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DYW710-2250 Series Explosion Protected Electro-hydraulic Drum Brakes
🛠️ Product Overview: DYW710-2250 This brake is a heavy-duty, fail-safe, drum-type brake . It is part of a series designed to replace older BYWZ5 models, maintaining the same installation dimensions and center height for easy retrofitting. Model Decoding: DYW: Explosion-Proof Electric Hydraulic...
Description
🛠️ Product Overview: DYW710-2250
This brake is a heavy-duty, fail-safe, drum-type brake. It is part of a series designed to replace older BYWZ5 models, maintaining the same installation dimensions and center height for easy retrofitting.
Model Decoding:
DYW: Explosion-Proof Electric Hydraulic Drum Brake.
710: Brake frame size (indicates the approximate diameter of the brake wheel it can accommodate, 710mm).
2250: Rated braking torque (2250 Nm).
📋 Key Technical Specifications
| Parameter | Specification | Notes |
|---|---|---|
| Model | DYW710-2250 | Explosion-proof type. |
| Applicable Brake Wheel | 710 mm | Standard drum diameter. |
| Rated Torque | 2250 Nm | Static braking torque. |
| Power Source | BED Series Thruster | Specifically designed for explosion-proof environments. |
| Voltage | 380V / 660V / 1140V | 3-phase, 50Hz; ±10% fluctuation tolerance. |
| Protection Level | IP55 / IP65 | Dust and water resistant. |
| Explosion Proof Mark | Ex d I Mb | Suitable for underground coal mines (Zone 1/21). |
✨ Key Features
Full Explosion-Proof Certification:
Unlike standard brakes with just an explosion-proof motor, the DYW series has a complete machine safety certificate (MA mark) from the national mining products safety certification center. Both the thruster and the brake frame are certified for hazardous zones.
Fail-Safe Design (Spring Applied):
It operates on a "Power to Release" principle. When powered, the hydraulic thruster lifts the brake arms to release the brake. If power fails, the brake automatically engages via spring force to hold or stop the load.
Integrated Safety Mechanism:
Interlocking Equal Retreat Device: Ensures both brake shoes retract equally, preventing uneven wear or one shoe dragging.
Anti-Explosion Brake Lining: The friction material is specifically formulated to be explosion-proof and resistant to sparking.
Low Maintenance:
The main pivot points use self-lubricating bearings, eliminating the need for frequent greasing in hard-to-reach areas.
Visual Adjustment:
The brake spring is housed in a square tube with a scale ruler, allowing technicians to visually set and verify the spring tension (and thus the braking torque) without complex calculations.
🏭 Typical Applications
The DYW710-2250 is built for heavy industry, particularly in high-risk areas:
Underground Mining: Primary braking for belt conveyors and winches in coal mines.
Metallurgy: Cranes and rolling mills where sparks could ignite dust.
Port Machinery: Ship unloaders handling combustible materials.
Power Plants: Coal handling systems.
💡 Maintenance & Usage Tips
Check the Gap: Regularly inspect the gap between the brake lining and the brake wheel. If the gap is uneven, adjust using the interlocking mechanism.
Spring Scale: Use the scale on the spring housing to verify the spring force. If the indicator drops below the minimum line, the linings are likely worn out or the spring needs retensioning.
Oil Level: Ensure the hydraulic fluid in the BED thruster is at the correct level to ensure full stroke and reliable operation.
Ambient Temperature: If operating below -20°C, ensure the hydraulic oil is suitable for low temperatures (e.g., YH-10 aviation hydraulic oil).
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