US1877350A - Atomizer - Google Patents

Description

Patented Sept. 13, 1932 UNITED STATES PATENT OFFICE HARRY MEACHEM, OF TEANECK, NEW JERSEY, ASSIGNOR TO TODD DRY DOCK, EN-

GINEERING & REPAIR CORPORATION,

OF BROOKLYN, NEW YORK ATOMIZER Application filed February 25, 1931, Serial No. 518,139. Renewed June 29, 1932.

This invention relates to liquid fuel burners and my improvements are directed to an atomizer structure wherein liquid fuel, introduced thereinto under rotatingly low pressure, is subjected to high speed rotative means that impel the liquid fuel through a number of successive stages in said structure,

until it reaches the emission outlet, which may be in the form of a circularly tangential slit, whence the fuel issues whirlingly m a film that is caused to'take a partly spherical form.

To aid in preventing this partly spherical film of liquid fuel from tailing out radially,

primary and secondary supplies of air, provided to support combustion, may be employed in the manner set forth in my companion case, filed concurrently herewlth, entitled Improvements in the methods of air delivery for fuel combustion and apparatus therefor, with Serial No. 518,138

and filing date of February 25, 1931, the present application dealing particularly with the structure of the atomizer per se.

Other features and advantages of my invention will hereinafter appear.

In the drawing:

Figure 1 is a side elevation, partly in section, of my improved atomizer, and

Fig. 2 is a front view of the spindle, with the member 14 removed.

The atomizer herein illustrated is shown as having a tubular casing 1 in which is revolubly fitted a spindle 2, rotatable in a counter-clockwise direction, viewed in the direction of flow, and that is provided with a succession of annular grooves or depressions 3, thereby leaving upon the spindle a series of radial flanges or collars 4 that are separated by intervening spaces 5. Notches 6 are formed in the periphery of each flange or collar 4 as means of communication between the spaces, and said notches may have staggered relation in succeeding flanges.

Spindle 2 has a reduced extension 7, bearing a screw thread 8, said extension with its thread being housed partly in an extension 9, of smaller diameter, of easing 1, and partly in a casting 10 that is in screw threaded 60 engagement with casing extension 9. A motor shaft 11 is shown as having a bearing in casting 10 and as being in screw threaded engagement with spindle 2, it being intended that the spindle is to be given a high speed of rotation which in practice has been 3500 R. P.

Liquid fuel introduced into an interspace of thread 8, as from a duct 12 in casting 10, is guided toward the flanged portion of the spindle in its rotation, and is forced through the stages represented by the flanges 4, with their staggered communicating notches 6, for issuance at the nozzle end of the atomizer.

The notches 6 are angled, as shown, to form a taper with the wall of easing 1 against which the spindle flanges rotate, the thin end of the taper leading in the rotation of the spindle. Hence liquid fuel in passing through the notches becomes thoroughly pulverized or broken up as it enters the successive stages of the atomizer..

The forward end of tubular casing 1 is beveled, as indicated at 13, and a cap member 14, secured upon a projecting end portiongtlli of spindle 2, co-acts with said bevelledhid 13, with which it is in spaced relation, to provide an annular slit 16 for issuance of the whirling fuel in the form of a film. The cap member 14 is adjustable along spindle portion 15 to thereb vary the thickness, and hence the volume 0 the issuing film of fuel. The surface 17 of cap member 14, which is opposed to the casing end 13, is of convex contour, to thereby cause the issuing fuel film to take a conoidal form which adapts it par-v ticularly for co-operation with the supplies of primary and secondary air provided by the apparatus referred to in my aforesaid companion case.

Although forming no part of the present application, a primary air supply nozzle is herein illustrated as a tubular member 18 that surrounds the casing 1 in a manner to provide an annular space 19 between said member and casing, just anterior the fuel issuance slit 16, said space 19 being a continuation of an air passageway 20, which is in communication with a source of pressure air supply, not illus-- trated herein. The effect of the pressure of the outlet for space 19 lying a air, leaving the annular space 19, upon the film of fuel leaving issuance slit 16, is to impart a partly spherical form to said film.

Variations within the spirit and scope of my invention are equally comprehended by the foregoing disclosure.

I claim:

1. A multi-stage atomizer for liquid fuel comprising a tubular casing, a spindle rotatable therein, a series of spaced, radial flanges on said spindle, said flanges co-acting with the spindle and casing to form intervening spaces, means of communication throu h said flanges, means for supplying liquid fuel to said casing, near one end thereof, means within the casing for impelling the liquid fuel toward the flanges, and means for the issue of fuel at the other end of the casing.

2. A multi-stage atomizer for liquid fuel comprising a tubular casing, a spindle r0tatable therein, a series of spaced, radial flanges on said spindle, said flanges co-acting with the spindle and casing to form intervening spaces, peripheral notches in said flanges for the passage of liquid fuel, the notches in succeeding flanges having staggered relation, means for supplying liquid fuel to said casing, near one end thereof, means for impelling the liquid fuel toward the flanges, and means for the issue of fuel at the other end of the casing. 1

-3. A multi-stage atomizer for liquid fuel comprising a tubular casing, a spindle rotatable therein, a series of spaced, radial flanges on said spindle, said flanges co-acting with the spindle and casing to form intervening spaces, peripheral notches in said flanges for the passage of liquid fuel, said notches being tapered circularly, with the thin end of the taper leading in the rotation of the spindle, means for supplying liquid fuel to said casing, near one end thereof, means for impelling the liquid fuel toward the flanges, and means for the issue of fuel at the other end of the casing.

4:. In an atomizer for liquid fuel, in combination, a tubular casing, a spindle rotatable therein, means for supplying liquid fuel to said casing, a series of spaced apart flanges on said spindle, in co-action with said casing, said flanges having peripheral notches for the passage of fuel, and the delivery end of said casing having an inclined, annular slit, for the issue of fuel in hollow, conoidal form.

5. In an atomizer for liquid fuel, in combination, a tubular casing, a spindle rotatable therein, means for supplying liquid fuel to said casing, a series of spaced apart flanges on said spindle, in co-action with said casing, said flanges having peripheral notches for the passage of fuel, the delivery end of said casing having an inclined surface, and a head port-ion for said spindle having a convex surface in opposed relation to the inclined end of the casing, thereby providing an inclined slit for the issue of a film of fuel in hollow, conoidal form.

6. In an atomizer for liquid fuel, in combination, a tubular casing, a spindle rotatable therein, means for supplying liquid fuel to said casing, aseries of spaced apart flanges on said spindle, in co-action with said casin g, said flanges having peripheral notches for the passage offuel, the delivery end of said casing having an inclined surface, and a head portion for said spindle having a convex surface in opposed relation to the inclined end of the casing, thereby providing an inclined slit for the issue of a film of fuel in hollow, conoidal form, and means for ad'- justing the width of the slit.

7. In an atomizer for liquid fuel, in combination, a tubular casing, a spindle rotatable therein, said spindle carrying a screw thread near one end of said casing, means for introducing fuel to an interspace of said thread, a series of spaced apart flanges on said spindle, in co-action with said casing, said flanges having peripheral notches for the passage of fuel, and means at the other end of said casing for fuel delivery.

New York, N. Y., February 2nd, 1931.

HARRY MEACHEM.

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