Swirl type pressure fuel atomizer

• US 4,011,996 A
• Filed: 09/18/1975
• Issued: 03/15/1977
• Est. Priority Date: 10/25/1973
• Status: Expired due to Term

• Current Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
• Original Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
• Inventors: Fujii, Yuichi, Asai, Minoru, Tsuji, Shoichi
• Primary Examiner(s): Love, John J.
• Application Number:
  US05/614,446
• Time in Patent Office: 544 Days
• Field of Search: 239/404, 239/406, 239/425, 239/467, 239/491, 239/493, 239/498, 239/502, 239/518, 239/489, 239/568
• US Class Current: 239/491
• CPC Class Codes: B05B 1/02 designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shapeB05B1/26, B05B1/28, B05B1/34 take precedence
• CPC Class Codes: B05B 1/3405 to produce swirl
• CPC Class Codes: F23D 11/383 with swirl means

Abstract

An improvement of a swirl type fuel atomizer is disclosed in which a plurality of notches 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.

Claims

1. A burner assembly comprising a housing having a passage for receiving fuel at one end thereof, a nozzle tip extending from said housing and defining an outlet opening in communication with the other end of said passage, and means for imparting a swirl to said fuel as it passes to said nozzle tip for discharge through said outlet, said nozzle tip being frustro-conical in shape and having a plurality of sawtooth-shaped grooves formed therein, each groove defined by a first wall extending from the end of said tip and located in a plane including the longitudinal axis of the tip and a second wall which extends from the base of said first wall to the first wall of an adjacent groove, to divide the fuel discharging from said nozzle tip into a plurality of separate spray patterns.

2. The burner assembly of claim 1, wherein said grooves extend for the entire thickness of said nozzle tip.

3. The burner assembly of claim 1, wherein said grooves extend equi-angularly with respect to each other.

4. The burner assembly of claim 1, wherein said second wall of each groove extends in a substantially helical path from the base of said first wall to the first wall of an adjacent groove.

5. The burner assembly of claim 1, wherein said nozzle tip includes two sawtooth-shaped grooves with the first walls thereof spaced 180°

apart.