SU857728A1 - Turbine blade dynamic oscillation amplitude determination method - Google Patents
Turbine blade dynamic oscillation amplitude determination method Download PDFInfo
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- SU857728A1 SU857728A1 SU782588124A SU2588124A SU857728A1 SU 857728 A1 SU857728 A1 SU 857728A1 SU 782588124 A SU782588124 A SU 782588124A SU 2588124 A SU2588124 A SU 2588124A SU 857728 A1 SU857728 A1 SU 857728A1
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- USSR - Soviet Union
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- blade
- sensors
- time
- oscillations
- rotation
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
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Изобретение относитс к области газотурбостроени и может быть использовано дл бесконтактного измерени колебаний лопаток турбомашин.The invention relates to the field of gas turbines and can be used for contactless measurement of oscillations of turbomachine blades.
Известен способ определени амплитуды динамических колебаний лопаток турбомашины с помощью неподвижных датчиков по отклонению периферийной части лопаток от нейтрального положени в момент прохождени ею одного из датчиков.A known method for determining the amplitude of dynamic oscillations of turbomachine blades using fixed sensors by the deviation of the peripheral part of the blades from the neutral position at the time it passes one of the sensors.
Способ заключаетс в том, что дл определени параметров колебаний лопаток при неизменной скорости вращени ротора, датчики устанавливгиот в рдноЯ плоскости вращени в трех точках по окружности над лопатками ротора со сдвигом один относительно другого на некотор лй известный геометрический угол, измер ют отклонение конца лопатки в каждой из трех точек и, реша систему трех уравнений , определ ют значение амплитуды колебаний каждой из лопаток 1.The method consists in that, in order to determine the parameters of the oscillations of the blades at a constant rotor speed, the sensors in a fixed plane of rotation at three points circumferentially above the blades of the rotor are offset from each other by some known geometric angle, measure the deviation of the blade end in each from three points and, solving a system of three equations, determine the value of the amplitude of oscillations of each of the blades 1.
Недостатке известного способа вл етс необходимость решени систеНал уравнений, что усложн ет обработ-; ку полученных данных и не обеспечивает достаточной точности определеВи амплитуды колебаний лопаток.The disadvantage of this method is the need to solve the system of equations, which complicates the processing; the obtained data does not provide sufficient accuracy for determining the amplitude of oscillations of the blades.
Цель изобретени - повышение точности определени амплитуды колебаний лопаток путем исключени вли ни неравномерности шага лопаток и изменени , частота вращени .The purpose of the invention is to improve the accuracy of determining the amplitude of oscillations of the blades by eliminating the influence of the non-uniformity of the blade pitch and the change in the rotation frequency.
Поставленна цель достигаетс тем, что дополнительно измер ют фактичес кое врем прохождени лопаткой рассто ни между двум датчикгили и врем This goal is achieved by additionally measuring the actual travel time of the blade between the two sensors and the time
10 ее полного оборота, рассчитывают по последнему теоретическое врем прохождени лопаткой рассто ни между двум датчиками при отсутствии колебаний лопатки, сравнивают эталонное 10 of its full rotation, calculate from the last the theoretical time for a blade to travel the distance between two sensors in the absence of blade oscillations, compare the reference
ts У1Р&ЛЯ с фактическими и по их разности суд т об отклонении периферийной части лопатки от нейтрального положени .,ts U1R & LA with actual and by their difference judged on the deviation of the peripheral part of the blade from the neutral position.
2020
Датчики при зтом устанавливают в двух точках на корпусе турбомашины с интервалом по длине окружности, описанной над траекторией .движени периферийных участков лопаток, не The sensors, at this time, are installed at two points on the body of the turbomachine with an interval along the circumference described above the path of movement of the peripheral portions of the blades, not
5 кратным шагу лопаток.5 times the pitch of the blades.
На чертеже приведена схема расположени датчиков, позвол юща реализовать предлагаеьый способ.The drawing shows the layout of the sensors, allowing the proposed method to be implemented.
Датчики 1 и 2 устанавливают под Sensors 1 and 2 are installed under
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782588124A SU857728A1 (en) | 1978-03-09 | 1978-03-09 | Turbine blade dynamic oscillation amplitude determination method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782588124A SU857728A1 (en) | 1978-03-09 | 1978-03-09 | Turbine blade dynamic oscillation amplitude determination method |
Publications (1)
Publication Number | Publication Date |
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SU857728A1 true SU857728A1 (en) | 1981-08-23 |
Family
ID=20752548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU782588124A SU857728A1 (en) | 1978-03-09 | 1978-03-09 | Turbine blade dynamic oscillation amplitude determination method |
Country Status (1)
Country | Link |
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SU (1) | SU857728A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4790189A (en) * | 1987-03-02 | 1988-12-13 | Westinghouse Electric Corp. | Method for eliminating sensor drift in a vibration monitoring system |
-
1978
- 1978-03-09 SU SU782588124A patent/SU857728A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4790189A (en) * | 1987-03-02 | 1988-12-13 | Westinghouse Electric Corp. | Method for eliminating sensor drift in a vibration monitoring system |
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