Piston pump is a fluid transmission equipment widely used in industrial and agricultural production. According to its structure and working principle, plunger pumps can be classified into various types. This article will introduce several common classifications of plunger pumps.1、 According to the structural classification of plunger pumpsAxial piston pump: An axial piston pump is a pump that compresses and discharges liquids in the axial direction. Its working principle is to drive the plunger to reciprocate in the plunger groove through liquid pressure, thereby achieving the suction and discharge of liquid.Radial piston pump: A radial piston pump is a type of pump that moves the plunger radially. Its working principle is to drive the gear, oil pump, and plunger to rotate simultaneously through a motor, forming radial motion in the plunger groove, thereby achieving liquid suction and discharge.Slant plate plunger pump: A slanted plate plunger pump is a type of pump that compresses and discharges liquids through oblique motion. Its working principle is to drive the three components of the inclined plate, plunger, and oil pump to rotate simultaneously through a motor, forming oblique motion on the inclined plate, thereby achieving liquid suction and discharge.2、 Classification based on the purpose of plunger pumpsHydraulic plunger pump: Hydraulic plunger pump is a widely used plunger pump in hydraulic transmission systems. Its main feature is the ability to operate stably under high pressure and generate stable hydraulic power under high pressure.Fuel injection pump: A fuel injection pump is a plunger pump that injects high-pressure fuel into a gasoline engine. Its main feature is the ability to generate high-pressure stable fuel injection, thereby achieving efficient operation of automotive engines.Lubricating oil pump: A lubricating oil pump is a plunger pump that high-pressure sprays lubricating oil into machine equipment. Its main feature is the ability to generate high-pressure stable lubricating oil flow, thereby achieving lubrication and maintenance of machinery and equipment.3、 Classification based on the working mode of plunger pumpsQuantitative plunger pump: A quantitative plunger pump is a type of plunger pump that can stably output liquid according to a set flow rate. Cycloid plunger pump is based on fixed gears, which mesh the polar circle of the cycloid with the circular teeth of the gear, and form a series of variable volume chambers on this basis to achieve the function of transporting liquids. Due to its gear directly driving the movement of the plunger, the cycloidal plunger pump has the characteristics of compact structure, high transmission efficiency, low noise, and good stability, making it widely used in industrial production.The inclined disc plunger pump is also a commonly used type of plunger pump. Its characteristic is that the inclined plate drives the plunger through the cam, achieving the suction and discharge of oil. The main advantages of the inclined disc plunger pump are its simple structure, small starting torque, small volume, and stable pressure, which are widely used in fields such as automobiles and construction machinery.Internal gear type plunger pump is a mechanical device that delivers liquids through a combination of internal gears, plungers, shaft sleeves, and other components. There are generally two ways to combine internal gears and plungers, one is plunger type and the other is rotary type. The characteristics of internal gear piston pumps are compact structure, low noise, and long service life, which are widely used in metallurgy, construction, petrochemicals, and other fields.In summary, as an important hydraulic transmission component, plunger pumps have the advantages of simple structure, long service life, and stable performance, and are widely used in various fields such as metallurgy, construction, petrochemicals, and machinery. When choosing a plunger pump, it is necessary to consider the characteristics and applicability of different types of plunger pumps in order to select the most suitable product to meet specific industrial production needs.