US3315604A - Oil burner assemblies - Google Patents

Oil burner assemblies Download PDF

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Publication number
US3315604A
US3315604A US443441A US44344165A US3315604A US 3315604 A US3315604 A US 3315604A US 443441 A US443441 A US 443441A US 44344165 A US44344165 A US 44344165A US 3315604 A US3315604 A US 3315604A
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US
United States
Prior art keywords
oil
housing
motor
wound stator
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US443441A
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English (en)
Inventor
Eugene A Roeske
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emerson Electric Co
Original Assignee
Emerson Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emerson Electric Co filed Critical Emerson Electric Co
Priority to US443441A priority Critical patent/US3315604A/en
Priority to GB3583/66A priority patent/GB1118678A/en
Priority to FR48179A priority patent/FR1466910A/fr
Priority to DE19661501822 priority patent/DE1501822A1/de
Priority to DK79466AA priority patent/DK109645C/da
Priority to CH214766A priority patent/CH451381A/de
Application granted granted Critical
Publication of US3315604A publication Critical patent/US3315604A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/001—Spraying nozzle combined with forced draft fan in one unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/44—Preheating devices; Vaporising devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2700/00—Special arrangements for combustion apparatus using fluent fuel
    • F23C2700/02—Combustion apparatus using liquid fuel
    • F23C2700/023—Combustion apparatus using liquid fuel without pre-vaporising means

Definitions

  • blower housing outside and at one side of which is an electric motor and outside and at the other side of which is an oil pump.
  • a blower wheel inside the housing is mounted on the motor shaft, which extends through the housing.
  • the motor is either fully enclosed, or is provided with a fire pan extending beneath it.
  • the motor shaft is coupled by means of a long coupling to the shaft of the oil pump.
  • One of the objects of this invention is to provide an oil burner assembly which is more compact than assemblies known heretofore, and at the same time is more efficient.
  • Another object is to provide an oil burner assembly in which the heat generated within the electric motor is utilized to improve the efliciency of the oil burner and at least some of its components.
  • an oil burner assembly which includes an electric motor having a wound stator and a motor housing in heat transfer relation with the wound stator.
  • An oil chamber is defined within the housing in heat transfer relation therewith, and fuel oil to be supplied immediately to the furnace is passed through the oil chamber to pick up the heat from the wound stator prior to the oils being introduced to the furnace.
  • the wound stator is mounted within the blower housing itself, and a blower wheel, connected to be driven by the motor shaft, is provided with blades which encompass the wound stator, within a passage defined between the stator and the blower housing.
  • the blower housing is continuous along the under side of the motor, so as to form a fire pan for those embodiments of the assembly in which open motors are used.
  • the blower housing is open at one end to admit air, and is provided with a discharge opening so located that the air drawn through the inlet openings by the blower, passes in heat transfer relation to the wound stator as it moves through the passage between the stator and the blower housing, so as to be preheated before it reaches the furnace, and to dissipate heat from the wound stator.
  • the motor housing includes an end shield which carries a bearing in which a rotor shaft (the motor shaft) is journalled.
  • the end shield is provided with an elongated passage which serves as the oil chamber.
  • the end shield serves as one closure member of a totally enclosing motor housing, the interior of which serves as the oil chamber so that fuel oil introduced to the oil cham- 3,315,604 Patented Apr. 25, 1967 her is in direct contact with the windings of the wound stator.
  • the means for introducing to the furnace the oil component of the flammable mixture includes a gear pump of the internally toothed type, having a suction and a discharge side.
  • the suction side of the pump is connected to communicate with the oil chamber.
  • an internally toothed gear is journalled within a pump housing, which, in the preferred embodiment, is an integral part of the end shield.
  • the pump is closed by a pump housing cover, which also contains a valving device and fittings for connections to a fuel oil conduit to a nozzle in the furnace and to a source of fuel oil.
  • a manifold with suction and discharge manifold parts may be provided in the cover or in the end shield, or both depending upon the embodiment.
  • gear pump type of burner assembly is preferred, for reasons of simplicity, efficiency, and compactness, many of the features of this invention are applicable to other types of oil introducing devices, such as eductors e.g. so-called low pressure systems.
  • FIGURE 1 is a sectional view of one embodiment of oil burner assembly constructed in accordance with this invention.
  • FIG. 1 is a sectional View taken along the line 22 of FIG. 1;
  • FIGURE 3 is a sectional view taken along the line 3 3 of FIG. 1;
  • FIGURE 4 is a sectional view showing still another embodiment of oil burner assembly of this invention.
  • reference numeral 1 indicates an oil burner equipped with an assembly of this invention.
  • the oil burner 1 includes a furnace plate 2, a transformer 3 which forms part of the conventional ignition system, an air duct 4, an oil discharge conduit 5, which termimates in a spray nozzle, not here shown, and an assembly 10.
  • furnace plate 2 The furnace plate 2, transformer 3, air duct 4 and oil discharge tube 5 are all standard commercial components, and, as such, form no part of this invention.
  • the assembly 10 includes a motor 20, a blower assembly 60, 'a pump 80, and a valve assembly 90.
  • the motor 20, in this embodiment, includes a heavy end shield 21, an end bell 22, a wound stator 23, a rotor 24 and a rotor shaft 25.
  • the end shield 21 and end bell 22 together form a motor housing 30.
  • the rotor shaft 25 is journalled, at one side of the rotor 24, in a bearing 26 in a hub section 27 of the end shield 21, and on the other side of the rotor, in a bearing 28 in a boss 29 on the end bell 22.
  • the end bell 22 is deep, and is provided with an inner shoulder 31 against which a laminated core 35 of the stator 23 rests to locate the stator with respect to the motor housing 30.
  • the end bell 22 has an exterior rabbet at its open end, which mates with a flange on the end shield 21, and forms, with the aid of an O-ring 33, an oil tight oil chamber 37.
  • Windings 36 extending within slots in the core 35 and having end turns projecting at each end from the core 35, are exposed within the oil chamber 37.
  • Pins 38 on either side of the core 35, serve to hold back the end turns of the windings 36, so that they will not interfere with end rings 39 of the rotor 24.
  • the end ring 39 adjacent the hub 27, in the embodiment shown, has formed in its blade 40, which help circulate the oil in the oil chamber 37.
  • a passage 42 in the boss 29 of the end bell 22 leads between the bearing 28 and a gland 43, to permit oil to lubricate the outer end of the bearing 28.
  • An oil supply passage 41 in the hub 27 of the end shield 21 communi- I its outer periphery.
  • a screen 49 is positioned within the compass of the end bell 22, with one, inner margin of the screen bearing against the boss 29, and an outer margin bearing against a radial surface of the stator core 35.
  • a passage 51 extends through the stator core 35, communicating at one end with the oil passage 46, and its other, with a part of the oil chamber 37 between the end bell 22 and the screen.
  • the motor 20 is mounted on and'largely within a blower housing 61.
  • the blower housing 61 includes side walls 62 and 63, and a scroll-defining web 64.
  • the web 64 isimperforate, and forms an enclosure constituting a fire pan around the lower part of the motor 20.
  • the wall 63 has a motor-receiving opening, within which end shield 21 is seated with the flange 48 in engagement with the opening-defining margin of the wall 63, as shown in FIG- URE l.
  • the motor is held in position by any suitable means not here shown, whichmay take the form of bolts and spring-nuts such as is illustrated in connection with the embodiment shown in FIGURE 4.
  • the wall 62 is provided with a multiplicity of radially extending wedge shaped openings 64 and a damper plate 65, mounted on the wall 61 by means of a bolt 66,
  • blower wheel 70 is mounted, by means of a hub 71, on one end of the rotor shaft 25.
  • the blower wheel includes a spider 72, welded to the hub 71' at one end and integral at its otherend with a rim 73, blades'75, integral at one end with the rim 73 and at the other end with an outer rim 76.
  • the blades 75 embrace the motor housing 30, and revolve within a passage 78 defined between the motor housing30 and the web 64 of the blower housing 61.
  • the pump 80 includes the manifold port 45 formed in the end shield'hub 27, a discharge balancing manifold 81, also formed in the hub 27, an externally toothed gear 82,
  • the I cover plate 91 has in it two manifold ports, a suction balancing manifold port 93 and a discharge manifold port 94.
  • the suctionbalancing manifold port 93 communicates with the suction side of the pump 80' at one end, and at itsother end with a valve bore 97 on one side of valve piston 98 slideably mounted in the bore 97.
  • the discharge manifold port 94 communicates at one end with the discharge, side of the pump 80, and :at its other end, with the valve bore 97 on the other side, axially, of the valve piston 98.
  • The, valve piston 98 has, on the discharge side,
  • valve stem 99 with a conical head 100, which seats against a valve seat 101 in a fitting 102, threadedlymounted in the valve casing 95.
  • the fitting 102 has an axially directed passage 103, communicating at one end with a passage in the valve seat 101, and at its other, with the, oil discharge conduit 5. On the suction side of the.
  • valve piston 98 the piston is provided with a spring boss 105, which positions a helical spring 106.
  • the helical spring 106 bears at one end on the under side of the valve piston 98, and, at its other end, on a stop washer 107.
  • Stop washer 107 bears against an end of an adjusting screw 108, which is threaded into the lower end of the casing 95 in axial alignment with the bore 97
  • the adjusting screw 108 is held in position by nuts 109.
  • a gauge fitting socket 112 On the discharge side of valve piston 98, a gauge fitting socket 112 is provided.
  • the socket 112 is normally I plugged, although a pressure gauge can be mounted perma-
  • the valve assembly 1s provided with ibypass passages so exceeds a predeterthat when the pressure from the pump the fuel oil is mined limit by the setting of spring 106,
  • stator windings immediately begin to heat, even as the motor is starting.
  • the rotor 24 begins 7 to rotate, turning the externally toothed gear 82 and the internally toothed gear 83, to begin pumping fuel oil from the oil chamber 37, in through the pa'ssage41 and suction manifold port 45 and out through the dischargemanifold' intimate contact with the windings 36 themselves, and-the rotation of the rotor 24 insures a vigorous circulation of the fuel oil within the oil chamber 37.
  • the rotation of the rotor 24 also causes rotation of the blower wheel 70, whereby around themotor casing 30. direct'heat transfer relation with the stator core 35, and
  • the heating o' f the air not only improve the eificiency of the atomizing and efliciency of the burning of the fueloil, but also serve to cool the motor 20; It is also to be noted that in theconstruction of this embodiment of oil burner assembly, only two bearings are required,--no couplings between shafts, and
  • Theassembly 110 is incorporated 'into an oil burner of the same type as that shown in FIG. 1.
  • the assembly 110 includes a motor 120, a blower160, a pump and a valve assembly 190.
  • the motor 120 in this embodiment, includes an outer end shield 121, an inner end shield 122, a stator housing 133, 'a wound stator 123, a rotor 124, and a rotor shaft 125.
  • the outer and inner end shields are rabbetedito so as to prevent injury to comes through the passage51 in the stator core 35,
  • the motor casing 30 isin) receive the stator housing 133, and held together by through-bolts 134, in this respect being conventional.
  • the inner end shield 122 carries a conventional bearing assembly 126, which includes felt oil rings 128.
  • a lubricating oil passage 129 extends radially through the inner end shield 122, and communicateswith the hearing assembly 126, so that the bearing assembly can be oiled.
  • the rotor shaft 125 is journalled at one end in a sleeve bearing in the bearing assembly 126, and projects through and beyond the inner end shield 122, to carry a blower assembly 170 which is identical in every respect with the blower assembly 70 of the embodiment shown in FIG. 1.
  • the motor 120 is mounted on and in part within the blower housing by means of bolts 135 extending through holes in the end shield 121 and corresponding holes in the blower housing, and spring nuts 136.
  • the outer end shield 121 has a heavy hub section 127.
  • the hub 127 carries a bearing 130, in which the other end of the rotor shaft 125 is journalled and through and beyond which it extends.
  • a gland drain passage 137 extends through the hub 127 from a sealing gland 138 to the suction side of the pump 180.
  • the hub 127 is provided with a relatively large annular channel 131, concentric with the bearing 130 and spaced radially outwardly from and extending around a pump housing 184, integral with the hub 127.
  • An accordian-folded screen 139 is seated in the channel 131.
  • Radially outboard of the channel 131 is an annular groove 132, in which an O-ring is seated.
  • the groove 132, channel 131, and pump housing 184 all open through a flat face 144 of the hub 127, and are all closed by a complementary face 191 of a housing 192 which is part of the valve assembly 190.
  • the housing 192 is bolted to the face of the hub 127 of the outer end shield 121 by means of studs, not here shown, but which may be similar to the studs 96 of the embodiment shown in FIGS. 1 and 2.
  • the pump 180 of this embodiment is substantially identical with the pump 80 of the embodiment shown in FIGS. 1-3. It includes a suction manifold port 145 formed in the end shield hub 127, a distance balancing manifold 181, also formed in the hub 27, an auxiliary suction manifold port 193 in the valve housing 192, and a discharge manifold port 194, also in the valve housing 192.
  • An externally toothed gear is keyed to the end of the shaft 125, within the housing 184, and an internally toothed gear is journalled in the housing 184, exactly as the gears 82 and 83 shown in FIGS. 1 and 2.
  • a fuel oil suction passage 141 communicates at one end with the suction monifold port 145, and at its other, with the channel 131, which, closed by the cover of valve housing 192, constitutes an oil chamber for the reception of fuel oil.
  • Au internally threaded fitting socket 147 is provided in the valve housing 192, which socket communicates, through a passage 146, with the chamber 131. As in the other embodiment, the socket 147 receives an externally threaded fitting on a fuel oil supply conduit communicating with a source of fuel oil, not here shown.
  • valve assembly 190 While there are some light differences in configuration of the parts, notably the valve seat and the valve head, the construction and arrangement of the valving parts of the valve assembly 190 are essentially the same as those of the embodiment shown in FIG. 1.
  • the hub 127 is in heat transfer relation to the windings of the stator 123, and the fuel oil, instead of circulating within the motor housing, circulates, through the screen within the chamber 131, where it picks up heat from the windings.
  • the operation of the oil burner assembly shown in FIG. 4 is substantially the same as that of the embodiment shown in FIGS. 1-3. If the amount of heat absorbed by the fuel oil in the chamber 131 is somewhat less than the amount absorbed by the fuel oil within the chamber defined by the motor housing itself in the first embodiment, the air, in the second embodiment, will be heated the more, and the greater temperature gradient between the initial temperature of the air and the temperature of the motor will promote greater heat transfer, hence greater cooling of the motor by the air and greater heating of the air by the motor than is accomplished by the embodiment shown in FIG. 1.
  • An oil burner assembly comprising an electric motor having a wound stator, a rotor including a rotor shaft, 21 motor housing including an end shield in heat transfer relation to the wound stator, a pump having an impeller, a pump housing, and suction and discharge manifold ports in said housing, a major portion of said pump housing being integral with said end shield, said impeller being connected to be driven by said rotor shaft, said motor housing having an oil chamber within it, in heat transfer relation to said wound stator, whereby fuel oil in said chamber is heated by said wound stator when the motor is in operation, said chamber communicating with one of said manifold ports, a blower housing encompassing the said motor and spaced radially from said wound stator to define therewith a passage, and a blower wheel mounted to embrace said wound stator, connected to be driven by said rotor shaft, and arranged to blow air through said passage.
  • An oil burner assembly comprising an electric motor having a wound stator,- a rotor including a rotor shaft, a motor housing in heat'transfer relation with the said wound stator, an oil pump having a pumping part connected to said rotor shaft and suction and discharge manifold ports, an oil chamber defined within said housing in heat transfer relation therewith, whereby fuel oil in said chamber is heated by said wound stator when the motor is in operation, said chamber communicating with one of said manifold ports, a blower housing encompassing the said motor and spaced radially from said Wound stator to define therewith a passage, and a blower wheel mounted to embrace said wound stator, connected to be driven by said rotor shaft, and arranged to blow air through said passage.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US443441A 1965-03-29 1965-03-29 Oil burner assemblies Expired - Lifetime US3315604A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US443441A US3315604A (en) 1965-03-29 1965-03-29 Oil burner assemblies
GB3583/66A GB1118678A (en) 1965-03-29 1966-01-26 Oil burner assemblies
FR48179A FR1466910A (fr) 1965-03-29 1966-02-02 Dispositif de brûleur d'huile
DE19661501822 DE1501822A1 (de) 1965-03-29 1966-02-14 OElbrenner
DK79466AA DK109645C (da) 1965-03-29 1966-02-15 Oliebrænderaggregat.
CH214766A CH451381A (de) 1965-03-29 1966-02-15 Olbrenner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US443441A US3315604A (en) 1965-03-29 1965-03-29 Oil burner assemblies

Publications (1)

Publication Number Publication Date
US3315604A true US3315604A (en) 1967-04-25

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ID=23760818

Family Applications (1)

Application Number Title Priority Date Filing Date
US443441A Expired - Lifetime US3315604A (en) 1965-03-29 1965-03-29 Oil burner assemblies

Country Status (5)

Country Link
US (1) US3315604A (da)
CH (1) CH451381A (da)
DE (1) DE1501822A1 (da)
DK (1) DK109645C (da)
GB (1) GB1118678A (da)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795104A (en) * 1986-06-06 1989-01-03 Cozzini Manufacturing Corp. Multi-station meat grinder with bone chip removal means
US5181837A (en) * 1991-04-18 1993-01-26 Vickers, Incorporated Electric motor driven inline hydraulic apparatus
US5320501A (en) * 1991-04-18 1994-06-14 Vickers, Incorporated Electric motor driven hydraulic apparatus with an integrated pump
US5577899A (en) * 1994-06-02 1996-11-26 Techco Corp. Hydrostatically balanced gear pump
US20130302186A1 (en) * 2011-01-21 2013-11-14 Detlef Kreutz Electric fluid pump having a cooled wet section

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1057282A (en) * 1911-06-26 1913-03-25 August Schaeffer Hair-drying apparatus.
US2494714A (en) * 1943-03-27 1950-01-17 Westinghouse Electric Corp Oil burner apparatus, including an automatic delay action fuel valve
US2658567A (en) * 1949-10-11 1953-11-10 Eureka Williams Corp Oil burner
US2776385A (en) * 1953-05-28 1957-01-01 Ami Ind Inc Connecting cord for use in connection with an electric power unit
US2885962A (en) * 1956-03-08 1959-05-12 Borg Warner Fuel pump
US3220461A (en) * 1963-07-29 1965-11-30 Gilbert & Barker Mfg Co Motor, oil pump and oil burner in combination

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1057282A (en) * 1911-06-26 1913-03-25 August Schaeffer Hair-drying apparatus.
US2494714A (en) * 1943-03-27 1950-01-17 Westinghouse Electric Corp Oil burner apparatus, including an automatic delay action fuel valve
US2658567A (en) * 1949-10-11 1953-11-10 Eureka Williams Corp Oil burner
US2776385A (en) * 1953-05-28 1957-01-01 Ami Ind Inc Connecting cord for use in connection with an electric power unit
US2885962A (en) * 1956-03-08 1959-05-12 Borg Warner Fuel pump
US3220461A (en) * 1963-07-29 1965-11-30 Gilbert & Barker Mfg Co Motor, oil pump and oil burner in combination

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795104A (en) * 1986-06-06 1989-01-03 Cozzini Manufacturing Corp. Multi-station meat grinder with bone chip removal means
US5181837A (en) * 1991-04-18 1993-01-26 Vickers, Incorporated Electric motor driven inline hydraulic apparatus
US5320501A (en) * 1991-04-18 1994-06-14 Vickers, Incorporated Electric motor driven hydraulic apparatus with an integrated pump
US5577899A (en) * 1994-06-02 1996-11-26 Techco Corp. Hydrostatically balanced gear pump
US20130302186A1 (en) * 2011-01-21 2013-11-14 Detlef Kreutz Electric fluid pump having a cooled wet section
US9879696B2 (en) * 2011-01-21 2018-01-30 Continental Automotive Gmbh Electric fluid pump having a cooled wet section

Also Published As

Publication number Publication date
DE1501822A1 (de) 1970-04-16
GB1118678A (en) 1968-07-03
DK109645C (da) 1968-05-27
CH451381A (de) 1968-05-15

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