Annular Filter Element With Guide Vanes For Particle Separation
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Solution Overview
Problem
Existing filter devices for internal combustion engines do not effectively separate dirt particles from combustion air before it flows through the filter medium, leading to inefficiencies in air filtration.
Innovation Solution
A filter device with an annular filter medium body and guide vanes that impart a twist to the fluid flow, causing dirt particles to separate on the inner surface of the housing wall, combined with a filter housing design that includes an inlet channel with varying cross-sectional areas to enhance flow deflection and separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide vanes are added to the filter element to separate dirt particles, then filtration efficiency is improved, but device complexity increases
Solution Approach 1:
The guide vanes are integrated directly into the end plate structure of the filter element, merging the flow guidance function with the structural support function. This eliminates the need for separate guide vane components and reduces assembly complexity while maintaining the particle separation capability.
Solution Approach 2:
The guide vanes are positioned to deflect and accelerate the gas stream before it reaches the filter medium body, performing preliminary separation of coarse contaminants. This pre-separation reduces the loading on the main filter medium, improving overall filtration efficiency without requiring additional filtration stages.
2Loss of energy
If the filter element is designed with an annular closed structure, then flow resistance is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The annular filter medium body is segmented into a modular structure with distinct end plates and a central filtering section. This segmentation allows for independent manufacturing and assembly of components, reducing the overall manufacturing precision requirements while maintaining the low flow resistance characteristics of the closed annular design.
Solution Approach 2:
The end plates are designed with varying thickness and structural properties at different locations - thicker at mounting points for structural integrity and thinner at flow areas to minimize resistance. This local variation in quality optimizes both flow characteristics and manufacturing feasibility.
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 effectively separates dirt particles from the combustion air, improving the filtration efficiency and allowing for a more compact installation design while maintaining low resistance to airflow.
Implementation Method 1
Adjacent to an end plate on one end face of the filter medium body, a plurality of guide vanes are arranged, which extend radially beyond the outer contour of the end plate in the direction of the longitudinal axis and protrude into a flow path that is arranged upstream of the inflow side of the filter medium body. The fluid flows against the guide vanes and influences the fluid flow. This flow is imparted, in particular, with a swirl, which promotes the separation of dirt particles entrained in the fluid.
Implementation Method 2
The fluid to be cleaned flows through the annular filter medium body of the filter element in a radial direction, particularly radially from the outside to the inside, so that the outside of the filter medium body forms the inflow or dirty side, and the inside forms the clean side.
Data Source
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AI summary
The invention relates to a filter element having an annular filter medium body, wherein a plurality of guide vanes, which extend radially beyond the outer contour of the end disk, are arranged on the filter element adjacent to an end disk on the filter medium body.