US3701481A - Burner plate,in particular for forced-draft oilgas or gas burners - Google Patents

Burner plate,in particular for forced-draft oilgas or gas burners Download PDF

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Publication number
US3701481A
US3701481A US159602A US3701481DA US3701481A US 3701481 A US3701481 A US 3701481A US 159602 A US159602 A US 159602A US 3701481D A US3701481D A US 3701481DA US 3701481 A US3701481 A US 3701481A
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US
United States
Prior art keywords
plate
burner
rib
blank
strip
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
US159602A
Other languages
English (en)
Inventor
Horst Reichmann
Gernot Rottmann
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.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
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 Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Application granted granted Critical
Publication of US3701481A publication Critical patent/US3701481A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F23D11/40—Mixing tubes or chambers; Burner heads
    • F23D11/402—Mixing chambers downstream of the nozzle

Definitions

  • ABSTRACT A blank to be coned into a burner plate fora forced draft burner has rows of openings extending thereacross. Strips are formed having a longitudinal rib with wings at each side of the rib. Each strip is positioned with its rib between a respective pair of p I rows of openings, and secured to the plate, with the wings/projecting outwardly over said rows to form expansion chambers. The blank with the strips thereon is then coned.
  • the invention relates, to a burner plate of conical shape constructedfrom a flat sheet metal blank of perforated plate, in particular for forced-draft oilgas (gasified oil) or. gas burners.
  • Burner plats produced from perforated sheet are knowmSuch burner plates may beflat or they may be shaped inthe'form of a spherical section or of a truncated cone.
  • a flat burnerplate has noformstability.
  • dust e.g., soot
  • The'middle zone of-a-spherical burner plate is subject to the same defects since the dust, which drops onto the said middle zone, may also clog the apertures.
  • the dust is able to slide outwardly only on the inclined parts ofthe spherical burner. plate.
  • the conical shape is better since the dust particles are able to roll off from all sides of the burner plate aperture surface.
  • Fresh air is supplied to the fuelinlforced-draft oilgas or gasburners after preheating in amixing chamber.
  • the mixing chamber is covered by a burner plate in the form of an outlet cone.
  • Sheet metal strips for forming expansion chambers cannot, however, be easily attached to a burner inlet surface of conical shape.
  • the adjacent ends of the strips in the area of the cone apex would all be positioned closely adjacent each other so that no'surface would remain for the mainflame.
  • the areas of the cone having apertures for the mainflames would be so large that part of the main flame would remain unsupported by an adhering flame.
  • the object of the invention is to provide a burner plate of conical shape, constructed from a flat sheet metal blank having sheet metal strips for forming ex-- pansion chambers so that adhering flames, uniformly distributed over the burner plate surface, may be produced.
  • this is achieved in that straight sheet metal section strips for forming the ex-' pansion chambers are placed upon the flat sheet metal blank forming the burner plate and are deformed together therewith so that adhering flames, preventing lift-off of the flame from the burner plate, are produced in uniform distribution over the surface of the conical burner plate after shaping into a cone.
  • the sectioned sheetmetal strips may be attached to the top of the burner plate. However, in view of the problem of dirt accumulation it is advantageous if the 2 sectioned sheet metal strips are positioned on the underside of the burner plate.
  • the sectioned sheet metal strips may have a rib extending longitudinally midway between two straight rows of apertures of the sheet metal blank and joined to the blank. Said strips have flat edges on both sides of the rib, with the edges being slightly inclined towards the sheet metal blank and extending over said rows of apertures.
  • the numeral 1 refers to a mixing chamber for a burner and formed from a truncated conical shell la. At its bottom this shell is attached to brackets 2 secured to a guide sleeve 3 of a gas nozzle or an oil spraying nozzle 4. At the top the mixing chamber is closed by a conical upper burner plate 8 of perforated sheet metal. Plate 8 has an apex angle which is relatively large compared to theapex angle of the truncated.
  • the lower cone la of the mixing chamber has apertures for the entry of forced air into the chamber 1. Airalso enters through an aperture 5 at the lower end of the lower cone.
  • the forced air draft is passedin known manner, not, shown, from the outside at the top downwardly along a heating shaft shell 6 of the combustion chamber 7 where the air is heated before being conducted into the mixing chamber 1.
  • the conical burner plate 8 is positioned at the bottom of a combustion chamber 7 defined by the heating shaft shell 6. .A flanged edge 8' of the burner plate 8 bears sealing-tight at 9 on the heating shaft shell 6. The mixing chamber shell la is joined at 10 to the burner plate 8.
  • Sheet metal strips 11 are spot-welded on the underside of the burner plate 8 and form expansion chambers 15.
  • the sheet metal strips 11 have a rib 12 disposed along their middle line with wings extending'outwardly at each side of the rib.
  • This rib can .be formed by embossing (roll forming) or by bending the metal in a brake. This rib bears against the burner plate 8 and is positioned between two straight rows of apertures 13.
  • the wings of the sheet metal strip 111 on both sides of the rib 12 are slightly inclined towards the burner plate and extend over the aforementioned rows of apertures 13. In this way, expansion chambers 15 are formed.
  • the fuel mixture enters into chambers 15 through. gaps 14 from the mixing chamber 1. Accordingly, the fuel mixture expands in the chamber 15 (because the inlet area is smaller than the outlet area) and emerges at 13. Adhering flames are therefore formed on the apertures 13 which prevent the adjacent main flames, supplied directly from the mixing chamber 1 and emerging from the apertures 16, from lifting off.
  • the burner plate 8 is constructed of a circular sheet metal blank 17 having a sectorshaped cut-out defined by edges 18.
  • the sheet metal blank is perforated to form openings 13 and 16 (only a few of which are shown in FIG. 4).
  • the sheet metal strips 1 l are positioned parallel to each other at identical spacings on the sheet metal blank.
  • the sheet metal blank is then formed into a cone, the edges 18 of the said cone being joined to each other by means of hard soldering.
  • the deformation of the flat blank into a cone is also accompanied by a corresponding co-deformation of the sheet metal strips 1 1. This feature, however, does not alter thefact that the adhering flames are uniformly distributed over the surface of the burner plate.
  • the sheet metal strips are so disposed that they are situated on the interior or underside of theburner plate 8. This is advantageous in view of the risk of dirt pollution. If the sheet metal strips 11 are surmounted on the outside of the burner plate 8, the fuel mixture will flow through the apertures 13 and the expansion chambers 15 and the adhering flames will emerge from the gaps 14.
  • a forced-draft burner having a mixing chamber which terminates in a burner plate of conical configuration made from a metal blank having rows of openings therethrough which is then cone bent to form the burner plate
  • said blank has a plurality of straight metal strip means extending substantially parallel to each other in juxtaposition to some of said rows of openings and forming expansion chambers between the blank and the'strip means, parts of said strip means being spaced from said blank to define gaps for the passage of fluid, said strip means beingbent along with the blank when the plate is formed.
  • each said strip has a rib projecting outwardly at one side thereof, said rib being against said plate and secured thereto, each said strip having wings extending outwardly and spaced from said plate with said spacing being greater at the rib end of the wing than at the distal end of the wing, each said wing being over a row of openings.
  • each said strip has a rib projecting outwardly at one side thereof, said rib being against said plate and secured thereto, each said strip having wings extending outwardly and spaced from said plate with said spacing being greater at the rib end of the wing than at the distal, end of the wing, each said wing being over a row of openings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
US159602A 1970-09-14 1971-07-06 Burner plate,in particular for forced-draft oilgas or gas burners Expired - Lifetime US3701481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT828870A AT297996B (de) 1970-09-14 1970-09-14 Brennerplatte, insbesondere für Ölgas- oder Gas-Gebläsebrenner

Publications (1)

Publication Number Publication Date
US3701481A true US3701481A (en) 1972-10-31

Family

ID=3604117

Family Applications (1)

Application Number Title Priority Date Filing Date
US159602A Expired - Lifetime US3701481A (en) 1970-09-14 1971-07-06 Burner plate,in particular for forced-draft oilgas or gas burners

Country Status (6)

Country Link
US (1) US3701481A (nl)
AT (1) AT297996B (nl)
BE (1) BE771960A (nl)
FR (1) FR2107328A5 (nl)
GB (1) GB1298185A (nl)
NL (1) NL157706B (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015047748A1 (en) * 2013-09-26 2015-04-02 Rheem Manufacturing Company Fuel/air mixture and combustion apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015047748A1 (en) * 2013-09-26 2015-04-02 Rheem Manufacturing Company Fuel/air mixture and combustion apparatus
CN105745495A (zh) * 2013-09-26 2016-07-06 里姆制造公司 燃料/空气混合和燃烧装置
US9739483B2 (en) 2013-09-26 2017-08-22 Rheem Manufacturing Company Fuel/air mixture and combustion apparatus and associated methods for use in a fuel-fired heating apparatus
AU2014328025B2 (en) * 2013-09-26 2017-08-31 Rheem Manufacturing Company Fuel/air mixture and combustion apparatus
US9951945B2 (en) 2013-09-26 2018-04-24 Rheem Manufacturing Company Diffuser plate for premixed burner box
CN105745495B (zh) * 2013-09-26 2019-11-05 里姆制造公司 燃料/空气混合和燃烧装置
US10571122B2 (en) 2013-09-26 2020-02-25 Rheem Manufacturing Company Fuel/air mixture and combustion apparatus and associated methods for use in a fuel-fired heating apparatus
US10976048B2 (en) 2013-09-26 2021-04-13 Rheem Manufacturing Company Diffuser plate for premixed burner box
US11402093B2 (en) 2013-09-26 2022-08-02 Rheem Manufacturing Company Fuel/air mixture and combustion apparatus and associated methods for use in a fuel-fired heating apparatus

Also Published As

Publication number Publication date
NL157706B (nl) 1978-08-15
AT297996B (de) 1972-04-25
FR2107328A5 (nl) 1972-05-05
GB1298185A (en) 1972-11-29
DE2115521A1 (nl) 1972-06-15
BE771960A (fr) 1971-12-31
DE2115521B2 (de) 1975-07-10
NL7109276A (nl) 1972-03-16

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