Tieling pneumatic valve factory introduction to pneumatic valve electric device overload processing method

pneumatic valve electric device is used for operating pneumatic valve and in one of the pneumatic valve connected device. The device is driven by electricity, its movement process can by travel, torque, or to control the size of the axial thrust. Pneumatic valve electric device depends on the working characteristic and utilization of pneumatic valve, the kinds of work ethic and the location of the pneumatic valve in the pipeline or equipment.

choose basis:. Operating thrust. Host structure of the pneumatic valve electric device has two kinds, one kind is not configured thrust plate; The other is a configuration have thrust plate.
。 Operating torque. Operating torque is to select the main parameters of the pneumatic valve electric actuator.
。 Pneumatic valve stem diameter. If electric device allows the largest pneumatic valve stem diameter can't through the pneumatic valve pneumatic valve stem, cannot assemble into electric pneumatic valve.
usually adopts pneumatic valve electric actuator limit torque shafts. When the specifications of the electric actuator was determined, the control torque is also determined. When its in a predetermined time, motor generally do not overload. Low voltage power supply and can not get the required torque, the motor stop running. Setting a torque limit institutions, wrongly, that makes it more than stop torque, excessive torque caused by the continuous, make the motor stop running. As at intermittent use, the heat generated by the savings, more than the permissible temperature rise of the motor. A torque limit institutions circuit for some reason fails, the torque is too big. Using the environment temperature is too high, relative to bring down the heat capacity of the motor.
so must adopt the mode of combination of various methods. But because the load of every electric device is different, it is difficult to put forward a unified way. But for the most part, also can find common ground. Increase or decrease of the motor input current judgment; In the judgement of motor itself fever. The above two ways, both the heat capacity of the given time allowance to consider motor. If a single way to that of the heat capacity characteristics of the motor is difficult. So should choose according to the cause of the overload can reliable method of action - — Combined composite method, in order to realize the comprehensive overload protection. Continuous operation of motor or point operation overload protection by using a thermostat; Use fuse or overcurrent relay for short circuit accident. Correct selection of pneumatic valve electric actuator and is alawys related to prevent overload, should be taken into consideration seriously.