Ceramic Fluid Resistance Element With Metal Crimp Fixation
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Solution Overview
Problem
Conventional ceramic fluid resistance elements are difficult to fix to channels due to their non-deformable nature, making it challenging to utilize their benefits such as near-zero thermal expansion, high hardness, and excellent heat and corrosion resistance effectively.
Innovation Solution
A ceramic channel delineating member is covered with a metal covering member that has a bulged portion on its inner surface, allowing for reliable fixation by crimping and welding, while maintaining the benefits of ceramic materials like near-zero thermal expansion and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a ceramic fluid resistance element is used, then measurement precision and heat/corrosion resistance are improved, but ease of manufacture and fixation difficulty worsen
Solution Approach 1:
The invention creates a composite structure by combining a ceramic channel delineating member with a metal covering member. The ceramic component provides measurement precision and chemical stability, while the metal covering member provides deformability for fixation. This composite approach resolves the contradiction by allowing each material to contribute its advantageous properties.
Solution Approach 2:
The fluid resistance element is divided into two functional segments: a ceramic channel delineating member for precise flow control and measurement, and a separate metal covering member for fixation purposes. This segmentation allows each part to be optimized for its specific function without compromising the other.
2Reliability
If a ceramic channel delineating member is used, then heat resistance and corrosion resistance are improved, but adaptability to fixation methods worsens
Solution Approach 1:
The metal covering member is applied over the ceramic channel delineating member to create a composite structure. The metal layer provides adaptability to various fixation methods (crimping, welding, interference fitting) while the underlying ceramic maintains its superior heat and corrosion resistance properties.
Solution Approach 2:
The metal covering member acts as an intermediary between the ceramic channel delineating member and the external fixation environment. It provides the mechanical compliance and surface properties needed for various fixation methods while protecting and supporting the fragile ceramic component.
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 solution enables stable and accurate fixation of ceramic fluid resistance elements, allowing for precise flow rate measurements and improved workability, while ensuring the benefits of ceramic materials like low thermal expansion and corrosion resistance are maintained.
Implementation Method 1
by applying a radial force from the outer side and crimping the covering member made from a metal, to form the bulged portion on the inner peripheral surface of the covering member
Implementation Method 2
By then fixing the covering member made from a metal to another tube member by welding, for example, the fluid resistance element can be fixed to a desirable position of a channel
Data Source
AI summary
In order to allow a fluid resistance element to be fixed to the channel while enjoying various benefits of a channel delineating member made from a ceramic, the fluid resistance element includes: a channel delineating member made from a ceramic and having one or a plurality of resistance channels; and a covering member made from a metal and covering an outer peripheral surface of the channel delineating member. The covering member has a bulged portion on an inner peripheral surface of the covering member, the bulged portion bulging toward the outer peripheral surface of the channel delineating member.