Spring-Energized Seal Retention in Housing Cavities
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Solution Overview
Problem
Conventional face seals in static applications face issues with additional hardware requirements, manufacturing tolerance problems, and thermal expansion, leading to potential seal failure due to loose or incorrectly positioned sealing components.
Innovation Solution
The integration of a spring energizer within the sealing component that can self-retain within a housing groove, eliminating the need for additional hardware and accommodating wider tolerances and vibrations through deflection, thereby maintaining the seal assembly's integrity across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional hardware such as retaining pins or clips are used to retain the seal, then the seal can be retained in place, but the assembly complexity increases and costs increase
Solution Approach 1:
The spring energizer is integrated directly into the seal assembly, combining the sealing function and the retention function into a single component. The spring energizer acts as both the sealing element and the retaining mechanism, eliminating the need for separate retaining pins or clips.
Solution Approach 2:
The spring energizer automatically retains the seal assembly in place through its own elastic deformation capability. The spring's inherent elasticity allows it to engage with the housing cavity and maintain the seal position without requiring additional retention hardware.
2Reliability
If conventional face seals are used with additional hardware, then the seal can be retained, but manufacturing tolerance issues arise between the sealing component and housing
Solution Approach 1:
The spring energizer's elastic properties allow it to accommodate variations in manufacturing tolerances. The spring can deform to compensate for dimensional variations between the seal assembly and housing, maintaining reliable retention across a wider tolerance range.
Solution Approach 2:
The spring energizer introduces dynamic capability to the seal assembly, allowing it to adapt its position and shape in response to manufacturing variations. The elastic deformation of the spring enables the assembly to self-adjust to fit within the housing cavity despite tolerance variations.
3Ease of manufacture
If conventional face seals are used, then the seal can be installed, but thermal expansion and vibration cause the seal to become loose and fail
Solution Approach 1:
The spring energizer provides dynamic retention capability that allows the seal assembly to maintain its position under varying thermal and vibrational conditions. The spring's elasticity enables it to continuously adapt to dimensional changes caused by thermal expansion and contraction, as well as to absorb vibrational forces.
Solution Approach 2:
The spring energizer acts as a cushioning element that anticipates and absorbs the effects of thermal expansion and vibration before they can cause seal failure. The elastic deformation of the spring provides a buffer that protects the seal from the harmful effects of environmental 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
This solution reduces the number of components needed, enhances assembly reliability by allowing wider tolerance ranges, and maintains sealing effectiveness during thermal changes and vibrations, ensuring the seal assembly remains securely in place without additional hardware.
Implementation Method 1
usage of spring energizer as a means of retention can accommodate for a wider tolerance range, thermal effects, and vibration due to the spring energizer's ability to deflect
Data Source
Figure 1~2
Figure 3~4
Figure 4A~5A
AI summary
Seal assemblies in which a seal member (106, 108) having an energizer (162) located in a seal body groove is positioned inside a housing cavity (130) of a housing are disclosed. The sealing member (106, 108) and the energizer (162), which can be an O-ring or a spring energizer, can be retained inside the housing cavity (130) by positioning a portion of the energizer (162) in a groove in the housing cavity (130) in a locking or latching engagement. Methods of making and using seal assemblies are also disclosed.