US987296A - Stuffing-box. - Google Patents

Description

J. HAHN. STUPHNG BOX.

APPLICATION FILED NOV. 7, 1910.

Patented Mar; 21, 1911.

M 5|: u 1 n 4.l w. n I V/ x llllillll a stuiiing box by means of which the UNITED STATES PATENT OFFICE.

JOHN HAHN, 0F LOS ANGELES, CALIFORNIA.

STUFFING-BOX.

Specification of Letters Patent.

Patented Mar. 21, 1911.

Continuation of application Serial No. 568,033, filed June 20, 19140. This application led November 7, 1910. Serial .'No. 591,190.

4To all whom it may concern:

Be it known that I, JOHN ,Hanru a citizen of the United States, residing at Los Angeles,in the county of Los Angeles and State of California, have invented .a new and useful Stuliing-Box, of which the following is a specification.

','in various forms to prevent leakage between relatively moving parts, of many kinds.

An object of this invention is'to provide packing to close the joint can be adjusted to any degree of tightness; and also to make' provision whereby a chamber for 'oil or other cooling medium is formed around the pack-l ing as is desirable `for shafts, engine pistons and cylinders.

Cheapness, simplicity, ease of adjustment and freedom from becoming looseare other ob]ects .1n view.

Further objects and advantages'mayf-p pear from the subjoined detail description.

The invention is applicablein various shapes and in di'erent proportions and sizes. to meet the various requirements of different structures to vWhichit may be applied.

In this invention-provision is made for compressing or squeezing a long packing equally from both ends and from .all sides throughout its length, so-that.' the packing will aline the body that is 4packed and hold it in true alinement with the ends of the stuffing. box.

The accompanying drawings illustrate the invention in' some of the forms in which it may 'b e applied for packing cylindricalA bodies.

Figure l is an axial section of a stuiiing box embodying'this 4invention and applied in cylindrical form as-it might be arranged for the cylinder of an engine or a pump; and.

for the purpose of illustration, the inclosing case shown may -be regarded either as a j fragment of pump casingor of the cylinder of a steam or gas engine; and the inclosed body may be regarded -as occupying the-. place of the pistonof 'an engine or pump,- 55 or as the piston rod of anengine or as a propracticalli peller shaft, or as' the polishing rod of a pump. The parts are adjusted as applied for packing the vertical piston rod of a pump, and fragments of pump. 1

shown above and below the pac ng. Fig. 2 1s areduced plan section from the top o'f tubing are' Fig.- 1'. Fig. 3 isa reduced plan section on the irregular plane indicated at Fig. 1, showing-the upper ends of the dog members intact. Fig. 4 is a view of the lower. end of the upper section of the packing sleeve shown in Fig. 1. Fig. 5 is a side elevation of the middle packing section shown in Fig. l viewed from the slit side. Fig. 6 is a View analogous to Fig. 5 showing the outer packing ring that is next to the case in Fig. l. Fig. 7 is a side elevation of the compressible packing cage shown in Fig. l assembled as in use and detached. Fig. 8 is aside eleva'- tion in the scale ofvFig.' 1 showing the dogs for one of the wed ing members. Fig. 9 is an. elevation in re uced scale yof the inside face of one of the dogs shown in Fig. '8. Fig. l0is'a longitudinalsection of astullng box embodying the invention in a simpler form 'than that shown in Fig.` 1, andmapplied to the polishing rod of 'an' oilvpum'p.

Fig. .11 is a. side elevation of the simple compressible packing cage shown in Fig. 10. F ig. 12 is a reduced plan from the top of Fig. 10. Fig. 1 3- is a fragmental section on line w13, Fig. 10.

vReferring to the form shown in Fig. 1,

the body l to be packed is surrounded by a packing sleeve which is shown in three sections, the upper end section having a main body 2 and the lower end section `having a main body 3 and said end.'s'ecti`ons being practically duplicates. Between the main bodies of the end 4sections is held a middle section 4. All of said sections are; spirally split on' one side in such a. manner as to allow' the .sections to be separately spread open and applied to the body 1J from any side thereof, so `that each ysection' when conn pressed as hereinafterv described, forms a impermeable' barrier to the fluid to be pac ed against. In the,` end acking sections-2 and 3, which are of considerable length, the spilt 5' is tangential 4and the spiral joint faces atthesplit 5 extend in Alongitudinal traces parallel with the axis of the packin while in the middle packing section 4, t e spiral 'joint-'faces at the split 6 are'in a plane that is'aslant relative to the axis ofthe packing. Said packing may be` lining 9. Said lining and apron are tapered down toward .the outer end of the packing; and all arespirally split as indicated at '5 in Fig.Y 4;; the spiral split in said figures extending through the main body 2,' the band 7, the lining 9 andthe apron 8. The central' orifice 10 ofthe packing is preferablyiof the same diameter as the body 1- and the purpose of the longitudinal spiral joints at 5 and 6 is to allow the packing Sections to bev compressed without wrinkling and .to prevent leakage. Outside of the packing sections shown at 2,-3 ande and inside the aprons 8 a reverse'lytaperedl contractible packing-compressing cage 11 .is applied. Said cage is preferably formed of metal and constructed-of corresponding sections which are inter-locked in zigzag relation with eachl other to 'preventrelative longitudinal displacementaiad to allow movementA toward and from the axis of't-he packing. Applied to the opposite ends ofthe4 packing and to the opposite tapers of the compressing cage,

are two wedgi'ng members in the formof conical boxes 12, each having bearing sleeves 13`in slidable relation to the body 1, the

packing and the compressing cage. Preferably the wedging members 12 are provided,

with frusto-conical chambers or cups 14 fitting the outside of the packing and com'- pressing cage, so that when saidwedging members are movedttoward each other they body, and the packing sections may beap-y press endwise on the packing, and inward on the members of the cage, thus compress'- in'g the packing in all directions against the body l. The packing sections are placed in the box with their joints at 5 and 6 in staggered relationto' each other and zit-variant'- anles so as top-,increase .the'security against lea age. The middle packing section is com- .pressible independently of the end packing sections and -its joint is closable by pressure both transversely and longitudinally. of the packingzand thejoints of the end packing sections are closable'.by inwardly directed .pressure 'at right angles to the axis of the packing sleeve. By this construction maxi-` mum security against' leakage along and through the packing is, obtained with minimum compression ofthe packing, and consequently minimum friction on the packed plied to and removed from such body without sliding them over the end thereof. Suit-r4 'a beveled ring 29 the beveled able means which may be automatic or otherwise are provided for relatively moving the elements that effect the compression. A case lis applied outside of the wedging members 12 as shown in Fig. 1, and forms a chamber around the packing sleeve between the wedging members., Said case may be of any form t-o carry out the purpose of the constructor and may be the cylinder of a steam or gas engine or agsectionof pump .tubing or mayl be any other inclosing member to encircle a piston or A'a piston rod or other body to be packed and. may form a chamber of any character to hold lubricant or other cooling medi-um.

In. Fig. 41 said.

case is internally threaded at its ends, and

heads orv followers 1G, 17, are screwed into its bore for the purpose of' adjusting .the wedging members 12 toward each other. The force exerted by the followers may be supported or transmitted in various ways as by a tension spring 18 which is mounted on the follower 17 and bears against ajmetal washer. 19 which in turn bears against an outer packing ring 20 of hemp or othel-fsuitable Amaterial which engages a shoulder 21 of the wedging member 12to move such member. There is also shownin Fig. 1' a dog 22- providedwith detents 23 to engage notches 24inside the case l5, and also provided with springs 22" that contact the4 wedging members 12 and hold the dog in" position. Said dog is formed in two segmental pieces shownin Figil 8,2s`aid pieces I- iojo being somewhat less than semi-circular and each provided with a cavity'25 and with a recess-26 to accommodate the cup and the bearing sleeve df the wedg'ing member. Each of the followers 16, 17, is provided with a locking shoulder 27 which may be engaged by the ends of pump tubing sections 28 when the same are-screwed home in the case, thus -to lock the followers -in place and fix them as stationary heads. vThe dov-22 engages face of which slopes from the wedging 'member 154 `which is there provided with `the notches 24 into which the detents 23 of the dog engage thus to retain the 'wedging member. The beveled rin@ 29 wedges against a'nouter compressible packing-ring 30 to pack the notches 24 and prevent leakage from or to the annular space between the wedging members. The wedg-' ing members 12 are externally stepped at 31 and 32 to receive the pressure of the dog 22, the bevel metal ring 30 and the packing ring 32, and 'thereby applies force to .move the wedging member toward the thicker middle portion of thecompressing jacket,

thereby -to contract said jacket. When it isl desired to doso the beveled ring 29 and the packing ring y32 may be dispensed with and the dog 22 applied4 directly to move the wedging member or the dog also maybe dispensed with andthe follower 1G screwed directly onto the wedging member. When a dog is to Vbe employed in'the packing for a pump it will be made of such gravity as may .be'required ineach case to eiect the desired compression of the packing without excessive friction upon the vpumprod` The followers may be provided with wrench seats 33 to receive a Spanner wrench or otherjdevice by which the followers may be screwed home.`

In the form of cage shown in Figs. 1 and 7, va number of bars or slats 34 are joined together in zigzag relation to form a hollow vslitted body that is internally cylindrical;

each of said slats being externally ,tapered from the middle to the ends and provided at reverse sides and ends with a seat'v35 and a tongue 36; said seat and tongue being complementary and correspondingly circular so t and the wedging members to accommodate" that the'tongue of one slat'and the seat -of the adjacent slat pivotally interlock to form hinges alternately at 'the ends of the cage, so that either .end of the cage may be contracted' or expanded independently ot the other end. A s thecage expands it shortens and as it contracts`- it lengthens. .The ends of the cage are inserted in the spacesbetween the bands. and linings; the slats being ex-v ternally shouldered at 341 thus to form a cavity betweenthe taper tips of the slats the aprons 8. and their linings 9. When the cage lengthens and contracts it presses end [wise on the packing'at the tips and also inward on the packing. along the main bodies andY also outward on the aprons and the thrust is withstood by the wedging members and the body 1.

In the form shown in Figs. 10, 11, 12 and -13'the hollow wedging AI nembers 37 and 38 screw together to inclose the packing, and have conical cavities `inside to engage the reversely tapered `packing compressing cage which in this form, as illustrated in Fig. 11, consists of two corresponding semi-circular metal segments 11. each provided with staggered slats 34" 'and with `seats and tongues 35?, A355.', 36', 36". tohold the segments againstl longitudinal displacement, thus lto render the cage compressible toward the axis after the manner of the cage shown in Fig. 7 The wedging membersy 37, 38, when screwed 'together forma substitute for the case 15 Wherever it isdesired'to circulate a cooling medium around the packing this may -be accomplished by providing the case with a passage as at=39 and 40 to allow the medium to enter and escape from thecooling chamber 41 -inside the. case.. In Fig. 1 the pipes 39 .and 40 form the inlet and outlet from such cooling chamber.

Tlie packing may or may not be perfolrated thus forming passages to allow a 'medium..to flow; from ortowardthe body that is packed. In Fig. 10 a number of such passages 41 is shown.

The wedging members 37, 38, may be rprovided with wrench seats 42 and 43, so that they may be readilyturned.

- In practice the stuiling'box lparts may be assembled originally by sliding onto the body .to be packed the various elementsv which are to surround the same; said elements being put in the relative -positions shown in Fig. 1. All the parts to .surround the body 1 may be assembled independently of said body 1 and the body 1 may then be slipped into the stuing box. 'Ihen assuming that the tube sections 28 have not been applied the `followers or either-of them may be adjusted, thus bringing. the wedging members sufficiently-close together to eect the desired compression, then the tube sections 28 may be screwed into place, thereby locking the followers; in fixedl relation to each other and the other parts.

If at any time, the packing-becomes worn a tube ,section 28 may be unscrewed and the follower thus made available may be screwed in to tighten 'the,packing. As the dog is moved along for this purpose it will spring back as the detents pass the notches and vthe springs 22' return the detents into the notches. In the case of a vertical stufling box the weight of the dog 22 may be sutlicient to lforce the wedging members down to take up the'wear.-

-To remove the packing the tubing and ne of the followers may be unscrewed, thus allowing the case to' beslipped voli? of the active parts of the stuling box. Whereupon the `wedging. members'-may be slid apart, thus giving access't'o the cage and then the vsections of the cage may be separated and the sections of the packing..sleeve may be withdrawn laterally and replaced with new. In the form shownin Figs. 10.and 13 v'it is suiiicientI to simply unscrew the Wedging members from each other, thus giving access to the internal parts. 4 4 shown in Figs. A10 and 13 isunitary and is provided with a slit 5V k,corresponding to the slit 5 of Fig. l. Theshoulderse rat the ends are devoid of th'efaprons shownin Fig. l-and contact with the?- conical cups oi the wedging members42, 43, .thus-.tobe lsqueezed endwise radially as the wedging members are screwed home upon the contractible cage 11.

' The spaces between the slats or bars' of the cagein either ofthe forms shown constitute channels in which the cooling medium or lubricant may circulate to cool Vand lubrilcate the packing.

I claim .v .'1. The combination with a body to be packed, of .a compressible packing sleeve around said body'; said packing sleeve being tapered toward its ends and provided be- The packing sleeve yllO . gether y :'the tapered ends thereof, 'and means in the to be packed.

tween the ,taperedi-portions with arecess, wedging members adapted '.to be screwed toto inclose the packingl and to .engage recess to hold the packing toward the body 2. The combination withA a body to be packed, of a split packing sleeve around said body; said sleeve' being provided with shoulders at` its ends, wedging members around the sleeve contacting withfthe .shoulders of the sleeve, and/means between the shoulders to compress the sleeve. l

3. The combination' with a body to be' ,packed of a split 'packing sleeve around said body, said sleeve being provided with shoulders at its ends, bars arranged in zigz 4' zag. relation: between the shoul/ders and each 4other around the'sleeve and between .the shoulders and between the the sleeve. Y. I

4. The combination with a; body to be,

around the sleeve, wedging members contacting with the sleeve and .with thev bars and means .to move the barsand compress packed of a spirally split packing sleeve provided with shoulders and aprons at its ends, bars arranged in'staggered relation' to aprons and thebody ofthe sleeve, and means for wedg ing-the sleeve, apron and bars tov compress V'the sleeve.

5. The combination with a body to be' packedl of a compressible packing sleeve r bars arranged in staggered relation to each.

around said body, said sleeve being provided at its ends vwith shoulders and with aprons,

other around the sleeve between the shoul- V body of the sleeve and means for ders and between the apronsan'd the main thesleeve, apron and vbars to compress the sleeve endwise and. laterally. l

.6. The' combination with abody to be packed'of acompressiblesleeve provided at its ends with shoulders and aprons, bands around the ends of the sleeve inside the aprons, linings inside 'the aprons, bars'ar ranged in staggered relation between the aprons, and yhollow wedging members to wedge the aprons and the bars to compress the sleeve.

7. In a stuffing box the combination with a packingsleeve of hollow wedging members around the ends ofthe sleeve, a case around the wedglng members and means in side the case .for 'relatively moving the' wedging members to compress the sleeve.

8. In a stufling box the-combination with a packing sleeve,`of bars arranged in stag-4 gered vrelation around. the packing-sleeve, hollow wedging members around the ends of the sleeve and bars, a case around the wedging `members, slee-ve and bars, and means inside the case to relatively move the wedging members to compress the bars and wedgmg.

compress tractible and rprovided with c means to sup 9. The combinatiemwith a body to `-be 'l packed of a compressible vpacking sleeve around said body, a cage composed of bars in staggered relation to eachother around the sleeve, hollow wedging members around the endsof thesleeve and cage, said wedging members having` external shoulders, a case around the wedging members, said case being externally screw-threaded at its ends -and provided with notches, packing rings around the wedging membersand against the 'shoulders thereof, rings around the wedgingmembers and against the packing rings, a spring against one of said rings, a dog 'having detents to engage the notches and arranged against the other of said rings, said dog being formed-in parts, and followersxscrewed intolthe case against \the' spring and the dog.

io.` The combinati@ with` Aebony tobe Ypacked of a compressible packing 'sleeve around said body, a cage composed of bars in staggered relation to each otherl around the sleeve, hollow wedging members around the ends ofthe sleeve and cage, said wedging members having externa shoulders, a

V case around the wedgi-ng members, said case beingexternally screw-threaded at its ends the shoulders thereof, rings around the wedg- .and provided with notches, packing rings around the wedging members and against ing members andagainst the packing rings, i

a spring against one of said rings, a dog haying 1 arranged against the other of said rings, said dog being. formed in parts, followers screwed into the case against the spring and the dog, and-,means screwedninto the case to lock` the followers.

f ll. The packing sleeve provided at itsl ends with shoulders'extending around vthe sleeve, a contractible cage' between the shoulders, and means inclosing th'epacking shoulders to compress the'same" and `withthe A'cage to contract the cage and thereby to shoulders. I

12. The combinationwith a case and a `bodyinside the case, of a pack-ing sleeve arranged outside the body having shoulders at its `ends and recessed to'form a chamber between its ends and provided on said shoulders with frustoconicalaprons, metallic lining inside the aprons, metallic bands around theends offthe packing sleeve, a cage in the chamberg-said cave being conhannels for a lubricating or "cooling medium followers between the `ends of the packing' and the caseto Contact with' the packingand. theV cage., and to compress the packing, and

medium to the chamber.

13A4 vstuiiing box' comprising. spirally' detents to engage the notches and' the packing intermediate the-l sleeve. and cage and contacting with*v the ply a -lubricating or copfling split packing and means to compress the sleeve packing from all sides toward the center to aline the' packed body with the ends of the stuifing box.

14C. A vstuffing box comprising a packingl sleeve and means to compress the packing from all sides toward the center to aline the packed body with the ends of the stuffing box; hand means to .form a` chamber around the packing practically throughout the length of the packing to contain a cooling or lubricating medium.

15. In a stufiing box-a packing compress ing cage composed of bars longitudinally spaced apart and pivotally connected at their ends so as to be relatively movable toward andfrom each other.

16. The combination of bars arranged in zigzag relation .and provided at their reverse sides and ends with seats and tongues pivotally interlocked substantially and for the purpose set forth. f w

17. In a stuffing box the combination with packing, of bars arranged in zigzag relation and provided at their reverse sides and ends with seats and tongues pivotally interv locked and' means to move the bars to coml press the packing` 18. A packing cage composed of slats hinged together alternately at the ends of the cage."

19. A packing cage composed of slats provided on their reverse sides and ends with seats and tongues and thereby alternately hinged at opposite ends of the cage so that the ends of the cage are independently contractible. ,l 1

20. A packing externally recessed between its ends, a contractible cage in the recess and means to contract the cage.

21. In 'a stuliing box 'movable means to compress the packing and adog to hold said' means to .tighten the packing,y

22. In a'stuihng box a case around .the packing and' provided inside with notches, means inside the case to compressthe packing, and adog formed in parts and'provided with detentsrto engage the notches `to tighten the packing.

23. The packing sleeve'provided with an' apron at 4its end and vmeans outside and within-the apron to compress the sleeve.

29th day of October, 1910. 1

,241. A stuiiing boxA comprising a case;

compressible packing arranged inside the 'case andl provided with aprons at its ends; and

4contractible means around the packin inside the aprons to compress the-pac ring; boxes to compress the aprons and the contractible means; means to adjustone of the boxes, in the case and resilient means to support the thrust of the other box.

25. The combination with a case 'lof a spring,

sleeve,packing inside the wedging member, contractible means arrangedv with one end inside the wedging means inside the wed ing member, packing inside the contractib e means, wedging means laround the other end of the contractible. means tocontract the same, and means toadjust the lastnained wedging means. l

l26. The combination with packingof Vcontractiblemeans arranged around-and adapted to compress the packing, wedging means to contract theycontractible means, va case around the wedging means, ak packing-ring between `the Wedging means andthe case, a

beveled ring on the packing ring, a dog to engage the beveled ring to'inove the packing and the Wedging means, and, means vto hold the dog in adjustable position.

rin

27. 'I-he combination With packing of lcontractible means arranged around and adapted to compress the packing, wedging means. to contract the contractible means, a vcase around 4the w-edging means, a packing 'ring between thewedging means and the' case, al

beveled `ring on the packing ring, a dog to engage the beveled ring to move the packing ring and the wedging means, means to hold the dog in adjustable position, and a spring vfastened to the dog and adapted to Contact. l

with thewedging member. In testimony whereofl set my hand at Los Angeles, California, this v. JOHN HAHN. In presence of- JAMES R. TowNsEND, OLIVE 'DEFENDERFER means to support the s ring, a washer on the spring, apacking s eeveonv the washer, a wedging member inside lthe Washer and packing sleeve, a shoulder to receive the thrust of said washer yand packing I have hereunto

Images