US1687114A - Oil burner - Google Patents

Description

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G. D. suNDs'rRAND OIL BURNER Filed May 19, 1924 Oct. 9, 1928.

y and fuel out of the combustion chamber be against defiecting bafiles.

Patentedy Oct. 9, 1928,.

Gus'ru DAVID sUNDsTRND, or nocxroan, ILLINoIaAssIGNon, BY :wenn AssIGN- l 11,637,114 PATENT OFFICE.

MENTS, TO SUNDSTRAND ENGINEERING COMPANY, OF BOCKFORD, ILLINOIS, A

CORPORATION OF ILLINOIS.

lApplication led May '19,

This invention has reference to oil-burning apparatus of the type used in heating. dwell'- ings, apartment houses, factories, etc., an relates particularly to the construction of the parts located within the furnace.

Ordinarily oil burners having `a combustion bowl and a forced air supply'thereto introduce the air at a considerable velocity High velocity in burners is undesirable since it tends to create Vnoise and to carry, the ail fore completion of combustion.

It is the object of this invention to provide a means and method of mixing fuel with a forced air supply to assure a quiet and `efiicient combustion. l

It is anotherobject of this inventioni to provide a structure dividing and distributing the supplied air in a manner to-avoid high velocities.

Another object is to provide a combustion bowl having a central supply of air thereinto Another object of the invention is the provision of a series of spaced conical frustumsv4 disposed in the ath of the entering lair as the deflecting ba es. f p

Still another object is the provision of a fuel nozzle arranged to j spray fuel against` the air leaving the bowl.

In the drawings there is illustrated a structure embodying the invention, Figure 1 representing the mechanism which is located outside Athe furnace, and y Fig. 2 illustrating the parts located within the furnace. Fig. 3 is an enlarged cross-sec-v tion of one of the baies along the line 3-3 of Fig. 2..

In the drawings an air blower is provided comprising a casing 5 and a fan 6. The blower is associated with suitable mechanism for controlling the air and fuel supplies, such mechanism forming no part of this invention. A conduit 7 leads from the blower to the burner bowl shown in Fig. 2. In the present instance the bowl 8 is shown as being circular in form and is horizontally dis posed. The bowl is supported upon an elbow 9 which is part of and the termination of the conduit 7. Suitable legs 10 support the elbow when required. The top of the elbow 9 has a circular opening, 1n the present instance slightly enlarged over the normal diameter, t thereby forming the shoulder 11 and annular on. summit.l

1924. Serial No. 714,212.

annular fiange 13 for admission of the air.

Inside the bowl a ring 15 is shown about the bottom opening. The bottom 14 slopes slightly upwardly and terminates in a cylindrical wall y16. In the bottom of the elbow 9a depression 17 is formed defining a chamber 1-8. Y From this-chamber extends a pipe 20 for draining oil from the burner in case of continued supply when there is no combustion. l

In the casingy of the elbow 9 there is supported a vertical stem 21 axially alined with the center of the bowl and the bowl-end of the elbow. .For this purpose a supporting v socket 22 is cast into the lelbow to insure a rigid vertical support of the stem 21. The upper end of the stem has a plurality of baflies thereon arranged to cover completely the air-opening in the bottom of the bowl. Y

The .bafiies are disposed so as to deflect the air entering vertically to ay substantially horizontal path. lAnd furthermore -a plurality of bafiies is-provided and arranged to divide the single stream of entering airinto a number of streams orhorizontal radial sheets of air.

The bafl'les of the drawing are shown as being four in number as 23, 24, 25 and 26. Each baffle is a frustum `of a conical ,shell and each is supported by the rod 21 lying in the cone axis. The lowerm'ost frustum 23 is the larger, and each frustum in succession has its lower base overhanging the upper end or ba/se of the frustum beneath it and vertically spaced above it. For example the frustum 23 has the upper end 27 disposed below the lower base 28 of the baille 24, forming the horizontal space 29 therebetween from which may issue asheet of air. Each of the baffles 23, 24 and 25 is open at its upper and lower ends. A. spider 30 (Fig. 3) is formed in each one and is provided with a central member-31 for support by a shoulder or reduced portion 32 of the stemV 21. The topmost baille 26 has a closed upper end 33 to serve as a cap forthe series and is supported on the end of the stem 21.

In Fig. 2 a nozzle 34 is shown located in line with the stem 21 and spaced above the bafiies. Oil or a mixture of oil and air is sprayed from the nozzle in a path generally indicated by numeral 35. The bowl of the drawings is inimpinge on the side wall 16. At the walll the air naturally becomes deflected upwardly thereby tending to form a cylindrical shell or envelope above the bowl. But one sheet of air and part of a second are emitted in a. line above the wall 16. These sheets being weaker in force because of the smaller diameter of the upper baliles, likewise merge into a horizontal current which tends to spread out the cylinder of air from the lower baffles, thereby enlarging it to till the space above and laterally outside ot the bowl. The oil being sprayed into the'path of the air is carried by the laterally traveling sheets, whereby it is well distributed throughout the iurnace'to cause a ecient and complete combustion.

While the above type of bowl and bellies produces a mixture of air and fuel in the manner and of the type described, it is within the scope of this invention, as defined in the appended claims, to'provide other structures to accomplish the same purpose according to the principles above set forth.

I claim as my invention:

l: An oil burner having, in combination, an air blower, a burner bowl, an air conduit from aca-mia the blower to the bowl, said conduit entering the bowl axially thereof, a plurality of spaced.

creasing in size away from said opening, the

lower base of one frustum being larger than the upper base of the next. lower frustum, the

uppermost frustum having an imperforate' upper end, supporting m'eans'for said frustums, and a fuel nozzle disposed above said frustums.

2. An oil burner having, in combination, a forced air supply, a burner bowl, an air conduit entering said bowl axially thereof and connected to said air supply, a plurality of spaced overlying conical shell frustums covering the opening of saidconduit, said frustums decreasing in size away from the opening, a cap 4for said frustums, and a fuel nozzle disposed above said cap.

3. A fuel burner having, in combination, a bowl, a supporting elbow therefor, a forced air supply, a conduit therefor, said elbow being in the conduit to carry theair, the bowl having an annular bottom with its opening in register with the elbow opening, ay stem supported axially of said opening, a plurality of cone frustums carried by said stem, and a fuel nozzie-disposed, above said frustums.

ln testimony whereof, Il have hereunto at,

lixed my signature.

GUSTAFDAVID SUNDSTRAND.

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