The invention relates to a
linear motor-driven
plunger pump. The mechanical part of the
plunger pump comprises a cylinder body I, a cylinder body II, flow distribution valves, an in-sucking communication
pipe, out-pressing communication pipes, compacting flanges,
plunger rods,
linear motor stators,
linear motor rotors and guide rails; and the electric part mainly consists of linear motors, a controller, drivers and a position feedback device. The linear motor-driven
plunger pump is characterized in that a group of coil-type stators drive a
permanent magnet rotor in a combinational way, thus realizing high thrust output of the linear motors. Each flat-type linear motor drives two plungers at the two ends of one plunger rod, and while the double-action plunger rod reciprocates, one end of the double-action plunger rod sucks water and at the same time the other end of the double-action plunger rod presses water. The two cylinders realizes the effective communication between the water sucking loop and water pressing loop of the
plunger pump by means of the in-sucking communication
pipe and the two out-pressing communication pipes. Each plunger hole is communicated with a flow distribution valve consisting of an in-sucking valve and an out-pressing valve. The electric part controls the out-of-phase movement of the linear motors, thus ensuring the stable combinational flow output of the pump. The linear motor-driven
plunger pump disclosed by the invention has the advantages of less
mechanical transmission links and high
system efficiency and reliability.