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Патент USA US2105457

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‘_Jan. ll, 1938.
J. H. |-cHTER
2,105,457
FUEL DISTRIBUTING MECHANISM
Original Filed March 2, 1932
ß‘
' ATTORNEY,
Patented Jan. 11, 1938
UNITED STATES PATE
2,105,457
FUEL DISTRIBU'I'ING MECHANISM
John H.‘Ichter, Ashley, Pa., assigner, by mesne
assignments, to The Standard Stoker Com
pany, Inc., New York, N. Y., a corporation of
Delaware
Application March 2, 1932, Serial No. 596,224
Renewed October 3, 1936
6 Claims. (Cl. 110-101)
This invention relates to fuel distributing restricted, but may be used equally as well with
means, for use in connection with mechanical other types of stokers. Throughout the specistokers.
'
iication, the term “forward” is employed to de
5.
It is an object of the invention to provide fuel
distributing means arranged to spread fuel uni
formly and evenly over the entire ñrebed area of
a ñreboX.
It is a further object of the invention to pro
vide a iireboX with a riser conduit in communi
cation with the firing opening in a wall thereof
and through which opening fuel is delivered to
pressure íiuid blasts, said blasts being directed
to discharge fuel of themselves to substantially all
portions of the iirebed, and provide an auxiliary
or second set of pressure fluid blasts to prevent
packing of fuel in the upper end of the riser
conduit and assist in moving fuel to the ñrst men
tioned blasts and in discharging it into the
iirebox.
It is a further object of the invention to pro
20
vide a riser conduit in communication with the
firing opening and through which fuel is forced
to pressure iiuid blasts directed to scatter fuel of
themselves to substantially al1 parts of the fire
e
bed, and provide an auxiliary set of fluid blasts
rearward of the upwardly forced stream of fuel
so the portion of the riser conduit adjacent the
ñring opening can be of decreased vertical di
mensions whereby the Stoker will occupy a mini
Si) mum part of the firing opening.
Further objects of the invention are to provide
jet openings or holes drilled perpendicular to the
forward face of a jet casting or nozzle member,
provide means for eliminating clogging of the
fluid blasts rearward of the upwardly forced
l
stream of fuel, and provide a jet casting having
a novel configuration and design.
Other objects and advantages of the invention
will be apparent during the course of the follow
ing description, and from the claims and draw
ing, in which
Fig. 1 is a central longitudinal section of a por
tion of a locomotive illustrating the invention
applied thereto with parts of the stoker and fuel
45 distributing mechanism in section and other
parts in side elevation;
Fig. 2 is a horizontal sectional view taken on
line 2--2 of Fig. 1; and
Fig. 3 is a front elevational view of the nozzle
50 member and shows the pipe lines leading there
to.
For the purpose of illustration my invention is
shown as applied to a locomotive stoker, though
it will become apparent as the description pro
.55
ceeds that its application is not necessarily so
note the general direction of the fuel as it passes
through the stoker into the ñrebox.
A portion of a locomotive is designated gen
erally at lil; at l i its boiler iirebox provided with
grates l2, and a backhead i3 with a firing open
ing I4 therein.
The forward tubular conduit section or riser
of a flexible conduit system of the Stoker is
designated as l5 and extends from a point
beneath and adjacent the cab deck I6 to the
firing opening ill of the boiler. Fuel is delivered
to the locomotive and forced forwardly and up
wardly through the riser by suitable Stoker
mechanism, not shown. The riser l5 is carried
from the backhead I3 by a supporting bracket Il.
From its lower end the riser l5 extends up
wardly and forwardly, flaring outwardly at its
upper end, and communicates with the firing
opening i4 through its laterally spreading and
substantially horizontal mouth portion I8. The
mouth portion i3 is provided with the flanges lil
for attachment to the backhead by suitable fas
tening means, as by bolts, not shown. This
mouth portion is formed with an upstanding wall
20 at each side thereof to which a distributor
plate 2l is detachably connected by any suit
able means, such as studs Lit. The distributor
plate 2i forms an extended floor portion of the
riser and extends through the firing opening into
the ñrebox.
A nozzle 22 is mounted between the distributor
plate 2| and an upright wall 23 which is offset
rearwardly a comparatively short distance with
respect to the upstanding walls 28 to form a
recess in the mouth portion of the riser to receive
the nozzle. The nozzle is provided on each side
with a lug 2G, and studs 25 extending through 40
these lugs secure the nozzle to the riser. In ver
tical longitudinal section the nozzle is of substan
tially L-shape, having a rear portion 25 fitted in
the recess in the mouth portion of the riser and
the other portion ‘2l lying upon and disposed
above the top surface of the distributor plate.
A plurality of L-shaped passages 28 are formed
in the nozzle and pressure fluid such as steam is
supplied to these passages by a desired number
of pipe lines 29. The nozzle 22 is provided with 50
horizontally directed jet openings 36 in its front
face for emitting a fan-shaped blast of fluid
across the distributor plate 2l. The front face
of the nozzle is formed of a center face portion
3| and side face portions 32 and 33. Each of the
2,105,457
face portions is straight and in plan view the
side face portions 32 and 33 slope outwardly and
rearwardly from the ends of the central face por
tion 3 I. ' The jet openings 30 are drilled substan
tially perpendicular to the face portions in which
they are contained whereby the time required for
the drilling operation during machining of the
nozzle is less than that required when the jet
openings are drilled on an angle with respect to
10 the front face of the nozzle. I have discovered
from actual experience that byV drilling the jet
openings 30 perpendicularly to the side faces 32
and 33, the cutting action of the steam upon the
the fuel over the side portions 4| of the dis~
tributor plate into the flrebox and a part of the
fuel discharged into the firebox by the blasts from
the jet holes 38 is directed by curved ribs 42 to
the extreme rear corners of the iirebox.
'I‘he face 43y in which the jet `holes 38 are con
tained is offset rearwardly from the inside sur
face of the rear wall 36 of the riser conduit
thereby forming a ledge 44 which maintains the
fuel moving into the range of the blasts from 10
the Vjet holes 38 forward of the face 43 thus pre
venting probable clogging of the jet holes` 38.
Although the chamber 35, jet holes 38 and ledge
jet openings is diminished, thereby prolonging V44 are shown as being formed in the riser con
15 the life of the nozzle 22.
By the term “cutting duit it is apparent that any or all of these ele 15
action” I refer to the inherent qualities of steam ments may be contained in one or more separate
to attack sharp, thin corners and wearing these parts secured to the riser.
Were the rear jet holes 38 not provided, it
corners to such an extent that the jet openings,
after a short period of use, become oval in shape. kwouldY be necessary to force the fuel forwardly
and upwardly through the riser and forwardly 20
20 This distortion in the shape of the jet nozzle
seriously affects the proper distribution of coal. through the horizontal mouth portion lß to the
It is preferable that one or more jet openings jet openings 30. Since the jet openings 33 are
be drilled in each of the angularly related face positioned in the firebox the fuel would be forced
portions 3i, 32, and 33, and that the iet openings forwardly through the mouth portion i8 a dis
2.5 in each of the face portions be in communication tance greater than would be the case if the jet
openings 3!) were located outside the ñrebox
with a passage or passages in the nozzle separate
from the passages with which the jet openings whereby packing of the fuel would occur in the
upper end of the riser, The provision of blasts
in the other face portions communicate where
by the pressure of the fluid blasts issuing from at the rear >of the upwardly moving stream o'f
the jet openings in> each of the angularly related fuel, in addition to assuring uniform delivery to 30
face’portions can be controlled independently.
the main or forward blasts, prevents accumula
The jet openings 38 are located in the firing tion and packing of fuel in the upper end of the
opening between the inside and outside surfaces riser.
Another advantage secured by provision of the
of the backhead, and the jet openings in the
side face portions 33 and 33 of the nozzle are rear jet holes 38 is that the top wall 45 can be 35
directed to discharge fuel of themselves to the` ñat and the height of the mouth portion i8 will
sides and rear portions of the ñrebox, without
the necessity of deñecting ribs. The riser con
duit is provided withr a removable cover section
40 34, whereby access may be had to the interior
of the riser conduit.
'
A transverse chamber 35 is formed in the upper
portion of the rear wall 36 of the riser conduit
on an elevation slightly above that of the top
surfaces of the distributor plate 2| and nozzle
22. A pipe line 31 supplies a pressure fluid to
the chamber 35 at the end thereof.
A broad
transverse row of jet holes 33 in communication
with the chamber 35 is provided primarily to
50 issue a fluid to impinge upon and move the fuel
moving upwardly in the riser conduit over the
top surface 39 of the nozzle and onto the dis
tributor plate, in front of the jet openings 38,
and the fluid blasts emitting from the jet open
55 ings 30 scatter the fuel over the ñrebed.
The top surface 39 of the nozzle slopes down
wardly and forwardly from the rear end to the
forward end of the nozzle and is disposed in a
plane substantially parallel to the direction of
be a minimum whereby the delivery end of the
riser occupies a relatively small portion of the
ñring opening.
,
l
In operation fuel is delivered upwardly through 40
the riser conduit into the range of the fluid blasts
issuing from the rear jet holes 38 which move
the fuel forwardly uniformly into the blasts from
the forward jet openings 38 and the last men
tioned blasts discharge it over the distributor
plate 2| to all portions of the firebed. A part
of the fuel that would normally be deposited in
the center of the ñrebox is deflected in its course
by the projection 4U and spread over the sides
of the flrebox. Some of the fuel moved forward 50
by the rear blasts passes over` the side4 portions
4l of the distributor plate into the'ñrebox and
a part of the fuel passing over the side portions
4l strikes the ribs 42 on the distributor table
and is directed to the extreme rear corners of
the ñrebox.
It is apparent that I have provided novel fuel
distributing means that functions efficiently to
distribute fuel evenly and uniformly over all parts
60 travel of the fuel moved by the fluid blasts from
of the firebed area and will obtain the other 60
the jet holes 38. At the central portion of the
nozzle and superimposed upon the top surface
39 thereof is a three sided pyramid shaped pro
jection 4B designed to deflect a portion of the
65 fuel that would normally be delivered into the
range of the fluid blasts from the jet openings
in the central face portion 3| into the range of
the ñuid blasts from the jet openings in the side
face portions 32 and 33 whereby the deilleoted
70 fuel will be spread over the sides of theV firebed
eliminating heavy fires in the center of the ñre
box.
The fluid blasts issuing from the jet holes 38
in addition to assuring a uniform ñow of fuel
to the main jet openings 36 discharge a part of
objects set forth.
is
1. As a new article of manufacture, an integral
cast metal fuel distributor nozzle having a fluid
admission end and a fluid emission end, jet open
ings in> the last named end of said nozzle, said
nozzle having a top surface above the plane of
said jet >openings forming a support for the fuel
passing thereover, and a fuel directing projection
on said top surface extending from the fluid ad
mission to the iluid emission end of said nozzle,
said fuel directing projection including a pair of
Yinclined'faces intersecting in a plane vvertically
70
bisecting the nozzle in the direction of flow and
extending laterally a greater distance atthe vfluid. 75
2,105,457
emission end of said nozzle than at the ñuid
admission end thereof, that portion of said top
surface which extends laterally of said fuel direct
ing projection being ñat and uninterrupted.
2. As a new article of manufacture, an integral
cast metal fuel distributor nozzle having a fluid
admission end and a fluid emission end, jet open
ings in the last named end of said nozzle, said
nozzle having a top surface above the plane of
10 said jet openings forming a support for the fuel
passing thereover, and a fuel directing projec
tion on said top surface, said fuel directing pro
jection including a pair of inclined faces inter
secting in a plane vertically bisecting the nozzle
15 in the direction of flow and extending laterally
a greater distance at the fluid emission end of
said nozzle than at the ñ-,uid admission end
thereof, said fuel directing projection being dis
posed a greater distance above said top surface
20 at the ñuid emission end of said distributor
nozzle than at the fluid admission end thereof,
that portion of said top surface which extends
25
laterally of said fuel directing projection being
unobstructed.
3. As a new article of manufacture, an inte
gral cast metal fuel distributor nozzle having
fluid admitting openings and having a fluid emit
ting end including a central face portion and side
face portions angularly related with said central
face portion, jet openings in said central face
portion and each of said side face portions, said
nozzle having a top surface forming a support
for the fuel passing thereover, and a fuel di
recting projection on said top> surface, said fuel
directing projection including a pair of inclined
faces intersecting in a plane vertically bisecting
the nozzle in the direction of flow, said inclined
faces at the fluid emitting end of said distributor
nozzle extending laterally to the extremities of
40 -said central face portion and gradually merging
with said top surface at the opposite end of said
distributor nozzle.
4. As a new article of manufacture, an inte
gral cast metal fuel distributor nozzle having a
45 fluid admission end and a fluid emission end, jet
openings in the last named end of said nozzle,
said nozzle having a top surface above the plane
of said jet openings forming a support for the
fuel passing thereover, and a fuel directing pro
jection on said top surface extending from the
fluid emission end of said nozzle to the fluid ad
mission end thereof, said fuel directing projec
tion including a pair of inclined faces intersect
ying in a plane vertically bisecting the nozzle in
the direction of flow and extending laterally a
greater distance at the fluid emission end of
said nozzle than at the ñuid admission end
thereof, that portion of said top surface which ex
3
tends laterally of said fuel directing projection
being fiat and uninterrupted and sloping down
wardly.
5. In combination with a flrebox having a wall
provided with a firing opening therein, a riser
conduit outside the flrebox communicating at its
forward end with said opening, said riser conduit
arranged to receive fuel at a point below said
ñring opening and conduct the same upwardly
toward said firing opening in substantially a core
shaped mass, a distributor plate extending from
the forward side of said riser conduit into said
ñrebox forward of the named wall of the latter,
a main set of jets adjacent the firing opening
and disposed rearward of the forward terminus 15
of said distributor plate arranged to sweep a
blast of pressure fluid substantially across the
distributor plate throughout the width thereof for
projecting fuel into the ñrebox, and an auxiliary
set of jets rearward of the main set of jets and 20
disposed thereabove in a transverse row extend
ing laterally beyond the respective end jets of
said main set of jets, the auxiliary set of jets be
ing directed forwardly in approximate parallel
relation and arranged to sweep a blast of pres
sure iluid substantially across the width of said
riser conduit downwardly at a slight angle toward
said distributor plate and toward the main set
of jets.
6. In combination with a ñrebox having a. 30
wall provided with a firing opening therein, a
riser conduit outside the ñrebox communicating
at its forward end with said opening, said riser
conduit arranged to receive fuel at a point below
said firing opening and conduct the same up
wardly toward said ñring opening in substantially
a core shaped mass, a distributor plate extending
from the forward side of said riser conduit into
said i'lrebox forward of the named Wall of the
latter, a main set of jets adjacent the firing open 40
ing and disposed rearward of the forward termi
nus of said distributor plate arranged to sweep
a blast of pressure fluid substantially across the
distributor plate throughout the Width thereof
for projecting fuel into the ñrebox, an auxiliary
set of jets rearward of the main set of jets and
disposed thereabove in a transverse row extend
ing laterally beyond the respective end jets of
said main set of jets, and fuel directing means
intermediate the two sets of jets, the auxiliary set
of jets being directed forwardly in approximate
parallel relation and arranged to sweep a blast
of pressure fluid substantially across the width
of said riser conduit downwardly at a slight angle
toward the main set of jets and toward the fuel
directing means.
JOHN H. ICHTER.
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