CN1031474C - Axial-flow type high-speed paddle pump - Google Patents
Axial-flow type high-speed paddle pump Download PDFInfo
- Publication number
- CN1031474C CN1031474C CN 93111752 CN93111752A CN1031474C CN 1031474 C CN1031474 C CN 1031474C CN 93111752 CN93111752 CN 93111752 CN 93111752 A CN93111752 A CN 93111752A CN 1031474 C CN1031474 C CN 1031474C
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- blade
- impeller
- diameter
- chord length
- wing chord
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- Expired - Fee Related
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Abstract
The present invention relates to an axial flow type vane pump with high speed, which is a vane pump with high flow quantity for pumping water. The present invention mainly adopts the special designs with large impeller shell ratio of (0.45 to 0.6), large vane number (of 4 to 5), high vane cascade density of (0.96 to 1.10 of root part, and 0.76 to 0.82 of outer margin), and a special design of a water guide cone that (the diameter of the upper port of the water guide cone is 0.72 times to 0.84 times larger than that of the impeller shell, the diameter of a cone bottom is 0.2 times to 0.24 times larger than that of the impeller shell, and the curve radius of cone sides is 0.96 times to 1.12 times larger than that of the impeller shell). Thus, the linear velocity of the circumference of the outer margin of the impeller is 30 m/s, and the present invention has the obvious advantages of high cavitation erosion stability, long service life, and low vibration and noise of a machine set.
Description
The present invention is a kind of axial-flow type high-speed paddle pump of the usefulness of drawing water, and belongs to the technical field that vane pump is made.
In the series product of existing axial--flow blading pump, specific speed is 500～1000 meters m3/s, rev/min scope, cavitation phenomenons in various degree generally takes place, the impeller blade serious wear, efficient is low, when level of cavitation is very big, machine will produce violent vibration and noise, even can cause fault formula accident.Simultaneously, the operation period of this vane pump is shorter, and its life-span generally about 1400～2700 hours, just needs the replacing formula to overhaul, and the expense of therefore cause maintenance, upgrading is higher.To the large diameter impeller of some large pumping stations, because the drive motor number of poles increases, therefore cost an arm and a leg, what have is equipped with a series of Aided Machines such as gear reduction box, and the civil works of pump house enlarges, and pumping plant investment funds are increased greatly.
In the research of existing high speed rotodynamic pump, in the test of a small amount of model pump, high specific speed pump impeller wheel shell is between 0.25～0.35 than all, and blade is 2～3, impeller largest circumference speed is major obstacle less than 25 meter per seconds as cavitation damage in the pump running pump in kind.
Purpose of the present invention just provides a kind of long service life, the big and low axial-flow type high-speed paddle pump of pump cost of flow.
Axial-flow type high-speed paddle pump specific speed of the present invention is 1250～1600 scopes, mainly is made up of water guide cone (1), hub (2), water intake (3), blade (4), diffuser (5), pump seat (6), pump shaft (7), Discharging bent-tube (8).Main points of the present invention are that the impeller of pump adopts the structure of big hub ratio, its hub is than (d=di/dh, wherein di is an impeller outer diameter, dh is the hub external diameter) be 0.45～0.60, the quantity of impeller blade is 4～5, the cascade solidity of root of blade is 0.96～1.10, and the cascade solidity of vane end faces is 0.76～0.82.The profile of water guide cone (1) is a cone shape, the both sides of its axial section are that cone flank face (1-3) is a curve form, its radius of curvature is 0.96～1.12 times of hub diameter, the diameter of the upper end-hole (1-1) of water guide cone (1) is 0.72～0.84 times of hub diameter, and the diameter of awl bottom (1-2) is 0.20～0.24 times of hub diameter.Its pass each other of the length of blade wing chord (promptly the axle center with impeller is the length that the cutting end face of round cut-off blade gained is drawn at the center) is: with blade 5 five equilibriums, the blade wing chord length that is cut out is: the wing chord length L of blade outer rim end face along the radial direction of impeller
1The cascade solidity that equals blade outer rim end face multiply by the impeller outer circumferential length again divided by the number of blade; Second wing chord length L
2=0.95L
1Article three, wing chord length L
3=0.9L
2Article four, wing chord length L
4=0.9L
3Article five, wing chord length (being the wing chord length of root of blade end face) L
5=0.9L
4
Adopt its advantage of axial-flow type high-speed paddle pump of the present invention to be: owing to adopted with high cascade solidity of big hub and mutliblade unique design scheme, and the improvement of water guide cone and blade shape, make impeller outer edge peripheral velocity of the present invention reach 30 meter per seconds, and the flow passage component major part is a laminar condition, improved hydraulic stability, the negative pressure curve distribution of vacuum side of blade is even, thereby has the remarkable advantage of high cavitation stability and long service life.In addition, because the unique design of air-foil blade of the present invention has improved hydraulic characteristic, blade outer rim and a large amount of minimizing of blade wheel chamber's gap earial drainage loss the fluctuation pressure amplitude is reduced, and vibration and noise that unit is followed are slight.
Fig. 1 is the structural representation of axial-flow type high-speed paddle pump of the present invention.
Embodiment of the present invention are as follows:
With impeller diameter is that 1152 millimeters axial-flow type high-speed paddle pump is an example, and when rated lift is 4 meters, when flow was 6.4 cubes of meter per seconds, specific speed was 1600 rev/mins, and the hub ratio is 0.504, and rotating speed is 490 rev/mins, and the number of blade is 4, and the hub diameter is 581mm.Upper end-hole (1-1) diameter of water guide cone (1) is 478.4mm (is hub diameter 0.8 times), the diameter of awl bottom (1-2) is 131.56mm (is hub diameter 0.22 times), and the radius of curvature of cone flank face (1-3) is 581 (promptly the diameters with hub is identical).The cascade solidity of blade outer rim end face is 0.8, then the wing chord length L of blade outer rim end face
1=723mm, L
2=687mm, L
3=618mm, L
4=557mm, L
5=501mm.The laying angle of blade outer rim end face is 16 °, and the laying angle of root of blade end face is 35 °.Blade adopts ductile cast iron material, and casting heat treatment hardness HB is 204-247, and blade airfoil surface roughness R8 is the 25-50 micron, and other mechanical performance index does not have specific (special) requirements, to reduce cost.According to the above, just can be made into axial-flow type high-speed paddle pump of the present invention.
Claims (3)
1. an axial-flow type high-speed paddle pump is made up of water guide cone (1), hub (2), water intake (3), blade (4), diffuser (5), pump seat (6), pump shaft (7), Discharging bent-tube (8), the hub ratio that it is characterized in that impeller is 0.45～0.60, the quantity of impeller upper blade (4) is 4～5, the cascade solidity of root of blade is 0.96～1.10, and the cascade solidity of blade outer rim end face is 0.76～0.82.
2. axial-flow type high-speed paddle pump according to claim 1, the both sides that it is characterized in that the axial section of water guide cone (1) are that cone flank face (1-3) is a curve form, its radius of curvature is 0.96～1.12 times of hub diameter, the diameter of the upper end-hole (1-1) of water guide cone (1) is 0.72～0.84 times of hub diameter, and the diameter of awl bottom (1-2) is 0.20～0.24 times of hub diameter.
3. axial-flow type high-speed paddle pump according to claim 1 and 2 is characterized in that radial direction along impeller with blade 5 five equilibriums, and the blade wing chord length relation that is cut out is: the wing chord length L of blade outer rim end face
1The cascade solidity that equals blade outer rim end face multiply by the impeller outer circumferential length again divided by the number of blade; Second wing chord length L
2=0.95L
1Article three, wing chord length L
3=0.9L
2Article four, wing chord length L
4=0.9L
3Article five, wing chord length (being the wing chord length of root of blade end face) L
5=0.9L
4
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111752 CN1031474C (en) | 1993-09-23 | 1993-09-23 | Axial-flow type high-speed paddle pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111752 CN1031474C (en) | 1993-09-23 | 1993-09-23 | Axial-flow type high-speed paddle pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1085993A CN1085993A (en) | 1994-04-27 |
| CN1031474C true CN1031474C (en) | 1996-04-03 |
Family
ID=4989512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93111752 Expired - Fee Related CN1031474C (en) | 1993-09-23 | 1993-09-23 | Axial-flow type high-speed paddle pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031474C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011010671A1 (en) * | 2011-02-08 | 2012-08-09 | Continental Automotive Gmbh | oil pump |
| CN102200141A (en) * | 2011-06-02 | 2011-09-28 | 温州市天成密封件制造有限公司 | Energy-saving guide vane device for pump |
| CN102392831A (en) * | 2011-11-24 | 2012-03-28 | 中国农业大学 | Swept-curved blade for high-speed fuel oil axial-flow pump |
| CN104791292B (en) * | 2015-03-27 | 2017-11-17 | 江苏大学 | A kind of axial-flow pump impeller water guide cone |
| CN108223424B (en) * | 2017-11-30 | 2020-02-18 | 河海大学 | Vertical axial-flow pump section |
| CN112901502B (en) * | 2021-03-16 | 2021-11-26 | 兰州理工大学 | Method for setting mounting angle of inlet of spatial guide vane of axial flow pump |
-
1993
- 1993-09-23 CN CN 93111752 patent/CN1031474C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1085993A (en) | 1994-04-27 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |