What is a pump?
Basically, A pump is a mechanical element used to pressurize and circulate fluid.
It is characterized by its flow rate, cubic capacity, outlet pressure, efficiency.
Hydraulic pumps transform mechanical energy (torque, rotational speed) from an engine in general into hydraulic energy (flow, pressure).
Definition of a Hydraulic Pump
To put it simply, it is a mechanical part allowing the circulation of a fluid (generally oil) under pressure. Thanks to a motor, the pump transforms the so-called mechanical energy (torque and speed of rotation) into hydraulic energy (flow and anxiety).
This pressure is often above 50 bar, and the standard is 210 bar for gear pumps. Depending on the need, this pressure varies upwards, up to 10,000 bar for the pressure multipliers. To give you a little idea, let’s say that 1 bar is equal to 1kg per cm2, the pressure inside is 10 tons per cm2 or the equivalent of 2 male African elephants. On this scale, the slightest error can be fatal.
As an aside, if you don’t know, a gear pump works with two cogwheels to generate the flow of the fluid used. It is the most widespread in our industry because the design is simple and the cost price is low.
Difference between a hydraulic pump and an oil-hydraulic pump?
The most common mistake is to confuse these two types of pumps. The first is literally to circulate the water, while the second is to pass oil under pressure.
How? ‘Or’ What? By transforming the pneumatic energy created by compressed air (often expressed in the bar) into mechanical energy.
We commonly speak of a hydraulic pump in our industry, but the real name is the OLEOhydraulic pump.
Although both suck a liquid, it is the very nature of it that sets them apart.
How does a hydraulic pump work?
Nothing very complicated. It is used to supply various machines operating with hydraulic oil. It can be found on agricultural machinery, industrial machinery, public works machinery, etc.
Concretely, it is started thanks to the power of a motive source and sucks the oil directly from a hydraulic tank and pushes it in a circuit of the hydraulic unit in the form of flow.
The principle of the pumps used in industrial hydraulics is the volumetric type, that is to say, a variation in volume between the suction and the discharge. The oil is forced to flow towards the outlet of the pump to feed, for example, a cylinder.
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