Screw fan manufacturers of blower, vacuum pump such mechanical products, drive shaft is one of the main parts of its composition. The performance of the transmission shaft has an important impact on the mechanical quality, which performance indicators to judge it?

Mechanical drive shaft performance indicators mainly include the following aspects:

One is the speed, that is, the speed range of the drive shaft, which depends on the structure, manufacture and bearing lubrication of the drive shaft.

Second, accuracy. The running accuracy of the drive shaft includes the geometric accuracy and rotary accuracy of the spindle, which mainly depends on the machining accuracy of the main parts of the spindle, the assembly and adjustment of the shaft, and the imbalance and vibration of the spindle.

Third, the carrying capacity. Bearing capacity is the capacity of the drive shaft to bear loads in operation. It depends on the structural size of the shaft, bearing type and installation and debugging.

Fourth, stiffness. Stiffness refers to the deformation ability of the drive shaft to resist external load, that is, under the action of load, the elastic deformation of the components of the spindle (shaft, bearing, etc.). Usually this external load refers to the static external load.

Fifth, earthquake resistance. The ability of the drive shaft to resist forced vibration and self-excited vibration mainly depends on the stiffness and damping of the bearing.

Six is noise, which is particularly important for some high-speed spindles, mainly related to bearings and lubrication.

Seven is the temperature rise, the transmission shaft working temperature. Too high temperature rise will affect the working accuracy and life of the shaft, which is related to the bearing type of the drive shaft, the way of assembly and the adjustment of the bearing clearance. In serious cases, cooling measures need to be considered.

Eight is life span. This life refers to the service life for which the transmission set can maintain accuracy, rather than the usual fatigue failure, depending on the characteristics of the bearing.