YWZ8-710/E201A Electro-hydraulic Drum Brakes

YWZ8-710/E201A Electro-hydraulic drum brakes

The YWZ8-710/E201A is a large-scale, heavy-duty Electro-Hydraulic Drum Brake. It is designed for high-torque applications requiring robust braking performance on large machinery. The "E201A" designation indicates it is paired with a large Ed-series (or equivalent) electro-hydraulic thruster capable of generating significant force to release the brake.

The model number breakdown is as follows:

YWZ8: The series designation for heavy-duty electro-hydraulic drum brakes.

710: The Brake Wheel Diameter of 710 mm.

E201A: The specific Thruster Model (equivalent to Ed201/6 or similar large thrust units). The "201" indicates a high-thrust frame size (approx. 2000N), and "A" typically denotes a specific modification or mounting variant.

💡 Key Features & Characteristics

High-Capacity Thruster (E201A / Ed201):

Thrust: The E201A thruster generates a rated thrust of approximately 2000 N (200 kgf).

Function: It acts as the "muscle" of the brake, overcoming the strong spring force to release the brake shoes from the 710mm drum.

Design: It is an integrated electro-hydraulic unit (motor + pump + cylinder) designed for continuous duty and high-frequency operation.

Interlocking Equalizing Mechanism:
The YWZ8 series features a sophisticated interlocking equalizing device. This ensures that both brake shoes retract and apply equally and simultaneously. This is critical for large brakes to prevent uneven wear, heat buildup, and "dragging" on one side of the large drum.

Visual Torque Adjustment:
The main compression spring is housed in a square tube with a graduated scale. This allows maintenance personnel to easily read and adjust the braking torque (spring force) without needing complex calculations or tools.

Maintenance-Free Linkage:

Self-Lubricating Bearings: The main pivot points are equipped with self-lubricating bearings, eliminating the need for manual greasing and ensuring smooth operation even in dusty environments.

Snap-in Brake Pads: The friction pads use a card-mounted (snap-in) structure, allowing for quick and easy replacement without disassembling the brake arm.

Robust Construction:
Designed for harsh industrial environments, the brake features a heavy-duty cast steel or welded frame capable of withstanding high vibration and shock loads.

🏭 Typical Applications

The YWZ8-710/E201A is used in heavy industry where large rotating masses must be controlled:

Port Machinery: Large ship-to-shore cranes, gantry cranes, and RMGs (Rubber Tyred Gantry cranes).

Mining: Large ball mills, crushers, and heavy-duty conveyors.

Metallurgy: Steel rolling mills and large overhead cranes.

Power Plants: Coal handling systems and large fans.

📋 General Technical Specifications

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Note: The E201A thruster is a large unit. When replacing it, ensure the mounting dimensions (hole spacing) and electrical specs (voltage/frequency) match. The "E" series is often interchangeable with the "Ed" series (e.g., Ed201/6), but you should verify the stroke (60mm) and thrust (2000N) to ensure compatibility with the YWZ8-710 frame.

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