Bilateral permanent magnet linear motor driven type plunger pump

Abstract

The invention discloses a bilateral permanent magnet linear motor driven type plunger pump. The bilateral permanent magnet linear motor driven type plunger pump comprises a bilateral permanent magnetlinear motor, connecting rods and four plunger pump bodies. The bilateral permanent magnet linear motor comprises a stator, a first mover and a second mover, wherein the stator comprises a stator ironcore, a first armature winding and a second armature winding, and the first armature winding and the second armature winding are symmetrically distributed in stator slots in both sides of the statoriron core. The first mover includes a mover iron core and permanent magnets, the permanent magnets are located on the mover iron core, and the first mover and the second mover have the same structure.Plungers of the plunger pump bodies are separately connected to the two ends of the first mover and the second mover through the connecting rods, and the four plunger pump bodies have the same structure. The linear motor is adopted to directly drive the plunger pump bodies, mechanical structures such as a crankshaft connecting rod and a reduction gear box are omitted, so that the overall operation reliability and efficiency are improved, and noise is reduced.

Description

technical field [0001] The invention belongs to the field of pumps, and more specifically relates to a double-sided permanent magnet linear motor-driven plunger pump. Background technique [0002] With the rapid development of today's society, human needs for energy are increasing. However, the reserves of fossil energy such as coal, oil, and natural gas are gradually being exhausted. As a new type of energy, shale gas has a large resource reserve and can be used by human beings for a long time. Hydraulic fracturing technology plays a vital role in the exploitation of shale gas. This technology mainly uses high-pressure fracturing pumps to inject high-pressure fracturing fluid into the well, causing cracks in the rock, so that the gas can enter the well more smoothly. This speeds up the development process. The fracturing pump is the core of the whole fracturing work, how to improve the performance of the fracturing pump is worthy of further study. [0003] Currently, the...

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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a double-sided permanent magnet linear motor-driven plunger pump, thereby solving the problem of uneven output flow, large pressure fluctuations, and problems caused by existing fracturing plunger pumps. A series of problems such as poor reliability, low efficiency and high noise caused by mechanical structures such as crankshaft connecting rods and reduction gearboxes can also solve the problems of excessive volume, heavy weight and material utilization of the system caused by the use of multiple linear motors. low rate problem

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