US3508852A - Oil burner - Google Patents

Oil burner Download PDF

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Publication number
US3508852A
US3508852A US695215A US3508852DA US3508852A US 3508852 A US3508852 A US 3508852A US 695215 A US695215 A US 695215A US 3508852D A US3508852D A US 3508852DA US 3508852 A US3508852 A US 3508852A
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United States
Prior art keywords
fuel
burner
cup
air
cover
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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
US695215A
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English (en)
Inventor
Avinoam Hourwitz
Boleslaw Houchman
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Individual
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Individual
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Publication date
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Publication of US3508852A publication Critical patent/US3508852A/en
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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
    • F23D11/04—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying action being obtained by centrifugal action
    • F23D11/08—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying action being obtained by centrifugal action using a vertical shaft

Definitions

  • a burner comprising a chamber in which is disposed a rotary cup mounted on a hollow rotating shaft through which supply fuel is delivered to the cup and ejected therefrom in atomized form, the ejected fuel being vapourized in a first region of the chamber and ignited in a second region thereof, a fan for aspiring air to be mixed with the vapourized fuel, a cover spaced above the rotary cup, and a fixed body in the form of a conical plate surrounding and spaced outwardly from the rotary cup and cover, the plate being located in the trajectory of the ejected fuel and having air passages for the aspired air disposed in the second region of the chamber.
  • the present invention relates to 'a burner unit of the type in which the fuel is atomized by ejection from a rotary cup.
  • Burners comprising a chamber in which is disposed a rotary cup mounted on a hollow rotating shaft through which supply fuel is delivered to the cup and ejected therefrom in atomized form, the ejected fuel being vapourized in a first region of the chamber and ignited in a second region thereof, and a fan for aspiring air to be mixed with the vapourized fuel.
  • a fan for aspiring air to be mixed with the vapourized fuel.
  • Objects of the present invention are to provide improvements in one or more of the above respects in a burner unit of the rotary cup type.
  • the burner of the foregoing type includes a cover spaced above the rotary cup, and a body surrounding and spaced outwardly from the rotary cup and the cover.
  • This body is located in the trajectory of the ejected fuel and has air openings in the path of the aspired air.
  • the body is spaced at such distance from the rotary cup that the air openings are located in the second region (i.e. where the fuel is ignited) of the chamber and also in the trajectory of the ejected fuel, whereby freshly arrived vapourized fuel is ignited immediately upon meeting the air in the vicinity of said air openings.
  • the burner may include a conduit for introducing start-up fuel to the ignition device before the supply fuel arrives at the rotating cup, the flow of the start-up fuel being discontinued after the supply fuel is ignited.
  • FIGS. 1 and 2 show in elevational section two forms of a burner unit according to the invention;
  • FIG 3 schematically shows the circuit that may be used for the unit of FIG. 2; and
  • FIG. 4 shows a modification of the burner unit.
  • the burner unit illustrated in FIG. 1 comprises a supporting casing 1 merging into a superposed sleeve part 2.
  • Casing 1 comprises a core 3 supporting an electric resistor 4 coiled on a refractory support and serving as the ignitor.
  • a hollow shaft 7 whose lower portion is connected to an electric driving motor (not shown) passes through bores 5 and 6 in the bottom of the casing and the core, respectively. The lower end of shaft 7 is connected to a fuel supply.
  • a fan 8 rotatable within a hollow space 9 of easing 1 and serving for the aspiration of air through a plurality of bores 10 provided in the bottom of casing 1, the aspired air being delivered through ducts 12 for admixture with the fuel.
  • a rotary cup 14 Mounted on the upper, delivery end of shaft 7 and in chamber 13 of the burner is a rotary cup 14 which is covered from above by means of a tray-shaped cover 15 supported by a ring 16 resting on stays 17.
  • the aggregate 15, 16, 17 is surrounded by a fixed annular or conical plate or bowl 18.
  • the wall of bowl 18 is inclined so as to be in the trajectory of the fuel ejected from cup 14 and is formed with a plurality of openings or vents 19 arranged in a circular array around cup 14 and cover 15 and also in the trajectory of the ejected fuel. Each vent 19 is surrounded by a rim 20.
  • Bowl 18 rests on a sleeve 21, there being an annular free space 22 between sleeve 21 and heater 4 merging below into a space 23 of increased diameter.
  • a duct 24 from space 23 is connected to a tube 25 and serves as a return to the fuel supply of any non-burnt fuel.
  • a deflector 26 On the flame producing side of bowl 18 is mounted a deflector 26 for the concentration and direction of the blast flame.
  • the operation of the burner unit is as follows: When shaft 7, fan 8, and rotary cup 14 rotate, fuel is delivered from the fuel tank through the shaft to the rotary cup 14 and is ejected into chamber 13 in atomized form. At the same time the rotation of fan 8 causes air to flow through ducts 10, ducts 12 and openings 19.
  • the vapourized fuel delivered from region 13 impinges on the surface of bowl 18 in the vicinity of openings 19.
  • the location of bowl 18 is such that openings 19 are located in chamber region 13 where the temperature is sufiiciently high to sustain combustion of the freshly arriving vapourized fuel.
  • the latter is therefore ignited as soon as it meets the air passing through the openings. Because this ignition occurs simultaneously with the meeting of the vapourized fuel and air, a soot-free silent blue flame is produced.
  • any non-vapourized fuel that there may be is returned to the tank and does not participate in the combustion, this also contributes to the soot-free, blue character of the flame.
  • the current to the ignitor resistance is switched on a short time before the fuel arrives at the cup.
  • the resistor is already hot and glowing. It was found that the fuel which remained in the vicinity of the cup on the metal parts of the burner at the time the resistor coil was ignited sometimes caused a small explosion, or a smouldering of the fuel, which gave rise to an especially loud noise, and/or an ejection of smoke from the burner.
  • FIG. 2 An oil conduit 30 is provided, terminating in a spout 31 overlying the ignitor resistor 32, which in this case is positioned eccentrically in relation to the rotating shaft 7 of the burner.
  • a concentric resistor such as resistor 4 in FIG. 1, could of course also be used.
  • the deflector 26 is omitted, but the remaining parts are the same as in FIG. 1 and therefore have been referred to by the same reference numerals.
  • the electrical wiring for operating the burner of FIG. 2 is schematically illustrated in FIG. 3. It includes a switch 35 which permits the flow of current to the ignitor resistance (4 or 32).
  • the motor M for driving shaft 7 and the pump P for supplying the starting fuel through conduit 30 are controlled through a time-delay device TD (eg a slow-acting relay) such that: the ignitor resistor is first heated; a short time thereafter the starting fuel is pumped through conduit 30 so as to drip onto the glowing heater and to ignite; and then a short time thereafter the supply fuel arrives at the rotating cup 14 and is vapourized and ignited in the manner described earlier.
  • TD time-delay device
  • a control switch 36 may be operated in a known manner, e.g. after a predetermined time delay, or in response to the air pressure created by the fan or the burner. Instead of pumping the starting fuel by a pump, it may be gravity-fed and controlled by a valve.
  • a burner comprising a chamber in which is disposed a rotary cup mounted on a hollow rotating shaft through which supply fuel is delivered to the cup and ejected therefrom in atomized form, the ejected fuel being vaporized in a first region of the chamber and ignited ina second region thereof, and a fan for aspiring air to be mixed with the vaporized fuel, characterized in that said burner includes a cover spaced above the rotary cup, and a fixed annular body surrounding and spaced outwardly from the rotary cup, said fixed annular body having a wall inclined with respect to the rotary cup and being formed with a circular array of openings for the aspired air surrounding said cup and cover, the said annular body and the circular array of air openings therein being located in the trajectory of the ejected fuel and in said second region of the chamber whereby freshly arriving vaporized fuel is ignited immediately upon meeting the air passing through said air openings.
  • each air opening is surrounded on the flame producing side of said body with a rim adapted to prevent the dripping of any non-vaporized fuel through the opening.
  • a burner as defined in claim I wherein said cover is fixed to said rotary cup so as to rotate therewith.
  • a burner as defined in claim 1 further including a start-up ignition device, a conduit for introducing startup fuel to said ignition device before the supply fuel arrives at the rotating cup, and means for discontinuing the flow of the start-up fuel after the supply fuel is ignited.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Spray-Type Burners (AREA)
  • Agricultural Machines (AREA)
  • Wick-Type Burners And Burners With Porous Materials (AREA)
US695215A 1967-01-04 1968-01-02 Oil burner Expired - Lifetime US3508852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL2721667 1967-01-04

Publications (1)

Publication Number Publication Date
US3508852A true US3508852A (en) 1970-04-28

Family

ID=11044085

Family Applications (1)

Application Number Title Priority Date Filing Date
US695215A Expired - Lifetime US3508852A (en) 1967-01-04 1968-01-02 Oil burner

Country Status (10)

Country Link
US (1) US3508852A (xx)
AT (1) AT287895B (xx)
BE (1) BE708948A (xx)
CH (1) CH459437A (xx)
DE (1) DE1601267A1 (xx)
DK (1) DK116080B (xx)
ES (1) ES349261A1 (xx)
FR (1) FR1549916A (xx)
NL (1) NL6800066A (xx)
NO (1) NO117255B (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623664A (en) * 1969-02-05 1971-11-30 Ishikawajima Harima Heavy Ind Rotary-type oil burner
US4803932A (en) * 1978-07-31 1989-02-14 Ab Scaniainventor Burner for a suspension of fine-grained coal in liquid
US20040214122A1 (en) * 2002-10-15 2004-10-28 Simonds Edward L. Combustion heater

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US396525A (en) * 1889-01-22 Oil-burner
US855688A (en) * 1897-12-03 1907-06-04 Blubaugh Burner Company Oil-burner.
US1497829A (en) * 1922-07-01 1924-06-17 Herman J Allen Oil burner
US1544208A (en) * 1924-03-26 1925-06-30 Ashley C Bennett Oil burner
US1695030A (en) * 1926-05-10 1928-12-11 Jr John Scheminger Rotary oil burner
US2374290A (en) * 1942-02-12 1945-04-24 Goetaverken Ab Adjustable liquid fuel burner
US2507006A (en) * 1947-05-07 1950-05-09 Eureka Williams Corp Oil burner of the spinner type
CA644522A (en) * 1962-07-10 Brola Gabriel Bruleur a chambre de combustion rotative

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US396525A (en) * 1889-01-22 Oil-burner
CA644522A (en) * 1962-07-10 Brola Gabriel Bruleur a chambre de combustion rotative
US855688A (en) * 1897-12-03 1907-06-04 Blubaugh Burner Company Oil-burner.
US1497829A (en) * 1922-07-01 1924-06-17 Herman J Allen Oil burner
US1544208A (en) * 1924-03-26 1925-06-30 Ashley C Bennett Oil burner
US1695030A (en) * 1926-05-10 1928-12-11 Jr John Scheminger Rotary oil burner
US2374290A (en) * 1942-02-12 1945-04-24 Goetaverken Ab Adjustable liquid fuel burner
US2507006A (en) * 1947-05-07 1950-05-09 Eureka Williams Corp Oil burner of the spinner type

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623664A (en) * 1969-02-05 1971-11-30 Ishikawajima Harima Heavy Ind Rotary-type oil burner
US4803932A (en) * 1978-07-31 1989-02-14 Ab Scaniainventor Burner for a suspension of fine-grained coal in liquid
US20040214122A1 (en) * 2002-10-15 2004-10-28 Simonds Edward L. Combustion heater
US6881056B2 (en) * 2002-10-15 2005-04-19 Thermal Dynamics, Inc. Combustion heater

Also Published As

Publication number Publication date
ES349261A1 (es) 1969-04-01
DE1601267A1 (de) 1970-12-10
BE708948A (xx) 1968-05-16
AT287895B (de) 1971-02-10
FR1549916A (xx) 1968-12-13
NL6800066A (xx) 1968-07-05
NO117255B (xx) 1969-07-21
DK116080B (da) 1969-12-08
CH459437A (de) 1968-07-15

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