Plunger Pump Spring Stability via Segmented Winding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In plunger pumps, the coiled spring's small outer diameter relative to the cylinder hole and lid member leads to instability and potential deviation, affecting the pump's performance and requiring additional manufacturing steps for end reception.
Innovation Solution
A plunger pump design with a cylinder hole having reduced and expanded sections, where the coiled spring is compressed and stretched within the expanded section, featuring a lid-side seat winding section with a larger diameter for stability and a plunger-side seat winding section with a smaller diameter for reduced friction, allowing the coiled spring to be centered and maintaining stability without additional end reception sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coiled spring has a uniform diameter approximately the same as the plunger outer diameter, then the spring can fit within the cylinder hole, but the spring becomes unstable and may deviate in the radial direction of the lid member
Solution Approach 1:
The coiled spring is divided into three sections with different outer diameters: a first section (seat winding section) with a smaller outer diameter for fitting on the plunger, a second section (effective winding section) with a larger outer diameter for generating spring force, and a third section (seat winding section) with a smaller outer diameter for fitting on the lid member. This segmentation allows the spring to remain stable while maintaining adequate spring force.
2Force
If the effective winding section has a larger outer diameter to increase spring force, then the spring force is improved, but the spring may contact and rub against the inner circumferential surface of the expanded diameter section
Solution Approach 1:
Different sections of the coiled spring have different outer diameters tailored to their specific functions. The effective winding section has a larger outer diameter optimized for spring force generation, while the seat winding sections have smaller outer diameters optimized for fitting and stability. This local quality variation allows the spring to achieve maximum spring force without harmful contact with the cylinder wall.
3Reliability
If additional end reception sections are added to the plunger and lid member to secure the spring ends, then spring stability is improved, but manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The coiled spring's own structure (with its three different diameter sections) provides the positioning and securing function that would otherwise require additional components. The smaller outer diameter seat winding sections naturally fit onto the plunger and lid member surfaces, eliminating the need for separate end reception sections and simplifying both manufacturing and 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 design enhances the stability and alignment of the coiled spring within the pump chamber, reducing manufacturing costs and improving assembly workability while maintaining increased spring force and preventing contact with the inner surface.
Implementation Method 1
a coiled spring (50) disposed within the expanded diameter section (11)... an effective winding section (51) compressible and stretchable in the axial direction of the plunger (40)
Data Source
AI summary
A plunger pump is provided which comprises: a pump body having a cylinder hole with an expanded diameter section; a plunger defining, together with the lid member, a pump chamber; and a coiled spring disposed within the expanded diameter section. The coiled spring includes: an effective winding section; a lid-side seat winding section; and a plunger-side seat winding section. The lid-side seat winding section has an outer diameter larger than an outer diameter of the effective winding section, and the plunger-side seat winding section has an outer diameter smaller than an outer diameter of the plunger. With this configuration, the coiled spring within the pump chamber can have increased stability, and can be located in the center of the pump chamber.