Electrostatic Spray Assembly with Segmented Electrodes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrostatic spray nozzle assemblies face issues with high voltage leakage, imprecise manufacturing, fluid leakage, and inefficient control of liquid discharge, leading to reduced operational efficiency and waste of costly fluids.
Innovation Solution
The design includes a non-metallic housing with a metallic electrode block and elongated electrode elements for precise charging and mounting, along with an induction bar to generate an electrical field, ensuring efficient and uniform fluid charging and distribution, while also featuring large flow passages resistant to clogging and easy to clean, and a valve system for cyclic operation without dripping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional electrostatic spray nozzle assemblies are used, then fluid discharge can be achieved, but high voltage leakage occurs and manufacturing precision is difficult to maintain
Solution Approach 1:
The electrode assembly is segmented into modular components with precise mounting features. The electrode block contains multiple precisely positioned mounting holes that accommodate individual electrode elements, allowing each electrode to be independently positioned and secured with high precision, thereby preventing high voltage leakage between adjacent electrodes.
Solution Approach 2:
Insulating materials are introduced as intermediaries between the metallic electrode block and the housing, and between adjacent electrode elements. These insulating barriers prevent high voltage leakage while allowing the metallic electrode block to provide precise mechanical positioning and structural support for the electrodes.
2Manufacturing precision
If multiple electrostatically charged flow streams are directed, then coating uniformity improves, but fluid leakage increases and control difficulty increases
Solution Approach 1:
The spray system is divided into multiple independent electrode elements, each creating a separate charged flow stream. The electrode block contains multiple independently controllable electrodes positioned in precise geometric arrangements, enabling each stream to be controlled separately while maintaining overall distribution uniformity.
Solution Approach 2:
The valve system incorporates movable valve elements that can dynamically adjust the liquid flow to each electrode element independently. This dynamic control allows precise regulation of each charged flow stream during cyclic operation, preventing fluid leakage while maintaining uniform spray distribution across multiple streams.
3Productivity
If cyclic operation is implemented, then productivity increases, but undesirable dripping occurs during shut-off
Solution Approach 1:
The valve system is designed to close the liquid supply to each electrode element before the electrode is deactivated during cyclic operation. This preliminary closure action ensures that no liquid remains in the electrode or discharge path when the electrostatic field is turned off, preventing dripping and coating fluid waste during shut-off periods.
Solution Approach 2:
The valve control system incorporates feedback mechanisms that monitor the operational state of each electrode element and automatically adjust the liquid supply timing. When an electrode is deactivated, the feedback signal triggers immediate valve closure to prevent liquid accumulation and subsequent dripping, enabling efficient cyclic operation without fluid waste.
4Measurement precision
If small fluid passages are used, then spray precision improves, but clogging increases and cleaning difficulty increases
Solution Approach 1:
The fluid passages are designed with non-uniform cross-sections, featuring larger inlet passages that gradually transition to smaller outlet passages near the electrode tips. This local quality variation allows the system to maintain spray precision at the outlet while providing adequate passage width at the inlet for easy cleaning and resistance to clogging.
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 solution enhances the efficiency and reliability of the spray nozzle assembly, reducing power consumption, extending life expectancy, and ensuring uniform coating or lubrication with minimized waste and clogging, while maintaining safety and ease of maintenance.
Implementation Method 1
an induction bar for disposition onto items to be sprayed or coated
Implementation Method 2
generate an electrical field, ensuring efficient and uniform fluid charging and distribution
Implementation Method 3
electrode elements for precise charging and mounting
Implementation Method 4
electrostatically charged and atomized by means of a high voltage electrode
Data Source
AI summary
An electrostatic spraying assembly including a housing and a plurality of elongated electrode elements supported within the housing each defining a respective fluid passageway. An electrode header connectable to a high voltage source is supported within the housing in spaced relation to the electrode elements for charging the electrodes to an electrical potential by induction, and in turn, charging liquid directed through the passageways. The electrode header and a resilient valve element supported thereon are movable between retracted and closing positions for controlling the flow of fluid through the electrode passageways for discharge into an electrical field generated by an induction element supported in spaced relation to the discharge ends of the electrode elements.