Modular Shaft Seal Assembly for Contaminant Blocking and Fast Service
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Solution Overview
Problem
Existing seal assemblies mounted on shafts do not provide sufficient sealing against contaminants and are often difficult to remove, inspect, and replace, leading to increased contamination and longer repair times.
Innovation Solution
A modular seal assembly with a casing defining a cavity and a pair of radial shaft seals positioned within the cavity, allowing for easy removal, inspection, and replacement, and providing improved sealing against contaminants through multiple barriers in series.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing seal assemblies are mounted on shafts, then sealing function is provided, but sealing effectiveness is insufficient and maintenance difficulty increases
Solution Approach 1:
The seal assembly is divided into modular components including a seal carrier, radial shaft seals, and other sealing elements that can be independently accessed and replaced. The seal carrier can be removed from the shaft to provide access to the seals without requiring complete disassembly of the entire sealing system.
Solution Approach 2:
The radial shaft seals are positioned within a cavity in the seal carrier, creating a nested structure where the seals are housed within the carrier assembly. This nested arrangement protects the seals while allowing the entire carrier to be mounted on and removed from the shaft as a unit.
2Ease of repair
If existing seal assemblies are used, then sealing is provided, but removal and replacement difficulty increases repair time
Solution Approach 1:
The seal assembly is segmented into a seal carrier and individual sealing elements. The seal carrier can be removed from the shaft to provide access to the seals, allowing technicians to inspect and replace only the sealing elements without removing the entire carrier assembly from the shaft.
Solution Approach 2:
The seal carrier is pre-configured with the radial shaft seals and other sealing elements in a modular assembly. This preliminary configuration allows the seals to be replaced by simply removing and replacing the seal carrier unit, eliminating the need for complex disassembly procedures during maintenance.
3Object-affected harmful factors
If existing seal assemblies are mounted, then sealing function is achieved, but contamination risk increases due to insufficient sealing
Solution Approach 1:
Multiple sealing elements including radial shaft seals and other sealing components are combined within a single seal carrier assembly. This merging of multiple sealing functions into one integrated unit provides enhanced contaminant blockage capability while presenting a simple modular structure for installation and maintenance.
Data Source
AI summary
A system including a seal assembly having a casing defining a cavity therein, and a pair of radial shaft seals positioned in the cavity. The casing is configured to be removably mounted on a shaft such that each radial shaft seal sealingly engages the shaft.