YW-K400/E80 Normally-Open Electro-Hydraulic Drum Brake

 

2. Core Working Principle (Key: Normally Open)

Power-off (Default Running State: Brake Released)When equipment cuts off power, internal reset springs pull the brake linkage to keep two brake shoes fully separated from the 400mm brake drum; the drum rotates freely with no friction drag on operation.

Power-on (Braking State: Shoe Clamping Drum)When braking command is triggered and E80 thruster gets powered, the thruster pushrod stretches out, overcomes spring preload and drives the brake lever to squeeze brake shoes tightly onto drum surface to generate friction torque for deceleration or stop rotation.

Power failure instant reset: Once power cuts unexpectedly, springs immediately retract brake shoes to release brake automatically, avoiding equipment locking caused by sudden power loss.

3. Main Technical Specifications

Matching brake drum: Φ400 mm

Supporting thruster: E80 ED electro-hydraulic thruster, AC380V/400V, 50/60Hz, IP54 protection grade

Rated braking torque: Corresponding calibrated torque for YW-K400 specification

Ambient working condition: -20℃ ~ +50℃, relative humidity ≤90%

Max operating frequency: up to 1200 cycles/hour (S3 intermittent working system)

Friction lining: Snap-in non-asbestos composite lining (optional semi-metallic hard/soft material)

Compliance standards: JB/T6406-2006 (China industry standard), DIN15435 (installation dimension standard)

4. Structural Composition & Unique Advantages

E80 ED Electro-hydraulic Thruster: Core power component for active braking; sensitive response, stable hydraulic output and long service life.

Interlocking equal-clearance shoe device (patented design): Automatically balance gap between dual brake shoes all the time, no frequent manual adjustment required, prevent unilateral lining abrasion or sticking on drum.

Self-lubricating bearings on all hinge pivots: Zero routine grease maintenance, high transmission efficiency and long service lifespan.

Snap-in integral friction lining: Quick replacement without disassembling whole brake frame, cut maintenance downtime greatly.

Enclosed protective spring housing: Shield return springs from dust, splash water and mechanical damage in harsh workshop environment.

5. Key Product Features

✅ Normally-open exclusive design: Only consume electric power during braking, energy-saving for long-time continuous running equipment

✅ Automatic release on power cut: Prevent sudden equipment stall caused by power outage, ideal for crane travelling deceleration scene

✅ Stable & uniform braking: Equal clearance structure guarantees even lining wear and consistent braking effect after long-term operation

✅ Low maintenance cost: Free regular gap calibration + easy lining replacement

6. Typical Application Range

Bridge/gantry crane cart travel mechanism service deceleration (most mainstream matching scene)

Non-lifting industrial fixed winch, conveyor drum auxiliary deceleration braking

Metallurgy, port yard, mining bulk material transport machinery braking system

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