US1830186A - Oil burner - Google Patents

Description

Nov. 3, 1931. H. BARLEY OIL BURNER Filed July 17, 1930 2 Sheets-Shet 1 INVENTOR.

HARRY BARLEY BY ATTORNEY.

H. BARLEY OOO OOOO ER lWl/ll m joints the hi h spee amiss Nov. 3, i931 PATENT QFFICE BABLEY, OF SAN- FRANCISOO, CALHOBRIA on. Bum

Application filed July 17,1980. Serial Ho. 488,519.

This invention relates to improvements 111 oil burners and more particularly to motor driven oil burners.

Among-the objects of the inventlon is to so a combine and arrange the oil ressure and motor system that external lea age of 011 IS avoided in the burner feed system.

Another object is to eliminate compression stufling boxes and glands where the 011 feed d shaft of the centrlfugal fan for mec amcally vaporizing the fuel.

A further object is to insure an initial feed of fuel oil when the motor starts and to maintain a constant and uniform presure on the oil fuel adjacent the burner. Other objects and advantages will appear as the description progresses.

In this specification and the accompanying drawings the invention is disclosed in its preferred form. But it is to be understood that it is not limited to this form, because 1t ma be embodied in other forms. It is also to e understood that in and by the claims following the description it is desired to cover 2 the invention in whatsoever form it may be embodied.

In the two sheets of drawings:

Fig. 1 is a side elevation, part1 in cross section, of an oil burner having t s invention combined therewith, diagrammatically illustrating the supplementary fuel pressure system.

Fig. 2 is an enlarged side elevation, partly in vertical section, of the shaft packing assembly.

Fig. 3 is a further enlarged fragmentary detail showing in vertical section the helical fuel return groove in the packing gland of the motor shaft. y

In detail the construction illustrated in the drawings comprises the furnace front 1,

which will vary in difl'erent installations.

In general construction the oil burner comprises a tight housing 2, having the hollow shaft 3, mounted therein in suitable bearings. This shaft may be the armature shaft of a direct connected motor within the housing, for driving the shaft-at high speed.

An oil pump 4 pumps fuel oil through the needleva ve opening 5 and through the shaft 3, from whence it issues through suitable holes into the atomizin tip 7. I The fan housing 8 orms a art of the housing 2. A suitable fan is xed on the shaft 3 and revolves at high speed within the housin 8. This fan has a hollow hub throng which the fan creates a suction through the housing 2, at the intake 13. A butterfi valve 14 is installed in the intake 13 to regu ate the volume of air admitted at 13.

he air drawn through the housin 2 cools m I the motor and carries away any oil fumes originating in the housing 2.

The air blast created by the fan escapes from the fan housing 8 into the air nozzle 15 and is blown out as a forcible armular jet at 16, between the oil atomizer 7 and the air nozzle 15. This jet picks off the atomized oil issuing from the atomizer and expands I it into a gaseous vapor, which expands laterally into a vortex flame when ignited and combustion is supported by proper admission of ventilation into the furnace, in the usual manner.

For further particulars re arding the fuel oil burner see my Patent umber 1,655,083 dated January 3, 1928. I

This invention relates particularly to the juncture of the hollow shaft 3 with the fuel oil coupling 20, see Fig. 2. This couplin is flanged and bolted to the housing 2. It has v an inner chamber 21, communicating with the end of the shaft 3. The fuel oil is led into this chamber thru the opening 5 and controlled manually by a suitable needle valve. 35

.The neck 23 is concentric with the shaft 3 and is bored to accurately fit the shaft 3. The plug 24 is alined with the shaft and provides means for clearin the same of any obstructions that may 10 go therein.

of this class.

The inner end of the neck 23 is counterbored to receive the felt or similar washer 25, protected by the knurled nut 26 screwed onto the neck 23. It is not intended to compress the'washer to any considerable extent. It

is not a compression packing in the usual sense, but merely a capillary bafiie to stop the oil seeps e by gravitation at this point.

Because 0% the relatively high s eed of the shaft 3, it is undesirable to pee it at the int 25 with compression or similar stufiing E xes, which exert an undue frictional retard, tend to cut the shaft and throw it out of alinement and at best have a low efliciency even when carefully adjusted atfrequent intervals By the present invention a high packin efliciency and other advantages are attains with minimal attention.

Besides the waste and unmechanical effect of leakage at-this int; it is a fire hazard with the types of Practice has proved a spiral groove or helix 27 internally cut in the neck 23 in the direction contrary to the direction of rotation of the shaft 3, will pump the film of oil within the neck in contact with the shaft 3, back toward the chamber 21, even in the annular washer 25, and t e inner end in the chamber a ainsta considerable head ress within this 0 amber. The obvious resu t is, no leakage past the washer 25.

The'outer end of'this helix 27 terminates oove 28, adjacent the felt '21; r The displac' or pumping action of the helical groove is further utilized in startin up the burner, see Fig. 1. The pressure tig t tank 30 of about one allon capacity is connected at 31 to the disc arge line of the pump .4 and at 33 to the suction side of the pump or to the fuel tank (not shown).

The discharge 33 has the spring relief valve 34 therein set at about ten pounds to maintain that pressure on the tank 30. This tank is connected by the pipe 35 with a bypass 36, leading to the helical groove 27 near its outer end. The shut-off cock 37 and the automatic electrically operated valve 38 are interposed in the pipe 35 to control the flow therethrough in accordance with the legal regulations relating thereto.

When the motor is started there is an interval before the pump 4, driven by the motor shaft 3, picks up its load and delivers fuel to the chamber 21. In the meantime the burner is in operation, but not igniting or functioning for lack of fuel.

This disadvantage is overcome by the fuel in the auxiliary tank 30, flowing to the helical groove,.from whence it is driven by the rotation'of the shaft 3, into the chamber 21 and from thence through the hollow shaft 3 to the burner, simultaneously with the starting els in use with burners of the motor, and previous to the pump 4 operating to capacity.

The capacit operation of the ump puts the tank 30 between the valves 34-38 until the motor starts a sin. The manual valve 37 ma also be close to stop the feed from the tan 30.

; It is advantageous, es cially with automatic. iiitiomto have el present in the burner capacity R. P. M.

It has been proved practicethat this helical groove and rotary shaft combination acts as a pump" capabl (if-exerting a r35- The ressure risesorifa "according to the sure of 25 pounds per nare inch on gravit of the fuel bein -pumped. 1 7

Sue a pump will supply several quarts of fuel an hour suflicientfto' supply a small burner on a fuel supply system such as the auxiliary tank system "by increasing the capacity of the tank or drawing from a source of sufiicient ca acit Having thus descri d t is invention what I claim and desire to secure by letters patent 1. In combination with a rotary oil burner having a hollow shaft; a fuel connection to the open end of said shaft and having a neck encircling said shaft having a helica groove therein encirclin said shaft in a direction posite to the irection of rotation of'said opposite to the direction of rotation of said s 1 aft and terminating in an annular groove; an absorbent packing encircling said shaft adjacent said annular groove; and a bypass fuel connection through said neck communicatin with said helical groove intermediate its an s ;and an auxiliary fuel tank connected with said bypass and a fuel supply. I

fore the motor and pump attain 3. In combination with a rotary oil burner having a hollow shaft; a fuel connection on circling said shaft and having an internal helical roove encircling said shaft contrawise to t c direction of rotation of said shaft; a pump having a discharge connected with said fuel connection and said helical roove.

4. In combination with a rotary oil urner having a hollow shaft; a fuel connection encircling said shaft and having an internal circling said shaft and having open to said hollow shaft and a helical groove.

helical oove encircling said shaft contrawise to t e direction of rotation of said shaft a fuel line pump connected with said fuel connection; and an auxiliary fuel supply connected with said helical veh 5. In combination with a rotary oil burner having a hollow shaft; a fuel connection on a chamber encircling said shaft and discharging into said chamber; a fuel line connected to said chamber; an auxiliary fuel suppl comprising a pressure tank connected wit said fuel line and said helical groove. In testimony whereof I have hereunto set my hand this 9th day of Jul 1980.

HARR BARLEY.

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