Views: 1 Author: Site Editor Publish Time: 2020-10-19 Origin: Site
What are the common structures and application fields of hydraulic pumps? Today, we will tell you about the structure of hydraulic pumps and the application fields of hydraulic pumps, so that everyone can learn more about hydraulic pumps.
Plunger pump Because the plunger cylinder is inclined at an angle relative to the drive shaft, the plunger reciprocates. Flow adjustment depends on the angle of the swinging plunger cylinder, so some are also called swing cylinder type. Compared with the swash plate type, it works reliably, has a large flow, but has a complicated structure. Compared with radial plunger pumps, axial plunger pumps have higher discharge pressures, and they can generally work in the range of 20-50 MPa, with high efficiency, small radial size, compact structure, small size, and light weight.
However, the structure is more complicated than that of a radial piston pump, the processing and manufacturing requirements are high, and the price is relatively expensive. REXROTH vane pumps are horizontal, single-pump centrifugal pumps. The special clamp is used to clamp the pump body and the pump cover, and the pump outlet direction can be at any position of 360 degrees, which is convenient to install and use. The bearing assembly of the sand pump adopts a cylindrical structure, which is convenient for adjusting the gap between the impeller and the pump body, and can be removed during maintenance. The bearings are lubricated with grease. Shaft seals of sand pumps include packing seals, impeller seals, and mechanical seals. The sand pump has a wide flow channel, good cavitation performance, high efficiency and wear resistance.
The gear pump adopts the principle of gear internal meshing. The internal and external gear pitch circles are close to one side and the other side is separated by a "crescent plate" on the pump cover. The active 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 the liquid. The gear is continuously embedded and meshed at the outlet to squeeze the liquid out. Due to this unique structure, it is especially suitable for conveying medium with high viscosity.
Axial piston pumps are generally used in hydraulic drive systems for machine tools, metallurgy, forging, mining and lifting machinery, and are particularly widely used in high power hydraulic drive systems. REXROTH vane pumps are mainly used in mining, coal, metallurgy, chemical, environmental protection and other industries. Generally speaking, sand pumps are more 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 of sand pumps, such as the SB sand pump in the petroleum field, and the PS sand pump series in the mining industry. The sand pump introduced in this article is mainly used in the general sense of the ES or G series of sand dredging, sand pumps used in environmental protection industry. REXROTH gear pumps are suitable for conveying Newtonian or non-Newtonian liquids in petroleum, chemical, coating, dye, food, oil, pharmaceutical and other industries.