Classification and torsional stiffness of shafts
Classification of axes
According to the load, the 1.1 is divided into three types: transmission shaft,Rotating shaft, Mandrel.
1.1.1 Shaft-the shaft that bears both bending moment and torque during work.
1.1.2 Mandrel-a shaft that bears bending distance without transmitting torque during work.
1.1.3 Drive shaft-a shaft that only transmits torque and does not bear bending moment or very small bending moment during work.
The 1.2 is divided into three types according to the axis shape, which are steel wire flexible shaft, straight shaft and crankshaft.
1.2.1 Straight axis-the axis line is a straight line.
1.2.2 Crankshaft-axis line is a curve.
1.2.3 steel wire flexible shaft-axis line soft variable curve.
According to the shape of the shaft, the 1.3 is divided into four kinds: real shaft, hollow shaft, optical axis and stepped shaft.
1.3.1 Optical axis-axis with the same outer diameter.
1.3.2 Stepped shaft-a shaft with different outer diameters composed of shoulders.
1.3.3 Solid shaft-the shaft has material.
1.3.4 Hollow shaft-shaft without material.
1.4 according to rigid flexible divided into two kinds are hard and soft shaft.
1.4.1 Hard shaft-rigid shaft.
1.4.2 Flexible shaft-flexible shaft.
Structural Design of Shaft
The structural design of the shaft is an important step in determining the reasonable shape and all structural dimensions of the shaft. It is related to the type, size and position of the parts installed on the shaft, the fixing method of the parts, the nature, direction, size and distribution of the load, the type and size of the bearing, the blank, manufacturing and assembly process, installation and transportation of the shaft, the deformation of the shaft and other factors, designers can design according to the specific requirements of the shaft, and if necessary, several schemes can be compared in order to select the best design scheme. The following are the general shaft structure design principles: 1. Save materials, reduce weight, and try to adopt the cross-sectional shape with equal strength dimensions or large cross-sectional coefficient; 2. It is easy to accurately locate, stabilize, assemble, disassemble and adjust the parts on the shaft; 3. Adopt various structural measures to reduce stress concentration and improve strength; 4. Easy to process and manufacture and ensure accuracy.
Torsional stiffness of shaft
The torsional stiffness check of the shaft is the calculated torsional deformation of the shaft during operation. It is measured by the torsional angle per meter of shaft length. The torsional deformation of the shaft will affect the performance and working accuracy of the machine. If the torsion angle of the camshaft of the internal combustion engine is too large, it will affect the correct opening and closing time of the valve, and the torsion angle of the drive shaft of the gantry crane movement mechanism will affect the synchronization of the driving wheels. For shafts with a risk of torsional vibration and shafts in the control system, a large torsional stiffness is required.
Rotor shaft, rotating shaft, precision shaft, micro shaft
Other Content
2024-01-02
Can meet your needs of a variety of materials!
WeChat Public Number
Address:
Foreign companies
Established：April 20, 1994