CN112604526A - Umbrella-shaped stirrer and design method thereof - Google Patents

Umbrella-shaped stirrer and design method thereof Download PDF

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Publication number
CN112604526A
CN112604526A CN202011510800.XA CN202011510800A CN112604526A CN 112604526 A CN112604526 A CN 112604526A CN 202011510800 A CN202011510800 A CN 202011510800A CN 112604526 A CN112604526 A CN 112604526A
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China
Prior art keywords
umbrella
impeller
shaped
shaft
blades
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CN202011510800.XA
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Chinese (zh)
Inventor
田飞
陈雯雯
张二峰
施卫东
孔令文
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Jiangsu University
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Jiangsu University
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Priority to CN202011510800.XA priority Critical patent/CN112604526A/en
Publication of CN112604526A publication Critical patent/CN112604526A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/305—Treatment of water, waste water or sewage

Abstract

The invention provides an umbrella-shaped stirrer and a design method thereof, wherein the umbrella-shaped stirrer comprises a motor, a shaft, an umbrella-shaped impeller, impeller blades, back blades, an overflowing hole and a plurality of rib plates; one end of the shaft is connected with the motor, the other end of the shaft is connected with the umbrella-shaped impeller through a key, and the umbrella-shaped impeller rotates along with the shaft simultaneously; the upper surface of the umbrella-shaped impeller is provided with a plurality of impeller blades which are uniformly distributed along the circumference; the lower surface of the umbrella-shaped impeller is provided with a plurality of back blades which are uniformly distributed along the circumference; a plurality of overflowing holes which are uniformly distributed along the circumference are arranged on the umbrella-shaped impeller; a ribbed plate is arranged between the umbrella-shaped impeller and the shaft, one end of the ribbed plate is connected with the umbrella-shaped impeller, the other end of the ribbed plate is connected with the shaft, and a plurality of ribbed plates are uniformly distributed around the shaft. A plurality of back blades are designed on the back of the umbrella-shaped impeller, a plurality of overflowing holes are additionally formed in the impeller, a plurality of rib plates are additionally arranged between the shaft and the impeller to promote stirring flow of bottom fluid, the structure of the stirrer is improved, stirring is more sufficient, and therefore working efficiency of the existing stirrer is improved.

Description

Umbrella-shaped stirrer and design method thereof
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to an umbrella-shaped stirrer and a design method thereof.
Background
An umbrella-shaped stirrer is a sewage treatment machine and is widely applied to stirring in pools such as anaerobic pools, oxidation pools and the like. Under the stirring of the umbrella-shaped stirrer, microorganisms, bacteria and the like in the sewage are suspended in the pool, and are adsorbed and reacted with activated sludge or other substances, so that the sewage is purified. With the popularization of science and technology, experts of many scholars at home and abroad gradually research the umbrella-shaped stirrer, and the development of the stirrer gradually tends to be in a better direction by continuously improving the existing stirrer by applying knowledge of various mechanics, materials and the like.
The prior art is as follows: the umbrella-shaped stirrer is vertically arranged, and the impeller is arranged in a diving pool. From the stirring mechanism, the existence of the speed difference of the fluid enables the layers of the fluid to be mixed with each other. The blades are arranged above an umbrella-shaped structure of the existing umbrella-shaped stirrer, so that the liquid around an impeller and the fluid above the impeller form flow circulation, and the purposes of stirring, solid particle suspension and reaction promotion are achieved.
The disadvantages are as follows: because the blades of the umbrella-shaped stirrer are uniformly distributed on the outer surface of the impeller, the blades can only drive liquid above the impeller to flow when in work, and the liquid below the blades is almost static, so that the stirring is insufficient. In engineering, in order to stir the fluid in the whole pool and avoid solid particle precipitation, the stirring shaft can be extended, and the stirring impeller is arranged at the bottom of the pool. When the stirrer runs, the stirrer vibrates seriously, the service life of the stirrer is shortened, and the working efficiency of the stirrer is relatively low.
Disclosure of Invention
Aiming at the technical problems, the invention provides an umbrella-shaped stirrer and a design method thereof.
The technical scheme of the invention is as follows: a design method of an umbrella-shaped stirrer comprises the following steps:
the umbrella-shaped stirrer comprises a motor, a shaft, an umbrella-shaped impeller, impeller blades, back blades, an overflowing hole and a plurality of rib plates; one end of the shaft is connected with the motor, the other end of the shaft is connected with the umbrella-shaped impeller through a key, and the umbrella-shaped impeller rotates along with the shaft simultaneously;
a plurality of impeller blades which are uniformly distributed along the circumference are arranged on the upper surface of the umbrella-shaped impeller;
the lower surface of the umbrella-shaped impeller is provided with a plurality of back blades which are uniformly distributed along the circumference;
a plurality of overflowing holes which are uniformly distributed along the circumference are formed in the umbrella-shaped impeller;
ribbed plates are arranged between the umbrella-shaped impeller and the shaft, one end of each ribbed plate is connected with the umbrella-shaped impeller, the other end of each ribbed plate is connected with the shaft, and the ribbed plates are uniformly distributed around the shaft.
In the above scheme, the number of the impeller blades is z1The number of the back blades is z2，z1And z2Are relatively prime.
In the scheme, the diameter of the umbrella-shaped impeller is D, and the thickness of the impeller blade is b1The height of the impeller blade is h1The diameter of the inlet of the impeller blade is D11The diameter of the outlet of the impeller blade is D12(ii) a The thickness of the back blade is b2The height of the back blade is h2The diameter of the inlet of the back vane is D21The diameter of the outlet of the back vane is D22；D、b1、h1、D11、D12、b2、h2、D21The following relationship is satisfied:
D21＝k0D(0.5<k0<0.9)
D22＝k1D(0.6<k1<1)
b2＝k2b1(0.9<k2<1.1)
h2＝k3h1(0.9<k3<1.1)
D21＝k4D11(0.9<k4<1.1)
D22＝k5D12(0.9<k5<1.1)。
furthermore, the number of the overflowing holes is Z3The aperture of the overflowing hole is D3The distance between the overflowing hole and the central position of the umbrella disk is D4Then D is3＝2～3cm，Z 33 to 5, D4＝0.2～0.5D。
Furthermore, the included angle between the rib plate and the shaft in the vertical plane is gamma, the vertical distance H between the center of the umbrella-shaped impeller and the top of the rib plate, and the diameter of a circular surface where the contact point of the umbrella-shaped impeller and the rib plate is located is D5And beta is the opening angle of the umbrella-shaped impeller and conforms to the following relation:
D4<D5<D11
Figure BDA0002846346170000021
in the above scheme, the number of the rib plates is 4n, and n is a positive integer.
In the above solution, the curve of the back blade can be expressed by an equation in a r- θ coordinate system:
r＝a0+a1cosθ+a2sinθ+a3cos2θ……+an sinθcosθ
wherein, a0，a1、a2、a3……anAre all constant and are not all 0,
Figure BDA0002846346170000022
an umbrella-shaped stirrer is designed according to the umbrella-shaped stirrer design method.
Compared with the prior art, the invention has the beneficial effects that: the stirrer is provided with a back blade, an overflowing hole and a ribbed plate, wherein the back blade stirs fluid flow below the umbrella-shaped impeller; part of fluid above the umbrella-shaped impeller can flow into the lower part of the impeller through the overflowing hole; the rib plate not only increases the stability of the umbrella-shaped impeller, but also can increase the stirring effect of the fluid along with the rotation of the shaft. The back blade, the overflowing hole and the ribbed plate act together, so that the fluid is fully stirred, the fluid in the whole pool forms large circulation, the fluid in the whole pool is stirred more fully, and the working efficiency of the stirrer is improved. And the modified part is only provided with an umbrella-shaped structure, so that the stirrer is convenient to manufacture, has low manufacturing cost, can improve the efficiency, and can prolong the service life of the stirrer to a certain extent. In addition, the stirred liquid can be more uniform, and the requirements of social production are met.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic bottom view of an embodiment of the present invention.
FIG. 3 is a schematic top view of an embodiment of the present invention.
Fig. 4 is a schematic view of a flow field distribution according to an embodiment of the present invention.
In the figure: 1. a shaft; 2. an umbrella-shaped impeller; 3. an impeller blade; 4. back vane 5, overflow hole; 6. a plurality of ribs.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1, 2 and 3 show a preferred embodiment of the design method of the umbrella-shaped stirrer, which comprises the following steps:
the umbrella-shaped stirrer comprises a motor, a shaft 1, an umbrella-shaped impeller 2, impeller blades 3, back blades 4, an overflowing hole 5 and a plurality of rib plates 6; one end of the shaft 1 is connected with a motor, the other end of the shaft is connected with the umbrella-shaped impeller 2 through a key, and the umbrella-shaped impeller 2 rotates along with the shaft;
the upper surface of the umbrella-shaped impeller 2 is provided with a plurality of impeller blades 3 which are uniformly distributed along the circumference;
the lower surface of the umbrella-shaped impeller 2 is provided with a plurality of back blades 4 which are uniformly distributed along the circumference, and the back blades 4 and the blades 3 rotate along with the umbrella-shaped impeller 2;
a plurality of overflowing holes 5 which are uniformly distributed along the circumference are arranged on the umbrella-shaped impeller 2 to promote the flow exchange of upper and lower fluids; greatly improving the working effect of the stirrer.
Be equipped with floor 6 between umbelliform impeller 2 and the axle 1, floor 6's one end is connected with umbelliform impeller 2, and floor 6 other end is connected with axle 1, and many floor 6 evenly distributed are around axle 1 to rotate along with axle 1, further make the stirring effect better.
The number of the impeller blades 3 is z1The number of the back blades 4 is z2，z1And z2Are relatively prime.
The diameter of the umbrella-shaped impeller 2 is D, and the thickness of the umbrella-shaped impeller 2 is h; the thickness of the impeller blade 3 is b1The thickness of the umbrella-shaped impeller 2 is h, and the height of the impeller blade 3 is h1The diameter of the inlet of the impeller blade 3 is D11The diameter of the outlet of the impeller blade 3 is D12(ii) a The back vane 4 has the thickness of b2The height of the back vane 4 is h2The diameter of the inlet of the back vane 4 is D21The diameter of the outlet of the back vane 4 is D22；D、b1、h1、D11、D12、b2、h2、D21The following relations are satisfied, the practical processing and manufacturing are met, and the stirring effect is improved.
D21＝k0D(0.5<k0<0.9)
D22＝k1D(0.6<k1<1)
b2＝k2b1(0.9<k2<1.1)
h2＝k3h1(0.9<k3<1.1)
D21＝k4D11(0.9<k4<1.1)
D22＝k5D12(0.9<k5<1.1)。
The number of the overflowing holes 5 is Z3The diameter of the overflowing hole 5 is D3The distance from the overflowing hole 5 to the central position of the umbrella disk is D4Then D is3＝2～3cm，Z 33 to 5, D40.2 ~ 0.5D, both accorded with reality preparation demand, satisfy the mechanics relation, promote the stirring effect.
The included angle between the ribbed plate 6 and the shaft 1 in a vertical plane is gamma, the vertical distance H between the center of the umbrella-shaped impeller 2 and the top of the ribbed plate 6, and the diameter of a circular surface where the contact point of the umbrella-shaped impeller 2 and the ribbed plate 6 is located is D5Beta is the opening angle of the umbrella-shaped impeller and accords with the following relationship, thereby improving the stirring effect.
D4<D5<D11
Figure BDA0002846346170000041
The number of the ribs can be determined to be 4n based on the balance of forces and the stirring effect, n is a positive integer, the cross section of the ribs is circular, and the diameter of the ribs is d.
An umbrella-shaped stirrer is designed according to the umbrella-shaped stirrer design method.
The invention relates to an umbrella-shaped stirrer with back blades. As shown in fig. 4, the dotted area is a liquid area and the agitation tank is generally cylindrical. During stirring, the motor drives the shaft 1 to rotate, and the umbrella-shaped impeller 2 is arranged on the shaft 1 and moves circularly along with the shaft 1.
The back blade curve can be expressed by an equation in an r-theta coordinate system, and the blade curve which is more consistent with the flow of the fluid is obtained according to the streamline of the stirred liquid:
r＝a0+a1cosθ+a2sinθ+a3cos2θ……+an sinθcosθ
wherein, a0，a1、a2、a3……anAre all constant and are not all 0,
Figure BDA0002846346170000051
an appropriate curve equation can be selected according to specific requirements.
The traditional umbrella-shaped stirrer can only form fluid flow in the area 1 and the area 2, the fluid velocity at the bottom of the umbrella-shaped impeller is very low, and a large amount of solid particle sediment is collected. The invention adds back blades, overflowing holes and ribbed plates on the basis of the existing mixer design. The fluid under the back blade mixing umbrella impeller (as area 3 in fig. 4) flows; part of fluid above the umbrella-shaped impeller can flow into the lower part of the impeller through the overflowing hole; the rib plate not only increases the stability of the umbrella-shaped impeller, but also can increase the stirring effect of the fluid along with the rotation of the shaft. The back blades, the overflowing holes and the rib plates act together, so that the fluids in the region 1, the region 2 and the region 3 in the picture 4 are fully stirred, the whole pool fluid forms large circulation, the fluids in the whole pool are stirred more fully, and the working efficiency of the stirrer is improved. And the modified part only has an umbrella-shaped structure, so that the manufacturing is convenient, and the manufacturing cost is low. Therefore, the efficiency can be improved after the stirrer is manufactured, and the service life of the stirrer can be prolonged to a certain extent. In addition, the stirred liquid can be more uniform, and the requirements of social production are met.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (8)

1. The design method of the umbrella-shaped stirrer is characterized by comprising the following steps of:
the umbrella-shaped stirrer comprises a motor, a shaft (1), an umbrella-shaped impeller (2), impeller blades (3), back blades (4), an overflowing hole (5) and a plurality of rib plates (6); one end of the shaft (1) is connected with the motor, the other end of the shaft is connected with the umbrella-shaped impeller (2) through a key, and the umbrella-shaped impeller (2) rotates along with the shaft simultaneously;
a plurality of impeller blades (3) which are uniformly distributed along the circumference are arranged on the upper surface of the umbrella-shaped impeller (2);
a plurality of back blades (4) which are uniformly distributed along the circumference are arranged on the lower surface of the umbrella-shaped impeller (2);
a plurality of overflowing holes (5) which are uniformly distributed along the circumference are formed in the umbrella-shaped impeller (2);
be equipped with floor (6) between umbelliform impeller (2) and axle (1), the one end and the umbelliform impeller (2) of floor (6) are connected, and floor (6) other end is connected with axle (1), and many floor (6) evenly distributed are around axle (1).
2. Umbrella mixer design method according to claim 1, characterized in that the number of impeller blades (3) is z1The number of the back blades (4) is z2，z1And z2Are relatively prime.
3. Umbrella mixer design method according to claim 1, characterized in that the diameter of the umbrella impeller (2) is D and the thickness of the impeller blades (3) is b1The height of the impeller blade (3) is h1The diameter of the inlet of the impeller blade (3) is D11The diameter of the outlet of the impeller blade (3) is D12(ii) a The thickness of the back vane (4) is b2The height of the back vane (4) is h2The diameter of the inlet of the back vane (4) is D21The diameter of the outlet of the back vane (4) is D22；D、b1、h1、D11、D12、b2、h2、D21The following relationship is satisfied:
D21＝k0D(0.5<k0<0.9)
D22＝k1D(0.6<k1<1)
b2＝k2b1(0.9<k2<1.1)
h2＝k3h1(0.9<k3<1.1)
D21＝k4D11(0.9<k4<1.1)
D22＝k5D12(0.9<k5<1.1)。
4. umbrella mixer design method according to claim 3, characterized in that the number of overflow holes (5) is Z3The aperture of the overflowing hole (5) is D3The distance between the overflowing hole (5) and the central position of the umbrella disk is D4Then, then
D3＝2～3cm，
Z33-5 of the active ingredients are added,
D4＝0.2～0.5D。
5. an umbrella mixer design method according to claim 4, characterized in that the rib (6) has an angle γ with the shaft (1) in the vertical plane, the perpendicular distance H between the center of the umbrella impeller (2) and the top of the rib (6), and the diameter D of the circular surface where the contact point of the umbrella impeller (2) and the rib (6) is located5And beta is the opening angle of the umbrella-shaped impeller and conforms to the following relation:
D4<D5<D11
Figure FDA0002846346160000021
6. umbrella mixer design method according to claim 1, characterized in that the number of ribs (6) is 4n, n being a positive integer.
7. Umbrella mixer design method according to claim 1, characterized in that the back blade (4) curve can be expressed in the r-theta coordinate system with the equation:
r＝a0+a1cosθ+a2sinθ+a3cos2θ……+ansinθcosθ
wherein, a0，a1、a2、a3……anAre all constant and are not all 0,
Figure FDA0002846346160000022
8. an umbrella-shaped agitator, wherein the umbrella-shaped agitator is designed according to the design method of the umbrella-shaped agitator of any one of claims 1 to 6.
CN202011510800.XA 2020-12-18 2020-12-18 Umbrella-shaped stirrer and design method thereof Pending CN112604526A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009052444A (en) * 2007-08-24 2009-03-12 Kawamoto Pump Mfg Co Ltd Submersible pump for deep well
CN106493000A (en) * 2016-10-28 2017-03-15 河南理工大学 A kind of bottom driving type lab flotation cell
CN106994307A (en) * 2017-04-07 2017-08-01 南京中德环保设备制造有限公司 A kind of vertical mixer high-efficiency stirring turbine
CN108236860A (en) * 2018-03-19 2018-07-03 江苏开放大学（江苏城市职业学院） A kind of automatically cleaning vertical mixer
CN108404711A (en) * 2018-05-23 2018-08-17 江苏大学 A kind of Fermat spiral surface Agitator Impeller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009052444A (en) * 2007-08-24 2009-03-12 Kawamoto Pump Mfg Co Ltd Submersible pump for deep well
CN106493000A (en) * 2016-10-28 2017-03-15 河南理工大学 A kind of bottom driving type lab flotation cell
CN106994307A (en) * 2017-04-07 2017-08-01 南京中德环保设备制造有限公司 A kind of vertical mixer high-efficiency stirring turbine
CN108236860A (en) * 2018-03-19 2018-07-03 江苏开放大学（江苏城市职业学院） A kind of automatically cleaning vertical mixer
CN108404711A (en) * 2018-05-23 2018-08-17 江苏大学 A kind of Fermat spiral surface Agitator Impeller

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Application publication date: 20210406