Abstract：The equation for the point of intersection between circular arc and involute curve,the spread angle on starting point and terminal point of vane involute profile in new coordinate system,and the design formulae of vane involute profile have been obtained based on the study of involute properties and geometrical relationship and by mathematical calculations.The two calculation examples are given.The relative merits of the circular arc,logarithmic spiral and involute curve using in slurry pump vane are discussed.The method has practical significance for the design of the vane profile of the pump.
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