Two-phase flow nozzle with recessed liquid exit and gas extrusion gap
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Solution Overview
Problem
Existing two-phase flow nozzles face challenges in consistently producing desired particle sizes due to complex relationships between liquid and gas pressures, flow volumes, and nozzle dimensions, making it difficult to maintain a precise gap between the liquid and gas nozzles, which affects atomization efficiency and is hard to clean.
Innovation Solution
A two-phase flow nozzle design featuring a liquid nozzle with a recessed exit and a gas nozzle with a closely contacting extrusion to form a consistent gas spraying gap, along with a nozzle holder and outer case for secure assembly and easy disassembly, ensuring precise gap maintenance and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a gap is formed between the liquid nozzle and gas nozzle for atomization, then the atomization efficiency is improved, but it is very difficult to keep the gap to the desired value due to multiple manufacturing dimensional tolerances
Solution Approach 1:
A gas nozzle is introduced as an intermediary component between the liquid nozzle and the outer case. The gas nozzle has a gas spraying gap that feeds compressed gas to the liquid injected from the liquid nozzle, enabling effective atomization while the gap dimensions are controlled by the gas nozzle's own manufacturing tolerances rather than assembly tolerances between multiple components.
Solution Approach 2:
The nozzle system is segmented into distinct functional components: liquid nozzle, gas nozzle, and outer case. The gas nozzle is further segmented with a specific gas spraying gap structure. This segmentation allows each component to be manufactured and controlled independently, with the critical gap dimension being an inherent feature of the gas nozzle rather than an assembly dimension.
2Measurement precision
If the liquid nozzle has a minute diameter for liquid flow, then the particle size control is improved, but disassembling and reassembling for cleaning becomes difficult
Solution Approach 1:
The liquid nozzle is designed as a separate, detachable component that can be easily removed from the outer case. This segmentation allows the liquid nozzle with its precise minute liquid exit to be disconnected for cleaning and maintenance without affecting the overall nozzle assembly, solving the accessibility problem while maintaining particle size control.
3Adaptability or versatility
If multiple components are assembled to form the nozzle, then the functional requirements are met, but sealing to prevent liquid leakage becomes problematic
Solution Approach 1:
The gas nozzle serves as an intermediary sealing element between the liquid nozzle and outer case. The gas nozzle is fitted into the outer case with appropriate clearances, and this intermediary component provides a reliable sealing interface that prevents liquid leakage while allowing the functional requirements of both liquid and gas flow paths to be met.
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 allows for the production of a wide range of fine particles with low-pressure gas and low discharge rates, easy maintenance, and reliable sealing, simplifying the manufacturing process by reducing dependencies on multiple assembly tolerances.
Implementation Method 1
the liquid, which is injected from the liquid exit 10, is sheared by gas flow and atomized
Implementation Method 2
a swirl is produced in the atomized gas and this swirl helps the liquid injected from the liquid exit to produce a turbulent flow in the liquid
Data Source
AI summary
A two-phase flow nozzle, having limited dimensions of main parts relating to size of atomized particle and having practical means to assure the important dimension is provided. The nozzle is composed with the first liquid passage, the liquid nozzle with a liquid splaying exit, a concave located at an end of the liquid nozzle where said liquid exit is located lower than said end of liquid nozzle, a gas nozzle having a gap to supply compressed gas for atomizing from the outer periphery of said liquid nozzle to the liquid injected from said liquid exit, and a gas nozzle having a gas exit, wherein said gap is formed by sticking the minute extrusion composed integrally on said liquid nozzle with said gas nozzle or sticking the minute extrusion composed integrally on said gas nozzle with said liquid nozzle.