How to make your motor shaft different, but also depends on your knowledge!
The shaft is one of the most important parts in the motor. Since most of the damage has fatigue properties, the requirements for general motor shaft materials are: high enough strength, low sensitivity to stress concentration and good processing performance. Except for the unimportant and less stressed shaft, Q235A, Q255A or Q275 ordinary carbon steel is generally made of 45 quality carbon steel, and then re-tempered if necessary. Today, Ms. is here to talk about the most basic requirements of the axis. The axis that seems to be relatively simple has a lot of knowledge.
When the diameter is less than about 10 cm, round steel is often used as the blank; for 10 cm or more, the stepped shaft blank is forged. Large motors and motor shafts subjected to impact loads are subject to higher material requirements due to their increased importance. Most of them are alloy steel forgings.
In recent years, the electroslag welding process has become more and more widely used in the motor industry. The shafts with extra large diameters (even small diameters) tend to use welded hollow shafts composed of multiple sections to reduce weight and save large forgings and reduce costs. .
In operation, the form of stress on the shaft varies with the type of motor and the transmission. Generally, in a vertical motor (such as a hydro-generator) that uses direct drive, the bearing is subjected to tensile stress caused by the weight of the rotor (sometimes with water thrust), shear stress generated by torque, and bending stress caused by one-sided magnetic pull force; In a horizontal motor that transmits torque, the rotating bearing is subjected to bending stress caused by the weight of the rotor, the unilateral magnetic pulling force, and an external force acting on the shaft extension (for example, belt tension) and the shear stress generated by the torque.
