US2628131A - Oil burner - Google Patents

Description

Feb. 10, 1953 H. J. HABERSTROH OIL. BURNER Filed April 14, 1950 Mw LAL INVENTOR H995 EH r c//ffps 7770// Patented Feb. 10, -1953 y UNITED STATES PATENT OFFICE 2,628,131 OILBURNER Herbert J. Haberstroh, Bristol, Conn. Application April 14, 195o, serial No. 155,969

1 claim. (o1. 299-133) This invention relates to oil burners, and more particularly to an automatically adjustable, pressure responsive oil burner nozzle.

A main object of the invention is to provide an automatically adjustable oil burner nozzle which is simple in construction, dependable in operation, and which veliminates the necessity of changing nozzles or portions thereof to meet changes in the demand of the steam boiler or other boiler with which the burner nozzle is employed.

A further object of the invention is to provide an improved, 'automatically adjustable oil burner nozzle which is inexpensive to manufacture, involves relatively few parts, is rugged in construction, and provides a wide range of orifice adjustment responding automatically to changes in the pressure of the oil vsupplied to the nozzle.

Further objects and advantages of the invention will become apparent from the following description and claim,l andfrom'the accompanying drawings, wherein:

Figure 1 is a side elevationalv view, partly in longitudinal, 'cross-section',A of an improved, automaticail'y adjustable l oilwburner nozzle constructed in accordance with the present invention; f l

Figure 2 is an enlarged,cross-sectional View taken on linev 12T-Lof Figure 1;

Figure., 3 is a cross-,setionalview taken on line 3 3 of Figure l;

Figure 4 is an enlarged, cross-sectional View taken on line 4--4 of Figure 1;

Figure 5 is an enlarged, cross-sectional view taken on line 5 5 of Figure 1;

Figure 6 is an enlarged, cross-sectional view taken on line 6-6 of Figure 1.

Referring to the drawings, II designates an elongated, tubular barrel formed at its forward end with a reduced, threaded portion I2. Threaded on portion I2 is a sleeve member I3 formed at its forward end with a reduced, threaded portion I4. lThreaded on portion I4 is the apertured discharge cap I5. Cap |5 is formed at its central portion with the tapered orifice I6 which has a flared inner portion Sleeve member I3 is formed with a conical recess |8 communicating with the end of the sleeve by passages I9, I9. Tangential whirl ports 2|) are formed in the inner wall surface of the discharge cap l5, providing passages between the tapered portion ll and the passages I9.

Threaded into the rear end of the barrel Il is an oil supply tting 2| formed with an oil inlet conduit 22 and having secured in its main cavity a cylindrical strainer 23. The strainer 23 has apertured end walls 24, 25 which are sealingly secured to the internal wall surfaces of the main body portion of the fitting 2|. The strainer end walls 24 and 25 are formed with apertures, such as shown at 26 in Figure 4. Threadedly secured on the rear end of the fitting 2| is a shouldered, hollow cylindrical member 2l having a forward wall element 28 formed with apertures 29, 29communicating with the space rearwardly adjacent the apertured end wall 25 of the strainer 23. Sealingly secured to the wall 28 inside member 2`| is an expansible resilient bellows member 3D having an inherent bias in a direction toward said wall. Designated at 3| is a rod member which extends axially through the barrel II, the strainer member 23 and wall element 23, and is secured at its rear end to the rear wall of the bellows 3D. The rear end portion of the rod 3| preferably is threadedly engaged in the rear wall of the bellows and is locked in adjusted position by a lock nut 32. Encircling the rod member 3| inside the bellows 3|) is a coil spring 33 which bears between the wall 28 and the rear wall of the bellows, biasing the rod member 3| rearwardly. The forward portion of the rod member 3| extends slidably through the reduced forward portion I4 of the sleeve I3, the forward end of the rod 3| being tapered and engaging within the aperture I6 in the discharge tip I5, as shown in Figure l. The rod member 3| extends slidably through wall 28 and slidably and sealingly through the end walls 2t and 25 of the strainer 23. The rear end of the rod member 3| is provided with a slotted head 3d which may be engaged by the blade of a screw driver or other similar tool for adjusting the position of the rod member. The member 28 is provided with a removable rear cap whereby access to the slotted end 34 of the rod member 3| is available whenever required.

In operation, oil enters the inlet conduit 22 and then passes through the strainer 23 and the apertured forward end wall 24 thereof, passing through the barrel |I, the recess I8, the passages I9, the grooves 20, and past the end of the rod member 3| through the aperture I6, discharging from the tip I5 in an atomized condition. The rate of discharge is governed by the position of the tapered forward tip of the rod member 3|. Oil also passes rearwardly through the apertured wall 25 of the strainer 23 and through the openings 29, 29 into the bellows 30, extending the bellows 30 rearwardly in accordance with the 3 pressure of the oil. The normal position of the rear wall of the bellows 30 is established by spring 33, which also establishes the normal clearance between the forward end of rod member 3l and the discharge opening in the tip l5. Rearward extension of the bellows 30 under the pressure of oil admitted into the bellows moves the rod member 3| rearwardly, enlarging the discharge passage between the forward end of the rod member and the discharge opening in the tip l5, whereby when the oil pressure is high, a relatively high rate of discharge of the atomized oil is obtained. When the pressure of the oil admitted into the inlet conduit 22 is small, the bellows 3U is in'a relatively contracted condition, whereby the discharge passage at the tip I5 is relativelysmall and therefore the discharge rate of the atomized oil is similarly small. It will be therefore apparent that the discharge rate of the atomized oil at the burner tip is governed substantially in accordance with the value of the pressure of the oil furnished at the intake conduit 22. Automatic regulation of the discharge rate of the atomized oil is therefore obtained in accordance with the pressure of the oil furnished to lthe burner device. This enables the burner device to be employed over a wide range of different inlet oil pressures and automatically varies the rate of discharge of the atomized oil without the necessity of changing the sprayer tip whenever changes in demand of the steam boiler or other device employing the burner occur. The device functions to provide proper atomization of the oil over a wide range of demand conditions and prevents-waste of oil, and also prevents inefficient combustion thereof. The device is especially applicable for use on marine vessels, such as warships and the like, wherein a considerable amount of rapid maneuvering is required. The use of the present device eliminates waste of time previously consumed in changing burners and enables a steady steam pressure to be obtained at all times, since the burners respond'automatically to provide proper atomization andfeeding of the fuel under all conditions of fuel supply pressure.

While a specic embodiment of an improved automatically self adjusting oil burner device has been disclosed in theV foregoing description, it will be understood Athat 'various modicationswithin the spirit of 'the 'invention may occur `to those .ment in closing engagement with the rear end of the barrel, said wall element slidably receiving said rod and having an aperture therethrough, means removably closing the open end of the Ahollow cylindrical member, an expansible bellows secured to said forward wall element rearwardly thereof and communicating with said aperture, the rear portion of said valve rod being secured tothe end wall of the bellows said bellows having an inherent bias in a direction to close the valve, spring means biasing the valve rod rearwardly to establish a normal amount of fuel discharge clearance at the burner tip, and a fuel inlet conduit connected to said space, whereby fuel may pass through said strainer both forwardly and rearwardly in the barrel, said bellows being expansible to retract said rod responsive to increase in pressure of the fuel, whereby the fuel discharge opening at the burner tip is enlarged.

HERBERT J. HABERSTROH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 20,027 Wettstein June 30, 1936 1,814,443 Goldberg July 14, 1931 2,391,808 Vincent Dec. 25, 1945 2,414,544 Moore Jan. 21, 1947 2,416,685 Fletcher Mar. 4, 1947 FOREIGN PATENTS Number Country Date 97,829 Austria Sept. 10, 1924 488,937 Germany Jan. 9, 1930 577,176 Great Britain May 8, 1946

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