What are the overload limiters for single girder cranes?

2024-05-24

The overload limiters for single girder cranes mainly include the following types:

  1. Mechanical Overload Limiters:
    • Lever-type Overload Limiter: Uses a lever mechanism to sense the load weight. When overloaded, it triggers an alarm or cuts off the power.
    • Spring-type Overload Limiter: Senses load changes through spring deformation. When the preset overload value is reached, it triggers an alarm or protective device.
  2. Electronic Overload Limiters:
    • Strain Gauge Overload Limiter: Measures load weight using strain gauge sensors. When the load weight exceeds the set value, the system issues an alarm or stops the crane's operation.
    • Pressure Sensor Overload Limiter: Detects changes in hydraulic system pressure to determine load weight. When the pressure exceeds the preset value, it triggers overload protection.
  3. Intelligent Overload Limiters:
    • Digital Overload Limiter: Utilizes digital sensors and microprocessor technology to accurately measure and display the load weight. When overloaded, it issues an alarm or automatically stops the crane's operation.
    • Wireless Overload Limiter: Uses wireless transmission technology to send load data to the control system, enabling remote monitoring and management. It automatically triggers protection measures when overloaded.

These overload limiters ensure that the crane operates within a safe load range, preventing equipment damage and safety accidents caused by overloading.