Filter Assembly with Tangential Inflow for Cyclone Pre-Separation
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Solution Overview
Problem
Existing filter arrangements for motor vehicles face challenges in maintaining low flow resistance while minimizing installation space and accommodating cyclone pre-separation, which restricts geometry and orientation.
Innovation Solution
A filter arrangement with a tangentially arranged inflow connection piece that widens in the direction of flow, allowing for cyclone pre-filtering and reducing flow resistance, featuring a cylindrical housing with a lateral inflow opening and an inflow nozzle that transitions smoothly into a rotating flow, facilitating centrifugal separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyclone pre-separation is integrated into the housing, then pre-separation effectiveness is improved, but geometry and installation orientation are restricted
Solution Approach 1:
The filter system is divided into separate functional modules: the housing with filter element and the separate cyclone pre-separation device. This segmentation allows the pre-separation device to be independently positioned and oriented without constraining the overall housing geometry, resolving the contradiction between pre-separation effectiveness and geometric flexibility.
Solution Approach 2:
The inflow connection piece extends in a direction that is not radial to the cylindrical housing, creating a three-dimensional arrangement that accommodates cyclone pre-separation without restricting the housing's cylindrical geometry or installation orientation. This dimensional adjustment enables both effective pre-separation and geometric adaptability.
2Loss of energy
If the inflow connection piece has a flow cross section that widens in the direction of flow, then flow resistance is reduced, but manufacturing complexity increases
Solution Approach 1:
The flow cross-section of the inflow connection piece is designed to change along the flow direction, with a larger cross-section at the housing connection and a smaller cross-section at the distal coupling area. This parameter variation reduces flow resistance while the gradual transition is designed to be manufacturable using standard forming processes.
Solution Approach 2:
The inflow connection piece features a smoothly curved, tapering geometry that transitions from a larger circular cross-section to a smaller one. This curved design reduces flow resistance by eliminating sharp edges and promoting laminar flow, while the simple rotational symmetry makes it manufacturable as a single piece.
3Ease of manufacture
If the inflow opening is covered by an attachment surface, then manufacturing flexibility is improved, but the number of components increases
Solution Approach 1:
The inflow connection piece is designed as a separate component with an attachment surface that covers the inflow opening. This segmentation allows the housing to be manufactured with a simple opening without requiring complex integrated features, while the separate connection piece can be optimized independently for flow characteristics and attachment methods.
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 achieves effective pre-separation and reduces flow resistance, enabling efficient filtration with flexible manufacturing and installation options, including adaptable geometries and simplified production.
Implementation Method 1
raw fluid flows tangentially, ie at an angle of approximately 90° to the radial direction, into the filter receptacle and flows in a circular or turbulent manner between the inside of the lateral surface and a filter element. This allows centrifugal separation to be achieved.
Implementation Method 2
raw fluid flows tangentially, ie at an angle of approximately 90° to the radial direction, into the filter receptacle and flows in a circular or turbulent manner
Data Source
Figure 1~3
Figure 4~6
Figure 7~8
AI summary
The filter arrangement comprises a filter receptacle (10) and a round filter element arranged in the filter receptacle. The filter receptacle comprises a housing (1) with a cylindrical housing portion, an inflow opening is arranged in the outer surface of the housing portion, an inflow socket (2) fixed to the inflow opening for coupling a fluid supply line, and an axial outflow opening (9). The inflow socket has a flow cross-section that widens in a flow direction. The filter receptacle is formed as a multi-part housing for receiving the rotationally symmetrical filter element. An independent claim is included for a method for manufacturing a filter receptacle for a filter arrangement.