Composite Valve Member Assembly for Erosion-Resistant Sealing
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Solution Overview
Problem
In hydraulic fracturing systems, the valve seats and valve members in pump systems are prone to erosion and damage due to the presence of particulates and corrosive fluids, leading to sealing issues and increased maintenance costs.
Innovation Solution
The development of a valve member design that includes an upper portion with an annular recess and guide legs with a coupling member, where the sealing element is installed within the recess and the components are assembled using a single force application process, allowing for separate material and method usage for the sealing element and guide legs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If valve members are made from single material construction, then manufacturing is simpler, but durability against erosion and corrosion is reduced
Solution Approach 1:
The valve member is constructed using composite materials, specifically a metal body (such as stainless steel or nickel alloy) combined with a polymer sealing element (such as PTFE or elastomer). This composite construction provides both structural strength to resist erosion and corrosion, while the polymer sealing element provides enhanced sealing performance and resistance to chemical degradation from particulates and corrosive fluids.
Solution Approach 2:
The valve member is divided into separate segments or components: a metal body portion and a separate polymer sealing element. These segments can be manufactured independently using appropriate processes for each material, then assembled together. This segmentation allows each component to be optimized for its specific function and material properties.
2Reliability
If valve seats and valve members are made from same material, then manufacturing is easier, but sealing effectiveness is reduced due to erosion
Solution Approach 1:
Different materials are used for different portions of the valve member based on local requirements: the metal body provides structural integrity and erosion resistance in high-stress areas, while the polymer sealing element provides enhanced sealing properties at the sealing surface where contact with the valve seat occurs. This local differentiation of material properties optimizes both sealing effectiveness and durability.
3Manufacturing precision
If multiple assembly steps are used, then component positioning is more precise, but assembly time and complexity increase
Solution Approach 1:
Multiple assembly operations are merged into a single integrated assembly step. The valve member components (metal body and polymer sealing element) are designed with features that allow simultaneous positioning and securing in one assembly action, eliminating the need for separate positioning, securing, and sealing steps. This reduces assembly complexity and improves productivity while maintaining precision through built-in alignment features.
Data Source
AI summary
A valve assembly includes an upper portion to be coupled to guide legs, a cavity being formed within one of the upper portion or the guide legs and a coupling member being associated with the other of the upper portion or the guide legs, wherein the upper portion is coupled to the guide legs via a single force application process.