Several important parameters about the selection of cylinder type and specification size are answered by everyone: 1. Standard cylinder is one of the most widely used cylinders, commonly used are Yade passenger SC cylinder, SI cylinder, SU cylinder, DNC Festo FESTO cylinder, SMC MBB cylinder, domestic QGB series, etc. Secondly, the main characteristics and advantages of standard cylinder. 1. Cylinder diameter is divided into 32-320 mm. Cylinder stroke can reach 2000 mm. 2. The front and rear end caps of the cylinder have cushioning and adjusting functions, so that both ends of the cylinder and piston run smoothly and without impact. 3. Various cylinder mounting accessories are available, flexible and changeable. How to select standard cylinder? The first choice is to confirm the cylinder diameter and stroke.

3. Cylinder Cylinder Diameter Travel

Travel is the error distance between the piston stretching out and retracting back. Some people will calculate the stroke by exposing the cylinder itself, which is wrong. Cylinder diameter is the diameter of the inner wall of cylinder, and the general external diameter can also be used to estimate the size of the inner diameter. Under the same pressure, the larger the cylinder diameter, the greater the output.

The functions of the standard cylinders commonly used in China are the same, the main difference is the size and model of the external installation; this is the basic outline of the standard cylinder, confirming the installation distance of the cylinder KB and the total length of the A + stroke cylinder, and the size of the accessories that need to be confirmed is also different.

Fourth, flange plate installation for standard cylinder needs confirmation of size, front flange installation needs confirmation: distance from flange to red line of piston rod and installation hole distance of flange plate BD and BF. If it is installed after the same, as long as the flange to the top of the cylinder distance is guaranteed, then the cylinder itself installation hole distance is not important.

Fifth, standard cylinder FA drawings are installed with CACB accessories to ensure the distance between the diameter hole of DE hole and the center point to the top of cylinder piston. The distance between the cylinder's own installation hole is irrelevant.

6. The distance between the installation holes of AC + stroke should be confirmed for the installation of LB pedestal in standard cylinder CA drawings.  Convenient installation of the bracket, confirm the middle distance between the bottom of the bracket and the piston rod and the length of expansion.

7. Installation of standard cylinder LB diagram TC and pendulum attachment bracket in TCM ensures the distance between TC intermediate shaft and the top of cylinder.

Eighth, standard cylinder TC icon standard cylinder accessories are the most types, different accessories can ensure the installation and use of cylinders in various working environments, can achieve unexpected results.

9. Cylinder structure is composed of cylinder, end cap, piston, piston rod and sealing parts.

1. The inner diameter of cylinder barrel represents the output force of cylinder. The piston should make smooth reciprocating sliding in the cylinder, and the surface roughness of the inner surface of the cylinder should reach Ra 0.8 um. The piston of CM2 cylinder adopts combined sealing ring to realize bidirectional sealing, and the piston and piston rod are riveted by pressure without nuts.

2. There are intake and exhaust ports on the end cover, and buffer mechanism in the end cover. The end cap of the rod side is provided with a sealing ring and a dust-proof ring to prevent air leakage from the piston rod and dust mixing from the outside into the cylinder. A guide sleeve is arranged on the side cover of the rod to improve the guiding accuracy of the cylinder, bear a small amount of transverse load on the piston rod, reduce the downward bending of the piston rod when it extends, and prolong the service life of the cylinder. The guide sleeve is usually made of sintered oil-bearing alloy and forward inclined copper castings. In the past, malleable cast iron was commonly used for end caps. In order to reduce weight and prevent rust, aluminum alloy die casting was often used, and brass material was used for micro cylinders.

3. Piston piston is a pressurized part in cylinder. In order to prevent the piston left and right cavities from channeling each other, a piston sealing ring is provided. The wear-resistant ring on piston can improve the directivity of cylinder, reduce the wear of piston sealing ring and reduce friction resistance. The wear-resistant ring length is made of polyurethane, polytetrafluoroethylene and cloth synthetic resin. The width of the piston is determined by the size of the sealing ring and the length of the necessary sliding part. The sliding part is too short to cause early wear and stuck. Pistons are usually made of aluminium alloy and cast iron. Pistons of small cylinders are made of brass.

4. Piston rod and piston rod are the most important force parts in cylinder.  Usually high carbon steel, hard chromium plated surface, or stainless steel are used to prevent corrosion and improve the wear resistance of sealing rings.

5. Seals of parts in the rotating or reciprocating motion of the sealing ring are called dynamic seals, and those of the stationary parts are called static seals. The connection methods between cylinder barrel and end cap are as follows: integral type, riveted type, threaded type, flange type and tie rod type.

6. The piston must be lubricated by oil mist in compressed air when the cylinder works. There are also a small number of non-lubricating cylinders.

Several important parameters of the above cylinder type and specification size selection are introduced here by the small edition. If you have other questions, you can see the other cylinder knowledge on this page.