Impeller Contamination Guard for Clean Shaft Seal Airflow
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Solution Overview
Problem
Existing contamination guards and seals for rotating shafts in machinery fail to adequately prevent debris and contaminants from entering the lubrication section, leading to increased wear and premature system failure.
Innovation Solution
A contamination guard comprising an inner ring, first and second annuli, and a plurality of impellers that form a passage to direct contaminated air away from the oil sealing assembly, ensuring clean air reaches the lubrication section and preventing debris entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional seals and guards are used on rotating shafts, then the structure is simple, but debris and contaminants can still intrude into the lubrication section causing wear and premature failure
Solution Approach 1:
The contamination guard is divided into multiple segments including a first annulus, second annulus, and plurality of impellers spaced apart from each other. This segmentation allows each component to perform specific functions (airflow direction, contamination separation) while maintaining overall system effectiveness without excessive complexity
Solution Approach 2:
The contamination guard acts as an intermediary device between the external environment and the lubrication section. It introduces a protective airflow field that mediates the interaction between contaminants and the seal, preventing direct contact without requiring the seal itself to be overly complex
2Reliability
If a contamination guard with multiple annuli and impellers is implemented, then contaminant protection is improved, but the device complexity increases
Solution Approach 1:
The contamination guard structure performs multiple functions simultaneously: the first and second annuli create protective airflow patterns, the impellers generate rotational flow to separate contaminants, and the entire assembly acts as a barrier to contaminant intrusion. This multi-functionality reduces the need for additional separate components
Solution Approach 2:
The device utilizes pneumatic principles by employing airflow generated through the annuli and impellers to create a protective air barrier. The rotating impellers generate centrifugal force and airflow patterns that naturally separate contaminants from the air stream, using fluid dynamics rather than mechanical filtration components
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 contamination guard effectively prevents contaminants from entering the lubrication section, enhancing the performance and longevity of machinery by maintaining clean air flow and reducing wear on internal components.
Implementation Method 1
The plurality of impellers are spaced apart from each other and each has a body extending outward from adjacent the inner ring to the second annulus and beyond the second annulus forward face, and an impeller rib extending from adjacent the inner ring to between the second annulus aft face and the first annulus forward face away from the inner ring
Data Source
AI summary
A contamination guard for a machine is disclosed herein. The contamination guard includes an inner ring, a first annulus, a second annulus, and an impeller. The impeller is configured to promote intake of nearby air with contamination. The first annulus and second annulus form a passage that is configured to sling away air with contamination during operation of the machine.