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How do hydraulic pumps work?
We can consider Rexroth hydraulic pump as a heart of any hydraulic system used. Every hydraulic system requires high-pressure incompressible fluids for generating force. A hydraulic pump plays an important role in converting the mechanical energy to hydraulic energy.You can find different varieties of pumps in the market. It will differ depending on the size, shape, and method of operation. A pump can be operated either manually or mechanically. Hydrodynamic (non-positive displacement) and hydrostatic (positive displacement) are the two classifications of the hydraulic pump.
Hydraulic pumps are used for low-pressure high-volume applications. These pumps will force the low-pressure fluid to flow at a higher speed and result in the flow of high-volume fluid in minimum time. How hydraulic pump works? You can learn the basic details on the working principle of hydraulic pumps from this article.
In hydrodynamic pumps, the fluid weight and the friction are the resistance encountered and the pump operate using centrifugal force. The rotating impeller blades of hydrodynamic pumps will throw the fluid entering at the center of the pump housing to the outlet. They are used for creating a smooth continuous flow, but the resistance encountered will inversely affect the performance.
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Construction of Rexroth Hydraulic Pump
Hydraulic pumps are used for energizing fluids to flow from a lower potential to higher. It has several mechanical moving components that receive energy from any other source (mainly electrical). Most of the hydraulic pumps have rotating parts that operate using the electrical source.The basic components used in hydraulic pumps are: Pump Housing/Casing: This is the exterior part of the hydraulic pump to protect the inner components. Smaller pumps use aluminum as the construction material and others use cast iron.
When the piston is pulled, a vacuum is created inside the cylinder. The resulting vacuum will close the outlet check valve and atmospheric pressure will force the liquid through the inlet valve. When the cylinder is partially filled, the piston will be pushed and the liquid molecules will move closer together. This will close the inlet valve and open the outlet valve. The fluid will flow into the hydraulic system through it.
Source: Rexroth Hydraulic Pump
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