We know that most hydraulic applications use hydraulic pumps to convert mechanical energy into hydraulic energy. Both mobile and industrial hydraulic machines use hydraulic pumps. Forestry equipment, construction equipment, mining machinery, excavators, dump trucks, cranes, graders, loaders, dump trucks, tractors, etc. Use hydraulic pumps to maximize performance. Hydraulic pumps play an essential role in maintaining the accuracy and efficiency of the entire system.
Plastics, synthetic rubber and steel alloys are used as manufacturing materials. Materials are selected based on the temperature and pressure exposed to these pumps. Titanium alloys and polymers are high strength materials used for high pressure applications. The fire-resistant and corrosion-free properties of the hydraulic system paved the way for continued growth in the industry.
In the previous article “Hydraulic Pumps: The Ultimate Guide for Beginners”, we have discussed all the essential details like introduction, working principle of hydraulic pumps, selection criteria, difference between hydraulic pumps and motors, etc. In this article, you can find out the details. On the types of hydraulic pumps and their principle of operation.
Operation of the hydraulic pump
The principle of operation of all pumps is the same. They work on the principle of displacement. We discussed in the previous article that the vacuum created at the pump inlet will drive atmospheric pressure into the pump inlet. This liquid is then conveyed to the outlet of the pump by using mechanical energy.
The hydraulic pump has two check valves, one at the inlet and the other at the outlet. The first check valve only allows fluid to enter through it, while the second allows fluid to drain through.
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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