CN204082677U - A kind of single segment structure of multistage sectional centrifugal pump - Google Patents
A kind of single segment structure of multistage sectional centrifugal pump Download PDFInfo
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- CN204082677U CN204082677U CN201420508224.9U CN201420508224U CN204082677U CN 204082677 U CN204082677 U CN 204082677U CN 201420508224 U CN201420508224 U CN 201420508224U CN 204082677 U CN204082677 U CN 204082677U
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- impeller
- single segment
- segment structure
- centrifugal pump
- multistage sectional
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Abstract
The utility model relates to a kind of multistage sectional centrifugal pump, particularly relates to a kind of single segment structure of multistage sectional centrifugal pump.The single segment structure of this multistage sectional centrifugal pump is made up of impeller, back blade, impeller inlet seal ring, spatial guide blade, stator drainage pad, bearing, axle sleeve, stage casing, main shaft and flat key, it is characterized in that: described main shaft, impeller, axle sleeve, flat key form a kind of rotor portion of single segment structure of multistage sectional centrifugal pump; Described stage casing, spatial guide blade, stator drainage pad, impeller inlet seal ring, bearing form a kind of stationary part of single segment structure of multistage sectional centrifugal pump.This single segment structure possesses the axial force balance function of pump; Single segment structure separate support function; And employing spatial guide blade, radial dimension is less by more than 5% than adopting radial guide vane structure, and be independently transported to next stage impeller inlet from impeller liquid stream out separately by single runner separate collection, flow hydraulic loses less than existing structure by about 3%.
Description
Technical field
The utility model relates to a kind of multistage sectional centrifugal pump, particularly relates to a kind of single segment structure of multistage sectional centrifugal pump.
Background technique
Multistage sectional centrifugal pump is formed by multiple single hop centrifugal pump tandem compound.The single segment structure design of multistage sectional centrifugal pump mainly needs to consider: 1, ensure as far as possible to collect, loss reduction in the process of pressurization and conveying liquid, and make uniform liquid enter into next stage single segment structure; 2, reduce impeller, the external diameter in stator and stage casing and axial dimension as far as possible, 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 sectional centrifugal pump according to fed sheet of a media situation different with whether self possess axial force balance function and be divided into single port ring blade wheel structure and twoport ring blade wheel structure two kinds.Wherein:
One, single port ring blade wheel structure.When fed sheet of a media is clear water, multistage sectional centrifugal 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 sectional centrifugal 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: the axial force adopting 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 used for carrying sewage and easy fouling medium.
Two, twoport ring blade wheel structure.When fed sheet of a media be sewage or easily fouling medium time, multistage sectional centrifugal pump should not adopt the axial force of balancing drum or Balance disc ballast pump, and the single segment structure design of multistage sectional centrifugal pump is existing generally adopts twoport ring blade wheel structure.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, the single segment structure of this multistage sectional centrifugal pump itself has possessed the axial force balance function of pump, does not need the axial thrust balancing devices arranging separately pump again; 2, impeller balance hole number is many, duct is short, not easily occurs therefore, being used for fouling and blocked carrying clear water class medium, also can be used in conveying 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, the axial dimension in the impeller of pump, stator and stage casing can be increased, 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, and multiple shape superposes with positioning tolerance, and after likely causing impeller, rubbing appears when water pump operation in choma and back shroud of impeller seal ring, has both increased the mechanical loss of pump, has increased 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 change of the racetrack portion size shape of stator greatly, the liquid stream flowed out from single stator produces irrgular movement here, collide with conflux after enter return guide vane, therefore flow hydraulic loss is larger than flow channel type guide blade, is unfavorable for the efficiency improving pump; Flow channel type guide blade is adopted to flow through from impeller liquid out the import that spiral collection section, diffuser, bend section and centripetal Drainage Section enter next stage impeller, liquid flow movement rule, not collision with conflux, therefore flow hydraulic loss is less than radial stator, be conducive to the efficiency improving pump, but foundry goods form compare is difficult, stator external diameter and axial dimension larger than radial stator 10% ~ 15%, add spatial volume and the materials consumption of pump, improve the manufacture cost of pump.
Summary of the invention
The purpose of this utility model is the single segment structure that will provide a kind of multistage sectional centrifugal pump, and this single segment structure itself has possessed the axial force balance function of pump; Single segment structure separate support function; And employing spatial guide blade, do not need the axial dimension increasing pump, radial dimension is less by more than 5% than adopting radial guide vane structure, and be independently transported to next stage impeller inlet from impeller liquid stream out separately by single runner separate collection, flow hydraulic loses less than existing structure by about 3%.
The single segment structure of this multistage sectional centrifugal pump of the present utility model is made up of impeller, back blade, impeller inlet seal ring, spatial guide blade, stator drainage pad, bearing, axle sleeve, stage casing, main shaft and flat key, it is characterized in that: described main shaft, impeller, axle sleeve, flat key form a kind of rotor portion of single segment structure of multistage sectional centrifugal pump; Described stage casing, spatial guide blade, stator drainage pad, impeller inlet seal ring, bearing form a kind of stationary part of single segment structure of multistage sectional centrifugal pump; Described wheel backface is provided with back blade; Described spatial guide blade with in intersegmental stator drainage pad is installed; Described stage casing is mounted with intermediate clapboard and return guide vane; The outer of the intermediate clapboard on described stage casing is provided with a circular trough.
Working principle of the present utility model is:
The rotor portion of the single segment structure of a kind of multistage sectional centrifugal pump 1, be made up of main shaft, impeller, axle sleeve, flat key rotates with main shaft and works under the effect of extrinsic power; Through impeller inlet suck and the liquid stream pressurizeed by impeller completes radial direction, axis, centripetal 180 ° of gradual change type distortions under the effect of diversion seat, spatial warping stator, stator inner ring surface guide ring, stator drainage pad, divide open shop, collection along single helical flow path, and be independently transported to the import of the return guide vane on water pump stage casing separately; The liquid return guide vane flowed through on water pump stage casing is separated, guides, is controlled the impeller inlet that pre-supination flows into next stage single segment structure uniformly.
2, wheel backface is provided with back blade, run in the annular recess formed along the stator inner ring surface guide ring inner ring surface of the circular trough on intermediate clapboard outer, stage casing and spatial guide blade during back blade work, utilize the effect of centrifugal force to balance axial force on impeller front and rear cover plate.
3, the rotor portion of single segment structure includes the axle sleeve be arranged on main shaft; The stationary part of single segment structure includes the bearing be arranged on the intermediate clapboard of stage casing; Separate support function has been possessed when the axle sleeve be arranged on main shaft runs with the bearing be arranged on the intermediate clapboard of stage casing.
The utility model product effect major embodiment compared with prior art products is following:
1, the utility model product 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, compared with radial guide vane structure, stator radial dimension can reduce more than 5%; Compared 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 the utility model product space stator and the outlet of helically twisted runner are twisted 180 °, whole process is regular, gradual completing, do not have change in shape sharply and significant flex point in whole runner, do not collide and conflux, bend section is cancelled.Therefore, compared with radial guide vane structure, flow hydraulic loss is little by about 3%; Compared with flow channel type guide blade structure, flow hydraulic loss is little by about 1%.
3, the import of the helically twisted runner of the utility model product space stator and the outlet of helically twisted runner are twisted 180 °, and whole process is regular, gradual completing, and does not have change in shape sharply and significant flex point in whole runner; Add upper runner opening completely, easily ensure 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, and runner fouling and plugging fault can not occur.
4, the utility model product wheel backface is provided with back blade, run in the annular recess formed along the stator inner ring surface guide ring inner ring surface of the circular trough on intermediate clapboard outer, stage casing and spatial guide blade during back blade work, not only be more suitable for compared with twoport ring blade wheel structure and carry sewage and easy fouling medium, and the efficiency about 1% of volumetric loss, raising pump can be reduced.
5, separate support function has been possessed when the utility model product axle sleeve be arranged on main shaft runs with the bearing be arranged on the intermediate clapboard of stage casing.Every one stage impeller has guide bearing to support, and rotor operation is more stable; Guide bearing two ends pressure reduction is single-stage impeller lift, lubricates more reliable.
6, the utility model product is different from conventional construction product, single segment structure possesses separate support function, do not need the inducer before first stage impeller that bearing is set, therefore the import before first stage impeller can not arrange bar axle, the water inlet state of first stage impeller can be improved, do not need the water inlet area strengthening first stage impeller, the versatility of head, secondary impeller part can be ensured, and can pump efficiency be improved.
Accompanying drawing explanation
Accompanying drawing is the structural representation of the single segment structure of a kind of multistage sectional centrifugal pump described in the utility model.
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.
Embodiment
Below in conjunction with accompanying drawing, the embodiment to the single segment structure of a kind of multistage sectional centrifugal pump described in the utility model is described:
In the present embodiment, the single segment structure of this multistage sectional centrifugal pump of the present utility model is made up 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, it is characterized in that: described main shaft 9, impeller 1, axle sleeve 7, flat key 10 form a kind of rotor portion of single segment structure of multistage sectional centrifugal pump; Described stage casing 8, spatial guide blade 4, stator drainage pad 5, impeller inlet seal ring 3, bearing 6 form a kind of stationary part of single segment structure of multistage sectional centrifugal pump; Described impeller 1 back side is provided with back blade 2; Between described spatial guide blade 4 and stage casing 8, stator drainage pad 5 is installed; Described stage casing is 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.
Claims (1)
1. the single segment structure of a multistage sectional centrifugal pump is made up of impeller, back blade, impeller inlet seal ring, spatial guide blade, stator drainage pad, bearing, axle sleeve, stage casing, main shaft and flat key, it is characterized in that: described main shaft, impeller, axle sleeve, flat key form a kind of rotor portion of single segment structure of multistage sectional centrifugal pump; Described stage casing, spatial guide blade, stator drainage pad, impeller inlet seal ring, bearing form a kind of stationary part of single segment structure of multistage sectional centrifugal pump; Described wheel backface is provided with back blade; Described spatial guide blade with in intersegmental stator drainage pad is installed; Described stage casing is mounted with intermediate clapboard and return guide vane; The outer of the intermediate clapboard on described stage casing is provided with a circular trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420508224.9U CN204082677U (en) | 2014-09-04 | 2014-09-04 | A kind of single segment structure of multistage sectional centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420508224.9U CN204082677U (en) | 2014-09-04 | 2014-09-04 | A kind of single segment structure of multistage sectional centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN204082677U true CN204082677U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420508224.9U Expired - Fee Related CN204082677U (en) | 2014-09-04 | 2014-09-04 | A kind of single segment structure of multistage sectional centrifugal pump |
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| Country | Link |
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| CN (1) | CN204082677U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524603A (en) * | 2017-10-20 | 2017-12-29 | 项达章 | A kind of vertical two-stage centrifugal pump |
| CN110159585A (en) * | 2019-05-23 | 2019-08-23 | 西华大学 | A kind of disk impeller of pump |
-
2014
- 2014-09-04 CN CN201420508224.9U patent/CN204082677U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524603A (en) * | 2017-10-20 | 2017-12-29 | 项达章 | A kind of vertical two-stage centrifugal pump |
| CN110159585A (en) * | 2019-05-23 | 2019-08-23 | 西华大学 | A kind of disk impeller of pump |
| CN110159585B (en) * | 2019-05-23 | 2024-02-13 | 西华大学 | Disc pump impeller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20180904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |