DETERMINATION OF THE DEGREE OF PRESSURE PULSA IN SOLUTION SUPPLY BY SOLUTION PUMPS DEPENDING ON DESIGN FEATURES

The analysis of the operation of existing domestic and foreign samples of piston mortar pumps was carried out, special attention was paid to hydraulically driven mortar pumps. The advantages of using hydraulic drives in mortar pump designs were determined. The materials presented in the publication are part of a scientific and research work in which, based on an extensive study of the operation of a single-piston mortar pump with a combined compensator of increased volume on construction mortars of different mobility, scientific and applied tasks were solved to increase the efficiency of its operation when using a hydraulic drive, creating conditions for stable transportation of solutions through pipelines, which was reflected in the following: – on the basis of a single-piston mortar pump with a combined compensator of increased volume, a hydraulically driven single-piston mortar pump with a combined compensator of increased volume was created; – based on the laws of mechanical engineering hydraulics, rational reduced air volumes in the compensator of increased volume were mathematically substantiated and determined, which will ensure the minimum permissible levels of the degree of pressure pulsations for ensuring effective pumping of construction solutions of different mobility, taking into account the law of motion of the working body, which directly depends on the type of drive; – it was established that the level of the degree of pressure pulsations is affected by return losses through the seats of the suction and discharge valves, therefore, the dependences for determining the return losses through the valves of the mortar pump for the full cycle of its operation depending on the law of motion of the working body were established; – the rational height of the valve ball lift was determined, which will ensure minimal losses of the solution during their operation, which directly affected the reduced level of the degree of pressure pulsations; – based on rational factors, such as the reduced volume of the combined compensator, the average supply pressure, the frequency of double strokes of the working body, the mobility of the solution, the rational height of the valve ball lift was determined, which directly affected the reduced level of the degree of pressure pulsations.