Filter Housing Pressure Equalization via Body Sections
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Solution Overview
Problem
Hydraulic system filters face pressure differences that can lead to damage due to the inability to equalize pressure between the inlet and drain spaces, often requiring costly modifications or components like compression springs or additional manufacturing steps for pressure relief.
Innovation Solution
A filter housing design with body sections protruding from the filter bowl base to support the filter element, allowing pressure equalization between the inlet and drain spaces, and incorporating a spring element to secure the filter element and compensate for flow influences, while also facilitating easy assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compression spring is used to support the filter element and enable pressure equalization, then pressure difference damage is prevented, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts the pressure equalization function from the filter element itself and implements it through separate body sections in the filter housing. The body sections create passages that allow pressure equalization between the inlet and drain spaces, eliminating the need for complex modifications to the filter element such as compression springs or pressure relief notches.
Solution Approach 2:
The body sections act as intermediary structures between the inlet space and drain space, providing pressure equalization pathways without requiring direct modification of the filter element. These body sections with integrated passages serve as mediators that resolve the pressure differential issue while maintaining structural simplicity.
2Reliability
If pressure relief notches are made in the end plate, then pressure equalization is achieved, but manufacturing complexity increases due to additional work steps
Solution Approach 1:
The invention removes the pressure relief function from the filter element's end plate and relocates it to the filter housing's body sections. This extraction eliminates the need for additional manufacturing steps in the filter element production process, as the pressure equalization passages are formed as integral parts of the housing structure.
Solution Approach 2:
The body sections combine multiple functions: structural support for the filter element, creation of pressure equalization passages, and fluid distribution. By merging these functions into a single integrated component, the invention eliminates the need for separate pressure relief notches and reduces manufacturing complexity.
3Reliability
If the filter element is shortened to enable pressure equalization, then pressure difference damage is prevented, but filtration effectiveness may be reduced
Solution Approach 1:
The invention segments the pressure equalization function from the filtration function. The body sections handle pressure equalization while the full-length filter element maintains optimal filtration performance. This segmentation allows both functions to be optimized independently without compromise.
Solution Approach 2:
The body sections serve as intermediary structures that enable pressure equalization without requiring shortening of the filter element. The passages in the body sections provide the pressure relief function while the filter element maintains its full length and optimal filtration characteristics.
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
Prevents pressure-induced damage by equalizing pressures, reduces stress on the filter element, and simplifies manufacturing and assembly, ensuring stable and tool-free filter operation with reduced risk of leakage and particle residue.
Implementation Method 1
incorporating a spring element to secure the filter element and compensate for flow influences
Implementation Method 2
forming passages between a radially outer fluid inlet space and a bottom cavity of the filter element, whereby a pressure equalization can take place between these two spaces
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The housing (2) has filter cover (4) whose inner portion (14) is attached to filter element (6) for separating fixed particles from fluid. A filter head (8) is attached to inner portion of filter cover. An inlet terminal (10) is provided to supply filtered fluid into inner portion of filter cover. An expiration terminal (12) is provided for removing filtered fluid from inner portion of filter cover. The lift-up portions (46a,46b) are provided in bottom portion of inner portion of filter cover, and are lifted-up for supporting filter element. An independent claim is included for filter.