SU1573216A2 - Device for checking maximum deflection of rotor from axis of turbomachine - Google Patents

Abstract

The device for monitoring the maximum deviation of the rotor from the axis of the turbomachine allows for an expansion of its functionality by determining the value of the static phase of the deviation of the rotor. The signals of the contactless converters 1 and 2, corresponding to the deviation of the rotor 3 through the quadrants 4 and 5, the adder 6 and the root extraction unit 7, are fed to the input of the peak detector 8, which extracts the maximum deviation of the rotor 3, the signal from which is recorded by the recorder 9 and through the threshold unit 10 with the normalizing unit 11 turns on the detector 12. Pulses from the peak detector 8 through the pulse shaper 15 open analog switches 13 and 14, the signals of which through peak voltmeters 16 and 17 and multipliers 18 and 19 arrive at the adder 21 and its output through the phase meter to the recorder 23, on which the static phase of the rotor 3 position is fixed. Signals from the outputs of the sine-cosine oscillator 20 are supplied to the second inputs of the multipliers 18 and 19 and the phase meter 22. Such an embodiment of the device allows determining the value of the static and dynamic rotor deflection. 1 il.

Description

The invention relates to a power system, can be used to control the position of the rotor during the launch and operation of the turbomachine and is an improvement on the device auth.St. No. 1079859.

The purpose of the invention is to expand the ⁴ functional capabilities of the device by determining the value of the static phase of the rotor deviation.

The drawing shows a block diagram of the device.

The device contains two primary transducers 1 and 2, 'installed 1 near the rotor 3 in the same radial plane on mutually perpendicular axes, connected via quadrants 4 and 5 with adder 6, the output of which is connected via a series-; However, the root extraction unit 7 and the peak detector 8 with the recorder 9 and the threshold block 10 are turned on. control inputs connected to the driver of the 15 pulses.

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In addition, the device contains the first and second analog switches 13 and 14, shaper 15 pulses, the first and second peak voltmeters 16 and 17, the first and second multipliers 18 and 19, the reference sine-cosine oscillator 20, the second adder 21, the meter 22 phase and the second recorder 23, the first inputs of the first and second analog keys. 13 and 14 are connected to the outputs of the first and second primary converters 1 and 2, respectively, their second inputs to the output of the pulse shaper 15, whose input is connected to the output of the peak detector 8, and their outputs to the inputs of the first and second peak voltmeters, respectively, whose outputs connected to the inputs, respectively, of the first and second multipliers 18 and 19, the outputs of which are connected to the inputs of the second adder 21, the output of the latter connected via a phase meter 22 to the input of the second recorder 23. The first output of the reference sine-sinusine second oscillator 20 is connected to the second input of the second multiplier 19, and its second output to

The second input of the first front knives of the body is 18 and the second input of the phase meter 22.

5 The device operates as follows.

From contactless transducers 1 and 2 (for example, eddy current type) signals containing instantaneous values of θ, corresponding to the deviation of the rotor 3, are sent to the corresponding quadrants, 4 and 5, from which the squares of these values are transmitted 'to the adder 6. From the last output signal 15 The root extraction unit 7, and from the last output signal, containing the modules of the instantaneous values of the rotor deviation, goes to the peak detector 8, which identifies the maximum deviation. This signal is fed to the recorder 9. and the threshold unit 10, which, in the event of a signal being exceeded above the level specified by the normalizing unit 11, turns on the signalizer 25. “Which receive short (compared to the rotor rotation period 3 turbomagines) rectangular pulses from the output of the peak detector 8 through the driver 15 pulses, B the moment of maximum rotor deviation of the turbomagino keys 13 and 14 open for a short Time and is passed the current values of signals from the transducers 1 and 2, which are measured by peak voltmeters 16 and 17 and multiplying by multipliers 18 and 19 respectively to the sine and cosine signals of the oscillator 20 are fed to adder 21 ,.

From the output of the adder 21, a signal of 45 is given to one of the inputs of the meter 22 phase. The phase measured with respect to the sinusoidal signal of the oscillator 20, ’· is proportional to the static phase of the rotor position at the distant point of the slide bearing. The recorder 23 records the value of this signal.

The proposed device allows in the process of measuring and processing 55 signals from the transducers to obtain the value of static, dynamic, as well as the sum of static and dynamic deviations of the rotor from the axis of the turbomachine, as well as determine the phase

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specified deviation with respect to the installed orthogonal primary transducers. To take into account the static deviation of the rotor, it is necessary to “open” the outputs of the primary converters, that is, together with a variable component proportional to the deviation (vibration), submit a constant pressure condition for processing.

Claim

Maxi-15 control device

the maximum deviation of the rotor from the axis of the turbomachine on auth.St. No. 1079859, characterized in that, in order to extend the functionality by determining the value of the static phase of the rotor deviation, it further comprises the first and second analog switches, the pulse shaper, the first and second peak voltmeters, the first and second 25

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the multiplier multipliers, the reference sine-sinus oscillator, the second adder, the phase meter and the second recorder, the first inputs of the first and second analog switches are connected to the outputs of the first and second primary converters, their second inputs to the output of the pulse driver, the input of which is connected to the output of the peak detector and their outputs to the inputs of the first and second peak voltmeters, respectively, the outputs of which are connected to the inputs of the first and second multipliers, the outputs of which are connected to the inputs of the second adder, the output of which is connected via a phase meter to the input of the second recorder, the first output of the reference sine-cosine oscillator is connected to the second input of the second multiplier, and its second output to the second input of the phase multiplier.

Claims (4)

The device for monitoring the maximum deviation of the rotor from the axis of the turbomachine allows you to extend the functionality by determining the value of the static phase of the deviation of the rotor. Signals of contactless transducers 1 and 2, corresponding to the deviation of the rotor 3 than ~ Θ-Η — ΐ ”—θ * -] π NN »Η3 0 2 quad cutors 4 and 5, the adder 6 and the root extraction block 7 are fed to the input of the peak detector 8, which identifies the maximum deviation of the rotor 3, the signal from which is recorded by the recorder 9, and through the threshold unit 10 with the normalizing block 11 turns on the alarm 12, Pulses. Analog switches 13 and 14 are opened from the peak detector 8 through the pulse former 15, the signals of which through peak voltmeters 16 and 17 and multiplied 18 and 19 'arrive at the adder 2, and from its output through the phase meter to the recorder 23, on which the static Phase position of the rotor 3, At the second inputs of the impostor 18 and 19 and the meter 22 of the phase, the signals from the outputs are radiated to the oscillator 20, Such an embodiment of the device allows you to determine the value of the static and dynamic deviation of the rotor. 1 silt οι μ OE 3 1573216 four