Reduction of Power Consumption in Hydraulic Capsule Transport System

降低液压胶囊输送系统的功耗

• 批准号: 01550152
• 负责人: TOMITA Yuji
• 金额: $ 0.38万
• 依托单位: Kyushu Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550152/
• 关键词: Hydraulic Capsule Transport; Power Reduction; Capsule Shape; Aqueous Polymer Solution; Capsule Velocity; Pressure Fluctuation; Method of Characteristics; 抵抗減少; カプセル質量; カプセル投入周期; 圧力変化; 異種カプセル混合投入

Measurements were made in a straight horizontal pipeline of 28m length and of 40mm inside diameter. Capsules had wheels, being 180mm long and of 36mm outside diameter. The shape of front and rear edges was chosen among sphere, cone and plane. Capsule velocity was shown to be higher than that of water. The velocity of capsule having spherical edges was higher than those of conical and plane edges. When the capsules having different edges of equal mass were used, the velocity of each capsule reached to the common value with each other. The total pressure drop was found to become lower than that of water alone, when the capsules of spherical edges were used for higher water velocity. When 500ppm aqueous solution of polyethylene oxide was injected from the pipe axis before the capsule loader, the capsule velocity became about 1.5 times larger, and it is concluded that the use of polymer is amost effective method to reduce the power consumption when the most part of pressure drop is caused by the water flow. A numerical simulation was carried out by the method of characteristics for the capsules of plane edges, and it is shown that the capsule motion and the time history of pressure are satisfactorily simulated and that the pressure fluctuation becomes small for small loading period of capsules and for small capsule mass.

测量是在一条长28m、内径40 mm的水平直管道上进行的。胶囊有轮子，长180毫米，外径36毫米。前后边缘的形状在球体、锥体和平面中进行选择。胶囊的速度高于水的速度。球形胶囊的速度高于圆锥形和平面型。当使用相同质量的不同边缘的胶囊时，每个胶囊的速度都达到了彼此的公共值。结果表明，在较高水速时，球形边缘胶囊的总压降比单独使用水时要低。在装包机前从管轴上注入500ppm的聚氧乙烷水溶液时，胶囊的速度增加了约1.5倍，说明当压降的大部分是由水流引起时，使用聚合物是降低功率消耗的最有效的方法。用特征线法对平边胶囊进行了数值模拟，结果表明，胶囊的运动和压力时程得到了令人满意的模拟，胶囊装填周期越小，胶囊质量越小，压力波动越小。