SU826079A1 - Method of determining critical cavitation reserve of blade-type pump - Google Patents

Method of determining critical cavitation reserve of blade-type pump Download PDF

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Publication number
SU826079A1
SU826079A1 SU792811043A SU2811043A SU826079A1 SU 826079 A1 SU826079 A1 SU 826079A1 SU 792811043 A SU792811043 A SU 792811043A SU 2811043 A SU2811043 A SU 2811043A SU 826079 A1 SU826079 A1 SU 826079A1
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USSR - Soviet Union
Prior art keywords
blade
type pump
pump
determining critical
critical cavitation
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SU792811043A
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Russian (ru)
Inventor
Игорь Вадимович Щербатенко
Анатолий Семенович Шапиро
Любовь Петровна Сапрыкина
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Предприятие П/Я В-8534
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Priority to SU792811043A priority Critical patent/SU826079A1/en
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Publication of SU826079A1 publication Critical patent/SU826079A1/en

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Description

1one

Изобретение относитс  к гидромашиностроению , а именно к кавитационным испытани м лопастных насосов и может быть применено в насосостроении при экспериментальном определении критического (срывного ) кавитационного запаса шнекоцентробежных и шнековых (осевых) насосов, перекачивающих криогенные жидкости.The invention relates to hydraulic engineering, in particular to cavitation tests of vane pumps and can be applied in pump engineering in the experimental determination of the critical (stalling) cavitational stock of centrifugal and screw (axial) pumps pumping cryogenic liquids.

Известен способ определени  критического кавитационного запаса лопастного насоса , перекачивающего криогенную жидкость , путем его испытани  на этой жидкости при посто нных значени х производительности и угловой скорости вращени  рабочего колеса, и переменном давлении на входе в насос 1. По результатам этого испытани  строитс  частна  кавитационна  характеристика насоса и с ее помощью определ етс  критический (срывной) кавитационный запас насоса , соответствующий началу резкого падени  напора насоса.A known method for determining the critical cavitation stock of a vane pump pumping a cryogenic fluid by testing it on this fluid at constant values of the performance and angular velocity of rotation of the impeller and alternating pressure at the inlet of the pump 1. Based on the results of this test, the partial cavitation characteristic of the pump and with its help, the critical (breakdown) cavitational reserve of the pump, corresponding to the beginning of a sharp drop in the pump head, is determined.

Однако этот способ  вл етс  сложным, что обусловлено необходимостью проведени  испытани  насоса на криогенной (рабочей ) жидкости, и требует применени  дорогосто щего оборудовани .However, this method is complicated due to the need to test the pump on a cryogenic (working) fluid, and requires the use of expensive equipment.

Известен также способ определени  критического кавитационного запаса лопастного насоса, перекачивающего криогенную жидкость, путем его испытани  на холодной деаэрированной воде при посто нных значени х производительности и угловой скорости вращени  рабочего колеса, и переменном давлении на входе в насос, и на модельной жидкости при одинаковых значени х произведени  критериев, характеризующих услови  подоби  тепловых и гидродинамических процессов при кавитационном срыве работы насоса на криогенной и модельной жидкост х 2.There is also known a method for determining the critical cavitation reserve of a vane pump pumping a cryogenic liquid by testing it with cold deaerated water at constant values of performance and angular velocity of rotation of the impeller, and with variable pressure at the pump inlet, and with model liquid with the same values the production of criteria characterizing the conditions for the similarity of thermal and hydrodynamic processes in the case of cavitation breakdown of the operation of a pump on cryogenic and model fluids 2.

Однако известный способ  вл етс  сложным , так как в качестве модельной приходитс  использовать криогенную жидкость.However, the known method is complicated, since a cryogenic liquid must be used as a model.

Цель изобретени  - упрощение испытани .The purpose of the invention is to simplify the test.

Поставленна  цель достигаетс  тем, что в качестве модельной жидкости используют высококип щую жидкость с растворенным в ней газом, причем угловую скорость вращени  рабочего колеса при испытани х на холодной воде и высококип щей жидкости определ ют по формуле „ ., ,, -, со,,()-()This goal is achieved by using high-boiling liquid with gas dissolved in it as a model liquid, and the angular velocity of rotation of the impeller during tests on cold water and high-boiling liquid is determined by the formula () - ()

Claims (2)

1.Яременко О. В. Испытани  насосов. М., «Машиностроение, 1976, с. 52, рис. 23б,в.1. Yaremenko OV. Testing of pumps. M., “Mechanical Engineering, 1976, p. 52, fig. 23b, c. 2.Баренбойм А. Б. Вли ние физических свойств холодильных агентов на кавитационные  влени  в насосах. «Холодильна  техника , 1965, № 5, с. 50-51. ,2. Barenboim, A. B. The effect of the physical properties of refrigerants on cavitation phenomena in pumps. “Refrigeration equipment, 1965, No. 5, p. 50-51. ,
SU792811043A 1979-08-28 1979-08-28 Method of determining critical cavitation reserve of blade-type pump SU826079A1 (en)

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SU792811043A SU826079A1 (en) 1979-08-28 1979-08-28 Method of determining critical cavitation reserve of blade-type pump

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SU792811043A SU826079A1 (en) 1979-08-28 1979-08-28 Method of determining critical cavitation reserve of blade-type pump

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554832A (en) * 1982-11-10 1985-11-26 Nippon Furnace Kogyo Kaisha, Ltd. Simulator of fluid flow in field of flow entailing combustion or reaction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554832A (en) * 1982-11-10 1985-11-26 Nippon Furnace Kogyo Kaisha, Ltd. Simulator of fluid flow in field of flow entailing combustion or reaction

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