In-tank Filter Flow Guide for Uniform Fluid Distribution
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Solution Overview
Problem
Existing filter devices for hydraulic fluids, particularly in-tank return filters, face challenges in achieving efficient contamination removal due to uneven flow distribution and short residence time of fluid within the filter element, leading to incomplete separation of contaminants.
Innovation Solution
Incorporation of a magnetic candle and sensors within the filter element, along with a flow guide device featuring an inflow chamber that calms the flow and generates a swirl flow, ensuring even pressure and flow distribution, and a swirl-generating guide means with spiraling guide surfaces to enhance fluid rotation and residence time, allowing for efficient separation of ferromagnetic particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic candle and sensors are located within the cavity of the filter element, then the separation of ferromagnetic particles is enhanced, but the device complexity increases
Solution Approach 1:
The magnetic candle is integrated directly into the filter element cavity, combining the filtration function with the magnetic particle separation function in a single component. This merging approach enhances separation efficiency while minimizing the increase in device complexity by avoiding separate magnetic separation units.
Solution Approach 2:
The magnetic candle is nested within the filter element cavity, with sensors positioned within the magnetic candle structure. This nested arrangement allows multiple functional elements (filtration, magnetic separation, sensing) to coexist within the same spatial envelope, improving separation efficiency without proportionally increasing overall device complexity.
2Stability of the object's composition
If a flow guide device with inlet chamber is provided to calm the flow, then the flow distribution becomes more uniform, but the device complexity increases
Solution Approach 1:
The inlet chamber is positioned upstream of the filter element cavity, performing the flow calming action before the fluid enters the filtration zone. This preliminary flow conditioning ensures uniform flow distribution across the filter medium from the outset, improving filtration performance without requiring complex flow control mechanisms within the filter element itself.
Solution Approach 2:
The flow guide device acts as an intermediary component between the fluid inlet and the filter element cavity. It mediates the flow transition by providing a calibrated inlet chamber that converts turbulent inlet flow into calm, uniform flow patterns, thereby improving flow distribution uniformity while adding only moderate structural complexity.
3Duration of action of moving object
If swirl-generating guide means with spiraling guide surfaces are used, then the residence time of fluid is extended, but the device complexity increases
Solution Approach 1:
The swirl-generating guide means utilize spiraling guide surfaces with curved geometries that induce rotational flow patterns. This curvature-based approach extends fluid residence time by creating vortex flows that increase contact between fluid and filter medium, improving contamination removal efficiency while adding only moderate structural complexity compared to straight-channel designs.
4Stability of the object's composition
If the flow direction is reversed in the inlet chamber, then the flow is calmed before reaching the filter medium, but the device complexity increases
Solution Approach 1:
The inlet chamber is designed to reverse the flow direction upon entry, creating a U-shaped or recirculating flow pattern that calms the fluid before it reaches the filter medium. This inversion approach stabilizes flow conditions and improves filtration performance while adding only moderate geometric complexity to the inlet chamber structure.
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 solution results in a longer dwell time for fluid within the filter element, enhancing the separation of contaminants and improving the overall performance of the filter device by ensuring a more even distribution of pressure and flow, thereby increasing the filter's efficiency in removing contaminants.
Implementation Method 1
a flow guide device is provided between the fluid inlet and the inner cavity of the respective filter element for directing the flow of the unfiltrate reaching the filter medium, the flow guide device having guide means for generating a swirl flow which rotates in the cavity about the cylinder axis
Implementation Method 2
a magnetic candle or sensors are located within the cavity of the filter element
Data Source
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AI summary
A filter device for fluids, in particular in the form of a tank-installation return filter, includes a filter element (27) accommodated in a housing (3) having a fluid inlet (17) for supplying unfiltered fluid to an inner cavity (31) of the filter element (27). The inner cavity is surrounded by a filter medium (29) through which unfiltered fluid can flow. A flow-conducting apparatus (13, 49, 77) orients the flow of the unfiltered fluid reaching the filter medium (29) and is provided between the fluid inlet (17) and the inner cavity (31) of the filter element (27).