CN107989831B - Blower collector design method and blower - Google Patents
Blower collector design method and blower Download PDFInfo
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- CN107989831B CN107989831B CN201711171205.6A CN201711171205A CN107989831B CN 107989831 B CN107989831 B CN 107989831B CN 201711171205 A CN201711171205 A CN 201711171205A CN 107989831 B CN107989831 B CN 107989831B
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- inlet
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- collector
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention provides a kind of blower collector design method and blowers, belong to centrifugal fan field.The above method mainly comprises the steps that a. determines the first reference line and the second reference line；B. inlet angle and exit angle are determined.Finally make the inlet angle more than or equal to 0 ° and less than or equal to 30 °, the angle of outlet is more than or equal to -20 ° and is less than or equal to 20 °.It by the rational design to inlet angle and the angle of outlet, improves in collector and the air flow condition of impeller eye, avoids curved wall surface current and move segregation phenomenon to reduce flow losses, finally improve the efficiency of whole Fans.The obtained collector of the above method is mainly utilized in above-mentioned blower, to improve the efficiency of blower.
Description
Technical field
The present invention relates to centrifugal fan fields, in particular to a kind of blower collector design method and blower.
Background technique
Blower at work, air-flow by blower axially into blade space, then in the driving further aspect of impeller with leaf
Wheel rotation；On the other hand energy is improved under the action of inertia, leave impeller along radial direction, do work by the centrifugal force of generation
Blower be known as centrifugal fan.
Air-flow is flowed into the process of impeller by inlet box, is that the main flow direction of an air-flow axially returns again to diameter by radial go to
To process.And collector is between inlet box and impeller, effect is that upstream airflow is made evenly and smoothly to import impeller, is risen
To the effect formed a connecting link.Therefore the shape of collector needs well-designed, to improve fan operation efficiency.
Therefore it provides a kind of blower collector design method and blower, this has the development of blower important
Meaning.
Summary of the invention
The purpose of the present invention is to provide a kind of blower collector design method and blowers, can be improved the operation of blower
Efficiency.
A kind of blower collector design method, the described method comprises the following steps:
A. the first reference line is determined；The axial slices of the blower and shared side plate are crossed to form the first reference line, described
Side plate is shared as the side plate that shares with the matched inlet box of the collector and spiral case；
B. the size of inlet angle is determined；
The middle part of the collector includes through-hole, for being connected to the inlet box and the spiral case, the axis of the collector
Determine that the molded line of the through-hole, collector axis described in the type wound are rotated by 360 ° to form the through-hole to section；
The molded line of the through-hole is entrance molded line close to one section of the through-hole inlet side, and the entrance molded line is straight
The tangent line of line or curve, the entrance molded line or the entrance molded line and the angle of first reference line are inlet angle；
The inlet angle is more than or equal to 0 ° and is less than or equal to 30 °；
C. the second reference line is determined；It include shroud air inlet hole, institute in the middle part of the shroud cooperated with the air outlet of the collector
The axial slices for stating shroud determine that the molded line of the shroud air inlet hole, the molded line of the shroud air inlet hole are straight line or curve, institute
The molded line or its tangent line for stating shroud air inlet hole determine the second reference line；
D. the size of the angle of outlet is determined；
The molded line of the through-hole is outlet section molded line close to one section of the through-hole air side, and the outlet section molded line is straight
Line or curve, the outlet section molded line with or the angle of its tangent line and second reference line be the angle of outlet；
The angle of outlet is more than or equal to -20 ° and is less than or equal to 20 °.
Further,
The method also includes the inlet angles and exit angle when solution efficiency highest；Specifically:
Inlet angle is listed with exit angle first and to form multiple data and combines,
Then using the method for Fluid Mechanics Computation to the efficiency that finally generates of each group of data in data combination into
Row solves；
Finally select data combination when efficiency highest.
Further,
The entrance molded line connect the molded line to form through-hole with the outlet section molded line by straight line or curve.
Further,
The inlet angle is more than or equal to 0 ° and is less than or equal to 20 °.
Further,
The inlet angle is 15 °.
Further,
The angle of outlet is more than or equal to -15 ° and is less than or equal to 15 °.
Further,
The angle of outlet is equal to 15 °.
Further,
The inlet angle is more than or equal to 0 ° and less than or equal to 15 °, and the angle of outlet is more than or equal to 0 ° and is less than or equal to 15 °.
Further,
The inlet angle is 15 °, and the angle of outlet is 15 °.
A kind of blower, the blower include spiral case, blower collector design method institute described in two inlet boxes and two
The collector of design；
The inlet box is connected to the two sides of the spiral case, and the collector is arranged between inlet box and the spiral case,
For will be in the wind water conservancy diversion to the spiral case in the inlet box.
The beneficial effects of the present invention are:
The blower collector design method and blower that the present invention obtains by above-mentioned design, by inlet angle and the angle of outlet
Rational design, improve in collector and the air flow condition of impeller eye, avoid curved wall surface current and move segregation phenomenon to subtract
Lack flow losses, finally improves the efficiency of whole Fans.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram after the blower subdivision that embodiment of the present invention provides；
Fig. 2 is the schematic diagram of collector molded line, the first reference line and the second reference line that embodiment of the present invention provides；
Fig. 3 is the signal of collector molded line, the first reference line and the second reference line that embodiment of the present invention provides；
Fig. 4 is the structural schematic diagram for the collector that embodiment of the present invention provides.
Icon: 100- blower；110- inlet box；112- shares side plate；120- collector；130- spiral case；140- impeller turns
Subgroup；142- shroud.
Specific embodiment
To keep the purposes, technical schemes and advantages of embodiment of the present invention clearer, implement below in conjunction with the present invention
The technical solution in embodiment of the present invention is clearly and completely described in attached drawing in mode, it is clear that described reality
The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below to protect
The scope of the present invention of shield, but it is merely representative of selected embodiment of the invention.Based on the embodiment in the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
In the description of the present invention, it is to be understood that, indicating position or the term of positional relationship are based on shown in attached drawing
Orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than the equipment of indication or suggestion meaning
Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be on or below second feature
Directly contacted including the first and second features, also may include the first and second features be not direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature second spy
Right above sign and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature second feature it
Under, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of first feature horizontal height
Less than second feature.
Embodiment 1:
A kind of blower collector design method is present embodiments provided, is mainly used to design the collector on blower 100
120.For the ease of the above method is described in detail, the first basic structure to centrifugal blower 100 and collector 120 below
Effect is simply introduced.
Such as Fig. 1, F formula is driven 100 structural schematic diagram of double suction centrifugal blower in Fig. 1, is mainly turned by collector 120, impeller
The components such as subgroup 140, inlet box 110 and spiral case 130 composition.In use, vane rotor group rotates and leads to the gas in impeller
Cross discharge pipe discharge, after generating negative pressure in impeller, gas by inlet box 110 be introduced into collector 120 and further to
In impeller, air-flow is flowed into the process of impeller by inlet box, is that the main flow direction of an air-flow axially returns again to diameter by radial go to
To process.And collector 120 is between inlet box and impeller, effect is that upstream airflow is made evenly and smoothly to import leaf
Wheel, plays the role of forming a connecting link.Therefore the shape of collector 120 needs well-designed, to guarantee that it is good that impeller eye has
Air flow condition, to improve 100 operational efficiency of blower.
In Fig. 1, vane rotor group includes two shrouds 142 and mid-game, is provided with air inlet hole, air inlet hole in the middle part of shroud 142
Cooperate with the outlet side of the through-hole at 120 middle part of collector and assembles.Centrifugal blower 100 is entered for single suction, vane rotor group only includes
One shroud 142.
The design method of collector 120 mainly comprises the steps that in the present embodiment
A. as shown in Figure 1, Figure 2 and Fig. 3, determines the first reference line；The axial slices of the blower 100 and shared 112 phase of side plate
It hands over and forms the first reference line, the shared side plate 112 is is total to the matched inlet box 110 of the collector 120 and spiral case 130
Side plate.Inlet box 110 is connect with spiral case 130, and spiral case 130 and inlet box 110 share one block of side plate.
B. the size of inlet angle is determined.Collector 120 is the revolving body that middle part is provided with through-hole, and through-hole is described for being connected to
Inlet box 110 and the spiral case 130.
The axial slices of the collector 120 determine the molded line of the through-hole, a certain solid described in the type wound of the through-hole
Dead axle line is rotated by 360 ° to form the through-hole.
The molded line of the through-hole is entrance molded line close to one section of the through-hole inlet side, and the entrance molded line is straight
The tangent line of line or curve, the entrance molded line or the entrance molded line and the angle of first reference line are inlet angle；
The inlet angle is more than or equal to 0 ° and is less than or equal to 30 °.
C. the second reference line is determined.The middle part of the shroud 142 includes 142 air inlet hole of shroud, the axial direction of the shroud 142
Section determines that the molded line of 142 air inlet hole of shroud, the molded line of 142 air inlet hole of shroud are straight line or curve, the shroud
The molded line of 142 air inlet holes or its tangent line determine the second reference line；
D. the size of the angle of outlet is determined；
The molded line of the through-hole is outlet section molded line close to one section of the through-hole air side on collector 120, it is described go out
Mouthful segment type line is straight line or curve, the outlet section molded line with or the angle of its tangent line and second reference line be the angle of outlet；
The angle of outlet is more than or equal to -20 ° and is less than or equal to 20 °.
Further, inlet angle and exit angle when the above method further includes solution efficiency highest；Specifically:
Inlet angle is listed with exit angle first and to form multiple data and combines,
Then using the method for Fluid Mechanics Computation to the efficiency that finally generates of each group of data in data combination into
Row solves；
Finally select data combination when efficiency highest.
Further, the functional relation of efficiency and inlet angle, exit angle is found out using the method for curve matching；Finally ask
The maximum value of solution function and corresponding inlet angle and exit angle.
After inlet angle and exit angle are determined, entrance molded line and outlet section molded line can determine therewith, pass through
Curve or straight line connect entrance molded line and outlet section molded line to form the molded line of collector through-hole after, by through-hole molded line to
The certain wall thickness of outer offset forms the outer profile molded line of collector, and through-hole molded line, that is, outer profile molded line connection closure is revolved around axis
Entire collector can be formed by turning 360 °.
In other embodiments, through-hole outer profile molded line can also be determined according to fitted position, and be not limited to above-mentioned
The mode of offset.
According to hydromechanical basic theories, when the two places to communicate with each other are there are when static pressure difference, fluid can be generated by high pressure
Area flows to the trend of low-pressure area movement.And reacting fluid flowing kinetic energy dynamic pressure (0 or positive value) and fluid static pressure be can
With what is mutually converted.Flow boundary shelf theory points out that the fluid for contacting wall surface flows, and wall surface fluid flow rate is 0, near wall
There are a flow velocitys to prolong the region that wall surface normal direction is gradually increased, i.e. flow boundary layer.
So when in process fluid flow, in the case where no external interference and additional force act on, the drop of flowing velocity
Low (dynamic pressure decline), it is meant that the raising of static pressure.Under certain conditions, locally there is dynamic pressure and gradually decays near wall fluid
0, script flow direction static pressure increases at this time, just will appear inverse pressure (static pressure) gradient.Partial fluid starts under hydrostatic driving
It now flows back, local fluid flow direction and main flow direction are on the contrary, i.e. flow separation phenomenon.The appearance of this phenomenon will cause need not
The flow losses wanted, while intake uniformity is influenced, and then reduce pneumatic efficiency.
Such as Fig. 4, the principle and technical effect of the design method of the present embodiment body are illustrated.Design using arc and
When boring arc collector 120, need to consider that adverse pressure gradient causes flow separation at this time.When air-flow enters collector 120 and along afflux
When 120 flow further downstream of device, Fluid pressure can change with flow direction.
In Fig. 4, the AB section of collector 120 is converging portion, and for external potential barrier, the flowing of this part is to accelerate
(dynamic pressure increase, static pressure reduce), (B point) flow velocity reaches maximum value, static pressure reaches minimum at minimum point at the convergence
Value.That is A to B is positive pressure gradient, therefore the resultant force for acting on pressure on fluid particle in boundary layer is consistent with flow direction, it with
The dynamic viscous effects of boundary layer internal resistance viscous flow play opposite effect.It has crossed after B point, fluid is to slow down, at this time by inverse pressure
The influence of gradient.The speed of fluid particle is gradually reduced in boundary layer, is proximate to the fluid particle of wall surface first in some position
Upper speed is reduced to zero, and the flowing by near wall actually becomes reflux or adverse current, and curved wall surface current occurs and moves segregation phenomenon.In order to
It avoids that this phenomenon occurs, the design of 120 molded line of collector is most important.
The 120 angle design value of collector recommended using the design method in the present invention, can reduce collector 120 itself
Loss, avoid the collector designed 120 flow separation phenomenon occur to greatest extent, make collector 120 flow out gas
Impeller is uniformly entered, 100 complete machine aeroperformance of blower is promoted.
In other embodiments, inlet angle can be 0 °, 15 ° or 20 °；The angle of outlet can be -15 °, 0 ° or 15 °.In addition,
Relative to the first reference line, it is positive-angle when inlet angle deflects counterclockwise, is deflected to negative angle clockwise；Relative to the second reference
Line is positive-angle when the angle of outlet deflects counterclockwise, is deflected to negative angle clockwise.
Embodiment 2:
A kind of blower 100 is provided in the present embodiment, blower 100 includes 130, two inlet boxes 110 of spiral case and two benefits
The collector 120 obtained with design method in embodiment 1；Inlet box 110 is connected to the two sides of spiral case 130, and collector 120 is arranged
Between inlet box 110 and spiral case 130, for will be in the wind water conservancy diversion to spiral case 130 in inlet box.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of blower collector design method, which is characterized in that the described method comprises the following steps:
A. the first reference line is determined；The axial slices of the blower and shared side plate are crossed to form the first reference line, described to share
Side plate is the side plate that shares with the matched inlet box of the collector and spiral case；
B. the size of inlet angle is determined；
The middle part of the collector includes through-hole, and for being connected to the inlet box and the spiral case, the axial direction of the collector is cut
Face determines that the molded line of the through-hole, collector axis described in the type wound are rotated by 360 ° to form the through-hole；
The molded line of the through-hole is entrance molded line close to one section of the through-hole inlet side, the entrance molded line be straight line or
The tangent line of curve, the entrance molded line or the entrance molded line and the angle of first reference line are inlet angle；
The inlet angle is more than or equal to 0 ° and is less than or equal to 30 °；
C. the second reference line is determined；It include shroud air inlet hole in the middle part of the shroud cooperated with the air outlet of the collector, before described
The axial slices of disk determine the molded line of the shroud air inlet hole, and the molded line of the shroud air inlet hole is straight line or curve, before described
The molded line of disk air inlet hole or its tangent line determine the second reference line；
D. the size of the angle of outlet is determined；
The molded line of the through-hole is outlet section molded line close to one section of the through-hole air side, the outlet section molded line be straight line or
The angle of curve, the outlet section molded line or its tangent line and second reference line is the angle of outlet；
The angle of outlet is more than or equal to -20 ° and is less than or equal to 20 °.
2. blower collector design method according to claim 1, which is characterized in that the method also includes solution efficiencies
Inlet angle and exit angle when highest；Specifically:
Inlet angle is listed with exit angle first and to form multiple data and combines,
Then it is asked using the efficiency that the method for Fluid Mechanics Computation finally generates each group of data in data combination
Solution；
And the functional relation of efficiency and inlet angle, exit angle is found out using the method for curve matching；Finally solve function
Maximum value and corresponding inlet angle and exit angle.
3. blower collector design method according to claim 1, which is characterized in that the entrance molded line and it is described go out
Mouth segment type line connects the molded line to form through-hole by straight line or curve.
4. blower collector design method according to claim 1, which is characterized in that the inlet angle be more than or equal to 0 ° and
Less than or equal to 20 °.
5. blower collector design method according to claim 1, which is characterized in that the inlet angle is 15 °.
6. blower collector design method according to claim 1, which is characterized in that the angle of outlet is more than or equal to -15 °
And it is less than or equal to 15 °.
7. blower collector design method according to claim 1, which is characterized in that the angle of outlet is equal to 15 °.
8. blower collector design method according to claim 1, which is characterized in that the inlet angle be more than or equal to 0 ° and
Less than or equal to 15 °, the angle of outlet is more than or equal to 0 ° and is less than or equal to 15 °.
9. blower collector design method according to claim 1, which is characterized in that the inlet angle be 15 °, it is described go out
Bicker is 15 °.
10. a kind of blower, which is characterized in that the blower includes spiral case, two inlet boxes and two utilization claims 1 to 9
Collector designed by described in any item blower collector design methods；
The inlet box is connected to the two sides of the spiral case, and the collector is arranged between inlet box and the spiral case, is used for
It will be in the wind water conservancy diversion to the spiral case in the inlet box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711171205.6A CN107989831B (en) | 2017-11-21 | 2017-11-21 | Blower collector design method and blower |
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| CN201711171205.6A CN107989831B (en) | 2017-11-21 | 2017-11-21 | Blower collector design method and blower |
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| CN107989831A CN107989831A (en) | 2018-05-04 |
| CN107989831B true CN107989831B (en) | 2019-05-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109595196B (en) * | 2018-10-11 | 2020-07-28 | 西安理工大学 | Design method of bionic current collector for centrifugal fan impeller |
| CN112628205B (en) * | 2021-01-13 | 2021-07-27 | 华中科技大学 | Centrifugal fan collector of double-arc molded line |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5827044A (en) * | 1997-03-26 | 1998-10-27 | Yazici; Muammer | Fan system with variable air volume control |
| CN202187958U (en) * | 2011-07-19 | 2012-04-11 | 平安电气股份有限公司 | Mineral air blower collector |
| CN204476870U (en) * | 2015-01-27 | 2015-07-15 | 浙江理工大学 | A kind of centrifugal blower slip ring |
| CN205714964U (en) * | 2016-04-07 | 2016-11-23 | 龙岩市万隆机械有限公司 | A kind of rectifier type air-introduced machine |
| CN107327421B (en) * | 2017-08-22 | 2019-07-30 | 重庆通用工业(集团)有限责任公司 | A kind of blower and defeated wind devices |
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