US1656894A

US1656894A - Liquid-fuel-delivery apparatus

Info

Publication number: US1656894A
Application number: US82873A
Authority: US
Inventors: George P Haynes
Original assignee: Todd Dry Dock Engineering & Re
Current assignee: Todd Dry Dock Engineering & Re; Todd Dry Dock Engineering & Repair Corp
Priority date: 1926-01-21
Filing date: 1926-01-21
Publication date: 1928-01-17
Anticipated expiration: 1945-01-17

Description

Jan. 17, 1928.

G. P. HAYNES LIQUID FUEL DELIVERY APPARATUS 'Filed Jan. 21. 1926 v2 Sheets- Sheet 2 ATTORNEY Patenteddan. 17, 1928.

' UNITED STATES PATENT OFFICE.

GEORGE r. mums, or BROOKLYN, nnw YORK, ASSIGNOR T TODDJJRY DOCK nner- NEERING dc REPAIR :CORPORATION, OF BROOKLYN, NEW YORK.

LIQUm-Fp'EL-DELIVERY APPARATUS.

Application filed January 21, 1926. Serial 'No. 82,873.

vision be made whereby the quantity of llquid fuel dehvered may be regulated'within wide ranges to suit consumption needs,

' while maintaining efiicient atomization.

Under existing methods of delivery the quantity of liquid fuel atomized can be varied only within a relatively limited range by reducing-the pressure at which the fuel is supplied to the atomizer, because at too low a pressure atomization will be imperfect.

It is present'day practice to equip atomizers with nozzles having delivery orifices of sizes best proportioned to" the service for which they are intended, but no satisfactory provision is made for increasing the supply delivery range, without change of parts, to suit the great flexibility in load requirements found in certain classes of service.

Therefore, my present invention was conceived for the purpose of providing a liquid fuel supply delivery apparatus whose flexibility comprehends the requirements of all practical load variations, without necessitating any change in the equipment employed.

With these objects in view my, improved delivery apparatus is embodied in a structure having an atomizing orifice for delivery of a main supply of liquid fuel, and a smaller sized atomizing orifice rearwardly spaced from the main orifice for delivery of a secondary supply of liquid fuel, both orifices being arranged along the same longitudinal axis,and each being having separate independent means of communication, to the end that supplies of liquid fuel under different pressuresmay be directed to the respective orifices.

Other features and advantages of my invention will hereinafter appear.

In the drawings Figure 1 is a side sectional view of my improved delivery apparatus for liquid fuel, provided with separate atomizing means each having its own independent supply conduit. I

Fig. 2'is a section on the line 2 2 of Fig.

. Fig. 3 is a section on the line 3'-3 of Fig.

Fig. 4 is an enlarged sectionaldetail view taken along a broken line, of the nozzle elements in their assembled form.

Fig. 5 is a face view of the intermediary plate having the secondary atomizer orifice and the collecting recess for liquid fuel passing to the main. atomizing orifice.

Fig. 6 is a face view of the rearwar nozzle element-provided with means of communication to the intermediary plate.

Fig. 7 is.a rear view of the rearward nozzle element, and

. 'Fig. .8 is a side section of said rearward nozzle element,.taken on the line 8-8 of Fig; 6.

The delivery apparatus includes the usual air supply tube 1, which en ages at its rear end with the housing 2 and as the deflector 3 provided at its forward end. An inner tube 4', in spaced relation within tube 1, engages at its rear end with the coupling memher 5, and at its forward end has anatom- The structure thus far izer assembla e. described is su stantially according to usual practice in the Todd type of burner, the tube 4 serving asa duct to convey liquid fuel to the atomizer. Since, however, my invention comprehends the provision of two separate supplies of liquid fuel to the atomizer, I place another or central tube 6 in spaced relation within tube 4, said tube 6 having separate means of engagement with coupling member 5. The tube 4 is of larger ca-. pacity than tube 6 and is termed by me the main supply tube, and the central tube 6 I call the secondary supply tube.

Ehe nozzle structure comprises arearward element, an intermediary element and a forward circular plate or tip 7 provided with an atomizing orifice 8 for delivery of the main fuel supply. The rearward ele- -ment consists of a tubular neck portion 9 form of a radial flange 12, that is pierced with a series of apertures 13. Also formation 11 has a concentric groove 14 depressed in its face in communication with apertures 13. The intermediary element consists of a disk 15 provided with a circumferential flange 16 that projects beyond both surfaces of disk 15, so that said flange ma encircle the closure formation 11 at one si" e of disk 15, and may also encircle the atomizer plate 7 at the other side of said disk in the as- :embled relation of the elements. The respective surfaces of disk 15 are identified by the letters a, b for convenience of reference. Surface a lies flatly against the face of formation 11, thereby affording front closure means for groove 14, excepting that apertures 17, through disk 15, are in communication with groove 14. The apertures 17 are arranged in a circle co-incidentto the circular arrangement. of apertures 13, but are less in number to restrict outgo from closed groove 14., as a step in the operation of breaking up the fuel.

A central recess 18 is formed in face 6 of disk 15,serving as a pocket or chamber to receive the liquid fuel, which enters saidrecess by way of slits 19 extended tangentially between the apertures 17 and the peripheral wall of the recess, the. liquid fuel being thus caused to whirl within recess 18 prepartory to its exit through the atomizing orifice 8 of forward plate" 7. The course provided through apertures 13, groove 14, apertures 17, slits 19, and chamber 18 to orifice 8 in plate 7 is that taken by the main supply of liquid fuel conveyed by tube 4.

Also the closure formation 11 is pierced with apertures 20, smaller than apertures 13 and extending from the interior of tube porameter than orifice 8, wit

tion 9 to the face of formation 11, where they communicate, by means of tangential slits 21 with, a central pocket or chamber 22 recessed in said formation 11, said pocket or chamber 22 being closed by the surface a of disk 15, excepting for a central atomizing orifice 23 therethroughil-of smaller dialigned for its discharge through plate 7.

The orifice 23 is so proportioned with respect to orifice 8 and so spaced therefrom that the atomized discharge from orifice 23 will approximately clear orifice 8.

The course dprovided through a rtures 20, slits.21 an chamber 22 to ori ce 23 is that taken by the secondary supply of liquid fuel conveyed by tube 6.

' The assemblage of atomizer elements thus described is connected with the supply tubes, to form a part of the delivery apparatus, in the following manner;

Threaded upon the forward end of the main li uid fuel supply tube 4 isan an lar nut 24, em shown as rectangular and tted within air su ply tube 1, leaving clearances 25 for the ow of air, said nut having a forward tubular portion 26, exteriorly threaded for engagement by an annular interiorly threaded cap 27, that is rovided with an inturned flange 28. As in be observed in Fig. 1, the atomizer elements lie between the'end of tubular portion, 26 and which it is' noses the flange 28, and are clam ed securely in place by screwing the cap tightly upon tubular portion 26.

The coupling member-t, which is secured vin operative position against bushing 29 by housing screw 30 is here shown as provided with the separate chambers 31, 32; tube 4 opening into chamber 31, and tube 6 fitting into a central aperture-33, through coupling 5, which aperture opens into chamber 32. A passage 34 extendsoutwardly from chamber 31 through the coupling member into communication with a passage 35 in the bushing, and connection is made with said passage by a supply pipe 36., Similarly, a passage 37 extends outwardly from chamber 32 through the coupling member into communication with a passage'38 in the bushing and connection is made therewith by a supply pipe 39. p Now it will be apparent that'when only a relatively small flame is required to issue from the burner the main supply of liquid fuel, passing through tube 4 to the larger atomizing'orifice 8, may be shut off entirely, leaving only the secondary supply open to tube 6, for delivery througlr the smaller atomizer orifice 23. It must be noted that the main and secondary atomizing and delivery means are entirel separate' and diatinct from each other, a though included in y the same apparatus; and that said supplies can be delivered separately.

()rdinarily under service conditions the main supply will be in use and the secondary supply shut off. But when less heat is to be generated the auxiliary supply will be turned on and the main supply s ut off. As either supply may be turned on before shutting off the other there need be no flame extinguishment in effecting the change over. Variations within the spirit and scope of my invention are equally comprehended by the foregoing disclosure.

I claim: a

1. A delivery. apparatus for 1i uid fuel provided with a pair of atomizin nozzle members in longitudinally spaced relation, said members respectively including axially aligned discharge orifices of different crosssectional' area, the smaller orifice being cated rearwardl of the larger orifice, and separate liquid uel supply means for each orifice operable respectively for main and secondary liquid fuel supplies under different pressuresgethe spaced relation between the nozzle mem rs being such as to rmit the atomized discharge from the sma er orifice to approximately clear the larger orifice.

2. A delivery apparatus for hquid fuel provided with a pair of atomiz-ing nozzle 'members in longitudinally spaced relation,

said members respectively including axially aligned dischargfi orifices of diiferentcrosssectional area, e smaller-orifice being 10- cated rearwardly of the larger orifice, whirling chambers anterior said nozzle members respectively and separate liquid fuel supply means for each chamber operable respectively for main and secondary liquid fuel suppliesunder different pressures, the spaced relation between the nozzle members being such as to permit the atomized dischar e from the smaller orifice to approximate y clear the larger orifice.

3. A delivery apparatus for liquid fuel provided with a pair of nozzle members in spaced relation, said members respectively provided with axially aligned discharge orifices of different cross-sectional area, the smaller orifice being located rearwardly of the larger orifice, whirling chambers anterior 1 said nozzle members respectively, tangential inlet means respectively for said chambers, and separate liquid fuel supply means for the respective inlet means operable respectively for main and secondary liquid fuel supplies under diflerent pressures, the spaced relaticnbetween the nozzle members and the relative size of said orifices being such as to permit individual atomization of the respective liquid fuel supplies.

' 4. A delivery apparatus for liquid (fuel forward face, and having means of comjmunication therewith, and said tubular neck having atomizing means which include a tip plate having an emission orifice, an intermediary disk lying rearwardly against said plate and having a recessed chamber, means of communication through said disk into said chamber, a rearward disk lying against "said intermediary disk, said rearward disk having a grooved chamber and means communicating therewith tocoact with the communicating means through the intermediary disk, a tubular neck portion extended rearwardly from said rearward disk, said intermediary disk provided with an emission orifice smaller than the orifice in the tip plate and in axial alignment therewith, said rear ward disk having a chamber recessed'in its portion provided with means of communication-with said last named communicating 7 means, a liquid fuel conveying tube, connectingmeans between said tube and the means of communication through said rearward disk, and a second conveying tube which connects with said tubular neck portion.

- Executed this 14 day of January, 1926.

enonen animus.