US1216503A - Metallic packing. - Google Patents

Description

H. H. ROYER.

METALLIC PACKING. APPLICATION FILED JAN-8| 1916.

1 1 6,503. Patented Feb. 20, 1917.

[raven in r Him 7,

Witnesses Ail/ orn HENRY I-I. ROYER, OF ROANOKE, VIRGINIA, ASSIGNOR OF ONE-HALF T0 RICHARD P.

ROYER, OF ROANOKE, VIRGINIA.

METALLIC PACKING.

Specification of Letters Patent,

Patented Feb. 20, 1917.

To all whom it may concern:

Be it known that I, HENRY H. RoYnR, a citizen of the United States, residing at Roanoke, in the county of Roanoke and State of Virginia, have invented certain new and useful Improvements in Metallic Packing, of which the following is a specification.

This invention relates to steam packing for piston rods, valve rods or other reciproeating or rotating rods or shafts where it is desired to prevent the escape of steam or other fluids from a pressure chamber. The particular object of the same is to provide a simple form of metallic packing for such purposes and to provide improvements genorally in this art. With these objects in view, the invention consists in the combina tion, formation and arrangement of the various parts as herein described and as particularly claimed.

The accompanying drawings show a preferred embodiment of my invention and in these drawings, Figure 1 is a side elevational view, partly in section, showing the application of my packing to the piston rod of an ordinary steam engine. Fig. 2 is an end elevational view of the same, the piston rod being shown in section. Fig. 3 is an end elevational view of the metallic packing, looking from the exterior toward the interior of the steam cylinder. Fig. 4 is a similar view of this packing, seen in the opposite direction. Fig. 5 is a transverse section of this metallic packing taken on the line A B, Fig. 4. Fig. 6 is a broken sectional view through the packing gland, taken on the line C D, Fig. 2.

Referring now to these drawings wherein like parts are similarly designated, 1 represents the piston rod of an ordinary steam engine and 2 a portion of the cylinder head.

Secured to the cylinder head 2 by means of the stud bolts 4 and the nuts 5 is a gland 3, the same being drawn firmly against the outer face of the cylinder head by means of the aforesaid bolts and nuts, the copper ring 18 forming a steam-tight joint between these parts.

The cylinder head 2 is pierced at 6 to accommodate the piston rod 1 in its reciprocations. At 7 this cylinder head 2 is counterbored concentric with the piston rod 1 and the opening 6 so as to form a cavity for the coil spring 16, the bottom of the counterbore providing a shoulder or abutment 22 against which this coil reacts.

The gland 3 is similarly pierced at 8 to accommodate the piston rod 1, both of the holes 6 and 8 being of suflicient size to allow the pasage of the customary collar 17 on the exterior gland 3 is likewise counterbored from its inner toward its outer end so as to form the cavity 9, the same being concentric with the piston rod 1 and the hole 8, and of larger diameter than the cavity 7. The bottom of the counterbore in the glandforms a shoulder or abutment 10 for cooperation with the parts ofthe piston packing.

The packing proper is formed of a composite ring of Babbitt or similar metal which will become slightly plastic under the influence of steam, this ring being made up of 3 or more segments. I have found that if this ring is made up of 2 sections there will be bending of the sections when compressed against the piston rod and consequently more frequent leakage of steam. By making this packing ring of 3 segments or more it will be seen that the radial force of the steam pressure will force these sections against the rod without such bending. This packing ring I make of a composite cross section consisting of a segmentally cut ring 11 of square cross section with a similarly cut L-section ring 12. The square section ring 11 snugly encircles the piston rod 1. the L-section ring being arranged so that the narrow edge of one of the legs snugly encircles the piston rod, the internal angle of the l. accommodating the square section of the ring 11. Thus the two portions lland 12 complement each other to form a complete square or rectangular section.

The various segmental sections of this composite ring are assembled around the piston rod and a band spring 13 is then applied externally of this complete ring in order to prevent the disarrangement of the various parts after assembly.

This composite ring is positioned longitudinally of the piston rod between a vibrating ring 24 and a follower 25 which are made of harder metal. The vibrating ring and follower are duplicates of each other and like the packing are made up of complementary sections, the portion 14 of each being of L-shape in cross section with a substantially square section ring 15 fitting into the angle of the L and completing a composite square or rectangular section for these parts; In

portion of the piston rod. The

leg ofjtlie L is 'turned'toward the ro'dso-as 1 Feachfinstance,the;

I fie,

, -17; This continuous ring ;15,1when applied over the halves'of the L-shapedportion 1 1,

V V holds the partsof the composite ring'intlieir Q1 V v V H square;orrectangular section.

correct vrelz'rtionship, f' and completes the vThese eomposite Nib'ratmg ingring and presenting a largerface against 7 flthe same-ltlian were the rings M and turnedthe opposite ways. In case'they were 7 turned-this latter way there would bea possibility'fof the rings 15 moving outward everthe{packing;ring after the latter has Lworn down and thus allowthe partingof the halves of the L rings 14. In my arrangement rs'uchgai possibility is avoided; The other flat Yto present a continuous face for wear'a-nd also'allow 'for the larger internal'd'iameter of c v jthe'complete r1ngj15 necessary to pass over the ollar117; i

It will be seen romFig. l thal, the outer face of the vibrating ring 24 abuts the shoulif 'der"10; of the gland 8 Theinner follower 25f is slightly removed longitudinally of' the rod fromthevibrating ring, and the metallic V packing proper 'isins'erted between the two;

The coil: spring l6 then extends direct from r {the shoulder 22 of the piston headto the" r .7 inneriface of the follower and forces this ing-the metallic packing proper between:the

follower outwardly atall timesg icompre'ss- [follower and the vibrating r1ng;:

The depthofthe 'counterbore the gland 3, or thedistance from the fshoule' der 10 'tothei inner .end {of thegland 3, is. such that the combined 7 lengths, j longitudi-,

nallyof the piston rod 1, of the vibrating fring thefollower and the metallic packing, V y *when assembled, will be'less'than the depth of'the cavity 9, thus providinga steam pas 1 sageway 23 fromthe cavity 7itofthe cavity 9.

7' {nether-words, theicavity 7 and the cavity-9 f ll. together form a two-part connected pressure i "j compartment in' open' communication with 3 7 '16 Q the' -steamvessel oi; cylinder, the outer 1 part accommodating the packing; etc, and the ar Ipartftheispring; Andthe follower 25" Fafdj acentitoqb'ut does; not extend ito the i nner or, spring Tpcortion' of this pressurecom 3 partment morder the pressure fiuidgmay t ;s ectit n l 14, whieh .encir- V ;,elesftlie piston rod with some' slighticlear ance, isfmadein halves, the cut being'shown at f19',-in' order -that-the same may-V be "positione'd' around the "piston rod without the necessity. of excessive clearance; being" pro v'ided lso as to pass over the collar 17. The V square-section portion 1 5,of the vibratingj jring and of the "follower'is made of a complete ring, the internal diameter ofthe'same being of sufiicient size to slip over the collar 7 r and follower V 1 r'ingsf Q L and 25 when position d on the pistonf'red areturned in reverse directions, thevertical leg of the L ring14 being turned in each instance toward the'eomposite pack Mamie r f The outer Eff-5 1 121656 have free access from one portion of this compartment to the other around the inner end of the follower. And the follower ring is of larger diameter than the cavity 7 so that an abutment 1s presented to prevent the retreat of theparts with'the piston rod by compressing the spring 16, this spring being of less diameter for its full length than the cavity 7 so as to allow its being compressed entirely beyond the outer face of the head. By this means, the use of a pierced thimble between the spring and the follower or the use of a distance sleeve encircling the spring such as has heretofore been necessary has been avoided and the end room necessary for the application of the packing and the number of parts greatly reduced.

It will now be seen that the steam pressure will-act directly against the inner end of the follower to assist'the spring 16 in 35 tightly compressing the metallic packing a maximum of duplicate parts and in which there Wlll be greatly reduced wear on the sliding piston rod because of the relatively small pressure area reacting agalnst the piston rod in a radlal lyslnwar'd direction. At

V the same" time the parts are all so arranged thatthey may be readily assembled and dismantled without sticking of parts due to gummedoil: or carbon deposit. Slight clearance 1s allowed between the segmental portions of the metallic packing firings 11 and 12 so that the parts may be atjliberty to move inwardly under the influence of the steam pressure as they wear away. 1 1 1 5 face of the portion 14 of the vibrating ring is ground against the shoulder 1-0 :so;v as to provide a steam tight joint at this point, the steam pressure keeping the vibrating ring, tight up against the shoul- 12o 'derQ." The counterbored portion 9 of the gland'3 is continued at 21 to some little distancebelow the shoulder 10 so that dirt and other foreign. matter may not prevent the rproperseatingof the vibrating ring against the-shoulder 10.

- It will berealized that the wear of the Qcross-head; outside the cylinder and the wear "of the P1813011 Inside the cylmder will cause appreciable transverse movement of the pis- 1,216,503 was;

ton rod within the cylinder head 2 and the gland. 3. The flat bearing of the outer face of the vibrating ring 24 against the shoulder 10 allows this transverse movement and on this account is used instead 'ofa' ball joint arrangement. At the same time a steam joint is maintained. It is desirable, however, that these sliding surfaces be lubricated; hence I provide in the shoulder 10 the annular oil groove 26 which is formed concentric with the hole 8. Communicating with this oil groove is an oil passageway 27 leading from a cavity 28 in the outer face of the gland 3.

This cavity 28 is internally threaded at 29 to accommodate the threads of a commercial street L 30 which serves as an oil cup. Compressed between the end of the street L and the bottom of the cavity 28 is a bunch of curled hair which serves as an oil strainer. This particular construction is used, however, because it performs another and more important function. It occasionally happens that a steam leak will occur along the piston rod, past the metallic packing, or around the vibrating ring between the same and the shoulder 10. Without this arrangement both leaks would be manifested through the hole 8 in the gland 3 and it would be difficult to determine which of the two locations is responsible for the leak. The annular groove 26 and the communications therefrom to the exterior just described enable definite determination of the seat of the trouble inasmuch as vibrating ring leaks will follow out to and through the street L while piston rod leaks will be manifested as usual through the hole 8.

In order that the studs 4 and nuts 5 may exert a direct and straight pull in forcing the gland 3 against the head 2, short pieces of copper wire at 20 may be laid between the gland and the piston head just outside of these bolts, these pieces of copper wire be ing applied in a similar manner to that of the complete circle of copper wire 18.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A metallic packing for steam piston rods or the like, comprising in combination, a steam vessel, a pierced head for the same, a piston rod passing through the said pierced head, a counterbored cavity in the exterior face of the said head, the same being concentric with and ofslightly greater diameter than the said pierced head, gland detachably secured to the outer face of the said head forming a steam-tight joint, the said gland being pierced concentric with the hole in the said head to accommodate the said piston rod and having a concentric counterbored portion in its inner face of larger diameter said head and forming with the same a twoa ring encircling than the counterbore in the part, connected, steam cavity, a vibrating the said piston rod and having a flat, end face which cooperates with the bottom of the counterbore in the said gland to form a flat steam joint, a follower ring of larger diameter than the counterbore in the said head encircling the said piston rod and positioned along the same in spaced relationship with the said vibrating ring and having its inner face formed to overlap and abut the outer face of the said head when the piston rod and the said follower retreat, a composite, sectional, metallic packing ring, formed of a yieldable metal, encircling the said piston rod and adapted to be compressed radially against the same by the steam pressure and being disposed longitudinally of the rod in the space'between the said Vibrating and follower rings, the said rings being so formed and assembled around the piston rod as to form a steam abutment longitudinally of the piston rod whereby the internal steam pressure will force in turn the follower ring outwardly against the packing ring, the packing ring against the vibrating ring, and the vibrating ring against the flat face joint, the assembled vibrating ring, packing and follower ring being of less length longitudinally of the rod than the length of the outer portion of the said two-part steam cavity and being contained entirely within the said outer portion thereof, and a coil spring encircling the said piston rod within the counterbored portion of the said head and reacting longitudinally against the bottom of the counterbore at one end and against the follower ring at the opposite end, the said spring being of less diameter for its full length than the counterbore in the said head, the vibrating ring and follower ring each being formed of L-shaped half-ring sections with complementary complete rings of rectangular shape and each being positioned so that one of the flat legs of the l. bears against the adjacent side of the said metallic packing ring, the other flat leg of each ring being turnedtoward the said piston rod.

2. A metallic packing for steam piston rods or the like, comprising in combination,

a steam vessel, a pierced head for the same,

a piston rod passing through the said pierced head, a gland detachablv secured to amt, 1 ring encireling the piston rod: and positioned along the same in eirelingjthe"said'piston'rod and adapted to Q 7 "be compressed radially against. the same by the stearapressure and being disposed 1on- I V gitudinally of the rod in the spaeegbetween V 7 77 0 the} said vihratingand follower rings, the

around the piston rod as to form a steam 7 ah utnient longitndinally of the piston rod Y r wherehy'the internal steam pressure will force in turn the followerring, the packing ring and the vibrating ring outwardly [against the said flat shoulder of the counjterhore, an annular groove in the fiat face of the bottom of the said counterbore, the

said groove being adapted'to be covered by r the adjacent face of the said vibrating ring, and a passageway extending from the said grooveto the exterior of the said gland.

In testimony whereof I affix my signature in presence of two witnesses. sa d ;r1'ngs be1ng; so formed and'assembled V. HENRY H. ROYER. Witnesses:

O. E. BERGENDAHL,

A. K. SIM ONS.

copiie s ofthi s patent my be anne forifive eents eachyhy addressing the commissioner of Patents, V ,flwashingtonfl). C

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