CN101749250A - First-stage double-absorption section self-balanced multiple-stage centrifugal pump - Google Patents
First-stage double-absorption section self-balanced multiple-stage centrifugal pump Download PDFInfo
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- CN101749250A CN101749250A CN200810229288A CN200810229288A CN101749250A CN 101749250 A CN101749250 A CN 101749250A CN 200810229288 A CN200810229288 A CN 200810229288A CN 200810229288 A CN200810229288 A CN 200810229288A CN 101749250 A CN101749250 A CN 101749250A
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Abstract
The present invention relates to a first-stage double-absorption section self-balanced multiple-stage centrifugal pump comprises a pump shaft, a first-stage double- absorption impeller, an impeller, a driving-end bearing component, a driving-end sealing component, a guide blade, an asorption section, a middle section, an outlet section, transitionary flow passages, a middle sleeve, a middle shaft sleeve, a balanced tube, a non driving side sucking section, a non driving-end sealing component and a non driving-end bearing component, wherein the first-stage double- absorption impeller is in a first-stage absorption section; liquid respectively flowing into an inlet of the first-stage double-absorption impeller from two sides flows into an inlet of a next-stage impeller passing through the two transitionary flow passages which are symmetrical into 180 degrees and are arranged on the outlet section in a space twist shape; impellers at the middle section and the outlet section are in a back to back symmetrical section structure; the middle sleeve at the outlet section is in a two-phase flow spiral groove structure; and a draft tube is additionally arranged between the non driving side sucking section and the outlet section. Assistant support legs are respectively connected with the outlet section and pump base support legs fixedly through bolts. The present invention has the advantages of compact structure, convenient manufacture, arrangement, maintenance and detection, safety, reliability and the like.
Description
Under technical field the present invention relates to a kind of multistage centrifugal pump, particularly a kind ofly be applicable to transfer oil chemical industry and other chemical industry products or contain the small amount of solid particle, have the first-stage double-absorption section self-balanced multiple-stage centrifugal pump of Korrosionsmedium.
Background technique is present, used axially in open, impeller symmetric arrangement, first stage impeller exist as single suction or double suction, mono-hull, scroll casing type multistage centrifugal pump: overall volume is bigger, heavy, processability of product structure is relatively poor, and centering is opened higher, the whole manufacturing difficulty height of sealing, requirement on machining accuracy of face.Sectional type, first stage impeller are single suction, the equidirectional arrangement of other impeller, mono-hull, stator formula multistage centrifugal pump: cause integral installation, adjust complexity owing to increased special balanced controls, when conveying contains solid particle medium, easily balanced controls are destroyed, can't balancing axial thrust, cause the bearing heating, influence is normally used.
Summary of the invention the object of the present invention is to provide a kind of first-stage double-absorption section self-balanced multiple-stage centrifugal pump that can satisfy conveying petrochemical industry high pressure, low cavitation requirement and contain the requirement of small amount of solid granule medium.
For achieving the above object, first-stage double-absorption section self-balanced multiple-stage centrifugal pump provided by the invention comprises pump shaft, the first-stage double-absorption impeller, impeller, the drive end bearing parts, the drive end sealed member, stator, suction casing, the stage casing, outlet section, the transition runner, middle cover, middle axle sleeve, balance tube, the non-drive side suction casing, the anti-drive end sealed member, the non-driven-end bearing parts, wherein the first-stage double-absorption impeller is positioned at the chopped-off head suction casing, and the liquid that enters the inlet of double-entry impeller from both sides respectively enters the next stage impeller eye by the transition runner that is the spatial warping shape that is located at 180 ° of two symmetries on the inducer; The impeller that is positioned at stage casing, outlet section is back-to-back symmetrical sectional type structure, and the middle cover that is positioned at outlet section is the two phase flow helical groove structure, sets up honeycomb duct between non-drive side suction casing and outlet section.
Adopt this structure,, have lower mercury vapour erosion surplus, can satisfy the requirement of the low net positive suction head of user owing to adopt the first-stage double-absorption blade wheel structure, while implementation structure compactness, axial dimension is less.The transition runner adopts the spatial warping structure, at utmost reduces the loss of fluid; The transition runner is designed to symmetry properties can makes the radial force that produces on the impeller reach balance, reduce unit vibration.But adopt the most of axial force of impeller symmetric arrangement balance, residue fraction axial force can hold axle sleeve diameter and gap to adjust elimination by non-driving.Middle cover adopts and is fit to the solid-liquid two-phase flow helical groove structure, when pump turns round, the solids-laden fluid that jack shaft can be overlapped gap location is transported in the spiral chute of middle cover, and be discharged in the outlet section by the perforate of middle cover, avoided solid particle in the accumulation of gap location and to the destruction in gap.
As a further improvement on the present invention, auxiliary legs is affixed with outlet section, pump housing base leg respectively by bolt.Use this structure can by with the frictional force of the affixed generation of bolt, whole outlet section is fixed on the base, can improve the loine pressure that entire pump can be born, increased the rigidity of entire pump again, prevent oscillation phenomenon, guarantee security of operation, steadily.
Characteristics of the present invention are: compact structure, make, installation, maintenance is easy to detect, safe and reliable, can satisfy the job requirement of carrying petrochemical industry high pressure, low cavitation and containing the small amount of solid granule medium.
Description of drawings Fig. 1 is the overall structure schematic representation of first-stage double-absorption section self-balanced multiple-stage centrifugal pump of the present invention.
The axial force balance schematic representation of Fig. 2 for showing as Fig. 1.
The first stage impeller double suction project organization schematic representation of Fig. 3 for showing as Fig. 1.
Fig. 4 is the transition runner structural representation of the inducer that shows as Fig. 1.
Fig. 5 is the middle cover shown as Fig. 1 and the two phase flow helical groove structure schematic representation of orifice sleeve.
The auxiliary legs structural representation of Fig. 6 for showing as Fig. 1.
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing:
As Fig. 1, shown in 2, first-stage double-absorption section self-balanced multiple-stage centrifugal pump of the present invention has pump shaft 20, first-stage double-absorption impeller 4, driving side impeller 7, non-drive side impeller 11, drive end bearing parts 1, drive end sealed member 2, stator 5, suction casing 3, transition runner 21, stage casing 6, outlet section 8, middle cover 9, middle axle sleeve 10, wear and shoulder 12, balance tube 14, non-drive side suction casing 15, orifice sleeve 16, restrictor sleeve 17, anti-drive end sealed member 18, non-driven-end bearing parts 19, wherein the first-stage double-absorption impeller is positioned at suction casing (showing as Fig. 3), and the liquid that enters the inlet of double-entry impeller from both sides respectively enters next stage impeller eye (showing as Fig. 4) by the transition runner that is the spatial warping shape that is installed in 180 ° of two symmetries on the inducer; The impeller that is positioned at stage casing, outlet section is back-to-back symmetrical sectional type structure, and the middle cover that is positioned at outlet section is set up honeycomb duct 13 for being fit to solid, liquid two-phase stream helical groove structure (showing as Fig. 5) between non-drive side suction casing and outlet section; Auxiliary legs 22 by bolt respectively with outlet section, pump housing base leg 23 affixed (showing) as Fig. 6.
In the use,, have lower mercury vapour erosion surplus, can satisfy the requirement of the low net positive suction head of user owing to adopt the first-stage double-absorption blade wheel structure, while implementation structure compactness, axial dimension is less.The transition runner adopts the spatial warping structure, at utmost reduces the loss of fluid; The transition runner is designed to symmetry properties can makes the radial force that produces on the impeller reach balance, reduce unit vibration.But adopt the most of axial force of impeller symmetric arrangement balance, residue fraction axial force can be held axle sleeve diameter and gap adjustment by non-driving.Middle cover adopts the solid-liquid two-phase flow helical groove structure, when pump turns round, the solids-laden fluid that jack shaft can be overlapped gap location is transported in the spiral chute of middle cover, and be discharged in the outlet section by the perforate of middle cover, has avoided solid particle in the accumulation of gap location and to the destruction in gap.By with the frictional force of the affixed generation of bolt, whole outlet section is fixed on the base, can improve the loine pressure that entire pump can be born, increased the rigidity of entire pump again, prevent oscillation phenomenon, guarantee security of operation, steadily.
The present invention has compact conformation, the characteristics such as makes, installation, maintenance is easy to detect, safe and reliable, can satisfy the job requirement of carrying petrochemical industry high pressure, low cavitation and containing a small amount of solid particle medium.
Claims (2)
1. first-stage double-absorption section self-balanced multiple-stage centrifugal pump, comprise pump shaft, the first-stage double-absorption impeller, impeller, the drive end bearing parts, the drive end sealed member, stator, suction casing, the stage casing, outlet section, the transition runner, middle cover, middle axle sleeve, balance tube, the non-drive side suction casing, the anti-drive end sealed member, the non-driven-end bearing parts, it is characterized in that: the first-stage double-absorption impeller is positioned at the chopped-off head suction casing, and the liquid that enters the inlet of double-entry impeller from both sides respectively enters the next stage impeller eye by the transition runner that is the spatial warping shape that is located at 180 ° of two symmetries on the inducer; The impeller that is positioned at stage casing, outlet section is back-to-back symmetrical sectional type structure, and the middle cover that is positioned at outlet section is the two phase flow helical groove structure, sets up honeycomb duct between non-drive side suction casing and outlet section.
2. first-stage double-absorption section self-balanced multiple-stage centrifugal pump according to claim 1 is characterized in that: auxiliary legs is affixed with outlet section, pump housing base leg respectively by bolt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102292884A CN101749250B (en) | 2008-11-30 | 2008-11-30 | First-stage double-absorption section self-balanced multiple-stage centrifugal pump |
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| CN2008102292884A CN101749250B (en) | 2008-11-30 | 2008-11-30 | First-stage double-absorption section self-balanced multiple-stage centrifugal pump |
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| CN101749250A true CN101749250A (en) | 2010-06-23 |
| CN101749250B CN101749250B (en) | 2012-06-20 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892991A (en) * | 2010-07-28 | 2010-11-24 | 上海悦澜泵业制造有限公司 | Horizontal type multi-stage pump without leakage |
| CN101936293A (en) * | 2010-09-13 | 2011-01-05 | 赵景权 | Double-inlet large-flow multistage centrifugal pump |
| CN102606485A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Startup water feed pump for nuclear power station |
| CN102606538A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Middle throttling bush for starting feed pump |
| CN102913452A (en) * | 2012-09-12 | 2013-02-06 | 上海凯泉泵业（集团）有限公司 | First-stage positive-symmetric double-suction segment type multi-stage centrifugal pump |
| CN103225624A (en) * | 2013-04-24 | 2013-07-31 | 嘉利特荏原泵业有限公司 | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump |
| CN105697382A (en) * | 2014-11-28 | 2016-06-22 | 上海凯泉泵业（集团）有限公司 | Radially split double-shell multiple-stage centrifugal pump |
| CN106593886A (en) * | 2016-12-29 | 2017-04-26 | 镇江福泰克流体技术有限公司 | Small-flow high-lift multiple-stage centrifugal pump |
| CN109340120A (en) * | 2018-11-29 | 2019-02-15 | 长沙佳能通用泵业有限公司 | A kind of four volute chambers three outlet self-balancing multi-stage pump |
| CN109630423A (en) * | 2019-02-12 | 2019-04-16 | 孙国伟 | Pumping plant |
| CN110080989A (en) * | 2019-05-20 | 2019-08-02 | 大连深蓝泵业有限公司 | Coaxial-type is arranged symmetrically multistage hydraulic turbine and directly drives pump and its application method |
| CN110360121A (en) * | 2019-06-14 | 2019-10-22 | 沈阳鼓风机集团石化泵有限公司 | A kind of self-balanced multiple-stage centrifugal pump |
| CN110454437A (en) * | 2019-06-24 | 2019-11-15 | 西安航天泵业有限公司 | A kind of multistage middle open formula centrifugal pump first-stage double-absorption transition runner |
| CN114909293A (en) * | 2022-05-20 | 2022-08-16 | 宜昌市西峡泵业有限公司 | Double-suction high-lift balance type odd-level centrifugal pump and operation method |
| CN114909294A (en) * | 2022-05-20 | 2022-08-16 | 宜昌市西峡泵业有限公司 | Double-suction high-lift balanced even-stage centrifugal pump and operation method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2886444B2 (en) * | 1993-10-13 | 1999-04-26 | 株式会社荏原製作所 | All circumferential pump |
| US5494403A (en) * | 1992-04-14 | 1996-02-27 | Ebara Corporation | Full-circumferential flow pump |
| CN1439808A (en) * | 2002-07-10 | 2003-09-03 | 甘肃工业大学 | Multistage sectional centrifugal pump with symmetric impeller arrangement |
| CN2856519Y (en) * | 2005-10-28 | 2007-01-10 | 上海连成（集团）有限公司 | Two-stage, double-suction pump shell |
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2008
- 2008-11-30 CN CN2008102292884A patent/CN101749250B/en active Active
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892991A (en) * | 2010-07-28 | 2010-11-24 | 上海悦澜泵业制造有限公司 | Horizontal type multi-stage pump without leakage |
| CN101936293A (en) * | 2010-09-13 | 2011-01-05 | 赵景权 | Double-inlet large-flow multistage centrifugal pump |
| CN102606485A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Startup water feed pump for nuclear power station |
| CN102606538A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Middle throttling bush for starting feed pump |
| CN102913452A (en) * | 2012-09-12 | 2013-02-06 | 上海凯泉泵业（集团）有限公司 | First-stage positive-symmetric double-suction segment type multi-stage centrifugal pump |
| CN103225624A (en) * | 2013-04-24 | 2013-07-31 | 嘉利特荏原泵业有限公司 | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump |
| CN105697382A (en) * | 2014-11-28 | 2016-06-22 | 上海凯泉泵业（集团）有限公司 | Radially split double-shell multiple-stage centrifugal pump |
| CN106593886A (en) * | 2016-12-29 | 2017-04-26 | 镇江福泰克流体技术有限公司 | Small-flow high-lift multiple-stage centrifugal pump |
| CN109340120A (en) * | 2018-11-29 | 2019-02-15 | 长沙佳能通用泵业有限公司 | A kind of four volute chambers three outlet self-balancing multi-stage pump |
| CN109340120B (en) * | 2018-11-29 | 2019-08-13 | 长沙佳能通用泵业有限公司 | A kind of four volute chambers three outlet self-balancing multi-stage pump |
| CN109630423A (en) * | 2019-02-12 | 2019-04-16 | 孙国伟 | Pumping plant |
| CN110080989A (en) * | 2019-05-20 | 2019-08-02 | 大连深蓝泵业有限公司 | Coaxial-type is arranged symmetrically multistage hydraulic turbine and directly drives pump and its application method |
| CN110360121A (en) * | 2019-06-14 | 2019-10-22 | 沈阳鼓风机集团石化泵有限公司 | A kind of self-balanced multiple-stage centrifugal pump |
| CN110454437A (en) * | 2019-06-24 | 2019-11-15 | 西安航天泵业有限公司 | A kind of multistage middle open formula centrifugal pump first-stage double-absorption transition runner |
| CN114909293A (en) * | 2022-05-20 | 2022-08-16 | 宜昌市西峡泵业有限公司 | Double-suction high-lift balance type odd-level centrifugal pump and operation method |
| CN114909294A (en) * | 2022-05-20 | 2022-08-16 | 宜昌市西峡泵业有限公司 | Double-suction high-lift balanced even-stage centrifugal pump and operation method |
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| Publication number | Publication date |
|---|---|
| CN101749250B (en) | 2012-06-20 |
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