Vane air motors are smaller, lighter in weight and less expensive than piston motors of similar power. The simple design and construction allow them to operate at any installation angle in most cases. Vane motors have a wider range of speeds, torques, and power and are the most commonly used form of air motors. Radial piston air motors run at a lower speed than vane motors. It has excellent starting and speed control performance. Particularly good at operating at low speeds and heavy loads. The standard operating position is horizontal. Reversible/Unidirectional Rotating Air MotorsUnidirectional rotating air motors have slightly higher speed, torque, and power ratings than the same range of reversible air motors when selected air motors, keep in mind that the specification list only shows a set of performance numbers at a specific pressure of 90 psig (6 bar). The calibrated performance of the air motor is the operating performance at this pressure.
By adjusting the pressure, supply or exhaust, the same motor can achieve many different speeds. Torque and power. When they operate at pressures below 40 psig, their performance can be unstable. A rule to follow is to determine the size of the air motor based on a minimum air pressure of about 70%. This allows for additional power to be used for pneumatics and possible overloads.
Maximum power: The unregulated air motor outputs maximum power at about 50% of the idle speed, while the motor with regulated speed reaches its peak power at about 80% of the idle speed.
Working speed: When selecting an air motor, the working speed should be considered, rather than the no-load speed of the air motor without speed regulation should not be operated without load. The performance curve indicates the maximum speed at which the motor should be running. The presence of the embossed speed on the nameplate is only for identification purposes.
Required torque: Just as important as the operating speed of the air motor is the operating torque. The combination of two factors, speed and torque, determines the power of the motor required. When choosing to use Martha, it is important to pay attention to the difference between stall torque and rated torque.
Speed and torque: The starting torque is about 75% of the stall torque, and the running torque or rated speed torque at any speed can be close to the motor performance curve, or calculated by the following formula:
P=M*n/9550
P = output power in KW
M = Rated torque in Nm
n = rated speed in rpm