Shaped Air Ring Nozzle Geometry for Rotary Atomizer Homogeneity
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Solution Overview
Problem
Existing shaping air rings for rotary atomizers either fail to provide a homogeneous shaping air stream, leading to uneven influence on paint droplets, or require higher compressed air consumption to achieve a uniform air flow.
Innovation Solution
A shaping air ring with annularly arranged shaping air nozzles, each with a nozzle channel having a channel outlet opening with a greater width than height, designed to minimize air consumption while ensuring a homogeneous air stream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the outlets of the shaping air nozzles are located close to the spray edge, then the air consumption for the shaping air can be kept low, but the individual air streams generated by the shaping air nozzles are still clearly recognizable as separate air streams at the spray edge, resulting in no homogeneous shaping air stream
Solution Approach 1:
The patent changes the geometric parameters of the nozzle outlets, specifically making the outlet opening width greater than the outlet opening height. This parameter modification allows the individual air streams to merge more effectively into a homogeneous stream while keeping the nozzles close to the spray edge, thus maintaining low air consumption.
2Stability of the object's composition
If the outlets of the shaping air nozzles are further away from the spray edge, then the individual air flows generated by the shaping air nozzles merge into one another before they impinge on the spray edge, resulting in a homogeneous deflection air flow, but the air consumption for the shaping air is greater
Solution Approach 1:
The patent modifies the outlet opening geometry (width greater than height) to achieve homogeneous air stream formation at shorter distances from the spray edge, thereby reducing the required nozzle-to-spray-edge distance and lowering compressed air consumption while maintaining stream homogeneity.
3Loss of energy
If the outlet opening width is greater than the outlet opening height, then a homogeneous shaping air stream is achieved with reduced air consumption, but the nozzle channel geometry becomes more complex
Solution Approach 1:
The patent applies local quality by making the outlet opening dimensions asymmetric (width greater than height) specifically at the nozzle exit, while the rest of the nozzle channel can maintain simpler geometry. This localized geometric modification achieves the desired air stream homogeneity without requiring complex geometry throughout the entire nozzle channel.
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
The solution achieves a highly even influence on paint droplets with reduced compressed air consumption, resulting in a more concentrated and uniform coating material cloud.
Implementation Method 1
The shaping air nozzles emit a shaping air stream forward coaxially with the bell cup shaft
Implementation Method 2
the individual paint droplets are influenced differently by the shaping air in their trajectories
Data Source
Figure 1~2
Figure 3~6
Figure 7
AI summary
A shaping air ring for a rotary atomizer comprises annularly arranged shaping air nozzles (5), each having a nozzle channel (8). The nozzle channel (8) has a channel inlet opening (9) and a channel outlet opening (10), wherein the channel outlet opening (10) has an outlet opening height (t2) and an outlet opening width (a2). The outlet opening width (a2) is greater than the outlet opening height (t2).