CN101881284A - Axial flow pump guide vane body with high specific speed - Google Patents
Axial flow pump guide vane body with high specific speed Download PDFInfo
- Publication number
- CN101881284A CN101881284A CN2009102643620A CN200910264362A CN101881284A CN 101881284 A CN101881284 A CN 101881284A CN 2009102643620 A CN2009102643620 A CN 2009102643620A CN 200910264362 A CN200910264362 A CN 200910264362A CN 101881284 A CN101881284 A CN 101881284A
- Authority
- CN
- China
- Prior art keywords
- guide vane
- vane body
- pump
- specific speed
- flow pump
- 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 an axial flow pump guide vane body with high specific speed, overcoming the deficiencies that the traditional axial flow pump guide vane body with high specific speed has larger hydraulic loss, resulting in lower efficiency of a water pump. In the invention, a diffusion angle of a conical tube of the guide vane body is enlarged to enable a single-edge diffusion angle thereof to be ranged from 6 degrees to 10 degrees; because the diffusion degree of the guide vane body is increased, the flow rate is lowered on the basis of ensuring not to cause side wall flow separation, thereby efficiently lowering the hydraulic loss of the guide vane body and enhancing the efficiency of the pump; and also because the diffusion angle of the guide vane body is enlarged and the outlet diameter is increased, a flowing space of a latter water outlet channel is also increased, the hydraulic loss of the water outlet channel is lowered, and the pump device efficiency is further improved.
Description
Technical field:
The present invention relates to a kind of high specific speed axial-flow pump rear guide vane body, belong to the hydraulic machinery field.
Background technique:
Stator is important composition parts in the axial-flow pump, and liquid stream has certain outlet vortex energy after flowing out axial-flow pump impeller, account for 6%~20% (specific speed n of total energy
s=1600~500).If the liquid that rotates directly enters penstock, the kinetic energy of rotation will total loss fall in pipeline.The effect of axial-flow pump stator is exactly that most of vortex with the impeller outlet place can convert the pressure energy effectively to, and therefore, diffuser has bigger influence to the axial-flow pump performance.
Water pump specific speed n
sRepresentation is:
In the formula, n is a rotating speed; Q is a flow; H is a lift.
The equation of the actual lift H of axial-flow pump is:
In the formula, D is an impeller diameter; η
hBe hydraulic efficiency; V
U1, V
U2Be respectively impeller and import and export absolute velocity component along the circumferential direction in the velocity triangle, usually V
U1=0; G is a gravity accleration; π is a Ratio of the circumference of a circle to its diameter.
Know that by formula (1) and formula (2) Q is certain when flow, rotation speed n is certain, and impeller inlet does not have prewhirls, and changes when little specific speed n in hydraulic efficiency
sHigh more, then lift H is low more, means V
2uMore little, the callable energy of stator is more little.
A large amount of hydraulic model test digital proofs, the contrast rotation speed n
sAxial-flow pump about=900~1000, stator accounts for 10% of stagnation pressure greatly with the ability that rotation function is converted into the pressure energy.Along with specific speed increases, this ability of stator will continue to descend.
And stator also can bring corresponding hydraulic loss in recovered energy, and as the vane inlet impact loss, shape loss and wake flow mix and ooze loss etc.Higher specific speed axial flow lift of pump is low relatively, then its V
2uAlso little, stator reclaims can be relatively also little, but the various losses that stator brings are then constant substantially, may cause like this installing that the total efficiency of water pump can not get effectively improving even also may descending behind the stator.Contrast existing outstanding hydraulic model of axial-flow pump parameter at present can be found, at specific speed n
sSurpass after 1000, its efficient begins remarkable reduction, mainly be because the lift that diffuser lost accounts for the ratio of total head to be increased, and the recoverable energy of stator institute is due to the reason of minimizing.
At present, China's axial-flow pump impeller has reached higher design level, as the patent No. be: " axial flow pump impeller vane " of ZL02133456.0, but ubiquity is to the not enough problem of diffuser research, particularly the axial-flow pump diffuser to high specific speed still designs according to the diffuser design method of low specific speed, causes the axial-flow pump efficient of the high specific speed of low lift on the low side.
Summary of the invention:
In order to overcome existing axial flow pump guide vane body with high specific speed hydraulic loss large percentage, deficiency that pump efficiency is lower, the invention provides a kind of Optimization Design of axial flow pump guide vane body with high specific speed, can effectively reduce the hydraulic loss of diffuser, the efficient of elevator pump and pump-unit.
Along with the raising of axial-flow pump specific speed, the absolute velocity of impeller outlet fluid is reducing at the component of circumferencial direction, so the guide vane import laying angle α of diffuser
3Increasing.The angle of flare ε of runner can be definite by following formula between a certain cylindrical stream surface adjacent blades in the diffuser:
In the formula, l/t is a cascade solidity.
By formula (3) as can be known, along with α
3Increase, ε is reducing.Specific speed reaches after 1000, and ε mean value only is 2 °~3 °.At present, when designing, gets diffuser center angle of flare θ≤(6 °~10 °) (see " modern pump technical manual ", Guan Xingfan writes, Yuhang Publishing House, 1995) of conic diffuse, and common owing to be subjected to diffuser outlet diameter D when actual design
4Get the restriction of standard pipe size, θ probably gets about 6 ° usually, does not make full use of diffusion space.And the minimum value of the resistance coefficient of taper increaser is in fact in the scope of θ=4 °~12 °, in order to make full use of diffusion space, and desirable here big value.
And the equivalent angle of flare of tackling the runner between adjacent two guide vanes when determining the diffusance of diffuser is adjusted.Because the diffuser of high specific speed axial-flow pump is less at the angle of flare ε between the adjacent guide vane sheet on the same stream interface, one side not diffusion again in hub side, to answer this in order fully spreading, can be provided with the angle of flare of the single face in the outside as the center angle of flare.
A kind of axial flow pump guide vane body with high specific speed of the present invention is characterized in that strengthening the angle of flare θ of diffuser conical pipe, makes its conventional Δ θ that increases, and its monolateral angle of flare is satisfied
The invention has the beneficial effects as follows, because the increase of diffuser diffusance, reduced flow velocity guaranteeing not cause on the basis of the limit wall separation of flow, because square being directly proportional of hydraulic loss and flow velocity, so can effectively reduce the hydraulic loss of diffuser, the efficient of raising pump; The axial-flow pump of high specific speed is usually used in large-scale low lift pumping plant simultaneously, the outlet diameter of diffuser does not need to be subjected to the restriction of standard pipe size, outlet connects the outlet passage with diffuser usually, because the increasing and the outlet diameter of diffuser diffusion angle increase, make the fluid space of crossing of the outlet passage of back also obtain increase, reduced the hydraulic loss of outlet passage, pump assembly efficiency is further improved.
Description of drawings:
Fig. 1 is an axial-flow pump diffuser cross-sectional view;
Fig. 2 is molded lines on the cylindrical stream surface of R at radius for the diffuser blade;
Fig. 3 is the vertical-type axial-flow pump apparatus structure schematic representation of elbow water inlet, straighttube-type water outlet, and top (1) is sectional drawing, and bottom (2) are planimetric map;
Fig. 4 is the vertical-type axial-flow pump apparatus structure schematic representation of elbow water inlet, hydrocone type water outlet, and top (1) is sectional drawing, and bottom (2) are planimetric map;
1 is outlet passage among the figure, the 2nd, and diffuser, the 3rd, impeller, the 4th, water inlet flow channel;
Dotted portion is represented the molded lines after the diffuser conical pipe strengthens the diffusion angle among the figure.
Embodiment:
The present invention is further described below in conjunction with accompanying drawing.
Claims (1)
1. axial flow pump guide vane body with high specific speed, it is characterized in that: strengthened the angle of flare of diffuser conical pipe, making its monolateral angle of flare is 6 °~10 °, can enlarge the fluid space of crossing of diffuser and subsequent segment outlet passage, reduce flow velocity, the efficient of elevator pump and pump-unit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009102643620A CN101881284A (en) | 2009-12-21 | 2009-12-21 | Axial flow pump guide vane body with high specific speed |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009102643620A CN101881284A (en) | 2009-12-21 | 2009-12-21 | Axial flow pump guide vane body with high specific speed |
Publications (1)
Publication Number | Publication Date |
---|---|
CN101881284A true CN101881284A (en) | 2010-11-10 |
Family
ID=43053380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2009102643620A Pending CN101881284A (en) | 2009-12-21 | 2009-12-21 | Axial flow pump guide vane body with high specific speed |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN101881284A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102758778A (en) * | 2012-07-30 | 2012-10-31 | 宁波巨神制泵实业有限公司 | Core-pulling type submersible pump and mounting method thereof |
CN103557185A (en) * | 2013-10-31 | 2014-02-05 | 江苏国泉泵业制造有限公司 | Axial pump vane airfoil optimizing design method |
CN103696983A (en) * | 2013-12-31 | 2014-04-02 | 江苏大学 | Method for optimally designing impellers of bidirectional axial flow pumps |
CN104011394A (en) * | 2011-12-13 | 2014-08-27 | 赛乐姆知识产权控股有限责任公司 | Propeller pump and pump station |
CN107299916A (en) * | 2016-12-15 | 2017-10-27 | 江苏国泉泵业制造有限公司 | Submersible sewage pump with fuisw rib in a kind of bend pipe base |
CN107762965A (en) * | 2017-09-19 | 2018-03-06 | 河海大学 | A kind of axial-flow pump of high-lift low noise |
CN109989923A (en) * | 2019-05-15 | 2019-07-09 | 扬州大学 | A kind of new and effective axial-flow pump device based on rotating rear guide vane body |
CN114396393A (en) * | 2021-11-08 | 2022-04-26 | 江苏大学 | Bulb tubular pump guide vane self-adaptive design method and bulb tubular pump guide vane |
-
2009
- 2009-12-21 CN CN2009102643620A patent/CN101881284A/en active Pending
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104011394A (en) * | 2011-12-13 | 2014-08-27 | 赛乐姆知识产权控股有限责任公司 | Propeller pump and pump station |
CN104011394B (en) * | 2011-12-13 | 2016-08-24 | 赛乐姆知识产权控股有限责任公司 | Propeller pump and pumping plant |
CN102758778A (en) * | 2012-07-30 | 2012-10-31 | 宁波巨神制泵实业有限公司 | Core-pulling type submersible pump and mounting method thereof |
CN103557185A (en) * | 2013-10-31 | 2014-02-05 | 江苏国泉泵业制造有限公司 | Axial pump vane airfoil optimizing design method |
CN103557185B (en) * | 2013-10-31 | 2016-01-20 | 江苏国泉泵业制造有限公司 | A kind of axial pump vane Airfoil Optimization method |
CN103696983A (en) * | 2013-12-31 | 2014-04-02 | 江苏大学 | Method for optimally designing impellers of bidirectional axial flow pumps |
CN103696983B (en) * | 2013-12-31 | 2017-03-01 | 江苏大学 | A kind of Double-way axial flow impeller of pump Optimization Design |
CN107299916A (en) * | 2016-12-15 | 2017-10-27 | 江苏国泉泵业制造有限公司 | Submersible sewage pump with fuisw rib in a kind of bend pipe base |
CN107762965A (en) * | 2017-09-19 | 2018-03-06 | 河海大学 | A kind of axial-flow pump of high-lift low noise |
CN107762965B (en) * | 2017-09-19 | 2019-03-01 | 河海大学 | A kind of axial-flow pump of high lift low noise |
CN109989923A (en) * | 2019-05-15 | 2019-07-09 | 扬州大学 | A kind of new and effective axial-flow pump device based on rotating rear guide vane body |
CN114396393A (en) * | 2021-11-08 | 2022-04-26 | 江苏大学 | Bulb tubular pump guide vane self-adaptive design method and bulb tubular pump guide vane |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101881284A (en) | Axial flow pump guide vane body with high specific speed | |
WO2023077648A1 (en) | Self-adaptive design method for bulb tubular pump guide vane, and bulb tubular pump guide vane | |
CN105332945B (en) | A kind of Centrifugal Fan Impeller of adjustable splitterr vanes | |
CN101089403A (en) | BJL multi-channel modified line special air conditioner energy-saving centrifugal pump | |
CN108223425A (en) | A kind of high lift Bulb unit tubular pump | |
CN207647673U (en) | A kind of tubular turbine | |
CN201636087U (en) | High-specific speed axial-flow pump guide vane | |
CN111594369A (en) | Mixed-flow water turbine with double-inlet volute suitable for cooling tower | |
CN103912434B (en) | A kind of small power station's axial flow water turbine equipment | |
CN204663967U (en) | The multistage centrifugal pump impeller that a kind of and radial stator mates | |
CN103615392B (en) | A kind of uniform pitch pulp pump and impeller Hydraulic Design Method thereof | |
CN105090048B (en) | Micro- head flow velocity type turbine pump | |
CN111535974A (en) | Low-water-head large-flow mixed-flow water turbine with double-inlet volute | |
CN205714923U (en) | A kind of diagonal pumps | |
CN111535973A (en) | Low specific speed double-inlet volute mixed-flow water turbine suitable for cooling tower | |
CN203321859U (en) | Low-lift bidirectional vertical shaft tubular pump device | |
CN208578778U (en) | A kind of spatial guide blade | |
CN110578706A (en) | Super-separation type impeller of spiral axial-flow oil-gas mixed transportation pump | |
CN204921479U (en) | Pump case of immersible pump for well | |
CN108730227A (en) | A kind of ultralow lifting pump blade and reversible axial flow pump | |
CN204783814U (en) | High -efficient tubing pump of low specific speed | |
CN106499669B (en) | Using the water pump of flexible guide vane | |
CN203627241U (en) | Uniform pitch pulp pump | |
CN202900790U (en) | Centrifugal water pump | |
CN219639069U (en) | Axial flow pump beneficial to water flow diffusion |
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 |
Open date: 20101110 |