Pulse pump with adjustable stroke frequency and pressure

Abstract

The invention discloses a pulse pump with adjustable stroke frequency and pressure. The pulse pump comprises an explosion-proof motor, a gearbox and a double-plunger pulse pump body which are installed on a base, wherein the explosion-proof motor is connected to an input shaft of the gearbox through a first coupler, and an output shaft of the gearbox is connected to a crankshaft assembly at the power end of the double-plunger pulse pump body through a second coupler. The pulse pump is simple in structure and adjustable in the stroke frequency and pressure, under the rated rotating speed of the motor, the gearbox is controlled to be switched to different gears through a speed changing control rod, then the output shaft is adjusted to output different rotating speeds, the crankshaft is driven to rotate at different rotating speeds, the pulse pump completes one stroke frequency after the crankshaft rotates by one circle, the final stroke frequency and flow of the pulse pump are different, as the rated power of the motor is not changed and the flow is changed, the maximum rated pumping pressure corresponding to the pulse pump at different gears is different, during hydraulic fracturing, different gears can be selected for switching corresponding to rocks with different properties and hardness, different times of stroke and pressure can be adjusted, and the use effect is better.

Description

technical field [0001] The invention relates to a pulse pump, in particular to a pulse pump with adjustable stroke frequency and pressure. Background technique [0002] Pulse pump is one of the key equipment in hydraulic fracturing engineering application. The pulse pump pumps water into the coal and rock mass in the form of high-pressure pulsed water jets, and uses periodic fluctuations in water pressure to cause fatigue damage to the coal and rock mass, reduce its strength, expand the original cracks and pores in the coal and rock mass, and generate new ones. cracks, so as to achieve the effect of weakening the coal rock mass. But the rated pressure of the commonly used pulse pumps for mining is low, and the cracking effect on hard rock masses is not good, and the maximum pressure of the pulse pumps cannot be adjusted, so the applicability to different rock masses is low. [0003] Therefore, it is of great significance to design a pulse pump that can adjust the maximum p...

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