CN105650025A - Centrifugal pump impeller - Google Patents
Centrifugal pump impeller Download PDFInfo
- Publication number
- CN105650025A CN105650025A CN201610013096.4A CN201610013096A CN105650025A CN 105650025 A CN105650025 A CN 105650025A CN 201610013096 A CN201610013096 A CN 201610013096A CN 105650025 A CN105650025 A CN 105650025A
- Authority
- CN
- China
- Prior art keywords
- impeller
- centrifugal pump
- cover plate
- liquid
- fluid orifice
- 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
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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
- F04D29/2255—Special flow patterns flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of centrifugal pumps and provides a centrifugal pump impeller in order to solve the problems that through an existing method for improving the cavitation performance of a centrifugal pump, the structure of the centrifugal pump is more complex, and the cost is relatively high. The centrifugal pump impeller comprises an impeller front cover plate, an impeller rear cover plate and a plurality of blades; a plurality of jet flow holes are formed in the impeller front cover plate, are located near inlets of the blades, and extend along the intersection lines of the back surfaces of the blades and the impeller front cover plate; and the jet flow holes are oval holes, the width of the jet flow holes is 2-3 mm, and the length of the jet flow holes is 1/3-1/2 the width of inlet sides of the blades. According to the centrifugal pump impeller, the pressure of liquid at the lowest pressure point is increased, the situation that gas dissolved in the liquid escapes and forms a large quantity of bubbles is avoided, the flow performance of the liquid at the inlets of the centrifugal pump impeller is improved, and the cavitation performance of the centrifugal pump is improved; and meanwhile, the structure is simplified, and the cost is reduced.
Description
Technical field
The invention belongs to the technical field of impeller pump, it is specifically related to a kind of centrifugal pump impeller.
Background technology
Cavitation is a kind of easy generation and very harmful phenomenon in fluid machinery (such as impeller pump), the formation of cavitation phenomenon is mainly owing to centrifugal pump impeller ingress liquid pressure is lower, dissolve the effusion of gas in a liquid, form a large amount of bubble, bubble flows together with liquid, and centrifugal pump impeller is to the liquid acting flowed into, and liquid energy increases gradually, pressure raises gradually, and bubble can occur cohesion to break under the pressure that surrounding is higher. The harm of cavitation phenomenon mainly contains: one, and a large amount of bubble can block runner, makes impeller pump find time and stop, and causes efficiency and the flow-reduction of impeller pump; Two, breaking of bubble also can produce noise and vibration; Three, when bubble generation cohesion is broken, liquid is formed hole, surrounding liquid is brought to hole with flank speed, forms local hydraulic and impacts, and this water impact can cause impeller surface degrade and be oxidized, impeller is damaged, shortening the work-ing life of impeller pump, therefore we should avoid the generation of cavitation phenomenon as far as possible, it is to increase the cavitation performance of fluid machinery.
The method improving impeller pump cavitation performance at present mainly arranges drainage device between outlet of centrifugal pump and centrifugal pump inlet, by this drainage device, the highly pressurised liquid that outlet of centrifugal pump flows out is drained to centrifugal pump inlet, to improve the liquid pressure at centrifugal pump inlet place, thus avoid the gas effusion dissolved in a liquid to form a large amount of bubble generation cavitation phenomenon, improve impeller pump cavitation performance, but aforesaid method needs to increase drainage device on impeller pump, causing centrifugal pump structure more complicated, cost is higher.
Summary of the invention
The method improving impeller pump cavitation performance at present to solve causes centrifugal pump structure more complicated, the problem that cost is higher, and the present invention proposes a kind of centrifugal pump impeller, to improve the cavitation performance of impeller pump under the prerequisite of parts not increasing impeller pump.
Centrifugal pump impeller of the present invention comprises before impeller cover plate and some blades after cover plate, impeller, cover plate is provided with before described impeller some fluid orifices, this fluid orifice is positioned at before described impeller on cover plate near the position of the import of described blade, and this fluid orifice is along the friendship line extension of cover plate before the back side and described impeller of described blade.
Wherein, described fluid orifice is Long Circle hole.
Wherein, the width of described fluid orifice is 2-3mm, and the length of described fluid orifice is the 1/3-1/2 of the inlet side width of described blade.
Wherein, the quantity of described fluid orifice is equal with the quantity of described blade.
Wherein, the quantity of described fluid orifice is less than the quantity of described blade.
The invention allows for a kind of impeller pump, comprise any one centrifugal pump impeller above-mentioned.
Centrifugal pump impeller of the present invention has following useful effect:
Highly pressurised liquid in front pump chamber can be caused the region of import back side cover plate before impeller of blade by the fluid orifice of centrifugal pump impeller of the present invention, i.e. minimal pressure point, such high pressure liquid knows from experience the energy increasing minimal pressure point place liquid, increase the pressure of minimal pressure point place liquid, the dynamic pressure of minimal pressure point is made to fall reduction, thus avoid the gas effusion dissolved in a liquid and form a large amount of bubble and cavitation phenomenon occurs, improve the flowing of centrifugal pump impeller import liquid, it is to increase the cavitation performance of impeller pump. The application of the invention centrifugal pump impeller, the cavitation performance of impeller pump can be improved, and centrifugal pump impeller of the present invention offers fluid orifice formation on existing centrifugal pump impeller, the parts of existing centrifugal pump impeller are not made to increase, do not make the parts of impeller pump increase, rely on the flowing of impeller pump internal liquid to improve the cavitation performance of impeller pump, compared with the method for the raising impeller pump cavitation performance introduced in background technology yet, simplify the structure, reduce cost.
Accompanying drawing explanation
Fig. 1 is the cross-sectional schematic of centrifugal pump impeller of the present invention;
Fig. 2 is the schematic perspective view of centrifugal pump impeller of the present invention;
Fig. 3 is the structural representation of the fluid orifice of centrifugal pump impeller of the present invention.
Embodiment
The technical scheme of the present invention is introduced below in conjunction with accompanying drawing.
As shown in Figure 1-2, centrifugal pump impeller of the present invention comprises before impeller cover plate 11 and some blades 12 after cover plate 10, impeller, one end of blade 12 is fixed on before impeller on cover plate 10, and blade 12 be fixed on impeller before one end on cover plate 10 be the import 121 of blade 12, liquid enters centrifugal pump impeller from the import 121 of blade 12, centrifugal pump impeller is to the liquid acting flowed into, and is thrown away between cover plate 11 from cover plate 10 before impeller with after impeller by liquid. Being provided with some fluid orifices 14 before impeller on cover plate 10, this fluid orifice 14 is positioned at before impeller on cover plate 10 near the position of the import 121 of blade 12, and this fluid orifice 14 extends along the friendship line of cover plate 10 before the back side 122 and the impeller of blade 12.
The quantity of fluid orifice 14 can be equal with the quantity of blade 12, namely the position of import 121 near each blade 12 is provided with fluid orifice 14 on cover plate 10 before the impeller, and this fluid orifice 14 extends along the friendship line of cover plate 10 before the back side 122 and the impeller of this blade 12. The quantity of fluid orifice 14 can also be less than the quantity of blade 12, namely the position of import 121 near certain a few blade 12 is provided with fluid orifice 14 on cover plate 10 before the impeller, and this fluid orifice 14 extends along the friendship line of cover plate 10 before the back side 122 and the impeller of this blade 12.
As shown in Figure 3, fluid orifice 14 is Long Circle hole, and the middle part being also exactly fluid orifice 14 is rectangle, and the both sides of this rectangle are semicircle, and the length A of fluid orifice 14 is the 1/3-1/2 of the inlet side D width of blade 12, and the width B of fluid orifice 14 is 2-3mm.
As shown in Figure 1-2, in centrifugal pump impeller use procedure of the present invention, liquid flows into centrifugal pump impeller from the import 121 of blade 12, liquid is done work by blade 12, liquid energy increases gradually, and pressure increases gradually, and liquid is thrown away by last blade 12 from centrifugal pump impeller outlet.Owing to liquid is done work by blade 12, so exporting, from centrifugal pump impeller, the liquid thrown away is highly pressurised liquid, this highly pressurised liquid major part can be discharged from outlet of centrifugal pump, and a part can leak to front pump chamber 15 in addition, and this front pump chamber 15 is space between cover plate 10 and the pump housing 1 before impeller. owing to front pump chamber 15 is connected by fluid orifice 14 with the import of blade 12, so the highly pressurised liquid in front pump chamber 15 can be caused the region of import back side cover plate 10 before impeller of blade 12 by fluid orifice 14, this region is minimal pressure point, because liquid had a pressure drop before this at the back side of blade 12 after entering centrifugal pump impeller, then pressure rises again gradually, minimal pressure point appears at the position near the import back side of blade 12, again owing to the liquid circumferential speed near cover plate before impeller 10 is bigger, the pressure drop produced is big, therefore the region of import back side cover plate 10 before impeller of blade 12 is minimal pressure point, the pressure of this minimal pressure point is low, dissolve gas in a liquid be easy to the effusion a large amount of bubble of formation and then cavitation phenomenon occurs, it it is the region that cavitation occurs at first. by fluid orifice 14, the highly pressurised liquid in front pump chamber 15 is caused minimal pressure point, such high pressure liquid knows from experience the energy increasing minimal pressure point place liquid, increase the pressure of minimal pressure point place liquid, the dynamic pressure of minimal pressure point is made to fall reduction, thus avoid the gas effusion dissolved in a liquid and form a large amount of bubble and cavitation phenomenon occurs, improve the flowing of centrifugal pump impeller import liquid, it is to increase the cavitation performance of impeller pump.
Wherein, fluid orifice 14 is Long Circle hole, and the both sides of this fluid orifice 14 are semicircle, and such highly pressurised liquid is more smooth and easy by flowing during fluid orifice. Owing to the width of fluid orifice 14 is 2-3mm, width is less, known from experience by the high pressure liquid of fluid orifice 14 and form gap jet, the liquid mixing at such highly pressurised liquid and pressure lower-most point place is more abundant, be conducive to the transmission ofenergy between the liquid at highly pressurised liquid and pressure lower-most point place, thus be conducive to increasing the pressure of pressure lower-most point place liquid, it is to increase the cavitation performance of impeller pump.
Highly pressurised liquid is caused minimal pressure point place by the fluid orifice 14 of the present invention, add the pressure of minimal pressure point place liquid, substantially increase the cavitation performance of impeller pump like this, centrifugal pump impeller of the present invention is specially adapted to the occasion that cavitation performance requirement is higher, it is possible to for carrying the many kinds of liquid body mediums such as clear water, corrosive liquid, high temperature or cryogenic liquid.
Present invention also offers a kind of impeller pump, this impeller pump comprises above-mentioned centrifugal pump impeller, and the installation position of this centrifugal pump impeller is identical with the installation position of existing centrifugal pump impeller.
Claims (6)
1. a centrifugal pump impeller, comprise before impeller cover plate and some blades after cover plate, impeller, it is characterized in that, cover plate is provided with before described impeller some fluid orifices, this fluid orifice is positioned at before described impeller on cover plate near the position of the import of described blade, and this fluid orifice is along the friendship line extension of cover plate before the back side and described impeller of described blade.
2. centrifugal pump impeller according to claim 1, it is characterised in that, described fluid orifice is Long Circle hole.
3. centrifugal pump impeller according to claim 2, it is characterised in that, the width of described fluid orifice is 2-3mm, and the length of described fluid orifice is the 1/3-1/2 of the inlet side width of described blade.
4. centrifugal pump impeller according to any one of claim 1-3, it is characterised in that, the quantity of described fluid orifice is equal with the quantity of described blade.
5. centrifugal pump impeller according to any one of claim 1-3, it is characterised in that, the quantity of described fluid orifice is less than the quantity of described blade.
6. an impeller pump, it is characterised in that, comprise the centrifugal pump impeller according to any one of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610013096.4A CN105650025A (en) | 2016-01-08 | 2016-01-08 | Centrifugal pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610013096.4A CN105650025A (en) | 2016-01-08 | 2016-01-08 | Centrifugal pump impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105650025A true CN105650025A (en) | 2016-06-08 |
Family
ID=56484203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610013096.4A Pending CN105650025A (en) | 2016-01-08 | 2016-01-08 | Centrifugal pump impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105650025A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050732A (en) * | 2016-08-16 | 2016-10-26 | 台州锦霸工贸有限公司 | Impeller assembly |
| CN112648230A (en) * | 2020-10-30 | 2021-04-13 | 中国航发西安动力控制科技有限公司 | High-efficient anti cavitation centrifugal pump impeller |
| CN115247657A (en) * | 2021-12-27 | 2022-10-28 | 兰州理工大学 | Self-circulation jet anti-cavitation structure and centrifugal pump with anti-cavitation structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848796A (en) * | 1981-09-18 | 1983-03-22 | Hitachi Ltd | Centrifugal impeller |
| US5540550A (en) * | 1994-01-21 | 1996-07-30 | Nikkiso Co., Ltd. | Solid impeller for centrifugal pumps |
| CN203009310U (en) * | 2012-11-29 | 2013-06-19 | 上海凯士比泵有限公司 | Cavitation-resistant type vane pump |
-
2016
- 2016-01-08 CN CN201610013096.4A patent/CN105650025A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848796A (en) * | 1981-09-18 | 1983-03-22 | Hitachi Ltd | Centrifugal impeller |
| US5540550A (en) * | 1994-01-21 | 1996-07-30 | Nikkiso Co., Ltd. | Solid impeller for centrifugal pumps |
| CN203009310U (en) * | 2012-11-29 | 2013-06-19 | 上海凯士比泵有限公司 | Cavitation-resistant type vane pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050732A (en) * | 2016-08-16 | 2016-10-26 | 台州锦霸工贸有限公司 | Impeller assembly |
| CN112648230A (en) * | 2020-10-30 | 2021-04-13 | 中国航发西安动力控制科技有限公司 | High-efficient anti cavitation centrifugal pump impeller |
| CN115247657A (en) * | 2021-12-27 | 2022-10-28 | 兰州理工大学 | Self-circulation jet anti-cavitation structure and centrifugal pump with anti-cavitation structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105650025A (en) | Centrifugal pump impeller | |
| CN100451345C (en) | Centrifugal compressor having air removal jet box structure | |
| CN109253861B (en) | Water jet propeller hydrostatic test device and test method | |
| CN205243867U (en) | Vortex pump | |
| CN110159586A (en) | A kind of double-layer staggered blade impellers | |
| CN102713302B (en) | submersible pump stage | |
| CN201265550Y (en) | Centrifugal pump with ultra-low specific speed | |
| CN102052354A (en) | High-speed multiphase flow gas-dissolving pump | |
| CN101603541A (en) | Submerged Motor Pumps | |
| US20160327012A1 (en) | Aerating system for hydraulic turbine | |
| CN203892268U (en) | Single-stage pump structure capable of balancing axial force | |
| CN203009310U (en) | Cavitation-resistant type vane pump | |
| CN203670222U (en) | Full-lift self-priming pump | |
| CN104279181A (en) | Centrifugal pump impeller | |
| CN102927060B (en) | A kind of suction port improving cavitation performance of centrifugal pump | |
| CN112901332A (en) | Method for relieving cavitation erosion of diesel engine body | |
| CN207598589U (en) | Inhibit the centrifugal pump device of impeller blade cavitation | |
| CN210317888U (en) | Double-layer staggered blade type impeller | |
| CN105626581A (en) | Stress application centrifugal pump with pressurization hole | |
| CN110242612B (en) | Centrifugal impeller with splitter blades | |
| CN202883498U (en) | Suction inlet of improving centrifugal pump cavitation performances | |
| CN201599207U (en) | Rotary regulation-type pump inlet complementary energy device | |
| CN206397809U (en) | A kind of multistage blade centrifugal pump impeller | |
| CN210829737U (en) | Centrifugal pump capable of improving anti-cavitation capacity | |
| CN110750935A (en) | Impeller for inhibiting back cavitation of pump impeller blade and design method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160608 |
|
| RJ01 | Rejection of invention patent application after publication |