Inducer, diffuser, TEM, motor, cable and bearing are the main parts of submerged cryopump for large LNG storage tanks and LNG carriers. The paper described their characteristics in detail, analyzed the key technologies such as motor cool-ing and lubrication, pump cavitation, thrust self-balancing, monitoring and protection, proposed the design essentials of such type of submerged LNG cryopump.%详细介绍了大型LNG储罐和LNG船用低温潜液泵的导流器、扩散器、TEM、电机、电缆、轴承等主要结构的特点,分析了电机冷却及润滑、泵内气蚀、推力自平衡、监测与保护等关键技术,提出了该种类型LNG低温潜液泵的设计要点.
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