Патент USA US2108872код для вставки
Feb. 22, 1938. c, E, swALLow 2,108,872 OIL BURNER Filed Jan. 13, 1956 - Fig.1. . % Z47 , . 5 "H3233 \nvenTor. Chu?es E. Swallow Patented Feb. 22,1938 Q 2,108,812“ UNITED. STATES PATENT‘ OFFICE 3.108.812 ommmm , Charles 3. Swallow. Wm, Mass. Application January 1:, 1m, Serial No. 5am ' : (?aims. This invention relates to oil burners and par-‘ ticularly to an oil burner designed for industrial low temperaturework. . My invention is embodied in an oil burner of the 5 type having a rotary nozzle, and one object of the invention is to provide an oil burner of this type which is highly e?lcient and in which the oil will'be thoroughly atomized and mixed with the air to provide the combustible mixture. In many burners having revolving nozzles a considerable vacuum is created at the end of the nozzle when the burner is in operation, and the presence of ‘such vacuum tends to retard the ?ame and also tends to counteract the atomization of 15 the oil and to cause more or'less oil to gather in 10 drops at the delivery end of the nozzle. Another object of my invention is to provide improvementsv in burners having revolving nozzles by which the creation of such a vacuum, at the end of the re 20 volving nozzle, and its deleterious eil'ects is elim inated. ' In carrying out my invention I employa housing having an air inlet and a nozzle portion present ing an air outlet, and I also employ a rotary 25 nozzle situated axially of the air outlet and form ing with the nozzle portion an annular passage for the discharge of air. The rotary nozzle is pro vided with a portion of progressively-decreasing diameter extending through and beyond the 30 nozzle portion of the housing and which gives the nozzle a streamline e?ect that prevents the rormation of a vacuum at the end of the rotary element. This rotary nozzle is rotated rapidly by the air passing through the housing‘ from the in let to the outlet and the parts are so constructed that the air delivered from the circular air de livery opening will be given a whirling movement in one direction, while the oil is delivered out wardly into the whirling air current with a 40 whirling motion which is opposite to that of the air. The impact of the whirling oil jets with the oppositely-whirling air results in a line atomiza tion of the oil and complete mixture _of the oil with the air, thus producing a highly?semcient 45 combustible mixture. In order to give an understanding of the inven tion I have illustrated in the drawing a selected embodiment thereof which will now be described after which the novel features will be pointed out 50 in the appended claims. In the drawing: Fig. 1 is a sectional view of a burner embody ing my invention. (c1. isa-m Fig. 3 is a fragmentary edge view of the rotor portion of the nomle; and . Fig. 4 is a atic view illustrating the manner in which the oil and air are mixed to produce the combustible mixture. ' 5 My improved burner comprises a housing mem ber I having an air inlet opening 2 and a nozzle portion 3 provided with an air discharge opening 4. The nozzle portion 3 is shown as formed in aseparate piece from the body of the housing I 10 and it is detachably secured thereto through suit able bolts 5. The rotary nozzle member is indi cated generally at 6 and it is provided with a body portion 1 which is rotatively mounted on a tubu lar extension 8 integral with the body of the 16 housing and projecting into the nozzle portion 3. Suitable ball bearings 9 are provided for ro tatively supporting the nozzle member ‘6, there being two separate ball bearings which are spaced by the sleeve III that is secured ‘to the tubular 20, extension 8 by means of a set screw II. The in ner end of the body 1 extends beyond the inner bearing 9 and a retaining ring I2 is secured'with in the inner end of the body ‘I by means or set screws l3. This retainer ring l2 prevents outward 25 longitudinal movement of the nozzle member. The nozzle member 6 has a portion M of pro gressively-decreasing diameter extending through and beyond the air discharge opening 4, the pro jecting end portion l5 of the nozzle being closed 30 and preferably being rounded as shown. The nozzle is formed with an interior oil chamber it into which oil is fed through a port I‘l extending axially of the tubular extension 8, the supply oi.’ oil from the oil inlet ll being controlled by the '35 usual needle valve l9. ' The oil chamber it of the nozzle communicates through openings 20 with an annular chamber 2| having an annular discharge opening or port 22 which is situated just beyond the end of the nozzle 40 portion 3 of the housing. A Provision is made for rapidly rotating the nozzle during the operation of the burner, for which purpose said nozzle is provided with a plurality of vanes 23 which are acted on by the air travel ing through the chamber 244st the housing from the inlet 2 to the discharge opening 4. The air delivered to the inlet 2 may be under relatively low pressure, but as the air passes through the vanes 23 it gives the nozzle a rapid rotation so that the oil delivered from the an nular discharge opening 22 will be thrown out wardly with a rapid whirling motion. The means Fig. 2 is a transverse sectional view of the nozzle 7 for rotating the nomle also results in giving the annular stream of air, which is delivered through 55 taken through the vanes 23. 2,108,878 " the annular discharge opening I, a whirling mo tion in ‘the opposite direction to that of the oil, the result being that the annular stream of oil which is whirling in one direction is thrown outwardly into an annular stream of air which is whirling in the opposite direction. The result of this is that the oil becomes very thoroughly atomized and mixed with the air, thus producing an extremely e?lcient combustible mixture. This opposite whirling motion of the air and 10 the o? results from the character of the vanes 23. The vanes are so constructed that-the two‘ ad jacent faces 25, 20 of any two adjacent vanes are parallel with each other, as shown in Hg. 2, and 15 are inclined relatively to the axis, as shown in Fig. 3. Because of this parallel arrangement the - space 21 between any two adjacent vanes 23 has the same width at the periphery of the vanes as at the base thereof so that as the moving cur-~ 20 rent of air strikes the faces II of the vanes. as shown by the arrows a in Pig. 3, there is no tendency for the air to ?ow off from the ends of the vanes but the full velil‘ect of the air pressure is transmitted to the vanes to give a rotary mo 25 tion to the nozzle in the direction of the arrows c. As the air passesout from the spaces 21 it is given a whirling motion in the direction of ' the arrows b and this whirling motion is in an opposite direction to that in which the nomle is By‘. this means the spray ofoii will be delivered outwardly from the annular space 22 into the annular sheet of air which is issuing from the air delivery opening 4 with'a whirling motion in a direction opposite to that of the 35 stream of air. This is shown diagrammatically 30 rotating. in Fig. t which may be considered as a view looking toward the nozzle from the right. In vanes causes the nozzle member to rotate and produces a whirling motion in the air passing through the annular air delivery passage, and means for delivering oil to said interior chamber, said nozzle member being provided with an an 5 nular oil chamber open at one end on the exterior thereof at a point Just beyond the nozzle portion of the housing, said nozzle member also being provided with communicating passages between said annular chamber and the interior chamber. 2. An oil burner comprising _a housing having an air inlet and a nozzle portion provided with a discharge opening, a rotary nozzle member sit uated axially of said discharge opening and forming with the wall thereof an annular air de 15 livery passage, said nozzle member having an interior chamber and a closed end projecting beyond the nozzle portion of the housing, vanes extending radially from the nozzle member with the adjacent faces of any two adjacent vanes 20 parallel to each other and inclined to the direc tion of air ?ow, whereby the impact of the air passing through the housing against the vanes causes the nozzle to rotate and produces a whirl ing motion in the air passing through the an‘ nular air delivery passage, and means to deliver oil to said interior chamber, said nozzle member having an annular oil chamber opening at one end on the exterior thereof and also having com municating passages between said annular 30 chamber and the interior chamber, the rotary motion of the nozzle member delivering the oil from‘the open end of the annular oil chamber outwardly into the whirling'stream of air and with a whirling motion opposite to that of the stream of‘air. » r ' 3. An oil burner comprising a housing having said Fig. 4 the circular row of arrows b indicates an air inlet and a nozzle portion provided with a discharge opening, a rotary nozzle member the direction of whirling motion of the air issu 40 ing from the annular port I, and the arrows 11 situated axially of said discharge opening and 40 indicate the whirling motion of the oil issuing forming with the wall thereof an annular air from the annular discharge opening 22. Because delivery passage, said nozzle member having an of the rotative movement of the nozzle the oil is interior chamber and a closed outer end which thrown outwardly in approximately a tangential projects through and beyond the nozzle portion 45 direction and will thus be directed against the of the housing, the portion of the nozzle member oppositely-whirling sheet of air illustrated by the which thus projects through and beyond the arrows b in mg. 4. housing having a progressively decreasing di The progressively-tapered shape of the por ameter in a; direction toward said closed end, tion 6 of the nozzle together with the fact that vanes extending radially from the nozzle mem 50 it projects beyond the nozzle portion I of the ber and having inclined faces whereby the im housing gives to the nozzle a streamline effect . pact of the air passing through the housing which permits the air and oil mixture to ?ow off against the vanes causes the nozzle to rotate from the end of the nozzle without creating any and produces a whirling motion of the air passing vacuum at said end, the presence of which has a through the annular air delivery passage, and 55 detrimental effect on the operation of the-burner. means to deliver oil to said interior chamber of 55 I claim: the nozzle member, said nozzle member having 1. An oil burner comprising a housing having on its exterior an annular discharge port and also an air inlet and a nozzle portion provided with. having passages which form a communication between said port and said interior chamber and a discharge opening, a rotary nozzle member sit through which oil ?ows from said chamber to uated axially of said discharge opening and form said discharge port, the rotary motion of the ing with the wall thereof an annular air de livery passage, said nozzle member having an I nozzle member delivering the oil from said an . interior chamber and a closed end projecting nular discharge port outwardly into the whirling beyond the nomle portion of the housing, vanes stream,- of air and with a whirling motion opposite to that of the stream of air. 65 extending radially from the nozzle member and having inclined faces whereby the impact of the airpassingthro'ughthe houslngagainstthe CHARLES E. SWALLOW.