US2369216A - Combustible preparing device - Google Patents

Description

Feb. 13, 1945.y G. B. clsP COMBUSTIBLE PREPARING DEVICE Filed May 27, 1942 INVENTOR. BY George Bui C'Vip- Patented F eb.. 1 3, *1945 UNITED STATES PATENT OFFICEl COMBUSTIBLE PREPARING DEVICE George B. Crisp, Brooklyn, N. Y. Application May 27, 194.2., Serial No. 424.473'7v 3 Claims.

This invention relates to combustible preparing devices, and is related particularly to such devices for preparing combustible mixtures of fuel oil and air for suchpurposes as use as the explosive mixture in internal combustion engines, as the combustible mixture for furnaces, and as the combustible mixture for other mechanisms requiring the same.

Numerous efforts'have heretofore been made to utilize fuel oil as the fuel for internal combustion engines primarily designed for use with hydrocarbons, particularly gasoline, of a more volatile character. The principal difficulties encountered have their inception in the unsuccessful or imperfect atomization of the fuel, and the results have been slow or uncertain starting of the engine, high carbon deposit, development of excessive carbon monoxide, inefficiency and other deficiencies.

An object of the present invention is-to overcome the above-enumerated and other difficulties.

A further object of the invention is to obtain maximum atomization of and maximum power from the fuel.

Another object of the invention is to minimize temperature conditions in its effect upon atomization of the fuel.

Yet another object of the invention is to take care of condensate and avoid its beingforcedinto the engine manifold or engine. o Still further objects of the invention will appear to those skilled in the art as the description progresses, both by direct statement thereof and by implication from the context.

Referring to the accompanying drawing in which like numerals of reference indicate similar parts throughout the several views;

Figure 1 is a sectional elevation of a preferred embodiment of the' invention; and

Figure 2 is a longitudinal section of the bank of centrifugal vanes shown in elevation inl Fig. 1, and on a scale increased over that of Fig. 1.

In the specific embodiment of the invention illustrated in said drawing, the reference numeral I designates a casing body portion of the mixing and discharge part of the device, said casing body portion being composed of a plurality of sections for convenience of fabrication. At the fuel inlet end of this casing, boltedat the end thereof coaxial therewith, is an electric or other motor II having a hollow shaft I2 therethrough and protruding from both ends of the motor. Within the casing body and mounted upon the end of the shaft protruding thereinto are a pluor outer end of the shaft I2 is coupling means for effecting appropriate fuel-conveying transfer to the rotating shaft from a non-rotating feedline. Said feed-line includes a valve Ill4 for regulating the fuel supply permitted to pass to the hollow shaft and vanes.

Said casing body portion IU, in proximity to the vanes, but not in the centrifugal path from the edges thereof, provides an air inlet I5. This inlet is shown rearwardly of the vanes and substantially at the end of the casing nearest the motor.v ,Suitable` butterfly or other regulating valve I6 is utilized to control the quantity of air admitted. 'Beyond the vanes, the casing is suitably shaped and constructed for conveying the mixed fuel and air to the manifold of an engine (not shown) Continuing the general reference to the disclosure, it may be further said that operation of the device contemplates continuous and substantially constant-speed operation of motor Il and utilization of'A the said hollow shaft` I2 as the armature shaft thereof. Fuel, such asfuel oil of suitable grade,v is "introduced in regulated amounts through valve I4, shaft I2 and thence through lateral openings I1 onto the inwardly directed surfaces of the vanes I3. By virtue of the vanes iiaring toward their free edges in conjunction with the high speed of rotation thereof imparted by the motor Il, the fuel oil spreads into a film and the film becomes thinner toward the edges of the vanes by virtue of the surface dimensional increase resulting from the geometry of the said vanes. Finally, the rariled film reaching the edges of the vanes is centrifugally and violently expelled in a direction outwardly in a highly atomized condition.

Normal suction of the engine draws air into the casing body through air inlet; I5 behind the atomized fuel which isthereby both mixed with the air very .thoroughly and carried by it to the engine with the mixture in a highly explosive state. Regulation of the proportions of air and fuel enable full utilization of the potential explosive power of the fuel and minimum condensation in transit and formation of minimum carbon monoxide and carbon in the engine.

As will be understood by those skilled in the art, the valve crank 48 on the air-inlet butterfly and a crank on the fuel'inlet valve I4 may be linked together for maintaining proper proportion of fuel and air. y

The atomizing and air mixing portion of the device includes the heretofore mentionedbank of yrality of centrifugal vanes I 3. At the opposite vanes I3 within body portion I0. Said vanes are preferably individually formed, providing each a hub portion and a flaring portion with the vanes partially nested but with space for oil film and escape provided between the overlapping flaring portions. A stud or other means 49 extending axially through the hub portions of the vanes to the first or larger one is threaded into that one thereby clamping all ofthe Vanes in a bank. The inner or larger one of the vanes has its hub appropriately socketed and threaded and screwed onto the end of .the motor shaft'. From its end next the shaft said stud is longitudinally provided with a duct 50 as far as the stud head. A

plurality of radial ducts l1 are provided fromy the longitudinal duct to the several spaces between thearing Vane's.

In use, the motor turns continuouslyand therefore centrifugal action is continuously operative upon the fuel oil in the longitudinalduct of the 56, the upper end of which helps to form said trough 53, is provided at the extreme outlet end, the` same being appropriately flanged for attachment to the engine manifold or for other purpose as may be found desirable. A throttling butterfly valve 51 is situated in this neck for l governing the outflow of the mixture, and if so desired, this butterfly may also be linked with the air and fuel controls as will be understood by those skilled in the art.

1v. A combustible preparingf'device comprising va casing, a rotatable hollow shaft in said casing, a plurality of nested funnel-like vanes secured at the end of said vshaft and rotatable therewith, each vane having a flaring portion proximate to the axis of rotation and a differquantity in the longitudinal duct so the rst radial duct only discharges a' part k'thereof and the 'nextradial'l duct receives' and discharges some, and so on' for 'the 'several radial ducts as the `valve is opened lto 'maximum ow; The` atomization from the Vane or'vanes is just as complete whether one ora-ll ofthe vanes are 'receiving fand- 'discharging the oil', so the engine will function 'effectively when'throttled down or when receiving maximum'fuel supply. The portion of casingli surroundingthe discharging edges of thev vanes, is somewhat larger in diameter than adjoining portions .of the casing, thereby pocketing excess' or nonfatomized. fuel. An outflow opening 15| Vis provided at, thebottom of this ent largedpart ofthe casing 'fordraining the accumulationxof oil therefrom to return it to the tank or otherwise'dispose ofit through Ysuitable piping.; such as yindicated at 52.

Thefpart of casing 10 through which the mix ture of fuel andcQmbustion air passes after leaving the enlarged Vportion last described, turns downwardly and isI provided with an internal peripheral trough 53, also provided with a drain opening "5'4 and suitable pipe connection., as 55 to carry, the excess or condensedfuel 'back to the tanker otherwise dispose, thereof. The several drain openings and connections enableall liquied condensate .or "fuel oil tobe'dyerted vfrom entity into the engine. A tubular outlety neck n between the vanes.

ently flaring forward discharge portion more distant from said axis, each said proximate portion of ,successive vanes sloping more abruptly from the axis than the preceding one and at greater angles than the ,angles of slope ofthe forward discharge portions,v and the forward discharge portions successively projecting further from` their respective proximate portions than the precedingone and having successively smaller diameters of forward edges' than the preceding one.

2. A combustible preparing device comprising acasing, a rotatable hollow shaft in said casing, a plurality of' nested, funnel-like vanes secured at the end of said shaft-and rotatable therewith, each'vane `having a flaringv portion proximate to the axis of rotation and a differently flaringforward discharge portion more .distant from said axis, each said proximate portion of successive vanes sloping more abruptly from the axis and of less length than the preceding one `and vat greater angles of slope of thelforwardfdischarge portions, and the forward discharge portions successively projecting furtherfrom their respectivel the ,other -varies forcsecuring {saidvanes together,

saidjstud having a flow passagetherein Afrom-the' hollow of' said shaft' and `with,lateral .openings GEORGE B. .oRIsR

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