CN2103038U - Small flow supper low-rate revolution impeller - Google Patents
Small flow supper low-rate revolution impeller Download PDFInfo
- Publication number
- CN2103038U CN2103038U CN 91219794 CN91219794U CN2103038U CN 2103038 U CN2103038 U CN 2103038U CN 91219794 CN91219794 CN 91219794 CN 91219794 U CN91219794 U CN 91219794U CN 2103038 U CN2103038 U CN 2103038U
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- impeller
- small flow
- width
- low
- utility
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Abstract
The utility model provides a mew-type small flow super low-rate revolution impeller, which is suitable for a small flow low-rate revolution centrifugal pump. The utility model can be suitable for the situation which needs small flow and high delivery lift. Furthermore the utility model reduces the manufacture cost, increases the quality and level of product and saves energy. The mew-type small flow super low-rate revolution impeller is characterized in that short vanes are respectively distributed near the rear surfaces of long vanes. The inlet of the short vanes is at 0.8D (D2-the external diameter of the impeller), and the width b of the impeller is equal to the width of the outlet b2 of the impeller.
Description
The utility model is the impeller of using on a kind of centrifugal pump.
Centrifugal pump impeller now commonly used, (N wherein: revolution r/min when specific speed NS==50~1000; Q: flow m
3/ s; H: lift m), can carry out designing and calculating by common method.But when specific speed NS≤50, particularly NS≤30, flow Q≤5m
3During/h, it is very little that its exit width b2 becomes, and is difficult to casting.Conventional calculating impeller outlet width formula is as follows:
Get N=2900r/min
As Q≤5m
3/ h, NS≤30 o'clock, b2≤3mm
Q≤3.2m
3/ h, NS≤23 o'clock, b2≤2.5mm
Narrow like this exit width, manufacturing are very difficult, can increase reject rate greatly, perhaps cause the performance of impeller to be offset to large-capacity point, thereby can not get desirable Ultra-low Specific revolution centrifugal pump impeller.When needing above-mentioned small flow Ultra-low Specific revolution centrifugal pump in the past, often be forced to adopt big pump, make its in the small flow district, the operation of inefficient district, consume bigger power, cause energy waste.
The purpose of this utility model provides a kind of small flow Ultra-low Specific revolution impeller that has improved, and its advantage is: ultra-low specific speed NS≤30, exit width b2 〉=definite value, the little Q≤5m of flow
3/ h, the high η of efficient=30~35%, (JB/TQ467-86 one step single sucking chemical centrifugal pump quality grading A level product regulation η=23~29%) cavitation performance is good, NPSH=1.2m, performance characteristic does not have hump, manufacturing process performance good (seeing Fig. 1, Fig. 2).
The utility model is to realize like this, increased the exit width of impeller, b2 〉=definite value, improved technology capability, impeller adopts more blade, and deviated splitter vane distinguishingly distributes, and make short blade (2) import be arranged in 0.8D2 place (D2-impeller outer diameter), overcome effectively owing to strengthen the interior separation of flow of impeller that exit width b2 may bring simply, improved the efficient of pump, characteristic curve can not occurred moving disadvantageous hump phenomenon.According to velocity distribution in the Ultra-low Specific revolution impeller blade runner, short blade (2) is arranged near place, linear leaf (1) back side, make velocity distribution even, improved the hydraulic performance of impeller and delivery chamber, because the effect of squeezing of short blade (2) is constantly reduced to short blade (2) import front vane front relative velocity by impeller inlet, and the separation of flow, the vortex of fluid on the blade of generation, increase the hydraulic loss phenomenon and all can suppress, short blade (2) has also increased limited number of blade correction factor.
Blade has adopted and has waited circular arc straight blade shape, is convenient to processing, and design parameter is coincide with making easily, and designing requirement easily realizes, has reduced the variation of making the pump performance that reason brings.
Because above measure, improve lift of pump, and adopted impeller width b to equal impeller outlet width b2=constant (be approximately calculated value 2 times), Q≤5m is satisfied in measures such as appropriate design volute throat size
3/ h, NS=30 or the more more requirement of low specific speed of small flow.
Further specify it below in conjunction with embodiment.
Fig. 1. the pump performance plotted curve
Fig. 2. the cavitation performance plotted curve
Fig. 3 .a.b. blade wheel structure figure.
Among Fig. 3, impeller width b equals impeller outlet width b2=5mm, each 6 in long and short blade, and short blade (2) is distributed near linear leaf (1) back side, and short blade (2) import is at the 0.8D2 place, and blade is the circular arc equal thickness.Behind casting, the clear sand, insert the machine tooling such as grade through turnning and milling and make shape among the figure.
The utility model has the advantages that: for the small flow supper low-rate revolution centrifugal pump provides good hydraulic model, be widely used in chemical flow-process pump, canned motor pump, magnetic drive pump and other needs the occasion of low discharge high-lift centrifugal pump, be convenient to reduce production costs, improve the quality of products, level, energy savings.
Claims (1)
1, a kind of novel small flow Ultra-low Specific revolution impeller, include linear leaf (1) short-movie (2), it is characterized in that: short blade on the impeller (2) is arranged near linear leaf (1) back side, short blade (2) import is located at 0.8D2 (D2-impeller outer diameter), impeller width b equals impeller outlet width b2, its width is about constant, is 2 times of calculated value approximately.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 91219794 CN2103038U (en) | 1991-08-13 | 1991-08-13 | Small flow supper low-rate revolution impeller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 91219794 CN2103038U (en) | 1991-08-13 | 1991-08-13 | Small flow supper low-rate revolution impeller |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2103038U true CN2103038U (en) | 1992-04-29 |
Family
ID=4926998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 91219794 Granted CN2103038U (en) | 1991-08-13 | 1991-08-13 | Small flow supper low-rate revolution impeller |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2103038U (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101169138B (en) * | 2006-10-27 | 2010-05-12 | 西北工业大学 | Axial flow compressor stator blade arrangement style |
CN102182703A (en) * | 2011-05-09 | 2011-09-14 | 中国石油大学(华东) | Efficient non-plugging discontinuous impeller of vane pump |
CN102562651A (en) * | 2012-03-08 | 2012-07-11 | 江苏大学 | High-efficiency wind-powered centrifugal pump impeller |
CN101586579B (en) * | 2009-04-23 | 2012-12-05 | 李新桥 | Sludge pump impeller with splitter vanes |
CN104405678A (en) * | 2014-10-14 | 2015-03-11 | 江苏大学 | Centrifugal impeller with vaneless flow-splitting sheets |
-
1991
- 1991-08-13 CN CN 91219794 patent/CN2103038U/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101169138B (en) * | 2006-10-27 | 2010-05-12 | 西北工业大学 | Axial flow compressor stator blade arrangement style |
CN101586579B (en) * | 2009-04-23 | 2012-12-05 | 李新桥 | Sludge pump impeller with splitter vanes |
CN102182703A (en) * | 2011-05-09 | 2011-09-14 | 中国石油大学(华东) | Efficient non-plugging discontinuous impeller of vane pump |
CN102182703B (en) * | 2011-05-09 | 2015-12-09 | 中国石油大学(华东) | A kind of discontinuous impeller of vane pump without blocking |
CN102562651A (en) * | 2012-03-08 | 2012-07-11 | 江苏大学 | High-efficiency wind-powered centrifugal pump impeller |
CN104405678A (en) * | 2014-10-14 | 2015-03-11 | 江苏大学 | Centrifugal impeller with vaneless flow-splitting sheets |
CN104405678B (en) * | 2014-10-14 | 2018-02-27 | 江苏大学 | A kind of centrifugal impeller of band without leaf splitter |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |