Method for predicting fatigue life of rotor pigeon tail part of pumped storage power generation motor based on Corten-Dolan rule

A technology for generating electric motors and pumped water storage, which is applied in the fields of electrical digital data processing, computer-aided design, and special data processing applications, and can solve problems such as inability to reflect time changes in stress distribution

Active Publication Date: 2016-10-12
CHINA THREE GORGES UNIV
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Problems solved by technology

The existing research method is to obtain the maximum stress distribution of each working condition through static calculation, and then use it as a load for fatigue life prediction. This method can

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  • Method for predicting fatigue life of rotor pigeon tail part of pumped storage power generation motor based on Corten-Dolan rule
  • Method for predicting fatigue life of rotor pigeon tail part of pumped storage power generation motor based on Corten-Dolan rule
  • Method for predicting fatigue life of rotor pigeon tail part of pumped storage power generation motor based on Corten-Dolan rule

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Embodiment Construction

[0051] A method for predicting the fatigue life of the rotor pigeon tail of a pumped storage generator motor based on the Corten-Dolan criterion, including the following steps:

[0052] 1) According to the rotor speed curve under the actual operating conditions provided by the pumped storage power plant, the acceleration distribution is obtained as the load. Through dynamic calculation, the dove tail of the rotor of the generator motor is obtained in the power generation start-up condition, power generation shutdown condition, and electric start-up condition respectively. The distribution of the stress caused by the centrifugal force over time under the conditions of electric shutdown, load shedding and runaway conditions;

[0053] 2) The temperature change of the motor caused by the electromagnetic loss, and the resulting thermal stress and the stress caused by the centrifugal force are vector summed to obtain the total stress distribution and its maximum value at the point wh...

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Abstract

The invention discloses a method for predicting fatigue life of a rotor pigeon tail part of a pumped storage power generation motor based on a Corten-Dolan rule. The method comprises the steps of: according to rotor speed curves provided by a pumped storage power plant under different actual operation conditions, obtaining acceleration distributions as loads, and obtaining the time-varying stress distribution situations caused by centrifugal forces of the rotor pigeon tail part of a power generation motor under a power generation starting condition, a power generation shutdown condition, an electric starting condition, an electric shutdown condition, a load shedding condition and a runaway speed operating condition; according to a maximum value of total stresses under various conditions, determining a stress maximum value under occurred conditions in combination with the occurred conditions in the known running time m years, and solving the available times of the fatigue life of the rotor pigeon tail part of a motor under the single action of the conditions; according to a Corten-Dolan rule calculation formula, obtaining a life prediction coefficient in combination with the actual number of occurrence of various conditions of a power generation motor which has been run for m years; and calculating and obtaining the use period of the fatigue life of the rotor pigeon tail part of the power generation motor according to the life prediction coefficient and the year m.

Description

technical field [0001] The invention discloses a method for predicting the fatigue life of a rotor dove tail of a pumped storage power generation motor based on the Corten-Dolan criterion, and relates to the field of prediction of the fatigue life of the rotor dove tail of a pumped storage power generation motor. Background technique [0002] Pumped-storage generator motors have two main working conditions: power generation and electric power generation, with high speed, large unit capacity, frequent start and stop of the unit, and positive and negative rotation of the rotor. At the same time, with the increase of the operating life of the pumped storage power station, the faults and accidents of the generator motor occur frequently, and the safety and stability problems become increasingly prominent. [0003] At present, there are few studies on the fatigue life prediction of the rotor pigeon tail of the pumped storage generator motor. Because the generator motor has power ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/04
Inventor 张宇娇刘东圆黄雄峰徐彬昭吴刚梁
Owner CHINA THREE GORGES UNIV
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