ASPECTS REGARDING THE FRICTION PROCESS OF THE OPERATING PARTS OF A DRAWER TYPE PULSATOR OF OWN CONCEPTION

C-tin Chirilă, R. Roşca

Abstract
   The paper presents the results of tests performed in order to evaluate the friction coefficient of the sliding operating parts for a drawer-type, electromagnetic pulsator, own conception. The evaluation of the friction coefficients allows the proper sizing of the electromagnetic pulsator coils. The tests were performed on two drawer-type operating parts, built from different materials. During the tests the pressure was set at a level of 0.05 MPa. Calculation of the normal force over the slider and measurement of the friction force allowed the evaluation of the real the value of the sliding friction coefficient. The tests led to the conclusion that the lower values of the friction coefficient were recorded by the operating parts containing bronze plates and Teflon sliders.

Key words: milking equipments; pulsators