Linear motor multi-cylinder reciprocating pump with coupled gear and rack

Abstract

The invention relates to a linear motor reciprocating pump with coupled gear and rack, which mainly consists of a linear motor, a coupler, working hydraulic cylinders, a piston, a piston rod, a gear,a suction valve, a discharge valve, a data collection card, a control computer, a driver, etc. Two cylinders with one coupled gear and rack form an elementary unit; and a multi-cylinder reciprocatingpump with double cylinders, four cylinders and cylinders of even number of more than four can be formed. Two linear motors in one elementary unit can be electrified at respective positive strokes thereof, and can be interrupted at the reverse strokes, and also can be electrified synchronously both at the positive strokes and the reverse strokes. One elementary unit is provided with only one position detection sensor to detect the displacement signal of the motor, and the displacement signal is collected by the data collection card, transferred, and input into the control computer; after the displacement signal is analyzed, a control signal is sent to the driver to lead the motor to realize a desired motion rule. The linear motor reciprocating pump with coupled gear and rack has the advantages of good suction performance, high system efficiency, large discharge capacity, high pump pressure as well as small fluctuation of pump pressure and discharge volume; moreover, the linear motor reciprocating-pump with coupled gear and rack can better fulfill the productive requirements of petroleum, chemical engineering, etc.

Description

technical field [0001] The invention relates to a linear motor multi-cylinder reciprocating pump with rack and pinion coupling used in chemical industry, mining, petroleum and other industries. Background technique [0002] At present, reciprocating pumps are widely used at home and abroad. They are mainly composed of gear transmission, crankshaft, connecting rod and piston. The suction performance is poor, and it is difficult to meet the requirements of modern drilling technology, acid fracturing technology and water injection production technology. In order to achieve low stroke times, large displacement and high pump pressure, the existing reciprocating pump must adopt a larger transmission ratio and a longer stroke, the transmission system is more complicated, the system efficiency is lower, and the structural size of the pump is larger, especially The more cylinders of the reciprocating pump, the more complex the system, the more difficult it is to manufacture, the hig...

AI Technical Summary

Problems solved by technology

In the above-mentioned patents, each linear motor directly drives one or two pistons. During the positive and negative strokes, the motor must be energized. The continuous power-on time of the linear motor is 100%. Fault; when only one piston is driven, the reverse stroke is an empty stroke, and the motor mover runs at a high speed, which is not conducive to the liquid suction of the reciprocating pump

In addition, the thrust of a single linear motor is difficult to meet the high thrust requirements of reciprocating pumps

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