YWZ4-800/320A Series Electro-hydraulic Drum Brakes

The YWZ4-800/320A Series Electro-hydraulic drum brakes are heavy-duty, spring-applied industrial brakes. Here is a description of their key features and function:

Operating Principle:

This series is a fail-safe, drum-type brake. It uses an electro-hydraulic thruster (likely the 320A model)​ as the actuator. The system operates as follows:

Release:​ When the thruster's electric motor is energized, it drives a hydraulic pump. The generated hydraulic pressure pushes a piston, which compresses the internal brake springs and retracts the brake shoes, releasing the brake.

Apply (Fail-Safe):​ When electrical power is cut off, the hydraulic pressure drops. The stored energy in the compressed brake springs instantly forces the brake shoes outward against the inner surface of the brake drum, applying the braking force automatically. This ensures safety during power loss.

Key Features:

Model Designation:​ "YWZ4" indicates the brake series, "800" typically denotes the rated braking torque (e.g., 800 Nm), and "320A" specifies the model and size of the integrated electro-hydraulic thruster.

High Torque:​ The 800 Nm rating makes it suitable for stopping and holding high-inertia loads.

Electro-hydraulic Thruster (320A):​ Provides a smooth, cushioned, and quiet actuation compared to purely electromagnetic brakes. The hydraulic action dampens engagement shocks.

Automatic Wear Compensation:​ Most models feature an automatic adjustment mechanism that maintains the correct brake shoe-to-drum clearance as the friction linings wear, ensuring consistent brake performance and reducing maintenance.

Drum Brake Design:​ Utilizes internal brake shoes, offering effective braking force and good heat dissipation from the drum.

Robust Construction:​ Built with heavy-duty components (cast iron or steel shoes, levers, and base frame) for durability in harsh industrial environments like mills, foundries, and ports.

Typical Applications:

These brakes are primarily used for the travel or slewing motions of heavy industrial machinery, such as:

Overhead cranes and gantry cranes.

Portal cranes and shipyard cranes.

Conveyor drives and other material handling equipment requiring reliable, fail-safe braking.

Summary:

The YWZ4-800/320A is a robust, fail-safe braking system designed for heavy-duty industrial service. It combines the reliable holding force of a spring-applied drum brake with the smooth, controllable actuation of an electro-hydraulic thruster, making it a common choice for safety-critical crane and machinery applications.

Hot Tags: ywz4-800/320a series electro-hydraulic drum brakes, China, manufacturers, supplier, factory, customized, Electric Hydraulic Drum Brakes, Plug in crane drum brake, Port machinery Disc brake, Transport machinery drum brake, Windproof drum brake, YW K series electro hydraulic drum brakes