US1522114A - Locomotive engine - Google Patents

Description

Jan. 6, 1 25- 1,522,114

' w F. M. 60-55 LOCOMOTIVE ENGINE Filed Aug. 31, 1925 2 Sheets-Sheet 1 w. F. M. 6088 LOCOMOTIVE ENGINE 2 Sheets-Sheet 2 Filed Aug. 31

WITNESSES Patented Jan. 6, 1925.

PATENT oFFI'cE.

WILLIAM F. v1M1. GOSS, OF BARNSTABLE, MASSACHUSETTS.

LOCOMOTIVE ENGINE.

Application filed August 3 To all whom it may concern:

Be it known that I, WILLIAM F. M. Gross, of Barnstable, in the county of Barnstable and State of Massachusetts, have invented a certain new and useful' Improvement in Locomotive Engines, of which improvement the following is a specification.

My invention relates to induced draft ap pliances for locomotive engines, and is an improvement on that for which Letters Patent of the United States No. 1,275,672 were granted and issued to me under date of August 13, 1918.

The object of my invention is to provide an induced draft appliance, of the general class or type of that set forth in Letters Patent of the United States No. 1,275,672 aforesaid, which shall be of ready and conveniently applicability in locomotive boilers of present standard construction, and which shall embody simple and effective means for separating the solid matter of the products of combustion, from the gaseous matter thereof, and preventing its discharge, with the gaseous products, from the stack.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a vertical longitudinal central section through the forward portion of a locomotive boiler of standard type, illustrating an application of my invention; and Figs. 2 and 3,

transverse sections, on the lines a a and b b,

respectively, of F ig. 1.

Referring descriptively to the specific embodiment of my invention which is herein exemplified, it is illustrated as applied in a locomotive boiler of the present standard type, in which the shell or waist, 1, is traversed by a plurality of fire tubes, 2', extending from a firebox in the rear, which is not shown, to a smoke box, 4, connected, in the usual manner, to the shell, 1, of the boiler. The smoke box is, as usual, supported on cylinder saddles, and, in the instance shown it is increased in length by the addition of a removable extension ring, 4, which in connected to its main body by angle irons, 4 and bolts. The forward end of the smoke box is closed by a front, 4", having a door, 4", closing an opening in the front, through .which access is afforded to the interior of the smoke box, in which there is located a superheater header, 5, superheater pipes, 5*, steam pipes, 6, etc. The waste gases of combustion 1, 1923. Serial No. 660,374.

. are discharged to the atmosphere through a stack, 8, on the smoke box. I In the practice of my invention, as applied in a locomotive boiler of the above stated axially, with the boiler. A'draft fan, 14, is

secured upon the'opposite end of the shaft,

12, and a turbo mufiler, 10, which is in theform of a section of a hollow sphere, extends rearwardly from the turbine casing, to a vertical plane a short distance the draft fan.

An exhaust supply pipe, 7 which communicates, in the manner of an ordinary exhaust pipe, with the exhaust passages of the cylinder saddles, leads therefrom into the turbine casing, 9, and the exhaust steam which is supplied by said pipe, passes to the turbine, 13, through orts inthe turbine casing, and after actuating the turbine, escapes radiall therefrom, into the smoke box, through the discharge opening constituted by the open rear end of the turbo mufiler,10, and thence passes to the atmosphere, through the stack. The draft fan, 14,is surrounded by, and rotates freely in, a concentric annular cinder separating chamber, 16, which is closed at its forward end,-and has an inclined outer wall, in the form ofa rearwardly tapering frustum of a cone. The open rear end of forward of the chamber, 16, communicates with acol usual relation of the scroll to the fan blower cannot be adopted, by reason of the applica tion of the cinder. separating chamber before described and, therefore, the scroll is laterally deflected by being, as stated, located eccentrically to the separating chamber. The relation of the scroll thereto is designed with reference to such restrictions as are encountered in its use. The scroll may be of either rectangular or rounded section, and increased area in its development may be obtained by extension radially, or if surrounding conditions render such extension prohibitive, by axial extension, or by extension in both directions, to the end of affording a scroll development, in connection with a fan blower which will insure efliciency in the operation of the latter, and will be within" the limit of/dimensions determined by the general design of the front end of the locomotive boiler.

The space between the chamber, 16, and the turbo blower, which is open to that forward of it in the smoke box,-may, if rendered desirable by exceptional conditions, or required by legal enactment, be closed by a sheet of netting or perforated plate, 18, as indicated in Fig. 1.

The products of combustion which are discharged from the front ends of the boiler tubes, 2, are conducted therefrom to the draft fan, 14, through an intake tube or conduit, 20, of curved longitudinal peripheral section, and gradually reduced in transverse section from its rear towards its front end, and extending from the front tube sheet, 2, ,of the boiler, to a plane closely adjoining the rear of the draft fan. The front end of the intake tube is open, and it is connected, atits rear end, partly to the front tube sheet, 2, and partly to the superheater header, or any other member projecting from the tube sheet, so as to prevent the discharge of the products of combustion otherwise than through it. The prime function of the intake tube is to concentrate the relatively wide and slowly moving stream of products of combustion into a stream reduced in diameter \to that of the intake of the draft fan, with a correspondingly increased. velocity. The progressively forwardly reduced transverse section of the intake tube is therefore developed on a stream line design. The provision of which increases the efficiency of. the draft 'fan,'and accuracy in design permits such efficiency.

It has been developed by experience that When-.the gaseous products of combustion,

with their commingled burden of solid matter, are'conducted to the draft fan through a plain intake tube, the effect of the impact of the solid particles,-on the moving blades and other members of the draft fan,

' tends, when sufliciently long continued, to

the destruction of the latter. A secondary function of the intake tube is to efi'ect a re duction of such impact, and to further increase the efficiency of the draft fan. a To this end, a plurality of upstanding vanes or blades, 20, is secured, to the inside of the intake tube, said. vanes extending substantially longitudinally, or with a pitch of zero, for some distance from their initial or rear ends, and being increasingly curved thereafter, so as toimpart to the body or columns of gasesapproaching the draft fan, a rotary motion in the direction of that of the draft fan, whereby the solid particles which are commingled with the gases entering the draft fan, are endowed with a rotary motion, approximately that of the draft fan, resulting in a reduction of impact and prolongation of the life of the latter, as Well as increasing the eflicienoy of its action.

A cinder delivery pipe, 17 leads from the bottom of the cinder separating chamber, 16, to any preferred receptacle, which may be the firebox of the boiler, the ash pan, or a box or casing from' which the delivered solid matter may be withdrawn from time to time as may be required.

In'order to operate the turbine when it is desired to increase the draft, in periods in which the locomotive is standing or drifting, a valve controlled blower pipe,- 15, is led from the steam space of the boiler into the turbine casing, 9, said pipe being open to the buckets of the turbine, through suitable supplemental ports.

In the operation of the appliance, when the locomotive is running under steam, i. e., with its throttle open, all the exhaust steam from the cylinders is*delivered .to the turbine, 13, which, with the connected draft fan, lei, is thereby rotated. The centrifugal action of the wings of the fan, upon the products of combustion passing out of the boiler tubes, draws the commingled gaseous and solid constituents of the products, through the intake tube, 20, into the separating chamber, 16, in which, by their impingement on its inclined wall, the dust or solid matter is effectively separated from the gases, and drops to the bottom of the, chamber, from which it is discharged, through the delivery pipe, 17, to a suitable receptacle. The gaseous constituents are forced by the fan, from the separating chamber into the scroll, 19, from which they are continuously discharged to the atmosphere, through the draft pipe, 19a, and stack, 8. The exhaust steam from the tur' bin, fills the space within the turbo mufier, and thence escapes, in a quiet, continuous outflow stream, into the smoke box, in front of the'separating chamber, 16, and thence, out of the stack.

Among other features. of operative advantage, there may be noted, the more thorough separation of the solid from the gasebers, other than the intake tube, in the re- 7 movable extension ring, 4.

I claim as my invention and desire to secure by Letters Patent:

1. In a locomotive boiler, the combination with a fan and driving means therefor located in the smoke box, of a concentric casing surrounding said fan and constituting an'annular cinder-separating chamber closed at its front end with its outer wall inclined rearwardly, and an eccentric spiral collecting ring or scroll communicating with and surrounding the open rear end of said chamber and open at its top to the stack said ring or scroll being of progressively increasing sectional area.

2. In a locomotive boiler, the combine-- tion with a fan and driving means therefor located in the smoke box, of a concentric casing surrounding said fan and constituting. an annular cinder-separating chamber closed at its front end with its outer .wall

inclined rearwardly, a collecting ring or scroll communicating with and surrounding the 'open rear end of said chamber and open at its top to the stack, and a forwardly tapering intake tube leading to said fan communicating and passing through said scroll, said tube having means for imparting a rotary motion to the combustion gases in the samedirection as that of the fan.

3. In a locomotive boiler, the combination, with a fan and driving means therefor located in the'smoke box, of a concentric casing surrounding said fan and constituting an annular cinder-separating chamber .closed at its front end with its outer wall inclined rearwardly, a collecting ring or scroll communicating with and surrounding the open rear end of said chamber and open at its top to the stack, and a forwardly tapering intake tube leading to said fan and passing through said scroll, said tube containing a plurality of internal blades or vanes, the pitch of which increases towards the ,front end of said tube.-

4. In a locomotive boiler, the combination of a fan in the smoke box, of an intake tube for leading the products of combustion to said fan, and spiral blades within said tube for imparting whirling motion to said products in the same direction as that in which the fan rotates.

5. In a locomotive boiler, the combination of-a fan in the smoke box, a forwardly tapering intake tube for leading the gases of combustion to said fan, and a plurality of blades or vanes spirally arranged within said tube, the pitch of said blades increasing towards the outlet end of said tube, as and for the purpose described.

WILLIAM F. M. GOSS.- Witnesses:

Y J. SNOWDEN BELL,

/ W, R. WARNER.

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