YW-E300/E30A Two-step Series Electro-hydraulic Drum Brakes

️ Product Overview

The YW-E300/E30A Two-step Series represents an advanced generation of Electro-hydraulic Drum Brakes. Unlike standard single-stage brakes, this series features a sophisticated "Two-step" (or secondary) braking technology.

This design allows the brake to perform a pre-braking action followed by full braking force, making it ideal for high-speed or heavy-load applications where smooth deceleration and impact reduction are critical. It combines the robustness of a drum structure with the precision of electro-hydraulic actuation.

Core Advantages: The "Two-Step" Technology

The defining feature of the E300/E30A series is its Secondary Braking Capability:

Stage 1 (Pre-braking): Upon receiving a signal, the brake applies an initial, lower braking force. This effectively reduces the speed of the mechanism without causing sudden jolts.

Stage 2 (Full Braking): Immediately following the pre-braking phase, the system applies the maximum rated braking torque to bring the machinery to a complete stop.

Benefit: This sequence significantly reduces mechanical shock and vibration, protecting the gearbox and coupling of the driven machinery.

Key Features & Characteristics

High Safety Factor: The two-step process ensures a controlled stop even in emergency situations, preventing load sway in crane applications.

Electro-hydraulic Actuation: Powered by an Ed-series thruster (E300/E30A designation), offering fast response times and energy efficiency compared to traditional hydraulic systems.

Automatic Compensation: Equipped with a self-adjusting mechanism (auto-compensator) that maintains consistent braking torque as the brake lining wears down, eliminating the need for manual adjustment.

Interlocked Equalizing Device: Ensures the brake shoes retract evenly (equal air gap) on both sides, preventing the brake lining from "floating" or rubbing against the drum when released.

Durability: Main pivot points utilize self-lubricating bearings to ensure high transmission efficiency and a long service life.

Manual Release: Features a manual release lever for maintenance and emergency opening.

Typical Applications

The YW-E300/E30A series is specifically designed for demanding environments where precision stopping is required:

Port Machinery: Ship-to-shore cranes and container handlers where load sway must be minimized.

Metallurgy: Steel mills (e.g., continuous casting machines, rolling mills) requiring high reliability.

Mining: High-speed conveyors and hoists.

Heavy-duty Cranes: Gantry cranes and overhead cranes handling sensitive or heavy loads.

General Technical Specifications

Note: The "E300" or "E30A" designation typically refers to the specific generation or modification of the electro-hydraulic thruster used to power the brake, indicating a modernized, energy-efficient actuator design.

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