Energy recovery system of hybrid single-pump multi-execution component engineering machinery

Abstract

The invention discloses an energy recovery system of a hybrid power single-pump multi-implementation-element engineering machine. The energy recovery system mainly comprises a planetary gear mechanism, a variable pump, an engine, a proportion direction valve, a variable motor, a fuel tank, a signal control unit, a rectifier / inverter, a variable frequency motor, a super-capacitor and the like. The signal control unit obtains a control signal from a control handle and a pressure sensor, sends out a control command to the engine, the variable pump, the proportion direction valve, an electromagnetic reversal valve, the rectifier / inverter, and the variable motor so as to control the position of the throttle position of the engine, the discharge capacity of the variable pump, the valve core displacement of the proportion direction valve, the work station of the electromagnetic reversal valve, the rotating speed of the variable frequency motor, and the discharge capacity of the variable motor, and therefore controls the action of the fuel tank. After the invention uses the planetary gear mechanism, a hybrid power system and the energy recovery system share one variable frequency motor, thereby reducing the installation space, and can recover the energy directly, thereby improving the recovery efficiency of the energy recovery system.

Description

technical field [0001] The invention relates to a hydraulic control system characterized by electro-hydraulic control technology, in particular to an energy recovery system of a hybrid power single-pump multi-actuator construction machinery. Background technique [0002] With the increasingly serious problems of energy shortage and environmental pollution in the world, it is of great practical significance to study the energy saving of construction machinery. Since the power cylinders in the multi-actuator construction machinery have to repeatedly lift and lower heavy objects, and the inertia of the mechanical arms of the construction machinery is relatively large, a large amount of potential energy or kinetic energy will be released when the mechanical arms descend or brake. In machinery, this part of the energy is difficult to recover, store and reuse, which not only causes waste of energy, but also causes hazards such as heat generation, noise, vibration and shortening of...

AI Technical Summary

Problems solved by technology

This energy recovery system has two motors / generators with complex structure and large volume. At the same time, all the potential energy released by the load drop is recovered and reused through multiple times from potential energy-hydraulic energy-mechanical energy-electrical energy-battery-drive variable pump mechanical energy Energy conversion, the energy flow in the system is very complicated, which affects the energy recovery efficiency of the system

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