Sealing Assembly for Reciprocating Pump Fastener Corrosion
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Solution Overview
Problem
High pressure reciprocating pumps face issues with fluid leakage and corrosion of coupling elements due to exposure to working fluids, leading to premature failure and increased maintenance needs.
Innovation Solution
A sealing assembly is implemented around coupler openings, featuring a compliant member such as an O-ring in a counterbore or groove, which prevents fluid from contacting the couplers and guides leaked fluid away from the coupler openings to an exterior weep area, thereby preventing corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fastening elements are used to secure components of high pressure reciprocating pumps, then the structural integrity and connection strength are improved, but the coupling elements become exposed to working fluids leading to corrosion and premature failure
Solution Approach 1:
A sealing assembly comprising a compliant member (such as an O-ring) disposed in a groove or counterbore around the coupler opening acts as an intermediary barrier. This seal prevents direct contact between the working fluid and the metallic coupler elements, thereby eliminating corrosion while maintaining the structural connection function.
Solution Approach 2:
The sealing assembly uses a flexible compliant member (elastomeric seal) that forms a thin film barrier around the coupler opening. This flexible seal deforms to maintain contact with the mating surfaces, creating an effective barrier against fluid intrusion while accommodating thermal and pressure variations.
2Stability of the object's composition
If coupling elements are exposed to working fluids for securing fluid end and power end components, then the pump assembly is held together securely, but fluid leakage and corrosion occur leading to increased maintenance needs
Solution Approach 1:
The sealing assembly serves as a protective intermediary between the working fluid and the coupler elements. By positioning the compliant seal in a groove or counterbore around the coupler opening, it mediates the interaction between fluid and metal, preventing corrosive fluid from reaching the coupling elements while allowing the assembly to remain securely connected.
Solution Approach 2:
The sealing assembly creates an inert or protected environment around the coupler elements by preventing fluid access. This effectively isolates the metallic coupling elements from the harmful working fluid environment, similar to creating an inert atmosphere that protects sensitive components from degradation.
3Strength
If multiple fasteners are used to secure the high number of components in fluid end and power end, then the structural integrity is maintained, but each connection point creates additional potential failure points
Solution Approach 1:
The sealing solution is applied segmentally to each individual coupler opening rather than requiring a complete redesign of the fastening system. Each coupler opening receives its own sealing assembly, allowing the protection to be implemented in discrete segments while maintaining the overall structural integrity of the pump assembly.
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 sealing assembly effectively extends the lifespan of couplers by preventing corrosion and reducing maintenance frequency, allowing for continuous operation and minimizing downtime in high-pressure applications like earth drilling operations.
Implementation Method 1
a compliant member (e.g., seal, O-ring, etc.) disposed in a groove, or counterbore, extending around an opening that receives a fastening element
Data Source
AI summary
A sealing assembly for a fastener of a reciprocating pump is disclosed. The sealing assembly includes a seal disposed in a contoured groove or counterbore surrounding a fastener receptacle. The seal prevents fluid from entering the fastener receptacle and corroding a fastener.