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Патент USA US2257287

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Sept. 30, 1941.
c. v. THORSELL
2,257,287
GRATE BAR
Filed June 1, 1939
INVENTOR
CARL V, 77/0R5ELL.
2,257,287.
Patented Sept. 30, 1941
‘UNITED ‘STATES PATENT : OFFICE
"
7 Carl V. ThorsellQWest Hempstead, N. Y., assignor _
r
to Combustion Engineering Company,- Inc.,
New York, N. Y.
Application June 1, 1939, Serial No. 276,760
3 Claims. (01. 110-74)
adjacent bars to the fuel bed. Some of the air
The present invention relates to improvements
in that type of grate bar having passages there
in for the flow of air into a chamber below the
grate bars and thence up between adjacent bars
into the fuel.
Grate bars of this type are hollow so that air
may enter a bar at one end from a primary air
chamber and flow through a passage extending
longitudinally of the bar to a secondary air
chamber and thence upwardly between adjacent
may also pass through openings 26 and 21 in the
end and top wall of the bar near the head
thereof.
Mounted on the bottom wall 22 of the bar at
or adjacent the rear edge of air outlet 25 near
the toe end is a baffle plate 30 extending up
wardly into the air passage 20. The ba?le plate
Ellis inclined forwardly toward the toe of the
bar and extends across the air stream passing
through passage 20 so as to direct air against
the inner wall or toe of the bar to maintain it
cool. Baffle plate 38 is provided with an elon
on its under side with an opening near the head
gated slot 3! so that it may be adjustably
or retort end of the bar communicating with
the primary chamber and a similar opening at 15 mounted on a bolt 32 carried on the bottom wall
of the bar and held in place by a nut 33. This
the ‘toe end of the bar in communication with
mounting of the ba?le permits it to be adjusted
the secondary air chamber, these openings com
so that it may be projected into the air passage
municating with the longitudinal air passage in
20 to the‘ extent desired to provide for cooling
the bar. An object of the present invention is
of the toe of the bar. Ba?le plate 30 may also
to provide means for regulating the flow of air
be adjusted to restrict the e?ective area of out
through the interior of the bar and directing
let 25 and thus regulate the flow of air from the
it against the toe of the bar to cool the latter.
air passage 23 acting as a sort of dam, and
In the rawing, Fig. 1 is a longitudinal sec
forcing more air to pass through the openings
tional view through part of a stoker provided
26 and 21 at the head of the bar.
with grate bars embodying the present invention;
It is understood that the rocker bar I6 and
and
?ange or key I‘! and the lugs l8 on the recipro
Fig. 2 is a sectional view on the line 2—2 of
cable bars may be located near the toe end of
Fig. 1.
the grate bar I5 and that air chamber M might
In Fig. 1 the numeral 10 designates a wall of
be
the primary air chamber and air chamber
the retort of a stoker furnace and H the outer
53 the secondary air chamber. The air would
wall of a secondary air chamber located beneath
bars into the fuel carried by the bars. To pro
vide the circulation of ‘air the bar is provided
the grate. The intermediate partition l2 sepa
rates the primary air chamber l3 from the sec
ondary air chamber I4. The grate bars I5 rest
upon the walls l0 and H closing the top of the air chambers. Alternate bars are reciprocable
and a rocker bar l6 extending transversely of the
grate has a flange or key I“! engageable between
the lugs IE on the reciprocable bars for rocking
them to feed the fuel away from the retort.
As mentioned above the grate bar I5 is hol
low and has an air passage 20 extending longi
tudinally of the bar, the passage being de?ned
by the top wall 21, bottom wall 22 and the side
walls 23 of the bar. In the bottom Wall 22 near
the head end of the bar is an opening 24 placing
passage 20 in communication with the primary
air chamber l3 while at the toe end of the bar
the bottom wall 22 is formed with an opening
25 placing passage 20 in communication with
the secondary air chamber 14. Air supplied to
the primary air chamber l3 flows through the
opening 24 along the passage 20 in the bar and
out through the opening 25 into the secondary
air chamber [4 and thence upwardly between 55
then ?ow from chamber l4 through opening 25,
be directed into the toe of grate bar 15 by damper
30 and ?ow thence through bar passage 20 and
downwardly through opening 24 into secondary
air chamber i3 and up between adjacent bars.
Some of the air would pass out through openings
26 and 27.
What I claim is:
1. In a grate bar having a longitudinal air
passage defined by the top, side and bottom walls
of the bar and extending from its head end to
its toe end with openings in said bottom wall
adjacent the head and toe of the bar for placing
said passage in communication with air com
partments of a stoker so that air may flow
through the bar from its head end to its toe end;
a ba?le plate extending into and across said air
passage from thelower wall of said bar near the
rear edge of the air opening adjacent the toe of
the bar and inclined toward said toe for direct
ing air flowing along said passage against said
toe.
2. In a grate bar having a longitudinal air
passage de?ned by the top, side and bottom walls
2
'
2,257,287
of the bar and extending from its head end to
its toe end with openings in said bottom wall
adjacent the head and toe of the bar for placing
said passage in communication with air com
partments of a stoker so that air may flow
through the bar from its head end to its toe end;
a movable ba?‘le plate extending into and across
said air passage from the lower Wall of said bar
near the rear edge of the air opening adjacent
the toe of the bar and inclined toward said toe 10
for directing air ?owing along said passaf-imv ' _
against'said toe; and means for adjustably sup
porting said battle on said bottom wall of {said
bar.
‘
>
3. In a grate bar having a longitudinal air 15
passage de?ned by the top, side and bottom walls 7
of the bar and extending from its head end to its,
toe end with openings in said bottom wall adja
cent the head and toe of the bar for placing
said passage in communication with air com
partments of a stoker so that air may flow from
the head to the toe end of the bar; a movable
ba?le plate extending upwardly from the bottom
wall of said bar into said air passage from a point
adjacent the rear edge of the air opening at the
toe end of said bar and inclined towards said toe
for directing air against the internal Wall of said
toe; and means for adjustably supporting said
ba?le plate onrsaid bottom Wall.
'
CARL V. THORSELL.
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