Fluoropolymer Compressor Cup Seal for Low-Wear Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Seals in compressors experience significant wear due to relative movement between components, leading to premature failure and reduced lifespan, necessitating improvements in seal technology to enhance durability and longevity.
Innovation Solution
An annular seal design featuring a substantially planar portion, a first angled portion extending radially at an angle β from the planar portion, and a second angled portion extending radially at an angle α from the first angled portion, formed from a fluorinated polymer and additives such as carbon, graphite, or molybdenum disulfide, which reduces wear and extends the seal's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional seal materials and designs are used, then manufacturing is simpler and cost is lower, but wear resistance is insufficient and lifespan is reduced
Solution Approach 1:
The seal employs a composite structure consisting of a fluoropolymer base material combined with specific additives (carbon, graphite, or molybdenum disulfide) to achieve superior wear resistance. This composite approach allows the seal to maintain the chemical inertness and low friction properties of fluoropolymers while incorporating the excellent lubrication and wear resistance of the additive materials, thereby extending seal lifespan without requiring complex mechanical designs.
Solution Approach 2:
The seal incorporates angled portions (first angled portion and second angled portion) that create curved or inclined surfaces rather than purely flat contact areas. These angled portions facilitate smoother engagement and reduced stress concentration during installation and operation, contributing to extended seal life while maintaining a relatively simple overall structure.
2Reliability
If seals are designed for high durability, then wear resistance improves, but manufacturing complexity increases
Solution Approach 1:
The seal is manufactured as a composite material system where a fluoropolymer matrix is combined with dispersed additive particles (carbon, graphite, or molybdenum disulfide). This composite approach achieves high wear resistance through the inherent properties of the materials rather than through complex manufacturing processes. The additives are incorporated during molding, allowing standard manufacturing techniques to produce durable seals without requiring additional assembly steps or complex processing.
Solution Approach 2:
The invention achieves enhanced wear resistance by modifying the chemical composition parameters of the seal material rather than changing the fundamental manufacturing process. By adjusting the types and concentrations of additives (carbon, graphite, molybdenum disulfide) within the fluoropolymer matrix, optimal wear resistance is achieved while maintaining compatibility with conventional seal manufacturing methods such as injection molding or compression molding.
3Duration of action of moving object
If conventional seal materials are used, then manufacturing is easier, but wear rate is high and operational life is shortened
Solution Approach 1:
The seal utilizes a composite formulation where fluoropolymer provides the base structure with chemical stability, while embedded additives (carbon, graphite, or molybdenum disulfide) provide lubrication and wear protection. This composite structure significantly reduces the wear rate compared to conventional single-material seals, extending operational life to exceed 10,000 hours at 1000 strokes per minute while maintaining manufacturability through standard molding processes.
Solution Approach 2:
The seal incorporates self-lubricating properties through the inclusion of solid lubricant additives (graphite or molybdenum disulfide) within the fluoropolymer matrix. These additives provide inherent lubrication during operation, reducing friction and wear without requiring external lubrication systems or break-in periods. The seal effectively lubricates itself during operation, minimizing material loss and extending service life.
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 annular seal exhibits reduced wear and increased lifespan, maintaining a fluid-tight seal and eliminating the need for a break-in period, with wear rates less than 0.07 mm per 1000 hours and operational life exceeding 10,000 hours at 1000 strokes per minute.
Implementation Method 1
formed from a fluorinated polymer and at least one additive or filler... exhibits reduced wear and an increased lifespan
Data Source
AI summary
The subject application relates to a cupseal for a compressor and method for preparing the same. Systems and methods are disclosed that include providing an annular seal for a compressor. The annular seal includes a substantially planar first portion, a first angled portion extending at an angle from the substantially planar first portion, and a second angled portion extending radially at an angle from the first angled portion. The annular seal is formed from a fluorinated polymer and includes at least one additive or filler. The annular seal exhibits reduced wear and an increased lifespan.