Determination of the power of a hydraulic-driven single-piston mortar pump with a combined compensator of increased volume

Abstract

The analysis of modern pumps indicates the search for ways to improve and simplify their designs in order to ensure high levels of technical indicators: mechanical efficiency, volumetric efficiency of the supply level, as well as a low level of pressure and supply pulsations, reduced energy consumption indicators depending on the design parameters of their reliability during the transportation of building solutions.

Therefore, the main directions of development of new designs of mortar pumps have been determined and a new design of a single-piston mortar pump with a combined compensator of increased volume has been proposed. The use of a hydraulic drive in a mortar pump is relevant and has a number of advantages over an electromechanical one. The advantages of using a hydraulic drive are: a constant speed of the working body, which will positively affect the reduction of return losses through the suction and discharge valves by stabilizing their speed of lifting and lowering, especially when pumping mortars of reduced mobility P 7-9 cm; a constant speed of movement of the mortar in the hydraulic part of the pump during feeding will minimize the level of pulsations of the mortar pressure; it is possible to ensure smooth regulation of the mortar supply during the operation of the mortar pump, which will contribute to the quality of finishing works; the use of the mortar pump in combination with hydraulically driven plastering stations or kits. These advantages will significantly increase the technical and economic indicators of using a hydraulic drive in mortar pumps both separately and as part of plastering units.

The presented work considers theoretical studies of energy consumption of single-piston mortar pumps with electromechanical and hydraulic drives. A comparative analysis of costs depending on the law of motion of the working body, the influence of the compensating device on the stabilization of the degree of pressure pulsations and types of mortar pump drives, as well as the influence of hydrodynamic pressure based on the Bernoulli law, is carried out.

The mechanisms of influence of hydrodynamic pressure in the hydraulic part of the mortar pump, which directly affect energy consumption, are established.

Key words: single-piston mortar pump with a combined compensator of increased volume, hydraulic drive, electromechanical drive, suction chamber, suction and discharge valves, volumetric efficiency, degree of pressure pulsations, mortar mobility.