Solid-Cone Spray Nozzle Blind Cavity Atomization
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Solution Overview
Problem
Full cone spray nozzles exhibit non-homogeneous fluid distribution at the center and periphery of the cone, leading to large variations in the straight section of the jet, affecting spray performance.
Innovation Solution
A spray nozzle design featuring an agitation chamber with a blind cavity and a peripheral groove, creating additional disturbances to enhance atomization and achieve a more uniform fluid distribution, where the fluid entering through an axial channel first interacts with the cavity before entering the chamber, promoting a swirling movement and improved atomization at the core of the conical jet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If fluid is introduced through both axial and peripheral channels in the agitation chamber, then the spray coverage area is improved, but the fluid distribution uniformity deteriorates due to different atomization forces acting on central and peripheral fluid parts
Solution Approach 1:
The invention introduces a blind cavity in the upstream wall of the agitation chamber that selectively affects the fluid flow from the axial channel. This local modification creates different flow conditions for central and peripheral fluid parts, ensuring that both fluid streams experience comparable atomization forces and achieve uniform mixing before ejection, thereby resolving the uniformity issue while maintaining comprehensive spray coverage
2Manufacturing precision
If a blind cavity is added to the agitation chamber to improve atomization, then the fluid distribution uniformity is improved, but the device complexity increases
Solution Approach 1:
The blind cavity is integrated into the upstream wall of the agitation chamber, merging the atomization enhancement feature with the existing structural wall. This integration approach allows the cavity to serve its atomization function while being manufactured as part of the chamber structure itself, minimizing additional complexity and avoiding separate components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design results in a more homogeneous fluid distribution within the jet, particularly noticeable in a row of nozzles forming a spray boom, while maintaining a compact nozzle structure.
Implementation Method 1
the upstream wall being crossed by at least one fluid inlet channel which opens in an axial direction into the chamber of agitation
Implementation Method 2
the peripheral wall being crossed by at least one other fluid inlet channel, which opens into said agitation chamber in a tangential direction
Implementation Method 3
the presence of cavities inside the agitation chamber causes additional disturbances in the fluid, which make it possible to obtain an improved atomization of the fluid
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
The present invention relates to a spray nozzle (1) which includes an agitation chamber (3) which has a substantially cylindrical peripheral wall (32), with an upstream wall (42) and a downstream wall (31), the downstream wall having an ejection orifice (30) adjacent to the outlet orifice of the nozzle, the upstream wall being traversed by at least one fluid inlet channel (41) which opens in a substantially axial direction into the agitation chamber, and the peripheral wall being traversed by at least one other fluid inlet channel (33), which opens into said agitation chamber in an essentially tangential direction, said spray nozzle being characterized in that the upstream wall includes at least one blind cavity (43) formed at a distance from said axial inlet channel and open on a face oriented towards the interior of the chamber.