Plunger pump It is because the plunger cylinder is inclined at an angle relative to the drive shaft to make the plunger move back and forth. Flow adjustment is realized by the angle of the swing plunger cylinder, so some are also called swing cylinder. Compared with the swash plate type, it works reliably, has a large flow, but has a complicated structure. Compared with the radial piston pump, the axial piston pump has a higher discharge pressure. It can generally work in the range of 20-50MPa, with high efficiency, small radial size, compact structure, small volume and light weight. However, the structure is more complex than the radial piston pump, the processing and manufacturing requirements are high, and the price is more expensive.
The vane pumps are all horizontal centrifugal pumps with a single pump casing structure. The pump body and pump cover are clamped by special clamps, and the outlet direction of the pump can be in any position of 360 degrees, which is easy to install and use. The bearing assembly of the sand pump adopts a cylindrical structure, which is convenient to adjust the gap between the impeller and the pump body, and can be removed as a whole during maintenance. The bearings are lubricated with grease. The shaft seal of the sand pump includes packing seal, impeller seal and mechanical seal. The sand pump has a wide flow channel, good cavitation performance, high efficiency and abrasion resistance
The gear pump adopts the principle of internal gear meshing. The pitch circle of the internal and external gears is close to one side, and the other side is separated by the "crescent plate" on the pump cover. The driving internal gear on the main shaft drives the external gear to rotate in the same direction. At the inlet, the gears are separated from each other to form a negative pressure to suck in liquid, and the gears are continuously embedded and meshed at the outlet to squeeze out the liquid. Because of this unique structure, it is especially suitable for conveying medium with high viscosity. The viscosity range is: 0.2-1000000cp and can be conveyed in reverse, as long as the steering of the motor is replaced; Rexroth internal meshing pump body can be steered, and the inlet and outlet positions are at right angles, which is convenient Optional inlet and outlet positions; Rexroth gear pumps have convenient connections for heat preservation or cooling medium inlet and outlet ports between the pump body, end cover and bearing seat. REXROTH meshing has the advantages of no oil trapping, smooth transportation, high efficiency, low noise and long service life. Internal gear pumps are suitable for transporting Newtonian or non-Newtonian liquids in the petroleum, chemical, paint, dye, food, grease, pharmaceutical and other industries. The type of liquid to be transported can be light, volatile, to heavy and viscous. Even semi-solid liquids.
Hydraulic pump application:
Axial piston pumps are generally used in hydraulic transmission systems of machine tools, metallurgy, forging, mining and hoisting machinery, and are especially widely used in high-power hydraulic transmission systems. Vane pumps are generally used in mining, coal, metallurgy, chemical, environmental protection and other industries. Generally speaking, sand pumps are used in environmental protection, sand dredging, river dredging and other industries. This series of sand pumps are mainly ES or G series. In addition, there are many types called sand pumps, SB sand pumps in the petroleum field, PS sand pump series in the mining industry, and so on. The sand pumps introduced in this article are mainly ES or G series sand pumps used in the environmental protection industry. REXROTH gear pumps are suitable for transporting Newtonian or non-Newtonian liquids in the petroleum, chemical, paint, dye, food, oil, and pharmaceutical industries. The types of transported liquids can range from light, volatile liquids to heavy, viscous, and even Semi-solid liquid.