Swirl type pressure fuel atomizer
AssigneeIshikawajima-Harima Jukogyo Kabushiki Kaisha
InventorsShoichi Tsuji, Minoru Asai, Yuichi Fujii
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Abstract
An improvement of a swirl type fuel atomizer is disclosed in which a plurality of projections, grooves or recesses are equiangularly formed around an opening of a single-nozzle hole so that the liquid fuel injected may be divided into a plurality of fuel spray patterns. The complete combustion with a relatively low temperature may be ensured so that the emission of nitrogen oxides may be substantially eliminated or reduced.
Claims9
A burner assembly comprising a housing having a main flow passage therein adapted to receive fuel at one end thereof;
- a nozzle tip secured to said housing and having an inner wall portion defining a nozzle hole aligned along a nozzle axis;
- one end of said nozzle hole functioning as an outlet opening for said fuel;
- a chamber of larger diameter than said nozzle hole and having one end registering with the other end of said nozzle hole;
- a plurality of grooves extending tangentially to said chamber adjacent the other end thereof;
- means for receiving said fuel from said main flow passage and dividing said fuel into a plurality of relatively small flow streams extending parallel to the axis of said main flow passage and said chamber and respectively registering with said grooves so that said grooves impart a swirl to said fuel as it passes through said chamber;
- said inner wall of said nozzle tip defining said nozzle hole being provided with a plurality of spaced discharge grooves formed therein to divide the fuel discharging from said outlet opening into a plurality of separate spray patterns;
- said discharge grooves being bevelled with respect to said axis and diverging toward said outlet opening.
A burner assembly comprising a housing having a main flow passage therein adapted to receive fuel at one end thereof;
- a nozzle tip secured to said housing having an inner wall portion defining a nozzle hole aligned along a nozzle axis;
- one end of said nozzle hole functioning as an outlet opening for said fuel;
- a chamber of larger diameter than said nozzle hole having one end registering with the other end of said nozzle hole;
- a plurality of grooves extending tangentially to said chamber adjacent the other end thereof;
- means for receiving said fuel from said main flow passage and dividing said fuel into a plurality of relatively small flow streams extending parallel to the axis of said main flow passage and said chamber and respectively registering with said grooves so that said grooves impart a swirl to said fuel as it passes through said chamber;
- said inner wall defining said nozzle hole being provided with a plurality of spaced projections which extend radially inward from said wall to divide the fuel discharging from said outlet opening into a plurality of separate spray patterns;
- each of said projections having a portion bevelled with respect to said axis and another portion substantially parallel to said axis.
Dependencies are inferred from the claim text.