Cylinders allow hydraulic systems to apply linear motion and force without mechanical gears or levers by shifting the pressure from fluid through a piston to the point of 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 to pneumatic, mechanical or electric systems, hydraulics may be simpler, stronger, and provides greater power. As an example, Hydraulic Motor Price has about ten times the power density of an motor unit of similar size. Hydraulic cylinders are also available in an impressive array of scales to meet an array of application needs.
Selecting the right cylinder to have 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 3 most common 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 provide additional stability. Welded cylinders include a heavy-duty welded cylinder housing with a barrel welded straight to the conclusion caps, and require no tie rods. Ram cylinders are simply whatever they seem like-the cylinder pushes straight ahead using extremely high pressure. Ram cylinders are employed in heavy-duty applications and more often than not push loads instead of pull.
For all sorts of cylinders, the crucial measurements include stroke, bore diameter and rod diameter. Stroke lengths differ from less than an inch to many feet or maybe more. Bore diameters can range from an inch approximately more than 24 in., and piston rod diameters range between .5 in. to more than 20 in. In reality, however, the choice of stroke, bore and rod dimensions could be limited by environmental or design conditions. For example, space could be too limited for your ideal stroke length. For tie-rod cylinders, increasing the dimensions of the bore also means increasing the quantity of tie rods necessary to retain stability. Enhancing the diameter of the bore or piston rod is a great way to make amends for higher loads, but space considerations may not allow this, whereby multiple cylinders may be required.
Mounting methods also play a crucial role in cylinder performance. Generally, fixed mounts on the centerline in the cylinder are ideal for straight line force transfer and avoiding wear. Common kinds of mounting include:
Flange mounts-Quite 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-Very easy to install and service, but the mounts produce a turning moment as the cylinder applies force to some load, increasing damage. To avoid this, specify a stroke at least provided that the bore size for side mount cylinders (heavy loading is likely to make short stroke, large bore cylinders unstable). Side mounts need to 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 prevent 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 must be used with rod-end attachments that also pivot. Clevis mounts can be used in any orientation and tend to be recommended for short strokes and small- to medium-bore cylinders.
Operating conditions-Cylinders must match a certain application regarding the amount of pressure (psi), force exerted, space requirements imposed by machine design, and the like. But understanding the operating requirements is just half the task. Cylinders should also withstand high temperatures, humidity as well as salt water for Irrigation Hydraulic Control Valve. Wherever temperatures typically rise to a lot more 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 could be more rugged compared to they appear at first glance.
Fluid type-Most hydraulics use a kind of mineral oil, but applications involving synthetic fluids, including phosphate esters, require Viton seals. Yet again, Buna-N seals might not be adequate to take care of synthetic fluid hydraulics. Polyurethane is also incompatible rich in water-based fluids like water glycol.
Seals -This has become the most vulnerable element of Hydraulic Cylinder Piston Small. Proper seals can reduce friction and wear, lengthening service life, while the wrong form of seal can result in downtime and maintenance headaches.
Cylinder materials -The type of metal utilized for cylinder head, base and bearing can create 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 the majority of applications. But stronger materials, like 65-45-12 ductile iron for rod bearings, provides a substantial performance rldvub for tough industrial tasks. The type of piston rod material can be essential in wet or high-humidity environments (e.g., marine hydraulics) where17-4PH stainless-steel could be stronger than the standard case-hardened carbon steel with chrome plating utilized 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]