ANALYSIS OF ANALYTICAL MODELS OF VIBRATION DRIVE OF THE MACHINE FOR WASHING AND CLEANING BY PULSATING STREAM OF LIQUID AND EXPERIMENTAL RESEARCH OPERATING MODES

Abstract

Two analytical models are proposed to describe the operation of the working body of the vibrating machine – a pulsation chamber with a nozzle to create a pulsating jet of liquid. The analysis of analytical models which describe change of parameters of a pulsating stream in a nozzle of a working body of the vibrating car for washing and cleaning of parameters of work of its drive and constructive dependences is carried out. The main factor in the process of washing and cleaning of contaminants is the speed of the jet or its maximum pressure when interacting with the contamination and the friction force of the flow when spreading on the surface to be cleaned. Experimental studies of the influence of the frequency of oscillations of the drive on the change of the maximum pressure of the pulsating jet at the nozzle section at certain design parameters using a sensor with recording equipment. As a result of experimental studies, it was found that the use of a diaphragm check valve, which connects the pulsation chamber with the bath for washing and cleaning, allows to increase the maximum pressure of the immersed pulsating fluid jet by reducing the volume of cavitation bubbles in the pulsation chamber liquid. This in turn allows you to increase the maximum pressure of the liquid jet from the nozzle. From the analysis of the results obtained from analytical models and experimentally presented on the comparative graph, the adjustment coefficients of analytical models are established, which were built with certain assumptions and complexity. The result of the experimental research is the recommendations for choosing the frequency range of the machine drive, which is from 14 to 16 Hz with a pulsation chamber diameter of 0.1 m, a nozzle diameter of 0.01 m and amplitude of oscillations of the drive of 0.002 m.