CN100572821C - A kind of efficient high-pressure horizontal multi-stage centrifugal pump - Google Patents
A kind of efficient high-pressure horizontal multi-stage centrifugal pump Download PDFInfo
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- CN100572821C CN100572821C CNB2007100243982A CN200710024398A CN100572821C CN 100572821 C CN100572821 C CN 100572821C CN B2007100243982 A CNB2007100243982 A CN B2007100243982A CN 200710024398 A CN200710024398 A CN 200710024398A CN 100572821 C CN100572821 C CN 100572821C
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Abstract
A kind of efficient high-pressure horizontal multi-stage centrifugal pump, relate to the centrifugal pump technical field, comprise suction casing, stage casing, stator, impeller, pump shaft, water lubriucated bearing, outlet section, axial force balance mechanism and sealing etc., the radial arrangement that it is characterized in that pump intake all horizontal type multi-stage pumps different from the past, and be axial arranged, improved the hydraulic efficiency of first stage impeller and the cavitation performance of pump greatly; Pump adopts fluid lubricated bearing, adopts fed sheet of a media lubricated, and the liquid lubrication axle is installed in hydraulic part inside; The sliding bearing of close outlet section plays the effect of the balance hub of balancing axial thrust simultaneously again, constitutes axial force automatic balancing mechanism with Balance disc; Pump adopts the internal liquid sliding bearing, has only a shaft extension, and compact structure only needs a cover sealing.Have that friction pair is few, efficient is high, good reliability, few easy workout part, be convenient to the advantage of fast assembling-disassembling.The present invention is applicable to the occasion that all carry clean liquid.
Description
Technical field
The invention belongs to the centrifugal pump technical field, particularly a kind of efficient high-pressure horizontal multi-stage centrifugal pump, being mainly used in the above reverse osmosis seawater desalting process units of ton provides seawater reverse osmosis saturating high-pressure energy, also can be applied to the conveying of cleaning medium.
Background technique
In the reverse osmosis seawater desalting process units, provide the power consumption of the high-pressure service pump of reverse osmosis pressure to account for to have suffered and produce 70% of power consumption in the current journey, therefore, the height of high-pressure service pump efficient directly influences the desalination of sea water ton and produces the water price lattice, and the process units overwhelming majority is that unattended and no professional equipment is safeguarded and the maintenance man, so, efficient requirement, reliability and the maintenance aspect to pump requires all very high.It mainly is multistage centrifugal pump that the high-pressure service pump of reverse osmosis pressure is provided in the above reverse osmosis seawater desalting process units of ton, traditional multistage centrifugal pump adopts twin shaft to stretch structure, because the characteristics of structure, need longer thicker axle, the pump inlet diameter just needs more large scale, directly influences the efficient of pump.Outside rolling bearing or pressure oil lubrication sliding bearing structure are generally adopted in the support of pump, need the cooling system of a cover sliding bearing oil supply system or rolling bearing, complex structure; Twin shaft is stretched structure respectively needs a cover mechanical seal at the inlet segment and the water exit end of pump, has reduced the reliability of pump; Changing mechanical seal and Balance disc, hub will disintegrate to pump comprehensively, must be furnished with specialty and safeguard and the maintenance man, and need more multidimensional and repair the time, can not satisfy the requirement of quick maintenance.
Summary of the invention
Low in order to solve in the prior art efficient, complex structure, the deficiency of maintenance difficult, the invention provides a kind of efficient high-pressure horizontal multi-stage centrifugal pump, be by water inlet and outlet parts-inlet segment, water exit end, hydraulic part-the first stage impeller of transformation of energy, stator, the stage casing, secondary impeller, axial force automatic balancing device-sliding bearing (discharging section), balance hub-bearing, wear ring, Balance disc, reflow pipe, supporting part-sliding bearing (suction casing), axle sleeve, mechanical seal parts-bonnet, mechanical seal and coupling-impeller nut, the rod bolt is formed, the import that it is characterized in that multistage centrifugal pump changes axial suction into by traditional radially suction, supporting part is by the fluid lubricated bearing substituted metal bearing that is arranged on hydraulic part inside, axial force automatic balancing device adopts sliding bearing as balancing drum, hydraulic part is by the impeller of chopped-off head cantilever configuration and the secondary impeller and the stator of freely-supported, the stage casing constitutes, the chopped-off head stator is simultaneously as bearing spider, cancel an end shaft extension, only needed a cover mechanical seal sealing.
Import is axially to suck, and the first stage impeller cantilever configuration has improved the cavitation performance of first stage impeller efficient and pump greatly; Single shaft is stretched structure only needs a cover mechanical seal sealing, has improved the pump maintainability; Be arranged on the fluid lubricated bearing of hydraulic part inside, the substituted metal bearing adopts self mother liquor cooling and lubricated, owing to cancelled outside supporting structure, axial dimension can shorten greatly, under the same stiffness situation, can reduce the diameter of axle of pump, general structure is compacter, pump weight is lighter, structure is simpler, and changing easily damaged parts only needs partial disassembly, does not need pump is disintegrated comprehensively.New and effective multistage centrifugal pump has satisfied the above desalination of sea water high pressure of ton pump performance, efficient, cavitation requirement, and reliability and maintenance improve greatly, carries the occasion of cleaning medium at other, and new and effective multistage centrifugal pump also is suitable for.
Description of drawings
Fig. 1 is the specific embodiments of the invention sectional drawings
Among Fig. 1,1. 6. 10. 11. rod bolt 12. sliding bearings of 9. the level impellers in axle sleeve 7. keys, 8. stage casings (discharge section), 13. balance hub-bearing 14. wear rings 15. Balance discs 16. bonnets 17. mechanical seals 18. reflow pipes 19. water exit ends of impeller nut 2. inlet segments 3. first stage impeller 4. stators, 5. sliding bearings (suction casing)
Embodiment
The present invention as the supporting high-pressure service pump of ton reverse osmosis seawater desalting process units (2, flow 220m
3/ h, lift 600m, single-stage lift 100m, six grades of pumps), as shown in Figure 1, it is made up of hydraulic part, axial force automatic balancing device, supporting part, mechanical seal parts and the coupling of water inlet and outlet parts, transformation of energy.
The water inlet and outlet parts comprise: inlet segment 2, water exit end form 19.Main water inlet guiding and the water outlet collecting action of rising.
The hydraulic part of transformation of energy comprises: first stage impeller 3, stator 4, stage casing 8, secondary impeller 9 are formed.First stage impeller 3 and secondary impeller 9 play the transformation of energy effect, make to carry liquid to obtain energy; 4 of stators are collected liquid, convert kinetic energy to the pressure energy, and insert the liquid into next stage impeller or water exit end; Stage casing 8 is played installing and locating and is born the liquid high pressure effect; Consider the cavitation performance that improves pump, first stage impeller 3 adopts different inlet diameter and vane type line with secondary impeller 9.
Axial force automatic balancing device comprises: discharge section sliding bearing 12, balance hub-bearing 13, wear ring 14, Balance disc 15, reflow pipe 18.Balance hub-bearing 13 and discharge section sliding bearing are formed a fixed interval (FI), the equilibrant that the pressure that is maintained fixed in balance hub-sliding bearing 13 front and back falls and fixes.Wear ring 14 and Balance disc 15 are formed variable gap, and pressure falls different and different with Balance disc 15 gaps with wear ring 14 with equilibrant, make rotor keep transient equiliblium.Reflow pipe 18 effect is that the leakage flow with Equilibrator draws and gets back to suction port.The gesture lift at impeller place is a high-pressure section, gets back to the pump intake low-pressure section through fixing gap, variable gap, return pipe, forms the waterpower loop of automatic balancing arrangement.
The supporting part of pump is made up of two sliding bearings 5,6,12,13 that are arranged on pump hydraulic part inside, and pump structure is simplified greatly.Compare with traditional dual-support structure multistage pump, reduced the rolling bearing or the oil-lubricated bearing at outside two ends, line shaft is about 70% of a conventional pump to length, and supporting and striding office's distance is about 45% of conventional pump.
The mechanical seal parts comprise: mechanical seal 17 and bonnet 16.
Connecting piece comprises: rod bolt 11, key 7 and impeller nut 1.
Pump suction side sliding bearing structure, pump can be realized axial suction, and first stage impeller has become cantilever structure by the original axle construction of wearing, and under constructed parameter, it is high by about 4% that cantilever impeller ratio is worn an impeller adiabatic efficiency, the also corresponding raising of the total efficiency of pump.
Support the shortening greatly of span, keeping under the constant situation of axis rigidity, the pump shaft footpath reduces to 70mm by original 85mm.The minimizing of the diameter of axle can reduce the impeller hub diameter, also just can reduce the impeller inlet diameter, and the efficient that helps pump improves.
The minimizing of pump overall axial dimension, the simplification of supporting part makes the weight of pump lighter, reduces more than the 250kg than conventional pump weight.
The optimization of great change of the general structure of pump and hydraulic part makes the efficient of pump reach 80%, has improved 4～7% with the A wire gauge definite value of GB/T13007 " centrifugal pump efficient ", has improved 15 percentage points than the efficient of existing pump.
Be provided with inner sliding bearing because pump is got rid of end, make easily damaged partss such as changing mechanical seal, Balance disc, wear ring, discharge section sliding bearing 12, balance hub-bearing 13 easier, convenient, only need dismounting local and need not integral demounting.
The sliding bearing structure of suction side has reduced suction side mechanical seal, has improved the reliability of pump.
The inner sliding bearing structure that is provided with adopts mother liquor selflubricating and cooling, has solved the rolling bearing cooling of bearings at both ends structure or the external lubricating oil system of two ends sliding bearing.
Claims (1)
1, a kind of efficient high-pressure horizontal multi-stage centrifugal pump is made up of following parts, the water inlet and outlet parts: inlet segment (2), water exit end (19); The hydraulic part of transformation of energy: first stage impeller (3), stator (4), stage casing (8), secondary impeller (9); Axial force automatic balancing device: balance hub bearing (13), wear ring (14), Balance disc (15), reflow pipe (18); Supporting part: discharge section sliding bearing (12), suction casing sliding bearing (5), axle sleeve (6); Mechanical seal parts: bonnet (16), mechanical seal (17); Coupling: impeller nut (1), rod bolt (11), key (7) is characterized in that: the import of multistage centrifugal pump changes axial suction into by traditional radially suction, and the center line of pump intake is concentric with the pump shaft center line, for axial arranged; Supporting part is by discharge section sliding bearing (12), suction casing sliding bearing (5) the substituted metal bearing of the liquid lubrication that is arranged on hydraulic part inside; The secondary impeller (9) of first stage impeller (3) cantilever configuration and freely-supported, the chopped-off head stator has been cancelled an end shaft extension simultaneously as bearing spider; A balance hub bearing (13) and a discharge section sliding bearing (12) are formed a fixed interval (FI), discharge the wear ring (14) and the variable gap of Balance disc (15) combination of section, close discharge section sliding bearing (12) of discharging section plays the effect of the balance hub of balancing axial thrust simultaneously again, constitutes axial force automatic balancing device with Balance disc (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100243982A CN100572821C (en) | 2007-06-15 | 2007-06-15 | A kind of efficient high-pressure horizontal multi-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100243982A CN100572821C (en) | 2007-06-15 | 2007-06-15 | A kind of efficient high-pressure horizontal multi-stage centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101070854A CN101070854A (en) | 2007-11-14 |
| CN100572821C true CN100572821C (en) | 2009-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100243982A Expired - Fee Related CN100572821C (en) | 2007-06-15 | 2007-06-15 | A kind of efficient high-pressure horizontal multi-stage centrifugal pump |
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| CN (1) | CN100572821C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11174877B2 (en) | 2017-02-09 | 2021-11-16 | Natural Ocean Well Co. | Submerged reverse osmosis system |
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| CN101614137B (en) * | 2009-08-06 | 2011-10-19 | 合肥华升泵阀有限责任公司 | Hydraulic turbine installation |
| CN101975168A (en) * | 2010-11-05 | 2011-02-16 | 浙江科尔泵业股份有限公司 | Horizontal axial-suction sectional multistage high-pressure centrifugal pump |
| CN103133352A (en) * | 2011-11-22 | 2013-06-05 | 上海连成（集团）有限公司 | Novel structure of self-suction horizontal-type multi-stage pump |
| CN102734203B (en) * | 2012-07-17 | 2014-08-20 | 浙江佳力科技股份有限公司 | Horizontal multistage pump axial inlet device and connecting structure thereof |
| CN103527507B (en) * | 2013-09-30 | 2016-08-31 | 武汉海王科技有限公司 | A kind of with self-lubricating bearing and the centrifugal pump of Self-centering Action |
| CN103696991B (en) * | 2013-12-11 | 2017-10-27 | 江苏大学 | High-pressure pump rotor axial thrust balancing device |
| CN105650001A (en) * | 2016-02-19 | 2016-06-08 | 长春市坤大石油机械设备有限公司 | Energy-saving centrifugal pump |
| CN107218095B (en) * | 2017-05-16 | 2023-08-08 | 大连深蓝泵业有限公司 | Axial force balance system of LNG hydraulic turbine for liquefied natural gas depressurization working condition |
| CN107178520B (en) * | 2017-08-02 | 2023-06-23 | 汪小艳 | Method for improving operation efficiency of centrifugal water pump and combined elastic sealing device |
| BR102019024355A2 (en) * | 2018-11-21 | 2020-06-02 | Sulzer Management Ag | MULTIPHASE PUMP |
| CN110985396A (en) * | 2019-12-12 | 2020-04-10 | 上海凯泉泵业（集团）有限公司 | Horizontal end-suction multistage centrifugal fire pump with lengthened shaft |
| CN112594191A (en) * | 2020-12-29 | 2021-04-02 | 亿志机械设备(无锡)有限公司 | Small-flow high-lift multistage centrifugal pump |
| CN113623275A (en) * | 2021-08-19 | 2021-11-09 | 鑫磊压缩机股份有限公司 | Gear transmission type inlet guide vane |
-
2007
- 2007-06-15 CN CNB2007100243982A patent/CN100572821C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11174877B2 (en) | 2017-02-09 | 2021-11-16 | Natural Ocean Well Co. | Submerged reverse osmosis system |
| US11326625B2 (en) | 2017-02-09 | 2022-05-10 | Natural Ocean Well Co. | Brine dispersal system |
| US11846305B2 (en) | 2017-02-09 | 2023-12-19 | Natural Ocean Well Co. | Submerged reverse osmosis system |
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| Publication number | Publication date |
|---|---|
| CN101070854A (en) | 2007-11-14 |
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