US2065552A - Stoker construction - Google Patents

Description

Dec. 29, 1936. 1 BEERS 2,065,552

STOKER CONSTRUCTION Original Filed Oct. 10, 1932 4 Sheets-Sheet l Dec. 29, 1936. I R. L. BEERS STOKER CONSTRUCTION Origifial Filed Oct. 10, 19 32 4 Sheets-Sheet 2 I "Z CZHBcens R. L. BEERS- STOKER CONSTRUCFI'ION Dec. 29, 1936.

4 Sheets-Shet 3 Original Filed Oct. 1 0, 1932i Elma/Mun Ro% e 1.3eers Dec. 29, 1936. 1.. BEERS' 2,065,552

STOKER GON S TRUCTI ON Original Filed Oct. 10, 1932 4 Sheegs-Sheetj4 I! Q. I

34 eel. 'zaers Patented Dec. 29, 1936 PATENT OFFICE" STOKER CONSTRUCTION Royce L. Beers, Detroit, Mich, assignor to Detroit Stoker Company, Detroit, Mich., a. corporation of Michigan Application October 10, 1932, Serial No. 637,186

Renewed May 8, 1936 23 Claims. (01. 110 115) This invention relates generally to stokers of the sprinkler type and consists of certain novel features of construction, combinations and arrangements of parts, that will be hereinafter more fully described and particularly pointed out in the appended claims.

In, the accompanying drawings:

Figure 1 is a vertical sectional View through a furnace and showing stoker mechanism embodying my invention applied thereto;

Figure 2 is a sectional view taken on the line 2-2 of Figure 1;

Figure 3 is a sectional view taken on the line 33 of Figure 1;-

Figure 4 is a sectional view taken on the line 4-4 of Figure 1;

Figure 5 is. a sectional view taken on the line 5-5 of Figure 2;

Figure 6 is a detail view of the rotor drum;

Figure 7 is a sectional view taken on the line 1-1 of Figure 6;

Figure 8 is a detail view of one of the bames;

Figure 9 is a detail view of the base plate;

Figure 10 is a detail view of one of the side 25 plates;

Figurell is a detail view of the other side plate; p

Figure 12 is a detail view of one of the air ducts to the apron tuyres.

' Referring now to the drawings wherein I have illustrated one embodiment of my invention, A is the front plate; B is the base plate; C and D respectively are the side plates; E and F respectively are the front and rear cross plates; and 3 G is the cover plate. V

H are bafiles for the side plates; I is a shaft journaled in bearings J carried by the side plates; K is a rotor drum fixed upon the shaft I between the baflles H; and L are blades fixed to the drum K. M is a 'pan projecting forwardly from the base plate B at the lower edge I of the opening 2 therein and having a curved bottom 3 substantially coaxial with the shaft I, and N is a curved plate secured upon and cooperating with the curved bottom of the pan to form a housing' forthe rotor drum K. Inthis connection it will be noted that the plate N and pan M are bolted together and that the pan detachably engages the base plate B, hence the pan may be readily removed when desired to aiford access to and replacement of the blades L.

0 is a hopper for green fuel mounted upon the plates C, D, E and F; P is an adjustable plate over which the green fuel from the hopper may be advanced by. a suitable ram or feed plate Q so that such fuel will be fed onto and will be projected rearwardly in spray form by the blades L on the rotating drum K.

R are deflector plate sections extending upll wardly and rearwardly from the rear edge of the rear cross plate F to the upper edge 5 of the opening 6 in the front plate A; S is an apron extending downwardly and rearwardly from the lower edge l of the opening 2 in the base plate B; and T is a supporting plate for the apron. U is the dead plate and V are air ducts carried by said dead plate for conducting air from the wind chamber W to the space l0 between the supporting plate T and apron "S. Preferably the apron S comprises a series of tuyre blocks ll arranged side by side and having inlet and. outlet openings I2, l3 and M respectively for air,

and thepan 'M is provided at opposite ends there- 'of with rearwardly extending ducts, l5 and 16 for air from the space H). In order that such air may be used to cool the bearings J and as-' sist in the combustion of fuel within the furnace, the baffles H for the side plates are provided with passages l1 and I8 respectively that are adapted to receive air from the ducts I5 and IS in the pan and to discharge it into the furnace just below the deflector sections R. In this connection it will also be noted that the rotor drum K is hollow and is provided with openings l9 and 20 respectively. Preferably the openings I9 are of the keyhole type and are adapted to receive suitable bolts 2| constituting anchorage stricted or narrow parts of the openings l9. Preferably the bases 22 of the blades L are recessed as at 23 for registering withthe larger parts of the openings l9 and have lateral outlet passages 24 for said air. Consequently the air from the ducts l5 and I6 will be drawn through the openings 20 in the ends of the drum and will flow through thedrum and out through the openings l9, recesses 23 and passages 24 to the space about the drum in the housing therefor. As a result the rotor drum is air cooled. Due to the rotation of the drum and the configuration of the pan M and drum housing the air is admitted at high velocity so that fine particles of the fuel are blown into the furnace and. are

prevented from settling at the front end of the grates X. Thus this air serves both the purpose of combustion and distribution of the fine fuel. In use, the fuel from the hopper 0 will be wardly in the furnace by the blades L on the romoved by the ram Q rearwardly on the plate P so that it will fall upon and be projected reartating drum K. Once within the furnace the flne fuel is burned in suspension and the coarse fuel is burned on the grates X. The apron S catches the fine material, dust, etc. However, such apron is cooled by the air from the space Ill, hence-will not burn out. Preferably the air is supplied to the wind chamber W by a blower or fan (not shown), consequently the proper pasrage of air through the ducts V, apron sections i I, ducts I5 and i 6, rotor drum K and passages I!. and i8 will be provided while the stoker is in operation.

What I claim as my invention is:

1. In a stoker, an upright plate attachable to the front of a furnace and having an opening therein through which fuel may be propelled into the furnace, a rotor housing in front of said plate and discharging rearwardly through said'opening, a chamber for air in rear of saidplate just below said opening, the top of said-chamber being inclined downwardly and rearwardly and forming an apron for said opening,.said apron having means for conducting air from the chamber rearwardly into the furnace and forwardly through the openingaforesaid into the housing,

- through which fuel may be propelled into the furnace, a rotor housing in front of said plate and discharging rearwardly through said opening, a rotor within said housing for propelling fuel through the opening, a chamber for air in rear of said plate just below said opening, and

means for conducting air to said chamber, the

top of the chamber inclining downwardly and rearwardly from the lower edge of the opening therein through which fuel may be propelled into the furnace, a rotor housing in front of said plate and discharging through said opening, a rotor within said housing adapted to propel fuel through said opening, a chamber for air in rear of said plate just below said opening, the top of said chamber inclining downwardly. and rearwardly from the lower edge of said opening and forming an apron for fuel propelled throughthe opening, means for conducting air to said chamber, and means for conducting air from the chamber into said rotor housing.

4. In a stoker, an upright plate attachable to the front of a furnace and having an opening therein through which fuelmay be propelled into the furnace, a rotor housing upon the front of the plate and discharging through said opening, a rotor within said housing adapted to propel fuel through said opening, and a chamber for air upon the rear of the plate just below the opening, the top of said chamber-inclining downwardly and rearwardly from said opening and forming an apron for fuel propelled into the 5. In a stoker, an upright plate attachable to the front of a furnace and having. anopening through which fuel may be propelled into the furnace, a rotor housing projecting forwardly from said plate and discharging through said opening, a rotor .within the housing adapted to propel fuel through the opening, an air chamber in rear of said, plate 'just beneath said opening, a dead plate in rear of said upright plate beneath the air chamber, means extending through the dead plate and conducting air to the chamber, and means for conducting air from the chamber to'the interior of the rotor housing.

6. In a stoker, an upright plate attachable the front of afurnace and having an opening through which fuel maybe propelled into the furnace, a rotor housing in front of the plate discharging into said opening, a rotor withinthe housing adapted to propel fuel through the opening, and an apron inclining downwardly and rearwardly. from the lower edge ofthe opening aforesaid, said apron comprising a series of elongated tuyre blocks arranged side by side, said blocks being provided inadjacent edges at their lower ends with outlets for air, provided at their periphery of the rotor having a recess opening toward the periphery and cooperating therewith to form a chamber for air, said chamber being in communication with the radially. extending pas-' sage aforesaid and having an' outlet passage adjacent the periphery of a said rotor.

8. In a stoker, an upright plate attachable to the front of. a furnace and having an opening therein through which fuel may be propelled into the furnace, a rotor housing projecting forwardly from said plate and discharging rearwardly through said opening, a chamber for air projecting rearwardly from said plate beneath the fuel opening therein, the top of said chamber inclining downwardly and rearwardly fromthe lower edge of said opening and constituting an apron, said inclined top being provided-with means for discharging air rearwardlyinto the furnace, and means for conducting air from the chamber for-- wardly beneath the fuel opening aforesaid to the interior of said housing, to be propelled with fuel rearwardly through saidopenings.

9. In -a.stoker, an upright plate attachable to the front of a furnace and having an Opening therein through which fuel may be projected into the furnace, a rotor housing projecting forwardly from said plate and discharging rearand having flanges projecting laterally therefrom toward and cooperating with the side plates to form passages for air leading from the inlets aforesaid toward the opening in the upright plate adjacent the bearings.

10. In a stoker, a rotor housing having side plates, a rotor shaft within said housing and extending through said plates, bearings for said shaft mounted upon the outer sides of said plates, baflle plates mounted upon the inner sides of and substantially parallel to said side plates, said baffle plates having flanges projecting laterally therefrom towardand cooperating'with the side plates to form air passages adjacent the bearings for cooling purposes, said bafile plates having openings receiving said shaft, a hollow substantially cylindrical blade carrying rotor having ends fixed to said shaft and disposed within the openings in said baffle plates, the ends of said rotor having air passages establishing communication between the interior of the hollow rotor and the air passages aforesaid.

11. In a stoker, an upright plate attachable to the front of a furnace and having an opening therein through which fuel may be propelled into the furnace, a rotor housing projecting forwardly from said plate anddischarging through said 7 opening, said housing having a pair of side plates and provided at the, bottom thereof upon the inner sides of said side plates with air'inlets, and baflie plates upon the inner sides of and substantially parallel to said side plates, said baflle plates having flanges projecting laterally therefrom to-- ward and cooperating with the side plates to form air passages leading from the inlets aforesaid toward the opening in said upright plate.

12. In a stoker, a rotor drum having connecting axially and radially extending passages for air,

blades having 'bases upon the periphery of the.

drum; said bases having recesses opening toward and cooperating with the periphery of said drum to form air chambers in communication with said radially extending passages, said chambers having air outlets adjacent the periphery of said drum, and securing means for the blades extending through said bases and said radially extending passages. 1

13. In a stoker, an upright plate attachable to the front of a furnace and having an opening therein through which fuel maybe propelled into the furnace, a rotor housing in front of said plate and discharging rearwardly through said opening, and a chamber for air in rear of said plate just below said opening, the top of said chamber forming an apron for said opening, said apron having means for conducting air from the chamber rearwardly into the furnace and forwardly.

. wardly fromsaid upright plate and discharging rearwardly throughsaid opening, and apron j tuyeres inclining downwardlyand rearwardly from the lower edge of the opening in said upright plate, said tuyres having means for discharging air rearwardly into the furnace and other means for conducting air forwardly through ,the opening aforesaid into said housing to be propelled-with fuel rearwardly through said opening.

p 15. {In a.

wardly into the furnace, a rotor housing projectbeing inclined downwardly and rearwardly and stoker, an upright plate attachable; to the front of a furnaceand having an opening ing therein through which fuel may be projected into the furnace, a substantially trough-shaped housing projecting forwardly from said plate and discharging through said opening, said housing being provided at the bottom thereof with means for receiving air from a point in rear of the upright plate, said housing having side plates and baflie plates mounted upon and substantially parallel to said side plates, said baflle plates having flanges projecting laterally therefrom toward and cooperating with the side plates of the housing to form passages for conducting air from'the receiving means aforesaid toward the opening in said upright plate.

17. In a stoker, an upright plate attachable to the frontof a furnace and having an opening therein through whichfuel may be projected into the furnace, a rotatable blade-carrying drum in front of said plate adjacent the opening therein, a housing for the drum projecting forwardly from said plate and discharging through said opening, said housing having side plates, bearings carried by the side plates of said housing, a shaft forsaid drum journaled in said bearings, baiile I plates substantiallyparallel to the side .plates of ing with the side plates of the housing to provide. therebetween passages for air extending from points :adjacent the bottom of the housing to points adjacent the opening in the upright plate,

and means associated with said housing for conducting air to said passages.

18. In a stoker, an upright plate attachable to the front of a furnace and having an opening therein through which fuel may be propelled into thefurnace, a substantially trough-shaped housing projecting forwardly from said plate and discharging rearwardly through said opening, said housing havingside plates and being provided at the bottom, thereof with inlets for air bearings carried by the side plates of said housing, a shaft journaled'in saidbearings, a blade-carrying drum sleeved upon and rigid with said shaft between ,-the side plates of said housing, and "means associated with the side "plates of said housing for conducting air from said inlets at the bottom of the housing past the bearings toward the opening in said upright plate.

19. In a; stoker, anupright plate attachable to the front of a furnace and having an opening therein through which fuel may be propelled into the furnace, a rotor housing in front of said plate and discharging rearwardly through said open,-

ing, a chamber for airin rear of said.plate just below said opening; said chamber having means for discharging air rearwardly intothe furnace, and means for conducting air from the chamber forwardly beneath the opening vinto the housing.

20. In a stoker, an upright plate attachable to the front of a'furnace and having an Qpel'ling therein through which fuel may be propelled into the furnace, a rotor housing in front of said plate and discharging rearwardly through said opening, a chamber for air in rear. of. said plate below said opening, and two meansfor conducting aire from said chamber forwardly into the rotor housingto be propelled with fuel rearwardly through the Opening in said plate, one of said means extending through said opening and discharging toward the bottom of the rotor housing, and the other of said means being beneath said opening and discharging upon the bottom of the rotor housing. I 1 r 21; In astoker, an upright plate attachable to the front of a furnace and having an opening through which fuel may be propelled into the furmice, a rotor housing in front of said plate and.

right plate having an opening therein through which fuel may be propelled into the furnace, a rotary impeller housing in front of said plate aracetates.

ranged to discharge over the lower edge of said opening, a rotary impeller within said housing, an Y apron inclining rearwardly and downwardly from the lower edge ofsaid opening and having air dis;- charge passages at its lower edge, and means for discharging air rearwardly through said passages from the lower rear edge of said apron.

23. In a stoker of the sprinkler type, a furnace front including an upright plate having an opening therein through which fuel may be propelled into the furnace, a rotary impeller housing in front of said plate arranged to discharge over the lower edge of said opening, a rotary impeller in said housing, a stationary member extending rearwardly from said furnace front, a grate in rear of said stationary member, an apron above said stationary member inclining rearwardly and downwardly from the lower edge of said opening and having air discharge passages at its lower edge, and means for discharging air rearwardly through said passages from the lower rear edge of said apron whereby any dust and fine particles of fuel deposited on said apron and discharging from the rear end thereof will-be carried bysaid air current rearward and over the grate.

' ROYCE L. BEERS.

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