CN104535121B - A kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner - Google Patents
A kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner Download PDFInfo
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- CN104535121B CN104535121B CN201410850442.5A CN201410850442A CN104535121B CN 104535121 B CN104535121 B CN 104535121B CN 201410850442 A CN201410850442 A CN 201410850442A CN 104535121 B CN104535121 B CN 104535121B
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Abstract
A kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner, including upstream contraction section, downstream diffuser and the aditus laryngis runner that wraps up therebetween；There is the aditus laryngis hole on the aditus laryngis hole of different-diameter, the contracted channel of upstream contraction section and the divergent contour runner of downstream diffuser and aditus laryngis runner to constitute critical flow venturi nozzle on aditus laryngis runner；Aditus laryngis runner is rotated by adjusting handle, so as to choose different aditus laryngis holes to be engaged with contracted channel with divergent contour runner, and then changes critical flow nozzle throat area；The collective effect of adjusting handle combination spring holder, can accurately determine throat location and then determine throat area size；The device can conveniently realize the on-line control of critical flow flow, without cutout, have the advantages that flow adjustment range is wide, fluid trafficability performance is good, flow control accuracy is high, simple in construction, dependable performance, be applicable to high-temperature, high pressure fluid.
Description
Technical field
The invention belongs to fluid control and field of measuring technique, and in particular to a kind of throat area with aditus laryngis runner can
The critical flow venturi nozzle of regulation.
Background technology
Critical flow venturi nozzle is widely used in the control and measurement of fluid flow.For particular fluid, flow through and face
The flow of boundary's stream Venturi nozzle is determined by nozzle inlet flow parameter and nozzle throat area, without what is fluctuated by downstream pressure
Influence.For traditional critical flow venturi nozzle, there is fixed throat area, can only when needing to change critical flow
By changing the parameter of fluid at nozzle inlet, such as stagnation pressure, temperature etc..But when changing intake condition, back pressure is than meeting
Change therewith, or even critical flow condition can not be met.On the other hand, the efflux coefficient of critical flow venturi nozzle is aditus laryngis
The function of Reynolds number, for high reynolds number, its discharge coefficient is substantially constant, now calculates text using one-dimensional non-sticky equation
The critical flow of nozzle is feasible in mound；But for low reynolds number fluid, discharge coefficient changes more apparent with Reynolds number, so
Critical flow is obtained by calculating and just has larger error, or even its flow also can be by downstream when below critical pressure ratio
The influence of pressure oscillation.Therefore, flow is controlled, it is necessary to change with the critical of small throat diameter in order to obtain less critical flow
Venturi nozzle, its operation is wasted time and energy, and reduces operating efficiency.So this paper main purpose designs a kind of new
The adjustable critical flow venturi nozzle of throat area, expands the scope of the control of critical flow flow and measurement.
The mode of common change venturi throat area is one intermediate of insertion, the intermediate and Wen Qiu inside it
In internal face be engaged the annular channel to form variable area.The intermediate can be that cylinder can also be cone：It is right
In the change throat area venturi with cylindrical intermediate, it is necessary to be obtained not by changing the intermediate of different-diameter size
Same circulation area；And for the change throat area venturi with conical intermediate, it usually needs pass through adjusting means control
The movement of intermediate or venturi processed, makes both that relative displacement occur in the axial direction, so as to increase or reduce runner circulation
Area.Such literary mound of change throat area is described in United States Patent (USP) US2552497, US5880378, US 6405577
In.But this structure is due to the presence of intermediate so that its runner dynamics characteristic is poor, while can also destroy venturi expansion
The pressure restitution of section is dissipated, causes the larger pressure loss and parasitic concussion.Particularly with cylindrical intermediate, when regulation spray
Need to interrupt flow of fluid replacing different size intermediates during mouth throat area, this not only wastes time and energy, and also there is many
Technological process does not allow the situation of cutout, limits its application.
Another mode for changing throat area is the wall or wall internal layer of elastic wall surface type, i.e. Venturi nozzle
It is to be made up of elastomeric material, by the pressure effect of either second control fluid of mechanism shape occurs for the elastic wall
Become so that fluid course area changes.Described in United States Patent (USP) US 4096211 and US 4586873 such
Become throat area venturi.Although this mode can keep preferable runner dynamics characteristic, elastomeric material be easy to by
To the corrosion function of the gas (or gas-liquid two-phase fluid) flowed through, especially when operating temperature is higher, elastic performance is deteriorated,
When shrinking, " fold " phenomenon occurs in surface, influences the control of flow area, and then larger mistake also occurs to flow control
Difference.
Other modes for changing Venturi nozzle throat area also have movable wall or movable aditus laryngis formula.United States Patent (USP) US
Change throat area Venturi nozzle described in 4056583, is to set in fan-shaped cavity, the cavity to have in the both sides of rectangular duct
The wall of mobilizable venturi shape of arbor support, throat area can be changed by adjusting their rotation by adjusting rod.
And the change throat area Venturi nozzle described in United States Patent (USP) US 8464582 is throat's two cams of installation in nozzle
The mechanism of formula, by controlling their rotation, the volume for making it into gullet section produces change, and then adjusts the circulation of runner
Area.The runner of the variable area venturi of this movable wall formula activity aditus laryngis is non-round pipe, especially in non-circular throat's meeting
The flow blind angle more more than circular throat is produced, fluid flow performance is poor.
There is knockdown variable area Venturi nozzle in engineering, i.e., replaced by multiple small-sized Venturi nozzle parallel connections
One big nozzle, controls the number of small nozzle switch and closure, to change nozzle by governor motion in the course of the work
The circulation area of combination.Because this method can cause device volume huge, and complex, applied at present in engineering compared with
It is few.
The content of the invention
It is in view of the above-mentioned drawbacks of the prior art and not enough, there is aditus laryngis runner it is an object of the invention to provide one kind
The adjustable critical flow venturi nozzle of throat area, it is possible to achieve the on-line control of critical flow, can not only keep good
Fluid trafficability performance, the relatively low pressure loss, and critical flow flow adjustment range is wide is simple in construction, easy to operate, safety
Performance is good；The device is used to adjust critical flow, is applicable not only to normal temperature fluid, is also applied for high-temperature, high pressure fluid.
To achieve the above objectives, the present invention is adopted the following technical scheme that：
A kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner, including be connected by bolt 6
The upstream contraction section 1 and downstream diffuser 2 connect, and wrapped up between upstream contraction section 1 and downstream diffuser 2 have it is multiple
The aditus laryngis runner 3 in different-diameter aditus laryngis hole 31；The diffusion on contracted channel 11 and downstream diffuser 2 on upstream contraction section 1
Aditus laryngis hole 31 on shape runner 21 and aditus laryngis runner 3 constitutes a critical flow venturi nozzle；Aditus laryngis runner 3 can pass through
Adjusting handle 4 is rotated, and is chosen the different aditus laryngis hole 31 of diameter and is engaged with contracted channel 11 and divergent contour runner 12, is come
Change critical flow venturi nozzle throat area；Spring holder 5 can accurately determine the position of aditus laryngis runner 3 in rotation process
Put, and aditus laryngis runner 3 is fixed during nozzle operation.
The upstream contraction section 1 is in the form of annular discs, and the first aditus laryngis pulley groove 12 is provided with the downstream of its contracted channel 11,
The dowel hole 13 run through is provided with the first aditus laryngis pulley groove 12, in upstream the exit end face of contraction section 1 have with it is described
The upstream contraction section flange 14 that downstream diffuser 2 is connected, inlet end face has the suction flange 15 being connected with pipeline, described to receive
There is the first O-ring seal groove 111, wherein being embedded with the first O-ring seal 72 around the outlet 112 of contracting shape runner 11；Described
There is the second O-ring seal of twice groove 121, wherein being embedded with the second O-shaped sealing around the downstream end face of first aditus laryngis pulley groove 12
Circle 71；
The downstream diffuser 2 is in the form of annular discs, and the second aditus laryngis pulley groove 22 is provided with the upstream of its divergent contour runner 21,
The aditus laryngis runner axis hole 23 run through is provided with the second aditus laryngis pulley groove 22, in downstream the inlet end face of diffuser 2 have with
The corresponding downstream diffuser flange 24 of the upstream contraction section flange 14, exit end face has the outlet(discharge) flange being connected with pipeline
25, there is the 3rd O-ring seal groove 211, wherein being embedded with the 3rd O-ring seal around the import 212 of the divergent contour runner 21
73；In downstream, the Way out lower surface of diffuser 2 has indicator 26；
The aditus laryngis runner 3, its size is adapted simultaneously with the first aditus laryngis pulley groove 12 and the second aditus laryngis pulley groove 22
It can freely be rotated in chamber of the two composition, running through for multiple different shape sizes is disposed with the circumference of aditus laryngis runner 3
Aditus laryngis hole 31, all fluted 32 to reduce pivoting friction resistance in the middle part of the both ends of the surface of aditus laryngis runner 3, and the center of groove 32 has
Axle 33, axle 33 is inserted in the aditus laryngis runner axis hole 23 for being provided with and running through in the second aditus laryngis pulley groove 22, then by installed in
Adjusting handle 4 on axle 33 rotates aditus laryngis runner 3；It is disposed with circumference between aditus laryngis hole 31 and axle 33 and each aditus laryngis
The corresponding positioning hole 34 in hole 31, makes positioning hole 34 with being opened in the first aditus laryngis pulley groove 12 by rotating aditus laryngis runner 3
There is the centering of dowel hole 13 run through, then be engaged by spring holder 5 with dowel hole 13 aditus laryngis runner 3 is consolidated
It is fixed；There is the O-ring seal groove of twice the 4th on the axle 33, and be embedded with the 4th O-ring seal 74.
Each described aditus laryngis hole 31 is uniformly distributed or non-uniform Distribution in the circumference of aditus laryngis runner 3, but two adjacent aditus laryngis holes
The distance between 31 are less than the diameter of the outlet 112 of the contracted channel 11, again smaller than entering for the divergent contour runner 21
The diameter of mouth 212.
The aditus laryngis hole 31 also be contraction structure, its by throat's contraction section 311 positioned at the one end of contracted channel 11, be located at
Throat's diffuser 312 and throat's flat segments 313 of the one end of divergent contour runner 21 are constituted；The throat in each aditus laryngis hole 31 receives
The inlet diameter D of contracting section 311tiThe diameter of outlet 112 that is equal and being equal to contracted channel 11；Each described aditus laryngis hole 31
Throat's diffuser 312 outlet diameter DtoThe diameter of import 212 that is equal and being equal to divergent contour runner 21；It is described each
The diameter D of throat's flat segments 313 in aditus laryngis hole 31tIt is different.
The import and export end face in each aditus laryngis hole 31 is respectively arranged with import O-ring seal groove 314 and exports O-shaped sealing
Ring recess 315, and O-ring seal is embedded with, in this case, first around the outlet 112 of the contracted channel 11 is O-shaped close
The 3rd O-ring seal groove 211 around the import 212 of seal groove 111 and the divergent contour runner 21 is then saved.
The surface of adjusting handle 4 has the scale for indicating corresponding aditus laryngis hole 31, when adjusting venturi throat area
It is accurate to determine throat area size and location with reference to indicator 26 and the collective effect of spring holder 5；Adjusting handle 4
It can be controlled by micro-processor controlled motor；The surface of spring holder 5 has the 5th O-ring seal groove, and is embedded with
5th O-ring seal 75, in the Venturi nozzle course of work, its end is engaged with positioning hole 34.
The present invention places a rotary aditus laryngis runner 3 using in the middle of upstream contraction section 1 and downstream diffuser 2,
There is the aditus laryngis hole 31 of multiple different-diameters, such contracted channel 11 and divergent contour runner 21 and aditus laryngis on aditus laryngis runner 3
Hole 31, constitutes a critical flow venturi nozzle.Coordinate the effect of spring holder 5 by adjusting handle 4, rotate aditus laryngis and turn
Wheel 3 can select different aditus laryngis holes, and then change the throat area of critical flow nozzle, obtain different critical flows.With showing
There is technology to compare, have the following advantages that：
(1) critical flow is easy to adjust.Want adjust critical flow, without change nozzle upstream fluid parameter, also without
Flow of fluid must be interrupted, it is only necessary to rotate aditus laryngis runner so that shape and divergent contour runner are shunk in the aditus laryngis hole alignment of correspondence diameter
.This regulative mode avoid regulation nozzle upstream fluid parameter when due to back pressure than rise there is sub-critical flow state
Situation, and the scope of critical flow Flow-rate adjustment can be greatly improved using various sizes of aditus laryngis hole.
(2) fluid trafficability performance is excellent.The runner of the throat area adjustable threshold flow nozzle and the fixed aditus laryngis of tradition
Area critical flow venturi nozzle is similar, is circular pipe, typically without the presence of intermediate or movable wall, gullet section
It is still circle, Venturi nozzle interior flow field will not be destroyed, it is to avoid parasitic concussion and flow blind angle, with good stream
Body trafficability performance, this also reduces the pressure loss simultaneously.
(3) flow control is accurate.Because the diameter in each aditus laryngis hole is determined in advance, so in critical flow venturi nozzle work
The area of aditus laryngis just can be accurately obtained during work, without the meter as existing change throat area technology by complexity
Calculate, be also not in as elastic wall surface type variable area Venturi nozzle, because elastic wall is sent out by itself Fluid pressure
Raw deformation causes throat area to be difficult to situation about determining, substantially increases the precision of critical flow control and measurement.
(4) have a wide range of application.The adjustable critical flow venturi nozzle of throat area, with good sealing side
Formula, not only can apply to normal temperature fluid, can also apply to high-temperature, high pressure fluid.Meanwhile, be also not in that elastic wall surface type such as becomes
Area Venturi nozzle that the problem of when high-temperature, high pressure fluid passes through, elastomeric material fails, its is firm in structure, service behaviour
Reliably.
Brief description of the drawings
Fig. 1 is the adjustable critical flow venturi nozzle sectional view of throat area with aditus laryngis runner.
Fig. 2 is the adjustable critical flow venturi nozzle stereoscopic figure of throat area with aditus laryngis runner.
Fig. 3 is the adjustable critical flow venturi nozzle explosive view of throat area with aditus laryngis runner.
The upstream contraction section knot of Fig. 4 adjustable critical flow venturi nozzles of throat area with aditus laryngis runner for described in
Structure schematic diagram.
The downstream diffuser knot of Fig. 5 adjustable critical flow venturi nozzles of throat area with aditus laryngis runner for described in
Structure schematic diagram.
Fig. 6 a be the aditus laryngis rotaring wheel structure schematic diagram, Fig. 6 b be Fig. 6 a along A-A to sectional view.
Fig. 7 is close for another aditus laryngis of the adjustable critical flow venturi nozzle of throat area with aditus laryngis runner
Seal schematic diagram.
The adjusting handle structure of Fig. 8 adjustable critical flow venturi nozzles of throat area with aditus laryngis runner for described in
Schematic diagram.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
Such as Fig. 1, Fig. 2, shown in Fig. 3, a kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner,
Including upstream contraction section 1, downstream diffuser 2, and the aditus laryngis with multiple different-diameter aditus laryngis holes 31 wrapped up therebetween
Runner 3.On divergent contour runner 21 on contracted channel 11 and downstream diffuser 2 and aditus laryngis runner 3 on upstream contraction section 1
Aditus laryngis hole 31 constitute a critical flow venturi nozzle.By adjusting handle 4, and coordinate indicator 26 and spring holder
5, aditus laryngis runner 3 can be rotated choose different aditus laryngis holes 31 and be engaged with contracted channel 11 and divergent contour runner 21, with
To the critical flow nozzle of different throat areas.Spring holder 5 can accurately determine the position of aditus laryngis runner 3 in rotation process,
And aditus laryngis runner 3 is fixed during nozzle operation.Upstream contraction section 1 is connected with downstream diffuser 2 by bolt 6
Connect, and critical flow venturi nozzle is connected by flange 15 and flange 25 with upstream and downstream pipeline respectively.Second O-ring seal 71 can
To realize the static seal inside critical flow nozzle with external environment in the presence of bolt；First O-ring seal 72 can be prevented
Crack outflow of the fluid between aditus laryngis pulley groove 12 and aditus laryngis runner 3, it is ensured that the fluid in the critical flow nozzle course of work
All flowed through from aditus laryngis hole 31；3rd O-ring seal 73 can prevent fluid between aditus laryngis pulley groove 22 and aditus laryngis runner 3
Crack outflow；4th O-ring seal 74 can realize the rotary seal between axle 33 and axis hole 23, prevent fluid out of nozzle
Overflow in portion；5th O-ring seal 75 can realize being slidingly sealed between spring holder 5 and dowel hole 13.
As shown in figure 4, upstream contraction section 1 is in the form of annular discs, with contracted channel 11, opened in the downstream of contracted channel 11
There is the first aditus laryngis pulley groove 12, the dowel hole 13 run through is provided with the first aditus laryngis pulley groove 12.Under contraction section 1
Trip end face has the upstream contraction section flange 14 being connected with the downstream diffuser 2, and upstream face has what is be connected with pipeline
Suction flange 15.There is the first O-ring seal groove 111, wherein being embedded with the first O around the outlet 112 of the contracted channel 11
Type sealing ring 72.In described state there is the second O-ring seal of twice groove 121 around the downstream end face of the first aditus laryngis pulley groove 12,
Wherein it is embedded with the second O-ring seal 71.
As shown in figure 5, downstream diffuser 2 is in the form of annular discs, with divergent contour runner 21, opened in the upstream of divergent contour runner 21
There is the second aditus laryngis pulley groove 22, the aditus laryngis runner axis hole 23 run through is provided with the second aditus laryngis pulley groove 22.In diffuser 2
Inlet end face there is the downstream diffuser flange 24 that matches with the upstream contraction section flange 14, exit end face has and pipe
The outlet(discharge) flange 25 of road connection.There is the 3rd O-ring seal groove 211, wherein embedding around the import 212 of the divergent contour runner 21
There is the 3rd O-ring seal 73.In downstream, the Way out lower surface of diffuser 2 has indicator 26.
As shown in figures 6 a and 6b, the aditus laryngis runner 3, its size turns with the first aditus laryngis pulley groove 12 and the second aditus laryngis
Wheel groove 22 is adapted and can freely rotated in chamber of the two composition, and running through for different shape size is disposed with circumference
Aditus laryngis hole 31, all fluted 32 to reduce pivoting friction resistance in the middle part of the both ends of the surface of aditus laryngis runner 3, and the center of groove 32 has
Axle 33, axle 33 is inserted in the aditus laryngis runner axis hole 23 for being provided with and running through in the second aditus laryngis pulley groove 22, then by installed in
Adjusting handle 4 on axle 33 rotates aditus laryngis runner 3；In upstream face groove 32, the arrangement between aditus laryngis hole 31 and axle 33
There is the positioning hole 34 corresponding with each aditus laryngis hole 31, positioning hole 34 is turned with first aditus laryngis by rotating aditus laryngis runner 3
The centering of dowel hole 13 run through is provided with wheel groove 12, then is engaged by spring holder 5 with dowel hole 13 to aditus laryngis
Runner 3 is fixed.The distance between two adjacent aditus laryngis holes 31 are less than the diameter of the outlet 112 of the contracted channel 11,
Less than the diameter of the import 212 of the divergent contour runner 21, prevent occurring blocking phenomenon during Flow-rate adjustment.The axle 33
It is upper that there is the O-ring seal groove of twice the 4th, and it is embedded with the 4th O-ring seal 74.The aditus laryngis hole 31 also be contraction structure, its by
Throat's contraction section 311, throat's diffuser 312 and throat's flat segments 313 are constituted.Throat's contraction section in each aditus laryngis hole 31
311 inlet diameter DtiThe diameter of outlet 112 that is equal and being equal to contracted channel 11.The larynx in each aditus laryngis hole 31
The outlet diameter D of portion's diffuser 312toThe diameter of import 212 that is equal and being equal to divergent contour runner 21.Each described aditus laryngis
The throat flat segments diameter D in hole 31tIt is different.The import of throat's contraction section 311 in aditus laryngis hole 31 and contracted channel 11
Outlet 112 is engaged, and the outlet of throat's diffuser 312 is engaged with the import 212 of divergent contour runner 21.
As shown in fig. 7, the import and export end face in each aditus laryngis hole 31 can also be respectively arranged with import O-ring seal groove 314
With outlet O-ring seal groove 315, and O-ring seal is embedded with, in this case, around the outlet 112 of contracted channel 11
The 3rd O-ring seal groove 211 around the import 212 of first O-ring seal groove 111 and the divergent contour runner 21 can be saved
Go.
As shown in figure 8, the surface of adjusting handle 4 has the scale for indicating corresponding aditus laryngis hole.In regulation venturi aditus laryngis face
It is accurate to determine throat area size and location with reference to indicator 26 and the collective effect of spring holder 5 during product.Adjusting handle
4 can also be controlled in figure by micro-processor controlled motor and not indicate.
In the critical flow venturi nozzle course of work, contracted channel 11 adds throat's contraction section 311 in aditus laryngis hole 31
The constriction of Venturi nozzle is together constituted, and divergent contour runner 21 is common plus throat's diffuser 312 in aditus laryngis hole 31
The diffusion part of Venturi nozzle is constituted, and throat's flat segments 313 in aditus laryngis hole 31 are actually active venturi throat.When
Need to adjust critical flow, when changing effective throat area, its operating procedure is：Spring holder 5 is extracted laterally, rotates larynx
Mouthful runner, according to adjusting handle 4 and the indicative function of indicator 26, in the trip spring alignment pin 5 close near target location,
In the presence of spring force, spring holder 5 can realize the accurate determination to the position of aditus laryngis runner 3.
Novel throat opening area adjustable threshold stream Venturi nozzle involved in the present invention, according to flow control and regulation
It is required that, the conventional corresponding aditus laryngis size of critical flow is focused on aditus laryngis runner 3, can be in critical flow nozzle inlet fluid
In the case of parameter constant, different aditus laryngis holes and contracted channel 11 and divergent contour runner are changed by rotating aditus laryngis runner 3
21 are engaged, and realize on-line control of the critical flow in the case where that need not interrupt flow of fluid.Its flow adjustment range is wide, knot
Structure is simple, and dependable performance is stable, easy to operate, and is a kind of critical in engineer applied field suitable for high-temperature, high pressure fluid
Flow-rate adjustment and effective utility unit of control.For example, as a kind of special case, the layering note of heavy crude heat extraction in petroleum works field
In vapour, with reference to Chinese patent CN201110398076.0 or Chinese patent CN 200810232020.6, using institute in the present invention
The critical flow nozzle of discussion can control the flow of each distribution branch road steam, in that context it may be convenient to which each bypass flow is adjusted,
Situation about being interfered when being not in Flow-rate adjustment between each branch road.
Claims (7)
1. a kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner, it is characterised in that：Including passing through
Upstream contraction section (1) and downstream diffuser (2) that bolt (6) is connected, and in upstream contraction section (1) and downstream diffuser
(2) the aditus laryngis runner (3) with multiple different-diameter aditus laryngis holes (31) wrapped up between；Contraction shape on upstream contraction section (1)
The aditus laryngis hole (31) on divergent contour runner (21) and aditus laryngis runner (3) on runner (11) and downstream diffuser (2) is constituted
One critical flow venturi nozzle；Aditus laryngis runner (3) can be rotated by adjusting handle (4), choose the different larynx of diameter
Oral pore (31) is engaged with contracted channel (11) and divergent contour runner (12), to change critical flow venturi nozzle aditus laryngis face
Product；Spring holder (5) can accurately determine the position of aditus laryngis runner (3) in rotation process, and during nozzle operation
Aditus laryngis runner (3) is fixed.
2. a kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner according to claim 1,
It is characterized in that：The upstream contraction section (1) is in the form of annular discs, and the first aditus laryngis runner is provided with the downstream of its contracted channel (11)
Groove (12), is provided with the dowel hole (13) run through in the first aditus laryngis pulley groove (12), the outlet of contraction section (1) in upstream
End face has the upstream contraction section flange (14) being connected with the downstream diffuser (2), and inlet end face has to be connected with pipeline
Suction flange (15), there is the first O-ring seal groove (111) around the outlet (112) of the contracted channel (11), wherein
It is embedded with the first O-ring seal (72)；Have twice second O-shaped close around the first aditus laryngis pulley groove (12) downstream end face
Seal groove (121), wherein being embedded with the second O-ring seal (71)；
The downstream diffuser (2) is in the form of annular discs, and the second aditus laryngis pulley groove is provided with the upstream of its divergent contour runner (21)
(22) the aditus laryngis runner axis hole (23) run through, is provided with the second aditus laryngis pulley groove (22), the import of diffuser (2) in downstream
End face has the downstream diffuser flange (24) corresponding with the upstream contraction section flange (14), and exit end face has and pipeline
There is the 3rd O-ring seal groove (211) around the outlet(discharge) flange (25) of connection, the import (212) of the divergent contour runner (21),
Wherein it is embedded with the 3rd O types sealing ring (73)；In downstream, the Way out lower surface of diffuser (2) has indicator (26)；
The aditus laryngis runner (3), its size is adapted with the first aditus laryngis pulley groove (12) and the second aditus laryngis pulley groove (22)
And can freely be rotated in the chamber of the two composition, it is disposed with passing through for multiple different shape sizes in aditus laryngis runner (3) circumference
The aditus laryngis hole (31) worn, all fluted (32) are to reduce pivoting friction resistance, groove (32) in the middle part of aditus laryngis runner (3) both ends of the surface
Center has axle (33), and axle (33) inserts in the second aditus laryngis pulley groove (22) and is provided with the aditus laryngis runner axis hole run through
(23) in, then by the adjusting handle (4) on axle (33) make aditus laryngis runner (3) rotate；In aditus laryngis hole (31) and axle
(33) positioning hole (34) corresponding with each aditus laryngis hole (31) is disposed with the circumference between, by rotating aditus laryngis runner (3)
Make positioning hole (34) and be provided with dowel hole (13) centering run through in the first aditus laryngis pulley groove (12), then pass through spring
Alignment pin (5) is engaged with dowel hole (13) and aditus laryngis runner (3) is fixed；There is the O of twice the 4th on the axle (33)
Type seal groove, and it is embedded with the 4th O-ring seal (74).
3. a kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner according to claim 2,
It is characterized in that：Each described aditus laryngis hole (31) is uniformly distributed or non-uniform Distribution in aditus laryngis runner (3) circumference, but two adjacent
The distance between aditus laryngis hole (31) is less than the diameter of the outlet (112) of the contracted channel (11), again smaller than the diffusion
The diameter of the import (212) of shape runner (21).
4. a kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner according to claim 2,
It is characterized in that：The aditus laryngis hole (31) is also contraction structure, and it is by throat's contraction section positioned at contracted channel (11) one end
(311), the throat's diffuser (312) and throat's flat segments (313) positioned at divergent contour runner (21) one end are constituted；It is described each
The inlet diameter D of throat's contraction section (311) in aditus laryngis hole (31)tiOutlet that is equal and being equal to contracted channel (11)
(112) diameter；The outlet diameter D of throat's diffuser (312) in each aditus laryngis hole (31)toIt is equal and be equal to diffusion
The diameter of the import (212) of shape runner (21)；The diameter D of throat's flat segments (313) in each aditus laryngis hole (31)tRespectively not
It is identical.
5. a kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner according to claim 2,
It is characterized in that：The import and export end face in each aditus laryngis hole (31) is respectively arranged with import O-ring seal groove (314) and outlet
O-ring seal groove (315), and O-ring seal is embedded with, in this case, outlet (112) week of the contracted channel (11)
The 3rd O-ring seal groove around the import (212) of the first O-ring seal groove (111) and the divergent contour runner (21) that enclose
(211) then save.
6. a kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner according to claim 2,
It is characterized in that：Adjusting handle (4) surface has the scale for indicating corresponding aditus laryngis hole (31), in regulation venturi aditus laryngis
Indicator (26) and the collective effect of spring holder (5) are combined during area, it is accurate to determine throat area size and location；Adjust
Section handwheel (4) can be also controlled by micro-processor controlled motor.
7. a kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner according to claim 2,
It is characterized in that：Spring holder (5) surface has the 5th O-ring seal groove, and is embedded with the 5th O-ring seal (75),
In the Venturi nozzle course of work, its end is engaged with positioning hole (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850442.5A CN104535121B (en) | 2014-12-31 | 2014-12-31 | A kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850442.5A CN104535121B (en) | 2014-12-31 | 2014-12-31 | A kind of adjustable critical flow venturi nozzle of throat area with aditus laryngis runner |
Publications (2)
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| CN104535121A CN104535121A (en) | 2015-04-22 |
| CN104535121B true CN104535121B (en) | 2017-09-12 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105607668A (en) * | 2015-12-21 | 2016-05-25 | 北京航天益森风洞工程技术有限公司 | Air flow regulator |
| CN107504238B (en) * | 2017-07-31 | 2019-04-02 | 长江大学 | The adjustable machinery of critical flow is jammed venturi nozzle |
| CN109966902B (en) * | 2019-01-23 | 2021-11-30 | 国能(山东)能源环境有限公司 | Vane type variable diameter venturi throat |
| CN110361059B (en) * | 2019-07-03 | 2021-05-18 | 中国计量大学 | Automatic loading device for air quantity detection pore plate of range hood |
| CN110984935B (en) * | 2019-12-12 | 2024-06-18 | 中国石油化工股份有限公司 | Intelligent regulation and control device for steam of ground steam injection pipe network of oil field |
| CN113741557A (en) * | 2020-05-27 | 2021-12-03 | 中国石油化工股份有限公司 | Ground wet steam critical flow control method and device |
| CN114412845B (en) * | 2022-01-28 | 2022-08-26 | 成都图尔思科技有限公司 | Adjustable jet pump |
| CN114788978B (en) * | 2022-05-07 | 2024-04-12 | 长沙有色冶金设计研究院有限公司 | Novel pressure leaching process tail gas treatment device and method |
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| JP5093548B2 (en) * | 2005-11-29 | 2012-12-12 | Ｓｍｃ株式会社 | Metering device |
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Patent Citations (6)
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| GB761990A (en) * | 1953-10-29 | 1956-11-21 | Kent Ltd G | Pressure differential producing device |
| CN2518083Y (en) * | 2002-01-29 | 2002-10-23 | 沈复中 | Single-bar spiral plate type and advanced valve type aperture plate throttling gear |
| EP2072971A1 (en) * | 2007-12-17 | 2009-06-24 | Services Pétroliers Schlumberger | Variable throat venturi flow meter |
| CN201402158Y (en) * | 2009-05-07 | 2010-02-10 | 西安热工研究院有限公司 | Integrated type pressure sampling device for measuring flow of pipeline |
| CN101716564A (en) * | 2009-11-24 | 2010-06-02 | 江苏大学 | Rocker-arm nozzle outlet regulating device |
| CN103851041A (en) * | 2014-03-10 | 2014-06-11 | 西安交通大学 | Critical incompressible fluid flow device with adjustable flow |
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| CN104535121A (en) | 2015-04-22 |
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