Piston Duct With Gasket-Made Obstacles To Prevent Clogging
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Solution Overview
Problem
Existing pistons in actuators face challenges in maintaining a controlled fluid flow between chambers while preventing clogging, especially in aviation turbines where small diameters are required to avoid operational inefficiency and clogging by pollutants.
Innovation Solution
A piston design featuring a duct with an intermediate segment that forms a leaktight tube with obstacles such as bends, constrictions, or portions in relief, which impede fluid flow and reduce the risk of clogging, allowing for easy maintenance and fabrication without the need for small cross-sectional areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a straight hole is pierced through the piston to establish fluid flow between chambers, then fluid cooling is enabled, but the hole rapidly becomes clogged by polluting particles
Solution Approach 1:
The duct incorporates bends instead of straight passages. The curved path of the intermediate segment prevents particles from traveling directly from one chamber to another, reducing clogging while maintaining adequate flow rate for fuel cooling.
Solution Approach 2:
The gasket acts as an intermediary element that forms part of the duct wall. By using the gasket material to create the intermediate segment, the design achieves a leaktight seal while providing a larger cross-sectional area that resists clogging compared to traditional small-diameter holes.
2Quantity of substance
If a Lee-jet restrictor is placed within the piston to control fluid flow, then flow rate is reduced and clogging is minimized, but the device becomes expensive and requires accurate positioning
Solution Approach 1:
The duct is integrated directly into the piston structure, combining the flow control function with the piston body. The intermediate segment with its bends and constrictions provides flow resistance without requiring a separate restrictor component, eliminating positioning issues and reducing overall device complexity.
Solution Approach 2:
The piston structure itself provides the flow control function through its integrated duct design. The bends and constrictions in the intermediate segment automatically regulate flow rate without requiring external restrictors or complex positioning mechanisms.
3Productivity
If a small diameter hole is used to maintain piston effectiveness, then operational efficiency is preserved, but the hole becomes clogged by particles in the fluid
Solution Approach 1:
The intermediate segment incorporates bends that prevent direct particle travel paths while maintaining adequate cross-sectional area. This curved geometry preserves piston effectiveness by avoiding small diameters that would restrict flow, while simultaneously reducing clogging risk.
Solution Approach 2:
The duct design transitions from a simple linear passage to a three-dimensional path with bends and constrictions. This dimensional complexity allows the duct to maintain larger cross-sectional areas for better flow and anti-clogging properties while still providing effective flow control.
Data Source
AI summary
The invention relates to a piston having a first face, a second face opposite to the first face, a third face connecting said first and second faces together and presenting a groove, and a sealing gasket housed in said groove. The piston includes a duct constituted by a first segment situated inside the piston and connecting said first face to said groove, by a second segment situated inside the piston and connecting said second face to said groove, and by an intermediate segment connecting together said first and second segments and crossing said groove, the walls of said intermediate segment being formed by the walls of said groove and by said sealing gasket in such a manner that said intermediate segment forms a leaktight tube that opens out solely via the first segment and via the second segment, said intermediate segment presenting at least one obstacle suitable for impeding the flow of fluid that flows along said intermediate segment.