Review: Rotor Balancing

Foiles, William C.; Allaire, Paul E.; Gunter, E. J.

doi:10.1155/1998/648518

Cited by 91 publications

(42 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These corrective masses are placed such that their radial and angular locations eliminate the effect of imbalance on all the vibration modes within the relevant speed range. These corrective masses are computed solely from measured vibrations during operation in a so called "balancing process" [3][4][5][6]. High speed rotors are usually balanced using either the "Influence Coefficient Method", "Modal Balancing" or the "Unified Balancing Approach" [3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…These corrective masses are computed solely from measured vibrations during operation in a so called "balancing process" [3][4][5][6]. High speed rotors are usually balanced using either the "Influence Coefficient Method", "Modal Balancing" or the "Unified Balancing Approach" [3][4][5][6][7][8][9][10][11]. The calculation of the correction masses using the aforementioned procedures is based on measuring the imbalance response close to critical speeds, where the vibration levels and sensitivity are sufficiently high.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic balancing of super-critical rotating structures using slow-speed data via parametric excitation

Tresser

Dolev

Bucher

2018

Journal of Sound and Vibration

View full text Add to dashboard Cite

High-speed machinery is often designed to pass several "critical speeds", where vibration levels can be very high. To reduce vibrations, rotors usually undergo a mass balancing process, where the machine is rotated at its full speed range, during which the dynamic response near critical speeds can be measured. High sensitivity, which is required for a successful balancing process, is achieved near the critical speeds, where a single deflection mode shape becomes dominant, and is excited by the projection of the imbalance on it. The requirement to rotate the machine at high speeds is an obstacle in many cases, where it is impossible to perform measurements at high speeds, due to harsh conditions such as high temperatures and inaccessibility (e.g., jet engines). This paper proposes a novel balancing method of flexible rotors, which does not require the machine to be rotated at high speeds. With this method, the rotor is spun at low speeds, while subjecting it to a set of externally controlled forces. The external forces comprise a set of tuned, response dependent, parametric excitations, and nonlinear stiffness terms. The parametric excitation can isolate any desired mode, while keeping the response directly linked to the imbalance. A software controlled nonlinear stiffness term limits the response, hence preventing the rotor to become unstable. These forces warrant sufficient sensitivity required to detect the projection of the imbalance on any desired mode without rotating the machine at high speeds. Analytical, numerical and experimental results are shown to validate and demonstrate the method.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic balancing of super-critical rotating structures using slow-speed data via parametric excitation

Tresser

Dolev

Bucher

2018

Journal of Sound and Vibration

View full text Add to dashboard Cite

show abstract

“…Como el empleado por Zhou y Shi [11] y Foiles [12], quienes han postulado diversos métodos para balanceo de rotores, aplicando técnicas holoespectrales [13], y métodos de optimización con algoritmos genéticos para reducir las vibraciones del desbalanceo [14]. Otros desarrollos para balancear apuntan al empleo de instrumentos virtuales, soportes del proceso, basados en el método de coeficientes de influencia [1], e incluso técnicas para balanceo de rotores acoplados directamente a un motor de inducción utilizando la corriente residual [15], o empleando el método modal [16].…”

Section: Introductionunclassified

Metodología para el balanceo de rotores empleando un analizador de vibraciones

Acevedo¹,

A²,

A.³

2018

revuin

View full text Add to dashboard Cite

“…So it's very important for the economy and national security. Balancing a turbine rotor is a vital step to ensure that the machine will operate reliably and safely [1]. If turbine rotor occurs imbalance, it will cause the vibration of rotor.…”

Section: Introductionmentioning

confidence: 99%

Turbine rotor dynamic balance vibration measurement based on the non-contact optical fiber grating sensing

Tan

Zhou

et al. 2015

IEICE Electron. Express

View full text Add to dashboard Cite

This paper has presented a non-contact vibration sensor based on fiber Bragg grating (FBG) sensing, and applied to measure vibration of turbine rotor dynamic balance platform. The principle of the sensor has been introduced; it's based on magnetic coupling principle and the FBG sensing to obtain the vibration. The sensors calibration experiments show that: sensitivity of 1 st sensor in range of 3.00-3.80 mm is −449.83 pm/mm, linearity is 5.19%; sensitivity of 2 nd sensor in range of 4.00-5.00 mm is −430.95 pm/ mm, linearity is 3.31%. In addition, turbine rotor dynamic vibration detection system based on eddy current displacement sensor and non-contact FBG vibration sensor have set; and contrast analysis of experiments data shows that: the vibration signal analysis of non-contact FBG vibration sensor is basically the same as the result of eddy current displacement sensor. It verified that the sensor can be used for non-contact measurement of turbine rotor dynamic balance vibration.

show abstract

Review: Rotor Balancing

Cited by 91 publications

References 77 publications

Dynamic balancing of super-critical rotating structures using slow-speed data via parametric excitation

Dynamic balancing of super-critical rotating structures using slow-speed data via parametric excitation

Metodología para el balanceo de rotores empleando un analizador de vibraciones

Turbine rotor dynamic balance vibration measurement based on the non-contact optical fiber grating sensing

Contact Info

Product

Resources

About