Cylinders allow hydraulic systems to use linear motion and force without mechanical gears or levers by shifting the pressure from fluid via a piston to begin operation. Hydraulic cylinders are at work in both industrial applications (hydraulic presses, cranes, forges, packing machines), and mobile applications (agricultural machines, construction equipment, marine equipment). And, in comparison with pneumatic, mechanical or electric systems, hydraulics may be simpler, stronger, and offer greater power. For example, Manual Hydraulic Ram has about 10 times the power density of an electric motor of comparable size. Hydraulic cylinders can be found in an impressive array of scales to meet a variety of application needs.
Selecting the right cylinder for an application is crucial to attaining maximum performance and reliability. Which means taking into consideration several parameters. Fortunately, a variety of cylinder types, mounting techniques and “rules of thumb” are offered to help.
The three most typical cylinder configurations are tie-rod, welded and ram styles. Tie-rod cylinders use high-strength threaded steel tie-rods, typically on the outside the cylinder housing, to supply additional stability. Welded cylinders include a heavy-duty welded cylinder housing having a barrel welded directly to the conclusion caps, and require no tie rods. Ram cylinders are just what they appear to be-the cylinder pushes straight ahead using high pressure. Ram cylinders are employed in heavy-duty applications and more often than not push loads rather than pull.
For all types of cylinders, the crucial measurements include stroke, bore diameter and rod diameter. Stroke lengths differ from under an inch to a few feet or even more. Bore diameters can vary from an inch up to a lot more than 24 in., and piston rod diameters vary from .5 in. to more than 20 in. In practice, however, the choice of stroke, bore and rod dimensions may be limited by environmental or design conditions. As an example, space might be too limited for your ideal stroke length. For tie-rod cylinders, increasing how big the bore also means increasing the number of tie rods necessary to retain stability. Improving the diameter from the bore or piston rod is an ideal way to make amends for higher loads, but space considerations may not allow this, in which case multiple cylinders may be needed.
Mounting methods also play a crucial role in cylinder performance. Generally, fixed mounts on the centerline from the cylinder are perfect for straight line force transfer and avoiding wear. Common types of mounting include:
Flange mounts-Very strong and rigid, but have little tolerance for misalignment. Experts recommend cap end mounts for thrust loads and rod end mounts where major loading puts the piston rod in tension. Side-mounted cylinders-Simple to install and repair, however the mounts produce a turning moment since the cylinder applies force to your load, increasing damage. To avoid this, specify a stroke at least provided that the bore size for side mount cylinders (heavy loading tends to make short stroke, large bore cylinders unstable). Side mounts must be well aligned as well as the load supported and guided.
Centerline lug mounts -Absorb forces on the centerline, but require dowel pins to secure the lugs to avoid movement at higher pressures or under shock conditions. Pivot mounts -Absorb force on the cylinder centerline and enable the cylinder change alignment in a single plane. Common types include clevises, trunnion mounts and spherical bearings. As these mounts allow a cylinder to pivot, they ought to be combined with rod-end attachments which also pivot. Clevis mounts can be utilized in every orientation and are generally suitable for short strokes and small- to medium-bore cylinders.
Operating conditions-Cylinders must match a certain application regarding the level of pressure (psi), force exerted, space requirements imposed by machine design, and so on. But learning the operating requirements is simply half the task. Cylinders must also withstand high temperatures, humidity and also salt water for 300m Snake Push Pull Rod. Wherever temperatures typically rise to greater than 300° F, standard Buna-N nitrile rubber seals may fail-choose cylinders with Viton synthetic rubber seals instead. While in doubt, assume operating conditions may well be more rugged compared to what they appear at first glance.
Fluid type-Most hydraulics use a type of mineral oil, but applications involving synthetic fluids, including phosphate esters, require Viton seals. Yet again, Buna-N seals may not be adequate to deal with synthetic fluid hydraulics. Polyurethane is also incompatible rich in water-based fluids like water glycol.
Seals -This has become the most vulnerable part of Hydraulic Hose Pipe Price List. Proper seals can reduce friction and wear, lengthening service life, as the wrong form of seal can cause downtime and maintenance headaches.
Cylinder materials -The type of metal used for cylinder head, base and bearing can easily make a significant difference. Most cylinders use SAE 660 bronze for rod bearings and medium-grade carbon steel for heads and bases, which is adequate for most applications. But stronger materials, including 65-45-12 ductile iron for rod bearings, can offer a substantial performance rldvub for tough industrial tasks. The sort of piston rod material may be important in wet or high-humidity environments (e.g., marine hydraulics) where17-4PH stainless might be stronger compared to standard case-hardened carbon steel with chrome plating used for most piston rods.
Yongxiang Hydraulic Equipment Co., Ltd locates in Yangzhou, CN, and it covers an area of 143,500 square feet. Winning customer trust with innovation, Yongxiang has been aiming to provide customers with safe and reliable hydraulic products, services, on-time delivery, and customer satisfaction while ensuring employee safety, fostering employee relations and driving efficiency improvements.
Jiangsu Yongxiang Hydraulic Equipment Co. Ltd
Factory: Wujian Industrial Park, Jiangdu District, Yangzhou, CN
Office: 3107# No.2 Building, Global Financial Center, Wenchang East Road, Yangzhou, CN
E-mail: [email protected]