Determination of wear that can be formed at the cast iron wheels of the centrifuge pumps used at agricultural irrigation

Abstract

T.Öz Yok

The extent of this work is operating characteristics of a horizontal shafted centrifugal pump (which has cast iron with lameller graphite wheel) which has been operated for 7 hours on the average. A closed circuit pump system (circulating within itself) which was formed by attaching a horizontal shafted centrifugal pump which can be used in irrigation applications with a drum has been operated for 150 hours at laboratory conditions. To define the operating properties of the pump, its operating characteristics were measured in respect to TS EN ISO 9906/AC. Furthermore, observations have been done to determine whether there is a connection between operating characteristics of the pump and the wear and corrosion occured on the wheel or not. When spectral analysis, micro-structure and hardness measurements of the wheel materials on which first and second experiments were conducted and unused wrought iron wheel materials were analysed, it has been observed that the wheel materials used in the experiments do not bear the properties required by wrought iron standards. According to the results of the observations carried out by electron microscope on micro-structure of wheels, wear, in addition to corrosion on the outer surface of wheels has been identified.