The drive shaft is subjected to alternating stresses such as torsion, shear, tension and compression, and impact, which can also cause torsion and bending vibration of the drive shaft, resulting in additional stress; uneven stress distribution; sliding friction between the drive journal and the bearing. The main failure forms of the drive shaft are fatigue fracture and serious journal wear. Therefore, the material must have high strength, a certain impact toughness, sufficient bending, torsion fatigue strength and rigidity, and the journal surface has high hardness and wear resistance.

The actuator inputs a standard signal of 0-10 mA, and the motor unit drives the gear, turbine and worm angle torque to drive the disc plate to rotate. When the valve is in the fully open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics.

Flange is a part that connects between the shaft and the shaft, which is used for the connection between the pipe ends; it is also used for the flange on the import and export of the equipment, which is used for the connection between the two equipment, such as the reducer flange. Flange connection or flange joint refers to the detachable connection which is connected by flange, gasket and bolt as a group of combined sealing structure.

The half shaft gear is the gear in the car differential. It is a conical gear. The car is equipped with two. The car has two drive shafts, which connect two half shaft gears to drive the left and right wheels respectively. The half shaft gear is installed on the differential assembly, and one end of the car transmission half shaft is connected to the half shaft gear with a spline.