Everything you need to know about hydraulic cylinders!

Cylinders are the hydraulic actuators within our hydraulic system. Being the component that will move, open or raise the load of our machinery or mechanism.

With the cylinders, we can move different types of load with different weights and sizes, finding a maximum speed , due to the friction rates of its components. Standard maximum speed 5 mts / min.

We can achieve speeds above this, but playing with special friction materials prepared for the required speed.

Cylinder Types

Single Acting Cylinder

These types of cylinders are physically identified because they only have a hydraulic connection. We can only hydraulically actuate a movement in one direction. To return it to its original position, instead of a hydraulic system, we will use a mechanical drive or the most common, it returns to its original position due to the weight of the load and gravity.

For long rod lengths, it is advisable to mount double-acting cylinders, since it provides us with greater control of the collection and control of cylinder buckling.

Double Acting Cylinder

On the other hand, unlike single-acting cylinders, double-acting cylinders have 2 hydraulic connections with which we can easily identify the cylinders. With this type of cylinder we can generate movement in both directions. Remove the piston and contract the piston from the cylinder.

In other articles on our blog, we will talk about how to calculate which cylinder to mount and practical cases of cylinder calculation.

Telescopic Cylinder

These types of cylinders can be single-acting or double-acting indistinctly. The stem is fragmented into several sections of different thickness so that when the cylinder contracts they are introduced into each other.

In this way the space required to locate the contracted cylinder is less than a standard cylinder. These telescopic cylinders are usually found on cranes and dump trucks.

Hydraulic Cylinder Symbols

In the different hydraulic diagrams and catalogues we can find the symbols that represent these hydraulic cylinders.

The UNE-101 149 86 Standard (ISO 1219 1 and ISO 1219 2) is responsible for representing the symbols that we can use in hydraulic and pneumatic diagrams.

How to identify the size of a cylinder

When it comes to identifying a cylinder, it is good that we know how to differentiate Simple Effect, Double Effect and when they are Telescopic. But we must take into account several measurements to know the size of it.

Adaptation and design of a Cylinder

In the case of first cylinder installations, complex calculations will be necessary to avoid accidents and for the cylinder to be able to carry out its work without problems or excesses. But don’t worry, our technical office professionals will be able to mathematically calculate which cylinder you need. They will only ask for some information such as the displacement of the load, the weight of the load, the angle of inclination in case it is not vertical or horizontal, etc.

Replacing a Cylinder

If what you need is to replace an old cylinder with a new one it will be much easier, take your old cylinder. Just measure the stem (dimension N in the image), the outer sleeve (dimension C in the image) and the center-to-center distance (dimension E in the image) and pass those data on to our sales professionals to receive a budget on the go.

To find out more information visit the Hynesur website today!

Source: Hynesur

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Matthew Seaman

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