💡 Key Features & Characteristics
Electro-Hydraulic Fail-Safe Operation:
Power-to-Release, Spring-to-Brake: When the electro-hydraulic thruster is powered on, it generates hydraulic pressure to push the piston rod upward, compressing the main spring and pulling the brake shoes away from the wheel. When power is cut, the spring force instantly clamps the shoes onto the wheel to apply the brake.
Smooth & Safe: Provides highly reliable performance with smooth braking action and the ability to handle high operating frequencies (up to 1200 cycles/hour).
High-Performance Specifications (YWZ4-200/25):
Brake Wheel Diameter: Designed for a standard 200 mm brake wheel.
Driving Thrust: Powered by a matched thruster (such as YTD or Ed series) delivering 250 N of linear force.
Power Supply: Operates on standard industrial 3-phase AC power, typically 380V at 50Hz.
Duty Cycle: Capable of continuous operation (S1) or frequent intermittent duty (S3-60%), making it highly suitable for repetitive braking cycles.
Advanced Mechanical Design:
Equal Clearance Mechanism: Features an interlocking linkage system that automatically keeps the clearance (退距) between the brake shoes and the wheel perfectly even on both sides. This prevents uneven wear or one brake lining from dragging against the wheel.
Self-Lubricating Bearings: The main pivot points are equipped with self-lubricating bearings, ensuring high transmission efficiency and a long, maintenance-free service life.
Quick-Change Linings: The brake pads (linings) use a secure, clip-on insert structure. They are available in various materials (including non-asbestos semi-metallic and soft options) and can be replaced quickly and safely.
Visible Torque Adjustment: The main brake spring is housed in a square tube with a clear external scale, allowing maintenance personnel to easily read and precisely adjust the braking torque without complex calculations.
Environmental Adaptability:
Designed to operate reliably in ambient temperatures ranging from -20°C to +50°C and in environments with relative humidity up to 90%. (Note: For environments with flammable, explosive, or corrosive gases, a special explosion-proof or anti-corrosion version must be selected).1
🏭 Typical Applications
The YWZ4-200/25A is a versatile braking component widely used across heavy industries:
Metallurgy & Mining: Braking mechanisms for conveyors, small hoists, and various handling equipment.
Port & Logistics: Deceleration and parking brakes for port machinery and belt conveyors.
General Construction & Machinery: Ideal for cranes, winches, and general industrial drive mechanisms requiring a reliable, space-efficient fail-safe brake.
📋 General Technical Specifications
表格
| Parameter | Description |
|---|---|
| Type | Electro-Hydraulic Drum Brake |
| Model Series | YWZ4 Series |
| Model Variant | YWZ4-200/25A |
| Brake Wheel Diameter | 200 mm |
| Matched Thruster Force | 250 N |
| Power Supply | 3-phase AC 380V / 50Hz |
| Duty Cycle | Continuous (S1) / Intermittent (S3-60%) |
| Ambient Temperature | -20°C to +50°C |
| Key Features | Equal clearance, self-lubricating, visible torque scale, quick-change linings |
Note: The YWZ4-200/25A complies with standard industrial dimensions (such as JB/T6406 and GB6333-86). When installing, ensure the brake wheel surface is free of severe rust or oil. Regularly inspecting the thickness of the friction linings (replace when worn down to the minimum specified thickness) and checking the hydraulic fluid level in the matched thruster are essential to maintain the brake's optimal safety integrity and performance.
