Tandem hybrid fork lift truck

Abstract

The invention provides a tandem hybrid fork lift truck. The tandem hybrid fork lift truck comprises an electric energy providing device, a rectifier, a walking motor, a lifting motor and an electric energy storing device, wherein after alternating current which is provided by the electric energy providing device flows through the rectifier, the electric energy providing device is connected in parallel with the electric energy storing device; after the electric energy providing device is connected in parallel with the electric energy storing device, the output end is collected with the walking motor and / or the lifting motor; the electric energy storing device can be charged to store electric energy and also can discharge to use the stored electric energy; both the walking motor and the lifting motor are generator-motor dual-purpose motors; a driving axle and tyres can drive the walking motor to generate electricity during braking, so that braking energy is converted into electric energy; and under the action of heavy objects, a lifting appliance can drive the lifting motor to generate electricity, so that the potential energy of the heavy objects is converted into electric energy. By the technical scheme of the invention, the potential energy of a falling gantry is converted into the electric energy and stored to ensure that the potential energy is recycled; the braking energy is also recycled during braking; and the tandem hybrid fork lift truck is easy to control and environment-friendly and has small shock at the moment of startup and shutdown.

Description

technical field [0001] The invention relates to a stacker, in particular to a serial hybrid power stacker. Background technique [0002] Empty container stacker is a kind of operating equipment for periodic handling and stacking of containers. During the working process, it is necessary to frequently start braking and lift containers up and down. In the existing stacker, the spreader, the inner mast and the container are lifted to a certain height through the lifting cylinder when the spreader is generally lifted; when the spreader is lowered, it is controlled by adjusting the opening of the control valve. The lowering speed of the spreader is stopped by closing the control valve. During the lowering process of the spreader, most of the potential energy is consumed in vain. There is no recycling, and the energy waste is serious. The lowering of the spreader is controlled by a simple throttle. The system Severe heat generation; in addition, in the forklift operation project,...

AI Technical Summary

Problems solved by technology

In this method, due to the low efficiency of hydraulic transmission, the energy recovered by the accumulator is less, and the characteristics of the accumulator are difficult to store energy in the accumulator smoothly with the change of parameters such as pressure and temperature. The problem of energy recovery has not been solved;

[0006] 2) The hydraulic motor is driven by the potential energy of the falling weight such as the spreader. The hydraulic motor and the generator set are connected in series in the oil return circuit of the boom hydraulic cylinder, and the potential energy is recovered by driving the generator through the hydraulic motor. Due to the short recovery time and the recovery process The hydraulic oil pressure fluctuates greatly, causing the generator to work in a low-efficiency area, and the energy recovery efficiency is low, which is the main defect of this energy recovery method

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