Tips for using mechanical shafts mainly include the following aspects:
Bearing clearance adjustment: The bearing clearance adjustment methods for different mechanical equipment are different. For example, the inner ring clearance adjustment of the tapered roller bearing in the front wheel hub of a car is usually fixed with a crown nut with a cotter pin, a winged washer and a stop washer, and the back nut is avoided to lock the journal nut to ensure that the support has a moderate pre-interference. The clearance adjustment of the cylindrical roller bearing and thrust ball bearing in the lathe spindle should pay attention to the increase in working temperature as the clearance decreases, and the best balance between clearance and temperature should be found.
Axial positioning method: Common axial positioning methods include shoulder or shaft ring positioning method, elastic retaining ring positioning method, sleeve positioning method, shaft end baffle positioning method, cone surface positioning method, round nut positioning method, set screw positioning method, locking retaining ring positioning method and expansion sleeve positioning method. Each method has its specific application scenarios and advantages and disadvantages. For example, the shoulder or collar positioning method is simple and reliable, and can withstand large axial forces, but may cause stress concentration; the elastic ring positioning method has a compact structure and is easy to disassemble and assemble, but the force is small.
The difference between the bearing seat and the guide shaft support: the bearing seat is mainly used to support and fix the bearing, reduce vibration and displacement, and ensure the stable operation of the bearing; while the guide shaft support provides precise guidance and support for the linear motion axis, reduces deviation and vibration, and improves motion accuracy. The bearing seat is suitable for various rotating machinery, while the guide shaft support is mainly used for linear motion machinery, such as CNC machine tools and automation equipment.
