Self-adaptive forklift potential energy recycling system according to load capacity and control method

Abstract

The invention discloses a self-adaptive forklift potential energy recycling system according to the load capacity. The forklift potential energy recycling system comprises a hydraulic oil way system composed of a lifting oil cylinder, a pump-motor and an oil tank, and further comprises an energy accumulator, a second electromagnetic proportional throttle valve, a first electromagnetic proportionalthrottling valve, a pressure sensor, a flow sensor, a double-acting motor, an inverter, an energy-storage and energy-discharge component and a master control device. According to the self-adaptive forklift potential energy recycling system, in the process of recycling the potential energy of a forklift, the energy accumulator is preferentially selected for recycling, and the potential energy recycling efficiency is improved; in the process of lifting the fork of the forklift, the energy accumulator is preferentially selected for energy discharging so that a strong energy supply can be provided within a short time; and during the recycling process in the electric energy mode, the super capacitor is preferentially selected for electric energy recycling, recycling and discharging of the electric energy with high power can be ensured within a short time, and therefore the storage battery is protected, so that the service life of the storage battery is prolonged.

Description

technical field [0001] The invention relates to a self-adaptive forklift potential energy recovery system and control method according to load weight. Background technique [0002] When a forklift lifts heavy objects, it mainly converts the chemical energy generated by engine combustion into potential energy for lifting the heavy objects. When lowering the heavy objects, the potential energy of the heavy objects is wasted. At present, there are two most common ways to recover the potential energy of forklifts, using accumulator recovery and generator recovery. [0003] Chinese patent CN 105236317 A uses an accumulator to convert the potential energy in the process of cargo descending into hydraulic energy for recovery, which is used in the next lifting operation to improve energy utilization and reduce energy waste. And, at the same time, it reduces the burden on the pump motor or hydraulic pump, which helps to avoid excessive oil temperature. Because the invention only us...

AI Technical Summary

Problems solved by technology

The compound recovery method of this invention improves the efficiency of energy recovery to a certain extent, but the energy recovery of the accumulator relies on experience to manually adjust the proportional throttle valve, and the degree of energy recovery of the accumulator cannot be accurately controlled in real time. When recycling lithium batteries for generators, there will still be safety hazards caused by high-power short-term discharge caused

Images