Патент USA US2409478код для вставки
Oct. 15, 1946. 2,409,477 W. H. DE LANCEY FLUID SUPPLY APPARATUS FOR BURNERS Original Filed Sept‘. 16, 1944 -5 Sheets-Sheet l Q\\%maQ INVENTORV .?EZAI/CEY ' ql- W146 ATTORNEYS Oct. 15,, v1946. I ' H, DE LANCEY 2,409,477 FLUID SUPPLY APPARATUS FOR BURNERS Original Filed Sept. 16, 1944 5 Sheets-Sheet 2 ‘ ATTORNEYS 0a. 15, 1946. I H. DE LANCEY ‘ 2,409,477 FLUID SUPPLY APPARATUS FOR BURNERS vOriginal Filed Sept. 16. 1944 5 Sheets-Sheet 3 ' ATTORNEYS _ Cd; 15, 1946- w. H. DE LANCEY ‘ ~ 2,409,477 FLUID SUPPLY APPARATUS FORv BURNERS Original Filed Sept. 16, 1944 5 Sheets-Sheet 4 INVENTOR A/P/PtW/ZJEZANCEV BY . 9‘- 7J4! ATTORNEYS Oct. 15,1946. 2,409,477 w. H. DE LANC'EY ‘ FLUID SUPPLY APPARATUS FOR BURNERS Original Filed Sept. 16, 1944 5 Sheets-Sheet 5 INVENTOR Mmzw/Z?zlnwzr BY (2.30;! qc 7/144 ATTORNEYS Patented Oct. 15, 1946 I . 2,409,477 UNITED STATES PATENT OFFICE 2,409,477 FLUID SUPPLY APPARATUS FOR BURNERS Warren H. De Lancey, Spring?eld, Mass, assign or to Gilbert & Barker Manufacturing Com pany, West Spring?eld, Mass, a corporation of Massachusetts Original application September 16, 1944, Serial No. 554,367. Divided and this- application August 30, 1945, Serial No. 613,683 3 Claims. . (Cl. 103—6) 2 1 This invention relates to improvements in ap paratus for supplying ?uids, such as air and oil, view of the oil pump shown in Fig. l but drawn to a larger scale; to an oil burner, such for example as an air-atom izing burner to which both primary and second ary air must be supplied as well as fuel. This application is a division of my application Serial No. 554,367, ?led September 16, 1944. The invention, while capable of other applica tions, is primarily designed to supply small-size ‘ Fig. 6 is an enlarged cross sectional view‘ taken on the line E——-6 of Fig. 5; ' Fig. 7 is an enlarged fragmentary end view taken from the right hand of Fig. 5;‘. ‘ Figs. 8 and 9 are fragmentary sectional views taken on the lines 8—8 and 9-4}, ‘respectively, of Fi . 4; .. burners’, such for example as those used with hot 1O lgi‘ig. 10 is a fragmentary sectional view taken water heaters, where oil is consumed at very low on the line Hl—l? of Fig. 2; ‘ . rates, say from one-twentieth to three-quarters Fig. 11 is a small scale elevational View, show of a gallon perhour. Oil at such low rates can ing in more or less conventional form, the air and not be handled properly by the so-called pressure oil supply apparatus mounted on an oil burner; atomizer usually used in gun type burners and it is necessary to resort to the so-called air-atomiz ing nozzle. This invention provides the means for supplying the air for such nozzle at regulated Fig. 12 is a much enlarged sectional elevational view of the atomizing nozzle of the burner;-and Fig. 13 is a much enlarged cross sectional view taken on the line I3-‘-!3 of Fig. 12. - _ pressure and also for supplying the oil at any Referring to these drawings‘ ‘and ?rst to Fig. 1 selected rate; over atr'ange, such ‘as that above set 20 thereof, the apparatus includes a positively-act forth,‘ with an arrangement whereby the ‘oil ing displacement pump l for supplying‘primary pumping rate may be readily and conveniently air to the burner, a variable-capacity positively varied while the oil pump is in operation. acting displacement pump 2 for supplying oil to ‘The invention has for one object the provision the burner anda fan 3 for supplying secondary of an oil-supplying means, together with a cut air to the burner. Both pumps l and 2 and the off valve; an air pump of the positive displace fan 3 are driven by an electric motor, of which the mentltype, having a by-pass and a valve con stator laminations are indicated at 4, the stator trolling the same; and means actuated by pres winding at 5, the rotor laminations at 6, the rotor sure of the pumped air for opening the oil Valve spindle at "I, as ?xed to laminations 6, and the when the pumped air reaches a predetermined 30 rotor shaft at 8 as ?xed to the spindle 'l. The pressure and subsequently opening the by-pass motor has a cylindrical casing 9 to which. are valve when said pressure is exceeded. suitably ?xed, as by the bolts In (Figs. 1 and 2), The invention has for another object the pro inner and outer end plates H and I2, respectively. vision in a single unit of an air. pump, an oil pump The inner end plate I l is secured, as by cap screws with means for ‘varying its capacity, an air I3, to the‘ fan housing M of the oil burner. The pressure-control valve, and an oil cut-o? valve end plate H rotatably supports in any suitable actuated'by the air-pressure-control valve. The invention has for another object to pro vide an electrically driven apparatus of the class ‘described, mounted in the casing of the driving motor and including a fan for supplying primary air to the burner as well as positive displacement pumps, one for supplying the secondary air and one for supplying oil to the burner, together with the necessary control valves and accessories for said pumps. The invention will be disclosed with reference to the accompanying drawings, in which-— ' Fig. 1 is a sectional elevational view of the com plete apparatus for supplying air and oil to an oil , burner; . Figs. 2, 3 and 4 are cross sectional views taken on the lines 2-4, 3-.—3 and 4—4, respectively, of way the motor shaft‘ 8 and on one end of the latter the fan 3 is ?xed, as indicated. The end member 12 serves to support both pumps I and ,2, the air ?lter, the air-pump by pass valve, the oil valve and all the necessary passages and conduits whichare‘ associated with these elements. The member l2 has a sleeve bearing l5, located coaxially thereof and rotat ably supporting the inner end l6 of the air pump driving shaft IT. The shaft end I6 extends through member l2 and has its inner end suitably coupled to‘the motor shaft. ‘ As indicated herein, the coupling is of the speed-responsive type, having a drum [8 ?xed to > shaft end It; and a pair of ‘weight segments [9, each pivoted on a stud 2i), ?xed to a ?ange of spindle l. The weights are drawn inwardly by springs 2| and held thereby‘out of contact with ' (1' a; : Fig.‘ 5 is a ‘fragmentary sectional elevational 55 the inner periphery'o-f drum l8. ‘When-the motor Fish 2,409,477 4. 3 attains a predetermined speed, the segments i9 will be thrown outwardly by centrifugal force to engage the inner periphery of drum l8 and drive the same and shaft ll. The speed-responsive coupling has been indicated merely in conven tional form herein. It may be of any suitable and Well known form. One suitable form is shown in my Patent No. 2,364,132, granted December 5, 1944. which both of the passages M and 42 are con stantly in communication. The piston 45 is movable to the left (as viewed in Fig. 1) when the air pump has built up su?i cient pressure to properly atomize the oil. This piston operates an air by-pass valve and an oil inlet valve as will later be described in detail. The end member l2 has a circular ?ange 49, grooved to receive a packing ring 50 of rubber or The air pump is best shown in Figs. 1 and 3. A 10 the like. deep cylindrical recess is formed in the outer face of end member I‘! to receive a sleeve 22 which forms the liner for the pump chamber and Which is cylindrical but located eccentrically of the A cup-shaped, pressed-metal cover 5! has its inner end partially telescoping flange 59 and its inner periphery engaged by ring 59 to close liquid-tight the joint between the cover and mem ber E2. The cover is fastened in a manner later 15 to be described. This member and the cover have pump shaft IT. The outer end of the pump cham ?anges 52 and 53, respectively, to support a filter ber is closed by a member 23 secured to member screen M, which encompasses the oil pump 2. The !2 by a plurality of cap screws 24. This member end member 12 (Fig. 8) has a tapped hole 55 23 has a sleeve bearing 25 for the outer end 26 adapted for pipe connection to an oil supply tank. of shaft H. The pump rotor 21 is cylindrical with a circular series of angularly-spaced and longi 20 This tapped hole is connected by a passage 56 to the annular space 51 between the cover 5| and tudinallyedisposed slots 28 in its periphery to re screen '54. Within the screen lies the oil pump ceive one in each, blades 29, which are radially surrounded by an oil chamber 58. slidable in the slots and the outer edges of which The oil pump has a valve-controlled inlet pas engage the inner peripheral wall of member 22. sage best shown in Fig. l. A radial passage 59 The ends of the blades and the ends of the rotor leads from the lower part of chamber 58 radially engage the end walls of the pump chamber. The upward into the inner end of a cylindrical recess end faces of the rotor 2"! have cylindrical recesses 35.1 formed in the oil-pump-housing member 23, 21’, one in each, to receive rings 38. The ends above described. Threaded into and closing the of each blade 29 rest on the outer peripheral sur faces of these rings and are thereby held with .30 outer end of this recess is a hollow bushing Bl, having a central oil inlet opening 62. The latter the outer edge of each in contact with the inner communicates with one end of a radial groove 63 peripheral surface of member 22. Inlet and out formed in the inner face of an end plate 64, which let ports 3i and 32, respectively, are formed as is secured with member 23 to member 12 by the arcuate grooves in the inner end wall of the pump cap screws 21!, above described. The other end chamber formed by member l2, Air enters the of groove 63 communicates with a slanting pas spaces between pairs of successive blades from sage ‘65 in member 23 leading to the pump inlet port 3| and is carried in a counterclockwise direc port'66. . tion as viewed in Fig. 3 and discharged into the A needle valve '61 controls the oil passage 62. port 32. This particular pump construction is one which is old and well known in the art. Further 40 A spring 58, coiled around the stem of this valve, acts between bushing 6! and a snap ring 69, description of it is therefore deemed unnecessary. mounted in a groove in the stem, tending to open The particular form of pump illustrated is not the valve. The latter is initially held closed essential to the invention and is given merely by against the force of spring 68 by the described way-of illustrative example of one of many types piston 45. Formed in the inner end face of of displacement pumps suitable for the purpose. housing member 23 is a tapped hole 10. Set into Air is admitted to port 31 by means of a pas this hole is a bellows ‘H, the ?ange of which is sage 33 in end member l2. This passage connects clamped to the base of hole 10 by an annular with one end of a cylindrical recess 35 formed in . nut 12. The stem of valve 61 extends into the the inner face of member 42. Closely ?tted into interior of bellows H and engages the closed this chamber is a suitable ?lter, herein shown as end wall of the same. Leakage of oil around the This a; felt?lter 35 mounted is held inbetween place by'two a snap wire ring screens 3?, en stem of valve 61 is prevented by the bellows. Formed in the member [2 coaxially of valve 61 gaged in a groove in the peripheral wall of recess and communicating with chamber ‘IE1 is a pas 34, or in any other suitable way. Air reaches the ?lter from the air inlet 38 of the fan housing » sage ts and a slightly smaller passage ‘M. The described piston 45 has a stem portion 15 which l4, through holes, such as 38, in end member if is of large diameter and hollow to receive the and some of the unused slots, such as 40, in the piston spring 46 and a smaller portion ‘I6 which stator laminations, as will be clear from Fig. l. bears on the end wall of bellows ‘H and holds the The air pump outlet port 32 is connected by a oil valve closed. As soon as the air pump has passage 4| (Fig. 10) to the inner end of a cylin built up sufficient pressure, the piston 45 will be der 42 which is formed in the inner face of end moved by the pressure of the pumped air, mov member 12 as best shown in Fig. 1. Also con ing stern 15-46 to the left as viewed in Fig. 1 nected with the innerend of cylinder 4&2 is a pas and allowing oil valve 61 to open. When the sage 43 (Fig. 2) which connects with a tapped ‘hole 44, adapted to be connected to the air inlet 65 piston has been moved to the left as far as possi ble, the end of stem portion 16 will have drawn of the air-atomizing nozzle of the oil burner. away from the end of bellows ‘l |. Movement of Slidably mounted in cylinder 42 is a piston Q5, the oil valve and the bellows is limited by the yieldingly held in the illustrated and extreme abutment of snap ring 69 with the inner end of inner position by means of a spring at. This spring has a seat-in the center of a cross bar 47!‘ 70 chamber ‘in. The piston .45 can move a greater distance (until it abuts cross bar 4'!) as will be which diametrically spans ‘the .outer end of cylin clear from ‘Fig. 1. der t2 and issecured at its ends, as by screws £8, The byepass for the air pump consists ‘of the to member E2. The spring 65, acting bet-ween ‘passage '34 at all times in communication With bar 41 and piston iliholds the piston ‘in ‘the ex" treme'inner position shown leaving a space with 175 the ,. cylinder 42 and thus with the pressure side ‘2,409,477 of the air pump; a diametricalhole 11 in the portion 10 of the stem of piston 45; an axial hole 18 in the portion ‘Hi ; the passage 13; the chamber 70 ‘and a groove ‘I9 in the inner end face of member 23, which groove opens into the chamber of the air pump. The stem portion 16 acts as a . ‘The described adjusting‘ stem 88 of the oil pump is rotatably mounted in a centrally‘ dis posed hub ‘I00 on. the end plate 64 of the oil pump 2. The outer end of this hub is threaded to receive a flanged annular nut IOI which serves to hold the described cover it in place. The cover has an interior hollow hub I02 which valve to control thisb-y-pass, its end face when encompasses the hub I00 and which is drawn engaged with the bellows,jclosing hole 18. ‘A tightly against the outer end face of end plate 64 suitable seal I00, pressed into the hole 13 and seated against the shoulder formed at the inter 10 by nut IOI to avoid ‘leakage from chamber 58. The inner portion of hub I00 has an annular section of holes ‘I3 and", slidably receives stem groove to receive a packing ring I03 of rubber portion 16 and prevents communication between or the like to still further prevent leakage from holes 1.3 and 14 except by way of holes 11 and 18. the chamber. The hub I00 has an internal ‘It will .be clear that when the pump has built up groove to receive a smaller packing ring I04 of suflicient air pressure, the by-pass will open and rubber or the like which tightly engages stem enable excess air to merely circulate idly through 89 to prevent leakage of oil along the‘stem. the ‘pump. The air pump has a capacity in ex This stem 88 is held against axial displacement cess of its requirements. _ That is, the one pump by the handle 90 engaging the outer end ‘face of must have a capacity large enough to ;supply burners of widely varying sizes and thus a by-pass 20 hub I09 and by a snap ring I05, mounted in a groove in stem‘ 80, engaging the inner end face is necessary to take care of air not needed for the of the hub. The described stop pin 93 is ?xed in burner. the ‘outer end of‘ hub I00. . I The oil pump includes a cup-shaped rotor 8|, The nut‘ IOI in ‘its inner end has a circum the end wall of which is ?xed to the portion 26 ferential groove in which is ?xed a snap ring of the pump drive shaft. This rotor is mounted I06. The purpose of this ring is to enable‘the in and coaxially of a cylindrical chamber formed cover‘ 5!, which sticks tightly in place because of , in housing member 23 and closed by end plate 64. the packing rings 50 and I03, to be positively A hole extends diametrically through the annular pulled ‘off when nut ml is unscrewed, the snap wall of the rotor, forming two cylinders 82. A ring abutting the shoulder I01 on the cover for single rod 83 extends diametrically of the rotor this purpose. ‘This avoids the necessity‘for the and is slidably engaged as a piston in each cyl inder 82. Fixed to the rod 83 at a location cen use of prying tools, such as screw drivers or chisels, and the possible damage incident to their Vtrally between its ends isa cylindrical member 34 which lies within the open, cup-like end of In the use of the‘invention‘ in connection with the rotor and may, by adjustment, be positioned 55 an oil burner of the airi-atomizing type,-the fan 13 eccentrically or coaxially of the rotor. In the use. outer end face of the member 84 is adiametrical slot 85 which slidably receives a square block 86. Engaged in this block is a round pin 81 which is ‘fixed eccentrically of and‘ on the inner end. of a stem 88. In Fig. 6, _89 indicates the axis of rota tion of stem 98. Byturning the stem counter clockwise as viewed in Figs. 6 and 7 by means of the handle 90 provided on the stem, the ‘axis of pin 81 may be moved from its position of maxi mum eccentricity shown in Fig. 6 until its axis 9! coincides with the axis 92 of the pump 'rctor 9!. Thus, the capacity of the pump may be varied from a maximum to zero by increments as small as desired. A stop pin 93 (Fig. ‘7) limits the movement of handle 90 by abutment with shoulders 94 on the handle to the limits described. As the rotor 8| rotates counterclock wise as viewed in Fig. 6, the‘outer end of one of the cylinders 82 (the upper one) will com- ' municate with the pump inlet port 66. This is an arcuate groove which is formed in‘member 23 iii-encompassing relation with the pump rotor 0 I1. _ I supplies air from its housing I4 into one end? ‘of a-tube I08 (Fig. 11), in the outlet of which is arranged‘ a body I09, carrying the‘ ‘nozzle ‘ H0. The air and oil discharge ports 44 and 99 of the supply unit are respectively connected by‘ pipes III and H2 to passages‘lldand II4 (Fig. 12>;in the body I09. ‘ Fastened'to the forward end of the body‘ I09 as by a cap IIEi,_screwed on to the body, is a nozzle body I I6, having a frusto-conical outer end and a member II'I, having a comple mentary shaped part to engage said end and hav ing the nozzle ori?ce H0. The nozzle body H6 has a central oil discharge passage I I8 communi cating directly with passage H4. Formed be— tween the abutting end of the bodies I08 and H6 is an‘ annular passage H9, receiving air from ‘passage I I3 and discharging it through two longi tudinal passages I20 in body H0. The passages Hi5 connect one with each of two slots I2I (Fig. 13), the ‘inner ends of which open tangentially into a whirl chamber I22, formed between the mating frusto-co-nical parts H6 and Ill (Fig. 12) and surrounding the’ frusto-conical end of out from its piston, creating a partial vacuum 60 the oil nozzle. Air entering through slots I2! ‘is whirled around in chamber‘ I22 and issues‘ from to draw in oil and fill the cylinder. Meanwhile, nozzle I20‘in a whirling stream, surrounding the the other cylinder which had previously been oil stream. ‘ ?lled, is brought into communication with the ‘In operationon a call'for heat from the burner, outlet port 95, which is formed similarly to port the electric motor is started in any suitableway, 66 but on the opposite side of the rotor. As the usually automatically in response to a thermo rotor turns, the lower cylinder moves‘ in on its stat. The fan 3 is driven with the motor and is piston to force out the oil into the outlet port 95. ?rst brought well up towards its maximum speed The outlet port 95 is connected by a radial pas As the rotor turns the upper‘ cylinder 82 draws sage 96 (Fig. 9) to one end of a passage 91 which extends longitudinally through member 23 and a substantial distance into end plate I2 where it connects with a radial passage 98, lead ing to a tapped hole 99 in plate I2. This hole 99 before the speed-responsive coupling operates to connect the pump and motor shafts IT and B and drive the oil and air pumps 2 and I, respectively. This allows time for the scavenging of the air tube I08, the combustion chamber to which it delivers, and the several passes and flues of the heating is adapted to receive the oil pipe leading to the 75 apparatus. Secondary air, at a su?lcient rate nozzle of the oil burner. 72,409,477 7 to secure good ‘combustion, :is available at the --burne.1- nozzle before the pumps I and 2 are started. Even then actuation of the oil pump "2 is>inelfective until the air-pump I has ?rst built up the necessary pressure to insure a supply of 8 and two control valves and the rate-varying means for the oil pump. Iclaim: 1. Apparatus for supplying air and oil to a :burner, comprising, a positively-acting displace ment pump for supplying air, inlet and discharge conduits for said pump including in the dis primary air at the necessary rate to the atomizing inozzle. Then, the .oil valve 5? opens to allow ?ow ‘ofioil to the nozzle. On stopping of the burner, charge conduit, a chamber, a wall in said cham the electric motor is deenergized and, after its ber movable by ‘pressure of the pumped air, a speed diminishes to a certain point, the speed 10 pump vfor supplying oil, a cut-oil? valve prevent :responsive coupling disconnects pumps I and 2, ing ?ow of oil to the oil pump, a by-pass from ‘whereby the .oil '?owwill be quickly cut o?" by the the pressure to the suction side .of the air pump, "drop in "pressure of the primary air. The flow of a valve controlling said by-pass, and means .oil'tozthe tburner nozzle is thus stopped ahead of actuated ‘by said movable Wall for opening said ‘the '?owzof primary air to avoid poor combustion. cut-01f valve when a predetermined air pressure 'The fan ‘3 continues in operation after both has been built up in said chamber and for sub pumps 1 .and 2 have stopped in order to scavenge sequently opening the by-pass valve when the the burner. pressure in said chamber exceeds said prede lt'will he noted that thesize of the air passages termined pressure. in the atomizing nozzle ‘will determine the rate 20 '2. Apparatus for supplying air and oil to a of air flow ‘when the predetermined pressure of burner, comprising, a positively— cting displace :air has ‘been established by the pump I. Then, ment pump for supplying air, inlet and dis and only then will now of oil to the burner be charge conduits for said pump including in the permitted. The oil rate ‘is conveniently regulable, discharge :conduit, a chamber, a Wall in said even while the pump is 1in operation, by means '. chamber movable by pressure of the pumped air, 1.0.1’ "the ,mem-ber‘SG. The latter is located outside a variable-capacity positively-acting displace "the ‘casing 51 which encloses 'all the rest of the .ment pump forsupplying oil, ‘inlet and discharge apparatus and ‘may be turned by as small incre conduits for the oil pump, a cut-01f valve asso ments as may be desired to 'Vary the capacity of ciated with one of the oil conduits, a by-pass 'the‘oil pump from zero to the selected maximum. from .the pressure to the suction side of the air The ginventionprovides a compact arrangement pump, a vvalve controlling said by-pass, and of parts enabling both pumps together with the means actuated ‘by said movable wall for open ‘necessary valves, a screen, a ?lter, controls and ing said cut-off valve when a predetermined air conduits to be provided on the end plate of the pressure has been built up in said chamber and driving motor within a casing, forming an oil for subsequently opening the by-pass valve when supply chamber. ‘The arrangement'of the cham the pressure in said chamber exceeds said pre bers 34 and 42, either or both, in one side of the determined pressure. end plate or body member l2 and the air-pump 3. In apparatus of the class described, a body chamber in the other side of the member is member having in one end a cylindrical air thought to be important. The ?lter and air pres pump chamber and in the other end a coaxial sure chambers 34 and 42 are arranged on oppo bearing, said body member including a part for site sides of the bearing I5 and in closely adjacent closing said chamber and having therein a cylin relation therewith. These chambers 34 and 42 drical oil-pump chamber, a pump rotor in each have end walls which each overlap in part the air said chamber, a shaft mounted in said bearing pump chamber and the passages 33 and 4| are ‘P’ and driving both rotors, said member having provided through the overlapping portions of the between the second end and the air-pump cham adjacent end walls of the chambers. The ?lter ber a cylindrical pressure chamber having an and pressure chambers lie between the same two end wall vin parallel partially-overlapping and in transverse planes. One of these planes coincides closely adjacent relation with the adjacent wall with a plane in which one end of bearing I5 is of the air-pump chamber, a movable wall in the located and the other of which ‘lies ‘between the pressure chamber, said member having a con two planes in which the ends of bearing l5 are duit interconnecting the overlapping portions of located. The inlet and outlet passages 3| and 1H said adjacent end walls, an outlet from the of the air pump may thus be made very short and pressure chamber and a by-pass extending from straight. The by-pass for the air pump is also in Ll the pressure chamber along and closely adjacent made as short as possible by extending it along, the peripheral wall-of :the air-‘pump chamber and and closely adjacent, the periphery of the air entering the latter ‘through its other end wall, pump I from the pressure chamber 42 to the more an oil conduit connected with the oil-pump remote end wall of the air pump. Also, both the chamber, a valve in the oil conduit, and a valve air by-pa-ss valve 78 and oil cut-off valve :67 are in said by-pass, 'both said valves located coaxi» located in coaxial relation with the movable wall ally of said pressure chamber and connected to or piston 45 of the pressure control device. said movable wall to be actuated thereby. Radially, all parts are kept within reasonably small limits in view of the provision of two pumps WARREN H. DE LANCEY.