Abstract:The temperature field of a Yring used in 20 t excavator bucket cylinder was studied in a reciprocation cycle under different heat sources by using finite element analysis software ANSYS.The impact of various factors (including medium pressure,reciprocating speed,medium temperature,and etc.) on the temperature field of the Yring was analyzed by using control variable method.The results show that the maximum temperature occurs in the lips of Yring when only considering the friction heat,the maximum temperature occurs in the thicker part of Yring bottom part when only considering the mechanical hysteresis heat,and under certain ambient temperature,the effect of friction heat on the maximum temperature of Yring is larger than that of mechanical hysteresis heat.As compared to the effect of medium pressure,the effect of reciprocating movement speed of the piston rod is more significant to the maximum temperature of the Yring.When only considering the mechanical hysteresis heat,the maximum temperature of Yring is largely influenced by oil temperature,and less influenced by medium pressure and reciprocating movement speed.