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分析φ240型涡轮钻具的试验效率曲线表明，涡轮中的能量损失主要是水力损失。水力损失包括叶型损失、冲击损失和瑞壁损失等。为了减少和预防各种能量损失，应合理选择涡轮叶栅的相对节距、定转子的径向间隙和轴向间隙：叶栅相对节距（叶栅节距与叶型弦长之比）应为0．65－075；定转子径向间隙应为1mm；轴向间隙应为14－16mm。同时还应使涡轮在最佳工况下工作，并采用先扩张后收缩的叶片通道。铸造涡轮时，应尽量使叶片表面光滑。
Analysis of the φ240-type turbine drill test efficiency curve shows that the energy loss in the turbine is mainly a hydraulic loss. Hydraulic losses include loss of vanes, loss of impact and loss of Rebalance. In order to reduce and prevent various energy losses, the relative pitch of the turbine cascade, the radial clearance of the stator and the axial clearance should be selected reasonably: the relative pitch of cascade (the ratio of cascade pitch to leaf chord) 0.65-075; stator radial clearance should be 1mm; axial clearance should be 14-16mm. Turbine should also work under the best conditions, and the expansion of the first contraction of the leaf channel. Casting the turbine, the blade surface should be as smooth as possible.