采煤机摇臂水道结构对换热效果的影响分析

Analysis of Influence of Water Channel Structure of Shearer Rocker Arm on Heat Transfer Effect

为研究采煤机摇臂冷却水道结构对散热效率的影响,提高采煤机摇臂冷却水道的散热效率,通过Fluent数值计算方法对不同结构冷却水道的温度场、压力场进行数值分析。结果表明:随着流速增加,Nu随之增加,对流换热效率提高;波高会增加流体扰动强化换热效果,同时转角流动死区也会降低换热效果,在h=15 mm换热效率最佳;波间距越小,水道转角数量越多,增大压降,但流道长度增加,流体携带的热量会增加。

In order to study the influence of the cooling water channel structure of the shearer rocker arm on the heat dissipation efficiency and improve the heat dissipation efficiency of the cooling water channel of the shearer rocker arm.The temperature field and pressure field of different structures of cooling water channel were analyzed by Fluent numerical method.The results show that with the increase of flow velocity,Nu increases and the convective heat transfer efficiency increases;wave height increases the effect of fluid disturbance on enhancing heat transfer,and the dead zone of corner flow also reduces the heat transfer effect,which is the best at weve height h=15 mm;the smaller the wave spacing is,the more the number of corners of water channel increases and the pressure drop increases,but the longer the flow channel,the more heat the fluid carries.