Unitary Spin-On Filter End Plate for High-Pressure Sealing
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Solution Overview
Problem
Existing spin-on filter cartridges in internal combustion engines face issues with fluid bypass due to height variations and pressure differentials, requiring separate gaskets and springs to maintain sealing, which limits maximum differential pressure and increases component size.
Innovation Solution
A single piece end plate design that integrates the functions of an end cap, nut plate, retainer ring, and gasket, eliminating the need for separate sealing members and springs, and ensuring proper sealing and fluid isolation between the dirty and clean sides of the filter element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate gaskets and springs are used to maintain sealing, then sealing reliability is improved, but device complexity increases and maximum differential pressure is limited
Solution Approach 1:
The patent combines multiple separate sealing components (gasket, spring, retainer ring, end cap, nut plate) into a single integrated end plate structure. This unitary design eliminates the need for separate sealing members and springs, reducing component count while maintaining sealing functionality through the end plate's inherent structural design that accommodates filter element height variations.
Solution Approach 2:
The end plate serves multiple functions simultaneously: it provides sealing against the filter element, accommodates height variations, maintains compression, and structures the fluid passageways. This multi-functional design replaces several specialized components with one universal structure that performs all necessary sealing and retention functions.
2Reliability
If separate gaskets and springs are used to maintain sealing, then sealing reliability is improved, but maximum differential pressure is limited
Solution Approach 1:
The integration of sealing and structural functions into the end plate eliminates the limitations of spring-based compression systems. The end plate's rigid structure can withstand higher differential pressures without fluid bypass, as it maintains sealing through its inherent design rather than relying on elastic deformation of separate spring components.
3Reliability
If separate gaskets and springs are used to maintain sealing, then sealing reliability is improved, but component size increases
Solution Approach 1:
The end plate integrates multiple functions into a single compact structure, eliminating the need for separate gaskets, springs, and retainer rings. This consolidation reduces the overall volume occupied by sealing components while maintaining all necessary sealing and retention functions within the end plate's structure.
4Device complexity
If a single piece end plate is used, then device complexity is reduced and size is minimized, but sealing reliability must be maintained
Solution Approach 1:
The end plate merges sealing, retention, and structural support functions into one component. The design incorporates sealing surfaces and fluid passageways directly into the end plate structure, ensuring reliable sealing without requiring multiple separate components. The end plate's geometry is designed to maintain consistent sealing contact with the filter element.
5Stress or pressure
If a single piece end plate is used, then maximum differential pressure capability is improved, but device complexity is reduced
Solution Approach 1:
The end plate serves as a multi-functional component that simultaneously provides sealing, structural support, and high-pressure containment. Its integrated design with internal fluid passageways and sealing surfaces enables it to withstand higher differential pressures without requiring the complex assembly of multiple specialized components.
Data Source
AI summary
A spin-on filter cartridge assembly includes a shell, a filter element, and an end plate. The shell defines an interior cavity. The filter element is disposed within the interior cavity and includes filter media. The end plate is coupled to the shell and is sealingly engaged with the filter media. The end plate retains the filter element within the interior cavity. In some embodiments, the end plate is integrally formed as a single unitary body.