Core Competitive Advantages
Built-in equal clearance balance linkage (Core Highlight)
Self-balance linkage automatically keeps identical gap between two brake shoes and brake drum during long reciprocating operation. No repeated manual gap calibration required. Thoroughly avoid unilateral lining dragging, local overheating and irregular abrasion, greatly extend friction lining service life and cut spare parts cost for heavy industry factories.
Heavy-duty DC design, stable performance under big load
Optimized thick cast frame and high-strength compression springs cover wide torque range from small trolley to heavy steel mill hoist. DC electromagnet outputs steady suction without the vibration and fluctuation of AC electromagnets, suitable for heavy metallurgical, mining and large port equipment with heavy load demand. Dual-current energy-saving coil: strong instant suction for quick release, low holding current to lower power consumption and coil temperature.
Ultra-low noise smooth running
Internal silicone buffer pads eliminate rigid impact when armature pulls in and releases. No harsh clanging sound during frequent start-stop braking, meeting noise control standards of enclosed steel workshops and indoor production lines. Effectively reduce mechanical shock to gearboxes, steel wire ropes and workpieces, avoid cargo swing and equipment collision.
Fail-safe power-off locking for reliable safety
Spring-applied normally closed structure. Once power failure, circuit trip or DC power supply interruption occurs, the brake locks the drum rapidly with powerful static torque. Prevent outdoor port gantry trolley drifting under strong wind, stop heavy mining inclined conveyors material back-sliding and avoid steel mill hoist load falling.
Low-maintenance modular structure
All hinge pivots adopt maintenance-free self-lubricating sleeves, no regular greasing needed;
Snap-in plug-type non-asbestos friction linings, replaceable without disassembling the whole brake frame, save maintenance time;
Quick-detachable rear cover design, convenient for coil inspection and replacement;
Graduated scale on spring tube for intuitive stepless torque adjustment to match various heavy loads.
Diversified customized options
Complete specifications ZWZA and ZWZ3 series to cover all torque demands. Explosion-proof versions available for underground coal mine DC hoisting equipment and chemical hazardous workshops. Dustproof, rainproof housing and anti-corrosion coating can be customized for coastal high-wind port environments. Vertical mounting as standard, custom horizontal brackets for compact equipment layout.
Main Application Scenarios
DC-driven overhead & rail-mounted gantry cranes, steel metallurgical rolling mill transfer carts, large outdoor port yard trolleys, heavy mining inclined belt conveyors, industrial DC winches and all heavy-duty DC lifting & transport machinery.
Working Condition Parameters
Power supply: DC power matched with supporting rectifier cabinet
Ambient temperature: -20℃ ~ +50℃
Conform to JB/ZQ4386 heavy-duty DC electromagnetic brake standard
Adapt to high-duty-cycle S3 frequent start-stop working system
