Free Micro-Ball Valve Plate for Low-Loss Compressor Sealing
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Solution Overview
Problem
Passive compressor valves in existing technologies are inefficient and durable at specific rotational speeds, prone to wear, and unsuitable for wide operational ranges of speed, pressure, and temperature, making them inadequate for applications like automotive ignition prechambers that require variable speed operation without maintenance.
Innovation Solution
A valve plate with free micro-balls that allows gas flow from an upstream to a downstream volume with low resistance, operating over a wide range of frequencies and temperatures, featuring a micro-ball mechanism that moves under pressure differences without a return spring, ensuring durability and self-cleaning capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive compressor valves are designed with a return spring to ensure quick closing and limit back-flow, then volumetric efficiency is improved, but energy losses increase due to gas lamination and wear occurs at contact points
Solution Approach 1:
The patent removes the return spring from the valve mechanism entirely. Instead of using a spring to close the valve, the invention uses a piloted diaphragm that is actively controlled to open and close the valve in synchrony with the compressor piston, eliminating the spring and its associated energy losses and wear points
Solution Approach 2:
The patent replaces the passive mechanical spring-based valve closure system with an active piloted control system using a diaphragm actuated by pressure differential. This substitution allows for more precise timing of valve closure and eliminates the continuous contact and energy dissipation associated with spring-based systems
2Productivity
If passive compressor valves operate at high rotational speeds, then productivity is improved, but the valves experience increased wear and reduced durability due to operating outside optimal speed ranges
Solution Approach 1:
The patent transitions from a static spring-based valve system with fixed natural frequency to a dynamic piloted system where the diaphragm is actively controlled to respond to varying pressure conditions. This allows the valve to adapt to different rotational speeds and operating conditions, maintaining durability across a wide speed range
Solution Approach 2:
The patent changes the operating parameters of the valve system by using a piloted diaphragm that responds to pressure differential rather than a fixed spring force. This allows the valve timing and closure characteristics to vary with operating conditions, enabling reliable operation at both low and high rotational speeds
3Reliability
If passive compressor valves use a return spring to ensure tight closing, then sealing is improved, but wear occurs at the contact between the valve and seat, valve and opening stop, and spring contact points
Solution Approach 1:
The patent removes the return spring and its associated contact points (valve-to-seat, valve-to-opening stop, spring-to-housing) that generate wear. The piloted diaphragm system closes the valve without mechanical contact wear, significantly reducing maintenance requirements
Solution Approach 2:
The piloted diaphragm system is self-actuating based on pressure differential, requiring no external spring force or mechanical return mechanism. The system serves itself by using the process fluid's own pressure to control valve timing and closure
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 valve plate with free micro-balls enhances energy efficiency, durability, and reduces maintenance needs by allowing operation over a wide range of speeds and conditions, maintaining performance without the need for a return spring, which reduces wear and energy losses.
Implementation Method 1
the micro-ball being capable to move in translation longitudinally in said cylindrical orifice so as to either sealingly rest on the micro-ball seat
Implementation Method 2
said micro-ball being capable to move in translation longitudinally in said cylindrical orifice so as to either sealingly rest on the micro-ball seat in order to close the circulation orifice
Data Source
AI summary
The valve plate (1) with free micro-balls allows a fluid (2) to flow from an upstream volume (3) to a downstream volume (4) and not in the reverse direction, and comprises a circulation plate (5) crossed through by a circulation orifice (6) terminated by a micro-ball seat (7), a permeable guide plate (9) parallel to said plate (5) being crossed through by a guide cylindrical orifice (10) which houses a micro-ball (8) which rests on said seat (7) so as to close said orifice (6) or rests on a permeable micro-ball stop abutment (11), a spacer (12) being interposed between said plate (9) and said plate (5), a discharge passageway (13) crossing through said plate (9) to allow the fluid (2) to flow when the micro-ball (8) does not rest on said seat (7).