旋喷泵用电动机起动时间研究及应用

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中图分类号：TH311；TM343 文献标志码：A文章编号：1006-0316（2025）08-0001-06

doi：10.3969/j.issn.1006-0316.2025.08.001

Research and Application of the Starting Time for Asynchronous Motor Used in Rotary Jet Pump

LIShuangshuang1²，YINXiao³，CHENJun³，FENG Chuan³，YINGuofu1 （1.School of Mechanical Engineering， Sichuan University， Chengdu 61oo65， China; 2.School ofMechanical Engineering，Xihua University， Chengdu 61oo39，China; 3.Sinoseal Holding Co.，Ltd.， Chengdu ， China）

Abstract ： As a key component of the drag system of a rotary jet pump，the motor's starting time directly affects operational safety and lifespan of the equipment. Due to the increase in the moment of inertia of the rotary jet pump，the motor is exposed to problems such as long starting times，difficulty in starting，and the risk of exceeding the temperature rise limit.Inorder to improve the starting reliability of the motor，the differential equations ofthe motor starting time and the load moment of inertia are established，combined with the structure model of the single-axis motor drag system of the rotary jet pump，the mechanical characteristics of the motor and the load characteristics of the pump. The starting time is solved by using a discrete segmented iteration method that combines the motor’s mechanical characteristics with the torque characteristics of the pump load. Theresults show that the moment of inertia is linearly proportional to the starting time.Taking the

YBX4-200L1-2WF2/30 kW motor for RP5010S rotary jet pump （with a moment of inertia of 3.942kg⋅m2 asan example，the speed-time relationship during direct motor starting under closed-valve conditions was analyzed by the graphical method，and the starting time was obtained as 7.81s， ，which met the engineering design requirements.These findings provide a theoretical basis for motorselectionand start-up performance verification of high-head rotary jet pumps with a large moment of inertia.

Key words ∵ rotary jet pump i asynchronous motor ; torque characteristic ; moment of inertia ; starting time ; graphical method

旋喷泵作为一种极低比转速泵，其结构与工作原理独特，通过皮托管原理避免了传统泵的圆盘摩擦损失，突破了传统结构部件的束缚。（剩余5642字）