SU1458740A1 - Apparatus for balancing rotors - Google Patents

Description

The invention relates to balancing equipment and can be used in various fields of mechanical engineering for balancing rotors in proper bearings according to the test load method.

The purpose of the invention is to increase the accuracy and productivity of the device due to the automation of measurements during balancing according to the test cargo method.

Figure 1 shows the structural diagram of the proposed device; figure 2 is a vector triangle of the relative amplitudes of the vibrations, and the forces causing them.

The device comprises an imbalance meter 1, a clock generator 2 connected in series, a digital 20 phase meter 3 and an indication unit 4, a processing unit 5 made in the form of four memory cells 6-9, the inputs of the first 6 and second 7 memory cells are connected to the output of the digital phase meter . 25 3, analog-to-digital Converter 10 (ADC), the input of which is connected to the output of the unbalance meter 1, the second input of the digital phase meter 3 and the fourth input. Indication unit 4, 30 and the output s. the inputs of the third 8 and fourth 9 memory cells connected to the outputs of the divider 11, and series-connected calculator 12, the inputs of which are connected to the outputs 35 of the first 6 and second 7 memory cells, phase shifter 13 and digital-to-analog converter 14 (DAC), a pulse generator 15 and a block 16 comparison, made in the form of sequentially connected the first shaper 17, the input of which is connected to the output of the DAC 14, and the adder 18, the second shaper 19, the input of which is connected to the output of the pulse generator 15 and the second input of the phase shifter 13, and zometra 20, a first input coupled to an output of the second driver 19 and the second input of the adder 18, the second input - to the output of the latter and a second input indicating .bloka 4, and the output - to the third input of the latter.

Processing unit 5 with a digital phase meter 3 can be performed, for example, based on the microprocessor kit K580. The pulse generator 15 is a meander generator.

The device operates as follows.

In the meter of imbalance 1, the mechanical vibrations caused by the rotation of the rotor are converted into a signal containing information about the amplitude and phase of the vibrations, which is fed to the second input of the digital phase meter 3 and to the indication unit 4. The clock generator 2 generates a pulse signal when interacting with the mark applied to the balancing rotor, which is fed to the first input of the digital phase meter 3. From the output of the digital phase meter 3, the information on the phase of the oscillations is relative to the clock pulse. At the moment when the signal of the unbalance meter 1 reaches its maximum value, using ADC 10, it is converted to a digital code, which is stored in memory cells 8 or 9.

At start-up with initial imbalance, information about the amplitude A _of oscillations is entered into memory cell 8, and information about the phase Ψ _{ο of} oscillations is entered into memory cell 6. In subsequent launches with test weights, information about the amplitude A and 'phase Y of the oscillations is recorded in memory cells 9 and 7, respectively. In the divider g, the ratio m-content A <?

many cells of .9 and 8 memory; which after conversion to the DAC 14 enters the block 16 comparison. In the calculator 12, the difference 4 ′ 7 = of the contents of the memory cells 7 and 6 is determined, which is supplied to the first input of the phase shifter 13. The phase shifter 13 shifts the phase of the signal (meander) coming from the second input from the pulse generator 15 by 4 Ψ. The output signal of the phase shifter 13 serves as a reference signal for the DAC 14. At the second shaper 19 of the comparison unit 16, from the output of the pulse generator 15 of the processing unit 5, a meander of constant amplitude, taken as food, is received.

- A „'is null (1 = t-). At first formirova1 A comparison _of block 16 with Tel 17 vyoda

The DAC 14 of the processing unit 5 receives a meander with an amplitude corresponding to the ratio and phase shifted by Δ Ψ. Both square wave ³ 1458740 shapers 17 and 19 are converted into harmonic signals, which are algebraically summed in the adder 18. At the output of the adder 18, the floor is _about A ζ.

a signal is generated with an amplitude - (And A $ g the amplitude of the vibration caused by the test load) and phase Ψ relative to the unit vector G (Fig. 4.2). '

Oh _oh

So. as a vector triangle of relative vibration amplitudes is similar to a vector triangle of siphoning these causing vibrations, then the ratio is the weight of the test load;

weight of the balancing load; shows how many times you need to change the weight P of the test load.

The Ψ value measured in the phase meter 20 characterizes the angle of installation of the balancing load 0 relative to the place where the trial load P. was located. Information characterizing both Ψ is supplied to the second and third inputs of the display unit 4.

A non-contact photoelectric converter is used as a sensor in the generator. 2 of the sync pulse, which generates a sync pulse when the mark applied to the rotor passes through the working area of the sensor.

where P O Unbalance meter 1 provides the measurement of oscillations (vibrations) of the rotor, amplification of the vibration signal and filtering in order to isolate the component corresponding to the rotor speed. The primary sensor of the imbalance meter 1 is a piezoelectric transducer.

The implementation of the digital phase meter 3 with the processing unit 5 in the form of a microprocessor unit is the most appropriate, as this increases the accuracy and reliability of the device.

Using the proposed device improves labor productivity (2-2.5 times) and the accuracy of balancing the rotors in their own bearings according to the test load method by eliminating graph-analytical analysis with it also qua. subjective errors allows the calculation and related classification, and reduce the requirements of the operator.

Claims (1)

A ditch balancing device comprising an unbalance meter, a clock generator, a pulse generator, a processing unit and an indication unit, characterized in that, in order to improve accuracy and performance, it is equipped with a digital phase meter whose inputs are connected to the outputs of the unbalance meter and a clock generator, and the output - with the first input of the display unit, and the comparison unit, made in the form of two shapers connected to their outputs of the adder and phase meter, the first input of which is connected to. the output of the adder and the second input of the display unit, the second input is the output of the second driver, and the output is with the third input of the display unit, and the processing unit is made in the form of four memory cells, the inputs of the first and second of them are connected to the output of the digital phase meter, analog-to-digital converter , rotokotorogo input connected to the output unbalance measuring instrument and to a fourth input of the indication unit, and an output - to the inputs ⁴⁰ of the third and fourth memory cells connected to the outputs of the last divider and the series-connected calculator input where cos _(dineny to the outputs of the first and second 1yacheek memory 45, a phase shifter, a second input coupled to an output of the pulse generator n input of the second generator and the digital to analog converter, the second input of which is coupled to an output of .50 divider and vyhods input of the first driver.