CH357134A

CH357134A - Liquid fuel burner provided with a device for simultaneous control of air and fuel admission

Info

Publication number: CH357134A
Authority: CH
Inventors: Adrianoff Alexandre
Original assignee: Safmat S A R L
Priority date: 1959-01-17
Filing date: 1959-09-29
Publication date: 1961-09-30
Also published as: FR1236876A; DE1401157A1; BE574824A

Description

Brüleur ä combustible liquide muni d'un dispositif de commande simultanee d'admission d'air et de combustible La pr6sente Invention a pour objet un brüleur ä combustible liquide. Liquid fuel burner provided with a simultaneous air and fuel intake control device The subject of the present invention is a liquid fuel burner.

Dans les brüleurs connus ä ce jour 1e reglage du d6bit d'air comburant se fait, soit en agissant sur un clapet plac6 dann la tubulure de refoulement d'air sous Pression, soit sur un clapet ou un autre organe situ6 sur la tubulure ou 1'ouie d'aspiration ou encore sur un diaphragme plac6 soit sur 1'aspiration, soit sur 1e refoulement. Un tel r6glage d'air est malaisd et risque de ne pas etre adapt6 correctement au regime de la flamme. In the burners known to date, the combustion air flow rate is adjusted either by acting on a valve placed in the pressurized air discharge pipe, or on a valve or another device located on the pipe or 1 inlet or on a diaphragm placed either on the inlet or on the outlet. Such an air adjustment is cumbersome and runs the risk of not being correctly adapted to the flame regime.

0r, pour que 1e melange d'air comburant et de combustible se fasse intimement ä tour les r6gimes il est indispensable dune Part que les quantites d'air varient en rapport correct avee les debitsj de com- bustible et d'autre Part, que ce mdlange se fasse ä meme distance de 1'injecteur de combustible. However, in order for the mixture of combustion air and fuel to take place intimately at all speeds, it is essential on the one hand that the quantities of air vary in the correct ratio with the flow rates of fuel and on the other hand that this mixing takes place at the same distance from the fuel injector.

Le brüleur selon la presente Invention est muni d'un dispositif de commande siinultan6e dadmission d'air et de combustible. 11 est caracterise par un organe de manoeuvre rotatif qui commande la Posi tion axiale dune tige, laquelle presente un canal d'amenee du combustible aboutissant ä un gicleur et un conduit de retour de combustible en exces, abou- tigsant ä un dispositif de reglage du d6bit fix6 sur cette tige, celle-ei 6tant empechee de tourner et 6tant vissee dann ledit organe de commande qui comporte des moyens de butde commandant la tension d'un ressort dudit dispositif de r6glage, caract6rise en outre par 1e fait que la tige Porte egalement un 6cran pour regler 1e d6bit d'air en coopdrant avec 1e gueulard du brüleur. The burner according to the present invention is provided with a siinultan6e air and fuel admission control device. 11 is characterized by a rotary maneuvering member which controls the axial position of a rod, which has a fuel supply channel terminating in a nozzle and an excess fuel return duct terminating in a fuel adjustment device. flow fixed on this rod, the latter being prevented from rotating and being screwed into said control member which comprises means for controlling the tension of a spring of said adjustment device, further characterized by the fact that the rod also carries a screen to adjust the air flow by cooperating with the burner sleeve.

Le dessin annexd reprdsente une forme d'ex6eu- tion de 1'objet de 1'invention, donn6e ä titre d'exemple. L'unique figure de ce dessin correspond ä une cou'pe verticale axiale du brüleur. The attached drawing shows one form of embodiment of the object of the invention, given by way of example. The single figure in this drawing corresponds to an axial vertical section of the burner.

Le boitier de ce dernier ddsigne par 1 contient la roue 2 du ventilateur, entrainee par un moteur 61ectrique non repr6sent6, 3 6tant 1e gueulard du brüleur, de forme conique, emmanche dans 1e boitier. The casing of the latter denoted by 1 contains the wheel 2 of the fan, driven by an electric motor, not shown, 3 being the conical burner's mouthpiece, fitted into the casing.

L'injection du combustible, dans 1e cas pr6sent, du mazout,. se fait par la tige d'injection mobile 4 au moyen dune pompe ou d'un compresseur non repr6sente. The injection of fuel, in the present case, fuel oil,. is done by the movable injection rod 4 by means of a pump or a compressor not represented.

Cette tige 4 pr6sente ä son extremite post6rieure 5 un par de vis rapide 6, sur lequel est mont6 un vo- <RTI ID="0001.0273" WI="6" HE="4" LX="1133" LY="1679"> lant en forme de cloche. Ce volant est log6 dans une ouverture du boitier 1 coaxiale et oppos6e au gueulard 3. Les vis 8, fixees@ Jans ledit boitier et p6n6trant dans une rainure 9 du volant 7, empechent ce dernier de se ddplacer axialement, tout en lui permettant de tourner autour de son axe. Dans ce volant sont enfin viss & s des vis 10, dopt les axes s,ont rdpartis circon- f6rentiellement et en nombre suffisant pour que les extr6mitds libres int6rieures arrondier de ces vis agis- sent dans leur succession, comme une came-cloche de Profil variable. This rod 4 has at its rear end 5 a rapid screw 6, on which is mounted a vo- <RTI ID="0001.0273" WI="6" HE="4" LX="1133" LY="1679" > bell-shaped lant. This steering wheel is housed in an opening of the case 1 which is coaxial and opposite to the top 3. The screws 8, fixed @ Jans said case and penetrating into a groove 9 of the steering wheel 7, prevent the latter from moving axially, while allowing it to rotate around its axis. Screws 10 are finally screwed into this steering wheel, with the axes s distributed circumferentially and in sufficient number so that the rounded inner free ends of these screws act in succession, like a profile cam-bell. variable.

Sur la tige 4 est fix6e une soupape de reglage de Pression 11, d'un type courant, comportant entre autres un piston 12, soumis ä 1'action d'un ressort 13, susceptible d'etre plus ou moins comprimd par un poussoir 14 sur lequel agissent les vis 10 consti- tuant la came-cloche precitee. Le piston 12 Porte en outre un pointeau 15 destine ä obturer un orifice 16. On the rod 4 is fixed a pressure adjustment valve 11, of a common type, comprising among other things a piston 12, subjected to the action of a spring 13, capable of being more or less compressed by a pusher 14 on which act the screws 10 constituting the aforementioned cam-bell. The piston 12 also carries a needle 15 intended to close an orifice 16.

A la soupape 11 aboutit une tubulure 17 reliee par un tube flexible non repr6sent6 au tank d'alimen- tation en combustible. Passant par une fente 18 du boitier 1 en autorisant les ddplacements axiaux, cette tubulure 17 empeche 1'ensemble de la tige 4 et de la soupape 11 de tourner autour de Faxe de la tige. L'extremite libre de cette derniere Porte un gicleur 19, devant lequel est montd un 6cran faisant Office de turbulateur 20, rendu solidaire de la tige 4 par une barre 21 et un manchon 22. A pipe 17 leads to the valve 11, connected by a flexible tube, not shown, to the fuel supply tank. Passing through a slot 18 of the box 1 allowing axial displacements, this pipe 17 prevents the assembly of the rod 4 and the valve 11 from rotating around the axis of the rod. The free end of the latter carries a nozzle 19, in front of which is mounted a 6cran acting as a turbulator 20, secured to the rod 4 by a bar 21 and a sleeve 22.

Le brüleur ainsi construit fonctionne de la ma- niere suivante Le combustible liquide entre Jans la tige 4 par un orifice E et est amen6 au gicleur par un espace annulaire 23. Apres avoir pass6 par la chambre de turbulation du gicleur, urle Partie du combustible est injectee dans le foyer, tandis que 1e surplus revient ä, la soupape 11 par un conduit axial 24. La quan- tit6 de combustible inject6e est directement propor- tionnelle ä la Pression r6gnant dans 1e conduit de retour 24, cette Pression 6tant ä son tour fonction de la plus ou moins grande compression du ressort 13. The burner thus constructed operates in the following manner. The liquid fuel enters the rod 4 through an orifice E and is brought to the nozzle through an annular space 23. injected into the hearth, while the surplus returns to the valve 11 through an axial conduit 24. The quantity of fuel injected is directly proportional to the pressure prevailing in the return conduit 24, this pressure being in turn depending on the greater or lesser compression of the spring 13.

Par consdquent, en agissant sur 1e volant 7 an peut, par 1'intermediaire des vis 10, varier 1e d6bit de combustible par Fenfoncement plus ou moins grand du poussoir 14 agissant sur la compression du ressort 13. Consequently, by acting on the first flywheel 7 an can, through the intermediary of the screws 10, vary the first fuel flow by the greater or lesser depression of the pusher 14 acting on the compression of the spring 13.

Cette rotation du volant 7 provoquant, gräce au pas rapide 6, 1e ddplacement longitudinal simultane de Fensemble de la tige d'injection 4, elle fait varier la Position du turbulateur 20 ä 1'interieur du gueulard conique 3 et produit ainsi une variation de la section annulaire de Passage de Fair comburant et par cons6- quent du d6bit de cet air. _ Par 1a variation du Profil de la came-cloche for- m6e par les vis 10, il est fache de faire correspondre, pour chaque Position angulaire du volant 7, 1e d6bit de combustible et d'air comburant propre ä main- tenir toujours dans la Proportion voulue la quantit6 de ces deux fluides. D'autre Part, la variation de sec- tion de Passage d'air comburant se faisant ä Fendroit meine oü celui-ci se m61ange au combustible, il est facile de. maintenir la vitesse de Pair ä une valeur suffisante pour que la turbulence permette d'obtenir un mdlange Parfait air-combustible. La disposition axiale et concentr & des Organes permet enfin de realiser un brüleur peu encombrant et d'un maniement aise pour realiser les differentes allures de marche aux meilleures conditions de ren- dement, par la simple manoeuvre du volant ä main dispos6 en. bout d'axe du brüleur. This rotation of the flywheel 7 causing, thanks to the rapid pitch 6, the simultaneous longitudinal displacement of the assembly of the injection rod 4, it varies the position of the turbulator 20 inside the conical sleeve 3 and thus produces a variation of the annular cross-section of passage of combustion air and consequently of the flow rate of this air. By varying the profile of the bell-cam formed by the screws 10, it is difficult to match, for each angular position of the flywheel 7, the flow rate of fuel and combustion air suitable to always be maintained in the desired Proportion the quantity of these two fluids. On the other hand, the variation of combustion air passage section being made at the place even where it mixes with the fuel, it is easy to. maintain the air velocity at a value sufficient for the turbulence to obtain a perfect air-fuel mixture. The axial and concentrated arrangement of the Organs finally makes it possible to produce a burner which is compact and easy to handle in order to achieve the various running gaits under the best performance conditions, by the simple operation of the handwheel provided therein. shaft end of the burner.

Claims

CLAIM Liquid fuel burner fitted with a device for simultaneously controlling the admission of air and the fuel, characterized by a rotary control member which controls the axial position of a rod which has a fuel supply channel leading to a nozzle and an excess fuel return duct leading to a fixed flow rate adjustment device on this rod, the latter being RTI ID="0002.0269" WI="15" HE="4" LX="1117" LY="895 "> prevented from rotating and being screwed into said control member which comprises abutment means controlling the tension of a spring of said adjusting device, further characterized by the fact that the rod also carries a screen to adjust the first flow rate of air by co-operating with the burner sleeve. 1. Burner according to claim, characterized in that the stop means acting on an element compressing the first spring; are arranged around an axis common to the operating member, to the fuel supply rod and to the screen. . z. Burner according to claim and sub-claim 1, characterized in that the operating member is axially held on the burner casing by screws engaging radially in a circular groove of said member. 3. Burner according to claim and sub-claims 1 and 2, characterized by a 61ement integral with the supply rod engages Jans a longitudinal groove of the housing of the burner so as to allow an axial displacement of this rod while opposing its rotation.