CN103032370A - Efficient asymmetric guide blade body matched with annular pumping chamber - Google Patents
Efficient asymmetric guide blade body matched with annular pumping chamber Download PDFInfo
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- CN103032370A CN103032370A CN2013100019658A CN201310001965A CN103032370A CN 103032370 A CN103032370 A CN 103032370A CN 2013100019658 A CN2013100019658 A CN 2013100019658A CN 201310001965 A CN201310001965 A CN 201310001965A CN 103032370 A CN103032370 A CN 103032370A
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- blade
- pumping chamber
- diffuser
- annular pumping
- guide blade
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Abstract
The invention discloses an efficient asymmetric guide blade body matched with an annular pumping chamber. The guide blade body consists of blades (1) and a cover plate (2), wherein the guide blade body is installed between an impeller (3) and the annular pumping chamber (4); the blades (1) are fixed on the cover plate (2) and asymmetrically arranged in a circumferential direction; with a first blade as a starting point, in the rotating direction of the impeller, the included angle between the outlet edge of an adjacent blade and the outlet edge of a previous blade is theta, is related to the number of the blades, and is gradually increased from 2 degrees to 50 degrees; a sum of all the included angles is 3600 degrees; an optimal installing angle between a radius of the outlet edge of the first blade and an outlet central line of the annular pumping chamber is 0-150 degrees; inlet and outlet installing angles, wrap angles and other structural parameters of all the blades are the same; and the asymmetric structure is applicable to design of a cylindrical radial guide blade and a twisted spatial guide blade. The asymmetric guide blade body improves hydraulic matching performance of the impeller and the pumping chamber, thus improving the efficiency and the running stability of a pump.
Description
Technical field
The present invention relates to a kind of efficient asymmetric diffuser that mates annular pumping chamber, belong to field of fluid machinery.
Background technique
Diffuser is a kind of device that is widely used in the water pump.In some water pumps, owing to the reasons such as structure and design often need to be designed to pumping chamber loop configuration, because the matching properties of annular pumping chamber and impeller is lower, fluid produces larger hydraulic loss in annular pumping chamber, cause pump efficiency lower.Diffuser can be delivered to the downstream from the liquid collection that impeller flows out, and is pressure energy with the kinetic transformation of part liquid stream, eliminates the rotation of liquid stream, can improve significantly pump efficiency.Traditional diffuser blade all adopts the structure that along the circumferential direction is evenly arranged, according to the Fluid Flow in A rule as can be known: the flow that flows out diffuser along the vane rotary direction increases gradually, when the structure that adopts blade to be evenly arranged, flow difference in each runner will cause the liquid velocity skewness, cause hydraulic loss increase in the diffuser, reduce pump efficiency, even bring out pump housing vibration, pump operation stability is exerted an influence.Research data shows that also hydraulic loss occupies larger ratio in the diffuser in whole pump.
Mainly concentrate at present the optimization of the factors such as vane type line, geometric parameter, the number of blade for the research of diffuser.Huang Hui etc. have studied the outlet diameter, blade exit laying angle of diffuser to the impact of impeller matching properties and pump performance.Zhang Desheng etc. have studied the impact of the diagonal pumps stator number of blade on pump performance and pressure pulsation.Zhou Ling etc. study deep-well pump, have analyzed to have cylinder type and two kinds of different leaves forms of meander configuration diffuser to the impact of pump performance.The diffuser that present research is all arranged take blade along even circumferential is research object, not yet from the layout research stator performance of blade, with the efficient of further raising diffuser and with the matching performance of impeller, pumping chamber.Therefore the design that breaks traditions is carried out structural remodeling to diffuser and is had practical significance.
Summary of the invention
In order to improve the efficient of diffuser, the blade that the present invention breaks traditions along the circumferential direction is evenly arranged mode, has proposed the along the circumferential direction diffuser of asymmetric arrangement of a kind of blade.
A kind of efficient asymmetric diffuser that mates annular pumping chamber of the present invention, this diffuser are by blade, and cover plate forms, and diffuser is installed between impeller and the annular pumping chamber.The blade of described diffuser is along the circumference asymmetric arrangement, take the first blade as starting point, along the vane rotary direction, the Exit-edge of adjacent blades and the angle of last exit edge of blade are θ, this angle is relevant with the number of blade, increase gradually by 2 ~ 5 °, and all angle sums are that optimum angle is 0 ~ 15 ° between the Exit-edge place radius of 360 ° of first blades and the annular pumping chamber center line of discharge that the structural parameter such as vaned laying angle, cornerite are all identical.The non-symmetry structure that the present invention proposes all is applicable to the radially design of stator and meander configuration spatial guide blade of cylinder type.
Advantage of the present invention is: increase this characteristic according to fluid on the diffuser outlet flow section along water pump sense of rotation flow, by increasing gradually the angle between the blade, the conveyance capacity of each runner of reconstruct, meet the Real Flow Field rule, the diffuser fluid velocity inside is evenly distributed, thereby reach the purpose that reduces pump internal flow loss, the diffuser of asymmetric arrangement has improved the waterpower matching performance of impeller and pumping chamber, can improve efficient and the operation stability of pump.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is asymmetric mechanism of the present invention guide vane teunnion schematic cross-section.
Fig. 2 is the diffuser shaft section figure that traditional blade is evenly arranged.
Embodiment
After finishing diffuser by traditional design method, blade adopts the asymmetric arrangement mode as shown in Figure 1, and blade 1 is fixed on the cover plate 2, and diffuser is installed between impeller 3 and the annular pumping chamber 4.When the spatial guide blade of the radially stator that designs cylinder type and meander configuration, adopt blade along circumference asymmetric arrangement structure, take Fig. 1 as example: this stator number of blade is 11, take the first blade as starting point, the angle theta of second blade and first blade is 22.7 °, the Exit-edge of adjacent blades and the angle of last exit edge of blade increase gradually with 2 °, it is 15 ° that the Exit-edge of first blade and annular pumping chamber center line of discharge the best are laid angle, vaned laying angle, the structural parameter such as cornerite are identical, traditional blade layout as shown in Figure 2, adopt identical impeller 3 and pumping chamber 4, stator blade 1 arranges that along even circumferential the angle of adjacent blades is 32.7 °.Adopt the CFD means that pump performance is predicted in this example, under the condition of identical impeller and pumping chamber, when adopting asymmetrical diffuser, the efficient of pump improves 1.0% than adopting tradition to be evenly arranged diffuser.Diffuser adopts precision casting process to finish, and guarantees the position of the relative pumping chamber of diffuser during installation.The velocity field that the present invention has improved the diffuser inner fluid distributes, make that flow stream velocity is evenly distributed between each blade passage, reduce hydraulic loss, thereby reach the purpose that reduces pump internal flow loss, the diffuser of asymmetric arrangement has improved the matching performance of impeller and pumping chamber, and then improves efficient and the operation stability of pump.
Claims (3)
1. efficient asymmetric diffuser that mates annular pumping chamber, this diffuser are by blade (1), and cover plate (2) forms, and diffuser is installed between impeller (3) and the annular pumping chamber (4); It is characterized in that blade is fixing on the cover board, blade is asymmetric arrangement along the circumferential direction; Take the first blade as starting point, along the vane rotary direction, the Exit-edge of adjacent blades and the angle of last exit edge of blade are θ, and this angle is relevant with the number of blade, by 2 ~ 5
0Increase gradually, and all angle sums are 360
0
2. the efficient asymmetric diffuser of coupling annular pumping chamber according to claim 1 is characterized in that, vaned laying angle, cornerite etc. structural parameter identical.
3. the efficient asymmetric diffuser of coupling annular pumping chamber according to claim 1 is characterized in that, angle is 0 ~ 15 between the Exit-edge place radius of first blade and the center line of discharge of annular pumping chamber
0
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310001965.8A CN103032370B (en) | 2013-01-04 | 2013-01-04 | Efficient asymmetric guide blade body matched with annular pumping chamber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310001965.8A CN103032370B (en) | 2013-01-04 | 2013-01-04 | Efficient asymmetric guide blade body matched with annular pumping chamber |
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| CN103032370A true CN103032370A (en) | 2013-04-10 |
| CN103032370B CN103032370B (en) | 2015-06-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832460A (en) * | 2015-04-10 | 2015-08-12 | 江苏大学 | Diffuse type diversion ring matched with radial asymmetric guide blade bodies of pump |
| CN108457907A (en) * | 2018-03-28 | 2018-08-28 | 大连理工大学 | One seed nucleus main pump symmetrical expression non-uniform Distribution guide vane structure and guide vane design method |
| CN109508481A (en) * | 2018-10-25 | 2019-03-22 | 江苏泰丰泵业有限公司 | A kind of diagonal pumps spatial guide blade optimum design method |
| CN112196834A (en) * | 2020-10-26 | 2021-01-08 | 江苏大学 | Nonlinear symmetrically-arranged guide vane body with low noise characteristic |
| CN112360805A (en) * | 2020-10-26 | 2021-02-12 | 江苏大学 | Novel asymmetric low-noise centrifugal pump |
| CN114278614A (en) * | 2021-12-27 | 2022-04-05 | 中国北方发动机研究所(天津) | Diffuser structure for inhibiting reverse propagation of pressure fluctuation in volute |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201090529Y (en) * | 2007-08-14 | 2008-07-23 | 上海连成（集团）有限公司 | Novel multi-stage pump guide blade |
| JP2011111958A (en) * | 2009-11-26 | 2011-06-09 | Hitachi Ltd | Water turbine stay vane and water turbine |
| CN202326273U (en) * | 2011-11-03 | 2012-07-11 | 江苏海狮泵业制造有限公司 | Vertical self-priming pump with fixed reversed bending impeller |
| CN203067340U (en) * | 2013-01-04 | 2013-07-17 | 江苏大学 | Efficient asymmetric guide vane body matched with annular pumping chamber |
-
2013
- 2013-01-04 CN CN201310001965.8A patent/CN103032370B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201090529Y (en) * | 2007-08-14 | 2008-07-23 | 上海连成（集团）有限公司 | Novel multi-stage pump guide blade |
| JP2011111958A (en) * | 2009-11-26 | 2011-06-09 | Hitachi Ltd | Water turbine stay vane and water turbine |
| CN202326273U (en) * | 2011-11-03 | 2012-07-11 | 江苏海狮泵业制造有限公司 | Vertical self-priming pump with fixed reversed bending impeller |
| CN203067340U (en) * | 2013-01-04 | 2013-07-17 | 江苏大学 | Efficient asymmetric guide vane body matched with annular pumping chamber |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832460A (en) * | 2015-04-10 | 2015-08-12 | 江苏大学 | Diffuse type diversion ring matched with radial asymmetric guide blade bodies of pump |
| CN108457907A (en) * | 2018-03-28 | 2018-08-28 | 大连理工大学 | One seed nucleus main pump symmetrical expression non-uniform Distribution guide vane structure and guide vane design method |
| CN109508481A (en) * | 2018-10-25 | 2019-03-22 | 江苏泰丰泵业有限公司 | A kind of diagonal pumps spatial guide blade optimum design method |
| CN109508481B (en) * | 2018-10-25 | 2023-05-23 | 江苏泰丰泵业有限公司 | Diagonal flow pump space guide vane optimization design method |
| CN112196834A (en) * | 2020-10-26 | 2021-01-08 | 江苏大学 | Nonlinear symmetrically-arranged guide vane body with low noise characteristic |
| CN112360805A (en) * | 2020-10-26 | 2021-02-12 | 江苏大学 | Novel asymmetric low-noise centrifugal pump |
| CN114278614A (en) * | 2021-12-27 | 2022-04-05 | 中国北方发动机研究所(天津) | Diffuser structure for inhibiting reverse propagation of pressure fluctuation in volute |
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| CN103032370B (en) | 2015-06-10 |
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