YW-K400/E50 Normally-Open Electro-Hydraulic Drum Brake

⚙️ Product Overview

The YW-K400/E50 is a specialized Normally-Open (Fail-to-Run) electro-hydraulic drum brake. Unlike standard safety brakes that engage when power is cut, this model is designed to remain disengaged (open) when de-energized and requires power to apply the braking force.

This specific configuration is critical for applications where the brake must act as a holding device during operation or where a "safe state" requires the machinery to be free to move (e.g., to prevent a load from being stuck in a raised position during a power outage, relying on other safety devices).

💡 Key Features & Characteristics

Normally-Open Logic (NO):

Power Off: The brake is released (springs are compressed or the mechanism is held open), allowing the shaft to rotate freely.

Power On: The electro-hydraulic thruster activates to push the brake shoes against the drum, applying the braking torque.

Electro-hydraulic Actuation (E50 Thruster):

Powered by an Ed-50 (or equivalent E50) series electro-hydraulic thruster. This provides smooth, stepless braking force control and high-frequency operation capabilities.

High Heat Dissipation:

The "K" series (often indicating a specific design modification) typically features improved ventilation or heat-resistant linings to handle the thermal load generated during active braking.

Self-Equalizing:

The mechanism ensures that the braking force is applied evenly to both brake shoes, preventing uneven wear and ensuring the brake lining retracts fully when open.

Adjustable Torque:

The braking torque can be adjusted via the thruster's stroke or spring pre-load settings to match specific dynamic requirements.

🏭 Typical Applications

The YW-K400/E50 is used in scenarios where a "Normally-Closed" brake would be hazardous or impractical:

Tensioning Systems: Maintaining constant tension in wire drawing or cable laying machines.

Vertical Lifts (Specific Modes): Where gravity return is required upon power loss.

Wind Turbines: Pitch control systems or yaw brakes (depending on specific design).

Active Load Holding: Applications where the brake is used to hold a load in a specific position actively during the work cycle.

📋 General Technical Specifications

Note: The "K" in YW-K often designates a specific manufacturer's series for "Open" (Normally-Open) or "Fast" response variants. The E50 refers to the thruster size, which dictates the force output. Always verify the exact torque rating with the manufacturer's datasheet, as "400" refers to the drum size, not the torque directly.

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