EP3728860B1 - Side channel blower, in particular secondary air blower for an internal combustion engine - Google Patents

Side channel blower, in particular secondary air blower for an internal combustion engine Download PDF

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Publication number
EP3728860B1
EP3728860B1 EP18716283.9A EP18716283A EP3728860B1 EP 3728860 B1 EP3728860 B1 EP 3728860B1 EP 18716283 A EP18716283 A EP 18716283A EP 3728860 B1 EP3728860 B1 EP 3728860B1
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EP
European Patent Office
Prior art keywords
channel
outlet
blower
conveyor
housing
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EP18716283.9A
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German (de)
French (fr)
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EP3728860A1 (en
Inventor
Alexander Gotter
Thomas Rösgen
Petra DEITER
Alpay CAPAN
Krischan VON DER BEEK
Matthias Boutros-Mikhail
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Pierburg GmbH
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Pierburg GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/083—Sealings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D23/00—Other rotary non-positive-displacement pumps
    • F04D23/008—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings

Definitions

  • the invention relates to a side channel blower, in particular a secondary air blower for an internal combustion engine with a multi-part housing that has at least a first housing part, which is designed as a pot part and a second housing part, which is designed as a cover part, the pot part and the cover part in a parting plane below Interposition of a sealing member are connected to one another and enclose a fan chamber, an inlet, which opens via an inlet area into at least one essentially annularly extending conveying channel with a radially delimiting wall, and an outlet, an impeller, which can be driven via a drive unit is rotatably mounted in the housing and has conveyor blades which interact with the opposite conveyor channel, and an interruption area between the inlet and the outlet in which the at least one conveyor channel is interrupted in the circumferential direction, wherein the outlet has an outlet channel section into which the at least one conveying channel opens, the outlet channel section having an outwardly directed discharge opening and an outlet opening directed towards the conveying channel with a first and a second side
  • Side-channel fans are known in which only one delivery channel is formed on one axial side of the impeller in a housing part, as well as side-channel fans in which a delivery channel is formed on both axial sides of the impeller, with both delivery channels then being fluidically connected to one another.
  • one of the delivery channels is formed in a housing part serving as a cover, while the other delivery channel is formed in the housing part to which the drive unit is usually attached, on whose shaft the impeller is at least rotationally fixed.
  • the DE 10 2009 006 652 proposed a pump for pumping fluids to design the outlet opening of the outlet in a special way. It has been found, however, that despite the reduction in pressure surges and the associated reduction in noise emissions, the efficiency is still too low. It would also be desirable to increase the maximum possible throughput.
  • the publications show WO 2012/041625 A1 and DE 10 2015 213 549 A1 Side channel blowers in which the first and second side edges span a first plane E 1 , which forms an angle ⁇ ⁇ 30 ° with a second plane E 2 , which is spanned by the discharge opening. As a result, a real tangential flow can be achieved in the transition area from the delivery channel to the outlet channel section of the outlet, whereby an improvement in efficiency is possible and higher operating pressures can be achieved.
  • the object is therefore to create a side channel blower with which the above-mentioned disadvantages can be avoided in a simple and inexpensive manner.
  • the outlet channel section can be made larger on average, which in turn enables an increase in throughput. As a result, the above-mentioned effects can be better exploited and even intensified due to the angle ⁇ .
  • the parting plane can advantageously run in a stepped manner and the sealing element can be designed as a liquid seal in a groove. This ensures that no sealing material gets into the fan compartment.
  • a side channel blower is thus created in which the efficiency and the maximum achievable throughput can be increased significantly compared to known side channel blowers.
  • the side channel blower shown consists of a two-part housing 2 and an impeller 4 rotatably mounted in the housing 2 and driven by a drive unit 3, for example for conveying air.
  • the air reaches an inlet area 8 via an axial inlet 6 (see FIG Figure 2 ) a first housing part 10, which in the present embodiment serves as a pot part of the side channel blower.
  • a first housing part 10 which in the present embodiment serves as a pot part of the side channel blower.
  • the air then flows into two essentially annularly extending conveyor channels 12, 14, of which the first conveyor channel 12 is formed in the cover part 10 and the second conveyor channel 14 in a second housing part 16, which in the present embodiment is a cover part of the side channel blower serves, is formed.
  • the pot part 10 and the cover part 16 thus enclose a blower space 17.
  • the cover part 16 has a central opening 15 in which a bearing 18 of a drive shaft 19 of the drive unit 3 is also arranged, on which the impeller 4 is attached.
  • the air is discharged via a tangential outlet 20 which is arranged on the first housing part 10.
  • the impeller 4 is arranged between the pot part 10 and the cover part 16 and has conveyor blades 22 on its circumference, which are curved and extend radially, the conveyor blades 22 by a radially extending circumferential ring 24 in a first row axially opposite the first conveyor channel 12 and a second row are divided axially opposite to the second delivery channel 14, so that two vortex channels are formed, each of which is formed by one of the delivery channels 12, 14 with the facing part of the impeller 4.
  • the outer diameter of the conveyor channels 12, 14 is slightly larger than the outer diameter of the impeller 4, so that there is a fluidic connection between the two conveyor channels 12, 14 outside the outer circumference of the impeller 4, so that an exchange of air between the two conveyor channels 12, 14 can take place. Between the conveyor blades 22 extending from the circumferential ring 24, pockets 26 which are open radially outward are thus formed in which the air is conveyed or accelerated so that its pressure is increased over the length of the conveyor channels 12, 14.
  • the axial inlet 6 is as far away as possible from the tangential outlet 20 in the direction of rotation of the impeller 4.
  • known interruption areas 28 are provided on the pot part 10 and on the cover part 16 between the inlet 6 and the outlet 20.
  • FIG. 2 only the interruption area 28 in the pot part 10 is shown.
  • Another interruption area 32 is formed on a radially delimiting wall 33 of the first housing part 10 and interrupts a radially outer connection area 35 between the two conveying channels 12, 14.
  • the pot part 10 is fastened to the second cover part 16 by means of screws (not shown further) which are inserted through corresponding bores 34 on the radially outwardly extending projections 36 on the pot part 10 are formed.
  • the cover part 16 is in turn connected in a known manner to a housing part 38 of the drive unit 3.
  • a groove 42 is formed radially behind a wall 40 of the conveyor channel 16 at the level of a bottom surface of the conveyor channel 14.
  • a parting plane 46 of the pot part 10 and the cover part 16 extends in this way in a stepped manner.
  • a liquid seal 48 can be provided in the groove 42 for sealing between the pot part 10 and the cover part 16, since the liquid seal 48 has no direct connection to the blower chamber 17.
  • the pot part 10 Radially in front of a wall 50 of the conveying channel 12 is an annular web 52 which, after the fan has been assembled, engages in a corresponding groove 54 of the impeller 4, thereby sealing the conveying channel 12 in the direction of the interior of the impeller 4.
  • the pot part 10 has a cylindrical recess 56 into which the drive shaft 19 of the drive unit 3 protrudes.
  • the outlet 20 has a tangential outlet channel section 58 which, directed outwards, opens into an outlet opening 60.
  • the delivery channels 12, 14 are fluidically connected to the outlet channel section 58 via an outlet opening 62.
  • a first and a second side edge 64, 66 span a first plane E 1 which, with a second plane E 2 , which is spanned by the discharge opening 60, forms an angle ⁇ ⁇ 30 °, here approx. 57 ° , includes (see in particular Figure 3 ).
  • the outlet opening 62 extends far into the radially delimiting wall 33 and a “real” tangential outflow can thereby be realized with a high degree of efficiency.
  • at least the pot part 10 can be produced from a thermosetting plastic as a workpiece off the tool.
  • the side channel blower described in the exemplary embodiment can be a pump with only one side channel, or the outlet opening and interrupter shape can both carry the larger flow with respect to the one be designed to correspond to the inlet-facing channel and to the opposite channel.

Description

Die Erfindung betrifft ein Seitenkanalgebläse, insbesondere Sekundärluftgebläse für eine Verbrennungskraftmaschine mit einem mehrteiligen Gehäuse, dass zumindest ein erstes Gehäuseteil, das als Topfteil ausgeführt ist und ein zweites Gehäuseteil, das als Deckelteil ausgeführt ist, aufweist, wobei das Topfteil und das Deckelteil in einer Trennebene unter Zwischenschaltung eines Dichtorgans miteinander verbunden sind und einen Gebläseraum einschließen, wobei ein Einlass, der über einen Einlassbereich in einen zumindest einen sich im Wesentlichen ringförmig erstreckenden Förderkanal mit einer radial begrenzenden Wand mündet, und ein Auslass ausgebildet sind, einem Laufrad, welches über eine Antriebseinheit antreibbar ist, drehbar im Gehäuse gelagert ist und Förderschaufeln aufweist, die mit dem gegenüberliegenden Förderkanal zusammenwirken, und einem Unterbrechungsbereich zwischen dem Einlass und dem Auslass, in dem der zumindest eine Förderkanal in Umfangsrichtung unterbrochen ist, wobei der Auslass einen Auslasskanalabschnitt aufweist, in den der zumindest eine Förderkanal mündet, wobei der Auslasskanalabschnitt eine nach außen gerichtete Ausstoßöffnung aufweist und eine zum Förderkanal gerichtete Auslassöffnung mit einer ersten und einer zweiten Seitenkante aufweist, wobei die erste Seitenkante Teil des Unterbrechungsbereiches und die zweite Seitenkante Teil der radial begrenzenden Wand ist wobei die erste und die zweite Seitenkante eine erste Ebene aufspannen, die mit einer zweiten Ebene, die durch die Ausstoßöffnung aufgespannt ist, einen Winkel α ≥ 30° einschließt, derart, dass die Auslassöffnung in die radial begrenzende Wand hineinreicht.The invention relates to a side channel blower, in particular a secondary air blower for an internal combustion engine with a multi-part housing that has at least a first housing part, which is designed as a pot part and a second housing part, which is designed as a cover part, the pot part and the cover part in a parting plane below Interposition of a sealing member are connected to one another and enclose a fan chamber, an inlet, which opens via an inlet area into at least one essentially annularly extending conveying channel with a radially delimiting wall, and an outlet, an impeller, which can be driven via a drive unit is rotatably mounted in the housing and has conveyor blades which interact with the opposite conveyor channel, and an interruption area between the inlet and the outlet in which the at least one conveyor channel is interrupted in the circumferential direction, wherein the outlet has an outlet channel section into which the at least one conveying channel opens, the outlet channel section having an outwardly directed discharge opening and an outlet opening directed towards the conveying channel with a first and a second side edge, the first side edge being part of the interruption area and the second side edge being part the radially delimiting wall is the first and the second side edge spanning a first plane which forms an angle α ≥ 30 ° with a second plane that is spanned by the discharge opening, such that the outlet opening extends into the radially delimiting wall.

seitenkanalgebläse oder -pumpen sind allgemein bekannt und werden in einer Vielzahl von Anmeldungen beschrieben. Im Kraftfahrzeug dienen sie beispielsweise zur Förderung von Kraftstoff oder zum Einblasen von Sekundärluft in das Abgassystem. Der Antrieb erfolgt üblicherweise über einen Elektromotor, der das Laufrad antreibt. Das Laufrad ist an seinem Umfang im Wesentlichen derart ausgebildet, dass es mit dem ihm axial gegenüberliegenden Förderkanal einen umlaufenden Wirbelkanal bildet. Aus dem den Wirbelkanal bildenden Teil des Laufrads ragen Förderschaufeln senkrecht in Richtung zum gegenüberliegenden, im Gehäuse ausgebildeten Teil des Förderkanals, so dass zwischen den Förderschaufeln Taschen gebildet werden. Das geförderte Fluid in den Taschen erfährt bei Drehung des Laufrades durch die Förderschaufeln eine Beschleunigung in Umfangsrichtung sowie in radialer Richtung, so dass im Förderkanal eine umlaufende Wirbelströmung entsteht.Side channel blowers or pumps are well known and are described in a large number of applications. In the motor vehicle, for example, they are used to deliver fuel or to blow secondary air into the exhaust system. It is usually driven by an electric motor that drives the impeller. The impeller is essentially of this type on its periphery designed so that it forms a circumferential vortex channel with the delivery channel axially opposite it. From the part of the impeller that forms the vortex channel, conveyor blades protrude perpendicularly in the direction of the opposite part of the conveyor channel formed in the housing, so that pockets are formed between the conveyor blades. When the impeller rotates, the conveyed fluid in the pockets is accelerated in the circumferential direction and in the radial direction by the conveying blades, so that a circulating vortex flow is created in the conveying channel.

Es sind Seitenkanalgebläse bekannt, bei denen lediglich ein Förderkanal an einer axialen Seite des Laufrades in einem Gehäuseteil ausgebildet ist, als auch Seitenkanalgebläse, bei denen an beiden axialen Seiten des Laufrades ein Förderkanal ausgebildet ist, wobei dann beide Förderkanäle fluidisch miteinander verbunden sind. Bei einem derartigen Seitenkanalgebläse ist einer der Förderkanäle in einem als Deckel dienenden Gehäuseteil ausgebildet, während der andere Förderkanal in dem Gehäuseteil ausgebildet ist, an dem üblicherweise die Antriebseinheit befestigt ist, an deren Welle das Laufrad zumindest drehfest angeordnet ist.Side-channel fans are known in which only one delivery channel is formed on one axial side of the impeller in a housing part, as well as side-channel fans in which a delivery channel is formed on both axial sides of the impeller, with both delivery channels then being fluidically connected to one another. In such a side channel blower, one of the delivery channels is formed in a housing part serving as a cover, while the other delivery channel is formed in the housing part to which the drive unit is usually attached, on whose shaft the impeller is at least rotationally fixed.

Um eine möglichst gute Förderung beziehungsweise Druckerhöhung zu erhalten, ist es notwendig, einen möglichst großen Teil des Umfangs des Förderkanals zu nutzen. Aus diesem Grund müssen Einlass und Auslass über den Umfang in Laufrichtung des Laufrades möglichst weit auseinander liegen, wobei eine Kurzschlussströmung zwischen dem Einlass und dem Auslass durch einen Unterbrechungsbereich zu verhindern ist. Als problematisch bei derartigen Seitenkanalgebläsen hat sich die hohe Geräuschentwicklung herausgestellt, welche insbesondere durch Pulsationen entsteht, die durch plötzliche Druckstöße der geförderten Luft auftreten.In order to obtain the best possible delivery or pressure increase, it is necessary to use the largest possible part of the circumference of the delivery channel. For this reason, the inlet and outlet must be as far apart as possible over the circumference in the running direction of the impeller, with a short-circuit flow between the inlet and the outlet being prevented by an interruption area. A problem with such side channel blowers has been found to be the high level of noise generated, in particular, as a result of pulsations that occur as a result of sudden pressure surges in the conveyed air.

Diese Druckstöße treten unter anderem unmittelbar nach dem Überstreichen jeder Förderschaufel am Anfang des Unterbrechungsbereiches auf, da in den Taschen zwischen den Förderschaufeln noch verdichtete Luft vorhanden ist, die nicht vollständig über den Auslass ausgestoßen wurde, welche bei Erreichen des Unterbrechungsbereiches plötzlich gegen dessen Wände beschleunigt werden. Dies führt zu deutlich erhöhten Geräuschemissionen.These pressure surges occur, among other things, immediately after each conveyor shovel is passed over at the beginning of the interruption area, as there is still compressed air in the pockets between the conveyor blades that was not completely expelled via the outlet, which is suddenly accelerated against its walls when the interruption area is reached . This leads to significantly increased noise emissions.

Um dies zu vermeiden, wird in der DE 10 2009 006 652 eine Pumpe zur Förderung von Fluiden vorgeschlagen, die Auslassöffnung des Auslasses in besonderer Weise zu gestalten. Es hat sich jedoch herausgestellt, dass trotz der Verringerung der Druckstöße und damit verbunden einer Verringerung der Geräuschemissionen ein immer noch zu geringer Wirkungsgrad vorliegt. Auch wäre es wünschenswert den maximal möglichen Durchsatz zu erhöhen. Darüberhinaus zeigen die Druckschriften WO 2012/041625 A1 und DE 10 2015 213 549 A1 Seitenkanalgebläse, bei denen die erste und die zweite Seitenkante eine erste Ebene E1 aufspannen, die mit einer zweiten Ebene E2, die durch die Ausstoßöffnung aufgespannt ist, einen Winkel α ≥ 30° einschließt. Hierdurch kann eine echte tangentiale Strömung im Übergangsbereich vom Förderkanal zum Auslasskanalabschnitt des Auslasses erreicht werden, wodurch eine Wirkungsgradverbesserung möglich ist und höhere Betriebsdrücke erreicht werden können.To avoid this, the DE 10 2009 006 652 proposed a pump for pumping fluids to design the outlet opening of the outlet in a special way. It has been found, however, that despite the reduction in pressure surges and the associated reduction in noise emissions, the efficiency is still too low. It would also be desirable to increase the maximum possible throughput. In addition, the publications show WO 2012/041625 A1 and DE 10 2015 213 549 A1 Side channel blowers in which the first and second side edges span a first plane E 1 , which forms an angle α ≥ 30 ° with a second plane E 2 , which is spanned by the discharge opening. As a result, a real tangential flow can be achieved in the transition area from the delivery channel to the outlet channel section of the outlet, whereby an improvement in efficiency is possible and higher operating pressures can be achieved.

Es stellt sich daher die Aufgabe, ein Seitenkanalgebläse zu schaffen, mit dem die obengenannten Nachteile auf einfache und kostengünstige Weise vermieden werden können.The object is therefore to create a side channel blower with which the above-mentioned disadvantages can be avoided in a simple and inexpensive manner.

Diese Aufgabe wird durch den kennzeichnenden Teil des Hauptanspruchs gelöst. Im radial innen liegenden Bereich des Laufrades strömt das Fluid zwischen die Laufschaufeln und verlässt die Taschen zwischen den Förderschaufeln im radial außen liegenden Bereich.This problem is solved by the characterizing part of the main claim. In the radially inner area of the impeller, the fluid flows between the rotor blades and leaves the pockets between the conveyor blades in the radially outer area.

Dadurch, dass die Trennebene in Höhe oder unterhalb einer Bodenfläche des Förderkanals im Deckelteil, kann der Auslasskanalabschnitt im Durchschnitt größer gestaltet werden kann, wodurch wiederum eine Erhöhung des Durchsatzes ermöglicht wird. Hierdurch können die obengenannten Effekte aufgrund des Winkels α besser ausgenutzt und sogar noch verstärkt werden.Because the parting plane is at or below a bottom surface of the conveying channel in the cover part, the outlet channel section can be made larger on average, which in turn enables an increase in throughput. As a result, the above-mentioned effects can be better exploited and even intensified due to the angle α.

In vorteilhafter Weise kann die Trennebene stufenförmig verlaufen und in einer Nut das Dichtorgan als Flüssigkeitsdichtung ausgebildet sein. Auf diese Weise ist gewährleistet, dass kein Dichtungsmaterial in den Gebläseraum gelangt.The parting plane can advantageously run in a stepped manner and the sealing element can be designed as a liquid seal in a groove. This ensures that no sealing material gets into the fan compartment.

Eine besonders einfach herzustellende Anordnung ergibt sich dadurch, dass das Deckelteil sich an die Antriebseinheit anschließt. Hierbei ist im Deckelteil eine Öffnung für eine Lagerung einer Antriebswelle vorzusehen. Das Topfteil schließt dann das Seitenkanalgebläse nach außen ab.An arrangement that is particularly simple to produce results from the fact that the cover part adjoins the drive unit. In this case, an opening for mounting a drive shaft is to be provided in the cover part. The pot part then closes the side channel blower from the outside.

Es wird somit ein Seitenkanalgebläse geschaffen, bei dem im Vergleich zu bekannten Seitenkanalgebläsen der Wirkungsgrad und der maximal erreichbare Durchsatz wesentlich erhöht werden können.A side channel blower is thus created in which the efficiency and the maximum achievable throughput can be increased significantly compared to known side channel blowers.

Ein Ausführungsbeispiel eines erfindungsgemäßen Seitenkanalgebläses ist in den Zeichnungen dargestellt und wird nachfolgend beschrieben.

  • Figur 1 zeigt eine Seitenansicht eines Seitenkanalgebläses in geschnittener Darstellung.
  • Figur 2 zeigt eine perspektivische Darstellung eines Topfteils der Seitenkanalpumpe der Figur 1.
  • Figur 3 zeigt eine Draufsicht des Topfteils der Seitenkanalpumpe der Figur 1.
An embodiment of a side channel blower according to the invention is shown in the drawings and is described below.
  • Figure 1 shows a side view of a side channel blower in a sectioned illustration.
  • Figure 2 FIG. 11 shows a perspective view of a pot part of the side channel pump of FIG Figure 1 .
  • Figure 3 FIG. 11 shows a top view of the pot part of the side channel pump of FIG Figure 1 .

Das in Figur 1 dargestellte Seitenkanalgebläse besteht aus einem zweiteiligen Gehäuse 2 sowie einem im Gehäuse 2 drehbar gelagerten und über eine Antriebseinheit 3 angetriebenen Laufrad 4, beispielsweise zur Förderung von Luft. Die Luft gelangt über einen axialen Einlass 6 in einen Einlassbereich 8 (siehe hierzu Figur 2) eines ersten Gehäuseteils 10, welches in vorliegender Ausführung als Topfteil des Seitenkanalgebläses dient. Vom Einlassbereich 8 aus strömt die Luft anschließend in zwei sich im Wesentlichen ringförmig erstreckende Förderkanäle 12, 14, von denen der erste Förderkanal 12 im Deckelteil 10 ausgebildet ist und der zweite Förderkanal 14 in einem zweiten Gehäuseteil 16, welches in vorliegender Ausführung als Deckelteilteil des Seitenkanalgebläses dient, ausgebildet ist. Das Topfteil 10 und das Deckelteil 16 schließen somit einen Gebläseraum 17 ein.This in Figure 1 The side channel blower shown consists of a two-part housing 2 and an impeller 4 rotatably mounted in the housing 2 and driven by a drive unit 3, for example for conveying air. The air reaches an inlet area 8 via an axial inlet 6 (see FIG Figure 2 ) a first housing part 10, which in the present embodiment serves as a pot part of the side channel blower. From the inlet area 8, the air then flows into two essentially annularly extending conveyor channels 12, 14, of which the first conveyor channel 12 is formed in the cover part 10 and the second conveyor channel 14 in a second housing part 16, which in the present embodiment is a cover part of the side channel blower serves, is formed. The pot part 10 and the cover part 16 thus enclose a blower space 17.

Das Deckelteil 16 besitzt eine zentrale Öffnung 15, in der auch eine Lagerung 18 einer Antriebswelle 19 der Antriebseinheit 3 angeordnet ist, auf der das Laufrad 4 befestigt ist. Der Austritt der Luft erfolgt über einen tangentialen Auslass 20, der am ersten Gehäuseteil 10 angeordnet ist.The cover part 16 has a central opening 15 in which a bearing 18 of a drive shaft 19 of the drive unit 3 is also arranged, on which the impeller 4 is attached. The air is discharged via a tangential outlet 20 which is arranged on the first housing part 10.

Das Laufrad 4 ist zwischen dem Topfteil 10 und dem Deckelteil 16 angeordnet und weist an seinem Umfang Förderschaufeln 22 auf, die gekrümmt sind und sich radial erstrecken, wobei die Förderschaufeln 22 durch einen sich radial erstreckenden Umfangsring 24 in eine erste Reihe axial gegenüberliegend zum ersten Förderkanal 12 und eine zweite Reihe axial gegenüberliegend zum zweiten Förderkanal 14 geteilt werden, so dass zwei Wirbelkanäle ausgebildet werden, die jeweils durch einen der Förderkanäle 12, 14 mit dem zugewandten Teil des Laufrades 4 gebildet werden. Der Außendurchmesser der Förderkanäle 12, 14 ist etwas größer als der Außendurchmesser des Laufrades 4, so dass eine fluidische Verbindung zwischen den beiden Förderkanälen 12, 14 außerhalb des Außenumfangs des Laufrads 4 besteht, so dass ein Austausch von Luft zwischen den beiden Förderkanälen 12, 14 stattfinden kann. Zwischen den sich vom Umfangsring 24 erstreckenden Förderschaufeln 22 werden somit nach radial außen offene Taschen 26 gebildet, in denen die Luft gefördert beziehungsweise beschleunigt wird, so dass deren Druck über die Länge der Förderkanäle 12, 14 erhöht wird.The impeller 4 is arranged between the pot part 10 and the cover part 16 and has conveyor blades 22 on its circumference, which are curved and extend radially, the conveyor blades 22 by a radially extending circumferential ring 24 in a first row axially opposite the first conveyor channel 12 and a second row are divided axially opposite to the second delivery channel 14, so that two vortex channels are formed, each of which is formed by one of the delivery channels 12, 14 with the facing part of the impeller 4. The outer diameter of the conveyor channels 12, 14 is slightly larger than the outer diameter of the impeller 4, so that there is a fluidic connection between the two conveyor channels 12, 14 outside the outer circumference of the impeller 4, so that an exchange of air between the two conveyor channels 12, 14 can take place. Between the conveyor blades 22 extending from the circumferential ring 24, pockets 26 which are open radially outward are thus formed in which the air is conveyed or accelerated so that its pressure is increased over the length of the conveyor channels 12, 14.

Um eine möglichst gute Förderleistung und Druckerhöhung zu erlangen, ist der axiale Einlass 6 in Drehrichtung des Laufrades 4 möglichst weit vom tangentialen Auslass 20 entfernt. Um zuverlässig eine Kurzschlussströmung entgegen der Drehrichtung des Laufrades 4 vom Einlass 6 zum Auslass 20 zu unterbinden, sind zwischen dem Einlass 6 und dem Auslass 20 auf bekannte Unterbrechungsbereiche 28 am Topfteil 10 und am Deckelteil 16 vorgesehen. In der Zeichnung ist in Figur 2 jedoch nur der Unterbrechungsbereich 28 im Topfteil 10 dargestellt. In den Unterbrechungsbereichen 28 ist folglich axial gegenüberliegend zu den Förderschaufeln 22 des Laufrades 4 ein möglichst geringer Spalt vorhanden. Ein weiterer Unterbrechungsbereich 32 ist an einer radial begrenzenden Wand 33 des ersten Gehäuseteils 10 ausgebildet und unterbricht einen radial außen liegenden Verbindungsbereich 35 zwischen den beiden Förderkanälen 12, 14.In order to achieve the best possible delivery rate and pressure increase, the axial inlet 6 is as far away as possible from the tangential outlet 20 in the direction of rotation of the impeller 4. In order to reliably prevent a short-circuit flow counter to the direction of rotation of the impeller 4 from the inlet 6 to the outlet 20, known interruption areas 28 are provided on the pot part 10 and on the cover part 16 between the inlet 6 and the outlet 20. In the drawing, in Figure 2 however, only the interruption area 28 in the pot part 10 is shown. As a result, the smallest possible gap is present in the interruption regions 28 axially opposite the conveyor blades 22 of the impeller 4. Another interruption area 32 is formed on a radially delimiting wall 33 of the first housing part 10 and interrupts a radially outer connection area 35 between the two conveying channels 12, 14.

Das Topfteil 10 wird über nicht weiter dargestellte Schrauben am zweiten Deckelteil 16 befestigt, welche durch entsprechende Bohrungen 34 gesteckt werden, die an sich nach radial außen erstreckenden Vorsprüngen 36 am Topfteil 10 ausgebildet sind. Das Deckelteil 16 wird wiederum auf bekannte Weise mit einem Gehäuseteil 38 der Antriebseinheit 3 verbunden.The pot part 10 is fastened to the second cover part 16 by means of screws (not shown further) which are inserted through corresponding bores 34 on the radially outwardly extending projections 36 on the pot part 10 are formed. The cover part 16 is in turn connected in a known manner to a housing part 38 of the drive unit 3.

Radial hinter einer Wand 40 des Förderkanals 16 ist eine Nut 42 in Höhe einer Bodenfläche des Förderkanals 14 ausgebildet. Eine Trennebene 46 des Topfteiles 10 und des Deckelteils 16 verläuft auf diese Weise stufenförmig. Somit kann in zur Abdichtung zwischen Topfteil 10 und Deckelteil 16 eine Flüssigkeitsdichtung 48 in der Nut 42 vorgesehen sein, da die Flüssigkeitsdichtung 48 keine direkte Verbindung zum Gebläseraum 17 aufweist.A groove 42 is formed radially behind a wall 40 of the conveyor channel 16 at the level of a bottom surface of the conveyor channel 14. A parting plane 46 of the pot part 10 and the cover part 16 extends in this way in a stepped manner. Thus, a liquid seal 48 can be provided in the groove 42 for sealing between the pot part 10 and the cover part 16, since the liquid seal 48 has no direct connection to the blower chamber 17.

Radial vor einer Wand 50 des Förderkanals 12 ist ein ringförmiger Steg 52 ausgebildet, der nach dem Zusammenbau des Gebläses in eine korrespondierende Nut 54 des Laufrades 4 greift, wodurch eine Abdichtung vom Förderkanal 12 in Richtung zum Inneren des Laufrades 4 erfolgt. Zusätzlich weist das Topfteil 10 eine zylindrische Vertiefung 56 auf, in die die Antriebswelle 19 der Antriebseinheit 3 ragt.Radially in front of a wall 50 of the conveying channel 12 is an annular web 52 which, after the fan has been assembled, engages in a corresponding groove 54 of the impeller 4, thereby sealing the conveying channel 12 in the direction of the interior of the impeller 4. In addition, the pot part 10 has a cylindrical recess 56 into which the drive shaft 19 of the drive unit 3 protrudes.

Wie bereits aus dem Stand der Technik bekannt, weist der Auslass 20 einen tangentialen Auslasskanalabschnitt 58 auf, der nach außen gerichtet in einer Ausstoßöffnung 60 mündet. Die Förderkanäle 12, 14 sind über eine Auslassöffnung 62 mit dem Auslasskanalabschnitt 58 fluidisch verbunden. Erfindungsgemäß ist nun vorgesehen, dass eine erste und eine zweite Seitenkante 64, 66 eine erste Ebene E1 aufspannen, die mit einer zweiten Ebene E2, die durch die Ausstoßöffnung 60 aufgespannt ist, einen Winkel α ≥ 30°, hier ca. 57°, einschließt (siehe hierzu insbesondere Figur 3). Dies hat zur Folge, dass die Auslassöffnung 62 weit in die radial begrenzende Wand 33 hineinreicht und hierdurch eine "echte" tangentiale Ausströmung mit hohem Wirkungsgrad realisiert werden kann. In besonders einfacher Wiese kann zumindest das Topfteil 10 aus einem Duroplast als werkzeugfallendes Werkstück hergestellt werden.As already known from the prior art, the outlet 20 has a tangential outlet channel section 58 which, directed outwards, opens into an outlet opening 60. The delivery channels 12, 14 are fluidically connected to the outlet channel section 58 via an outlet opening 62. According to the invention, it is now provided that a first and a second side edge 64, 66 span a first plane E 1 which, with a second plane E 2 , which is spanned by the discharge opening 60, forms an angle α ≥ 30 °, here approx. 57 ° , includes (see in particular Figure 3 ). The consequence of this is that the outlet opening 62 extends far into the radially delimiting wall 33 and a “real” tangential outflow can thereby be realized with a high degree of efficiency. In a particularly simple manner, at least the pot part 10 can be produced from a thermosetting plastic as a workpiece off the tool.

Es sollte jedoch deutlich sein, dass verschiedene Modifikationen des im Ausführungsbeispiel beschriebenen Seitenkanalgebläses möglich sind, ohne den Schutzbereich des Hauptanspruchs zu verlassen. So kann es sich insbesondere um eine Pumpe mit nur einem Seitenkanal handeln, oder die Auslassöffnung und Unterbrecherform können sowohl bezüglich des den größeren Strom führenden zum Einlass weisenden Kanal als auch zum gegenüberliegenden Kanal korrespondierend ausgestaltet sein.However, it should be clear that various modifications of the side channel blower described in the exemplary embodiment are possible without departing from the scope of protection of the main claim. In particular, it can be a pump with only one side channel, or the outlet opening and interrupter shape can both carry the larger flow with respect to the one be designed to correspond to the inlet-facing channel and to the opposite channel.

Claims (4)

  1. Side channel blower, in particular a secondary air blower for an internal combustion engine, comprising
    a multi-part housing (2) having at least a first housing part (10) designed as a pot part and a second housing part (16) designed as a cover part, the pot part (10) and the cover part (16) being connected in a parting plane (46) with the interposition of a sealing element (48) and enclosing a blower chamber (17),
    wherein an inlet (6), which opens, via an inlet area (8), into at least one substantially annularly extending conveying channel (12, 14) having a radially delimiting wall (33),
    and an outlet (20) are formed,
    an impeller (4) adapted to be driven via a drive unit (3), is rotatably supported in the housing (2) and has conveyor blades (22) cooperating with the opposite conveyor channel (12, 14),
    and an interruption region (28, 32) between the inlet (6) and the outlet (20), in which the at least one conveying channel (12, 14) is interrupted in the circumferential direction, wherein
    the outlet (20) comprises an outlet channel section (58) into which the at least one conveyor channel (12, 14) opens, wherein the outlet channel section (58) comprises an outwardly directed discharge opening (60) and an outlet opening (62) directed towards the conveying channel (12, 14) with a first and a second side edge (64, 66), the first side edge (64) being part of the interruption region (32) and the second side edge (66) being part of the radially delimiting wall (33),
    wherein the first and the second side edge (64, 66) span a first plane f1 that forms an angle α ≥ 30° with a second plane f2, spanned by the outlet opening (60), such that the outlet opening (62) extends into the radially delimiting wall (33),
    characterized in that
    the parting plane (46) extends at the level of or below a bottom surface of the conveyor channel (14) in the cover part (16).
  2. Side channel blower according to claim 1, characterized in that the parting plane (46) extends in a step-shape and the sealing element (48) is designed as a liquid seal in a groove (42).
  3. Side channel blower according to one of the preceding claims, characterized in that the cover part (16) adjoins the drive unit (3).
  4. Side channel blower according to one of the preceding claims, characterized in that at least the pot part (10) is made from a thermosetting plastic as an off-tool workpiece.
EP18716283.9A 2017-12-21 2018-04-10 Side channel blower, in particular secondary air blower for an internal combustion engine Active EP3728860B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP2017084204 2017-12-21
PCT/EP2018/059176 WO2019120633A1 (en) 2017-12-21 2018-04-10 Side channel blower, in particular secondary air blower for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP3728860A1 EP3728860A1 (en) 2020-10-28
EP3728860B1 true EP3728860B1 (en) 2021-10-13

Family

ID=60915523

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Application Number Title Priority Date Filing Date
EP18716283.9A Active EP3728860B1 (en) 2017-12-21 2018-04-10 Side channel blower, in particular secondary air blower for an internal combustion engine

Country Status (3)

Country Link
EP (1) EP3728860B1 (en)
CN (1) CN111406155B (en)
WO (1) WO2019120633A1 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3016438C2 (en) * 1980-04-29 1985-12-19 Standard Elektrik Lorenz Ag, 7000 Stuttgart Cross-flow fan
DE10344719A1 (en) * 2003-09-26 2005-05-04 Elektror M Mueller Gmbh Side channel compressor with an annular impeller housing
DE102008056106B4 (en) * 2008-11-06 2011-02-17 Pierburg Gmbh Side channel blower, in particular secondary air blower for an internal combustion engine
DE102009006652B4 (en) 2009-01-29 2014-06-18 Pierburg Gmbh Side channel blower, in particular secondary air blower for an internal combustion engine
CN102686282B (en) * 2009-11-19 2014-10-01 瑞思迈发动机及马达技术股份有限公司 Blower
DE102010046870B4 (en) * 2010-09-29 2016-09-22 Pierburg Gmbh Side channel blower, in particular secondary air blower for an internal combustion engine
DE102010061994A1 (en) * 2010-11-25 2012-05-31 Gardner Denver Deutschland Gmbh Blower assembly
CN103573707B (en) * 2012-07-18 2016-08-31 珠海格力电器股份有限公司 Spiral case
CN104564803B (en) * 2015-01-16 2018-01-12 珠海格力电器股份有限公司 Centrifugal impeller, centrifugal blower component and air-conditioner set
DE102015213549A1 (en) * 2015-07-17 2017-01-19 Gardner Denver Deutschland Gmbh Side channel machine
CN106427474B (en) * 2016-11-09 2019-07-26 珠海格力电器股份有限公司 Car and its on-board air conditioner

Also Published As

Publication number Publication date
CN111406155A (en) 2020-07-10
CN111406155B (en) 2022-04-29
EP3728860A1 (en) 2020-10-28
WO2019120633A1 (en) 2019-06-27

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