US2298745A - Oil burner apparatus - Google Patents

Description

Oct. 13, 1942. w KLQCKAU 2,298,745

0 IL BURNER APPARATUS Filed Aug. 30, 1939 2 Sheets-Sheet l INVENTOR.

Aw ATTORNEY.

Oct. 13, 1942. v b W. F. KL.OCKAU 2298;745 v OIL BURNER APPARATUS Filed Aug. 30. 1939 2 Sheets-Sheet 2 FIEE mm? BY W A TTORNE Y.

Patented Oct. 13, 1942 UNITED STATES PATENT OFFICE I Applicam :i ::g:st: 292,682

1 Claim. ((1158-48) y My invention has reference to oil burner apparatus, and relates more specially to means for regulating the air supply with which such devices are provided.' This is for mixing the air with a liquid fuel supply, and it is important that the supply thereof shall be constant anduniform, as a variation in the pressure will result in an unstable combustion efficiency, which .will vary with every change in the force of the air current passing through the apparatus.

The usual method of providing the air supply is by means of a fan, or blower, which is connected with a motor, and always operatesat motor speed. The amount of air delivered to the feed mechanism can be controlled in one of two ways, first, by reducing the supply or choking it oil at the intake to the fan housing, or, second, metering the stream at the discharge port of ;said housing. The first named method is uncertain and unsatisfactory, and the present invention has to do with the second of said methods.

An attempt to regulate the amount of air supplied at the intake of the housing, as by reducing the opening, usually results in the forming of a vacuum at the intake, the intensity of which will varywith the setting of the air adjustment, and as a result the blades of the fan find it impossible to pick up a full load of air. The pressure developed by the fan therefore differs for each setting of the adjustment. The pressure 30 also varies with the intensity of the natural draft through the oil burner apparatus.

By the use of the other method, with the intake to the fan unobstructed, each blade of the fan will pick up a full load of air, and a definite pressure will be developed. If the metering device at the discharge port of the fan housing, is closed to any point between full closed or full open each blade will still be able to pick up a full load of air and maintain a uniform amount of pressure.

It has been shown by actual tests that by having the adjustment atthe discharge side of the fan the amount of pressure in the fan housing is practically doubled, and that the higher air pressure also reduces the tendency of the flame into such cylinder can be increased or lessened, as desired. The damper is also effective in preventing a checking or eddying of the current of air at the intake end of the cylinder, and is also disposed so as to give a movement to the current along the channel in said cylinder, towards the outlet. The now canbe quickly adjusted to conform to a variation in the capacity of the fuel feed, and it is common practice to adjust the air and set it for each installation of a machine.

The particular construction, arrangement, and manner of using the invention will more fully appear from the following specification, reference being had to the accompanying drawings, in which: i I

Fig. 1 is a longitudinal section of a machine, equipped with the invention.

Fig. 2 is an end view thereof looking at the intake and of the cylinder 9.

' The reference number 5 indicates a stand provided with legs 6, and having a central vertical bore I, threaded to receive a similarly threaded stem 8, on the upper end of which is mounted a cylinder by means of a socket It on the lower side of the cylinder, also threaded to receive the stem. Said stem is held from rotation by means of nuts II and I2, rotatable on said stem, and locking against the upper and lower ends of the hub i of the stand, respectively. By adjustment ofposition of stem, the height of the cylinder above the floor can be varied.

The cylinder 9 has an extension 9, inside which is a frame I3, supporting a feed pipe ll for liquid fuel, provided with a nozzl ii at the discharge end of the cylinder. The frame l3 also supports an insulator l6, through which pass electrical conductors l1, coming' from a transformer II, and provided near the outer end of the cylinder with ignition terminals l9. At this point the air is mixed with the liquid fuel, producing a combustible vapor, which is conducted into an adjoining furnace by means. of spirally disposed vanes in a ring 20 at the end of the cylinder. This gives a whirling movement to the to pulsate. Another advantage is derived from the reduction in the roar of the air coming through the intake openings when the size of such openings has been reduced.

The present invention has for its purpose to regulate the fiow of air at the point of discharge into the air cylinder, leading to the flame, by means of an arcuate damper or baiile, with advapor stream, with conical effect. The parts set forth in the foregoing paragraph are not considered to be novel in the present showing thereof.

Mounted on the cylinder 9 is a drum-shaped casing 23, housing a chamber 24, communicating with the cylinder 9 through an opening at 25. Mounted in the casing 23 is a shaft 26, upon which is secured a rotary fan or blower 21, the movement of which tends to draw the air in justment features whereby the amount of flow through openings in an intake cylinder 28 at one side of the casing, and supported by a frame II.

The shaft 26 lsniounted eccentricaily of the chamber 24, and in the movement of the fan the air is driven along a passage of volute formation, and down to the opening at 25, as indicated by the arrow. At the opposite side of the casing from the intake is mounted an electric motor 30, the shaitzof which is connected with the shaft 2, or may be formed continuously therewith. During the operation of the motor the fan is in constant movement, and at a speed corresponding with the speed thereof.

On the outside of the intake cylinder 2! is an oil pump 32, also driven from the motor ll, and connected by a pipe 33 with the feed pipe II. This pump is connected with a suitable source of supply of liquid fuel, from which the oil burner can be constantly served.

Slidable in the wall of the casing 23 is a plate 34, of semi-cylindicai form supported by a bolt 35 movable in a slot 38 in the wall of the casing. The plate is of approximately the same width as the interior of the casing, and the lower end thereof projects into the channel 25, directing a stream of air into the cylinder 9, and into the main channel of said cylinder, in a direction to carry it toward the discharge and flame end thereof.

By loosening the bolt 45, the plate 34 can be shifted to increase or decrease the size oi the opening at the end thereof, with a corresponding change in the force and capacity of the air supply. The adjustment will'generally be made to conform to the style and capacity of the nozzle at the fuel discharge, and, as hereinbefore stated, it can be set for various installations.

It will be noted that the lower end or the plate closed by a removable closure 9'', and upon said closure being taken out the parts positioned in the cylinder can be removed or replaced through the opening. At such times the plate 34 is moved upwardly out of the way.

By the apparatus herein described, the intake to the fan casing is undisturbed at all times, with no change of the air capacity at that point, and no danger of vacuum formation, or other hindrance, at the intake.

What I claim, and desire to secure, is:

In an oil burner apparatus, a cylindrical air tube. provided with a discharge opening at one of its ends and a closure at the opposite end, a liquid fuel supply pipe; supported in sale air tube for conducting a supply of fuel to said discharge openin a nozzle on said pipe and discharging through said opening means for igniting the fuel air mixture at the point of discharge, a blower having ,a cylindrical walled casing supported on said air tube near the closed end thereof, said casing having an air intake in one of its walls and a discharge opening into the air tube, a semicylindrical battle-plate supported in contact with the inner face of the cylindrical wall of said casing, extending through said discharge opening and into the air tube toward the discharge end of said tube for preventing turbulence in the closed end of said tube, and means for adjusting the said baflle-plate to the discharge opening.

, WILLIAM F. KLOCKAU.

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