Four main methods to control pneumatic motors
Release time:
2020-02-17
We all know that by installing a pressure reducing valve at the upstream gas supply, we can also adjust the speed and torque. When low-pressure air is continuously supplied to the motor and the motor slows down, very low torque is generated on the output shaft. Today, let me summarize the four main methods for controlling pneumatic motors: 1. The compressed air supply must have sufficiently large pipes and valves to ensure the motor's maximum torque. At any time, the motor requires a supply pressure of 6 bar; if the pressure drops to 5 bar, the power will decrease, throttling the motor. 2. The air supplied to the motor must be filtered and reduced in pressure. The directional control valve needs to supply air to the motor and rotate the motor when needed. Such valves can be pneumatically controlled, electrically controlled, or mechanically controlled. 3. If the motor is not used for directional rotation, a flow control valve can be installed in the supply line to adjust the motor's speed. If the motor is used for reverse rotation, a flow control valve with an internal one-way function is needed to adjust the rotation in each direction. The valve with an internal one-way function allows air to be discharged from the motor's residual air exhaust port to the control valve's exhaust port, and then out. 4. When the motor is used in applications that do not require bi-directional rotation, using a 2/2 or 3/2 valve for control is sufficient. For motors that can rotate in reverse, a 5/3 valve or two 3/2 valves are needed to ensure the motor has a compressed air supply and residual air discharge. The above summarizes the four methods for controlling pneumatic motors. Additionally, the most common way to reduce the speed of a pneumatic motor is to install a flow control valve at the intake. When the motor uses the intake, it can also be used for the exhaust. Flow control is also used on the main exhaust port, allowing speed control in both directions. I hope this can help everyone, and friends are welcome to visit the factory.
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