EP0819855B1 - High-pressure blower - Google Patents

High-pressure blower Download PDF

Info

Publication number
EP0819855B1
EP0819855B1 EP97401743A EP97401743A EP0819855B1 EP 0819855 B1 EP0819855 B1 EP 0819855B1 EP 97401743 A EP97401743 A EP 97401743A EP 97401743 A EP97401743 A EP 97401743A EP 0819855 B1 EP0819855 B1 EP 0819855B1
Authority
EP
European Patent Office
Prior art keywords
high pressure
pressure fan
tube
shaped case
blades
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
EP97401743A
Other languages
German (de)
French (fr)
Other versions
EP0819855A1 (en
Inventor
Reinhold Hopfensperger
Rudolf Tungl
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.)
Motoren Ventilatoren Landshut GmbH
Original Assignee
Ebm Papst Landshut 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 Ebm Papst Landshut GmbH filed Critical Ebm Papst Landshut GmbH
Publication of EP0819855A1 publication Critical patent/EP0819855A1/en
Application granted granted Critical
Publication of EP0819855B1 publication Critical patent/EP0819855B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/165—Axial entry and discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/301—Pressure

Definitions

  • the invention relates to a high-pressure fan to promote a gaseous medium, according to the preamble of claim 1.
  • blower is known (DE-A-38 42 697).
  • Blower is a high pressure blower like it can be used for example for gas burners.
  • blowers should have a steep pressure-volume characteristic, i.e. one The change in the static differential pressure has only a small one Reduced volume flow.
  • the well-known high pressure blower shows for most applications has an overly complex structure, i.e. its production is closed consuming.
  • the specific performance of the known Blower not sufficient for many uses.
  • the technical problem underlying the invention therefore exists in creating a high pressure blower that works with limited Dimensions, which are usually determined by the device in which the blower is used, are predetermined and the use of a Large series engine generates the highest possible pressure and yet is easy to set up and manufacture.
  • High pressure blower a device for measuring the volume flow contains.
  • Such a high pressure blower produces despite being relatively low Dimensions a high pressure and a large volume flow. It is also with a device for measuring the throughput Mistake.
  • the high-pressure blower is arranged in the tubular casing 1, which for example has an inner diameter of 150 mm.
  • the high pressure blower mounted in the casing containing the electric motor 1 2, for example a DC motor with a target rotation speed of 5,000 min -1.
  • the inflow nozzle 3 is provided with the annular channel 6, which has an annular slot 7 towards the opening and is connected via the opening 8 to the connection A outside the tubular casing 1.
  • the space above the inflow nozzle 3 is connected via connection B to the space outside the tubular casing 1.
  • Differential pressure values can be measured between ports A and B, which are proportional to the volume flow of the high-pressure blower (quadratic function).
  • the impeller is connected to the motor shaft 4. It consists of the flat rear plate 10 provided with a plate-like edge 9, the flat front cover plate 11 and the blades 12 arranged between them, which should be curved backwards, for example.
  • the deflection disk 13 is arranged after the impeller. She owns a slightly smaller diameter than the impeller. Between her The circumference and the inner diameter of the tubular shell 1 is a Annular gap 14 narrowing the flow path is formed.
  • FIG. 2 shows a high-pressure fan, which is constructed in the same way as the high-pressure fan in FIG. 1.
  • the same components are provided with the same reference numerals.
  • the electric motor 2 is arranged behind the other parts in the flow direction.
  • the proposed high-pressure blowers are particularly suitable, for example, for being assembled with a gas burner.
  • FIG. 3 Such a blower is shown in FIG. 3, for example.
  • the motor 2 is attached to a closed wall 15 so that an inflow space 18 is present between it and the inflow nozzle 3.
  • the air required to form the gas-air mixture becomes the Inflow chamber 18 fed radially, as illustrated by the arrows 19.
  • the gas is supplied via the feed pipe A 2, which is connected to the ring channel 6 communicates. It passes through the ring channel 6 the slot 7 into the inlet nozzle 3.
  • the slot 7 only extends over part of the circumference of the inlet nozzle 3, for example over 340 degrees.
  • the lid 20 On the outflow side of the high pressure blower is a spherical dome-shaped, with a large number of openings Cover 20 provided.
  • the lid 20 may be hemispherical Be sieve bottom.
  • the inflow nozzle of the High pressure blower on two ring channels As can be seen from Fig. 3, the inflow nozzle of the High pressure blower on two ring channels.
  • the upper ring channel 21, which is provided with the connecting piece A 1 is used for acceptance a control pressure.
  • the size of the one taken off at the connector A 1 Pressure is proportional to the volume of air delivered.
  • the lower ring channel 6, which is provided with the connecting piece A 2, is intended for gas supply.
  • Throttle device 17 is on the wall 15 with interposition of a tube 16 provided with an external thread is a conical one Throttle device 17 is provided.
  • This throttle device 17 is axially adjustable by twisting so that they are within of a certain area in different positions to the inlet nozzle 3 can be brought.
  • the throttle device can for one existing negative pressure in the ring channels within a certain Range of different volume flows or different air volumes can be set. Because there is a correlation between air volume and Burner output, the maximum burner output at a predetermined fan speed and a predetermined differential pressure continuously adjustable between A 1 and B.
  • Fig. 5 shows the top view of the underside of the impeller cover plate not present. It is the rear pane 10 with to recognize the backward curved blades 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)

Description

Die Erfindung betrifft ein Hochdruck-Gebläse zur Förderung eines gasförmigen Mediums, gemäß der Preambel des Anspruchs 1.The invention relates to a high-pressure fan to promote a gaseous medium, according to the preamble of claim 1.

Ein solches Gebläse ist bekannt (DE-A-38 42 697). Bei dem bekannten Gebläse handelt es sich um ein Hochdruck-Gebläse, wie es beispielsweise für Gasbrenner verwendet werden kann. Solche Gebläse sollen eine steile Druck-Volumen-Kennlinie aufweisen, d.h., eine Änderung des statischen Differenzdrucks hat nur eine geringe Verminderung des Volumenstromes zur Folge.Such a blower is known (DE-A-38 42 697). With the known Blower is a high pressure blower like it can be used for example for gas burners. Such blowers should have a steep pressure-volume characteristic, i.e. one The change in the static differential pressure has only a small one Reduced volume flow.

Das bekannte Hochdruck-Gebläse weist für die meisten Anwendungsfälle noch einen zu aufwendigen Aufbau auf, d.h., seine Herstellung ist zu aufwendig. Außerdem ist die spezifische Leistung des bekannten Gebläses für viele Verwendungszwecke nicht ausreichend.The well-known high pressure blower shows for most applications has an overly complex structure, i.e. its production is closed consuming. In addition, the specific performance of the known Blower not sufficient for many uses.

Ein ähnliches Gebläse ist auch aus US Re. 23126 bekannt.A similar blower is also from US Re. 23126 known.

Das der Erfindung zugrunde liegende technische Problem besteht deshalb darin, ein Hochdruck-Gebläse zu schaffen, welches bei begrenzten Abmessungen, welche in der Regel durch das Gerät, in dem das Gebläse eingesetzt wird, vorgegeben sind und der Verwendung eines Großserienmotors einen möglichst hohen Druck erzeugt und dennoch einfach aufgebaut und zu fertigen ist. The technical problem underlying the invention therefore exists in creating a high pressure blower that works with limited Dimensions, which are usually determined by the device in which the blower is used, are predetermined and the use of a Large series engine generates the highest possible pressure and yet is easy to set up and manufacture.

Außerdem ist für einige Anwendungen auch erwünscht, daß das Hochdruck-Gebläse eine Vorrichtung zur Messung des Volumenstromes enthält.It is also desirable for some applications that High pressure blower a device for measuring the volume flow contains.

Dieses technische Problem ist erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst.According to the invention, this technical problem is due to the features of claim 1 solved.

In der rohrförmigen Hülle des Hochdruck-Gebläses sind folgende Teile angeordnet:

  • a) ein an der rohrförmigen Hülle befestigter Elektromotor,
  • b) eine scheibenförmige Einströmdüse, welche im Bereich der Motorwelle eine kreisförmige Öffnung aufweist,
  • c) ein geschlossenes Gebläserad mit einer ebenen, mit einem tellerförmigen Rand versehenen rückseitigen Scheibe, einer ebenen vorderen Deckscheibe mit kleinerem Durchmesser als dem der rückseitigen Scheibe und einer Mehrzahl von zwischen der Scheibe und der Deckscheibe angeordneten Schaufeln,
  • d) eine Umlenkscheibe, deren Durchmesser kleiner als der der Scheibe ist und welche einen ringförmigen, den Strömungsweg verengenden Spalt an der Innenseite der rohrförmigen Hülle bildet.
    • The following parts are arranged in the tubular casing of the high-pressure blower:
  • a) an electric motor attached to the tubular shell,
  • b) a disk-shaped inflow nozzle which has a circular opening in the area of the motor shaft,
  • c) a closed impeller with a flat rear disk provided with a plate-shaped edge, a flat front cover disk with a smaller diameter than that of the rear disk and a plurality of blades arranged between the disk and the cover disk,
  • d) a deflection disk, the diameter of which is smaller than that of the disk and which forms an annular gap narrowing the flow path on the inside of the tubular casing.

    • Ein solches Hochdruck-Gebläse erzeugt trotz relativ geringer Abmessungen einen hohen Druck und einen großen Volumenstrom. Es ist auch mit einer Vorrichtung zur Messung des durchgesetzten Volumens versehen.Such a high pressure blower produces despite being relatively low Dimensions a high pressure and a large volume flow. It is also with a device for measuring the throughput Mistake.

    Vorteilhafte Einzelheiten der Erfindung sind in den Ansprüchen 2 bis 9 enthalten; sie ist nachstehend anhand der in den Figuren 1 und 5 gezeigten Ausführungsbeispielen erläutert. Es zeigen:

    Fig.1
    den prinzipiellen Aufbau des neuen Hochdruck-Gebläses im Längsschnitt,
    Fig.2
    die Ausgestaltung des neuen Hochdruck-Gebläses mit einer anderen Anordnung des Elektromotors als bei dem Hochdruck-Gebläse gemäß Fig. 1,
    Fig. 3
    die Ausgestaltung des neuen Hochdruck-Gebläses für einen Anwendungsfall,
    Fig. 4
    den vergrößerten Ausschnitt aus Fig. 3 und
    Fig. 5
    die Draufsicht auf die Schaufeln des Gebläserades.
    Advantageous details of the invention are contained in claims 2 to 9; it is explained below on the basis of the exemplary embodiments shown in FIGS. 1 and 5. Show it:
    Fig.1
    the basic structure of the new high-pressure blower in longitudinal section,
    Fig.2
    the design of the new high-pressure blower with a different arrangement of the electric motor than in the high-pressure blower according to FIG. 1,
    Fig. 3
    the design of the new high pressure blower for an application,
    Fig. 4
    the enlarged section of Fig. 3 and
    Fig. 5
    the top view of the blades of the impeller.

    Wie aus Fig.1 zu erkennen ist, ist das Hochdruck-Gebläse in der rohrförmigen Hülle 1 angeordnet, welche beispielsweise einen Innendurchmesser von 150 mm besitzt. Das Hochdruck-Gebläse enthält den in der Hülle 1 befestigten Elektromotor 2, beispielsweise einen Gleichstrommotor mit einer Solldrehzahl von 5.000 min -1. An der Abtriebseite des Elektromotors 2 ist die scheibenförmige Einströmdüse 3 vorhanden, welche im Bereich der Motorwelle 4 eine kreisförmige Öffnung 5 aufweist. Im Bereich der Öffnung 5 ist die Einströmdüse 3 mit dem Ringkanal 6 versehen, der zur Öffnung hin einen ringförmigen Schlitz 7 besitzt und über die Öffnung 8 mit dem Anschluß A außerhalb der rohrförmigen Hülle 1 in Verbindung steht. Der Raum oberhalb der Einströmdüse 3 steht über den Anschluß B mit dem Raum außerhalb der rohrförmigen Hülle 1 in Verbindung. Zwischen den Anschlüssen A und B können Differenzdruck-Werte gemessen werden, welche dem Volumenstrom des Hochdruck-Gebläses proportional (quadratische Funktion) sind. Mit der Motorwelle 4 ist das Gebläserad verbunden. Es besteht aus der flachen, mit einem tellerartigen Rand 9 versehenen rückseitigen Scheibe 10, der ebenen vorderen Deckscheibe 11 und den dazwischen angeordneten Schaufeln 12, welche beispielsweise rückwärts gekrümmt sein sollen. As can be seen from FIG. 1, the high-pressure blower is arranged in the tubular casing 1, which for example has an inner diameter of 150 mm. The high pressure blower mounted in the casing containing the electric motor 1 2, for example a DC motor with a target rotation speed of 5,000 min -1. On the output side of the electric motor 2 there is a disk-shaped inflow nozzle 3, which has a circular opening 5 in the area of the motor shaft 4. In the area of the opening 5, the inflow nozzle 3 is provided with the annular channel 6, which has an annular slot 7 towards the opening and is connected via the opening 8 to the connection A outside the tubular casing 1. The space above the inflow nozzle 3 is connected via connection B to the space outside the tubular casing 1. Differential pressure values can be measured between ports A and B, which are proportional to the volume flow of the high-pressure blower (quadratic function). The impeller is connected to the motor shaft 4. It consists of the flat rear plate 10 provided with a plate-like edge 9, the flat front cover plate 11 and the blades 12 arranged between them, which should be curved backwards, for example.

    Nach dem Gebläserad ist die Umlenkscheibe 13 angeordnet. Sie besitzt einen etwas geringeren Durchmesser als das Gebläserad. Zwischen ihrem Umfang und dem Innendurchmesser der rohrförmigen Hülle 1 ist ein den Strömungsweg verengender ringförmiger Spalt 14 gebildet.The deflection disk 13 is arranged after the impeller. she owns a slightly smaller diameter than the impeller. Between her The circumference and the inner diameter of the tubular shell 1 is a Annular gap 14 narrowing the flow path is formed.

    Ein solches Hochdruck-Gebläse weist folgende Funktionsweise auf:Such a high-pressure blower works as follows:

    Beim im Betrieb befindlichen Gebläserad verläßt - falls kein oder nur ein geringer Gegendruck vorhanden ist - ein sehr großer Teil der durch die Einströmdüse 3 angesaugten Volumens nach Durchströmung auf direktem Weg das Gebläserad. Bei zunehmenden Druck wird ein Teil des zu fördernden Mediums, welches die Schaufeln des Gebläserades verläßt, wieder in die Schaufeln zurückgeführt und nochmals beschleunigt. Durch die Mehrfachbeschleunigung werden hohe Drücke und eine steile Druck-Volumen-Kennlinie erreicht.When the fan wheel is in operation it leaves - if none or only a low back pressure is present - a very large part of the through the inflow nozzle 3 sucked volume after flow the impeller directly. With increasing pressure, part of the medium to be conveyed, which leaves the blades of the impeller, returned to the blades and accelerated again. By the multiple acceleration become high pressures and a steep one Pressure-volume characteristic curve reached.

    Das bedeutet, daß bei einer Änderung des Gegendrucks nur geringe Volumenstromänderungen auftreten. Bei einem Ausführungsbeispiel des gezeigten Hochdruck-Gebläses wurde bei einem Gegendruck von ca. 600 Pascal ein Volumenstrom von 12l/s verwirklicht.This means that when the back pressure changes, only a small amount Volume flow changes occur. In one embodiment of the shown high pressure blower was at a back pressure of approx. 600 Pascal realized a volume flow of 12l / s.

    Fig.2 zeigt ein Hochdruck-Gebläse, welches in gleicher Weise aufgebaut ist, wie das Hochdruck-Gebläse in Fig.1. Die gleichen Bestandteile sind mit den gleichen Bezugszeichen versehen. Im Unterschied zu dem Ausführungsbeispiel des Hochdruck-Gebläses in Fig. 1 ist der Elektromotor 2 in Strömungsrichtung hinter den anderen Teilen angeordnet.
    Die vorgeschlagenen Hochdruck-Gebläse sind beispielsweise besonders geeignet, um mit einem Gasbrenner zusammengesetzt zu werden.    FIG. 2 shows a high-pressure fan, which is constructed in the same way as the high-pressure fan in FIG. 1. The same components are provided with the same reference numerals. In contrast to the exemplary embodiment of the high-pressure blower in FIG. 1, the electric motor 2 is arranged behind the other parts in the flow direction.
    The proposed high-pressure blowers are particularly suitable, for example, for being assembled with a gas burner.

    Ein solches Gebläse ist beispielsweise in Fig. 3 gezeigt. Die Bestandteile dieses Gebläses, welche mit den in Fig. 1 und Fig. 2 gezeigten Gebläsen identisch sind, sind mit den gleichen Bezugszeichen versehen. Such a blower is shown in FIG. 3, for example. The Components of this blower, which are identical to those in FIGS. 1 and 2 Blowers shown are identical, are given the same reference numerals Mistake.

    Der Motor 2 ist an einer geschlossenen Wand 15 befestigt, so daß zwischen ihr und der Einströmdüse 3 ein Anströmraum 18 vorhanden ist. Die zur Bildung des Gas-Luftgemisches benötigte Luft wird dem Anströmraum 18 radial zugeführt, wie durch die Pfeile 19 verdeutlicht.The motor 2 is attached to a closed wall 15 so that an inflow space 18 is present between it and the inflow nozzle 3. The air required to form the gas-air mixture becomes the Inflow chamber 18 fed radially, as illustrated by the arrows 19.

    Das Gas wird über das Zuführungsrohr A 2, welches mit dem Ringkanal 6 in Verbindung steht, zugeführt. Es gelangt aus dem Ringkanal 6 durch den Schlitz 7 in die Einströmdüse 3. Der Schlitz 7 erstreckt sich nur über einen Teil des Umfangs der Einströmdüse 3, beispielsweise über 340 Winkelgrade.The gas is supplied via the feed pipe A 2, which is connected to the ring channel 6 communicates. It passes through the ring channel 6 the slot 7 into the inlet nozzle 3. The slot 7 only extends over part of the circumference of the inlet nozzle 3, for example over 340 degrees.

    Auf der Ausströmseite des Hochdruck-Gebläses ist ein kugelkalottenförmiger, mit einer Vielzahl von Öffnungen versehener Deckel 20 vorgesehen. Der Deckel 20 kann ein halbkugelförmiger Siebboden sein.On the outflow side of the high pressure blower is a spherical dome-shaped, with a large number of openings Cover 20 provided. The lid 20 may be hemispherical Be sieve bottom.

    Das Hochdruck-Gebläse gemäß Fig. 3 eignet sich besonders für den Einsatz bei solchen Gasbrennern, bei denen eine kreisförmige oder ringförmige Austrittsöffnung benötigt wird. Wenn das Gas am Zuführungsrohr A 2 zugeführt wird, ergibt sich durch die Teilrückführung des Gas-Luftgemisches in das Gebläserad eine sehr gute Durchmischung des Ausgangskomponenten Gas und Luft, welches sich sehr positiv auf die Emissionswerte des Gasbrenners auswirkt.3 is particularly suitable for the Use in such gas burners where a circular or annular outlet opening is required. If the gas on Feed pipe A 2 is fed, results from the Partial return of the gas-air mixture into the impeller is a very good one Mixing of the starting components gas and air, which is very has a positive effect on the emission values of the gas burner.

    Wie aus Fig. 3 zu erkennen ist, weist die Einströmdüse des Hochdruck-Gebläses zwei Ringkanäle auf. Der obere Ringkanal 21, welcher mit dem Anschlußstutzen A 1 versehen ist, dient zur Abnahme eines Steuerdruckes. Die Größe des am Anschlußstutzen A 1 abgenommenen Drucks ist dem jeweils geförderten Luftvolumen proportional. Der untere Ringkanal 6, welcher mit dem Anschlußstutzen A 2 versehen ist, ist für die Gaszuführung vorgesehen. As can be seen from Fig. 3, the inflow nozzle of the High pressure blower on two ring channels. The upper ring channel 21, which is provided with the connecting piece A 1 is used for acceptance a control pressure. The size of the one taken off at the connector A 1 Pressure is proportional to the volume of air delivered. The lower ring channel 6, which is provided with the connecting piece A 2, is intended for gas supply.

    Wie aus Fig. 4 zu erkennen, ist an der Wand 15 unter Zwischenschaltung eines mit einem Außengewinde versehenen Rohres 16 eine kegelförmige Drossel vorrichtung 17 vorgesehen. Diese Drosselvorrichtung 17 ist durch Verdrehen axial verstellbar ausgebildet, so daß sie innerhalb eines bestimmten Bereiches in verschiedene Positionen zur Einströmdüse 3 gebracht werden kann. Mit der Drosselvorrichtung kann für einen vorhandenen Unterdruck in den Ringkanälen innerhalb eines bestimmten Bereiches verschiedene Volumenströme oder verschiedene Luftmengen eingestellt werden. Da eine Wechselbeziehung zwischen Luftmenge und Brennerleistung besteht, kann die maximale Brennerleistung bei einer vorgegebenen Lüfterdrehzahl und einem vorgegebenen Differenzdruck zwischen A 1 und B stufenlos eingestellt werden.As can be seen from Fig. 4, is on the wall 15 with interposition of a tube 16 provided with an external thread is a conical one Throttle device 17 is provided. This throttle device 17 is axially adjustable by twisting so that they are within of a certain area in different positions to the inlet nozzle 3 can be brought. With the throttle device can for one existing negative pressure in the ring channels within a certain Range of different volume flows or different air volumes can be set. Because there is a correlation between air volume and Burner output, the maximum burner output at a predetermined fan speed and a predetermined differential pressure continuously adjustable between A 1 and B.

    Fig. 5 zeigt die Draufsicht auf die Unterseite des Gebläserades bei nicht vorhandener Deckscheibe. Es ist die rückseitige Scheibe 10 mit den rückwärts gekrümmten Schaufeln 12 zu erkennen.Fig. 5 shows the top view of the underside of the impeller cover plate not present. It is the rear pane 10 with to recognize the backward curved blades 12.

    Claims (11)

    1. A high pressure fan for conveying a gaseous medium, wherein in a tube-shaped case a fan wheel is arranged which essentially takes in axially, accelerates radially and blows out axially the medium and wherein a fixed guiding device is arranged in the tube-shaped case downstream of the fan wheel, the following parts being arranged in the tube-shaped case (1):
      a) an electric motor (2) attached to the tube-shaped case (1) and having a motor shaft,
      b) an inflow nozzle (3)
      c) a closed fan wheel with a rear disc (10) and a front cover disc (11) having a smaller diameter than that of the rear disc and a plurality of blades (12) arranged between the disc (10),
      characterized by
      d) a baffle disc (13) having a smaller diameter than that of the disc (10) and forming an annular gap (14) narrowing the flow path at the inside of the tube-shaped case (1).
    2. A high pressure fan as claimed in claim 1, characterized in that the electric motor (2) is arranged upstream of the parts a) to d).
    3. A high pressure fan as claimed in claim 1, characterized in that the electric motor (2) is arranged downstream of the parts a) to d).
    4. A high pressure fan as claimed in claims 1 to 3, characterized by the following features:
      a) the inflow nozzle (3) has in the area of the circular opening (5) an annular channel (6) which has a circular annular gap (7) facing the opening (5),
      b) the annular channel (6) is in communication with the outside of the tube-shaped case (1) through an opening (8),
      c) the interior of the tube-shaped case above the inflow nozzle (3) is in communication with the outside of the tube-shaped case through another opening (B).
    5. A high pressure fan as claimed in claims 1 to 4, characterized in that an axially adjustable conical throttle device is provided in the area of the opening (5) of the inflow nozzle (3).
    6. A high pressure fan as claimed in claims 1 to 5, characterized in that between a wall (15) present at the drive side of the motor and the inflow nozzle (3) a flow space (18) is formed, wherein a supply duct (A 2) is present in the wall (15) and the flow space has supply flow openings (19).
    7. A high pressure fan as claimed in claims 1 to 6, characterized in that the blades (12) are curved backward.
    8. A high pressure fan as claimed in claims 1 to 6, characterized in that the blades (12) are formed ending radially.
    9. A high pressure fan as claimed in claims 1 to 6, characterized in that the blades (12) are curved forward.
    10. A high pressure fan as claimed in one of the preceding claims 1 to 9, characterized in that at increasing pressure a portion of the medium to be conveyed leaving the blades of the fan wheel is redirected onto the blades and accelerated again.
    11. A high pressure fan as claimed in one of the preceding claims 1 to 10, characterized in that the diameter of the front cover disc (11) is smaller than that of the baffle disc (13).
    EP97401743A 1996-07-19 1997-07-21 High-pressure blower Expired - Lifetime EP0819855B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19629220 1996-07-19
    DE19629220A DE19629220B4 (en) 1996-07-19 1996-07-19 High Pressure Blower

    Publications (2)

    Publication Number Publication Date
    EP0819855A1 EP0819855A1 (en) 1998-01-21
    EP0819855B1 true EP0819855B1 (en) 2004-11-17

    Family

    ID=7800314

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP97401743A Expired - Lifetime EP0819855B1 (en) 1996-07-19 1997-07-21 High-pressure blower

    Country Status (2)

    Country Link
    EP (1) EP0819855B1 (en)
    DE (2) DE19629220B4 (en)

    Families Citing this family (9)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19640890B8 (en) * 1996-07-19 2005-12-01 Motoren Ventilatoren Landshut Gmbh High Pressure Blower
    CN1228568C (en) * 2001-03-23 2005-11-23 多孔燃烧器技术销售有限责任公司 Method and apparatus for setting air ratio
    DE10118336B4 (en) * 2001-04-12 2016-03-24 Robert Bosch Gmbh Blower for a gas condensing boiler
    KR100748966B1 (en) * 2005-01-25 2007-08-13 엘지전자 주식회사 Fan
    US10576227B2 (en) * 2011-04-18 2020-03-03 Resmed Motor Technologies Inc PAP system blower
    PL2700822T3 (en) * 2012-08-24 2017-06-30 Zehnder Group International Ag Radial fan casing with pressure tapping duct integrated in the fan inlet
    DE102015000629A1 (en) * 2015-01-22 2016-07-28 Viessmann Werke Gmbh & Co Kg Turbo compressor
    DE102016118369A1 (en) * 2016-09-28 2018-03-29 Ebm-Papst Mulfingen Gmbh & Co. Kg Suction nozzle and blow-out unit of a fan
    CN113187762A (en) * 2021-05-07 2021-07-30 青岛丙田机电科技有限公司 Direct current hemisphere formula wind wheel and fan

    Family Cites Families (11)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    USRE23126E (en) * 1949-06-21 Aib compressor
    FR879346A (en) * 1941-02-17 1943-02-19 Ventilator A G Fan
    US3059833A (en) * 1956-10-17 1962-10-23 Remi A Benoit Fans
    GB849744A (en) * 1958-01-30 1960-09-28 Blackman Keith Ltd Improvements in fans
    DE2313269C3 (en) * 1973-03-16 1978-10-12 Eisenwerke Gaggenau Gmbh, 7560 Gaggenau Toilet seat with a conveyor unit that can be installed in a hollow rear extension piece
    DE3842697A1 (en) * 1988-12-19 1990-06-21 Standard Elektrik Lorenz Ag HIGH PRESSURE BLOWER
    DE3843463A1 (en) * 1988-12-23 1990-06-28 Hans Kohl Blower for the conveyance of gases
    DE4020236A1 (en) * 1990-06-26 1992-01-02 Keller Lufttechnik Gmbh & Co Kg Radial-flow fan within air suction duct
    DE9104643U1 (en) * 1991-04-16 1991-10-10 Keller Lufttechnik GmbH + Co KG, 7312 Kirchheim Fan unit
    DE4141362C2 (en) * 1991-12-14 2002-10-24 Motoren Ventilatoren Gmbh Radial blower with throttle device
    DE4213047A1 (en) * 1992-04-21 1993-10-28 Kuehnle Kopp Kausch Ag Radial compressor for vehicle exhaust gas turbocharger - uses feed pipe to deliver flow medium to influence conditions in circulation chamber

    Also Published As

    Publication number Publication date
    DE19629220B4 (en) 2005-05-12
    DE59712081D1 (en) 2004-12-23
    DE19629220A1 (en) 1998-01-22
    EP0819855A1 (en) 1998-01-21

    Similar Documents

    Publication Publication Date Title
    DE2429951C2 (en) Fuel injector for a jet engine
    DE2801374C2 (en) Gas turbine engine with tail fan
    DE2744366C2 (en) Radial impeller for a turbo compressor
    DE2632155C3 (en) Gas turbine jet engine
    EP0890787B1 (en) Mixing device for gas and combustion air in a combustion installation
    DE69631459T2 (en) jet fan
    DE2837543A1 (en) Fume hood
    EP0819855B1 (en) High-pressure blower
    DE4429473C2 (en) Air classifier
    DE2836265A1 (en) DIFFUSER FOR THE EXIT OF AN AXIAL TURBINE
    DE4335686B4 (en) fan
    EP0589300A1 (en) Radial blower
    DE2556382C3 (en) Centrifugal air classifier
    EP1571341B1 (en) Multistage vacuum fan
    DE19626896A1 (en) Fan, e.g. for cooker extractor hood
    EP0753657B1 (en) Intake air manifold for an internal combustion engine
    EP2700822B1 (en) Radial fan casing with pressure tapping duct integrated in the fan inlet
    EP1353054B1 (en) Turboprop engine
    DE2656040A1 (en) Centrifugal blower with vol. control - has axially adjustable inlet venturi which limits effective blade width and permits recirculation through remaining width
    DE4141362C2 (en) Radial blower with throttle device
    DE1428150A1 (en) Axial fan, especially for use with oil burners
    EP0404722B1 (en) Air humidifier
    DE513237C (en) humidifier
    DE2705260A1 (en) Radial blade high pressure blower - has inlet cone extending inside impeller to stabilise performance at low volumes
    DE2160675C3 (en) Burner device for a gas turbine combustion chamber

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): DE FR GB IT

    17P Request for examination filed

    Effective date: 19980514

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: MOTOREN VENTILATOREN LANDSHUT GMBH

    AKX Designation fees paid

    Free format text: DE FR GB IT

    RBV Designated contracting states (corrected)

    Designated state(s): DE FR GB IT

    17Q First examination report despatched

    Effective date: 20011207

    GRAP Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOSNIGR1

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: EBM-PAPST LANDSHUT GMBH

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): DE FR GB IT

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REF Corresponds to:

    Ref document number: 59712081

    Country of ref document: DE

    Date of ref document: 20041223

    Kind code of ref document: P

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20050214

    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    ET Fr: translation filed
    26N No opposition filed

    Effective date: 20050818

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20130925

    Year of fee payment: 17

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20130722

    Year of fee payment: 17

    Ref country code: GB

    Payment date: 20130719

    Year of fee payment: 17

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: IT

    Payment date: 20130726

    Year of fee payment: 17

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R119

    Ref document number: 59712081

    Country of ref document: DE

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20140721

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20150331

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20140721

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20150203

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20140731

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20140721

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R119

    Ref document number: 59712081

    Country of ref document: DE

    Effective date: 20150203