Velocity modulation fuel saving diesel-electric set electric supply tyre type gantry container crane

Abstract

The invention relates to a tire-type gantry container crane with power supplied by a speed-control fuel-saving diesel generating set, which is characterized in that the crane comprises an electrical system; a three-phase AC power source generated by the diesel generating set capable of operating at variable speed, together with a speed control device thereof, is converted into a DC power source via a power electronic reversible rectifying device used for controlling the generated electricity quantity of the diesel generating set, and then direct current is directly supplied to frequency converters driving mechanisms to operate; the DC power source is converted into an AC power source with adjustable frequency so as to be used for driving a hoisting mechanism, a cart mechanism and a trolley mechanism; a super capacitor set is connected with a DC side bus in parallel; the total capacitance of the super capacitor set is below 10 farad; and a central control link is formed by an intelligent industrial control system and is used for detecting the current and voltage states on the DC bus so as to calculate the power situation of the DC bus, and then the power situation is used as the speed control basis of the diesel generating set so as to control the rotating speed and torque of a generator. The container crane has the advantages of low cost, energy conservation and environmental protection.

Description

technical field [0001] The invention relates to a tire-type gantry container crane, in particular to an energy-saving and environment-friendly novel tire-type gantry container crane which adopts a variable-speed running diesel generator set to realize power supply and a supercapacitor to realize energy buffering and partial recovery. Background technique [0002] Diesel generator sets used as common, standby and emergency power generation for AC power supply are widely used in many fields such as ports, ships, and communications. In practical applications, a large part of diesel generator sets are used as working power sources for mobile equipment to drive renewable power generation loads (such as tire-type gantry container cranes that are widely used in container terminals in the port field). Among these mobile devices, their huge diesel generator sets not only consume high fuel, but also have high noise and black smoke. Especially in recent years, the global energy supply...

AI Technical Summary

Problems solved by technology

[0004] In addition, the tire-type gantry crane still faces the problem of too large installed capacity in the development, mainly because the selected diesel engine must meet the large energy demand at the moment of lifting, which makes its selection more and more difficult, and further Increased energy consumption and emissions when working with light loads

The excess energy is released to the braking resistor when it is lowered, which further aggravates the heat pollution of the whole machine

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