Pump Core Plastic Spring Structure for Stable Vacuum Sealing
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Solution Overview
Problem
Existing vacuum pumps with spring sealing in pump core assemblies face challenges in automatic assembly and production, one-piece plastic production, and recycling due to unstable springs and complex structural designs, leading to issues like liquid leakage and poor stability under high viscosity and hydraulic pressure.
Innovation Solution
A vacuum pump design featuring a one-piece plastic structure with a modified plastic spring having a multi-section, tower-like, corrugated cylinder and 'W-shaped' outer ring, ensuring stable sealing and easy assembly, and a snap-fitting mechanism that secures the spring in place, allowing for easy recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional spring sealing structure is used in the pump core assembly, then the sealing function is provided, but the spring is unstable and susceptible to impact during automatic assembly and production
Solution Approach 1:
The patent changes the material parameter from traditional metal spring to plastic spring, and changes the structural parameter from simple coil spring to multi-section tower-like corrugated cylinder structure with W-shaped outer ring. This structural transformation maintains sealing reliability while improving stability and resistance to impact during automatic assembly.
Solution Approach 2:
The patent uses composite structural design combining plastic material with specific geometric features (corrugated cylinder, W-shaped ring, ribs). This composite approach creates a spring that integrates sealing, stabilizing, and anti-impact functions into a single plastic component, resolving the contradiction between reliability and ease of manufacture.
2Reliability
If a complex structural design is used to ensure sealing, then sealing performance is improved, but the device complexity increases and recycling becomes difficult
Solution Approach 1:
The patent merges multiple functions (sealing, stabilizing, anti-impact, and structural support) into a single integrated plastic spring component. The multi-section tower-like corrugated cylinder with W-shaped outer ring combines these functions without requiring separate components, thereby improving sealing performance while reducing overall device complexity and enabling easier recycling.
3Reliability
If a stable spring sealing is implemented, then liquid leakage is reduced, but the manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent adopts a disposable plastic spring component that can be easily manufactured through injection molding. The single-material plastic construction allows for cost-effective mass production and automatic assembly, reducing manufacturing costs while maintaining reliable liquid leakage prevention through the integrated sealing structure.
Solution Approach 2:
Changing from metal spring to plastic material, and from simple coil structure to multi-section corrugated tower with W-shaped ring, creates a sealing structure that is both effective at preventing liquid leakage and economical to manufacture through standard plastic molding processes.
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 provides enhanced stability, improved sealing performance, and ease of assembly, with reduced liquid leakage and skewing issues, while being eco-friendly and cost-effective through recyclable materials.
Implementation Method 1
a plastic spring (11) joined to the pump core assembly, wherein a multi-section, tower-like, corrugated cylinder with a 'W-shaped' outer ring is disposed in an area between the outwardly flipped groove of the valve stem and the outer ring edge plane of the inner plug
Implementation Method 2
a snap-fitting mechanism that secures the spring in place
Data Source
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AI summary
The present invention relates to vacuum pump, to the extent that the difficulties of putting similar products in automatic assembly and production and the technical issues of carrying out one-piece plastic production, assembly and recycling would be resolved. A pump core assembly, the pump body of the pump core assembly is provided with an elastic sleeve, the inner diameter of the upper plug of the first inner plug outwardly of the pump body is provided with a lower elastic cavity that is larger than the inner diameter of the plug, the inner diameter hole of the upper plug of the first inner plug is provided with the upper elastic cavity of the outer diameter of the first valve stem whose outer diameter is smaller than the inner diameter of the upper plug. The spring is substituted by the first plastic spring, the said first valve stem is substituted by the second valve stem, or the said large ring is substituted by an inner ring, an outer guard and a rotating ring, the spring is substituted by the second plastic spring.