A preload spring is a mechanical component used in piezoelectric actuators to apply initial compressive force, ensuring zero-backlash operation and enhancing precision.
A preload spring is a critical component in piezoelectric actuator assemblies designed to apply a constant compressive force to the piezoelectric stack or elements. This initial preload eliminates mechanical backlash, maintains electrical contact stability, prevents tensile stress during operation, and ensures consistent performance by keeping the piezoelectric material under compression even during dynamic cycling. It compensates for thermal expansion differences and mechanical tolerances within the actuator system.
该组件会出现在以下整机或工业产品中。
诱因 → 失效模式 → 工程缓解
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Preload prevents tensile stress on brittle piezoelectric ceramics, eliminates mechanical backlash, maintains electrical contact, and ensures consistent displacement output during dynamic operation.
Insufficient preload causes chatter, reduced precision, and potential piezoelectric element damage. Excessive preload reduces displacement range and may cause premature spring fatigue.
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