MD725Z - Submersible electric pump - Google Patents

Submersible electric pump Download PDF

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Publication number
MD725Z
MD725Z MDS20130062A MDS20130062A MD725Z MD 725 Z MD725 Z MD 725Z MD S20130062 A MDS20130062 A MD S20130062A MD S20130062 A MDS20130062 A MD S20130062A MD 725 Z MD725 Z MD 725Z
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MD
Moldova
Prior art keywords
electric motor
chamber
annular
communicates
channels
Prior art date
Application number
MDS20130062A
Other languages
Romanian (ro)
Russian (ru)
Inventor
Михаил ВЛАС
Анатолий ЛЯШЕНКО
Олеся КЕЛЕ
Original Assignee
А.О. "Moldovahidromas"
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by А.О. "Moldovahidromas" filed Critical А.О. "Moldovahidromas"
Priority to MDS20130062A priority Critical patent/MD725Z/en
Publication of MD725Y publication Critical patent/MD725Y/en
Publication of MD725Z publication Critical patent/MD725Z/en

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Abstract

The invention relates to the hydraulic mechanical engineering, namely to the submersible electric pumps for pumping polluted waters.The submersible electric pump comprises a pump section and a sealed electric motor (1), disposed in an outer case (7) with the formation of an annular channel (6), equipped with a discharge pipe. Between the electric motor (1) and the pump section is fixed a suction case (4) with a solid inclusion retaining grating (8), which communicates with the chamber of the impeller (3) of the pump section, which communicates with the discharge channels (5 ), made in the case (4), at the same time the channels (5) communicate with the annular channel (6). In the lower bearing shield of the electric motor (1), sealed on its shaft by a seal (2), is made an annular recess, above which is fixed a partition wall (10) with the formation of an annular chamber (9) for the collection of the leakage liquid through the seal (2). The annular chamber (9) communicates with the chamber formed by the seal (2) and the bearing of the electric motor (1) through the through channels (12), made in the bearing shield. In the lower part of the bearing shield is made a hole with a plug (11) for the periodic emptying of the annular chamber (9).

Description

Invenţia se referă la construcţia maşinilor hidraulice, şi anume la pompele electrice submersibile pentru pomparea apelor poluate. The invention relates to the construction of hydraulic machines, namely to submersible electric pumps for pumping polluted water.

Se cunoaşte o pompă electrică submersibilă, care conţine o parte de pompare şi un motor electric ermetic, pe arborele căruia este montată o garnitură, care previne pătrunderea apei în cavitatea motorului electric. Partea de pompare este dotată cu un impulsor, fixat pe arborele motorului electric [1]. A submersible electric pump is known, which comprises a pumping part and a hermetic electric motor, on the shaft of which a seal is mounted, which prevents water from entering the cavity of the electric motor. The pumping part is equipped with an impeller, fixed on the shaft of the electric motor [1].

Dezavantajul pompei constă în faptul că asupra garniturii, care previne pătrunderea apei în cavitatea motorului electric, permanent acţionează presiunea apei pompate, deoarece impulsorul este instalat cu partea sub presiune spre garnitura motorului electric. Aceasta contribuie la accelerarea uzurii de la mărirea forţelor de frecare şi temperaturii pe suprafeţele de etanşare, ceea ce conduce la pătrunderea timpurie a apei de pompare în cavitatea părţii de jos a motorului electric şi în bobina acestuia, care nu este separată de cavitate. În cazul întârzierii scurgerii apei, care a pătruns în cavitatea motorului electric, aceasta conduce la combustia bobinei motorului electric şi la reducerea fiabilităţii motorului electric şi a pompei. The disadvantage of the pump is that the seal, which prevents water from entering the electric motor cavity, is constantly affected by the pressure of the pumped water, since the impeller is installed with the pressure side facing the electric motor seal. This contributes to accelerated wear due to increased friction and temperature on the sealing surfaces, which leads to early penetration of the pumped water into the cavity of the lower part of the electric motor and into its coil, which is not separated from the cavity. In the case of delayed drainage of water that has entered the electric motor cavity, this leads to combustion of the electric motor coil and a decrease in the reliability of the electric motor and the pump.

Problema tehnică pe care o rezolvă invenţia este crearea unei pompe electrice submersibile prin înlăturarea presiunii, creată de partea de pompare, asupra garniturii, împiedicând pătrunderea apei în cavitatea motorului electric, separarea părţii de jos a motorului electric cu bobina lui de camera pentru colectarea lichidului de scurgere prin garnitură, precum şi mărirea fiabilităţii garniturii, motorului electric şi a pompei electrice în întregime. The technical problem solved by the invention is the creation of a submersible electric pump by removing the pressure, created by the pumping part, on the seal, preventing water from entering the cavity of the electric motor, separating the lower part of the electric motor with its coil from the chamber for collecting the liquid leaking through the seal, as well as increasing the reliability of the seal, the electric motor and the electric pump as a whole.

Pompa electrică submersibilă, conform invenţiei, înlătură dezavantajele menţionate mai sus prin aceea că conţine o parte de pompare şi un motor electric ermetic, amplasat într-un corp exterior cu formarea unui canal inelar, dotat cu un racord de evacuare. Între motorul electric şi partea de pompare este fixată o carcasă de aspiraţie cu o grilă pentru reţinerea incluziunilor solide, care comunică cu camera impulsorului părţii de pompare, fixat pe arborele motorului electric. Camera impulsorului comunică cu nişte canale de refulare, executate în carcasa de aspiraţie. Canalele de refulare comunică cu canalul inelar al corpului exterior. În scutul portlagăr de jos al motorului electric, etanşat pe arborele acestuia printr-o garnitură, este executată o adâncitură inelară, deasupra căreia este fixat un perete despărţitor cu formarea unei camere inelare pentru colectarea lichidului de scurgere prin garnitură. Camera inelară comunică cu camera formată de garnitură şi lagărul motorului electric prin nişte canale străpunse, executate în scutul portlagăr. În partea de jos a scutului portlagăr este executat un orificiu cu un dop pentru golirea periodică a camerei inelare. The submersible electric pump, according to the invention, eliminates the above-mentioned disadvantages by containing a pumping part and a hermetic electric motor, located in an outer body with the formation of an annular channel, equipped with an exhaust connection. Between the electric motor and the pumping part, a suction housing with a grid for retaining solid inclusions is fixed, which communicates with the impeller chamber of the pumping part, fixed on the electric motor shaft. The impeller chamber communicates with some discharge channels, made in the suction housing. The discharge channels communicate with the annular channel of the outer body. In the lower bearing shield of the electric motor, sealed on its shaft by a gasket, an annular recess is made, above which a partition is fixed with the formation of an annular chamber for collecting the liquid leaking through the gasket. The annular chamber communicates with the chamber formed by the seal and the electric motor bearing through some pierced channels, made in the bearing shield. At the bottom of the bearing shield, an opening with a plug is made for periodic emptying of the annular chamber.

Ansamblul de elemente esenţiale ale pompei electrice submersibile măreşte fiabilitatea ei, creşte perioada de deservire tehnică a pompei prin scurgerea lichidului din cavitatea motorului electric, simplificând exploatarea acesteia. The set of essential elements of the submersible electric pump increases its reliability, increases the technical service life of the pump by draining the liquid from the electric motor cavity, simplifying its operation.

Invenţia se explică prin desenul din figură, în care este reprezentată pompa electrică submersibilă. The invention is explained by the drawing in the figure, in which the submersible electric pump is represented.

Pompa electrică conţine partea de pompare şi un motor electric ermetic 1, amplasat în corpul exterior 7 cu formarea canalului inelar 6, dotat cu racordul de evacuare. Între motorul electric 1 şi partea de pompare este fixată carcasa de aspiraţie 4 cu grila 8 pentru reţinerea incluziunilor solide, care comunică cu camera impulsorului 3 părţii de pompare, fixat pe arborele motorului electric 1. Camera impulsorului 3 comunică cu canalele de refulare 5, executate în carcasa de aspiraţie 4. Canalele 5 comunică cu canalul inelar 6 al corpului exterior 7. În scutul portlagăr de jos al motorului electric 1, etanşat pe arborele acestuia prin garnitura 2, este executată adâncitura inelară, deasupra căreia este fixat peretele despărţitor 10 cu formarea camerei inelare 9 pentru colectarea lichidului de scurgere prin garnitura 2. Camera inelară 9 comunică cu camera formată de garnitura 2 şi lagărul motorului electric 1 prin canalele străpunse 12, executate în scutul portlagăr. În partea de jos a scutului portlagăr este executat un orificiu cu dopul 11 pentru golirea periodică a camerei inelare 9. Mai jos de garnitura 2, în scutul portlagăr este executată o canelură, cu formarea camerei 13. The electric pump contains the pumping part and a hermetic electric motor 1, located in the outer body 7 with the formation of the annular channel 6, equipped with the exhaust connection. Between the electric motor 1 and the pumping part, the suction housing 4 is fixed with the grid 8 for retaining solid inclusions, which communicates with the impeller chamber 3 of the pumping part, fixed on the shaft of the electric motor 1. The impeller chamber 3 communicates with the discharge channels 5, made in the suction housing 4. The channels 5 communicate with the annular channel 6 of the outer body 7. In the lower bearing shield of the electric motor 1, sealed on its shaft by the gasket 2, the annular recess is made, above which the partition wall 10 is fixed with the formation of the annular chamber 9 for collecting the liquid leaking through the gasket 2. The annular chamber 9 communicates with the chamber formed by the gasket 2 and the bearing of the electric motor 1 through the pierced channels 12, made in the bearing shield. At the bottom of the bearing shield, a hole with a plug 11 is made for periodic emptying of the annular chamber 9. Below the gasket 2, a groove is made in the bearing shield, forming the chamber 13.

Pompa electrică submersibilă funcţionează în modul următor. The submersible electric pump operates in the following way.

La conectarea pompei electrice în funcţionare, motorul electric 1 roteşte impulsorul 3, care prin grila 8 pentru reţinerea incluziunilor solide şi carcasa de aspiraţie 4, aspiră apa şi o trimite la ieşirea din pompă prin canalele 5 şi canalul inelar 6 (direcţia fluxului este indicată în figură). Pătrunderea apei în cavitatea motorului electric 1 este împiedicată de garnitura 2, instalată pe arborele motorului electric 1. Impulsorul 3 este instalat cu partea de aspiraţie spre garnitura 2, iar în camera 13, din faţa garniturii 2, presiunea este egală cu presiunea de aspiraţie, datorită cărui fapt garnitura 2 funcţionează fără sarcini suplimentare de presiune şi este mai fiabilă. Scurgerile prin garnitura 2 reglamentate pătrund în camera inelară 9 pentru colectarea lichidului de scurgere prin canalele străpunse 12, ocolind astfel lagărul motorului electric 1, fără a reduce fiabilitatea lui. When the electric pump is switched on, the electric motor 1 rotates the impeller 3, which, through the grid 8 for retaining solid inclusions and the suction housing 4, sucks in water and sends it to the pump outlet through the channels 5 and the annular channel 6 (the flow direction is indicated in the figure). The penetration of water into the cavity of the electric motor 1 is prevented by the gasket 2 installed on the shaft of the electric motor 1. The impeller 3 is installed with the suction side facing the gasket 2, and in the chamber 13, in front of the gasket 2, the pressure is equal to the suction pressure, due to which the gasket 2 operates without additional pressure loads and is more reliable. Leaks through the regulated gasket 2 enter the annular chamber 9 for collecting the leaking liquid through the through-channels 12, thus bypassing the bearing of the electric motor 1, without reducing its reliability.

Datorită peretelui despărţitor 10 dintre bobina motorului electric 1 şi camera inelară 9, lichidul de scurgere nu pătrunde în partea de jos a bobinei, prevenind astfel combustia motorului electric. Din camera inelară 9 lichidul de scurgere se goleşte periodic prin orificiul cu dopul 11, în conformitate cu normele deservirii tehnice a pompei. Due to the partition 10 between the coil of the electric motor 1 and the annular chamber 9, the leakage liquid does not penetrate into the lower part of the coil, thus preventing combustion of the electric motor. From the annular chamber 9, the leakage liquid is periodically drained through the hole with the plug 11, in accordance with the technical service rules of the pump.

Soluţia tehnică propusă măreşte fiabilitatea pompei electrice, datorită lucrului mai fiabil al garniturii şi excluderii pătrunderii apei la bobina motorului electric, totodată simplifică exploatarea pompei, datorită măririi perioadei de deservire tehnică a pompei electrice. The proposed technical solution increases the reliability of the electric pump, due to the more reliable operation of the seal and the exclusion of water ingress into the electric motor coil, and also simplifies the operation of the pump, due to the increase in the technical service period of the electric pump.

1. Электронасос центробежный погружной ГНОМ 25-20, 2003 <url: http://www.agrovodcom.ru/file/pdf/livgidromash_gnom_25.pdf> (regăsit în Internet la 2013.10.11) 1. Електронасос центробежный погружной ГНОМ 25-20, 2003 <url: http://www.agrovodcom.ru/file/pdf/livgidromash_gnom_25.pdf> (found on the Internet on 2013.10.11)

Claims (1)

Pompă electrică submersibilă, care conţine o parte de pompare şi un motor electric ermetic (1), amplasat într-un corp exterior (7) cu formarea unui canal inelar (6), dotat cu un racord de evacuare; între motorul electric (1) şi partea de pompare este fixată o carcasă de aspiraţie (4) cu o grilă (8) pentru reţinerea incluziunilor solide, care comunică cu camera impulsorului (3) părţii de pompare, fixat pe arborele motorului electric (1); camera impulsorului (3) comunică cu nişte canale de refulare (5), executate în carcasa de aspiraţie (4), totodată canalele (5) comunică cu canalul inelar (6) al corpului exterior (7); în scutul portlagăr de jos al motorului electric (1), etanşat pe arborele acestuia printr-o garnitură (2), este executată o adâncitură inelară, deasupra căreia este fixat un perete despărţitor (10) cu formarea unei camere inelare (9) pentru colectarea lichidului de scurgere prin garnitură (2); camera inelară (9) comunică cu camera formată de garnitură (2) şi lagărul motorului electric (1) prin nişte canale străpunse (12), executate în scutul portlagăr, totodată în partea de jos a acestuia este executat un orificiu cu un dop (11) pentru golirea periodică a camerei inelare (9).Submersible electric pump, which contains a pumping part and a hermetic electric motor (1), located in an outer body (7) with the formation of an annular channel (6), equipped with an exhaust connection; between the electric motor (1) and the pumping part, a suction housing (4) is fixed with a grid (8) for retaining solid inclusions, which communicates with the impeller chamber (3) of the pumping part, fixed on the shaft of the electric motor (1); the impeller chamber (3) communicates with some discharge channels (5), made in the suction housing (4), at the same time the channels (5) communicate with the annular channel (6) of the outer body (7); in the lower bearing shield of the electric motor (1), sealed on its shaft by a gasket (2), an annular recess is made, above which a partition wall (10) is fixed with the formation of an annular chamber (9) for collecting the liquid leaking through the gasket (2); The annular chamber (9) communicates with the chamber formed by the gasket (2) and the electric motor bearing (1) through some pierced channels (12), made in the bearing shield, while at the bottom of it an opening with a plug (11) is made for periodic emptying of the annular chamber (9).
MDS20130062A 2013-04-01 2013-04-01 Submersible electric pump MD725Z (en)

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MDS20130062A MD725Z (en) 2013-04-01 2013-04-01 Submersible electric pump

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Application Number Priority Date Filing Date Title
MDS20130062A MD725Z (en) 2013-04-01 2013-04-01 Submersible electric pump

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MD725Y MD725Y (en) 2014-01-31
MD725Z true MD725Z (en) 2014-08-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD4338C1 (en) * 2013-05-21 2015-10-31 Юрий ЩИГОРЕВ Screw electric pump with autonomous cooling

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD394C2 (en) * 1994-12-29 1996-05-31 Serghei Fursov Electromagnetic displacement doubleacting pump
MD2682F2 (en) * 2002-07-17 2005-01-31 Serghei GHERASIMENCO   Centrifugal pump
MD2960C2 (en) * 2004-11-02 2006-09-30 Дорел ГОЛБАН Glandless centrifugal pump
MD3106G2 (en) * 2005-06-14 2007-02-28 Сергей ГЕРАСИМЕНКО Sealed electric pump
MD3260G2 (en) * 2005-11-02 2008-03-31 Сергей ГЕРАСИМЕНКО Sealed centrifugal electric pump (variants)
MD3860G2 (en) * 2008-04-02 2009-11-30 Институт Сельскохозяйственной Техники "Mecagro" Cavitation generator with centrifugal pump
MD263Z (en) * 2010-03-26 2011-03-31 Сергей ГЕРАСИМЕНКО Sealed electric pump
MD533Z (en) * 2011-05-16 2013-02-28 Inst De Fiz Aplikateh Al Akademiej De Shtiintse A Republichij Moldova Multistage electrohydrodynamic pump
MD631Y (en) * 2012-10-29 2013-04-30 Inst De Fiz Aplikateh Al Akademiej De Shtiintse A Republichij Moldova Electrostatic diaphragm pump
  • 2013

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD394C2 (en) * 1994-12-29 1996-05-31 Serghei Fursov Electromagnetic displacement doubleacting pump
MD2682F2 (en) * 2002-07-17 2005-01-31 Serghei GHERASIMENCO   Centrifugal pump
MD2960C2 (en) * 2004-11-02 2006-09-30 Дорел ГОЛБАН Glandless centrifugal pump
MD3106G2 (en) * 2005-06-14 2007-02-28 Сергей ГЕРАСИМЕНКО Sealed electric pump
MD3260G2 (en) * 2005-11-02 2008-03-31 Сергей ГЕРАСИМЕНКО Sealed centrifugal electric pump (variants)
MD3860G2 (en) * 2008-04-02 2009-11-30 Институт Сельскохозяйственной Техники "Mecagro" Cavitation generator with centrifugal pump
MD263Z (en) * 2010-03-26 2011-03-31 Сергей ГЕРАСИМЕНКО Sealed electric pump
MD533Z (en) * 2011-05-16 2013-02-28 Inst De Fiz Aplikateh Al Akademiej De Shtiintse A Republichij Moldova Multistage electrohydrodynamic pump
MD631Y (en) * 2012-10-29 2013-04-30 Inst De Fiz Aplikateh Al Akademiej De Shtiintse A Republichij Moldova Electrostatic diaphragm pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Электронасос центробежный погружной ГНОМ 25-20, 2003 <url: http://www.agrovodcom.ru/file/pdf/livgidromash_gnom_25.pdf> (regăsit în Internet la 2013.10.11) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD4338C1 (en) * 2013-05-21 2015-10-31 Юрий ЩИГОРЕВ Screw electric pump with autonomous cooling

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