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Pneumatic actuator principle, you understand?


Release time:

2022-06-14

Today, by Wuxi Xinming automatic control valve industry Co., Ltd. for you to introduce in detail the principle of pneumatic actuator: Overview of a pneumatic actuator Pneumatic actuator is the use of gas pressure to drive the opening and closing of the valve or the implementation of the conditioning equipment, also known as the pneumatic actuator or pneumatic equipment, but generally shallow called the pneumatic head. The piston stroke is long and is suitable for occasions requiring large thrust; while the diaphragm stroke is small and can only directly drive the valve stem. Fork-type pneumatic actuator has the characteristics of large torque, small space, and torque curve more in line with the torque curve of the valve, but it is not very beautiful; it is often used in large torque valves. The rack and pinion pneumatic actuator has the advantages of simple structure, stable and reliable action, and safety and explosion-proof. It is widely used in power plants, chemical industry, oil refining and other production processes with high safety requirements. Two working principle of pneumatic actuator 1. Operation schematic diagram of double-effect pneumatic actuator When the air source pressure enters the middle cavity between the two pistons of the cylinder from the air port (2), the two pistons move away from each other in the direction of the two ends of the cylinder, and the air in the air chambers of the two ends is discharged through the air port (4), so that the two piston racks together The synchronous drive output shaft (gear) rotates counterclockwise. On the contrary, when the air source pressure enters the air chambers at both ends of the cylinder from the air port (4), the two pistons move towards the center of the cylinder, and the air in the central air chamber is discharged through the air port (2), so that the two piston racks synchronously drive the output shaft (Gear) rotates clockwise. (If the piston is installed in the opposite direction, the output shaft will rotate in the opposite direction.) 2. Operation principle of single effect pneumatic actuator When the air source pressure enters the middle cavity between the two pistons of the cylinder from the air port (2), the two pistons move away from each other to the two ends of the cylinder, forcing the springs at both ends to compress, and the air in the air chambers at both ends is discharged through the air port (4). Together, the two piston racks synchronously drive the output shaft (gear) to rotate counterclockwise. After the air source pressure is reversed by the solenoid valve, the two pistons of the cylinder move in the center direction under the elastic force of the spring, and the air in the central air chamber is discharged from the air port (2), so that the two pistons rack synchronously drive the output shaft (gear) Rotate clockwise. (If the piston is installed in the opposite direction, the output shaft will rotate in the opposite direction when the spring returns). The above is all the contents of the principle, classification and selection of pneumatic actuators introduced in detail by Wuxi Xinming automatic control valve industry Co., Ltd., if you have any questions, please feel free to come to consult!

Pneumatic actuator principle, you understand?

Today, by Wuxi Xinming automatic control valve industry Co., Ltd. for you to introduce in detailPneumatic actuatorPrinciple:

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OnePneumatic actuatorOverview
Pneumatic actuator is the use of gas pressure to drive the opening and closing of the valve or the implementation of the conditioning equipment, also known as the pneumatic actuator or pneumatic equipment, but generally shallow called the pneumatic head.
The piston stroke is long and is suitable for occasions requiring large thrust; while the diaphragm stroke is small and can only directly drive the valve stem. Fork-type pneumatic actuator has the characteristics of large torque, small space, and torque curve more in line with the torque curve of the valve, but it is not very beautiful; it is often used in large torque valves. The rack and pinion pneumatic actuator has the advantages of simple structure, stable and reliable action, and safety and explosion-proof. It is widely used in power plants, chemical industry, oil refining and other production processes with high safety requirements.
Two working principle of pneumatic actuator
1. Operation schematic diagram of double-effect pneumatic actuator
When the air source pressure enters the middle cavity between the two pistons of the cylinder from the air port (2), the two pistons move away from each other in the direction of the two ends of the cylinder, and the air in the air chambers of the two ends is discharged through the air port (4), so that the two piston racks together The synchronous drive output shaft (gear) rotates counterclockwise. On the contrary, when the air source pressure enters the air chambers at both ends of the cylinder from the air port (4), the two pistons move towards the center of the cylinder, and the air in the central air chamber is discharged through the air port (2), so that the two piston racks synchronously drive the output shaft (Gear) rotates clockwise. (If the piston is installed in the opposite direction, the output shaft will rotate in the opposite direction.)
2. Operation principle of single effect pneumatic actuator
When the air source pressure enters the middle cavity between the two pistons of the cylinder from the air port (2), the two pistons move away from each other to the two ends of the cylinder, forcing the springs at both ends to compress, and the air in the air chambers at both ends is discharged through the air port (4). Together, the two piston racks synchronously drive the output shaft (gear) to rotate counterclockwise. After the air source pressure is reversed by the solenoid valve, the two pistons of the cylinder move in the center direction under the elastic force of the spring, and the air in the central air chamber is discharged from the air port (2), so that the two pistons rack synchronously drive the output shaft (gear) Rotate clockwise. (If the piston is installed in the opposite direction, the output shaft will rotate in the opposite direction when the spring returns).







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The above is all the contents of the principle, classification and selection of pneumatic actuators introduced in detail by Wuxi Xinming automatic control valve industry Co., Ltd., if you have any questions, please feel free to come to consult!