Variable Thickness Gasket for Chloralkali Sealing
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Solution Overview
Problem
Existing gaskets in electrode structures, such as those used in chloralkali processes and fuel cells, have a limited service life, requiring frequent replacement and resulting in downtime and premature refurbishment of other components.
Innovation Solution
A gasket with a closed loop of resilient material featuring varying thicknesses and a specific taper or step configuration, combined with a chemically resistant liner, to enhance sealing and durability, reducing the likelihood of liquor leakage and flange rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a conventional gasket of uniform thickness is used, then the apparatus can be assembled and operated, but the gasket fails after 3.5 to 4 years requiring replacement and downtime
Solution Approach 1:
The gasket employs varying thickness across different zones: a first thickness at the outer periphery, a third (intermediate) thickness in the middle region, and a second (minimum) thickness at the inner periphery. This non-uniform thickness distribution optimizes sealing performance at the inner periphery while maintaining structural integrity at the outer periphery, extending gasket service life beyond 4 years.
Solution Approach 2:
The invention transitions from a uniform two-dimensional gasket design to a three-dimensional design with varying thickness. The tapered or stepped configuration creates a thickness gradient that improves sealing effectiveness and distributes mechanical stresses more evenly, thereby extending operational life and reducing replacement frequency.
2Reliability
If a conventional uniform thickness gasket is used, then manufacturing is simple, but sealing effectiveness deteriorates over time leading to premature refurbishment
Solution Approach 1:
The gasket employs varying thickness across different zones: a first thickness at the outer periphery, a third (intermediate) thickness in the middle region, and a second (minimum) thickness at the inner periphery. This non-uniform thickness distribution optimizes sealing performance at the inner periphery while maintaining structural integrity at the outer periphery, extending gasket service life beyond 4 years.
Solution Approach 2:
The invention transitions from a uniform two-dimensional gasket design to a three-dimensional design with varying thickness. The tapered or stepped configuration creates a thickness gradient that improves sealing effectiveness and distributes mechanical stresses more evenly, thereby extending operational life and reducing replacement frequency.
3Reliability
If existing gaskets are replaced after 3.5 to 4 years, then reliable sealing is maintained, but production downtime occurs and other components require premature refurbishment
Solution Approach 1:
The gasket employs varying thickness across different zones: a first thickness at the outer periphery, a third (intermediate) thickness in the middle region, and a second (minimum) thickness at the inner periphery. This non-uniform thickness distribution optimizes sealing performance at the inner periphery while maintaining structural integrity at the outer periphery, extending gasket service life beyond 4 years.
Solution Approach 2:
The invention transitions from a uniform two-dimensional gasket design to a three-dimensional design with varying thickness. The tapered or stepped configuration creates a thickness gradient that improves sealing effectiveness and distributes mechanical stresses more evenly, thereby extending operational life and reducing replacement frequency.
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 gasket design significantly extends the operational life of electrode assemblies by improving sealing and reducing downtime, with tested gaskets lasting beyond 4 years without failure, compared to typical 3.5 to 4 years, and allowing for longer apparatus operation.
Implementation Method 1
a said gasket reduces in thickness from the first thickness to the third thickness and then to the second thickness via one or more tapered sections which taper linearly to a reduced thickness in the direction towards the inner periphery
Data Source
AI summary
This invention relates to gaskets, apparatus incorporating said gaskets and to methods of using them. In particular, there is provided a gasket comprising a closed loop of resilient material, the loop having an inner periphery and an outer periphery, the gasket having a first thickness at a first position which is between 0% and 30% of the gasket width away from the outer periphery, a second thickness at a second position measured at a point at least 50% of the gasket width from the first position, and a third thickness at a third position intermediate the first and second positions and at least 10% of the gasket width from each, the first thickness being greater than the third thickness which is greater than the second thickness, and wherein either a said gasket reduces in thickness from the first thickness to the third thickness and then to the second thickness via one or more tapered sections which taper linearly to a reduced thickness in the direction towards the inner periphery, or b said gasket reduces in thickness from the first thickness to the third thickness via one or more steps which step to a reduced thickness in the direction towards the inner periphery and then from the third thickness to the second thickness via one or more steps which step to a reduced thickness in the direction towards the inner periphery, or c said gasket reduces in thickness from the first thickness to the third thickness and then to the second thickness via a combination of one or more steps and one or more tapered sections as defined above.