CN104791254A - High-power axial subdivision double-suction two-staged pump - Google Patents
High-power axial subdivision double-suction two-staged pump Download PDFInfo
- Publication number
- CN104791254A CN104791254A CN201510191981.7A CN201510191981A CN104791254A CN 104791254 A CN104791254 A CN 104791254A CN 201510191981 A CN201510191981 A CN 201510191981A CN 104791254 A CN104791254 A CN 104791254A
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- CN
- China
- Prior art keywords
- pump
- stage
- impeller
- suction
- axial subdivision
- 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.)
- Pending
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Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2216—Shape, geometry
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a pump, in particular to an axial subdivision double-suction two-staged pump. The high-power axial subdivision double-suction two-staged pump comprises a pump body, a pump cover, a pump shaft, a first-stage impeller, a second-stage impeller, a bearing assembly, an impeller ring, a jetting-out bush, an inter-stage bush, a throttling bush, a suck-in bush and a sealing assembly, wherein the first-stage impeller is of a double-suction structure; the second-stage impeller is of a single-suction structure; a transition runner is located between the first-stage impeller and the second-stage impeller; disperse type liquid division plates are additionally arranged on the upper and lower sides of a discharging port of the transition runner; the inter-stage bush with a curved outer back surface is arranged on the pump shaft between the first-stage impeller and the second-stage impeller; the liquid division plates are welded to the curved surface of the inter-stage bush. The high-power axial subdivision double-suction two-staged pump has the advantages of being stable and efficient to operate, safe, reliable, convenient to maintain, long in service life and the like.
Description
Technical field
The present invention relates to a kind of pump, be specifically related to a kind of axial subdivision double suction two stage pump.
Background technique
At present, domestic flow 2500m
3/ h, lift 400m, power are blank more than the single pump assembly of 3500kw.Generally use two cover pump assembly parallel connections to use at present, reduced by half by flow and meet working condition requirement.Realize according to single pump assembly, due to flow and power large, so require more harsh to the Design and manufacture of set steady, the smooth transition of runner waterpower, axial force balanced radial force, vibratory impulse control etc., become the obstacle that the research and development of this type of pump are difficult to go beyond.
Summary of the invention
For above-mentioned Problems existing, the object of this invention is to provide the high-power axial subdivision double suction two stage pump of the high-lift medium of a kind of applicable conveying large discharge, ensure that unit waterpower is excessively steady, convenient disassembly, stable, safe and reliable.
Object of the present invention is realized by following technical proposals: propose a kind of high-power axial subdivision double suction two stage pump, comprise the pump housing, pump cover, pump shaft, first stage impeller, secondary impeller, bearing part, pump housing choma, spue lining, internal liner, nockbush, suck lining and sealed member, first stage impeller is double suction structure, secondary impeller is single suction structure, transition runner is between first stage impeller and secondary impeller, the upper and lower both sides of exhaust port of transition runner have additional discrete type liquid separatnig plate, pump shaft between first stage impeller and secondary impeller is provided with the internal liner that back outer surface is curved surface, the curved surface place of internal liner is welded with liquid separatnig plate.
The intet diameter of described first stage impeller is greater than 500mm.
The diameter of described first stage impeller and secondary impeller is greater than 700mm, and the diameter of secondary impeller is greater than first stage impeller diameter, and both diameter difference are greater than 50mm.
Described transition runner is S type runner.
Described pump housing choma, internal liner, nockbush, suction lining and spue lining all with head sea type maze trough structure.
The setting position of described discrete type liquid separatnig plate lays respectively at 1/4,1/2,3/4 place of transition runner area.
Described pump cover adopts middle open type pump cover.
Described pump cover is provided with gusset along waterpower dispersal direction.
The described pump housing is provided with gusset along waterpower dispersal direction.
Described bearing part and sealed member adopt seam to coordinate with the pump housing.
The present invention has the features such as stable efficient, safe and reliable, easy to maintenance, long service life, is embodied in:
1. first stage impeller adopts double suction structure, and inlet calibre is greater than 500mm, and suction chamber Flow area is large, and flow channel cross-section is wide, is conducive to the inlet capacity ensureing impeller, reduces cavitation erosion performance.Secondary impeller adopts single suction structure, secondary impeller diameter 50mm more than larger than first stage impeller diameter, ensures that transition runner is excessively smooth, reduces water hammer.
2. adopt water hammer leading method to reduce vibration, be embodied as transition runner exhaust port and set up discrete type liquid separatnig plate, the mutual shock of the secondary suction waterpower that decays, reduce the unit vibration that waterpower pulse causes.
3. the pump shaft between first stage impeller and secondary impeller is provided with the internal liner that back outer surface is curved surface, the curved surface place of internal liner is welded with liquid separatnig plate, be conducive to cushioning the suction passage water hammer pulse of secondary impeller, ensure that secondary impeller suction port obtains well stable inlet capacity.The technology reduces the key point of hull vibration.
4. adopt the high-lift design of low speed, impeller diameter, higher than Φ 700mm, adopts " S " to spread gradual change form novel transition runner, namely increases transition runner radial dimension, reduce transition runner axial dimension between both stage impellers.
5. adopt high-efficiency hydraulic model design, choma, internal liner, nockbush, suction lining, the lining that spues adopt head sea type maze trough structure, and maze trough entrance points to influent stream direction, can effectively reduce linear loss between friction pair thus improve hydraulic efficiency.
6. pump cover and the pump housing are provided with reinforcement gusset along waterpower dispersal direction, are conducive to the rigidity, the reinforcement set steady that increase pump assembly; Open form formula during pump cover adopts, imports and exports flange design on the pump housing, while not disassembling system pipeline, can realize that the pump housing is safeguarded, inspect and change rotor, simplify maintenance and the maintenance flow of pump.
7. bearing part and sealed member are connected with pump case and use seam to coordinate, and are conducive to reducing the mechanical seal proportion of goods damageds in pump disassembly process.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is the partial enlarged drawing at I place in Fig. 1;
Fig. 3 is the partial enlarged drawing at II place in Fig. 1;
Fig. 4 is the partial enlarged drawing at III place in Fig. 1;
Fig. 5 is pump cover of the present invention and pump housing reinforcing plate structure figure.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail
High-power axial subdivision double suction two stage pump as shown in Figure 1, comprises the pump housing 4, pump cover 5, pump shaft 2, first stage impeller 9, secondary impeller 12, bearing part 1, pump housing choma 8, the lining 18 that spues, internal liner 10, nockbush 13, sucks lining 6, driving side sealed member 3, non-drive side sealed member 14 and locking nut 7.First stage impeller 9 is double suction structure, secondary impeller 12 is single suction structure, transition runner is between first stage impeller 9 and secondary impeller 12, pump shaft 2 between first stage impeller 9 and secondary impeller 12 is provided with the internal liner 10 that back outer surface is curved surface, the curved surface place of internal liner 10 is welded with liquid separatnig plate 11.
Rotor part mainly comprises pump shaft 2, first stage impeller 9, secondary impeller 12 etc., and rotor part is placed in the pump housing 4, and after removing bearing part 1, non-drive side sealed member 14, remove pump cover 5, rotor part can entirety hang out, and is convenient to carry out installing/dismounting.Pump intake is positioned at first stage impeller side, i.e. driving side, and exhaust port is positioned at secondary single suction impeller side, i.e. non-drive side.
As shown in Figure 2, discrete type liquid separatnig plate 15 is set up in the upper and lower both sides of transition runner exhaust port, after medium throws away from first stage impeller 9, after transition runner inlet collector, mixed flow, fusion, directly enter through collision type flex point that discrete type liquid separatnig plate 15 carries out shunting, combing, finally gather the suction port place to secondary impeller 12.Set up medium waterpower pulse buffer district by mechanical type shunting, ensure set steady.
As shown in Figure 3, internal liner 10 back outer surface surface blending, medium, after the vertical drop of transition runner long and narrow discharge section, is cushioned by curved surface, reduces water hammer gradually, slow down and stablize flow velocity.By welding liquid separatnig plate 11 points of flow mediums, ensure that secondary impeller 12 suction port obtains well stable inlet capacity, inter-stage axle sleeve 16 plays the effect of protection axle.
As shown in Figure 4, pump housing choma 8, internal liner 10, nockbush 13, suction lining 6, the lining 18 that spues all adopt novel reverse wave mode maze trough to design, and maze trough entrance points to influent stream direction.Can effectively reduce linear loss between friction pair thus improve hydraulic efficiency, impeller port ring 17, axle sleeve 19 and locking nut 20 pairs of impellers and pump shaft 2 play a protective role.
As shown in Figure 5, pump cover 5 arranges left gusset 21, upper gusset 22 and right web plate 23 along waterpower dispersal direction, along waterpower diffused sheet gusset 24, upper gusset 25 and right web plate 26 left on the pump housing 4.Being provided with of gusset is beneficial to increase pump assembly rigidity, strengthens set steady.Open form formula during pump cover 5 adopts, imports and exports flange design on the pump housing, opens maintenance, inspect and change rotor that pump cover 5 can realize pump, without the need to disassembling system pipeline, simplify maintenance and the maintenance flow of pump.
The present invention is applicable to carry lean solution, the semi lean solution in coal liquifaction relevant apparatus, the poor methanol in low temperature washing device for methanol, absorption tower charging etc.There is the features such as stable efficient, safe and reliable, easy to maintenance, long service life.
Claims (10)
1. a high-power axial subdivision double suction two stage pump, comprise the pump housing, pump cover, pump shaft, first stage impeller, secondary impeller, bearing part, pump housing choma, spue lining, internal liner, nockbush, suck lining and sealed member, it is characterized in that: first stage impeller is double suction structure, secondary impeller is single suction structure, transition runner is between first stage impeller and secondary impeller, the upper and lower both sides of exhaust port of transition runner have additional discrete type liquid separatnig plate, pump shaft between first stage impeller and secondary impeller is provided with the internal liner that back outer surface is curved surface, the curved surface place of internal liner is welded with liquid separatnig plate.
2. high-power axial subdivision double suction two stage pump according to claim 1, is characterized in that: the intet diameter of described first stage impeller is greater than 500mm.
3. high-power axial subdivision double suction two stage pump according to claim 1, it is characterized in that: the diameter of described first stage impeller and secondary impeller is greater than 700mm, the diameter of secondary impeller is greater than first stage impeller diameter, and both diameter difference are greater than 50mm.
4. high-power axial subdivision double suction two stage pump according to claim 1, is characterized in that: described transition runner is S type runner.
5. high-power axial subdivision double suction two stage pump according to claim 1, is characterized in that: described pump housing choma, internal liner, nockbush, suction lining and spue lining all with head sea type maze trough structure.
6. high-power axial subdivision double suction two stage pump according to claim 1, is characterized in that: the setting position of described discrete type liquid separatnig plate lays respectively at 1/4,1/2,3/4 place of transition runner area.
7., according to the arbitrary described high-power axial subdivision double suction two stage pump of claim 1-6, it is characterized in that: described pump cover adopts middle open type pump cover.
8., according to the arbitrary described high-power axial subdivision double suction two stage pump of claim 1-6, it is characterized in that: described pump cover is provided with gusset along waterpower dispersal direction.
9., according to the arbitrary described high-power axial subdivision double suction two stage pump of claim 1-6, it is characterized in that: the described pump housing is provided with gusset along waterpower dispersal direction.
10., according to the arbitrary described high-power axial subdivision double suction two stage pump of claim 1-6, it is characterized in that: described bearing part and sealed member adopt seam to coordinate with the pump housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191981.7A CN104791254A (en) | 2015-04-22 | 2015-04-22 | High-power axial subdivision double-suction two-staged pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191981.7A CN104791254A (en) | 2015-04-22 | 2015-04-22 | High-power axial subdivision double-suction two-staged pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104791254A true CN104791254A (en) | 2015-07-22 |
Family
ID=53556329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510191981.7A Pending CN104791254A (en) | 2015-04-22 | 2015-04-22 | High-power axial subdivision double-suction two-staged pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104791254A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020002948A (en) * | 2018-06-22 | 2020-01-09 | 株式会社荏原製作所 | Double suction volute pump |
| CN113417857A (en) * | 2021-07-02 | 2021-09-21 | 荏原机械淄博有限公司 | Volute type large-flow high-lift wear-resistant middle-open type multi-stage pump |
| CN115628218A (en) * | 2022-10-21 | 2023-01-20 | 合肥裕升热工技术有限公司 | Circulating pump for lead-based reactor |
Citations (11)
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| GB175530A (en) * | 1921-02-10 | 1922-02-23 | Mather & Platt Ltd | Improvements relating to centrifugal pumps |
| US2389753A (en) * | 1943-09-11 | 1945-11-27 | Allis Chalmers Mfg Co | High pressure centrifugal pump |
| US2641191A (en) * | 1946-11-12 | 1953-06-09 | Buchi Alfred | Guide means on impeller for centrifugal pumps or blowers |
| CN2104329U (en) * | 1991-10-14 | 1992-05-13 | 沈阳水泵厂 | Ays type two-level double-sucking oil centrifugal pump |
| CN201443520U (en) * | 2009-07-17 | 2010-04-28 | 山东长志泵业有限公司 | Three-stage heavy work station high temperature and high pressure centrifugal pump |
| CN201606258U (en) * | 2009-12-30 | 2010-10-13 | 大耐泵业有限公司 | Two-stage double-suction high-temperature high-pressure process pump |
| CN103758762A (en) * | 2014-02-13 | 2014-04-30 | 山东长志泵业有限公司 | Feeding pump for delay coking heating furnace |
| CN203717361U (en) * | 2014-02-13 | 2014-07-16 | 山东长志泵业有限公司 | Double suction double-stage anti-cavitation centrifugal oil pump |
| CN203822655U (en) * | 2014-05-23 | 2014-09-10 | 沈阳鼓风机集团石化泵有限公司 | Pump for continuous reforming device |
| CN204099215U (en) * | 2014-07-24 | 2015-01-14 | 浙江科尔泵业股份有限公司 | Huge discharge two supports formula three grades of centrifugal pumps |
| CN204646685U (en) * | 2015-04-22 | 2015-09-16 | 大连深蓝泵业有限公司 | High-power axial subdivision double suction two stage pump |
-
2015
- 2015-04-22 CN CN201510191981.7A patent/CN104791254A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB175530A (en) * | 1921-02-10 | 1922-02-23 | Mather & Platt Ltd | Improvements relating to centrifugal pumps |
| US2389753A (en) * | 1943-09-11 | 1945-11-27 | Allis Chalmers Mfg Co | High pressure centrifugal pump |
| US2641191A (en) * | 1946-11-12 | 1953-06-09 | Buchi Alfred | Guide means on impeller for centrifugal pumps or blowers |
| CN2104329U (en) * | 1991-10-14 | 1992-05-13 | 沈阳水泵厂 | Ays type two-level double-sucking oil centrifugal pump |
| CN201443520U (en) * | 2009-07-17 | 2010-04-28 | 山东长志泵业有限公司 | Three-stage heavy work station high temperature and high pressure centrifugal pump |
| CN201606258U (en) * | 2009-12-30 | 2010-10-13 | 大耐泵业有限公司 | Two-stage double-suction high-temperature high-pressure process pump |
| CN103758762A (en) * | 2014-02-13 | 2014-04-30 | 山东长志泵业有限公司 | Feeding pump for delay coking heating furnace |
| CN203717361U (en) * | 2014-02-13 | 2014-07-16 | 山东长志泵业有限公司 | Double suction double-stage anti-cavitation centrifugal oil pump |
| CN203822655U (en) * | 2014-05-23 | 2014-09-10 | 沈阳鼓风机集团石化泵有限公司 | Pump for continuous reforming device |
| CN204099215U (en) * | 2014-07-24 | 2015-01-14 | 浙江科尔泵业股份有限公司 | Huge discharge two supports formula three grades of centrifugal pumps |
| CN204646685U (en) * | 2015-04-22 | 2015-09-16 | 大连深蓝泵业有限公司 | High-power axial subdivision double suction two stage pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020002948A (en) * | 2018-06-22 | 2020-01-09 | 株式会社荏原製作所 | Double suction volute pump |
| JP7213141B2 (en) | 2018-06-22 | 2023-01-26 | 株式会社荏原製作所 | Double suction volute pump |
| CN113417857A (en) * | 2021-07-02 | 2021-09-21 | 荏原机械淄博有限公司 | Volute type large-flow high-lift wear-resistant middle-open type multi-stage pump |
| CN115628218A (en) * | 2022-10-21 | 2023-01-20 | 合肥裕升热工技术有限公司 | Circulating pump for lead-based reactor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150722 |