Labyrinth Seal Bearing Housing for Mixing Vessel Contamination Control
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Solution Overview
Problem
Existing seals for bearing housings in mixing vessels degrade over time, allowing contaminants like oil and grease to enter the vessel and contaminate the contents, as they do not effectively prevent leakage and wear.
Innovation Solution
A labyrinth seal bearing housing system is introduced, comprising a first seal element connected to the vessel wall and a second seal element connected to the rotating shaft, creating a tortuous flow path between the exterior and interior of the vessel to prevent contamination, with the second seal element rotating relative to the first seal element and the bearing support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bushing or packing gland seal is used, then the seal provides initial protection against contaminants, but it degrades and disintegrates over time allowing contamination
Solution Approach 1:
The seal is divided into multiple labyrinth segments (first seal element, second seal element, bearing support) that create a tortuous path. Each segment acts as an independent barrier, so if one degrades, the others continue to provide protection. This segmentation eliminates the single-point-failure issue of traditional bushing seals.
Solution Approach 2:
The tortuous flow path acts as an intermediary mechanism between the exterior and interior of the mixing vessel. Instead of relying on a single contact seal that wears, the contaminated fluid must navigate through multiple directional changes and narrow passages, significantly reducing contamination risk even if individual segments degrade.
2Reliability
If a contact seal like bushing or packing gland is used, then sealing is achieved through direct contact, but wear and degradation occur over time
Solution Approach 1:
The second seal element is designed to rotate with the shaft, creating a dynamic seal that maintains sealing effectiveness through relative motion. This rotational movement prevents the stagnation and degradation issues associated with static contact seals, extending service life while maintaining reliability.
Solution Approach 2:
The labyrinth seal utilizes curved and tortuous flow paths instead of straight linear contact. The curved geometry of the seal elements creates a more durable sealing mechanism that distributes wear and prevents the concentrated stress points that lead to degradation in traditional contact seals.
3Object-affected harmful factors
If a simple seal structure is used, then installation and operation are straightforward, but contamination prevention is insufficient
Solution Approach 1:
The seal structure is segmented into distinct elements (first seal element connected to vessel wall, second seal element connected to shaft, bearing support) that can be independently manufactured and assembled. This modular segmentation makes the complex tortuous path structure manageable in terms of installation and maintenance while achieving superior contamination prevention.
Solution Approach 2:
Instead of using a simple linear seal, the invention creates a three-dimensional tortuous flow path that forces contaminated fluid to navigate multiple directional changes. This dimensional complexity significantly enhances contamination prevention while the modular segmented structure keeps installation and operation relatively straightforward.
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 labyrinth seal bearing housing effectively inhibits the entry of contaminants by creating a tortuous path, preventing solid and liquid contaminants from entering the mixing vessel and ensuring the integrity of the contents, thus reducing contamination and wear-related issues.
Implementation Method 1
The first seal element and the second seal element are structured and arranged to create a tortuous flow path between an exterior and an interior of the mixing vessel
Data Source
AI summary
Systems and methods for bearing housings are disclosed. A labyrinth seal bearing housing includes: a first seal element that is structured and arranged to be connected to a wall of a mixing vessel; a second seal element that is structured and arranged to be connected to a rotatable shaft; and a bearing support that is structured and arranged to be connected to the first seal element. The second seal element is configured to rotate relative to the first seal element and the bearing support. The first seal element and the second seal element are structured and arranged to create a tortuous flow path between an exterior and an interior of the mixing vessel.