Filter Head Valve Unit Structure for Seal-Tight Pressure Stability
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Solution Overview
Problem
Existing valve units in fluid systems, such as those used in fuel supply systems for internal combustion engines, face challenges with seal-tightness and pressure stability, particularly in blocking directions, leading to potential leaks and increased pressure loss.
Innovation Solution
A valve unit design featuring a plate-shaped valve body with a closure section and a connection section, where the closure section has a closure tab and the connection section has a contact tab, both projecting into a cutout, with fastening points arranged along the longitudinal axis, allowing for pretension and secure fastening to a filter head, which includes a valve seat and fastening pin, to enhance seal-tightness and pressure stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional valve design is used, then the structure is simple, but the seal-tightness is insufficient and pressure stability deteriorates
Solution Approach 1:
The valve body is segmented into distinct functional sections: a closure section with a closure tab for sealing, and a connection section with a contact tab for mounting. This segmentation allows each section to be optimized independently - the closure section for seal-tightness and the connection section for structural stability, thereby improving reliability without excessive complexity.
Solution Approach 2:
The patent introduces a longitudinal axis dimension along which the first and second fastening sections are arranged. This dimensional arrangement allows the closure tab and contact tab to be positioned at different locations along the axis, enabling independent optimization of sealing and connection functions while maintaining overall structural coherence.
2Reliability
If the closure tab is made flexible to improve sealing, then seal-tightness improves, but pressure stability in blocking direction deteriorates
Solution Approach 1:
By separating the closure function (closure tab) from the connection function (contact tab), the patent allows the closure tab to be flexible for sealing while the connection section with its fastening points provides rigid structural support. This segmentation prevents the flexibility needed for sealing from compromising pressure stability.
Solution Approach 2:
The closure tab is designed with local flexibility at the closure section to ensure seal-tightness, while the connection section maintains local rigidity through fastening points to ensure pressure stability. Each section has differentiated properties optimized for its specific function.
3Ease of manufacture
If fastening points are arranged asymmetrically, then manufacturing is easier, but pressure distribution and seal-tightness deteriorate
Solution Approach 1:
While maintaining functional asymmetry for manufacturing ease, the patent positions the first and second fastening sections along the longitudinal axis in a controlled asymmetric arrangement. This allows the closure tab to be properly tensioned for sealing while keeping the connection section manufacturable, balancing both requirements through strategic positioning rather than complete symmetry.
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 design ensures improved seal-tightness and minimal pressure loss by maintaining the closure tab in contact with the valve seat, preventing accidental release due to gravity and providing stable pretension, even under counter pressures, thus optimizing performance in fuel system applications.
Implementation Method 1
the contact tab permits a beneficial deformation that generates a pretension for the closure tab
Implementation Method 2
a fastening pin for fastening a connection section of the valve unit
Implementation Method 3
a seal means is arranged at the closure tab that is provided for contact at the valve seat
Data Source
AI summary
A valve unit has a plate-shaped valve body with a closure section and a connection section. The valve body has a cutout surrounded by a frame. The closure section has a closure tab that, beginning at a first fastening section at the frame, projects into the cutout. The connection section, beginning at a second fastening section at the frame, projects into the cutout and has a contact tab and a fastening point. The first and second fastening sections are arranged opposite each other at the frame along a longitudinal axis of the valve body. A filter head for the valve unit has a valve seat for a seal body of the closure section of the valve body. A fastening pin of the filter head fastens the connection section of the valve unit. A contact region of the filter head contacts a positioning region of the valve unit.