Filter Element Valve Assembly for Tool-Free Sealed Replacement
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Solution Overview
Problem
Existing filter elements for hydraulic fluids and engine oils are costly and inefficient, with complex manufacturing processes and limited component reusability.
Innovation Solution
A filter element design featuring a hollow cylindrical filter bellows with a valve assembly comprising a valve body, valve cage, and sieve, allowing radial fluid flow and a bypass valve mechanism that opens under hydraulic pressure, integrated with a snap-fit or plug-in connection for cost-effective production and component reusability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a filter element is designed to be replaceable without tools, then ease of operation is improved, but device complexity increases due to the need for integrated valve devices and sealing mechanisms
Solution Approach 1:
The valve device is integrated directly into the filter element structure, combining the filtering function with the valve function in a single component. This allows the filter element to be replaced without tools while the valve remains functional, resolving the contradiction between ease of operation and device complexity.
Solution Approach 2:
The filter element serves multiple functions: filtration, sealing (via integrated sealing elements), and valve operation. This multi-functionality allows a single component to replace what would traditionally require multiple separate parts, reducing operational complexity while maintaining tool-free replacement capability.
2Reliability
If sealing elements are integrated into the filter element, then reliability is improved by preventing contamination, but manufacturing precision requirements increase
Solution Approach 1:
The sealing elements are nested within grooves in the filter element body, with the sealing elements fitting into precisely formed channels. This nesting arrangement ensures proper positioning and sealing contact while allowing for standardized manufacturing processes that balance precision requirements with production feasibility.
3Ease of operation
If the filter element includes integrated valve and sealing mechanisms, then ease of operation is improved, but loss of substance increases due to potential sealing issues
Solution Approach 1:
The sealing elements are pre-installed and pre-positioned in grooves during filter element manufacturing, ensuring proper sealing contact is established before the filter element is installed in the housing. This prior positioning prevents leakage issues that would require complex adjustment mechanisms, maintaining both ease of operation and prevention of substance loss.
Data Source
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AI summary
The invention relates to a filter element (10) for filtering a fluid, in particular a liquid. A filter bellows (12) is terminated by a first end disc (14), said first end disc (14) having an opening (44) with a valve device (20) which is arranged within a central tube (18) and which can be opened from the raw fluid side (50) by means of hydraulic pressure. The valve device (20) has a valve body (22), a valve cage (26), and a screen (26), wherein the valve body (22) can be moved in the valve cage (26) along the longitudinal axis (L) and is pressed against a valve seat (30) arranged in the valve cage (26) by means of a spring (24) in a pressure-less state. The screen (28) is arranged on the valve cage (26) and separates the interior (38) of the valve device (20) from the clean fluid side (52), and the valve cage (26) is arranged on a support body (32) connected to the central tube (18).