CN101303027A - Vertical type multilevel barrel bag pump - Google Patents

Vertical type multilevel barrel bag pump Download PDF

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Publication number
CN101303027A
CN101303027A CNA2008100628551A CN200810062855A CN101303027A CN 101303027 A CN101303027 A CN 101303027A CN A2008100628551 A CNA2008100628551 A CN A2008100628551A CN 200810062855 A CN200810062855 A CN 200810062855A CN 101303027 A CN101303027 A CN 101303027A
Authority
CN
China
Prior art keywords
pump
impeller
double
vertical type
suction
Prior art date
Application number
CNA2008100628551A
Other languages
Chinese (zh)
Inventor
余伟平
牟介刚
罗先武
Original Assignee
浙江水泵总厂有限公司
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 浙江水泵总厂有限公司 filed Critical 浙江水泵总厂有限公司
Priority to CNA2008100628551A priority Critical patent/CN101303027A/en
Publication of CN101303027A publication Critical patent/CN101303027A/en

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Abstract

The invention discloses a vertical multi-level barrel pump which is characterized in that a first level absorption section of the barrel pump adopts a dual absorption impeller and a first level pump body matched with the dual absorption impeller and provided with a dual channel and a radial volute shell; the rotating shafts above and under the dual absorption impeller are respectively provided with a preposed inducer and an absorption guide pipe matched with the preposed inducer so as to realize the dual absorption of pumped fluid. Under the condition that the flow is limited, the value r of net positive suction head (NPSH) can be reduced by more than 1.5m, namely the cavitation corrosion performance is remarkably improved, thereby not only reducing the height and volume of the barrel and the manufacturing cost, but also improving the efficiency and the operation reliability of the pump and bringing convenience for the installation and the maintenance of the pump.

Description

A kind of vertical type multilevel barrel bag pump
Technical field
The present invention relates to be used for the vertical type multilevel barrel bag pump that the steam turbine condensed water is pumped or high vacuum seal container liquid is pumped vertical type multilevel barrel bag pump, especially chopped-off head have two-way intake function.
Background technique
At present, the chopped-off head suction casing of the vertical type multilevel barrel bag pump that the home and abroad produces adopts single suction impeller mostly.For the cavitation performance (promptly reducing the NPSHr value) that improves pump, the example that adopts double-entry impeller at the chopped-off head suction casing is also arranged, LN25-110 type condensate pump as the production of Shenyang industrial pump Manufacturing Co., Ltd, the symmetrical single channel volute formation that its chopped-off head suction casing adopts double-entry impeller and is complementary with it, though the vertical type multilevel barrel bag pump of this structure has improved the cavitation performance of pump to a certain extent, but still there is deficiency: the one, because preposition inducer is not set, fluid does not get a promotion in the inlet pressure of double-entry impeller, has influenced the cavitation performance of pump; The 2nd, because double-entry impeller descends the outer rim of impeller jointing place not form dividing plate thereon, the fluid of Xi Ruing easily forms mixed flow in the outlet port of impeller up and down, has reduced the cavitation performance of pump; The 3rd, symmetrical single channel volute volume is big, complex structure, and the fluid energy loss is big, imports the poor performance of next stage, has influenced the further raising of pump efficiency.
Summary of the invention
The purpose of this invention is to provide a kind of high cavitation performance, high efficiency vertical type multilevel barrel bag pump, its chopped-off head has two-way intake function, in augmented flow, can obtain higher cavitation performance and operational efficiency.
The present invention adopts following technological scheme: described vertical type multilevel barrel bag pump comprises the fundamental composition of general vertical type multilevel barrel bag pumps such as rotating shaft, bearing, the back level pump housing and impeller, tube bag and water-in and water-out pipe support, it is characterized in that, also comprise and have the radially chopped-off head pump housing of volute of double flow channel, be positioned at double flow channel radially in the rotating shaft at volute center, double-entry impeller is housed, in the rotating shaft of double-entry impeller upper and lower, respectively be provided with a preposition inducer, inducer places the suction lead that is complementary with it, and suction lead is connected with the chopped-off head pump housing.The effect of preposition inducer is to improve the pressure that enters the double-entry impeller fluid, thereby improves the cavitation performance of pump.Above-mentioned double-entry impeller is on the basis of single suction impeller, the back side with single suction impeller is the minute surface axis, mirror image symmetry and forming up and down, in the jointing place of impeller up and down, be to form dividing plate on the minute surface axis, the fluid of having avoided so effectively sucking up and down produces mixed flow at the impeller outlet place, thereby has improved the cavitation performance of pump.On the inwall of suction lead, lining is housed,,, reduces capacity of reflux, improve the efficient of pump to form throttling damping sealing by the gap between control inducer and the lining.Suction lead and double flow channel radially the inwall of volute joint seal ring is housed, by the gap between control double-entry impeller inlet and the seal ring, form throttling damping sealing, reduce capacity of reflux, improve the efficient of pump.The chopped-off head pump housing by be positioned on the concentric axis double flow channel radially volute, go up suction lead, and with double flow channel radially the honeycomb duct that is communicated with of volute, back of the body stator housing are formed, following suction lead is fastened and connected by bolt and chopped-off head pump housing lower end suction port, and chopped-off head pump housing upper end can be fastened and connected with the entry end of the back level pump housing by bolt.Because the present invention has adopted radially volute of double flow channel, not only the fluid energy loss is little, and the performance that imports next stage is good; And because pump body structure is simple, volume has been dwindled in more former design, has reduced the obstruction of convection cell, the two-way suction of the fluid of being more convenient for, thus improved the efficient and the cavitation performance of pump.
The vertical type multilevel barrel bag pump that the present invention is alleged, setting under the flow rate condition, its net positive suction head NPSHr value can reduce more than the 1.5m, be that cavitation performance significantly improves, the tube bag height and the volume of pump have not only been shortened, reduced manufacture cost, and improved the efficient and the operational reliability of pump, also brought convenience for the installation and maintenance of pump.
Description of drawings
Fig. 1 is a kind of vertical type multilevel barrel bag pump Lower Half structural profile schematic representation of the present invention, and because of the water-in and water-out pipe support of its first half, structures such as axle envelope, bearing and lubrication system are identical with in the past vertical type multilevel barrel bag pump structure, so with omission.
Fig. 2 is a chopped-off head pump housing flow passage structure generalized section.
Embodiment
Its first half structure of vertical type multilevel barrel bag pump of the present invention is identical with in the past vertical type multilevel barrel bag pump, so do not give unnecessary details at this.With reference to shown in Figure 1, the present invention includes fundamental compositions such as rotating shaft 4, the back level pump housing 3 and impeller 2, tube bag 1, also comprise and have the radially chopped-off head pump housing 5 of volute 5-3 of double flow channel, be positioned at double flow channel radially in the rotating shaft 4 at volute 5-3 center, double-entry impeller 10 is housed, respectively be provided with preposition inducer 6-1, a 6-2 in the rotating shaft 4 of double-entry impeller 10 upper and lowers, inducer 6-1,6-2 place suction lead 5-1, the 5-2 that is complementary with it, and suction lead 5-1,5-2 are connected with the chopped-off head pump housing 5.Above-mentioned double-entry impeller 10 is on the basis of single suction impeller, is the minute surface axis with the back side of single suction impeller, up and down mirror image symmetry and forming.Lining 7-1,7-2 are housed on the inwall of suction lead 5-1,5-2, and the gap by between control inducer 6-1,6-2 and lining 7-1, the 7-2 to form throttling damping sealing, reduces capacity of reflux, improves the efficient of pump.Suction lead 5-1,5-2 and double flow channel radially the inwall of volute 5-3 joint seal ring 8-1,8-2 are housed, by the gap between control double-entry impeller 10 inlets and seal ring 8-1, the 8-2, form throttling damping sealing, reduce capacity of reflux, improve the efficient of pump.
With reference to shown in Figure 2, the chopped-off head pump housing 5 by be positioned on the concentric axis double flow channel radially volute 5-3, go up suction lead 5-1, and with double flow channel radially the honeycomb duct 5-4 that is communicated with of volute 5-3, back of the body stator housing 5-5 form, following suction lead 5-2 is fastened and connected by bolt 9 and the chopped-off head pump housing 5 lower end suction ports, and the chopped-off head pump housing 5 upper ends can be fastened and connected with the entry end of the back level pump housing 3 by bolt 11.
Working procedure
When pump work, rotating shaft 4 drives double-entry impeller 10, inducer 6-1,6-2 rotate synchronously, is sucked from upper and lower suction lead 5-1,5-2 by the liquid of pumping, and through inducer 6-1,6-2, promotes its pressure; Through double-entry impeller 10, improve its kinetic energy, again by double flow channel radially volute 5-3 kinetic energy is converted into pressure potential, through honeycomb duct 5-4, back of the body stator housing 5-5, liquid is imported into back level impeller then.All the other working principles repeat no more with vertical type multilevel barrel bag pump was identical in the past.

Claims (5)

1, a kind of vertical type multilevel barrel bag pump, comprise fundamental compositions such as rotating shaft 4, the back level pump housing 3 and impeller 2, tube bag 1, it is characterized in that it also comprises having the radially chopped-off head pump housing 5 of volute 5-3 of double flow channel, be positioned at double flow channel radially in the rotating shaft 4 at volute 5-3 center, double-entry impeller 10 is housed, in the rotating shaft 4 of double-entry impeller 10 upper and lowers, respectively be provided with preposition inducer 6-1, a 6-2, inducer 6-1,6-2 place suction lead 5-1, the 5-2 that is complementary with it, and suction lead 5-1,5-2 are connected with the chopped-off head pump housing 5.
2, vertical type multilevel barrel bag pump according to claim 1 is characterized in that described double-entry impeller 10 is on the basis of single suction impeller, is the minute surface axis with the back side of single suction impeller, up and down mirror image symmetry and forming.
3, vertical type multilevel barrel bag pump according to claim 1 is characterized in that on the inwall of described suction lead 5-1,5-2 lining 7-1,7-2 being housed.
4, according to claim 1 or 3 described vertical type multilevel barrel bag pumps, it is characterized in that suction lead 5-1,5-2 and double flow channel radially the inwall of volute 5-3 joint seal ring 8-1,8-2 are housed.
5, vertical type multilevel barrel bag pump according to claim 1, it is characterized in that the chopped-off head pump housing 5 by be positioned on the concentric axis double flow channel radially volute 5-3, go up suction lead 5-1, and with double flow channel radially the honeycomb duct 5-4 that is communicated with of volute 5-3, back of the body stator housing 5-5 form, following suction lead 5-2 is fastened and connected by bolt 9 and the chopped-off head pump housing 5 lower end suction ports, and the chopped-off head pump housing 5 upper ends can be fastened and connected with the entry end of the back level pump housing 3 by bolt 11.
CNA2008100628551A 2008-06-30 2008-06-30 Vertical type multilevel barrel bag pump CN101303027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100628551A CN101303027A (en) 2008-06-30 2008-06-30 Vertical type multilevel barrel bag pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100628551A CN101303027A (en) 2008-06-30 2008-06-30 Vertical type multilevel barrel bag pump

Publications (1)

Publication Number Publication Date
CN101303027A true CN101303027A (en) 2008-11-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2008100628551A CN101303027A (en) 2008-06-30 2008-06-30 Vertical type multilevel barrel bag pump

Country Status (1)

Country Link
CN (1) CN101303027A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2469217A (en) * 2007-10-30 2010-10-06 Richard Julius Gozdawa Vertical multi-stage gas compressor
CN103742442A (en) * 2014-01-13 2014-04-23 欧尚军 Forward and reverse water absorption wheel
CN103758762A (en) * 2014-02-13 2014-04-30 山东长志泵业有限公司 Feeding pump for delay coking heating furnace
CN104214127A (en) * 2014-09-19 2014-12-17 无锡太博泵业有限公司 Tightening device for connection of water pump cavities
CN105782066A (en) * 2016-04-11 2016-07-20 郭学文 Double-suction and multi-stage centrifugal pump
CN106089742A (en) * 2016-07-12 2016-11-09 武汉船用机械有限责任公司 Immersed pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2469217A (en) * 2007-10-30 2010-10-06 Richard Julius Gozdawa Vertical multi-stage gas compressor
GB2469217B (en) * 2007-10-30 2012-01-11 Richard Julius Gozdawa Vertical multi-stage gas compressor
CN103742442A (en) * 2014-01-13 2014-04-23 欧尚军 Forward and reverse water absorption wheel
CN103758762A (en) * 2014-02-13 2014-04-30 山东长志泵业有限公司 Feeding pump for delay coking heating furnace
CN104214127A (en) * 2014-09-19 2014-12-17 无锡太博泵业有限公司 Tightening device for connection of water pump cavities
CN105782066A (en) * 2016-04-11 2016-07-20 郭学文 Double-suction and multi-stage centrifugal pump
CN106089742A (en) * 2016-07-12 2016-11-09 武汉船用机械有限责任公司 Immersed pump
CN106089742B (en) * 2016-07-12 2017-12-15 武汉船用机械有限责任公司 Immersed pump

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Open date: 20081112