Electromechanical Flywheel Evacuation System
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Solution Overview
Problem
Modern electromechanical flywheels face operational limitations and high costs, limiting their widespread application, and existing vacuum systems fail to maintain desired vacuum conditions for flywheel operations.
Innovation Solution
An electromechanical flywheel with an evacuation system that includes a flywheel mass enclosed in an evacuable housing, a gas removal train with a mechanical vacuum pump and non-mechanical gas removal devices like getter material and molecular sieve, and a pressure sensor to maintain threshold vacuum pressure levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior art vacuum systems are used in electromechanical flywheels, then vacuum conditions are established, but desired vacuum conditions are not maintained
Solution Approach 1:
The evacuation system is segmented into multiple functional components: a mechanical pump for initial evacuation, a non-mechanical pump (getter material) for maintaining vacuum, and a molecular sieve for moisture removal. Each component handles specific aspects of vacuum maintenance, allowing the system to achieve and sustain desired vacuum conditions while managing complexity through functional division.
Solution Approach 2:
A non-mechanical pump (getter material) serves as an intermediary between the mechanical pump and the flywheel enclosure. The getter material continuously absorbs residual gases and maintains vacuum conditions without mechanical moving parts, bridging the gap between initial evacuation and sustained vacuum maintenance.
2Reliability
If mechanical pumps are used continuously, then vacuum pressure is maintained, but energy consumption increases
Solution Approach 1:
The mechanical pump operates periodically rather than continuously, activating only when vacuum pressure thresholds are not met. A pressure sensor monitors the enclosure and triggers the mechanical pump only when needed, while the non-mechanical pump operates continuously without energy consumption to maintain vacuum between mechanical pump cycles.
Solution Approach 2:
The non-mechanical pump (getter material) provides self-service by continuously absorbing residual gases without requiring external energy input or mechanical actuation. This passive vacuum maintenance mechanism handles routine vacuum preservation, allowing the mechanical pump to remain idle and conserve energy.
3Reliability
If advanced vacuum systems are implemented, then operational limitations are reduced, but manufacturing costs increase
Solution Approach 1:
The system merges mechanical and non-mechanical vacuum technologies into a single integrated evacuation system. The mechanical pump provides robust initial evacuation, while the non-mechanical pump and molecular sieve maintain vacuum conditions, creating a cost-effective solution that leverages the strengths of multiple approaches without requiring expensive advanced vacuum systems.
Solution Approach 2:
The system uses relatively simple, cost-effective components such as getter material and molecular sieves that can be replaced if necessary, rather than investing in expensive, complex advanced vacuum systems. This approach prioritizes operational reliability through proven technologies while keeping manufacturing costs manageable.
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 evacuation system effectively maintains vacuum conditions, addressing operational limitations and cost issues of electromechanical flywheels by ensuring efficient pressure management within the flywheel enclosure.
Implementation Method 1
a mechanical vacuum pump and a non-mechanical gas removal device; the train operable to fluidly couple the casing and the evacuable housing for lowering the pressure in the evacuable housing
Implementation Method 2
getter material and molecular sieve material in a casing of the gas removal device
Implementation Method 3
getter material and molecular sieve material in a casing of the gas removal device
Data Source
AI summary
An electromechanical flywheel machine includes a flywheel mass enclosed in an evacuable housing and an e×ternal gas removal train.