Composition And Principle Of Electric Torque Wrench
Apr 25, 2020
Electric torque wrench A torque wrench that uses a high-pressure air pump as its power source.A torque multiplier with three or more epicyclic gears is driven by one or two powerful electric motors.The torque is controlled by adjusting the gas pressure.In order to allow specific torque requirements to be set,each tool is equipped with a dedicated air pressure to torque comparison chart and correction report.And for further application,the electric wrench can be equipped with a torque sensor at the same time,and the output torque is more accurate.After obtaining the required torque,a suitable circuit system can be used to shut off the air supply manually or automatically.
The torque calculation formula for rotating objects is T = 9550P/np is the power,the unit is kW,n is the speed,the unit is rpm,r/min.The torque unit is Nm Torque is the product of force and arm length.For the wrench,200NM means that the distance from the rotation point of the wrench to the point of focus of the heart wrench is one meter,and the applied force is 200N.From the definition of torque and the principle of lever,we can see that adding 100N to the wrench at 2M or 400N at the wrench at 0.5M will produce 200NM of torque.
How to calculate the power arm of this electric wrench? The main problem is that the output power of the electric motor is obtained by multiplying the air supply pressure by the effective area of the electric piston,and then calculated by the torque transmission of each component of the transmission mechanism.It is difficult to figure out the dimensional drawings or survey data without internal components.
You can actually test,for example,use an electric wrench to twist a disc with a radius of 1 meter,and see how hard it is to make the disc not turn.
Torque is the product of force and arm length.For the wrench,200NM means that the distance from the rotation point of the wrench to the point of focus of the heart wrench is one meter,and the applied force is 200N.From the definition of torque and the principle of lever,we can see that adding 100N to the wrench at 2M or 400N at the wrench at 0.5M will produce 200NM of torque.The average electric wrench has a torque of more than ten to thirty or forty Nm,and a 200 Nm air wrench has not been heard,but it is thought to be operated by a machine.
