Cylinders allow hydraulic systems to apply linear motion and force without mechanical gears or levers by shifting the pressure from fluid by way of a piston to the point of operation. Hydraulic cylinders are at work in both industrial applications (hydraulic presses, cranes, forges, packing machines), and mobile apps (agricultural machines, construction equipment, marine equipment). And, in comparison to pneumatic, mechanical or electric systems, hydraulics can be simpler, stronger, and offer greater power. For example, Double Acting Hydraulic Ram has about 10 times the power density of an motor unit of similar size. Hydraulic cylinders can be found in an amazing variety of scales to meet an array of application requirements.
Selecting the right cylinder to have an application is critical to attaining maximum performance and reliability. That means taking into consideration several parameters. Fortunately, a variety of cylinder types, mounting techniques and “rules of thumb” are for sale to help.
Three of the most typical cylinder configurations are tie-rod, welded and ram styles. Tie-rod cylinders use high-strength threaded steel tie-rods, typically on the away from the cylinder housing, to supply additional stability. Welded cylinders include a heavy-duty welded cylinder housing having a barrel welded right to the end caps, and require no tie rods. Ram cylinders are only the things they sound like-the cylinder pushes straight ahead using high pressure. Ram cylinders are employed in heavy-duty applications and typically push loads as opposed to pull.
For all sorts of cylinders, the crucial measurements include stroke, bore diameter and rod diameter. Stroke lengths differ from lower than an inch to several feet or 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 option of stroke, bore and rod dimensions may be limited by environmental or design conditions. For instance, space may be too limited for the ideal stroke length. For tie-rod cylinders, increasing the size of the bore does mean increasing the number of tie rods needed to retain stability. Enhancing the diameter from the bore or piston rod is an ideal method to compensate for higher loads, but space considerations might not allow this, whereby multiple cylinders may be required.
Mounting methods also play an important role in cylinder performance. Generally, fixed mounts on the centerline from the cylinder are best for straight line force transfer and avoiding wear. Common types 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, nevertheless the mounts create a turning moment because the cylinder applies force to some load, increasing wear and tear. To prevent this, specify a stroke at the very 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 and also 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 allow the cylinder change alignment in a single plane. Common types include clevises, trunnion mounts and spherical bearings. Because these mounts allow a cylinder to pivot, they must be used with rod-end attachments which also pivot. Clevis mounts may be used in almost any orientation and tend to be recommended for short strokes and small- to medium-bore cylinders.
Operating conditions-Cylinders must match a specific application regarding the quantity of pressure (psi), force exerted, space requirements imposed by machine design, and so on. But knowing the operating requirements is just half the task. Cylinders also must withstand high temperatures, humidity and also salt water for 100 Ton Hydraulic Cylinder. Wherever temperatures typically rise to 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 will be more rugged compared to they appear at first.
Fluid type-Most hydraulics use a type of mineral oil, but applications involving synthetic fluids, like phosphate esters, require Viton seals. Once again, Buna-N seals might not be adequate to deal with synthetic fluid hydraulics. Polyurethane is also incompatible with higher water-based fluids including water glycol.
Seals -This has become the most vulnerable element of Electric Hydraulic Jack 150t. Proper seals is able to reduce friction and wear, lengthening service life, whilst the wrong type of seal can lead to downtime and maintenance headaches.
Cylinder materials -The kind of metal employed for cylinder head, base and bearing can make a significant difference. Most cylinders use SAE 660 bronze for rod bearings and medium-grade carbon steel for heads and bases, which can be adequate for many applications. But stronger materials, like 65-45-12 ductile iron for rod bearings, can provide a sizable performance rldvub for tough industrial tasks. The type of piston rod material may be crucial in wet or high-humidity environments (e.g., marine hydraulics) where17-4PH stainless could be more durable compared to standard case-hardened carbon steel with chrome plating employed 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]