Schematic diagrams and characteristics of valveless pumps with the displacer of reciprocating movement

Schematic diagrams of volume pumps with a displacer of reciprocating movement are considered. It is shown that piston pumps with valves distribution, as a rule, are low-speed and have rather low reliability. Two main directions of expansion the functionality of piston pumps - use of hydraulic diodes and use of wave and inertial effects at the movement of the pumped-over fluid in flowing part of the hydraulic machine are revealed. It is shown that the existing pumps of both directions have rather low efficiency. For increase of efficiency of valveless hydraulic machines with a displacer of reciprocating movement the schematic diagram of the hybrid pump based on the principle of work of impedance pump and which is turning on hydraulic diodes as units of distribution is offered. The analysis of the offered scheme is made and the key parameters influencing working process are revealed. The settlement power characteristics of the hydraulic machine expressing dependence of flow rate and efficiency from pressure are submitted.