Active and passive compound control system for hybrid power hydraulic excavator

Abstract

The invention discloses an active and passive compound control system for a hybrid power hydraulic excavator. According to the active and passive compound control system for the hybrid power hydraulic excavator, a control circuit comprises a hydraulic pump A, a hydraulic pump B, a hydraulic pump C, a movable arm cylinder control valve bank, a bucket rod cylinder control valve bank, a bucket control valve, a rotation control valve, a rotating motor control valve bank, a two-position and two-way valve I, a two-position and two-way valve II, a two-position and two-way valve III, a two-position and two-way valve IV, a two-position and two-way valve V, a two-position and two-way valve VI, a two-position and two-way valve VII, a two-position and three-way valve I, a two-position and three-way valve II, an energy accumulator I and an energy accumulator II, an open type control circuit is adopted to serve as the control circuit, the two cavities of a hydraulic cylinder are each controlled through a power source, and the pressure and the flow of each cavity are regulated independently. The active and passive compound control system for the hybrid power hydraulic excavator has the multiple technical advantages that the energy efficiency is high, the degree of integration is high, power consumption is low, power supply redundancy is avoided, a pilot oil source is not needed, the noise is low, and kinetic energy recovery and potential energy recovery are integrated.

Description

technical field

[0001] The invention belongs to the technical field of hydraulic systems, and in particular relates to an active and passive composite control system for a hybrid power hydraulic excavator. Background technique

[0002] With the tremendous development of my country's construction machinery industry, excavators have become one of the important pillar industries. Therefore, how to effectively reduce the energy consumption of hydraulic excavators during work, and at the same time, the research on its power, transmission, hydraulic systems and energy recovery technology has become an important research direction and research hotspot in mechanical engineering disciplines at home and abroad.

[0003] The introduction of hybrid power into the excavator can improve the matching effect of the engine and the hydraulic system, make the engine work more in the high-efficiency area, reduce fuel consumption, and at the same time use electrical methods to recycle the wasted...

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