On proposing a non-intrusive device and methodology to monitor motor degradation

Kuhn, Henrique Cafruni; Righi, Rodrigo da Rosa; Crovato, César David Paredes

doi:10.1016/j.jksues.2021.04.007

Cited by 2 publications

(7 citation statements)

References 26 publications

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“…Eqs. (9)(10) show that the best conditions for lubricating the TCR bearing and removing excess temperature are provided when an external independent lubrication system operates for at least a minute.…”

Section: Methodsmentioning

confidence: 99%

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Studying the Temperature Characteristics of Oil at the Outlet From the K27-145 Turbocharger Rotor Bearing

Гриценко¹,

Shepelev²,

Kaliyev³

2022

Tribol. Ind.

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Turbocharging is a promising solution for increasing the specific power of motor-and-tractor equipment, which allows increasing power up to 50%. At the same time, a significant growth of speed, load, and temperature modes leads to a significant increase in the number of failures and a decrease in reliability by 2-3 times. Theoretical and experimental studies established that the temperature of the bearing and oil at the turbocharger drain changes under the influence of the inlet oil temperature to the TCR bearing, the TCR rotor shaft speed, and the change in the oil pressure at the input to the TCR bearing. This allows setting the limits of the TCR bearing performance in extreme operating conditions. The installation of an autonomous TCR lubricating and braking device maintains the required reliability level and increases failure-free operation. The hydraulic accumulator installed in the lubrication system of the engine turbocharger regulars lubricates and cools the rotor bearings when the ICE crankshaft speed drops. The incorporation of a braking device reduces the rundown time of the rotor and thereby prevents oil starvation and dry friction of the rotor bearing. The combined use of the hydraulic accumulator and the braking device minimizes the risk of dry friction and accidental failure of the turbocharger. We proved that the braking device of the TCR rotor built into the intake system of an ICE with the calculated design parameters reduces the rotor rundown time by 30-35%. This reduces the dimensions and operating time of the hydraulic accumulator and simultaneously eliminates surges in the compressor section of the TCR and any breakage of its parts. In these conditions, it is relevant to develop independent systems to lubricate the TCR bearings and replenish them using built-in hydraulic accumulators during start-up, significant loads at minimum crankshaft speeds, and engine stalling.

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Section: Methodsmentioning

confidence: 99%

“…Turbocharger lifetimes are significantly shorter than engine lifetimes, they require high quality engine oil and a defective TCR can damage the engine itself [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Studying the Temperature Characteristics of Oil at the Outlet From the K27-145 Turbocharger Rotor Bearing

Гриценко¹,

Shepelev²,

Kaliyev³

2022

Tribol. Ind.

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“…The signals taken into account when monitoring the condition of motors are among the most diverse. The valuable motor output signals provided by the motor and suitable for condition monitoring are acquired by means of appropriate sensors placed on the motor or on its rotor (most frequently vibration sensors [1][2][3][4][5][6][7][8][9][10][11][12], temperature sensors [2][3][4][5][6]10,[13][14][15][16][17][18], instantaneous rotation speed sensors [6,9,14,16,[18][19][20][21] acoustic sensors [5,8,11,12,14], and rarely magnetic field and flux sensors [20,22,23] or stray-flux sensors [6,24]).…”

Section: Introductionmentioning

confidence: 99%

“…The valuable motor input signals are often acquired from the electrical supply system using appropriate instantaneous voltage and current sensors. The most commonly used input signal in motor condition monitoring is the description of the absorbed current (e. g. by Motor Current Signature Analysis, MCSA [13]) which has been widely used in scientific research [2,4,[6][7][8][9]11,12,14,15,17,18,20,[24][25][26][27][28][29][30][31][32][33][34][35]. The use of voltage sensors is indirect and rarely used on its own, e. g. in unbalancing detection of an AC power supply and overvoltage detection [26], detection of broken bars in stator [13], to prevent the phase-loss [36] or to describe voltage waveform anomalies [2]).…”

mentioning

confidence: 99%

“…The use of voltage sensors is indirect and rarely used on its own, e. g. in unbalancing detection of an AC power supply and overvoltage detection [26], detection of broken bars in stator [13], to prevent the phase-loss [36] or to describe voltage waveform anomalies [2]). Otherwise, voltage sensors are almost always combined with the use of current sensors to provide other useful information and signals for monitoring, such as the description of the absorbed instantaneous electrical power or active electrical power [13,19,25,34], as the subject of our previous research [21], the detection of the phase or phase shift of the instantaneous current [30,33,37], or the description of the evolution of the power factor [6,13,17].…”

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confidence: 99%

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Condition Monitoring of a Three-phase AC Asynchronous Motor based on the Analysis of the Instantaneous Active Electrical Power in No-Load Tests

Chitariu,

Horodinca,

Mihai

et al. 2024

Preprint

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This paper experimentally reveals some of the resources offered by the evolution of the instantaneous active electric power in describing the state of three-phase AC induction asynchronous electric motors (with squirrel-cage rotor) operating under no-load conditions. A mechanical power is required to rotate the rotor at no-load and this mechanical power is satisfactorily reflected in the constant and variable part of instantaneous active electric power. The variable part of this electrical power should necessarily have a periodic component with the same period as the period of rotation of the rotor. The paper proposes a procedure for extracting this periodic component description (as a pattern, by means of a selective averaging of instantaneous active electrical power) and analysis. The time origin of this pattern is defined by the time of a selected first passage through the origin of an angular marker placed on the rotor, detectable by a proximity sensor (e.g. a laser sensor). The usefulness of the pattern in describing the state of the motor rotor has been demonstrated by several simple experiments which show that a slight change in the no-load running conditions of the motor (e.g. by placing a dynamically unbalanced mass on the rotor) has clear effects in changing the shape of the pattern.

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On proposing a non-intrusive device and methodology to monitor motor degradation

Cited by 2 publications

References 26 publications

Studying the Temperature Characteristics of Oil at the Outlet From the K27-145 Turbocharger Rotor Bearing

Studying the Temperature Characteristics of Oil at the Outlet From the K27-145 Turbocharger Rotor Bearing

Condition Monitoring of a Three-phase AC Asynchronous Motor based on the Analysis of the Instantaneous Active Electrical Power in No-Load Tests

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