The invention discloses a method for controlling a brake of a hoisting mechanism of a large-tonnage tower crane, and relates to the technical field of tower cranes. During braking, the brake is closed after a motor is hovered by using a frequency converter, and a hydraulic clamp is closed after the frequency converter keeps running and hovers; when the brake is released, the drum side hydraulic clamp is started, the frequency converter is started, and the motor high-speed end brake releases the brake after the frequency converter is started; comprising the steps of S1, hoisting mechanism brake control and S2, hoisting mechanism brake release control. After the rotating speed of the motor is zero, the motor high-speed end brake is closed, so that a brake shoe is statically locked when the motor high-speed end brake performs braking, the abrasion of the motor high-speed end brake can be reduced, the frequency converter is kept in a running state in the braking process, and the situation that in an existing control method, when the gear returns to zero, only the high-speed end brake is braked, and the braking efficiency is high is prevented. The hydraulic clamp can be opened for a period of time, and the problem of hook slipping caused by insufficient braking force due to abrasion of a brake at the high-speed end of the motor occurs during the period.
本发明公开了一种大吨位塔机起升机构制动器控制方法,涉及塔吊技术领域,在进行制动时利用变频器对电机悬停后关闭制动器,变频器保持运行悬停结束关闭液压钳;在进行解除制动时开启卷筒侧液压钳同时启动变频器,变频器启动后电机高速端制动器解除制动;包括:S1起升机构制动控制步骤和S2起升机构制动解除控制步骤。在电机转速为0后对电机高速端制动器进行关闭,使得电机高速端制动器在进行制动时闸瓦为静止锁止,能够降低电机高速端制动器的磨损,并且在制动过程中变频器保持运行状态,防止了现有控制方法中档位回零时,只抱闸高速端制动器,液压钳会保持打开一段时间,期间如出现电机高速端制动器因磨损导致制动力不足发生溜钩的问题。
Large-tonnage tower crane hoisting mechanism brake control method
一种大吨位塔机起升机构制动器控制方法
2023-07-25
Patent
Electronic Resource
Chinese
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