Working principle of dust removal cylinder, structure and composition of dust removal cylinder

Working principle of dust removal cylinder


The dust removal cylinder determines the push and pull forces on the piston rod based on the force required for work. Therefore, the cylinder should be selected so that the output force of the cylinder has a slight margin. If the bore diameter is selected to be small, the output force will be insufficient and the cylinder will not work properly;but if the bore diameter is too large, it will not only make the equipment bulky and costly, but also increase air consumption, resulting in a waste of power. When designing the fixture, a force-increasing mechanism should be used as much as possible to reduce the size of the cylinder.












Dust removal cylinder structure


The dust removal cylinder is composed of cylinder barrel, end cover, piston, piston rod and seals:

1. Cylinder barrel: The inner diameter of the dust removal cylinder barrel represents the output force of the cylinder. The piston must reciprocate smoothly in the cylinder barrel. The surface roughness of the inner surface of the cylinder barrel should reach Ra0.8um. ​​For steel pipe cylinder barrels , the inner surface should also be plated with hard chromium to reduce frictional resistance and wear, and to prevent corrosion. In addition to high-carbon steel pipes, the cylinder barrel material is also made of high-strength aluminum alloy and brass. Small cylinders use stainless steel pipes. For cylinders with magnetic switches or cylinders used in corrosion-resistant environments, the cylinder barrel should be made of stainless steel, aluminum alloy or brass.

2. End cover: The cylinder end cover is equipped with intake and exhaust ports. The oil is also equipped with a buffer mechanism in the end cover. The rod side end cover is equipped with a sealing ring and a dust ring to prevent the oil from flowing from the piston rod to the end cover. To prevent external air leakage and prevent external dust from mixing into the cylinder, a guide sleeve is provided on the rod side end cover to improve the guidance accuracy of the cylinder, bear a small amount of lateral load on the piston rod, reduce the amount of downward bending of the piston rod when it extends, and extend the Cylinder service life. The guide sleeve is usually made of sintered oil-containing alloy and forward-inclined copper casting. The end cover used to be malleable iron. Now, in order to reduce weight and prevent rust, aluminum alloy die-casting is often used. Micro cylinders are sometimes made of brass.


3. Piston: The piston is a pressure-bearing part in the cylinder. In order to prevent the left and right chambers of the piston from channeling air, a piston sealing ring is provided. The wear-resistant ring on the piston can improve the guidance of the cylinder, reduce the wear of the piston sealing ring, and reduce Frictional resistance. The wear-resistant ring length uses materials such as polyurethane, polytetrafluoroethylene, cloth-filled synthetic resin, etc. The width of the piston is determined by the size of the sealing ring and the necessary length of the sliding part. If the sliding part is too short, it can easily cause early wear and seizure. The materials of piston are commonly aluminum alloy and cast iron, and the piston of small cylinder is made of brass.

4. Piston rod: The piston rod is an important force-bearing part in the cylinder. It is usually made of high carbon steel with hard chromium plating on the surface, or stainless steel to prevent corrosion and improve the wear resistance of the sealing ring.

5. Sealing ring: The sealing of the rotating or reciprocating parts is called a dynamic seal, and the sealing of the stationary part is called a static seal.

The dust removal cylinder installs a polytetrafluoroethylene support ring on the piston to maintain uniform sealing performance when the piston moves, thereby reducing wear and extending service life. The buffer device adopts a new foreign structure, which can function as a one-way valve and make the cylinder structure more compact and reasonable.






Dust removal cylinders are suitable for use in all walks of life. Cylinders dedicated to dust removal equipment are generally used with lifting valves and electromagnetic pulse valves. The company customizes cylinders with different bores and strokes, cylinder flanges, and single-ear double-headed cylinders according to the specific requirements and needs of customers. Ears, as well as cylinder standard air rods and cylinder extended air rods, etc. The compressed air enters the air source treatment component. After being filtered, decompressed, and lubricated, dry, clean, and lubricated air with a certain pressure enters the cylinder through the solenoid valve.

The solenoid valve receives the signal from the electric control cabinet and controls the cylinder movement to realize automated processes such as cold air, ash unloading, offline ash cleaning, and back-blowing air conversion. Standard cylinders can be divided into: 63, 80, 100, and 125 specifications.

The normal working conditions of the dust removal cylinder: medium and ambient temperature are -5~70℃, and the working pressure is 0.1~1Mpa.

The dust removal cylinder movement speed range is 50~500mm/S. Solenoid valve K25JD to 25 series two-position five-way cut-off directional valve can be divided into five-port two-position/five-port three-position series specifications. The appropriate diameter must be selected according to the engineering requirements. , voltage, connecting thread, and installation form of solenoid valve. It can also be selected according to the actual use.






The above is the working principle of the dust removal cylinder, and the structure and composition of the dust removal cylinder are introduced. If you want to know more related information, please log in to Sunway Pneumatic www.diancifa.cc to view.