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在制定商品砼泵送施工方案或在设计砼配合比时,有时有必要根据输送条件计算砼泵的输送压力。对此,一般可用下式进行计算: P=P_w(A_w)/(A_0) (1)式中P_w——主油缸工作油压(MPa); A_w——主油缸截面面积; A_0——砼泵缸截面面积。例DC-S115B砼泵车,A_w为75.8cm~2,A_0为254.3cm~2,当P_w为12MPa时,P=3.57MPa。由(1)式可知,当A_w、A_0固定时,砼泵送压力P将随着P_w的变化而变化。实际上影响砼泵输送压力的因素是多方面的,仅用P_w还不能显示出这些因素与输送压力之间的关系。通常砼泵送时由于摩擦阻力的存在,必
When formulating a commercial pumping construction plan or designing the mix ratio, it is sometimes necessary to calculate the feed pressure of the pump based on the delivery conditions. In this regard, the following formula can generally be used to calculate: P = P_w (A_w) / (A_0) (1) where P_w - the main cylinder hydraulic pressure (MPa); A_w - main cylinder cross-sectional area; A_0 - pump Cylinder section area. Example DC-S115B pump truck, A_w is 75.8cm~2, A_0 is 254.3cm~2, when P_w is 12MPa, P=3.57MPa. From (1), we can see that when A_w and A_0 are fixed, the pumping pressure P will change with P_w. There are many factors that actually affect the pumping pressure of the helium pump. The relationship between these factors and the delivery pressure cannot be shown with P_w alone. Usually due to the presence of frictional resistance during pumping, it must be