The figure shows torque T=10 N_m for four different lubrication states and oil viscosity 0=0.033At Pa_s, the distribution cloud of the tooth contact temperature on the plane of rotational speed and tooth side clearance parameter is shown.
It can be seen from the diagram that under four different lubrication conditions under the same condition, the variation rule of speed and clearance coupling on tooth surface contact temperature is similar, only the change of tooth surface contact temperature under elastohydrodynamic lubrication is analyzed.It can be seen from Figure 8(a) that in the low speed area, the contact temperature of the tooth surface increases obviously with the increase of rotational speed, while it increases slightly when n is more than 1000 r/min.The contact temperature of tooth surface increases with the increase of rotational speed because the heat generated by friction of tooth surface increases with the increase of rotational speed. Under the same heat dissipation condition, the contact temperature of tooth surface increases significantly.At the same time, it can be seen that the contact temperature of the tooth surface increases with the increase of the backlash on the tooth side, but the increase is not significant.Therefore, the speed has a much greater influence on the contact temperature of the tooth surface than the tooth side gap, and the coupling between the speed and the tooth side gap is weak.In actual operating conditions, in order to avoid the occurrence of tooth surface gluing, the gear speed should not be too high and the tooth side clearance should not be too large or too small.