💡 Key Features & Characteristics
DC Electromagnetic Actuation:
Power Supply: Unlike standard industrial brakes that run on AC 380V, the MWZ series operates on a DC 220V power supply. This often requires a rectifier if connected to a standard AC mains supply.
Operation: It is a normally closed brake. The braking force is applied by a main compression spring when power is off. When DC power is applied, the electromagnet generates a magnetic field that pulls the armature, compressing the spring and retracting the brake shoes to release the drum.
Energy Saving & Efficiency:
The MWZ series is designed as an "energy-saving" brake. The DC solenoid design typically consumes less power and generates less heat compared to older AC solenoid designs (like the TJ2 series), making it suitable for high-frequency operation.
Maintenance-Free Linkage:
Self-Lubricating Bearings: The main pivot points (hinges) are equipped with self-lubricating bearings. This eliminates the need for manual greasing and ensures smooth, consistent movement of the brake arms.
Snap-in Brake Pads: The friction linings (shoes) are often asbestos-free and use a card-mounted (snap-in) structure. This allows for quick and easy replacement of worn pads without disassembling the brake arm.
Equalizing Mechanism:
The brake features an interlocking equalizing device (retracting device). This ensures that both brake shoes retract and apply equally and simultaneously. This is critical for preventing uneven wear and avoiding the "dragging" of one shoe against the drum, which causes heat and power loss.
Safety & Environment:
The unit is designed to be green and safe, utilizing non-asbestos friction materials. It typically includes a lifting hook for easier installation and maintenance of the heavy unit.
🏭 Typical Applications
The MWZ315-630 series is used in heavy industry where reliable, DC-controlled braking is required:
Metallurgy: Steel rolling mills and heavy overhead cranes (often using the "Y" metallurgical variant).
Port Machinery: Ship-to-shore cranes and gantry cranes.
Mining: Large conveyors, ball mills, and hoists.
Construction: Tower cranes and heavy lifting equipment.
General Industry: Transportation machinery and chemical drive units.
📋 General Technical Specifications
表格
| Parameter | Description |
|---|---|
| Type | DC Electromagnetic Drum Brake (Block Type) |
| Model Series | MWZ Series |
| Model Variant | MWZ315-630 (Range) |
| Brake Wheel Diameter | 315 mm, 400 mm, 500 mm, 630 mm |
| Power Supply | DC 220V (Requires rectifier if using AC mains) |
| Ambient Temperature | -25°C to +40°C |
| Humidity | ≤ 90% |
| Altitude | < 2000m |
| Compliance | JB/T 7685-2006 |
Note: The MWZ series is distinct from the MW series primarily due to the power supply. The MW series uses AC 380V, while the MWZ series uses DC 220V. When replacing a brake, it is crucial to match the voltage (AC vs. DC) to your control system. The "315-630" designation suggests a product family; you must verify the exact brake wheel diameter (e.g., is it a 500mm or 630mm unit?) to ensure it fits your machine's shaft and mounting base.
