CN109386650A - A kind of valve noise optimization method - Google Patents
A kind of valve noise optimization method Download PDFInfo
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- CN109386650A CN109386650A CN201811214922.7A CN201811214922A CN109386650A CN 109386650 A CN109386650 A CN 109386650A CN 201811214922 A CN201811214922 A CN 201811214922A CN 109386650 A CN109386650 A CN 109386650A
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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Abstract
The invention proposes a kind of valve noise optimization methods, belong to valve noise optimisation technique field.The method, as solver, carries out fluid to gate valve, shut-off valve, ball valve, regulating valve and flow straightener respectively and calculation of Acoustic Characteristics obtains the fluid and acoustic characteristic calculated result of the gate valve, shut-off valve, ball valve, regulating valve and flow straightener by using FLUENT；The noise characteristic of the valve is determined according to the fluid of the gate valve, shut-off valve, ball valve, regulating valve and flow straightener and acoustic characteristic calculated result, and then realizes valve noise optimization.
Description
Technical field
The present invention relates to a kind of valve noise optimization methods, belong to valve noise optimisation technique field.
Background technique
Fluid-duct-system is mainly made of the part such as pipeline, pump, valve, bracket, when fluid passes through valve, stream
Fierce variation occurs for dynamic situation, and due to the throttling action of valve plate, fluid intensely puddling, impact before and after valve are pressed simultaneously
Power also has violent variation.It is explained from fluid dynamics viewpoint, fluid pressure potential with higher before valve passes through valve
When, fluid accelerates, and potential energy is made to be changed into kinetic energy；Some energy conversion is sound energy simultaneously, is radiated in the form of noise.
This noise is propagated along pipe-line system, and it is horizontal to influence the flow noise of downstream or even pipe outlet out.
Summary of the invention
The present invention proposes a kind of valve to solve the problems, such as to lack valve noise optimization method in the prior art
Door noise optimization method, the technical solution taken are as follows:
A kind of valve noise optimization method, which comprises
Step 1: using FLUENT as solver, in gate valve Parallel gate valve Parallel slide valve and Wedge Gate Valves flow respectively
Body and calculation of Acoustic Characteristics obtain the fluid and acoustic characteristic calculated result of the Parallel gate valve Parallel slide valve and Wedge Gate Valves difference；According to
The Parallel gate valve Parallel slide valve and Wedge Gate Valves fluid respectively and acoustic characteristic calculated result determine the noise characteristic of the gate valve；
Step 2: using FLUENT as solver, to the straight-through stop valve and Oblique Stop Valves point in shut-off valve
Not carry out fluid and calculation of Acoustic Characteristics obtain the fluid and acoustic characteristic calculated result of the shut-off valve；According to the through type
The fluid and acoustic characteristic calculated result of shut-off valve and Oblique Stop Valves determine the noise characteristic of the shut-off valve；
Step 3: using FLUENT as solver, fluid is carried out to the ball valve under different opening and acoustic characteristic carries out
Calculate and obtain the fluid and acoustic characteristic calculated result of the ball valve；According to the fluid harmony of the ball valve under the different opening
Learn the noise characteristic that characteristic calculated result determines the ball valve；
Step 4: using FLUENT as solver, fluid and acoustic characteristic meter are carried out to the regulating valve under different opening
Calculate the fluid and acoustic characteristic calculated result for obtaining regulating valve under the different opening；According to the regulating valve under the different opening
Fluid and acoustic characteristic calculated result determine the noise characteristic of the regulating valve；
Step 5: using FLUENT as solver, fluid and acoustics are carried out to the flow straightener for being mounted on shut-off valve downstream
Characteristic calculates, and obtains the fluid and acoustic characteristic calculated result of the flow straightener；It is special according to the fluid of the flow straightener and acoustics
Property calculated result determines the noise characteristic of the flow straightener；
Step 6: the noise in conjunction with the noise characteristic of the gate valve, the noise characteristic of the shut-off valve, the ball valve is special
The noise characteristic of property, the noise characteristic of the regulating valve and the flow straightener determines valve noise prioritization scheme.
Further, the acquisition process of the noise characteristic of gate valve described in step 1 includes:
Step 1: establishing Parallel gate valve Parallel slide valve calculates domain model, and boundary setting is carried out to the FLUENT, using FLUENT
As solver, fluid and calculation of Acoustic Characteristics are carried out for the Parallel gate valve Parallel slide valve that nominal dimension is DN125, obtains run-in index lock
The fluid and acoustic characteristic calculated result of valve；
Step 2: generating the centre of Parallel gate valve Parallel slide valve according to the fluid of the Parallel gate valve Parallel slide valve and acoustic characteristic calculated result
Section speed vector figure, pressure-plotting and noise profile figure；In conjunction with the intermediate cross-section speed vector figure, pressure-plotting and
The noise profile situation of Parallel gate valve Parallel slide valve described in noise profile figure is analyzed, and the noise characteristic of the Parallel gate valve Parallel slide valve is obtained；
Step 3: establishing Wedge Gate Valves calculates domain model, and boundary setting is carried out to the FLUENT, is made using FLUENT
For solver, fluid and calculation of Acoustic Characteristics are carried out for the Wedge Gate Valves that nominal dimension is DN125, obtains the stream of Wedge Gate Valves
Body and acoustic characteristic calculated result；
Step 4: determining Wedge Gate Valves 40% and 85% according to the fluid of the Wedge Gate Valves and acoustic characteristic calculated result
Flow Field Distribution situation under aperture is divided according to noise profile situation of the process distribution situation to the Wedge Gate Valves
Analysis, and obtain the noise characteristic of the Wedge Gate Valves.
Step 5: obtaining the lock in conjunction with the noise characteristic of the Parallel gate valve Parallel slide valve and the noise characteristic of the Wedge Gate Valves
The noise characteristic of valve.
Further, the process of the noise characteristic acquisition of shut-off valve described in step 2 includes:
Step 1: it establishes straight-through stop valve and calculates domain model, the boundary condition of the FLUENT is set；Using FLUENT
As solver, fluid and calculation of Acoustic Characteristics are carried out for the straight-through stop valve of different nominal diameters, it is straight to obtain each nominal
The fluid and acoustic characteristic calculated result of the straight-through stop valve difference flow direction of diameter；
Step 2: it is obtained according to the fluid of the straight-through stop valve difference of each nominal diameter flow direction and acoustic characteristic calculated result
Flow field and the noise profile situation of the straight-through stop valve of each nominal diameter are taken, and in conjunction with the flow field and noise profile feelings
Condition analyzes the noise situations of the straight-through stop valve, obtains the noise characteristic of the straight-through stop valve；
Step 3: it establishes Oblique Stop Valves and calculates domain model, the boundary condition of the FLUENT is set；Using FLUENT
As solver, fluid and calculation of Acoustic Characteristics are carried out for the Oblique Stop Valves of different nominal diameters, it is straight to obtain each nominal
The fluid and acoustic characteristic calculated result of the straight-through stop valve difference flow direction of diameter；
Step 4: it is obtained according to the fluid of the straight-through stop valve difference of each nominal diameter flow direction and acoustic characteristic calculated result
Flow field and the distribution of sound field of the straight-through stop valve of each nominal diameter are taken, and in conjunction with the flow field and sound-filed simulation feelings
Condition analyzes the noise situations of the Oblique Stop Valves, obtains the noise characteristic of the Oblique Stop Valves；
Step 5: it is obtained in conjunction with the noise characteristic of the straight-through stop valve and the noise characteristic of the Oblique Stop Valves
The noise characteristic of the shut-off valve.
Further, the acquisition process of the noise characteristic of the ball valve described in step 3 includes:
Step 1: establishing ball valve and calculate domain model, the boundary condition of the FLUENT is set；
Step 2: using FLUENT as solver respectively to the flow field under ball valve 35%, 55%, 65% and 75% aperture
Steady state values are calculated, and the steady state values calculated result of the ball valve is obtained, wherein the aperture with ball valve port axes and
The complementary angle of pipeline runner axis angle is standard, and in solver calculating process, inlet and outlet condition takes pressure entrance respectively
And pressure export, pressure drop take 0.05MPa；
Step 3: the spherome surface pressure under 55% and 75% aperture is obtained according to the steady state values calculated result of the ball valve
Power distribution, streamline distribution and surface noise distribution situation；
Step 4: determining the ball in conjunction with spherome surface pressure distribution, streamline distribution and surface noise distribution situation
The noise characteristic of valve.
Further, the noise characteristic acquisition process of the regulating valve includes:
Step a: it establishes regulating valve and calculates domain model, the boundary condition of the FLUENT is set；
Step b: FLUENT is used to carry out flow field to aperture as solver for 20%, 40% and 60% regulating valve
With the calculating of acoustic characteristic, flow field and the acoustic characteristic calculated result of the regulating valve are obtained；
Step c: the institute under 20% and 60% aperture is obtained according to the flow field of the regulating valve and acoustic characteristic calculated result
State the streamline distributions, the neighbouring pressure distribution situation of valve chamber and surface noise distribution situation of regulating valve；
Step d: according to pressure distribution situation near the streamline distributions of the regulating valve, valve chamber and surface noise point
Cloth situation determines the noise characteristic of the regulating valve.
Further, the acquisition process of the noise characteristic of flow straightener described in step 5 includes:
A step: establishing flow straightener and calculate domain model and flow straightener optimization straight-through stop valve model, described in setting
The boundary condition of FLUENT；
B step: carrying out flow field situation with straight-through stop valve to the flow straightener optimization of not set flow straightener and acoustics calculate,
Obtain noise characteristic basic data；
C step: the current stabilization for being respectively D125 with nominal dimension for rectangular honeycomb formula flow straightener and concentric-ring pattern flow straightener
Device optimization cooperated with straight-through stop valve after flow field situation and acoustic characteristic carry out simulation calculating, meanwhile, for rectangular honeycomb
Formula flow straightener, concentric-ring pattern flow straightener and with blocked center partial concentric round type flow straightener respectively with nominal dimension be D250 it is steady
It flows the flow field situation after device optimization is cooperated with straight-through stop valve and acoustic characteristic carries out simulation calculating, obtain flow straightener and stream device
Optimization straight-through stop valve cooperate after flow field and acoustics performance data；
D step: matched according to the noise characteristic basic data and the flow straightener with stream device optimization straight-through stop valve
The comparison in flow field and acoustics performance data after conjunction, determines influence of the flow straightener to straight-through stop valve flow field and noise characteristic；
E step: circular arc is connected using the pump housing in simulated flow pattern after impeller X and spiral case A scaling, and in the inlet of the pump housing
Radius is the bend pipe of 1/2 caliber, carries out pressure distribution to the pump housing and surface noise distribution calculates, obtain pump housing flow field and make an uproar
Sound characteristics basic data；
F step: rectangular honeycomb formula flow straightener, concentric-ring pattern flow straightener are respectively set on the pump housing and with blocked center part
Concentric-ring pattern flow straightener, and the flow field and noise characteristic of the pump housing being provided under all kinds of flow straighteners are calculated, obtain current stabilization
Flow field and noise characteristic data after device and pump housing cooperation；
G step: by flow field and noise after the pump housing flow field and noise characteristic basic data and the cooperation of flow straightener and the pump housing
Performance data compares, and obtains influence of the flow straightener to pump housing flow field and noise characteristic；The flow straightener is to through type
The influence in the flow field and noise characteristic of shut-off valve flow field and the pump housing is the noise characteristic of the flow straightener；
Wherein, the valve flowing channel model of the flow straightener optimization straight-through stop valve ends with through type described in step 2
The valve flowing channel model of valve is not identical.
The invention has the advantages that:
A kind of valve noise optimization method proposed by the present invention can be to valve types such as gate valve, shut-off valve, ball valve, regulating valves
The mobility status and noise level of type carry out overall merit, and different knots are arranged in valve-pipe-line system according to noise level
The flow straightener of structure weakens the pressure fluctuation of valve downstream, so that the flow noise for reducing entire pipe-line system is horizontal.
Detailed description of the invention
Fig. 1 is Parallel gate valve Parallel slide valve calculated result (flow direction right-to-left), wherein (a) is intermediate cross-section velocity vector
Figure (b) is pressure-plotting；It (c) is noise profile figure.
Fig. 2 is the flow field schematic diagram under the aperture of DN125 Wedge Gate Valves part, wherein (a) is near 40% aperture lower flashboard
Pressure-plotting is (b) streamline distribution map under 40% aperture；(c) it is pressure-plotting near 85% aperture lower flashboard, (d) is
Streamline distribution map under 85% aperture.
Fig. 3 is the noise profile figure under the aperture of DN125 Wedge Gate Valves part, wherein (a) is 40% aperture lower surface noise
Distribution map (b) is 85% aperture lower surface noise profile figure.
Fig. 4 be straight-through stop valve difference flow to schematic diagram of calculation result, wherein (a) be DN125 shut-off valve flow field and
Noise profile figure；It (b) is the flow field of DN200 shut-off valve and noise profile figure.
Fig. 5 is that shut-off valve difference flows to 60dB or more noise profile administrative division map, wherein (a) is DN125 shut-off valve figure；(b)
For DN125 shut-off valve.
Fig. 6 is DN125 straight-through stop valve reverse direction flow schematic diagram of calculation result, wherein (a) is flow field and sound-filed simulation
Figure；It (b) is surface noise 60dB area above figure.
Fig. 7 is Oblique Stop Valves schematic diagram of calculation result, wherein (a) is the flow field harmony of DN125 Oblique Stop Valves
Field pattern；It (b) is the flow field harmony field pattern of DN125 Oblique Stop Valves opposite course (being flowed into above flap)；(c)
The flow field of DN200 Oblique Stop Valves and sound-filed simulation.
Fig. 8 is Oblique Stop Valves surface noise 60dB area above figure, wherein (a) is DN125 shut-off valve；(b) it is
DN200 shut-off valve.
Fig. 9 is the flow field schematic diagram under the aperture of DN125 ball valve part, wherein pressure near sphere when (a) is aperture 75%
Distribution map, (b) streamline distribution figure when being aperture 75%, (c) sphere neighbouring pressure-plotting when being aperture 55%, (d) to open
Streamline distribution figure when spending 55%.
Figure 10 is noise profile schematic diagram under the aperture of DN125 ball valve part, wherein surface noise when (a) is aperture 75%
Distribution map, surface noise is distributed when aperture 55%.
Figure 11 is the flow field schematic diagram under DN125 regulating valve different opening, wherein (a) is the streamline distribution of aperture 20%,
(b) it is the pressure distribution nearby of 20% valve chamber of aperture, (c) is the streamline distribution of aperture 60%；(d) near 60% valve chamber of aperture
Pressure distribution.
Figure 12 is the noise profile schematic diagram under DN125 regulating valve different opening, wherein (a) is that 20% surface of aperture is made an uproar
Sound distribution map (b) is distributed for 60% surface noise of aperture.
Figure 13 is different flow straighteners and shut-off valve flow field figure nearby, wherein (a) is rectangular honeycomb formula flow straightener, is (b) same
Heart round type flow straightener is (c) band blocked center partial concentric round type flow straightener.
Figure 14 is that DN250 shut-off valve adds rectangle (cellular) flow straightener schematic diagram of calculation result, wherein (a) is flow straightener
Upper surface noise profile (b) is surface noise 60dB area above.
Figure 15 is that DN250 shut-off valve adds concentric-ring pattern flow straightener schematic diagram of calculation result, wherein (a) is table on flow straightener
Face noise profile (b) is surface noise 60dB area above.
Figure 16 is that DN250 shut-off valve adds with blocked center partial concentric round type flow straightener schematic diagram of calculation result, wherein
(a) it is flow straightener upper surface noise profile, (b) is surface noise 60dB area above.
Figure 17 is to pump independent schematic diagram of calculation result, wherein (a) is pressure distribution, (b) is distributed for surface noise.
Figure 18 is the flow field schematic diagram of flow straightener installed position, wherein (a) is no flow straightener, is (b) installation rectangle
(cellular) flow straightener.
Figure 19 is noise profile figure at flow straightener, wherein (a) is rectangular honeycomb formula, (b) is concentric-ring pattern, is (c) band envelope
Close central part concentric-ring pattern.
Specific embodiment
The present invention will be further described combined with specific embodiments below, but the present invention should not be limited by the examples.
Embodiment 1:
A kind of valve noise optimization method, which comprises
Step 1: using FLUENT as solver, in gate valve Parallel gate valve Parallel slide valve and Wedge Gate Valves flow respectively
Body and calculation of Acoustic Characteristics obtain the fluid and acoustic characteristic calculated result of the Parallel gate valve Parallel slide valve and Wedge Gate Valves difference；According to
The Parallel gate valve Parallel slide valve and Wedge Gate Valves fluid respectively and acoustic characteristic calculated result determine the noise characteristic of the gate valve；
Step 2: using FLUENT as solver, to the straight-through stop valve and Oblique Stop Valves point in shut-off valve
Not carry out fluid and calculation of Acoustic Characteristics obtain the fluid and acoustic characteristic calculated result of the shut-off valve；According to the through type
The fluid and acoustic characteristic calculated result of shut-off valve and Oblique Stop Valves determine the noise characteristic of the shut-off valve；
Step 3: using FLUENT as solver, fluid is carried out to the ball valve under different opening and acoustic characteristic carries out
Calculate and obtain the fluid and acoustic characteristic calculated result of the ball valve；According to the fluid harmony of the ball valve under the different opening
Learn the noise characteristic that characteristic calculated result determines the ball valve；
Step 4: using FLUENT as solver, fluid and acoustic characteristic meter are carried out to the regulating valve under different opening
Calculate the fluid and acoustic characteristic calculated result for obtaining regulating valve under the different opening；According to the regulating valve under the different opening
Fluid and acoustic characteristic calculated result determine the noise characteristic of the regulating valve；
Step 5: using FLUENT as solver, fluid and acoustics are carried out to the flow straightener for being mounted on shut-off valve downstream
Characteristic calculates, and obtains the fluid and acoustic characteristic calculated result of the flow straightener；It is special according to the fluid of the flow straightener and acoustics
Property calculated result determines the noise characteristic of the flow straightener；
Step 6: the noise in conjunction with the noise characteristic of the gate valve, the noise characteristic of the shut-off valve, the ball valve is special
The noise characteristic of property, the noise characteristic of the regulating valve and the flow straightener determines valve noise prioritization scheme.
The acquisition process of the noise characteristic of gate valve described in step 1 includes:
Step 1: establishing Parallel gate valve Parallel slide valve calculates domain model, and boundary setting is carried out to the FLUENT, using FLUENT
As solver, fluid and calculation of Acoustic Characteristics are carried out for the Parallel gate valve Parallel slide valve that nominal dimension is DN125, obtains run-in index lock
The fluid and acoustic characteristic calculated result of valve；
Step 2: generating the centre of Parallel gate valve Parallel slide valve according to the fluid of the Parallel gate valve Parallel slide valve and acoustic characteristic calculated result
Section speed vector figure, pressure-plotting and noise profile figure, wherein each figure such as Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c) institute
Show；The noise profile of the Parallel gate valve Parallel slide valve in conjunction with described in the intermediate cross-section speed vector figure, pressure-plotting and noise profile figure
Situation is analyzed, and the noise characteristic of the Parallel gate valve Parallel slide valve is obtained；
Step 3: establishing Wedge Gate Valves calculates domain model, and boundary setting is carried out to the FLUENT, is made using FLUENT
For solver, fluid and calculation of Acoustic Characteristics are carried out for the Wedge Gate Valves that nominal dimension is DN125, obtains the stream of Wedge Gate Valves
Body and acoustic characteristic calculated result；
Step 4: determining Wedge Gate Valves 40% and 85% according to the fluid of the Wedge Gate Valves and acoustic characteristic calculated result
Flow Field Distribution situation under aperture, it is specific as shown in Figures 2 and 3, according to the process distribution situation to the Wedge Gate Valves
Noise profile situation is analyzed, and obtains the noise characteristic of the Wedge Gate Valves.
Step 5: obtaining the lock in conjunction with the noise characteristic of the Parallel gate valve Parallel slide valve and the noise characteristic of the Wedge Gate Valves
The noise characteristic of valve.
Wherein, the parameter of the FLUENT and boundary are provided that
Choose stable state solver
Define→Models→Solver→Steady
Select k- ε turbulence model
Define→Models→Viscous Model
K-epsilon is selected, each constant in lot of experimental data preference pattern obtained according to forefathers.
The material parameter of duplication description water from material depot
Define→Materials→Fluent Database→Fluent fluid Materials→Water
Liquid
Boundary condition is set
Import is set as speed entrance in Parallel gate valve Parallel slide valve calculating, i.e. flow is certain, and outlet is set as free discharge；Wedge-type
Gate valve becomes import in aperture calculating and is set as pressure entrance, and outlet is set as pressure export, i.e. the pressure drop of guarantee valve is certain, uses
Standard law of wall simulating boundary laminar flow.
Setting simulation is specific to solve format and parameter
Solve→Controls→Solution
Initialization
Solve→Initialize
Initial value is assigned to each node of computational domain.
The condition of convergence is set
Solve→Monitors→Residual
The suitable condition of convergence is set, to obtain convergent result.
Iterative solution
Solve→Iterate
Select suitable iterative steps.
The suitable condition of convergence is set, to obtain convergent result.Enable noise model
After obtaining calculated result, start wideband noise model
Define→Models→Acoustics Model
Far field density (Far-Field Density) is simultaneously modified as by selection Broadband Noise Source
1000kg/m3, the far field velocity of sound (Far-Field Sound Speed) is modified as 1500m/s, and other parameters setting remains unchanged.
In addition, inlet porting flow velocity draws the maximum value 5m/s determined in working range, maximum noise is likely to occur in work to simulate
Situation.
The noise characteristic and its analytic process of the gate valve are as follows:
Fig. 1 is the Parallel gate valve Parallel slide valve calculated result for considering structure near valve sealing face.The flowing of gate valve standard-sized sheet fluid is equal
Even, the pressure loss is little at flashboard.Noise is little when gate valve standard-sized sheet, and maximum surface noise size is 53.6dB, appears in close
Around the sealing surface in downstream, area very little, as shown in Fig. 1 (c).Taking surface noise 40dB area above is sound source face, obtains noise
Weighted average is 45.3dB.Fluid, which enters, generates reflux in valve chamber, have certain impact to downstream wall surface, be to lead to larger noise
The main reason for.Hydrodynamic noise is smaller when Parallel gate valve Parallel slide valve standard-sized sheet, according to the Parallel gate valve Parallel slide valve with deflector hole, in valve
Runner is similar to straight tube when standard-sized sheet, can predict further cut down the noise that fluid enters valve chamber generation, have more excellent
Acoustic characteristic.But the Parallel gate valve Parallel slide valve of deflector hole is equipped with relatively higher required precision, outer dimension to the close stance of flashboard
Also more greatly, space layout factor should be comprehensively considered when use select suitable gate valve.Perfect number is carried out to gate valve opening-closing process
Value simulation will be related to the computational problem of unstable state dynamic mesh.In the Primary Numerical of valve calculates, by gate valve different opening
Fluid field carries out steady state values calculating, this dynamic process of approximate simulation achieves more satisfied result.In general,
Changes in flow rate in practical pipeline at valve is influenced by many factors, such as while orifice size changes, also before generation valve,
The variation of pressure difference after valve, and the variation of pressure difference will cause the variation of flow.In addition not in view of valve specific structure, parameter
Know, so for the ease of analysis, before first assuming valve, pressure difference is constant after valve, and pressure drop rule of thumb takes 0.05MPa before and after valve.Valve
Entrance is considered fully developed turbulent flow.Calculated result is as shown in Figure 2.
Under the operating condition of gate valve part aperture, flowing forms smallest cross-sectional at flashboard in valve, and pressure value minimizes, and flows
Speed is most fast.After flowing through flashboard, fluid velocity reverts to inlet flow rate, but loses due to existing, and pressure is restored, and be less than into
Mouth pressure.Due to the throttling action of valve, the flow direction for flowing through fluid after valve has been no longer parallel to axis, but tilts and be directed toward
Axis or separate axis.If gate valve upstream and downstream pressure drop keeps certain, increases with it as gate valve aperture increases flow, throttle at flashboard
Effect is obvious.The vortex region of low-pressure area and gate panel downstream that the maximum region of noise is formed present in flashboard by throttling, it is small
Larger noise profile area is very big when aperture.Maximum noise is 64dB or so, and the weighted average of 50dB area above is 53dB
Or so, noise variation is no more than 5dB under different opening, referring to table 1.It may be speculated that hydrodynamic noise size during valve opening and closing
Also it should be at this level.When aperture is larger, since flow velocity is accelerated, turbulence intensity increases, what is generated in pipeline is distributed more widely
30dB or so noise, but according to acoustic theory, this noise like can be generally submerged under maximum noise, to total noise sound intensity
Contribution is little.Flow velocity is low under small guide vane, and less, if flow keeps certain, pressure drop becomes at small guide vane lower flashboard for noise variation
Greatly, throttling noise dramatically increases.By gate valve flow field and calculation of Acoustic Characteristics, available gate valve full gate maximum noise is
50dB or so, surface noise maximum value is 63dB or so when the aperture of gate valve part, this further explanation: (1) gate valve is unfit to do tune
Amount of restriction uses, and when normal work should be such that gate valve is under full gate, in order to avoid generate biggish noise and hydraulic loss；(2) lock
Suitable when noise is with part aperture when valve opens and closes, several gate valves should not open and close simultaneously, in order to avoid noise is excessive, while avoid in pipeline
The superposition of water attack；(3) Parallel gate valve Parallel slide valve with deflector can be used under conditions of space structure allows to further decrease entirely
Flow resistance, noise when opening, facilitate line clear to safeguard.
DN125 Wedge Gate Valves acoustic characteristic under 1 different opening of table
The process that the noise characteristic of shut-off valve described in step 2 obtains includes:
Step 1: it establishes straight-through stop valve and calculates domain model, the boundary condition of the FLUENT is set；Using FLUENT
As solver, fluid and calculation of Acoustic Characteristics are carried out for the straight-through stop valve that nominal diameter is D125, D200 and D250,
Obtain the fluid and acoustic characteristic calculated result of the straight-through stop valve difference flow direction of each nominal diameter；
Step 2: it is obtained according to the fluid of the straight-through stop valve difference of each nominal diameter flow direction and acoustic characteristic calculated result
Take flow field and the noise profile situation of the straight-through stop valve of each nominal diameter, as shown in figure 4, and in conjunction with the flow field and
Noise profile situation analyzes the noise situations of the straight-through stop valve, and the noise for obtaining the straight-through stop valve is special
Property；
Step 3: it establishes Oblique Stop Valves and calculates domain model, the boundary condition of the FLUENT is set；Using FLUENT
As solver, fluid and calculation of Acoustic Characteristics are carried out for the Oblique Stop Valves of different nominal diameters, it is straight to obtain each nominal
The fluid and acoustic characteristic calculated result of the straight-through stop valve difference flow direction of diameter；
Step 4: it is obtained according to the fluid of the straight-through stop valve difference of each nominal diameter flow direction and acoustic characteristic calculated result
Flow field and the distribution of sound field of the straight-through stop valve of each nominal diameter are taken, and in conjunction with the flow field and sound-filed simulation feelings
Condition analyzes the noise situations of the Oblique Stop Valves, obtains the noise characteristic of the Oblique Stop Valves；
Step 5: it is obtained in conjunction with the noise characteristic of the straight-through stop valve and the noise characteristic of the Oblique Stop Valves
The noise characteristic of the shut-off valve.Wherein, in straight-through stop valve calculating process, inlet and outlet condition take respectively traffic ingress and
Free discharge, entrance are considered as fully developed turbulent flow, flow velocity 5m/s.According to general service condition, DN125 shut-off valve medium is by valve
It is flowed into below valve, DN200, DN250 shut-off valve medium above flap by flowing into.Using FLUENT as solver, boundary condition
Etc. relative parameters settings and step it is identical when being calculated with gate valve.In Oblique Stop Valves calculating process, using valve rod and pipeline at
The Oblique Stop Valves of 45° angle carries out flow regime and acoustic characteristic, and boundary condition is identical as straight-through stop valve in calculating, enters
Mouth flow velocity 5m/s.
The noise characteristic and Analysis of Noise Properties process of the shut-off valve are as follows:
In straight-through stop valve, fluid is flowed when flowing through valve body, flap transfers, and mobility status is complicated, pressure ladder
Degree is big, and there are low-pressure areas, the bad flow condition such as vortex, secondary flow occur.Fluid is limited when flowing out valve by flap,
There is apparent necking phenomenon, effective area of passage reduces, and flow velocity is accelerated, and noise becomes larger, and flowing through valve, there is also continue very later
Remote double helix flowing.It is larger that these factors result in the flow losses in straight-through stop valve, lock similar in pressure drop specific discharge
Valve portion separation pressure drop is high by 20%.
Complicated mobility status makes flow turbulence enhanced strength in shut-off valve, and hydrodynamic noise is bigger.Different nominal diameters
Shut-off valve maximum noise be 79dB or so, nearly 25dB higher than full gate gate valve, the noise result being calculated is referring to table 2.From
60dB or more noise profile area schematic (Fig. 5) can be clearly seen that, the main sound source of shut-off valve be located at flap nearby with
And at valve export.Because throttling action generates biggish barometric gradient at flap, fluid is big to the impact of valve chamber and flap, flowing
Acutely turnover occurs；There is constriction in mutual extrusion between fluid at valve export, and flow velocity is fast, impact is big, and turbulence intensity obviously increases
By force, this is all the reason of causing larger noise.Although there is obvious vortex in linkage section of the valve with pipeline, turbulence intensity is big
Noise is relatively low, and the influence to global noise size can be ignored.
2 straight-through stop valve calculated result of table
According to calculated result, DN200, DN250 shut-off valve are compared with DN125 shut-off valve, maximum noise and 60dB or more
The all small 2~3dB of the weighted average of noise, the type of flow noise for illustrating that fluid flows into above flap are smaller.Therefore right
Calculating and analysis has also been made in the case where DN125 shut-off valve reverse flow, i.e., fluid flows into above flap.Valve when flowing to opposite
Door 60dB or more noise profile area reduces, and noise maximum value reduces 5dB, coincide with prediction, but the pressure loss increases about
13%.
In Oblique Stop Valves, the calculated result of different nominal diameter shut-off valves is as shown in Figure 7, wherein DN125 shut-off valve
The calculating of two flow directions is carried out.Oblique Stop Valves effectively reduces the hydraulic loss of fluid overcurrent, with through type phase
10% or more is reduced than valve pressure drop, the case where especially fluid flows into above flap, 25% or so pressure can be reduced
Loss.Phenomena such as fluid particle movement transitions are more gentle in valve, vortex, reflux occurs mainly at flap.Fluid flows through
Effective area of passage reduces few after valve, and necking phenomenon and double helix motion artifacts are also improved.Single flow is cut
Only the Main Noise Sources of valve also are located at flap nearby and at valve export, referring to Fig. 8.Noise producing cause and through type are ended
Valve is similar.The Oblique Stop Valves maximum surface noise of different nominal diameters is 68dB or so, is reduced than straight-through stop valve
10dB or so, as a result referring to table 3.DN200, DN250 shut-off valve maximum noise and 60dB or more noise weighting average value ratio
DN125 shut-off valve is small, and the type of flow noise for equally illustrating that fluid flows into above flap is smaller.It is calculated by numerical value,
Maximum noise reduces about 3dB after changing DN125 Oblique Stop Valves flow direction, and weighted average also reduces the left side 1dB
It is right.Unlike through type, flow losses reduce 7.5% after calculated result display changes flow direction.
3 Oblique Stop Valves calculated result of table
Flow field and calculation of Acoustic Characteristics by shut-off valve, it is available to draw a conclusion: (1) straight-through stop valve full gate
Surface noise is up to 79dB or so when work, and high 25dB of noise or so compared with gate valve, Ying Jinliang avoids the use of shut-off valve；
(2) Oblique Stop Valves surface noise is up to 68dB or so, reduces about 10dB than through type, and the pressure loss reduces 10~
25%, it should be specifically noted that be need to guarantee after Pipe installing convenient for operation；(3) flow direction of shut-off valve is to noise, waterpower
Loss has an impact, and the type of flow hydrodynamic noise flowed into above flap is smaller.
The acquisition process of the noise characteristic of the ball valve described in step 3 includes:
Step 1: establishing ball valve and calculate domain model, the boundary condition of the FLUENT is set；
Step 2: using FLUENT as solver respectively to the flow field under ball valve 35%, 55%, 65% and 75% aperture
Steady state values are calculated, and the steady state values calculated result of the ball valve is obtained, wherein the aperture with ball valve port axes and
The complementary angle of pipeline runner axis angle is standard, and in solver calculating process, inlet and outlet condition takes pressure entrance respectively
And pressure export, pressure drop take 0.05MPa；
Step 3: the spherome surface pressure under 55% and 75% aperture is obtained according to the steady state values calculated result of the ball valve
Power distribution, streamline distribution and surface noise distribution situation；
Step 4: determining the ball in conjunction with spherome surface pressure distribution, streamline distribution and surface noise distribution situation
The noise characteristic of valve.
The noise characteristic and Analysis of Noise Properties process of the ball valve are as follows:
The calculated result of ball valve is as shown in Figure 9 and Figure 10.Fluid in ball valve flows to form minimum cut when passing in and out sphere
Face, pressure value minimize, and flow velocity rises to maximum.Flowing more disorder in sphere, it is particularly evident in the case where small guide vane.
The downstream pressure of valve restores, but still less than the pressure value of upstream, speed has reverted to initial value.Compared with shut-off valve calculated result,
Flow velocity close in the case where, the pressure loss of ball valve part aperture is suitable with loss when shut-off valve standard-sized sheet, and maximum noise subtracts
Small 15dB or so, it is seen that ball valve has lesser flow resistance and good acoustic characteristic.Sound compared with gate valve, under close flow
Characteristic is essentially identical, and the flow of ball valve just has greatly changed in the case where sphere turns over smaller angle, and sensitivity is more
Height should select to use which kind of valve according to the requirement installed and used: since gate valve anufacturability is good, usual situation DN >=
Gate valve is all selected in the pipeline of 50mm；And it is high in sealing, anticorrosive requirement, and require the occasion of fast opening and closing that should use ball
Valve.
DN125 ball valve acoustic characteristic under 4 different opening of table
The noise characteristic acquisition process of regulating valve described in step 4 includes:
Step a: it establishes regulating valve and calculates domain model, the boundary condition of the FLUENT is set；
Step b: FLUENT is used to carry out flow field to aperture as solver for 20%, 40% and 60% regulating valve
With the calculating of acoustic characteristic, flow field and the acoustic characteristic calculated result of the regulating valve are obtained；
Step c: the institute under 20% and 60% aperture is obtained according to the flow field of the regulating valve and acoustic characteristic calculated result
State the streamline distributions, the neighbouring pressure distribution situation of valve chamber and surface noise distribution situation of regulating valve；
Step d: according to pressure distribution situation near the streamline distributions of the regulating valve, valve chamber and surface noise point
Cloth situation determines the noise characteristic of the regulating valve.
Wherein, pressure drop is rule of thumb fixed as 0.05MPa before and after the valve of regulating valve, and entrance is considered fully developed rapids
Stream.Meter using FLUENT as solver, the relative parameters settings such as boundary condition and step and gate valve, ball valve part aperture
It is identical.
The noise characteristic and Analysis of Noise Properties process of the regulating valve are as follows:
Single-seat adjusting valve structure is similar with shut-off valve, and calculated result is also more similar.Fluid flows generation when flowing through flap
Turnover, mobility status is complicated, the bad flow condition such as vortex, secondary flow occurs.Fluid has apparent constriction when flowing out valve
Phenomenon, effective area of passage reduce, and flow velocity is accelerated, and noise becomes larger, and flowing through valve, there is also persistently far double helix streams later
It is dynamic.What flap shape selected in calculating is linear characteristic, but finally linear not strong, and changes in flow rate is sensitive when aperture is larger
It spends not high.Illustrate that regulating valve flow is influenced by many factors such as pressure difference, apertures, the simple aperture that changes is not kissed with actual conditions
It closes.Calculated result is as shown in figure 11.By near flap throttling left and right and impact of the fluid to valve chamber and flap, regulating valve
Main Noise Sources are located at flap nearby and at valve export.Maximum surface noise is slightly smaller compared with shut-off valve, and when standard-sized sheet is
75.9dB, about 5dB lower than shut-off valve.Illustrate that the flap shape of gradual change reduces the impact of flowing, is conducive to noise reduction.Different opening
Lower valve maximum noise has certain variation, and noise drops to 65dB or so when aperture is smaller.As a result referring to table 2, Figure 12.
DN125 regulating valve calculated result under 5 different opening of table
In conjunction with calculated result under different opening of gate valve, ball valve, regulating valve it can be found that the noise of valve is not with aperture
Change and is monotonically changed.During valve is closed by full gate, aperture is compared with big valve flap phase when in original runner
Liquid resistance is increased, and flow velocity reduces less, turbulence intensity enhancing, noise increases；When closing to a certain extent, under a certain pressure
Valve flow is smaller, and turbulence intensity reduces, and gradually to hydrostatic transition, noise becomes smaller mobility status again.
Flow field and calculation of Acoustic Characteristics by single-seat adjusting valve obtain surface noise when the work of single-seat adjusting valve full gate
Maximum value is 75.9dB, about 5dB smaller than shut-off valve noise, but 15dB or more higher than gate valve and ball valve noise.Since the time is limited,
Further calculate is not made to the regulating valve of other types.According to current calculated result, for making an uproar for further abatement regulating valve
Sound is proposed with following measures: (1) using single flow regulating valve.Shut-off valve calculated result is shown using single flow runner, noise
About 10dB can be reduced, flow resistance also reduces, and under the premise of after guaranteeing Pipe installing convenient for operation, can use direct current instead
The single-seat adjusting valve of formula；(2) using V-arrangement ball valve as regulating valve.According to calculated result, the maximum surface of ball valve different opening is made an uproar
Sound is generally in 65dB hereinafter, therefore there is good Flow Adjusting Performance V-arrangement ball valve should also have sound more better than single-seat adjusting valve
Learn characteristic.
The acquisition process of the noise characteristic of flow straightener described in step 5 includes:
A step: establishing flow straightener and calculate domain model and flow straightener optimization straight-through stop valve model, described in setting
The boundary condition of FLUENT；
B step: carrying out flow field situation with straight-through stop valve to the flow straightener optimization of not set flow straightener and acoustics calculate,
Obtain noise characteristic basic data；
C step: the current stabilization for being respectively D125 with nominal dimension for rectangular honeycomb formula flow straightener and concentric-ring pattern flow straightener
Device optimization cooperated with straight-through stop valve after flow field situation and acoustic characteristic carry out simulation calculating, meanwhile, for rectangular honeycomb
Formula flow straightener, concentric-ring pattern flow straightener and with blocked center partial concentric round type flow straightener respectively with nominal dimension be D250 it is steady
It flows the flow field situation after device optimization is cooperated with straight-through stop valve and acoustic characteristic carries out simulation calculating, obtain flow straightener and stream device
Optimization straight-through stop valve cooperate after flow field and acoustics performance data；
D step: matched according to the noise characteristic basic data and the flow straightener with stream device optimization straight-through stop valve
The comparison in flow field and acoustics performance data after conjunction, determines influence of the flow straightener to straight-through stop valve flow field and noise characteristic；
E step: circular arc is connected using the pump housing in simulated flow pattern after impeller X and spiral case A scaling, and in the inlet of the pump housing
Radius is the bend pipe of 1/2 caliber, carries out pressure distribution to the pump housing and surface noise distribution calculates, obtain pump housing flow field and make an uproar
Sound characteristics basic data；
F step: rectangular honeycomb formula flow straightener, concentric-ring pattern flow straightener are respectively set on the pump housing and with blocked center part
Concentric-ring pattern flow straightener, and the flow field and noise characteristic of the pump housing being provided under all kinds of flow straighteners are calculated, obtain current stabilization
Flow field and noise characteristic data after device and pump housing cooperation；
G step: by flow field and noise after the pump housing flow field and noise characteristic basic data and the cooperation of flow straightener and the pump housing
Performance data compares, and obtains influence of the flow straightener to pump housing flow field and noise characteristic；The flow straightener is to through type
The influence in the flow field and noise characteristic of shut-off valve flow field and the pump housing is the noise characteristic of the flow straightener；Wherein, side in calculating
Boundary's condition still takes traffic ingress and free discharge, inlet flow rate 5m/s, the flow straightener optimization valve of straight-through stop valve
Runner model is not identical as the valve flowing channel model of straight-through stop valve described in step 2.
The analysis method of the noise characteristic of flow straightener and the noise characteristic includes:
The calculated result of flow straightener is not added in comparison shut-off valve, increase flow straightener to fluid the intracorporal flowing of valve change not
Greatly, but by flow straightener it arranges, double helix, which flows, to be eliminated.Rectangle (cellular) flow straightener is maximum to the constraint of flowing,
Other two flow straightener spacer gap is larger, and there is also slight screws after fluid passes through.Flow Field Calculation result such as Figure 13 institute
Show.Since flow straightener itself also corresponds to flow resistance at one, flow regime is improved, but the pressure loss might not subtract
It is small, referring to table 6.Since flow straightener topological structure is complicated, surface area is big, and the distribution area of larger surface noise is also more than valve body
Extensively.When not installing flow straightener, valve maximum surface noise is 80dB or so.DN125 shut-off valve installs maximum noise after flow straightener additional
About 3dB is reduced, flow losses reduce about 12%, and noise is not bery violent at flow straightener, and maximum surface noise is 64dB or so,
15dB lower than valve body section or so influences very little to total sound intensity.And DN250 shut-off valve install additional flow straightener after maximum noise only
It has dropped less than 1dB, flow losses increase about 13%, and maximum surface noise is 74~80dB at flow straightener, compared with valve body
Low 3~6dB takes valve and flow straightener is two independent sound sources, then practical total sound intensity improves 1dB or so according to acoustics calculation method.
By comparing surface noise 60dB area above noise weighting average value, it is seen that average noise is declined after installation flow straightener,
Illustrate that overall noise level can be reduced by installing flow straightener improvement flow field.Wherein the noise reduction effect of rectangle (cellular) flow straightener is slightly
It is better than other two kinds of flow straighteners, this is most strong related with constraint of the type flow straightener to flowing.
6 flow straightener of table and shut-off valve calculated result
In addition, influence of the present embodiment to flow straightener to pump flow field has carried out numerical value calculating.Since project does not provide pump
It is model, leaf, the impeller X and spiral case A of U.S. Byron Jackson Beng Ye company are used in the present embodiment research, are contracted in proportion
The calculating under similar operating condition has been carried out after putting.Referring to table 7, pump lift is obtained the major parameter of the pump by numerical result.Pump
Entrance according to actual arrangement situation be connected to arc radius be 1/2 caliber bend pipe.Independent schematic diagram of calculation result is pumped as schemed
Shown in 17.
The major parameter that table 7 pumps
For maximum noise present in cut water, maximum surface noise reaches 104dB when pump work after scale-up.In bend pipe
Before downstream, pump suction chamber plus after flow straightener, pump maximum noise is calculated and increases to 107dB or so, still present in cut water,
And maximum noise only 50dB or so at flow straightener, it can be ignored for overall noise.Originally it is in pump intake flow field
In the case where Uniform Flow, flow straightener is installed additional at pump inlet, abating noises are not helped, increase flow resistance instead.Practical work
Generally there are the devices such as valve for adjusting flow or cutting medium in being used as before pump inlet.Therefore, also before reply pump suction chamber
Equipped with valve, flow field more disorder the case where studied.Before pump when installation valve, movement disorder at valve export is caused
There is slight helical flow in pump suction chamber.Flow field of pump inlet is become flat uniformly after installation flow straightener, eliminates fluid warp
Cross the double helix flowing of valve generation.But the reflux vortex region since flow straightener is not strong to the limitation axially flowed, at winding pipe exit
It is not eliminated, referring to Figure 18.The improvement of the acoustic characteristic pumped after installation flow straightener is not significant, in the case where no flow straightener
Maximum noise at cut water is 107.1dB, and in the case where there is flow straightener, the maximum noise of pump is increased close to 1dB, but pumps leaf
The weighted average of noise reduces 2~3dB on wheel, referring to table 8.It is distributed by the surface noise on Figure 19 flow straightener as it can be seen that curved
The noise of reflux vortex region is very low after pipe, reduces the weighted average of flow straightener overall noise, makes weighted average and table 6
Calculated result compares low nearly 10dB.
The pump of table 8 and valve, flow straightener combined calculation result
Installation flow straightener improves the inlet flow field of pump, so that its suction chamber interior flow field be made to homogenize, and makes the leaf of pump
Wheel part weighted average noise decreases.But compared with the influence of pump fluid motion, the influence very little of flow straightener.At cut water
Flowing is asymmetric, has close ties between separation tongue gap and pumped vibration characteristic, and making an uproar for the position can not be cut down by only improving flow field
Sound.This also illustrates that the structure at cut water should be paid close attention in the design phase of pump, is avoided causing to pump work because cut water design is improper
Occur excessive vibration and noise in work.
The maximum noise of archetypal pump employed in the present embodiment calculating is only 45dB or so, and pump is in similar work after amplifying
The noise to work under condition is higher than 100dB, and calculated result is widely different.This problem may be due to fluid pulsation under similar operating condition
And caused by dissmilarity.Similar operating condition ensure that fluid viscous force is similar, generally can with the similar of the parameters such as guaranteed efficiency, but
Fluid pulsation phenomenon is not directly relevant to viscous force size.Turbulence intensity enhances after pumping size amplification, but microcosmic pulsating quantity
Relationship between increment and geometric dimension is not known still, because the fluid noise calculated result that turbulence pulsation causes may be distorted.The stream of pump
The vibration that body exciting force induces is to generate a main cause of vibration and noise.Since there are the originals of unbalance mass, for rotor
Cause, usual vane rotor are in bias state, along with the relative motion between the variation of centrifugation pump condition and sound component, rotation whirlpool
The factors such as the radial imbalances of generations such as band, all can be such that vane rotor circumferential pressure is unevenly distributed, therefore radially generate in impeller
Fluid exciting force induces rotor self-excited vibration.Radial direction is described using the force coefficients of nondimensionalization in the present embodiment research
Power size:
F in formula*--- act on the active force on impeller, N；ρ --- fluid density, kg/m3；B --- impeller outlet is wide
Degree, m；Ω --- rotational angular velocity, rad/s；R2--- impeller outlet radius, m.Impeller turns over one week, impeller radial force variation
It is identical as the number of blade for 5 periods.This shows that with frequency in the available flow field of the method for Unsteady Flow Calculation be Ye Pin
Exciting force, the power be pumping system in pressure fluctuation one of source.The impeller of pump of three kinds of different form flow straighteners is installed in import
Radial force absolute coefficient is smaller compared with no flow straightener, and X and Y-direction reduce about 3%.Illustrate that flow straightener pair is installed
There is certain help in improving flow field, enhancing stability.
By the analysis to gate valve, shut-off valve, ball valve, regulating valve and flow straightener noise characteristic, and then obtain such as lower valve
Noise optimization scheme or optimization direction:
(1) maximum surface noise is 79dB or so, main noise under the straight-through stop valve full gate of different nominal diameters
Biggish flap is impacted nearby and at valve export in source between fluid.Oblique Stop Valves surface noise is up to the left side 68dB
The right side reduces about 10dB than through type, and the pressure loss reduces 10~25%, the case where guaranteeing after Pipe installing convenient for operation
Under, alternative straight-through stop valve.Shut-off valve noise is related with fluid flow direction in valve, the flowing side flowed into above flap
Formula hydrodynamic noise and parthydraulic loss are smaller；
(2) when not changing valve pressure drop, the maximum surface noise under gate valve, O shape ball valve different opening is respectively less than 65dB, says
If bright incoming flow is relatively uniform, the noise during valve opening and closing also should be in 65dB or so.Gate valve, O-shaped ball valve noise size
Do not change with valve opening and be monotonically changed, and reaches when valve is certain a part of aperture maximum.Valve becomes during aperture
Maximum noise, and the reason of generating this phenomenon, need further to study；
(3) gate valve, O-shaped ball valve and shut-off valve generally all only make the fully closed use of standard-sized sheet.Under the conditions of similar in the flow, lock
Valve, O-shaped ball valve part aperture noise 15dB smaller than straight-through stop valve or so, parthydraulic loss reduce 17% or so, and complete
Both valve flowing channels are equivalent to a Duan Yuanguan when full open.Therefore except valve be welded into one or open and close with pipeline it is frequent etc. special
Occasion should replace shut-off valve using gate valve and ball valve as far as possible.Since gate valve anufacturability is good, DN >=50mm under normal conditions
Gate valve all can be selected in pipeline to be used as to cut off medium, and height is being required to sealing, corrosion resistance, and require fast opening and closing
Occasion should use ball valve；
(4) by the flow field of single-seat adjusting valve and calculation of Acoustic Characteristics, the surface when work of single-seat adjusting valve full gate is obtained
Noise maximum value is 75.9dB, about 3dB smaller than shut-off valve noise, but 15dB or more higher than gate valve, O-shaped ball valve noise, noise
Changing rule is similar to gate valve and O-shaped ball valve.For the noise for further eliminating regulating valve, it is proposed that using using with good stream
Regulation performance V-arrangement ball valve is measured as regulating valve.According to calculated result, under ball valve different opening maximum surface noise 65dB with
Under, can predict V-arrangement ball valve also has acoustic characteristic more better than single-seat adjusting valve；
(5) in the pipeline that flow media is water, to reduce, noise is standing to set flow straightener uniform velocity uniforming device.Current stabilization
There is good flow velocity to homogenize and flow arrangement function to valve export flow field for device, and it is average to reduce flow field overall noise
Level, wherein the most significant with rectangle (cellular) flow straightener effect.But flow straightener itself will also tend to generate low when Large Diameter Pipeline
In the noise of 3~4dB of maximum noise, and bring 13% or so additional flow resistance can not therefore when connecting after valve common pipeline
Flow straightener is installed；
(6) pump is most important sound source in pipeline, pumps maximum surface noise and is generally present in cut water position.Subject study
Pump maximum noise reaches 108dB.Flow straightener is installed before suction chamber can often improve flow field at pump inlet.Calculated result explanation is logical
Pump ensemble average noise about 3% can be reduced by crossing flow straightener improvement flow field, and be reduced by about 3% blade radial power, to vibration and noise reducing
It has the certain significance, but maximum noise at cut water can not be reduced.It realizes that the vibration and noise reducing of pump should improve the design of pump, and makes it as far as possible
It works under optimum operating condition.
Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the invention, any to be familiar with this
The people of technology can do various changes and modification, therefore protection of the invention without departing from the spirit and scope of the present invention
Range should subject to the definition of the claims.
Claims (6)
1. a kind of valve noise optimization method, which is characterized in that the described method includes:
Step 1: using FLUENT be used as solver, in gate valve Parallel gate valve Parallel slide valve and Wedge Gate Valves carry out respectively fluid with
Calculation of Acoustic Characteristics obtains the fluid and acoustic characteristic calculated result of the Parallel gate valve Parallel slide valve and Wedge Gate Valves difference；According to described
Parallel gate valve Parallel slide valve and Wedge Gate Valves fluid respectively and acoustic characteristic calculated result determine the noise characteristic of the gate valve；
Step 2: using FLUENT as solver, in shut-off valve straight-through stop valve and Oblique Stop Valves respectively into
Row fluid and calculation of Acoustic Characteristics obtain the fluid and acoustic characteristic calculated result of the shut-off valve；Ended according to the through type
The fluid and acoustic characteristic calculated result of valve and Oblique Stop Valves determine the noise characteristic of the shut-off valve；
Step 3: using FLUENT as solver, fluid is carried out to the ball valve under different opening and acoustic characteristic calculates
And obtain the fluid and acoustic characteristic calculated result of the ball valve；It is special according to the fluid of the ball valve under the different opening and acoustics
Property calculated result determines the noise characteristic of the ball valve；
Step 4: using FLUENT as solver, fluid is carried out to the regulating valve under different opening and calculation of Acoustic Characteristics obtains
Take the fluid of regulating valve and acoustic characteristic calculated result under the different opening；According to the stream of the regulating valve under the different opening
Body and acoustic characteristic calculated result determine the noise characteristic of the regulating valve；
Step 5: using FLUENT as solver, fluid and acoustic characteristic are carried out to the flow straightener for being mounted on shut-off valve downstream
It calculates, obtains the fluid and acoustic characteristic calculated result of the flow straightener；According to the fluid of the flow straightener and acoustic characteristic meter
Calculate the noise characteristic that result determines the flow straightener；
Step 6: in conjunction with the noise characteristic, the noise characteristic of the shut-off valve, the noise characteristic of the ball valve, institute of the gate valve
The noise characteristic of the noise characteristic and the flow straightener of stating regulating valve determines valve noise prioritization scheme.
2. valve noise optimization method according to claim 1, which is characterized in that the noise characteristic of gate valve described in step 1
Acquisition process includes:
Step 1: establishing Parallel gate valve Parallel slide valve calculates domain model, and boundary setting is carried out to the FLUENT, using FLUENT conduct
Solver carries out fluid and calculation of Acoustic Characteristics for the Parallel gate valve Parallel slide valve that nominal dimension is DN125, obtains Parallel gate valve Parallel slide valve
Fluid and acoustic characteristic calculated result；
Step 2: generating the intermediate cross-section of Parallel gate valve Parallel slide valve according to the fluid of the Parallel gate valve Parallel slide valve and acoustic characteristic calculated result
Speed vector figure, pressure-plotting and noise profile figure；In conjunction with the intermediate cross-section speed vector figure, pressure-plotting and noise
The noise profile situation of Parallel gate valve Parallel slide valve described in distribution map is analyzed, and the noise characteristic of the Parallel gate valve Parallel slide valve is obtained；
Step 3: establishing Wedge Gate Valves calculates domain model, and boundary setting is carried out to the FLUENT, is used as and is asked using FLUENT
Solve device, carry out fluid and calculation of Acoustic Characteristics for the Wedge Gate Valves that nominal dimension is DN125, obtain Wedge Gate Valves fluid and
Calculation of Acoustic Characteristics result；
Step 4: determining the aperture of Wedge Gate Valves 40% and 85% according to the fluid of the Wedge Gate Valves and acoustic characteristic calculated result
Under Flow Field Distribution situation, analyzed according to noise profile situation of the process distribution situation to the Wedge Gate Valves, and
Obtain the noise characteristic of the Wedge Gate Valves.
Step 5: obtaining the gate valve in conjunction with the noise characteristic of the Parallel gate valve Parallel slide valve and the noise characteristic of the Wedge Gate Valves
Noise characteristic.
3. valve noise optimization method according to claim 1, which is characterized in that the noise characteristic of shut-off valve described in step 2
The process of acquisition includes:
Step 1: it establishes straight-through stop valve and calculates domain model, the boundary condition of the FLUENT is set；Using FLUENT conduct
Solver carries out fluid and calculation of Acoustic Characteristics for the straight-through stop valve of different nominal diameters, obtains each nominal diameter
The fluid and acoustic characteristic calculated result of straight-through stop valve difference flow direction；
Step 2: institute is obtained according to the fluid of the straight-through stop valve difference of each nominal diameter flow direction and acoustic characteristic calculated result
Flow field and the noise profile situation of the straight-through stop valve of each nominal diameter are stated, and in conjunction with the flow field and noise profile situation pair
The noise situations of the straight-through stop valve are analyzed, and the noise characteristic of the straight-through stop valve is obtained；
Step 3: it establishes Oblique Stop Valves and calculates domain model, the boundary condition of the FLUENT is set；Using FLUENT conduct
Solver carries out fluid and calculation of Acoustic Characteristics for the Oblique Stop Valves of different nominal diameters, obtains each nominal diameter
The fluid and acoustic characteristic calculated result of straight-through stop valve difference flow direction；
Step 4: institute is obtained according to the fluid of the straight-through stop valve difference of each nominal diameter flow direction and acoustic characteristic calculated result
Flow field and the distribution of sound field of the straight-through stop valve of each nominal diameter are stated, and in conjunction with the flow field and distribution of sound field pair
The noise situations of the Oblique Stop Valves are analyzed, and the noise characteristic of the Oblique Stop Valves is obtained；
Step 5: in conjunction with described in the noise characteristic of the straight-through stop valve and the noise characteristic acquisition of the Oblique Stop Valves
The noise characteristic of shut-off valve.
4. valve noise optimization method according to claim 1, which is characterized in that the noise of the ball valve described in step 3 is special
The acquisition process of property includes:
Step 1: establishing ball valve and calculate domain model, the boundary condition of the FLUENT is set；
Step 2: using FLUENT as solver respectively to the flow field stable state under ball valve 35%, 55%, 65% and 75% aperture
Numerical value is calculated, and obtains the steady state values calculated result of the ball valve, wherein the aperture is with ball valve port axes and pipeline
The complementary angle of runner axis angle is standard, and in solver calculating process, inlet and outlet condition takes pressure entrance and pressure respectively
Power outlet, pressure drop take 0.05MPa；
Step 3: the spherome surface pressure point under 55% and 75% aperture is obtained according to the steady state values calculated result of the ball valve
Cloth, streamline distribution and surface noise distribution situation；
Step 4: determining the ball valve in conjunction with spherome surface pressure distribution, streamline distribution and surface noise distribution situation
Noise characteristic.
5. valve noise optimization method according to claim 1, which is characterized in that the noise characteristic of the regulating valve obtained
Journey includes:
Step a: it establishes regulating valve and calculates domain model, the boundary condition of the FLUENT is set；
Step b: FLUENT is used to carry out flow field harmony to aperture as solver for 20%, 40% and 60% regulating valve
The calculating for learning characteristic, obtains flow field and the acoustic characteristic calculated result of the regulating valve；
Step c: the tune under 20% and 60% aperture is obtained according to the flow field of the regulating valve and acoustic characteristic calculated result
Save the streamline distributions, the neighbouring pressure distribution situation of valve chamber and surface noise distribution situation of valve；
Step d: feelings are distributed according to pressure distribution situation near the streamline distributions of the regulating valve, valve chamber and surface noise
Condition determines the noise characteristic of the regulating valve.
6. valve noise optimization method according to claim 1, which is characterized in that the noise characteristic of flow straightener described in step 5
Acquisition process include:
A step: it establishes flow straightener and calculates domain model and flow straightener optimization straight-through stop valve model, be arranged the FLUENT's
Boundary condition；
B step: flow field situation is carried out with straight-through stop valve to the flow straightener optimization of not set flow straightener and acoustics calculates, is obtained
Noise characteristic basic data；
C step: excellent for the flow straightener of D125 with nominal dimension respectively for rectangular honeycomb formula flow straightener and concentric-ring pattern flow straightener
Change cooperated with straight-through stop valve after flow field situation and acoustic characteristic carry out simulation calculating, meanwhile, it is steady for rectangular honeycomb formula
Flow device, concentric-ring pattern flow straightener and with blocked center partial concentric round type flow straightener respectively with nominal dimension be D250 flow straightener
Optimization cooperated with straight-through stop valve after flow field situation and acoustic characteristic carry out simulation calculating, obtain flow straightener and stream device optimization
Flow field and acoustics performance data after being cooperated with straight-through stop valve；
D step: after being cooperated according to the noise characteristic basic data and the flow straightener and stream device optimization straight-through stop valve
Flow field and acoustics performance data comparison, determine influence of the flow straightener to straight-through stop valve flow field and noise characteristic；
E step: arc radius is connected using the pump housing in simulated flow pattern after impeller X and spiral case A scaling, and in the inlet of the pump housing
For the bend pipe of 1/2 caliber, pressure distribution is carried out to the pump housing and surface noise distribution calculates, obtained pump housing flow field and noise is special
Property basic data；
F step: rectangular honeycomb formula flow straightener, concentric-ring pattern flow straightener are respectively set on the pump housing and with blocked center partial concentric
Round type flow straightener, and the flow field and noise characteristic of the pump housing being provided under all kinds of flow straighteners are calculated, obtain flow straightener with
Flow field and noise characteristic data after pump housing cooperation；
G step: by flow field and noise characteristic after the pump housing flow field and noise characteristic basic data and the cooperation of flow straightener and the pump housing
Data compare, and obtain influence of the flow straightener to pump housing flow field and noise characteristic；The flow straightener ends through type
The influence in the flow field and noise characteristic of valve flow field and the pump housing is the noise characteristic of the flow straightener；
Wherein, the valve flowing channel model of the flow straightener optimization straight-through stop valve and straight-through stop valve described in step 2
Valve flowing channel model is not identical.
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| CN201811214922.7A CN109386650A (en) | 2018-10-18 | 2018-10-18 | A kind of valve noise optimization method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811214922.7A CN109386650A (en) | 2018-10-18 | 2018-10-18 | A kind of valve noise optimization method |
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| CN110260931A (en) * | 2019-06-18 | 2019-09-20 | 西安航天动力试验技术研究所 | A kind of liquid propellant pipeline flow field quality evaluation system and evaluation method |
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| CN113503291A (en) * | 2021-06-09 | 2021-10-15 | 西安交通大学 | Flow regulator for measuring flow field behind bent pipe |
| CN113779709A (en) * | 2021-07-21 | 2021-12-10 | 重庆川仪调节阀有限公司 | Regulating valve noise determination method |
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| CN110260931A (en) * | 2019-06-18 | 2019-09-20 | 西安航天动力试验技术研究所 | A kind of liquid propellant pipeline flow field quality evaluation system and evaluation method |
| CN112329160A (en) * | 2020-10-10 | 2021-02-05 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Valve noise optimization method and system based on energy management and control |
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| CN113503291A (en) * | 2021-06-09 | 2021-10-15 | 西安交通大学 | Flow regulator for measuring flow field behind bent pipe |
| CN113503291B (en) * | 2021-06-09 | 2022-08-05 | 西安交通大学 | Flow regulator for measuring flow field behind bent pipe |
| CN113779709A (en) * | 2021-07-21 | 2021-12-10 | 重庆川仪调节阀有限公司 | Regulating valve noise determination method |
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