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首先对液力偶合器力矩系数进行理论研究,获得液力偶合器λ_B=h(i,R_e)或λ_B=h(i,n_B)的函数关系,并进一步说明液力偶合器的力矩系数并非仅和滑差有关,而是受到滑差I_i和雷诺数Re(或者转速n_B)的共同影响。然后以J065XR型液力偶合器为例,对流场进行仿真,结合流场仿真结果,归纳总结力矩系数λ_B与转速n_B的规律,对λ_B提出一套与n_B相关的修正系数,并进行了试验验证。进一步提高了对液力偶合器特性的认识,这对提高液力偶合器的设计和控制精度具有指导作用和实用价值。
Firstly, the torque coupling coefficient of the fluid coupling is theoretically studied to get the functional relationship of the fluid coupling λ_B = h (i, R_e) or λ_B = h (i, n_B), and further shows that the torque coefficient of the fluid coupling is not only Is related to the slip, but is influenced by the slip I_i and Reynolds number Re (or speed n_B). Taking J065XR type hydraulic coupling as an example, the flow field is simulated. Based on the simulation results of flow field, the law of torque coefficient λ_B and speed n_B are summed up. A correction factor related to n_B is proposed for λ_B and tested verification. Further enhance the understanding of the characteristics of the fluid coupling, which has guidance and practical value to improve the design and control accuracy of the fluid coupling.