Lubricated Polymer Screw Pump Components for Wear and Vibration
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Solution Overview
Problem
Existing screw pump designs suffer from performance limitations that can be improved, particularly in terms of efficiency and durability.
Innovation Solution
The use of lubricated polymer materials, such as polyphenylene sulfide, for at least one screw and/or the casing components of the screw pump, along with fiber reinforcement and specific design features like anti-rotation protrusions and flexible couplings, enhances the performance and reduces vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional screw pump designs are used, then the structure is simple and easy to manufacture, but the efficiency and durability are limited
Solution Approach 1:
The patent applies composite materials by incorporating lubricated polymer material (such as polyphenylene sulfide with PTFE) into the screw components. This composite structure combines the mechanical strength of polymer base material with the low-friction properties of lubricant particles, achieving improved efficiency and reduced wear without significantly complicating the manufacturing process
Solution Approach 2:
The patent changes the material parameters of the screw components by specifying particular polymer materials with defined lubricant content (e.g., PTFE particles at specific concentrations). This parameter optimization enables better fluid flow characteristics and reduced friction, directly improving pump efficiency while maintaining manufacturability
2Reliability
If traditional screw pump designs are used, then the manufacturing process is simple, but the durability is limited due to wear and tear
Solution Approach 1:
The lubricated polymer composite material provides enhanced durability through the lubricant particles (such as PTFE) that reduce friction and wear between moving parts. This composite approach maintains relatively simple manufacturing processes while dramatically improving component life and reliability
Solution Approach 2:
The lubricated polymer material provides self-lubrication properties, where the lubricant particles are embedded within the polymer matrix and automatically provide lubrication during operation. This self-service lubrication mechanism reduces wear and extends durability without requiring external lubrication systems or complex maintenance procedures
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 lubricated polymer materials and design enhancements lead to improved efficiency, reduced vibrations, and enhanced durability of the screw pump, allowing for better fluid flow and reduced wear and tear.
Implementation Method 1
at least one of the screws comprises a lubricated polymer material
Implementation Method 2
The lubricant may comprise one of polytetrafluorethylene (PTFE), molybdenum disulfide and carbon or graphite
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The disclosure relates to a screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet; and at least two screws (4, 5, 6) housed in the flow chamber to force a fluid flow through the flow chamber from the inlet to the outlet; wherein at least one of the screws (5, 6) comprises a lubricated polymer material.