Anchor Windlass Crane Belt Brake

     The brake system of a ship crane mainly consists of a brake actuator (brake pad/disc, brake wheel/drum, brake arm), a power drive device (electric hydraulic thruster, electromagnet, pneumatic/hydraulic cylinder), and a core component of a normally closed reset spring.
     According to the structure, it can be divided into external block type, disc type, belt type, etc., and the lifting and variable amplitude mechanism must adopt a normally closed design. ‌‌
Core components:
     Brake actuators: including brake pads (or brake pads), brake arms, brake wheels (drums) or brake discs, which generate braking torque through friction pairs.
     Drive and release device: commonly used as electric hydraulic thruster, electromagnet or pneumatic/hydraulic cylinder, responsible for overcoming spring force to open the brake when powered/ventilated.
     Reset and energy storage components: Strong compression springs or heavy hammers ensure automatic brake holding (normally closed characteristic) in case of power failure/loss of pressure, preventing heavy objects from falling.
     Auxiliary adjustment mechanism: including clearance adjustment bolts, wear compensation devices, and brake opening indicator switches, used to maintain stable braking clearance and torque. ‌‌
Main structural types:
     External block brake: the most commonly used type, with double tile blocks symmetrically holding the brake wheel, the shaft is not subjected to bending moment, suitable for lifting and operating mechanisms.
     Disc brake: With good heat dissipation and compact structure, it is commonly used in high-speed shafts or space limited situations, and can be divided into normally closed pneumatic/hydraulic types.
     Belt brake: using brake bands to wrap the brake wheels, with a simple structure but subjected to bending moments on the shaft, it is currently less commonly used.
     Internal expansion shoe type: Metal boots expand outward for braking, commonly seen in specific vehicles or small equipment, and less commonly used in large ship cranes. ‌‌