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High Speed Floating Displacement Bearing FD

High Speed Floating Displacement Bearing FD is a specialized bearing designed for high-speed, high-precision applications. Its unique floating displacement structure compensates for minor shaft misalignments, thermal expansions, or dynamic deformations, ensuring rotational stability. Core advantages include non-contact displacement compensation and low friction, making it ideal for vibration-sensitive, noise-critical, and long-life equipment.
Structural Features
Floating Displacement Design: Allows axial/radial shaft movement to eliminate stress caused by assembly errors or thermal expansion.
High-Precision Materials: Uses ceramic balls (Si₃N₄) or high-temperature alloys for corrosion resistance and wear durability.
Air/Oil-Air Lubrication: Enables ultra-high speeds (DN value up to 3×10⁶) via external air supply or oil-air mixtures.
Dynamic Balance Optimization: Precision-ground raceways and lightweight cages reduce centrifugal force and suppress vibration.

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Application

The bearings can be used in the following industries

Aerospace
- Aircraft engine turbine shaft supports (compensating thermal expansion)
- Missile seeker high-speed gyro stabilization platforms
Precision Manufacturing
- Semiconductor wafer cutter spindle bearings
- Ultra-precision grinder nanometer-level feed systems
New Energy
- High-speed motors (e.g., flywheel energy storage)
- Hydrogen fuel cell air compressor bearings (corrosion-resistant requirements)
Medical Devices
- MRI gradient coil levitated bearings (non-ferromagnetic interference)
- Surgical robot high-frequency vibrating scalpel heads
Advanced Research
- Synchrotron radiation light source vacuum chamber rotary seals
- Particle accelerator beam pipe supports

Selection Criteria

Displacement Compensation Range: Choose axial/radial/combined floating designs based on thermal expansion or vibration amplitude.
Speed Compatibility: High-speed models require ceramic balls + oil-air lubrication (DN ≤ 3×10⁶).
Environmental Adaptability: Low-outgassing materials for vacuum; full-ceramic structures for corrosive media.
Stiffness Control: Adjust preload to balance displacement compensation and support stability.

Notes

Installation Precision: Ensure base rigidity to prevent floating failure from excessive initial misalignment.
Lubrication System: Air supply must be filtered ≤0.1μm; mist lubrication requires strict particle control.
Temperature Monitoring: Equip with sensors during high-speed operation to avoid thermal material failure.