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    Something You Want to Know About Air Motor

    ATO provides two types air motors: piston air motor and vane air motor. High quality and good price air motor can be chosen in our website. Air motors with simple structure, small size, strong power, water resistance, fire protection, moisture and explosion proof. In the following, we will introduce something abour air motor and. After reading this article, you can have a certain understanding of our air motor.

    What is Air Motor?

    15hp pneumatic vane air motor

    Air motor, also known as pneumatic motor, refers to the pressure energy of compressed air into rotating mechanical energy device. Generally used as a rotary power source for more complex devices or machines.

    Air motor is a prime mover with compressed air as the working medium. It is a power device that converts pressure energy into mechanical energy by using the expansion effect of compressed gas. Air motor according to the structure of the classification: vane air motor, piston air motor, compact vane pneumatic motor, etc.

    Advantages of Air Motor:

    Air motors are used for various applications in many industries such as food, chemical, agricultural, petrochemical, or even nuclear industries. They particulary fit well when speaking of very demanding or heavy duty environments as they offer numerous advantages in terms of safety, flexibility, reliability and productivity.

    • Safety. This is a key argument, air motors have many advantages regarding the safety. Air motors do not overheat or produce any sparks, so there is no risk of fire or explosion in sensitive area.
    • Flexibility. Air motor can operate in any position. It does not require a sophisticated control system. It is easy to vary the torque or rotation speed with a simple installation (limiting the air supply flow or pressure).
    • Reliability. Air motors offer incomparable reliability. When stalled, an air motor does not heat up or deteriorate, even at elevated cycles. The stall torque may be used to tighten at a required torque for example. Air motors do not generate any current peaks upon starting. They are continuously cooled by the supplied air expansion, preventing it from overheating, even at very high speeds.
    • Productivity. Installation costs are reduced. There is no need for a sophisticated control and protection system (circuit breaker, contactors, variable speed drives, etc), just a simple airflow output/ pressure regulator is sufficient. Maintenance costs are reduced. The design is proven, mechanical parts are available, and there are no skills or specific authorizations required.

    Air Motor Performance Characteristics:

    Air motor performance characteristics

    The power characteristics of air motors are similar to series DC motors. With constant inlet pressure, the brake horsepower of the air motor is zero at zero speed. Power increases with speed until it peaks at around 50% of free speed (maximum speed under no-load conditions)

    At the peak point, torque decreases and rotational speed increases. When the torque is zero, the power drops to zero because all the intake power is used by the motor to force the amount of air needed to maintain this speed.

    Theoretically, the torque output by an air motor for a given displacement is a function of differential pressure, a constant that depends on the physical parameters of the motor. Therefore, the torque should be constant for a given operating pressure, regardless of the rotational speed. In practice, this is not the case because as the air flow through the motor increases, the pressure loss in the inlet and outlet lines consumes a larger portion of the supply.

    Air Motor Troubleshooting:

    Air motor troubleshooting

    • No rotation of the output shaft. Insufficient air supply; excessive load on the shaft; jamming inside the motor / blades blocked. We should check air supply; check hose connection; check and reduce load applied; rotate the shaft manually or with a plier without exceeding the motor maximum torque.
    • Insufficient power, torque or speed. Lack of pressure; lack of air flow; exhast counter-pressure; lack of lubrication. We should check air pressure; check air flow; check that the muffler / silencer is clean, adequate and properly fitted. For a reversible motor, check that the orifice opposite to air inlet or exhaustorifice are connected to exhaust.
    • Wrong rotation direction. Wrong hose connection. We should reverse inlet and outlet and check air connections.
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