Total power control system of mechanical equipment

Abstract

The invention provides a total power control system of mechanical equipment, which comprises a detection unit, two main pump pressure sensors, an engine working parameter acquisition unit, two electric proportional pressure-reducing valves and a control unit, wherein the control unit is mutually connected with the detection unit, the two main pump pressure sensors, the engine working parameter acquisition unit and the two electric proportional pressure-reducing valves and is used for calculating the power of two main pumps according to two main pump control pressure signals sensed by the detection unit and the pressure of the outlets of the two main pumps, which is detected by the two main pump pressure sensors; when the power of the corresponding pump is greater than engine output power, the displacement of the two pumps can be reduced by the control unit, whereas the power of the corresponding pump is less than the engine output power, the engine speed can be automatically reduced by the control unit to control an engine to output according to the demanded power of the corresponding pump, i.e. the goal that the power is output as needed is achieved, thereby, energy saving is realized.

Description

technical field [0001] The invention relates to the control field of mechanical equipment, in particular to a full power control system of mechanical equipment. Background technique [0002] In recent years, with the rapid development of my country's economy, excavators are widely used in engineering construction, rescue, construction, municipal, farmland, water conservancy, etc., and the energy-saving requirements of excavators in various industries are also getting higher and higher. [0003] In order to realize the energy-saving control of excavators, hydraulic negative flow control and electronic speed sensing control technologies are widely used at home and abroad. These technologies have greatly reduced the fuel consumption of hydraulic excavators. Severely deviate from the economical working area, resulting in low fuel utilization, especially in the case of high speed and small load. The variable load determines that it is difficult to further improve the energy savi...

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Problems solved by technology

[0014] To sum up, the full power control system of the mechanical equipment of the present invention controls the displacement of the two main pumps by adding an electric proportional pressure reducing valve to the control pressure ports of the two main pumps, thus solving the current problem. There is a problem of independent adjustment of the displacement of the two pumps in the negative flow control system; moreover, when the pump absorption power is greater than the engine output power, the control unit can reduce the displacement of the two pumps, and when the pump absorption power is less than the engine output power, the control unit The unit can automatically reduce the engine speed, and control the engine to output according to the required power of the pump, that is, to realize "how much is used, how much is given", thereby realizing energy saving

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