SU446768A1 - Method for determining parameters of resonant oscillations of rotor blades of a turbomachine - Google Patents
Method for determining parameters of resonant oscillations of rotor blades of a turbomachineInfo
- Publication number
- SU446768A1 SU446768A1 SU1291349A SU1291349A SU446768A1 SU 446768 A1 SU446768 A1 SU 446768A1 SU 1291349 A SU1291349 A SU 1291349A SU 1291349 A SU1291349 A SU 1291349A SU 446768 A1 SU446768 A1 SU 446768A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- turbomachine
- rotor blades
- determining parameters
- resonant oscillations
- blades
- Prior art date
Links
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Изобретение относитс к областиизмерени параметров движени . Известные способы определени параметров резонансных колебаний лопаток ротора турбомашины путем измерени отклонений концов лопаток от нейтрального положени в моменты их прохождени относительно неподвижной точки окрумшости кор пуса позвол ют проводить измерени в процессе работы только .в моменты изменени скорости врашени . Из-за зтого известными способами нельз определить параметры колебаний лопаток роторов большого класса компрессоров и турбин, имеющих строго посто нную скорость вращени . Дл определени параметров при неизменной скорости вращени ротора измерение отклонений концов каждои из лопаток провод т в трех точках и по ним определ ют амплитуду и частоту колебаний соответствующей лопатки. Изобретение по сн етс чертеЖОМ , на котором графически представлено изменение отклонени от нейтрального положени одной из лопаток при частоте колебаний, например , в два раза превышающей оборотную частоту вращени ротора.Значками обозначены места измерени мгновенных отклонений лопаток измерени с помощью прибора ЭЛУРА - места установки пар датчиков). При резонансных колебани х кажда лопатка совершает целое число колебаний за полный оборот ротора и к фиксированной точке корпуса приходит всегда строго в одной и той же фазе, т.е. с одним и тем же отклонением от нейтрального положени . Дл определени параметров колебаний необходимо провести измерени в трех точках по окружности над лопатками ротора. Дл зтого датчики, например, прибора ЭЛУРА располагают в одной плоскости вращени со сдвигом одинThis invention relates to the field of motion measurement. The known methods for determining the parameters of the resonant oscillations of the rotor blades of a turbomachine by measuring the deviations of the ends of the blades from the neutral position at the moments of their passage relative to a fixed point of the circumference of the housing allow measurements to be carried out during operation only at the moments of change of the speed of traction. Because of this, it is not possible to determine oscillation parameters of rotor blades of a large class of compressors and turbines with strictly constant rotational speed by known methods. To determine the parameters at a constant speed of rotation of the rotor, measurements of the end deviations of each of the blades are carried out at three points, and the amplitude and frequency of oscillations of the corresponding blade are determined from them. The invention is illustrated in FIG. 2, which graphically shows the change in deviation from the neutral position of one of the blades at an oscillation frequency, for example, twice the rotational frequency of the rotor rotation. Signs indicate where the instant deviations of the measurement blades were measured using the ELURA device — the place where the sensor pairs are installed ). With resonant oscillations, each blade makes an integer number of oscillations per full rotation of the rotor and always comes to a fixed point of the body strictly in the same phase, i.e. with the same deviation from the neutral position. To determine the vibration parameters, it is necessary to measure at three points around the circumference of the rotor blades. For this reason, the sensors, for example, the device ELURA are placed in one plane of rotation with a shift of one
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1291349A SU446768A1 (en) | 1968-12-18 | 1968-12-18 | Method for determining parameters of resonant oscillations of rotor blades of a turbomachine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1291349A SU446768A1 (en) | 1968-12-18 | 1968-12-18 | Method for determining parameters of resonant oscillations of rotor blades of a turbomachine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU446768A1 true SU446768A1 (en) | 1974-10-15 |
Family
ID=20444105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1291349A SU446768A1 (en) | 1968-12-18 | 1968-12-18 | Method for determining parameters of resonant oscillations of rotor blades of a turbomachine |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU446768A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871827A (en) * | 2018-05-30 | 2018-11-23 | 西安陕鼓动力股份有限公司 | A method of based on the quick diagnosis rotating machinery resonance for intersecting statistical analysis |
-
1968
- 1968-12-18 SU SU1291349A patent/SU446768A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871827A (en) * | 2018-05-30 | 2018-11-23 | 西安陕鼓动力股份有限公司 | A method of based on the quick diagnosis rotating machinery resonance for intersecting statistical analysis |
| CN108871827B (en) * | 2018-05-30 | 2020-01-14 | 西安陕鼓动力股份有限公司 | Method for rapidly diagnosing rotary machine resonance based on cross statistical analysis |
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