Energy-saving control method for cooling system of excavator

Abstract

The invention discloses an energy-saving control method for a cooling system of an excavator and belongs to the technical field of energy saving control of cooling systems of engineering machinery. The method comprises the following concrete steps that: a master controller sets a target rotation speed and power of a hydraulic main pump based on a power mode and an accelerator knob input signal; conditional judgment is carried out on cooling water temperature, air inlet temperature and hydraulic oil temperature signals of an engine, a PWM (pulse-width modulation) signal is output, and the power of an independent cooling pump is adjusted; load vibration of the excavator under different work conditions is judged according to the power required by the cooling pump, a PWM signal is output to adjust the power of the hydraulic main pump under the rotation speed sensing control of an ESS (engine speed sensor) through two-dimensional fuzzy PID (proportion-integral-differential) adjustment, so that the output power of the engine is matched with the power of the hydraulic main pump and the power of the cooling pump. The energy-saving control method disclosed by the invention has the beneficial effects that optimal matching between the output power of the engine of the excavator and the power of the hydraulic main pump and the power of the cooling pump can be realized, adaptive control can be realized, and the stationarity and working efficiency of system operation can be improved, while the oil consumption and noises are effectively lowered.

Description

technical field [0001] The invention relates to an energy-saving control method for a heat dissipation system in the field of construction machinery, in particular to an energy-saving control method for a heat dissipation system of an excavator, and belongs to the technical field of energy-saving control for heat dissipation systems of construction machinery. Background technique [0002] At present, the cooling system of domestic crawler excavators includes two parts: the cooling water cooling system and the hydraulic oil cooling system. Usually, the engine directly drives the cooling fan for heat dissipation, and the speed, power, and driving torque of the cooling fan are directly related to the speed of the engine. Installation The location is also limited, resulting in insufficient cooling capacity during low-speed and heavy-load operations, which leads to major problems such as high operating temperature of the whole machine, high fuel consumption, large vibration, and h...

AI Technical Summary

Problems solved by technology

[0002] At present, the cooling system of domestic crawler excavators includes two parts: the cooling water cooling system and the hydraulic oil cooling system. Usually, the engine directly drives the cooling fan for heat dissipation, and the speed, power, and driving torque of the cooling fan are directly related to the speed of the engine. Installation The location is also limited, resulting in insufficient cooling capacity during low-speed and heavy-load operations, resulting in major problems such as high operating temperature, high fuel consumption, large vibration, and high noise.

[0003] Among the existing domestic excavator power adaptive energy-saving control technologies, domestic construction machinery products, especially excavators, rarely use completely independent heat dissipation for their cooling systems

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