Reciprocating high-pressure plunger pump

Abstract

The invention belongs to the technical field of reciprocating pumps, and discloses a reciprocating high-pressure plunger pump. The reciprocating high-pressure plunger pump comprises a pump body, a driving piston, a boosting piston and a valve core; the driving piston divides a driving cavity of the pump body into a first control cavity and a second control cavity; one end of the boosting piston isconnected with the driving piston, and the other end of the boosting piston extends to a boosting cavity for medium introduction and compression output; the interior of the driving piston is providedwith a valve hole, and the valve core is located in the valve hole and can reciprocate; and the driving piston is provided with four oil passages which communicate with the first control cavity, thesecond control cavity, a P port and a T port respectively, and the reciprocating motion of the valve core can control the connection relationship between the four oil passages to switch the communication relationship of the first and second control cavities and the P and T ports to form automatic reversing of the driving piston. The reciprocating high-pressure plunger pump is simple in mechanicalstructure, small in size and low in cost, and the driving piston can be automatically reversed to achieve automatic continuous reciprocating motion.

Description

technical field [0001] The invention belongs to the technical field of reciprocating pumps, in particular to a reciprocating high-pressure plunger pump. Background technique [0002] In the field of application of reciprocating pumps, the most widely used is the three-cylinder single-acting piston reciprocating pump. Driven by a power source, the three pistons of the reciprocating pump reciprocate left and right in different phases. The three-cylinder single-acting reciprocating pump with this structure mostly adopts the motion principle of the crankshaft and connecting rod, and cannot be driven by hydraulic pressure, let alone automatically reversing. This not only has a complex mechanical structure and a large volume, but also has low mechanical efficiency and easy moving parts. High wear and maintenance costs. [0003] At present, although there are hydraulically driven reciprocating plunger pumps on the market, the diameters of the piston and plunger in the reciprocatin...

AI Technical Summary

Problems solved by technology

The three-cylinder single-acting reciprocating pump of this structure mostly adopts the motion principle of the crankshaft connecting rod, and cannot be driven by hydraulic pressure, let alone automatically reversing. This not only has a complex mechanical structure and a large volume, but also has low mechanical efficiency and easy moving parts. Wear and tear, high maintenance costs

[0003] At present, although there are hydraulically driven reciprocating plunger pumps on the market, the diameters of the piston and plunger in the reciprocating plunger pump are fixed, so the boosting ratio is fixed.

However, in actual application conditions, most of the requirements are low pressure, large flow, high pressure, small flow, that is, the boost ratio is small when the pressure is low, and the boost ratio is large when the pressure is high, which leads to the existing Hydraulically driven reciprocating piston pumps offer poor flexibility of use

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