YW-E315/E50 Drum Brake | 315mm + E50 Two-Step Thruster

YW-E315/E50 Two-Stage Electro-hydraulic Drum Brake Full Product Details

1. Product Model Definition & Code Explanation

Full Model No.: YW-E315/E50 Two-Stage Electro-hydraulic Drum Brake

YW-E315/E50 two-stage electro-hydraulic drum brake belongs to YW-E series normally closed braking equipment, driven by E50 two-stage electro-hydraulic thruster. It adopts spring-applied, power-off fail-safe braking principle. Its core feature is adjustable two-step braking with delay function: first for smooth cushioned deceleration, second for reliable wind-resistant holding parking. It is equipped with interlocking equal clearance mechanism, self-lubricating hinges and snap-in quick-change brake linings. It complies with JB/T6406-2006 and DIN15435 standards, specially designed for outdoor gantry crane travel mechanisms, belt conveyors and bulk material handling machinery, effectively avoiding braking shock and load swing.

Model Code Interpretation:

• YW-E: Two-stage cushioned electro-hydraulic drum brake series, wind-resistant holding brake type
• 315: Brake drum diameter: 315 mm
• E50: Matched E50 two-stage electro-hydraulic thruster

2. Product Overview

YW-E315/E50 drum brake uses high-performance E50 two-stage electro-hydraulic thruster as the driving unit. When energized, the thruster extends to overcome spring preload and drives the lever mechanism to separate brake shoes from the brake drum, releasing the brake for normal equipment running.

Different from conventional single-stage YWZ brakes, this YW-E model realizes unique two-step braking through a built-in damping cylinder and one-way speed control valve. When stopping, the first stage outputs soft braking torque for gradual deceleration to reduce impact and swing. After an adjustable delay time (1~15s), the second stage applies full holding torque to lock the drum for wind-resistant parking. The interlocking equal clearance device automatically balances the gap between two brake shoes, preventing dragging friction and uneven lining wear. All hinge points adopt self-lubricating bearings without frequent greasing. Optional limit switches can feedback brake open/closed status signals for host electrical interlock control.

3. Core Features & Product Advantages

• Adjustable Two-Stage Cushioned Braking First step: soft deceleration to eliminate mechanical shock and load sway; second step: delayed full holding torque for stable wind-resistant parking. Delay time adjustable from 1s to 15s via one-way flow control valve.
• Interlocking Equal Clearance Mechanism Automatically keeps consistent clearance on both brake shoes, avoids unilateral friction and uneven lining wear, reduces frequent manual gap adjustment and extends lining service life.
• Fail-Safe Normally Closed Safety Design Spring-applied braking, power-off immediate emergency stop. Reliable safety protection against runaway and wind drift for outdoor cranes.
• Self-Lubricating Hinge Structure, Low Maintenance High-precision self-lubricating bearings at all moving joints, flexible transmission, no regular grease filling, suitable for high-frequency start-stop cycles.
• Quick-Change Snap-In Brake Lining Cartridge-type lining installation structure, no need to disassemble the whole brake during replacement, saves maintenance time and labor cost.
• Rigid Cast Frame & Stable Friction Performance High-rigidity cast bracket, anti-impact and anti-vibration. Non-asbestos friction lining with stable friction coefficient, heat resistance and low noise, adaptable to open-air, dusty and humid working sites.
• Standard Interchangeable Mounting Dimension Compliant with JB/T6406-2006 and DIN15435, easy replacement and upgrade for old crane travel braking systems.
• Optional Signal Feedback Function Can be fitted with limit switches to transmit brake release and closed status signals, realizing interlock with PLC control system to prevent misoperation.

4. Wide Application Scope

YW-E315/E50 two-stage electro-hydraulic drum brake is mainly used for travel mechanism braking and wind-resistant parking of outdoor heavy industrial machinery:

• Outdoor gantry cranes, portal cranes, container cranes and ship unloaders
• Crane travel and trolley running mechanism requiring shock-free deceleration
• Large inclined belt conveyors and bulk material stacker-reclaimers
• Cement plants, thermal power plants and mining heavy conveying equipment
• Wind-resistant holding brake renovation for outdoor crane projects

5. Detailed Technical Parameters

6. Working Principle

Energized Release State (Normal Operation)

When the crane or conveyor is ready to operate, the matched E50 two-stage thruster is energized. The internal motor drives the hydraulic pump to build pressure and pushes the piston rod outward. Through the lever transmission mechanism, the brake spring is compressed and brake shoes separate from the brake drum. The interlocking equal clearance device keeps balanced gap on both sides, the brake is fully released and the host equipment can run normally.

Power-off Two-Stage Braking State (Stopping & Wind Holding)

When the equipment stops or power supply is cut off, the E50 thruster loses pressure. The first-stage spring acts first to generate soft braking torque for slow, cushioned deceleration, which greatly reduces impact and load swing. After the preset delay time controlled by the damping cylinder and one-way speed valve, the second-stage spring takes effect to output full holding torque, locking the brake drum tightly for reliable wind-resistant parking. This design avoids hard sudden stop and protects the crane travel mechanism and conveyor structure.

7. Product Customization & After-Sales Service

We supply fully assembled and strictly performance-tested YW-E315/E50 two-stage electro-hydraulic drum brakes. Custom options include special regional working voltage, high-temperature resistant friction linings, salt spray anti-corrosion coating for coastal ports, limit switch monitoring system and manual release device. OEM and ODM services are fully supported.

We can provide 2D installation drawings, wiring diagrams and English operation manuals for customer approval. Factory direct supply with strict factory inspection. We provide professional technical consultation, installation & commissioning guidance, global spare parts supply and long-term stable after-sales service for port, metallurgy, mining and heavy industry customers.

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