Studies on Centrifugal Distributor (I)

Performance of Distribution and Torque

Abstract

The distribution pattern of a centrifugal ditributor was measured. The test results were compared with the theoretical calculation. The main results were the followings;
(1) The test results in the field showed that the uniformity of the distribution was good. The effective width was, however, much smaller than the distribution limits (or the maximum width).
(2) Assuming that the air resistance was acting only in the horizontal direction, the distribution limit was calculated. The calculated values showed good agreement with the test results.
(3) The stationary distribution test proved to be very effective for broadcasiting tests of fine particles. This test method was very efficient and accurate.
(4) The compaction of lime due to vibration resulted in a rapid increase of torque. A series of tests led to an empirical equation.
(5) Eight factors which composed total torque were analysed. From a set of tests on various combination of these factors, a system of linear equations was obtained, which gave the values of the torque factors.
(6) Based on the calculation of the particle pressure in the hopper, the agitator torque and the spinner torque due to the shearing and friction of lime were calculated. The calculated values agreed fairly well with the test results