At the same power, the vane motor is smaller, lighter and less expensive than the piston motor. Due to its simplicity of design and manufacture, it can be used in almost all areas. The vane motor operates over a wide range of speeds and torques and is the most widely used gas motor type.
2. Radial (radial) piston air motor
Its speed is lower than that of the vane motor, but it has excellent starting and speed control performance, especially suitable for radial heavy load and low speed. Piston air motors are generally operated horizontally.
3. Reversible/irreversible motor
In the same type, the speed, torque and power of the irreversible air motor are higher than that of the reversible air motor.
4. working pressure
When a gas motor is selected, the performance table indicates a set of performance parameters for the gas at a specific working pressure of 90 psig (620 kPa), and the gas motor is in optimal design at this working pressure. By adjusting the intake and exhaust pressures, the speed, torque and power of the air motor can be adjusted infinitely;
When the air motor is below 40 psig, its performance may not be very stable;
The air motor can operate at operating pressures above 100 psig, but at this point the air motor wear is increased;
A principle can be followed when determining the air motor model: a selection of 70% of the minimum available air pressure allows the selected air motor to have sufficient power to handle the starting shock and possible overload.
5. Maximum power of air motor
The maximum power of the non-restricted speed motor is achieved at 50% of the free speed (no-load speed);
The maximum power of the speed limit motor is achieved at 80% of the free speed (no-load speed).
6. Working speed
The speed limit air motor does not run at no load;
The operating speed of the air motor can be ascertained in its performance curve, and the nominal speed on the nameplate is only a distinction.
7. Working torque
When determining the air motor model, as important as the speed is the operating torque, these two parameters determine the gas motor power. Pay attention to the difference between static (maximum) torque and working torque when selecting.
8. Air motor speed and torque
The starting torque is approximately 75% of the maximum torque;
Working torque (at different speeds) can be found on the motor performance curve or calculated by the following formula;
Torque (pounds, British) = horsepower. 5250 / speed (r / min)
Torque (N.M)=KW.9550/speed (r/min)
9. Radial load on the output shaft of a pneumatic motor
The radial load of the air motor output shaft (defined as the midpoint of the shaft key) should be considered when selecting the air motor. See the motor performance curve.
10. Air system and gas supply
Once the air motor is selected, the air pressure that the system can supply to the motor is important. The system air compressor calibration gas is not equivalent to the air pressure at which the air motor operates. This is due to the possible various losses in the system. The exhaust restriction of the motor also affects its performance.
11. Entrance control
A reversible air motor is installed, and a four-way valve or two three-way valves can be used to exchange the inlet and outlet ports.
12. Replace the electric motor with a pneumatic motor
Except for the DC motor, the characteristic curve of other electric motors is completely different from that of the air motor. Many electric motors allow for an excessively large safety factor for overload (ie, a waste of configuration), while a replacement gas motor can meet the requirements with relatively low power.
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