Heavy-load working condition control system of hydraulic excavator

Abstract

The invention discloses a heavy-load working condition control system of a hydraulic excavator. The system comprises a signal acquiring module, a signal processing module, a display module, a driving control module and an actuation module. The heavy-load working condition control system of the hydraulic excavator acquires nine handle travel signals, nine servo control pressure signals, a first main pump pressure signals and a second main pump pressure signal through the signal acquiring module I nreal time, and sends the signals to the signal processing module for power expected estimation; according to the power demands and change tendency thereof, the driving control module dynamically corrects the absorption power of main pumps; and meanwhile, working state parameters of an engine are adjusted online, so that the output power of an engine power system can satisfy the demands of the main pumps, the working efficiency of the excavator under heavy-load working conditions is guaranteed, the dynamic real-time matching between the power system output and the main pump powder demands under various-load working conditions of the excavator is realized, the excavation efficiency is improved, and the problem of powerless excavation is effectively solved.

Description

technical field [0001] The invention relates to the field of electro-hydraulic control of a hydraulic excavator, in particular to a control system for a hydraulic excavator under heavy load conditions. Background technique [0002] Excavator products are mainly used in heavy-duty operations such as mines. Since the main excavation medium for mining operations is high-density materials such as stones, which have the characteristics of heavy operating loads, the traditional excavator control method has a problem that the excavation efficiency decreases with the increase of load. Quick question. [0003] In addition, the traditional principle of power matching between the main pump and the engine is to discretely divide the output power of the excavator into multiple gears, and each gear corresponds to the corresponding power. Work with the set power parameters. However, because some operators do not predict the working conditions, but choose the middle gear through subjectiv...

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Problems solved by technology

[0006] The invention provides a hydraulic excavator heavy-duty working condition control system to solve the problems existing in the prior art that the power of the main pump and the engine does not match and the hydraulic excavator is unable to excavate under the heavy-duty working condition, and satisfies the heavy-duty conditions. fuel economy under light load conditions

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