Today, we can safely say that hydraulic cylinders are used in almost any industrial field of activity. They are used on any kind of equipment: tractors, combines, excavators, bulldozers, utility vehicles, forestry equipment, dump trucks - all of them have hydraulic cylinders in their construction. They are also used on machine tools and industrial equipment.
What is a hydraulic cylinder?
- This is a reciprocating hydraulic motor , where the rod, plunger or body of the hydraulic cylinder itself performs the function of a moving unit.
The hydraulic cylinder consists of:
- from sleeve (cylinder body)
- stock
- piston (a part that is usually screwed onto the rod, thereby pushing the working fluid out of the cylinder liner when the rod moves)
- thermowells (eyes, forks, trunnions, etc.)
- rubber products and sealing materials
come in various forms. Here we have listed the most common and sought after of them:
- Single acting hydraulic cylinders
- Double-acting hydraulic cylinders
- Telescopic hydraulic cylinders
So, more details.
A single-acting hydraulic cylinder - in this type of hydraulic cylinders, the extension of the rod is carried out by creating pressure in the cavity of the cylinder liner, and the spring is returned to the initial position of the rod.
Double-acting hydraulic cylinder - everything is the same as in the previous subclause, but there is no spring, all operations are carried out due to the pressure of the working fluid.
Telescopic hydraulic cylinders - they got their name because of their resemblance to a telescope; in fact, this type of hydraulic cylinder represents several cylinders inserted into each other. This combination allows, with the small size of the hydraulic cylinder itself, to perform a large stroke due to its rods. These hydraulic cylinders are widely used on dump trucks and trailers for lifting a body platform. Subdivided into pendulums (ball mount on one side
To date, the most common hydraulic cylinders are - double-acting piston cylinders
In order to make it easier for you to find and buy a hydraulic cylinder that will suit you in all respects , consider the classification of hydraulic cylinders by parameters.
- First you need to determine the diameter of the sleeve (outer and inner in mm)
- The diameter of the rod of the hydraulic cylinder, if it is a telescopic cylinder, then you need to determine the diameter of all its rods (links, plungers)
- Dimmer of eyes or forks for a piston hydraulic cylinder, diameter of balls, trunnions and yokes for a telescopic hydraulic cylinder.
- The distance to the centers of the eyes (axes) of the hydraulic cylinder when folded in mm
- The distance at the centers of the eyes (axes) of the hydraulic cylinder in the unfolded (extended stem or rods in mm)
- Thanks to the deduction of two lengths, it is possible to determine the stroke of the hydraulic cylinder rod.
Knowing these parameters will greatly facilitate your task of finding the required hydraulic cylinder. Also, if you do not find such a hydraulic cylinder, and you need to make it. then you can’t do without this data.
Now we give an example of serial hydraulic cylinders:
- Hydraulic cylinders for excavators: hydraulic cylinders of the handle, bucket, boom, supports, boom rotation
- Tractor hydraulic cylinders: suspension lift cylinders and wheel turning cylinders
- Bulldozer hydraulic cylinders: dozer and link cylinders
- Hydraulic graders
- Loader hydraulic cylinders
- Telescopic hydraulic cylinders for lifting the bodies of KAMAZ, MAZ, ZIL, GAZ, SAZ dump trucks and their trailers.
That's basically all you need to know about hydraulic cylinders.