Rotary Spray Nozzle With Offset Outlet For Low-Pressure Operation
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Solution Overview
Problem
Conventional flexible nozzles for ejecting pressurized air are limited by requiring high pressure for stable operation, are prone to contamination and wear, and perform poorly in low-pressure applications and varying environmental conditions.
Innovation Solution
A rotary spray nozzle system featuring a stationary tube and a rigid rotor with a rotor passage that remains in fluid communication during rotation, allowing for directional ejection of pressurized air and reducing friction through a bearing connection, enabling stable rotation with low-pressure gas and across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible nozzle is used to enable rotation and dispersion of pressurized air, then the ability to spray and disperse air is improved, but the nozzle requires high pressure for stable operation and is prone to contamination and wear
Solution Approach 1:
The nozzle is divided into a stationary portion and a rotating portion that can independently move. The rotating portion includes a rotor with spray holes that can rotate relative to the stationary tube, allowing the spray function to be separated from the structural support function.
Solution Approach 2:
A bearing is introduced as an intermediary component between the stationary tube and the rotating rotor. This bearing reduces friction and wear, enabling smooth rotation while maintaining stable operation at various pressure levels.
2Ease of operation
If a flexible nozzle constrained by a horn-like guide is used to produce turning action, then the directional control is improved, but significant contact between the nozzle and guide creates contamination and wear
Solution Approach 1:
The harmful contact interaction between the nozzle and guide is extracted and eliminated. The rotor rotates freely within the stationary tube without requiring contact with external guides, removing the source of contamination and wear.
Solution Approach 2:
The bearing acts as an intermediary that enables rotational movement without direct contact between the rotor and the stationary tube wall, eliminating the friction and wear that would occur with direct contact guidance.
3Ease of manufacture
If a flexible nozzle made of synthetic resin is used, then the manufacturing is simplified, but the nozzle hardens in cold climate reducing rotation ability
Solution Approach 1:
The nozzle is segmented into stationary and rotating portions that can be made from different materials optimized for their specific functions. The rotating rotor can use materials that maintain flexibility in cold temperatures while the stationary portion can use more rigid materials.
Solution Approach 2:
Different materials are used for different parts of the nozzle system. The rotating rotor can be made from materials resistant to cold hardening, while the stationary tube can be made from materials optimized for structural stability and ease of manufacture.
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 system allows for efficient and stable ejection of pressurized air with reduced wear and contamination, enabling effective cleaning and dispersion of aerosols with a small diameter, suitable for delicate applications and varying environmental conditions.
Implementation Method 1
The stationary tube is joined to the rotor by a bearing
Implementation Method 2
ejection of the pressurized air from the outlet port is configured to produce directional components of the pressurized air in the direction of rotation about the rotor axis of rotation
Data Source
AI summary
Spray nozzle systems and methods of use are described herein. The spray nozzle system may include a stationary tube, a rigid rotor, and a sub-medium supply source. The stationary tube may be in fluid communication with a pressurized air source. The substantially rigid rotor is in fluid communication with the pressurized air source. The substantially rigid rotor includes a substantially rigid conduit that is in fluid communication with the passages of the stationary tube and the rotor. A portion of the conduit is substantially arched such that an outlet of the conduit is offset a radial distance in a radial direction from the rotor axis. Pressurized air ejected from the outlet produces directional components of the pressurized air in the direction of rotation about the rotor axis; and during use, the pressurized air rotates the rotor and sucks sub-medium from the sub-medium supply source into the stationary tube passage.