CN110081185A - A kind of air-valve in ventilation and air conditioning system - Google Patents
A kind of air-valve in ventilation and air conditioning system Download PDFInfo
- Publication number
- CN110081185A CN110081185A CN201910269124.2A CN201910269124A CN110081185A CN 110081185 A CN110081185 A CN 110081185A CN 201910269124 A CN201910269124 A CN 201910269124A CN 110081185 A CN110081185 A CN 110081185A
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- Prior art keywords
- valve
- air
- curved surface
- sealing
- valve plate
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
- F16K1/2042—Special features or arrangements of the sealing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
Abstract
The present invention proposes the air-valve in a kind of ventilation and air conditioning system, including air-valve main body, positioned at the valve plate of air-valve body top, valve plate side for valve plate rotation rotation axis, connect the first sealing of air-valve main body and valve plate side simultaneously；It further include the second sealing positioned at air-valve lower body part, when valve plate turns to air-valve lower body part around rotation axis, valve plate is in sealing contact with second, and the first sealing is respectively positioned on the fluid inlet side of air-valve with the second sealing.The result shows that air-valve of the invention is fairly obvious relative to the drag reduction degree of traditional single leaf valve at different wind speed (3m/s-12m/s), and local drag reducing efficiency range is 81.4%-87.16% in identical bore.
Description
Technical field
The invention belongs to pipeline partial component resistance reduction technology fields, are related to the evaluation of ventilation and air conditioning pipeline partial component resistance,
More particularly to the wind valve structure in a kind of ventilation and air conditioning system.
Background technique
With science and technology and expanding economy, requirement of the people to living standard is higher and higher, therefore ventilation and air conditioning
System has become the indispensable a part of building, and energy consumption also increases considerably.The energy consumption of ventilation and air conditioning system
It is one of main energy consumption in building energy consumption, about accounts for the 65% of building energy consumption, and as the development of building intellectualization still has
Raised trend, wherein because caused by resistance fan energy consumption can account for 30% to the 50% of building total energy consumption, how to reduce ventage
System resistance, so that finally reducing fan energy consumption is technical problem urgently to be resolved at this stage.
Currently, in terms of to the pipelines partial component such as threeway, elbow, variable diameter drag reduction have research more, part structure this kind of to valve
The concern of part is less, and only research is also focused only in drag characteristic of the air-valve under different open states, and complete to air-valve
Drag reduction studies basic blank under open state.But air-valve is the common local resistance component in ventilation and air conditioning pipe-line system,
It is also a big component part of local resistance, it is very urgent to the research of its resistance problem.
Summary of the invention
For the defects in the prior art and insufficient, the object of the present invention is to provide the air-valves in a kind of ventilation and air conditioning system
Structure fills up the research blank of current valve partial component resistance evaluation, introduces a New Century Planned Textbook for pipeline drag reduction field, also for
The specified offer foundation of reference books and specification.
In order to achieve the above objectives, the present invention realizes that process is as follows:
A kind of air-valve in ventilation and air conditioning system, including air-valve main body, valve plate, valve plate side positioned at air-valve body top
For valve plate rotation rotation axis, connect the first sealing of air-valve main body and valve plate side simultaneously；It further include being located at air-valve master
Second sealing of body lower part, when valve plate turns to air-valve lower body part around rotation axis, valve plate is in sealing contact with second, and first
Sealing and the second sealing are respectively positioned on the fluid inlet side of air-valve；First sealing has first surface, and first surface concaves towards air-valve stream
Body entrance side；Second sealing includes second curved surface and the inclined-plane connecting with the second curved surface, and the second curved surface concaves towards air-valve main body
Lower part；Valve plate is third curved surface, and third curved surface concaves towards air-valve body interior.
Preferably, the functional expression of first surface are as follows:
(x+0.208D)2+(y+0.308D)2=(1.324D)2
The functional expression of second curved surface are as follows:
(x-0.181D)2+(y+0.165D)2=(0.245D)2
The functional expression of third curved surface are as follows:
(x-2.178D)2+(y+28.826D)2=(29.842D)2
Wherein, D is air-valve height.
It is furthermore preferred that the distance of the distance of shaft centers air-valve fluid inlet side of rotation axis is 0.2D, distance of shaft centers air-valve fluid outlet
The distance of side is D, and the distance away from air-valve fluid inlet side is 0.246D, inclined-plane and air-valve at the tie point on the second curved surface and inclined-plane
Distance away from air-valve fluid inlet side at the tie point of lower body part is 0.248D, the tie point and inclined-plane of the second curved surface and inclined-plane
Vertical range with the tie point of air-valve lower body part is 0.072D, and rotation shaft diameter is 0.048D, and D is air-valve height.
The radius of curvature of first surface is 1.324D；The radius of curvature of second curved surface is 0.245D；The curvature of third curved surface
Radius is 29.842D, and D is air-valve height.
The beneficial effects of the present invention are:
1, the invention proposes a kind of novel single leaf air-valve, by the shape to valve plate position and valve plate and sealing into
Row research, the results showed that, identical bore, air-valve of the invention is relative to traditional single leaf under different wind speed (3m/s to 12m/s)
The drag reduction degree of valve is fairly obvious, and local drag reducing efficiency range is 81.4%~87.16%, when speed is lower, and flowing is in turbulent flow
Transition region, local drag reducing efficiency increase with the increase of speed；When speed increases to certain value, flowing is at complete turbulent flow
Area, local drag reducing efficiency will no longer change with the increase of speed at this time.
2, the valve plate of the single leaf valve of tradition and axis in the duct between, increase two boundary layers, the speed ladder around boundary layer
Spend larger to keeping the energy dissipation of air-valve larger, and axis and valve plate are moved to edge by novel air valve, less boundary layer and its
The velocity gradient of surrounding, therefore the turbulence dissipation rate of novel air valve is substantially reduced, drag reducing efficiency 60.15%；
3, the valve plate of traditional air-valve and sealing is optimized in the present invention, and novel air valve reduces fluid deformation, reduces
The intensity and sphere of action of air-flow vortex, reducing mechanical energy inwardly can obtain conversion, and the turbulence dissipation rate of air-valve is substantially reduced, office
Portion's resistance coefficient is finally reduced to 0.047, and drag reducing efficiency reaches 87.11%；
4, as the variation of wind speed, the empirical value of air-valve of the present invention and the result of numerical simulation have good coincide
Property, while being also substantially reduced with other air-valves than local resistance.
Detailed description of the invention
Fig. 1 is that air-valve of the present invention opens Shi Danye valve arrangement.
Fig. 2 is that air-valve of the present invention closes Shi Danye valve arrangement.
Fig. 3 (a) is the angular marking figure of three curved surfaces of the invention, (b) is valve plate of the present invention, axis and the specific position of sealing
Set schematic diagram.
Fig. 4 is that air-valve of the present invention optimizes exemplary flow.
Fig. 5 is using the drag reducing efficiency under different wind speed.
Fig. 6 is the turbulence energy dissipative shock wave in air-valve: (a) profilograph；(b) drawing in side sectional elevation.
Fig. 7 is coefficient of partial resistance of the different air-valves in different wind speed.
Fig. 8 is the schematic diagram of several curved surfaces of the invention.
In figure: 1 is air-valve main body, and 2 be valve plate, and 3 be rotation axis, and 4 seal for first, and 5 be the second curved surface, and 6 be inclined-plane.
Specific embodiment
Embodiment 1:
The present embodiment proposes a kind of new structure of single leaf valve, and valve plate is located at air-valve body top, axle position in valve plate side,
Upper and lower two sealings are located at ipsilateral, and when air-valve is closed, valve plate position and conventional list leaf valve difference are very big, specifically, valve plate position
It is located at valve plate side, the first sealing and the second sealing in air-valve body top, rotation axis and is located at fluid inlet side, when valve plate surrounds
When rotation axis turns to air-valve lower body part, valve plate is in sealing contact with second；And air-valve proposed by the present invention, the first sealing tool
There is first surface, first surface concaves towards air-valve fluid inlet side；Second sealing includes second curved surface and connects with the second curved surface
The inclined-plane connect, the second curved surface concave towards air-valve lower body part；Valve plate is third curved surface, and third curved surface concaves towards air-valve body interior, such as
Fig. 1 (air-valve unlatching) and Fig. 2 (air-valve closing).
In general, in air-valve, there is an entrance (i.e. fluid inlet side), one outlet, a valve plate, an axis and close
Envelope.For conventional single leaf valve, valve plate is located among air-valve main body, and axle position is located at air-valve in valve plate center, sealing structure
The middle position of body top and lower part, the medium position after valve plate rotation in main body, which is formed, closes effect.The present invention is in component
On the basis of position change, to be further reduced single leaf valve resistance, air-valve and the structure of sealing are studied, such as Fig. 3, as a result
Display: the functional expression of top seal is (x+0.208D)2+(y+0.308D)2=(1.324D)2, the functional expression of lower seal is
(x-0.181D)2+(y+0.165D)2=(0.245D)2, the functional expression that valve plate follows is (x-2.178D)2+(y+28.826D)2=
(29.842D)2, wherein D is air-valve height, such as Fig. 8.
Further, such as Fig. 3, in this example:
It is furthermore preferred that the distance L1 of the distance of shaft centers air-valve fluid inlet side of rotation axis is 0.2D, distance of shaft centers air-valve fluid goes out
The distance L2 of mouthful side is D, and the distance L4 away from air-valve fluid inlet side is 0.246D, inclined-plane at the tie point on the second curved surface and inclined-plane
With at the tie point of air-valve lower body part away from air-valve fluid inlet side distance L3 be 0.248D, the connection of the second curved surface and inclined-plane
Point is 0.072D with the vertical range H of inclined-plane and the tie point of air-valve lower body part, and rotation shaft diameter D1 is 0.048D, and D is wind
Valve height.The radius of curvature R 2 of first surface is 1.324D；The radius of curvature R 3 of second curved surface is 0.245D；The song of third curved surface
Rate radius R1 is 29.842D.
Under above-mentioned scheme, more apparent drag-reduction effect, research process such as Fig. 4: first to the position of axis can be realized
It sets and is studied, determine optimal flow deflector position.As shown in Figure 4, it is contemplated that six kinds of situations of A1-A6, discovery when axis gradually to
When ducting side is mobile, coefficient of partial resistance is being gradually decreased, and the local resistance of position A6 is minimum (axis is in valve plate side), drag reduction
Rate is 60.15%.In order to guarantee the airtightness of shut-off valve, valve plate is equipped at tube wall, but this valve plate can be downstream
Space generates boundary layer, and valve plate itself can also generate velocity gradient to the inhibition of fluid.Therefore, it is necessary to baffle
Structure type optimizes.To reduce its generated resistance, the position of valve plate is optimized on the basis of A6, is obtained
When being in position B5, local resistance is minimum, drag reducing efficiency 62.71%；Valve plate is tilted simultaneously, valve plate produces the type of streamline,
C1-C5 is obtained, the local resistance of position C2 is minimum, drag reducing efficiency 65.57%；To the close of this one side of axis on the basis of C2
Envelope optimizes, and generates the sealing streamlined, and discovery local resistance decreases again, and the local resistance of position D3 is minimum, subtracts
Resistance rate reaches 61.17%；On the basis of D3, the sealing of another side is optimized, before sealing the Fang Jiayi sections of gradients and
The shape for changing the gradient makes it have streamlined, obtains shape E1-E16, and the local resistance for obtaining E4 is minimum, final optimization pass
Shape is E4, and drag reducing efficiency reaches 87.11%.
The air-valve bore of the application is 320mm × 250mm, chooses typical wind speed 7m/s, to optimization mould after optimization
The drag characteristic of type at different wind speeds carries out simulation and experimental verification.
(1) influence of the wind speed to air-valve drag reducing efficiency
Such as Fig. 5, the study found that at different wind speeds, the novel air valve drag-reduction effect of identical bore is all it is obvious that drag reduction
Range is 81.4%~87.16%, and at turbulent transition area, drag reducing efficiency is increased with the increase of wind speed, when speed reaches one
When determining degree, complete turbulent area is entered, drag reducing efficiency at this moment will be increased no longer as wind speed increases, but can be tended to steady
It is fixed.
(2) turbulence dissipation rate is analyzed
Early-stage study discovery, the local resistance of air-valve is related with energy dissipation, substantially since fluid deformation makes mechanical energy
The process for being converted to interior energy, so that the mechanical energy in exit becomes smaller.As long as the conversion for reducing or eliminating mechanical energy reaches
To the purpose of drag reduction.To single leaf valve and new type of valve in typical wind speed 7m/s, bore is that 320mm × 250mm carries out turbulent flow for this research
The analysis of dissipative shock wave has carried out the analysis of the turbulence dissipation rate in vertical section and cross section respectively as shown in Figure 6.By the vertical section (a)
Figure comparison as can be seen that single leaf valve axis, there is significant turbulence dissipation rates at valve plate and sealing, while comparing new type of valve,
Since the axis and valve plate of new type of valve have moved on to the turbulent dissipation disappearance for making original middle part on one side close to pipeline, there are also to sealing
Impart it is streamlined so that sealing rear turbulent dissipation have apparent reduction.The list it can be seen from (b) drawing in side sectional elevation again
The turbulent dissipation of the right and left of leaf valve is more apparent, and the turbulent dissipation of the right and left of new type of valve is substantially reduced.So can see
The turbulent dissipation that air-valve can be effectively reduced by the novel air valve that optimization obtains out, reaches the mesh for reducing its local resistance
's.
(3) full-scale experiment verifying analysis
To verify the drag-reduction effect of the application novel air valve at different wind speeds, the application is surveyed respectively using full-scale experiment
The coefficient of partial resistance of novel air valve after having measured single leaf valve and its optimization, and compared with other valves.Full-scale experiment
In, the material of air hose is galvanized iron sheet.Experimental system includes centrifugal blower, connecting hose, plenum chamber, turbulence plate, bore 320mm
The rectangular air duct of × 250mm, the air-valve of test, 1 regulating valve.Blower and air hose are connected with connecting hose, air hose and air hose and
Connection using flanged joint and carries out encapsulation process between air hose and air-valve.Peace turns plenum chamber and turbulent flow at four meters of blower
Plate stablizes the vibration that the air-flow in pipeline reduces air-flow, keeps the effect of air-supply more ideal, and guarantee the gas before entering air-valve
Stream is fully developed flow, it is ensured that experiment is more accurate.It is experimentally confirmed air-valve coefficient of partial resistance and the variation with wind speed,
The result of experiment value and numerical simulation has good identical property.It can be proved that novel air valve drag-reduction effect in practical applications
Fairly obvious, effect is better than other wind valve structures.
Claims (4)
1. the air-valve in a kind of ventilation and air conditioning system, including air-valve main body (1), which is characterized in that further include being located at air-valve main body
(1) valve plate (2) on top, valve plate (2) side for valve plate (2) rotation rotation axis (3), simultaneously connect air-valve main body (1)
(4) are sealed with the first of valve plate (2) side；
It further include the second sealing positioned at air-valve main body (1) lower part, when valve plate (2) turn to air-valve main body around rotation axis (3)
(1) when lower part, valve plate (2) and second in sealing contact, the first sealing (4) and second seals the fluid inlet side for being respectively positioned on air-valve；
First sealing (4) has first surface, and first surface concaves towards air-valve fluid inlet side；
Second sealing includes second curved surface (5) and the inclined-plane (6) connecting with the second curved surface (5), and the second curved surface (5) concaves towards wind
Valve body (1) lower part；
Valve plate (2) is third curved surface, and it is internal that third curved surface concaves towards air-valve main body (1).
2. air-valve as described in claim 1, which is characterized in that the functional expression of first surface are as follows:
(x+0.208D)2+(y+0.308D)2=(1.324D)2
The functional expression of second curved surface are as follows:
(x-0.181D)2+(y+0.165D)2=(0.245D)2
The functional expression of third curved surface are as follows:
(x-2.178D)2+(y+28.826D)2=(29.842D)2
Wherein, D is air-valve height.
3. air-valve as described in claim 1, which is characterized in that the distance of the distance of shaft centers air-valve fluid inlet side of rotation axis (3) is
0.2D, the distance of distance of shaft centers air-valve fluid outlet side are D, are entered at the tie point of the second curved surface (5) and inclined-plane (6) away from air-valve fluid
The distance of mouthful side is 0.246D, and inclined-plane (6) are at the tie point of air-valve main body (1) lower part away from being at a distance from air-valve fluid inlet side
0.248D, the tie points of the second curved surface (5) and inclined-plane (6) and inclined-plane (6) it is vertical with the tie point of air-valve main body (1) lower part away from
From for 0.072D, rotation axis (3) diameter is 0.048D, and D is air-valve height.
4. air-valve as described in claim 1, which is characterized in that the radius of curvature of first surface is 1.324D；Second curved surface (5)
Radius of curvature is 0.245D；The radius of curvature of third curved surface is 29.842D, and D is air-valve height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910269124.2A CN110081185B (en) | 2019-04-04 | 2019-04-04 | Air valve in ventilation air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910269124.2A CN110081185B (en) | 2019-04-04 | 2019-04-04 | Air valve in ventilation air-conditioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110081185A true CN110081185A (en) | 2019-08-02 |
| CN110081185B CN110081185B (en) | 2021-01-08 |
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ID=67414318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910269124.2A Active CN110081185B (en) | 2019-04-04 | 2019-04-04 | Air valve in ventilation air-conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110081185B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5618026A (en) * | 1995-02-13 | 1997-04-08 | General Signal Corporation | Hybrid rotary control valve assembly |
| CN203703305U (en) * | 2014-01-23 | 2014-07-09 | 章华 | Valve deck structure of low-flow-resistance check valve |
| CN205654885U (en) * | 2016-04-20 | 2016-10-19 | 江苏特一机械股份有限公司 | Three pole valves |
-
2019
- 2019-04-04 CN CN201910269124.2A patent/CN110081185B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5618026A (en) * | 1995-02-13 | 1997-04-08 | General Signal Corporation | Hybrid rotary control valve assembly |
| CN203703305U (en) * | 2014-01-23 | 2014-07-09 | 章华 | Valve deck structure of low-flow-resistance check valve |
| CN205654885U (en) * | 2016-04-20 | 2016-10-19 | 江苏特一机械股份有限公司 | Three pole valves |
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| Publication number | Publication date |
|---|---|
| CN110081185B (en) | 2021-01-08 |
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