machine, mass flowmenter, rotating machine controller, mass flow meter controller, aerosol generating portion, concentration monitor unit interface, Sampling Interface.
For convenience of mobile and fixing, movable castor installed by above-mentioned segment occurred pedestal and dilution segment base frame.
Above-mentioned each air flue pipeline is connected by Ф 8mm pneumatic tube (also claiming tracheae).
The controller that above-mentioned mass flow takes into account electric rotating machine be installed on be fixed on aerosol segment occurred and dilution segment base frame side instrument board on.
Above-mentioned electric rotating machine is fixed on pedestal by screw and electric rotating machine support, and connects location by pin, ensures that axle is coaxial with turntable shaft.
The thickness of above-mentioned aerosol segment occurred rotating disk is at 2mm, and the diameter of the through hole of rotating disk is 4mm, the thickness of aerosol dilution section rotating disk is at 5mm, a left side for dilution dish, right barrel bore is 5mm, height is 50mm, air inlet section flow-control is at 50 ~ 300L/min, aerosol segment occurred electric rotating machine rotating speed controls at 30 ~ 300r/min, aerosol dilution section electric rotating machine rotating speed and aerosol segment occurred electric rotating machine rotating speed are consistent or its 1/n(n is the common divisor of aerosol segment occurred electric rotating machine rotating speed), aerosol with what ensure to be stored in rotor at every turn, the flow-control of aerosol dilution section is at 10 ~ 300L/min, dilution section thinner ratio is according to aerosol dilution section electric rotating machine rotating speed and aerosol dilution section flow is the highest can be controlled in 1 ~ 320.
Above-mentioned concentration monitor unit can use AVL opacity smoke meter, measures an aerosol concentration every 10 minutes.Even if due to diesel engine under stationary conditions, granule density also has certain change, therefore allow aerosol change in certain limit, for this reason, need concentration monitor unit to monitor aerosol concentration, and when aerosol concentration departs from larger, manual adjustments dilution ratio is returned to and need concentration.
See Fig. 1, air compressor 1 exports and connects air inlet section air cleaner 2 and air inlet section mass flowmenter 3 in turn, air inlet section mass flowmenter 3 exports and connects above-mentioned aerosol air intake duct tube connector 5-5, above-mentioned aerosol gas off-take tube connector 5-6 and the outlet of air inlet section mass flowmenter are all connected to the second aerosol air intake duct tube connector 9-4 through bypass line, air inlet section air cleaner 2 is connected to free-air diffuser tube connector 9-5 after exporting and connecting dilution section mass flowmenter 8, carrier gas colloidal sol gas off-take tube connector 9-7 is emptying after connecting sampling section DPF10, pipeline between carrier gas colloidal sol gas off-take tube connector 9-7 and sampling section DPF10 is provided with Sampling Interface 12, pipeline between carrier gas colloidal sol gas off-take tube connector 9-7 and Sampling Interface 12 is provided with concentration monitor unit 11.
Described air inlet section mass flowmenter 3 export to be connected to after bypass line is connected with aerosol gas off-take tube connector 5-6 dilute section DPF6 after emptying; Described second aerosol gas off-take tube connector 9-6 is emptying after being connected to dilution section DPF6.Fig. 1 illustrates, device comprises air inlet section I, aerosol segment occurred II, aerosol dilution section III and sampling section IV.Air inlet section I is for providing stability of flow and adjustable cleaned air, comprises air compressor 1, air inlet section air cleaner 2, air inlet section mass flowmenter 3; Aerosol segment occurred II is for providing concentration stabilize and quantitative aerosol, comprises segment occurred electric rotating machine 4, aerosol generating portion 5; Aerosol dilution section III be for carrier gas colloidal sol by a certain percentage to the concentration needed, comprise dilution section DPF6, dilution section electric rotating machine 7, dilution section mass flowmenter 8, aerosol dilution part 9; Sampling section IV is for providing collection, and reclaims unnecessary aerosol particle, comprises sampling section DPF10, concentration monitor unit 11, Sampling Interface 12.
In Fig. 1, air compressor 1 is the air for providing q.s; Air inlet section air cleaner 2 is for providing clean air and using three-stage filtration mode to filter; Air inlet section mass flowmenter 3 is for providing stability of flow and adjustable gas; Segment occurred electric rotating machine 4 is for providing rotary power; ; Aerosol generating portion 5(or title aerosol generating device) be for producing quantitative aerosol continuously; Dilution section DPF6 filter the aerosol before and after dilution and reclaim many can particle thus finally emptying; Dilution section electric rotating machine 7 is for providing rotary power; Dilution section mass flowmenter 8 is for providing stability of flow and adjustable gas; Aerosol dilution part 9(or claim aerosol dilution device) be for transmitting quantitative aerosol continuously, and by a certain percentage carrier gas colloidal sol to the concentration of needs; By regulating aerosol dilution section mass flowmenter 8 flow and dilution section electric rotating machine 7 rotating speed, thus change aerocolloidal dilution ratio; Aerosol after sampling section DPF10 filters dilution and reclaim many can particle thus finally emptying; Concentration monitor unit 11 is for monitoring aerosol concentration; Sampling Interface 12 gathers simulation diesel engine particulate stream for providing.Whole device employs three grades of air cleaners, twice DPF, air inlet section air cleaner 2 is for providing clean air, prevent Atmospheric particulates and moisture from entering air inlet section mass flowmenter 3 and cause device damage with dilution section mass flowmenter 8, prevent from being mixed into contamination gas colloidal sol in aerosol simultaneously; Dilution section DPF6 and sampling section DPF10 prevents aerosol particle thing from entering air, contaminated environment, reclaims excess particles simultaneously and recycles.
See Fig. 1, when experiment starts, first open air inlet section mass flowmenter 3 and dilution section mass flowmenter 8, keep whole current path to be communicated with.Then open air compressor 1, regulate air inlet section mass flowmenter 3 and dilution section mass flowmenter 8, after stable reading, open segment occurred electric rotating machine 4 and dilution section electric rotating machine 7, after electric rotating machine stabilization of speed, aerosol concentration tends towards stability.In plant running process, also can regulate aerosol concentration by regulating air inlet section flow, segment occurred electric rotating machine 4 rotating speed, dilution section electric rotating machine 7 rotating speed and these four kinds of modes of dilution section flow, even regular change segment occurred electric rotating machine 4 realizes variable working condition aerosol concentration with dilution section electric rotating machine 7 rotating speed to be changed.When shutdown system, close successively with the order of dilution section mass flowmenter 8 with segment occurred electric rotating machine 4 and dilution section electric rotating machine 7, air compressor 1, air inlet section mass flowmenter 3.
See Fig. 1, aerosol segment occurred, dilution segment base frame are separate, and air inlet section I is except air compressor 1, and all the other are all fixed on the pedestal of aerosol segment occurred, sampling section IV is except concentration monitor unit 11, and all the other are all fixed on the pedestal of aerosol dilution section.On aerosol segment occurred pedestal, install successively by the order of air inlet section air cleaner 2, segment occurred electric rotating machine 4, air inlet section mass flowmenter 3, electric rotating mechanism device, mass flow meter controller, aerosol generating portion 5.Air inlet section air cleaner 2 take up space large, need preferentially to install, because of the similar frustum of its profile, choose the tangent installation of cylinder of mid diameter Ф 60mm and 60mm × 300mm and fix, due to three grades of dilutions, fixed effect is better; Because the particularity of segment occurred electric rotating machine 4 position and shared bulk are comparatively large, also need preferential installation, it is fixed on pedestal by screw and electric rotating machine support, should be noted the position of rotating shaft during installation; Choose segment occurred air cleaner 2 opposite air inlet section mass flowmenter 3 is installed and makes to be screwed; At air inlet section section mass flowmenter 3 homonymy, instrument board is installed, and is bolted, instrument board needs out the square hole of two 90mm × 90mm to place electric rotating mechanism device and mass flow meter controller; Aerosol generating portion 5 is bolted on pedestal, and ensures that rotating disk 5-2 is coaxial with segment occurred electric rotating machine 4, and connects location by pin.On aerosol dilution segment base frame, install successively by the order of dilution section DPF6, sampling section DPF10, dilution section electric rotating machine 7, dilution section mass flowmenter 8, electric rotating mechanism device, mass flow meter controller, aerosol dilution part 9, concentration monitor unit 11 interface, Sampling Interface 12.Installation process similar installation aerosol segment occurred pedestal, diluting section DPF6 here needs offside to install with sampling section DPF10; Afterwards according to airflow pipeline, concentration monitor unit 11 interface, Sampling Interface 12 are set at pipeline correct position.
See Fig. 1, each air flue pipeline of device is connected by Ф 8mm pneumatic tube, ensures that, after the shunting of air inlet section mass flowmenter 3 rear end, air-flow can not only be flowed out by by-pass and affect aerocolloidal generation, ensure that the unification of each interface simultaneously.Air inlet section mass flowmenter 3 flow-control is at 50 ~ 300L/min, segment occurred electric rotating machine 4 rotating speed controls at 30 ~ 300r/min, dilution section electric rotating machine 7 rotating speed and segment occurred electric rotating machine 4 rotating speed is consistent or its 1/n(n is the common divisor of segment occurred electric rotating machine 4 rotating speed), aerosol with what ensure to be stored in rotor at every turn, the flow-control of dilution section mass flowmenter 8 is at 10 ~ 300L/min, and dilution section thinner ratio can be controlled in 1 ~ 320 according to dilution section electric rotating machine 7 rotating speed with dilution section mass flowmenter 8 flow is the highest.Concentration monitor unit 11 can use AVL opacity smoke meter, measures an aerosol concentration every 10 minutes.Even if due to diesel engine under stationary conditions, granule density also has certain change, therefore allow aerosol change in certain limit, for this reason, need concentration monitor unit 11 to monitor aerosol concentration, and when aerosol concentration departs from larger, manual adjustments dilution ratio is returned to and need concentration.
Fig. 2-1, Fig. 2-2 illustrates, aerosol generating portion 5 comprises supporting disk 5-1, rotating disk 5-2, compression plate 5-3 and pellet supply part (referring to the cylinder 5-4 of conical funnel or bottom opening), its structure is: supporting disk 5-1 and compression plate 5-3 is bolted to be fixed on segment occurred pedestal 5-8, rotating disk 5-2 is therebetween connected with segment occurred electric rotating machine 4 (namely rotating disk 5-2 is fixed on segment occurred electric rotating machine 4 axle) by axle, supporting disk 5-1, compression plate 5-3, rotating disk 5-2 is coaxial and have circular hole under same radius, supporting disk 5-1, compression plate 5-3 is respectively equipped with aerosol air intake duct tube connector 5-5 on hole, aerosol gas off-take tube connector 5-6, under same radius, the pellet supply part that particle is provided for on-line continuous is provided with above compression plate 5-3.Pellet supply part-structure comprises cylinder 5-4 and opens foraminate round barrel cover, and cylinder is for splendid attire particle, and round barrel cover is for preventing shedding of particle and entering of impurity, and aperture is for connecting air.For reducing dry friction area, supporting disk 5-1, compression plate 5-3 are provided with step.By driving segment occurred electric rotating machine 4, rotating disk 5-2 to rotate, its hole is through pellet supply part, and particle falls into wherein, continues to rotate, until circular hole rotate to air-flow by some time, particle is dispelled, formation aerosol.
See Fig. 2-1, Fig. 2-2, aerosol generating portion is installed successively by the order of supporting disk 5-1, rotating disk 5-2, compression plate 5-3, and is bolted fixing.On segment occurred pedestal, be provided with turntable shaft pilot hole, when ensureing to install and operate, turntable shaft is coaxial with spin motor shaft, and connects location by pin.For reducing the sendout of aerosol particle as far as possible, ensure to send effect, the thickness of rotating disk design is 2mm, and aperture is 4mm simultaneously.On pretreatment, need manually in the cylinder 5-4 of pellet supply part, to add a certain amount of aerosol particle.This aerosol particle can select new material, also can use recycled materials in air cleaner, for saving experiment material, general choice for use salvage material.
Fig. 3-1, Fig. 3-2 illustrates, aerosol dilution part 9 comprises dilution supporting disk 9-1, dilution rotating disk 9-2, dilution compression plate 9-3, its structure is: dilution supporting disk 9-1 is bolted to be fixed on to dilute segment base frame 9-9 with dilution compression plate 9-3, dilution rotating disk 9-2 axle therebetween passes through shaft coupling or sells to be connected with dilution section electric rotating machine 7 axle, dilution supporting disk 9-1 has circular hole with dilution compression plate 9-3 under same radius, dilution supporting disk 9-1 is provided with the second aerosol air intake duct tube connector 9-4 on hole, free-air diffuser tube connector 9-5, dilution compression plate 9-3 is provided with the second aerosol gas off-take tube connector 9-6 on hole, carrier gas colloidal sol gas off-take tube connector 9-7, under same radius, it is (namely left that dilution rotating disk 9-2 is provided with rotor, right cylinder), for the aerosol stored be released through the second aerosol air intake duct tube connector 9-4 and enter.By driving dilution section electric rotating machine 7, dilution rotating disk 9-2 rotates, and when rotor rotates to the second aerosol air intake duct tube connector 9-4, aerosol is full of rotor, and unnecessary aerosol enters dilution section DPF6(see Fig. 1); When rotor rotates to carrier gas colloidal sol gas off-take tube connector 9-7, constant flow air enters from free-air diffuser tube connector 9-5, thus the aerosol in dilution rotor.
See Fig. 3-1, aerosol dilution part is installed successively by the order of dilution supporting disk 9-1, dilution rotating disk 9-2, dilution compression plate 9-3, and is bolted fixing.On dilution segment base frame, be provided with turntable shaft pilot hole, when ensureing to install and operate, turntable shaft is coaxial with spin motor shaft, and connects location by pin or shaft coupling.For ensureing the inflation effect of rotor, the thickness of rotating disk design is at 5mm, and rotor internal diameter is 5mm, high 50mm.
In Fig. 1, Fig. 2-1, Fig. 2-2, Fig. 3-1, Fig. 3-2, the air that air compressor 1 provides filters through air inlet section air cleaner 2, and fraction enters dilution section mass flowmenter 8, and fraction enters air inlet section mass flowmenter 3.When aerosol generating portion 5 air flue shutoff, air-flow is flowed out by by-pass (direct channel in Fig. 1 between air inlet section mass flowmenter 3 and dilution section DPF6 import), when aerosol generating portion 5 airway patency, air-flow is flowed out by by-pass and aerosol generating portion 5 simultaneously, now produces aerosol and makes whole air-flow become aerosol after interflow.When rotor does not rotate to the second aerosol air intake duct tube connector 9-4, whole air-flow is flowed out by by-pass and passes through dilution section DPF6 and filters emptying, when rotor rotates to the second aerosol air intake duct tube connector 9-4, fraction is flowed out by by-pass and passes through dilution section DPF6 and filters emptying, part aerosol is full of rotor, and its unnecessary aerosol enters dilution section DPF6 equally through the second aerosol gas off-take tube connector 9-6 and filters emptying; When rotor rotates to carrier gas colloidal sol gas off-take tube connector 9-7, constant flow air enters from dilution section mass flowmenter 8 and flows through free-air diffuser tube connector 9-5, mixes, dilutes, and flow out with rotor aerosol.Afterwards air-flow by sampling section DPF10 filter and emptying.Pipeline is before filtration respectively equipped with concentration monitor unit 11, Sampling Interface 12.
See Fig. 1, Fig. 2-1, Fig. 2-2, Fig. 3-1, Fig. 3-2, first the diesel engine condition that will simulate is determined, according to diesel engine bench experimental data determination aerosol concentration, and calculate suitable air inlet section flow, electric rotating machine rotating speed and aerosol dilution section thinner ratio.Such as, for a certain operating mode of DK4A diesel engine, its granule density is 0.02222mg/L(low concentration operating mode, and sets diesel engine particles bulk density as 100g/L).If air inlet section mass flowmenter 3 flow is 100L/min, the thickness of the rotating speed 60r/min of segment occurred electric rotating machine 4, rotating disk 5-2 is 2mm, and the aperture of two circular holes is 4mm, then aerosol particle concentration is that 3.1165mg/L(sets aerosol particle bulk density as 100g/L), then thinner ratio about 140.Therefore, air inlet section mass flowmenter 3 flow is decided to be 100L/min, the rotating speed of segment occurred electric rotating machine 4 is 60r/min, and the rotating speed of dilution section electric rotating machine 7 is 60r/min, and dilution section mass flowmenter 8 flow is decided to be 66L/min, can reach this concentration.Before the experiment, smokemetor need be utilized to demarcate aerosol concentration, to reach the object simulating diesel engine condition.In experimentation, also need to monitor aerosol concentration by concentration monitor unit 11, and when aerosol concentration departs from larger, manual adjustments dilution ratio is returned to and needs concentration.
Claims (10)
1. can simulate the aerosol generator of diesel engine particulate stream for one kind, it is characterized in that, aerosol generating portion structure is: compression plate (5-3) is positioned at supporting disk (5-1) top, the two is fixed on segment occurred pedestal (5-8) through bolt (5-7), rotating disk (5-2) is fitted between compression plate and supporting disk, and formed with compression plate and supporting disk respectively and be rotatably assorted, turntable shaft is connected with segment occurred electric rotating machine (4) axle, compression plate has a venthole, this venthole is fixed with an aerosol gas off-take tube connector (5-6), the position of the supporting disk immediately below the venthole being positioned at compression plate has an air admission hole, this air admission hole is fixed with an aerosol air intake duct tube connector (5-5), rotating disk has a through hole, the distance at center to the center of turntable shaft of this through hole equals the distance of center to the center of turntable shaft of the venthole of compression plate, compression plate upper surface is fixed on as the conical funnel of splendid attire aerosol particle or the cylinder (5-4) of bottom opening, the cylinder of this conical funnel or bottom opening is communicated with the blanking hole on compression plate, the distance at the center equaling the venthole of compression plate to the center of turntable shaft of the distance at center to the center of turntable shaft of the blanking hole of this compression plate,
Also have, aerosol dilution part-structure is: dilution compression plate (9-3) is positioned at dilution supporting disk (9-1) top, the two is bolted in dilution segment base frame (9-9) through other, dilution rotating disk (9-2) is upper left, the right side is symmetrically arranged with left cylinder and right cylinder, a left side for dilution rotating disk, right cylinder is fitted between dilution compression plate and dilution supporting disk, and respectively with dilution compression plate with dilute supporting disk and formed and be rotatably assorted, dilution turntable shaft is connected with dilution section electric rotating machine (7) axle, dilution compression plate upper surface is left, the right side has a left side symmetrically, right through hole, this left through hole is fixed with carrier gas colloidal sol gas off-take tube connector (9-7), this right through hole is fixed with a second aerosol gas off-take tube connector (9-6), a left side for dilution compression plate, right through hole and a left side of diluting rotating disk, right cylinder is positioned at circumferentially same, dilution supporting disk is positioned at a left side for dilution compression plate, on position immediately below right through hole, correspondence has the left through hole of another one and the right through hole of another one, the left through hole of this another one is fixed with a free-air diffuser tube connector (9-5), the right through hole of this another one is fixed with a second aerosol air intake duct tube connector (9-4),
Air compressor (1) outlet connects air inlet section air cleaner (2) and air inlet section mass flowmenter (3) in turn, air inlet section mass flowmenter (3) outlet connects above-mentioned aerosol air intake duct tube connector (5-5), above-mentioned aerosol gas off-take tube connector (5-6) and the outlet of air inlet section mass flowmenter are all connected to the second aerosol air intake duct tube connector (9-4) through bypass line, free-air diffuser tube connector (9-5) is connected to after air inlet section air cleaner (2) outlet connects dilution section mass flowmenter (8), carrier gas colloidal sol gas off-take tube connector (9-7) connects sampling section DPF(10) emptying afterwards, carrier gas colloidal sol gas off-take tube connector (9-7) and sampling section DPF(10) between pipeline on be provided with Sampling Interface (12), pipeline between carrier gas colloidal sol gas off-take tube connector (9-7) and Sampling Interface (12) is provided with concentration monitor unit (11).
2. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 1, it is characterized in that, described air inlet section mass flowmenter (3) outlet is connected to after bypass line is connected with aerosol gas off-take tube connector (5-6) dilutes section DPF(6) emptying afterwards; Described second aerosol gas off-take tube connector (9-6) is connected to dilution section DPF(6) emptying afterwards.
3. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 1 and 2, it is characterized in that, venthole on described compression plate (5-3) is two of left and right symmetry, these two ventholes are fixed with respectively an aerosol gas off-take tube connector (5-6), air admission hole on described supporting disk (5-1) is two of left and right symmetry, these two air admission holes is fixed with respectively an aerosol air intake duct tube connector (5-5); Described two of being used as that the conical funnel of splendid attire aerosol particle or the cylinder of bottom opening are upper and lower symmetry, the cylinder of these two conical funnels or bottom opening is communicated with two blanking holes of the upper and lower symmetry on compression plate respectively.
4. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 3, is characterized in that, described concentration monitor unit (11) is AVL opacity smoke meter.
5. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 4, is characterized in that, described compression plate (5-3) lower surface and supporting disk (5-1) upper surface are equipped with concave shaped step; Described cylinder (5-4) is also provided with on it and opens foraminate round barrel cover.
6. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 5, is characterized in that, described rotating disk (5-2) thickness is 2mm, and the diameter of the through hole of rotating disk is 4mm; Dilution rotating disk (9-2) thickness is 5mm, and the internal diameter of the left and right cylinder on dilution rotating disk is 5mm, and height is 50mm.
7. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 6, it is characterized in that, the flow-control of described air inlet section mass flowmenter (3) is at 50 ~ 300L/min, segment occurred electric rotating machine (4) rotating speed controls at 30 ~ 300r/min, dilution section electric rotating machine (7) rotating speed and segment occurred electric rotating machine (4) rotating speed are consistent or its 1/n, n is the common divisor of segment occurred electric rotating machine rotating speed, and mass flowmenter (8) flow-control of dilution section is at 10 ~ 300L/min.
8. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 7, is characterized in that, described segment occurred pedestal (5-8) and dilution segment base frame are all provided with movable castor.
9. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 8, is characterized in that, described all gas path all adopts Ф 8 pneumatic tube to connect.
10. a kind of aerosol generator of simulating diesel engine particulate stream according to claim 9, it is characterized in that, described air inlet section air cleaner (2) is three grades of air cleaner dilution section DPF(6) and sampling section DPF(10) be diesel particulate trap type.
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| US20020090054A1 (en) * | 2001-01-10 | 2002-07-11 | Michael Sogard | Apparatus and method for containing debris from laser plasma radiation sources |
| CN201867327U (en) * | 2010-03-31 | 2011-06-15 | 范维林 | Rotating disk type dust aerosol generating device |
| CN103410588A (en) * | 2013-08-11 | 2013-11-27 | 中国人民解放军重庆通信学院 | Diesel exhaust simulation generator and diesel particulate filter test system |
| CN203916635U (en) * | 2014-06-25 | 2014-11-05 | 西华大学 | A kind of aerosol generator of simulating diesel engine particulate stream |
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| JP4115145B2 (en) * | 2002-03-25 | 2008-07-09 | 独立行政法人産業技術総合研究所 | Aerosol generator and composite structure manufacturing apparatus including the same |
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| US20020090054A1 (en) * | 2001-01-10 | 2002-07-11 | Michael Sogard | Apparatus and method for containing debris from laser plasma radiation sources |
| CN201867327U (en) * | 2010-03-31 | 2011-06-15 | 范维林 | Rotating disk type dust aerosol generating device |
| CN103410588A (en) * | 2013-08-11 | 2013-11-27 | 中国人民解放军重庆通信学院 | Diesel exhaust simulation generator and diesel particulate filter test system |
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