US1608027A

US1608027A - Oil-burning device

Info

Publication number: US1608027A
Application number: US688295A
Authority: US
Inventors: Harry E Lake
Original assignee: LAKE OIL BURNING Co
Current assignee: LAKE OIL BURNING Co
Priority date: 1924-01-24
Filing date: 1924-01-24
Publication date: 1926-11-23
Anticipated expiration: 1943-11-23

Description

H. E.' LAKE OIL BURNINGA DEVICE Filed Jang 24, 1924 e sheets-sheet je H; E. LAKE 911; BURNING DEVICE 4p s sh'gs-sheet 's Patented Nov'. 23, 1926.'

UNITED lSTMES l, 1,608,027 PATENT OFFICE.

HARRY E. LAEE, or BOSTON, MASSACHUSETTS, ASSIGNOE To LAKE OIL EURNING. COMPANY, A CORPORATION or `:ilnssAcHUSETTS..

i' OIL-BURNING DEVICE.

Application :filed January 2 4, 1924. A Serial No. 688,295.

My invention relates' to that type of device particularly adapted for burning crude,`

or heavy oil Whereirnpa spinner'cup, so called, is'employedl tomconvert the HOW of oil into 'a thin lihn and project the film into a blast ofair or steam which will atomize the' Oil so that it may burn' freely. It has been the special object of my invention I to provide an improved form of spinnercup which shall more effectively assist in in Fig. 1 iviththe bracket, fan and oil distributing part-s shown in cross-section.

Fig. 3 shows inlongitudinal cross-section.

an enlarged view .of the spinner cup and oil nozzle,

Fig.4 is a cross-section on line"4,'4 of Fig. 3l

Fig. 5 s.

Fg.6 is a view. on Aline 6-6 of Fig. 2, viewed in the direction indicated by the y arrow. Fig. 7 is a view on line 7-7 of Fig. 2 viewed in the`direction with the bathe-plate partly cut away` to show the curved batheis a cross-section on line 5-5 of pins attached to the forward' face of the.

baille-plate.

Fig. 8 is a view on line 8-8 of' Fig, 2 4o viewed in the direction indicated by the arrow, With the diaphragm' partly cut away to show the fan blades. Fig. 9 is'a rear view of the fan casing'and bracket. l .I

Referring noW. more speciically to the drawings 1 iS a bracket provided with a forwardly extending base portion 2. The bracket 1 supports anv electricv motor 3, the shaft '4 ofwhich is `in twoI parts united by a iexible coupling 5.. An enlarged portion 6 of shaft 4 separates'the rear ball-bearing 7 andthe front ball-bearing 8, which bearings support the fan casing which is mounted on

hubs

9 and 10 in the following de- '55 scribed manner; projectingt'orwardly from the hub 9 is an imagen web 11 Saa-pea like the frustrurn of a cone and provided with air inlets 12. Integrally connected with the outer edge of the periphery of Web 11 'is -the rear portion 13 of the fan casing. The

hub 10 has integral therewith an annular spider 14 Fig. 6) provided with integral radial arms 15. This spider l14 is provided" With holes 16 through which may pass screws which securethe forward portion 17 of the fan casing. The peripheries ofthe

portions

13 and 17 of the fan casing are secured together by means of screws 18. An

Aouter nozzle casing l19`provid'ed With an an' nular lange 20 is also attached to the spider 14 by means of the same Screws which pass through holes 16. The bottom of' the fan casingis provideduvith a lug-21 Which may resi! upon theextension 2 of the bracket 1. A lug 22 is cast. integral with the rear portion 13 ofthe fan casing, and a screw 22.

passing through theopposite' portion of bracket 1 and entering -lug22, securely holds the fan, motor and burner to'the Abracket 1 in a manner whereby they may be readily removed.

An annular air-Shutter 24 overlies the slotted-web,11. This air. shutter 24 is provided With slots or openings which may 'be .brought into or out o'f egister With the slots 12 in the web 11 by revolving the air-shutter 24, one. end of Whichis loosely supported on the hub 9 and the otherend of which is provided. with an annular flange 25 which lits with iirni vfrictional contact in -a groove in the rear part 13 of the fanfcasing.

The' fan is mountedA and constructed as follows; fast upon "the enlarged portion 6 of shaft 4 is a hub 26 to which .is attached an alfinular-plate27 which. is fastened by means of rivets 28 to the fan-blades 29, (see Fig. 8). These fan blades 29 are formed integral with the back late 30, the outer edge of Whichruns with s ight clearance with reof the rear portion 13 of the fan casing.

The back plate 30 is provided with an annui lar ila-nge 32 which runs with slight clezirance with respect to a groove inthe back portion 13 of the fan. casing.

An annular baile-plate 33 of Asize corresponding to that of the plate 27 is secured to 'curved ribs .34 b y rivets 35. 34, which are cast integral with themgfront portion 17 of the fan casing, are radiallyA The ribs passes through the disposed and their-inner ends extend as far as the opening in the spider 14 (see Fig.

The nozzle and spinning cups for atomizing the oil are mounted 'and constructed in the following described manner.; the hub 10 (see Fig. 2) is provided with a cylindrical cavity 3G of depth greater than that required to. receive the roller bearing 8. Into this cavity 36 is closely fitted the annular flange 3T on the end of the hub extension 38 which is held in place by screws 10u. The'drive shaft 4 hub 'extension 38' and has fast on the end thereof a nozzle-cap 39 which has a rearwardly extending tube portion (See Fig. This rearwardly extending tube portion 40 is provided with a multiplicity of slots 41 which are slantingly disposed as illustrated in Fig. 5. This rearwardly extending tube portion preferably dares somewhat toward the nozzle-cap 39. Surrounding the shaft 4 is a sleeve 42 which tits tightly in the hub extension 38 at one end and at the other end enters loosely a cavity in the nozzle cap 89.

The hub extension 38 is provided with a cylindrical cavity 43 within which is mounted by a close driving tit a tube 44 which eX- tends forward for a'considerable distance. partly underlying the slots 41 in the tube portion 40` of the nozzle-cap 39. It. will be observed that an annular passage is formed between the sleeve 42 and the tube 44. An insulated oil supply pipe 45 is screwed into I a cavity in the hub-extension 38 and connects by passage 46 with the annular passage, between the sleeve 42 and the tube 44. This oil supply pipe' 45 passes through openings in the annular flange 4T on the spider 14 and the outer nozzle casing 19.

The tube portion 40 of the nozzle-cap 39 has a flange 48 tol which is attached the outer spinner cup 49. An inner spinner cup 50 is fast mounted at its inner extremity between the outer spinner cup and the tube portion 40 of the nozzle cap 39. It will be observed from an examination of Fig. 3 that b there isspace between the inner and outer Gti spinner cups and between the inner spinner cup and the tube portion 40 of the nozzlecap 39. It. will also be observed that the cups flare outwardly, the outer cup projecting slightly beyond the inner cup. The outer spinner cup 49 has near large openings or slots 51. A sleeve 52, pressed tightly upon the hub extension 38, loosely embraces the rear portion of the spinner cup 49. l

An annular casting 53 having a partially tapering bore7 as shown in Fig. 27 may be provided to be set in the brick work of the furnace front so as to form a suitable opening through which the nozzle of my device may be thrust to such extent as may be Adesired to allow sutlicient air to enter between the out-er nozzle casing 19 and the interior -ter 24 is adjusted so as its outer rim y of the casting 53 to give good combustion.

The operation of my device is as follows The motor is started, thereby rotating the fan, nozzle-cap and spinner cups, and oil is admitted through the pipe 45. The air shutto permit the desired, volume of air to enter the system. The fanblades 28 pass the air outward past their eX- tremities to the channel in the periphery of the fan' casing beyond the annular lip 3l. (See Fig. A2.) Thence the air passes between the bale-plate 33. and the front of the fan casing, being directed toward the passages into the outer nozzle casing, between the arms 15 of the web 14, by means ofthe curved ribs 34. These curved ribs 34 are designed to present a minimum of frictional resistance to the whirling body of air passing betweenl them toward the center of the system by This has the incidental advantage. of reducing the objectionable noise of frictional resistance to air currents as well as minimizing resistance to the flow of the current of air.

It will be noted from an examination of Fig. 2 that the space between the fan blades 29 tapers in the cross-section therein shown because of the slantino' relation of the plate 30 to the plate 27. Ience as the space between the fan blades 29 widens toward the periphery in one plane, because of the radius disposition of the fan blades, this space fis, narrowed in the opposite plane in a manner,

whereby the passage between each pair of fan blades maintains a cross-sectional area which 1s at all points substantially equal.

This uniformity results in a well balanced,

even flow of air which assists in qui-et and efficient operation of the fan.

gradually altering the course of the air 1 currents.

As the rear portion of the fan is sealed on scribed manner; a"ter entering the annular passage 43 between the sleeve 42 and the tube 44, the oil flows forward into contact with the tubular extension 40 on the nozzle-cap 39. As the oil passes through the slots 41 in thetubular extensions 40 the rapid rotation of this part throws the oil outward with great force against the adjacent surface of the inner spinner cup 50. The oil is thus spread in a thin film on the inside of the spinner cup 50 and the rapid rotation of this spinner cup causes the oil to flow outward by centrifugal force along the liaring surface of the cup. Upon reaching the outer rim of this inner cup 50, the film of oil is projected toward the overlying rim of the combustion.

vlilining over had taken place therein.l

outer spinner cup lll-and encountersa blastA -of the rini of the inner cup 50.` A portion of the oil, however, whichi's thrown ott the riin ot the innercup 50 will encounter the A rotatingriin of the outer spinner cup 49 and will bythe centrifugal force imparted by that rim be thrown outwardly across the partot'the blast of air issuing from between thatv'rini of the outer cup 49 andtheouter nozzle'l casing 19. This blast of aii will coniplete the atoinization of all oil which is tliro'wn into the outer air to the point of Heretofore much difficulty has been experienced in getting the oil to spread ou't'in a film upoiithe spinner cup after an initilal ie drops of oil subsequently falling .on the oil lilin tended to retain their globular shape and roll? outof the cup without' becoming atoinized. This lwould result in imperfect combustion. My device,A however, throws ence .of the air blast and catching the unatoinized portion on theriin of the outer cup and again subjecting it to the air blast,- I

further assure complete breaking up of the oil into line particles which will burn completely with a hot smokeless flame.

I have stated that my device is particularly designed for use with heavy oils. It may nevertheless be used, with excellent results,

' liumidiy the atomizer.

' y with lighter oils, such as kerosene. My device is also useful with water instead-of oil in situations where it is desired to atomize water for humidifying purposes in' order to Having thus fully described my invention, what Iclairnis:

1. In a'device of the characterspecitied the combination of a shaft, a casing provided with spaced bearings for rotatably Supporting the shaft, a spider at one side of said casing having a hubl provided with a cavity lto receive one of -said bearings, au extension upon said hub having a tube receiving cavity, a tube mounted in the cavity about the rotating shaft and rigidly secured to the extension, a'sleeve secured in the cavity about .saidv .tube to form an oil` passage between the tube and sleeve, an oil .inlet for delivering oil to the passage thru a Wall of sdsleeve, Ia nozzle-cap' secured to said shaft to, be rotated, and having a tubu- 1 lar portion tliat'surrounds and extends rear,-

wardly a substantial distance over said sleeve, said rearwardly extending portion being provided ,with elongated slots, and a spinner-cup mounted onsaid rearwardly extending 'portion and surrounding the nozzlecap.

2. In .a device of the' character specied the combination of a fan casing, a shu'ftlp Aa spider at the opposite sideof said casing.

an extension secured to the hub ofithe spider and haviiiga tube receiving cavity, a tube mounted in the cavity about the shaft and rigidly 'secured to the extension, a sleeve secured in the cavity, about said tube to forni an'oil passage between the tube and sleeve,l

an oilinlet for delivering oil to the passage thru a wall of said sleeve, a nozzle-cap secured to said sliaftftopbe rotated thereby .and

having a tubular portion that surrounds and extendsjrearwardly a substantial dist-ance over said sleeve, slots formed in said rearwardly extending tubular portion, and a spinner-cup mounted on said rearwardly extending portion and suri'oundii'ig'z'the nozzle- Cap;

3. In a device of the character speciiied the combination of a shaft, a stationary member Within which said shaft is rotatably `mounted, said stationary member being provided With a tube receiving cavity, a sleeve closely surrounding said shaft land passing through said cavity which sleeve is fixed to said'stationary -member, a tube mounted Within said cavity in a manner whereby thereis formed an 'annular oil passage between sald sleeve and said tube, an oil inlet entering the passage through .a wall of said tube, a nozzle-ca fast mounted on the rextre ity on said .s aft said nozzle-cap having ya tu ular extension overlying said sleeve and said tube and ,forming an extension of :sai-d passage over the tube,.said tubular extension being provided with slots .formed ed on Athe extension'of the nozzle cap and surrounding the nozzle cap said spinner cup Vthrough its walls, and a spinner cup mountrevolving with said shaft, being of substan'- tially frusto-conical forni, enlarging toward its outer end and the inner sui-face thereof being supplied with oil through the slots of the said tubular extension of the nozzle cap. LA burner of the class described,'com

prising a. nozzle cap arranged and mounted.125

for rotation and provided with peripheral openings, means to supply oil to the interiorv of the nozzle cap todae thrown out centrifugally by the rotation of said nozzle cap, an inner spinner cup surrounding said nozzle `cap and the interior surface of which is supplied with oil thereby, anouter spinner cup spaced from the inner spinner cup to fornian annular passage therebetween, said outerI spinner cup having peripheral openings and said spinner cups being arranged to rotate with said shaft, a fan, and an outwardly contracting outer nozzle through which a blast of air is forced by the fan, said outer nozzle surrounding said outer spinner cup and spaced therefrom so that an outwardly contracting annular passage is for-med therebetween through which and through said openings of the outerspinner cup the blast Aof airis forced and discharged between the outer ends of the innerand outer spinner A burner of the'class described, co1nprising a nozzle cap arrangedvaid mounted for rotation and provided with peripheral openings, means to supply'oil to the interior of the nozzle cap t0 be' thrown out centrifugally by the rotation of said nozzle cap, an inner spinner cup surrounding said nozzle'cap and the interior surface of which is supplied with oil thereby, an outer spinner cup spaced from the inner spinner cup to form an annular passage therebetween, said outer spinner cup having peripheral openings and said spinner cups being arranged to rotate with said shaft, a, fan, and an outwardly contracting outer nozzle through which a blast of air is forced by the fan, saidouter nozzle surrounding said outer spinner cup and spaced therefrom so that an outwardly contracting annular passage is formed therebetween through which and through saidA openings of the outer spinner cup the blast of airis forced and discharged between the outer ends of the inner and outer spinner y cup, the length ofl said outer spinner cup exceeding that of the inner spinner cup and its outer end projecting beyond that of the inner spinner cup, the outer end of the outer nozzle being arranged in close prox irnity to that of the outer spinner cup.

-6.'A burner of the class described, coniprising a nozzle cap arranged and mounted for rotation and provided with peripheral openings, means to sup ly oil to the interior of the nozzle cap to e thrown-out centrifugally by the rotation of said nozzle cap, an inner spinner cup surrounding said nozzle cap and the interior surface of which is supplied withr oil thereby, an outer spinner cup spaced from the inner spinner cup to. forni an annular passage therebetween, said outer spinner cup having peripheral openings a-nd said spinner cups being arranged to rotate with said shaft, a fan, and an outwardly contracting outer nozzle throughwhich a blast of air is forced by the fan,

`said outer nozzle surroundingsaid outer spinner cup and spaced therefrom so that un outwardly contracting annular passage is formed therebetween through which and through said openings of the outer spinner cup the blast of air is forced and discharged between the outer ends of the inner and outer spinner-cup, the length ofsaid outer spinner cup exceeding that of theinner spinner cup and its outer end projecting beyond that of the inner spinner cup,' the outer end of the outer nozzle being 4arranged in close proximity to that of the outer spinner cup, the extreme outer end of the outer spinner cup being outwardly flared.

In witness whereof I have hereunto af` fixed my signature. I'

. HARRY E. LAKE.