The figure shows the backlash Jn=0 mm and the lubricant viscosity 0=under 4 different lubrication conditions.0.033At Pa_s, a cloud diagram of the temperature distribution of the tooth contact in the plane of the rotational speed and torque parameters is presented.
It can be seen from the diagram that the contact temperature of tooth surface under dry friction is the highest under different conditions under the same working condition.This is because when the gears engage under dry friction conditions, the friction coefficient on the tooth surface is the largest, the heat generated by the friction on the tooth surface is the largest and the contact temperature on the tooth surface is the highest.At the same time, it can be seen that the variation of tooth contact temperature with speed and torque coupling under four different states is similar.Therefore, the elastohydrodynamic lubrication state is used to analyze the gear contact temperature. When the torque is low, the contact temperature on the tooth surface increases slowly with the speed increasing; when the torque is high, the contact temperature on the tooth surface increases significantly with the speed increasing and reaches the maximum value at the highest speed.Figure 5(a) also shows that the tooth contact temperature is positively correlated with rotational speed and torque; the smaller the rotational speed and torque, the lower the tooth contact temperature; and the higher the rotational speed and torque, the higher the tooth contact temperature.This means that when the speed and torque of the teeth are too high, the contact temperature of the tooth surface caused by friction is very high and it is easy to form the gluing of the tooth surface.Therefore, in actual conditions, in order to avoid the occurrence of tooth surface gluing, the speed and torque should not be too high.