Rotary Electrostatic Sprayer Removable Electrode Ring
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Solution Overview
Problem
Conventional electrostatic sprayers face challenges in efficiently coating interior surfaces of objects like motor vehicle bodyworks due to electrode dirtiness and the need for frequent cleaning, which limits their operational duration and versatility.
Innovation Solution
A rotating electrostatic sprayer design with electrodes and resistors mounted on a removable ring that can be easily taken out for cleaning, allowing for quick exchange and minimizing downtime, while maintaining a compact form for interior surface coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrodes are mounted on a fixed ring structure, then the sprayer can maintain structural stability, but the ring becomes soiled and requires regular disassembly and cleaning, leading to long interruptions in operation
Solution Approach 1:
The electrode assembly is segmented into a modular ring structure that can be independently removed from the sprayer body. The ring with electrodes and resistors forms a separable unit that can be quickly detached and reattached, allowing cleaning without complete disassembly and minimizing operational interruptions.
2Reliability
If electrodes are arranged with diverging configuration toward the front of the projector, then charging effectiveness is improved, but a relatively large hood is required, making the projector bulky
Solution Approach 1:
The electrode arrangement utilizes the radial dimension of the rotating bowl to achieve diverging configuration. Electrodes are positioned at different radial distances from the rotation axis, allowing effective charging geometry without extending the axial length of the projector body, thus maintaining compactness.
3Adaptability or versatility
If the sprayer is designed for interior surface coating, then versatility is improved, but spray guns are highly susceptible to overspray and get dirty quickly, particularly around electrodes
Solution Approach 1:
The removable ring design enables the electrode assembly to serve itself through easy removal and cleaning. The modular structure allows rapid detachment of the soiled electrode ring from the sprayer body, facilitating quick cleaning or replacement without affecting the main sprayer components, thus maintaining interior coating capability.
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
Enables efficient and rapid cleaning of the sprayer components, extending the operational duration and allowing for continuous production without interruptions, while maintaining the sprayer's compactness for interior surface coating applications.
Implementation Method 1
a drive turbine mounted in the body and configured to drive the bowl in rotation around an axis of rotation defined by the body
Implementation Method 2
charge a coating product leaving the spray nozzle of a spray bowl by the corona effect, using electrodes arranged on the body of a sprayer and held at high voltage
Data Source
Figure 1
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AI summary
This rotating electrostatic coating sprayer (10) includes a spray bowl (106), a body (102), and a drive turbine mounted in the body and configured to rotate the spray bowl about an axis of rotation (A100) defined by the body. The sprayer also includes electrodes (146) for charging the coating product sprayed by the spray bowl, these electrodes being mounted on a ring (160) attached to the body and each supplied with high voltage through a resistor.Each resistor (180) extends axially outside the ring (160) and is equipped, at its end opposite the electrode (146) which it supplies, with a first electrical connection plug (208) on a second plug of corresponding geometry provided on the body (102), with a movement parallel to the axis of rotation, and in that the ring (160) is configured to be mounted and connected (F2) on the body (102), or dismounted and disconnected (F1) from the body, being equipped with the electrodes (146) and the resistors.