Single Packing Seal Assembly With Wear Ring for Plunger Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional fluid end assemblies in high-pressure pumps experience leakage and component wear due to the use of multiple packing seals, requiring continuous maintenance and leading to erosion and eventual failure.
Innovation Solution
A single packing seal assembly with an energizing component that expands radially to ensure a tight seal, combined with a wear ring to protect the housing, simplifying installation and reducing wear on the housing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple packing seals are used in traditional fluid end assemblies, then the sealing function is provided, but leakage and component wear occur requiring continuous maintenance
Solution Approach 1:
The patent combines multiple separate packing seals into a single integrated packing seal assembly that contains multiple sealing elements arranged in series within one housing. This merging approach maintains the sealing function while reducing the number of separate components that require maintenance, directly addressing the contradiction between reliable sealing and maintenance frequency.
Solution Approach 2:
The packing seal assembly is segmented into multiple independent sealing elements within a single housing, allowing each element to function independently. This segmentation enables the system to maintain reliable sealing performance while simplifying maintenance, as the entire assembly can be replaced as one unit rather than servicing multiple separate seals.
2Reliability
If multiple packing seals are used in traditional fluid end assemblies, then the sealing function is provided, but erosion and eventual failure of components occur
Solution Approach 1:
The patent introduces a wear ring as an intermediary component between the packing seal assembly and the housing. This wear ring absorbs the erosion and wear that would otherwise affect the housing and critical components, thereby extending the duration of action of stationary objects while maintaining the sealing function.
Solution Approach 2:
The wear ring serves as a sacrificial component that is designed to wear before the housing or other critical components. This beforehand cushioning approach protects the main housing from erosion and extends the overall component life while maintaining reliable sealing performance.
3Ease of operation
If a single packing seal assembly with energizing component is used, then installation is simplified and wear is reduced, but the seal must expand radially to ensure tight sealing
Solution Approach 1:
The packing seal assembly incorporates an energizing component that dynamically adjusts the radial expansion pressure of the sealing elements. This dynamic mechanism allows the seal to automatically adjust its pressure to maintain tight sealing against the plunger, compensating for wear and ensuring continuous effective sealing without requiring excessive initial installation pressure.
Solution Approach 2:
The energizing component changes the physical parameters of the sealing elements by applying radial expansion force. This parameter change enables the seal to adapt its dimensions and pressure characteristics to maintain optimal sealing performance, simplifying installation while ensuring tight sealing through controlled radial expansion.
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 single packing seal assembly provides a more durable and efficient sealing solution, reducing maintenance needs and extending the life of the fluid end assembly components.
Implementation Method 1
The energizing component is installed within the seal and is configured to expand the inner and outer intermediate surfaces during operation
Data Source
AI summary
A fluid end assembly comprising a plurality of fluid end sections positioned in a side-by-side relationship. Each fluid end section comprises a housing having a bore formed therein for housing a reciprocating plunger. Fluid is prevented from leaking around the plunger by a packing seal assembly. The packing seal assembly comprises one and only one packing seal.