Spray Gun Nozzle Body With Vortex Gas-Guiding Elevations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spray guns face challenges in achieving effective atomization of liquid paints with lower gas pressures, particularly for water-based paints with higher viscosities, leading to reduced paint flow rates and increased noise, while maintaining transfer efficiency.
Innovation Solution
A nozzle body design with a gas-guiding surface featuring converging side surfaces on the nozzle tube wall, generating vortices in the atomizing gas flow to enhance atomization and mixing, allowing for improved atomization and mixing without increasing gas pressure or flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pressure of atomizing gas is increased to achieve finer atomization, then the atomization quality is improved, but the volume of high-frequency noises increases and transfer efficiency decreases
Solution Approach 1:
The gas-guiding surface is segmented into multiple elevations (protrusions) that divide the atomizing gas flow into multiple separate streams. Each elevation creates its own vortex structure, segmenting the single high-pressure flow into multiple lower-pressure flows that collectively achieve the same atomization effect with reduced noise
Solution Approach 2:
The elevations on the gas-guiding surface create vortex flows that add a rotational dimension to the atomizing gas. This vortex structure enhances mixing and atomization through rotational motion rather than relying solely on increased linear pressure, thereby improving atomization quality without proportionally increasing noise
2Manufacturing precision
If the pressure of atomizing gas is increased to achieve finer atomization, then the atomization quality is improved, but transfer efficiency decreases
Solution Approach 1:
By segmenting the gas flow into multiple streams through the elevations, the patent creates more uniform distribution of atomizing gas around the liquid stream. This segmented approach improves atomization quality while maintaining better transfer efficiency compared to a single high-pressure stream that disperses more widely
Solution Approach 2:
The elevations change the flow parameters of the atomizing gas by creating vortex structures and altering flow velocity distributions. This transforms the gas flow from a simple high-pressure jet into a structured flow pattern that achieves finer atomization with more effective energy utilization
3Manufacturing precision
If water-based liquid paints with increased solids content are used, then paint quality is improved, but the viscosity increases making the liquid more difficult to atomize
Solution Approach 1:
The elevations on the gas-guiding surface fundamentally change the flow parameters of the atomizing gas, creating vortex structures that enhance mixing with high-viscosity paints. This allows effective atomization of water-based paints with increased solids content that would be difficult to atomize with conventional gas flow patterns
4Manufacturing precision
If a stronger flow of atomizing gas is used to provide finer atomization, then atomization quality is improved, but consumption of pressurized atomizing gas increases
Solution Approach 1:
The segmentation of gas flow into multiple streams through the elevations allows for more efficient utilization of the atomizing gas. Each segmented stream contributes to atomization in a coordinated manner, achieving the desired atomization quality with lower total gas consumption compared to a single undivided high-volume stream
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 nozzle body design achieves a more homogeneous distribution of smaller liquid droplets, enhancing coating quality and reducing operational noise and costs by creating turbulent gas flow for improved atomization and mixing.
Implementation Method 1
the gas-guiding surface comprises a lowland portion and a plurality of circumferentially-spaced elevations, each protruding radially outward from the lowland portion, for generating vortices in the flow of atomizing gas
Implementation Method 2
The side surfaces are oriented relative to each other such as to converge towards the front end... creating turbulent gas flow for improved atomization and mixing
Implementation Method 3
enhancing the mixing between atomizing gas and liquid, i.e. to obtain a more homogeneous mixing ratio between the liquid and the atomizing gas
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Nozzle body (1) for a liquid spray gun, the nozzle body including a nozzle tube (66) comprising a) an elongated nozzle tube passage (58) extending between a nozzle tube inlet and a nozzle tube outlet (52), b) a nozzle tube wall (71) having - a front end (80) surrounding the nozzle tube outlet (52), - a radially-inner surface (76), in contact with the liquid, - a radially-outer gas-guiding surface (75) for guiding a flow of pressurized atomizing gas (110) towards the front end (80). The gas-guiding surface (75) comprises a lowland portion (90) and a plurality of circumferentially-spaced elevations (100), each protruding radially outward from the lowland portion, for generating vortices in the flow of atomizing gas (110). Each elevation (100) comprises two side surfaces (102) oriented relative to each other such as to converge towards the front end (80).