EP0042900B1 - Zuführvorrichtung eines Brenners für flüssigen Brennstoff - Google Patents

Zuführvorrichtung eines Brenners für flüssigen Brennstoff Download PDF

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Publication number
EP0042900B1
EP0042900B1 EP80400992A EP80400992A EP0042900B1 EP 0042900 B1 EP0042900 B1 EP 0042900B1 EP 80400992 A EP80400992 A EP 80400992A EP 80400992 A EP80400992 A EP 80400992A EP 0042900 B1 EP0042900 B1 EP 0042900B1
Authority
EP
European Patent Office
Prior art keywords
piston
housing
fact
motor
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
Application number
EP80400992A
Other languages
English (en)
French (fr)
Other versions
EP0042900A1 (de
Inventor
Philippe Jean Maurice Lecerf
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.)
CESSIONE;COMPAGNIE GENERALE DUCUAUFFAGE S.A.
Original Assignee
Societe Generale de Fonderie SA
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 Societe Generale de Fonderie SA filed Critical Societe Generale de Fonderie SA
Priority to EP80400992A priority Critical patent/EP0042900B1/de
Priority to DE8080400992T priority patent/DE3069285D1/de
Priority to AT80400992T priority patent/ATE9609T1/de
Publication of EP0042900A1 publication Critical patent/EP0042900A1/de
Application granted granted Critical
Publication of EP0042900B1 publication Critical patent/EP0042900B1/de
Expired legal-status Critical Current

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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
    • F23K5/14—Details thereof
    • F23K5/142—Fuel pumps
    • F23K5/145—Fuel pumps combined with fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
    • F04B7/06—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports the pistons and cylinders being relatively reciprocated and rotated

Definitions

  • the present invention relates to a device which applies in particular to the supply of fuel to burners for domestic boilers.
  • axial piston pumps capable of providing low flow rates proportional to the speed of rotation. Because the axial translation of the piston must be controlled by an additional rotary piston or, in the case where the axial piston is driven by a combined movement of translation and rotation, by gears with long teeth, the known pumps are complicated , expensive and not easy to dismantle.
  • Liquid supply devices comprising a rotary piston pump provided with a light and housed in a sealed manner in a casing itself provided with a suction port and a discharge port capable of communicate periodically and alternately during the rotation of the piston with the light thereof, and a cam mechanism interposed between the housing and the rotary piston, and defining within the housing a cavity of variable volume communicating with the light of the piston , as well as a motor to drive the piston in rotation.
  • the invention relates to a device for supplying a burner with liquid fuel comprising a pump of simple, light and inexpensive design, well suited to low liquid flow rates.
  • the proposed device comprises a rotary piston pump of the aforementioned type.
  • the piston consists of the motor shaft, on which the housing is slidably mounted, while being elastically urged towards the motor shaft by a weak return spring, while hoses connect the orifices of suction and discharge of the casing, substantially immobilized in rotation, at the fixed parts.
  • the invention is correlative to the fact that, for this pump intended to operate at low pressures, it suffices to use an extremely light casing; this therefore generates low axial dynamic forces, and can be associated with a weak return spring, so that the dynamic and return forces remain without undesirable repercussions on the cam mechanism and on the rotary piston.
  • the mobile casing is easily removable to allow control or replacement of the cam mechanism. In addition, it facilitates rapid stopping of the pump.
  • the cam mechanism can advantageously be formed by machining the end of the motor shaft.
  • the pump according to the invention thus took advantage of the excellent tolerances of the drive shafts.
  • the cam mechanism may include a stop associated with the piston and a cooperating cam surface associated with the housing.
  • the movable casing of the pump can be made of a metallic material or preferably plastic. It may have a tapered configuration on the side of the rotary piston so as to have a thinned end, endowed with radial elasticity, if necessary carrying an annular necking piece, and capable of causing the sealed application of said end on the piston. .
  • the sealing thus produced in a simple manner makes it possible to further reduce the weight of the casing and correspondingly to reduce the force of the return spring or to increase the stroke of the casing and consequently the flow rate of the pump.
  • the radial elasticity of the end of the casing allows it to self-center more easily on the motor shaft.
  • the pump drive motor can be of the type with axial translation of the rotor when starting and stopping, which allows a frank operation and interruption of pumping without the need for a special solenoid valve.
  • the fan can produce on the shaft at start and stop an axial thrust sufficient to produce a decoupling translation of the piston relative to the casing.
  • the low-flow pump of the device for supplying liquid fuel comprises a casing 10 disposed axially movable on a rotary piston 20.
  • the casing 10 has a cylindrical cavity 10a open on the left and closed on the right on a blind bottom 10b.
  • the blind bottom is equipped with a flow adjustment piece, for example an eccentric screw 13 which is mounted in leaktight manner and which bears offset at its end situated in the cavity 10 has a support, for example constituted by a ball joint ball 14.
  • a flow adjustment piece for example an eccentric screw 13 which is mounted in leaktight manner and which bears offset at its end situated in the cavity 10 has a support, for example constituted by a ball joint ball 14.
  • the casing cooperates by its bottom 10b with a helical or conical return spring 15, producing a relatively weak axial effect.
  • the suction and discharge conduits 11a, 12a connected to the orifices 11, 12, are constituted by hoses preventing any significant rotation of the casing while, in addition to its return function, the spring 15 contributes to preventing such rotation due to the fact that one of its ends 15a associated with the casing is immobilized by abutment or embedding on the bottom 10b while its other end 15b is associated with an element 16 of the frame of the device.
  • the spring can be constituted by a leaf spring or an elastomer support element.
  • the casing 10 is slidably and sealingly mounted on the rotary piston 20.
  • the sealing is carried out by means of an elastomeric lip seal with radial contact 19 or with tangential contact of a type customary for shaft seals rotating or by means of an O-ring supporting the inner ring in "Teflon".
  • the rotary piston 20 is directly machined on the shaft of an electric motor 27 driving on the side opposite the pump a fan 40 for supplying combustion air.
  • the head 21 of the piston 20 has a lumen 22 in the form of a ring segment of less than 180 ° and an oblique face 23 forming a cam surface inclined at an angle a on a plane perpendicular to the axis of rotation of the piston.
  • the ball 14 of the adjustable stop 13 normally comes to bear on the cam surface 23 under the effect of the return spring 15.
  • the pump illustrated in Figures 1 and 2 operates as follows.
  • the chamber 25 defined between the housing and the piston has its maximum volume; the rotation of the piston in the direction indicated cuts the communication between the light 22 and the suction port 11 and prepares to open the communication between the light and the discharge port 12 (FIG. 1A), while the surface cam tends to cause the translation of the housing 10 to its position of Figure 2.
  • the chamber 25 takes its minimum volume and the communication between the light 22 and the orifice 12 is cut ( Figure 2A).
  • the piston continues to rotate, the light is again open on the orifice 11 and the fuel is sucked into the chamber 25 until one returns to the position of FIG. 1.
  • Figures 3 and 3A show how the screw 13 and the ball 14 allow manual adjustment of the flow rate.
  • the ball 14 is applied to the cam surface 23 at a point defining a maximum stroke C1 between the housing 10 and the piston 20; in the position of Figure 3A which is obtained by simple rotation of a half-turn of the screw 13, the ball 14 is applied to the surface 23 at a point defining a course C2 much shorter.
  • the stop contact remains effective between the ball 14 and the surface 23 regardless of the adjustment position.
  • FIGS. 4 and 4A show a supply device with operation and frank interruption of the pumping so as to avoid the dripping of the fuel out of the spraying member between the moment when the stop order is given to the engine and the moment when the rotor 29 of the motor 27 stops definitively.
  • the motor comprises a stator 28 and the motor shaft comprises on the side opposite the pump two shoulders 30, 31 for limiting the stroke cooperating with a stop 32 integral with the frame.
  • a spring 35 mounted between a stop 33 and the drive shaft or the rotor 29 urges the shoulder 31 at rest against a stop 32 ( Figure 4) so that the rotor 29 is offset axially relative to the stator 28.
  • a shoulder 10c of the casing 10 of the pump is applied at rest by the return spring 15 against a stop 18 secured to the stator ( Figure 4) or to the frame ( Figure 4A). It goes without saying that the stops described, in particular the stop 18, can be axially adjustable.
  • the axial translation of the rotor when starting and stopping is obtained by means of the fan 40 by the simple use of the axial force of aeraulic origin exerted on the blades and therefore on the fan shaft.
  • the cam surface 23 or 42a can be of treated steel.
  • the ball may be a steel ball 14 or 43 trapped in a cell of its support so as to be able to pivot freely and / or provided with a flat wear area so as to avoid punctual contact.
  • the ball can also be simply crimped onto the end of the screw 13 or of an equivalent adjustment part or even onto the blind bottom of the casing.
  • FIGS. 5 and 5A comprises a washer 42, one face 42b of which is in abutment against a ball 43 crimped or pivotally mounted in the end of the rotary piston 20.
  • the other face of the washer is in abutment against two stops associated with the blind bottom of the casing; one of the stops 41 constitutes the adjustable stop which makes it possible to vary by action on the screw 13 the angle of inclination a 'of the face 42a relative to the axis of the piston 20; the other stop 44 serves as a point or preferably linear support in order to define for the washer a pivot axis contained in a plane perpendicular to the piston axis.
  • the wall of the casing is thinned at 10c on the side of the motor 27 so as to provide at the end of the casing an elastic annular zone 10d applied with self-centering on the piston 20.
  • a clamping ring 50 possibly retained by a stop 51.
  • the ring 50 tightly seals the area 10d of the housing on the piston 20.
  • the housing thus lightened makes it possible to use an even weaker spring 15 or, for the same spring, to increase the useful axial stroke.
  • a seal 52 is associated with the adjustable stop screw or finger 13.
  • the radial elasticity of the zone 10d is sufficient to produce the desired seal by pinching the piston 20 and the constriction means 50 can therefore be eliminated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Feeding And Controlling Fuel (AREA)

Claims (9)

1. Vorrichtung zur Zuführung von flüssigem Brennstoff zu einem Brenner, enthaltend eine Pumpe mit Drehkolben (20), der mit einem Spülschlitz (22) ausgestattet und abgedichtet in einem Gehäuse (10) angeordnet ist, welches mit einer Ansaugöffnung (11) und mit einer Stauöffnung (12) versehen, ist, die periodisch und alternativ während der Rotation des Kolbens mit dessen Spülschlitz in Verbindung treten können, sowie einen zwischen dem Gehäuse (10) und dem Drehkolben (20) angeordneten Nockenmechanismus (13,14, 23), welcher im Innern des Gehäuses (10) einen variablen Hohlraum begrenzt, der mit dem Spülschlitz des Kolbens in Verbindung steht, ferner enthaltend einen Motor (27) zum Antreiben des Drehkolbens, dadurch gekennzeichnet, daß der Kolben (20) Bestandteil der Motorantriebswelle ist, auf welcher das Gehäuse (10) gleitend montiert ist, wobei es elastisch gegen die Motorwelle (20) mittels einer schwachen Rückholfeder (15) gedrückt wird, und wobei biegsame Schläuche (11a, 12a) die Ansaug- und die Stauöffnung des Gehäuses, weitgehend gegen Rotation immobilisiert, mit den festen Bauteilen verbinden.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Nockenmechanismus (13, 14, 23 ; 43, 42, 41) zum Teil durch spanabhebende Verformung (23, 43) des Endes der Motorwelle hergestellt worden ist.
3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Immobilisierung des Gehäuses gegen Rotation im wesentlichen durch die biegsamen Schläuche (11a, 12a) bewerkstelligt wird.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Nockenmechanismus einen mit dem Kolben assoziierten Anschlag (43) und eine damit zusammenarbeitende, mit dem Gehäuse assoziierte Nockenfläche (42) aufweist.
5. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Nockenmechanismus einen mit dem Gehäuse assoziierten Anschlag (13, 14) und eine damit zusammenarbeitende, mit dem Kolben assoziierte Nockenfläche (23) aufweist.
6. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Nockenfläche (23 ; 43) schräg mit Bezug auf eine zur Rotationsachse des Kolbens senkrechte Ebene ist.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Motor (27) ein Elektromotor mit axialer Verlagerung des Rotors beim Anlaufen und Anhalten ist, wobei die axiale Verlagerung größer ist als der maximale Weg des Gehäuses, damit dessen Entkupplung von dem Kolben möglich ist.
8. Vorrichtung nach einem der Ansprüche 1 bis 7, enthaltend ein Gebläse für die Zuführung der Verbrennungsluft, das von der Welle des Motors (27) angetrieben wird, dadurch gekennzeichnet, daß das Gebläse für eine vorbestimmte Anzahl von Umdrehungen eine axiale Verschiebung der Welle des Motors erzeugt.
9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß sie ein Stopp-Magnetventil aufweist, das auf dem an die Stauöffnung der Pumpe angeschlossenen Stauschacht angeordnet ist, wobei durch das Schließen des Magentventils bei drehendem Motor in der Pumpenkammer ein Druck erzeugt wird, welcher unter der Druckwirkung der Rückholfeder eine Entkupplung des Gehäuses von dem Kolben bewirkt.
EP80400992A 1980-07-01 1980-07-01 Zuführvorrichtung eines Brenners für flüssigen Brennstoff Expired EP0042900B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP80400992A EP0042900B1 (de) 1980-07-01 1980-07-01 Zuführvorrichtung eines Brenners für flüssigen Brennstoff
DE8080400992T DE3069285D1 (en) 1980-07-01 1980-07-01 Device for feeding a liquid-fuel burner
AT80400992T ATE9609T1 (de) 1980-07-01 1980-07-01 Zufuehrvorrichtung eines brenners fuer fluessigen brennstoff.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80400992A EP0042900B1 (de) 1980-07-01 1980-07-01 Zuführvorrichtung eines Brenners für flüssigen Brennstoff

Publications (2)

Publication Number Publication Date
EP0042900A1 EP0042900A1 (de) 1982-01-06
EP0042900B1 true EP0042900B1 (de) 1984-09-26

Family

ID=8187381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400992A Expired EP0042900B1 (de) 1980-07-01 1980-07-01 Zuführvorrichtung eines Brenners für flüssigen Brennstoff

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EP (1) EP0042900B1 (de)
AT (1) ATE9609T1 (de)
DE (1) DE3069285D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9203378U1 (de) * 1992-03-13 1992-04-23 Dolmar GmbH, 2000 Hamburg Ölpumpe, insbesondere für eine Kettensäge
FR2882795B1 (fr) * 2005-03-01 2007-05-11 Baxi S A Sa Pompe et installation d'alimentation d'un dispositif consommateur de liquide au moyen d'une telle pompe
US11174852B2 (en) * 2018-07-20 2021-11-16 Becton, Dickinson And Company Reciprocating pump

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354980A (en) * 1944-02-01 1944-08-01 Arras Damiano Reciprocating pump
FR1058498A (fr) * 1952-06-18 1954-03-16 Pompe
US3083895A (en) * 1961-02-28 1963-04-02 Besly Welles Corp Compressor
FR1416519A (fr) * 1964-09-23 1965-11-05 Cem Comp Electro Mec Pompe à faible débit, du type à piston plongeur animé d'un mouvement de rotation
DE2327140A1 (de) * 1973-05-28 1974-12-19 Helmut John Verschieblicher rotationskolben fuer unterwasserpumpen, u.a
DE2362194A1 (de) * 1973-12-14 1975-06-26 Audi Nsu Auto Union Ag Schmiermitteldosierpumpe
US3914073A (en) * 1974-12-17 1975-10-21 Ralph L Fusco Printing ink pump
FR2344766A1 (fr) * 1976-03-15 1977-10-14 Bjoerklund Curt Arnold Soupape notamment destinee a etre montee dans une conduite d'huile entre une pompe et l'embout d'un bruleur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1510351A (fr) * 1966-02-25 1968-01-19 Stihl Maschf Andreas Pompe à huile

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354980A (en) * 1944-02-01 1944-08-01 Arras Damiano Reciprocating pump
FR1058498A (fr) * 1952-06-18 1954-03-16 Pompe
US3083895A (en) * 1961-02-28 1963-04-02 Besly Welles Corp Compressor
FR1416519A (fr) * 1964-09-23 1965-11-05 Cem Comp Electro Mec Pompe à faible débit, du type à piston plongeur animé d'un mouvement de rotation
DE2327140A1 (de) * 1973-05-28 1974-12-19 Helmut John Verschieblicher rotationskolben fuer unterwasserpumpen, u.a
DE2362194A1 (de) * 1973-12-14 1975-06-26 Audi Nsu Auto Union Ag Schmiermitteldosierpumpe
US3914073A (en) * 1974-12-17 1975-10-21 Ralph L Fusco Printing ink pump
FR2344766A1 (fr) * 1976-03-15 1977-10-14 Bjoerklund Curt Arnold Soupape notamment destinee a etre montee dans une conduite d'huile entre une pompe et l'embout d'un bruleur

Also Published As

Publication number Publication date
EP0042900A1 (de) 1982-01-06
DE3069285D1 (en) 1984-10-31
ATE9609T1 (de) 1984-10-15

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