US1886764A - Stoker conveyer - Google Patents

Description

1932- E. A. TURNER 1,886,764

STOKER CONVEYER Filed March 5. 1930 INVENTOR Patented Nov. 8, 1932 UNETED STATES PATENT oFsIcs-"f EDWIN ARCHER TURNER, OF NEW YORK, N. Y., ASSIGNOR. TO THE STANDLAR'D STOKER COMPANY, INCORPORATED, A CORPORATION OF DELAWARE STOKER CONVEYER' Application filed March 5, 1930. Serial No. 432,486.

This invention relates to stokers in which.

fuel is reduced to a suitable and desired size by the action of the conveyor screw and a crushing jaw, and more particularly to an adjustable crushing jaw.

In order to use ordinary run of mine coal which along with pulverized parts usually contains lumps of considerable size, it is necessary particularly in a locomotive stoker that means be provided as a part of the stoking mechanism which will break the coal into lumps under a predetermined size. It is further desirable to regulate the size of the coal delivered to the firebox as nearly as possible.

To this end the present invention has for an object the provision of a novel and practical means for adjusting the crusher to regulate the maximum size of the fuel delivered to the firebox as desired.

Another object of the invention is the provision of crushing means that can be simply and easily adjusted without disarranging or disturbing any part of the stoking mechanism.

Other objects of my invention will appear from the following description taken in connection with accompanying drawing, wherem,

Fig. 1 is a fragmentary longitudinal section of the locomotive tender showing a portion of the conveying mechanism and the preferred form of my improved crushing mechanism;

Fig. 2 is a top plan view of the fuel crushing and feeding device on the line 22 of Fig. t;

Fig. 3 is a section View on the line of Fig. 2; and

Fig. 4 is a section view on the line 44 of Fig. 1.

For the purpose of best illustrating one use of the invention it is shown and will be described as it is embodied in a stoker adapted p for use with a locomotive and tender.

The'frame of the locomotive tender is represented at 10 and the floor of the tender at 11.

The floor is provided with a longitudinal opening 12 adapted for the discharge of fuel municates at its forward end with the tender bowl 14 which in turn is flexibly connected with a conveyer casing 15.. Disposed within the trough13'and casing 15 are fuel forwarding means, preferably in the form of screws 16 and 17, flexibly connected as by a universal joint 18. j

Removable cover sections 19 may he slid forward to permit the entry of fuel into the trough 13 as the supply becomes depleted.

The forward end of the trough 13 is formed by a plate 20 having an opening 21 therethrough, which forms a restricted passageway with the rearward portion of the tender bowl 14 through which coal is moved by the conveyer screw. Fuel is discharged from the trough 13 through the opening 21 into the tender bowl 14. Extending forwardly from the upper part of the plate 20 is a flange 22.

The plate 20 is provided with guides 23 for receiving the slidable' crusher plate 24. The main part of the crusher is disposed in the upper forward section of the trough adjacent the plate 20. This portion of the crusher plate is formed with a lower recess or curvilinear opening 25 which embraces the upper portion of the conveyer screw, and is provided on its rearward face with the rearwardly extending spurs or projections 26.

The other part of the crusher plate is in the form of a heavy metal band or strap '27 and extends forwardly from the lower portion of the main part of the crusher plate into the tender bowl 14. The band or strap portion of the crusher plate arches over the screw 16, its inner face being preferablyapproximately parallel with the axis thereof.

' A vertical threaded bolt 28 extends through an opening in the flange 22 and an opening in the tender bowl top wall and is rigidly secured to the band or strap'portion of the crusher plate. The crusher plate is held in position by means of the lock nuts 29 and 30 and is supported from the flange 22. The crusher plate may be raised or lowered to provide the desired opening between the screw 16 and its crushing members, without disturbing any part of the stoking mechanism since the adjustments are made from without the stoker by means of the lock nuts 29 and 30.

The lower wall portion 31 of the restricted passage in the tender bowl 14 has a radius. of curvature slightly greater than the screw 16 and is concentric therewith. The upper wall portion 32 of the restricted passage in the tender bowl 14.- has a greater radius of curvature than the screw 16 and provides the space 33 between the periphery of the screw and the wall portion 32.

Goal of maximum size is delivered when the space 33 is at a maximum and this is determined when the strap or band portion 27 of the crusher plate is raised so that it fits 'fflush againstthe wall portion 32 as shown in Fig.3. Goal of minimum size is delivered whenthe band portion 27 is lowered so that its lower edges rest 'on the shelf portions 34,

decreasing the space-33 to a minimum.

'The importance and desirability of having an easily adjustable crusher opening is appa're'n't when-one considers the widely divergent circumstances to which the stoclzer and itsre lated parts must'be adaptable. Stoker-s, "especially those' in locomotive service are used with combustion chambers of different sizes provided with grates differing greatly in size, design and form. Some combustion chambe rs are provided with grates having small air openings adapted to burn small lump or commi'nute'd fuel and carry a thin firebed, while'others' are :provided with comparatively large air openings adapted to burn lump fuel :of :a sizeor sizesdependent upon the area of the gratejopenings and whereon a comparaitivel-y thick firebed may be maintained. Handfired locomotives, which are generally provided with grates of the latter type, are gradually being equipped with stokers, and with the use of an adjustable crusher, stokiers may-be installed necessitating no changes in the firebox or grate construction.

l heuse of an'adjustable crusheropening to :vary and control the size of the lump fuel fed to :the combustion chamber permits the use ofa more or-less standard "form'of stolrer :equipment-adapted-to meet the widely diversified forms of firebox and grate construction now prevalent.

. I claim:

'1. In a stoking device the combination of a trough communicating with a restricted 2. :Ina stoking device't-he combination of a fuel trough communicating at its forward end with a restricted passageway, a screw conveyer for advancing fuel therethrough having a floating forward end, a crushing device in said trough having its lower portion extending forwardly into said restricted passageway arching over the floating forward end of said screw conveyer, means for mounting said crushing device from the forward wall of said fuel trough and manually operated means for adjusting said crushing device vertically to and from said fuel advancing means.

3. In a stoking device the combination of a fuel trough, a plate forming the forward end of said trough, an opening in said plate communicating with a passageway, a crushing device in said trough adjacent said plate and having its lower portion extending forwardly into said passageway, sa1d forwardly extending portion having a threaded stem extending upwardly through the top of said passageway, a flange extending forwardly from said plate having an opening adapted to receive said threaded stem, and manually adjustable means comprising lock nuts for securing the crusher in a predetermined poally operated means for adjustably securing the crusher in a predetermined position.

5. In a stoking device, the combination-of .a fuel trough communicating with a restrict- .ed passageway, a screw conveyer disposed therein having a floating forward end, a

plate forming the forward end of said trough, an opening in said plate communieating with said passageway, grooves disposed in the rearward face of said plate adjacent the sides of said opening, a crusher member lIl SiLld trough adapted to sllde in said grooves and having its lower portion extending forwardly into said passageway, said forwardly extending portion having a threaded stem extending upwardly through the top of said passageway,

,a flange extending forwardly from said plate having an opening adapted to receive said threaded stem, and ad ustable means comprising lock nuts securing the crusher in a predetermined position.

In testimony whereof I affix my signature.

EDWIN ARCHER TURNER.

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