SU321693A1 - DEVICE FOR MEASURING THE VIBRATION OF ROTATING OBJECTS - Google Patents

Description

The present invention relates to the field of measurement technology.

Devices for measuring vibration of rotating objects, such as turbine blades, are known, which include pulse measurement sensors mounted on the stator part against areas of the test objects, connected via a switch to the information processing unit, and pulse command sensors with a switch mounted against the rotor marks.

The proposed device allows to improve the measurement accuracy due to the fact that it is equipped with a control pulse sensor connected to the control input of the switch of pulse command sensors and a calibration sensor connected between the information processing unit and the output of the switch of pulse command sensors, the other output of which is connected to the control the input of the pulse sensor switch.

The drawing shows a schematic diagram of the proposed device, which shows the location of the pulse sensors in various cross sections of the machine and the electrical connection of these sensors with electronic components.

4, which, for example, serve as a pin pressed into the rotor.

Sensor 1 is electrically connected to the control input of an annular switch 5, which molkhet serves as a nanrnmer, an electronic switch assembled according to the usual annular recalculation circuit, switching swap links in series along the ring when it is fed to its control input of control pulses. The number of switchable links of the ring switch is 5 pa units per unit more than the number of controlled blades 6. On the circumference of the rotor 3 there is a series

command marks 7, which constructively serve, for example, 3 pieces pressed into the rotor; 1 pieces, or a wheel with toothed sectors rigidly connected with the rotor 3. The angular distance between adjacent marks 7 of the meter. Against the marks on the stator 2 ras1; there are positive implanted command sensors 8. All kolishdpy sensors are 8 ppeptic and located along a circle with angles of space pp equal to iyy iy distance between

each with a blade 6. Each command sensor: 1K L is connected to the corresponding switching element of the ring switch 5. The switching output of the ring front is the same as the measuring ring of the switch 9.

Kolichst1; o:; at all psms1} ggsl: th iie.jc switch 9 equals the number of marks 7. The circumference of the etator 2 is opposite: e |} ;, fer; l 1plch blades 6 installed clues. . jijbix da1chnkos 10. Weight lu; merry Danish; identical to n) is a part of the circumference aslola1ayuts etatora 2 angularly raeeto nnem equal angular raeeto apy between komaidpymn metkamn 7. 1 (s olicheetvo measuring datch1n JO on ednnntsu less kolncheetva command glegok 7. Measuring sensor vynolneny movable along the radial direction. Each measuring sensor is connected It has an elliptical switch PZ, a sender} of the switch 9. The switching output of the measuring switch 9 is connected by the input of an electronic converter 11, which, in turn, is connected to a calibration sensor 12 associated with one of the links of the ring switch 5. The calibration sensor 12 is located on the stator e 2 against the calibration marks 13, which are variable by variable p; i ;; i the rotor circumference 5.

Tariff marks 13 m01Lt c.iyjKirrb, for example, 3 pins zaireyovanovye in the rotor, or a gear wheel,. Rigidly with the rotor.

The output terminals 14 of the electronic inverter 11 are used for iodine isolation of electrical registrar or electrical equipment.

Donust 1N, that the rotor 3 is large ;; ve}) 1that the rotational rotation in the direction indicated on the drawing by the arc eagle. The switch 5 and 5 circuits are so designed that when the n-sh source is switched on, the diagrams gn (not shown) are connected to the whole circuit with a pair of sensor sensors 12 in the switch 5 and a free link (in the drawing) in the switch 9. When control tag 4 passes against the sensor / the latter generates a control pulse, which switches the control input of the standard 9 from the calibration link of switch 5 to the link through the ring (the bottom one) to which the command link is connected Point 8. The angular location of the control mark 4 and the command marks 7 is chosen so that the impulse of the control sensor / is up to several seconds after the moment when the command sensor 7 passes by the command sensor o. Marks 7, turning with the rotor 3,; go to the comaid sensor 8, KCTG gee {ii the time of all this turnover of the electrodes is connected through H1 more than 3 ie; io is not a switch; the body 5 with the control input pers -; lu1a: sl 9 , because the control sensor / produces one impulse in one 10 rotor speed of the rotor 5. Bintz | 0c arrangement 1 ohm; 1; bottom marks 7 and lonatok 6 is calculated by the way that the first ;; MO, D1; o; 0 sensors o several}) is longer than the blade 6 m. My 5 iz; ep G1ely10. Imnul s, vy; bot: il; Yom oma; d1; th dpchkom 8 when passing past him the mark of 7, pr01; dst through j ;; in more detail, Cg5C1; O ;; C,) Ck, Lt; -, 1 5, on the control inputs 1; 1 switch 9 liters KJjK) i: iT input elec1: n) 1st :: Jl converter from the free zone to which it sy.t keys from the moment of iodation to the circuit, iia is the next link to which the sensor 10 is connected.

5 Thus, the measuring sensor 10 will be connected to the input of the electronic converter 11. At the moment when the blade 6 passes by the measuring sensor 1G, the latter produces the first measuring pulse, which is perceived by the converter 11. Due to the equality of the angular distance between adjacent command, 1 angles 7, the angle between adjacent sensors measuring 10, but the legacy will be connected to the input of the electrolyte: formative // several paiHHJie, than the pilot 6 will pass by this sensor :; 1G. Thus, it is achieved gated this loiatki 6. Emiulea,

0, alternately measuring by gauges 10, due to the passage of the same ram 6, but the nets of an elec- tronic inverter 11, are converted into an electric signal, which is normal to the HH phase. Since the angular distances between adjacent measuring sensors 10 are strictly interconnected, the phase of pmiuls produced by measuring sensors 10 alternately when passing by the same loiatki 6, iroportsiopalpa proportional in time to the vibration of this loyat 6, since so much command signals 7 more than the measuring sensors 10, then after the passage of the blade 6 of the last sensor 10, the switch 9, including its free link, comes to its position.

0 Upon completion of the rotor 3 full turns, the mark 4 will again pass by the control sensor ./. By operating this control sensor 1, the switching pulse will switch by means of switch 5

5 control input, switch 9 input from the first control sensor 8 pa next to the pyrazleipn, protrude BpanieHini direction rotor 5, the gauge of this weight. Due to the fact that the angular distribution is ju

0 between neighbors; mn at 1ravl: yu; 11mp sensors 8 equal to the angular distance; :: 1new between neighborsivUi loiatkamn b, imeni ;; ss produced by the following;: m; k; dkl10; en1nly sensor 8 and passing; ;;.; mnmo iiero; 1note 7, will be yuki, adjacent in the direction of rotation of the rotor 3.

Subject invention

A device for measuring vibrations of rotating objects, for example turbine blades, containing pulse measurements of "1 sensors installed on the stator part against areas of test objects connected via a switch to the information processing unit, and pulse comaid sensors with a switch installed by rotor marks, distinguished by that, in order to increase accuracy, it is equipped with a control pulse sensor connected to the control input of the switch of the pulse command sensors, th datchnkom connected between an information processing unit and the output switch command pulse sensor, the other output is connected to input switch unravl yuschim pulse encoders.

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