The mobile gantry crane is an indispensable key engineering machinery equipment used in the industry for lifting materials such as cement, steel, workpieces, etc.
There are three common speed control methods for hoisting mechanisms of mobile gantry cranes:
1. Multi-speed wound rotor motor
This kind of motor has the characteristics of easy maintenance and high reliability. The power is larger than squirrel cage motor and can reach 55~75kW.
2. Differential planetary reducer plus double motor
This kind of motor has a large speed range, can realize heavy-duty low-speed, light-load high-speed, and has high reliability. It is commonly used on large-tonnage mobile gantry cranes.
3. Frequency control
This is the most advanced AC speed control mothod, easy to speed regulate and high reliability, can be zero speed braking and no impact operation. It can extend the service life of wire ropes and transmission components, is the future development direction of mobile gantry crane hoisting mechanism.
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