SE538030C2 - Device for air purification and air intake system provided with such device - Google Patents
Device for air purification and air intake system provided with such device Download PDFInfo
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- SE538030C2 SE538030C2 SE1450701A SE1450701A SE538030C2 SE 538030 C2 SE538030 C2 SE 538030C2 SE 1450701 A SE1450701 A SE 1450701A SE 1450701 A SE1450701 A SE 1450701A SE 538030 C2 SE538030 C2 SE 538030C2
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- 238000004887 air purification Methods 0.000 title description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 239000003570 air Substances 0.000 claims description 88
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 5
- 239000012080 ambient air Substances 0.000 claims description 2
- 239000000428 dust Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
- B04C3/06—Construction of inlets or outlets to the vortex chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/18—Cleaning-out devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
- B04C3/04—Multiple arrangement thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/0212—Multiple cleaners
- F02M35/0216—Multiple cleaners arranged in series, e.g. pre- and main filter in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/022—Air cleaners acting by gravity, by centrifugal, or by other inertial forces, e.g. with moistened walls
- F02M35/0223—Air cleaners acting by gravity, by centrifugal, or by other inertial forces, e.g. with moistened walls by centrifugal forces, e.g. cyclones
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
- F02M35/048—Arranging or mounting on or with respect to engines or vehicle bodies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10013—Means upstream of the air filter; Connection to the ambient air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cyclones (AREA)
Abstract
538 0 SAMMANDRAG En anordning for forrening av luft i en luftkanalledning uppstroms om ett filter for rening av luft innefattar en cyklonuppsattning (7) med cykloner (8) som tillsammans tacker luftkanalledningens tvarsnittsarea och luften har att passera igenom pa sin vag till filtret for att avskilja partiklar fran luften. Omedelbart nedstroms om ett utlopp (9) fran uppsattningen (7) finns en krok (10) som definierar en riktningsforandring av namnda ledning. Vid uppsattningens (7) utlopp (9) är ett kanalelement (12) anordnat och utformat att frail utloppet definiera ett kanalparti (13) som luften har att passera igenom och som avgransas av bort fran utloppet mot en centrumaxel (14) hos detta konvergerande vaggar (15). SUMMARY A device for purifying air in an air duct upstream of an air purifying filter comprises a cyclone set (7) with cyclones (8) which together tackle the cross-sectional area of the air duct and the air has to pass through on its way to the filter to separate particles from the air. Immediately downstream of an outlet (9) from the set-up (7) there is a hook (10) which defines a change of direction of said conduit. At the outlet (9) of the set-up (7) a channel element (12) is arranged and designed to define the channel portion (13) through which the air has to pass and which is delimited away from the outlet towards a center axis (14) of this converging rock (15).
Description
538 0 ANORDNING FOR FORRENING AV LUFT SAMT LUFTINTAGSSYSTEM FORSETT MED SADAN ANORDNING UPPFINNINGENSTEKNISKAOMRADEOCH 5 BAKGRUNDSTEKNIK Foreliggande uppfinning avser en anordning for forrening av luft i en luftkanalledning uppstroms om ett filter for rening av luft, varvid anordningen innefattar en cyklonuppsattning med en eller flera cykloner som tillsammans tacker luftkanalledningens tvar- snittsarea och luften har att passera igenom pa sin vag till filtret for att via denna uppsattning avskilja fasta partiklar fran luften, samt varvid anordningen innefattar en omedelbart nedstroms om ett utlopp fran namnda cyklonuppsattning belagen krok pa 15 luftkanalledningen som definierar en riktningsforandring av namnda ledning med atminstone 60°, samt ett luftintagssystem enligt ingressen hos bifogade systempatentkrav. FIELD OF THE INVENTION FIELD OF THE INVENTION the cross-sectional area of the air duct conduit and the air has to pass through on its way to the filter to separate solid particles from the air via this set-up, and wherein the device comprises an immediately located downstream of an outlet of said cyclone set on the air duct conduit defining a direction change cable with at least 60 °, and an air intake system according to the preamble of the enclosed system patent claims.
Sadana anordningar anvands for att i mojligaste man undvika el- ler i vart fall forlanga intervallen med vilka byte av ett namnt filter eller underhall darav maste Mims, eftersom dessa atgarder är kostsamma att utfora. Av denna anledning är anordningar av detta slag speciellt intressanta i det fall luftkanalledningens inlopp är avsett att vara belaget i smutsiga och dammiga miljber, eftersom en god forrening av luften innan denna nar namnda fil- ter da är mycket vasentlig. Such devices are used to avoid or at least require the intervals at which replacements of a named filter or maintenance must be made by Mims, since these procedures are costly to perform. For this reason, devices of this kind are particularly interesting in the case where the inlet of the air duct is intended to be covered in dirty and dusty environments, since a good purification of the air before this filter is then very essential.
I uppfinningen exemplifierande och darmed belysande men pa intet satt begransande syfte kommer nu fallet av en namnd an- ordning i ett luftintagssystem for en forbranningsmotor i tunga 1 538 0 lastbilar att beskrivas. Anordningen kan dock vara anordnad i luftintagssystem som vare sig är applicerade i motorfordon eller är forbundna med nagon forbranningsmotor. 5 Tunga lastbilar är ofta verksamma i smutsiga och dammiga miljoer, och for att motorerna hos dessa lastbilar inte ska ta skada av alit damm anvands ett namnt filter med mycket hog verkningsgrad och i miljoer med sarskilt hoga halter av damm anvands ocksa en namnd forreningsanordning. Antalet cykloner i forre- ningsanordningens cyklonuppsattning kan vara en enda, men är typiskt sett nagra fa stora eller manga sma, som genom centrifugalverkan separerar damm fran luften. Den "centrifugerade" luften gar sedan vidare till filtret och renas ytterligare, medan dam-met kastas tillbaka till atmosfaren fran cyklonerna. Ju hogre verkningsgrad hos cyklonuppsattningen desto langre kan tiden bli mellan namnda kostsamma filterbyte och underhall. Det har dock visat sig att cyklonuppsattningens verkningsgrad är beroende av hur uppsattningen är anordnad i luftkanalledningen, och att den kan avvika vasentligt fran den verkningsgrad som har faststallts vid prover utforda i laboratoriemiljo. Exempelvis har det visat sig att en namnd cyklonuppsattning som provats i en "rak kanal", d v s en luftkanalledning som stracker sig rakt in mot cyklonuppsattningen och aven fran cyklonuppsattningens utlopp rakt bort fran cyklonuppsattningen, kan uppvisa en verkningsgrad av cirka 25 80%, men att denna verkningsgrad kan sjunka sa langt ner som till cirka 10% om cyklonuppsattningen sedan anordnas i en luftkanalledning, som omedelbart nedstroms om cyklonuppsattningens utlopp uppvisar en kraftig krok eller boj. Foljaktligen blir i ett sadant fall atminstone vissa av cyklonerna i cyklonuppsattningen i princip verkningslOsa. Just i verkliga fordonsinstallationer är det 2 538 0 ofta ornajligt att fa plats med idealiska langa ror eller ledningar fore- och efter cyklonuppsattningen och darmed blir prestandan lidande. In the invention exemplary and thus illustrative but in no way limiting purpose, the case of a named device in an air intake system for an internal combustion engine in heavy trucks will now be described. The device can, however, be arranged in air intake systems which are neither applied in motor vehicles nor connected to any internal combustion engine. Heavy trucks are often active in dirty and dusty environments, and in order to prevent the engines of these trucks from being damaged by dust, a named filter with a very high efficiency is used and in environments with particularly high levels of dust, a named purification device is also used. The number of cyclones in the cyclone set-up of the pollutant can be a single one, but is typically a few large or many small ones, which by centrifugal action separate dust from the air. The "centrifuged" air then passes to the filter and is further purified, while the dust is thrown back into the atmosphere from the cyclones. The higher the efficiency of the cyclone set-up, the longer the time can be between the said costly filter change and maintenance. However, it has been found that the efficiency of the cyclone set-up depends on how the set-up is arranged in the air duct line, and that it can deviate significantly from the efficiency that has been determined in tests challenging in the laboratory environment. For example, it has been found that a named cyclone set tested in a "straight channel", i.e. an air duct line extending straight towards the cyclone set and also from the outlet of the cyclone set straight away from the cyclone set, can exhibit an efficiency of about 80%, but that this efficiency can drop as far as about 10% if the cyclone set-up is then arranged in an air duct, which immediately downstream of the cyclone set-up outlet has a strong hook or buoy. Consequently, in such a case, at least some of the cyclones in the cyclone set will in principle become ineffective. Precisely in real vehicle installations, it is 2 538 0 often disgusting to fit with ideal long pipes or wires before and after the cyclone set-up and thus the performance suffers.
En anordning av det slag som definieras i inledningen, men utan en namnd krok omedelbart nedstroms om cyklonuppsattningens utlopp ar tidigare kand genom exempelvis US 2009/0151308 Al. A device of the type defined in the introduction, but without a named hook immediately downstream of the outlet of the cyclone set is previously known from, for example, US 2009/0151308 A1.
SAMMANFATTNING AV UPPFINNINGEN Syftet med foreliggande uppfinning är att tillhandahalla en anordning samt ett luftintagssystem av inledningsvis definierat slag, vilka är forbattrade i atminstone nagot hanseende relativt tidigare ' Detta syfte uppnas enligt uppfinningen vad galler anordningen genom att tillhandahalla en anordning av det slaget med de i den kannetecknande delen hos patentkrav 1 uppraknade sardragen. Uppfinningen grundar sig pa insikten att namnda krok belagen 20 omedelbart nedstroms om cyklonuppsattningens utlopp skapar en snedfordelning av luftflodet genom cyklonerna, sa att vissa av dessa far for hoga och vissa av cyklonerna for laga floden darigenom i jamforelse med det idealflode vid vilket respektive cykIon har en maximal verkningsgrad. Aven i fallet av en enda cyk- 25 Ion kommer genom namnda krok luftflodet igenom denna att vara betydligt hogre i vissa regioner an i andra och darmed cyklonens verkningsgrad att kraftigt sattas ned. Genom anordnandet av namnda kanalelement med kanalpartiet avgransat av konvergerande vaggar vid utloppet hos cyklonuppsattningen kommer luft- flOdet direkt nedstroms om cyklonuppsattningen att styras att bli 3 538 0 vasentligen jamnt fOrdelat over namnda kanalpartis tvarsnittsarea och darigenom vasentligen jamnt fordelat aver cyklonuppsattningens tvarsnittsarea, sa att i fallet av flera cykloner fladet kommer att vara vasentligen detsamma igenom var och en av 5 dessa och darmed ha den storleksordning som motsvarar en optimal verkningsgrad hos respektive cyklon. Detta innebar att intervallen mellan kostsamma filterbyten och underhall av filter kan forlangas hogst vasentligt hos en uppfinningsenlig anordning i forhallande till tidigare ' Enligt en utf6ringsform av uppfinningen är namnda kanalparti väsentligen rotationssymmetriskt eller rotationssymmetriskt i forhallande till namnda centrumaxel. Vid en sadan utformning av kanalpartiet erhaller luftflodet igenom cyklonuppsattningen genom forekomsten av namnda kanalparti en speciellt jamn fordelning Over cyklonuppsattningens tvarsnittsarea. Darvid har det visat sig vara fordelaktigt att kanalpartiet uppvisar vasentligen formen av en stympad kon eller formen av en stympad kon, vilket är foremal f6r en ytterligare utf6ringsform av uppfinningen. SUMMARY OF THE INVENTION The object of the present invention is to provide a device and an air intake system of an initially defined type, which are improved in at least some respect relatively previously. This object is achieved according to the invention as far as the device is concerned by providing a device of that kind with the features mentioned in the jug-drawing part of claim 1. The invention is based on the insight that said hook lining 20 immediately downstream of the outlet of the cyclone set-up creates an oblique distribution of the air flow through the cyclones, so that some of these are too high and some of the cyclones lower the flow thereby compared to the ideal flow maximum efficiency. Even in the case of a single cyclone, the air flow through it through said hook will be considerably higher in some regions than in others and thus the efficiency of the cyclone will be greatly reduced. By arranging said channel element with the channel portion delimited by converging rocks at the outlet of the cyclone set, the air flow directly downstream of the cyclone set will be controlled to be substantially evenly distributed over the cross-sectional area of said channel portion and thereby substantially evenly distributed along the cyclic of several cyclones the surface will be substantially the same through each of these and thus have the order of magnitude corresponding to an optimum efficiency of each cyclone. This meant that the intervals between costly filter replacements and maintenance of filters could be required at most substantially of a device according to the invention in relation to previous ones. According to an embodiment of the invention, said channel portion is substantially rotationally symmetrical or rotationally symmetrical in relation to said center axis. In such a design of the channel portion, the air flow through the cyclone set-up through the occurrence of said channel portion obtains a particularly even distribution over the cross-sectional area of the cyclone set-up. In this case, it has been found to be advantageous for the channel portion to have substantially the shape of a truncated cone or the shape of a truncated cone, which is a form of a further embodiment of the invention.
Enligt en annan utforingsform av uppfinningen bildar namnda vaggar en vinkel av 10°-60°, 20°-60° eller 30°-50° med namnda centrumaxel. Detta är passande vinklar pa konvergensen hos kanalpartiet for att uppna ett Over cyklonuppsattningens 25 tvarsnittsarea vasentligen likformigt fordelat luftflade igenom denna uppsattning. According to another embodiment of the invention, said cradles form an angle of 10 ° -60 °, 20 ° -60 ° or 30 ° -50 ° with said center axis. These are appropriate angles of convergence of the channel portion to achieve a substantially uniformly distributed air surface of the cyclone array 25 throughout this array.
Enligt en annan utforingsform av uppfinningen uppvisar cyklonuppsattningen flera i namnda luftkanalledning parallellt anord- nade cykloner, fler an tva cykloner, atminstone fyra cykloner eller 4 538 0 atminstone tio cykloner. Uppfinningen uppnar en speciellt markant forbattrad verkningsgrad hos en cyklonuppsattning som uppvisar ett flertal cykloner, speciellt ett storre antal cykloner, som da alla kommer att uppvisa en hog verkningsgrad, aven de 5 som i franvaro av namnda kanalparti skulle ha en i det narmaste forsvinnande lag verkningsgrad. According to another embodiment of the invention, the cyclone set-up has several cyclones arranged in parallel in the said air duct duct, more than two cyclones, at least four cyclones or 4,548 at least ten cyclones. The invention achieves a particularly markedly improved efficiency of a cyclone set having a plurality of cyclones, especially a larger number of cyclones, which will then all have a high efficiency, even those which in the absence of said channel portion would have an almost disappearing layer of efficiency. .
Enligt en annan utforingsform definierar namnda krok en namnd riktningsforandring av 70-10, 80-1000, vasentligen 900 eller 90°. NormaIt forbinder en namnd krok luftkanalledningspartier som forloper vasentligen i rat vinkel relativt varandra. According to another embodiment, said hook defines a named change of direction of 70-10, 80-1000, essentially 900 or 90 °. NormaIt connects a named hook air duct conduits which essentially run at a right angle relative to each other.
Det uppfinningsenliga syftet uppnas vad avser luftintagssystemet genom tillhandahallande av ett luftintagssystem enligt bifogade sjalvstandiga luftintagssystempatentkrav. Fordelarna med ett sa- dant system framgar med all onskvart tydlighet av beskrivningen ovan av den uppfinningsenliga anordningen. The object according to the invention is achieved with regard to the air intake system by providing an air intake system according to the appended independent air intake system patent claims. The advantages of such a system are apparent from the above description of the device according to the invention.
Uppfinningen avser aven ett motorfordon som uppvisar ett luftin- tagssystem enligt uppfinningen. The invention also relates to a motor vehicle which has an air intake system according to the invention.
Ytterligare fordelar med samt fordelaktiga sardrag has uppfinningen framgar av den nedan foljande beskrivningen. 25 KORT BESKRIVNING AV RITNINGARNA Har nedan beskrivs en sasom exempel anford utforingsform av uppfinningen under hanvisning till bifogade ritningar, pa vilka: 538 0 Fig 1är en mycket fOrenklad vy illustrerande ett luftintags- system far en forbranningsmotor hos ett motorfordon av det uppfinningsenliga slaget, Fig 2illustrerar schematiskt en anordning av det slag som foreliggande uppfinning avser, och Fig 3är en Fig 2 motsvarande vy av en anordning enligt en utforingsform av uppfinningen. Additional advantages and advantageous features of the invention will become apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS The following is an example of an embodiment of the invention with reference to the accompanying drawings, in which: Fig. 1 is a very simplified view illustrating an air intake system of an internal combustion engine of a motor vehicle of the type according to the invention; schematically a device of the type to which the present invention relates, and Fig. 3 is a Fig. 2 corresponding view of a device according to an embodiment of the invention.
DETALJERAD BESKRIVNING AV EN UTFORINGSFORM AV UPPFINNINGEN I Fig 1 illustreras mycket schematiskt den allmanna uppbyggna- den av ett luftintagssystem 1 for en forbranningsmotor av den typ som foreliggande uppfinning avser och vilket innehaller en anordning for forrening av luft av det slag som avenledes foreliggande uppfinning avser. Luftintagssystemet är anordnat i ett schematiskt antytt motorfordon 2 och innefattar ett luftinlopp 3 i form av en s k grill via vilket omgivningsluft är avsedd att sugas in i luftintagssystemet. Systemet innefattar vidare en luftkanalledning 4 for ledning av den via luftinloppet insugna luften till den ytterst schematiskt antydda forbranningsmotorn 5, vilken kan vara av godtyckligt slag och t ex uppvisa godtyckligt antal cylind- rar. Systemet uppvisar vidare ett i luftkanalledningen 4 anordnat filter 6 for rening av luften och ett i namnda ledning i luftens vag mot forbranningsmotorn uppstroms om filtret anordnad cyklonuppsattning 7 med ett start antal, t ex tio, parallellt anordnade cykloner 8 som tillsammans tacker luftkanalledningens tvar- snittsarea och luften har att passera igenom for avskiljande av 6 538 0 fasta partiklar fran luften. Cyklonerna kan ha godtycklig utformning. DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION Fig. 1 very schematically illustrates the general construction of an air intake system 1 for an internal combustion engine of the type to which the present invention relates and which includes an air purification device of the type to which the present invention relates. The air intake system is arranged in a schematically indicated motor vehicle 2 and comprises an air inlet 3 in the form of a so-called grill via which ambient air is intended to be sucked into the air intake system. The system further comprises an air duct line 4 for directing the air sucked in via the air inlet to the extremely schematically indicated internal combustion engine 5, which can be of any kind and, for example, have any number of cylinders. The system further comprises a filter 6 arranged in the air duct line 4 for purifying the air and a cyclone set 7 arranged in the said line in the air towards the internal combustion engine upstream of the filter with a starting number, for example ten, cyclones 8 arranged in parallel. and the air has to pass through to separate 6,538 solid particles from the air. The cyclones can have any design.
Omedelbart nedstroms om ett utlopp 9 fran cyklonuppsattningen 7 är en krok 10 pa luftkanalledningen 4 anordnad, och denna krok definierar en riktningsforandring av ledningen med 90°. Just i motorfordon, sasom tunga lastbilar, kan det ibland vara nodvandigt att anordna en sadan krok efter en namnd cyklonuppsattning pa grund av den platsbrist som raider. Immediately downstream of an outlet 9 from the cyclone set-up 7, a hook 10 on the air duct line 4 is arranged, and this hook defines a change of direction of the line by 90 °. Especially in motor vehicles, such as heavy trucks, it can sometimes be necessary to arrange such a hook after a named cyclone set-up due to the lack of space that raids.
Under ideala forhallande uppvisar typiskt sett cyklonerna 8 hos en namnd cyklonuppsattning en verkningsgrad av cirka 70-80% for en viss danrimstorlek, d v s de avlagsnar tillsammans 70-80% av de fasta partiklarna i luften i det fall luftflodet igenom cyklon- uppsattningen 7 är likformigt fordelat Over cyklonerna. Detta är fallet om cyklonuppsattningen är anordnad i en "rak kanal", d v s en luftkanalledning som vid cyklonuppsattningens utlopp fortsatter i samma riktning som den hade vid inloppet. De partiklar som sedan är kvar tar filtret 6 i stort sett helt hand om. Detta innebar att hastigheten med vilken filtret 6 blir fullt är direkt beroende av verkningsgraden hos cyklonuppsattningen 7. Under ideal conditions, the cyclones 8 of a named cyclone set typically have an efficiency of about 70-80% for a certain danrim size, ie they together deposit 70-80% of the solid particles in the air in case the air flow through the cyclone set 7 is uniform. distributed Over the cyclones. This is the case if the cyclone set-up is arranged in a "straight channel", i.e. an air duct line which at the outlet of the cyclone set-up continues in the same direction as it had at the inlet. The particles that are then left are largely taken care of by filter 6. This meant that the rate at which the filter 6 becomes full is directly dependent on the efficiency of the cyclone set 7.
I Fig 2 illustreras vad som hander nar namnda luftflode passerar cyklonuppsattningen 7 och kroken 10 hos det i Fig 1 visade luft- 25 intagssystemet. Genom forekomsten av namnda krok 10 kommer luftflodet igenom cyklonuppsattningen 7 att fordela sig olikformigt Over cyklonerna 8, sa att ett forhojt luftflode kommer att resultera i cyklonerna 8 vars utlopp är belaget narmast luftkanalledningens fortsattning 11 efter kroken 10, medan ett forminskat luft- fliide kommer att resultera i cyklonerna 8" avlagsna fran denna 7 538 0 luftkanalledningsfortsattning 11. Skiljer sig namnda luftflade igenom en cyklon markant ifran det den är utformad far kan dess verkningsgrad sjunka till en brakdel av vad den är vid optimalt luftflode, sasom t ex ned till cirka 10%, aven for cykloner med ett forhojt luftflode igenom sig. Detta innebar da att tidsperioden tills filtret 6 är fullt kommer att forkortas vasentligt i forhallande till ett optimalt likformigt luftflode igenom hela cyklonuppsattningen, t ex till en fjardedel. Fig. 2 illustrates what happens when said air flow passes the cyclone set-up 7 and the hook 10 of the air intake system shown in Fig. 1. Due to the occurrence of said hook 10, the air flow through the cyclone set-up 7 will be distributed non-uniformly over the cyclones 8, so that an increased air flow will result in the cyclones 8 whose outlet is coated closest to the continuation of the air duct line 11 after the hook 10, while a reduced air flow will result in the cyclones 8 "removed from this air duct continuation 11. If said air surface through a cyclone differs markedly from the one it is designed for, its efficiency can drop to a fraction of what it is at optimal air flow, such as down to about 10 This also means that the time period until the filter 6 is full will be significantly shortened in relation to an optimally uniform air flow throughout the cyclone set-up, for example to a quarter.
Foreliggande uppfinning tillhandahaller dock en losning pa detta problem, och en mojlig utforingsform av en anordning far forrening av luft illustreras schematiskt i Fig 3. Denna anordning är forsedd med ett vid cyklonuppsattningens 7 utlopp 9 anordnat kanalelement 12 utformat att fran utloppet definiera ett kanalparti 13 som luften har att passera igenom och som avgransas av bort fran utloppet mot en centrumaxel 14 hos detta, vilken är riktad i luftflodesriktningen genom cyklonerna 8, konvergerande vaggar 15.Kanalpartiet13ärforetradesvisvasentligen rotationssymmetriskt i forhallande till centrumaxeln 14, och i det i Fig 3 visade fallet galler detta, aven om kanalpartiet dar inte är helt rotationssymmetriskt, utan vaggpartier 16 narmast cykloner som ligger nara namnda luftkanalledningsfortsattning 11 narmar sig progressivt namnda centrumaxel 14, medan vaggpartier 17 som utgar fran cyklonen mest avlagsen fran namnda fortsattning 11 stracker sig ratlinjigt under bildande av en oforanderlig vinkel (har ca 45°) med centrumaxeln 14. However, the present invention provides a solution to this problem, and a possible embodiment of a device for purifying air is schematically illustrated in Fig. 3. This device is provided with a channel element 12 arranged at the outlet 9 of the cyclone set 7 7 designed to define a channel portion 13 from the outlet as the air has to pass through and which is delimited by away from the outlet towards a center axis 14 thereof, which is directed in the air flow direction through the cyclones 8, converging rocks 15. The channel portion 13 is represented substantially rotationally symmetrically in relation to the center axis 14, and in the case shown in Fig. , although the channel portion there is not completely rotationally symmetrical, but cradle portions 16 closest to cyclones adjacent to said air duct continuation 11 progressively approach said center axis 14, while cradle portions 17 emanating from the cyclone most distant from said continuation 11 extend rectilinearly to form a non-linear angle (has approx. 45 °) with the center axis 14.
Foljaktligen uppvisar kanalpartiet 13 vasentligt formen av en stympad kon. De pa detta satt konvergerande vaggarna hos kanalpartiet 13 kommer att leda det luftflode som lamnar cyklo- 8 538 0 nerna 8 mot en nedstroms belagen Oppning 18 hos kanalpartiet, vilken genomtrangs vasentligen centralt av centrumaxeln 14. Harigenom kommer inte luftflodet att favoriseras igenom nagon av cyklonerna, utan vasentligen samma luftflode kommer att pas- 5 sera igenom var och en av cyklonerna, som darigenom kommer att uppvisa en verkningsgrad som är nara den under ideala forhallanden, d v s vad som yore fallet om luftkanalledningen skulle fortsatta rakt fram utan flagon krok efter cyklonuppsattningens 7 utlopp 9. Kanalelementet 12 uppvisar vidare en del 19 som an- sluter till kanalpartiet 13 vid dess oppning 18 for att i samverkan med partier 20 hos luftkanalledningen som dar definierar kroken bilda ett ledningsparti 21 med en tvarsnittsarea som vasentligen motsvarar den tvarsnittsarea som luftkanalledningen har i sin fortsattning 11 efter kroken. Consequently, the channel portion 13 substantially has the shape of a truncated cone. The thus converging rocks of the channel portion 13 will direct the air flow leaving the cyclones 8 towards a downstream coated opening 18 of the channel portion, which is penetrated substantially centrally by the center axis 14. As a result, the air flow will not be favored through any of the cyclones. , but essentially the same air flow will pass through each of the cyclones, which will thereby exhibit an efficiency which is close to that under ideal conditions, i.e. what would be the case if the air duct line were to continue straight ahead without flake hook after the cyclone set 7 outlet 9. The duct element 12 further has a part 19 which connects to the duct portion 13 at its opening 18 to form in conjunction with portions 20 of the air duct conduit defining the hook a conduit portion 21 having a cross-sectional area substantially corresponding to the cross-sectional area of the air duct duct. his continuation 11 after the hook.
Uppfinningen är givetvis inte pa nagot satt begransad till den ovan beskrivna utforingsformen, utan en mangd mojligheter till modifikationer darav torde vara uppenbara for en fackman pa omradet utan att denne for den skull avviker fran uppfinningens ram sadan denna definieras i bifogade patentkrav. The invention is of course not limited in any way to the embodiment described above, but a number of possibilities for modifications thereof should be obvious to a person skilled in the art without departing from the scope of the invention as defined in the appended claims.
Som redan tidigare namnts kan kanalpartiet ha skiftande konvergensgrad och langd i beroende av hur kroken ser ut. Avvikelser frail rotationssymmetrin kan aven vara anpassade till respektive forhallanden for att uppna namnda likformiga fordelning av luft- flodet Over cyklonuppsattningens tvarsnittsarea och darmed maximal sammanlagd verkningsgrad hos uppsattningens reningsfunktion. 9 As already mentioned, the channel portion can have varying degrees of convergence and length depending on what the hook looks like. Deviations from the rotational symmetry can also be adapted to the respective conditions in order to achieve the said uniform distribution of the air flow over the cross-sectional area of the cyclone set-up and thus the maximum total efficiency of the set-up cleaning function. 9
Claims (9)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1450701A SE538030C2 (en) | 2014-06-10 | 2014-06-10 | Device for air purification and air intake system provided with such device |
| EP15805838.8A EP3154704A4 (en) | 2014-06-10 | 2015-05-25 | Arrangement for the precleaning of air and an air intake system equipped with such an arrangement |
| PCT/SE2015/050595 WO2015190976A1 (en) | 2014-06-10 | 2015-05-25 | Arrangement for the precleaning of air and an air intake system equipped with such an arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1450701A SE538030C2 (en) | 2014-06-10 | 2014-06-10 | Device for air purification and air intake system provided with such device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1450701A1 SE1450701A1 (en) | 2015-12-11 |
| SE538030C2 true SE538030C2 (en) | 2016-02-16 |
Family
ID=54833942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1450701A SE538030C2 (en) | 2014-06-10 | 2014-06-10 | Device for air purification and air intake system provided with such device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3154704A4 (en) |
| SE (1) | SE538030C2 (en) |
| WO (1) | WO2015190976A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9745924B2 (en) * | 2015-05-29 | 2017-08-29 | Mann+Hummel Gmbh | Hood of a multi cyclone block of an air cleaner and air cleaner |
| CN106368859A (en) * | 2016-11-23 | 2017-02-01 | 平利县凯灵汽车零部件有限公司 | Special filter for automobile |
| JP7008479B2 (en) * | 2017-11-16 | 2022-01-25 | 株式会社マーレ フィルターシステムズ | Intake system swirl flow generator |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1619920B1 (en) * | 1967-09-27 | 1970-10-01 | Siemens Ag | Swirl device for pre-cleaning the raw gas flow of a three-phase vortex |
| US4159899A (en) * | 1977-08-26 | 1979-07-03 | Fram Corporation | Precleaner assembly |
| DE3523434A1 (en) * | 1985-06-29 | 1987-01-08 | Daimler Benz Ag | Air precleaning device for an intake line of internal combustion engines for the propulsion of a vehicle |
| ZA931264B (en) * | 1992-02-27 | 1993-09-17 | Atomic Energy South Africa | Filtration. |
| DE10235761B4 (en) * | 2002-08-05 | 2022-04-14 | Andreas Stihl Ag & Co. | suction device |
| DE10330296A1 (en) * | 2003-07-04 | 2005-02-03 | Mann + Hummel Gmbh | separating |
| US20080156301A1 (en) * | 2006-10-02 | 2008-07-03 | Stoneridge, Inc. | Dust Separation Device |
| KR20090064082A (en) * | 2007-12-14 | 2009-06-18 | 현대자동차주식회사 | Intake duct system for an engine |
-
2014
- 2014-06-10 SE SE1450701A patent/SE538030C2/en unknown
-
2015
- 2015-05-25 WO PCT/SE2015/050595 patent/WO2015190976A1/en active Application Filing
- 2015-05-25 EP EP15805838.8A patent/EP3154704A4/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| SE1450701A1 (en) | 2015-12-11 |
| WO2015190976A1 (en) | 2015-12-17 |
| EP3154704A4 (en) | 2017-11-29 |
| EP3154704A1 (en) | 2017-04-19 |
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