The QWZ5-315/50 series pneumatic drum brakes are primarily used for deceleration, parking braking, and safety protection of industrial machinery with on-site compressed air supply, focusing on heavy-duty, high-frequency operation scenarios requiring fail-safe and stable braking. Below are its core application fields with typical use cases:
Core Application Fields & Typical Scenarios
Crane Systems (Most Common)
Bridge cranes, gantry cranes, jib cranes, and electric hoists: Used for trolley/traverse deceleration, main hoist parking braking, and emergency braking to prevent load slipping during power/air loss.
Ideal for medium-to-large cranes requiring 800–1200 N·m braking torque, matching its spring-actuated, air-released design.
Belt Conveyors
Mining, port, and metallurgical belt conveyors: Applied to drive roller braking, downhill conveyor anti-runaway, and parking braking for long-distance, heavy-load belts.
Its self-balanced shoe clearance and stable braking ensure uniform torque, avoiding belt damage from uneven braking.
Port & Harbor Handling Equipment
Container handlers, ship unloaders, and gantry cranes: Used for slewing, luffing, and travel mechanism braking, adapting to high-cycle operations (S3-60%, 1200 cycles/hour).
Resistant to coastal humidity (≤90% RH) and ambient temps (-20°C to +50°C), suitable for outdoor port environments.
Metallurgical & Heavy Machinery
Rolling mills, continuous casters, and material transfer lines: Provides reliable braking for auxiliary drives, preventing equipment damage from inertia during shutdowns.
Its clip-on linings and self-lubricating hinges reduce maintenance downtime in dusty, high-temperature workshops.
Other Industrial Mechanisms
Winches, elevators, and rotary kilns: Used for tension control, parking braking, and emergency stop in systems with on-site compressed air (0.5–0.7 MPa).
Complies with GB6333-86 and JB/T6406-2006, ensuring compatibility with standard industrial drive systems.
Key Application Advantages
Fail-safe design: Brakes via spring force when air supply is cut off, preventing accidents from sudden air loss.
Low maintenance: Self-lubricating bearings and clip-on linings enable quick replacement without disassembling the brake body.
Stable performance: Interlocking shoe clearance balancing avoids one-side pad drag, ensuring consistent braking torque for heavy loads.
