CN202250886U - Dual-drum self-balancing sectional type multi-stage pump - Google Patents
Dual-drum self-balancing sectional type multi-stage pump Download PDFInfo
- Publication number
- CN202250886U CN202250886U CN2011203662392U CN201120366239U CN202250886U CN 202250886 U CN202250886 U CN 202250886U CN 2011203662392 U CN2011203662392 U CN 2011203662392U CN 201120366239 U CN201120366239 U CN 201120366239U CN 202250886 U CN202250886 U CN 202250886U
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- China
- Prior art keywords
- driving end
- drive end
- pump
- stage
- final stage
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/063—Multi-stage pumps of the vertically split casing type
- F04D1/066—Multi-stage pumps of the vertically split casing type the casing consisting of a plurality of annuli bolted together
Abstract
The utility model relates to a dual-drum self-balancing sectional type multi-stage pump, which includes a pump shaft, a pump cover, bearing components, sealing components, a driving end suction box body, a first-stage impeller, driving end secondary impellers, a middle section, a driving end guide vane, an intermediate shaft sleeve, a final stage guide vane, a final stage middle section, a non-driving end guide vane, non-driving end secondary impellers, a non-driving end suction box body and a throttling shaft sleeve, wherein a drum body is additionally arranged among the driving end suction box body, the non-driving end suction box body and the pump cover, so as to form a dual-drum structure; a middle transition section provided with at least one group of flow passages is positioned between the driving end guide vane and the final stage guide vane and sleeved on the outer side at the circumference of the intermediate shaft sleeve; and the at least four driving end secondary impellers and the at least four non-driving end secondary impellers are symmetrically arranged on the two sides of the middle transition section. The dual-drum self-balancing sectional type multi-stage pump has the characteristics of low investment as well as safety, stability and reliability in operation, and can meet the production requirements for transferring methylamine solution of high temperature, high pressure, high possibility of crystallization, strong corrosivity and high saturation vapor pressure.
Description
Technical field the utility model relates to a kind of centrifugal pump, the double shell self balancing sectional type multistage pump of the first ammonium salt solution that particularly a kind ofly be used to carry high temperature, high pressure, be prone to crystallization, corrosivity is strong, saturation vapor pressure is high.
Background technique is present, and the pump structure of in the device of producing urea, carrying high pressure first ammonium salt solution generally to use is following three kinds: reciprocating plunger pump, high speed partial emission pump and middling speed multistage centrifugal pump.Shortcomings such as pulsating pressure is big because reciprocating plunger pump, high speed partial emission pump exist, quick abrasion, maintenance expenses height are replaced by the middling speed multistage centrifugal pump gradually.The middling speed multistage centrifugal pump is a mono-hull self balancing sectional type multistage pump, and 6 grades in impeller about rotating speed 6000r/min, even can reach 7000r/min.NPSH NPSHr has surpassed device net positive suction head NPSHa down at a high speed, and need set up front-mounted pump increases pump intake place pressure, solves the cavitation problem; Because this device rotary speed is high, need relevant devices such as configuration gear-box, front-mounted pump, lubricant oil station, thus exist project investment big, shortcomings such as equipment complicated operation, maintenance cost height.
The purpose of summary of the invention the utility model is to provide that a kind of equipment investment is few, security of operation, double shell self balancing sectional type multistage pump reliably.
For achieving the above object; The utility model double shell self balancing sectional type multistage pump comprises that pump shaft, pump cover, bearing part, sealed member, drive end suck letter body, first stage impeller, the secondary impeller of drive end, stage casing, drive end stator, middle axle sleeve, final stage stator, final stage stage casing, anti-drive end stator, the secondary impeller of anti-drive end, anti-drive end suction letter body, restrictor sleeve; Wherein suck between letter body, anti-drive end suction letter body and pump cover and set up a cylindrical shell, form binocular structure at drive end; At least the middle transition section that is provided with one group of runner be positioned between drive end stator and the final stage stator and be socketed in the middle of the periphery of axle sleeve; The secondary impeller of drive end, the secondary impeller of anti-drive end be for being provided with 4 at least, and arrange in middle transition section bilateral symmetry.
Adopt said structure, realized pump and motor direct connection pattern, not only reduce revolution speed but also reduce mercury vapour erosion surplus, omit the front-mounted pump structure; The work doing efficiency that improves medium through increase impeller quantity satisfies pump discharge place high pressure requirement, so supplementary equipment such as cancellation gear-box, lubricant oil stations; Set up one deck cylindrical shell mechanism simultaneously, improve the sealingly secure property of first ammonium medium in pump chamber, prevent dielectric leakage, the high temperature thermal deformation of parts such as reduction cylindrical shell improves operating reliability, reduces unit vibration; The runner that is provided with in the middle transition section is told 2 pressure chambers with pump chamber in the tube bag, and forming the drive end chamber is 9 grades of lift pressure, and non-actuator chamber is 5 grades of lift pressure, compact structure, the overall volume of minimizing pump-unit.
As the further improvement of the utility model, be provided with two groups of balance runners in the said middle transition section.But this structure both boot media flows to the suction letter body of anti-drive end from drive end, guarantees again to flow to the cylindrical shell outlet from the medium that the final stage stator flows out through the middle transition section, guarantees the medium circulation, and guarantees the elevated temperature heat balance, avoids thermal distortion.It is stressed evenly that two groups of runners of symmetric arrangement help the middle transition section, the thermal distortion under can the balance condition of high temperature, axle sleeve wearing and tearing in the middle of avoiding.
As the further improvement of the utility model, metal wound gasket group is set between changeover portion and final stage stage casing.The expansion of resilient pad group capable of using guarantees that rotor is in extended state, improves the pump shaft rigidity.
Characteristics of the present invention are: have little investment, reliable, steady, safety, the first ammonium salt solution production requirement of can satisfy conveying high temperature, high pressure, be prone to crystallization, corrosivity is strong, saturation vapor pressure is high.
Description of drawings
Fig. 1 is the overall structure schematic representation of the utility model double shell self balancing sectional type multistage pump.
Fig. 2 is the side view of middle transition section as shown in Figure 1.
Fig. 3 is final stage stage casing and a middle transition section schematic representation as shown in Figure 1.
Embodiment is done further explain below in conjunction with accompanying drawing to the utility model:
As shown in Figure 1; Double shell self balancing sectional type multistage pump of the present invention is sucked by pump shaft 1, pump cover 18, bearing part 2,20, sealed member 3,19, drive end that the secondary impeller of the secondary impeller of letter body 4, first stage impeller 5, drive end 6, stage casing 7, drive end stator 8, middle axle sleeve 10, final stage stator 11, final stage stage casing 12, anti-drive end stator 13, anti-drive end 14, anti-drive end suck letter body 15, restrictor sleeve 17 is formed; Wherein suck between letter body, anti-drive end suction letter body and pump cover and set up a cylindrical shell 16, form binocular structure at drive end.Be processed with the periphery of middle transition section 9 axle sleeve between drive end stator and final stage stator and in the middle of being socketed in of two groups of balance runners.The secondary impeller of drive end is equipped with 5, the secondary impeller of anti-drive end and is equipped with 4, and arranges in middle transition section bilateral symmetry, axle sleeve in the middle of being equipped with between adjacent impeller.Metal wound gasket group 21 (showing like Fig. 3) is installed between changeover portion and final stage stage casing.
The runner A of drive end medium through the middle transition section sucks the letter body with the medium anti-drive end that leads in actual use, medium through anti-drive end impeller and stator acting after, through middle transition section runner B with the lead outlet(discharge) flange (showing) of cylindrical shell of medium like Fig. 2.Thereby both guaranteed the medium circulation, guaranteed the elevated temperature heat balance again, avoided thermal distortion.It is stressed evenly that two groups of runners of symmetric arrangement help the middle transition section, the thermal distortion under can the balance condition of high temperature, axle sleeve wearing and tearing in the middle of avoiding.Utilize the expansion of resilient pad group, guarantee that rotor is in extended state, improve the pump shaft rigidity.
It is little to the utlity model has investment, operates steadily, safety, reliable characteristics, can satisfy carry high temperature, high pressure, be prone to crystallization, the production requirement of corrosivity is strong, saturation vapor pressure is high first ammonium salt solution.
Claims (3)
1. double shell self balancing sectional type multistage pump; Comprise that pump shaft, pump cover, bearing part, sealed member, drive end suck letter body, first stage impeller, the secondary impeller of drive end, stage casing, drive end stator, middle axle sleeve, final stage stator, final stage stage casing, anti-drive end stator, the secondary impeller of anti-drive end, anti-drive end suction letter body, restrictor sleeve; It is characterized in that: suck between letter body, anti-drive end suction letter body and pump cover at drive end and set up a cylindrical shell, form binocular structure; At least the middle transition section that is provided with one group of runner be positioned between drive end stator and the final stage stator and be socketed in the middle of the periphery of axle sleeve; The secondary impeller of drive end, the secondary impeller of anti-drive end be for being provided with 4 at least, and arrange in middle transition section bilateral symmetry.
2. double shell self balancing sectional type multistage pump according to claim 1 is characterized in that: be provided with two groups of balance runners in the said middle transition section.
3. double shell self balancing sectional type multistage pump according to claim 1 and 2 is characterized in that: between changeover portion and final stage stage casing, be provided with metal wound gasket group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203662392U CN202250886U (en) | 2011-09-26 | 2011-09-26 | Dual-drum self-balancing sectional type multi-stage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203662392U CN202250886U (en) | 2011-09-26 | 2011-09-26 | Dual-drum self-balancing sectional type multi-stage pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202250886U true CN202250886U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203662392U Expired - Fee Related CN202250886U (en) | 2011-09-26 | 2011-09-26 | Dual-drum self-balancing sectional type multi-stage pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202250886U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511287A (en) * | 2013-10-23 | 2014-01-15 | 大连深蓝泵业有限公司 | Horizontal-type radial subdivision volute-type dual-cylinder pump |
| CN106402036A (en) * | 2016-12-06 | 2017-02-15 | 江苏海天科技有限公司 | Horizontal type double-shell radially-sectioned symmetrically-arranged cylindrical multi-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 |
| CN109322831A (en) * | 2018-11-29 | 2019-02-12 | 长沙佳能通用泵业有限公司 | A kind of double outlet self-balancing multi-stage pumps of four volute chambers |
| CN109404292A (en) * | 2018-12-09 | 2019-03-01 | 大连深蓝泵业有限公司 | Large chemical fertilizer urea plant high-pressure pump |
| CN111927784A (en) * | 2020-07-31 | 2020-11-13 | 西安航天动力研究所 | Two-stage centrifugal pump structure |
| IT201900023160A1 (en) * | 2019-12-06 | 2021-06-06 | Eurotecnica Melamine Ag | Centrifugal pump for processing molten urea and relative plant |
| US20220018362A1 (en) * | 2020-07-14 | 2022-01-20 | Flowserve Management Company | Compensation assemblies for fluid handling devices and related devices, systems, and methods |
| CN114962272A (en) * | 2022-06-09 | 2022-08-30 | 烟台龙港泵业股份有限公司 | High-pressure water injection pump with adjustable marine floating platform reposition of redundant personnel |
-
2011
- 2011-09-26 CN CN2011203662392U patent/CN202250886U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511287A (en) * | 2013-10-23 | 2014-01-15 | 大连深蓝泵业有限公司 | Horizontal-type radial subdivision volute-type dual-cylinder pump |
| CN106402036A (en) * | 2016-12-06 | 2017-02-15 | 江苏海天科技有限公司 | Horizontal type double-shell radially-sectioned symmetrically-arranged cylindrical multi-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 |
| CN109322831A (en) * | 2018-11-29 | 2019-02-12 | 长沙佳能通用泵业有限公司 | A kind of double outlet self-balancing multi-stage pumps of four volute chambers |
| CN109322831B (en) * | 2018-11-29 | 2019-08-13 | 长沙佳能通用泵业有限公司 | A kind of double outlet self-balancing multi-stage pumps of four volute chambers |
| CN109404292A (en) * | 2018-12-09 | 2019-03-01 | 大连深蓝泵业有限公司 | Large chemical fertilizer urea plant high-pressure pump |
| IT201900023160A1 (en) * | 2019-12-06 | 2021-06-06 | Eurotecnica Melamine Ag | Centrifugal pump for processing molten urea and relative plant |
| US20220018362A1 (en) * | 2020-07-14 | 2022-01-20 | Flowserve Management Company | Compensation assemblies for fluid handling devices and related devices, systems, and methods |
| US11788532B2 (en) * | 2020-07-14 | 2023-10-17 | Flowserve Pte. Ltd. | Compensation assemblies for fluid handling devices and related devices, systems, and methods |
| US20240026885A1 (en) * | 2020-07-14 | 2024-01-25 | Flowserve Pte. Ltd. | Compensation assemblies for fluid handling devices and related devices, systems, and methods |
| CN111927784A (en) * | 2020-07-31 | 2020-11-13 | 西安航天动力研究所 | Two-stage centrifugal pump structure |
| CN114962272A (en) * | 2022-06-09 | 2022-08-30 | 烟台龙港泵业股份有限公司 | High-pressure water injection pump with adjustable marine floating platform reposition of redundant personnel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Sui Zhihe Document name: Review of business letter |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20180926 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |