US1681935A - Jordan engine - Google Patents

Description

Aug. 28, 1928.

H. R. HARRIGAN JORDAN ENGIE Filed May ll, 1926 2 Sheets-*Sheet l INVVENTOR BYLJJ ATTORNEY Aug. 28, 1928.

H.l R. HARRIGAN JORDAN ENGINE Filed Mavy ll, 1926 2 Sheets-Sheet 2 lNvNToR BY H l5 ATTORNEYS Patented Aug. 28, 1928.

UNITED Y STATES PATENT OFFICE.

HERMAN R. HARBIGAN, 0F HOLYOKE,'MASSACHUSETTS, ASSIGNOIB. T0 E U. JONES '& SONS G0., OF PITTSFIELD, MASSACHUSETTS, A` CORPORATION 0F MASSACHUSETTS.

. JORDAN ENGINE.

' Application mea nay 11,

This invention relates to certain im rovements in grinding bar arrangements or the shell or stationary element of a refining engine of the Jordan type.

These Jordan refining engines include a stationary shell and a cooperating core or plug which is mounted to rotate in the shell. These Jordan engines are tapered and the stock to be refined is fed in from a suitable hopper through the small end of the shell, being discharged through the large end. The interior surface of the shell is provided with grinding elements in the form of bars which are spaced apart and separated by strips of suitable material, usually wood. The core or plug is also provided with cooperating grindin bars or blades separated by strips of suitab e material, such as wood.

In assembling the shells of these Jordan engines, as ordinarily constructed, the grinding elements are usually arranged in the shell in sectional form, that is, the grinding bars are arranged in three or more sets longitudinally of the shell, the bars of each set being of the same length and the wood or filler strips between the bars are Ythe same length in each section.

In Jordans constructed in this way, at the circular -joint between any two of the sections, there are voids or small spaces where the ends of the bars do not touch or the ends of the wood fillers between the bars do not quite touch. In refining certain stock, particularly long fibre stock, if a fibre catches in one of these voids others adhere to it and finally a mass of fibre, known in the trade as a string, is formed which is liable to pass out of the discharge end of the engine without being refined or torn to pieces. These lumps or strings are very annoying to the paper maker because whenever one goes on the screen of the paper making machine and into the sheet, it produces what is called a lump and when the sheet passes through the calender rolls of the papenmaking machine this is crushed and forms a weak point with the result that this sheet has to be thrown out. Furthermore, dirt is apt to accumulate in these interstices and give trouble.

In the construction of these Jordans, as ordinarily effected, the number of the knives is preferably increased as from the small to shown in Fi 1926. Serial No. 108,437.

the large end of the machine, the small number of knives at the small end being employed so as to provide free entrance and ,circulation of the stock at the beginning of the refining operation. The increased number of these knives longitudinally of the shell causes certain of the knives to lie between others with no other knife ahead of them against which they can a'but. This construction also tends to produce strings, the fibres lodging against the ends of these knives.

It is the chief object of the present invention to produce an arrangement of grinding bars for the shells of refining engines of the Jordan type which will prevent or reduce to a minimum the formation of these strings v or lumps so that the stock will pass through the refining engine in the condition in which the production of imperfect sheets and this string trouble is eliminated.

It isa further object of the invention to produce an improved construction for a filler for shells of this type in which, as the knives wear down, the filler block may be removed so as to present a fresh grinding bar surface.

With these and other objects not specifically referred to in view, the invention consists incertain novel parts, arrangements and combinations which will be described in connection with the accompanying drawings and the novel features pointed out in the claims hereunto annexed.

In these drawings,- Y,

Figure 1 is a more or less diagrammatic, partly sectional, elevation of a Jordan engine embod 'ngthe invention;

Fi re 2 1s a section taken on the line 2-2 of Figure 1, looking in the direction of the arrow, showing one arrangement of bars and plug which may be employed; x

Figure 3 is a partially broken away end view of one form of the improved shell;

Figure 4 is a gian view of the bar arrangement shown in igure 3;

Figure 5 is a sie view of the arrangement Figure 6 1s a plan view of a modified arrangement of the bars which may be adopted Figure 7 is a detail showing one grouping of the bars which may be used; X

Figure 8 is a detail showing a different grouping or arrangement of the bars;

Figure 9 is a detail end View of an improved filler which may be employed between the grinding bars;

Figure 10 is a side view of the construction shown in Figure 9;

Figure 11 is an end view of a modified form of filler-block; and

. Figure 12 is a side view of a Construction showing the. filler block overlapping the end of a'bar.

Referring now to these drawings, the invention has been illustrated as employed in a refining engine of the Jordan type which has been conventionally illustrated. yArs shown, this engine includes a stationary outer .shell 1 suitably supported on standards 2 rising from the floor or any other suitable base 3. This shell, as. shown, is tapered and at its small end opens into a feed chamber 4 to which the stock to be refined is fed from a hopper 5. The stock is delivered through an exit port 6 formed in a head 7 secured to the large end of the shell. Cooperating wlth this shell is a core or plug 8, this core or plug being supportedon a shaft 9 driven from any suitable source of power, indicated as a pulley 10. The shaft has its bearings at l1, 12 in frames 11A, 12A, supported ,on standards 13,

' 14. The shell is provided with grinding ele- 3oy .the core or plug is provided with cooperating ments inthe form of bars or blades l5 and grinding elements shown as bars or blades 16, these bars or blades cooperating with the bars 15 to refine the stock as it passes through the engine from the small to the large end. These bars' wear down after the machine has been used and in the best constructions means are provided by which the plug may be shifted endwise in the shell so as to always have the bars in correct grinding engagement, this being accomplished in the usual manner by means-of a hand wheel 17 and screw and nut construction 18.

Iif accordance with, the invention, .an improved arrangement and form of grinding ars is provided for the shell 1, these bars being arranged sofas to prevent or reduce to a minimum the formation of strings or lumps in the stock, or the collection of dirt. While the invention may take various concrete embodiments, the construction selected to illustrate the invention has been found to have good resultsin practice land will be described as illustrative of a preferred means for carrying the invention into effect.

In carrying out the invention, the bars are so arranged'that certain of the bars run the lfulllength ofthe shell and others of the bars areof a length less than the' full length of the shell. With this arrangement, there isa shorter ,bar with a longer bar on each side thereof, the shorter bars being arranged toward the large end of the shell. Referring first to the construction shown in Figures 3 to 5, there is provided an arrangement of long bars 19 which extend the full length of the plug, these bars being bent at points indicated at 20 to give them the desired con-- The. bars 2l in this figure are half the length of the shell. It will be observed that there are channels 23 formed between the long bars and that these channels are divided by the short bars int-o narrower channels 24, so that a good circulation of the stock through the machine to its discharge is effected. To prevent the fibres of the stock from catching on the ends of the short bars, these ends are bevelled, as indicated at 25 in Figure 5, and preferably the ends of the long bars are also bevelled, as indicated at 26. This beveling, it willbe observed, slopes from the intake or small end of th-e shell toward the large end of the shell. The bars are bevelled to a plane level with or slightly below the working surface of the iiller strips, indicated at 27, which are interposed between the bars and which space them apart. In this construction, the pulp or stock has a smooth incline to ride over and there are no points longitudinally of the shell at which the stock can gather or collect.

In the best constructions, certain bars, known as guide or rail bars, are provided which extend the length of the shell, one of these bars, marked 50, being shown in Figure 3. Where these rail bars are employed, a grinding bar, as 19, extending the full length of the shell, will be positioned on each side of these bars.

Referring to Figure 6, a somewhat different arrangement of the grinding bars is illustrated. In this arrangement, there areV provided three sets of bars longitudinally of the shell. As in the construction shown in Figure 4, there is provided a series of long bars 28 which extend the length of the shell, a series of intermediate bars 29 which eX- tend two-thirds the length of the shell, and a series of short bars 30 which extend approximately one-third the length of the shell. The bars 29 are, as in the construction shown in Figure 4, spaced from the bars 28, the shorter bars 29 and 30.both being spaced Ifrom the bars 28. The bars in this arrangement are, as shown, bent Aat suitable points, indicated at 31, and these bends in the bar are preferably opposite each other, as shown. The bars can be arranged in the shell in various ways, either with a filler 27 between each bar, as in Figures 4 and 6, or the bars may be arranged in various groups or clusters, and two such groupings are illustrated in Figures 7 and 8. Referring to these figures, and first to CIV ifillers 37.

Figure 7, it will be seenjzhat, considering the arrangement as around. the shell, the bars are arranged in clusters of two and these clusters of two canl be arranged in groups. As shown, there isprovided a plain bar 32 and a bar 33 having a shoulderfindicated at 34, sor as to leave a space 35 between the bars. These clusters are separated by spacers or fillers, shown as of wood, 36 and the bars may be divided into 'groups by wide spacers or Of' course, the cluster could be made up of twol plain bars with a narrow filler strip or in any desired way. A

Referring to the construction shown in Figure 8, there is shown a group of bars oo mprising clusters of two bars, indicated by the numeral 38, a group of -bars including a cluster of three bars, indicated by the numeral 39, and a groupof bars including clusters of three, four. and five bars, indicated by the' numeral 40. It will be understood, of course, that this grouping and arrangement of bars is merely illustrative Aand the invention in its broad aspects is not conned to any articular grouping or arrangement` of t'he ars.

As the engine is used, these grinding bars wear down and, to present a sufficient height of `bar for proper rening action, the wooden spacers or llers' have to be lowered. A spacer or filler is preferably provided by which this can be done very quickly, the spacers being formed with portions which may be removed with' a suitable tool while the spacers are in position. While this may be elfected in various ways, two such ways are shown in thedrawings. Referring first to Figures 9 and 10, the spacer is shown as having. a built-up portion formed of layers which can be removed. As illustrated, the spacer 41 spacing two bars 42, 43, has three removableflayers 44 which are glued or otherwise removably secured together. When it lis desired to reduce the thickness of the spacer, it is simply. necessary to insert the tool and pry off one of these layers 44.

Referring to Figure 11, a' spacer 45 is shown` the top portion of which is grooved, as indicated at 46. When it is desired to reduce the thickness of this spacer, it is simply necessary to chip olf one of the layers 47 by means of a suitable tool.

As before stated, the bars are preferably bevelled down to or slightly below the point where the shell filling is practically worn out. The wood spacers are therefore formed, as indicatd at 48 in Figure 12, so that they will overlap on the ends of the bar. Thus no pockets or voids are formed which will catch the fibres of the stock and form strings, or allow the'acc-umulation of dirt.

The filler or spacer bars may be the length of the shell. In the simplest construction,

however, they preferably are sectional, as' inv dicated in Figure 6, that is, the ends of these spacers can be made so as to closely abut and prevent the formation ofvoids or tween the ends thereof. Y

While the invention has been shown and described in its preferred forms, it will be pockets be- 'understood that various changes and arthe shell and extending toone end thereofl and located between the longer bars, filler blocks separating certain of the bars,the ends of the shorter bars being acutely bevelled in the direction of the passageof stock through' the shell, a core or plug cooperating with the shell, and means for effecting a relative adjustment of the core and shell.

2. In a refining engine, a shell provided with grinding bars extending the length of the shell, other grinding bars shorter than the length of the shell extending to one end thereof and located between the longer bars, other grinding bars shorter than the second bars located between the second bars and extending to one end of the shell, filler blocks separating certain of the bars, the ends of the bars shorter than the length of the shell being acutely bevelled in the direction of the passage of stock through the shell, a core or plug cooperating with the shell, and means for effecting a relative adjustment of the corethe shell, other grinding bars shorter than' the shell and extending to one end thereof and located between the longer bars, filler blocks separating certain of the bars, the ends of the shorter bars being acutely bevelled in the direction of the passage of stock through the shell and to a point level with or slightly below the working surface of the blocks, a core or plug cooperatinnr with the shell, and means for effecting a ielative adjustment of the core and shell.

4. In a refining engine, a shell provided with grinding bars extending Vthe length of the shell, other grinding bars shorter than the shell and extending to one end thereof and located between the longer bars, other grinding bars shorter than the second bars located between the second bars and extending to one end of the shell, vfiller blocks separating certain of the bars, the ends of the shorter bars being acutely bevelled in the direction of the passage of stock through the shell and to a point level with or slightlybelowr the Working surface of the blocks, a core or plug cooperating with the shell, and means for effecting a relative adjustment of the core and shell.

5. In a rening engine, a shell provided with grinding bars extending the length of the shell', other grinding bars shorter than the shell arranged between the long bars and extending to one end of thevshell, said bars being formed with bent portions which coincide, the. ends of the shorter bars being acutely bevelled in the direction of the passage of stock through the shell, filler blocks yseparating certain of the bars, arcore or plug cooperating .with the shell, and means for effecting a relative adjustment of the core and shell.

6. In a refining engine, a shell provided with grinding bars'extending the length of c.

the shell, other grinding bars shorter than the shell arranged between the'long bars and extending to one end thereof, other bars shofrter than the second bars arranged between the second bars and extending to the end of the shell, the ends of the shorter bars being bevelled in the direction ofthe passage of stock through the shell, the bars being formed-with :bent portions which coincide, filler blocks separating certain of the bars, a core or' plug cooperating with the sliellrand means-for effect-ing a relative adjustment of the core and'shell.

7. In a refining engine, a shell provided V with grinding bars extending the length of the shell, other grinding bars shorter than the shell and extending to one end thereofl and located between the longer bars, and filler blocks separating certain of the bars and having removable layers lapping the ends of theshorter bars..-

8. A grinding shell for refining engines comprising grinding bars ofilifferent lengths,

the groups of bars, the ends of the shorter bars being bevelled inthe direction of the passage of stock through the shell, a core or plugcooperating with the shell, and means for effecting a relative adjustment of the core and shell.

1'0. In a refining engine, a shell provided with grinding bars extending the length of the shell, `other grinding bars shorter than the shell and extending to one end thereof and located between the longer bars, other grinding bars shorter than the 'second bars `located betweenthe-s'econd bars and extending to the same end of the shelltsaid bars being arranged in groups or sets circumferentally of the shell, filler blocks separating the groups of bars, the ends of the shorter bars being bevelled in the direction of the passage of stock through the shell, a core or plug cooperating with the shell, and means for effecting a relative?J adjlistment of the core and shell.

In testimony whereof, I have hereunto set my hand. Y

HERMAN R. HARRIGAN.

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