US2037598A - Combustion chamber air feed means - Google Patents

Description

A15141414, 1936. F. w. SCHEIFELE 2,037,598

COMBUSTION CHAMBER AIR FEED MEANS Original Filed l pril 23, 1932 V 2 Sheets-Sheet l A ril 14, 1936. F. w. SCHEIFELE- COMBUSTION CHAMBER AIR FEED MEANS Original Filed April 25, 1952 2 Sheets-Sheet 2 Patented Apr. 14, 1936 UNITED STATES PATENT OFFICE Original application April 23, 1932, Serial No.

607,141. Divided and this application November 28, 1934, Serial No. 755,222

9 Claims.

' This invention relates to the class of heating structures, particularly fluid fuel burning furnaces, and pertains especially to air feeding means therefor, and the present application constitutes a division of application, Ser. No. 607,141,

filed April 23, 1932.

The primary object of the present invention is to provide an improved mechanism for feeding air to furnaces employing fluid fuel whereby a minimum of noise is developed and the combustion of the fuel is more evenly obtained. Another object of the invention is to provide an air supplying mechanism for furnaces wherein a novel aperture construction is employed which stratifies the air blast and effects an evener dispersion of the fuel so that the maximum of heating efiiciency is obtained therefrom.

The invention has for a further object the provision of an air feeding mechanism in which the discharge aperture is provided with baflling elements which act to stratify the air currents and, in addition to obtaining a more efiicient combustion of the fuel, effect a reduction in the noise incident to discharging the air directly into the combustion chamber.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawings but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the ap pended claims.

In the drawings:

. Figure 1 is a view in top plan of the air feeding mechanism embodying the present invention.

a Figure 2 is a view in rear elevation of the same.

Figure 3 is a view in side elevation of the mechanism showing the same coupled up with a furnace.

Figure 4 is a sectional view taken substantially upon the line 4-4 of Figure 3.

Figure 5 is a sectional view taken upon the line 5-5 of Figure 4.

Figure 6 is a view looking into the air discharge opening at the joined ends of the air conduits from the plane of separation between the device and the mouth of the combustion chamber indicated by the line 6 6 of Figure 1.

- Referring to the drawings, the air feeding means constituting the present invention comprises a base structure I which is mounted horizontally upon suitable supports such as the standards 2. Secured to or forming a part of this base are spaced fan housings 3 which have apertured air inlet plates 4 upon their remote sides and which join at their outlets 5 with air conducting 5 conduits 6.

Disposed upon the supporting base I between the fan housings 3 is an electric motor I, the armature shaft of which is extended from its two ends through the axial centers of the housings 3 10 to form the fan shafts 8. Each of these fan shafts 8 carries within a housing 3 the fan blades 9 which draw air in through the apertured plates 4 and discharge it into the conduits 6, when the motor is operated. V

Mounted upon the outer end of each shaft 8 is a plate III which is adapted to be shifted longitudinally on the shaft and held in adjusted positionby a nut II. By adjusting these plates ID, the amount of air drawn into the fan housings 20 through the apertured plates 4 may be controlled.

' The conduits-6 extend from the fan housings 3 in convergent relation, as illustrated in Figures 1 and 4, and join at their outer ends for discharge through a common outlet I2. In setting up the 5 device for use, the converged ends of the conduits are disposed against the usual fuel charging opening or mouth l3 of the furnace M in association with which the mechanism is to be used, and suitable sealing means is employed between the fuel 30 receiving mouth of the furnace and the air discharge ends of the conduits to prevent the escape of the injected air from these conduits or from the furnace.

At the outer side of the discharge end of each 35 air conduit 6, or at either side of the common air outlet opening 12 which is formed by joining the ends of these conduits, there are formed a plurality of inwardly projecting fingers I5. These fingers at each side of the opening are divided into 40 two groups, one of which is set in advance of the other and the fingers of each group are in vertically spaced relation. In addition to being vertically spaced, the fingers of one group are disposed in horizontal planes passing through the 45 spaces between the fingers of the adjacent group and further, the fingers of the two groups at one side of the air inlet passages are arranged to lie in horizontal planes passing through the spaces between the fingers of the two corresponding 50 groups upon the opposite side.

As is illustrated in Figure 4, the sides of the fingers against which the air impinges as it passes along the conduits are concaved and, as illustrated in Figure 5, the fingers are relatively broad 55 and also are slightly channeled or transversely concave. With this construction, the column of air discharged through each conduit in coming into contact with the fingers at the outlet ends of the conduits, will be deflected toward the opposite side of the air discharge opening in strata which will oppose the strata formed by the opposite group and thus cause a thorough distribution of the air in the combustion chamber of the furnace.

The numeral 96 indicates a fuel discharge nozzle which is disposed at the center of the air discharge opening with its outlet end substantially in the vertical plane of this outlet. It will thus be seen that the air sheets or strata will flow across the outlet end of the fuel nozzle and thus, as the fuel will be directed straight inwardly from the nozzle, the cross currents formed will effect the distribution of the fuel through the entire combustion chamber of the furnace and insure the complete combustion of the same.

The area between the convergent ends of the air conduit 6 is closed top and bottom, as illustratedin Figures 1 and 3, so that the air cannot escape at the point to where the fuel nozzle enters the fuel inlet of the furnace.

The fuel feed mechanism here illustrated constitutes the subject-matter of the prior application previously referred to and plays no part in the operation of the present air feeding mechanism insofar as the method of supplying the fuel to the nozzle 56 is concerned.

What is claimed is:

1. Means for supplying fluid fuel and air to a combustion chamber through a fuel inlet opening comprising a pair of air conduits having outlet ends joined in convergent relation to form a common outlet, a fluid fuel nozzle disposed centrally of said common outlet, means for driving air under pressure through said conduits, and a plurality of vertically spaced baffle fingers at each side of said common opening and projecting inwardly, said fingers being concave longitudinally of the faces against which the air impinges and further being transversely concave on said faces and the fingers upon one side of the opening being disposed in the planes of the spaces between the fingers on the other side of the opening.

2. Means for feeding fluid fuel and air to a combustion chamber comprising convergently related air conduits, the convergent ends of said conduits being joined to form a common air discharge opening, means for discharging air under pressure through said conduits, a plurality of groups of vertically spaced baflle fingers disposed at each side of said common air discharge opening and extending inwardly from the side of the same on which they are located, said groups of fingers upon each side of the opening being disposed one ahead of the other and the fingers of one group being disposed in the planes of the spaces between the fingers of the other group, the fingers of said groups being formed upon the faces against which the air impinges to cause the air to be deflected across the said openings, and a fluidfuel nozzle disposed centrally of the air discharge opening and between the ends of the said baffle fingers.

3. Means for supplying fluid fuel and air to a combustion chamber, comprising a structure having a discharge opening designed to be directed into thecombustion chamber, means for supplying air under pressure to the structure for discharge through said opening, a fluid fuel nozzle disposed in said opening for discharge into the chamber, and a series of vertically spaced air baflie fingers at each side of the discharge opening and each extending transversely thereof from the adjacent side to a point short of the center of the opening, and so disposed relative to the nozzle whereby air deflected from the fingers intersects the fluid jet adjacent its point of discharge from the nozzle.

4. Means for supplying fluid fuel and air to a combustion chamber, comprising a structure having a discharge opening designed to be directed into the combustion chamber, means for supplying air under pressure to the structure for discharge through said opening, a fluid fuel nozzle disposed in said opening for discharge into the chamber, and a series of vertically spaced bafile fingers at each side of the discharge opening and directed transversely of the same, said fingers having the faces against which the air impinges, longitudinally concave, and the fingers being so disposed relative to the nozzle whereby'air deflected from the fingers intersects the fluid jet adjacent its point of discharge from the nozzle.

5. Means for supplying fluid fuel and air to a combustion chamber, comprising a structure having a discharge opening designed to be directed into the combustion chamber, means for supplying air under pressure to the structure for discharge through said opening, a fluid fuel nozzle disposed in said opening for discharge into the chamber, and a series of vertically spaced bafil'e fingers at each side of the discharge opening and directed transversely of' the same, said fingers having the faces against which the air impinges, longitudinally and transversely concave, and the fingers being so disposed relative to the nozzle whereby air deflected from the fingers intersects the fluid jet adjacent its point of discharge from the nozzle.

6. Means for supplying fluid fuel and, air to acombustion chamber, comprising a structure having a discharge opening designed to be, directed into the combustion chamber, means for supplying air under pressure to, the structure for discharge through said opening, a fluid fuel: nozzle disposed in said opening for discharge into the chamber, and two groups of baflle fingers, each group. being disposed at one side of the discharge opening and comprising two series of fingers, one series being in advance of the other and each series having the fingers vertically spaced, one series of each group beingarranged in planes passing between the other series of thesame group, and the fingers of the series of both groups being directed transversely of the opening, and said, fingers being so disposed relative to the nozzle whereby air deflected from the fingers intersects the fluidjet adjacent its point of discharge from the nozzle.

7. Means for supplying fluid fuel, and air tov a combustion chamber through a fuel inlet opening, comprising an air conducting structure having an outlet directed toward said, fuel inlet opening, a fuel feed nozzle disposed centrally of the opening, means for driving air under pressure through said structure, and a plurality of. vertically spaced baflle fingers at each side ofsaidopening andprojecting inwardly toward but terminating short of the center thereof, the said fingers upon one side of the opening being disposed in the planes of the spaces between the fingers on the other side of the opening.

8. Means for supplying fluid fuel. and air to a combustionphamber, comprising a structure having a discharge opening designed; to be directed intothe combustion chamber, meansfor supplying air under pressure to the structure for discharge through said opening, a fluid fuel nozzle disposed in said opening for discharge into the chamber, and two groups of baffle fingers, each group being disposed at one side of the discharge opening and comprising two series of fingers, one series being in advance of the other and each series having the fingers vertically spaced, one series of each group being arranged in planes passing between the other series of the same group, the fingers of the series of both groups being directed transversely of the opening, and the fingers of each series of one group being disposed in planes passing between the fingers of the corresponding series of the other group, said fingers also being so disposed relative to the nozzle whereby air deflected from the fingers intersects the fluid jet adjacent its point of discharge from the nozzle.

9. Means for supplying fiuid fuel and air to a combustion chamber through a fuel inlet opening, comprising an air conducting structure having an outlet directed toward said fuel inlet opening, a fuel feed nozzle disposed centrally of the opening, means for driving air under pressure through said structure, and a plurality of vertically spaced baflie fingers at each side of said opening and projecting inwardly, said fingers being concave longitudinally of the faces against which the air impinges and the fingers upon one side of the opening being disposed in the planes of the spaces between the fingers on the other side of the openings.

FREDERICK W. SCHEIFELE.

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