1. Model Interpretation & Core Function
The YW-L200/E23's model code reflects its practical design orientation, key parameters, and matched components for quick equipment pairing:
| Model Segment | Meaning |
|---|---|
| YW-L | Practical-Type Electro-Hydraulic Drum Brake Series ("L" = lightweight, user-friendly, easy maintenance) |
| 200 | Brake drum diameter: 200 mm (medium-sized drum for medium-duty loads) |
| E23 | Matched electro-hydraulic thruster model (E-series, 23 denotes 230 N rated thrust and power parameters) |
Its core functions target safety and practicality for industrial machinery, addressing basic braking and load-holding needs:
Routine Braking: Smoothly decelerates or stops machinery during normal operation, adapting to intermittent (S3-60%) or short-term continuous duty cycles.
Emergency Stopping: Rapidly engages in power loss, thruster failure, or overspeed (≥110% of rated speed) to prevent machinery runaway and avoid material spillage or equipment damage.
Static Load Holding: Secures medium loads (e.g., 5–15 ton lifted goods, conveyor materials) during downtime, maintenance, or power outages-ensuring zero accidental movement.
Adjustable Braking Force: Clear spring force adjustment scales enable on-site tuning of braking torque to match different load requirements.
2. Working Principle
The YW-L200/E23 operates on a fail-safe principle (spring force for braking, electro-hydraulic thrust for release), with a straightforward mechanical structure for reliable performance. Its working cycle includes three key states:
2.1 Brake Engagement (Safety State: Default)
When the machinery is stationary, in emergency, or powered off, the brake is in its default engaged state. Internal high-tension brake springs (housed in a square tube) expand outward.
The spring force pushes the brake arms and arc-shaped brake shoes to swing outward, pressing the friction pads tightly against the inner wall of the rotating brake drum.
Friction between the pads and drum generates stable braking torque (250–400 N·m), resisting the drum's rotation to stop the connected machinery shaft or hold it stationary.
2.2 Brake Release (Operating State)
When the machinery needs to run, the matched E23 electro-hydraulic thruster is activated. The thruster's motor drives an internal hydraulic pump, building pressure to push the piston upward.
The piston's linear thrust (230 N) overcomes the brake spring force, pulling the actuating lever and brake arms inward. This retracts the brake shoes, creating a 0.4–0.7 mm clearance between the friction pads and drum.
The brake drum rotates freely with the machinery shaft, enabling normal operation (e.g., crane lifting, conveyor movement).
2.3 Emergency Response (Fault State)
In case of power loss, thruster oil leakage, or emergency shutdown signals, the thruster's hydraulic pressure dissipates instantly.
The brake springs rebound within ≤0.4 seconds, driving the brake shoes to re-clamp the drum-engaging the brake rapidly to stop the machinery and eliminate safety hazards.
