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A Quick Look at the Structure of Hydraulic Cylinders

By Nishaidhijames Subscribe to RSS | July 4th 2012 | Views:

Hydraulic cylinders are simple, sturdy and useful devices that are little beyond a piece of simple iron tube with bits and pieces of steel holding the whole structure together. Needless to point out, these devices our true workhorses of our world, offering the essential muscle that forms and moves the structures and earth around us. Having said that, would not it be amazing to take a look at how these devices work?

In explaining the work structure of the hydraulic cylinders, we will stick to the old principle. The amount of pressure that is exerted on things increases rapidly in force as the area occupied by the object expands. For example, if you decide to put one pound of pressure on, say, an object measuring an inch, what you get in result is one pound of pressure.

Going by this principle, it appears that larger the piston of the cylinder, more pushing or lifting it can do.

Piston refers to the part that resides inside the hydraulic cylinder. It is that part against which the fluid pushes constantly. The piston’s diameter is called BORE. It would be worthwhile to know that larger bore hydraulic cylinders have tremendous force exerted upon them. This is the main reason why such varieties increases have higher lifting capacity. It is the piston seal which contains hydraulic fluid. This is why cylinders with faulty or defective piston seals will not lift to the desired height or position. Even when the cylinder is not really leaking on the outside per se, a faulty piston will essentially allow oil to bypass the piston. This ensures that pressure will never be able to reach the requisite level to perform the lifting.

The shaft or rod is the most essential part of hydraulic cylinders that tours through the head or gland of the device and gets the piston attached to the clevis or other end fittings. There are several more nuances pertaining to the operation of hydraulic cylinders. Like their operations, the devices too vary widely in variety. And talking of variety, Parker hydraulic cylinder is a major example.

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