CN104121203A - Single-section structure of sectional-type multi-stage pump for sewage - Google Patents
Single-section structure of sectional-type multi-stage pump for sewage Download PDFInfo
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- CN104121203A CN104121203A CN201410333188.1A CN201410333188A CN104121203A CN 104121203 A CN104121203 A CN 104121203A CN 201410333188 A CN201410333188 A CN 201410333188A CN 104121203 A CN104121203 A CN 104121203A
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Abstract
The invention relates to a sectional-type multi-stage centrifugal pump, in particular to a single-section structure of a sectional-type multi-stage pump for sewage. The single-section structure of the sectional-type multi-stage pump for the sewage is composed of impellers, impeller back vanes, impeller inlet seal rings, spatial guide vanes, guide vane flow guide pads, bearings, shaft sleeves, middle sections, spindles and flat keys. The single-section structure is characterized in that the spindles, the impellers, the shaft sleeves and the flat keys form the rotor part of the single-section structure of the sectional-type multi-stage centrifugal pump for the sewage; the middle sections, the spatial guide vanes, the guide vane flow guide pads, the impeller inlet seal rings and the bearings form the stator part of the single-section structure of the sectional-type multi-stage centrifugal pump for the sewage. The single-section structure has the axial force balancing function of the pump and the independent supporting function; moreover, the spatial guide vanes are adopted, the radial size of the single-section structure is smaller than that of a structure with radial-type guide vanes adopted by more than 5%, liquid flowing out from the impellers is collected separately through single flow channels and is independently conveyed to next-stage impeller inlets respectively and the fluid hydraulic loss is less than that of an existing structure by about three percent.
Description
Technical field
The present invention relates to a kind of multistage segmental type pump, relate in particular to the single segment structure of multistage segmental type pump for a kind of sewage.
Background technique
Multistage segmental type pump is formed by a plurality of single hop centrifugal pump tandem compounds.The single segment structure design of multistage segmental type pump mainly needs to consider: 1, guarantee as far as possible to collect, pressurization and carry loss reduction in the process of liquid, and make uniform liquid enter into next stage single segment structure; 2, reduce as far as possible external diameter and the axial dimension in impeller, stator and stage casing, to reduce spatial volume and the materials consumption of pump, reduce the manufacture cost of product, improve the competitiveness of product in market.The single segment structure of existing multistage segmental type pump according to fed sheet of a media situation different with whether self possess axial force balance function and be divided into two kinds of single port ring blade wheel structure and twoport ring blade wheel structures.Wherein:
One, single port ring blade wheel structure.When fed sheet of a media is clear water, multistage segmental type pump generally adopts the axial force of balancing drum or Balance disc ballast pump, and the axial equilibrium of forces of pump is not considered in the single segment structure design of multistage segmental type pump.The part of this single segment structure comprises: 1, single port ring impeller; 2, impeller inlet seal ring; 3, radial stator or flow channel type guide blade; 4, guide blade sleeve; 5, stage casing.
The advantage of single port ring blade wheel structure is: 1, design is shaped, and parts Standardization, generalization degree are high, use the most extensive; 2, casting process is ripe, and form compare is easy; 3, single port ring blade wheel structure does not have the return loss at back shroud of impeller seal ring and impeller balance hole place, and the volumetric loss of pump is less than twoport ring blade wheel structure.
The defect of single port ring blade wheel structure is: adopt the axial force of balancing drum or Balance disc ballast pump, when balancing drum or Balance disc break down, or when the water return pipeline of balancing drum or Balance disc back cavity is blocked, can destroy the safe operation of pump.Therefore, can not be for sewage and easy fouling medium.
Two, twoport ring blade wheel structure.When fed sheet of a media is sewage or easy fouling medium, multistage segmental type pump should not adopt the axial force of balancing drum or Balance disc ballast pump, the existing twoport ring blade wheel structure that generally adopts of single segment structure design of multistage segmental type pump.The part of this single segment structure comprises: 1, twoport ring impeller; 2, impeller inlet seal ring; 3, back shroud of impeller seal ring; 4, radial stator or flow channel type guide blade; 5, guide blade sleeve; 6, stage casing.
The advantage of twoport ring blade wheel structure is: 1, adopt twoport ring blade wheel structure, by the effect of back shroud of impeller seal ring and impeller balance hole, this sewage has possessed the axial force balance function of pump with the single segment structure of multistage segmental type pump itself, do not need to arrange separately the axial thrust balancing devices of pump again; 2, impeller balance hole number is many, duct is short, is not prone to fouling and blocked, therefore, not only can, for delivery of clear water class medium, also can be used in and carry general sewage and easy fouling medium.
The defect of twoport ring blade wheel structure is: 1, after back shroud of impeller seal ring and impeller balance hole, arranging of cavity space need take certain axial dimension, can increase the axial dimension in impeller, stator and the stage casing of pump, increase spatial volume and the materials consumption of pump, improve the manufacture cost of product, reduce the competitiveness of product in market; 2, back shroud of impeller seal ring is arranged on stator, the stack of multiple shape and positioning tolerance, likely cause impeller after choma when water pump operation, occur rubbing with back shroud of impeller seal ring, both strengthened the mechanical loss of pump, strengthened again the volume loss of pump; 3, the volumetric loss of pump is larger than single port ring blade wheel structure, and efficiency is lower than single port ring impeller.
Adopt radial guide vane structure simple, footpath, axial dimension are less than flow channel type guide blade, but the bend portion size change in shape of stator is large, producing irrgular movement here, collide and conflux, the liquid stream flowing out from single stator enters return guide vane, therefore fluid hydraulic loss is larger than flow channel type guide blade, is unfavorable for improving the efficiency of pump; The import that adopts flow channel type guide blade to enter next stage impeller from impeller liquid stream out by spiral collection section, diffuser, bend section and centripetal Drainage Section, liquid flow movement rule, not collision with conflux, therefore fluid hydraulic loss is less than radial stator, be conducive to improve the efficiency of pump, but foundry goods form compare is difficult, stator external diameter and axial dimension are larger 10%～15% than radial stator, have increased spatial volume and the materials consumption of pump, have improved the manufacture cost of pump.
Summary of the invention
The object of the invention is to provide the single segment structure of a kind of sewage with multistage segmental type pump, this single segment structure itself has possessed the axial force balance function of pump; Single segment structure separate support function; And adopt unique spatial guide blade, do not need to increase the axial dimension of pump, radial dimension is less more than 5% than adopting radial guide vane structure, from impeller liquid stream out, by single runner separate collection, be also independently transported to separately next stage impeller inlet, fluid hydraulic loss is than little 3% left and right of existing structure.
This sewage of the present invention is comprised of impeller, back blade, impeller inlet seal ring, spatial guide blade, stator drainage pad, bearing, axle sleeve, stage casing, main shaft and flat key with the single segment structure of multistage segmental type pump, it is characterized in that: described main shaft, impeller, axle sleeve, flat key form the rotor portion of the single segment structure of multistage segmental type pump for a kind of sewage; Described stage casing, spatial guide blade, stator drainage pad, impeller inlet seal ring, bearing form the stationary part of the single segment structure of multistage segmental type pump for a kind of sewage; The described impeller back side is provided with back blade; Described spatial guide blade with in the intersegmental stator drainage pad that is provided with; On described stage casing, be mounted with intermediate clapboard and return guide vane; The outer of the intermediate clapboard on described stage casing is provided with a circular trough.
Wherein, described spatial guide blade is comprised of stator bottom diversion seat, spatial warping stator, stator inner ring surface guide ring, it is characterized in that: on described stator bottom diversion seat, evenly interval is provided with 2 above spatial warping stators; Described spatial warping stator inner ring surface middle part is provided with stator inner ring surface guide ring; Stator bottom, the bottom trace edge diversion seat arcuate surface on described spatial warping vane inlet limit forms the belt curve of spiral, 180 ° of distortions; The top trace edge stator inner ring surface guide ring inner ring surface on described spatial warping vane inlet limit forms the belt curve of plane, 180 ° of distortions.
Wherein, the back blade of described impeller, in the annular recess that the stator inner ring surface guide ring inner ring surface of the outer circular trough of the intermediate clapboard on the stage casing described in being placed in and described spatial guide blade forms.
Working principle of the present invention is:
1, a kind of sewage being comprised of main shaft, impeller, axle sleeve, flat key rotates with main shaft and works with the rotor portion of the single segment structure of multistage segmental type pump under the effect of external power; Through impeller inlet, suck and the liquid stream that pressurizeed by impeller completes radially under the effect of stator bottom diversion seat, spatial warping stator, stator inner ring surface guide ring, stator drainage pad, axial, centripetal 180 ° of gradual change type distortions, along single helical flow path, divide open shop, collection, and be independently transported to separately the import of the return guide vane on water pump stage casing; The impeller inlet that pre-supination flows into next stage single segment structure is uniformly separated, guided, controls to the return guide vane that liquid is flowed through on water pump stage casing.
2, the impeller back side is provided with back blade, back blade when work be along moving in the annular recess of the stator inner ring surface guide ring inner ring surface composition of the circular trough on intermediate clapboard outer, stage casing and spatial guide blade, utilizes the axial force on the effect balance impeller front and rear cover plate of centrifugal force.
3, the rotor portion of single segment structure includes the axle sleeve being arranged on main shaft; The stationary part of single segment structure includes the bearing being arranged on the intermediate clapboard of stage casing; When being arranged on the axle sleeve on main shaft and being arranged on the bearing operation on the intermediate clapboard of stage casing, possessed separate support function.
Product of the present invention is compared with prior art products below effect major embodiment is:
1, product of the present invention adopts spatial guide blade, and single runner collection section and diffuser all complete in helically twisted runner, and runner is extended in space; The import of helically twisted runner and the outlet of helically twisted runner are twisted 180 °, and whole process is regular, gradual completing, and bend section is cancelled.Therefore, compare with radial guide vane structure, stator radial dimension can reduce more than 5%; Compare with flow channel type guide blade structure, stator radial dimension can reduce more than 10%, and stator axial dimension can reduce more than 5%.
2, the import of the helically twisted runner of product space stator of the present invention and the outlet of helically twisted runner are twisted 180 °, whole process is regular, gradual completing, in whole runner, there is no change in shape and significant flex point sharply, do not collide and conflux, bend section is cancelled.Therefore, compare little 3% left and right of fluid hydraulic loss with radial guide vane structure; Compare little 1% left and right of fluid hydraulic loss with flow channel type guide blade structure.
3, the import of the helically twisted runner of product space stator of the present invention and the outlet of helically twisted runner are twisted 180., whole process is regular, gradual completing, and there is no change in shape and significant flex point sharply in whole runner; Add upper runner completely open, easily guarantee gate vane channel castability, cleaning gate vane channel surface casting defect is with sticky husky; Adding runner can anticorrosion with painting, wear-resistant protection coating; Therefore, this structure stator is specially adapted to carry sewage, runner fouling and plugging fault can not occur.
4, the product impeller of the present invention back side is provided with back blade, in back blade when work, is along moving in the annular recess of the stator inner ring surface guide ring inner ring surface composition of the circular trough on intermediate clapboard outer, stage casing and spatial guide blade, utilize the axial force on the effect balance impeller front and rear cover plate of centrifugal force, compare with twoport ring blade wheel structure to be not only more suitable for and carry sewage and easy fouling medium, and efficiency 1% left and right that can reduce volumetric loss, improve pump.
When 5, product of the present invention is arranged on the axle sleeve on main shaft and is arranged on the bearing operation on the intermediate clapboard of stage casing, possessed separate support function.Every one-level impeller has guide bearing to support, and rotor operation is more stable; Guide bearing two ends pressure reduction is single-stage impeller lift, lubricated more reliable.
6, product of the present invention is different from conventional construction product, single segment structure possesses separate support function, need to bearing be set the inducer before first stage impeller, therefore the import before first stage impeller can not arrange bar axle, can improve the water inlet state of first stage impeller, do not need to strengthen the water inlet area of first stage impeller, can guarantee the versatility of head, secondary Impeller Parts, and can improve pump efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the single segment structure of multistage segmental type pump for a kind of sewage of the present invention.
Fig. 2 is the structural representation of the spatial guide blade 4 described in Fig. 1.
Symbol description in figure: 1 impeller, 2 back blades, 3 impeller inlet seal rings, 4 spatial guide blades, 5 stator drainage pads, 6 bearings, 7 axle sleeves, 8 stage casings, 9 main shafts, 10 flat keys, 11 intermediate clapboards, 12 return guide vanes, 13 circular troughs, 14 stator bottom diversion seats, 15 spatial warping stators, 16 stator inner ring surface guide rings, the bottom on 17 spatial warping vane inlet limits, 18 stator bottom diversion seat arcuate surface, the top on 19 spatial warping vane inlet limits, 20 stator inner ring surface guide ring inner ring surfaces, 21 spiral collection sections, 22 spiral diffusers.
Embodiment
Below in conjunction with accompanying drawing, a kind of sewage of the present invention is described by the embodiment of the single segment structure of multistage segmental type pump:
In the present embodiment, this sewage of the present invention is comprised of with flat key 10 impeller 1, back blade 2, impeller inlet seal ring 3, spatial guide blade 4, stator drainage pad 5, bearing 6, axle sleeve 7, stage casing 8, main shaft 9 with the single segment structure of multistage segmental type pump, it is characterized in that: described main shaft 9, impeller 1, axle sleeve 7, flat key 10 form the rotor portion of the single segment structure of multistage segmental type pump for a kind of sewage; Described stage casing 8, spatial guide blade 4, stator drainage pad 5, impeller inlet seal ring 3, bearing 6 form the stationary part of the single segment structure of multistage segmental type pump for a kind of sewage; Described impeller 1 back side is provided with back blade 2; 8, described spatial guide blade 4 and stage casing are provided with stator drainage pad 5; On described stage casing, be mounted with intermediate clapboard 11 and return guide vane 12; The outer of the intermediate clapboard 11 on described stage casing is provided with a circular trough 13.
Wherein, described spatial guide blade 4 is comprised of stator bottom diversion seat 14, spatial warping stator 15, stator inner ring surface guide ring 16, it is characterized in that: on described stator bottom diversion seat 14, evenly interval is provided with 7 spatial warping stators 15; Described spatial warping stator 15 inner ring surface middle parts are provided with stator inner ring surface guide ring 16; Bottom 17 stator bottom, the track edge diversion seat arcuate surface 18 on described spatial warping vane inlet limit form the belt curve of spiral, 180 ° of distortions; The top 19 track edge stator inner ring surface guide ring inner ring surfaces 20 on described spatial warping vane inlet limit form the belt curve of plane, 180 ° of distortions.
Wherein, the single runner of described spatial guide blade is regular helically twisted runner, comprising: spiral collection section 21 and spiral diffuser 22.
Wherein, the back blade 2 of described impeller, in the annular recess that the stator inner ring surface guide ring inner ring surface 20 of the outer circular trough 13 of the intermediate clapboard 11 on the stage casing 8 described in being placed in and described spatial guide blade 4 forms.
Claims (3)
1. the single segment structure of multistage segmental type pump for a sewage, by impeller, back blade, impeller inlet seal ring, spatial guide blade, stator drainage pad, bearing, axle sleeve, stage casing, main shaft and flat key, formed, it is characterized in that: described main shaft, impeller, axle sleeve, flat key form the rotor portion of the single segment structure of multistage segmental type pump for a kind of sewage; Described stage casing, spatial guide blade, stator drainage pad, impeller inlet seal ring, bearing form the stationary part of the single segment structure of multistage segmental type pump for a kind of sewage; The described impeller back side is provided with back blade; Described spatial guide blade with in the intersegmental stator drainage pad that is provided with; On described stage casing, be mounted with intermediate clapboard and return guide vane; The outer of the intermediate clapboard on described stage casing is provided with a circular trough.
2. the single segment structure with multistage segmental type pump by a kind of sewage claimed in claim 1, is characterized in that: described spatial guide blade is comprised of stator bottom diversion seat, spatial warping stator, stator inner ring surface guide ring; On described stator bottom diversion seat, evenly interval is provided with 2 above spatial warping stators; Described spatial warping stator inner ring surface middle part is provided with stator inner ring surface guide ring; Stator bottom, the bottom trace edge diversion seat arcuate surface on described spatial warping vane inlet limit forms the belt curve of spiral, 180 ° of distortions; The top trace edge stator inner ring surface guide ring inner ring surface on described spatial warping vane inlet limit forms the belt curve of plane, 180 ° of distortions.
3. by a kind of sewage claimed in claim 1, use the single segment structure of multistage segmental type pump, it is characterized in that: the back blade of described impeller, in the annular recess that the stator inner ring surface guide ring inner ring surface of the outer circular trough of the intermediate clapboard on the stage casing described in being placed in and described spatial guide blade forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333188.1A CN104121203A (en) | 2014-07-14 | 2014-07-14 | Single-section structure of sectional-type multi-stage pump for sewage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333188.1A CN104121203A (en) | 2014-07-14 | 2014-07-14 | Single-section structure of sectional-type multi-stage pump for sewage |
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| CN104121203A true CN104121203A (en) | 2014-10-29 |
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|---|---|---|---|
| CN201410333188.1A Pending CN104121203A (en) | 2014-07-14 | 2014-07-14 | Single-section structure of sectional-type multi-stage pump for sewage |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912850A (en) * | 2015-05-21 | 2015-09-16 | 合肥通用机械研究院 | Radial guide vane structure with streamline structure |
| CN106337834A (en) * | 2016-09-29 | 2017-01-18 | 周宁县善长祥农业机械研发有限公司 | Multi-stage impeller device and using method thereof |
| CN106939904A (en) * | 2017-04-01 | 2017-07-11 | 江苏大学 | A kind of Combined guide impeller structure |
| CN108644120A (en) * | 2018-06-25 | 2018-10-12 | 杭州新亚低温科技有限公司 | A kind of self-balanced multiple-stage cryogenic pump |
| CN109779923A (en) * | 2019-01-21 | 2019-05-21 | 临城清泉水泵制造有限公司 | A kind of submersible pump with high lift performance |
| CN110291295A (en) * | 2017-02-10 | 2019-09-27 | 西门子股份公司 | Return stage of a multistage compressor or expander with twisted guide vanes |
| CN114810609A (en) * | 2022-04-19 | 2022-07-29 | 温岭市高深泵业科技有限公司 | Multi-stage vane pump with special flow guide structure and multi-stage partial flow pump |
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| CN101117966A (en) * | 2006-08-01 | 2008-02-06 | 上海连成（集团）有限公司 | Novel contraprop of water pump |
| CN202273867U (en) * | 2011-09-02 | 2012-06-13 | 合肥华升泵阀有限责任公司 | Multi-stage partial emission pump |
| CN202348683U (en) * | 2011-12-12 | 2012-07-25 | 四川新达泵业有限责任公司 | Vertical multi-stage pump |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101117966A (en) * | 2006-08-01 | 2008-02-06 | 上海连成（集团）有限公司 | Novel contraprop of water pump |
| CN202273867U (en) * | 2011-09-02 | 2012-06-13 | 合肥华升泵阀有限责任公司 | Multi-stage partial emission pump |
| CN202348683U (en) * | 2011-12-12 | 2012-07-25 | 四川新达泵业有限责任公司 | Vertical multi-stage pump |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912850A (en) * | 2015-05-21 | 2015-09-16 | 合肥通用机械研究院 | Radial guide vane structure with streamline structure |
| CN104912850B (en) * | 2015-05-21 | 2017-03-01 | 合肥通用机械研究院 | Radial guide vane structure with streamline structure |
| CN106337834A (en) * | 2016-09-29 | 2017-01-18 | 周宁县善长祥农业机械研发有限公司 | Multi-stage impeller device and using method thereof |
| CN106337834B (en) * | 2016-09-29 | 2018-06-15 | 周宁县善长祥农业机械研发有限公司 | Multi-stage impeller device and its application method |
| CN110291295A (en) * | 2017-02-10 | 2019-09-27 | 西门子股份公司 | Return stage of a multistage compressor or expander with twisted guide vanes |
| US11073162B2 (en) | 2017-02-10 | 2021-07-27 | Siemens Energy Global GmbH & Co. KG | Return stage of a multi-staged compressor or expander with twisted guide vanes |
| CN106939904A (en) * | 2017-04-01 | 2017-07-11 | 江苏大学 | A kind of Combined guide impeller structure |
| CN108644120A (en) * | 2018-06-25 | 2018-10-12 | 杭州新亚低温科技有限公司 | A kind of self-balanced multiple-stage cryogenic pump |
| CN108644120B (en) * | 2018-06-25 | 2024-01-05 | 杭州新亚低温科技有限公司 | Self-balancing multistage cryogenic pump |
| CN109779923A (en) * | 2019-01-21 | 2019-05-21 | 临城清泉水泵制造有限公司 | A kind of submersible pump with high lift performance |
| CN114810609A (en) * | 2022-04-19 | 2022-07-29 | 温岭市高深泵业科技有限公司 | Multi-stage vane pump with special flow guide structure and multi-stage partial flow pump |
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Application publication date: 20141029 |