Oil Separator Simplified Seal Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing oil separators face challenges in manufacturing and installation complexity due to complicated labyrinth seals, which are costly and require many operating steps, and suffer from oil entrainment issues due to unfavorable pressure conditions between the drive and separation chambers.
Innovation Solution
The oil separator features a simplified seal design where the shaft has a plastic casing that forms part of the disc separator, with sealing elements integrated into the partition wall and shaft, allowing for a one-piece manufacturing process and improved sealing efficacy, including a labyrinth seal configuration with adjustable sealing lips and materials for enhanced rigidity and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complicated labyrinth seals with multiple sealing elements are used, then sealing effectiveness is improved, but manufacturing cost and installation complexity increase
Solution Approach 1:
The patent combines the first and second sealing elements into a single integrated sealing structure that is formed as one piece with the shaft casing. This merging eliminates the need for separate sealing components and their associated manufacturing and installation complexity, while maintaining the labyrinth seal's effectiveness through the integrated design that creates the necessary sealing path.
Solution Approach 2:
The shaft casing is designed to perform multiple functions: it provides structural support for the shaft, forms the sealing surface for the labyrinth seal, and integrates the sealing geometry directly into the component. This multi-functionality eliminates the need for separate sealing elements and reduces overall device complexity.
2Reliability
If complicated labyrinth seals with undercuts are used, then sealing effectiveness is improved, but manufacturing tooling cost and installation difficulty increase
Solution Approach 1:
By integrating the sealing elements directly into the shaft casing as a one-piece structure, the patent eliminates the need for separate components with undercuts that require specialized manufacturing tools. The sealing geometry is formed directly during the shaft casing manufacturing process, simplifying tooling requirements.
Solution Approach 2:
The patent employs a simpler, more economical sealing structure that can be manufactured using standard tools rather than requiring expensive specialized tooling for undercuts. The sealing effectiveness is maintained through the integrated design rather than through complex geometric features that demand expensive manufacturing capabilities.
3Productivity
If high volume flow of blow-by gas is present, then cleaning capacity is improved, but pressure conditions cause oil entrainment from drive chamber to separation chamber
Solution Approach 1:
The patent extracts the sealing function from the shaft casing integration, creating a dedicated sealing structure that is specifically designed to prevent oil entrainment. The labyrinth seal geometry is optimized to create a effective barrier that maintains its sealing capability regardless of the volume flow conditions or pressure differentials present during operation.
Solution Approach 2:
The labyrinth seal structure is designed in advance to counteract the harmful effect of oil entrainment before it can occur. The sealing geometry creates a preliminary barrier that prevents oil from moving from the drive chamber to the separation chamber, even when high volume flows create unfavorable pressure conditions.
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 design reduces manufacturing costs and time, enhances sealing effectiveness, and prevents oil entrainment by creating a robust barrier between the drive and separation chambers, improving the overall efficiency of oil mist and droplet separation.
Implementation Method 1
a disc separator for separating oil mist and/or oil droplets out of the gases is rotatably arranged in the separation chamber
Implementation Method 2
The labyrinth seal usually has two sealing elements, wherein an outer rotationally symmetrical sealing element is fixedly connected to the housing, for example via the partition wall, and an inner rotationally symmetrical sealing element is fixedly connected to the shaft. On the mutually facing abutting edges, the two sealing elements usually have complicated structures which engage in one another in an alternating fashion, so that a route involving multiple changes in direction is created between the sealing elements.
Data Source
AI summary
An oil separator for separating oil mist and/or oil droplets out of gases to be cleaned is described. A ventilation system that has the oil separator that may be used with an internal combustion engine is also described.