CN105805046A - Device for improving internal flow stability of diagonal flow pump - Google Patents
Device for improving internal flow stability of diagonal flow pump Download PDFInfo
- Publication number
- CN105805046A CN105805046A CN201610049529.1A CN201610049529A CN105805046A CN 105805046 A CN105805046 A CN 105805046A CN 201610049529 A CN201610049529 A CN 201610049529A CN 105805046 A CN105805046 A CN 105805046A
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- conduit
- stator
- impeller
- inlet
- circular outer
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
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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
- F04D29/18—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a device for improving internal flow stability of a diagonal flow pump. The device comprises an inlet section, a circular outer barrel, guide tubes, check valves, an impeller, guide vanes, a rotating shaft, and other parts, wherein the inlet section is directly connected with the circular outer barrel through flanges; 8 guide tubes are uniformly distributed on the circumference of the circular outer barrel; the part, connected with the impeller and guide vane bodies, of the rotating shaft is hollow; two holes are formed in the positions, corresponding to guide vane body flanges and guide vane inlets, of the rotating shaft; and a hole is formed in the position, near the back inlet side of each guide vane, of a hub. According to the device, under low flow working conditions, the guide vane inlets can easily suffer rotating stall, and when the backflow is severe, the backflow extends to the hub at an outlet of the impeller, so that the work of the impeller to the water body is greatly influenced, and the flow loss is increased; and high-pressure water of guide vane outlets enter the hollow section of the rotating shaft through the holes, and then flows into the guide vane inlets through the holes, so that the static pressure value of the guide vane inlets can be improved, the adverse pressure gradient is reduced, the rotating stall of the guide vanes is inhibited, and the lift and efficiency of the pump are improved.
Description
Technical field
The present invention relates to a kind of pump-type being usually used in large pumping station low lift, big flow, efficient district broadness, refer more particularly to the instable improvement of internal flow and the suppression to head curve " hump " district under diagonal pumps low flow rate condition, expand the range of application of diagonal pumps.
Background technology
Diagonal pumps are the pump-type that a kind of specific speed is higher, and its performance is between axial-flow pump and centrifugal pump.The hydraulic performance of centrifugal pump is good, but structure is complicated；Although axial-flow pump has the advantages such as simple in construction, floor space are little, but efficiently district is narrow, uses scope also narrow；But the advantage that diagonal pumps have had axial-flow pump and centrifugal pump concurrently, namely there is lift excursion in 3～30m and the advantage such as lift and power curve smooth, the efficient Qu Kuan of change, it is mainly used in agricultural drainage and irrigation, municipal administration plumbing, project of South-to-North water diversion, power plant for recirculated water, regional water transfer etc., is also applied in recent years in nuclear power, naval vessel hydraulic jet propulsion.Although there is plurality of advantages in diagonal pumps, but there is also weak point simultaneously.Diagonal pumps easily cause stall, backflow at impeller inlet cincture edge place under low flow rate condition so that runner blocking flows to hub area deflection, reduces the acting ability of blade convection cell；Under low flow rate condition, vane inlet is also susceptible to rotating stall near wheel hub simultaneously, causes the generation of backflow, and time serious, backflow can expand to impeller inlet wheel hub, thus affecting workmanship ability and the flow losses increase of impeller；When impact owing to being subject to rotating stall and backflow phenomenon makes diagonal pumps run under low flow rate condition, pressure fluctuation presents irregular phenomenon, and improve a lot under the amplitude of pressure fluctuation relatively design conditions, the security reliability that this strong influence diagonal pumps run.
Through retrieval, in improving diagonal pumps stability, Jiangsu University " a kind of diagonal pumps impeller Hydraulic Design Method " (application number: CN201410711980), this patent gives the design formula of the main geometry design parameter of impeller, makes the hydraulic efficiency of diagonal pumps impeller and diagonal pumps stability be increased by this method for designing.This patent is from the Hydraulic Design aspect of impeller to improve slope and the stability of impeller, and this patent is by the water under high pressure that stator exports is guided to impeller inlet and vane inlet, weaken impeller inlet wheel rim place and the rotating stall of vane inlet wheel hub, and then the appearance of suppression " hump " phenomenon, improve the stability of pump.
Summary of the invention
In order to weaken oblique flow pump blade inlet side wheel rim and the stall of vane inlet wheel hub, circulating flow strength under low flow rate condition；Improve diagonal pumps internal flow state, reduce diagonal pumps internal pressure fluctuation intensity under low flow rate condition, improve operation stability, the invention provides a kind of with low cost, simple in construction, just with the device of processing, easy accessibility.
Diagonal pumps of the present invention, including inducer, conduit, impeller, diffuser, pump shaft, circular outer cylinder, bend loss, bearing and mechanical seal etc..Inducer, circular outer cylinder, diffuser flange and bend loss connect fixing by pull bar, and inducer, circular outer cylinder, diffuser flange and bend loss are all positioned by concavo-convex chimeric mode and ensured concentricity.
Further, circular outer cylinder impeller inlet and stator exit circumferencial direction are uniform-distribution with 8 screws；
Further, by the conduit that 4 size thicknesses are consistent, the hole at impeller inlet place is connected with the hole in stator exit and by conduit successively called after conduit 1,2,3,4；Conduit 1 and conduit 4 are connected with circular outer cylinder by screw thread, and installation nut and gasket seal are screwed into after circular outer cylinder screw fastening nut to guarantee conduit and circular outer cylinder good seal until conduit again on conduit；Respectively through Flange joint between conduit and conduit；
Further, in the middle part of conduit 3, a valve it is provided with；Further, the part that pump shaft is connected with impeller and diffuser in addition is hollow, and opens two holes on the pump shaft of diffuser flange and vane inlet correspondence position respectively, opens 5 holes at stator back side inlet side wheel hub simultaneously；Impeller and pump shaft are fixed by interior hexagonal cylindrical screw, and rotate with pump shaft；Impeller and stator are positioned at circular outer cylinder；It is provided with oil sealing in diffuser guide vane wheel is firm；Prevent the highly pressurised liquid between diffuser and impeller from entering bearing, it is to avoid to cause the corrosion of bearing, affect the properly functioning of the pump housing.Diffuser installs additional bearing to realize stationary parts and be connected with the rolling of rotatable parts.
Further, circular outer cylinder impeller inlet and stator export and are uniform-distribution with 8 screwed holes on correspondence position circumferencial direction, and are connected by 4 conduits, are connected with flange respectively between 4 conduits.Main Function is by conduit, the water under high pressure in stator exit to be introduced impeller inlet wheel rim place to flow, add the flow in this region, reduce the angle of attack of import incoming flow, the adverse pressure gradient simultaneously also reducing impeller inlet wheel rim place suppresses the generation of stall, backflow, improve the flow stability of impeller internal, improve diagonal pumps lift and efficiency, it is suppressed that the generation of " hump " phenomenon.
Further, valve installed by conduit 3, under design discharge operating mode, impeller inlet wheel rim place will not occur stall to be therefore that the water under high pressure preventing stator from exporting enters impeller inlet needs one valve of installation on conduit 3 by conduit, and this valve is just unlatching under low flow rate condition.
Further, the part that pump shaft is connected with impeller and diffuser is hollow, and on the pump shaft of diffuser flange and vane inlet correspondence position, drive two holes stator back side inlet side wheel hub simultaneously respectively have 5 holes, its objective is by pump shaft hollow section, the water under high pressure in stator exit is introduced vane inlet place, the static pressure increasing stator back side import department reduces adverse pressure gradient and then suppresses stator rotating stall, improves pump lift and efficiency.
Beneficial effect of the present invention
Low flow rate condition lower inlet incoming flow impacts front side of vane, be susceptible to backflow at vacuum side of blade inlet side wheel rim place, stall event causes runner to block, making import reduce the acting ability of impeller to flow to the skew of wheel hub direction, there is " hump " phenomenon in flow lift curve.Impeller inlet produces stall, backflow also can make impeller inlet place amplitude of pressure fluctuation be multiplied the operational reliability of this strong influence pump.By conduit, the water under high pressure in stator exit is introduced impeller inlet wheel rim place to flow, add the flow in this region, and then reduce the angle of attack of import incoming flow, the adverse pressure gradient simultaneously also reducing impeller inlet wheel rim place suppresses the generation of stall, backflow, and then improve the flow stability of impeller internal, improve diagonal pumps lift and efficiency, also can suppress the generation of " hump " phenomenon simultaneously.Additionally, vane inlet is also susceptible to rotating stall under low flow rate condition, when even can reflux serious together, backflow can extend to impeller outlet wheel hub, and this greatly have impact on the acting ability of impeller, too increases flow losses simultaneously.The water under high pressure exported by stator introduces vane inlet, it is possible to the static pressure increasing stator back side import department reduces adverse pressure gradient and then well suppresses backflow to produce, and improves pump lift and efficiency.
Accompanying drawing explanation
Fig. 1 is the installation diagram of diagonal pumps of the present invention；
Fig. 2 is conduit and circular outer cylinder junction partial enlarged drawing；
Fig. 3 is the profile of inducer；
Fig. 4 is the left view of inducer；
Fig. 5 is circular outer cylinder profile；
Fig. 6 is circular outer cylinder left view；
Fig. 7 is circular outer cylinder screw enlarged drawing；
Fig. 8 is stator wheel hub profile；
Fig. 9 is stator hub body left view；
Figure 10 is pump shaft；
Figure 11 is the left view along section E, F.
1. hexagon socket cap head screw in Fig. 1,2. water guide cone, 3 seal washers, 4. nut, 5 general flat keys, 6. conduit 7. fillister head screw, 8. flange, 9. bolt, the 10. left oil sealing of bearing, 11 valves, 12. bearing, the 13. right oil sealings of bearing, 14. bend loss, 15. mechanical seals, end cover after 16., 17. shaft coupling, 18. inducers, 19. thick hexagonnuts, 20. circular outer cylinders, 21. pull bar, 22. blades, 23. runner bosses, 24. diffusers, 25. stator, 26. streamlined floors, 27.O RunddichtringO, 28 pump shafts.
In Fig. 2, A is conduit and circular outer cylinder left junction partial enlarged drawing, and B is conduit and circular outer cylinder right junction partial enlarged drawing.
In Fig. 7, C is the left screw partial enlarged drawing of circular outer cylinder, and D is the right screw partial enlarged drawing of circular outer cylinder.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
These diagonal pumps are by (1) hexagon socket cap head screw as shown in Figure 1, (2) water guide cone, (3) seal washer, (4) nut, (5) general flat key, (6) conduit (7) fillister head screw, (8) flange, (9) bolt, (10) the left oil sealing of bearing, (11) valve, (12) bearing, (13) the right oil sealing of bearing, (14) hole, (15) bend loss, (16) end cover afterwards, (17) shaft coupling, (18) inducer, (19) thick hexagonnut, (20) circular outer cylinder, (21) pull bar, (22) blade, (23) runner boss, (24) hole, (25) diffuser, (26) streamlined floor, (27) O RunddichtringO, (28) pump shaft.Inducer (18) is attached fixing by pull bar (21) and circular outer cylinder (20), and inducer (18) and circular outer cylinder (20) are positioned by concavo-convex chimeric mode and ensured concentricity；Circular outer cylinder (20) and diffuser (25) and bend loss (15) are also be attached fixing by flange by pull bar (21), are also the modes adopting concavo-convex embedding in order to ensure quick and easy for installation and the accuracy circular outer cylinder flange of concentricity, diffuser flange and pipe section flange；Inducer (18), circular outer cylinder (20), diffuser (24) and bend loss (15) are all sealed by O RunddichtringO (28)；Conduit (6) and circular outer cylinder (20) are threaded connection, and then tighten with nut (4) for preventing the liquid leakage in circular outer cylinder (20) from needing to install seal washer (3) again；Conduit (6) and conduit (6) are to be attached by flange (8) and bolt；Or can also connect by other means between conduit, as increased flat pipe and cap nut, adopting catheter connection device etc., at conduit (6), a valve (11) is above installed；Water guide cone (2) hexagon socket cap head screw (1) is fixed on runner boss (23)；Impeller inlet incoming flow is not only played guide functions by water guide cone, moreover it is possible to determine the runner boss (23) axial location on pump shaft (28)；Blade (22) is fixed on runner boss (23) by fillister head screw (7)；One bearing (12) is installed in diffuser (25), is realized the connection of stationary parts and rotatable parts by bearing；The left oil sealing of bearing (10) and the right oil sealing of bearing (13) it is respectively provided with at bearing (12) two ends, left and right, prevent the gap that liquid passes through between pump shaft (28) and diffuser (25) from entering the corrosion causing bearing in bearing (12), in addition with anti-impurity effect；Streamlined floor (26) is through being weldingly fixed on diffuser flange；Shaft coupling (17) connects pump shaft (28) and machine shaft.
A kind of device improving diagonal pumps internal flow stability, mainly includes seal washer (3), nut (4), conduit (6), valve (11), flange (8), bolt (9), inducer (18), circular outer cylinder (20), runner boss (23), blade (22), diffuser (25), the device such as pump shaft (28) composition.Described circular outer cylinder (20) impeller inlet and stator outlet correspondence position circumferencial direction are uniform-distribution with 8 screwed holes；Described circular outer cylinder (20) and conduit (6) are to be attached by screw thread, then tighten with nut (4) conduit (6) one gasket seal (3) of upper installation for preventing the liquid leakage in runner envelope from needing again；Fix between described conduit (6) with conduit (6) and be connected；Will not there is stall in impeller under design conditions, therefore the liquid that stator exports need not be led into impeller inlet wheel rim, and at conduit (6) one valve of upper installation, this valve is only just opened under low flow rate condition；Described pump shaft (28) first half section adopts hollow, and on the pump shaft of diffuser flange and vane inlet correspondence position, open two holes respectively, stator back side inlet side wheel hub also has 5 holes simultaneously, thus the water under high pressure in stator exit is introduced vane inlet place by pump shaft hollow section.
Further, circular outer cylinder (20) circumferencial direction is uniform-distribution with screwed hole of the same size, and the angle of screwed hole centrage and coordinate axes is 45 degree.
Further, the screwed hole on circular outer cylinder (20) is positioned at the position corresponding to impeller inlet and stator outlet.
Further, by conduit (6), the screwed hole that circular outer cylinder impeller inlet and stator export correspondence position is attached, when diagonal pumps operate under low flow rate condition, vacuum side of blade is susceptible to backflow, stall and then forms low-pressure area, the water under high pressure that stator exports can be incorporated into impeller inlet wheel rim place by conduit；Thus reducing the adverse pressure gradient in this region and reducing backflow generation, thus improving the flow regime of fluid in impeller, improve pump performance, it is suppressed that the appearance in " hump " district.
Further, conduit (6) being provided with a valve (11), the hole at impeller inlet place is connected and by called after conduit of conduit 1,2,3,4 by the conduit consistent by 4 size thicknesses with the hole in stator exit；It is connected respectively through flange and bolt between conduit with conduit；Under design discharge operating mode will not there is stall in impeller inlet wheel rim place, therefore for prevent the water under high pressure that stator exports from entering impeller inlet by conduit, it is necessary to installing a valve on conduit 3, this valve is just opened under low flow rate condition.
Further, pump shaft is hollow with impeller and diffuser coupling part, and opens two holes on the pump shaft of diffuser flange and vane inlet correspondence position respectively, and the water under high pressure exported by stator by hole is flowed into shaft hollow section and enters back into stator entrance.
Further, having 1 hole near each stator back side inlet side wheel hub, water pump shaft hollow section flowed out by this some holes introduces vane inlet place, to reduce the adverse pressure gradient of stator back side import department, the generation suppressing backflow reduces flow losses, thus improving pump performance.
Claims (10)
1. improve a device for diagonal pumps internal flow stability, mainly include seal washer (3), nut (4), conduit (6), valve (11), flange (8), bolt (9), inducer (18), circular outer cylinder (20), runner boss (23), blade (22), diffuser (25), the device such as pump shaft (28) composition；It is characterized in that, described circular outer cylinder (20) impeller inlet and stator export and are uniform-distribution with 8 screwed holes on correspondence position circumferencial direction；Described circular outer cylinder (20) and conduit (6) are to be attached by screw thread, then tighten with nut (4) conduit (6) one gasket seal (3) of upper installation for preventing the liquid leakage in runner envelope from needing again；Fix between described conduit (6) with conduit (6) and be connected；Will not there is stall in impeller under design conditions, therefore the liquid that stator exports need not be led into impeller inlet wheel rim, and at conduit (6) one valve of upper installation, this valve is only just opened under low flow rate condition；Described pump shaft (28) first half section adopts hollow, and on the pump shaft of diffuser flange and vane inlet correspondence position, open two holes respectively, stator back side inlet side wheel hub also has 5 holes simultaneously, thus the water under high pressure in stator exit is introduced vane inlet place by pump shaft hollow section.
2. a kind of device improving diagonal pumps internal flow stability according to claim 1, it is characterized in that, circular outer cylinder (20) circumferencial direction is uniform-distribution with screwed hole of the same size, and the angle of screwed hole centrage and coordinate axes is 45 degree.
3. a kind of device improving diagonal pumps internal flow stability according to claim 1 and 2 and structure, it is characterised in that the screwed hole on circular outer cylinder (20) is positioned at the position corresponding to impeller inlet and stator outlet.
4. a kind of device improving diagonal pumps internal flow stability according to claim 1, it is characterized in that, by conduit (6), the screwed hole that circular outer cylinder impeller inlet and stator export correspondence position is attached, when diagonal pumps operate under low flow rate condition, vacuum side of blade is susceptible to backflow, stall and then forms low-pressure area, the water under high pressure that stator exports can be incorporated into impeller inlet wheel rim place by conduit；Thus reducing the adverse pressure gradient in this region and reducing backflow generation, thus improving the flow regime of fluid in impeller, improve pump performance, it is suppressed that the appearance in " hump " district.
5. a kind of device improving diagonal pumps internal flow stability according to claim 3, it is characterized in that, by conduit (6), the screwed hole that circular outer cylinder impeller inlet and stator export correspondence position is attached, when diagonal pumps operate under low flow rate condition, vacuum side of blade is susceptible to backflow, stall and then forms low-pressure area, the water under high pressure that stator exports can be incorporated into impeller inlet wheel rim place by conduit；Thus reducing the adverse pressure gradient in this region and reducing backflow generation, thus improving the flow regime of fluid in impeller, improve pump performance, it is suppressed that the appearance in " hump " district.
6. a kind of device improving diagonal pumps internal flow stability according to claim 1 or 4, it is characterized in that, being provided with a valve (11) on conduit (6), the hole at impeller inlet place is connected and by called after conduit of conduit 1,2,3,4 by the conduit consistent by 4 size thicknesses with the hole in stator exit；It is connected respectively through flange and bolt between conduit with conduit；Under design discharge operating mode will not there is stall in impeller inlet wheel rim place, therefore for prevent the water under high pressure that stator exports from entering impeller inlet by conduit, it is necessary to installing a valve on conduit 3, this valve is just opened under low flow rate condition.
7. a kind of device improving diagonal pumps internal flow stability according to claim 3, it is characterized in that, being provided with a valve (11) on conduit (6), the hole at impeller inlet place is connected and by called after conduit of conduit 1,2,3,4 by the conduit consistent by 4 size thicknesses with the hole in stator exit；It is connected respectively through flange and bolt between conduit with conduit；Under design discharge operating mode will not there is stall in impeller inlet wheel rim place, therefore for prevent the water under high pressure that stator exports from entering impeller inlet by conduit, it is necessary to installing a valve on conduit 3, this valve is just opened under low flow rate condition.
8. a kind of device improving diagonal pumps internal flow stability according to claim 1 or 4, it is characterized in that, pump shaft is hollow with impeller and diffuser coupling part, and opening two holes on the pump shaft of diffuser flange and vane inlet correspondence position respectively, the water under high pressure exported by stator by hole is flowed into shaft hollow section and enters back into stator entrance.
9. a kind of device improving diagonal pumps internal flow stability according to claim 1 or 4, it is characterized in that, 1 hole is being had near each stator back side inlet side wheel hub, water pump shaft hollow section flowed out by this some holes introduces vane inlet place, to reduce the adverse pressure gradient of stator back side import department, the generation suppressing backflow reduces flow losses, thus improving pump performance.
10. a kind of device improving diagonal pumps internal flow stability according to claim 8, it is characterized in that, 1 hole is being had near each stator back side inlet side wheel hub, water pump shaft hollow section flowed out by this some holes introduces vane inlet place, to reduce the adverse pressure gradient of stator back side import department, the generation suppressing backflow reduces flow losses, thus improving pump performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610049529.1A CN105805046A (en) | 2016-01-25 | 2016-01-25 | Device for improving internal flow stability of diagonal flow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610049529.1A CN105805046A (en) | 2016-01-25 | 2016-01-25 | Device for improving internal flow stability of diagonal flow pump |
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| Publication Number | Publication Date |
|---|---|
| CN105805046A true CN105805046A (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610049529.1A Pending CN105805046A (en) | 2016-01-25 | 2016-01-25 | Device for improving internal flow stability of diagonal flow pump |
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| Country | Link |
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| CN (1) | CN105805046A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321465A (en) * | 2016-08-22 | 2017-01-11 | 江苏大学 | Kinetics characterization method for rotating stall of centrifugal pump impeller |
| CN108223396A (en) * | 2017-12-11 | 2018-06-29 | 中国水利水电科学研究院 | A kind of high-precision water pump bath scaled model experimental device |
| CN116484769A (en) * | 2023-05-29 | 2023-07-25 | 江南阀门有限公司 | Fluid dynamic analysis method and system for ultra-large caliber axial flow check butterfly valve |
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| JPH09222090A (en) * | 1996-02-19 | 1997-08-26 | Kubota Corp | Advance waiting operation pump |
| JP2001107898A (en) * | 1999-10-12 | 2001-04-17 | Hitachi Ltd | Mixed flow pump |
| CN103321911A (en) * | 2013-05-03 | 2013-09-25 | 江苏大学 | Pull-rod modularized guide vane type diagonal flow pump |
| CN103527521A (en) * | 2013-09-30 | 2014-01-22 | 华中科技大学 | Water jet propulsion pump |
| CN103883563A (en) * | 2012-12-24 | 2014-06-25 | 管兵 | Modified magnetic force driving pump |
-
2016
- 2016-01-25 CN CN201610049529.1A patent/CN105805046A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09222090A (en) * | 1996-02-19 | 1997-08-26 | Kubota Corp | Advance waiting operation pump |
| JP2001107898A (en) * | 1999-10-12 | 2001-04-17 | Hitachi Ltd | Mixed flow pump |
| CN103883563A (en) * | 2012-12-24 | 2014-06-25 | 管兵 | Modified magnetic force driving pump |
| CN103321911A (en) * | 2013-05-03 | 2013-09-25 | 江苏大学 | Pull-rod modularized guide vane type diagonal flow pump |
| CN103527521A (en) * | 2013-09-30 | 2014-01-22 | 华中科技大学 | Water jet propulsion pump |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321465A (en) * | 2016-08-22 | 2017-01-11 | 江苏大学 | Kinetics characterization method for rotating stall of centrifugal pump impeller |
| CN108223396A (en) * | 2017-12-11 | 2018-06-29 | 中国水利水电科学研究院 | A kind of high-precision water pump bath scaled model experimental device |
| CN108223396B (en) * | 2017-12-11 | 2024-04-26 | 中国水利水电科学研究院 | High-precision water pump model experimental device |
| CN116484769A (en) * | 2023-05-29 | 2023-07-25 | 江南阀门有限公司 | Fluid dynamic analysis method and system for ultra-large caliber axial flow check butterfly valve |
| CN116484769B (en) * | 2023-05-29 | 2023-10-10 | 江南阀门有限公司 | Fluid dynamic analysis method and system for ultra-large caliber axial flow check butterfly valve |
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Application publication date: 20160727 |