SU1310653A1 - Machine for balancing rotors by centring - Google Patents

Abstract

This invention relates to a balancing technique. The purpose of the invention is to simplify by replacing digital technology with analog. The control unit 8 memorizes in the memory circuits 24-27 the orthogonal projections of the unbalance vector in the Measurement mode, compares them with the current values in the Correction mode and modulates the orthogonal signals, which are summed for each correction plane in the adders 28 and 29, by amplification signals amplifiers 30 and 31 and are fed to the inputs of devices 32 and 33 of the displacement of the rotor axis 2. 1 sludge. (L 00 05 el 00

Description

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This invention relates to a balancing technique and can be used to balance rotors by centering.

The aim of the invention is to simplify the machine by replacing digital technology with analog devices.

The drawing shows a block diagram of the machine.

The machine contains an oscillating these-fO during which the scheme 24 - 27 pa

Subject 1, on which a balanced rotor 2 with a drive is mounted, mounted on an oscillatory system 1, vibration sensors 3 and 4, a successively connected sensor 5 of the reference signal and a generator 6 of the reference signal, a measuring device 7, whose inputs are connected to the outputs of the vibration sensors, and the reference inputs from the outputs of the reference signal generator 6, the control block 8, made in the form of a loop control scheme -9 and two identical channels 10 and 11, each of which includes two chains formed by successively connected sum pitch 12 (13 and 14, 15) and modulator 16 (17 and 18, 19), the second input of which is connected to the corresponding output of the reference signal generator 6, and connected to the inputs of the adder 12 (13 and 14.15) by an inverter 20 (21 and 22, 23) and the circuit 24 (25 and 26, 27) of the memory, the inputs of which are interconnected and with the corresponding output of the measuring device 7, and the third (sixth) adder 28 (29) connected in series, the inputs of which are connected to the outputs of the modulators 16 and 17 (18 and 19), and the power amplifier 30 (31), the second input of which is connected to the first output of the loop control circuit 9, second the output of which is coupled to second inputs of the circuits 24 - 27 s ti n rigidly associated with the vibrational system of devices 32 and 33 bias the rotor shaft 2, whose inputs are connected respectively to the outputs of amplifiers 30 and 31, power and tool heads 34 and 35.

As a measuring device 7, you can use any device whose output signals represent orthogonal projections of unbalance vectors in the coordinate system associated with the reference signal, for example, series-connected multiplier and filter.

As the rotor axis displacement device 32 (33), for example, an electrodynamic vibrator can be used.

The machine works as follows.

When the start button (not shown) is pressed, the rotor 2 is rotated and the cycle control circuit 9 sets a specific time for measurement.

five

5 0 0 5 0

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The mti are connected to the outputs of the measuring device 7, and the amplifiers 31 and

32 power off. The measuring device 7 determines the orthogonal projections of oscillations of the supports of the rotor 2 in the coordinate system associated with the signal of the generator 6 of the reference signal.

After the measurement time expires, the cycle control circuit 9 enters the Correction mode and, affecting the second inputs of the memory circuits 24–27, puts them into the memory mode, and also affects the second inputs of the power amplifiers 30 and 3, allows sinusoidal voltages to be applied to device inputs 32 and

33 displacements of the rotor axis 2. At the same time, the tool heads 34 and 35 are turned on and the centering holes are machined. In this case, each power amplifier 30 and 31 is given a signal equal to the difference stored in the Measurement mode and the current signals of the support oscillations; Next, during the centering process, the position of the main central axis of inertia of the rotor 2 is monitored.

Thus, the use of the described control unit allows to simplify the machine design by excluding the mini-computer from its composition and replacing it with a simpler measuring device. In addition, the proposed control unit is simpler than the prototype.

Claims (1)

Invention Formula 5 20 -30 35 40 A machine for balancing rotors by centering, containing an oscillatory system with a rotor drive, vibration sensors attached to it, an associated measuring device, a reference signal sensor and a generator connected in series 55 of the reference signal, the control unit, connected to its outputs, two devices for displacing the rotor axis, rigidly connected with the oscillatory system, and tool heads, about 313106534 due to the fact that, with the purpose of the inverter with the inputs of the adder simplification by replacing the digital and memory circuits, the inputs of which are analog devices with devices, from between the connection and the corresponding The measuring device is filled with the ana output of the measuring device, and den, and the control unit is connected in series the third in the form of a cycle control circuit and a two-adder, whose inputs are connected to identical channels, each with modulator outputs, and amplifier includes two chains, a power pattern, the output of which is Bathrooms connected in series by the corresponding block output the adder and the modulator, the second input of the control, and the second input of the amplifier which is connected to the appropriate power is connected to the first vyad generator output reference signal circuit control loop, the second output and the corresponding reference input from which is connected to the second inputs measuring device and all memory circuits connected.