Investigation of Energy Consumption in the Course of Plastering Machine's Work

The study focuses on the operating principle of the hydraulic technological equipment set for finishing works. The main objective of the study is to determine the amount of energy consumed in the process of the set operation. This energy is spent on mixing the finishing mortar and on the work output of the mortar pump piston when it is acting on the mortar to create the required feed pressure in the pressure main. We consider a scheme of energy consumption of the operating equipment set and propose a method of calculating the specific energy consumption of the selected set components. The method consists in calculating the energy consumption of each component and the total energy input, which allows determining the required capacity of the power unit.The research findings allow calculating the energy input in the process of operation and, thereby, estimating the energy balance of such unit. They can be used by design engineers to further improve the performance of the designed machines in terms of their rational energy consumption.The proposed method allows analyzing the share of energy consumption of each element of the hydraulic equipment set and outlining steps to further improve the parameters of the hydraulic circuit

Study of the Operating Element Motion Law for a Hydraulic-driven Diaphragm Mortar Pump

A mathematical model of the process of operation of a hydraulic diaphragm mortar pump has been developed. It is aimed to describe the processes occurring during automatic reciprocating motion of the hydraulic cylinder piston under the action of high-pressure oil. Oil flows are formed using a hydraulic distributor. Eight phases of the solution pump cycle were identified.The use of a hydraulic drive in this mortar pump allows one to get rid of the main drawback inherent in mortar pumps with a reciprocating drive mechanism. This drawback consists in the sinusoidal law of the piston velocity variation. As a result, there is a significant pulsation of the mortar supply pressure. Uniformity of velocity of the hydraulic cylinder during the working cycle helps reduce the level of pulsations and improve technical, economic and operational characteristics of the mortar pump.Knowledge of the mathematical model of the hydraulic cylinder provides for a better understanding of operational parameters such as:– sucking capacity of the mortar pump;– the nature of response of the valves for opening and closing;– the mechanism of formation of reverse mortar leaks at the closure of valves;– the mechanism of formation of the level of volumetric efficiency of the mortar pump;– the degree of uniformity of pulsations in the mortar supply pressure.The results obtained from the theoretical relationships were confirmed experimentally