提高超低比转速离心泵效率的方法  

Method of Improving Efficiency of Low Specific Speed Centrifugal Pump

作　　者：齐学义[1] 刘永明[1] 胡家旺 李凤成[1] 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]中国石油大庆石化公司,黑龙江大庆163000

出　　处：《水电能源科学》2011年第2期118-120,共3页Water Resources and Power

摘　　要：针对轴封、轴承、叶轮圆盘摩擦引起的机械损失及泵内水力损失、容积损失导致超低比转速离心泵效率低的问题,提出了尽可能提高水泵转速、选择较大的叶片出口安放角、增大叶片出口宽度、适度增加泵体喉部面积、采用长短叶片相结合的复合式叶片等5种方法可有效提高超低比转速离心泵效率,并采用试验模拟方法验证了复合式叶轮泵效率（49.49%~54.14%）比4叶片普通叶片泵效率（43.80%）提高了5.69%~10.34%,节能效果显著。Aiming at the mechanical loss caused by shaft seal,bearing,impeller disk friction and the hydraulic and volume losses resulting in low efficiency of super-low specific-speed centrifugal pump,five kinds of methods are put forward to improve the efficiency of super-low specific-speed centrifugal pump,such as increasing pump speed,choice of larger blade outlet setting angle,increasing blade outlet width,appropriately increasing throat area of pump body,adopting composite blade combined with long and short blades.Experimental simulation method is used to verify the high efficiency of composite impeller pump and the results show that the energy-saving effect is remarkable;meanwhile the efficiency of composite impeller pump is higher 5.69-10.34 percent than that of ordinary impeller pump with four blades,which increases from 43.80 percent to 49.49-54.14 percent.

关 键 词：超低比转速 离心泵 效率 转速 叶片出口 安放角 宽度 喉部面积 复合式叶片 

分 类 号：TH311[机械工程—机械制造及自动化]