The YWZ8-800/E301 Series Electro-hydraulic drum brakes are a type of braking system typically used for heavy-duty industrial machinery, such as crane travel mechanisms, portal cranes, or other material handling equipment. Here is a description of their key features and operational principles:
Operating Principle:
These brakes utilize an electro-hydraulic thruster as the actuating device. When the motor is energized, the thruster generates hydraulic pressure, which pushes the piston and lever mechanism to release the brake. When power is cut off, the brake is applied automatically by spring force, ensuring fail-safe operation. This design provides reliable holding and controlled braking.
Key Features:
High Torque Capacity: The "800" likely refers to the brake torque rating (e.g., 800 Nm), indicating suitability for heavy loads.
Electro-hydraulic Thrusters (E301 Series): The thruster provides smooth, quiet, and responsive actuation. The "E301" designation specifies the model of the thruster unit, which integrates the electric motor, hydraulic pump, and piston.
Automatic Wear Compensation: Many models include an automatic adjustment mechanism to maintain consistent brake gap and performance as the friction linings wear.
Drum Brake Design: Uses internal brake shoes that expand against the inner surface of a rotating brake drum, offering effective braking force and good heat dissipation.
Robust Construction: Built with heavy-duty materials for durability in harsh industrial environments (dust, moisture, variable temperatures).
Safety: The fail-safe spring-apply design is critical for safety, ensuring the brake engages in the event of a power failure.
Typical Applications:
Travel wheels of overhead cranes and gantry cranes.
Hoist or slewing mechanism brakes.
Mining machinery, conveyor systems, and other industrial drives requiring reliable stopping and holding.
Designation Breakdown:
YWZ8: Often a Chinese industrial standard model code for drum brakes with electro-hydraulic thrusters.
800: Usually indicates the rated braking torque.
/E301: Specifies the series or model of the electro-hydraulic thruster attached.
In summary, the YWZ8-800/E301 Series brakes are reliable, fail-safe braking units designed for industrial machinery, combining the power of hydraulic actuation with the control of electric operation and the safety of automatic spring-applied braking.
