US1476795A - Regulating mechanism - Google Patents

Description

Dec. 11 1923.

F. H. BROWN REGULATING MECHANISM 'Filed May 22,

mula

Patented Dec. 11, 1923.

UNITED STATES PATENT OFFICE.

FRANCIS H. BROWN, 0F GLEN OLDEN, PENNSYLVANIA, ASSIGNOR T0 PETROLEUM HEAT AND POWER COMPANY. OF BOSTON. MASSACHUSETTS, A CORPORATION OF DELAWARE.

REGULATING MECHANISM.

Application flcd May 22.

To all fiom [i muy conce/'lz' Br it known that I, Fun-is ll. lnotvx, a ritixen of the United -States, residingr atv (ih-u (lldrn. in the county ot' Delaware and State of Ieii1is ,'l\'ania, have invented an Improvement in Regulatilngr Meehanisin, 'of which the following; description, in ronneetion with the uveotnpanying drawings` is a speriliration, lilte rharneters on the drawingsl itpresentinp1 like parts.

The invention to he hereinafter desrribed relates to regulating nurhanisrn adapted to be used in ronnertion with furnaces of strain generators and fory other purposes.

In regulation of rolnliustion ronditions it is desirable that the apparatus .shall be reA sponsive to a pluralit)` of-fartors, such. For example, as variations in the pressure of the steam developed h5' thtl genrratm, and variations in the pressure of thtl kinetir steam or the steam flowingr from the treiterator in arrordanre with the load or demand thereon. t; is desirable that. the apparatus shell be sensitive to slight variations in the pressure. and that these variations muy be employed to regulate the` supply of fuel, the draft or other conditions attendintr conibustion. but that the apparatus shall have snicient power positivelyv to control the means regulated thereby.

Une of the purposes` of the present invention. therefore, is to provide a inerlmnisin u'hrh will lw responsive to a plurality oli ronditions or fzntors, suclx, tor example. as miriations in stutir and linetir pressure olA the steam developed b v n generator. and roti trol the suppl)- of motive llnid to a motor wliirlrivill furnish suliieient power posi'- tively to operate the. instruunntalitv to be controlletfl thereby.

In the present instaure of the invention, the motor is in 'the forni of a v vlindrr rontaining: a piston I1nd providrd with :i pilot valve lor controllingr the supply ol' ronn pressed nir or other motive lluid to the rylinder. It` is desirable tluit the piston shall he Inot'd in tlu' t- Vlinder with a vaiving length of trawl depending upon tlnI extent of rontrol required. lu other words` it is' desirable. that tht` piston shall he moved a certain amount and then autom?.tit-Tail)4 arrested, and the point of' arrest 4should be varied from time to time,

Another purpose of the invention. there- 1920. Serial No. 383,553.

Fore, is to provide simple and efficient means whirh may beoperated by movement of the motor or piston automatically to arrest the sinne as required, and this arrest may oerur after the pilot valve has been shifted by either of the devices responsive to variations in static and kinetic steam pressure.

With the aforesaid and other purposes in view, the character of the invention may he best understood b v reference to the tollowing,r desrription of one good forni there ol shown in the aecotnpanyiner drawing, wherein:

Fig. l is a front elevation of a regulating nirrhanisni embodyingr the invention, certain parts thereof being shown in seetion;

Fig. 2 is a horizontal section taken on line Q--Z of Fig. 1: i

Fig. it is a horizontal section taken on line It-- of Fig. l; and

Fig. 4 on an enlarged Scale is a perspective view of parts shown in Fig. 1.

Referring to the drawing, any suitable l'orm of motor may be enn'iloyed, in the present instance, com rising a cylinder 1 containing;` a piston 3 connected by a stem 5 with n fratrie 7 guided in extensions on the tvlinder 1 antlprovided with upper and lower eyes 9 and l1 adapted to he connertted to an).r regulating instrunu-ntality to be rontrolled thereby, sut-h, for example, as valve nu-rhanisn for rontrollinplr the feed olq tnel to tlulurnare, and dempers for controlling tlu` draftl'or the furnace.

tit designates the sti-ani main ot a steam vgenerator u'hirh ma)` be ol' any suilablr t'orin oll well known eonstrurtion, and there' fore, it` is unnerrssury to show the sanie herein. .'\n oriliee device l5 may be mountA ed in this strani main, desiralily ol` the ron- `motion disclosed in my ropendinirl appli ration Serial No. 368,665, tiled Marra 25, liljtl.

As stated, vthe nlotor tnt15v be operatedin response to varyingr conditions, but for purposes ot' exempliliration, in the present instanre, the motor is operated in response to variations in Statie and kinetit steam pres sure. l

'lhe devre responsive to static Steam pres sure, in the present instaure. f -oniprises a raising 17 containing: a. diaphragm t9. said easing being conveniently mounted dirertly beneath the cylinder 1. The upper side of bil tho diaplrragm 19 muy 'oe suiijevleci to variotions in stativ pressure or' the stumm through u pipe 2l communicating with the 'italic pressure side of the orifice fiorire i5. miei pipe being provided with u usual vulve 23.

The device responsive lo variations in kinrtiv pressure of the strana, in the present. instaura. romprisos u (using 25 containing a dinphrugrm 27, the upper sirio of which muy iw suizjortwl to variations in liinrtic Steam pressure through u pipo 29 rommuuieating: with liua orivv of rho fiorire l5. Said pipe living proriilrfii willi :i Hsu-.1i valve. 3i.

Kim-lio pressoir muy he ohtuinwl within the pipe 2li h v forming tho oriiiro device l@ so lhu. cormnuuiuulmi provided hotwnen the and of he 'pipo S29 and the inner periphery of the orifice in the elevire l5. tho urrangement iii-ing Sur'u that ilu. pressure will he taken at ihr point. whore thv Srum pusszs through the oriiiiig Qim'f nl. this point the pressure vario iu urrrirunro with the flow of Strani .incl static pri Sura? may hu oliu ruime] wihiu iw pipe hy forming the. orifice ilrviro lli with ports lending frmn our or iiolz Siders of lim oriiire derive in ihu @u1-l of tho pipe El that ih@ prpssure may he token to one sirio of tho path of travel of the steam through tho nrioe in the device l5, all as more fully set forth in the application above mentioned.

It is fiesimbio that the. opmsite sirius of the diaphragmsr 19 and i?? shall be suljeoted to ulvielziing` pressure in opposition to the si'atic und kinetic pressures on the 11p-- per sides thereof. To nrfompiish this, iii the present instance, a cylinder 33 muy he provided containing un inverted cup 35 and adapted to be filled with waiter or other liquid so i0 leave en air cushion 37 in (he Pup. The (fusing may communicate with the unrlrr sirio of tho diaphragm lll und the uurior sido of thv diaphragm 3T rvspvrtivoly through iaruurh piper fill und il ronnorifil in lui-n hy :i pipo #i3 with the rau-ing 33. o: id hrunrh i'iipon living: prmiilsul willi fn-iwi: 45 and 4T.

li is llrnirulnle tlml ho oir ruuhinn shall be subjertod to a prodotormined working pressure which may dosirnhly he ho working pressure of the steam desired in the main 13. To establish this pressure in the casing a pipe 49 muy he provided having one end communicating with the pipe 21 referred l@` and its other end communicating with the easing 33 the pipe 49 being' provided with a usual valve 5L The sonstruction is such that 'when the valvrs. 23 und 51 are opened, the casing' S3 will ho suhjeved to the otatif pressure of the steam in the main 13, and n fr this pressure has heen established in said casing. the valve. 51 mag,y

be rinsed so as to maintain the same therein,

and the lower sides of the diaphragme, 19

uufi will iio .suhiocted o this presure upon owning ihr; mirra 45 und 4T.

lf liuI prrsruris nhovo iii/e diaphragme; l9 und 2T @Quill tho predetermined working prossurv Psluhlishr on Lim vir-.hing the fliab phi-umm will remain slutioumy. hufif tho slutir und .kinotir prvssurvg uhmm said (liajlz-lirugm rim. ohwo or full below such pressur@` ihr llinplsz'ufium will 'nu morvil ncf -orfl ingly.

oxwns'ihlv liuii fi? Wih u. rohe loros* 59 pirolzilly vomir-riad lo rho diaphragm E9 :mil fuirrurnml sin liu? f. 711mg; il". Tho pppn siii-s ruil oi' the lavar 35i )non u lifflirsuiii( (il pirotuil f' mounieii iin-'erwin ilu-1 urn@ izl of said lifelrrmik living; minfin-toll hy u link $5 with rho rmi of the piloi miro (i7 mounted on the oyiinlier l, for controlling the supply of motivo liuid o said cylinder from any suitahle source. Since this pilot valve muy he of weil known oonstruction, it is unueoessary to show and (inscribe tho sumo in do tail herein.

ThoY other arm 69 of -zhe bell-crank may be pivoluily connected by a link TU to one end of u rausmilting lever '71 fulorumeli intormediato its (and on n. roch arm Til fuhfruined on n hrm-.liet oonveuieully mounted on an extrusion of the lower houd ol lim ffyliuiier l. The rock uriu may have un arm TT projectingr oubsnnliuily nl righi inging there from romiecllod hv un elwnsilllo link 7? with u Volw loro!" R1 Viwilully muni-tml lo iiw. diaphragm 2f um! iuirroinvl m this ing 25.

Tho urinoir* und of the. lruuuniiiliugr lover 73. may he connected by s. link or member 83 wilh #he upper end nf o rock arm or stand arri B5 having its lower mul pivofully mouuted on u bracket: 87 conveniently mound on an extension of the lower head of the cylinder 1.

Pivotaily mounted on the standard is a shoe. 89 having' an inclined bar 91 slidably mounted therein, ille lowor par?, of said bar being pivotally wounded to and carried by a bracket 92 ou the reviprocatory frame 7 referred to. This bar may he ser at digerent angie@ of adjusmeut with raisport. to said flume by un adiustingr screw 93.

Tri operation.l variations in static steam prosfmra will be rransmitl'prl through the pipe. 2l to lelieV upper side of ihe diaphragm lOD tween the Sscond preure actuawd means fund a different partiva af the transmtngf leven u. lever mnlmted in be ed lawfully by the tmvel of Suid pisteimi mul n comme@ time between Snx last mennned lever amd x1 hll particu of the xanmitag lifafr m pa :1 cunntemctng mm'eml to the pl mlve n wn move'wm of tml pstnn,

4. The cum )inalion of a cylinder', u pistcm therein. n frame, mmmecfi fm' movvmnt by the piston, u pilot valve fm.' flrffllng the supply of nmtiw ud tu the cylinder, pref sure actunt'ecl means for {'qmrutng the pilot alvv, :1 Sevmxci und inclepcneu, {areasure actuated means, lmnpmatng tlm pilot valve?, und means fur m'tmling the pilt valve in s efaponse tu th(J cemxnual mgon uf th@ twv@ pmxsum uct'uuwl mama` and 'issn in epfms? from mail! rock am: tu said. llel-ffmnk to www-.w the plint mlm.

In elelxmouy f'llerefs l huw signe my msm@ to lus. specifciitlonA FRANCIS H.. BRWN.

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