Modular Anode Support for Plasma Spray Gun
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Solution Overview
Problem
The F4 plasma spray gun's complex design with multiple brazed components leads to high replacement costs and maintenance challenges, as entire sections must be replaced if damaged, and the brazed joints are prone to leaks and damage during assembly and disassembly.
Innovation Solution
A modular anode support member comprising separable outer and inner sleeves and a coolant tube, eliminating the need for brazing and allowing independent replacement of components, with integrated coolant passageways and alignment features for secure assembly without pressure testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple brazed components are used to construct the anode support member, then the structural integrity and cooling efficiency are improved, but the manufacturing complexity and maintenance cost increase significantly
Solution Approach 1:
The anode support member is divided into multiple separable components including an outer sleeve, inner sleeve, and coolant tube assembly. These segmented components can be manufactured independently and assembled without brazing, reducing manufacturing complexity while maintaining structural integrity through precision-fit interfaces and sealing mechanisms.
2Strength
If brazed joints are used to assemble components, then the structural strength is improved, but the susceptibility to leaks and damage during assembly/disassembly increases
Solution Approach 1:
Sealing elements such as O-rings or gaskets are introduced as intermediary components between the sleeve components and coolant tube. These intermediaries create reliable seals without requiring brazed joints, eliminating the risk of leaks at joint interfaces while allowing for easy assembly and disassembly during maintenance.
3Reliability
If entire sections are replaced when components are damaged, then the reliability is maintained, but the operational cost and downtime increase
Solution Approach 1:
The anode support member is designed as a segmented modular assembly where the outer sleeve, inner sleeve, and coolant tube are separate replaceable components. This segmentation enables selective replacement of only the damaged component rather than the entire section, significantly reducing maintenance costs and operational downtime while maintaining system reliability.
4Measurement precision
If pressure testing is performed on brazed joints, then the leak detection accuracy is improved, but the manufacturing time and cost increase
Solution Approach 1:
Sealing intermediaries such as O-rings are used to create reliable seals between components, eliminating the need for pressure testing of brazed joints. The modular design with standardized sealing interfaces allows for visual inspection and simple leak checks without requiring time-consuming pressure testing procedures, thereby improving manufacturing efficiency.
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 reduces operational costs by enabling component-by-component replacement, simplifying maintenance, and enhancing durability through robust construction, while eliminating the need for costly brazing and pressure testing.
Implementation Method 1
Resistance heating from the arc causes the gas to reach extreme temperatures and ionize forming a plasma flame directed through the nozzle
Implementation Method 2
A plasma flame is initiated by a high voltage discharge which causes localized ionization and a conductive path for an arc to form between the cathode and anode
Implementation Method 3
a water cooling system is also provided for cooling both the anode and cathode and associated parts of the spray gun
Data Source
AI summary
The present invention provides a modular anode support member for a plasma spray gun including an outer sleeve, an inner sleeve, and a coolant tube connectable to the outer sleeve. The outer sleeve having a cylindrical sidewall defining a central opening through a length thereof for receiving the inner sleeve. The outer sleeve including a mounting member for mounting the outer sleeve and an associated spray gun to a spray gun manipulator. The inner sleeve for receiving an anode housing is removably disposed in the central opening of the outer sleeve and includes forward and rearward portions defined by a stepped central bore through a length thereof. The forward portion for receiving an anode housing therein, the rearward portion for carrying coolant to and from the anode housing. Alignment means are provided for fixing the relative position of the inner sleeve and outer sleeve in assembly.