Cylinder types and characteristics, cylinder types and sizes

Cylinder types and characteristics






Today, the application of pneumatic components in automated equipment and production lines is becoming more and more important and popular, and cylinders are one of them. There are many types of cylinders, including piston type, membrane type, rotary type, etc. Today, let’s get to know different cylinders and understand the characteristics of different cylinders.

























Cylinder type and size





A cylinder, also known as a pneumatic actuator, is a device used to provide motion and force in industrial automation applications. Cylinders use compressed air to create force. Cylinder equipment is widely used in automation systems, machining equipment and processes. The movement of the equipment can be accomplished directly or indirectly by relying on the cylinder, and the load can be moved by pushing, pulling, etc.


Cylinders are one of the most critical components in manufacturing machinery, such as CNC machine tools and industrial robots, as well as mobile equipment, such as excavators and mining trucks. Cylinders Cylinder assemblies are simpler, more durable, and provide significantly higher power density than pneumatic, mechanical, or electric linear motion systems.












What should you pay attention to when choosing the appropriate cylinder type?





Choose the appropriate cylinder type. First of all, you need to know which equipment the cylinder will be installed in. Most cylinder equipment is used in the manufacturing industry. There are basically two types of cylinders used in the manufacturing industry, namely tie rod cylinders and welding cylinders. Tie rod cylinders use high strength threaded steel tie rods on the outside of the cylinder housing for added strength and stability. This is a very common type of cylinder in the manufacturing industry, and they are widely used in CNC machine tools and automated robots.





Welded or rolled cylinders have a heavy-duty housing with a barrel that is welded or bolted directly to the end cap, eliminating the need for tie rods. They are designed for pressures of 5,000psi or higher and are generally more suitable for more rugged applications such as presses, steel mills and offshore environments with harsh environments and wide temperature swings.

Cylinders are often custom made. Cylinder standards specify size, pressure rating, mounting type, etc. However, there are some special cylinder models that engineers designing custom machinery need to deviate from the standard through special mounting, port sizes or configurations to suit a specific application.






Things to consider when choosing cylinder size

1. The diameter of the cylinder piston rod is very critical. Perhaps one of the more common errors in cylinder design is undersizing the piston rod, making the cylinder more susceptible to stress, wear and failure. Piston rod diameters can range from 0.5 inches to over 20 inches, but they must be sized for the available load. In propulsion applications, it is important to correctly size the rod diameter based on Euler calculations to avoid buckling or bending of the rod. When designing a cylinder to produce the required force, the size of the cylinder's piston rod is always a primary consideration.



2. Prevent the rod from bending. In long-stroke cylinders, the fully extended rod can bend under its own weight. Excessive flexing can cause wear and damage to seals and bearings. It may even cause the piston to cock up in the bore, scratching and damaging the inner surface of the cylinder. Rod deflection must not exceed 1 to 2 mm. Cylinder rods that are at risk of bending or misaligning require additional support. Depending on the stroke length, a stop tube may be required;this increases the bearing area of ​​the cylinder to prevent excessive wear. Engineers may also consider using larger diameter rods to increase strength. But this also adds weight and can be self-defeating, so calculate carefully.






3. When choosing the appropriate size, we also need to pay attention to the impact load of the cylinder. Stroke length, the distance required to push or pull a load, can range from less than an inch to several feet or more. But when the cylinder extends or retracts, make sure the piston doesn't bottom out and create a shock load at the end of the stroke. Engineers have several options: add an internal cushion to decelerate the load near the end of stroke;add an external mechanical stop to prevent the cylinder from bottoming;or use proportional valve technology to accurately meter flow and safely decelerate the load.





The above is the introduction of cylinder types and characteristics, cylinder types and sizes. If you want to know more relevant information, please log in to Sunway Pneumatic www.diancifa.cc.