CN103410588B - Diesel exhaust simulation generator and diesel particulate filter test system - Google Patents
Diesel exhaust simulation generator and diesel particulate filter test system Download PDFInfo
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- CN103410588B CN103410588B CN201310346419.8A CN201310346419A CN103410588B CN 103410588 B CN103410588 B CN 103410588B CN 201310346419 A CN201310346419 A CN 201310346419A CN 103410588 B CN103410588 B CN 103410588B
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- pipe
- reducer pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention aims to overcome the defects of the existing research methods and technologies and provides a diesel exhaust simulation generator. The diesel exhaust simulation generator is available for linear stable adjustment of parameters such as exhaust temperature, speed and particle concentration. According to the technical scheme for achieving the aim, the diesel exhaust simulation generator comprises a gas-solid ejector, a feeder and an air intake device. The invention further aims to overcome the defects of the existing research methods and technologies and provides a research and test system for filter efficiency, pressure drop characteristic and regeneration characteristic in the diesel particle filter on the basis of the diesel exhaust simulation generator..
Description
Technical field
The present invention relates to diesel engine vent gas carbon soot particles post-processing technology, particle trapper filter efficiency, drooping characteristic and the reproducing characteristic research test system being specifically related to the linearly adjustable diesel engine vent gas simulation generator of the parameters such as a kind of exhaust temperature, speed and granule density and be exhaust emissions source with this device, may be used for the performance study of different types of diesel engine particle catcher.
Background technique
Diesel engine has good power performance and the economy performance, makes it be applied widely; Diesel engine, compared with petrol engine, has efficiency high, and oil consumption is low, harmful gas HC, CO discharge amount is quite low, generally only have 1/tens of petrol engine, the NOx discharge of diesel engine and petrol engine are in the same order of magnitude, but diesel oil engine carbon smoke particulate discharge is 30 ~ 80 times of petrol engine.The porous carbon granules group that the soot particulate of diesel emission is 0.1 ~ 10 μm by particle diameter forms.The particulate matter that wherein particle diameter is less than 1 μm accounts for more than 90%, and these superfine particulate matters have very strong adsorption force, so almost all can be inhaled in human body, to the heart of human body and respiratory tract injury very large, often stick and have carcinogen.The result of study of chemical substance balancing method determination source of particulate is utilized also to show, the most fatal particle diameter is less than to the fine particle of 2.5 μm, diesel-oil vehicle is topmost emission source, diesel particulates pollution on the environment is day by day serious, has caused the close attention of countries in the world government and the public and has extensively paid attention to.Diesel engine particle catcher is the most practicability and effectiveness of generally acknowledging in the world at present and close to commercial diesel particulates post-processing technology.Mainly concentrate on filter efficiency, drooping characteristic and reproducing characteristic to the research of various particle trapper at present, main research method such as employing computer simulation emulation and prototype experiment etc.Especially imitation technology is widely applied, and can set flexibly the structural parameter of tail gas parameter and catcher.
But, because the parameters such as diesel engine exhaust emission temperature, speed, particle concentration, grain diameter cannot realize linearly adjustable, and emissions status is unstable, the tail gas of different parameters cannot realize prototype experimental verification to the filter efficiency of particle trapper, drooping characteristic, reproducing characteristic, analog simulation result lacks experimental verification means, seriously governs the research and development of high-performance particle trapper.
Summary of the invention
One of object of the invention is the deficiency existed for existing biology barrier, proposes a kind of diesel engine vent gas simulation generator, and this device can realize exhaust temperature, speed, the isoparametric linear stable of granule density is adjustable.
The technological scheme adopted for realizing the invention object is such, and a kind of diesel engine vent gas simulation generator, comprises gas-solid injector, charging device and air intake device.Described gas-solid injector comprises reducer pipe I.The mouth of pipe radius of the tail end of described reducer pipe I is R, the radius of the head end mouth of pipe is r
1, R
1>r
1.Described charging device is positioned at the top of reducer pipe I, and charging device comprises: the hopper that carbon powder particle is housed, and drive link, blanking screw rod and feeding pipe.Described hopper is a hollow container, and its upper end is uncovered, lower end has discharge port.The tube wall that described feeding pipe one end connects described discharge port, the other end inserts reducer pipe I.Above described hopper, speed-adjustable motor is installed, the blanking screw rod that one end connects the rotating shaft of speed-adjustable motor, the other end connection is positioned at hopper of described drive link.Described air intake device comprises air pump, electric heater, reducer pipe II and air intake pipe, and described air pump has intake grill and exhaust outlet.Described electric heater comprises the hollow casing that an inside is provided with some heater elements, and described hollow casing has intake grill and exhaust outlet.The mouth of pipe radius of the tail end of described reducer pipe II is R, the radius of the head end mouth of pipe is r
2, R
2>r
2.The exhaust outlet of one end connection air pump of described air intake pipe, the other end connect the intake grill of described electric heater, and the tail end of described reducer pipe II is connected with the exhaust outlet of described electric heater.The head end of described reducer pipe II is inserted into the tubular body of reducer pipe I from the tail end of reducer pipe I.
Further, described air intake pipe is provided with valve I, described feeding pipe is provided with valve II.
What deserves to be explained is, in described diesel engine vent gas simulation generator, carbon powder particle enters into reducer pipe I along with the rotation of blanking screw rod, and under the effect of described air pump, reducer pipe I inside becomes in fact an aerosol generator.Described air pump, heater and aerosol generator can realize linearly adjust and stable operation to the wind speed of simulated exhaust gas, temperature, carbon soot particles concentration and particle diameter respectively in diesel engine vent gas parameter variation range.
Furthermore, described air pump can produce the controlled air-flow of speed, and the flow velocity of this air-flow, in diesel engine vent gas speed variation, particularly, can adjust airspeed by the valve on adjustment air pump air intake pipe.And have employed electric heater in the present invention, its structure is: by doing to form every the electric heating tube of heat treated heater bucket wall and six roots of sensation band radiating fin and semicircle dividing plate, described dividing plate is mainly used in supporting heating pipe and changing airflow direction, air-flow is fully contacted with heating pipe radiating fin, improves the efficiency of heating surface; Heating system is adjusted by adjustment electrified regulation pipe group number and heater voltage, and heater can be heated to setting temperature the ambient air of air pump blowout, and this temperature is within diesel engine vent gas range of temperature.
The similar of hopper described in the present invention is in helixes feed equipment, and particle powder is contained in hopper, and speed-adjustable motor is connected with blanking screw rod by drive link, and namely drive link lower end is connected with blanking screw rod, and drive link is provided with mixing blade.Described blanking screw rod is threaded metallic rod on a body of rod.The lower end of described hopper is discharge port, and material blanking tube is connected with discharge port, and material blanking tube is enclosed within outside blanking screw rod, and as preferably, described material blanking tube coordinates with blanking screw rod small―gap suture.Described speed-adjustable motor drives drive rod rotation, and drive link drives again mixing blade and blanking bolt rotary.Particle in hopper rotates to decline by blanking screw flight gap and exports from hopper.Can by regulate motor speed adjust blanking screw rod rotating speed, namely can control discharge quantity, thus control the concentration of particulate matter in air-flow.
The present invention utilizes the kinetic energy of high velocity air to realize gas-solid mixing and powder carry, the air ejected from reducer pipe I high speed forms negative pressuren zone in gas-solid injector, and solid powder enters injector interior by valve under negative pressure gravitation and self-gravity action.Gas-solid mixture generation kinetic energy transmits, and both enter mixing chamber together, and here liquid speed field reaches balanced.
Another object of the invention is the deficiency existed for existing biology barrier, above-mentioned diesel engine vent gas simulation generator basis provides further a kind of filter efficiency for diesel engine particle catcher, drooping characteristic and reproducing characteristic study test system.
This particle trapper test system is except comprising whole parts of described diesel engine vent gas simulation generator, also comprise tail gas simulation generator test module, particle trapper test module and pipeline, the import that described pipeline one end connects the head end of described reducer pipe I, the other end connects particle trapper to be measured.Described tail gas simulation generator test module measures wind speed in described air intake pipe and gas temperature, and the wind speed at the exhaust outlet place of described electric heater and gas temperature.Described particle trapper test module measures the particle concentration of the import and export of described particle trapper to be measured, pressure, temperature and flow velocity.
What deserves to be explained is, described test control system can be measured the parameter such as simulated exhaust gas temperature, flow velocity, granule density that diesel engine vent gas simulation generator produces and shows in real time, and control system can carry out parameter adjustment according to setting parameter.
Test system of the present invention, can carry out measuring study to the granule density before and after different types of particle trapper and reclaimer thereof, pressure drop and reproducing characteristic etc.Each constituent element of device of the present invention and system adopts modular design, adopts the mode that removably connects between each module, can needing combination, fractionation or replacing according to test.
Accompanying drawing explanation
The nonlimiting examples that the device of the invention can be provided by accompanying drawing further illustrates.
Fig. 1 is the structural representation of diesel engine vent gas simulation generator;
Fig. 2 is diesel emission particulate particle trapper test system structure schematic diagram.
Embodiment
Below in conjunction with embodiment, the invention is described further, but should not be construed the above-mentioned subject area of the invention and be only limitted to following embodiment.Without departing from the technical idea of the present inventions, according to ordinary skill knowledge and customary means, make various replacement and change, all should be included in the protection domain of the invention.
embodiment 1:
A kind of diesel engine vent gas simulation generator, comprises gas-solid injector 10, charging device and air intake device.
Described gas-solid injector 10 comprises reducer pipe I 100.The mouth of pipe radius of the tail end of described reducer pipe I 100 is R
1, the head end mouth of pipe radius be r
1, R
1>r
1.Preferably, R
1=0.3r
1~ 0.8r
1.
Described charging device is positioned at the top of reducer pipe I 100, and charging device comprises: the hopper 6 that carbon powder particle is housed, and drive link 61, blanking screw rod 62 and feeding pipe 64.Described hopper 6 is a hollow container, and its upper end is uncovered, lower end has discharge port.The tube wall that described feeding pipe 64 one end connects described discharge port, the other end inserts reducer pipe I 100, namely the mouth of pipe of described feeding pipe 64 lower end is in the inside of reducer pipe I 100.Above described hopper 6, speed-adjustable motor 5 is installed, the blanking screw rod 62 that one end connects the rotating shaft of speed-adjustable motor 5, the other end connection is positioned at hopper 6 of described drive link 61.Charging device in the present embodiment is similar to common spiral charging device, it generally includes hopper 6, drive link 61, blanking screw rod 62 and feeding pipe 64 etc., speed-adjustable motor 5 drives blanking screw rod 62 to rotate by drive link 61, blanking screw rod is carved with by the downward-sloping screw thread of several angle, powder rotates conveying downwards along spiral turn trough road, screw rod rotational speed determines unit time discharge quantity.
Described air intake device comprises air pump 2, electric heater 3, reducer pipe II 101 and air intake pipe, and described air pump 2 has intake grill and exhaust outlet.Described electric heater 3 comprises the hollow casing that an inside is provided with the heater elements such as some electric heating wire, and described hollow casing has intake grill and exhaust outlet.The mouth of pipe radius of the tail end of described reducer pipe II 101 is R
2, the head end mouth of pipe radius be r
2, R
2>r
2, preferably R
1=0.3r
1~ 0.8r
1.In the present embodiment, described reducer pipe I 100 and reducer pipe II 101 are straight tubes that large, little, and preferably, it is identical with the Concentric Reducers shape used in common water pump.And work as R
1=0.5r
1, R
1=0.9R
2, R
2=0.5r
2time, be beneficial to aerocolloidal formation most.
The exhaust outlet of one end connection air pump 2 of described air intake pipe, the other end connect the intake grill of described electric heater 3, and the tail end of described reducer pipe II 101 is connected with the exhaust outlet of described electric heater 3.The head end of described reducer pipe II 101 is inserted into the tubular body of reducer pipe I 100 from the tail end of reducer pipe I 100.As preferably, the mouth of pipe of described reducer pipe II 101 in reducer pipe I 100 is positioned at the below of the described feeding pipe 64 lower end mouth of pipe.In the present embodiment, described air pump 2 can adopt air compressor, only needs the intake grill of the exhaust outlet of air compressor with electric heater 3 to be connected.
Further, described air intake pipe is provided with valve I 1, described feeding pipe 64 is provided with valve II 7.
During this device busy, the cool air in environment, under the pumping action of air pump 2, enters air pump 2 through valve 1.Cool air enters electric heater 3 with certain flow rate after air pump 2 pressurizes, and in the present embodiment, described electric heater 3 also has regulator 4.As preferably, heated after cool air fully contacts with the fin in electric heater 3, then entered in reducer pipe II 101.Meanwhile, start speed-adjustable motor 5, the carbon powder particle being contained in hopper 6 li, under the effect of mixing blade, transports downwards along the spiral channel on blanking screw rod, and carbon powder particle, under the acting in conjunction of the thrust of gravity and blanking screw rod, enters in reducer pipe I 100 through valve 7.Under the negative pressure graviational interaction that reducer pipe high velocity air causes, form certain density aerosol, through stable section stablize mix after form the simulated exhaust gas all having setup parameter, this simulated exhaust gas from reducer pipe I 100 head end ejection, with do test use.
embodiment 2:
The present embodiment provides a kind of particle trapper test system, it comprises the entire infrastructure of diesel engine vent gas simulation generator described in embodiment, also comprise tail gas simulation generator test module 11, particle trapper test module 9 and pipeline, described pipeline one end connect described reducer pipe I 100 head end, the other end connects the import of particle trapper 8 to be measured;
Described tail gas simulation generator test module 11 measures wind speed in described air intake pipe and gas temperature, and the wind speed at the exhaust outlet place of described electric heater 3 and gas temperature.
Described particle trapper test module 9 measures the particle concentration of the import and export of described particle trapper to be measured 8, pressure, temperature and flow velocity.
In the present embodiment, the diesel engine particle catcher (i.e. above-mentioned particle trapper to be measured 8) adopting said system to produce certain factory is tested.Described particle trapper to be measured 8 comprises a suction port and an air outlet, and the suction port of described particle trapper 8 to be measured is connected with the head end (i.e. the puff prot of reducer pipe I 100) of described reducer pipe I 100 by pipeline.The object of test will simulate diesel engine under different operating modes (startup, idle running, load etc.), the performance of particle trapper 8 and regenerability.
The working method of native system:
Cool air in environment, under the pumping action of air pump 2, enters air pump 2 through valve 1.Cool air enters electric heater 3 with certain flow rate after air pump 2 pressurizes.Heated after cool air fully contacts with the fin in electric heater, then entered in reducer pipe II 101.Meanwhile, start speed-adjustable motor 5, the carbon powder particle being contained in hopper 6 li, under the effect of mixing blade, transports downwards along the spiral channel on blanking screw rod, and carbon powder particle, under the acting in conjunction of the thrust of gravity and blanking screw rod, enters in reducer pipe I 100 through valve 7.Under the negative pressure graviational interaction that reducer pipe high velocity air causes, form certain density aerosol, through stable section stablize mix after form the simulated exhaust gas all having setup parameter, this simulated exhaust gas from reducer pipe I 100 head end ejection.This simulated exhaust gas enters particle trapper 8 to be measured, and the carbon soot particles in tail gas is discharged after filtering; Particle trapper test module 9 can be measured parameters such as the particle concentration before and after particle trapper, pressure, temperature, flow velocitys.
By the Serial regulation to tail gas Operational Limitss such as flow velocity, temperature, granule density and particle diameters.Namely by rotating speed or the air intake valve of adjustment air pump 2, to control the flow velocity of tail gas; By controlling the heating-up temperature (controlling the heating pipe quantity of opening) of electric heater 3, control the temperature of tail gas; By controlling the rotating speed of speed-adjustable motor 5, control tail gas middle particle concentration; In described hopper 6, load the powder of a certain domain size distribution on demand, control particle size distribution in tail gas.
Utilize this test system can carry out experimental research to the filter efficiency of particle trapper, drooping characteristic and reproducing characteristic, prototype can be completed and test the detailed performance experiment that cannot realize, may be used for the improvement of checking to analog simulation result and computation model.
Further, native system has several mode of operations: the parameter that diesel motor exhaust simulative generator can carry out Serial regulation mainly comprises airspeed (parameter 1), temperature (parameter 2), granule density (parameter 3), and the difference of can also distribute according to powder particle size (parameter 4) forms the aerosol of variable grain particle diameter.
Pattern 1: parameter 4 is constant; Select any one parameter (not selected two kinds of parameter constants) in adjustment parameter 1,2 and 3.The affecting laws of running parameter to particle trapper performance can be studied.As constant in domain size distribution, temperature, concentration, adjustment airspeed, research airspeed is to the affecting laws of particle trapper various aspects of performance.
Pattern 2: parameter 4 is constant; Any one selecting in parameter 1,2 and 3 immobilizes, and other two kinds of parameters not selected in adjustment 1,2 and 3, comprehensive study two kinds of parameters are to the compound influence rule of particle trapper.
Mode 3: can also experimentally need, adjusts three kinds of Operational Limitss simultaneously and domain size distribution is studied particle trapper performance.
Claims (3)
1. a diesel engine vent gas simulation generator, is characterized in that: comprise gas-solid injector (10), charging device and air intake device;
Described gas-solid injector (10) comprises reducer pipe I (100); The mouth of pipe radius of the tail end of described reducer pipe I (100) is R
1, the head end mouth of pipe radius be r
1, R
1>r
1;
Described charging device is positioned at the top of reducer pipe I (100), and charging device comprises: the hopper (6) that carbon powder particle is housed, and drive link (61), blanking screw rod (62) and feeding pipe (64); Described hopper (6) is a hollow container, and its upper end is uncovered, lower end has discharge port; The tube wall that described feeding pipe (64) one end connects described discharge port, the other end inserts reducer pipe I (100); Described hopper (6) top is provided with speed-adjustable motor (5), and one end of described drive link (61) connects the rotating shaft of speed-adjustable motor (5), the other end connects the blanking screw rod (62) being positioned at hopper (6);
Described air intake device comprises air pump (2), electric heater (3), reducer pipe II (101) and air intake pipe, and described air pump (2) has intake grill and exhaust outlet; Described electric heater (3) comprises the hollow casing that an inside is provided with some heater elements, and described hollow casing has intake grill and exhaust outlet; The mouth of pipe radius of the tail end of described reducer pipe II (101) is R
2, the head end mouth of pipe radius be r
2, R
2>r
2; The exhaust outlet of one end connection air pump (2) of described air intake pipe, the other end connect the intake grill of described electric heater (3), and the tail end of described reducer pipe II (101) is connected with the exhaust outlet of described electric heater (3); The head end of described reducer pipe II (101) is inserted into the tubular body of reducer pipe I (100) from the tail end of reducer pipe I (100).
2. diesel engine vent gas simulation generator according to claim 1, is characterized in that: described air intake pipe is provided with valve I (1), described feeding pipe (64) is provided with valve II (7).
3. adopt the particle trapper test system of device described in claim 1 or 2, it is characterized in that: also comprise tail gas simulation generator test module (11), particle trapper test module (9) and pipeline, the import that described pipeline one end connects the head end of described reducer pipe I (100), the other end connects particle trapper to be measured (8);
Described tail gas simulation generator test module (11) measures wind speed in described air intake pipe and gas temperature, and the wind speed at the exhaust outlet place of described electric heater (3) and gas temperature;
Described particle trapper test module (9) measures the particle concentration of the import and export of described particle trapper to be measured (8), pressure, temperature and flow velocity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310346419.8A CN103410588B (en) | 2013-08-11 | 2013-08-11 | Diesel exhaust simulation generator and diesel particulate filter test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310346419.8A CN103410588B (en) | 2013-08-11 | 2013-08-11 | Diesel exhaust simulation generator and diesel particulate filter test system |
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| Publication Number | Publication Date |
|---|---|
| CN103410588A CN103410588A (en) | 2013-11-27 |
| CN103410588B true CN103410588B (en) | 2015-06-17 |
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|---|---|---|---|
| CN201310346419.8A Expired - Fee Related CN103410588B (en) | 2013-08-11 | 2013-08-11 | Diesel exhaust simulation generator and diesel particulate filter test system |
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| CN (1) | CN103410588B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2546095A (en) * | 2016-01-08 | 2017-07-12 | Perkins Engines Co Ltd | System for simulating an aftertreatment of an engine |
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| CN103913418B (en) * | 2014-03-12 | 2016-07-06 | 中国人民解放军电子工程学院 | Biologic grain automatic spraying release device |
| CN104014285B (en) * | 2014-06-25 | 2016-01-13 | 西华大学 | A kind of aerosol generator of simulating diesel engine particulate stream |
| CN104833512B (en) * | 2015-04-14 | 2018-04-03 | 江苏大学 | A kind of device of simulated engine cylinder endoparticle motion |
| CN109736926B (en) * | 2019-01-04 | 2021-05-11 | 无锡威孚力达催化净化器有限责任公司 | Diesel engine DPF carbon loading capacity testing device and testing method |
| CN110102228B (en) | 2019-04-30 | 2020-06-02 | 清华大学 | Internal combustion engine exhaust gas particle flow evolution process simulation device for reducing automobile emission |
| CN115698476A (en) * | 2020-07-08 | 2023-02-03 | 康宁股份有限公司 | Increasing and measuring honeycomb body filtration efficiency |
| CN115450737B (en) * | 2022-07-08 | 2023-07-18 | 陕煤集团神木红柳林矿业有限公司 | Fuel vehicle tail gas simulation generating device |
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