SU1420418A1 - Measuring device for balancing machine - Google Patents

Abstract

This invention relates to a balancing tehnike. The purpose of the invention is to increase productivity by optimizing the choice of correction axes, which leads to an increase in the number of suitable rotors for correction. An imbalance value recorder 28, connected to the output of the filtering circuit 1, evaluates the need for correction. Registrars 32 and 33 of the unbalance components determine the mass values determined by the correction axes. The control of finding the correction axes opposite the correction position is determined by phase recorders 26 and 27. 5 il.

Description

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The invention relates to a balancing technique and can be used in balancing machines, automatic machines and automatic lines when balancing rotors with symmetrically spaced relative to the center of the vras, in places permitted for correction.

The purpose of the invention is to increase the productivity due to the optimal choice of correction axes, which leads to an increase in the number of rotors suitable for correction.

: FIG. 1 shows a block diagram of a measuring device to a balancing machine; in fig. 2, 3 - vector diagrams; where Omax is the maximum value of the disbalance component; D is the initial imbalance vector; DA and bn are components of the imbalance; XA and XB are the axes of the measuring oblique coordinate system; 1 --- 18 - numbers of axes of correction; a is the central angle between the axis Xd and Xv of the measuring oblique coordinate system; p is the central angle between the nearest correction axes; in fig. 4 — timing diagrams, numbers at the beginning of each of the Y-Axes, indicate the number of the block diagram element in FIG. 1, the axis vector diagram of FIG. 3 correspond to the positive impulses in the time diagrams of FIG. 4 (when the plane is rotated in which the century-turn diagram is located counterclockwise with a circular frequency w).

The measuring device to the balancing machine contains a filtering circuit 1, connected respectively to its first and second inputs of the vibration sensor 2 and a 3 phase sensor, a carrier frequency generator 4, the first output of which is connected to the first input of the 3 phase sensor and the third input of the I Phy; the second one - with the second input of the phase sensor 3 and the fourth input of the filtering circuit 1, the anchor circuit 5, the correction axis signal generator 6, the first and second inputs of which are connected respectively to the first and third outputs of the carrier frequency generator 4, the first and Eggory elements 7 and 8 of the synchronous delay, the first inputs of which are connected to the output of the imaging unit 6 of the correction axis signal and the first input of the coupling circuit 5, the output of which is connected to the second input of the synchronous delay element 7, and the unbalance measurement circuit 9, the first , the second, third, fourth, and fifth inputs of which are connected respectively with the output of the unbalance filtering circuit I and the second input. 5 bindings, 1 output of the sensor 3 phase, the third output of the carrier frequency generator 4 and the outputs of the first and second elements 7 and 8, respectively, of the synchronous

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holder, and the output with the second input of the second element 8 of the synchronous delay. The shaper 6 of the correction axis signal is made in the form of a programmer 10 connected in series by a single vibrator 11, the input of which represents the first input of the shaper of the correction axis signal 6, the shortening string 12 and the R counter input 13, the Sn input of which is connected to The programmer 10, and the C input and output are respectively the second input and output of the imaging unit 6 of the correction axis signal.

The tethering circuit 5 is in the form of a driver 14 and a D-BXO house 15 connected to it, the input of the driver 14, the C input and output of the trigger 15 represent the second and first inputs and output of the anchor circuit 5, respectively.

The unbalance parameter measurement circuit 9 is made in the form of the first and second counters 16 and 17 of the first and second Johnson counters 18 and 19, the C-inputs of which are connected respectively to the outputs of the first and second counters 16 and 17 connected in series to the shortening chain 20 and logic element 21, 2I, the output of which is connected to the R inputs of counters 16 and 17 and Johnson counters 18 and 19, connected in series to the first logic element 22 2I-IE, the first input of which is connected to the first output of Johnson’s first counter 18, a synchronous one the vibrator 23 and the second logic element 24 2I-NOT, the second input of which is connected to the output of the first logic element 22 2I-NOT, and the output to the CE input of the second counter 17, control unit 25 connected to the second input of the logic element 21 2I and ST - an input of a synchronous one-shot 23, two phase recorders 26 and 27 connected by first inputs to the first outputs of the corresponding Johnson counters 18 and 19, a recorder 28 unbalance values, an attenuator 29, two phase detectors 30 and 31, the first inputs of which are connected to the output of the attenuator 29, but the second inputs, respectively, with the second outputs of the second and first counters 18 and 19 of Johnson and connected to the outputs of phase detectors 30 and 31 of two recorders 32 and 33 unbalance components, interconnected inputs of recorder 28 unbalance values and attenuator 29 are the first input of the circuit 9 unbalance measurement parameters, interconnected second inputs of phase recorders 26 and 27 - second input, interconnected C-meters inputs of counters 16 and 17 - third input, shortening chain 20 input - fourth input, second input d of the first NAND gate 22-2I NOT - a fifth input, a first output of the first counter 18 Johnson -

Anchoring scheme 5 is designed to determine the closest, next in time to the unbalance vector D axis allowed for correction (see axis 5 in Fig. 3) and form positive output signal differences corresponding to this axis (see time diagram 5 in Fig. 5 ).

To do this, the C-input of the trigger 15 receives impulses corresponding to the correction axes, and the D-input contains impulses whose positive drops correspond to the unbalance vector D. These impulses are produced by the driver 14, which is part of circuit 5.

Element 7 synchronous delay should provide a shift of the output signal of the circuit

an attachment at an angle - chr, where N -. In this case, the measurements of the unbalance parameters of the axis XD, XB of the measuring coordinate system formed in scheme 9 will be located symmetrically with respect to the sector formed by the axes closest to the unbalance vector D axes allowed for correction. For the specified shift to the clock input of the synchronous delay element 7, pulses are produced corresponding to the correction axis, the angle between which is equal to p.

The positive drops in the output pulses of the synchronous delay element 7 are converted by the shortening chain 20 into short pulses, which provide synchronization along the R-inputs of counters 16 and 17 and counters 18 and 19 Johnson. The resulting recalculation module of the counter 16 (17) and the counter 18 (19) Johnson is chosen equal to the ratio of the frequencies of the clock pulses to the C input of the counter 16 (17) and the carrier clock at the R inputs. Therefore, on each of. The four outputs of counter 18 (19) Johnson are allocated to meander pulses of the square wave type with a mutual phase shift of 90 °.

Thus, before the command is received from the control unit 25, pulses are formed at the first output of Johnson's counter 18, the positive drops of which correspond to the Chl axis. This signal is fed to the second inputs of the element 8 of the synchronous delay and logic element 22 2I-NOT. Element 8 synchronous delay provides a delay signal XA at an angle a Np. To do this, the output impulses of the 6 6 correction axes with an interval between them, corresponding to the angle) are received at its clock input, and the delay is chosen equal to N cycles. In this case, the output of the following: K) element of the 2 2I-NOT element is the frequency pulses s, the duration of the bullet level of which corresponds to the angle a-. p (see the timing diagram 9 pa fpg. 5).

After switching the unbalance signal filtering circuit 1 into storage mode - (over a circuit not indicated in pa of Fig. 1), control unit 25 generates, in the form of an "O command, which is fed to the second input of the logic element 21 2I and the ST input of the synchronous one-shot 23. At This logical element 21 2I blocks the passage of synchronization pulses to the R-inputs of counters 16, 17 and Johnson counters 18 and 19, which puts them in the dynamic phase storage mode. Simultaneously, the synchronous one-shot 23 generates a single pulse, the duration of which is determined by the repetition period of negative signal drops, arriving at its C-BCOD and to the second input of the logic element 24 2I-NOT, i.e. carrier frequency period. At the same time, a single zero-level pulse is released at the output of the logic element 24 2I-NOT, blocking the CE-input (counting resolution input) counter 17 for a time interval that corresponds to the angle 2L-apt. As a result, the phase of the pulse at the primary output of Johnson's counter 19 is shifted with respect to the signal X.- by an angle 2L-a and corresponds to the axis XB.

In this way, after the command is issued by the control unit 25 of the period of the carrier frequency, the outputs of the Johnson counters 18 and 19 are set to receive signals corresponding to the H.- and Xi axes. The Chl and. Xy signals are used to find the components DA and DB on the rotor using phase recorders 26 and 27. The signals Chl (270 °) and Xs (90 °) are used as reference for measuring the value of the components O.L and DB.

The rotors are balanced using the device in the following sequence.

The rotation is switched on at a time interval sufficient for setting transients in the unbalance signal filtering circuit 1, the device switches to the information storage mode and the rotation of the balanced rotor is turned off. Thereafter, the unbalance value recorder 28 is used to assess the need for correcting the unbalance (by comparing the unbalance value with a value acceptable for a given rotor), and the recorders 32 and 33 unbalance components - to determine the amount of the corrective mass that needs to be eliminated or added (depending on selected correction method) for each of the two axes XA and XV. Rotating the rotor (manually or automatically), control the time of finding the axes of the Chl or Hv axes opposite the correction position or pointer using phase recorders 26 and 27.

Measuring device to balancing machine provides measurement of soy

the output of circuit 9 for measuring the parameters of unbalanced signal.

The first and second elements 7 and 8 of the synchronous delay can be executed, for example, in the form of shift registers.

The device works as follows.

Measurement of the components of the imbalance in an oblique coordinate system is based on phase detection of the unbalanced signal unbalancedly and not transferred to the carrier frequency OJ of the imbalance.

The filtering of the imbalance signal released at the output of the vibration sensor 2 during the rotation of the balancing rotor (not shown in Fig. 1) with the frequency Q, axle |, is indicated by the filtering circuit I. The reference signal arrives at the second input of the filtering circuit 1 from the phase sensor 3, the rotor of which is kinematically connected with the balanced rotor. A rotating transformer or a selsyn used as a 3 phase sensor works in a phase shifter mode, for which multiphase (two phase — if using a rotary transformer and three phase — if selsyn) signals supplied by the 4th carrier frequency generator are fed to its inputs, the latter also feeds orthogonal carrier signals frequencies of the filtering circuit 1, the output of which produces a harmonic signal of the frequency co, amp; rtud: and the phase of which carry information about the frequency,; and the imbalance vector. The unbalance value recorder 28 provides an indication of the unbalance value or (i) conversion of the unbalance value to a discrete form when automating the balancing process.

To measure the components Od and DB (located on the axes of Chl and Xi), the imbalance signal transformed to the carrier frequency w through the attenuator 29, taking into account the factor ji, is sent to the information inputs of the phase detectors 30 and 31. At the second inputs of the phase detectors 30 and 31 adjustments are reference signals corresponding to the OS X. (270 °) and HV (90 °). These signals are generated by Johnson counters 18 and 19.

Constant voltages, proportional to the component values of the unbalance DA and DH, from the outputs of phase detectors 30 and 31 butt to the recorders 32 and 33 components unbalance to indicate or to convert to discrete form when automating the balancing process.

The DA and DB components on the balanced rotor are found by comparing the phases of the signal of the global position of the rotor, formed by a 3-phase sensor and signals corresponding to the X and Xn axes of the measuring cross-sectional coordinate system, on which

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imbalances b. n he For this signal angular position of the tap, which is a sinusoidal frequency N1, comes from the 3 phase sensor on the pa (second) inputs of the phase recorders 26 and 27. Rectangular carrier frequency pulses пр are fed to their first inputs, i.e., the phase of the positive differences corresponding to the chi axis. As a result, the j-junction of components 1) l and Dii by | if) TO |) e of the robots by rotating the balancing rotor (rigidly connected with the sensor rotor 3 stages) until the phases of the signals at the recorder inputs 26 and 27 coincide (alternately) .

With this, the requisite constituting (1) l or Di Di -) Blvd. t naholichch with unipOTnB fixed pep. Move (on pointer pointer or drill.: 1 NOy head.

The ability to set the pointer or drill head in an arbitrary place can be provided by m1a, for example, turn on, by sticking at the output of the circuit 1 phi.1 h of the imbalance signal, which regulates the phase shifter.

Consider the process of forming signals, corresponding to the axes on the 6a; iaiicnpye rotor, the necessity of measuring the values of the components DA and DB and finding them on the rotor.

The correction signal generator 6 generates a signal that is an electrical analog of the rotor correction axis. This system represents the direct impulses of the impulse of the meander, the number of which in the period of the carrier frequency is equal to the number of correction axes, and the phase of their positive differences relate: 1b signal, feeding the first input of the sensor 3 phases, corresponds to the angular position of the axis system K on balanced rotor Signal conditioning

with frequency Kc / (where K is the number of rotor correction axes) is carried out, for example, by counter 13, the counting module n of which is set by 5 "input (input of the counter preset to the state corresponding to the number n) by the programmer 10. When the ratio Frequencies on the second and third outputs of the generator 3 are non-suphey frequencies, for example, 360 °, the number is equal to the angle pi expressed in degrees.

FIG. 2 and 3 show an example for an angle of P 20 °.

The phase of the output pulses of the counter 13 is determined by the phase of the pulses on its R-BXO, which are formed by / K (I shake, 1 chain 12 on the decay and, 1p1, 1s, produced by the one-vibrator 1. The change in the pulse duration u.THoriiiopaTona 1 1 - the image of G1OZVOLYAS1- h-ganon1: phase of the signal of the frequency KcOj cool: -: etch1 of the corner of the young to the young / kenya oceii. p;, (place; 1П1. |. number K (jppeKiuin on the ba. lansnschchum,.

pressing imbalances in an oblique coordinate system with a central angle between its axes, a multiple of the central angle between the axes of the correction. In this case, the orientation of the measuring coordinate system is always carried out in such a way that its axes are located symmetrically with respect to the sector formed by the correction axes closest to the unbalance vector. This property of the device allows to increase the value of the maximum initial imbalance of the rotor, which can be adjusted and, accordingly, increase the yield of suitable parts.

Claims (1)

Invention Formula Measuring device to the balancing machine, containing a filtering circuit connected respectively to its first and second inputs of a vibration sensor and a phase sensor, a carrier frequency generator, the first input of which is connected to the first input  AT / 7 sixteen 2 0 0 the phase sensor and the third input of the filtering circuit, and the second with the second input of the phase sensor and the fourth input of the filtering circuit, the coupling circuit, the correction axis generator, the first and second inputs of which are connected respectively to the first and third outputs of the carrier frequency generator, and the output is with the first input of the coupling circuit, and the unbalance measurement circuit, the first output of which is connected to the output of the filtering circuit and the second input of the coupling circuit, the second to the output of the phase sensor, and the third to the third output of the carrier generator In order to improve performance, it is equipped with the first and second synchronous delay elements, the first inputs of which are cc) Span 1 with the output of the correction axes signal generator, the second - respectively of the outputs of the linking circuit and the parameter measuring circuit. imbalance and outputs respectively with the fourth and fifth inputs of the unbalance measurement circuit. and 6 and / and 5 and 7 and 20 and 18 (0 and eight and 9 and J3 (0) -t 1ppppppshshllppt1lplpppplppppppgshppppapsh1G1P gshsh1G. FIG. five eleven 12 cot Wt (j) t oot