US2017697A - Oil burner - Google Patents

Description

Oct. 15, 1935. J. J. JORGENSEN OIL BURNER Filed Dec. 31, 1932 2 Sheets-Sheet 2 INVENTOR Patented Oct. 15, 1935 PATENT OFFIQE OIL BURNER Julius J. Jorgensen, Detroit, Mich., assignor to Kelvinator Corporation, Detroit, Mich., a corporation of Michigan Application December 31, 1932, Serial No. 649,699 r Claims.

The present invention relates to oil burners and more particularly to oil burners for household heating plants.

One of the objects of the present invention is to provide a rotating fuel distributing well to deliver the fuel from the well to the point of mixture with the air by radially extending fuel feed channels.

Another object of the invention is to arrange fan blades alongside of the fuel feed channels for causing the air to be distributed equally at the points of outlet of the fuel feeding channels.

Other and. further objects and advantages will be apparent from the following disclosure, reference being had to the accompanying drawings wherein a preferred form of embodiment of the present invention is clearly shown:

In the drawings:

Figure 1 is a side view of the improved burner, parts thereof being shown in longitudinal cross section;

Fig. 2 is a sectional View taken on line 2-2 of Fig. 3 and showing the rotary fuel feeding mechanism removed from the oil burner casing;

Fig. 3 is a side view of said mechanism looking in the direction of arrows on line 3-3 of Fig. 2;

Fig. 4 is a View partly in section, the section being taken on line 4-4 of Fig. 3.

Referring to the drawings, there is shown a base 26 which is supported for swinging movement on a post 2|. This post may be carried by any suitable bracket not shown. The base 26 supports an elmtric motor 23 which drives a shaft 24. Formed integrally with the base 20 is a cylindrical casing 25, the left end of which is provided with a flange 26. A sheet of fire-resisting material such as asbestos 2'! is attached to the right of the flange 26 by screws 28. The casing 25 is intended to be inserted into the fire box of a furnace and preferably through the fuel feeding door opening therein and the asbestos 2? is arranged to close this opening in the furnace. The inner end of the casing 25 is flared outwardly as at 36 and an annular band 3! of sheet metal is secured at this end of the casing 25 by screws 32. This band carries therein a heating ring 35. This heating ring is carried by the screws 35 and the diameter thereof is slightly less than the interior diameter of the band 3! so as to leave a space as at 36. A disc 3! is carried at the end of the casing 25 by screws 38 and is provided with a series of reverse bends so as to form a groove 39 for the screws 38 and form a housing All. A gas pipe (not shown) is connected with the interior of the housing 46 and the disc is provided with a series of small orifices 4! for the escape of the gas between the band 3! and the ring 34. This gas, when lighted, will cause the heating of the ring 34 for preheating purposes.

A frame 42 is disposed within the casing 25 and held in position by screws 43. This frame 42 provides two bearing supports, one of which is shown at 45 for journaling the shaft 46. This shaft 56 is driven by the motor shaft 24. The

inner end of the frame 42 is flared outwardly as 5 at 48 and the upper end of this flare 48 carries a tube type nozzle 49. Fuel is supplied to the nozzle 49 from a casing 50 by a pipe 5!. The fuel may be conveyed to the casing 50 and the quantity of fuel delivered thereto may be controlled in any suitable manner. Preferably, the quantity of fuel delivered thereto is controlled by a room thermostat (not shown).

Referring particularly to Fig. 2, it will be noted that the shaft d6 is hollow and a spider 54 is connected therewith by screw threaded engagement. In the present instance, this spider is provided with three legs 55. A member 51 is driven by the spider 5d. The member includes a disc-shaped ring as. Ring 56 is connected at the extreme ends of the legs 55 of spider 54 by rivets 58. At the inner portion of the ring 56 the member 51 is provided with a series of reverse bends to provide a circular-shaped well '60. From the well 66, the member 51 merges into a frusto conically shaped portion BI and a cylindrical portion 62. The outer end of the cylindrical portion 62 is guided by three posts 63. These posts are riveted to the shaft 46, there being openings 64 in the shaft in which a riveting tool may be inserted. The outer ends of these posts slidably and frictionally engage the interior of the cylindrical portion 62 so as to maintain said portion in its proper position while permitting longitudinal expansion thereof. is a series of tubes 66 and in the present embodiment, three of these tubes 66 'are shown. It will be noted that the tubes 66 are spaced a slight distance from the disc-shaped ring 56. Holes 61 are provided in the well in alinement with the tubes go 66 so that fuel may flow from the well 60 into the tubes 66.

Bosses 10 are provided on the spider legs 55 and carry a saucer shaped disc H, held in place by screws i2. Two sheet metal bells M and 15 are spaced from one another as at T6 and the flange portions thereof are secured to the disc H by screws H. A sheet of asbestos 79 lies flat'alongside the disc H and is interposed between the bell i l and the disc H and is held in place by being clamped between the disc 14 and the disc I i.

A plurality of fan blades 86 are suitably secured to the disc ll and extend toward the ring 56. It will be noted in Fig. 4 that the tubes 66 extend between these fan blades.

Since the spider 54 is carried by the rotating shaft 46, it will cause rotation of the ring 56, distributing well 60, conically shaped member 6|, disc-s H, 74 and I5 and likewise the fan blades 80. 0

Extending outwardly from the well 35- bracket '26.

It will be noted that the nozzle 49 extends to within a short distance of the conically shaped member 5 3, whereby the rotating conical member 6| will wipe the fuel off of the nozzle 49. fuel will travel outwardly on the conically shaped member 5! due to centrifugal force and enter the well 61!, whence it will flow through the tubes 66 and will be sprayed in the form of vapor against the interior of the hot ring 34.

Air for supporting combustion of the vapor, which is thrown by centrifugal force from the outer ends of the tubes 55, is supplied by a fan driven by the shaft 24. An opening .85 is provided in the frame 42 for permitting the .air to fiow from the interior of the casing to the interior of theframe, whence it is delivered to the interior of the cylindrical portion 52. This air is then forced between the disc-shaped ring 56 and the disc .i i. I have found that by providing a plurality .aof fan blades 89 interposed between the discs 56 and ll, that a uniform discharge of air is maintained over the entire circumference of the'ring 56 and disc ll. Also, the air is directed over the tubes 56 and toward the ring 34 in the proper manner and thereby .mai'ntains a uniform flow of air about all the tubes to insure uniform atomization of the fuel and thereby insure a uniform ring of combustion.

A damper 88 is provided at the opening 86 in the frame '42 for the purpose of controlling the quantity of air delivered and this damper may be controlled thermostatically orin any suitable manner.

'Onthe upper end of the casing .25 are formed 1 bosses 89 which carry a shroud 88 which substantially surrounds the upper half of the casing 25 and forms a passage 92. The inner end of the casing 25 is open .at 93 to the interior of the passage 92 and an opening 94 is arranged in the The purpose of the passage 92 and the openings 93 and '94 is to permit air, which is forced by the fan 85 through the casing'25, to flow over the moving parts, within the interior of the casing, and escape through theopening Bite the xterior of the furnace whereby'to cool the working parts within the hot furnace.

I have found that by providing tubes 6% as herein shown, and by causing a uniform distribution of air that substantially no carbon deposits on the ring 34 nor within the tubes 66. The space between the bell discs 74 and i5 and the asbestos I9 maintains a relatively high differential in temperature between the exterior of the bell T5 and the disc 3 l. However, due to the fact that the disc I! is within'the interior of the furnace and subject to the heat thereof, there is a tendency for the same to buckle, due to expansion. In "order to prevent such buckling as would distort the same, I have provided two series of slots 96 and '91. There are three slots in each of these series, and the slots in series 96 are'staggered with respect to the slots in series 91. This arrangement permits a large expansion and contraction of the disc H without causing the same to buckle out of shape.

' While the form of embodiment of the present invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, .all coming within the scope of the claims which follow.

What I claim as my invention is:

This

1. In a fuel burner for a heating system, the combination with a rotatable frusto conically shaped fuel delivering means, of a rotatable fuel distributing well lying radially outwardly of said fuel delivering means and in fuel receiving rela- 5 tion with the exterior surface of said means, rotatable means providing radially extending fuel feeding channels communicating with the distributing well for receiving fuel therefrom and for distributing such fuel radially, means for rotating 10 said elements, and means for feeding fuel to the exterior surface of the fuel delivering means.

2; In a fuel burner for a heating system, the combination with a rotatable frusto-conically shaped fuel delivering means, of a rotatable fuel 15 'distributingwell lying radially outwardly of said ,shaped ring forming a fuel distributing well, said well lying radially outwardly of said fuel deliver- 30 ing means and in fuel receiving relation with the exterior surface of said means, a plurality of radially extending tubes carried by and adjacent the disc-shaped ring in fuel receiving'relation with the well for receiving fuel therefrom and for distributing such fuel radially, means for rotating said elements, means for feeding fuel to the exterior surface of the fuel delivering means, and means for forcing air for combustion alongside the disc-shaped ring'about the tubes.

4. In a fuel burner for a heating system, the combination of a rotatable fuel feeding member comprising a substantially frusto conically shaped portion having a fuel distributing well formed around the edge of its larger end in fuel receiving 45 relation with the exterior surface of said conically shaped portion, said member also comprising a disc shaped ring extending radially from said well; means for rotating said member; means for feeding fuel to the exterior surface of the fuel feeding member; and a plurality of tubes connected with the well and receiving fuel therefrom, said tubes extending alongside said discshaped ring, and means for forcing air for combustion alongside the disc-shaped ring about the 55 tubes.

5. In a fuel burner for a heating system, the combination with a rotatable frusto conically shaped fuel feeding means, of a rotatable fuel distributing well lying radially outwardly of the base 60 of said fuel feeding means and in fuel receiving relation with the exterior surface of said means, rotatable means providing radially extending fuel feeding channels communicating with the distributing well for receiving fuel therefrom and 05 for distributing such fuel radially, means for rotating said elements, and adjacent means directed toward the exterior surface of said frusto conically shaped fuel feeding means for delivering fuel thereto.

JULIUS J. JORGENSEN.

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