Abstract:Due to the strong pumping capability and large allowable gap, the bidirectional rotating co-nical pumping ring has been widely used in mechanical seal for cycle cooling system in recent years. In order to adequately understand the fluid flow induced by the pumping ring, the numerical simulation of the three-dimensional turbulent flow field of the pumping ring and the mechanical seal chamber was conducted by a CFD software. The pressure and velocity distributions were obtained and the cavitations volume fraction distribution was analyzed, which revealed the flow law of the pumped fluid by the pumping ring. The pumping capacity of pumping ring was predicted by numerical calculations, the relation of the head(H)-flow rate(Q)has been obtained. The head is about 4.0-2.5 m when the flow rate is 2-3 L/min, which is consistent with the experimental, result in the literature. The influence of different structural parameters on the head-flow correlation were studied, and the results show that the blade thickness, the number of vanes, the gap between the seal chamber and the pumping ring, and the exit angles affect the performance of the pumping ring. The head slightly increases with the blade thickness, and distinctly increases with the numbers of the blade. The head decreases with gap increasing, and slightly increases with the blade exit angles. The head increases about 10% when the exit angle increases from 55°to 80°.
宋鹏云, 贺鹏程. 锥形叶片式泵效环内部流场特性及泵送性能[J]. 排灌机械工程学报, 2015, 33(4): 327-332.
Song Pengyun, He Pengcheng. Characteristics of internal flow and pumping performance for conical blade pumping ring. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(4): 327-332.
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