Rotary Machine Casing Plating via Internal Liquid Circulation
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Solution Overview
Problem
The existing plating methods for rotary machine casings with complex and large shapes require large, costly equipment and are inefficient due to the need for a plating tank and complex nozzle systems.
Innovation Solution
A method involving multiple opening parts in the casing for suction and discharge of pretreatment and plating liquids, eliminating the need for separate nozzles and a plating tank, with optional preheating, reductant use, stirring, and vibration to improve plating quality and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a plating tank is used to immerse the casing for plating work, then complete coverage of the inner surface is achieved, but equipment cost and device complexity increase significantly
Solution Approach 1:
The patent extracts the casing from the traditional plating tank environment and instead introduces the plating liquid directly into the casing through injection nozzles. This eliminates the need for large, complex plating tanks while achieving complete plating coverage of the inner surface through controlled liquid injection and circulation.
Solution Approach 2:
The patent uses hydraulic principles by injecting plating liquid through nozzles into the casing and circulating it through the interior space. The liquid is supplied under pressure through multiple injection points and discharged through collection channels, achieving uniform distribution without requiring immersion in a large plating tank.
2Manufacturing precision
If the casing has a large volume and complex shape, then complete plating coverage is difficult to achieve, but using a large plating tank increases cost and reduces efficiency
Solution Approach 1:
The patent segments the plating liquid delivery system into multiple injection nozzles positioned at different locations within the casing. This allows the plating liquid to be distributed to various sections of the complex-shaped casing simultaneously, ensuring complete coverage of difficult-to-reach areas while maintaining efficient operation without requiring an excessively large plating tank.
Solution Approach 2:
The patent transitions from a traditional immersion-based plating approach (requiring large three-dimensional tank space) to a targeted injection approach where plating liquid is delivered through nozzles in specific spatial dimensions. This allows efficient plating of complex geometries by directing liquid flow along the inner surfaces rather than requiring the entire casing to be submerged.
3Ease of operation
If separate nozzles are provided for supplying and discharging pretreatment and plating liquids, then liquid flow control is improved, but device complexity and cost increase
Solution Approach 1:
The patent designs the injection nozzles to serve multiple functions: they supply both pretreatment liquid and plating liquid to the casing interior. The same nozzle system is used for different liquid types and process stages, eliminating the need for separate nozzle sets and reducing overall system complexity while maintaining effective liquid flow control.
Solution Approach 2:
The patent merges the pretreatment liquid supply system and plating liquid supply system into a single integrated nozzle system. By combining these functions into one set of injection nozzles, the patent reduces the number of components, simplifies the overall device structure, and lowers costs while still achieving proper liquid distribution for both treatment stages.
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 method reduces costs and simplifies the plating process by using the casing's opening parts for liquid supply and discharge, ensuring efficient and high-quality plating without the need for a plating tank, even for complex shapes.
Implementation Method 1
a surface activating process of supplying a pretreatment liquid into the casing, then discharging the pretreatment liquid from the casing through the opening parts, and activating an inner surface of the casing
Implementation Method 2
a plating process of performing supply and discharge of a plating liquid into and from the casing through the opening parts to circulate the plating liquid and plating the inner surface of the casing
Implementation Method 3
a preheating process of supplying a pretreatment liquid into the casing, then discharging the pretreatment liquid from the casing through the opening parts, and preheating the casing between the surface activating process and the plating process
Data Source
AI summary
Provided is a method of manufacturing a rotary machine, which includes: a casing forming process of forming a casing of the rotary machine that has multiple opening parts and suctions and discharges a fluid; a surface activating process of supplying a pretreatment liquid into the casing, then discharging the pretreatment liquid from the casing through the opening parts, and activating an inner surface of the casing after the casing forming process; a plating process of performing supply and discharge of a plating liquid into and from the easing through the opening parts to circulate the plating liquid and plating the inner surface of the casing after the surface activating process; and an assembling process of providing a rotating body that is rotatable relative to the casing so as to he covered from an outer circumference side by the casing plated in the plating process.