Split Polymer Labyrinth Seal Assembly for Easy Shaft Installation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional labyrinth seals are expensive, complex, and require tight tolerances, leading to increased fluid leakage and reduced contaminant prevention when parts move from their default positions, and they typically need disassembly for installation, which complicates maintenance and increases the risk of contamination.
Innovation Solution
A split polymer labyrinth seal assembly with split stationary and rotary sealing elements and a clamping mechanism that secures the rotary element to the shaft, featuring a valve element that moves between contacting and non-contacting positions to prevent contaminants from entering the fluid reservoir, allowing for easy installation without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional labyrinth seals are used, then fluid sealing is provided, but the design is complex and requires tight tolerances
Solution Approach 1:
The labyrinth seal is divided into multiple segments that can be assembled independently around the shaft. Each segment contains sealing elements that work together to provide fluid sealing without requiring the entire seal to be a single complex component, thereby reducing manufacturing complexity and tolerance requirements.
Solution Approach 2:
The seal segments are designed to nest around the shaft in a concentric arrangement, with each segment fitting within the radial space of the housing. This nested configuration allows the seal to provide effective fluid sealing while maintaining a compact design that reduces overall complexity.
2Reliability
If conventional labyrinth seals are used, then fluid sealing is provided, but installation requires disassembly of rotary equipment
Solution Approach 1:
The seal is segmented into multiple sections that can be installed separately around the shaft without requiring complete disassembly of the rotary equipment. The segments can be positioned sequentially and connected, allowing installation while the equipment remains partially assembled and reducing contamination risk.
Solution Approach 2:
The seal segments are pre-assembled with their sealing elements in place before installation onto the shaft. This preliminary assembly ensures proper configuration and alignment, simplifying the installation process and eliminating the need for complex on-site assembly procedures that would require equipment disassembly.
3Object-affected harmful factors
If conventional labyrinth seals are used, then contaminant prevention is provided, but any movement of parts from default positions results in increased fluid leakage
Solution Approach 1:
The seal segments are designed with flexible sealing elements that can dynamically adjust to minor movements and position variations. This dynamic adaptation allows the seal to maintain effective contaminant prevention and fluid sealing even when parts are not in their exact default positions, improving performance stability.
Solution Approach 2:
The sealing geometry incorporates tolerances and adjustable parameters that allow the seal to compensate for position variations. By designing the sealing surfaces and gaps with appropriate parameter ranges, the seal maintains its contaminant blocking capability and fluid sealing effectiveness despite minor movements from ideal positions.
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 split design enhances fluid sealing and debris containment, reduces leakage, and simplifies installation, while the movable valve element ensures effective contaminant prevention even when the shaft is stationary, thereby prolonging equipment life and maintaining fluid integrity.
Implementation Method 1
movement, such as shaft rotation, can often make the labyrinth seal even more effective, depending on the design, by creating a centrifugal force that further serves to trap contaminants and fluids within the seal
Data Source
AI summary
A split labyrinth seal assembly having split stationary and rotary sealing elements, and a split clamping mechanism. The clamping mechanism is configured to secure the rotary element to a rotating shaft. The rotary element can also include an integrally formed valve element that moves between a contacting and a non-contacting position in response to rotation of the shaft. The rotary element and the clamping mechanism can have surface features associated therewith to promote nesting between the components.