准等壁厚螺杆钻具马达断面型线设计

摘要

分析了等壁厚螺杆钻具马达的性能优点和马达金属外壳的加工方法。针对等壁厚螺杆钻具马达金属外壳内表面存在的加工难题，提出了准等壁厚螺杆钻具马达的设计思路。阐述了准等壁厚螺杆钻具马达金属外壳断面型线的绘制方法，并给出了设计实例。试验分析了准等壁厚和等壁厚螺杆钻具马达的性能。结果表明：准等壁厚螺杆钻具马达不仅具有等壁厚螺杆钻具马达的性能优点，还解决了等壁厚螺杆钻具马达金属外壳电解加工的难题。%The performance benefits of the screw drill motor with the uniform thickness rubber bush and the processing methods of the motor metal shell were analyzed.The screw drill motor with quasi thickness rubber bush was proposed to solve the problems of processing the inner sur-face of the metal shell of the screw drill motor with the uniform thickness rubber bush.The draw-ing method of the metal shell cross section type line of the screw drill motor with quasi thickness rubber bush was elaborated and the section line designing of the screw drill motor with quasi thickness rubber bush was given.Finally,the properties of the screw drill motor with quasi thick-ness rubber bush and the screw drill motor with the uniform thickness rubber bush were analy zed.The result shows that the screw drill motor with quasi thickness rubber bush not only has the same performance advantages with the screw drill motor with the uniform thickness rubber bush but also solves the problems of the electrochemical machining of metal shell of the screw drill mo-tor with the uniform thickness rubber bush.