🏗️ What is the DLZ-40?
The DLZ-40 is a Motor-Driven (Electric), Spring-Applied (Fail-Safe) Brake. Unlike hydraulic systems (like the YLZ series), this brake uses an electric motor to release the brake and springs to apply it.
Primary Function: It serves as an anti-wind braking device for the traveling mechanisms of large cranes. It prevents the crane from moving when parked, especially during high winds.
Model Meaning:
D: Electric / Motor-Driven (Diàn).
L: Wheel / Rail (Lun).
Z: Brake / Clamp (Zha).
40: Indicates the specific frame size or nominal clamping force (approx. 40 kN or related metric tonnage).
📋 Key Specifications
表格
| Parameter | Specification | Notes |
|---|---|---|
| Model | DLZ-40 | Part of the DLZ Electric Wheel Clamp series. |
| Actuation | Electric Motor Release | Uses a geared motor to open the jaws. |
| Failure Mode | Fail-Safe (Spring Applied) | Automatically clamps shut if power is cut. |
| Weight | 195 ～ 245 kg | Heavy-duty cast iron/steel construction. |
| Operating Temp. | -25°C ～ +40°C | Suitable for harsh outdoor environments. |
| Storage | Dry, ventilated, no rain/snow | Must be protected from elements when not installed. |
✨ Key Features
Based on the search results, here are the core characteristics of this device:
Fail-Safe Design (Spring Applied):
The brake is normally closed. Powerful springs force the brake arms to clamp onto the wheel flange (edge). An electric motor is only used to release the brake when the crane needs to move. If power fails, the brake automatically engages to secure the crane.
Motor-Driven Mechanism:
Instead of hydraulics, it uses a gear motor. The motor drives a gear transmission that pushes a screw rod to compress the spring and open the brake jaws. This makes it simpler to integrate with the crane's electrical control system without needing a separate hydraulic power unit (HPU).
Wheel Flange Clamping:
It clamps onto the side (flange) of the large crane wheel. This is different from disc brakes (which clamp a disc) or rail clamps (which grip the rail).
Easy Installation & Adjustment:
The DLZ-40 is designed as a self-contained unit. It features an adjustment mechanism to set the correct gap between the brake linings and the wheel flange. It also has a manual release function for maintenance.
Status Monitoring:
It is typically equipped with a limit switch to signal whether the brake is fully released or applied, providing a safety interlock for the crane's control system.
