EP1244867B1 - Commutateur de flux - Google Patents

Commutateur de flux Download PDF

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Publication number
EP1244867B1
EP1244867B1 EP00985258A EP00985258A EP1244867B1 EP 1244867 B1 EP1244867 B1 EP 1244867B1 EP 00985258 A EP00985258 A EP 00985258A EP 00985258 A EP00985258 A EP 00985258A EP 1244867 B1 EP1244867 B1 EP 1244867B1
Authority
EP
European Patent Office
Prior art keywords
flow
switch according
flow switch
coanda
impinged
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00985258A
Other languages
German (de)
English (en)
Other versions
EP1244867A2 (fr
Inventor
Marek Birke
Gerhard Elfinger
Wolfgang Hahnl
Jürgen Klement
Andreas Mayr
Mark Olesen
Klaus Regenold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faurecia Emissions Control Technologies Germany GmbH
Original Assignee
ArvinMeritor Emissions Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ArvinMeritor Emissions Technologies GmbH filed Critical ArvinMeritor Emissions Technologies GmbH
Publication of EP1244867A2 publication Critical patent/EP1244867A2/fr
Application granted granted Critical
Publication of EP1244867B1 publication Critical patent/EP1244867B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/087—Other arrangements or adaptations of exhaust conduits having valves upstream of silencing apparatus for by-passing at least part of exhaust directly to atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C1/00—Circuit elements having no moving parts
    • F15C1/08—Boundary-layer devices, e.g. wall-attachment amplifiers coanda effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C3/00—Circuit elements having moving parts
    • F15C3/002—Circuit elements having moving parts using fluid droplets or similar deformable bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device

Definitions

  • the invention relates to a flow switch according to the Preamble of claim 1.
  • the Flow switch comprises thus an inflow channel, a Coanda tulip, at least two outlet channels and a displacement body.
  • the Displacer is in the field of Coanda tulip arranged.
  • the displacer has an inflow surface on, which is downstream of a jacket in the flow direction; According to the invention, the position is at least the inflow area changeable in the flow direction.
  • the inventively provided Lüver Siere the Flow surface of the displacer in the flow direction favors in conjunction with the other features of the switching element according to the invention the reproducibility of Switching point, i. she strongly supports that Switching element as precisely as possible at a certain, predetermined switching point of a first switching state switches a second switching state. This applies regardless of whether the flow switch as passive Switching element or as active, externally controlled Switching element (s.u.) Is executed.
  • a first preferred embodiment of the invention is characterized This is characterized by the fact that only the Anströmplatte with the Flow surface is variable in position, whereas the remaining components of the displacer stationary are arranged; This results in a special low construction costs. This construction is not absolutely; Rather, for example, together with the Anströmplatte also a part of the jacket of the displacer or the entire jacket in the flow direction be variable in position.
  • the inflow channel can be designed as a simple cylindrical tube to which the Coanda tulip immediately adjoins. However, it is particularly preferred as cylindrical Pipe with an additional conical extension followed by a preferably cylindrical channel section educated.
  • the Coanda tulip closes at this Embodiment of the invention advantageously to those cylindrical channel section on.
  • the jacket of the displacer is preferably in essentially cylindrical. At specific Switching tasks, however, the jacket can also special forms have, for example, by being conical or barrel-like is trained.
  • the displacer is preferred dimensioned and arranged so that the inflow surface inside the Coanda Tulip or in an upstream arranged for this cylindrical channel section is.
  • the jacket is preferably in the extension area the Coanda tulip; he extends in this case completely or partially within the Coanda tulip.
  • the Outlet passages are preferably arranged concentrically and provided with catching spaces in their flow cross-section larger than the actual outlet channels are formed.
  • the outer outlet channel closes expediently immediately to the Coanda tulip.
  • the displacement body is or at least partially formed as a hollow body.
  • a level Inflow area which in the flow direction is a cylindrical Pipe section is arranged downstream as a jacket.
  • the handling of the solution according to the invention can done two ways: either works the flow switch out of oneself, passively, autonomously, or the Switching is done externally by an active, manual and / or control engineering initiated arbitrarily.
  • the autonomous shift task is advantageous.
  • the location depends on the concrete process parameters and the flow guidance in the System off.
  • the by usually two axial position positions of the flat inflow surface inside the Coanda tulip and / or the inflow pipe is limited and by the additional described above Measures can be postponed.
  • the limits show up by unstable flow conditions, which are by a mutual turning of the flow in the represent one or the other switching direction. Outside These limits are not switched.
  • the fluid flows along the Coanda tulip radially outward. Except for Borders, the flow is axially aligned.
  • the Inflow channel flows the undivided exhaust gas flow to the Flow switch too.
  • a first switching position For example, if the inflow surface is in the plane, from the approach of the Coanda tulip to the cylindrical one Channel section is formed.
  • Downstream of the displacer creates a vortex zone extending from the wake to extends into the inner outlet channel and the inner Outlet channel closes fluidically.
  • a second switching position is the inflow surface upstream of the position of the first shift position, and although in the cylindrical channel section of the inflow channel.
  • the Flow forms immediately behind the outer edge of the Anströmplatte on the circumference of the lateral surface a separation vortices, but the current is forced to turn back on to apply the lateral surface of the displacer.
  • the Flow aligns axially and now dissolves in the outer Area from the Coanda tulip.
  • the flow is now from the Displacer guided so that they are also in the wake the displacement body applies and through the inner outlet channel is derived.
  • the outer outlet channel fluidically closes.
  • a first autonomous solution uses equilibrium between the force of acting on the inflow surface Dynamic pressure and one on the movable Anströmplatte acting spring, preferably inside the Displacer is arranged.
  • At low exhaust gas mass flow is for example the flat inflow surface in a first switching position within the cylindrical channel section.
  • the flow attaches to the lateral surface of the displacer and is due to the inventive shape of the displacement supplied to the internal outlet channel.
  • With rising Exhaust gas mass flow increases the back pressure on the inflow.
  • the inflow area shifts in the direction of flow against the restoring force of the spring until the second switching point at the base of the Coanda tulip is reached.
  • the current is no longer attached to the cylindrical outer surface of the displacer, but at the Coanda tulip and passes through the outer outlet channel.
  • Another switching area is located inside the Coanda tulip. He is through the second one described above Border marked.
  • the inflow is initially so arranged the flow along the Coanda tulip in the outer flow channel is derived.
  • Another autonomous solution uses thermal expansion solid, liquid or gaseous medium, the for example, in the interior of the displacer for Movement of the inflow surface are arranged.
  • thermal expansion solid, liquid or gaseous medium the for example, in the interior of the displacer for Movement of the inflow surface are arranged.
  • an externally controlled solution for example, a external pressure or vacuum sensor with the interior of the Displacer connected.
  • a possibly provided spring element and external pressure sensor can be the inflow depending on Position your wish. Also the shift of complete displacement is possible.
  • Autonomous solutions are especially for use in Semi-active mufflers of interest, if at one low exhaust gas mass flow a first flow path and at higher exhaust gas mass flow a second flow path or Both flow paths are to be preferred.
  • Figures 1 and 2 show that as a hybrid switching element executed flow switch, consisting of a Inflow channel 1 with conical extension 2 and cylindrical channel section 3, to which the Coanda tulip 5 and an outer outlet channel 11 with trap 13th connect.
  • the inner outlet channel 12 with trap 14th is located downstream of the displacer 6.
  • the displacement body 6 has a front side on a Anströmplatte 25 arranged flat inflow 7 with outer edge 15, a cylindrical shell 8, a Caster 9 and designed as a spring actuator 10, which is supported inside the displacer 6, on.
  • the Anströmplatte 25 is in the flow direction slidably guided, by means of the central Guide rod 26.
  • the inflow channel 1 comprises a conical Extension 2 and another cylindrical channel section Third
  • the flat inflow surface 7 is in Area of the approach 4 of Coanda tulip 5 to the cylindrical channel section 3.
  • Figure 2 is the plane Inflow surface 7 due to the on the inflow acting low dynamic pressure, the one from FIG. 1 reduced mass flow results, contrary to Flow direction in the cylindrical channel section. 3 moved into it.
  • the switching task therein at low mass flow rate, the exhaust gas to pass through an inner outlet channel 12.
  • the exhaust gas at large Mass flow should be the exhaust gas through the ring cross-section between outer outlet channel 11 and inner outlet channel 12th be derived.
  • the spring as adjusting device 10 is located in the Initial situation with low exhaust gas mass flow 20 in a defined bias state.
  • the flat inflow surface 7 is in the cylindrical channel section 3rd positioned.
  • the exhaust gas mass flow 20 is divided at the plane leading surface 7, triggers at the outer edge 15, forms a small detachment vertebra 16, but allows that the fluid again to the cylindrical surface 8th of the displacer 6 applies.
  • On the inner surface of the Coanda tulip 5 triggers the exhaust gas mass flow 20 and forms a rotating vortex area 17, which is the flow stabilized and the inner trap 14 and the inner Outlet channel 12 leads.
  • Increases with increasing mass flow the dynamic pressure on the flat inflow surface 7.
  • the plane Run-on surface 7 shifts axially in the flow direction.
  • the flat inflow surface 7 is in Range of approach 4 of the Coanda tulip 5.
  • the shape of the Flow changes and now forms according to FIG.
  • the exhaust gas mass flow 20 no longer settles on the lateral surface 8 of the displacer 6 at. It is behind the caster 9 a large vortex area 18, which of the Edge 15 extends to the inner catching space 14 and the internal outlet channel 12 fluidically closes.
  • the exhaust gas mass flow sets 20 at the Coanda Tulip 5 forms one stable ring flow 19, which over the outer trap 13th and the outer outlet channel 11 is derived.
  • Figure 3 is instead of the spring element 10, a bellows compensator 22nd arranged between the inflow surface 7 and lateral surface 8.
  • a bellows compensator 22nd arranged between the inflow surface 7 and lateral surface 8.
  • the complete displacement body 6 forms a closed Hollow body, which is filled with a fluid.
  • the thermal expansion of the trapped fluid adds Temperature increase to shift the flat inflow surface 7.
  • the size of the Back pressure on the inflow surface 7 and the spring stiffness of the corrugated pipe 22 can be so more autonomous Create switching combinations.
  • Anström Formation 7 can be so pneumatic or hydraulic by increasing or decreasing the internal pressure change.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Claims (22)

  1. Commutateur de flux comportant un canal d'amenée (1), une tulipe Coanda (5), au moins deux canaux de sortie (11 et 12) et un corps déplaceur (6) qui est agencé dans la région de la tulipe Coanda (5) et présente une surface (7) touchée par le flux et une enveloppe (8),
       caractérisé en ce    que la position de la surface (7) touchée par le flux est modifiable dans la direction d'écoulement.
  2. Commutateur de flux selon la revendication 1,
       caractérisé en ce    que la surface (7) touchée par le flux est reliée à un dispositif de réglage (10).
  3. Commutateur de flux selon la revendication 2,
       caractérisé en ce    que le dispositif de réglage (10) est réalisé sous forme d'élément ressort ou d'élément de dilation thermique.
  4. Commutateur de flux selon l'une des revendications 1 à 3,
       caractérisé en ce    qu'un compensateur (22) à tube ondulé est agencé entre la surface (7) touchée par le flux et l'enveloppe (8), de manière à ce que le corps déplaceur (6) forme un corps creux, fermé et étanche qui est rempli d'un fluide (24).
  5. Commutateur de flux selon la revendication 4,
       caractérisé en ce    que le corps déplaceur (6) fermé et étanche est relié, par l'intermédiaire d'un conduit de raccordement (21), à un organe de réglage (23) qui est actionné à l'aide de fluides de pression.
  6. Commutateur de flux selon l'une des revendications 1 à 5,
       caractérisé en ce    que le corps déplaceur (6) est monté mobile.
  7. Commutateur de flux selon l'une des revendications 1 à 6,
       caractérisé en ce    que les canaux de sortie (11, 12) sont agencés de manière concentrique l'un par rapport à l'autre, dont chacun est pourvu d'un espace collecteur (13, 14) conique ou cylindrique.
  8. Commutateur de flux selon la revendication 7,
       caractérisé en ce    que l'espace collecteur (13) extérieur est contigu à la tulipe Coanda (5) avec un décalage radial vers l'extérieur.
  9. Commutateur de flux selon la revendication 7 ou 8,
       caractérisé en ce    que le canal de sortie (12) intérieur est agencé à une distance en aval derrière le corps déplaceur (6).
  10. Commutateur de flux selon l'une des revendications 1 à 9,
       caractérisé en ce    que le corps déplaceur (6) présente à l'extrémité dirigée en aval une portion de queue (9) en forme de boule ou plane.
  11. Commutateur de flux selon l'une des revendications 1 à 10,
       caractérisé en ce    que l'enveloppe (8) du corps déplaceur (6) est réalisée de manière sensiblement cylindrique et est agencée de préférence dans la partie d'extension de la tulipe Coanda (5).
  12. Commutateur de flux selon l'une des revendications 1 à 11,
       caractérisé en ce    que le corps déplaceur (6) est réalisé sous forme de corps creux.
  13. Commutateur de flux selon l'une des revendications 1 à 12,
       caractérisé en ce    que la surface (7) touchée par le flux du corps déplaceur (6) est réalisée de manière sensiblement plane et est agencée de préférence à l'intérieur de la tulipe Coanda (5).
  14. Commutateur de flux selon l'une des revendications 1 à 13,
       caractérisé en ce    que le bord extérieur de la surface (7) touchée par le flux est supérieur, inférieur ou égal au diamètre extérieur de l'enveloppe (8).
  15. Commutateur de flux selon l'une des revendications 1 à 14,
       caractérisé en ce    que l'enveloppe (8) est réalisée en forme de cône, de fût ou de manière ondulée.
  16. Commutateur de flux selon l'une des revendications 1 à 15,
       caractérisé en ce    que la surface (7) touchée par le flux du corps déplaceur (6) est réalisée de manière plane, concave ou convexe.
  17. Commutateur de flux selon l'une des revendications 1 à 16,
       caractérisé en ce    que la surface (7) touchée par le flux est agencée dans la région du point d'embase (4) de la tulipe Coanda (5) sur le canal d'amenée (1) ou dans la partie cylindrique (3) de canal du canal d'amenée (1) ou à l'intérieur de la tulipe Coanda (5).
  18. Commutateur de flux selon l'une des revendications 1 à 17,
       caractérisé en ce    que le bord extérieur de la surface (7) touchée par le flux est réalisé de manière brisée, arrondie, avec des angles vifs, avec des ruptures ou est pourvu d'une cloison de décrochage ou de bossages et/ou de renfoncements irréguliers.
  19. Commutateur de flux selon l'une des revendications 1 à 18,
       caractérisé en ce    que des orifices sont réalisés dans la surface (7) touchée par le flux et/ou dans l'enveloppe (8), les orifices reliant l'espace intérieur du corps déplaceur (6) au courant principal.
  20. Commutateur de flux selon la revendication 19,
       caractérisé en ce    que les orifices dans le corps déplaceur (6) ou dans la tulipe Coanda (5) sont reliés à un autre niveau de pression du fluide par l'intermédiaire de conduits de raccordement.
  21. Commutateur de flux selon la revendication 20,
       caractérisé en ce    que le niveau de pression additionnel est soit une partie du guidage de canal lui-même en amont ou en aval, soit un réservoir de surpression ou de dépression.
  22. Commutateur de flux selon l'une des revendications 1 à 21,
       caractérisé en ce    que le système comprenant la tulipe Coanda (5), le corps déplaceur (6), le canal d'amenée (1) et les canaux de sortie (11, 12) n'est pas réalisé de manière concentrique.
EP00985258A 2000-01-07 2000-12-23 Commutateur de flux Expired - Lifetime EP1244867B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10000464 2000-01-07
DE10000464A DE10000464B4 (de) 2000-01-07 2000-01-07 Fluidisches Schaltelement
PCT/EP2000/013261 WO2001051777A2 (fr) 2000-01-07 2000-12-23 Commutateur de flux

Publications (2)

Publication Number Publication Date
EP1244867A2 EP1244867A2 (fr) 2002-10-02
EP1244867B1 true EP1244867B1 (fr) 2005-03-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00985258A Expired - Lifetime EP1244867B1 (fr) 2000-01-07 2000-12-23 Commutateur de flux

Country Status (3)

Country Link
EP (1) EP1244867B1 (fr)
DE (2) DE10000464B4 (fr)
WO (1) WO2001051777A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ306551B6 (cs) * 2012-05-25 2017-03-08 Ăšstav termomechaniky AV ÄŚR , v.v.i. Způsob dvourežimového řízení průtoku tekutin a zařízení pro provádění tohoto způsobu

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Also Published As

Publication number Publication date
EP1244867A2 (fr) 2002-10-02
DE10000464B4 (de) 2004-02-05
WO2001051777A2 (fr) 2001-07-19
DE50009679D1 (de) 2005-04-07
DE10000464A1 (de) 2001-07-26
WO2001051777A3 (fr) 2001-12-20

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