A shaft is a mechanical part that supports a rotating part and rotates therewith to transmit motion, torque or bending moments. Generally, it is a metal rod shape, and each segment can have a different diameter. The parts of the machine that make a swivel motion are mounted on the shaft. For instance, the shaft is an crucial part of centrifugal pumps.
The structural design of the shaft is an important step to determine the shape of the shaft and the overall structural dimensions. It consists of the type, size and position of the part mounted on the shaft, the way the part is fixed, the nature, direction, size and distribution of the load, the type and size of the bearing, the blank of the shaft, the manufacturing and assembly process, the installation and transport, the shaft The deformation and other factors are related.
The designer can design according to the specific requirements of the shaft. If necessary, several schemes can be compared to select the design scheme. The following are the general shaft structure design principles:
1. Save materials, reduce weight, and use cross-sectional shapes of equal strength or large section coefficients.
2. It is easy to accurately position, stabilize, assemble, disassemble and adjust the parts on the shaft.
3. Adopt various structural measures to reduce stress concentration and increase strength.
4. Easy to manufacture and ensure accuracy.
