Floating Scroll Seal with Biasing Chamber for Leakage Control
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Solution Overview
Problem
Compressors in climate-control systems face inefficiencies due to the lack of effective sealing mechanisms that prevent fluid leakage and ensure reliable operation across varying pressure regions.
Innovation Solution
A compressor design incorporating a floating seal with annular grooves and a biasing chamber, which creates a tortuous leakage path to minimize fluid flow between pressure regions, reducing friction and wear while maintaining efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional sealing mechanism is used in the compressor, then the structure is simple, but fluid leakage occurs between discharge-pressure and suction-pressure regions leading to capacity loss
Solution Approach 1:
The seal is divided into multiple functional segments including a biasing chamber, annular grooves, and sealing surfaces that work together to create effective sealing without requiring a complex overall structure. The segmentation allows each component to perform its specific function optimally.
Solution Approach 2:
The floating seal acts as an intermediary element between the discharge-pressure and suction-pressure regions, using the biasing chamber and annular grooves to mediate fluid flow and prevent direct leakage while maintaining system simplicity.
2Loss of substance
If a floating seal with biasing chamber is used, then fluid leakage is minimized, but friction and wear increase
Solution Approach 1:
The biasing chamber uses pneumatic pressure from the intermediate-pressure fluid pocket to automatically position the seal, creating a self-regulating system that maintains sealing effectiveness while minimizing contact friction through pressure-balanced positioning.
Solution Approach 2:
The seal design changes the pressure parameters by creating an intermediate-pressure region in the biasing chamber, which balances the forces acting on the seal and reduces wear while maintaining leakage prevention.
3Reliability
If the seal tightly engages the partition to prevent leakage, then sealing improves, but operational flexibility and adaptation to pressure variations decrease
Solution Approach 1:
The floating seal design allows dynamic adjustment of the seal position based on varying pressure conditions. The biasing chamber enables the seal to move and adapt automatically to different operating pressures while maintaining reliable sealing throughout the range of variations.
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 effectively seals the discharge-pressure and suction-pressure regions, minimizing leakage and compressor capacity loss, thereby enhancing operational efficiency and extending the lifespan of components.
Implementation Method 1
The biasing chamber may be in communication with one of the fluid pockets via the biasing passage when the one of the fluid pockets is at the radially intermediate position
Implementation Method 2
which creates a tortuous leakage path to minimize fluid flow between pressure regions
Data Source
AI summary
A compressor may include first and second scrolls and a seal. The first scroll includes a first end plate and a first spiral wrap extending from the first end plate. The first end plate may define a discharge passage and an annular recess surrounding the discharge passage. The second scroll includes a second end plate and a second spiral wrap extending from the second end plate. The first and second spiral wraps cooperate to define a plurality of fluid pockets. The seal may be at least partially received in the annular recess and may cooperate with the first scroll to define a biasing chamber receiving fluid at an intermediate pressure. The seal may include inner and outer diametrical surfaces. The inner diametrical surface may include a plurality of first annular grooves. The outer diametrical surface may include a plurality of second annular grooves.