Seal Assembly Shroud Protects Biasing Element
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Solution Overview
Problem
Existing seal assemblies for rotatable components in high-pressure applications, such as wastewater treatment and food processing, face challenges in maintaining effective sealing due to trapped materials interfering with the operation and sealing efficiency, particularly under high pressure conditions.
Innovation Solution
A robust seal assembly comprising a sleeve, a dynamic race, a biasing element, and a shroud, where the biasing element urges the dynamic race into engagement with a static race to form a primary seal, and a sealing element positioned radially inside the biasing element to create a secondary seal, preventing fluid bypass, with the shroud protecting the biasing element from fibrous materials and ensuring proper operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single seal configuration is used, then the device complexity is low, but the sealing reliability deteriorates under high pressure conditions
Solution Approach 1:
The seal assembly is divided into two distinct sealing systems: a primary seal (dynamic seal) that handles general sealing, and a secondary seal (static seal) that provides backup sealing. This segmentation allows each seal to be optimized for its specific function, improving overall sealing reliability without requiring complete redesign of a single complex seal system.
Solution Approach 2:
The patent introduces a radial dimension to the sealing strategy by placing the secondary static seal radially inward of the primary dynamic seal. This dimensional arrangement creates a redundant sealing path that activates when the primary seal fails, thereby improving reliability without significantly increasing axial or lateral complexity.
2Reliability
If the biasing element is exposed to fibrous materials, then the device complexity is low, but the operation reliability deteriorates due to material interference
Solution Approach 1:
A shroud is introduced as an intermediary protective component that shields the biasing element from direct contact with fibrous materials in the processed fluid. The shroud acts as a barrier that allows the biasing element to maintain its function without being contaminated or obstructed by external materials, thereby protecting operational reliability.
3Productivity
If high pressure material is processed, then the productivity is high, but the sealing efficiency deteriorates due to trapped materials
Solution Approach 1:
The secondary static seal is pre-positioned radially inward of the primary dynamic seal, creating a predetermined backup sealing path. This preliminary arrangement ensures that when high-pressure trapped materials interfere with the primary seal, the secondary seal is already in place to maintain sealing efficiency without interrupting material processing.
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 effectively isolates high-pressure materials, maintains sealing efficiency, and prevents fibrous materials from interfering with operation, ensuring reliable sealing and free rotation of the rotatable components, even under rigorous conditions.
Implementation Method 1
a biasing element configured to urge the dynamic race into engagement with a static race to form a primary seal
Implementation Method 2
a sealing element configured to be positioned radially inside the biasing element and to sealingly engage the sleeve to provide a secondary seal
Data Source
AI summary
A seal system including a sleeve configured to receive a rotatable shaft therein and a dynamic race configured to be rotatably coupled to the shaft. The seal system further includes a biasing element configured to urge the dynamic race into engagement with a static race to form a primary seal, and a shroud configured to be rotatably coupled to the sleeve and positioned radially outside the biasing element. The seal system also includes a sealing element configured to be positioned radially inside the biasing element and to sealingly engage the sleeve to provide a secondary seal to generally block fluid bypassing the primary seal.