YWZ9-500/E201A Drum Brake | 500mm + ED201A Thruster

YWZ9-500/E201A Electro-hydraulic Drum Brake Full Product Details

 

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1. Product Model Definition & Code Explanation

Full Model No.: YWZ9-500/E201A Electro-hydraulic Drum Brake

YWZ9-500/E201A electro-hydraulic drum brake belongs to YWZ9 heavy-duty series normally closed braking equipment, driven by ED201A electro-hydraulic thruster. It adopts spring-applied, power-off fail-safe braking principle. Its core highlight is the built-in automatic wear compensation mechanism, which keeps constant brake clearance automatically as friction lining wears. It complies with GB6333-86 installation standard and JB/T6406-2006 technical standard. It is widely used for heavy-duty cranes, belt conveyors and bulk material handling machinery in ports, metallurgy, steel plants and mining sites, suitable for long-time continuous operation and high-frequency start-stop working conditions.

Model Code Interpretation:

• YWZ9: New generation electro-hydraulic drum brake series with automatic wear compensation function
• 500: Brake drum diameter: 500 mm
• E201A: Matched ED201A electro-hydraulic thruster

2. Product Overview

YWZ9-500/E201A drum brake uses high-performance ED201A 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. Once power is cut off, the brake spring pushes the brake shoes to clamp the drum tightly instantly for emergency braking.

Different from conventional YWZ series brakes, this YWZ9 model is equipped with an automatic wear compensation device. When the friction lining wears gradually after long-term braking, the compensation mechanism automatically adjusts the clearance to maintain the preset gap, so the braking torque stays stable without frequent manual adjustment. The cast frame is rigid and robust; non-asbestos friction lining features stable friction coefficient and good heat resistance. Optional limit switches can feedback brake open/closed and lining wear signals for PLC interlock control. It is designed for heavy-load, continuous-cycle industrial working scenarios.

3. Core Features & Product Advantages

• Automatic Wear Compensation Mechanism Automatically maintains constant brake shoe clearance when lining wears. Stable braking torque all the time, no frequent manual gap adjustment, greatly reduces maintenance workload and downtime.
• Fail-Safe Normally Closed Safety Design Spring-applied braking, power-off immediate emergency stop. Effectively prevents heavy machinery sliding and runaway risks when power or control system fails.
• Heavy-Duty & Stable Braking Capacity Matched with ED201A large thruster, suitable for heavy-load lifting and conveying equipment, reliable braking even under continuous high-intensity cyclic operation.
• High-Performance Non-Asbestos Friction Lining Stable friction coefficient, heat resistant, low noise, long service life and easy replacement.
• Rigid Cast Frame Structure High-rigidity cast steel bracket, anti-impact and anti-vibration, adaptable to dusty, humid and other harsh industrial environments.
• Standard Installation Dimension Compliant with industry standards, convenient for replacement and upgrading of old YWZ, YWZB braking systems.
• Optional Signal Monitoring Function Can be fitted with limit switches to transmit brake release/closed status and lining wear alarm signals, realizing interlock with host control system.
• Customizable Configuration Support different voltage, high-temperature lining, manual release lever and anti-corrosion coating for coastal or special working conditions.

4. Wide Application Scope

YWZ9-500/E201A heavy-duty electro-hydraulic drum brake is specially used for safety parking and deceleration braking of heavy industrial machinery:

• Port gantry cranes, portal cranes, ship unloaders and container cranes
• Metallurgy and steel plant heavy overhead cranes, ladle cranes
• Large inclined belt conveyors, stacker-reclaimers and bulk material handling equipment
• Mining, cement plant, thermal power plant heavy conveying and hoisting machinery
• Renovation project for old heavy-torque braking systems

5. Detailed Technical Parameters

6. Working Principle

Energized Release State (Normal Operation)

When the crane or conveyor is ready to operate, the matched ED201A electro-hydraulic thruster is energized. The internal motor drives hydraulic pump to build pressure and pushes piston rod outward. Through the lever transmission mechanism, the brake spring is compressed and brake shoes separate from the brake drum. The brake is released and the host equipment can run normally. The automatic compensation mechanism keeps the designed clearance ready for next braking cycle.

Power-off Braking State (Emergency & Standby)

When the equipment stops or the power supply is cut off unexpectedly, the ED201A thruster loses pressure quickly. Driven by preloaded brake spring, the brake shoes clamp the brake drum tightly to generate stable braking torque and lock the drum. With the automatic wear compensation device, the clearance will be automatically adjusted after lining wear, ensuring consistent braking performance in every braking cycle and avoiding torque attenuation.

7. Product Customization & After-Sales Service

We supply fully assembled and tested YWZ9-500/E201A electro-hydraulic drum brakes. Custom options include special 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 available.

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 after-sales service for port, metallurgy, mining and heavy industry customers.

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