Experimental Study on the Improvement of Performances of “Sliding-vane Rotating Pump”

Abstract

In regard th promoting the faculty of “Sliling-vane rotating pump” with impeller made of synthetic rubber, some experiments were conducted and the following results were obtained.
1) The best result was obtained as shown in fig. 2 by use of cam 4/3 compared with other size of cam in fig. 1.
2) Shaft horse power of pump increased with the decrease of side-clearance between impeller and side-wall.
The value of side-clearance of 0-0.3mm is recommened due to the result of fig. 3 (1).
3) The time lag of water flow at the delivery of pump immediately after switched in, prolonged with the increase of side-clearance.
Allowable value of side-clearance was expressed on this point of vien.
4) The influences of the degree of blockage of strainer upon the perforance of pump were expressed in fig. 6.
5) The remarkable abrasion of parts and fall of efficiency did not occur after the running test of 100 to 200 hours. (cf. fig. 7. 8)
6) The occurrence of foaming inside of casing was observed by using Stroboscope method.