Gas Distribution Ring Assembly for Plasma Spray Systems
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Solution Overview
Problem
Conventional plasma spray systems face issues with gas distribution rings cracking under high heat loads, leading to disturbed plasma flow patterns, altered deposition characteristics, and potential electrical shorts due to the ring's contact with the cathode or anode.
Innovation Solution
A two-part gas distribution ring assembly comprising a gas distribution ring and a separate positioning ring, where the positioning ring is axially aligned between the gas distribution ring and the outlet, electrically insulates and reduces thermal stress, preventing the gas distribution ring from cracking and maintaining stable plasma flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single ceramic gas distribution ring is used to deliver plasma gas, then the structure is simple and gas delivery is effective, but the ring cracks under high heat exposure and direct contact with hot plasma gas
Solution Approach 1:
The single gas distribution ring is divided into two separate rings: a positioning ring that contacts the plasma gas and a gas distribution ring that delivers gas through openings. This segmentation allows the positioning ring to absorb thermal stress and protect the gas distribution ring from cracking, while maintaining the gas delivery function.
Solution Approach 2:
The positioning ring acts as an intermediary element between the hot plasma gas and the gas distribution ring. It absorbs the direct thermal exposure and mechanical contact with plasma gas, protecting the gas distribution ring from cracking while allowing it to maintain its gas delivery function.
2Productivity
If the gas distribution ring directly contacts the plasma gas outlet, then gas delivery is efficient, but electrical shorts occur due to direct contact with electrically charged plasma
Solution Approach 1:
The positioning ring serves as an electrical insulator and intermediary barrier between the electrically charged plasma gas and the gas distribution ring. It prevents direct electrical contact that would cause shorts, while still allowing thermal energy transfer and maintaining efficient gas delivery through the distribution ring's openings.
Solution Approach 2:
The positioning ring is placed specifically at the location where plasma gas contacts the outlet, providing localized electrical insulation exactly where the harmful electrical contact would occur. This allows other parts of the system to maintain their original functions without interruption.
3Duration of action of moving object
If the gas distribution ring is exposed to high temperature plasma gas, then plasma spray operation is maintained, but the ring cracks due to thermal stress
Solution Approach 1:
The system is segmented into two rings with different thermal exposure roles. The positioning ring is designed to withstand high temperatures and direct plasma contact, while the gas distribution ring operates at lower temperatures. This segmentation allows continuous operation by protecting the gas distribution ring from thermal cracking.
Solution Approach 2:
The positioning ring acts as a thermal barrier and intermediary that absorbs the majority of thermal stress from plasma gas. It protects the gas distribution ring from excessive heat exposure, preventing thermal cracking and enabling sustained continuous operation of the plasma spray system.
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 two-part assembly prevents cracking of the gas distribution ring, maintaining consistent plasma flow and particle trajectory while eliminating the risk of electrical shorts, ensuring reliable operation of the plasma spray system.
Implementation Method 1
a separate positioning ring axially aligned with the gas distribution ring between the gas distribution ring and an electrically charged outlet of the plasma spray system
Implementation Method 2
the positioning ring is aligned between the gas distribution ring and the outlet, electrically insulating and reducing temperature exposure to the gas distribution ring, thus preventing cracking
Implementation Method 3
a gas distribution ring including a plurality of openings allowing a gas to pass to an inner diameter thereof
Data Source
AI summary
A gas distribution ring assembly for a plasma spray system includes a gas distribution ring including a plurality of openings allowing a gas to pass to an inner diameter thereof. The assembly also includes a separate positioning ring axially aligned with the gas distribution ring between the gas distribution ring and an electrically charged outlet of the plasma spray system.