Study on welding technology of abrasive surface of journal of presser roll shaft;

The film pressure,film temperature,load-carrying capacity,end leakage flow-rate,frictional coefficient and misalignment moment of a journal bearing with different journal misalignment angle and surface roughness are calculated based on generalized Reynolds equation,three-dimension energy equation and solid heat conduction equation etc,considering thermal effect.

This paper analyzes the causes of the damage on the journal of the Y4-73-02No.

A set of measurement system for bearing and axle journal on passenger car has been developed to fulfill the work of measuring the dimension,data saving,communication and data management,which overcomes disadvantage of manual measurement,such as low efficiencies,high cost,high labor intensity and low precision.

In the system, the thought of differential measurement mode and automatic on-line alignment are applied, so as to make the fully automatic non-contact measurement of the train wheel-set journal diameter, dust guard seat diameter and axle journal length.