Drones (无人机) depend on high-performance bearings (轴承) to translate compact powertrains into stable flight. As multirotor platforms, fixed-wing UAVs, and hybrid VTOLs proliferate across commercial, industrial, and recreational sectors, bearings have evolved from commodity parts into engineered elements that directly affect reliability, payload capability, and sensor accuracy.
Operational Demands and Design Constraints
Modern无人机 present a demanding environment: brushless motors spinning at very high RPMs, rapid directional changes, intermittent axial and radial loads during takeoff and landing, and exposure to dust, moisture, and vibration. A bearing must therefore balance low friction with mechanical robustness — preserving concentricity, damping shock, and maintaining life under cyclic stresses.
Core Functions in Flight Systems
- Smooth Motor Movement: In motors, bearings support rotors and preserve concentric rotation. Reduced friction lowers current draw and heat, improving endurance and thrust efficiency.
- Precision Movement: Bearings in gimbals and actuators directly affect pointing accuracy and stabilization; tight tolerances reduce jitter and maintain reliable control-loop behavior.
- Vibration & Noise Mitigation: Precision bearings suppress micro-vibrations that degrade IMU and camera performance, and lower acoustic signature for noise-sensitive missions.
- Durability: Bearings engineered for fatigue resistance and contamination tolerance extend mean-time-between-failure for fleets operating in harsh or continuous-duty profiles.
System Locations and Integration Notes
Key subsystems that rely on轴承 include: motors (primary load-bearing for propulsion), propeller hubs (runout control), camera gimbals (stabilization), payload mechanisms (release accuracy), and landing gear (impact absorption). Proper shaft/housing fits, bearing preload or clearance, and balance of rotating assemblies are essential to prevent premature wear.
- Type of Bearing:Deep-Groove Ball Bearings ，Angular Contact Bearings，Thrust and Roller Bearings