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Load Sensing pump: operation and use

Whether you're a lover of hydraulic pumps of all kinds or a future professional, it can be useful to sort the wheat from the chaff when it comes to hydraulic pumps. How do load-sensing pumps, and hydraulic pumps in general, work? How do they fit into our engines? This is the place to find out!

Before we get to the heart of the matter, let's take a look at hydraulic motors.

The function of a hydraulic motor is to generate mechanical energy using hydraulic power. It is the transformation of hydraulic power into mechanical power that creates the conditions for its operation.

The action of generating power in this way uses fluid pressure. To do this, the motor does not work alone, so to speak. It is the combination of pumps, valves and other reservoirs that enable these fluids to be pressurised. These fluids are then channelled towards the engine to produce mechanical energy and keep it running.

The release of this energy enables a great deal of force to be deployed, which explains why these engines are used in industrial or agricultural settings, for example.

Now, let's move on to the role of the pumps in our hydraulic motor/hydraulic pumps combination. Where do they fit in?

Hydraulic pumps

Together with the motor, the hydraulic pump is responsible for the operation of our hydraulic installation. But how does it work?

The interest and role of a hydraulic pump begins when it is linked to a motor of the same type.

The pump is energised when the motor is activated, starting the action that forces hydraulic fluid into and out of the pump.

The parts of the hydraulic pump generally keep the fluid moving in the right direction, but the whole process can be reversed. This reversal of the action and direction of the fluid is specific to the hydraulic system as a whole, and therefore to both the motor and the pump.

A hydraulic pump, whatever its type and function, has several essential components to ensure that it works properly:

  • Pistons
  • Lobes
  • Vanes
  • Gears

As you can see, the hydraulic pump does not generate force by itself, but by moving the fluid towards the inlet and outlet.

There are several models, including our famous Load Sensing pump. Let's take a closer look!

The Load Sensing pump

After this long introduction, let's take a closer look at the Load Sensing pump.

Unlike other pumps, this one adjusts itself automatically in terms of displacement and pressure, to ensure constant distribution.

The automatic adjustment means that the inlet and outlet of the variable-area distributor and the receivers will be perfectly calibrated from the outset, enabling an immediate response to demand.

What's more, the fact that the calibration is already impeccable means that there will be no break in the distribution and therefore a constant and stable supply to our installation.

Pressures will always be stable and distribution guaranteed.

It should be noted that the distribution system is also protected by an override function that allows maximum pressure to be maintained, so that if the outlet pipe needs to be interrupted, it can be done immediately. And, in effect, stopping the process.

This permanent adequacy also saves a great deal of energy, since the motor does not have to work harder to supply our installation. Stability means more power and less energy, so it's a winning combination.

You now know not only how a hydraulic pump works overall, but also the more specific case of a Load Sensing pump. See you soon for more hydraulic discoveries!

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