The development of hydraulic driven reciprocating pumps in China

China started relatively late in the development of hydraulic driven reciprocating pumps, but has also done a lot of work and produced several different types of hydraulic driven reciprocating pumps. Beihang University has conducted a detailed study on hydraulic driven reciprocating pumps and developed a system called“ Low frequency large amplitude automatic reciprocating hydraulic mud pump; The working principle is that its oil cylinder is connected to the mud piston, and the mud piston is directly driven by the hydraulic piston rod, so that the pressure energy output by the hydraulic pump is directly converted into high-pressure energy of the mud. This type of mud pump has a short transmission chain and high working efficiency; The movement direction of hydraulic piston and mud piston is consistent, and they move back and forth along the same axis, which can reduce power loss to a low value; The mud output is approximately equal to the flow rate output, which is relatively good; By using a hydraulic variable displacement pump, it is easy to achieve stepless speed regulation; The hydraulic system has an overflow function, which further simplifies the structure of the device; The volume and weight of the pump are reduced, resulting in high economic benefits.