US1769082A - Mixing device for oil burners - Google Patents

Description

July 1, 1930. I A. A. STUTZMAN 1,769,032

MIXING DEVICE FOR OIL BURNERS Filed June 1926 2 Sheets-Sheet l INVENTOR July 1,1930. 'A.A.*STUTZMAN 1,769,082

MIXING DEVIQELFOR OIL BURNERS lip MESS WW fi Jihad -v 1 flTTOlP/VEY inregistry with theports;

Patents-elderly 1,1 19130 v v A i ALFRED srnrzrraiv, or ALIDAN, rmm:sYLvAnra MIXING nnvrcn non orr. BUBNEBS Application file d lune 9, 1926; Serial No. 114,601.

My invention relates to oil burners andpar- My improved burner comprises a suitable tic'ularly to that type designed for use in base or bed 1 which is supported, as by legs 2, heating houses and'other buildings, and the at a proper elevation in front of the furnace bj f h invention i t id an i not shownr but indicated partly in dotted proved apparatus of this character which 16 "60 Which It 8 appl ed- OU d .may'be employed in connection with any of th1s base,preferably the endthereof re;

' the usual types of furnaces, and which is flomihe ,1 ar tary p mp to 1 adapted toburn fuel oil of low specificgravthe Inlet 4 f Whl h 1S HII ed a supply plpe ity so as to effect a material economyin heat- 51eaCl1I1g-fr01'n the Storage tank ot shown) t for-the fuel 011.. I 50 Another object of theinvention is to pro- The p l p y be o Suitable 39113311191 vi'de an oil burner having improved means andiln, e P 3 lnsliimce of gage! for metering the oil, which will effectually yp r ShPWH 111 d comprlses regualtethe quantity used, and which is not irotolle hallng l l' genes of 11115613111 1 likely to become clogged even when used with 1 gear Kieth 7'mes h1ng eearrwheel Edls heav'y 11 and hence maintains a d and posed ineccentric relation thereto. The gear even a 7 wheel; 1s carried by and mounted to rotate A'further obiect of the invention is to Profreelynn) a pm 9 Proficient m from videmeans for checking the flow of oil when face Plate 10 of t p 1 l casing The the device is stopped, so as toprevent What t platealso i Web or Partltwn 12 is known as flooding, which Causes Serious which 15 of substantially crescent shape and difficulties and often results in back firing. extends part Way around fihe giar"wheel 8 With these and other objects in View, inand betweenthe Same and the gval teeth l The rotor is carried-lb a shaft 13 which "is Ventfin ,gp p g vanogs H0261 fi i journalled in, and pro iects beyond, a tubucons-m0 1011 an arrancemel-l o 6 P S lar bearing 14 extendino lon itudinally from hereinafter described and claimed, and 1llusn b trated in the accom an in drawings in the Pump caslng 011 the QPp0S1te side thereof h y i y from theface platelO, the bearing being pro 1 W a v V vided at its extremity with a stufing box 15 1 a longftudmal t l of to prevent possible escape of oil fromthe burner" v i interior of the pump casing. y I i 2 plan Vlew thgreof; On the rotation of the shaft 13 the pump 3 18 an enlaf'ged d secmonal draws the fuel oil through the supply pipe therepff01111116llnegwgoiFlgaz? 5 and delivers it under pressure to a feed 35 1s a enlargedfletmled iseptlonal pipe 16 connected tothe outlet 17 of the VIQW 2 t 1,1116 of showlng h pump and leading therefrom to a metering {neterlllg devlce Wlth the grooves'out o r s device 18. Located in the feed pipe is a re 3 h erq =j lief valve 19=which opens outwardly to permit F g- 5 1S a 55111111211 719W Showing the grooms excess oil to be bypassed therethrough and r escape into an overflow pipe 20 that returns 13 an e e 'V 1 9 it to the storage tank. The valve may he tlong l S 111 0 of the PU Pi and suitably adjusted to regulate the pressure at 5 7 13 a a g transverse 8805101131 Whichit will open and thus control the presview of the atoniizerythe section being lien Sure ithi th f dw i 16 ,1; hi h th 45 011 the line 0f g-2; n 7 oil is delivered to'th'e metering device. A

Fig 8 .iS a transverse section on the lure gauge 21, mounted on the feed pipe, indicates 11-11 of Fig. 1. the oilpressur'e. The end portion of the feed 7 Similar letters of reference are used to inpipe 16 connected with the pump 3 extends, dicate similar parts throughout the respecupwardly therefrom in substantially vertical 50 tive views. P a i position while the intermediate portion of chamber 24 having an inlet 25, with which the feed pipe 16 is connected, andan outlet 26 in communication with a pipe 27, The

- metering chamber is divided between the inor ports.

let and outlet by a transverse partition or metering plate 28, which is preferably clamped in position between the casing sections 22 and The metering plate is formed with a conical seat 29 facing preferably on the inlet side thereof, and with one or more ports 30 communicating both with such seat and with the metering chamber on the outlet side of the plate. In the present instance there are two of these ports which are arranged diametrically opposite each other. Fitting within the seat 29 is a conical head 31 provided at one end of ametering plunger 32 and formed in its periphery with longitudinal grooves 33 preferably corresponding in number and relative position. with the ports 30, so as to intermittently register therewith as the head is rotated on its seat to permit smallquantities of oil to escape through the metering plate 28. It is to be noted that the grooves flare gradually, orincrease inwidth, from the base of the conical head to the apex thereof, while the ports 30 are of a diameter preferably slightly greater than the width of the grooves at the point of registry. This prevents possible clogging of the metering device even when heavy oil is used, and causes the device to clear itself if any solid matter in the oil tends to become lodged in the grooves The amount of fuel oil flowing through the metering device is regulated-by interchanging metering plates having different sized ports and plungers having different sized grooves, or by regulating the relief valve 19 to vary the pressure under'which the oil is delivered to the metering device.-

'The plunger 32 extends longitudinally of the metering chamber ith its end portion remote from the head 31, telescoping with a spindle 34, and received in a longitudinal socket 35 in the adjacent end thereof. A pin 36 passes transversely through the plunger and has longitudinal play in slots 37 extending outwardly through the spindle on opposite sides of the socket 35, whereby tapermit theplunger to move longitudinally independently of the spindle, but to hold such parts against any relative turning movement. A coiled expansion spring 88 is located within the socket and exerts a longitudinal thrust on the plunger to hold the head 31 against its seat. The spindle, 34 is jourthat this pin projects into the latter.

nalled in a bearing 39 in the casing section 22 and terminates at its other end in'a disk 40 provided with an outstanding eccentric pin 41 by means of which the spindle is rotated as hereinafter set forth. To prevent leakage through the bearing 39 a stuffing box 42 is preferably mounted therein around the spindle and has alock nut 43 by which it is retained in position. a

The oil discharged through the metering plate is no longer under pump pressure and flows through the outlet 26 of the metering chamber and into the pipe 27. This pipe extends horizontally from the metering device and then upwardly to a height above the hori-' zontal intermediate portion of the feed pipe 16 and thence horizontally to connect with a stand pipe 44, open at its upper end to the at- .mosphere, and connected at its lower end with the inlet- 45 of a rotary atomizer 46;

The oil rises in and fills the pipe27, flowing along the upper'horizontal portion thereof, and overflowing into, and dropping down, the stand pipe 44 so that air and oil are fed together into the atomizer.

It is to be particularly noted that the feed pipe 16 and the pipe 27 are so arranged that their adjacent portions provide a substantially Ufshaped trap, with the metering device located in the base or central portion thereohone leg of the trap being constituted by the vertncal portion of the pipe 27 and the other leg by the adjacent vertical portion of the pipe 16,'and the former extending somewhatabove the latter. important in case the. apparatus should be stopped with the grooves 33 in registry with the ports 30, and prevents an excess of oil escaping in that instance into the pipe 27 and flooding the stand pipe 44. of the device the pressure created by the pump 3 is quickly lost and if the metering device is in open position the oil tends to find its level in the trap under substantially atmosphcric pressure.

The atomizer 46 is in the form of a rotary air compressor of any suitable type and preferably comprises a rotor 47 mounted eccentrically within the casing 48 and provided with a plurality of wings or, blades 49 sliding in slots 50 of the rotor. As shown the slots extend diametrically through the rotor and each contains a pair of blades, between the inner ends'ofwhich are interposed coiled expansion springs 51, which project ClKQOU'GBI ends of the blades beyond the peripl cry the rotor and against the ini er surface of the casing. One of these blades formed in a side edge with a recess 52, adapted to receive the eccentricpin 41 of the spindle 34-, the casing section of the metering device being so united with the casing 48 of the atomizer A driv ing connection is thus providedbetween the rotor 47 and the spindle 34 whereby to cause This arrangement is On the stopping supports the atomizer the metering device to be operated from, and

simultaneously with, the atomizer. V 3 Therotor a? is carried by a shaft 53 journailed ina tubular bearing fig-extending longitudinally from the atomizer casing 48 on the opposite side thereof from the metering device, theshaft projecti-ng through and beyond ajstuiling b O X 55 at theouter'endofthe bearing; The bearing 54 is held in, a pillow block'56 which islocated. on the base 1 and forced out under pressure through the outlet 57 of the atomizer in the form of an atomized mixture in which the oil hasbeen broken up v into minute particles insuspension in the air.

Beyond the outlet 57, andb-etween the same and the inlet 45 of the atomizer, aidrip pipe 58 v 'is connected to, and communicates with, the

- interior of the casing 48, and provides an escape for any oil which has not been atomized, and still remains in a liquid state, the drip pipe extending downwardly and'thence substantially horizontally, and connecting with the overflow pipe 20 so as'to drain intothe same and return theoil'tothe storageitank.

The. drip pipe is provided with a vent 59,

open, to the atmosphere, in order to prevent the drip pipe from creating a suction within the casing-48, which would tend to retard,or

impose a drag on, the atomizer. l

The outlet 57 discharges "into a delivery pipe 60, which is preferably provided with a pressure gage 61, and is preferablyinclined downwardly, projecting beyond the basel and communicating with a nozzle member 62, arranged 1n sultable relatlon to the combustion a tapered seat facing on one side thereof chamber of the furnace. V

The ends of the shafts 13 and 53, projecting beyond the stutling boxes'loand 55, respectively, are suitably coupled together as by a transverse pin 75,1driven through the shaft 13 with its ends seated in recesses 7 6 in the hub 77 of a driving wheel 7 8 fixed on the shaft 53. -Power is suitably applied, to this driv ing wheel as by a belt 79 driven by a'n electric motor 80 mounted on the base 1. The

shafts 13 and 53, and the spindle 3 4,are all disposed in longitudinal alignment, and be ing coupled together,form in effect a. single shaft extending lengthwise of the device, and

serving to directly and simultaneously operate the pump, metering device, and atomizer, with the moving parts "all revolving on the same axis. This makes for simplicity and elliciency, and reducesfriction and noise in operation.

The operation of my improved oil burning apparatus, whensthe. power is applied, will be obvious in new of'theforegoing description. It will be seen thatI have provided an apparatus which is simple and compact in construction which ma pens'ively manufactured andeasily installed foruse in connection-with anyof the usual;

types-of furnaces; which consists of-few parts andis not likely to get out of order;

which is efficient, safe, and positive in oper- "ationyand which is adapted-to burn heavy oils and thus 'nomicalbasis; I A, 1 1 Having thus described my invention, I

be'readily and inexproduce heat on ajvery ecoclaiman'd desire to protect Letters- Pat;

'ent-of-*-the United State's: i V y y i h 1.'Infari oil burning apparatus, theeombination of a rotaryair compressor, an air intake pipe connectedthereto at its low'er a metering device, means including a rotary pumpfforsupp'lying liquid fuel -thereto,fand I a pipe extending upwardly fromthe metering device and communicating-"with and ar I .pressor and a rotary metering device, all coup-y ledtogether for simultaneous rotation, and

means for conducting liquid fuel from the-c pumpto the metering device and from the including a trap located between the metering device and said compressor and open to the atmosphere.

3. In an oil burning apparatus, the commetering device to the compressor, said means 7 bination of a casing having a metering chamher and an inlet and an outlet therefor, a metering plate dividing said chamber between said inlet and outlet and formed with and with a port communicating both with I said seat and with saidchamber on the other Side of d p ate, a rotory metering plunger 1 having a tapered head fitting said seat and formed in its periphery with a groovewhich 1s in continuous comunlcation wlthsaid chamher and is adapted in the rotation of the pluni ger'to register intermittentlywith said port,

and means for pressing the head against said seat, i j

4c.v In an oil burning apparatus, the combinatlon of a casing havlng a metering chamber and an, inlet and an outlet therefor, a metering plate dividing said chamber between said seat facing on one side thereof and with s a port communicating both with said seat and with'said chamber on the other side'of said plate, and alcontinually rotating metering plunger having a tapered head fitting said seat and formed in its periphery witha 10a gitudinal groove adapted toregister with said port, said groove being flared toward said port.

so end and; open at all times to the atmosphere, v

inlet and outlet andfo'rmed with a tapered f In an: oil burninglapparatus the combination of acasing having a metering chamher and aninlet and an outlet, a metering plate dividing said chamber between said inlet and outlet andformedwitha tapered seat facing on one side thereof and with import a s communicatingboth with said seat and with said chamber on theother side of said late,-a.

continually rotating metering plunger aving' j a tapered headfitting saidseat and formed I v in :its periphery with a longitudinal groove adapted to register withsaid port, aspindle i i Z journalled in said casing land telescoping Withsai'd plunger,-means for-holding said spindle and said plunger against relative turning lmovement and yielding means between said spindle and said plunger for exertnameto this ing longitudinal thrust on the latter to the head against its seat.

In testimony whereof specification. ALFRED A.

press I have signed 7 v STUTZMAN;

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