As an advanced downhole instrument in drilling engineering, drilling fluid continuous wave generator (DFCWG) has great application prospects. The large load torque is one of the key problems that hinder the development of DFCWG. In this paper, based on the design theory of rotary valve and finite element method, the structure of rotary valve is designed and the load torque characteristics is analyzed and points out that the load torque has strong alternating characteristics. It is pointed out that the load torque has the characteristics of strong alternating. According to the characteristics of the load torque, the "fluid-magnetic" collaborative compensation method is proposed. The load compensation turbine and magnetic compensation device are used to compensate the DC and AC components of the load torque respectively, and the load compensation device is designed. The rationality of the design of the load compensation device is verified by simulation. Finally, the comprehensive compensation effect is analyzed by the finite element method. According to the analysis results, the "fluid-magnetic" collaborative compensation method can effectively reduce the load torque. The research results can provide technical support for DFCWG design.

作为钻井工程中的一种先进的井下仪器，钻井液连续波发生器（DFCWG）具有广阔的应用前景。大的负载扭矩是阻碍DFCWG发展的关键问题之一。本文基于旋转阀的设计原理和有限元方法，设计了旋转阀的结构，分析了负载转矩特性，指出负载转矩具有很强的交变特性。要指出的是，负载转矩具有强交变的特性。根据负载转矩的特点，提出了“液磁”协同补偿方法。负载补偿涡轮和磁补偿装置分别用于补偿负载转矩的直流分量和交流分量，并设计了负载补偿装置。通过仿真验证了负载补偿装置设计的合理性。最后，通过有限元方法对综合补偿效果进行了分析。根据分析结果，“液磁”协同补偿方法可以有效降低负载转矩。研究结果可为DFCWG设计提供技术支持。