US1925571A - Oil burner apparatus - Google Patents

Description

SePt- 5, 1933 H. s. ROGERS Er AL. 1,925,571

on. BURNER APPARATUS Filed Nov. 29. 1926 5 sheets-sheet 1 A TTORNE Y.

Sept. 5, 1933. H. s. ROGERS r AL 1,925,571

OIL BURNER APPARATUS Filed Nov. 29. 1926 5 Sheets--Sheet 2 A\ f l m ATTORNEY. l

Sept. 5, 1933. H. s. ROGERS Er AL 1,925,571

ou. BURNER APPARATUS Filed Nov. 29, 1926 5 Sheets-Sheet 3 'ill i il t I VENTOR.

BY i WMMMQMW A TTORNE Y.

.Sept 5, 1933 H. s. ROGERS ET AL 1,925,571

oIL BURNER APPARATUS Filed Nov. 29, 1926 5 sheets-sheet 4 rNI/ENTOR. By M W ,6,4226 M Mu him A TTORNE Y.

Sept. 5, 1933. H, s, RQGERS ET AL 1,925,571

OIL BURNER APPARATUS Filed Nov. 29, 1926 v5 Sheets-Sheet 5 INVENTOR.

M BY

' ATTORNEY.

Patented Sept. 5, 1933 PATENT oFr-ICE on. BURNER APPARATUS- Homer s. Rogers and Richard mam, mi..

waukee, Wis., assignors to Combustion Fuel Oil Burner Company, Milwaukee, Wis., a corporation of Wisconsin Application November 28, 1926 l SerialNo. 151,326

2 claims. (cL 13s-144) Thisinvention relates to improvements in oil. burning apparatus of the type more particularly adapted for heating homes.

One of the objects of the present invention. is

` to provide oil burning apparatus of the characv ter referred to having an oil burning nozzle and a valve for controlling the oil flow thereto, and.v a gas jet and pilot therefor supported adjacent the nozzle for igniting the oil spray issuing therefrom, and a valve for controlling the gas flow to said jet, and wherein a fluid-pressure motor is provided which is common to and which operates to impart controlling movement to these valves upon-admission of fluid under pressure to the motor.

Another object is to provide, in apparatus of the character referred to including an oil supply chamber and av valve disposed therein for controlling th'e flow to the burner and a valveactuating member extending into the chamber into operating relation with the valve, a yieldable member supporting the valve-actuating member for operating movement and which provides a seal between the latter and the oil supply chamber.

Another object is to provide, in oil burning apparatus of the character referred to including a valve for controlling the oil flow to the burner nozzle and an igniting gas jet disposed at the nozzle, a valveV for controlling the gas flow to the jet, and a connection for supplying oil-atomizing air to the nozzle; a fluid-pressure motor connected to such connection and operable upon admission to the latter of air under proper operating pressure to open the oil control valve to permit 110W of oil to the nozzle and to simultaneously open the gas supply valve for the gas jet, the arrangement being such that upon failure of the compressed air supply the motor operates to permit closing of the oil supply valve for the nozzle and the gas supply valve for theigniting gas jet.

Another object is toprovide improved appara- 4r tus of the character referred to which is comparatively simple and compact and which may be assembled as a unit and disposed in close proximity to the burner nozzle.

Other objects and advantages will hereinafter appear.

For the purpose of illustrating the invention several embodiments thereof have been shown in the drawings, in which Figure 1 is a plan view of the burningv apparatus;

improved oil `Fig. 2 is an enlarged sectional view, the section being taken on the line 2-2 in Fig. 1;

Fig. 3V is a sectional view, the section being takenontheline3-3inFig.2;. A

Figs. 3a and 3b are fragmentary detail views oo of the metering valve shown in Fig. 3;

Fig. 4 is an enlarged plan view, partly broken away and partly in section, the section being taken on the line 4 4 in Fig. 2, some of the parts being removed for the sake of clearness; 65

Fig. 5 is a side elevational view of the improved oil burning apparatus;

Fig. V6 is a view similar to Fig. 5, showing a modification;

Fig. 'l is an enlarged plan view of Fig. 6; and 70 Fig. 8 is an enlarged sectional view, the section being taken on the line 8-8 in Fig. 6.

In the embodiment of the invention shown in Figures 1 to 5 inclusivean oil burning nozzle l10, which may be of any suitable construction,

is provided and is shown as being supported at the front 11 of a furnace or boiler and extending through'the same. The nozzle 10 is, connected through a pipe line 12, a coupling 13, an elbow .14, a'coupling 1 5, a pipe section 16 and an elbow 80 17 to the header of an air compressor designated generally by the reference numeral 18 and which may be of the rotary type and which is driven by an electric motor 19. The open end of coupling 13 is shown as being vclosed by a nipple 20 85 and a cap 21. The nozzle is connected through an oil line 22 and an elbow 23 with the oil supplyv chamber to which is connected, as more clearly shown in Fig. 3, an oil supply line 25 which is connected by the couplings 26 and 27 90 to the outlet side of 'the rotary oil pump designated generally by the reference numeral 28 and having its impeller shaft 29 connected through the coupling 30 to the impeller shaft 31 of compressor 18. From the foregoing it will be seen A that the air compressor 18 and oil pump 28 are connected directly to motor 19 for operation thereby and that the impeller shafts of the compressor and pump are in alignment with the armature shaft 32 of the motor. .The air com- 100 pressor, as indicated in Fig. 1, is provided with the usual intake connection 33 having at its open end a suitable muiiler 34. A suitable gage 35 may be connected to the header of the air compressor 18 to provide an indication as to the 105 operation thereof. Oil is fed from a suitable supply tank (not shown) to the intake side of pump 28 through the connection 35a and a suit= able strainer indicated generally by the reference numeral 36. A. gage 37 may be connected to the 110 open end of coupling 26, as shown, to provide an indication as to the operation of the oil pump 28,

For the purpose of controlling the oil iiow to nozzle 10 by way of chamber 24, a valve 38 is disposed in the latter and arranged upon :movement to the left, as viewed in Fig. 2, to shut 0H communication between the oil supply line 25 and chamber 24, the valve being provided with the stem 39 and being urged at all times to closed position by the spring 40 held compressed between the plug 4l and the adiacent end of the valve stem. The valve chamber 24 is provided with the opening 42 which registers with a similar opening 43 in the supporting base 44 to which the chamber may be secured by the stud bolts 45. A yieldable member 46, which may be in the form oi a flexible and resilient diaphragm of suitable metal, is. interposed and clamped tightly between base 44 and chamber 24 by bolts 45, lead packing 4'? being provided at the edge oi the diaphragm 46 whereby the latter provides a seal for opening 42 and prevents any leakage of oil by way of the latter from chamber 24. A valve-actuating member, indicated generally by thevreference numeral 48, comprises the part 49 disposed interiorly of the chamber 24 below diapbragm 46 and the part 50 disposed exteriorly of the chamber above the diaphragm, and the bolt 5l which passes loosely through part 50 andthe diaphragm and is threaded into part 49, as shown, the nut 52 being threaded upon the upper end oi the bolt. and tightened whereby the bolt and its associated nut provide a rigid connection between the parts 49 and 50 and operate to clamp the diaphragm tightly between' the adjacent ends oi these parts. A suitable packing washer 53 may be interposed between part 56 and nut 52, as shown, to prevent any possible leakage of oil from chamber 24 through the central opening 'in diaphragm 46 through which bolt 51 passes and along the latter and out between nut 52 and the adjacent face oi part 50. The lower end oi part 49 is bfurcated and straddles the valve stem 39, as more clearly shown in Fig. 3, so that upon relative tilting movement ci member 48 with respect to chamber 24, in a counter-clockwise direction, as viewed in Fig. 2, the oil control valve 38 will be caused to move to the right to open position against the action of spring 40, the member or diapbr 46 being sufficiently yieldable to permit of such relative tilting movement of member 48 while providing a support therefor as well as a seal between the same and chamber 24 at the point where the member 48 extends into the chamber. Anedjustable stud bolt 54 may be threaded into part 50 and arranged to engage the upstanding flange 55 oi base 44 to limit movement oi member 48 in a direction to impart opening movement to oil valve 38.

The oil chamber 24 is provided with the partition 56 into which is screwed the bushing 57 providing a seat for a metering valve 58. which is adjusted by the handle 59 xed to the upper end of the valve stem 69. The valve 58 is so a'usted as to permit the required ow of oil to the nozzle for proper operation, it being understood in this connection that movement of valve 38 to open position permits dow of oil from supply line 25 into chamber 24 at a rate in excess of the rate of oil flow from chamber 24 into line 22 by way of valve 58. in order to exercise its metering function without clogging, the valve 58 has a triangular notch 56a in the portion thereipaasvi ci that coacts with the seat 5'?, as illustrated to advantage in Figures 3a and 3b. Thus a metering action is had along with the maximum opening (permitting the free passage of any solids that may be entrained in the oil) for the necesarily small area of opening.

For the purpose oi operating valve 38, a huidpressure motor, indicated generally by the reierence numeral 6l, is provided and comprises' va :flexible diaphragm 62 interposed between the casing parts 63 and 64 secured together by bolts 65, the casing part 63 being cast integrally with base 44, as more clearly shown in Fig. 2. An internally threaded member 66 extends loosely through casing part 63 and has its nange end 62a iixed to diaphragm 62 by the bolt 6? passing through the latter and threaded into the adjacent end of member 66. A bolt 68 having the -head 69 extends through the upper bifurcated endl Z0 of valve-actuating member 49 and isf95 threaded into the outer exposed end of member 66 and is held against relative movement with respect thereto by loci: nut il. A spring "I2 is arranged on member 66 between the casing part 63 and the diaphragm 62 and operates to urge the latter at all times to the right, as viewed in Fig. 2. Piping 'Z3 connected to coupling l5 and the motor casing part 64 provides communication at all times between the right side of diaphragm 62 and the compressed air supply line for nozzle i9.

For the purpose of limiting the maximum opening of the metering valve 58, a bolt 74 may be threaded into a lug 75 formed integrally with the motor casing part 63 and caused to bear down upon the valve-actuating handle 59, the bolt 74 being in turn held in locked or holding position by the set screw 76.

From the foregoing it will be understood that upon operation of motor 19 to drive' the air compressor 18 and the oil pump 28, the pressure in the oil supply line 25 and the pressure in the air supply line 12-16 will rise to their respective operating points and that by reason oi the connection between the air supply line and the casing of motor 6l thepressure on the right side of diaphragm will increase to cause movement thereof' to the left, as viewed in Fig. 2, and to thereby tilt the valve-actuating member 48 to the left to open valve 38 against the action of spring 40, it being understood that the member or diaphragm 46 yields or exes suinciently to permit this operating movement of member 48, and that the head' of bolt 54 engages ange 55 to limit such movement of member 48 when valve 38 has been completely opened. By reason of the present construction, therefore, it will be understood that the oil supply valve 38 for the nozzle opens upon operation of motor 6l, and that the motor in turn operates only by reason of its connection with the air supply line for nozzle l0, and when the pressure in the latter has risen to a point sumcient to provide for proper atomization of the oil at the nozzle. The unit comprising base 44', the oil supply chamber 24 and motor 61 is secured by means oi bolts "I7 and lugs 78 cast integrally with the motor casing part 64 to the base 79 upon which are mounted motor 19, compressor 18 and the oil pump 28, base 'Z9 being provided with suitable legs 89.

The means for controlling the operation of the electric motor 19 is well known to those skilled in the art and includes the relay unit, designated generally by the reference numeral roo circuit which in turn causes the relay to disconnect the motor from the supply line. It is common practice to provide oil burning apparatus with some form of safety device operable upon failure of combustion to open the relay circuit and disconnect the motor A19 from the supply line. Such a safety device has been shown in the drawings, and is designated generally by the reference numeral 82 and is connected in the relay circuit by the cable 83. The device 82 is responsive to combustion conditions and operates upon combustion to permit the relay to remain in operating position, the arrangement being such, however, that upon failure of combustion at the nozzle the device 82 after a relatively shortperiod of time will cause opening of the relay circuit and disconnection of motor 19 from the supply line.

The means for igniting the combustible mixture issuing from the nozzle 10 will now be explained, referring more particularly to Figs. 2, 3 and 4. A casing or housing 84 provided with the chambers 85, 86 and 87 has an integral attaching member 84a secured by bolts 88 to the ange 55. The chamber is connected to a suitable gas supply through the connection 85a. A valve 87 is slidably fitted in a plug 88' threaded into one end of housing 84 and operates to control the gas flow from chamber 85 .into the chamber 87, a spring 89 operating at all times to urge valve 87 to closed position. Piping 91 provides communication between chamber 87 and a suitable gas jet 92 supported at nozzle 10 in igniting relation with respect thereto, as more clearly shown in Fig. 2, the front 11 of the furnace or other heating unit being provided with the opening 93 to permit the flame issuing from jet 92 to pass into the furnace and ignite the oil spray issuing from nozzle 10. A pilot 94 is disposed adjacent jet 92, as shown, and is connected through the piping 95 to chamber 86, a needle valve 96 being provided to regulate the gas flow from chamber 85 into chamber 86 and thence to the pilot by way of piping 95. A rod or plunger 97 extends loosely through housing 84 with one end engaging the head 69 of bolt 68 and its other end engaging the valve 87'. Suitable packing 98 is provided to prevent leakage of gas from chamber 87 to atmosphere, the packing being held compressed by the spring 99 compressed between thelatter and the plug `100 threaded into the adjacent end of housing by way of chambers 85 and 87 -and piping 91,-

and that upon shutting down of the apparatus and return movement of the motor diaphragm 62 to the right, as viewed in Fig. 2, the valve 87 will be permitted to close' under the action of spring 89 to shut off the gas supply to iet 92 simultaneously with the closing of the oil supply valve 38.

'I'he combined action of s'prings- 40, 72 and 89 is such as to prevent operating movement of diaphragm 62 to the left, as viewed in Fig. 2, until the pressure on the right side of the dlaphragm is equal substantially to such air pres'-t sure in line 12-16 as is necessary Vto effect proper atomization of the oil supplied to nozzle 10.

In the modification shown in Figs. 6, 7 and 8 the means for igniting the oil spray issuing from the nozzle is in the form of a spark gap 101 mounted onv a sleeve 102 fitted over the nozzle for sliding movement along the same and provided with the depending lug 103 which loosely received one endl of a rod 104 having its other end 105 xed'in a dependingl lug 106 the zone. of combustion after it has served its purpose of igniting the oil spray, such means comprising the fluid-pressure motor 108 provided with the diaphragm 109 to which is fixed 105 the pin 110 engaging the arm 111 pivotally connected at one end to the motorcasing by the pin 112 and at its other end to the sleeve 102 'through the rod 113. The motor 108 is connected through the piping 114 to the air supply line for the nozzle, as more clearly shown in Fig. 7, and is provided with the needle valve 115 which permits only a retarded flow of compressed air to the left side of diaphragm 109. A check valve 117 is arranged to close with the pressure in piping 114 and seats over openings 117 providing additional communication between piping 114 and the left side of diaphragm 109. Upon starting of motor 19 and rise in pressure in the air and oil supply lines to the respective operating points, air under pressure will begin to flow at a relatively retarded rate through valve 115 to the left side of diaphragm 109, the cubical contents of the motor casing on this side of the diaphragm being made relatively great, as shown, so that an appreciable period of time elapses before the pressure builds up sufficiently on the left side of diaphragm 109 to cause operating movement of the latter to withdraw spark gap 101 to the right out of the zone of combustion. Before motor 108 operates to withdraw the spark gap, however, the fluidpressure motor 61 will have operated to open the oil supply valve 38 for the nozzle, and the spark gap 101 will have performed its function to ignite the combustible mixture. When the operating electric motor 19 is shut down, and the air pressure in the supply .line 12' and piping 114 connected to the latter drops to atmospheric, the compressed air on the left side of vdiaphragm 109 will be permitted to vent freely to atmosphere at a relatively rapid rate by way of the relatively large openings 117, the check valve 116 opening with the pressure within the. motor casing on this side of the diaphragm. By reason of the foregoing construction, therefore, the spark gap 101 is permitted to return to operating position at a relatively rapid rate under the action of spring 106' so that the spark gap will be in operating position in the event motor 19 is shut down and then irrimediately started again. j

The igniting means just described is more fully shown and described in copending appli cation Serial No. 60,936, led October 7, 1925, and has only been shown and described in sumcient detail to enable those skilled in the art to understand in what way such igniting means may be embodied in the present improvements.

Referring again to Figures 1 and 5, a suitable relief valve 118 is connected to coupling 27, as shown, and is arranged to open with the pressure in the oil supply line 25 when this pressure reaches a predetermined high point, the relief valve being connected through the piping 111.9 to the usual'fuel supply tank (not shown).

The relief valve lilthereby provides for the return to the supply or storage tank otthat amount of oil pumped to chamber 24 in excess of the amount of oil which ilows through the metering valve 58 to the nozzle..

Aside from the igniting means, the construction and arrangement shownin Fig. 6 and 7 is identical to that shown in Figs. l and 5, and to simplify matters the various parts shown in Figs. 6 and '7 have been designated by primed reference numerals corresponding to the respective reference numerals of corresponding parts in Figs. l and 5.

When the chamber 2d is rst lled with oil, air is trapped in the upper part thereof and this air is bled from the chamber through a vent V provided therefor. After the bleeding of the air the vent is kplugged as indicated at P in Fig. 2.

While a preferred embodiment of the invention has been shown and described, it will be understood, of course, that various changes may be made, such as in the size, shape. and arrangement of the parts without departing from the spirit of the invention or the scope of the claims.

The invention claimed is:

l. An apparatus of the character described accetti comprising a supporting base, a housing secured to said base, a lnuid supply connection to said housing, a valve disposed in said housing for controlling uid iiow therethrough, a uid pressure motor secured to said base, means providving an operating connection between said valve and said motor and operable upon admission ci uid under pressure to' the motor to impart controlling movement to the valve," a second uid supply chamber secured to said base, a

valve disposed in said chamber for controlling iiuid ow therethrough, an actuating member for said last mentioned valve interposed between said housing and said motor and engageable by said means for operation vthereby and a fluid supply connection for said motor.

2. An apparatus of the character described comprising a supporting bacse having an opening, a uid supply chamber having an opening alined with the opening of the base, valve means `disposed in the chamber for-controlling uid dow therethrough, a resilient diaphragm interposed between the base and the chamber, means for clamping the diaphragm between the base and the chamber whereby the diaphragm seals the opening of the chamber, a valve actuating member clamped to the diaphragm and connected to the valve means, said valve actuating member projecting through the opening of the base, a uid pressure motor rigid with the base and having driving means connected thereto and partaking of operative movement substantially at

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