Mechanical Seal Tray Sleeve for External Wear Warning
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Solution Overview
Problem
Existing mechanical seals for liquids lack real-time monitoring and early warning capabilities, making it impossible to detect wear and potential leakage before it occurs, posing safety hazards, especially with dangerous media.
Innovation Solution
A mechanical seal with an axially floating tray sleeve that allows external observation of wear, featuring a static ring, movable ring, locking ring, and a tray sleeve with a warning sign or scale, enabling early warning of seal failure and facilitating safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mechanical seal is designed as a closed contact seal to prevent liquid leakage, then sealing effectiveness is improved, but the ability to monitor wear and detect potential failures in real-time deteriorates
Solution Approach 1:
The patent introduces a tray sleeve as an intermediary component that connects the sealed internal environment to the external observation space. The tray sleeve's side surface acts as a window through which the wear state of the dynamic sealing ring can be observed without compromising the sealing integrity of the closed system
Solution Approach 2:
The patent applies visual indicators (color bands, warning signs, or scales) on the tray sleeve to translate the wear state of the sealing ring into observable color or position changes. This allows operators to detect wear progression through color or position changes on the tray sleeve without opening the sealed system
2Object-affected harmful factors
If the sealing ring is designed to be completely enclosed to prevent liquid splash and leakage, then safety is improved, but the ability to observe and monitor seal operation deteriorates
Solution Approach 1:
The patent segments the mechanical seal system into a sealed internal portion (containing the dynamic and static sealing rings) and an external observation portion (the tray sleeve extending to the outside). This segmentation allows the sealing function to remain enclosed while the monitoring function extends to the external environment
Solution Approach 2:
The patent adds a new dimensional aspect to the seal system by extending the tray sleeve axially from the sealed housing to the external environment. This creates a new observation dimension that allows wear information to be accessed externally without compromising the sealed nature of the internal sealing components
3Reliability
If the mechanical seal operates in a closed system to prevent leakage, then sealing performance is improved, but the ability to perform timely maintenance and replacement deteriorates
Solution Approach 1:
The patent enables preliminary detection of wear through the external observation window on the tray sleeve, allowing operators to identify wear progression before it leads to actual leakage or seal failure. This preliminary detection capability enables planned maintenance scheduling based on actual wear state rather than waiting for failure symptoms
Data Source
AI summary
A mechanical seal for sealing against a rotating shaft includes a static ring positioned about the shaft and a movable ring positioned about the shaft and in sliding contact with the static ring. The movable ring is rotatable with the shaft and a tray sleeve is attached to one of the movable ring and the static ring, with the tray sleeve being selectively movable in an axial direction along the shaft. Wear between the static ring and the movable ring causes the tray sleeve to move in the axial direction. The tray sleeve includes an indicator and relative movement of the indicator along the shaft is in proportion to the wear between the static ring and the movable ring.