Spring-Energized Seal Assembly for Cleanable Dynamic Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Seals for rotary and oscillating applications face challenges in maintaining dynamic sealing while preventing dust and debris accumulation, particularly in configurations like canted coil spring energized seals, which complicate cleanability and expose areas to contaminants.
Innovation Solution
A seal assembly comprising a sealing component with two flanges, a cover flange, and a spring energizer, such as a canted coil spring or V-spring, that provides a load to seal lips for effective sealing between surfaces, with flange overhangs and a support band to protect the seal cavity from external contaminants, allowing for easy cleaning and interference fit with structural components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If canted coil spring energized seals are used in axial face seal configuration, then sealing force is provided to seal lips, but dust and debris can accumulate in the seal cavity and cleanability is compromised
Solution Approach 1:
The spring energizer is extracted from the traditional enclosed seal cavity and repositioned to extend externally toward the centerline of the sealing component. This extraction allows the spring to be accessible from the exterior, enabling easy cleaning of the seal assembly while maintaining its energizing function on the seal lips.
Solution Approach 2:
The spring energizer is repositioned from a purely axial orientation within the seal cavity to an extended configuration that reaches toward the centerline. This dimensional change allows the spring to maintain contact with the seal lips while exposing previously hidden surfaces for cleaning access.
2Object-affected harmful factors
If flange overhangs are added to cover the seal cavity and spring energizer, then protection from contaminants is improved, but device complexity increases
Solution Approach 1:
The flange overhangs serve multiple functions: they provide structural support for the extended spring energizer, create a protective barrier against contaminants, and maintain the axial spacing between sealing surfaces. By combining these functions into a single structural feature, complexity is minimized while achieving multiple protective benefits.
3Ease of operation
If the spring energizer extends externally toward the centerline, then cleanability is improved, but the spring may be more exposed to external environment
Solution Approach 1:
The flange overhangs provide localized protection specifically over the spring energizer and seal cavity areas, creating a micro-environment that shields these components from contaminants while allowing the spring to extend externally for cleaning access. This localized shielding approach maintains cleanability while reducing environmental exposure.
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 maintains dynamic sealing, prevents contaminant accumulation, and facilitates easy cleaning by providing a protected environment for the spring energizer and seal cavity, ensuring reliable operation in contaminated environments.
Implementation Method 1
said spring energizer positioned within said seal cavity for biasing the two sealing flanges away from one another to provide a load onto said seal lips
Data Source
AI summary
A seal assembly can include a sealing component and a spring energizer located within a seal cavity or spring cavity of the sealing component. The sealing component provides an exterior surface for providing protection of the seal cavity and spring energizer from an external or contaminated environment, such as the atmosphere. The sealing component can have two distinct first and second sealing points. Each distinct first sealing point can have two discrete first sealing points and each second sealing point can have two discrete second sealing points. Part of the spring energizer can extend externally of the sealing component.