| 摘要 |
<p>A burner nozzle for petroleum products comprises a nozzle assembly (10) comprising an outer disc (30) and an inner disc (62) disposed in the outer disc. Helical ramps (54,56,58; 82) on the outer and inner discs define fluid flow orifices (84) therebetween. A spring (88) biases the ramp (82) on the inner disc (62) toward the ramp (54,56,58) on the outer disc (30). Fluid pressure in the tube portion (12) forces the ramps apart to increase the orifice size to maintain a relatively high fluid flow velocity through a wide flow rate range. Fluid is discharged from the orifices in a spiraling pattern and impinges a conical inner surface (100) of a swirl chamber (94) from which the fluid is discharged from the burner nozzle. <IMAGE></p> |
