Pump Rod and Drive Link Geometry for Reduced Side Loading
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Solution Overview
Problem
Axial displacement pumps in fluid dispensing systems face challenges with time-intensive mounting and detaching processes, and experience wear due to misaligned driving forces, which affect efficiency and lifespan.
Innovation Solution
The design incorporates a pump rod with a load concentrating feature and a driving link system that includes a U-shaped flange and cavity configuration to secure the pump rod, aligning forces with the centerline and reducing side loading, along with a clamping mechanism using an axial ring and tightening ring for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump rod is pinned to the reciprocating drive, then the pump rod is securely attached to the driving mechanism, but the mounting and detaching process becomes time-intensive and requires loose parts and several tools
Solution Approach 1:
The pump rod head is integrated directly with the pump rod shaft, eliminating the need for separate pins and loose parts. The head includes a built-in cavity that receives the driving link, creating a unified structure that simplifies both mounting and detaching operations while maintaining secure attachment.
2Reliability
If the pump rod is pinned to the reciprocating drive, then the connection is secure, but the process requires several tools and loose parts
Solution Approach 1:
The pump rod head combines multiple functions into a single integrated component: it serves as the connection interface with the driving link, provides structural support, and eliminates the need for separate pins and fasteners. This integration reduces device complexity by removing loose parts and minimizing tool requirements.
3Adaptability or versatility
If the pump rod experiences driving forces not coincident with the centerline, then the pump can handle off-center loads, but the pump rod experiences wear on various components
Solution Approach 1:
The load concentrating feature acts as an intermediary element between the driving link and the pump rod shaft. It provides a dedicated contact point that concentrates and directs loads through the head structure, mediating the force transmission to minimize wear on the pump rod and its components while maintaining the ability to handle off-center loads.
4Object-affected harmful factors
If a load concentrating feature is added to the pump rod head, then side loading is reduced and component wear decreases, but the device complexity increases
Solution Approach 1:
The load concentrating feature is integrated directly into the pump rod head structure rather than being a separate component. This merging approach reduces device complexity by combining the load concentration function with the existing head structure, eliminating the need for additional parts while still providing the beneficial wear-reducing effects.
Data Source
AI summary
A displacement pump is configured to mount to a drive housing. A reciprocating drive is connectable to a pump rod of the displacement pump and includes a connecting rod and a drive link that receives a head of the pump rod. A flange projects from a pump body of the pump and a ring projects from the pump body of the pump. A portion of the drive housing is received in a gap between the flange and the ring.