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针对压裂车大功率、高油耗等特点,对采用多台发动机的全液压压裂车进行功率节能匹配优化;根据负载变化规律,采用中位数法识别负载工况;基于发动机样本和液压泵效率台架试验,采用多项式拟合算法分别建立发动机比油耗和液压泵效率模型,找到发动机油耗经济区和液压泵高效区;使用自适应惩罚函数法建立综合油耗目标函数,在各负载工况下,基于遗传算法优化输出最佳发动机转速和液压泵排量比组合,使发动机比油耗较低、液压泵效率较高,实现综合油耗最低.结果表明,当压裂车工作压力为40?70 MPa时,新方案与原方案相比,综合节油率达30.92%?0.05%,平均节油率为6.92%?4.20%,具有较好的节油效果.
According to the characteristics of high-power and high fuel consumption of the fracturing truck, the full-hydraulic fracturing truck with multiple engines is optimized for power and energy saving. According to the load variation, the median condition is adopted to identify the load condition. Based on the engine sample and the hydraulic pump Efficiency bench test, using polynomial fitting algorithm to establish the engine fuel consumption and hydraulic pump efficiency model, find the engine fuel economy zone and hydraulic pump high-efficiency zone; use adaptive penalty function method to establish a comprehensive fuel consumption objective function, under various load conditions , The optimal combination of engine speed and hydraulic pump displacement ratio was optimized based on genetic algorithm to make the engine lower fuel consumption and higher efficiency of the hydraulic pump and achieve the lowest total fuel consumption.The results show that when the operating pressure of the fracturing truck is 40-70 MPa , The new program compared with the original program, the overall savings rate of 30.92%? 0.05%, the average savings rate of 6.92%? 4.20%, with better fuel economy.