US1134091A - Metallic packing for piston-rods. - Google Patents

Description

J. BADEKER.

METALLIC PACKING FOR PISTON RODS. APPLICATION FILED MAR. 12, 1913.

Patented Apr 6, 1915.

ATTORNEYS more parts,

useful Improvements in nmran STATEs 301m BADEKER, or 01mins, nnniusxn, nssrenonor oitn-nunnnnnrns r0 v HENRY W.

HABSCH, or mane, nnnnasm mn'rnmsrc rncxme m'mromnons Toall whom/it m ay concern:

Be it known that I, J OHN. Bananas, a citizen of the United States, and a resident of Omaha, in the county of Douglas and State of Nebraska, have made certain new and Metallic Packing for-Piston-Rods, ofiw'hichthe following is at specification.

My invention relates to improvements in metallic packing forpiston rods and it con sists in the. combinations, constructions and arrangements herein described and claimed.

An object of my invention is to provide a packing ofthe type described which Will not require the numerousfrepairs that are necessary invth'e ordinary packing of this type, but which will continue to work efficiently without the necessity of repair until such time as is necessary for replacing all the packing itself. Y

. A further object of my invention is to provide a packing the parts of which will accommodate themselves to any movement of the plston rod which is in a direction at right angles to its length. This I accomplish by means of sprlngssof a partlcuiar type which insure a close fit ofthe packing on the piston rod without unduefriction.

A further object of my invention is to provide a metallic packing comprising a follower which will take up the Wear on the packing, thus doing away with thenecessity of adjusting the same as the packing is worn.

A further object of my invention-is to provide. a novel form of metallic packing in which the packing is divided into two or .these parts being held 1 closely I to the piston'rod by means of springs and by the pressure of the steam. when the engine is under steam pressure, but which will re-- tract from the rod slightly when the steam pressure is removed, thereby preventing the undue wear of the parts and also tending to decrease the friction on the rod.

-Other objects andadvantages will appear in the following specification and the novel features of the device will be vparticularly pointed out in theappendedflclaims,

I Fig. 2 is a face My invention is illustrated in the panying. drawings forming part of this application in which- Figure l is a section through the packing,

view of the casing and. fol- I Specification of Letters Patent.

lewer, Fig. 3-is a side view of the casing i PatentedA r. 6,1915;

Applicationflled nun 1a, 1913.. Serial in 783,746.

packing, Fig. 5 is aside view of one of-the parts-shown in ,Fig. 4. ,,Fig. Gis a face view of the body portion'of the packing, the mov able blocks carried thereby, and the casing,

' Fig. 7 is a perspective 'VIBW- of one of the blocks,.and Fig. 8 is a view of armodified form of the apparatus shownin- Fig. 6.

This. invent on. isan improvement on that, formshown 121 my v ripr Patent #975,313"

of November 8, .1910. v 7

Referring now particularly to Fig- 1 1 have shown therein aportion of the cylinder head 1- with the piston rod 2- extending.

through an opening 3 in the head.

The is secured to the. head vby means of bolts 5 or in any suitable manner. The gland is provided with a recessed portion 4 for the accommodation of the fol-lower and casing. The follower consists preferably of a ring 6 (see Fig.- 2) which isprovided with-a laterally extending flange 6 onits periphery. This flange has. cut away portions 6 whose purpose -w1ll be explained later. Between the cut-awayv portions 6 are inwardly extending. lugs .7 which areiintegral with the flange 6 The packing 'is-rmade of suitable material such as Babbltt metal and consists preferably of a body portion arranged 'in two. parts. Thus in Fig.4 1. have shown'these- 8. The lugs .8 on oneof the body portions are arranged to contact with the lugs 8 on the other body portion.

In Fig. 7 I have. shown one of .theblocks 9 which are designed; to enter-the recess 8 in the body portion proper of the packing. The block 9 is made ofjsoft metal but it is somewhat harder than the metal of the body accom- 0rtions 8 and 8". I'have found that wiiere these parts'are of the same hardness there is a greater tendency-to adhesion thus ingland iywhich contains the packing creasing the probabilities of wear and abra sion. It will be understood. however, that both of these parts, a, the block 9 and the springs 10 arenormally straight pieces of metal. Theyare bent so as to enter between the interior portions of the flanges 6 and the exterior portions of the members 8 and 8 The tendency of these springs therefore is to force the packing members 8 and 8 toward the piston rod 2.

From the foregoing description of the various parts of the device the operation thereof may be readily understood. v

A stout spiral spring 11 is placed in the I recess '12 in the cylinder head 1. The foltain the blocks 9 If the lugs 7 were not used i put over the piston rod and a sprin wirev lower and casing is slipped over the enlarged part 2 of the piston rod, the central opening-6 of the follower being sufiicient to permit it to pass the part2 readily. The blocks 9 are placed in position in the recesses .8 of' the body portions 8 and 8 and the semicircular parts are brought overthe piston rod 2 and slipped into the casing formed by the follower 6 and the flange 6. It will be noted that the lugs 7 engage the ends of the packing so as to provide spaces between the packing and the flanges 6*? for the springs 10. Furthermore these lugs temporarily rebefore the springs 10 are put in place. These are inserted in the position shown in Fig. 6. The gland 4: is then passed over the'portion 2 and secured by means of the bolts 5 to the cylinder head. the first spring 10 to be placed in positionwould crowd the packing and the flange apart at that side 'so that a; spring could not be easilyinserted on packing. The lugs 7- the other side of the prevent this and make it easy to assemble the packing inside of the follower, while the cut-away portions of the flange make the springs accessible for the removal of the packing from the follower. When the packing is to be replaced, the gland is removed and the follower. is brought forwz rd until a tool can be inserted in the cut-away portions 6 behind the springs to force them out. New packing parts are then assembled and if the piston rod is hot the two halves are or split ring 8 is sprung over the two alves, a groove 8 being provided for that purpose (see Fig. 5).

The action of the device is as follows 1'. VVhenthe packing is first put in use the movable members 8 and 8 are fitted against the rod 2 so as to engage the same uniformly in the bore of the packing ring.. At'this time there is very little if any pressure on the lugs 8 and 8. After the packing has been in use for some time the' surfaces engaged by the rod are worn away and when so worn the pressure that was at first carried by said surfaces is thrown entirely on to the lugs. Now the area of the lugs is so small that when the pressure is received thereon they are upset and mushroom out until the inside surface or bore of the ring is again in contact with the rod, so as to again receive the pressure on these large surfaces and relieve the pressure upon the lugs. This acti'on takes place at such minute intervals that it is practically continuous instead of intermittent.

It will be observed that the springs 10 together with the steam which enters the opening 3 and surrounds the casing both tend to force-the movable members 8 and 8 toward I the piston rod. The lugs 8 hold the movable members 8 and 8 in place. As the interior portions of the members 8, 8 and 9 wear the pressure ofthe steam which isaugmented by the spring 10 causes the lugs 8 and 8 to upset or mushroom, thereby permitting a movement of the packing portions toward the piston rod and thus preventing the escape of the steam. This action will occur until the ends of the semicircular packing members 8 and 8 have virtually come into contact. The upsetting of the lugs 8 causes them to spread into' the grooves 8. while the upsetting of the lugs 8 is permitted by the space on either side. Now when the steam pressure is removed, as for instance when the-engine or locomotive is running down hill, the packing tends to retract slightly from the piston rod, due to the removal of the steam pressure, the springs 10 not being of sufiicient strength to hold the packing members closely to the rod. This tends to greatly prolong the life of the packing. Y I

The ugs 7 on the interior of the flanges 6 not only space the packing members from the flanges, but they also tend to keep the springs 10 in place so that these springs cannot by any possibility overlap, as might be the case if these lugs were not provided.

Any movement of the piston rod at right angles to its length will cause :1 corresponding movement ofthe packing and the casing or follower. I have found that where springs such as those shown at 10 are provided they keep the packing normally around the rod. Incertain forms of packings of this type, springs are placed on the outside of the packing members, but these springs tendv to break. 'Moreover if spiral springs are used theyhave not sufficient tension to 'move the lower part of the packing members to follow the movement of the piston rod at right angles toits length. There is there fore a tendency for the steam to escape, but in my device no such escape of steam is possible, since the packing parts move uniformly with the piston rod.

It will be seen from Fig. 1 that as the surface of the packing members next to the gland are worn the spring 11 will press uponthe follower and move the device so as to compensate for any such wearing. Itv will also be observed that there is a space normally between the follower and the cylin' der head so as to provide plenty of room for the packing. The provision of. the spring 11 therefore automatically compensates for the wear of the packing and thus reduces the necessity of any adjustment of the packing due to wear until the packing has finally worn out and has to be replaced.

In Fig. 8 I have shown a modified form of the device in which there are three body portions 8", 8 and 8 of the packing instead of two. The blocks 8 are carried in the same manner as shown in Fig. 4. It will be observed that the springs 10 in both Figs. 6 and 8 exert pressure near the ends of the packing members 8*, 8 and 8, 8 8. This is precisely the point where the pressure should come to effect proper movement of the packing members due to the wear.

I claim 1. A metallic packing for piston rods, comprising a casing having an opening to receive the piston rod, a body portion arranged to enter said casing, said body portion being divided into a plurality of parts, each part being provided with a recess, a block arranged to enter each of said recesses and constituting part of the packing material, means disposed between the walls of the casing and the packing material for pressing the latter toward the piston rod, said last named means comprising a plurality of leaf springs disposed betweenthe wall of the casing and the exterior portions of the packing, and means for preventing the overlapping of adjacent springs and for centering the packing within the casing.

2. A metallic packing for piston rods, comprising a casing having an opening to receive the piston rod, a body portion arranged to enter said casing, said body portion being divided into a plurality of parts, each part being provided with a recess, a blpck arranged to enter each of said recesses and constituting part of the packing material, means disposed between the walls of the casing and the packing materialfor pressing the latter toward the piston rod, said last-named means comprising a plurality of leaf springs'disposed between the wall of the casing and the exterior portions of the packing, and inwardly projecting lugs carried by the-casing and disposed between the ends of venting the overlapping lugs also serving to space the Walls of the casing.

3. In a metallic packing for piston rods, a follower having a central opening arranged to receive the piston rod, said follower being provided with a laterally extending flange having a plurality of cut away portions, inwardly extending lugs carried by said flanges, said lugs being disposed between said cut away portions, a plurality ofmetallic packing sections carried by said follower, and a leaf spring disposed bethe adjacent springs for preof the latter, said the packing from tween each of said sections and the adjacent flanges for pressing the sections toward the piston rod, a portion of each of said springs being in alinement with a cut away portion in said flange- 4. In a metallic packing for piston rods, a follower having a central opening arranged to receive the piston rod, said follower being provided with a laterally extending flange having a plurality of cut away portions, inwardly extending lugs carried by said flanges, said lugs being disposed between said cut away portions, a plurality of metallic packing sections carried by said follower, and a leaf spring disposed between each of said sections and adjacent flanges for pressing the sections toward the piston rod, a portion of each of said springs being in alinement with a cut away portion in said flange, a gland or casing having a wall arranged to be engaged by the metallic packing, and means for securing said gland to the cylinder head. a

5. In a metallic packing for piston rods, a follower having a central opening arranged to receive the piston rod, said follower being provided with a'laterally extending flange having a plurality of cut away portions, inwardly extending lugs carried by said flanges, said lugs being disposed between said cut away portions, a plurality of metallic packing sections carried by said follower, a leaf spring disposed between each of said sections and the adj acent flanges for pressing the sections toward the piston rod, a portion of each of said springs being in alinement with a cut away portion in said flange,-a gland or casing having a wall arranged to be engaged the metallic packing, means for securing said gland to the cylinder head, and a spring disposed between aportion of said cylinder head and said follower for holding the packing against the wall of the gland.

6. In a metallic rod packing, a packing ring comprising a plurality of segments disposed around the rod, a follower engaging one side of the packing ring and having flanges extending over the peripheral portion of the ring, and flat springs having byv ': their. endseiitendin g betweenthe flanges and packing ring and their intermediate portions extending across between the adjacent peripheral ends of the flanges so as'to be accessible from the outside.

7. In. a metallic rod packing, a packing ring comprising a plurality of segmentsdis.

' posed around" the rod, flat retaining springs I .having their central portions engagin the.

segments, a followerengagin one si e of the packing ring, peripheral an es on the follower extending over the en portions only of'the'retaining springs, and, lugs on the inner sides of saldlfianges to positively.

limit outward movement of. the ,segments relatively to the follower.

8. In a'metallic .rod packingfa' plurality. v of main segments fitting upon the rod and having. their'adjacent at portions extending approximately radial to the rod, c0ntacting malleable ,abutments on said adj acent ends. of the segments to hold themnor mally in spaced relation, there being recesses in thesegments at one side andadjoining,

the ends thereoflpsecondary segmentsv dis-,

posed in-said recesses so as to lapthe ad'- oining ends of'the main segments and engage therod, said secondary segments fitting against all but one edge of eachof the recesses, and malleable abutments for holding said segments normally-in spaced relation to the other-edges of the recesses. r 1 1 A JOHN BADEKER. Witnesses:

, 'L. A. STANLEY; Pm: B. TUBPIN.

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