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Патент USA US2116115

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May 3, 1938,
W ` .
' w. T. HAÑNA
Y Filed Deals, 1930
_s Sheets-sheet 1
~~` K
BY \
¿um NL
May 3, 1938.
2,116,115 Y
fw. T. HANNA
Filed Dec. 13,"1930
s _sheets-sheet 2 -
Patented May 3, 193s
N ,'UNl'riezo>> STATES
" " 1' 2.116,1?15w i
William Thompson Hanna, Cincinnati, Ohio " ‘
" ffApplicatienpeœmber
" "
" feclaims. 1a_„§1s3o,
(ci. 11o-„101)“`
sensi Nu. stanzia
receives fuel from a hopper conveyor (not shown) 1
customarily located beneath1 the 1 locomotive
This invention relates to stokers in general and
c "particularlysuch as may beused upon locomo
5 " vide a‘ stoker whicliis simpleand durable in con~
c struction and efficient in action.
` 1.
Rotatably mounted in the conduitl22 and suit
ably _driven by ’mechanism „(not shown), ‘is a l 1
transfer conveyor 25 in the form of a spiral vane
`1 ` tives
the `objects
‘1 the
1 c `invention
.c c
is to pro
or worm and `its forward‘end projects a substan
This 1and other objects, general and particu
v`lar,` will] bebest'seen byrefer'ence to the accom- ` 1
c panying drawings, in which:`
` , 1 1
10 Fig. 1 is alvertical axial section throughs.` stok
tial distance into thegconduit 2i. The blade of
`the conveyor` 25 has its forward end tapered
for a distance substantially the extent of its pro- l0
jectionbeyond the end` of the conduit 22, and it c
ing mechanism as shownmounted on fthe back 1 has been found in practice thatïthis assists in
head ‘of a locomotive;` c
1 1
1‘ .c
Fig. 2 is atop‘plan vicewlpartly ‘1in section elevating the fuel into the fuel supplyhousing
tion) showing fuel manipulating worms;
Fig. 3 is` an enlargedjside elevationlpartly
_ Referring particularly to1Figs'. 1 and'2`, it will 15
seen that _within the housing Hand adjacent
1 in section)` of a tapered wormembodying the in- t be
the `firing opening I6 there are mounted revolu
Fig. 4 is a detailed side elevation `of the worm
1 >shown in Fig. 3, illustrating diagrammatically the
20 double taper profile of the periphery of thespiral
` Fig. 511is a1 partiallongitudinal sectional view
blelmembers 53‘and 54. These members form
fuel conditioning 4and handling rneans‘whlch act
upon‘the fuel entering the housing `from the 20
conduit 22 to place the same inthe most advan
¿tageous conditlon‘for presentation to the fire
and particularly ¿ to reduce any substantially
,of the worm shown in Fig. 3,1showing character
solidified masses thereof `which may be formed
l istics of the vane structure in relation to the ' 'as
a resultV of coherence of the parts or particles 26
‘12511h1ub portion.`1 ‘1
_ 1
Referring particularly to Fig. 1 of the draw.. 1 under pressure or` otherwise. ,Such meansalso
to advance the conditioned fuel tothe
" ings, the1stoker mechanism is shown in connec . serves
distributing means in a manner‘to insure ef
tion with the fire box"|4 of a locomotive in which
thebusual back head i5~is provided with a fir
30 ingopening I6. Surrounding the firing opening
fective action thereof. Thermernbers 53 and 5I,
as shown, are in the form of spiral .worms or 30
supplyhousing- l1 having the‘usual hand-firing
opening I8. Mounted upon the fuel supply hous
vanes tapering toward their free forward ends.
This taper may be made to vary in degree in
different portions of the member as diagram
utor plate 20; Steam pressures of different in
tensities may be supplied to different portions
length of the vane or blade. With this con
and rigidly mounted on the back head is a fuel
1 ing l1 and positioned within the firing opening t maticaliy illustrated in Fig. 4. It will be seen
that the taper in the forward portion is‘greater 35
35 I6 are suitable fuel distributing means includ
ing,1 a multiple blast-chamber l! and a distrib-` than in the rear portion, the change in taper oc
of the blast chamber i9.
The lowerportion of the‘housing I1 forms a
‘ fianged. `conduit section to which is rigidly at
tached an extension conduit 2i, having its outer
endarranged to form a universal bearing sup
curring at a point substantially midway in the
struction the fuel handling capacity of each
worm, or screw, is materially increased at its 40
larger end. A sectional view of one of these
Amembers is shown in Fig. 5 in which it will be
evident that the rear face of the vane or blade
port vfor the forward end of a transferconduit is substantially at a right angle to the axis of
45 22. This bearing "support is accomplished by rotation and the forward face is arranged at a 45 f
means of apartial spherical `recess arranged in
the end of the conduit 2l, in which is journaled
a member 23 in theform of a section of a sphere
rigidly secured to the transfer conduit 22 and
50 retained in position by a retaining ring 24 rig
Y idly secured 1in any suitable manner to the end
face of the conduit. The extension conduit 2i
.is preferably substantially circular in cross-sec
tion with an expanding cross-sectional area as it
t5 approaches the firing opening. The conduit 22
substantial angle to the rear face. `'This forma- `
tion of the member has been found to` give very
satisfactory results.
Referring‘again particularly to Fig. 2, the fuel
supply housing i1 has a portion 55 arranged in 50
the form of a, ledge over which the `fuel flows l `
as it is carried into the nrlng opening by the
action‘of the members 53 and 54. Not only is it
desirable-to provide a control for the volume
of fuelpassing over the ledge 55, but it is also 55
advisable to have means for directing more or
less volume toward the right side or toward the
left side of the ñring opening as occasion re
quires. This result may be accomplished in var
ious ways, but I have here shown laterally ad
justable members 55 and 51 slidably mounted in
_the respective sides of housing I 'l and slidable
over the ledge 55 and blast chamber I9.
members 55 and 51 are pivotally-connected to op
10 erating levers 58 and 59 by means of which the
'I‘he form and arrangement of the fuel-han
dling and conditioning members 53 and 54 in
sure efficient operation thereof and the passage
of the fuel to the distributing means in the most
advantageous manner and condition. The driving
mechanism for the fuel-handling and condi
tioning »members in the form shown is an as
sembled unit.
As many other embodiments may be made of
lateral position of the said members may be the features of this invention without departing 10
controlled each independently. In this way, from the scope thereof, it is to be understood
greater or lesser volume may be permitted to flow that all matter herein set forth or shown, is to
be interpreted as illustrative and not in a lim
over the said ledge and the quantities of fuel . iting
directed toward the right or left sides may be
I claim:
varied. These adjustable members are prefer
1. In >a stoker mechanism, the combination
ably arranged for adjustment in an angular di
rection relative to the edge of the ledge 55 as
duit provided with means for moving fuel from
shown clearly in Fig. 2.
Power for the operation of the stoker may be a source of fuel supply to said entrance, the lower
forward edge of said conduit providing a ledge 20
supplied by any suitable power device and trans
mitted therefrom to the moving elements in any over which fuel ñows into said entrance, means
convenient manner.
Referring to Figs. 1 and 3, the worms or fuel
25 handling members are driven from a worm 80
suitably driven by an en‘gine (not shown). The
worm 8U, through suitable worm gears 84, drives
shafts 85 and 55, which respectively drive the
worms 53 and 54. -Referring to Fig. 3, the shaft
30 86 drives its worm 54 through lbevelled miter
gears 89 and 90. Similar miter gears are pro
vided for the worm 53.
for distributing fuel fed to said entrance upon
and over the fire, and fuel conditioning and reg
ulating means comprising a rotary worm inter
posed between said fuel moving means and said 25
distributing means and recessed in said conduit
generally below and to the rear of said edge and f
extending transversely of said conduit, for- trans
forming the fuel into form relatively thinner
than the bulk of the fuel in the conduit, said 30
worm being tapered and the taper of the larger
part of said worm having a smaller angle of in
clination than the taper of the smaller part.
In the operation ofthe stoker mechanism,
the conveyor 25 transfers fuel forwardly from
2. For use in a locomotive stoker having a
35 the locomotive tender (not shown) and delivers
the coal into the fuel-supply housing I1, where, conduit extending to and embracing a firing
due to the contour of this housing, the fuel is opening of a fire box, the lower forward edge
presented to the fuel-handling or conditioning of said conduit forming a ledge over which fuel
members 53 and 54. Further movement of the flows; a tapered fuel handling screw recessed in
fuel is controlled by the action of these members said conduit generally below and to the rear of
53 and 54 and the fuel is thereby caused to pass said ledge and pointing from the side of said
conduit toward the center thereof, said screw
into the fire box, above the level of the fire, flow
ing over the ledge 55 which extends across the having a single flight and the angle of incli
firing opening. The fuel subsequently falls upon nation of the taper of said screw being greater
and flows by gravity over the blast chamber I9 at the small end of the screw than at the larger
and upon the distributing plate 20 from which end thereof whereby the fuel handling capacity
it is scattered over >the fire by means of the at the larger end is materially increased.
blasts of steam emitting from the jets of the blast
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