CN112651114B - Guide hood with guide vanes and hydraulic design method thereof - Google Patents
Guide hood with guide vanes and hydraulic design method thereof Download PDFInfo
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- CN112651114B CN112651114B CN202011514679.8A CN202011514679A CN112651114B CN 112651114 B CN112651114 B CN 112651114B CN 202011514679 A CN202011514679 A CN 202011514679A CN 112651114 B CN112651114 B CN 112651114B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000004323 axial length Effects 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 15
- 239000010865 sewage Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Computer Hardware Design (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention provides a guide hood with guide vanes and a hydraulic design method thereof, comprising the following steps that the guide vanes are arranged in a guide hood shell of the guide hood; the main geometric parameters of the guide cover and the guide vanes thereof can be determined, wherein the main geometric parameters comprise a guide vane inlet setting angle alpha 3, a guide vane outlet setting angle alpha 4, a guide vane height h, a guide vane axial length L, a guide cover diameter d, a guide cover axial length L and the guide vane number z, so that the original spiral motion can be better converted into the required axial motion, meanwhile, the fluid after passing through the guide vanes is reduced in kinetic energy and increased in pressure energy, the circulating power can be better provided for the system, and the integral working efficiency of the stirrer is improved.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a guide vane-containing guide hood and a hydraulic design method thereof.
Background
In the field of sewage treatment, submersible mixers are commonly used to power the mixing, agitation and circulation of sewage. After the fluid is ejected by the impeller of the mixer, there is forward axial and rotational movement, so the flow of fluid after being mixed by the mixer is a spiral forward movement. While for the case where only axial movement is required to push the cycle, the pod is required to be added.
The kuppe is the important accessory that is used for strengthening the water conservancy diversion effect of installing on the mixer, and conventional kuppe is mostly funnel cylindrical. After passing through the cylindrical guide cover, the fluid can flow along the axial direction. While that part of the energy of the swirling motion is consumed.
Disclosure of Invention
Aiming at the technical problems, the invention provides a guide vane-containing guide hood and a hydraulic design method thereof, wherein guide vanes are arranged in an inlet of a guide hood shell of the guide hood; the main geometric parameters of the guide cover and the guide vanes thereof can be determined, wherein the main geometric parameters comprise a guide vane inlet setting angle alpha 3, a guide vane outlet setting angle alpha 4, a guide vane height h, a guide vane axial length L, a guide cover diameter d, a guide vane axial length L and a guide vane number z, so that the original spiral motion can better convert the swirling motion of fluid into the axial motion, the velocity annular quantity of the fluid after stirring is eliminated, the kinetic energy of the circumferential velocity of the fluid medium is converted into pressure energy, meanwhile, the fluid after passing through the guide vanes is reduced in kinetic energy and increased in pressure energy, the circulating power can be better provided for a system, and the integral working efficiency of the stirrer is improved.
The technical scheme of the invention is as follows: a hydraulic design method of a guide vane-containing guide vane guide hood comprises the following steps:
A guide vane is arranged in a guide vane shell of the guide vane;
Determining an inlet placement angle of the vane:
wherein:
alpha 3 -guide vane inlet setting angle, unit degree;
alpha 3' — inlet flow angle in degrees;
Delta alpha-angle of attack, in degrees;
v m3 —the speed of the inlet shaft face of the guide vane, in m/s;
v u3 —the circumferential component speed of the inlet of the guide vane, unit m/s;
v m2 -impeller blade outlet circumferential component speed, unit m/s;
Psi 3 -impeller blade inlet displacement coefficient;
d 3, calculating the inlet diameter of the flow surface, and the unit m;
d h, the diameter of the hub, and the unit m;
H-head, unit m;
u-impeller speed, unit m/s;
η h —efficiency in units;
n-the rotation speed, unit r/min;
t 3 -impeller blade intercept, unit m;
s u3, namely thickness in the circumferential direction of the inlet of the guide vane, and the unit is m;
s 3, namely calculating the thickness of the flow surface of the point at which the guide vane is imported, wherein the unit is m;
-determining an outlet setting angle a 4 of the guide vane (6):
α4＝80°～90°。
in the above scheme, the method further comprises the step of determining the axial length l of the guide vane:
l＝(0.5～0.7)D2，
wherein: d 2 —impeller edge diameter.
In the above scheme, the method further comprises the step of determining the blade height h of the guide blade:
In the above scheme, the method further comprises the step of determining the diameter d of the air guide sleeve:
the diameter D of the air guide sleeve is larger than the diameter D 2：d＝(1.2～1.5)D2 of the edge of the impeller.
In the above scheme, the method further comprises the step of determining the number of blades of the guide vane:
let the number of blades of the guide vane be Z, the number of blades of the impeller be Z, the mutual quality of Z and Z is required, and
In the above scheme, the method further comprises the step of determining the distance S between the inlet end of the guide vane and the outlet end of the impeller blade:
S＝(0.1-0.15)D2。
In the above scheme, the method further comprises the step of determining the distance l 1 between the inlet of the air guide sleeve and the impeller:
l1＝(1.2-1.6)D2。
in the above scheme, the method further comprises the step of determining the axial length L of the air guide sleeve:
L＝l+S+m+l1
wherein:
m-axial width of impeller blades.
And l 1, the distance between the inlet of the air guide sleeve and the impeller.
The guide hood with the guide vanes is designed according to a guide hood hydraulic design method with the guide vanes.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the guide vanes are added in the guide cover, so that the movement rule of fluid from the impeller of the mixer is more met, the original spiral movement can be better converted into the required axial movement, meanwhile, the fluid after passing through the guide vanes is reduced in kinetic energy and increased in pressure energy, the circulating power can be better provided for the system, and the overall working efficiency of the mixer is improved. According to the calculation method, main geometric parameters of the guide cover and the guide vanes of the guide cover can be determined according to parameters of the mixer, wherein the main geometric parameters comprise the guide vane inlet placing angle alpha 3, the guide vane outlet placing angle alpha 4, the guide vane height h, the guide vane axial length L, the guide cover diameter d, the guide cover axial length L and the guide vane number z, the design can be carried out according to actual working conditions, and the overall working efficiency of the mixer is improved.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
Fig. 2 is a bottom view of an embodiment of the present invention.
Fig. 3 is a velocity flow field profile of an embodiment of the present invention.
In the figure: 1-submersible mixer, 2-kuppe fixed bolster, 3-pump shaft, 4-impeller, 5-kuppe shell, 6-stator.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
A hydraulic design method of a guide vane-containing guide vane guide hood comprises the following steps:
FIGS. 1 and 2 show a preferred embodiment of the guide vane pod comprising a submersible mixer 1, a pod mounting bracket 2, a pump shaft 3, an impeller 4 and a pod housing 5; a guide vane 6 is arranged in a guide vane shell 5 of the guide vane;
In the embodiment, the design working condition flow rate Q=350l/s, the lift H=6.72 m, the rotating speed 1450r/min, the number of impeller blades is 7, the hub diameter d h =134 mm, the inlet diameter is 292mm, eta h =0.88, and the axial width m of the blades is 54mm.
Embodiments preferably determine the vane inlet placement angle α 3, the vane outlet placement angle α 4, the vane height h, the vane axial length L, the vane diameter d, the vane axial length L, the vane number z by giving several relationships:
Determining an inlet placement angle of the guide vane 6:
wherein:
alpha 3 -guide vane inlet setting angle, unit degree;
alpha 3' — inlet flow angle in degrees;
Delta alpha-angle of attack, in degrees;
v m3 —the speed of the inlet shaft face of the guide vane, in m/s;
v u3 —the circumferential component speed of the inlet of the guide vane, unit m/s;
v m2 -impeller blade outlet circumferential component speed, unit m/s;
Psi 3 -impeller blade inlet displacement coefficient;
d 3, calculating the inlet diameter of the flow surface, and the unit m;
d h, the diameter of the hub, and the unit m;
H-head, unit m;
u-impeller speed, unit m/s;
η h —efficiency in units;
n-the rotation speed, unit r/min;
t 3 -impeller blade intercept, unit m;
s u3, namely thickness in the circumferential direction of the inlet of the guide vane, and the unit is m;
s 3, namely calculating the thickness of the flow surface of the point at which the guide vane is imported, wherein the unit is m;
Determining an outlet setting angle a 4 of the guide vane 6:
α4＝80°～90°。
Determining the axial length l of the guide vane 6:
l＝(0.5～0.7)D2，
wherein: d 2 —impeller edge diameter.
Determining a blade height h of the guide vane 6:
Determining the diameter d of the air guide sleeve:
the diameter D of the air guide sleeve is larger than the diameter D 2：d＝(1.2～1.5)D2 of the edge of the impeller.
In the above scheme, the method further comprises the step of determining the number of blades of the guide vane 6:
let the number of blades of the guide vane 6 be Z, the number of blades of the impeller be Z, and the mutual quality of Z and Z is required
Determining the distance S between the inlet end of the guide vane 6 and the outlet end of the impeller blade:
S＝(0.1-0.15)D2。
determining the distance l 1 between the inlet of the air guide sleeve and the impeller:
l1＝(1.2-1.6)D2。
determining the axial length L of the air guide sleeve:
L＝l+S+m+l1
wherein: m-axial width of impeller blades.
And (3) calculating:
α3＝64.63
α4＝90°
h＝125mm
l＝128.15mm
d＝380mm
L＝532.15mm
z＝8。
The invention provides a guide hood structure with guide vanes, and hydraulic design is carried out on the guide hood guide vanes by adopting an accurate formula design method. The effective propulsion distance of a submersible mixer with a common guide vane is 12 meters, the effective radial diffusion distance is 2 meters, the guide vane is modified, and the effective propulsion distance is 15 meters and the effective radial diffusion distance is 2 meters after the guide vane with the guide vane designed by the invention is installed. From this, it can be seen that the guide vane can effectively increase the axial thrust distance of the submersible mixer. The utilization rate and the utilization efficiency of the water flow at the outlet of the impeller of the stirrer are improved, and good economic benefits are achieved.
As shown in fig. 3, the left is the velocity flow field distribution diagram of the fluid at the impeller outlet of the submersible mixer with the common guide vane, and the right is the velocity flow field distribution diagram of the fluid at the impeller outlet after the guide vane with the guide vane designed according to the invention is installed. By comparison, the axial velocity of the fluid is obviously increased and the axial pushing distance is obviously improved after the guide vane-containing guide vane guide cover designed by the invention is installed.
The invention also provides a guide vane-equipped guide vane, and the guide vane-equipped guide vane is designed according to the guide vane-equipped guide vane hydraulic design method.
According to the invention, the guide vanes are added in the guide cover, so that the movement rule of fluid from the impeller of the mixer is more met, the original spiral movement can be better converted into the required axial movement, meanwhile, the fluid after passing through the guide vanes is reduced in kinetic energy and increased in pressure energy, the circulating power can be better provided for the system, and the overall working efficiency of the mixer is improved. According to the calculation method, main geometric parameters of the guide cover and the guide vanes of the guide cover can be determined according to parameters of the mixer, wherein the main geometric parameters comprise the guide vane inlet placing angle alpha 3, the guide vane outlet placing angle alpha 4, the guide vane height h, the guide vane axial length L, the guide cover diameter d, the guide cover axial length L and the guide vane number z, the design can be carried out according to actual working conditions, and the overall working efficiency of the mixer is improved.
It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (4)
1. The hydraulic design method of the guide hood with the guide vanes is characterized by comprising the following steps that the guide vanes (6) are arranged in a guide hood shell (5) of the guide hood;
-determining an inlet setting angle of the guide vane (6):
wherein:
q-design condition flow;
z—number of guide vanes;
alpha 3 -guide vane inlet setting angle, unit degree;
alpha 3' — inlet flow angle in degrees;
Delta alpha-angle of attack, in degrees;
v m3 —the speed of the inlet shaft face of the guide vane, in m/s;
v u3 —the circumferential component speed of the inlet of the guide vane, unit m/s;
v u2 -impeller blade outlet circumferential component speed, unit m/s;
Psi 3 -impeller blade inlet displacement coefficient;
d 3, calculating the inlet diameter of the flow surface, and the unit m;
d h, the diameter of the hub, and the unit m;
H-head, unit m;
u-impeller speed, unit m/s;
η h —efficiency in units;
n-the rotation speed, unit r/min;
t 3 -impeller blade intercept, unit m;
s u3, namely thickness in the circumferential direction of the inlet of the guide vane, and the unit is m;
s 3, namely calculating the thickness of the flow surface of the point at which the guide vane is imported, wherein the unit is m;
-determining an outlet setting angle a 4 of the guide vane (6):
α4＝80°～90°；
further comprising the step of determining the axial length l of the guide vane (6):
l＝(0.5～0.7)D2，
wherein: d 2 —impeller edge diameter;
the method further comprises the step of determining the diameter d of the dome:
The diameter D of the air guide sleeve is larger than the diameter D 2：d＝(1.2～1.5)D2 of the edge of the impeller;
the method further comprises the step of determining the distance S of the inlet end of the guide vane (6) from the outlet end of the impeller blade:
S＝(0.1～0.15)D2；
The method further comprises the step of determining the distance l 1 between the inlet of the air guide sleeve and the impeller:
l1＝(1.2～1.6)D2；
The method further comprises the step of determining the axial length L of the air guide sleeve:
L＝l+S+m+l1
wherein: m-axial width of impeller blades.
2. The method of hydraulic design of a guide vane pod according to claim 1, further comprising the step of determining the vane height h of the guide vane (6):
3. The method of hydraulic design of a guide vane pod according to claim 1, further comprising the step of determining the number of blades of the guide vane (6):
the number of blades of the guide vane (6) is Z, the number of blades of the impeller is Z, and the mutual quality of Z and Z is required
4. A guide vane-equipped guide vane pod, characterized in that the guide pod is designed according to the guide pod hydraulic design method of any one of claims 1-3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011514679.8A CN112651114B (en) | 2020-12-18 | 2020-12-18 | Guide hood with guide vanes and hydraulic design method thereof |
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| CN202011514679.8A CN112651114B (en) | 2020-12-18 | 2020-12-18 | Guide hood with guide vanes and hydraulic design method thereof |
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| CN112651114A CN112651114A (en) | 2021-04-13 |
| CN112651114B true CN112651114B (en) | 2024-05-14 |
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| CN113049770B (en) * | 2021-06-02 | 2021-08-27 | 碧兴物联科技(深圳)股份有限公司 | Computing method, device, equipment and storage medium for water quality on-line monitor |
Citations (3)
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|---|---|---|---|---|
| CN205895688U (en) * | 2016-08-16 | 2017-01-18 | 台州锦霸工贸有限公司 | Impeller subassembly for well in immersible pump |
| CN208565074U (en) * | 2017-12-29 | 2019-03-01 | 广州市洛森通风设备制造有限公司 | A kind of centrifugal blower with guide vane and radome fairing |
| CN210461092U (en) * | 2019-07-18 | 2020-05-05 | 汉能（天津）工业泵有限公司 | Ultra-light large-flow submersible axial-flow pump |
-
2020
- 2020-12-18 CN CN202011514679.8A patent/CN112651114B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205895688U (en) * | 2016-08-16 | 2017-01-18 | 台州锦霸工贸有限公司 | Impeller subassembly for well in immersible pump |
| CN208565074U (en) * | 2017-12-29 | 2019-03-01 | 广州市洛森通风设备制造有限公司 | A kind of centrifugal blower with guide vane and radome fairing |
| CN210461092U (en) * | 2019-07-18 | 2020-05-05 | 汉能（天津）工业泵有限公司 | Ultra-light large-flow submersible axial-flow pump |
Non-Patent Citations (2)
| Title |
|---|
| 王涛.水泵及水泵站习题实验课程设计指导书.水利电力出版社,1995,第168-170页. * |
| 肖钢等.海洋能 日月与大海的结晶.武汉大学出版社,2013,第38页. * |
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