JPS57206795A - Vortex flow pump unit - Google Patents

Abstract

PURPOSE:To obtain a fluid at a high pressure with a small flow quantity by forming individual fluid passages on both sides of an impeller and connecting both fluid passages in series so that the cross section area of the fluid passages is made one half of that of conventional examples and the distance is made longer. CONSTITUTION:The first fluid passage 28 is formed with a groove 15, a step section 21, and an impeller 10, and the second fluid passage 28' is formed with a groove 25, a step section 21', and the impeller 10 by combining the impeller 10 with a suction side case 13 and a partition case 18 with a discharge side case 23. The finishing end of the first fluid passage 28 is connected to the starting end of the second fluid passage 28' through a gap 20 provided on the partition case 18, and the length is made long. Then, when the impeller 10 revolves, as the fluid flows through the first fluid passage 28 its pressure is increased, and as it flows through the second fluid passage 28' its pressure is further increased until it goes out through a discharge port 27. Accordingly, a high pressure can be obtained with a flow quantity smaller than conventional examples without deteriorating the efficiency.