What is a Piston Air Motor?
A piston air motor is an air motor that converts the linear motion of several pistons into rotary motion through a crank or a swash plate. According to their different structures, they can be divided into radial piston type and axial piston type. Piston air motors are suitable for applications with low speed and high torque. The air consumption is not small, which has many components, and the price is expensive. Piston-type air motors are mainly used in mining machinery, and can also be used as drive motors for conveyor belts, etc.
Working principle of piston air motor
The compressed air enters the valve core to make it rotate, and at the same time, the compressed air is fed into the surrounding cylinders in turn by the rotation of the valve core. Due to the expansion of the compressed air in the cylinder, the piston rod and the crankshaft are pushed to rotate. When pushed to the "bottom dead center", the valve spool also moves to the first exhaust position. The expanded gas is discharged directly from the cylinder through the exhaust port of the valve. At the same time, the remaining gas in the piston cylinder is all discharged from the exhaust port of the valve core distribution valve. After such a reciprocating cycle, the crankshaft can be continuously rotated. Its work mainly comes from the gas expansion work.
Characteristics of piston air motor
- You can adjust the speed steplessly: That is, as long as the intake valve or exhaust valve is controlled, the compressed air flow can be controlled, thereby adjusting the power and speed of the motor.
- It can rotate forward and reverse. Although there are many types of air motors, most motors can change the direction of intake and exhaust by simply operating the valve, and the function can realize the direction of forward and reverse rotation of the motor output shaft, which can be converted instantaneously, and the impact force is very small.
- Work safety, not affected by vibration, high temperature, electromagnetic, radiation, etc.
