US3865518A - Fuel-oil pump for one and two line operation - Google Patents

Fuel-oil pump for one and two line operation Download PDF

Info

Publication number
US3865518A
US3865518A US119144A US11914471A US3865518A US 3865518 A US3865518 A US 3865518A US 119144 A US119144 A US 119144A US 11914471 A US11914471 A US 11914471A US 3865518 A US3865518 A US 3865518A
Authority
US
United States
Prior art keywords
line operation
pump
fluid communication
oil pump
passage
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
US119144A
Other languages
English (en)
Inventor
Kyrre G Sjotun
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.)
Danfoss AS
Original Assignee
Danfoss AS
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
Priority claimed from DE19702008510 external-priority patent/DE2008510C/de
Application filed by Danfoss AS filed Critical Danfoss AS
Application granted granted Critical
Publication of US3865518A publication Critical patent/US3865518A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F23K5/04—Feeding or distributing systems using pumps
    • 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
    • F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
    • F23D11/26—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed
    • F23D11/28—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed with flow-back of fuel at the burner, e.g. using by-pass
    • 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

Definitions

  • ABSTRACT The invention relates to a fuel oil pump which is adaptable for single or double line operation.
  • the exhaust from the conventional pressure regulating valve is optionally directed to the pump intake for single line operation or back to the sump for two line operation.
  • the pump casing is provided with a planar surface having ports which have respective fluid communication with the exhaust from the pressure regulating valve, the pump intake passage, and the exhaust passage which leads to the sump.
  • a rotatable valve is mounted on the planar surface and a sealing washer forming a part of the valve has an arcuately shaped recess whereby selective fluid communication may be provided between selected ports in the planar surface to provide single or double line operation.
  • the invention relates to a fuel-oil pump for one and two line operation and in which the returned oil is passed from a return chamber optionally to the intake side (single-line operation) or to the discharge port (two line operation) of the pump.
  • Fuel-oil pumps must discharge the delivered oil at a certain pressure. Ths is done by delivering an excess amount of oil and by a pressure-regulating valve returning part of the oil directly to the pump or by way of the stuffing box.
  • Ths is done by delivering an excess amount of oil and by a pressure-regulating valve returning part of the oil directly to the pump or by way of the stuffing box.
  • the returned oil In single-line operation when an oil tank that is generally located above the pump is used, there is only one pipe between the tank and the suction side connecting port of the pump; here, the returned oil must be passed directly to the intake side of the pump.
  • two-line operation in which the tank is generally located below the pump, there are two pipes between the tank and the pump, namely one pipe leading to the intake side port and one leading to a discharge port; the returned oil is passed to the tank by way of the discharge port.
  • fuel-oil pumps of this kind are suitable both for single-line operation and for two-line operation.
  • the return chamber directly adjoins the discharge port, and an additional passage extends in the interior of the housing from the return chamber to the intake side.
  • the discharge port is closed by a screw
  • the additional passage is closed by a screw. If, in single-line operation, the screw remains in the connecting passage or if, in twoline operation, it is not present in the connecting passage, the pump either functins incorrectly or not at all. Since, after the pump has been connected, the screw is no longer visible in the additional passage, there is no simple way of checking. Furthermore, it is not particularly simple to switch over from the one type of operation to the other with the help of the screws.
  • the object of the invention is to provide a fuel oil pump of the initially described kind in which the change over from single-line to two-line operation and vice versa is very simple, and in which it is possible to know at any time what type of operation it is to which the pump has been set.
  • this object is achieved by means of passages which communicate with the return chamber, the intake side and the discharge port and which terminate at a common outer face of the pump housing, and by covering this face with a displaceable plate containing at least one connecting passage, in such manner that in a first position of the plate the intake side passage is connected to a return passage, and in a second position the discharge passage is connected with a return passage.
  • the pump is thus changed over from one type of operation to the other by displacing the plate.
  • the plate covers the mouths of the various passages; two selected mouths can only be interconnected with the help of the connecting passage.
  • the position of the plate is a ready indication of the kind of operation to which the pump has been set.
  • the plate is mounted to rotate and is provided with an arcuate connecting passage, and if the mouths of the passages are disposed along an arc.
  • the oil pump can then be changed over from one type of operation to another by a simple rotary movement.
  • a single screw at the center of the plate suffices to secure it.
  • the plate and the housing can carry markings on the exterior that indicate the kind of operation to which the pump has been set.
  • the plate then also acts as an indicating scale.
  • the plate is provided with a disc seal, and the connecting passage is formed in this seal.
  • the change-over device of the invention involves virtually no extra cost.
  • FIG. 1 shows the circuit diagram of a fuel-oil pump which can be switched from single-line to two-line operation
  • FIG. 2 is a schematic section on the line AA of FIG. 3 through those parts of a fuel-oil pump of importance to the invention
  • FIG. 3 is a plan view of the pump of FIG. 2 in the position for single-line operation
  • FIG. 4 is a plan view of the pump of FIG. 2 in the position for two-line operation.
  • a pump housing 1 accommodates a geared pump 2.
  • the intake side 3 of the pump communicates with a connecting port 4 to which an intake pipe 6 running from the tank 5 is connected.
  • the pressure side 7 of the pump leads by way of a cut-off valve 8 to a port 9 to which can be connected a nozzle 10.
  • a pressure-regulating valve 11 which keeps the pressure constant and returns surplus oil by way of a return chamber 12.
  • the oil is passed by way of a connecting passage 13 to a discharge port 14 which communicates with the tank by way of a discharge pipe 15.
  • the discharge port 14 is closed and a connecting passage along the broken line between the return chamber 12 and the intake side 3 is established.
  • the housing 1 has an end face 16 against which a plate is pressed with the help of a central screw-bolt 18, a sealing washer 19 being fitted between said end face and the plate.
  • the plate 17 seals off an intake chamber 20 which together with the intake-side connecting port 4 constitutes the intake side 3.
  • an intake side passage 21 runs from the port 4, a discharge passage 22 from the discharge port 14 and two return passages 23 from the return chamber 12 which is constituted by a bored hole.
  • the mouths of these passages are disposed along an arc.
  • a connecting passage 24, which extends over not quite is provided in the sealing washer 19.
  • the plate 17 For single-line operation, the plate 17 must be turned so that the arrow 26 points to the mark 25.
  • the passage 24 in the seal 19 then connects a return passage 23 with the intake side passage 21.
  • the returned oil contained in the chamber 12 therefore passes to the intake side 3 of the pump.
  • the discharge port 14 can here be closed by means of a screw 28. It is however also sufficient for the seal to close the associated mouth 22 of the discharge passage.
  • the plate 17 is turned to cause the arrow 27 to point to the mark 25.
  • the connection between the return chamber 12 and the intake side is then interrupted, and the connecting passage 24 establishes connection between the return chamber 23 and the discharge passage 22. Returning oil can therefore travel back to the tank by way of the discharge port 14 to which is fitted the discharge pipe 15.
  • a fuel oil pump for single and double line operation comprising a casing, said casing defining a return passage, said casing defining intake and discharge passages, said casing having a planar external surface, first port means in said surface having fluid communication with said return passage, second and third port means in said surface having respective fluid communication with said intake and discharge passages, valve means cooperable with said port means, said valve means having a first position providing fluid communication between said first and second port means and a second position providing fluid communication between said first and third port means.
  • valve means includes a sealing washer, said recess being in said washer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US119144A 1970-02-24 1971-02-26 Fuel-oil pump for one and two line operation Expired - Lifetime US3865518A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702008510 DE2008510C (de) 1970-02-24 Heizölpumpe für Ein- und Zweistrangbetrieb

Publications (1)

Publication Number Publication Date
US3865518A true US3865518A (en) 1975-02-11

Family

ID=5763204

Family Applications (1)

Application Number Title Priority Date Filing Date
US119144A Expired - Lifetime US3865518A (en) 1970-02-24 1971-02-26 Fuel-oil pump for one and two line operation

Country Status (7)

Country Link
US (1) US3865518A (OSRAM)
CH (1) CH525394A (OSRAM)
DK (1) DK123118B (OSRAM)
FR (1) FR2079038A5 (OSRAM)
GB (1) GB1351514A (OSRAM)
NL (1) NL7101767A (OSRAM)
SE (1) SE357044B (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775300A (en) * 1987-03-20 1988-10-04 Danfoss A/S Heating oil pump for selective single or double line operation
DE4401074A1 (de) * 1994-01-15 1995-07-20 Elasis Sistema Ricerca Fiat Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
EP0711955A3 (de) * 1994-11-14 1998-03-04 HANS G. WERNER GmbH & CO. Saug- und Druckaggregat

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209856A (en) * 1939-03-04 1940-07-30 Cleveland Steel Products Corp Fuel supply pump
US2918009A (en) * 1957-02-01 1959-12-22 Dieny & Lucas Soc Nouv Injection-compressor apparatus
US3162129A (en) * 1962-07-13 1964-12-22 Sundstrand Corp Two-stage fuel unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209856A (en) * 1939-03-04 1940-07-30 Cleveland Steel Products Corp Fuel supply pump
US2918009A (en) * 1957-02-01 1959-12-22 Dieny & Lucas Soc Nouv Injection-compressor apparatus
US3162129A (en) * 1962-07-13 1964-12-22 Sundstrand Corp Two-stage fuel unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775300A (en) * 1987-03-20 1988-10-04 Danfoss A/S Heating oil pump for selective single or double line operation
DE4401074A1 (de) * 1994-01-15 1995-07-20 Elasis Sistema Ricerca Fiat Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
US5571243A (en) * 1994-01-15 1996-11-05 Elasis Sistema Ricerca Fiat Nel Mezzogiorno Societa Consortile Per Azioni Pump device for supplying fuel from a tank to an internal combustion engine
DE4401074B4 (de) * 1994-01-15 2007-01-18 Robert Bosch Gmbh Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
EP0711955A3 (de) * 1994-11-14 1998-03-04 HANS G. WERNER GmbH & CO. Saug- und Druckaggregat

Also Published As

Publication number Publication date
FR2079038A5 (OSRAM) 1971-11-05
DK123118B (da) 1972-05-15
DE2008510A1 (de) 1971-09-09
NL7101767A (OSRAM) 1971-08-26
SE357044B (OSRAM) 1973-06-12
GB1351514A (en) 1974-05-01
CH525394A (de) 1972-07-15
DE2008510B2 (de) 1972-03-16

Similar Documents

Publication Publication Date Title
US4728260A (en) Direction-selectable sending-out pump
GB1171563A (en) Improvements in or relating to Hydrostatic Devices
US2456651A (en) Tank unit with submerged valve and external pump
GB1027587A (en) Improvements in or relating to rotary positive displacement hydraulic pumps
US2107152A (en) Reversible fuel pump
GB1373902A (en) Hydraulic system for a vehicle having a steering system and air conditioning unit
US4373871A (en) Compact power steering pump
GB1336344A (en) Positive displacement pump
US3865518A (en) Fuel-oil pump for one and two line operation
GB1389887A (en) Positive displacement pumps
GB1449660A (en) Vehicular power steering systems
US2781726A (en) Reversible fuel pump for oil burners
GB1328728A (en) Rotary positive displacement pump
US3584985A (en) Hydrostatic control equipment particularly for steering systems
GB1347611A (en) Fluid pump
JPS56104186A (en) Flow controller for power steering working fluid
US2651994A (en) Variable capacity pump with dual discharge means
US5018947A (en) Screw type vacuum pump
US1732871A (en) Rotary machine
GB1533527A (en) Radial piston multiple pump
USRE27241E (en) Porting for balanced hydraulic roller pump
US3478693A (en) Lobe gear pump
US3617155A (en) Oil-pump with a pressure-regulating valve connected on the outlet side
US4176548A (en) Hydrostatic torque measuring device for rotating shafts
GB1387950A (en) Multi-way valve