Hydraulic Pump Displacement Calculator
Hydraulic Pump Displacement refers to the amount of liquid transferred from a pump's inlet to its outlet in one cycle or revolution.
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- The pumps mechanical action creates a vacuum at the pump inlet which allows atmospheric pressure to force liquid from the reservoir into the pump.
- The pumps mechanical action forces hydraulic fluid through the outlet forcing it into the hydraulic system.
A hydraulic pump produces liquid movement or the flow necessary to develop pressure, a function of resistance to fluid flow in the system.
Hydraulic Pump Classification
Most pumps used in hydraulic systems are positive-displacement. In a positive-displacement pump, slippage is negligible compared to the pump's volumetric output flow. Its output received the pressure, if the resistance is to great, the pumps hoses or casing will fail. A positive-displacement pump displaces (delivers) the same amount of fluid for each rotating cycle of the pumping element.
A non-positive-displacement pump produces a continuous flow, but does not provide an internal seal against slippage so its output can vary considerably as pressure varies. Centrifugal and propeller pumps are non-positive-displacement pumps.
Other names for positive and non-positive flow pumps are:
- hydrostatic for positive-displacement
- hydrodynamic for non-positive-displacement
Rotary pumps are generally classified according to the type of element that transfers liquid, a gear, lobe, vane, or piston. Rotary motion carries the liquid from the pump inlet to the pump outlet.
Log Splitter Hydraulic Circuit Diagram