SU104819A1 - Acoustic method for detecting cavitation in hydraulic machines and other similar devices - Google Patents
Acoustic method for detecting cavitation in hydraulic machines and other similar devicesInfo
- Publication number
- SU104819A1 SU104819A1 SU453782A SU453782A SU104819A1 SU 104819 A1 SU104819 A1 SU 104819A1 SU 453782 A SU453782 A SU 453782A SU 453782 A SU453782 A SU 453782A SU 104819 A1 SU104819 A1 SU 104819A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- cavitation
- similar devices
- hydraulic machines
- acoustic method
- detecting cavitation
- Prior art date
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
Уже известны акустпчссюге способы обнаружени влений кавитации, когда о возникновении н кавнтацни суд т по количесгву энергии , noTepJiHHoij ультразвуком, пос .ланным через зону кавитации на нсс.гедуе.мую деталь машины с применением ири этом лампового уси.чител .Acoustical methods of detecting cavitation are already known, when the occurrence of cavitation is judged by the amount of energy, noTepJiHHoij, by ultrasound, sent through a cavitation zone on an nss.guedu.my machine part using this lamp.
В описываемом ниже способе дл обнаружени кавитации используетс ко.чебаиие среды, в KOTopofi она возиикает. Эти колебани воспринимаютс пьезометрическим ириелМником с преобразованием их в равный ио частоте электрический ток, по величине амплитуды которого суд т о состо и и и кавита ци н.In the method described below, a cosmic environment is used to detect cavitation, which occurs in KOTopofi. These vibrations are perceived by a piezometric Michelin with their conversion into an electric current equal to the frequency, according to the magnitude of which the amplitude is judged on the state and cavitation of cavitations.
Как известно, вл ние кавитации сопровождаетс звуковыми колебани ми . Эти колебани содержат широкий спектр частот и физически св заны с процессом кавитации.As is known, cavitation is accompanied by sound vibrations. These vibrations contain a wide range of frequencies and are physically associated with the cavitation process.
Но так как на колебани , сопровождаюш ,ие кавитацию, накладываютс колебани , вызваннь е другими причинами, то по общему шуму (колебани м ) трудно определить характер развити кавитации, а кавитационный коэффициент в этом случае вл етс показателем начала срываBut since oscillations, concomitant and non-cavitation, are superimposed by oscillations caused by other reasons, it is difficult to determine the nature of the development of cavitation from the total noise (oscillations), and the cavitation coefficient in this case is an indicator of the onset of failure
энергетических иара.метров гидромашины , иапример, турбины.energy meters of hydro machine, and, for example, turbines.
Таким образом, задача сводитс к оиреде.иению кавнтационного коэффициента и наблюден1по за развитием кавитации. Дл этой цели на статор манп|ны устанавливаетс пьезометрический приемник, который, восиринима звуковые колебани , воз1нН; аюи-1 ,ие при кавитации, преобразует их в равный но частоте колебаiinji электрический ток. Этот ток лсиливаетс усилителем, пропускаюицгм хзкую полосу частот шума. По амп.читуде ко.:1ебаннй тока с}д т о состо нии и развитии кавитации.Thus, the task is to determine the coefficient of measurement and observe the development of cavitation. For this purpose, a piezometric receiver is installed on the manpent stator, which, as sound waves, is generated; Ayuy-1, when cavitation, converts them to an equal but oscillating frequency electric current. This current is amplified by the amplifier, passing through a band of noise frequencies. According to the amplitude of the ch. Co.: 1 banny current c} d t about the state and development of cavitation.
На чертеже изображена крива зависимости амплитуды и-ультразвуковых колебании от коэффициента кавитации -. т. е. от режима работы гидромашины.The drawing shows the curve of the dependence of the amplitude and ultrasonic vibrations from the coefficient of cavitation -. i.e. on the operating mode of the hydraulic machine.
Рост интенсивности ультразвуковых колебаний, характеризующийс кривой а соответствует росту интенсивности кавитации. Порог, с которого рост интенсивности колебаний прекращаетс или происходит падение колебаний, соответствует режиМ} гидромашины, при которой начн нают падать энергетические показатели .The increase in the intensity of ultrasonic vibrations, characterized by the curve a, corresponds to an increase in the intensity of cavitation. The threshold from which the increase in the oscillation intensity ceases or the oscillation decreases, corresponds to the mode} of the hydraulic machine, at which the energy indices begin to fall.
Такой способ позвол ет примен ть более простую аппарат ру п уменьшает врем , затраченное на обнаруженпе кавитации.Such a method allows the use of a simpler apparatus and reduces the time spent on cavitation detection.
Ире д м е т и з о б р е т е и н Ire dmete and z obrete n and
Акустический способ обнаружени кавитации в гилТ.ромашинах и других подобных устройствах с пспользованпем звуковых ко,теба1пп 1 среды, вAcoustic method of detecting cavitation in gilT. Machines and other similar devices with sound systems that are used in media, in
которой возникает кавитаци , отл и чающий с тем, что, с целью применени более цростои аппаратуры , эти колебани воспринимают пьезометрическнм приемником с преобразованием их в равный ио частоте электрический ток, по ве.чичине амплитуды которого после пропуска его через усилитель, пропускающий узкую полосу частот шума, суд т о состо нии и развитии кавитации .in which cavitation occurs, which, in order to use more hardware, these vibrations perceive the piezometric receiver with their conversion into an equal to the frequency electric current, according to the magnitude of which, after passing it through the amplifier, passing a narrow frequency band noise, judged on the condition and development of cavitation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU453782A SU104819A1 (en) | 1956-01-12 | 1956-01-12 | Acoustic method for detecting cavitation in hydraulic machines and other similar devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU453782A SU104819A1 (en) | 1956-01-12 | 1956-01-12 | Acoustic method for detecting cavitation in hydraulic machines and other similar devices |
Publications (1)
Publication Number | Publication Date |
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SU104819A1 true SU104819A1 (en) | 1956-11-30 |
Family
ID=48378292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU453782A SU104819A1 (en) | 1956-01-12 | 1956-01-12 | Acoustic method for detecting cavitation in hydraulic machines and other similar devices |
Country Status (1)
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SU (1) | SU104819A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2472038C2 (en) * | 2009-07-17 | 2013-01-10 | ЭйчЭмДи Сил/Лесс Пампс Лимитед | Pump actuated through magnetic coupling and equipped with non-contact vapour detector |
-
1956
- 1956-01-12 SU SU453782A patent/SU104819A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2472038C2 (en) * | 2009-07-17 | 2013-01-10 | ЭйчЭмДи Сил/Лесс Пампс Лимитед | Pump actuated through magnetic coupling and equipped with non-contact vapour detector |
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