US1600507A - Feed-valve mechanism for oil burners - Google Patents

Description

sept. 21,1926. A A 1,600,507

E. MARR l'FFED vALvE uEcHANsu ,Fon on. unuans Filed August 5, 1925 Patented Sept. 21, 1926.

l .UNITED STATES A, 1,600,507 Param ori-fics.

EARL MARR, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR'TOMARR OIL HEAT MACHINE A CORPORATION, OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF MINNESOTA. -1

FEED-VALVE MECHANISM FOR OIL BURNERS.

Application filed August 3, 1925. Serial No. 47,776. Y

My invention provides an improved feed valve mechanism especially adapted for use in connection with oil burners wherein a fan or blower vand an oil pump are used to produce forced feed of air and oil. Generally stated, the invention consists of the novel devices, combinations of devices and arrangement of parts hereinafter described and defined in the claims.

It has been a difficult matter to provide a satisfactory oil or fluid fuel feeding depassage that such small impurities contained in the oil or fluid fuel. If larger feed passages be provided and left constantly open, then the supply of oil could not be cut down to the required small flow. I have, however, provided a valve mechanism wherein *relatively large ports may be used and these ports brought into registration intermittently and'for only a portion of the time, but in such rapid succession that the flow of oil to the burner, for all intents and purposes, would be substantially continuous.

f A second feature of the invention resides u in the provision of a governor-controlled choke valve in the fuel or oil feed passage, the governor being driven by the same motor that drives the fan or blower and arranged to open the choke valve when the motor is in action, and to close the choke valve when the motor and In the accompanying drawings, which ili lustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a vertical-section taken axially through the improved feed valve mecha- Fig. 2 is section on the line 2 2 of' Figa 1;

the blower are idle or'stopped.

showing al Fig. 1, some parts being broken disposed cup-shaped shell 5. Said membersil' i and `are provided with axially aligned proJecting bearing hubs 6 and 7, respectiveily.l As shown in Fig. V1, the flanged base of the head his secured to 'a casting or Vsupport18, the nature of which, for the purpose of this case, need not be considered. The

bearing hub 6 is madehollow'to afford an.

oil-receiving chamber 9, and the oil under pressure is fed into this chamber 9 throughv an oil pipe 10. Rigidly secured to the inner face of the head plate 4 is a disc-like valve seat 11 provided with achub that is axially aligned with the hub-,6. A motor or power-driven shaft 12, which, in practice. 'will be arranged to be rotated when the fany or blower (not shown) vof the burner is in action, is` extended through and j'ournaled in the hub 6 and in the hub of the valve seat 11. Keyed to rotate with the shaft 12 but capable of slight axial movementA is a rotary disc-like feed valve 13, the face of which works in close contact against the face of the fixed valve seat 11. In the arrangement shown, the valve13 is pressed against its seat by' a coiled spring 14 placed around the shaft 12 and reacting against the hub of lsaid valve and against a collar 15 fixed to said shaft. The valve 13 is provided with a port 16 oifset'froin its axis andarranged to register in ksuccession with circumferentially spaced ports 17 formed in the valve seat11. These ports 17 mayy vary in number, but, as shown, they are located in substantially diainetrically opposite groups, the 'one group consisting of three ports land the other of four ports; .Vorking against the inner face of the valve seat 11 is arotatively adjustable port cut-oft plate 18 of annular form,

rotatively mounted onthe hub ofvsaid valve 2 seat and,'as shown, providedwith diametrically opposite segmental slots 19. As shown the cut-off plate 18 is frictionally pressed against lthe valve seat 11k by a spider-like spring washer-2O that is seated yagainst a nut 21 threaded on the hub of said'valve,l

seat.. Thus, the rotativelyadjustable port 'cut-off .plate 18 will be friction'allyfheld in any position in which set.l To facilitate rotary adjustments of said plate 18, it is shown as vprovided witha notched rim22 that `may be reached by a pointed tool inserted through an yopening normally closed by a plug 23 applied to the shell 5. In the adjustment shown iii Fig. 2, only one Vof the evident, affords' means for greatly varying thefeed of oil. The rate of the Voil feed will not be varied to any perceptible extent per minute or any other unit of time by` the varying speed of thevshaft 12, for if the speed of said shaft be doubled, the interval of time during which the ports will register will be reduced to one-half, but the number of port registrations per minute or unit of time will be doubled. Hence, the rate of the oil feed may be very accurately controlled bya-djustments of the cut-off plate. TWhen only one port of the valve seat is opened by the cut-off plate, there will be a very small or slow feed of the oil or fluid fuel, even when the fuel feed ports of the valve mechanisinare made as Alarge as one-eighth of an inch or more iii diameter and, as is evident, ports of such size will not be clogged by anyimp'urities found in oil or fluid fuel.

Oil fed into the chamber 9 and through the ports of the valve mechanism just above described will enter the interior of the shell 5,V and forthe discharge thereof from said shell, the hub of said shell is provided with Y an axial discharge port 24 connected to an Voil delivery pipe 25.

Mounted on the reduced inner end of the shaft 12 for slight axial movements isa needle valve 26. Secured to the shaft 12 within the shell 5 is ay cup-shaped governor head'27 provided with internal lugs 28 to which are pivoted governor levers 29, the short inwardly projecting ends of which engage a shoulderBO on the needle valve 26. A coiled spring `31,

Y placed around the shaft 12, acts against the hub of the head 27 and against the valve 26 and causes said valve to close said port 24; wheithe shaft 12 is at rest. When the shaft 12 is rotated at the proper speed to operate the fan or blower, centrifugal force,

acting on the head ends of the levers 29,

will'overconie the spring 31 and move the needle valve 26 in a position to open the port 24 for maximum feeding capacity, so

that the vflow of oil will then be regulated i A'entirely by the feed valve mechanism already clearlyY described.- Theobvious purpose of this governor-actuated choke valve 26 is to positively 4cut olf 'the flow vor feed of the oil or fluid fuel whenever'the motorV and, hence, the fan or blower are stopped. This positively prevents flooding of a burnrer` .when the motor of the burner installation is y stopped.

N hat Il claim is l. ln a device of the kind described, a relatively fixed valve seat, a rotary `valve .cooperating therewith, said seat and valve liavine' ecceiitrically locatedports arranged to be intermittently brought into registration under rotation of said valve, and motoractuated means for rotating said valve.

2. A device of the kind described compris' a valve seat and a cooperating rotary valve, said valve and seat havingv flat engaging faces and formed with eccentrically l cated ports adapted to be brought into i'e. stration under rotation of said valve, the number of ports in one of the said meinbers being greater than the number of ports in the other member, and motor-actuated means foi' rotating said valve. c j

3. A device of the kind described comprisiiv^` a valve seat and a cooperating rotary valve, said valve and seat having flat engaging faces and formed with eccentrically located ports adapted to be brought'into registration under rotation' of said valve, the number of ports in said valve seat being greater than the number of ports in said valve, and motor-actuated means for rotating said valve.

11. The structure defined in'c'laim 2 in further combination with means for closing more or lessof saidzports to vary the flow.

5. A device ofthe kind Vdescribed comprising a valve seat and a cooperating rotary valvel said valve and seat having flat engaging facesiand formedwith eccentrically located ports adapted to be brought into registration under rotation of said valv-e,'the number of ports in lsaid valve seat being greater than the numberof ports in 'said valve, and ank adjustable port cut-off plate movable to open and close more or less of he ports of said valve seat. j j

6. In a device of the kind described, the combination with a relatively fixed valve seat, of a rotary valve workingon one side of said valve seat, and a choke plate rotatively adjustable on the other side of said valve seat, said valve seat, valve and cutoff plate having ports and said cutoff' plate being adjustable to vary the flow through .said ports when in registration.

.7. rlhe structure defined in claim 6 in further combination with a spring device for frictioiially holding said cut-off plate where set. f v

8. A fluid kow yfeeddevice comprising a relatively fixed disc-like. valve seat. a disclike rotary valve, and a rotatively adjustable cut-off-plate, said valve seat being between said valve and cut=o1i` plate, said three ele- 'ments having cooperating ports, and vsaid cut-off plate being adjustable to vary the i'ioi'v-oonducting capacity of said ports when iii registration. 'v Y 9. The combination with a container having inlet and discharge `ports for the circulation of a fluid therethrough, of a shaft extended into said container, a valve and a valve seat in said container having cooperating ports for controlling the How of fluid` cause the same to open to said discharge port When said shaft -is rotated.

10. The combination with a container having inlet and discharge ports for the circulation of Huid therethrough, a feed valve and a valve seat having co-operating ports controlling the extent of flow through said container, a choke valve for cutting oi and releasing the How through said container, a governor for actuating said choke valve, and means for simultaneously driving said governor and feed valve.

i 11. The combination with la container having inlet and discharge ports for the circulation of fluid therethrough, a feed valve and a valve seat, said valve and seat having co-operating eccentrically located ports controlling the extent of lovv. through said container but movable to release the flow, a centrifugal governor operative at a predetermined speed to move said` choke valve to an open position` and means for simultaneously rotating said governor and valve.

12. The combination With a container having inlet and discharge ports for the circulation of uid therethrough` driven flow-controlling means primarily controlling the flow through said container when in action, a choke valve for cutting off and releasing the How though said container, a governor for actuating said choke valve, and :means for simultaneously driving said governor and flow-controlling means.

In testimony whereof I aHiX my signature.

EARL MARR.

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