US2094972A - Stoker fuel deflector - Google Patents

Description

Oct. 5, 1937. c, J SURDY STOKER FUEL DEFLECTOR 2 Shee ts-Sheet 1 Filed March 22', 1934 INVENTOR. 612/65 (mam/ ATTORNEY.

Oct. 5, 1937. c. J. SURDY ST CKER FUEL DEFLEC TOR 2 Sheets-Sheet 2 Filed March 22, 1954 V A V m 2/ A INVENTOR.

Qzar/ea J 51mg? l/III/I/IIIII/l/III/IIII ATTORNEY.

Patented Oct. 5, 1937 UNITED STATES PATENT OFFICE .mesne assignments, to The Standard Stoker Company, Inc., New York, N. Y., a corporation of Delaware Application March 22, 1934, Serial No. 716,758

7 Claims. (o1. 110-101) My present invention relates generally to fuel deflectors as employed with mechanical stokers for firing locomotive furnaces and the like, and it appertains especially to an embodiment of the fuel deflectors as disclosed in the United States Letters Patent No. 1,947,723, granted February 20, 1934, to Nathan M. Lower.

Accordingly, this invention contemplates the provision of fuel deflectors and means associated therewith for bodily moving the deflectors longitudinally and transversely of the stoker feed conduit. Where more than one deflector is employed 7 I prefer to arrange the operating mechanism for independent operation of each deflector.

In carrying out my invention, it is a specific object to provide a pair of upstanding deflectors oppositely disposed one at each side of the discharge mouth of the stoker, each deflector having a forward vane portion extending in the direction of the flow of the fuel through the conduit, and having a rearward portion disposed outward- 1y and at an obtuse-angle' from the forward vane portion, each deflector being movable independently-of the other obliquely with respect to the vertical medial plane of the stoker conduit, where by the deflectors are moved across, the stoker discharge conduit to form an expansibleand contractible mouth therefor, shiftable longitudinally and transversely of the conduit.

Another object of my invention contemplates the pivotal mounting of the forward vane portion of each deflector with its respective rearward portion and these pivotally mounted forward vane portions are adjustable independently of each other so that each deflector, aside from being bodily movable transversely and longitudinally of the conduit, has a forward vane portion movable about an'upstanding axis, thereby producing fuel deflecting means very flexible in operation to meet the conditions of firing as the exigencies may require.

These and other objects, such as the operating means for each deflector, and the novel construction of the parts and their relations one with another will be apparent upon the reading of the following specification in connection with the accompanying drawings, in which, I

Figure 1 is a fragmentary central verticalsec- ,tion through the rear portion of a locomotive with the stoker fuel conduit in which my invention is embodied shown in similar section;

Figure 2 is a plan section taken on the line 2-2 of Figure 1; V

55 Figures 3,4,;and 5 are sectional views taken on the line 3--3, line 4-4, and line 55, re spectively, of'Figure 2;

Figure 6 is a plan section similar to Figure 2 showing a modification;

Figure 'l is a plan section similar to FiguresZ and 6 showing another modification; and

Figure 8 is a sectional view taken on the line 7 8-8 of Figure 7.

Referring-now to .Figures 1 to 5, inclusive, the boiler is shown at), its firebox at II, and the backhead at H having a firing opening I3 therethrough. Fuel is delivered to the firebox by suitable stoker mechanism, only so much being shown as is necessary to a complete understanding of the invention. The stoker mechanism includes a conduit M which leads forwardly from a source of fuel supply and is provided with a laterally flaring discharge mouth it in communication with the firing opening it for delivering fuel thereto. Flanges such as I6 areprovided at the sides of the conduit M for attaching it to the backhead l2.

In its bottom, the flared discharge mouth l5 is'recessed or cutaway as at I! to receive the chambered jet table 18 which forms a continuation of the bottom of the conduit [4 and is provided at its forward end with jet openings such as 19. These openings l9 discharge jets of pressure fluid across the distributor plate 20 for projecting the fuel'thereover to all parts of the firebox. A screw 2! advances the fuel through the conduit l4 and although as illustrated this screw terminates adjacent the plane of the backhead 52, it is obviousthat it may extend forwardly into the firing opening I3 or it may terminate an appreciable distance rearward of the position shown, without departing from the spirit of my invention.

Instoking devices of the character described and illustrated, it has been found in practice that the conveying screw has a tendency to discharge more fuel to one side of the stoker discharge mouth than to the other, depending on the direction of the flight windings and also upon the direction of rotation. Thus, the fuel stream delivered in front of the jet openings 19 is of unequal volume sothat more fuel is spread over one side of the firebox than the other side, causing troublesome fire conditions.

at each side of the stoker conduit and preferably in the flared discharge mouth l5 thereof. The

deflectors 22, 23 are provided with forward fuel deflecting vane portions 24,25, and the planithreaded along their respective stems.

' form rearward portions 26, 21, respectively. The forward vane portions 24, 25 are disposed substantially in the direction of the flow of fuel through the conduit i l,- whileIthe rearward portions 26, 21 extend at'an obtuse. angle from the' respective forward, portions to points exterior of a the conduit.

The respective side walls 28, 29 of the conduit I4 at the discharge mouth thereof are provided of assembly, the lateral extensions 32, 33 are secured to the respective rearward portions 26, 2'!

by screws such as 45, although if found convenient, theymay be formed integrally therewith. '-By the construction described, a novel and effective fueldeflecting system is provided that will deflect the desired quantities of'fuel to selected portions of the distributing plate 2|], and

V consequently, to the selected or desired portions of the firebox. Thus, should it be necessary to 7 deliver more coal to the left side of the firebox,

the fireman turns the nut member 39 ina direction which will cause it to move outwardly from the side wall 29 of the conduit. This will retract thegrearward portion 21 of the deflector 23, and cause the forward vane portion 25 thereof to be 7 moved rearwardly and outwardly. 'If necessary,

the nut member 38 may be turned so as to cause the deflector 22 to move forwardly and inwardly of the mouth portion [5. This changes the course of the, fuelflow so that a greater quantity of fuel is delivered onto the left side of the plate 20, and consequently to that side of the firebox. It will be understood that the deflectors 22, 23 may be moved bodily in various relations to the dis b charge mouth ofthe conduit, forming an expansible and contractible mouth at various points transversely and rearward of the fuel discharge edge formed. by the front face 42 of the chambered jet table l8, To explain the movement of each deflector in another way, it maybe said that the free end of each fuel deflecting portion moves in a plane which is spaced from and par allel to the oblique plane of movement of the rearward portion of each deflector. In Figure 6 there is shown a modification of my invention wherein the rearward portions 26b, 21b of the respective deflectors 22b, 23b extend through side walls of the conduitsat an angle to the vertical medial plane passed through the conduit which is not so acute as the'corresponding angle shown in Figure 2. By this construction, the forward portions Mb, 25b of the deflectors 22b, 23b, respectively, will have a greater movement trans- 'versely of the mouth 15 than the movement lon- .gitudinally of the conduit. In the construction shown in Figure 2, the movement longitudinally of the conduit is greater than the movement transversely thereof. However, it will be recognized that the particular angle is a matter which is governed by the expected conditions of service. 7

r a In Figures 7 and 8 I have shown another modification of my invention wherein the forward 7 portions 24a, 25a of deflectors 22a," 23a arepiv oted to the rearward portions 26a, 21a. respectively by means of upstanding pins 50. As clearly shown in Figure 8, the rearward portions 26a, 21a

carry the pins 50 having threaded upper ends 5| I By the which are engaged by'thumb nuts 52. use of the pivotal mounting for the forward vane portions of the deflectors, in conjunction with the other adjustable feature shown, it is possible to swing each-forward portion about a pin .50 and also to move. it transverselyand longitudinally of the discharge mouth. This construction gives a wider range of control. 1

In order to swing the forward vane portion of a deflector about'its pin 56, the thumb nut is loosened to ease the pressure between the adja- .cent faces 53, 54 of the forward and rearward portions, respectively, permitting turning of the forward vane portion. After the forward vane portion is set atthe desired angle, the thumb nut 52 istightened, to prevent movement of the deflector by the fuel stream.

It will be noted from an inspection of Figures to the fuel conduit, a slight pocket is formed between the includedside wall of the conduit and the rearward portion of the deflector. However,

these pockets do not offer any resistance to the 2, 6, and 7, and especially the latter two, that a 7 when a deflector is moved inwardly with respect flow of fuel through the conduit as it will. be"

clearly understood that the fuel which is lodged in them will merely remain dormant. Uponretraction of the deflector; the oncoming fuel will i carry this dormant-fuel toward the distributor.

Having described my invention, I claim the following as new and useful in the art to which the structures pertain,

I claim: 7

1. In'combination, a firebox having a wall with an opening therein a stoker feed conduithaving its discharge end communicating with said firebox-through said opening, means for advancing fuel through said conduit, 2. fuel distributor adjacent the discharge end of the conduit having a face provided with a plurality of jetopenings for discharging a pressure fluid propelling blast and including a distributor plate extending forward from said face below said jet openings, a pairof upstanding fuel deflectors oppositely disposed one at each side. of the discharge end;

of the conduit and positioned to act upon the fuel prior to the action thereon of the pressure fluid blast, each of said fuel deflectors including a rearward portion and a forward vane portion angularly related with respect to said rearward portion, said rearward portion being movable to move said forward portion to intersect the face of the fuel distributor at different points transversely arranged with respect to the firingopening and means for so moving said rearward por 7 tion.

2. In combination, a firebox having a wall with an opening therein, a stoker feed conduit having its discharge end communicating with said firebox through said opening, means for advancing fuel through'said conduit, a fuel distributor adjacent the :discharge end of the conduithaving a face provided with a plurality of jet openings for discharging a pressure fluid propelling blast and including a distributor plate extending forward from said face below said jet openone at each side of the discharge mouth of the ings, a pair of fuel deflectors oppositely disposed y conduit and positioned to act upon the fuel prior to the action thereon of the pressure fluid blast, each of said fuel deflectors including a rearward portion and a fuel deflecting forward portion pivotally mounted on an upstanding axis with respect to said rearward portion, the rearward portion of each deflector being mounted to extend obliquely with respect to the vertical medial plane of the conduit, and means operating each deflector independently of the other for bodily moving the said deflectors and their axes longitudinally and transversely of the conduit.

3. In combination, a firebox having a wall with an opening therein, a stoker feed conduit having a discharge mouth communicating with said firebox through said opening, means for advancing fuel through said conduit, a fuel distributor adjacent the discharge mouth of the conduit having a face provided with a plurality of jet openings for discharging a pressure fluid fuel propelling blast and including a distributor plate extending forward from said face below said jet openings, a pair of upstanding fuel deflectors oppositely disposed one at each side of the discharge mouth of the conduit, each deflector including a forward fuel deflecting vane portion which extends in the direction of the flow of fuel through said conduit, and a rearward portion extending angularly with respect to the forward vane portion toward the adjacent side of the conduit and being mounted to extend obliquely with respect to the vertical medial plane of the conduit, said rearward portion being movable to move said forward portion to intersect the face of the fuel distributor at different points transversely arranged with respect to the firing opening and means for so moving said rearward portion.

4. In combination, a firebox having a wall with an opening therein, a stoker feed conduit having a discharge mouth communicating with said firebox through said opening, means for advancing fuel through said conduit, a fuel distributor adjacent the discharge mouth of the conduit having a face provided with a plurality of jet openings for discharging a pressure fluid fuel propelling blast and including a distributor plate extending forward from said face below said jet openings, a pair of upstanding fuel deflectors oppositely disposed one at each side of the discharge mouth of the conduit, each deflector including a, forward fuel deflecting vane portion which extends in the direction of the flow of fuel through said conduit, and a rearward portion extending at an obtuse angle from the forward vane portion toward the adjacent side of the conduit and being mounted to extend obliquely with respect to the vertical medial plane of the conduit, said rearward portion being movable to move said forward portion to intersect the face of the fuel distributor at different points transversely arranged with respect to said firing opening and means for so moving said rearward portion.

5. In combination, a firebox having a wall with an opening therein, a stoker feed conduit having a discharge mouth communicating with said firebox through said opening, means for advancing fuel through said conduit, a fuel distributor adjacent the discharge mouth of the conduit having a face provided with a plurality of jet openings for discharging a pressure fluid fuel propelling blast and including a distributor plate extending forward from said face below said jet openings, a pair of upstanding fuel deflectors oppositely disposed one at each side of the discharge mouth of the conduit, each deflector including a forward vane portion and a rearward portion, the forward portion of each deflector being pivotally mounted on an upstanding axis with its respective rearward portion and each rearward portion being mounted to extend obliquely with respect to the verticalmedial plane of the conduit, each forward vane portion being independently adjustable about its upstanding axis, and means for moving independently the rearward portion of each deflector obliquely with respect to the vertical medial plane of the conduit whereby the upstanding axis of each forward'vane portion is shifted longitudinally and transversely of the conduit, said deflectors forming an expansible and contractible mouth for said conduit shiftable longitudinally and transversely thereof.

6. In combination, a firebox having a wall with an opening therein, a stoker feed conduit having a discharge mouth communicating with said firebox through said opening, means for ad vancing fuel through said conduit, a fuel distributor adjacent the discharge mouth of the conduit having a face provided with a plurality of jet openings for discharging apressure fluid fuel propelling blast and including a distributor plate extending forward from said face below said jet openings, a pair of upstanding fuel deflectors oppositely disposed one at each side of the discharge mouth of the conduit, each deflector including a forward vane portion and a rearward portion, the forward vane portion of each deflector beingpivotally mounted with its obliquely with respect to the vertical medial plane of the conduit whereby the upstanding axis of each forward vane portion is shifted longitudinally and transversely of the conduit, said deflectors forming an expansible and contractible mouth for said conduit shiftablelongitudinally and transversely thereof.

. '7. In combination, a firebox having a wall with an opening therein, a stoker feed conduit having its discharge end communicating with said firebox through said opening, means for advancing fuel through said conduit, a fuel distributor adjacent the discharge end of the conduit having a face provided with a plurality of jet openings for discharging 'a pressure fluid propelling blast and including a distributor plate extending for ward from said face below said jet openings, a.

pair of upstanding fuel deflectors oppositely disposed one at each side of the discharge end of the'conduit and positioned to act upon the fuel v prior to the action thereon of the pressure fluid blast, each of said fuel deflectors including a rearward portion and a forward vane portion 'angularly related with respect to said rearward respective rearward portion on an upstanding axis disposed rearward of said face and each,

Images