Hydraulic pumps are an important component of most hydraulic systems, which convert the energy generated by pressurized fluids into usable mechanical energy. The hydraulic systems they support exist in a range of industries, among them agriculture, automotive manufacturing, defense contracting, excavation, and industrial manufacturing.
They operate under the principle of Pascal’s Law, which states the increase in pressure at one point of an enclosed liquid in equilibrium is equally transferred to all other points of said liquid.
All hydraulic pumps are composed in the same basic way. First, they have a reservoir, which is the section of the pump that houses stationary fluid. Next, they use hoses or tubes to transfer this fluid into the cylinder, which is the main body of the hydraulic system. Inside the cylinder, or cylinders, are found two valves and one or more pistons or gear systems. One valve is located at each end; they are called the intake check, or inlet, valve and the discharge check, or outlet, valve, respectively.
When pressurized fluid is pumped into the cylinder through the inlet, it picks up more force, which it carries over into the hydraulic system when it is released through the outlet. The role of the piston is to move or compress fluid. When the piston is withdrawn, the check valve is opened, creating a vacuum that pulls in hydraulic fluid from the reservoir.
When it is set back in its original position, the check valve closes and fluid pressure builds. The piston forces the valves open and closed repeatedly at variable speeds, increasing pressure in the cylinder until it builds up enough to force the fluid through the discharge valve. In this way, the pump delivers sufficient force and energy to the attached equipment or machinery to move the target load. Read More…
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Hydraulic Pump Informational Video