Question

A centrifugal pump is equipped with an impeller that is mounted on an overhung shaft of diameter 30 mm as shown in the figure. The pump is to be driven at 3600 rpm and delivers 100 L/s. The main dimensions of the impeller are as follows: Impeller outer radius (R2) = 120 mm Radius at the wearing ring (R1) = 68 mm Hub radius (nn) = 28 mm =65 mm Shaft radius = 15 mm Rsuc. At the normal operating condition, the suction pressure is 100 kPa abs, and the pressure in the volute casing is 1.3 MPa abs. Determine the following: a) The unbalanced axial thrust (Tu), and b) The radius of the pump-out vanes (R) to be used at the back shroud for balancing this axial thrust. R, Rsuc. M __-

Answer 1

0.0452 2 ./m Afca mfellir dhcial erust JAv 2 2 V TDN/6o 45.25 4523. 4523K 45. 23m/ 2 Herelametar ef infelle 1202 24d 0-2fm heraduis sedl gptlus punfoit vaces Ltobe lere predture 1.3 MPa . 3N/n 4523 3 A A2 3479.46 mm 2 2.3.4796 1o-3, 3.4796I0 T4Adol O.066 5m 2 Scanned with CS CamScanner