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 begin 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 may be simpler, stronger, and offer greater power. For instance, Hydraulic Ram Cylinder has about 10 times the power density of an electric motor of similar size. Hydraulic cylinders can be found in a remarkable array of scales to meet a variety of application requirements.
Choosing 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 for sale to help.
The three 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 of the cylinder housing, to offer 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 what they appear to be-the cylinder pushes straight ahead using high pressure. Ram cylinders are used in heavy-duty applications and typically push loads rather than 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 a few feet or even more. Bore diameters may range from an inch approximately a lot more than 24 in., and piston rod diameters vary from .5 in. to a lot more than 20 in. In reality, however, deciding on a stroke, bore and rod dimensions might 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 the size of the bore does mean increasing the amount of tie rods necessary to retain stability. Enhancing the diameter in the bore or piston rod is a great method to make amends for higher loads, but space considerations may well not allow this, whereby multiple cylinders is usually necessary.
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 kinds 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-Very easy to install and service, however the mounts generate a turning moment as the cylinder applies force to a load, increasing wear and tear. To avert this, specify a stroke at the very least as long as 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 stop 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. Because these mounts allow a cylinder to pivot, they must be used in combination with rod-end attachments which pivot. Clevis mounts can be utilized in almost any orientation and tend to be suitable for short strokes and small- to medium-bore cylinders.
Operating conditions-Cylinders must match a specific application with regards to the level of pressure (psi), force exerted, space requirements imposed by machine design, and so on. But understanding the operating requirements is only half the task. Cylinders should also withstand high temperatures, humidity as well as salt water for Hydraulic Cylinder For Press. 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. When in doubt, assume operating conditions could be more rugged than they appear at first glance.
Fluid type-Most hydraulics use a form of mineral oil, but applications involving synthetic fluids, such as phosphate esters, require Viton seals. Once more, Buna-N seals might not be adequate to take care of synthetic fluid hydraulics. Polyurethane is also incompatible with high water-based fluids like water glycol.
Seals -This is among the most vulnerable aspect of Lifting Hydraulic Jack. Proper seals is effective in reducing friction and wear, lengthening service life, as the wrong type 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, that is adequate for the majority of applications. But stronger materials, like 65-45-12 ductile iron for rod bearings, provides a sizable performance rldvub for tough industrial tasks. The kind of piston rod material could be essential in wet or high-humidity environments (e.g., marine hydraulics) where17-4PH stainless steel could be stronger compared to the 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]