DYW Explosion Proof Electro-Hydraulic Drum Brake DYW400-1200

DYW400-1200 Explosion-Protected Electro-Hydraulic Drum Brake Full Product Details

1. Product Model Definition & Code Explanation

Full Model No.: DYW400-1200 Explosion-Protected Electro-Hydraulic Drum Brake

DYW400-1200 explosion-protected electro-hydraulic drum brake is a normally closed flameproof braking device driven by BEd series explosion-proof electro-hydraulic thruster. It is specially designed for safety braking in flammable gas and dust hazardous locations. It adopts spring-closed, power-off braking fail-safe principle, with large stable braking torque and reliable flameproof enclosure. It is widely used for underground coal mine belt conveyors, hoists and winches, and can be interchanged with conventional YWZ series explosion-proof drum brakes.

Model Code Interpretation:

• DYW: Explosion-protected electro-hydraulic drum brake series
• 400: Brake drum diameter: 400 mm
• 1200: Rated braking torque: 1200 N·m

2. Product Overview

DYW400-1200 flameproof drum brake is assembled with BEd explosion-proof electro-hydraulic thruster as the driving unit. Under normal power-on condition, the BEd thruster extends to overcome spring force and release the brake shoes from the brake drum, allowing equipment to run. Once power supply fails, the built-in compression spring instantly pushes the brake shoes to clamp the drum tightly for emergency braking.

All electrical components adopt flameproof structure, which prevents internal sparks and arcs from igniting surrounding explosive gas mixtures. The brake frame is of rigid cast structure, matched with high wear-resistant asbestos-free brake linings. It can adapt to long-term cyclic operation in humid, dusty underground mine environments. Optional explosion-proof limit switches can feedback brake release/closing signals for electrical interlock with host control system.

3. Core Features & Product Advantages

• Certified Flameproof Explosion-Proof Structure Flameproof housing for the supporting BEd thruster, marked Ex d I Mb, Ex d IIB T4, safe for methane-containing coal mine and chemical explosive hazardous zones.
• 1200 N·m Stable Rated Braking Torque, 400mm Brake Drum Heavy-duty braking capacity, uniform braking force, suitable for medium and heavy-load mining conveying and hoisting equipment.
• Fail-Safe Normally Closed Safety Design Spring-applied braking, power-off automatic emergency stop. Effectively prevents runaway accidents of belt conveyors and mine hoists when power fails.
• Interchangeable with YWZ Explosion-Proof Drum Brake Consistent installation dimensions with conventional YWZ series drum brakes, convenient for old equipment renovation and replacement.
• High Wear-Resistant Brake Lining Adopts high-performance friction material, stable friction coefficient, low noise, long service life and easy replacement.
• Optional Signal Feedback & Interlock Function Can be fitted with explosion-proof limit switches to send "brake released" and "brake closed" signals, realizing interlock protection with host machine control system.
• Adaptable to Severe Underground Working Conditions Reinforced anti-corrosion coating and good sealing performance, resistant to coal dust, water mist and high humidity in underground mines.
• Complete Explosion-Proof Documents & Factory Test Report Supplied with full set of explosion-proof certificates, inspection records for customer site acceptance and audit.

4. Wide Application Scope

DYW400-1200 explosion-protected electro-hydraulic drum brake is developed for safety braking of mechanical equipment in explosive hazardous areas:

• Underground coal mine belt conveyors, scraper conveyors and hoisting winches
• Chemical workshops with flammable gas and explosive dust atmosphere
• Mining rail transfer carts, underground flameproof cranes and lifting machinery
• All spring-closed safety braking occasions requiring flameproof drum brake
• Retrofit project for replacing old YWZ series explosion-proof drum brakes

5. Detailed Technical Parameters

6. Working Principle

Energized Release State (Normal Operation)

When the mining equipment is ready to run, the supporting BEd explosion-proof thruster is energized. The flameproof motor drives the internal hydraulic pump to build pressure, pushing the piston rod to extend. The lever mechanism compresses the brake spring and pulls the brake shoes away from the brake drum, the brake is released and the machine can operate normally. The flameproof enclosure isolates internal electric sparks all the time.

Power-off Braking State (Emergency & Standby)

When the equipment stops or the power supply is cut off, the BEd thruster loses pressure immediately. Driven by the preloaded brake spring, the brake shoes clamp tightly on the brake drum, generating stable braking torque to stop the drum rotation. This fail-safe design prevents conveyor or hoist runaway under power failure in explosive hazardous areas.

7. Product Customization & After-Sales Service

We supply fully assembled and tested DYW400-1200 explosion-protected electro-hydraulic drum brakes with complete explosion-proof certificates. Custom options are available: special working voltage, high-temperature resistant brake linings, additional explosion-proof limit switches, manual release device and special anti-corrosion coating. OEM and ODM services are supported.

We can provide 2D/3D drawings, hydraulic schematic, wiring diagram and English operation manual for customer approval. Factory direct sales with strict quality inspection. We provide professional technical consultation, installation and commissioning guidance, spare parts supply and long-term global after-sales service for mining and chemical industry customers.