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Hydraulic cylinders present an easy approach to applying high force in confined spaces, making them perfect where space, particularly, height is at a premium. Hydraulic cylinders can be found in all kinds of types, from super small to larger designs for immense lifting applications. These hydraulic cylinders are normally used in many industries and are used for aligning equipment, maintenance, rigging, structural weld positioning, construction, mining, railways and steel works, together with oil and gas industries plus many more. To start with let us take a short look at various basic principles of hydraulics; Hydraulic cylinders work by means of creating tremendous quantities of force by means of special hydraulic fluid inside their confined space. Weight applied to any place on confined hydraulic fluid is transmitted in all directions within the fluid and as a result through the use of hydraulic pressure as a medium, a comparatively small force may be changed into a huge force by multiplication. Hydraulic pressure is calculated as a force per unit of area, as an example; bar(=kg/cm²) or PSI (pounds per square inch); The hydraulic pressure is the same at any point throughout the fluid providing the fluid isn't moving. Most high force hydraulic lifting equipment work at a maximum pressure of 700 bar or 10000PSI as standard. If a cylinder is claimed to have a maximum lifting capacity of a number of tonnes, i.e. 10 tonne, then you need to be aware that this maximum capacity is calculated at its maximum working pressure. A manual pump is used to transfer the hydraulic fluid by the use of a hose plus various valves and pumping piston into the cylinder bore, the pump action produces a steady escalating pressure. If a powered pump is used then this replaces the hand levered pump and may be driven by air, electric or a petrol motor. As the hydraulic fluid goes into the cylinders bore, it's going to force the piston upwards, the resistance provided through the load results in amplified fluid pressure, and will continue to increase as the operator continues moving the lever up and down, until it reaches the stroke length or maximum 700 bar pressure. The most commonly used hydraulic cylinders are single acting ones either low height or multi-purpose; and also double acting cylinders, some obtainable with hollow pistons. Single acting cylinders can be found in very low headroom type's, (pancake) ideal for exceptionally confined places, with stroke lengths of only 6mm, yet capacities up to about a hundred tonnes. The common single acting low height cylinders are the most popular and offer stroke lengths from 25mm up to 60mm and capacities nearing 150 tonnes. The single acting multi-purpose hydraulic cylinders offer the widest array of stroke lengths, from 25mm up to 457mm, as well as with capacities up to 109 tonnes. These models are ideal for maintenance, construction, fabrication and production operations, and can be usually found in power plants, railways and steel works, mining and shipyards; oil and gas. Double acting hydraulic cylinders are probably the most adaptable and sturdy, and are suitable for heavy duty operations, like construction and maintenance operations and in addition presswork and industrial production. The double acting design gives a superb pulling force in the piston retraction mode furthermore presents rapid, and controlled retraction, i.e, controlled raising AND lowering. There are a variety of types of hydraulic cylinders available, and many have different properties to others, such as, some have spring returns, and some will have tilting saddles. We will now offer a couple of basic safety recommendations on using hydraulic lifting equipment.. ALWAYS: Read instruction guide ensure all components have matching capacity and pressure ratings Avoid bends and kinks in hoses ensure the ground is stable Support load mechanically prior to working under the load Completely retract piston rods prior to disconnecting hoses. Choose a capacity well over your actual requirements. Use correct hydraulic fluid Provide appropriate support under the load Transport and store hydraulic equipment correctly and safely. Inspect prior to use Immediately inspect any trace of oil leaks Do not; Combine components with different ratings Place objects on hydraulic hoses Work beneath a load that is merely supported by hydraulic equipment Disconnect hoses until piston completely retracted Use should you be unsure how it works test first. Allow a load to drop onto extended cylinders Carry cylinders by the hose Use if leaking oil. Leave outdoors Operate on soft ground Keep in mind, SAFETY COMES FIRST, If doubtful don't use. I hope you have found this article of some value.
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Lifting Equipment Ltd has provided many types of lifting equipment, hydraulic cylinders, for many years to trade and industry, for more information please visit our web sites for more lifting gear, hydraulic cylinders products or liftingequipment, hydraulics our team are always ready to help.
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