Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1997-06-12
1999-11-23
Yeung, James C.
Stoves and furnaces
Hot-air furnaces
Compressed air
126110D, 237 123C, 237 32, F24H 302
Patent
active
059881569
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention pertains to an atomizing burner for liquid fuel for a heater with a burner nozzle assembly, which carries an atomizing nozzle and to which fuel can be fed from a fuel line via a fuel pump.
BACKGROUND OF THE INVENTION
An atomizing burner of the above-described type, in which the burner nozzle assembly and the fuel pump is, together with other components, a preassembled structural unit, which can be fastened to a flange of the burner housing, has been known from DE 35 36 170 C2. A comparatively compact design of an atomizing burner and simplified assembly are achieved as a result.
SUMMARY AND OBJECTS OF THE INVENTION
The object of the present invention is to provide an atomizing burner of the type described in the introduction, which has an even simpler design than the above-mentioned burner and which provides, in particular, an atomizing burner which has a very simple and compact design and is composed of a small number of individual parts and connection parts.
According to the invention, an atomizing burner is provided for liquid fuel for a heater, with a burner nozzle assembly, which carries an atomizing nozzle and to which fuel can be fed from a fuel line via a fuel pump. The fuel pump is integrated in the burner housing.
The burner housing may have a radial support plate, in which the fuel pump is provided. The support plate preferably has a central base, which has, on one axial side, a first recess, in which the gear assembly of the gear-driven fuel pump is arranged. A second recess is preferably arranged on another axial side of the central base, and the coupling of the fuel pump is preferably arranged in the second recess, wherein the coupling is in drive connection with the driving pinion of the gear-driven fuel pump via a drive shaft extending in an axial passage of the support plate.
The essence of the present invention is that the fuel pump is integrated in the burner housing, and the fuel pump housing is provided in a radial support plate of the burner housing in an advantageous variant of the present invention.
The support plate has a central base, which has a first recess on one axial side, and the gear assembly of the gear-driven fuel pump is arranged in the first recess.
A second recess, in which the coupling between the fuel pump and the motor is arranged, is provided on the other axial side of the support plate, and the coupling is in drive connection with the driving pinion of the gear-driven fuel pump via a drive shaft extending in an axial passage of the support plate.
The burner nozzle assembly is preferably fastened to one axial side of the support plate by fastening screws distributed over the circumference, and the burner nozzle assembly covers the first recess in a sealed manner. Consequently, the burner nozzle assembly forms with its front side the cover of the first recess, in which the fuel is pressurized by the fuel pump.
The drive motor of the fuel pump is in drive connection with the coupling, and the drive motor is fastened on the other axial side of the support plate, covering the second recess, by additional fastening screws distributed over the circumference.
The drive shaft between the coupling and the gear assembly of the gear-driven fuel pump is mounted in the support plate by means of a slide bearing, with a bush made of bearing material being provided as the slide bearing.
The drive shaft has, preferably on the coupling side, a rotary shaft seal, especially a "Simmer" ring, which is arranged in an annular recess of the support plate.
A channel is provided in the support plate between the rotary shaft seal and the first recess, essentially axially parallel and eccentrically, and the channel brings about a pressure equalization, cools the rotary shaft seal and the slide bearing and supplies same with lubricant, i.e., with diesel fuel.
Furthermore, a fuel feed line to the first recess and a fuel return line are provided in the support plate, with the connection points being located at the radially outermost point of th
REFERENCES:
patent: 3648681 (1972-03-01), Stump
patent: 4718602 (1988-01-01), Beck et al.
patent: 4998878 (1991-03-01), Gruber
Keinert Helmut
Mohring Fritz
Schmid Hans-Jurgen
Schodt Adolf
J. Eberspacher GmbH and Co.
Yeung James C.
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