Hydraulic system control method and apparatus for fuel charger

Abstract

The invention relates to a control method of the hydraulic system of a fuel tanker, which controls a motor driving a positive displacement pump in the hydraulic system by controlling operating frequency and comprises the steps of a detection stage: detecting an input voltage signal; an operating stage: operating according to preset frequency corresponding to the voltage signal when the detection result shows that one input voltage signal exists, and operating according to the preset frequency corresponding to the input voltage signal with high priority level when the detection result shows that two input voltage signals exist. The method and the device realizing the method realize the rotating speed regulation of the positive displacement pump by changing the rotating speed of the motor driving the positive displacement pump through continuously changing the power frequency, thus leading the fuel tanker to operate in a best working condition, improving the energy utilization rate and reducing the energy loss.

Description

technical field [0001] The invention relates to a method and device for controlling refueling of a fuel dispenser, in particular to a method and device for frequency conversion control of a hydraulic system of a fuel dispenser. Background technique [0002] A fuel dispenser is generally a complete liquid delivery system consisting of motors, positive displacement pumps, oil and gas separators, flow measurement transducers, encoders, control boards with counters, indicating devices, solenoid valves, oil sights, and oil guns. Transport and measurement systems. When the fuel dispenser is working, the positive displacement pump transports the oil from low to high, from low pressure to high pressure, along the pipeline to the flow measurement transducer to measure the volume of oil, and finally delivers it to the user from the oil gun. The difference between the fuel tanker and the general hydraulic transportation system is that the fuel tanker has high measurement accuracy requ...

AI Technical Summary

Problems solved by technology

[0011] In the existing refueling method, from the moment the refueling gun is lifted, the volumetric pump runs at full speed until the end of the whole refueling process, which causes a waste of power source, and when it is necessary to reduce the refueling flow, it can only be reduced by reducing the flow path Aperture, that is, to achieve the purpose of reducing the flow rate by setting additional resistance, not only increases the impact and wear of the liquid on the positive displacement pump, but also shortens the service life of the positive displacement pump, which is very unfavorable for energy saving and consumption reduction. Optimal control of the operating conditions, so that the entire fuel dispenser system can reduce energy waste, reduce the internal pressure of the entire pumping system, reduce mechanical wear, and reduce noise

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