US1406739A - Hydrocarbon burner - Google Patents

Description

J. C. HURLEY.

HYDROCARBON BURNER.

APPLxcATloN man DEc.12,1919.

Patented Feb. 14, 1922.

3 SHEETS-SHEET l.

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Josep/z C Hu r-Zc @may 47m/Mfr J. C. HURLEY.

HYDROCARBON BURNER.

APPLlcATloN mw DEc.12,1919.

Patented Feb. 14, 1922.

3 SHEETS-SHEET 2.

J. C. HURLEY.

HYDHOCARBON BURNER.

APPLICATION FILED DEc.12,1919.

Patented Feb. 14, 1922.

3 SHEETSAHEET a.

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UNITED STATES PATENT OFFICE.Q

JOSEPH C. HURLEY, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 PETROLEUM FUEL ENGINEERING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- TIQN OF PENNSYLVANIA.

HYDRocAaBoN BURNER.

Specification of Letters Patent.

Patented Feb. 14, 1922.

Application led December 1919. Serial No. 344,411.

To all wwm it may concern: Y.

Be it known that I, JOSEPH G. HURLEY, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Hydrocarbon Burners, of which the following is a fgull, clear, and exact description, reference being had to the accompanying drawings, which form a. part of this specification. y'

My invention relates to vhydrocarbon or heavy oil burners of the rotary 'cup type and more especially to burners4 ofthe-type wherein the air pressure is generated by a fan located directly behind the burner.

My invention has'for-its-objeot to provide a. novel type of air pressure generator and casing, in connection withfthe burner, which will produce and apply to fthe burner a maximum pressure with a minimum of loss.

A further object of my invention is to provide novel means whereby the air delivered by the fan. and the oil delivered to the burner, may be automatically controlled from the same source, so that the required relative proportions of oil and air will be provided for all conditions of service.

A further object of my invention is to provide a construction wherein the rotary cup, air pressure generator and oil supply pump are mounted in a straight line upon the shaft of the driving means.

Burners embodying my invention are highly eicient and economical of both fuel and power in all types of service. Their control is entirely automatic in operation and a great saving'in construction costs is obtained over the burners of similar type now in use.

Iwill now describe a preferred embodiment of my invention with reference to the accompanying drawings, in which like symbols refer to like parts in the several views and in which- Fig. 1 is a side elevation, partly in section, of the complete burner assembly, including the burner proper, the fan, oil pump and driving motor.

Fig. 2 is a rear elevation, partly in section, of the burner assembly with the driving motor andoil pump removed.

Fig. 3 is a front view of the fan casing, partly cut away.

Fig. 4 is a rear view of the fan.

The rotary oil cup a, supported by a bearing b, suitably supported in casing c,

is rotated :by the motor l through shaft e, secured to spider f in the cup. Directly behind the cup is located a fan comprising a hub g, keyed to the shaft e, and disk 7L with radial blades l, having a forward pitch e at their outer ends. To the rear of the blades is secured a plate z', having a central aperture, of greater diameter than the fan hub. rl`he edges of plate z' are rolled forwardly beyond the edges of the blades, as shown in Figure 3.

In front of the fan and secured to frame c is a bafile plate y', having a central aperture through which the plate e passes, which extends to the edge of the disk.

The rear of the fan is enclosed by a casing member 7c, bolted to casing c, provided with a centrally located aperture serving as an air inlet. The casing e encloses the front of the fan and extends outwardly downwardly and inwardly and is provided with radial vanes 4 to guide the air and prevent its having a rotary motion. The cup is surrounded by a tube m secured to the balile plate y' and extending approximately to the forward edge of the cup. A conical casing member n, secured to the casing c, surrounds the cup and forms an atomizer with the cup.

A pair of shutters 0, adapted to close or control the amount of air available to they fan through the air inlet aperture, are pivoted on the back of casing member lc. Arms p extending from the shutters are pivotally connected to a lever g, fulcrumed on the casing k, through links lr. The lever q is adapted to be connected at one end to, and is operated by, any suitable heat or pressure operated device, Ynot shown.

The motor Z is mounted on a bracket s secured to the casing member 7c. L Behind the motor and mounted on a bracket secured to bracket s is an oil pump t driven by the motor shaft e.

The complete casing is hinged at o to a base u, secured tothe furnace. Stops 7 on the casing are provided to correctly position provided with a stem 3 held between adjusting nuts on a rod 5 connected to lever g.

A length of pipe G connects `pipe z with pipe and forms a bypass for the pump, so that when valve 2 is closed the oil from the pump will pass into pipe fr and back to the pump, being held by check valve y.

In operation, the motor is started and the pump, fan and rotary cup put in motion. The lever (I is set relatively to (say) a thermostat which is to operate it, so that the air and oil supplies will be controlled proportionately, as desired. Assuming the furnace to be cold, the shutters o and valve 2 would be wide open.

The oil under the influence of the pump is delivered to the inside of the cup, where it strikes the spider f, is broken up thereby, and given a rotary motion under the influence of the centrifugal force set up by the rotations of the cup,which causes the oil to passout along the sides of the cup.

The fan generates a pressure of air which is guided outwardly by the baille plate l j and strikes the forwardly pitched tips of the blades where it is given an additional velocity. The forwardly rolled edge ol the plate z' guides the air into casing c and prevents any loss through back pressure. The air passes through casing c, which, due to its shape, offers no source ot' back pressure, and into casing n, about the cup, passing out of the constricted orifice adjacent the edge of the cup, where it meets the oil and mixes with it, driving it forward into the furnace. The tube m prevents the air from being given a rotary motion from the cup.

As the furnace heats up tothe required degree, the lever g is operated to more or less close shutters o and valve 2 simultaneously, thus cutting down the amount of air which the fan can take, and hence causing it to deliver a lower pressure, and cutting down the amount of oil sent to the cup, proportionately` giving a lwer flame. As the furnace cools, the reverse action gives a hotter flame. As the valve 2 is closed, the excess oil delivered by the pump passes through the bypass and back to the pump. It will be noted that the control of the flame is fully automatic and that the motor and various driven parts turn at a constant speed, and all driven members are mounted in a straight line upon the single shaft of the motor.

no back pressure is developed and at the same time a greater total pressure is built up than that developed bythe peripheral Velocity. The casing is so constructed as to conduct the air to the mixing point at a maximum o efliciency. The construction of the fan is such that the required pressure may be obtained, at lower speeds than heretofore, which permits of direct connection of the fan and motor and permits of the straight line drive of all parts, from the m0- tor shaft direct, instead of through gears as formerly.

The whole assembly may be turned out of the furnace on its hinges for the purpose of inspecting, cleaning or adjusting the parts.

Having now fully described my inven tion, what I claim and desire to protect by Letters Patent is 1. In a hydrocarbon burner, in combination, an atomizer for oil, a disc fan comprising blades the ends of which are pitched forwardly, a dise, having a central aperture affording an inlet for air, Secured to the rear of the fan, and having its edges rolled forwardly beyond the ends of the blades, means to close the aperture in said disc, and a conduit having stationary walls to lead the air from the fan to the atomizer.

2. In a hydrocarbon burner, in combination, a conical rotary oil cup, a sleeve surrounding the cup, a casing surrounding the sleeves and the axis of the oil cup and'having an air inlet near said axis, a shutter adapted to throttle said inlet, an oil pipe communicating with the rotary oil cup, a valve adapted to throttle said pipe, and mechanism adapted to simultaneously operate said valve and shutter.

3. lna. hydrocarbon burner, in combination, an atomizer comprising a rotatable oil cup and an air conduit, an oil pump, an oil valve adapted to control the supply of oil, a fan adapted to supply air to the atomizer, a casing positioned behind the fan and provided with an aperture about its axis, means to close the aperture, and means connecting the oil valve and an aperture-closing means adapted to control the relative air and oil supply to the atomizer.

In testimony of which invention,I have hereunto set my hand at Philadelphia, Pa., on this 11th day of December, 1919.

v JOSEPH C. HURLEY.

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