Reciprocating Pump Sealing Collar Corrosion Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional reciprocating pumps experience corrosion and wear in the manifold due to the liquid being pumped, leading to sealing defects, leakage, and increased pressure oscillation, which lowers their performance.
Innovation Solution
A reciprocating pump design that incorporates a collar made of a material with higher corrosion and wear resistance than the manifold, which is liquid-tightly attached to the manifold and in contact with the sealing members, preventing corrosion and wear at these points, thereby maintaining the sealing function and reducing leakage and pressure oscillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the manifold is made of corrosion-resistant material throughout, then corrosion resistance is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies local quality by providing corrosion-resistant collars only at specific locations where sealing members contact the manifold (inner face of the manifold or channel), rather than making the entire manifold corrosion-resistant. This localized application of corrosion-resistant material prevents corrosion at critical sealing interfaces while reducing overall manufacturing cost compared to a fully corrosion-resistant manifold.
Solution Approach 2:
The patent segments the corrosion protection function by separating the manifold body from the corrosion-resistant collars. The collars are distinct components that can be separately manufactured and attached to the manifold, allowing selective corrosion protection only where sealing members contact the manifold, thus optimizing both reliability and cost.
2Reliability
If the sealing member continuously contacts the corroding manifold, then sealing function deteriorates due to corrosion, but adding corrosion-resistant collar increases device complexity
Solution Approach 1:
The patent introduces a collar as an intermediary component between the sealing member and the manifold. This collar serves as a mediator that protects the sealing member from direct contact with corrosive liquid, thereby maintaining the sealing function. The collar is a relatively simple structural element that can be attached to the manifold, providing corrosion protection without significantly increasing device complexity.
3Duration of action of stationary object
If corrosion-resistant material is used for the entire manifold, then durability is improved, but material cost and manufacturing complexity increase
Solution Approach 1:
The patent applies local quality by providing corrosion-resistant collars only at specific locations where sealing members contact the manifold (inner face of the manifold or channel), rather than making the entire manifold corrosion-resistant. This localized application of corrosion-resistant material prevents corrosion at critical sealing interfaces while reducing overall manufacturing cost and complexity compared to a fully corrosion-resistant manifold.
Data Source
AI summary
An objective is to provide a reciprocating pump kept from lowering its performances, while restraining the cost from increasing.Collars 14, 20, 21 made of a material more excellent in resistance to corrosion than a manifold 3 are interposed between the manifold 3 and sealing members 10, 22, 23 for liquid-tightly sealing the manifold 3, so as to prevent the parts in contact with the sealing members 10, 22, 23 from being corroded by a liquid for use, and fully exhibit sealing functions, thereby preventing leakage from occurring in a pump chamber 4 and the pressure oscillation from being increased by the leakage, while the collars 14, 20, 21 made of the material excellent in resistance to leakage are used only in the parts in contact with the sealing members 10, 22, 23.