Working Principle of Stacked Labyrinth Seals
The primary principle is based on labyrinth sealing, where multiple annular sealing tooth rings are arranged around the rotating shaft. These rings create a series of throttling gaps and expansion cavities. When the sealed medium passes through the intricate maze-like gaps, the throttling effect reduces leakage by dissipating pressure energy.
Key Mechanisms:
Flow Resistance and Contraction:
Leaking fluid generates friction within the labyrinth, slowing flow velocity and reducing volume.
Longer flow paths and sharper tooth tips enhance sealing efficiency by minimizing flow cross-section.
Inertial Flow Contraction:
At the labyrinth exit, fluid inertia causes flow stream contraction, further restricting leakage.
Installation and Storage Guidelines
1. Avoid Damage to Seals
Sealing performance depends on precise matching with shaft/bore dimensions. Handle with care to prevent stretching or deformation during transport, installation, and storage.
2. Avoid Forced Installation
Seals are designed for tight-fit placement in grooves. Never force installation, as this may damage the structural integrity. Proceed gradually and gently.
3. Installation Steps:
Step 1: Slightly axially stretch the seal ring (≤5% elongation).
Step 2: Align one end of the seal with the shaft/bore groove.
Step 3: Rotate and slide the remaining portion into the groove using fingers or a nylon installation tool (avoid metal tools).
4. Proper Storage:
Anti-Aging: Store in a flat, dry, and cool environment (away from UV light and temperature extremes).
Pressure-Free: Keep seals in their natural relaxed state without external force.
Labeling: Clearly mark material type (e.g., PTFE, SiC), application, standards (e.g., ISO 3601), and date of receipt.
Operational Parameters
Parameter Specification
Compatible Fluids Steam, water, oil, weak acids, gases
Max. Temperature 600°C (shortterm peak tolerance)
Pressure Range Vacuum to 25 MPa (multistage design)
Applications: Turbines, compressors, high-temperature pumps, chemical reactors.
Compliance: ASME B16.34, ISO 15761, API 682.
For aggressive media (e.g., strong acids), inquire about silicon carbide (SiC) or tungsten carbide (WC) tooth ring options.
Product Description
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