Design and Fabrication of impeller for Single Suction Centrifugal Pump

Abstract

This paper presents the calculation and production procedure of impeller for single section centrifugal pump. The pump type is single stage centrifugal pump with close impeller type. This impeller develops a head of 20 m and delivers 0.9 m3 /min of water. The designed impeller has 97 mm inlet diameter, 226 mm outlet diameter, 20 ̊ inlet vane angle and 23 ̊ outlet vane angle. The total number of vane is 6 and input shaft power is 6 hp. The inlet and outlet width are 26 mm and 18 mm respectively. The discharge pipe diameter is 80 mm to operate the desired head and capacity. Based on the designed results, the impeller is also fabricated. There are four steps to produce the impeller. The first step is to draw a pattern design and then the pattern machining on CNC milling machine (Optimum, F 105) for pattern making. The mould making and casting process are used the sand casting method. This method is suitable for cast iron material and cheaper than the other methods. In this foundry process, Cupolar type furnace is used. Moreover, this study supports to develop the manufacturing method of pump impeller and to be able to produce in localization and with low costs. The designed single-suction centrifugal pump can fulfill the requirements of chemical plants, domestic applications, water supply process and agricultural process.