【摘要】 选择65Y60型离心油泵为对象,对叶轮切割定律以及叶片数的影响规律进行了实验研究。研究表明,流量、扬程、轴功率和效率切割指数具体数值都与普通清水离心泵不同。最优工况的流量、扬程、轴功率和效率切割指数明显依赖于液体粘度和叶轮切割量,粘度越高,切割量越少,与现有清水离心泵理论切割指数偏离越大。当切割量增大时,切割指数有向理论切割指数靠近的趋势。叶片数对扬程切割指数的影响最大,对流量切割指数影响较小,对轴功率和效率切割指数影响最小。更多还原

【Abstract】 The commercial centrifugal oil pump of type 65Y60 has been chosen as a test object, and the affinity law accounting impeller trimmed and effect of the number of blades have experimentally investigated. The results show that the values of the flow rate, head, shaft power and efficiency trim exponents differ from existing trim exponents for normal centrifugal water pumps. The flow rate, head, shaft power and efficiency trim exponents highly depend upon the liquid viscosity and impeller diameter trimmed at best efficiency point. The thicker the viscosity is and the less the diameter is trimmed, the larger the exponents show departure from existing analytical trim exponents for normal centrifugal water pumps. When the diameter is trimmed larger, the test exponents demonstrate a trend closing to the analytical exponents. The effect of the number of blades on the head exponent is the largest, on flow rate exponent is lager and on power, efficiency exponents are minimal.更多还原