ZWZB-400/500 Electromagnetic Drum Brakes

ZWZB-400/500 electromagnetic drum brakes

The ZWZB-400/500 is a heavy-duty DC electromagnetic block (drum) brake designed for high-torque industrial applications. It is widely used in metallurgy, mining, and port machinery where reliable, high-power braking is essential.

The model number breakdown is as follows:

ZWZB: The series designation for a heavy-duty DC electromagnetic drum brake.

400: The Brake Wheel Diameter of 400 mm.

500: Indicates it is matched with a DC braking electromagnet providing a nominal thrust force of 5000 N (approx. 500 kgf).

💡 Key Features & Characteristics

Fail-Safe "Normally Closed" Operation:

Power-to-Release, Spring-to-Brake: When the equipment is running, the DC electromagnet is energized, pulling the armature to compress the main spring and release the brake shoes (open the brake). When the power is cut (during a stop or a power outage), the electromagnet de-energizes, and the powerful spring force instantly pushes the brake shoes against the drum to stop and hold the load.

Safety First: This fail-safe design is critical for heavy machinery, as it automatically prevents uncontrolled movement or load drops in the event of an unexpected power failure.

High-Performance Specifications (ZWZB-400/500):

Massive Braking Capacity: With a 400 mm brake wheel and a powerful 5000 N electromagnet, this brake delivers exceptionally high braking torque, suitable for heavy-load, high-inertia applications.

Drive Unit: Powered by a DC Electromagnet (typically DC 220V), offering lower energy consumption, reduced noise, and less heat generation compared to traditional AC electromagnetic brakes.

Robust & Maintenance-Friendly Design:

Equal Clearance Mechanism: Equipped with an automatic compensation device that keeps the clearance between the brake shoes and the wheel perfectly even on both sides. This prevents one-sided dragging or floating, ensuring smooth and balanced braking.

Self-Lubricating Bearings: The main swing hinge points are equipped with self-lubricating bearings, ensuring high transmission efficiency and a long service life without the need for regular greasing.

Easy Maintenance: The brake pads (linings) use a secure, quick-release clip-on structure. They are typically made of eco-friendly, non-asbestos materials, making replacement fast, convenient, and safe.

Intuitive Adjustment: The main brake spring is usually housed inside a spring tube, often with a scale provided for easy reading and precise adjustment of the braking force.

Environmental Adaptability:

Designed to operate reliably in ambient temperatures ranging from -20°C to +40°C and in environments with high relative humidity (up to 90%).

🏭 Typical Applications

The ZWZB-400/500 is a staple in various heavy industrial sectors:

Metallurgy & Steel Mills: Heavy overhead cranes, rolling mills, and other equipment requiring frequent and powerful braking.

Mining: Heavy-duty hoists, winches, and large inclined belt conveyors.

Port & Harbor: Large ship-to-shore cranes, RMGs, and bulk material handling equipment.

General Industry: Large-scale construction machinery and rotating mechanical drives requiring high braking torque.

📋 General Technical Specifications

表格

Note: The ZWZB-400/500 is a critical safety component. Because of its massive size and extreme braking power, regular inspection of the brake pads, mechanical linkages, and the DC electromagnet is essential. Always ensure the matched electromagnet is powered by the correct voltage to guarantee smooth and instant release during operation, and verify that the equipment's foundation can withstand the immense reaction forces generated during emergency braking.

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