限速器是电梯安全保护系统的核心部件，与安全钳共同构成超速保护装置，其功能是通过实时监测和响应电梯速度异常，确保运行安全。

The speed governor, as the core component of the elevator safety protection system, works in conjunction with the safety gear to form the Overspeed Safety System . Its function is to ensure operational safety through real-time monitoring and responsive actions against elevator speed anomalies.