DYW400-1200 Explosion Protected Electro-hydraulic Drum Brakes

 

 

💡 Key Features & Characteristics

Dual Explosion-Proof Certification:

Complete Unit Certification: Unlike standard industrial brakes where only the motor might be explosion-proof, the entire DYW series brake assembly is certified. Both the electro-hydraulic thruster (pusher) and the brake mechanism itself carry the MA (Mining Products Safety Approval) safety mark.

Safety Standards: It strictly complies with mining safety standards (such as JB/T6406 and specific mining safety regulations), ensuring it is legally and safely operable in underground coal mine environments.

High-Performance Specifications (DYW400-1200):

Brake Wheel Diameter: Designed for a standard 400 mm brake wheel.

Power Supply: Operates on standard mining 3-phase AC power, supporting voltages such as 380V, 660V, or 1140V at 50Hz.

Motor Insulation: Features Class F insulation, providing excellent thermal stability and resistance to burnout under continuous heavy-duty operation.

Environmental Adaptability: Designed to operate reliably in ambient temperatures from -25°C to +40°C, with air relative humidity up to 90%, and at altitudes not exceeding 2000 meters.

Advanced Mining-Specific Safety Designs:

Flame-Retardant & Anti-Static Brake Linings: The brake pads (linings) are manufactured using materials that strictly meet mining safety requirements (MT113-1995). They possess excellent flame-retardant and anti-static properties to eliminate ignition risks during friction braking.

Continuous Duty (S1) Thruster: The integrated electro-hydraulic thruster is rated for S1 (continuous) duty cycle. This prevents motor overheating and burnout, ensuring the brake can remain engaged or frequently cycled during long mining shifts.

Automatic Wear Compensation: Features a mechanical self-adjusting device that automatically compensates for brake pad wear. This maintains a consistent air gap and braking torque without the need for manual intervention.

Wear Limit Alarm System: Equipped with a limit switch that triggers an electrical alarm when the brake pads wear down to their safety limit, signaling maintenance personnel to replace them immediately.

Equal Clearance Mechanism: Utilizes an interlocking linkage system to ensure the clearance between the brake shoes and the wheel remains perfectly even on both sides, preventing uneven wear or "dragging" of the brake.

Seamless Replacement:

The DYW series is engineered as a direct, drop-in replacement for older mining brake models like the BYWZ5 series. It shares identical installation dimensions and center heights, making upgrades straightforward and cost-effective.

🏭 Typical Applications

The DYW400-1200 is a mission-critical safety component designed for a specific environment:

Underground Coal Mining: Primarily used as the service and safety brake for underground belt conveyors.

Hazardous Industrial Zones: Applicable in other environments where flammable gases, coal dust, or explosive atmospheres are present (Pollution Grade 3).

📋 General Technical Specifications

表格

Parameter	Description
Type	Explosion-Protected Electro-Hydraulic Drum Brake
Model Series	DYW Series
Model Variant	DYW400-1200
Brake Wheel Diameter	400 mm
Safety Certification	MA Mark (Mining Products Safety Approval)
Power Supply	3-phase AC 380V / 660V / 1140V, 50Hz
Thruster Duty Cycle	S1 (Continuous Duty)
Ambient Temperature	-25°C to +40°C
Key Features	Full-unit explosion-proof, flame-retardant linings, auto wear compensation

Note: The DYW400-1200 is a vital life-saving device in underground mining. Because it carries the MA safety mark, it must not be altered or operated outside of the specific environmental conditions outlined in its certification. Regular testing of the wear limit alarm and visual inspections of the flame-retardant brake linings are essential to maintain compliance with mining safety regulations.

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