CN102913487B - Motor cooling structure of immersed pump - Google Patents

Motor cooling structure of immersed pump Download PDF

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Publication number
CN102913487B
CN102913487B CN201210324393.2A CN201210324393A CN102913487B CN 102913487 B CN102913487 B CN 102913487B CN 201210324393 A CN201210324393 A CN 201210324393A CN 102913487 B CN102913487 B CN 102913487B
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Prior art keywords
motor
circulation
cooling
pump
liquid
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CN201210324393.2A
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CN102913487A (en
Inventor
王准
丁恒利
邵必勇
黄华昌
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SHANGHAI KAIQUAN PUMP (GROUP) CO Ltd
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SHANGHAI KAIQUAN PUMP (GROUP) CO Ltd
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Abstract

The invention discloses a motor cooling structure of an immersed pump. The motor cooling structure comprises a sealing member, a cooling coil, a circulation impeller, a circulation guide vane and an adjusting device, wherein the adjusting device is communicated with a motor shell; the cooling coil is installed outside the motor shell and immersed inside an sucking channel of the pump body; the upper end of the cooling coil is communicated with the sealing member and the lower end is communicated with the adjusting device; the sealing member is a hollow shell with a reinforced circulation chamber; and a circulation impeller and a circulation guide vane are installed inside the reinforced circulation chamber. The motor cooling structure has the benefits that the motor temperature rising problem is solved; the cooling liquid has a lubrication function to the motor; the motor has strong circulation stability and can work for a long term without changing the cooling liquid; so that the cooling condition of the motor is significantly improved and the period for changing the cooling liquid is prolonged; and the axial load of a main pump bearing is reduced, so that the reliability and the stability of the motor operation are effectively improved. As a result, the operation environment of the motor is improved, the service lives of components and maintenance period of equipment are prolonged; and the expense of a whole project is saved.

Description

A kind of motor cooling of submersible pump
Technical field
Patent of the present invention relates to the cooling structure of electric motor for pump, is related specifically to a kind of motor cooling of submersible pump.
Background technique
Be arranged on the submersible pump in bottom pump hole, underground water seal cave depot cavern, be the key equipment ensureing underground cavern long period, high efficiency, safe and reliable operation, in prior art, the temperature how reducing the stators and rotators of motor is the technical barrier of large-scale submersible pump.Often produce very large heat when the apparatus is in operation, the not good meeting of cooling effect makes temperature sharply raise, too high temperature not only can cause rotor expanded by heating, gap between rotor and stator reduces, and causes the severe friction of rotor and stator, motor component metallicity also can be caused to decline, intensity reduces, thus easily damage, cause the deterioration of equipment working condition, motor is aging rapidly;
In addition, temperature rising can cause the viscosity of lubricant oil to decline, and destroys oil film, causes engine lubrication to worsen, thus damages motor, and parts damages make the non-maintaining phase shorten, and cost is raised.Therefore, when engine operation, the heat that it produces must be dissipated in time.
Moreover the parameter request such as discharge capacity, lift, working time is high, and bearing belongs to the higher parts of spoilage, because the bearing in equipment often will bear very large axial force, so it is also crucial for how reducing the axial force that bearing bears.
Moreover the heat that the cooling liquid of existing submersible pump inside absorbs only relies on motor casing to radiate, and cooling effect is not good enough.
Summary of the invention
The object of the present invention is to provide a kind of motor cooling of submersible pump, it by arranging liquid circulation cooling coil between sealed member and controlling device, and by being arranged on circulation impeller in sealed member and circulation stator applies pump circulation, cooling liquid is circulated by circulating cooling coil pipe, the current be recycled outside cooling coil are taken away cold, and then are improve cooling effect.
Moreover the axial force that another object of the present invention is to circulation impeller generation can offset the axial force of part pump impeller itself.
Technical problem solved by the invention can realize by the following technical solutions:
A motor cooling for submersible pump, comprises link press span, the pump housing and motor component, and the bottom of link press span is connected by fastening piece with the top of the pump housing, be fixed with a motor component supporting base in the bottom of the pump housing, motor component to be arranged on motor component supporting base and to be positioned at the inside of the pump housing, motor component supporting base offers water intake, and the space between motor component and pump housing inwall forms suction passage, and the bottom of link press span is provided with suction port, and suction passage is connected with water intake with suction port, motor component comprises a cooling liquid controlling device, be fixed on the motor cabinet in cooling liquid controlling device, be fixed on the motor casing on motor cabinet, be fixed on the bearing bracket stand on motor casing, be fixed on the sealed member on bearing bracket stand, be arranged on the thrust bearing part in the space between bearing bracket stand and sealed member, be supported on motor cabinet, bearing bracket stand, pump shaft on thrust bearing part and sealed member, rotor is fixed with at the middle part of pump shaft, the periphery of rotor is provided with stator, stator is fixed on motor casing, motor cabinet is provided with the lower through-hole be communicated with cooling liquid controlling device by motor casing, gap is provided with between rotor and stator, bearing bracket stand is provided with the upper through hole be communicated with space by motor casing, the cooling liquid entered in cooling liquid controlling device passes through lower through-hole, gap and upper through hole are full of in motor casing and in space, be positioned at above thrust bearing part and delimit out a pump circulation chamber in space, forced seal chamber is positioned at the below of sealed member, a liquid circulation cooling-part is connected between sealed member with cooling liquid controlling device, liquid circulation cooling-part is arranged in outside motor casing, suction passage, the upper end of this liquid circulation cooling-part is communicated with pump circulation chamber, and the lower end of liquid circulation cooling-part is communicated with cooling liquid controlling device inside, also be provided with in pump circulation chamber and be fixed on pump shaft and the circulation impeller be positioned at above thrust bearing part and circulation stator, circulation stator is positioned at the bottom of circulation impeller, when pump shaft drives circulation impeller and circulation stator to rotate, circulation impeller and circulation stator force cooling liquid to form circulation between liquid circulation cooling-part and motor component inside.
In a preferred embodiment of the invention, circulation impeller is oppositely install, and can also balance a part of axial force while suction cooling liquid.
In a preferred embodiment of the invention, to be also provided with in pump circulation chamber on fixing pump shaft and the guide plate be positioned at above circulation impeller.
In a preferred embodiment of the invention, liquid circulation cooling-part is liquid circulation cooling-part is the liquid circulation cooling coil rotated around motor casing.
In a preferred embodiment of the invention, liquid circulation cooling coil is the parallel setting of two-way.
Beneficial effect of the present invention is:
The current utilizing the pump housing to suck dispel the heat to liquid circulation cooling coil thus solve electric machine temperature rise problem, cooling liquid also can play lubrication to motor, cyclical stability is strong, can adhere to that long-term operation need not change cooling liquid, significantly improve the cool condition of motor and extend the cycle changing cooling liquid; The circulation impeller of reverse installation counteracts the axial force that part pump impeller produces, reduce pump main bearing axial load; Effective raising motor reliability of operation and stability, improve motor running environment, elongate member working life and plant maintenance cycle, for whole project investment is reduced expenses.
Accompanying drawing explanation
Fig. 1 is the motor cooling sectional view in the axial direction in actual applications of a kind of submersible pump of the present invention.
Fig. 2 is the partial enlarged drawing of the motor cooling structure of a kind of submersible pump of the present invention.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
As depicted in figs. 1 and 2, the present invention includes link press span 160, the pump housing 600 and motor component, the bottom of link press span 160 is connected by fastening piece with the top of the pump housing 600.
Motor component comprises the cooling liquid controlling device 400 being arranged on the pump housing 600 inside, submersible electric motor 200, motor cabinet 240, motor casing 260, bearing bracket stand 170, thrust bearing part 700, on the supporting base 610 that cooling liquid controlling device 400 adopts bolt to be fixedly mounted on bottom the pump housing 600, motor cabinet 240 adopts bolt to be fixedly mounted in cooling liquid controlling device 400, motor casing 260 adopts bolt to be fixedly mounted on motor cabinet 240, bearing bracket stand 170 adopts bolt to be fixedly mounted on motor casing 260, sealed member 100 adopts bolt to be fixedly mounted on bearing bracket stand 170, thrust bearing part 700 is arranged in the space between bearing bracket stand 170 and sealed member 100.The pump shaft 140 be supported on motor cabinet 240, bearing bracket stand 170, thrust bearing part 600 and sealed member 100 is also provided with in the pump housing 600, the rotor 210 of submersible electric motor 200 is fixed with at the middle part of pump shaft 140, the periphery of rotor 210 is provided with stator 220, and stator 220 is fixed on motor casing 260 inwall.The gap flow through for cooling liquid is had between rotor 210 and stator 220.
Supporting base 610 offers water intake 611, space between the outer wall of whole motor component and the pump housing 600 inwall forms suction passage 620, the bottom of link press span 160 is provided with suction port 161, and suction passage 620 is connected with water intake 611 with suction port 161.
Cooling liquid controlling device 400 adopts bolt to be fixedly mounted on supporting base 610.Cooling liquid controlling device 400 is one in order to store cooling liquid and the container regulated coolant pressure, and flange plate 410 center bottom it offers a cooling liquid inlet 411 and blowdown bolt 412, and after cooling liquid is injected, cooling liquid inlet 411 is closed.
Motor cabinet 240 is made up of the flange plate 241 be integrated into and axle sleeve 242, the center of flange plate 241 and axle sleeve 242 is provided with axis hole 243, pump shaft 140 passes from axis hole 243, is provided with properties of journal bearing lubricated 244 between the hole wall shaft part corresponding to pump shaft 140 of axis hole 243.Flange plate 241 is provided with the through hole 245 be communicated with cooling liquid controlling device 400 motor casing 260 inside, and the cooling liquid of cooling liquid controlling device 400 inside flow into motor casing 260 inside by this through hole 235.
Bearing bracket stand 170 have a flange plate 171 be connected with motor casing 260 and by this flange plate 171 up and down two ends extend axle sleeve 172, sealed member supporting portion 173, axis hole 174 is provided with in flange plate 171 and axle sleeve 172, pump shaft 140 is passed by this axis hole 174, is provided with upper sliding bearing 180 between the inwall shaft part corresponding to pump shaft 140 of axis hole 174.Flange plate 171 offer by inner for motor casing 260 through hole 175 be communicated with inside, sealed member supporting portion 173, the cooling liquid of motor casing 260 inside flow into inside, sealed member supporting portion 173, to cool the thrust bearing part 700 of inside, sealed member supporting portion 173 by this through hole 175.Bearing bracket stand 170 is also provided with motor lead-out wire perforation 176, and the motor lead-out wire 221 on stator 220 is passed by this motor lead-out wire perforation 176.
Thrust bearing part 700 is positioned at the inside of sealed member supporting portion 173, it comprises thrust-bearing 710, thrust collar 720, thrust-bearing cover plate 730, on the flange plate 171 that thrust-bearing 710 is arranged on bearing bracket stand 170 and axle is located on pump shaft 140, thrust collar 720 to be fixed on pump shaft 140 and to be supported on thrust-bearing 710; Thrust-bearing cover plate 730 adopts bolt to be fixedly mounted on sealed member supporting portion 173, and coordinates with thrust-bearing 710 and carry out axial position restriction to thrust collar 720.Thrust collar 720 offers the through hole 721 flow through for part cooling liquid.
Sealed member 100 adopts bolt to be fixedly mounted on sealed member supporting portion 173, axis hole 101 is provided with in the center of sealed member 100, the pump shaft 140 of submersible pump passes from this axis hole 101, and is also provided with mechanical seal 150 between the corresponding shaft part of pump shaft 140 and the fitting surface of through hole 101.A pump circulation chamber 190 delimited out in sealed member 100 bottom, be furnished with in pump circulation chamber 190 and be fixed on circulation impeller 110 on pump shaft 140 and circulation stator 120, circulation stator 120 is positioned at the bottom of circulation impeller 110, and circulation impeller 110 is oppositely install.
In pump circulation chamber, 190 are also provided with guide plate 130, and guide plate 130 is screwed on sealed member 100, in order to the cooling liquid entering pump circulation chamber 190 is directed to its both sides.
Sealed member 100 wall of both sides, pump circulation chamber 190 is respectively equipped with through hole 140a and 140b.
Cooling coil 300 to be arranged in outside motor casing 260 and to be immersed in suction passage 620, is double flow channel structure, is looped around in the shape of a spiral around motor casing 260, and be fixed on motor casing 260 by fixed component 301a, 301b; Two interfaces of its upper end respectively by L shape ell 310c with 310d and sealed member 100 both sides sealed member 100 wall on through hole 140a with 140b be connected, lower end is connected with through hole 410a with 410b of cooling liquid controlling device 400 both sides respectively by L shape ell 310a with 310b.
The cooling liquid of cooling liquid controlling device 400 inside flow into motor casing 260 inside by this through hole 235 and is full of whole motor casing 260 inside by the gap between rotor 210 and stator 220, the cooling liquid of motor casing 260 inside flow into inside, sealed member supporting portion 173 by through hole 175 again and is full of, to cool the thrust bearing part 700 of inside, sealed member supporting portion 173.The cooling liquid of inside, sealed member supporting portion 173 is flow in pump circulation chamber 190 by the through hole 721 on thrust collar 720.
When pump shaft 140 drives circulation impeller 110 and circulation stator 120 to rotate, circulation impeller 110 and circulation stator 120 force cooling liquid to form circulation between cooling coil 300 and motor component inside.
During submersible pump work, submersible electric motor 200 drives pump impeller to rotate by pump shaft 140 and makes current enter the suction passage 620 of the pump housing 600 by water intake 510, drive circulation impeller 110 and circulation stator 110 to rotate simultaneously.
Cooling liquid flows through from the gap between stator 220 and rotor 210, takes away submersible electric motor 200 heat, also plays lubrication between stator 220 and rotor 210 simultaneously; At this moment cooling liquid absorbs the heat of stator 220 and rotor 210, temperature raises gradually, these high temperature coolants are under circulation impeller 110 and circulation stator 120 act on, be pumped down in the pump circulation chamber 190 of sealed member 100 through bearing bracket stand 170 by motor casing 260, then enter cooling coil 300 by through hole 140a and 140b; Because cooling coil 300 is immersed in the middle of the circulating water of suction passage 520, the heat of cooling liquid can be taken away by current very soon, moreover, because the area of cooling coil 300 is comparatively large, the heat radiation of submersible electric motor 200 also can be accelerated; Cryogenic liquid again enters cooling liquid controlling device 400 under the effect of circulation impeller 110 and circulation stator 120, enters next round circulation.
Moreover, because the circulation impeller 110 in sealed member 100 is oppositely install, when equipment operation, circulation impeller 110 can offset the axial force that a part of pump impeller produces, thus the axial load that minimizing part thrust-bearing 710 bears, extend the working life of thrust-bearing 710.
More than show and describe basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (5)

1. a motor cooling for submersible pump, comprises link press span, the pump housing and motor component, and the bottom of described link press span is connected by fastening piece with the top of the pump housing; Be fixed with a motor component supporting base in the bottom of the described pump housing, described motor component to be arranged on described motor component supporting base and to be positioned at the inside of the described pump housing; Described motor component supporting base offers water intake, and the space between described motor component and described pump housing inwall forms suction passage, and the bottom of link press span is provided with suction port, and described suction passage is connected with water intake with described suction port;
Described motor component comprises a cooling liquid controlling device, be fixed on the motor cabinet in described cooling liquid controlling device, be fixed on the motor casing on described motor cabinet, be fixed on the bearing bracket stand on described motor casing, be fixed on the sealed member on described bearing bracket stand, be arranged on the thrust bearing part in the space between described bearing bracket stand and sealed member, be supported on described motor cabinet, bearing bracket stand, pump shaft on thrust bearing part and sealed member, rotor is fixed with at the middle part of described pump shaft, the periphery of rotor is provided with stator, stator is fixed on motor casing, it is characterized in that,
Described motor cabinet is provided with the lower through-hole be communicated with cooling liquid controlling device by motor casing, gap is provided with between described rotor and stator, described bearing bracket stand is provided with the upper through hole be communicated with the space between sealed member with described bearing bracket stand by motor casing, the cooling liquid entered in cooling liquid controlling device is full of in the space in motor casing and between described bearing bracket stand and sealed member by described lower through-hole, described gap and described upper through hole; Be positioned at above described thrust bearing part and delimit out a pump circulation chamber in space between described bearing bracket stand and sealed member, described pump circulation chamber is positioned at the below of described sealed member; A liquid circulation cooling-part is connected between described sealed member with described cooling liquid controlling device, described liquid circulation cooling-part is arranged in outside described motor casing, suction passage, the upper end of this liquid circulation cooling-part is communicated with described pump circulation chamber, and the lower end of liquid circulation cooling-part is communicated with cooling liquid controlling device inside; Also be provided with in described pump circulation chamber and be fixed on described pump shaft and the circulation impeller be positioned at above described thrust bearing part and circulation stator, described circulation stator is positioned at the bottom of circulation impeller, when described pump shaft drives circulation impeller and circulation stator to rotate, circulation impeller and circulation stator force cooling liquid to form circulation between liquid circulation cooling-part and motor component inside.
2. the motor cooling of a kind of submersible pump as claimed in claim 1, is characterized in that, described circulation impeller is oppositely install, and can also balance a part of axial force while suction cooling liquid.
3. the motor cooling of a kind of submersible pump as claimed in claim 1, is characterized in that, to be also provided with on fixing described pump shaft and the guide plate be positioned at above described circulation impeller in described pump circulation chamber.
4. the motor cooling of a kind of submersible pump as claimed in claim 1, is characterized in that, described liquid circulation cooling-part is the liquid circulation cooling coil rotated around motor casing.
5. the motor cooling of a kind of submersible pump as claimed in claim 1, is characterized in that, described liquid circulation cooling coil is the parallel setting of two-way.
CN201210324393.2A 2012-09-04 2012-09-04 Motor cooling structure of immersed pump Active CN102913487B (en)

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Application Number Priority Date Filing Date Title
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CN102913487B true CN102913487B (en) 2015-04-01

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103939360B (en) * 2014-05-05 2017-03-29 湘潭金阳电机泵业有限公司 Compression type recirculated water cooling submersible pump
CN104065210B (en) * 2014-06-25 2016-06-01 古春林 The underground heat submersible machine of scatterer is put on a kind of

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178087A1 (en) * 1984-09-20 1986-04-16 Framo Developments (U.K.) Limited Submersible pump head cooling means
JP2001304170A (en) * 2000-04-28 2001-10-31 Kubota Corp Submerged pump
JP2007085309A (en) * 2005-09-26 2007-04-05 Torishima Pump Mfg Co Ltd Submerged motor pump
CN201502540U (en) * 2009-08-17 2010-06-09 启东市天源泵业有限公司 Submersible sewage pump
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CN101846085A (en) * 2010-06-08 2010-09-29 江苏大学 Frequency conversion high-speed wet type submersible pump
WO2011106111A3 (en) * 2010-02-26 2012-01-19 Flowserve Management Company Cooling system for a multistage electric motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178087A1 (en) * 1984-09-20 1986-04-16 Framo Developments (U.K.) Limited Submersible pump head cooling means
JP2001304170A (en) * 2000-04-28 2001-10-31 Kubota Corp Submerged pump
JP2007085309A (en) * 2005-09-26 2007-04-05 Torishima Pump Mfg Co Ltd Submerged motor pump
CN201502540U (en) * 2009-08-17 2010-06-09 启东市天源泵业有限公司 Submersible sewage pump
CN201535254U (en) * 2009-11-13 2010-07-28 大连环友屏蔽泵有限公司 Peripheral canned pump
WO2011106111A3 (en) * 2010-02-26 2012-01-19 Flowserve Management Company Cooling system for a multistage electric motor
CN101846085A (en) * 2010-06-08 2010-09-29 江苏大学 Frequency conversion high-speed wet type submersible pump

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