US1140817A

US1140817A - Furnace-stoker for feeding coal-dust or other comminuted fuels.

Info

Publication number: US1140817A
Application number: US74320213A
Authority: US
Inventors: Charles L Heisler
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-01-20
Filing date: 1913-01-20
Publication date: 1915-05-25
Anticipated expiration: 1932-05-25

Description

C. L. HEISLER.

FURNACE STOKER FOR FEEDING COAL DUST OR OTHER COMMINUTED FUELS.

APPLICATION FILED JAN. 20, 1913- p 1 1? @17O Patented May 25, 1910.

2 SHEETS-SHEET I.

WITNESSES:

C. L. HEISLER.

FURNACE STOKER FOR FEEDI NG COAL DUST OR OTHER COMMINUTED FUELS.

APPLICATION FILED JAN-20, 1913.

1 M 817o Patented May 25, 1915.

2 SHEETQ-SHEET 2.

FIG. 3

l Vl ZNESSfiS: INVENTOR. ,MWWM Md BY ATTORNEY.

UNTTJED' STATES PATENT. @FFTQE CHARLES L. HEISLER, 0F SCHENECTADY, NEW YORK.

FURNACE-STICKER FOR FEEDING COAL-DUST OR OTHER COMMINU'TED FUELS,

Application filed January 20, 1913. Serial No. 743,202.

To all whom it may concern Be it known that 1, CHARLES L. HEISLER, a citizen of the United States, residing at Schenectady, in the county of Schenectady, in the State of New York, have invented certain new and useful Improvements in Fur- The further object is to provide a com- 7 paratively light simple and compact machine with a wide range of capacity that can be maintained and successfully operated on a locomotive; a service wherein the chances of failure must be reduced to a minimum.

In the accompanying drawings Figure 1, shows a plan view of the bottom'of the fuel hopper parts that are not directly related to my invention are broken away, as it is of usual construction. This figure also shows a plan view of the feed screw and the pocketed distributing wheel with the upper portion of the casing cut away,-and with the furnace feed pipes broken off near the wheel casing. Fig. 2, illustrates an exterior end view of the wheel casing with a small portion broken away to show a spoke of the pocketed wheel. This view also shows several feed mixture outlets and several air blast inlet pipes broken away. A driving shaft is shown broken off near the wheel casing. Fig. 3, shows a sectional elevation on the line B B of Figs. 1 and 4, with the.

air blast, furnace feed pipes, and part of the fuel hopper, broken away. Fig. 4-, shows a cross sectional end View on the line A A, of Fig. 3 and illustrates the cellular construction of the distributing pocketed wheel, and a centrally disposed inclined partition, which separates the filling side from the blowing side of the wheel. This view also shows the conveyer blades, which take the dust from the screw and force it into the lower grate pockets in the wheel. Fig. 5,

shows a plan of a, detail broken from the.

feed control lever 17, shown in Fig. 3. Fig. 6, shows an outline of the device as applied to a locomotive. This view only shows such parts of the locomotive and tender that are Specification of Letters Patent.

Patented May 25, 11915..

adjacent to the stoker. Fig. 7 shows a plan of a smaller gravity fed pocketed or grated. wheel with part of the case broken away. Fig. 8, is a vertical longitudinal section thereof. Fig. 9, is an end sectional view in part showing a portion of the case and wheel broken away. This wheel is fed from above the wheel by gravity.

In the several drawings, the numeral 1 represents a hopper for storing comminuted fuel, and which may be of any convenient size. .On a locomotive it may store a number of tons and is mounted upon a tender.

2 is a screw conveyer of usual construction, and may extend to the rear of the hop per, which is not shown because it is of usual construction.

3, 3 and 3 are conveying blades, arranged at the delivery end of the screw 2 for the purpose of conveying the fuel, delivered by the screw, to theinterior periphery of the pocketed or grated distributing wheel, 4, rotatively mounted in the casing 55. The distributing wheel, 4, is supported by radial spokes, 6, projecting from a central hub 8 keyed on the hollow shaft, 7. This hub 8 extends through the casing cover 10 and, is rigidly keyed to the worm wheel 11, which is driven by any suitable motor through the worm shaft 12. The hollow shaft, 7, can rotate freely on the clutch shaft, 9, and is rigidly fastened to the

con veyerblades

3, 3 and 3, at its left end as shown in Fig. 4. The

conveyer blades

3, 3, 3 therefore revolve continually with the grated distributing wheel, l, because the hollow shaft, 7, is rigidly keyed to the grate wheel hub as already stated.

@n the right end of the shaft 9, is a lever actuated clutch, 13, that is adapted to engage with a corresponding clutch, 14 formed on the hub of the grate wheel, 4:, as shown. When the clutch is thrown into engagement by means of the lever, 15, the clutch shaft,

9, rotates and thereby actuates the screw 2.

this arrangement a manual, or automatic, manipulation of the lever, 15, will stop, or start, the screw, 2, as desired. It slotted link 16, engages with a pin 16 pro jecting from the upper end of the lever 15. At its opposite end the link is connected with an elbow feed control lever, 17, as shown and in a manner to cause the clutch 13, to engage with 14-, when the feed control blade 17 drops to the dotted position. An excessive accumulation of fuel delivered by the screw 2 will cause the blade 17, to be lifted and thereby stop the feed. Moreover, when there is a want of supply at the blades 3, the control blade 17*, will drop and again start the screw 2.

It will be noted that the periphery of the grated distributing wheel 4, is of cellular construction, having rectangular pockets for lifting and distributing the dust, received from the blades, 3, into the lower wheel pockets, to its upper side when rotating as indicated by the darts. The dust is prevented, from spilling prematurely, by the semi-cylindrical guard 18, until the proper instant, when each pocket comes over the corresponding air blast opening. For example, the pockets I, must come over the blast outlet 19, at the zigzag edge 25, of the guard 18. Likewise the pockets 4", must come directly over the blast outlet 20; the pockets 4 over the blast outlet 21, and the pocket 4; over'the blast pipe 22, which extends from the casing wall 23, Fig. 1, inwardly to the pockets 4. The zigzag edge 25 has downwardly projecting flanges 18 which form wings or partitions between the blast pipes, as shown in Fig. 4:, for the purpose of preventing scattering of the blasts, and to guide the dust and blast mixture to the dust feed pipe outlets, 19, 20, 21 and 22 The excess of dust which is not carrred away toward the furnace by the feed p1pe s, or blast, drops down on the warped partition 26 and glides into the lower pockets of the distributing wheel to be again returned.- Evidently if this surplus fills the pockets, as in case when the blast is shut off, no additional dust can be fed by the

blades

3, 3, 3*, into the pockets after they pass the warped partition 26 toward the left. This would result in an accumulation of dust under the blade 17, and thereby would lift it and stop the screw 2. To prevent the dust from adhering to the pockets, small air jets 27, 27, 27 and 27, are placed over the pockets at the corresponding air blast discharge outlets. These jets may take air from any source, but are each preferably connected to one of the corresponding blast inlets, 19 20 21 and 22 In Fig. 6, is shownthe application of my 1nvent1on to a locomotive, in which the stoker is placed between the locomotive and Its tender, with the furnace feed pipes, 22, leading to the furnace, 22 in the usual manner. In like manner it may be applied to a stationary furnace.

In Figs. 7, -8 and 9, is shown a smaller grate distributing wheel 40, mounted upon a driving shaft, 90, within a case 50. The spokes 60, are integralwith the hub 80, and are bolted to the pocketed wheel rim 40, for convenience when renewing. There are two air blast inlets 51 and 52, which blow directly across the case through the wheel and into two fuel mixture outlets; 53, only I being shown. In this construction the compockets, means secured to said casing to retain the fuel in said pockets until they reach the top portion of their circular path of travel, the fuel then falling out of the same, alined air-inlet 'and air-and-fuel-outlet pipes leading respectively into and from said casing beneath the top part. of said wheel, andmeans to direct any fuel, which is not carried into said outlet pipe by the air blast, back into the pockets, at the bottom of the wheel. I

2. In a stoker for comminuted fuel, the combination of a rotary wheel, internal radial blades thereon forming pockets, means to deliver the fuel into the lower part of said wheel, a guard to retain the fuel in said pockets until they reach the top of the wheel, and alined air-inlet and air-and-fueloutlet pipes, the axis of which is located in a plane beyond. theend of said guard and beneath the top portion of the wheel, whereby the fuel, as it falls out of said pockets, is carried by the air blast into the outlet pipe leading to the furnace, and fuel not so carried drops back into the pockets at the bottom of the wheel, is carried up and again dropped into the path of the air blast.

3. In a stoker for comminuted fuel, the combination of a casing, a pocketed wheel rotatively mounted therein, means to deliver fuel into said pockets before they reach the top of their path of travel, an air-blast inlet pipe leading into said casing, an air-and-fuel-outlet pipe leading out of said casing in alinement with said inlet pipe, and means to retain the fuel in said pockets until they reach an el.evation. such that the fuel will fall by gravity between the adjacent ends of said pipes.

4. In a stoker for comminuted fuel, the combination withv a source of fuel supply, a casing, means for delivering fuel thereto, a plurality of air blast inlet pipes project ing into said casing, air and fuel mixture combination with a source of fuel supply, a casing, means for delivering fuel thereto, comprising a screw conveyer and rotary conveyer blades disposed between said screw and the casing, an air blast inlet pipe projecting into said casing, an air and fuel mixture outlet pipe in alinement with said inlet pipe, a journal bearing, a rotary distributing wheel supported thereby and mounted within said casingfa'nd means to direct back to the wheel the surplus fuel not blown through the outlet pipe.

6. In a stoker for comminuted fuel, the combination with a source of fuel supply, a casing, means for delivering fuel thereto, comprising a screw conveyer, an air blast inlet pipe projecting into said casin an air and fuel mixture outlet pipe in alinement with said inletpipe, journal bearings, a rotary distributing wheel supported thereby within said casing and adapted to spill comminuted fuel into said blast, a clutch cou pling said conveyer with the wheel, and operable-means for disengaging said clutch to permit said conveyer to stop while the wheel continues to rotate.

7. In a stoker for comininuted fuel,.the combination with a source of fuel supply,

a casing, means for delivering fuel thereto,

comprising a screw conveyer, an air blast inlet pipe projecting into said casing, an air and fuel mixture outlet pipe in alinement with said inlet pipe, journal bearings, a rotary distributing wheel supported thereby within said casing and adapted to spill comminuted fuel into said blast, a clutch coupling said conveyer with the wheel, operable means for disengaging said clutch to permit said conveyer to stop while the wheel continues to rotate, and a member coupled to said clutch and adapted to be actuated by the accumulation of fuel at the wheel.

8. In a stoker for comminuted fuel, the combination with a source of fuel supply,

a casing, means for delivering fuel thereto,

comprising a screw conveyer, an air blast inlet plpe pro ecting into said casing, an air and fuel mixture outlet pipe in alinement with said inlet pipe, journal bearings, a rotary distributing wheel supported thereby within said casing and adapted to spill comininuted fuel into said blast, a clutch coupling said conveyer with the wheel, and operable means for disengaging said clutch to permit said conveyer to stop while the wheel continues to rotate, a member coupled to said clutch and adapted to be actuated by the accumulation of fuel at the wheel, and means for disengaging said member from the clutch to permit manual operation thereof,

9. In a stoker for comminuted fuel, the combination with a source of fuel supply, a casing, means for delivering fuel thereto, an air blast inlet pipe projecting into sai casing, a journal bearing, a rotary distributing wheel supported thereby within said casing, and adapted to spill comminuted fuel into said blast, an air and fuel outlet pipe in alinement with said inlet pipe, a hollow shaft rigidly attached to said wheel, a conveyer shaft extending through said hollow shaft and means for coupling it to said wheel.

10, In a stoker for comminuted fuel, the combination with a source of fuel supply, a casing, means for delivering fuel thereto, an air blast inlet pipe projecting into said casing, an air and fuel mixture outlet pipe in alinement with said inlet pipe, a journa bearing, a rotary distributing wheel supported thereby, within said casing, and adapted to spill comminuted fuel into said b ast, and means to direct back to the wheel the surplus fuel not blown through the outlet, said wheel having a rim with pockets formed therein, and a shield member engaged therewith to prevent prematurely spilling fuel from said pockets, while conveying and distributing fuel to the air blasts.

oneness L. nnrstn n.

Witnesses Cnas. L. HEISLER, J12,

S. E. Wnn'rs.