YW-E250/E50 Two-step Series Electro-hydraulic Drum Brakes

 

 

💡 Key Features & Characteristics

Advanced Two-Step Braking Mechanism:

Step 1 (Deceleration): When activated, the brake first applies a smaller, adjustable braking torque. This allows the machinery to decelerate smoothly and steadily without sudden mechanical shocks.

Step 2 (Holding/Wind-proof): Once the mechanism has come to a complete stop, the second step begins. After an adjustable time delay (typically 1 to 15 seconds, controlled by a one-way speed control valve in the hydraulic circuit), it applies a higher braking torque to securely hold the equipment in place or act as a wind-proof brake.

High-Performance Specifications:

Braking Torque: The YW250-E50 model delivers a nominal braking torque ranging from 300 to 550 N·m.

Drive Unit: Powered by an Ed50/6 electro-hydraulic thruster, which provides a thrust force of 500 N.

Reliable & Maintenance-Friendly Design:

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

Equal Clearance Mechanism: Features an interlocking device that automatically keeps the clearance between the brake shoes and the wheel perfectly even on both sides, preventing one-sided drag or floating.

Easy Maintenance: The brake pads (linings) use a quick-release, clip-on structure. They are available in various materials, including non-asbestos semi-metallic (hard/semi-hard) and soft linings, making replacement fast and convenient.

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

Optional Safety & Control Devices:

Can be equipped with manual release devices, limit switches (for open/closed status), and automatic wear compensation devices (offering up to 5 levels of automatic compensation as the pads wear down).

🏭 Typical Applications

The YW-E250/E50 is specifically designed for applications requiring smooth stopping and reliable holding:

Outdoor Cranes: Widely used for the travel (long travel) mechanisms of large and medium-sized outdoor gantry cranes and bridge cranes, providing excellent deceleration and wind-proof braking.

Specialty Cranes: Suitable for the travel and trolley mechanisms of medium-to-large special cranes, ensuring平稳的减速制动 (smooth deceleration) and reliable holding.

Conveyor Systems: Provides ideal working braking performance for belt conveyor systems.

General Industry: Port machinery, metallurgy, and mining equipment requiring high-frequency, smooth, and safe braking.

📋 General Technical Specifications

表格

Parameter	Description
Type	Two-step Electro-Hydraulic Drum Brake
Model Series	YW-E Series
Model Variant	YW250-E50
Brake Wheel Diameter	250 mm
Braking Torque	300 - 550 N·m
Matched Thruster	Ed50/6 (500 N thrust force)
Delay Adjustment	1 - 15 seconds (adjustable via hydraulic valve)
Ambient Temperature	-20°C to +50°C
Key Features	Two-stage braking, self-lubricating bearings, equal clearance, torque scale

Note: The YW-E250/E50 is a highly specialized safety component. Its unique two-step braking system is critical for preventing load swings and mechanical stress in large outdoor machinery. When installing, ensure the time delay between the first and second braking stages is carefully calibrated to match the specific inertia and operational requirements of your equipment.

 

 

 

 

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