YW-E Two-step Series Electro-hydraulic Drum Brakes

 

 

2. How Two‑Step Braking Works

The core feature is adjustable two‑stage torque output with a time delay between stages:

First‑step braking (smooth deceleration)When power is cut off, the brake applies a smaller, adjustable torque to slow the machinery smoothly, minimizing shock and load sway.

Second‑step braking (holding/parking)After the mechanism stops, the second stage engages after an adjustable delay (1–15 seconds) via a one‑way flow control valve in the damping cylinder. It delivers full torque for secure holding, wind protection, or emergency parking.

3. Key Technical Parameters

Brake drum diameter: 200–400 mm

Total braking torque: 230–2500 Nm

Thruster: ED‑series (IP65, 380V/400V, 50/60Hz)

Delay time adjustment: 1–15 seconds (via damping valve)

Protection grade: IP54 (IP65 optional)

Ambient temperature: -20°C ~ +60°C

Friction lining: Asbestos‑free, snap‑in type (easy replacement)

Compliance: JB/T 6406‑2006, DIN 15435, ISO 9001

4. Main Structure

ED‑series electro‑hydraulic thruster: Provides power to release the brake; internal spring ensures fail‑safe braking on power loss.

Rigid cast‑steel frame: High rigidity, anti‑vibration, and deformation‑resistant for heavy loads.

Dual brake shoes with snap‑in linings: Fast replacement without disassembly; linked equal‑gap mechanism ensures uniform shoe clearance.

Two‑stage spring assembly: Separate springs for first‑step (light torque) and second‑step (full torque) braking.

Damping cylinder with flow control valve: Adjusts second‑step delay (1–15 s).

Self‑lubricating bearings: At all pivot points, reducing maintenance.

5. Core Advantages

Smooth, shock‑free stopping: First‑step low torque avoids load swing; ideal for cranes and conveyors.

Adjustable delay: Second‑step timing tunable for precise holding control.

Fail‑safe design: Spring‑powered braking on power loss, meeting safety standards.

Easy maintenance: Snap‑in linings, external gap adjustment, self‑lubricating pivots.

Harsh environment resistant: IP65 option, corrosion‑resistant paint, suitable for outdoor and dusty sites.

6. Typical Applications

Outdoor overhead/gantry crane travel mechanisms (wind‑resistant parking).

Belt conveyors service braking (controlled stopping).

Large special cranes slewing/travel (smooth deceleration + holding).

Port/yard hoisting equipment and heavy machinery requiring dual‑stage braking.

7. Short Catalogue Version

YW‑E series is a two‑step electro‑hydraulic drum brake with ED‑thruster, offering adjustable 1–15 s delay between smooth first‑step deceleration and full‑torque second‑step holding. Featuring snap‑in linings, equal‑gap mechanism, and fail‑safe springs, it is ideal for outdoor cranes, conveyors, and heavy machinery needing precise, shock‑free braking and secure parking.

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