CN204692185U - A kind of efficient centrifugal blower based on computational fluid dynamics simulation - Google Patents
A kind of efficient centrifugal blower based on computational fluid dynamics simulation Download PDFInfo
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- CN204692185U CN204692185U CN201520265759.2U CN201520265759U CN204692185U CN 204692185 U CN204692185 U CN 204692185U CN 201520265759 U CN201520265759 U CN 201520265759U CN 204692185 U CN204692185 U CN 204692185U
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- spiral case
- centrifugal blower
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- computational fluid
- dynamics simulation
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Abstract
The utility model discloses a kind of efficient centrifugal blower based on computational fluid dynamics simulation.Technological points of the present utility model is, the outer molded line of spiral case adopts spiral of Archimedes, and the cross section of spiral case adopts Bezier; The outlet diameter of spiral case reduces relative to former type, the aperture of spiral case increases relative to former type, the position of snail tongue increases relative to former type, namely adopt short snail tongue, concrete size meet use computational fluid dynamics simulation to its carry out complete machine numerical simulation, separately energy spectrometer is carried out to blower fan each several part runner and optimizes and draw.The utility model provides a kind of efficient centrifugal blower based on computational fluid dynamics simulation, consider the three-dimensional viscous flows of spiral case inside, the flow losses of spiral case are reduced, the polytropic efficiency and the pressure ratio that finally realize this centrifugal blower are improved, and have widened the range of operation of blower under large discharge operating mode simultaneously.
Description
Technical field
The utility model belongs to fluid machinery technical field, is specifically related to a kind of efficient centrifugal blower based on computational fluid dynamics simulation.
Background technique
At present, the blower that China uses is mostly the product of the seventies and eighties, due to the restriction of design condition at that time, the efficiency of blower is general not high, wherein traditional Volute Design, what be generally similar to presses free-pouring track, namely design according to conservation of angular momentum theorem, have ignored the viscosity of fluid, spiral case inlet pressure is a spiral of Archimedes, usually replace with four circular arcs to simplify, the shape in spiral case cross section then comprises trapezoidal, Bezier type, circular etc., the design method of spiral case adopts method that is theoretical and experience combination, do not consider the complex three-dimensional viscous flow of spiral case inside completely, make flow losses in spiral case larger, under large discharge operating mode, efficiency sharply reduces simultaneously, large discharge range of operation is narrower, centrifugal blower overall operation efficiency is not high.
Summary of the invention
The purpose of this utility model is for above-mentioned the deficiencies in the prior art, provides a kind of efficient centrifugal blower based on computational fluid dynamics simulation.The utility model considers the three-dimensional viscous flows of spiral case inside, and the flow losses of spiral case are reduced, and the polytropic efficiency and the pressure ratio that finally realize this centrifugal blower are improved, and have widened the range of operation of blower under large discharge operating mode simultaneously.
The purpose of this utility model realizes by the following technical solutions: should based on the efficient centrifugal blower of computational fluid dynamics simulation, its flow passage components comprise inlet means, impeller and spiral case, gas is from fan inlet assembly axis to entering impeller, then spiral case is entered, from volute outlet out; Be characterized in: the outer molded line of spiral case adopts spiral of Archimedes, the cross section of spiral case adopts Bezier; The outlet diameter of spiral case reduces relative to former type, the aperture of spiral case increases relative to former type, the position of snail tongue increases relative to former type, namely adopt short snail tongue, concrete size meet use computational fluid dynamics simulation to its carry out complete machine numerical simulation, separately energy spectrometer is carried out to blower fan each several part runner and optimizes and draw.
Concrete, described former type is D250-11 centrifugal blower, and the outlet diameter of described spiral case is reduced to 447.8mm, and the aperture of described spiral case is increased to 308.9mm, and the position of described snail tongue increases to the position being positioned at and departing from 28 ° with spiral case Vertical direction.
Concrete, the angle in the Bezier cross section of described spiral case is 70 °.
The utility model is by the computational fluid dynamics simulation to the former type of centrifugal blower, labor centrifugal blower interior flow field situation, respectively efficiency analysis is carried out to inlet channel, impeller channel and spiral casing flow passage, find and cause the not high main portions of blower efficiency to be spiral casing flow passage, and then carry out structure of modification for spiral case, and computational fluid dynamics simulation is carried out to improved centrifugal blower, the centrifugal blower after being finally optimized.
Compared with prior art, the beneficial effects of the utility model are: adopt after optimizing spiral case, this centrifugal blower is at 400m
3during/min operating point for design, exit static pressure power promotes 1358.1Pa, and air horsepower reduces 2.86kW, and polytropic efficiency improves 4.384%, and widened the range of operation of blower fan under large discharge operating mode, polytropic efficiency is relatively high simultaneously.
Accompanying drawing explanation
Fig. 1 is the perspective view before the utility model embodiment centrifugal blower is optimized.
Fig. 2 is the physical dimension figure of the outer molded line of spiral case before the utility model embodiment centrifugal blower is optimized.
Fig. 3 is the physical dimension figure of the spiral case cross section before the utility model embodiment centrifugal blower is optimized.
Fig. 4 is the physical dimension figure of the outer molded line of spiral case after the utility model embodiment centrifugal blower is optimized.
Fig. 5 is the physical dimension figure of the spiral case cross section after the utility model embodiment centrifugal blower is optimized.
Fig. 6 is the exit static pressure power comparative analysis figure before and after the utility model embodiment centrifugal blower is optimized.
Fig. 7 is the polytropic efficiency comparative analysis figure before and after the utility model embodiment centrifugal blower is optimized.
Fig. 8 is the air horsepower comparative analysis figure before and after the utility model embodiment centrifugal blower is optimized.
Embodiment
See Fig. 1, efficient centrifugal blower based on computational fluid dynamics simulation of the present utility model, its parts composition forms identical with the parts of centrifugal blower common shown in Fig. 1, its flow passage components include inlet means, impeller and spiral case, gas is from fan inlet assembly axis to entering impeller, the impeller of High Rotation Speed is to air work, gas velocity and pressure are all improved, then spiral case is entered, gas velocity reduction converts kinetic energy to pressure energy, and volute of blower outlet obtains higher static energy.In Fig. 1,1 is spiral case, and 2 is impeller, and 3 is blade, and 4 is the axial inlet of blower fan, and 5 is snail tongue, and 6 is volute outlet.See Fig. 2 to Fig. 5, the feature of the utility model efficient centrifugal blower is: the outer molded line of spiral case adopts spiral of Archimedes, and the cross section of spiral case adopts Bezier; The outlet diameter of spiral case reduces relative to former type, and the aperture of spiral case increases relative to former type, and the position of snail tongue increases relative to former type, namely adopts short snail tongue, is conducive to the efficiency under raising large discharge; Concrete size meet use computational fluid dynamics simulation to its carry out complete machine numerical simulation, separately energy spectrometer is carried out to blower fan each several part runner and optimizes and draw.
Below with the former type centrifugal blower that is D250-11 for optimization object, be further described the utility model, this blower fan structure is shown in Fig. 1.Its rotating speed is 2950rpm, the circular import of fan inlet 4 to be diameters be 550mm, and impeller 2 is double shrouded wheel, impeller 2 inlet diameter is 560mm, impeller 2 outlet diameter is 1170mm, and blade 3 entrance width is 76mm, and blade 3 exit width is 43mm, spiral case 1 outlet diameter is 450mm, have 19 circular arc vanes 3 in impeller 2, blade 3 thickness is 4mm, and the stagger angle of blade 3 is 31 °, exit installation angle is 50 °, and design discharge is 400m
3/ min, design voltage rise is 20kPa, and the parameter of spiral case is shown in Fig. 2, Fig. 3.Numerical model is set up according to import, outlet, spiral case parameter, carry out computational fluid dynamics simulation, obtain the performance curve of blower in whole operating mode, by calculating the polytropic efficiency, total pressure efficiency and the flow losses that contrast inlet channel, impeller channel and spiral casing flow passage, find that the loss of spiral case is larger.Therefore when keeping this blower inlet and impeller wheel portion is constant, following Transform Type design is carried out to spiral case: (1) spiral case adopts spiral of Archimedes, 0 °, 90 °, 180 °, 270 °, 332 ° (0 ° is position directly over spiral case, i.e. the position of e in Fig. 4) from molded line spiral case to the distance at spiral case center be 968.9mm, 891.0mm, 813.9mm, 736.7mm, 694.4mm.(2) trapezoid cross section that spiral case cross section is 45 ° by original spiral case angle changes the Bezier cross section that angle is 70 ° into, as shown in Figure 5.(3) outlet diameter of centrifugal blower spiral case is decreased to 447.8mm by 450mm.(4) aperture of spiral case increases to 308.9mm by original 300mm.(5) the snail tongue after optimizing is positioned at the position of to depart from 28 ° with Vertical direction (position of c-e section), as shown in Figure 4.Centrifugal blower after optimization spiral case is carried out the numerical simulation of complete machine full working scope, improve the range of operation under large discharge, polytropic efficiency and the exit static pressure power of the centrifugal blower after optimization are all improved, as shown in Figure 6, Figure 7.From Fig. 6, Fig. 7, Fig. 8, adopt after optimizing spiral case, this centrifugal blower is at 400m
3during/min operating point for design, exit static pressure power promotes 1358.1Pa, and air horsepower reduces 2.86kW, and polytropic efficiency improves 4.384%, and widened the range of operation of blower fan under large discharge operating mode, polytropic efficiency is relatively high simultaneously.
Claims (3)
1. based on an efficient centrifugal blower for computational fluid dynamics simulation, its flow passage components comprise inlet means, impeller and spiral case, and gas, from fan inlet assembly axis to entering impeller, then enters spiral case, from volute outlet out; It is characterized in that: the outer molded line of spiral case adopts spiral of Archimedes, the cross section of spiral case adopts Bezier; The outlet diameter of spiral case reduces relative to former type D250-11 centrifugal blower, the aperture of spiral case increases relative to former type D250-11 centrifugal blower, the position of snail tongue increases relative to former type D250-11 centrifugal blower, namely adopt short snail tongue, concrete size meet use computational fluid dynamics simulation to its carry out complete machine numerical simulation, separately energy spectrometer is carried out to blower fan each several part runner and optimizes and draw.
2. according to claim 1 based on the efficient centrifugal blower of computational fluid dynamics simulation, it is characterized in that: the outlet diameter of described spiral case is reduced to 447.8mm, the aperture of described spiral case is increased to 308.9mm, and the position of described snail tongue increases to the position being positioned at and departing from 28 ° with spiral case Vertical direction.
3. according to claim 2 based on the efficient centrifugal blower of computational fluid dynamics simulation, it is characterized in that: the angle in the Bezier cross section of described spiral case is 70 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520265759.2U CN204692185U (en) | 2015-04-28 | 2015-04-28 | A kind of efficient centrifugal blower based on computational fluid dynamics simulation |
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|---|---|---|---|
| CN201520265759.2U CN204692185U (en) | 2015-04-28 | 2015-04-28 | A kind of efficient centrifugal blower based on computational fluid dynamics simulation |
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| CN204692185U true CN204692185U (en) | 2015-10-07 |
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| CN201520265759.2U Withdrawn - After Issue CN204692185U (en) | 2015-04-28 | 2015-04-28 | A kind of efficient centrifugal blower based on computational fluid dynamics simulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806571A (en) * | 2015-04-28 | 2015-07-29 | 湖南科技大学 | Efficient centrifugal air blower based on computational fluid dynamic simulation |
| CN108331763A (en) * | 2018-02-27 | 2018-07-27 | 中交疏浚技术装备国家工程研究中心有限公司 | A kind of design implementation method for the durable type dredge pump improving service life |
-
2015
- 2015-04-28 CN CN201520265759.2U patent/CN204692185U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806571A (en) * | 2015-04-28 | 2015-07-29 | 湖南科技大学 | Efficient centrifugal air blower based on computational fluid dynamic simulation |
| CN104806571B (en) * | 2015-04-28 | 2017-04-05 | 湖南科技大学 | A kind of efficient centrifugal air blast based on computational fluid dynamics simulation |
| CN108331763A (en) * | 2018-02-27 | 2018-07-27 | 中交疏浚技术装备国家工程研究中心有限公司 | A kind of design implementation method for the durable type dredge pump improving service life |
| CN108331763B (en) * | 2018-02-27 | 2024-04-05 | 中交疏浚技术装备国家工程研究中心有限公司 | Design realization method of durable mud pump with prolonged service life |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151007 Effective date of abandoning: 20170405 |