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目前差动油缸回路中差动比的决定,一般不考虑回路的阻力损失和效率,仅仅从前进和后退速度比的角度来确定差动比。本文在分析差动油缸问题时,不仅考虑了油缸速度, 而且考虑了回路的阻力损失,从能量消耗最小的角度来分析差动比,提出了“最优差动比”这一概念。在最优差动比的条件下,既能满足工艺要求的油缸推力和运动速度,同时消耗的能量最少,效率最高,发热量最小。文中还给出了利用最优差动比的概念来设计差动油缸的步骤。最后用最优差动比的概念分析了某钢厂250吨脱锭吊液压系统的差动回路。分析证明:用最优差动比的概念来设计差动回路,可以减小阻力损失,降低油泵的功率消耗。
The current differential cylinder circuit differential ratio decision, generally do not consider the loop resistance loss and efficiency, just from the forward and backward speed ratio to determine the differential ratio. In this paper, when analyzing the differential cylinder problem, not only the cylinder speed but also the resistance loss of the circuit are taken into consideration, the differential ratio is analyzed from the perspective of minimizing energy consumption, and the concept of “optimal differential ratio” is put forward. In the optimal differential ratio conditions, both to meet the process requirements of the cylinder thrust and velocity, while consuming the least energy, the highest efficiency, minimum calorific value. The article also gives the use of the concept of optimal differential ratio to design differential cylinder steps. Finally, with the concept of optimal differential ratio analysis of a steel plant 250 tons of stripper hanging differential pressure hydraulic system. The analysis proves that designing the differential circuit by the concept of optimal differential ratio can reduce the resistance loss and reduce the power consumption of the pump.