Applying multiple brakes in each drive system of the crane hoisting mechanism is one of important means in the improvement of system security, but the design of multi-brake has its constraints. The main content mainly discussed in the paper are the designs of the operation brake and the safety brake.%在起重机起升机构的每套驱动系统中采用多个制动器,是提高系统安全性的重要手段之一,多制动器的设计有其约束条件,本文重点探讨独立作用的双制动和安全制动器的设计.
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