EP0148485B1 - Partie d'un carter de brûleur du côté de l'aspiration d'air - Google Patents

Partie d'un carter de brûleur du côté de l'aspiration d'air Download PDF

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Publication number
EP0148485B1
EP0148485B1 EP84116049A EP84116049A EP0148485B1 EP 0148485 B1 EP0148485 B1 EP 0148485B1 EP 84116049 A EP84116049 A EP 84116049A EP 84116049 A EP84116049 A EP 84116049A EP 0148485 B1 EP0148485 B1 EP 0148485B1
Authority
EP
European Patent Office
Prior art keywords
housing part
air
sound
housing
core
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
Application number
EP84116049A
Other languages
German (de)
English (en)
Other versions
EP0148485A3 (en
EP0148485A2 (fr
Inventor
Siegfried Dipl.-Ing. Weishaupt
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.)
Max Weishaupt GmbH
Original Assignee
Max Weishaupt 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 Max Weishaupt GmbH filed Critical Max Weishaupt GmbH
Priority to AT84116049T priority Critical patent/ATE34827T1/de
Publication of EP0148485A2 publication Critical patent/EP0148485A2/fr
Publication of EP0148485A3 publication Critical patent/EP0148485A3/de
Application granted granted Critical
Publication of EP0148485B1 publication Critical patent/EP0148485B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/001—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space spraying nozzle combined with forced draft fan in one unit

Definitions

  • the invention relates to an air intake housing part of a burner housing with the features of the preamble of claim 1.
  • Burners of the type in question often develop disturbingly high noise levels due to the air intake, especially in the case of large burners, in particular for industrial use, for example in the order of magnitude of 90 dB. To remedy this, the entire burner housing has so far been covered with a sound-absorbing hood. Intake silencers have also been provided in the area of the air inlet opening of the air intake housing (FR-A-1 596 223). These measures are expensive to manufacture and space and bulky, which is particularly noticeable in the course of maintenance work.
  • the air inlet is designed in the form of openings on part of the circumference, the opening plane of which is approximately perpendicular to the inlet opening of the blower.
  • a layer made of a sound-absorbing material is provided, which is located on the inner surface of the air intake housing part.
  • Approximately half of the air transfer area between the intake housing and the impeller is covered by a semicircular plate in such a way that the sound-absorbing layer extends around the remaining transition area, which is not covered by the semicircular plate. This is intended to dampen air noises generated by the impeller caused by turbulence in the area of the fan blades working against a pressure cushion. Sound waves reflected by the semicircular sheet metal, which can then only emerge through the remaining transition surface between the impeller and the intake housing, are to be absorbed by the sound-absorbing layer.
  • the sound absorption provided according to the invention is limited to measures on the air intake housing part, specifically in such a way that noises caused by the intake air are damped. This is achieved with the aid of a sound absorber, which has a core, which has both the air inlet opening and the air transfer opening facing sides.
  • the outer sides of the core lying outside the sound reinforcement are provided with a specifically heavier plastic mass layer, a so-called heavy layer, which serves in particular to insulate structure-borne noise.
  • the heavy layer is first applied to the adjacent inner surfaces of the housing part, so that a tight and stable connection is created between the heavy layer and the outer shell. The space covered by the heavy layer is then foamed with the plastic that forms the core.
  • the housing part is preferably designed as an independent component and can be connected to the wall of the burner housing comprising the inlet opening of the fan wheel with respect to its wall region comprising the air transfer opening.
  • the inner walls of the air intake housing part are lined with sound-absorbing material.
  • the housing section in which the sound absorber is formed is designed as a cover or the like, which is removably attached to the rest of the housing region of the housing part, which is designed as a lower part.
  • This not only facilitates the manufacture of the absorber part; when the cover is removed, the area of the transfer opening and a shaft section of the burner motor which possibly crosses the lower part of the housing part are accessible.
  • the wall area serving to fix the air intake housing part, which includes the air transfer opening, is preferably formed overall on the lower part, while the cover forming the sound absorber comprises the other walls of the housing section.
  • the parting line between the lower part and the cover is provided so far from the air intake opening that it lies above the shaft bushing.
  • the sound-absorbing material of the core of the sound absorber can contain, for example, a fiber material, but the core is preferably formed in the form of an open-pore plastic foam, for example a flexible polyurethane foam.
  • the sound reinforcement sides of the sound absorber core are sealed, which is basically done by skin covering the foam surfaces hen, but preferably happens with the help of a laminated film.
  • FIG. 1 to 3 show a large burner of the type in question, which has a burner housing 1, which is connected to a flame head 2 via a hinge connection - these known devices are not described in detail here.
  • An impeller 3 is arranged inside the burner housing 1 and can be driven by a burner motor 4 arranged in an indentation in the one side wall of the burner housing.
  • An intermediate shaft 5 is connected to the end region of the drive shaft of the burner motor 4 which is connected in a rotationally fixed manner to the fan wheel 3 and drives a pump 6 which serves to supply oil to the flame head 2.
  • the pump 6 is arranged on the outside of an air intake housing part 7 which is fixed on the other side wall of the burner housing 1.
  • the air intake housing part 7 consists of a lower part 8 and a housing section 9, which is designed as a cover 10.
  • This housing section 9 or cover 10 forms the housing region opposite the air inlet opening 11 of the air intake housing part - hereinafter referred to as housing part for short.
  • the air sucked in by the driven impeller, which enters the housing part 7 via the air inlet opening 11, is fed to the axial input region of the impeller 2 via an air transition opening 12, which for this purpose is connected to the input region of the impeller 3 via a so-called air inlet nozzle 13.
  • the parting line 14 runs between the lower part 8 and the cover 10 of the housing part 7 just above the intermediate shaft 5, so that this and the input area of the impeller 3 or a sieve, which can cover the air transfer opening 12 are easily accessible for maintenance purposes when the cover 10 is lifted out of its connection with the lower part 8.
  • the cover 10 comprises or is designed as a sound absorber 15.
  • the wall area is preferably provided with bores 17 around the air transfer opening 12, through which and corresponding bores in the side wall of the burner housing 11 corresponding connecting screw bolts are passed.
  • the inner walls 18 of the lower part 8 of the housing part 7 are provided with the exception of the bearing area 19 for the intermediate shaft 5 or their connection to the shaft of the pump 6 with sound-absorbing material 20.
  • This can be fiber material or preferably an open-pore soft synthetic foam which is held on the inner walls 18 with the aid of lattice-shaped or perforated covers.
  • This sound-absorbing material mainly serves to dampen noise caused by the sucked-in air.
  • the cover 10 comprises a wall 23 which is opposite the air inlet opening 11 when the lower part 8 is in place, and three side walls 24 and is thus designed to be open to the side wall of the burner housing 1 or to an upper region of the air outlet opening 12.
  • FIG. 4 shows a cross section of the cover 10, which is designed as a sound absorber 15, approximately along the line IV-IV in FIG. 1, the sectional view exclusively comprising this cover 10 or sound absorber 15.
  • the sound absorber 15 comprises a core 25 made of an open-pore plastic foam, for example a flexible polyurethane foam, which is protected on its sound reinforcement sides 21 and 22 by a film laminated onto it against the ingress of moisture and dirt.
  • the sound reinforcement side 21 faces the air inlet opening 11 when the cover is in place, while the sound reinforcement side 22 faces the fan wheel 2 or the air transition opening 12. In this way, both noise caused by the sucked-in air and those coming from the interior of the burner housing 1 through the air transfer opening 12 are damped.
  • heavy layer 27 which consists of a specifically heavier plastic material than the core 25. This heavy layer is primarily used for the insulation of structure-borne noise which passes over the mechanical connections to the burner housing 1 in the direction of the housing part 7.
  • the lid 10 receives the necessary mechanical strength from an outer shell 26, which consists of a glass fiber reinforced plastic.
  • this sound absorber 15 in the form of the cover 10 takes place in such a way that the inner walls of the outer shell 28 are lined with the heavy layer 27 in such a way that a tight and mechanically firm connection is provided. This can be done, for example, by gluing a prefabricated heavy layer or by spraying it on Layer or the like happen.
  • a chemical connection is preferably sought between the inner surface of the outer shell 28 and the heavy layer 27.
  • the space then encompassed by the heavy layer 27 is foamed, so that the open-pore soft foam core 25 results.
  • the film 26 is then laminated onto its free surfaces.
  • the parting line 14 has a graduated cross section, so that a positionally secure and tight connection position can be achieved between the cover 10 and the lower part 8. Bores are made in the lower side wall areas of the outer shell 28, which serve to fix the cover 10 to the lower part 8.
  • the dashed line shown in FIG. 4, which extends across the core 25, indicates a rib which serves for mechanical stability between the upper part of the wall region 16 and the remaining region of the lower part 8, or there are corresponding recesses in the core hinted at.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Supply (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Motor Or Generator Frames (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Details Of Fluid Heaters (AREA)

Claims (9)

1. Partie affectée à l'aspiration d'air d'un boîtier destiné à un brûleur à fuel, à gaz ou à un brûleur bi-fluide, en particulier à un brûleur de grande dimension comportant une admission d'air, un orifice de passage de l'air qui est associé à la zone d'entrée axiale de la roue du ventilateur et dont le plan d'ouverture s'étend sensiblement perpendiculairement au plan de l'admission d'air, et un absorbeur des vibrations sonores qui est réalisé dans la section du boîtier faisant face à l'admission d'air, caractérisée par le fait que l'orifice de passage d'air (12) est centré sur la zone d'entrée axiale de la roue du ventilateur, par le fait que l'absorbeur des vibrations sonores (15) englobe un noyau (25) en matériau insonorisant qui présente des côtés de réception sonore (21, 22) orientés d'une part vers l'admission d'air réalisée sous forme de l'orifice (11 ) et d'autre part vers l'orifice de transmission d'air (12) et dont les surfaces situées extérieurement aux côtés de réception du son sont munies d'une couche (27) faite d'une masse de matière plastique de poids spécifique supérieur à celui du matériau du noyau, couche qui est réalisée de manière à venir s'appliquer et adhérer fermement sur les surfaces internes adjacentes de la partie de boîtier (7) et le noyau (25) étant fixé, par projection d'une mousse, dans l'espace que renferme ladite couche (27).
2. Partie d'un boîtier selon la revendication 1, caractérisée par le fait que l'absorbeur de vibrations sonores (15) est réalisé de manière à faire face à une section adjacente partielle de l'orifice de passage d'air (12).
3. Partie d'un boîtier selon la revendication 1 ou 2, caractérisée par le fait que la section (9) du boîtier présentant l'absorbeur de vibrations sonores (15) est réalisée en forme de couvercle (10) qui est fixé sur la zone restante de la partie de boîtier (16) réalisée sous la forme d'une partie inférieure (8) et qu'elle présente une coque extérieure (28) mécaniquement solide, réalisée en particulier en matière plastique renforcée de fibres de verre.
4. Partie d'un boîtier selon la revendication 3, caractérisée par le fait que la partie inférieure (8) englobe, dans une zone de paroi (16) tout l'orifice de passage (12) et par le fait qu'il est garni sur ses parois internes (18) d'un matériau insonorisant (20), matériau maintenu le cas échéant au moyen d'un revêtement grillagé ou perforé.
5. Partie d'un boîtier selon les revendications 3 ou 4, caractérisée par le fait que le joint de séparation (14) entre la partie inférieure (8) et le couvercle (10) est réalisé, vu à partir de l'orifice d'admission d'air (11) de telle manière que son parcours se trouve situé plus haut que le milieu de l'orifice de passage d'air (12).
6. Partie d'un boîtier selon l'une des revendications 1 à 5, caractérisée par le fait que le matériau insonorisant du noyau (25) est constitué d'une matière plastique poreuse, de préférence une mousse synthétique à pores ouverts, par exemple une mousse molle de polyuréthane.
7. Partie d'un boîtier selon l'une des revendications 1 à 6, caractérisée par le fait que l'absorbeur de vibrations sonores (15) est réalisé, sur ses côtés (21, 22) de réception des vibrations sonores et protégé par vitrification contre la pénétration de l'humidité et des impuretés.
8. Partie d'un boîtier selon les revendications 6 et 7, caractérisée par le fait que la vitrification est réalisée par un film (26) collé sur le noyau (25).
9. Partie d'un boîtier selon l'une des revendications 1 à 8, caractérisée par le fait que la section de boîtier (8), à savoir le couvercle (10) est de forme sensiblement rectangulaire.
EP84116049A 1983-12-27 1984-12-21 Partie d'un carter de brûleur du côté de l'aspiration d'air Expired EP0148485B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84116049T ATE34827T1 (de) 1983-12-27 1984-12-21 Luftansauggehaeuseteil eines brennergehaeuses.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3347204 1983-12-27
DE3347204A DE3347204C2 (de) 1983-12-27 1983-12-27 Luftansauggehäuse für einen Gebläsebrenner

Publications (3)

Publication Number Publication Date
EP0148485A2 EP0148485A2 (fr) 1985-07-17
EP0148485A3 EP0148485A3 (en) 1986-02-05
EP0148485B1 true EP0148485B1 (fr) 1988-06-01

Family

ID=6218231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116049A Expired EP0148485B1 (fr) 1983-12-27 1984-12-21 Partie d'un carter de brûleur du côté de l'aspiration d'air

Country Status (3)

Country Link
EP (1) EP0148485B1 (fr)
AT (1) ATE34827T1 (fr)
DE (2) DE3347204C2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10248873A1 (de) * 2002-10-18 2004-05-13 Thermamax Hochtemperaturdämmungen GmbH Dämpfungselement für einen Schalldämpfer sowie Schalldämpfer

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2187055A (en) * 1938-03-30 1940-01-16 Regnier Romeo Francis Oil burner
US2456930A (en) * 1945-01-20 1948-12-21 Gilbert & Barker Mfg Co Fan housing construction
DE1263265B (de) * 1963-05-02 1968-03-14 Jenn Air Corp Dachentluefter mit einer Schalldaemmkammer
FR1596223A (fr) * 1968-05-17 1970-06-15
US3537544A (en) * 1968-06-11 1970-11-03 Emerson Electric Co Sound absorbing grille
DE2227426A1 (de) * 1972-06-06 1973-12-20 Texaco Development Corp Oelbrenner, insbesondere haushaltsbrenner, in pistolenbrennerform
DE2555930C3 (de) * 1975-12-12 1985-05-15 Gretsch-Unitas Gmbh Baubeschlagfabrik, 7257 Ditzingen Schalldämmende Lüftungsvorrichtung
JPS52122934A (en) * 1976-04-08 1977-10-15 Tomoe Shokai Kk Burner
EP0124549B1 (fr) * 1982-10-29 1990-05-02 Joh. Vaillant GmbH u. Co. Bruleur alimente en combustible fluide
DE8308544U1 (de) * 1983-03-19 1983-11-24 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Geblaesebrenner

Also Published As

Publication number Publication date
EP0148485A3 (en) 1986-02-05
DE3471733D1 (en) 1988-07-07
ATE34827T1 (de) 1988-06-15
DE3347204A1 (de) 1985-07-11
DE3347204C2 (de) 1990-08-02
EP0148485A2 (fr) 1985-07-17

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