US3514241A - Motor,pump,and blower system for oil burner - Google Patents
Motor,pump,and blower system for oil burner Download PDFInfo
- Publication number
- US3514241A US3514241A US704677A US3514241DA US3514241A US 3514241 A US3514241 A US 3514241A US 704677 A US704677 A US 704677A US 3514241D A US3514241D A US 3514241DA US 3514241 A US3514241 A US 3514241A
- Authority
- US
- United States
- Prior art keywords
- pump
- oil
- motor
- rotor
- blower
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/02—Liquid fuel
- F23K5/14—Details thereof
- F23K5/142—Fuel pumps
- F23K5/145—Fuel pumps combined with fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Definitions
- This invention relates generally to oil burners and more particularly to an oil burner system comprising a burner nozzle motor, oil pump and blower.
- the usual oil burner system has a motor which drives both the fuel oil pump and the air-supply source, for example a blower.
- the motor When the motor is turned off it continues to rotate due to the inertia of the assembly connected thereto.
- fuel oil continues t-o be fed by the fuel oil pump at a diminishing pressure for a relatively long period of time.
- This oil tends to drip from the nozzle as the pressure is reduced and the nozzle and areas on which the oil impinges become coked.
- the cut-off valves responded to the oil pressure, for example, and effect closure rapidly as soon as the oil pressure drops below a predetermined level.
- Another object of the present invention is to provide an oil burner system in which the avoidance of dripping oil once the oil pump is turned off is effected by simple means.
- an oil burner is supplied fuel oil by a fuel oil pump and a blower provides air for combustion of the oil.
- a common motor drives the oil pump and the air blower independently of each other.
- the motor comprises a single stator and has a rotor which is divided into two coaxial parts one of which drives the pump and the other the blower independently of each other.
- a feature of the construction is that the inertia of the rotating parts associated with the pump is considerably reduced.
- the motor is turned olf it comes to a stop more rapidly than heretofore in motors in which the pump and air supply source are mounted to be jointly driven from a common rotor.
- the motor is 3,514,241 Patented May 26, 1970 turned off less fuel oil is supplied and this avoids the dripping of oil that takes place if the pump does not stop rapidly.
- the air blower is not braked or damped by the pump so that it runs freely for a considerably longer time and therefore provides continuously a ow of air so that any oil that would tend to drip is consumed and blown away from the nozzle so that coking is not possible.
- the use of independent drive for the oil pump and blower means that upon switching off the apparatus the oil burner system need not have a cut-off valve or if it is desired to use one it can be of a simple design.
- An advantage of the invention is that there is no appreciable extra cost involved in the construction of a motor having a split rotor or two rotor parts independently driven of each other by a common stator winding.
- the stator has its usual or normal winding and the two rotors are mounted coaxially.
- a fluid-tight partition is disposed between the two rotors Within the stator and motor housing and defines a compartment in which the rotor driving the pump is disposed. Oil from the pump is delivered into this compartment during operation so that the rotor driving the pump is damped or braked so that the pump comes to a stop relatively quickly after the motor has been switched off.
- This type of construction avoids the need of a stuing box between the pump and the oil-filled compartment of the motor so that the pump shaft rotates with considerably less friction. The reduced friction increases performance characteristics which readily make up for the losses caused by the damping oil in the oil-filled compartment. Moreover, the oil in this compartment effects cooling of the stator and the rotor within the compartment.
- the partition within the stator consists of a cup-shaped member in which the rotor part that drives the blower is enclosed.
- the bottom of the cup-shaped member forms a partition defining with the stator and housing a compartment which is oil-filled and in which the stator and the rotor for the pump are disposed internally of the motor housing.
- cup-shaped member is disposed with the mouth or opened end thereof circumferentially of a bearing -for the blower rotor and has a rim on its mouth abutting against an end wall of a part of the motor housing.
- a simple seal between the inner circumference of the cup-shaped member and the outer periphery of the bearing suffices to seal the blower rotor internally thereof and define a fluid-type compartment for the remainder of the motor and in which oil can be provided from the pump and returned thereo. The oil within the oil-filled compartment assists in applying pressure to the cup-shaped member tending to hold it in position.
- the oil-filled compartment in the motor is delivered from the pressure side of the pump through a pressure-regulating valve and/or cut-off valve.
- the cut-off valve employed in conjunction with the invention comprises a spring-loaded pressed regulator valve of known type having an extension which directly 3 closes the nozzle or burner supply line.
- Other known pressure-regulating valves can perform the cut-olf function.
- the motor and pump construction is such that the motor shaft connected to one of the rotors constitutes the pump shaft and has a bearing insert for the pump rotor of a diameter that is equal to or greater than that of the rotor itself.
- the pump shaft bearing also acts as a bearing for the rotor and the rotor is mounted on an extension of the pump shaft, e.g. by being shrunk thereon or mechanically secured in some other way. The pump and its associated rotor parts can thus be replaced as a unit.
- FIG. 1 is an elevation sectional View of a motor drive for the oil burner system in accordance with the invention
- FIG. 2 is a diagram o f an oil burner system according to the invention.
- FIG. 3 is a fragmentary section view of a pressure-regulating and cut-off valve used in an oil burner system in accordance with the invention.
- FIG. l a motor drive for an oil burner system as hereinafter constructed is shown in FIG. l and comprises a stator l1 with a winding 2 held in two half-shells 3, -4 of a motor housing.
- a stator l1 Within the stator is mounted for rotation a first rotor or rotor part ⁇ 5 driving a shaft 6 which rotationally drives an air blower 7.
- a second rotor or rotor part 8 independent of the other rotor is mounted coaxially with the other rotor and rotatably drives a shaft 9 connected to a pump 10.
- the shaft 6 is mounted coaxial with a bearing bushing 11 and extends through an end wall of the half-shell 3 of the housing.
- the shaft 6 is secured against axial displacement by means of a locking device 12.
- the pump shaft 9 is mounted in two bearing bushings 13, 14 coaxially disposed in a pump housing 15 which is secured in a central opening in the housing half-shell 4 by a ring 16 and circumferentially
- the two rotor parts 5, 8 are separated from each other by a fluid-tight partition 18.
- the partition is part of a cupshaped member 19 having the walls of the cup part of the member bear against the stator 1 and the inner surfaces about the mouth of the cup-shaped member bear against the circumference of an annular part 21 of the housing.
- This housing part has an annular recess in which is disposed a seal ring 20 effecting a seal between the inner surfaces of the mouth of the cup-shaped member and the portion 21 of the housing.
- an oil chamber or compartment 22 is dened by the parts 3, 4, 15, 16 and 19.
- This compartment or chamber is oil-filled during operation as hereinafter explained.
- the overall burner nozzle system is illustrated diagrammatically in FIG. 2.
- the pump 10 is connected to a suction line 23 which takes a suction from an oil sump 24 and delivers it to a pressure discharge line or passage 25 to a valve arrangement 26 which comprises a pressureregulating valve and a cut-olf valve hereinafter described.
- a valve arrangement 26 which comprises a pressureregulating valve and a cut-olf valve hereinafter described.
- the excess oil which is not required Hows through a return passage 28 in communication with the chamber 22 and back through an outlet to the sump 24 or to the suction side of the pump as illustrated.
- the pump housing 15 can, for example, house the valve system 26 and the passages, for example the passages 25 and 28.
- the construction of the motor-pump-blower unit shown in FIG. 1 is readily accomplished.
- the housing parts 3, 4 are mounted and connected to the stator 1.
- the shaft 6 together with its associated rotor 5 are moved axially through the right hand opening in the housing and are secured against axial displacement by means of the securing device 12.
- the cup-shaped member 19 is then inserted likewise from the righthand side and is disposed in the position illustrated in FIG. 2.
- the pump and rotor assembly unit consisting of the parts 8-10 and 15-16 and to tix them by means of the ring and screws 17.
- the pump housing -15 contains all of the necessary connecting passages or lines the oil chamber 22 is also connected into the oil recirculating circuit when this fitting in position takes place.
- Axially extending connecting passages, for example an axial passage 29 in the rotor part 8 provide for oil entering into the chamber reaching all the parts to be cooled.
- a pressure-regulating and cut-olf valve 36 may be mounted in the pump housing 15 for carrying out pressure regulation and cut-off of fuel oil supply to the nozzle 27 when the fuel oil pump is stopped.
- a bore 37 is provided in the housing 15 and has at one end thereof a threaded plug 38 which comprises a nozzle supply outlet 39 and a valve seat 40 for the cut-off valve.
- a threaded bushing hollow cap 41 At the other end of the valve bore is provided a threaded bushing hollow cap 41 having a closed end and movable axially to adjust a spring ⁇ 42 housed internally thereof.
- the spring biases valve element 43 of a pressure-regulating valve, which is axially guided in a bushing 44 acting in the manner of a guide slide, toward a seated position.
- the valve element y43 has an axial extension 45 which forms the cut-olf valve.
- a passageway 46 is in communication with the pressure line or passage 25 and another passage 47 corresponds to the return line or passage 28.
- a pump and blower system for oil burners in combination with a fuel oil nozzle, a fuel oil supply pump for the nozzle and a driven air-supply source supplying in operation air under pressure to effect combustion of fuel oil supplied by said nozzle, the improvement which comprises a motor for driving the oil pump and said air-supply source independently of each other, said motor having two independently driven rotors, for each rotor an independent shaft, said motor comprising a single stator for said two rotors, and means defining a compartment for receiving oil from said pump such that said stator is bathed by said oil and cooled thereby.
- said means defining said compartment comprises a cup-shaped member interiorly of said stator, and said rotor connected to said blower disposed interorly of said cup-shaped member.
- a bearing insert for one of said rotors said bearing insert having a diameter at least equal to a diameter corresponding with a diameter of said one of the rotors.
- said bearing insert comprises a bearing for said pump and said one rotor, and one of said shafts is connected to said rotor and comprises a pump shaft.
- valve means to cuto supply of fuel oil to said nozzle when said motor drive is deenergized and effective to continue to circulate fuel oil through said compartment when said supply of fuel oil to said nozzle is cut-off.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
- Air Supply (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Feeding And Controlling Fuel (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED0052327 | 1967-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3514241A true US3514241A (en) | 1970-05-26 |
Family
ID=7054087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US704677A Expired - Lifetime US3514241A (en) | 1967-02-18 | 1968-02-12 | Motor,pump,and blower system for oil burner |
Country Status (11)
Country | Link |
---|---|
US (1) | US3514241A (no) |
BE (1) | BE710146A (no) |
CH (1) | CH470591A (no) |
DE (1) | DE1551650B2 (no) |
DK (1) | DK116525B (no) |
ES (1) | ES350600A1 (no) |
FR (1) | FR1554376A (no) |
GB (1) | GB1167278A (no) |
NL (1) | NL6802170A (no) |
NO (1) | NO121170B (no) |
SE (1) | SE338392B (no) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1638188B1 (de) * | 1967-05-09 | 1971-05-06 | Danfoss As | Durch elektromotor angetriebene pumpe fuer oelbrenner |
DE1751388C2 (de) * | 1968-05-21 | 1975-06-19 | Danfoss A/S, Nordborg (Daenemark) | Motor mit Pumpe und Gebläse für Ölbrenner |
DE3049515A1 (de) * | 1980-12-30 | 1982-07-29 | Motan Gmbh, 7972 Isny | Brennerantrieb, insbesondere fuer hochdruckreiniger |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1780337A (en) * | 1928-12-31 | 1930-11-04 | Glacier Inc | Pumping mechanism |
US1985934A (en) * | 1933-02-10 | 1935-01-01 | Gilbert & Barker Mfg Co | Oil burner |
-
1967
- 1967-02-18 DE DE19671551650 patent/DE1551650B2/de active Pending
-
1968
- 1968-01-31 BE BE710146D patent/BE710146A/xx unknown
- 1968-02-02 GB GB5444/68A patent/GB1167278A/en not_active Expired
- 1968-02-05 CH CH182568A patent/CH470591A/de not_active IP Right Cessation
- 1968-02-12 US US704677A patent/US3514241A/en not_active Expired - Lifetime
- 1968-02-14 FR FR1554376D patent/FR1554376A/fr not_active Expired
- 1968-02-15 NL NL6802170A patent/NL6802170A/xx unknown
- 1968-02-15 NO NO0570/68A patent/NO121170B/no unknown
- 1968-02-15 DK DK59568AA patent/DK116525B/da unknown
- 1968-02-15 SE SE02015/68A patent/SE338392B/xx unknown
- 1968-02-17 ES ES350600A patent/ES350600A1/es not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1780337A (en) * | 1928-12-31 | 1930-11-04 | Glacier Inc | Pumping mechanism |
US1985934A (en) * | 1933-02-10 | 1935-01-01 | Gilbert & Barker Mfg Co | Oil burner |
Also Published As
Publication number | Publication date |
---|---|
FR1554376A (no) | 1969-01-17 |
ES350600A1 (es) | 1969-05-16 |
DE1551650A1 (de) | 1970-03-19 |
BE710146A (no) | 1968-05-30 |
DE1551650B2 (de) | 1971-12-30 |
CH470591A (de) | 1969-03-31 |
DK116525B (da) | 1970-01-19 |
NO121170B (no) | 1971-01-25 |
GB1167278A (en) | 1969-10-15 |
NL6802170A (no) | 1968-08-19 |
SE338392B (no) | 1971-09-06 |
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