Mobile Gantry Crane

Mobile Gantry Crane (RTG) Fuel Saving System Solution

First, the device description

The gantry crane is a deformation of the bridge crane. In the port, mainly for outdoor freight yard, yard cargo, bulk cargo loading and unloading operations. Its metal structure like a door frame, carrying the main beam under the installation of two legs, you can walk directly on the ground track, the main beam at both ends can have extended cantilever beam. The gantry crane has the advantages of high utilization rate, wide operating range, wide adaptability and versatility. It is widely used in the port freight yard.

Second, the process requirements

System operation is reliable, high efficiency, energy saving

Third, the program description

The system uses a dedicated controller, according to the size of the load, real-time adjustment of three variables: the speed of diesel engines, synchronous generator torque, synchronous generator excitation, so that the diesel engine at work in the best efficiency. The generator drive controller is the actuator that controls the synchronous generator torque and excitation. The output voltage of the generator is converted into DC voltage by the driver, and the DC bus is provided in the super capacitor for the inverter used for lifting and walking. powered by. The use of super capacitor effective storage upgrade mechanism down the potential energy, improve the system’s fuel economy. The AC power required in the system is provided by an inverter power supply, which is also powered by a DC bus.

Fourth, the program advantages

1, according to the system load conditions, adjust the diesel engine speed, so that the diesel engine in the best efficiency of the state;

2, the synchronous generator excitation and torque were controlled, effectively improve the system efficiency;

3, the whole system of oil saving rate of 40% to 70%;

4, the use of super capacitor energy storage, in an effective way to improve system efficiency, while ensuring the quality of power generation;

5, a total DC bus power supply system, can simplify the system design, and improve system reliability;

6, the use of open frequency converter, so that the size of the control cabinet, protection level improved.