US1591976A - Oil burner - Google Patents

Description

July 13 1926. 1,5@1,9?fi

A. P. HOLDEN ET AL OIL BURNER Filed Jude 29, 1925 4 Sheets-Sheet 1 ifivemfam.

I 9. W Ian? Filly 13 1926.

v A. P. HOLDEN ET AL 0 I L BURNER 4 sheets-sheet 2 Filed June 29, 1925 Jilly 13 1926.

A. P. HOLDEN ET AL 01].- BURNER Filed June 29, 1925 4 Sheets-Sheet 5 July 13 1926. 1,591,976

A. P. HOLDEN ET AL- OIL BURNER 10 Filed June 29, 1925 4 Sheets-$heet 4 d 45 I Invenwfis. I

47 mm Q arizw;

GNTARZD, CANADA.

01L BURNER.

Application filed June 29, 5.925. Serial No. 40,341'.

. The principal obiects of the invention are, to enable the burning of fuel oil with econ om} safety and high eiliciency, and to devise an apparatus which is easy to control and will operate indefinitely Without attention.

The principal features of the invention consist in the novel construction and urrangre ncnt of mechanisms, whereby the flow of oil to the burner is automatically con trolled end a constant pressure of air at the atomizer nozzle is maintained.

i -{further important feature consists in the novel manner of lubricating the air pump and of separating the lubrication oil from the air, and a still further feature of the invention consists in the compact construction and arrangement of the various control elements into a unit.

ln the drawings, Figure 1 is an elevationcl view of the complete apparatus as installed in connection with a furnace, at portion of the supporting trey being broken away.

Figure 2 is a plan view of the machine showing the furnace connection arranged in right angular relation to that shown in Figure 1.

Figure 3 is an enlarged mid-sectional view through the air pump and oil pump drive, taken on the line 3-3 of Figure 2.

Figure 4 is a mid scctionel view through the air pump on the line 6iof Figure 3.

Figure 5 is an enlarged vertical sectional view taken on the line 5-5 of Figure 2.

Figure 6 is an enlarged vertical sectional view on the line 6-6 of Figure 5.

Figure 7 is a horizontal sectional view through the line 77 of Figure 6.

Figure Y is z" enlarged vertical sectional view through the oil inlet control valve.

Figure 9 is an enlarged vertical sectional view through the oil pump casing and dis tributor valve casing on the line 99 of Figure 2.

Figure 10 is e verticsl'section through the distributor valve on the line 10--10 of Figure 9.

In the practice of burning fuel oil in storm izing furnaces, it is desirable that the apparatus for feeding the oil to the combustion chamber be a self-contained unit and in the present device the entire apparatus is supported upon a stand 1 containing asuitable receptacle portion 2 for housing the automatic electric switch apparatus and on the top of the stand is arranged a tray structure 3.

An electric motor l is mounted on one end of the tray and in alignment therewith and connected to the shaft thereof is a high speed rotary air pump 5. This pump is provided with a rotor 6 eccentrically arranged within a cylinder 7 and carrying a plurality of radial vanes 8 engaging the inner periphery of a cylindrical liner 9.

The cylinder casing is cored, providing intake and exhaust ports '10 and ll'rcspcctive-.

at each side of the liner.

The intake port is connected with a passage 12 which leads from a chamber 13 in the base of the pump and a tube 14 extends upwardly into said. passage from a recess 15 forn'iing a sump in the bottom of said base.

An opening 16, shown in dotted lines in Figure 4 and in section in Figure 5 leads from the chamber 13 to a chamber 17, this latter chamber being connected to one end of the tray 3 of which the pump base and chamber 13 form it part.

The chamber 17 is provided with a plurulity of holes 18 opening to atmosphere through which a supply of air to the pump 5 is taken. 7

The exhaust port 11 of the pump is connected with a downwardly extending passage 19 in the pumpcasing and leads to a. chamber 20 in the form of a depression in the top side of the chamber 13.

A baffle plate 21 is supported inthe chamber 20 and is provided with a plurality of vertical baiiics 22 which alternate between dey pending bullies 23 from the underside of the cylinder casin The air discharged from the pump flows throu h the chamber 20 around the bullies to a disc large passage 24, to which a suitable tube 25 is connected, which leads to the entrance to the combustion chamber of the furnace 26.

The purpose ofthe suction tube 14 in the air intake passage to the air pump is to supply to the pump a quantity of oil which will lrccp the pump bathed in a lubricant. Lateral oil channels 27 lead from the intake passage 12 to the journal bearings 28 and oil passages 29 connect with the dischcrge from the air pump to said bearin s.

Oil is fed to the-bearings from the discharge and prevented from escaping from the journals at the outer ends of the passages 27 and the continuous flow of lubricaiit through the operating parts is assured.

A. worm 30 is mounted on the outward end of the air pump shaft and meshes with a worm wheel 31 which is mounted on a shaft 32 arranged at right angles to the are pump shaft and this shaft is connected to the gear pump 33 which draws the oil supply from the reservoir. I

An enlarged sectional detall of the oil pump is shown in Figure 9.

The shaft 32 carrying the upper one of the pump gears 34 has mounted upon its outward end a worm 35 which meshes with a worm wheel 36 carried on a vertical tubular spindle 37 mounted in a bearing in the casing 38 A spindle 39 is adjustably supported from a nut 40 in the top of the casing 38, being" threaded in said nut and secured by a lock nut 41.

This spindle extends downwardly through the tubular spindle 37 and its lower end 42 is hollow and a small orifice 43 is arranged in the side of this hollow end communicat' ing with the interior of the casing 38.

The lower end of the tubular spindle is tapered to a thin edge and the stationary spindle 39 may be adjusted vertically so that the edge of the tubular spindle cuts the orifice, thereby regulating the quantity of oil that wil flow out through the bottom end of the spindle 39.

The bottom end of the spindle 39 is surrounded by a packing at so that oil from the pressure chamber in the casing 38 will not escape around the spindle.

The rotation-ot the tubular spindle 37 causes a uniform flow of oil through the small orifice in the fixed spindle. This feature is not new to the applicants and needs no further elaboration.

A nut 4-5 is secured in the boss 46 in which the packing H is arranged and to this nut is secured a tube 47. i

The pipe 47 leads to the furnace. being here shown entered in the side wall of the air tube 25 leading to the furnace and ex; tending through said air tube to the atomizins nozzle 48 at the end of the air tube.

The construction of this nozzle is not' shown as any suitable form of atomizing nozzzle may be provided.

A suitable pressure gauge 49 is connected with the casing 38 to indicate the pressure of the oil in the chamber.

The oil supply to the oil pump comes primarily from a suitable reservoir through the pipe 50 to a casing 51 in which is arranged a triple ball check valve 52 which regulates the flow of oil to the chamber 53.

The chamber 53 is connected with an oil chamber 54: by a ferrule having a valve seat at the bottom.

A cylindrical fioat chamber 56 extends upwardly from the chamber axially above the ferrule and contalns a float 57 which is flexibly connected by the rod 58 to a valve 59 arranged. upon one end 01' a pivotal arm 60 arranged in the chamber 53, said rod extending through the ferrule The other end of the arm 60 is provided with a pin 61 adapted to lift the balls in the check valve 52 from their seats upon the lowering of the float in the float chamher to a predetermined level to allow the oil to flow from the pipe 50 into the chamber 53 and from thence through the ferrule to the chamber 54 and the float chamber.

Connected with the chamber is a tube 2 which connects with the bottom of the chamber 17.

A partition 63 is arranged in the upper portion of the chamber 17 and a pipe (S is suspended from this partition centrally and extends downwardly of the tube 62. the lower end entering the chamber 54.

The upper end of the pipe i is connected with a plug 05 provided with transversely arranged holes 66. Oil is drawn upwardly through the pipe 64 into the chamber (37 above the partition (33 and it flows into a strainer arranged in a vertical chamber (5!) leading from one end of the chamber 67.

A vertical passage leads upw.'irdl v from the bottom of the strainer chamber and is connected by a pipe 71 with the intalze oi the oil pump 5.

The oil drawn through the gears of the -pump 5 is discharged through a passage T2 shown in dotted lines in Firrure 9 leading to the interior 6f the casing 38 from whence it is measured by the orifice 43 in the spindle to feed to the burner nozzle.

The casing SS-is provided with an outlet port 73 connected with a valve chamber Tl and this port is closed by a spring loaded valve 75. the pressure of which may be regulated by means of a threaded spindle 7 extending through the nut 77 closing the top of the alve chamber.

A lateral orifice 78 leads from the chanr ber 74 and it is connected by a pipe 7.) to the chamber 17 from whence it flows into the tube 62 which forms a sump for the main oil supply.

The pipe 79 connects to the chamber 17 through a small casing 80 secured to the side of said casing and the casing 80 connects through the opening 16 to the chamber 13.

Oil is fed to the chamber 153 to he picked up by thev tube 14 and carried to the intake of the air pump 5. The oil thus utilized to lubricate the pump and after being so used. it is separated From the air in saidbaffie chamber 20 which is connected to a pipe 81 leading to a valve chamber 82 in which is arranged an adjustable spring loaded valve 83.

The valve 83 is arranged to regulate or offset. the pressure of the pump so that when there is not suiiicient quantity of oil in the The flow of the oil from the reservoir to the hall check 52 is efiected by gravity. This ball check is operated by the pivotal arm 60 through the float 57 actuated by the level of oil in the float chamber and being a triple ball check there is very little liability of leakage, as a particle of dirt clogging one valve will not affect the other. As a safety factor, however, the arm 60 is provided with a valve 59 adapted to close the chamber 53 so that in the event. of the valve .32 becoming inoperative to check the flow, the float will ultimately close the valve 59 against its seat.

The oil is drawn from the chamber 54 upwardly through the pipe 64 and it is passed through the strainer 68 so that. any particles of foreign matter will be arrested. From the strainer chamber it is carried through the passage 70 to the pipe 71 to the oil pump and a continuous tlow of oil under pressure to the chamber of the casing 38 is maintained. Oil is taken from this chamber in a predetermined quantity eticcted by the regulation of the adjustable spindle 39 und the excess oil, lifting the spring; loaded valve 75, flows through the pipe 79 to the chamber 17 which connects with the tube'GQ. The oil thus lows in a continuous cycle, a certain regulated quantity being taken to the distributing nozzle or burner, Where it is mixed with the air. Incidentally the continuous circulation of the oil provides a. definite means for lubricating the air pump but such air pump is not utilized as a means for atomizing the oil. On the contrary the small quantity of oil that is passed through the air pump to'lubricate it is conducted through a separating chamber provided with baiiles and this oil is conducted through the pipe 81 to the chamber 17 from whence it is returned to the supply chan'iber connected with the tube 62. Lubrication of all the operating arts is therefore ensured so lon us there is oil to burn.

The device is very compact. It is simple in its construction and the oil feed is entirely automatic.

The furnace door structure here shown is of very simple arrangement provided to project the flame emanating from the nozzle 111 a downward direction into the fire pot. j

The door 84 is provided with a casing extension 85 which extends well into the fire box.

lhe bottom part of the casing 85 is; rovided with a step 86 at its inner en in which is arranged a hole 87.

The nozzle 48 secured to the air tube 25 is arranged to direct its spray of air and oil through the hole. The special arrangement is provided to facilitate the ignition of the atomized oil by means of a spark igniter 88 or any other suitable form of ignition. de vice.

it will be noted that the chamber connected with the intake of the air pump is rent of the air and no fumes will be ullowed The oil gathered in the sepuruting chnmher 20 is also discharged into the chamber 17 and hny volatiles or air passing through this channel. will he picked up by the inflow to the pump intake.

What we claim as our invention is:-

1. An oil burner comprising a high speed rotary air pump, an oil pump geared to said air pump, an Oil supply connected with the said oil pump. means connected with the discharge from said oil ump for measuring the oil to be burnt, an an tube leading from the air pump to an atomizing burner nozzle, an oil tube leading from said meesurin means to said burner nozzle, controlle means for returning the surplus oil from the oil pump to to suppl means for directing a portion of the surp us return oil through the air pump, means for separetino' the oil circulated through the air pump tirom the air, and means for returning the separated oil to the supply.v

2. An oil burner, comprising a. high speed rotary air pump, means for feeding lubricating oil to the intake of said pump, means for separating the oil from the discharge from said pump, an air tube leedingtrom the discharge to a burner nozzle, an oil pump operatively connected with said air pump; adjustable means for conducting a.

regulated supply of oil from theoil pump to said burner nozzle, an oil so ply connected with the intake of said oil pump, e discharge from said oil pump returning the surplus oil to said supply and supplying oil to said means for feeding oil to the sir pump.

3. In an oil burner, e high speed rotary .air pump, a chamber connected with the intake to said pump, means for feeding oil to said, chamber, a tube leading into the pump intake from the bottom of said chamber, a

ohun'iber connected with the discharge from said pump, battles in said discharge chamber, means for conductingthe oil from the bottom of the latter chamber, an air tube connected with the discharge from said baflie chamber, an atomizing burner nozzle secured to said air tube. an oil supply, and an oil pump operatively connected with said air pump, and feeding oil to said atomizing burner nozzle and to said air pump intake chamber.

1. In an oil burner. a high speed rotary air pump. a cham er connected with the intake to said pump. means for feeding oil to said chamber. a tube leading into the pump intake from the bottom of said chamber, a chamber connected with the discharge from said pump. battles in said discharge chamber. means "for conductim; the oil from the bottom of the latter chamber, passages leadin; from the discharge passage of said pump to the journal bearings, return passages from the journal bearings connected with the intake passage of the pump, an oil pump operativelv connected with the air pump shaft feeding oil to the pump intake and to a burner nozzle, a discharge passage from said air pump leading re the burner nozzle.

and means tor separating the oil from the.

air passage to said discharge passage.

5.111 an oil burner, in combination an oil supply conduit. :1 check valve closing said conduit. a float chamber connected with said conduit. means connected with the tloat in said tloat ch: her for opening said check ratve to allow the flow of oil from said conduit to said float chamber, asccondary valre ctmnected to said lioat for shutting oti' thc supply to the float chamber. a pipe leadin; from the bottom or the float chamber, a strainer chamber connected with said pipe, an oil pump connected with said strainer chamber, a feed chamber connected with the discharge from the oil pump, adjustable means for regulating the discharge of oil from said feed chan'iber to the burner, an adjustable relief valve for said feed chamber, and means l'or returning the over-flow from d feed chamber passing said adjustable valve to the lloat chamber.

(3. In an oil burner, the combinz'ition with an oil pump and an oil supply, of a casing connected with the discharge from the oil pump having a spring loaded relief valve,

an adjustable spindle passing through said casing and having a discharge passage leading from the casing, a sleeve rotatably mounted and encircling said spindle and cooperating to feed the oil into said dis charge passage, means connected with the oil pump for rotating said rotatable spindle. and means leading from said casing controlled by said spring loaded relief valve for directing the surplus oil pumped t the, asing back to the supply connected with the intake of the pump.

7. An oil burner, comprising a stand having a chamber therein, an air pump arranged over said chamber baring an intake passage connected therewith. an oil tub.- leading into said intake passage from the bottom of said chamber. a recess in the top wall of said chamber connected with the discharge from the air pump. balllcs ar ranged in said recess. a passage leading from said intake chamber. a (11 l1lgf connected with said passage having the opcninps cumlt'ctwl with the atmosphere. an oil supply. a tube connectiirethe latter chamber with aid oil supply. an oil teed pipe leadingupwardhr through said oil tube. an oil pump connected with said oil teed pipe. a discharge from the oil pump connected with the, cham er connected with said tube and forming a return with the oil supply. means interposed between the oil pump and said return chamber for diverting a measured quantity of oil to a burner, a burner connected with said diverting means, and an air pump connected with said burner.

8. In an oil burner system, a burner nozzle, an air pump supplying air to said nozzle, a chamber connected with the intake of said pump, an oil supply connected with said intake chamber to etl'ect the lubrication of the pump, a separating chamber connected with the discharge from the air pump, a conduit connecting the separating chamber with the intake chamber. an adjustable spring loaded valve controlling the flow of oil from the separating chamber to the intake chamber. and means for supplying fuel oil in regulated quantities to the burner nozzle independent of the aiusuppl v.

ARTHUR P. HOLDEN. PHILIP MORGAN.

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