As a pneumatic actuator, rotary cylinder generates energy conversion and power energy through air compression. How does the rotary cylinder work? What is its structure? What's the working principle?

Pneumatic actuator is an energy conversion device, which converts the pressure energy of compressed air into mechanical energy, and drives the organization to complete linear reciprocating motion, rocking, rotating motion or impact action. Pneumatic performance components are divided into cylinder and pneumatic motor. China air cylinder actuator is used to supply linear reciprocating motion or swing, output force and linear speed or swing angular displacement. The pneumatic motor is used to supply continuous reverse motion, output torque and speed. Pneumatic control elements are used to regulate the pressure, flow and direction of compressed air to ensure that the performing organization operates normally according to the prescribed procedures. Pneumatic control elements can be divided into pressure control valve, flow control valve and direction control valve according to their functions.

Working Principle of Rotary Cylinder

1. Typical Structure and Working Principle of Cylinder
Taking the single piston rod double acting cylinder which is most commonly used in pneumatic system as an example, China air cylinder actuator is composed of cylinder, piston, piston rod, front end cover, back end cover and sealing parts. The inside of the double acting cylinder is divided into two chambers by the piston. The cavity with piston rod is called rod cavity, and the cavity without piston rod is called rod cavity. When compressed air is input from the rodless chamber, the rod chamber exhausts, and the pressure difference between the two chambers of the cylinder acts on the piston to overcome the resistance load and push the piston to move, so that the piston rod extends; when the rod chamber is intake and the rod chamber is exhausted, the piston rod retracts. If the rod cavity and the rod cavity alternate intake and exhaust, the piston realizes reciprocating linear motion.

2. Classification of air cylinder actuator
There are many kinds of cylinders, which are generally classified according to their structural characteristics, functions, driving modes or installation methods. The classification methods are also different. According to the structural characteristics, China air cylinder actuator are mainly divided into piston cylinder and diaphragm cylinder. According to the form of motion, it can be divided into two categories: linear motion cylinder and swing cylinder.

Choice of air cylinder actuator

According to the working requirements and conditions, the type of cylinder should be selected correctly. The cushion cylinder should be chosen for the cylinder to reach the end of stroke without impact phenomenon and impact noise; the light cylinder should be chosen for the light weight; the thin cylinder should be selected for the short stroke and the narrow installation space; the cylinder with guide rod can be selected for the transverse load; the locking cylinder should be selected for the high braking accuracy; the cylinder with rod non-rotation function should be selected for the piston rod not to rotate; and the cylinder with rod non-rotation function should be selected for the high temperature environment. Use heat-resistant cylinder; in corrosive environment, it is necessary to choose corrosion-resistant cylinder. In the harsh environment such as dust, it is necessary to install a dust cover at the extended end of the piston rod. When no pollution is required, oil-free or oil-free lubrication should be selected.

The output thrust and pull force of the air cylinder actuator are determined according to the magnitude of the load force. Generally, according to the theory of external load, the cylinder force required for balancing conditions is selected according to different speeds, so that the output force of the cylinder has a little margin. The cylinder diameter is too small, the output force is not enough, but the cylinder diameter is too large, which makes the equipment heavy, increases the cost, increases the gas consumption and wastes energy. In fixture design, force expanding mechanism should be used as far as possible to reduce the cylinder size.