CN102619780A - Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller - Google Patents
Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller Download PDFInfo
- Publication number
- CN102619780A CN102619780A CN2012101274601A CN201210127460A CN102619780A CN 102619780 A CN102619780 A CN 102619780A CN 2012101274601 A CN2012101274601 A CN 2012101274601A CN 201210127460 A CN201210127460 A CN 201210127460A CN 102619780 A CN102619780 A CN 102619780A
- Authority
- CN
- China
- Prior art keywords
- impeller
- water
- pump
- stage
- stator
- 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
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal pump for balancing axial force of a reversely-arranged last-stage impeller. In a pump barrel, from a water inlet of a water pump, a first-stage impeller, a last-stage impeller, and a first-stage guide vane and a last-stage guide vane which are matched with the impellers are arranged on a pump shaft in sequence, wherein the water inlet directions of the first-stage impeller and the last-stage impeller are opposite; one side surface of the last-stage guide vane back to an impeller mounting pit is sunken inwards to form a flow guiding layer, and a water outlet layer is arranged on the surface of the last-stage guide vane around the flow guiding layer; a plurality of flow passage tail separation cavities communicated with the first-stage guide vane are formed at the periphery of the last-stage guide vane, a water outlet separation cavity is formed between adjacent flow passage tail separation cavities, and each flow passage tail separation cavity is communicated with the flow guiding layer; the flow guiding layer is communicated with a water inlet of the last-stage impeller; one side of each water outlet separation cavity is communicated with the impeller mounting pit, and the other side is communicated with the water outlet layer; and the water outlet layer is communicated with a motor. The centrifugal pump has a small shape, an attractive appearance and a simple structure, and is easy to produce.
Description
Technical field
The present invention relates to the multistage centrifugal water pump and make the field, be specifically related to the matched a kind of final stage stator of reversed arrangement impeller balancing axial thrust.
Background technique
The axial force balance method that the multistage centrifugal water pump is commonly used has two kinds of balancing drum, Balance discs; All there is the backflow of leaking to expend the energy, causes pump performance to descend, take the drawback that axial length increases water pump length, cost of possession, external pressure release return pipe; Counterbalance effect is relatively poor, thrust bearing still need be installed bear residual axial force.The method of the forward and reverse symmetric arrangement impeller that seldom adopts promptly is that the water inlet with two groups of impellers is contained on the axle in the opposite directionly, its end thrust balancing axial thrust of cancelling out each other; This method good balance effect, there be not backflows of leaking, but the necessary symmetric arrangement of forward and reverse impeller, promptly forward and reverse impeller quantity is identical; Increase lift and need to increase in pairs impeller; The lift span is big, applicability is relatively poor, if reduce lift through the method for cutting impeller diameter, and decrease in efficiency, cost height.Also the need intake whole water outlets of impeller sets of the method for forward and reverse symmetric arrangement impeller import the water intake of reverse impeller groups, and the employing method has the external honeycomb duct of the pump housing, and owing to the water guide amount is big, the honeycomb duct size is also big, have caused that profile is strange, the bodily form is big, cost is high.Also have adopt to increase the pump housing, being divided into double-layer channel (asking for an interview number of patent application is 200710071499.5, and patent name is a kind of patent of invention of water pump reflux) in the pump, to solve profile strange, and the problem that the bodily form is big, cost of production is high still exists.Pump shaft mechanical seal takies axial length increases water pump length and cost.The increase of pump shaft length can cause the running of pump shaft to increase around moving, and running increases around moving; Bearing and impeller intake sealing surface wear are accelerated; Be that damage of bearings is accelerated, water pump waste backwater strengthens, decreased performance is accelerated, the water pump design should be shortened pump shaft length as far as possible, increases the service life.
Summary of the invention
The present invention will solve the shortcoming described in the background technique, realizes the axial force balance of multistage centrifugal pump, and release Equilibrator, pump shaft mechanical seal take axial length, and a kind of innovation structure of final stage stator is provided.
For realizing above purpose; Technological scheme below the present invention has taked: a kind of centrifugal pump of reversed arrangement impeller balancing axial thrust, include the water pump and the motor of pump shaft, motor shaft direct connection, water pump one end is pump cover; The pump cover center is a water intake; The pump cover inboard is peripherally equipped with pump barrel, on the pump shaft that begins in the pump barrel, from pump intake first stage impeller, impeller is housed successively, and the chopped-off head stator, the final stage stator that are complementary with impeller; Water intake is communicated with first stage impeller; The water inlet of first stage impeller and impeller is in the opposite direction; Final stage stator middle part is provided with the impeller that impeller is installed pit is installed; The side indent that the final stage stator deviates from impeller installation pit is formed with the water conservancy diversion layer, sets out water layer on the final stage stator surface around the water conservancy diversion layer; The a plurality of flow field end separate spaces that are connected with the chopped-off head stator of final stage stator outer periphery are formed with the water outlet separate space between the terminal separate space of adjacent channels, and each flow field end separate space communicates with the water conservancy diversion layer; The water conservancy diversion layer communicates with the impeller water intake; Each water outlet separate space one side is installed pit with impeller and is communicated, and a side communicates with water-yielding stratum, and this water-yielding stratum communicates with the motor water outlet; If the non-water-cooled machine of employing, water-yielding stratum directly communicates with pump outlet.
Also comprise the embedded mechanical seal that is installed in the impeller inlet, the rotary packing ring of mechanical seal is housed, the embedded water outlet dividing plate middle inside position that is installed in of the stationary seal ring of mechanical seal on the said pump shaft.Can effectively exempt pump shaft mechanical seal and take axial length.
Characteristics of the present invention are: reversed arrangement impeller, other impellers are that forward is arranged, forward arranges that impeller can be 1～4; And the impeller of reversed arrangement only is one; Utilize impeller and forward to arrange the opposite axial force of the impeller balancing axial thrust of cancelling out each other, if adopt a plurality of forwards to arrange impellers, the water pump design should be calculated forward earlier and arranged axial force of impeller; Calculate impeller water intake external diameter again; Impeller water intake external diameter confirms that the axial force of its rated lift confirms that concrete formula is following:
First stage impeller Axial Force Calculating formula: F
1=(π D
1 2÷ 4-π D
2 2÷ 4) ρ gH
1
Single stage casing axial force of impeller formula: F
2=(π D
3 2÷ 4-π D
2 2÷ 4) ρ gH
2
Impeller water intake external diameter formula:
Above formula character connotation is following:
F
1: first stage impeller axial force, unit: N
ρ: water density, 1000kg/m
3
G: gravity accleration, 9.8
π: Ratio of the circumference of a circle to its diameter
D
1: first stage impeller water intake external diameter, unit: m
D
2: axle sleeve external diameter, unit: m
H
1: first stage impeller rated lift, unit: m
F
2: stage casing axial force of impeller, unit: N
D
3: stage casing impeller intake external diameter, unit: m
H
2: stage casing impeller design lift, unit: m
D: impeller water intake external diameter, unit: m
N: stage casing impeller quantity
D
4: the diameter of axle, unit: m
H
3: impeller rated lift, unit: m
Forward arranges that impeller is a plurality of; The impeller water inlet aperture is greater than the required bore of pump capacity; The mechanical seal of the embedded installation pump shaft of redundant space, forward arrange that impeller is single, and forward, reversed arrangement impeller intake are directly pressed pump shaft mechanical seal occupation area and increased; The mechanical seal of embedded installation pump shaft, current are taken away the heat that friction produces through sealing surface.Each flow field end separate space of final stage stator communicates with the water conservancy diversion layer; The water outlet of forward layout impeller is gone into the reversed arrangement impeller eye through terminal separate space, water conservancy diversion laminar flow; Each water outlet separate space of final stage stator communicates with water-yielding stratum; Water outlet flows into the motor housing cooling sandwith layer through water outlet separate space, water-yielding stratum, electric motor end cap pod apertures, and water outlet is discharged.
The present invention compared with prior art has following advantage: the one, and solved Balance disc, two kinds of balance methods of balancing drum and leaked to reflux and expend the energy, take axial length and increase the drawback that water pump length, cost of possession, external pressure release return pipe, counterbalance effect are relatively poor, thrust bearing is installed.The 2nd, solved the drawback that external honeycomb duct, the bodily form are big, cost is high that forward and reverse symmetric arrangement impeller exists, also solved the big drawback of lift span that forward and reverse symmetric arrangement impeller exists more than 2 grades.The 3rd, exempt Equilibrator, pump shaft mechanical seal takies axial length, shorter pump shaft length can reduce the running of pump shaft around moving, prolongs water pump working life.The 4th, little, attractive in appearance, simple in structure, the easy production of the bodily form.
Description of drawings
Fig. 1 is the sectional structure schematic representation of pump of the present invention;
Fig. 2 final stage stator planimetric map;
Fig. 3 is a final stage guide vane structure schematic representation ();
Fig. 4 is a final stage guide vane structure schematic representation (two);
Fig. 5 is the electric motor end cap plan view;
Fig. 6 is the side sectional view of Fig. 5;
Fig. 7 is final stage stator and impeller assembly structure schematic representation;
Description of reference numerals: water intake 1, flange facing 2, the flange bolt hole 3 of band tooth, pump cover 4, pull bar screw 5, O type circle 6, chopped-off head stator 7; Pump barrel 8, stage casing stator 9, water outlet separate space 10, water-yielding stratum 11, electric motor end cap 12, water outlet dividing plate 13; Pod apertures 14, screw 15, motor housing cooling sandwith layer water inlet 16, motor housing 17, motor housing cooling sandwith layer 18, motor 19; Water outlet 20, water conservancy diversion layer 21, flow field end separate space 22, final stage stator 23, impeller 24, stage casing impeller 25; Water pump 26, first stage impeller 27, pump shaft 28, water outlet dividing plate osculum 29, mechanical seal 30, motor shaft 31; Water retaining ring 32, stationary seal ring 33, rotary packing ring 34, drain chamber 35, rhone 36, impeller is installed pit 37.
Embodiment
Below in conjunction with accompanying drawing and embodiment content of the present invention is explained further details.
Embodiment:
See also Fig. 1 to shown in Figure 4, a kind of water-cooled self balancing centrifugal pump includes the water pump 26 and the motor 19 of pump shaft 28, motor shaft 31 direct connections; 19 in water pump 26 and motor are provided with drain chamber 35 and water retaining ring 32, and water pump 26 water intakes 1 are positioned at same straight line with water outlet 20, can directly go here and there to be contained on the pipeline; Water pump 26 1 ends are pump cover 4; Pump cover 4 centers are water intake 1, pump cover 4 outer side center projection flange facings 2, the flange bolt hole 3 of ring center arrangement band tooth; Pump cover 4 inboards are peripherally equipped with pump barrel 8; Pump cover 4 and pump barrel 8 be through 6 sealings of O type circle, in the pump barrel 8, from the pump shaft 28 of water pump 26 water intakes 1 beginning, first stage impeller 27, impeller 24 are housed successively, and the chopped-off head stator 7, the final stage stator 23 that are complementary with impeller; Among the present invention, can only require first stage impeller 27 and chopped-off head stator 7 are installed, be convenient explanation the present invention; In the present embodiment, stage casing impeller 25 is housed successively behind first stage impeller 27 also, and the stage casing stator 9 that is complementary with stage casing impeller 25; Chopped-off head stator 7 seals through O type circle 6 with pump barrel 8; Stage casing stator 9 seals through O type circle 6 with final stage stator 23, and first stage impeller 27 is in the opposite direction with the water inlet of impeller 24, in the present embodiment; First stage impeller 27, chopped-off head stator 7, stage casing impeller 25, stage casing stator 9 and impeller 24 are general structure, therefore no longer detail in the present embodiment.
The characteristics of present embodiment are: please combine Fig. 2, Fig. 3, Fig. 4, shown in Figure 7; Be provided with the impeller that impeller 24 is installed at final stage stator 23 middle parts pit 37 is installed; The side indent that final stage stator 23 deviates from impeller installation pit 37 is formed with water conservancy diversion layer 21, sets out water layer 11 on final stage stator 23 surfaces around the water conservancy diversion layer 21; A plurality of and the chopped-off head stator 7 (stator that is equivalent to upper level of final stage stator 23 outer periphery; Be the stage casing stator in the present embodiment) the flow field end separate space 22 that is connected; Be formed with water outlet separate space 10 between the terminal separate space 22 of adjacent fluid channels, each flow field end separate space 22 communicates with water conservancy diversion layer 21, and water conservancy diversion layer 21 communicates with impeller 24 water intakes; Each water outlet separate space 10 1 side is installed pit 37 with impeller and is communicated; One side communicates with water-yielding stratum 11, and in the present embodiment, water-yielding stratum 11 communicates with motor 19 water outlets 20.
Separate fully through O type circle 6 and 13 sealings of water outlet dividing plate between water conservancy diversion layer 21 and the water-yielding stratum 11; Also comprise the embedded mechanical seal 30 that is installed in the inlet of impeller 24; The stationary seal ring 33 of mechanical seal 30 is equipped with at water outlet dividing plate 13 middle parts, and with the rotary packing ring that is contained in the mechanical seal 30 on the pump shaft 28 34 sealings, water outlet dividing plate osculum 29 is relative with electric motor end cap pod apertures 14; Through 6 sealings of O type circle; Pump barrel 8 seals through O type circle 6 with water outlet dividing plate 13, and 12 of pump cover 4 and electric motor end caps are established pull bar screw 5, fastening water pump part.Electric motor end cap 12 pod apertures 14 are relative with motor housing cooling sandwith layer water inlet 16; Through 6 sealings of O type circle; Motor housing cooling sandwith layer 18 ends are provided with water outlet 20, terminal outer side center projection flange facing 2, the flange bolt hole 3 of ring center arrangement band tooth.Motor housing 17 is connected fixing with electric motor end cap 12 through screw 15.
As shown in Figure 6, electric motor end cap 12 ring central distribution pod apertures 14, water-yielding stratum 11 is to communicate with this pod apertures 14, electric motor end cap 12 middle part drain chamber 35 are interlinked to the outside through rhone 36 and pump.
Working procedure: water flows into first stage impeller 27 from water intake 1; Pressurization is after chopped-off head stator 7 importing stage casing impellers 25; Pressurization is after the flow field end separate space 22 that stage casing stator 9 imports on the final stage stator 23 flows into impeller 24 through water conservancy diversion layer 21, and pressurization is after the water-yielding stratum 11 that the water outlet separate space 10 of final stage stator 23, final stage stator 23 flows on the final stage stator 23; Flow into motor housing cooling sandwith layer 18 through electric motor end cap 12 pod apertures 14, discharge from water outlet 20.Pump shaft 28 mechanical seals 30 are if percolating water occurs, and water retaining ring 32 stops to splash and sprays into motor 19, flows to outside the pump through drain chamber 35 and rhone 36.
In the present embodiment; Impeller water inlet direction and first stage impeller, stage casing impeller are intake in the opposite direction; Impeller is the reversed arrangement impeller, and first stage impeller, stage casing impeller are called forward and arrange that (arrange impeller if impeller is called forward, first stage impeller, stage casing impeller then are called the reversed arrangement impeller to impeller; Forward, direction only are the directions of a definition, not as requirement for restriction).
As shown in Figure 1, first stage impeller water intake external diameter (D
1) be 0.038m, axle sleeve external diameter (D
2) be 0.028m, first stage impeller rated lift (H
1) be 25.2m, stage casing impeller intake external diameter (D
3) be 0.046m, stage casing impeller design lift (H
2) be 25.0m, stage casing impeller quantity is 1, the diameter of axle (D
4) be 0.020m, impeller rated lift (H
3) be 24.8m, according to above-mentioned first stage impeller Axial Force Calculating formula and relevant value, calculate first stage impeller axial force (F
1) ≈ 128N, according to above-mentioned single stage casing axial force of impeller formula and relevant value, calculate single stage casing axial force of impeller (F
2) ≈ 256N, according to above-mentioned impeller water intake external diameter formula and relevant value, calculate impeller water intake external diameter ≈ 0.060m.
Above-listed detailed description is to the specifying of possible embodiments of the present invention, and this embodiment is not in order to limiting claim of the present invention, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the claim of this case.
Claims (2)
1. the centrifugal pump of a reversed arrangement impeller balancing axial thrust; Include water pump (26); From the pump shaft (28) of water pump (26) water intake (1) beginning, first stage impeller (27), impeller (24) are housed successively, and the chopped-off head stator (7), the final stage stator (23) that are complementary with impeller; First stage impeller (27) is in the opposite direction with the water inlet of impeller (24);
It is characterized in that: said final stage stator (23) middle part is provided with the impeller that impeller (24) is installed pit (37) is installed; The side indent that final stage stator (23) deviates from impeller installation pit (37) is formed with water conservancy diversion layer (21), and water conservancy diversion layer (21) sets out water layer (11) on final stage stator (23) surface on every side; The a plurality of flow field end separate spaces (22) that are connected with chopped-off head stator (7) of final stage stator (23) outer periphery; Be formed with water outlet separate space (10) between the terminal separate space of adjacent channels (22); Each flow field end separate space (22) communicates with water conservancy diversion layer (21); Water conservancy diversion layer (21) communicates with impeller (24) water intake, and each water outlet separate space (10) one side is installed pit (37) with impeller and communicated, and a side communicates with water-yielding stratum (11).
2. the centrifugal pump of reversed arrangement impeller balancing axial thrust as claimed in claim 1; It is characterized in that: also comprise the embedded mechanical seal (30) that is installed in impeller (24) inlet; The rotary packing ring (34) of mechanical seal (30) is housed, embedded water outlet dividing plate (13) the middle inside position that is installed in of the stationary seal ring (33) of mechanical seal (30) on the said pump shaft (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101274601A CN102619780A (en) | 2012-04-26 | 2012-04-26 | Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101274601A CN102619780A (en) | 2012-04-26 | 2012-04-26 | Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102619780A true CN102619780A (en) | 2012-08-01 |
Family
ID=46559915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101274601A Pending CN102619780A (en) | 2012-04-26 | 2012-04-26 | Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102619780A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103636346A (en) * | 2013-12-13 | 2014-03-19 | 赵仕伟 | Lotus root digging machine and special water pump thereof |
| CN106337838A (en) * | 2016-10-21 | 2017-01-18 | 珠海格力电器股份有限公司 | Centrifugal compressor and air conditioner with same |
| CN106762681A (en) * | 2016-11-25 | 2017-05-31 | 武汉船用机械有限责任公司 | A kind of low temperature immersed pump |
| CN108757491A (en) * | 2018-05-31 | 2018-11-06 | 金华金力士泵业有限公司 | A kind of water pump |
| CN109654024A (en) * | 2019-01-28 | 2019-04-19 | 浙江科尔泵业股份有限公司 | Double-casing axially split type super-pressure coke cutting water pump |
| CN110005617A (en) * | 2019-04-19 | 2019-07-12 | 谱罗顿智控电子科技（浙江）有限公司 | A kind of intelligence centrifugal pump |
| CN110529383A (en) * | 2019-10-10 | 2019-12-03 | 兰州理工大学 | A kind of multistage pump Flow vibration inhibition device |
| WO2023000477A1 (en) * | 2021-07-23 | 2023-01-26 | 华工(江门)机电有限公司 | Mounting seat, electric-motor mounting structure, and inline pump |
| CN116733751A (en) * | 2023-07-19 | 2023-09-12 | 江苏大学流体机械温岭研究院 | Multistage pump bi-pass structure and multistage centrifugal pump |
| CN117514814A (en) * | 2021-12-24 | 2024-02-06 | 三峡大学 | Centrifugal separation sewage pump device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378554Y (en) * | 1999-06-14 | 2000-05-17 | 刘延军 | Self-balancing multi-stage centrifugal water pump |
| WO2007115471A1 (en) * | 2006-03-28 | 2007-10-18 | Wanzhi Jiang | A multi-channels impeller centrifugal pump |
| CN201661510U (en) * | 2010-03-10 | 2010-12-01 | 福建省福安市威迪电机有限公司 | Guide impeller of multistage centrifugal pump and multistage centrifugal pump |
| CN201747618U (en) * | 2010-08-20 | 2011-02-16 | 赣州水泵制造有限公司 | Dual-suction multistage centrifugal pump |
| CN201763613U (en) * | 2010-09-09 | 2011-03-16 | 重庆水泵厂有限责任公司 | High-pressure self-balance horizontal multistage centrifugal pump |
| CN202117938U (en) * | 2011-06-15 | 2012-01-18 | 开利泵业(集团)有限公司 | Low-noise vertical centrifugal pump |
-
2012
- 2012-04-26 CN CN2012101274601A patent/CN102619780A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378554Y (en) * | 1999-06-14 | 2000-05-17 | 刘延军 | Self-balancing multi-stage centrifugal water pump |
| WO2007115471A1 (en) * | 2006-03-28 | 2007-10-18 | Wanzhi Jiang | A multi-channels impeller centrifugal pump |
| CN201661510U (en) * | 2010-03-10 | 2010-12-01 | 福建省福安市威迪电机有限公司 | Guide impeller of multistage centrifugal pump and multistage centrifugal pump |
| CN201747618U (en) * | 2010-08-20 | 2011-02-16 | 赣州水泵制造有限公司 | Dual-suction multistage centrifugal pump |
| CN201763613U (en) * | 2010-09-09 | 2011-03-16 | 重庆水泵厂有限责任公司 | High-pressure self-balance horizontal multistage centrifugal pump |
| CN202117938U (en) * | 2011-06-15 | 2012-01-18 | 开利泵业(集团)有限公司 | Low-noise vertical centrifugal pump |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103636346A (en) * | 2013-12-13 | 2014-03-19 | 赵仕伟 | Lotus root digging machine and special water pump thereof |
| CN103636346B (en) * | 2013-12-13 | 2016-04-13 | 赵仕伟 | Lotus root digging harvester and Special water pump thereof |
| CN106337838A (en) * | 2016-10-21 | 2017-01-18 | 珠海格力电器股份有限公司 | Centrifugal compressor and air conditioner with same |
| CN106762681A (en) * | 2016-11-25 | 2017-05-31 | 武汉船用机械有限责任公司 | A kind of low temperature immersed pump |
| CN106762681B (en) * | 2016-11-25 | 2018-07-06 | 武汉船用机械有限责任公司 | A kind of low temperature immersed pump |
| CN108757491A (en) * | 2018-05-31 | 2018-11-06 | 金华金力士泵业有限公司 | A kind of water pump |
| CN109654024A (en) * | 2019-01-28 | 2019-04-19 | 浙江科尔泵业股份有限公司 | Double-casing axially split type super-pressure coke cutting water pump |
| CN110005617A (en) * | 2019-04-19 | 2019-07-12 | 谱罗顿智控电子科技（浙江）有限公司 | A kind of intelligence centrifugal pump |
| CN110529383A (en) * | 2019-10-10 | 2019-12-03 | 兰州理工大学 | A kind of multistage pump Flow vibration inhibition device |
| WO2023000477A1 (en) * | 2021-07-23 | 2023-01-26 | 华工(江门)机电有限公司 | Mounting seat, electric-motor mounting structure, and inline pump |
| CN117514814A (en) * | 2021-12-24 | 2024-02-06 | 三峡大学 | Centrifugal separation sewage pump device and method |
| CN116733751A (en) * | 2023-07-19 | 2023-09-12 | 江苏大学流体机械温岭研究院 | Multistage pump bi-pass structure and multistage centrifugal pump |
| CN116733751B (en) * | 2023-07-19 | 2024-05-14 | 江苏大学流体机械温岭研究院 | Multistage pump bi-pass structure and multistage centrifugal pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102619780A (en) | Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller | |
| CN105604952A (en) | Vertical centrifugal oil pump | |
| CN105626540A (en) | Sectional multistage centrifugal pump | |
| CN203067338U (en) | High pressure centrifugal pump maze seal device | |
| CN203822655U (en) | Pump for continuous reforming device | |
| CN102011728A (en) | Gather and delivery pump set for thick oil containing sand | |
| CN202971221U (en) | Submersible electric pump | |
| CN102628451A (en) | Centrifuge pump with reversely arranged last stage blade for balancing axial force | |
| CN202417954U (en) | Nuclear secondary pump charging pump of 1000MW nuclear power station | |
| CN202833185U (en) | Double-suction multi-stage horizontal mid-split pump | |
| CN102828960B (en) | Double suction multistage horizontal split pump | |
| CN202833186U (en) | Double-suction multi-stage horizontal-type mid-split pump | |
| CN206190540U (en) | Multistage water pump | |
| CN205618369U (en) | Hua longyi nuclear power technology uses and fills pump | |
| CN204921450U (en) | Reverse osmosis seawater desalts multistage high -pressure pump | |
| CN201236839Y (en) | Centrifugal pump | |
| CN210509695U (en) | Water pump axial force self-balancing device | |
| CN201209567Y (en) | Low temperature-lifting energy-conserving total lift submersible pump | |
| CN102734223A (en) | Process pump for petrochemical industry | |
| CN108730195B (en) | Special impact welding multistage shielding pump for wind power generation converter | |
| CN201461460U (en) | submersible pump | |
| CN200940573Y (en) | Novel multistage pump | |
| CN202100479U (en) | High pressure coking removing water pump for oil refinery delay coking device | |
| CN207701374U (en) | A multi-stage drainage pump with balanced axial force | |
| CN105179297B (en) | Reverse osmosis seawater desalination multistage high pressure pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120801 |