SU1161836A1 - Device for monitoring vibration of multirotor turbomachine - Google Patents

Abstract

DEVICE FOR CONTROL OF VIBRATION OF A MULTI-ROTARY TURBINE MACHINE containing a series-connected vibration converter, input shaper. a quadrature synchronous detector, a digital averaging unit and an information output unit, rotational speed sensors, a reference channel and a clock frequency generator, speed sensors and a clock frequency generator are connected to the control inputs of the reference channel and, through the output divider, to a quadratic synchronous detector, distinguished by that, in order to expand the range, control, it is equipped with an adder and additional reference channels, the inputs of which are under the speed sensor, and the outputs of the reference channels of the adder are connected to the output nym dehshtelem.

Description

The invention relates to a measurement technique and can be used to monitor the technical state of a turbomayin. A known device for controlling vibration of a multi-rotor turbomachine, containing sequentially connected vibration transducer, input driver, quadrature synchronous detector, digital averaging unit and information output unit, speed sensors, reference channel and clock generator, speed sensors and clock generator are connected to control inputs the reference channel and through the output divider to the quadrature synchronous detector D. The disadvantage of this device is the inability to determine the combination nnyh constituting VIB turbomachine radio spectrum due to the large Num la constituting the set of multiple frequencies. The purpose of the invention is to expand the range of control by taking into account the components of the vibration spectrum at multiple frequencies. This goal is achieved by the 4TO device controlling the vibration of a multi-turbomachine, containing a series-connected vibration transducer, an input driver, a quadrature synchronous detector, a digital averaging unit and an information output unit, sensors., Frequency reference channel and clock generator, speed sensors and clock generator. connected to the control inputs of the reference channel and through the output divider to the quadrature synchronous detector, equipped with an adder and additional reference channels whose inputs are connected to the speed sensor, and the outputs of the reference channels through the adder connected to the output divider. The drawing shows the block diagram of the device. The device for controlling the vibration of a turbomachine comprises a vibration transducer 1 connected in series, an input driver 2, a quadrature synchronous detector 3, a digital averaging unit 4 and an information output unit 5, speed sensors 6 and 7, a main reference channel (not shown) and a clock frequency generator 8, , sensors 6 and 7 revolutions and a clock frequency generator 8 are connected to the control input of the reference channel and through the output divider 9 to the quadrature synchronous detector 3. The device is additionally equipped with an adder 10 and additional support channels 11 and 12, the inputs of which are connected to sensors 6 and 7 turns, and the outputs of support kangshov 11 and 12 are connected to output divider 9 through adder 10. The device works in the following way. The signal with combinational components of the vibrational spectrum, with frequencies equal to, where f and f are the rotational frequencies of the corresponding rotors of the tour boombannas, i, and 2,3 ... are the numbers that determine the corresponding combinational component of the spectrum, passes into the reference channels 11 and 12 with multipliers i and ig. On the adder 10, a + or - sign is specified in accordance with the above expression to determine the corresponding combination component. Vibrating transducer 1 converts the vibration V (t) of the turbomachine body into an electrical signal, which through the input driver 2 enters the quadrature synchronous detector 3. The latter extracts from the input signal the amplitude of the spectral component, whose frequency is determined by the frequency of the reference signal. The value of the extracted amplitude is averaged in block 4 of the digital averaging and goes to block 5 of the output of the information. The frequency of the reference signal supplied to the quadrature synchronous detector 3 must be equal to the frequency of the selected combinational component f, the formation of which is carried out as follows. The sensors 6 and 7 turns convert the rotational speed of the corresponding

3, 11618364

rotor turbomachine in electrically quasi-sinusoidal signal, partial signals. Support channels 8 and 9 of which are equal to the frequency selected

multiply the frequency of these signal-combinational components.

fishing for given coefficients i and Ij. The signal received is used in

The results of multiplying in digital code the quality of the reference in the quadrature sync are sent to the adder 10, which is synchronous. detector 3.

performs summation or subtraction. The invention provides extensibility signals and represents the range of the control of the vibration mode in the digital code on the output spectrum, the accuracy of

divider-.9. The latter is shared with fO control, cost reduction, and expense.

generator 8 clock frequency pre-fuel by reducing the time

forms the code of the sum of frequency control.

Claims (1)

VIBRATION CONTROL DEVICE OF A MULTI-TURBO TURBO MACHINE, containing a serially connected vibration transducer, an input driver, a quadrature synchronous detector, a digital averaging unit and an information output unit, revolution sensors, a reference channel and a clock generator, speed sensors and a clock generator are connected to the control inputs of the reference channel and through output divider - to quadra—. synchronous detector, characterized in that, in order to expand the control range, it is equipped with an adder and additional reference channels, the inputs of which are connected to revolution sensors, and the outputs of the reference channels are connected to the output divider g through the adder. I. ”1161836> 1 1161836 2