Abstract：To construct a general model suitable for calculating volume utilization coefficient(VUC)of all kinds of external meshing rotor pump, first, for one type of rotor with wide-top which could reduce radial leakage, the general profile structure and profile equation with change in instantaneous center radius were given; secondly, based on a rotor pair with exactly the same structure and size, and the geometric relationship of the rotor pair in minimum clearance position, the accurate calculation formula of conjugated cross-section area and VUC with instantaneous center radius was derived step by step; finally, the cycloid rotor was used as an example for verification and analysis. The results show that effective cross-section area has two parts: inherent cross-section area of rotor itself and minimum clea-rance additional cross-section area of rotor pair. It can also be divided into smaller dynamic conjugated cross-section area affected only by instantaneous center radius and larger static pitch circle cross-section area. Lobe number, initial normal angle and addendum angle are three independent parameters which affect effective VUC. The larger the lobe number, the smaller the effective VUC is; the larger the initial normal angle, the larger the effective VUC is;the larger the addendum angle, the smaller the effective VUC is. The addendum angle has a little effect on the effective VUC, which is beneficial to reduce radial leakage. The general calculation model of effective VUC can provide theoretical basis for further research on rotor pumps.
李玉龙*,臧勇,赵岩,李秀荣. 转子泵容积利用系数的通用计算模型[J]. 排灌机械工程学报, 2021, 39(2): 116-121.
LI Yulong*,ZANG Yong,ZHAO Yan,LI Xiurong. General calculation model of effective volume utilization coefficient for rotor pumps. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(2): 116-121.
