초록 ▼

A burner assembly in which various elements are joined in a manner which ensures gastight integrity of the assembly. A porcelain-coated base plate is formed of a pair of overlying steel sheets with integral embossments defining air-gas ducts to burner heads mounted on the base plate and defining ign

A burner assembly in which various elements are joined in a manner which ensures gastight integrity of the assembly. A porcelain-coated base plate is formed of a pair of overlying steel sheets with integral embossments defining air-gas ducts to burner heads mounted on the base plate and defining ignition tubes for conducting a flame from a pilot housing to the burner heads. The air-gas ducts are sealed by establishing a pressurized flow of a slurry of ceramic frit therethrough, which is effective to coat the full interior of the ducts and close any crevices formed between the sheets. The burner head elements are arranged to provide metal-to-metal sealing engagement with peripheral edges of apertures in the base plate sheets which are characteristically free of porcelain enamel coating. An annular embossment on one of the sheets is preloaded by deflecting it toward the other sheet during assembly of the burner head elements. The embossment is locked into the stressed preloaded condition by permanent deformation of a flange on one of the burner head elements in a manner which transfers the preload force to the contact areas of the various head elements and base plate to ensure that their engagement is gastight. The structure of the burner heads and base plate is arranged to increase the contacting forces between the various elements during operation as a result of differential thermal expansion of the elements.

대표청구항 ▼

A method of making a sheet metal burner assembly comprising the steps of providing a base plate of two joined, overlying sheet members of metal stock, said sheet members each being provided with an aligned aperture at a burner head location, portions of said sheet members forming the periphery of sa

A method of making a sheet metal burner assembly comprising the steps of providing a base plate of two joined, overlying sheet members of metal stock, said sheet members each being provided with an aligned aperture at a burner head location, portions of said sheet members forming the periphery of said apertures being spaced apart, assembling a burner head on said plate at said location by providing inner and outer shell members of uniform thin-walled metal stock, aligning one of said shell members with one of the apertures and the other shell member with the other aperture, resiliently deflecting the apertured peripheral portion of a first of said sheet members relative to the second in a direction normal to the plane of the apertured peripheral portion, subsequently plastically deforming a peripheral flange of one of said shell members in a radial direction to lock said resiliently deflected apertured perIpheral portion in its deflected position and to allow the stress in the resiliently deflected portion to maintain said sheets in gastight sealing engagement with their said apertures.