CN105536339B - A kind of frequency modulation type self-oscillation flow jet flow device and its application method - Google Patents
A kind of frequency modulation type self-oscillation flow jet flow device and its application method Download PDFInfo
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- CN105536339B CN105536339B CN201610041757.4A CN201610041757A CN105536339B CN 105536339 B CN105536339 B CN 105536339B CN 201610041757 A CN201610041757 A CN 201610041757A CN 105536339 B CN105536339 B CN 105536339B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D33/503—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles the backwash arms, shoes acting on the cake side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/08—Regeneration of the filter
- B01D2201/081—Regeneration of the filter using nozzles or suction devices
- B01D2201/084—Nozzles placed on the filtrate side of the filtering element
Abstract
The present invention relates to a kind of frequency modulation type self-oscillation flow jet flow device and its application method, housing, base plate, vertical jet import, rectification chamber, mixed flow chamber, jet exit and peripheric jet flow import that it includes tubular opening structure；Housing bottom is fixedly connected at opening with base plate；Case top is vertically installed with vertical jet import, and vertical jet entrance end is connected with counter-flushing pipeline, vertical jet import export end be located at housing internal upper part rectification chamber；In housing, passage and mixed flow chamber are disposed with below rectification chamber, rectification chamber lower section connects with feeder connection, and channel outlet is located at mixed flow chamber inlet top, and mixed flow chamber outlet passes base plate and connected with jet exit；Jet integration region is formed between channel outlet and mixed flow chamber ingress；Positioned at channel upper, some peripheric jet flow imports connected with channel upper are arranged at intervals with housing upper lateral wall.Saving energy consumption of the present invention, it is to avoid caused by too high surge the problems such as filter screen local deformation, erosion breakage.
Description
Technical field
The present invention relates to a kind of solid-liquor separation fluidic device and its application method, especially with regard to a kind of and LNG receiving stations
The frequency modulation type self-oscillation flow jet flow device and its application method of rotary sieve filter fits.
Background technology
The features such as LNG receiving stations rotary sieve filter has seawater corrosion resistance, separative efficiency stabilization and appropriate resistance,
Rotary sieve filter is generally supported the use with the trash rack of upstream side, can effectively be intercepted miscellaneous with particle in filtering sea
Matter dirt, is the key equipment for ensureing LNG receiving station's sea water pumps and intake facility reliability service.
As shown in Figure 1 to 4, rotary sieve filter primary structure includes：Upper stand 21, motor 22, turbine snail
Bar reductor 23, driving chain 24, guide rail 25, main shaft turn with 26, screen pack 27, backwash cyclic regeneration device 28 and collection
Dirty groove 29 etc..Wherein backwash cyclic regeneration device 28 is main by supply-water pump, magnetic valve, counter-flushing pipeline and and backwash tube
The connected jet nozzle part in road is constituted.The operation principle of rotary sieve filter is：Motor 22 is rotated and drives turbine and worm
Reductor 23 is moved, and makes driving chain 24 that the big biography in work sprocket wheel spindle mounted 26 is driven via guide rail 25 by engaging
Movable sprocket is rotated, and part is disengaged from below work sprocket radius to being the distance between more than basin bottom arc orbit radius
Linear motion, work chain movement drives screen pack 27 thereon to move.Because the motion process of screen pack 27 is on one end
Rise, the other end declines, filtering is intercepted the particle debris on wire side and taken out of by the rising end of screen pack 27 in uphill process,
Grain debris are trapped and cake layer are formed on web plate, and with the carrying out of filtering, the cake layer progressive additive of web plate outer surface causes
The porosity reduction of screen pack 27, pressure drop increase is now needed using backwash cyclic regeneration device 28 using backwash
Mode is purged to the granule foreign being attached on rotary sieve, and during backwash, magnetic valve is opened, and supply-water pump lifts the pressure of water
Power forms press water, and press water sprays via counter-flushing pipeline from nozzle, and the particle debris punching that will be attached on screen pack falls
To in sewage sump 29, then debris punching is shifted onto blowdown ditch by sewage sump 29, then concentrate and unload dirty and transport.Because backwash is followed
Direction and the filtering direction of the water jet that ring regenerating unit 28 is used conversely, therefore which is also referred to as backwashing circular regeneration,
The cake layer that the high pressure water kinetic energy that depending nozzle sprays will attach to screen pack outer surface is peeled off so that the hole of screen pack 27
State when gap rate and operation pressure drop essentially return to initially filter, so as to the performance cycle for realizing rotary sieve regenerates.
As can be seen here, backwash mode is the important channel for realizing the regeneration of the performance cycle of screen pack 27, is found in research,
Jet nozzle performance in backwash cyclic regeneration device 28 directly affects the long-period stable operation of rotary sieve filter.It is existing
The jet nozzle for having backwash cyclic regeneration device in technology is through type single tube structure, is mainly realized in the way of solid jet
Backwash operation is carried out to rotary sieve.Rotary sieve finds this back-flushing structure in solid jet in actual moving process
In inevitably produce problems with：1st, backwash jet pressure is too high, causes rotary filter screen plate local deformation even
Erosion is damaged.To overcome the filter cake layer adhesion in filter process in rotary filter screen plate, the pressure of backwashing water jet is usual
Up to 0.8MPa-1MPa, operation energy consumption is high, and jet impact force is big, because prior art uses through type single hole arrangements
Jet nozzle, can only be rinsed in the way of solid jet to rotary sieve, and jet impact force was inevitably concentrated on
The a certain region of sieve plate, the screen pack in the region is easily subject to impulsive force higher and deforms upon even erosion breakage,
Reduce the service life of rotary sieve.2nd, backwash circular regeneration effect is uneven, causes rotary filter screen plate that particle occurs miscellaneous
Matter is built bridge and blocks failure.Due to the limitation of prior art nozzle arrangements, backwash stream range is limited, it is impossible to realize to filtering
, there is jet blind area in all standing of web plate, the granule foreign for being attached to jet blind area cannot be removed efficiently, this problem due to
The limitation in itself of installation space and technology, cannot fundamentally achieve a solution at present, it has also become the technology of puzzlement industry is difficult
Topic.Screen pack effectively rinses in the range of region and rinses the circular regeneration difference on effect of blind area significantly, in flushing blind area
Screen pack between granule foreign be susceptible to build bridge, that is, fail effectively obtain remove some regions particulate thing impurities phases
Mutually being bonded blocking formation larger range of can not effectively remove region.Bridge formation causes filter screen that Severe blockage occurs, and causes rotation
A series of problems, such as strainer filtering pressure drop rising, operation energy consumption increase and operational failure.
In sum, existing backwash indirect regeneration easily causes that filter net jam, filter screen be damaged, cycle performance is unstable
And the problems such as high energy consumption.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of frequency modulation type self-oscillation flow jet flow device and its user
Method, preferable circular regeneration effect, saving energy consumption are reached with relatively low backwashing pressure；Caused by avoiding too high surge
The problems such as filter screen local deformation, damaged erosion, extend the service life of rotary sieve.
A backwash process is set to produce multiple pressure it is another object of the present invention to pass through the self-oscillation flow jet flow device
Oscillating jet, equivalent to continuous several times backwash, effectively the circular regeneration efficiency of lifting rotary sieve；The pressure oscillation of generation is penetrated
Stream is continuously transmitted in rotary sieve, can improve the backwash inhomogeneities of filter screen diverse location in the prior art, and can be effective
The granule foreign reduced between web plate is built bridge.Frequency of oscillation can be realized and rotary sieve according to actual condition flexible modulation simultaneously
And fluidic device performance matches.
To achieve the above object, the present invention takes following technical scheme：A kind of frequency modulation type self-oscillation flow jet flow device, it is special
Levy and be：The device includes housing, base plate, vertical jet import, rectification chamber, mixed flow chamber, the jet of tubular opening structure
Outlet and peripheric jet flow import；It is fixedly connected with the base plate at the housing bottom opening；The case top is vertically arranged
There is the vertical jet import, the vertical jet entrance end is connected with counter-flushing pipeline, and the vertical jet import goes out
Mouth end and the rectification chamber for being located at the housing internal upper part；In the housing, below the rectification chamber
Passage and the mixed flow chamber are disposed with, the rectification chamber lower section connects with the feeder connection, the channel outlet
Positioned at mixed flow chamber inlet top, the mixed flow chamber outlet passes the base plate and is connected with the jet exit；Position
Jet integration region is formed between the channel outlet and the mixed flow chamber ingress；Positioned at the channel upper, in housing
Some peripheric jet flow imports connected with the channel upper are arranged at intervals with upper outside wall.
Further, the eddy flow for mixed flow chamber outside being provided with approximately conical structure vibrates wall, the eddy flow
Vibration wall is made up of the integrally formed first vibration wall, the second vibration wall and bottom plectane, the second vibration wall one end and the institute
State mixed flow chamber roof outer wall to be fixedly connected, the second vibration wall other end is connected with described first vibration wall one end, described
The first vibration wall other end is connected with the bottom plectane end, and the bottom plectane ring is located at the mixed flow chamber lower portion.
Further, there is angle α between the first vibration wall and the second vibration wall.
Further, the angle α scope is：90 ° of 180 ° of ＜ α ＜.
Further, the passage streams wall, some vertical training walls and an arc training wall including an annular；By the shell
External wall is inwardly vertical successively to be provided with the annular and streams wall, vertical training wall and arc training wall, some described vertical
Training wall is distributed on and is streamed in the annulus that wall is constituted by the arc training wall and annular；The annular streams wall, vertical water conservancy diversion
Wall and arc training wall one end are each attached to the rectification chamber lower portion, and the other end all extends to lower section in the housing；It is described
Annular is streamed between wall and the housing exterior walls face and forms annular around circulation road, and the annular is around circulation road and the peripheric jet flow
Inlet communication；Circular row fluidic channel is formed between vertical training wall described in two, the press water in the rectifying cavity room is through the ring
Row fluidic channel jet is downstream transmitted；The arc training wall is internally formed central jet passage, the central jet passage
It is axial symmetry chamber, after the press water in the rectifying cavity room enters the central jet passage, by the arc training wall
Transmission downwards.
Further, the annular streams the extension of the development length in the housing more than the vertical training wall of wall
Length, the development length of the development length more than the arc training wall of the vertical training wall.
Further, the arc training wall internal face is integrally formed by several arcwalls, the arc sections of each arcwall
Divide and be the 1/4 of ellipse.
Further, the mixed flow chamber uses rhombus chamber structure.
Further, connected using spherical joint between the mixed flow chamber and the jet exit.
To achieve the above object, the present invention takes another technical scheme：One kind is penetrated based on the frequency modulation type self-oscillation
Flow the application method of device, it is characterised in that comprise the following steps：1) during rotary sieve backwash circular regeneration, self counter flushing is carried out
The pressure water jet of pipeline is entered inside fluidic device by two paths：A part of pressure water jet vertically path by vertically penetrating
Mouth into rectification chamber is flowed into, another part pressure water jet is streamed by peripheric jet flow import along horizontal tangential path into annular
Passage；Transmitted along circular row fluidic channel and central jet channel downstream respectively into the pressure water jet in rectifying cavity room；2)
It is relatively low by fluid velocity after several arcwalls of arc training wall into the jet of central jet passage, flow resistance compared with
Greatly, longitudinal center line is caused to be located away from the fluid velocity of training wall higher than the fluid velocity near training wall, central jet leads to
Exist in road and momentum-exchange is constantly produced between the fluid of speed difference, forming unstable shear layer near the position of training wall,
Fluid around shear layer is entrained forming Axisymmetric Vortex, by the selection amplification of unstable shear layer, shears jet
In with fluid intrinsic frequency be close in the range of vorticity disturbance be amplified, enter incidence when the jet leaves central jet passage
Large scale eddy ring structure will be formed during stream integration region；3) jet into circular row fluidic channel is downstream transmitted, and reaches second
Collided during vibration wall position, produce discrete collar vortex, now due to having been deposited in the fluid shearing layer from central jet passage
In the vorticity disturbance of the composition that is close with fluid intrinsic frequency, vorticity disturbance is revolved with from circular row fluidic channel with described in top
The discrete collar vortex that stream vibration wall is produced when colliding mutually is merged, and is disturbed vorticity in jet integration region and is further exaggerated；4)
Along horizontal tangential path by peripheric jet flow import enter annular around circulation road jet, in annular space along circular path to
Downstream is streamed, and direction will be changed when reaching the first vibration wall position and accelerates to rotate, edge vibration wall upstream direction eddy flow, when
When eddy flow to the first vibration wall and second vibrates the angle alpha position of wall, the mutation of wall angle is vibrated due to eddy flow, make upstream to revolve
The fluid velocity of stream speeds speed and reaches jet integration region suddenly；5) there is a fluid part for vorticity disturbance in jet integration region
With eddy flow collision with wall, another part enter rhombus mixed flow chamber；Wherein with the fluid of eddy flow collision with wall, will be further increased
Vorticity disturbance in integration region, while collide producing vorticity disturbance upstream to reflect, constantly induces new vorticity disturbance；Due to
Corresponding circle of sensation is mutually anti-phase each other with the vorticity disturbance of position of collision, forms the circulation that the new vorticity disturbance of vorticity disturbance-amplification-is produced
Process, causes fluid impedance generating period to change, and completes the tune to " blocking completely ", " part blocks " and " not blocking " of jet
Process processed, strong self-oscillation flow jet flow is ultimately formed in rhombus mixed flow chamber and is sprayed along jet exit.
Due to taking above technical scheme, it has advantages below to the present invention：1st, the frequency modulation type that the present invention is used is from exciting
Swing fluidic device and reach preferable circular regeneration effect, saving energy consumption using relatively low backwashing pressure；Relatively low backwash pressure
Power is also smaller to the impulsive force of rotary sieve, can overcome the problems such as filter screen deformation that stress fatigue triggers and erosion breakage, from
And extend the service life of rotary sieve.2nd, when the present invention is due to backwash, multiple pressure oscillation is produced on filter screen web plate, is made
One time backwash process produces multiple pressure oscillation jet, realizes continuous several times backwash, effectively lifts following for rotary sieve
Ring regeneration efficiency, reduces rotary sieve operation energy consumption.3rd, the present invention is removed the granule foreign of jet blind area using pressure oscillation,
Particulate matter bridge formation problem can effectively be overcome, the circular regeneration efficiency of rotary sieve is improved.4th, the present invention is using regulation from exciting
The method that the eddy flow of fluidic device bottom vibrates wall axial location is swung, the frequency and fluid oscillating frequency phase of the device is realized
Match somebody with somebody, while the spherical joint of jet expansion can also be adjusted as needed, so that jet direction is adjusted flexibly, enable to be applied to
Different operating modes.5th, the frequency modulation type self-oscillation flow jet flow device that the present invention is used is without additional force-driven topology, stationary seal, vibration
Frequency can flexible modulation, realize being effectively matched with rotary sieve characteristic and fluid behaviour.
Brief description of the drawings
Fig. 1 is the structural representation of rotary sieve filter in the prior art；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the through type single tube structure solid jet nozzle schematic diagram that prior art is used；
Fig. 4 is the C-C sectional views in Fig. 3；
Fig. 5 is overall structure diagram of the invention；
Fig. 6 is A-A sectional views in Fig. 5；
Fig. 7 is B-B sectional views in Fig. 5.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.It should be appreciated, however, that the offer of accompanying drawing is only
For a better understanding of the present invention, they should not be interpreted as limitation of the present invention.
As shown in Fig. 5~Fig. 7, the present invention provides a kind of frequency modulation type self-oscillation flow jet flow device, and it is applied to LNG receiving stations
Rotary sieve filter, housing 1 that it includes through type tubular opening structure, base plate 2, vertical jet import 3, rectification chamber 4,
Mixed flow chamber 5, jet exit 6, peripheric jet flow import 7 and eddy flow vibration wall 8；Wherein, consolidate with base plate 2 at the bottom opening of housing 1
Fixed connection, forms enclosed construction.The plan vertical of housing 1 is provided with vertical jet import 3, the vertical arrival end of jet import 3 with it is anti-
Flushing line is connected, and the vertical port of export of jet import 3 is connected with the rectification chamber 4 positioned at the internal upper part of housing 1；Pressure water jet by
Vertical jet import 3 vertically into in rectification chamber 4, the laggard row buffering rectification of rectified chamber 4.In housing 1, whole
The lower section of stream chamber 4 is disposed with passage and mixed flow chamber 5, and the lower section of rectification chamber 4 connects with feeder connection, and channel outlet is located at
The porch of mixed flow chamber 5 top, the outlet of mixed flow chamber 5 passes base plate 2, and is connected with jet exit 6；Positioned at channel outlet with it is mixed
Jet integration region 51 is formed between the stream entrance of chamber 5.Positioned at channel upper, it is arranged at intervals with the upper outside wall of housing 1
Some peripheric jet flow imports 7 connected with channel upper.The eddy flow of approximately conical structure is provided with positioned at the outside of mixed flow chamber 5
Vibration wall 8, eddy flow vibrates wall 8 and is made up of the integrally formed first vibration wall 81, second vibration wall 82 and bottom plectane 83, and second
Vibration one end of wall 82 is fixedly connected with the top exterior walls of mixed flow chamber 5, and the second vibration other end of wall 82 and first vibrates the one end of wall 81
Connection, the first vibration other end of wall 81 is connected with the end of bottom plectane 83, and the ring of bottom plectane 83 is located at the bottom of mixed flow chamber 5.The
There is angle α between the one vibration vibration wall 82 of wall 81 and second, the pressure water jet from peripheric jet flow import 7 vibrates in eddy flow
Circled round on wall 8 and accelerated, mixed flow chamber 5 is entered together with after the jet mixing of passage.
In above-described embodiment, passage streams wall 9, the arc training wall 11 of some vertical training walls 10 and including an annular.
Wall 9, vertical training wall 10 and arc training wall 11 are streamed by the inward-facing annular that is provided with vertical successively of the outer wall of housing 1, it is some to hang down
Straight training wall 10 is distributed on and is streamed in the annulus that wall 9 is constituted by arc training wall 11 and annular.Annular streams wall 9, vertical water conservancy diversion
Wall 10 and the one end of arc training wall 11 are each attached to the bottom of rectification chamber 4, and the other end all extends to lower section in housing 1, and annular
The development length of the development length more than vertical training wall 10 of wall 9 is streamed, the development length of vertical training wall 10 is led more than arc
Flow the development length of wall 11.Wherein, annular is streamed between wall 9 and the outside wall surface of housing 1 and forms annular around circulation road 91, and annular is streamed
Passage 91 is connected with peripheric jet flow import 7, and the press water from each peripheric jet flow import 7 is rotated down along annular around circulation road 91
Stream, direction is changed rapidly when reaching the first vibration 81 position of wall, the upstream eddy flow of wall 81 is vibrated along first.Two vertical training walls
Circular row fluidic channel 101 is formed between 10, the press water in rectification chamber 4 is downstream transmitted through the jet of circular row fluidic channel 101,
The formation for being conducive to large scale to be vortexed when reaching the second vibration 82 position of wall.Arc training wall 11 is internally formed central jet passage
111, central jet passage 111 is axial symmetry chamber, after the press water in rectification chamber 4 enters central jet passage, by arc
The downward transmittance process of shape training wall 11, realizes turbulent mixture, produces momentum-exchange, forms unstable shear layer.
Wherein, the internal face of arc training wall 11 is integrally formed by several arcwalls, and the circular arc portion of each arcwall is equal
It is oval 1/4.
In above-described embodiment, the vertical line in angle α direction streams with annular between the first vibration vibration wall 82 of wall 81 and second
The vertical extended line of wall 9 overlaps.
In the various embodiments described above, mixed flow chamber 5 uses rhombus chamber structure.
In the various embodiments described above, connected using spherical joint 12 between mixed flow chamber 5 and jet exit 6, press water is by penetrating
Flow export 6 sprays, and acts on rotary filter screen plate, the backwash circular regeneration to screen pack is realized, by spherical joint 12
Jet direction can be adjusted.
In the various embodiments described above, used at the bottom opening of housing 1 and base plate 2 between, between base plate 2 and mixed flow chamber 5
Positioning screw 13 is fixedly connected, at the bottom opening of housing 1 and the junction of base plate 2 between and eddy flow vibration wall 8 and the side of housing 1
Seal 14 is provided between wall junction, is easy to dismount and repair and maintenance fluidic device of the invention, by close
The cooperation of sealing 14 and Positioning screw 13, being capable of achieving eddy flow vibration wall 8 can carry out axial location adjustment along seal 14, so that
Reach the purpose of regulation frequency of oscillation.
In the various embodiments described above, the angle α scope between the first vibration vibration wall 82 of wall 81 and second is：90 ° of ＜ α ＜
180°。
In the various embodiments described above, the intrinsic frequency of the self-oscillation flow jet flow of fluidic device of the present invention is according to come frequency of being pulsed in flowing
Rate is configured, and makes the frequency of self-oscillation flow jet flow with upstream oscillating flow frequency as close possible to so that the pressure oscillation for obtaining
Effect.
The present invention also provides a kind of application method of frequency modulation type self-oscillation flow jet flow device, and so-called self-oscillation is exactly leaned on
Fluid sheet produces vibration in fluidic structures, is not necessary to extrinsic motivated device.It is comprised the following steps：
1) during rotary sieve backwash circular regeneration, the pressure water jet from counter-flushing pipeline enters incidence by two paths
Inside stream device：Path enters rectification chamber 4, another part pressure to a part of pressure water jet by vertical fluid import 3 vertically
Power water jet enters annular around circulation road 91 along horizontal tangential path by peripheric jet flow import 7.Pressure into rectification chamber 4
Water jet is downstream transmitted along circular row fluidic channel 101 and central jet passage 111 respectively.
2) jet of central jet passage 111 is entered, by fluid velocity after several arcwalls of arc training wall 11
Relatively low, flow resistance is larger, causes jet that velocity gradient will be produced poor, i.e., longitudinal center line is located away from the fluid speed of training wall
There is continuous generation momentum between the fluid of speed difference in central jet passage 111 higher than the fluid velocity near training wall in degree
Exchange, unstable shear layer is being formed near the position of training wall, the unstability of and shear layer big due to effluxvelocity, shearing
Fluid around layer is entrained forming Axisymmetric Vortex, by the selection amplification of unstable shear layer, in shearing jet with
Fluid intrinsic frequency be close in the range of vorticity disturbance be amplified, enter incidence when the jet leaves central jet passage 111
Large scale eddy ring structure will be formed during stream integration region 51.
3) jet for entering circular row fluidic channel 101 is transmitted to device downstream, is occurred when reaching the second vibration 82 position of wall
Collision, produces series of discrete collar vortex, now due to existing and fluid in the fluid shearing layer from central jet passage 111
Intrinsic frequency be close composition vorticity disturbance, the vorticity disturbance with from circular row fluidic channel with second vibration wall 82 collide when
The series of discrete collar vortex of generation is mutually merged, and is disturbed vorticity in jet integration region 51 and is further exaggerated.
4) jet of the annular around circulation road 91 is entered by peripheric jet flow import 7 along horizontal tangential path, in annular space
Downstream streamed along circular path, will change direction when reaching the first vibration 81 position of wall accelerates rotation, along vibration wall
Upstream direction eddy flow, when eddy flow vibrates the angle alpha position of wall 82 to the first vibration wall 81 and second, because eddy flow vibrates wall
The mutation of 8 angles so that upstream the fluid velocity of eddy flow speeds speed and reaches jet integration region 51 suddenly.
5) there is a fluid part and eddy flow collision with wall for vorticity disturbance in jet integration region 51, another part enters
Rhombus mixed flow chamber 16.Wherein with the fluid of eddy flow collision with wall, because the fluid from annular in circulation road accelerates rotation
Effect, will be further increased the vorticity disturbance in integration region, while collide producing vorticity disturbance upstream to reflect, constantly induce
New vorticity disturbance.Because corresponding circle of sensation is mutually anti-phase each other with the vorticity disturbance of position of collision, vorticity disturbance-amplification-will be formed
The cyclic process that new vorticity disturbance is produced, causes fluid impedance generating period to change, complete " blocking completely " to jet,
" part blocks " and the modulated process of " not blocking ", the process is constantly repeated, and is ultimately formed in rhombus mixed flow chamber 16 strong
Self-oscillation flow jet flow and sprayed along jet exit 6.
In sum, due to realizing fluid sheet in suitable fluidic device present invention employs without extrinsic motivated device
Middle generation oscillation effect, has been reached fluid dynamic energy and has amplified purpose, therefore can realized to rotation using relatively low jet pressure
Turn the backwash of filter screen, determined through experiment, compared to the through type single tube solid jet (jet pressure that prior art is used
0.8MPa-1.0MPa), good backwash effect is capable of achieving when the present invention is only 0.2MPa-0.3MPa using jet pressure,
Due to the reduction of jet pressure, it is possible to reduce the operation energy consumption of supply-water pump, while decreasing the injection high of prior art use
The impact and damage to rotary sieve are flowed, the impact to rotary sieve is greatly reduced, is conducive to extending the operation of rotary sieve
Life-span.
Further, when self-oscillation flow jet flow reaches rotary sieve, pressure oscillation transmission is formed on the web plate of rotary sieve
Effect, is removed the granule foreign of jet blind area using pressure oscillation, can effectively overcome particulate matter bridge formation problem, improves rotation
The circular regeneration efficiency of filter screen.
Result of study shows, when the frequency of self-oscillation flow jet flow is same or like with fluidic device intrinsic frequency, self-excitation
Oscillation effect is obviously improved, and so as to produce the fluid resonant of more preferable effect in mixed flow chamber, is vortexed jet shear layer and becomes
Large scale separating cyclic is vortexed, and this large-sized interrupted collar vortex is conducive to improving the backwash effect to rotary sieve.Rotation
The position of stream vibration wall 8 changes has important influence to the frequency of fluidic device, thus should according to come ripple frequency in flowing come
Design self-oscillation flow jet flow apparatus structure, makes the intrinsic frequency of self-oscillation flow jet flow device as close possible to upstream oscillating flow frequency,
So as to the pressure oscillation effect for obtaining.Therefore, the self-oscillation flow jet flow device of Frequency Adjustable of the present invention, using regulation self-oscillation
The method that the eddy flow of fluidic device bottom vibrates the axial location of wall 8, the frequency and fluid oscillating frequency for realizing the device matches,
Enable to be applied to different operating modes.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and manufacture craft etc. are all
Can be what is be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement should not be excluded
Outside protection scope of the present invention.
Claims (10)
1. a kind of frequency modulation type self-oscillation flow jet flow device, it is characterised in that：The device includes housing, the bottom of tubular opening structure
Plate, vertical jet import, rectification chamber, mixed flow chamber, jet exit and peripheric jet flow import；At the housing bottom opening with
The base plate is fixedly connected；The case top is vertically installed with the vertical jet import, the vertical jet entrance
End is connected with counter-flushing pipeline, and the vertical jet import export end connects with the rectification chamber for being located at the housing internal upper part
It is logical；In the housing, passage and the mixed flow chamber, the rectification chamber are disposed with below the rectification chamber
Lower section connects with the feeder connection, and the channel outlet is located at mixed flow chamber inlet top, and the mixed flow chamber goes out
Mouth passes the base plate and is connected with the jet exit；Formed between the channel outlet and the mixed flow chamber ingress and penetrated
Stream integration region；Positioned at the channel upper, it is arranged at intervals with housing upper lateral wall and some is connected with the channel upper
The logical peripheric jet flow import.
2. a kind of frequency modulation type self-oscillation flow jet flow device as claimed in claim 1, it is characterised in that：Positioned at the mixed flow chamber
Outside is provided with the eddy flow vibration wall of approximately conical structure, and eddy flow vibration wall is by the integrally formed first vibration wall, the
Two vibration walls and bottom plectane are constituted, and described second vibration wall one end is fixedly connected with the mixed flow chamber roof outer wall, described
The second vibration wall other end is connected with described first vibration wall one end, the first vibration the wall other end and the bottom plectane end
Portion connects, and the bottom plectane ring is located at the mixed flow chamber lower portion.
3. a kind of frequency modulation type self-oscillation flow jet flow device as claimed in claim 2, it is characterised in that：It is described first vibration wall with
There is angle α between the second vibration wall.
4. a kind of frequency modulation type self-oscillation flow jet flow device as claimed in claim 3, it is characterised in that：The angle α scope is：
90 ° of 180 ° of ＜ α ＜.
5. a kind of frequency modulation type self-oscillation flow jet flow device as claimed in claim 4, it is characterised in that：The passage includes a ring
Shape streams wall, some vertical training walls and an arc training wall；By the housing exterior walls it is inward-facing successively it is vertical be provided with it is described
Annular streams wall, vertical training wall and arc training wall, some vertical training walls be distributed on by the arc training wall and
Annular is streamed in the annulus of wall composition；The annular stream wall, vertical training wall and arc training wall one end be each attached to it is described
Rectification chamber lower portion, the other end all extends to lower section in the housing；The annular is streamed between wall and the housing exterior walls face
Annular is formed around circulation road, the annular is around circulation road and the peripheric jet flow inlet communication；Between vertical training wall described in two
Circular row fluidic channel is formed, the press water in the rectifying cavity room is downstream transmitted through the circular row fluidic channel jet；It is described
Arc training wall is internally formed central jet passage, and the central jet passage is axial symmetry chamber, in the rectifying cavity room
After press water enters the central jet passage, transmitted downwards by the arc training wall.
6. a kind of frequency modulation type self-oscillation flow jet flow device as claimed in claim 5, it is characterised in that：The annular streams wall
Development length of the development length more than the vertical training wall in the housing, the development length of the vertical training wall is big
In the development length of the arc training wall.
7. a kind of frequency modulation type self-oscillation flow jet flow device as claimed in claim 5, it is characterised in that：In the arc training wall
Wall is integrally formed by several arcwalls, and the circular arc portion of each arcwall is the 1/4 of ellipse.
8. a kind of frequency modulation type self-oscillation flow jet flow device as claimed in claim 1, it is characterised in that：The mixed flow chamber is used
Rhombus chamber structure.
9. a kind of frequency modulation type self-oscillation flow jet flow device as claimed in claim 1, it is characterised in that：The mixed flow chamber and institute
State and connected using spherical joint between jet exit.
10. a kind of application method based on frequency modulation type self-oscillation flow jet flow device as claimed in claim 5, it is characterised in that including
Following steps：
1) during rotary sieve backwash circular regeneration, the pressure water jet from counter-flushing pipeline enters fluidic cartridge by two paths
Put inside：Path enters rectification chamber, another part pressure water-jet to a part of pressure water jet by vertical fluid import vertically
Stream enters annular around circulation road along horizontal tangential path by peripheric jet flow import；Into the pressure water jet difference in rectifying cavity room
Transmitted along circular row fluidic channel and central jet channel downstream；
2) jet of central jet passage, flowing relatively low by fluid velocity after several arcwalls of arc training wall are entered
Resistance is larger, causes longitudinal center line to be located away from the fluid velocity of training wall higher than the fluid velocity near training wall, center
There is continuous generation momentum-exchange between the fluid of speed difference in fluidic channel, unstable cutting is being formed near the position of training wall
Layer is cut, the fluid around shear layer is entrained forming Axisymmetric Vortex, by the selection amplification of unstable shear layer, shearing
Vorticity disturbance in the range of being close with fluid intrinsic frequency in jet is amplified, and enters when the jet leaves central jet passage
Large scale eddy ring structure will be formed during incident flow integration region；
3) jet into circular row fluidic channel is downstream transmitted, and is collided when reaching the second vibration wall position, is produced discrete
Collar vortex, now due to the whirlpool of the existing composition that is close with fluid intrinsic frequency in the fluid shearing layer from central jet passage
Amount disturbance, vorticity disturbance and the discrete collar vortex phase produced when eddy flow vibration wall is collided from circular row fluidic channel and described in top
Mutually fusion, disturbs vorticity and is further exaggerated in jet integration region；
4) jet of the annular around circulation road is entered by peripheric jet flow import along horizontal tangential path, along annular in annular space
Path downstream streams, and will change direction when reaching the first vibration wall position accelerates rotation, along vibration wall upstream direction
Eddy flow, when the angle alpha position of eddy flow to the first vibration wall and the second vibration wall, the mutation of wall angle is vibrated due to eddy flow, is made
Upstream the fluid velocity of eddy flow speeds speed and reaches jet integration region suddenly；
5) there is a fluid part and eddy flow collision with wall for vorticity disturbance in jet integration region, another part is mixed into rhombus
Stream chamber；Wherein with the fluid of eddy flow collision with wall, the vorticity disturbance in integration region will be further increased, while collide producing
Vorticity disturbance is upstream reflected, and constantly induces new vorticity disturbance；Because corresponding circle of sensation is disturbed mutually each other with the vorticity of position of collision
It is anti-phase, the cyclic process that the new vorticity disturbance of vorticity disturbance-amplification-is produced is formed, cause fluid impedance generating period to change, it is complete
The modulated process of " blocking completely ", " part blocks " and " not blocking " of paired jet, ultimately forms in rhombus mixed flow chamber
Strong self-oscillation flow jet flow simultaneously sprays along jet exit.
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| CN107882509A (en) * | 2017-12-19 | 2018-04-06 | 中南大学 | Bottom pressure pulse friction reducer |
| CN109854788A (en) * | 2018-11-27 | 2019-06-07 | 四川嘉泰华动力设备有限公司 | A kind of new-type vibrationproof movable valve |
| CN117398550B (en) * | 2023-12-14 | 2024-03-22 | 清华大学 | Needleless injector |
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| GB1513736A (en) * | 1974-06-18 | 1978-06-07 | Mather & Platt Ltd | Jet assemblies |
| CN101961574A (en) * | 2010-09-17 | 2011-02-02 | 北京沃特林克环境工程有限公司 | Turntable type micro filter |
| CN202113679U (en) * | 2011-04-29 | 2012-01-18 | 江苏国祯环保科技有限公司 | Cleaning nozzle structure of rotary disc filter |
| CN204656125U (en) * | 2015-04-08 | 2015-09-23 | 杭州化工机械有限公司 | A kind of filter disc blowback flow-guiding structure |
| CN205516822U (en) * | 2016-01-21 | 2016-08-31 | 中国海洋石油总公司 | Frequency modulation type self -excited oscillation fluidic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1513736A (en) * | 1974-06-18 | 1978-06-07 | Mather & Platt Ltd | Jet assemblies |
| CN101961574A (en) * | 2010-09-17 | 2011-02-02 | 北京沃特林克环境工程有限公司 | Turntable type micro filter |
| CN202113679U (en) * | 2011-04-29 | 2012-01-18 | 江苏国祯环保科技有限公司 | Cleaning nozzle structure of rotary disc filter |
| CN204656125U (en) * | 2015-04-08 | 2015-09-23 | 杭州化工机械有限公司 | A kind of filter disc blowback flow-guiding structure |
| CN205516822U (en) * | 2016-01-21 | 2016-08-31 | 中国海洋石油总公司 | Frequency modulation type self -excited oscillation fluidic device |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Gas & Power Group Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Gas & Power Group Patentee before: China National Offshore Oil Corporation |