Double-Contact Seal Assembly for Flexible Centrifugal Separator Outlets
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Solution Overview
Problem
Centrifugal separators face challenges with complex and cumbersome hermetic outlet seals that are designed for specific liquid phases, requiring multiple variants for different applications, which complicates assembly, maintenance, and flexibility in handling both light and heavy liquid phases.
Innovation Solution
A seal assembly featuring a rotatable and stationary sealing ring configuration with a double-contact seal and fluid connections, allowing for easy assembly and disassembly, and capable of forming a hermetic seal between zones, facilitating the handling of both light and heavy liquid phases without the need for multiple outlet designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hermetic outlet seals are designed for specific liquid phases (light-phase or heavy-phase), then the seal performance for the dominating phase is improved, but the device complexity increases due to needing multiple outlet variants for different applications
Solution Approach 1:
The seal assembly is designed with a universal structure that can handle both light-phase and heavy-phase liquid separations. The stationary sealing member with its specific geometry and the rotatable sealing member work together to create a seal that adapts to different operating conditions, eliminating the need for separate outlet designs for purifier and concentrator applications.
Solution Approach 2:
The seal assembly is divided into distinct components: a stationary sealing member and a rotatable sealing member. This segmentation allows each component to be optimized for its specific function while working together to achieve universal applicability. The stationary sealing member provides the sealing surface while the rotatable member follows it, creating a modular system that can handle different phases.
2Ease of manufacture
If traditional hermetic outlet seals are designed with focus on one liquid phase, then the ease of manufacture is improved for that specific application, but the adaptability decreases when switching between purifier and concentrator modes
Solution Approach 1:
The seal assembly design achieves universality by creating a single structure that can be used in both purifier and concentrator modes. The stationary sealing member's geometry and the interaction with the rotatable sealing member allow the same assembly to effectively seal both light-phase and heavy-phase outlets, providing manufacturing simplicity while maintaining adaptability.
3Reliability
If complex hermetic outlet seals with many parts are used, then the seal reliability is improved, but the ease of operation decreases due to difficult assembly and maintenance
Solution Approach 1:
The seal assembly is segmented into two main components: a stationary sealing member and a rotatable sealing member. This segmentation simplifies the overall structure compared to traditional multi-part designs while maintaining hermetic reliability. The divided structure allows for easier assembly and maintenance, as each component can be independently handled and replaced if needed.
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 seal assembly provides a compact, easy-to-assemble solution that maintains a hermetic seal, reduces leakage risk, and allows for flexible operation in both purifier and concentrator modes, handling large portions of separated liquid phases efficiently without the need for multiple outlet configurations.
Implementation Method 1
a double contact seal having at least one chamber arranged at the radial plane is formed upon engagement between the first and second sealing rings
Implementation Method 2
During operation, fluid mixture that is about to be separated is introduced into a rotating bowl and due to the centrifugal forces, heavy particles or denser liquid, such as water, accumulates at the periphery of the rotating bowl whereas less dense liquid accumulates closer to the central axis of rotation
Data Source
AI summary
A seal assembly for providing a seal between a first zone and a second zone includes a rotatable sealing member including a first sealing ring, a stationary sealing member including a second sealing ring and a device for bringing the first and second sealing rings into engagement with each other. The first and second sealing rings are arranged so that a double contact seal having at least one chamber arranged at a radial plane is formed upon engagement between the first and second sealing rings. The seal assembly further includes at least one fluid connection to the chamber. A centrifugal separator includes such a seal assembly.