Crane technology development trends
Energy-saving technology development trends of hoisting machinery powered by oil-fired generators The process of converting fuel into electrical energy is inefficient, and energy waste is serious.
As for the energy-saving technology of cranes powered by oil-fired generators, there have been researches at home and abroad, and the first accepted by people is the super capacitor energy storage technology. Because the reverse conversion cannot be realized after the fuel is converted into electric energy, storing the electric energy generated by the motor running in the power generation state is the only solution. Due to factors such as the reliability, cost and volume of supercapacitor technology, this technology has great limitations in practical engineering applications. Subsequent research has turned to saving the fuel consumption of the fuel-fueled engine during standby, because the equipment consumes little electricity during standby, and the standby time is often very long, exceeding the actual working time. Therefore, reduce the standby speed of the fuel-fueled engine. The speed can significantly reduce fuel consumption.
However, after the standby speed of the fuel oil engine is reduced, the output voltage and frequency of the generator are also reduced accordingly. Therefore, a small-capacity power supply stabilization device needs to be added so that the hoisting machinery can be in a normal standby state. The technology of the power stabilization device is mature, but because it is a new concept product, it has not yet been mass-produced. It is not enough to solve the energy-saving problem of hoisting machinery powered by oil-fired generators only from the perspective of fuel-saving technology. It will be more effective if you consider the problem from a larger scope, such as restricting the high mobility of cranes, through reasonable planning and reasonable configuration of production equipment, and using fuel generators as little as possible for power supply and directly using the power supply network for power supply, the energy consumption Will be reduced more significantly.
Some port units in China have taken the lead in such an attempt to change the power supply mode of the tire cranes at the container yard from the original diesel generator power supply to the trolley line power supply mode, which has achieved obvious energy-saving effects. The cranes deployed on the terminal container yard adopt a way of moving along a fixed track, and can directly use the power grid to supply electricity, which fundamentally avoids the low efficiency problem in the process of converting fuel into electricity.
In fact, cranes powered directly by the power supply network account for the majority. With the continuous improvement of energy-saving awareness and the incentives and penalties of relevant national laws, fuel-powered cranes only exist in a few occasions. Therefore, the energy-saving applications discussed in this article Technology will have a wider range of applications.
