US1433159A - Rotary oil burner - Google Patents

Description

I. .M. SHARP- ROTARY QH. BURNER.

APPLICATION FILED APR. 16, 1919.

Patented Oct. 24, 1922.

INVENTOR ATTORNEYS 21a F pr Ll affa- ISAAC M. SHARE, 0]? SAN FRANCISCO, CALIFORNIA.

ROTARY OIL implication filedl April 16,

To all whom it may concern Be it known that l, Issac M. SHARP, a citizen of the United States, residing at the city and county of San Francisco and ti State of California, have invented new and useful Improvements in Rotary Oil Burners, of which the following is a specification.

This invention relates to an oil burner and particularly to a burner of the rotary is type in which the oil is atomized and projected by means of centrifugal force.

One of the objects of'the present invention is to provide a simple, substantial and cheaply manufactured oil" burner of the roi5 tary type, in which the oil is atomized and projected into the furnace by means of centrifugal force and in conjunctiontherewith to provide means for introducing a sufiicient volume of air to support combustion.

Another object of the invention is to pro vide a novel form of atomizing head, means for delivering oil thereto, and means for Ohtaining an even distribution of the oil within the head before it is centrifugally discharged.

Another object of the invention is to provide means actuated by the incoming air for transmitting a rotary movement to the atomizing head and also to provide means for by-passing a sufficient volume of air through the atomizing head to prevent overheating of the same.

Further objects will hereinafter appear. The invention consists of the arts and the construction, combination an arrangement of parts as hereinafter more fully" described and claimed, having reference to the accompanying drawings, in which- Fig. 1 is a longitudinal vertical section so through the burner.

Fig. 2 is a cross-section'on line 2-42, Fig. 1. Referring to the drawings in detail, A indicates a cylindrical shaped casing, in one of which is adjustably mounted a nozzle 2. This nozzle is threaded, as at 3, and turning movement of the nozzle will. therefore permit longitudinal adjustment of the same with relation to casing A and the atomizing head gener: indicated at B, as "will hereinafterbe described. The opposite of the casing is closed. oy means of a This head member is in head member his instance provided for two purposes; t, that or supporting a bearing g and secondly, that supporting onnection 6 through which th oil to be 191a Eerialito. asoses.

is admitted. The bearing member 5 is screwed into the head 4, as shown at 7. It may, however, be constructed integral with the casing, if desired. Formed in the outer 60 end of the bearing member is a central chamber 8 and mounted within said chamber are a pair of ball bearings 9 in which is journaled a hollow shaft 10. Extending through the hollow shaft and supported by the bearing member is a stationary fuel delivering pipe 11. This pipe is threaded and is screwed into the bearing member, as at p 12. The pipe communicates with the main delivery pipe 6, through means of a passage 13 formed in the bearing member and it serves the function of delivering the oil to the centrifugal atomizer B.

Suitably secured on the outer end of the hollow shaft is a head member 14 in which is formed a plurality of longitudinally disposed o enings 15 and a plurality of radially dispose openings 16. Formed on the outer end of the head is a threaded extension 17 on which is secured a cap plate 18. Suit- 8 ably secured exterior of the head member 1a is a cup-shaped atomizer 19, which is provided with an annular discharge lip 20. Formed between the head member by means of the threaded extension 17 and the cap plate 18 is a central chamber 21, into which the stationary oil delivering pipe 11 projects. Secured on the outer end of said pipe and within the chamber 23. are a pair of inverted cap members 22 and. 23 and formed 1' between said caps are a plurality of radially disposed openings 24 through which the oil is permitted to discharge. The cap 23 larger in diameter than the inner cap 22, thus permitting the larger cap to partly enclose the inner cap. This is of considerable importance as the oil discharging through the radial openings 24 is thereby projecting downwardly into the bottom portion of chamber 21 where it is permitted to di charge into the cup 19 through the openings 16. The caps 22 and 23 are or further importance as they prevent the oil dnehsrgmg from striking the plate 1 '22." not.

which is often so hot during the oper.

of the burner that carbon rnig t be for By referring to 1, it wii the outer end of the nozzle 2 is l tiered, as at 25; also, that th of the ato importance as it serves the function of a seat. with relation to which the discharge end 25 of the nozzle may be adjusted thereby controlling the volume of air discharging between the atomizing cup and the nozzle.

Secured on the hollow shaft 10 or formed integral therewith, is a spiral-shaped vane 27 and forming a connection with one end of the casing a is a pipe 28 to which air is delivered by means of a blower or the like, not here shown. Air delivered in this manner has comparatively small pressure but it travels at great velocity. It will therefore pass forwardly through the casing a and through the discharge nozzle 2, being finally permitted to discharge through the annular opening 30 formed between the nozzle end 25 and the flange 20 of the atomizing cup, the air being here directed at right angles or radially with relation to the cup. The air during its passage through the nozzle, engages the inclined face presented by the spiral-shaped vane 27. A rotary movement is in this manner imparted to the hollow shaft and the centrifugal atomizer carried thereby and it will therefore atomize the oil delivered to the cup and also project the same. The number of revolutions obtained in this manner depends entirely upon the velocity of the air and the incline or pitch of the spiral-shaped vane. It should, however, in all instances, approximate or preferably exceed 2000 revolutions per minute. In actual operation, it is found that the oil delivered to the interior chamber 21 is discharged radially through the opening 16 into the bottom of the cup and here spreads out in a thin film over the interior wall of the cup and as this wall is inclined, it can readily be seen that it Will travel outwardly to the lip 20 and will then be projected as a thin annular sheet of vapor. This vapor mixes with the air discharging from the nozzle end 25 and a homogeneous combustible mixture is in this manner produced. The flow of the air is in this instance divided as a considerable portion of'the same is permitted to enter the cup through the longitudinal openings 15 formed in the head. This air discharges through the annular opening 31 formed between the cap plate and the lip of the cup, thus discharging air also on the forward side of the projected oil vapor. In other words, air is delivered to both sides of the highly vaporized oil and is therefore permitted to intimately mix with the same before combustion takes place. The flame produced in the present instance is circular in formation and may be spread over a considerable area, the size of the flame being controlled to a great extent by the volume of oil delivered.

The air passing through the centrifugal atormzer promotes combustion, due to the fact that it permits a more intimate mixture resales of the air and oil and it also serves the function of preventing carbonization of the oil within the head as it retains the head sufficiently cool to prevent carbonization. The air passing through the nozzle 2 also serves two functions; first,-that of rotating the centrifugal atomizer; and secondly, that of supplying a sufficient quantity of air to support combustion. The air passing through the nozzle also serves another function, to-wit, that of maintaining the main bearing and the shaft supported by the same, cool, thus preventingoverheating of the same and similarly, reducing lubricating troubles.

A burner constructed, as here shown, is simple and substantial in construction and may be regularly applied to practically any type of furnace. It is, however, preferably designed to assume a vertical osition when in operation and may, therefore, be in-' serted directly through the bottom of a fur nace, if desired. The longitudinal adjust inent of the nozzle 2 with relation to the casing A. and the discharge lip 20 of the atomizing cup is an important feature as it not only controls the volume of air discharging through the annular opening 30 but it also controls the volume of air passing through the atomizing cup, thus permitting an adjustment which will maintain an ideal temperature at this point and which will also, to a large extent, regulate the number of revolutions imparted to the atomizer.

VVhilethe burner here shown is more or less specific in construction and design, I wish it understood that it may be varied within the limits of the scope of the claims; similarly, that the materials and finish of the several partsmay be such as the experience and judgment of the manufacturer may dictate.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. In a burner of the character described a head member, a hollow shaft supporting the same, a centrifugal atomizing cup supported by the head member, a central cylindrical extension formed on the head member, a cap supported thereby, said cap being spaced with relation to the centrifugal atomizing cup to form an annular discharge opening, an oil delivering pipe extending through the hollow shaft and the head member, said pipe adapted to deliver oil to a chamber formed within the cylindrical extension on the head member, a plurality of radially disposed openings formed in the head member communicatingwith said central chamber and with the centrifugal atomizing cup to deliver oil thereto and a plurality of openings formed in the head member for delivering air to the interior of the centrifugal atomizing cup.

2. In a burner of the character described a head member, a hollow shaft supporting the same, a centrifugal atomizing cup supported by the head member, a central cylindrlcal extension formed on the head member, a cap supported thereby, said cap being spaced with relation to the centrifugal atomizing cup to form an annular discharge opening, an oil delivering pipe extending through the hollow shaft and the head memher, said pipe adapted to deliver oil to a chamber formed within the cylindrical extension on the head member, a plurality of radially disposed openings formed in the head member communicating with said central chamber and with the centrifugal atomizing cup to deliver oil thereto, a plurality of openings formed in the head member for delivering air to the interior of the centrifu gal atomizing cup, and a nozzle partially surrounding the centrifugal atomizer and the shaft, said nozzle being connected with a source of air supply.

3. In an oil burner of the character described, an outer casing and a nozzle in line therewith having a divergent discharge end, a hollow revoluble shaft, having a head member with a divergent cup concentric with the nozzle and a concave outer cap plate facing th'e'cup and spaced therefrom, both cap and cup having similar concentric peripheries, an interior concentric oil pipe with discharge ope'nings within the head and a plurality of inverted mixing cups, radial passages in the head through which oil is discharged between the outer cap and cup flanges, and longitudinal openings through the head, through which air under pressure from the rear of the nozzle is mixed with the oil.

4. In an oil burner of the character described an outer casing, a nozzle in line therewith having a divergent discharge end, a hollow rotatable shaft journaled in the casing having a head member with a divergent cup concentrically positioned with relation to the nozzle, a concave outer cap plate facing the cup and spaced therefrom to form an annular discharge opening, an interior concentric oil pipe passing through the hollow shaft and stationary with relation thereto, a plurality of radially disposed discharge openings formed in the end of said pipe and adapted to deliver oil to the cup, longitudinal openings formed in the cup through which air under pressure from the rear of the nozzle may enter, and means carried by the shaft and actuated by the air for imparting a rotary movement to the shaft and cup.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

ISAAC M. SHARP.

Witnesses:

G. M. BALL, J. H. HERRING.

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