Oil Mist Separator Plate Notch Design for Case Assemblability
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Solution Overview
Problem
Existing oil mist separators face difficulties in smoothly fitting the upper end of the upstream plate into the case inner wall due to its high rigidity, affecting assemblability.
Innovation Solution
The oil mist separator incorporates a notch on the upstream plate that serves as a narrowing portion, reducing the passage area and allowing the plate to be easily fitted into a corresponding slit in the case, combined with a fiber member between the plates for effective oil mist separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the upstream plate is formed in substantially rectangular cross-sectional shape, then the plate structure is simple and rigid, but it is difficult to smoothly fit the upper end of the plate into the slit of the case inner wall
Solution Approach 1:
The upstream plate is divided into a plate body and a fitting portion. The fitting portion is a separate structural element that can be inserted into the slit of the case inner wall, while the plate body maintains its rectangular shape for structural rigidity. This segmentation allows the rigid plate to be assembled into the case without compromising its structural integrity.
Solution Approach 2:
The fitting function is extracted from the main plate body and implemented as a dedicated fitting portion. This fitting portion is specifically designed to engage with the slit in the case inner wall, separating the fitting function from the structural function of the upstream plate.
2Stability of the object's composition
If the upstream plate has high rigidity, then the plate maintains structural stability, but it becomes difficult to fit into the case slit smoothly
Solution Approach 1:
Different parts of the upstream plate have different structural characteristics. The plate body maintains high rigidity and rectangular shape for structural stability, while the fitting portion has a different cross-sectional shape designed specifically for smooth insertion into the case slit. This local differentiation of structural properties resolves the contradiction between stability and ease of fitting.
Solution Approach 2:
The upstream plate is segmented into a stable plate body and a flexible fitting portion. The fitting portion can be inserted into the case slit while the plate body remains stable and maintains its rectangular shape for structural support.
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
This configuration enhances the assemblability and separation efficiency of oil mist from blowby gas, improving the installation strength and separation effectiveness of the oil mist separator.
Implementation Method 1
a fiber material disposed between the pair of plates
Implementation Method 2
the blowby gas that has passed through the through holes, and a fiber material disposed between the pair of plates
Data Source
AI summary
An oil mist separator including a case having an inlet portion and an outlet portion of a blowby gas and forming a passage from the inlet portion to the outlet portion, and an oil separator unit disposed in the passage. The oil separator unit includes a first plate part having a narrowing portion reducing an area of the passage and a second plate part having a hit portion hit by the blowby gas that has passed through the narrowing portion. The narrowing portion is configured by a notch formed from a predetermined end surface of the first plate part, and an inner wall of the case includes a fitting portion in which an end portion having the predetermined end surface of the first plate part is fitted.