The invention discloses a tower crane brake failure detection and protection method, which belongs to the technical field of tower crane brakes, and comprises the following steps of: self-detecting a tower crane frequency converter, detecting motor data by a speed encoder, feeding back the motor data to the frequency converter, and transmitting the motor data to a PLC (Programmable Logic Controller) by the frequency converter through a bus; when the PLC detects a hook slipping alarm position signal fed back by the frequency converter or detects that the feedback of the speed encoder is greater than a speed threshold value in a stop state of the frequency converter and lasts for a detection time, the brake is judged to be invalid, and after the brake is confirmed to be invalid, the PLC starts the frequency converter and the hydraulic clamp to perform protection action and give an alarm to a cab. The method has the advantages that a detection means and a protection means are added, so that the tower crane brake is safer and more reliable.
本发明公开了一种塔机制动器失效检测及保护方法,属于塔机制动器技术领域,其包括塔机变频器自检测,速度编码器检测电机数据反馈至变频器,并由变频器通过总线传输给PLC控制器,PLC控制器检测到变频器反馈的溜钩报警位信号或在变频器停止状态下,检测速度编码器反馈大于速度阈值,并持续一个检测时间时判定为制动器失效,确认制动器失效后,PLC控制器启动变频器和液压钳进行保护动作,对司机室发出警报。本发明的优点在于:增加检测手段及保护手段,使塔机制动器更安全、可靠。
Tower crane brake failure detection and protection method
一种塔机制动器失效检测及保护方法
2023-07-14
Patent
Electronic Resource
Chinese
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