CN104482233B - Profile design method of valve plug of conical throttle valve with controlled pressure differential characteristics - Google Patents
Profile design method of valve plug of conical throttle valve with controlled pressure differential characteristics Download PDFInfo
- Publication number
- CN104482233B CN104482233B CN201410641760.0A CN201410641760A CN104482233B CN 104482233 B CN104482233 B CN 104482233B CN 201410641760 A CN201410641760 A CN 201410641760A CN 104482233 B CN104482233 B CN 104482233B
- Authority
- CN
- China
- Prior art keywords
- spool
- choke valve
- throttle valve
- valve
- differential pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- 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
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The invention relates to a profile design method of a valve plug of a conical throttle valve with controlled pressure differential characteristics. The profile design method achieves profile design of the valve plug of the throttle valve by controlling the area of a throat of the conical throttle valve, and aims to improve the control capability of profile design of the valve plug of the conical throttle valve in incompressible flow on the pressure differential characteristics of the throttle valve. The profile design method achieves profile design of the valve plug by building the mathematical relational expressions of the relative displacement amount of the conical throttle valve pressure differential in incompressible flow, the area of the throat of the throttle valve, the valve plug of the throttle valve and a casing and controlling the area of the throat at different valve plug positions according to the requirements of the conical throttle valve pressure differential, avoids the repeated circulative iteration process of the traditional design method, can greatly improve the efficiency of profile design of the conical throttle valve, and is applicable to the profile design of the valve plug of the conical throttle valve of the incompressible flow field.
Description
Technical field
The present invention relates to the conical wing valve design field in pipeline flowing, be that one can need according to choke valve differential pressure characteristics
Seeking the method carrying out conical wing valve spool moulding, a kind of conical wing valve controlled differential pressure characteristics spool figure sets specifically
Meter method.
Background technology
In pipeline flows, the use of conical wing valve is the most common, is not only widely used in field of industrial production, also respectively
Class fluid test device is widely applied.The cross section differential static pressure Changing Pattern with throttle valve opening imported and exported by choke valve, also
The i.e. differential pressure characteristics of choke valve, main linear differential pressure characteristics, equal percentage differential pressure characteristics, parabola differential pressure characteristics with open pressure soon
Difference characteristic etc. four kinds.Choke valve under four kinds of differential pressure characteristics correspondences, there is significant difference in its throttling rule changed with aperture, can
Meet the throttling rule demand of different application occasion.And the differential pressure characteristics of choke valve is as its inherent character, depend on choke valve
Spool shape.To this end, how according to the differential pressure characteristics demand of choke valve, designing rational spool shape becomes choke valve and sets
Important step in meter.But, existing conical wing valve spool figure method for designing, use preliminary moulding, differential pressure characteristics core
The loop iteration mode that calculation, moulding optimize, it is impossible to be introduced directly into choke valve differential pressure characteristics in design link to spool figure
Impact, largely limits the efficiency of conical wing valve spool figure design.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of efficient conical wing valve spool figure method for designing, this spool
Method for designing profile is introduced directly into the impact on spool figure of the choke valve differential pressure characteristics in design link, by setting up choke valve
Relationship between pressure reduction, choke valve throat area, throttle valve core and housing relative displacement, it is achieved spool figure is once
Moulding can meet the differential pressure characteristics of choke valve, it is to avoid the process of iterative cycles iteration in traditional design method.Therefore, this
Method for designing can be substantially improved the efficiency of conical wing valve spool figure design.
For realizing above technical purpose, the throttle valve core method for designing profile of the present invention is real by the following technical programs
OK: a kind of conical wing valve controlled differential pressure characteristics spool figure method for designing, described conical wing valve includes housing and spool, institute
The internal face of the profile and housing of stating spool is the surface of revolution, it is characterised in that described spool figure method for designing include as
Lower step:
SS1. according to design requirement determine choke valve differential pressure characteristics, described choke valve differential pressure characteristics be linear differential pressure characteristics,
Equal percentage differential pressure characteristics, parabola differential pressure characteristics or open differential pressure characteristics soon；
SS2. setting up can not baric flow disorder of internal organs conical wing valve pressure differential deltap P, choke valve throat area At, throttle valve core and shell
Relationship between body relative shift L；
SS3. the throat area A under different spool position is determined according to choke valve differential pressure characteristics and described relationshipt；
SS4. around the throat area surface of revolution such as axis structure of throttle valve core under different spool positions, at choke valve
The throat area set of curves such as the bus formation of same vertical section inner spool and each relative displacement of the housing inferior throat area surface of revolution,
The described round circulation area round-formed with choke valve inner walls face aditus laryngis latitude of arbitrary latitude waiting the throat area surface of revolution is equal to should
Choke valve throat area A under positiont；
SS5. to wait internal tangent of throat area set of curves to be constituted throttle valve core in the range of throttle valve core total travel
Surface of revolution bus, thus completes the design of throttle valve core profile.
Wherein, described can not move the flowing into working fluid Mach number Ma≤0.3 by baric flow, described choke valve pressure reduction is entrance
Cross section working fluid average static pressure and the difference of outlet working fluid average static pressure, described entrance section is positioned at choke valve aditus laryngis
At latitude circle upstream 3～5 times of aditus laryngis latitude radius of circles, described outlet is positioned at choke valve aditus laryngis latitude circle downstream 5～10 times of aditus laryngis latitudes
At radius of circle, described choke valve gullet section is the cross section that circulation area is minimum in choke valve fluid passage, described choke valve larynx
Mouth cross section is all by the aditus laryngis latitude circle in choke valve inner walls face in the range of spool total travel, and described aditus laryngis latitude circle is choke valve
Same latitude circle on the choke valve inner walls face that in the range of spool total travel, each gullet section passes through.
Spool figure method for designing of the present invention can meet linearly, equal percentage, parabola with four kinds of pressures such as open soon
Conical wing valve spool figure design under difference characteristic requirements.
The internal flow of described conical wing valve is can not moving by baric flow of Mach number Ma≤0.3.
The spool figure of described conical wing valve is the surface of revolution, and the inner walls face of described conical wing valve is the surface of revolution.
Described choke valve gullet section is all round by the aditus laryngis latitude in choke valve inner walls face in the range of spool total travel,
Same on the choke valve inner walls face that described aditus laryngis latitude circle passes through for each gullet section in the range of throttle valve core total travel
Latitude circle.
Spool figure method for designing of the present invention can not baric flow disorder of internal organs conical wing valve pressure reduction, choke valve by foundation
Relationship between throat area, throttle valve core and housing relative shift, according to the requirement of choke valve differential pressure characteristics
Control the throat area under different spool position, it is achieved the design to throttle valve core profile.
In the design of described spool figure, choke valve pressure differential deltap P and throat area AtMeet Δ P=ρ vout 2·(Aout/At-1)
Relationship, working fluid density, v in wherein ρ is choke valveoutFor choke valve outlet working fluid average speed,
AoutFor choke valve exit area.
In the design of described spool figure, equal percentage differential pressure characteristics choke valve throat area At, spool and housing phase para-position
Shifting amount L meets At=Aout/(eaL+b+ 1) relationship, wherein e is the nature truth of a matter；A, b are constant, by throttle valve core with
Magnitude of pressure differential under housing relative displacement maximum, minimum determines.
In the design of described spool figure, linear differential pressure characteristics/parabola differential pressure characteristics/open differential pressure characteristics choke valve aditus laryngis soon
Area At, spool and housing relative shift L meetWherein n is characteristic coefficient, and n=0 is
Linear differential pressure characteristics, n=1/2 is parabola differential pressure characteristics, and n=-1 is for opening differential pressure characteristics soon；A, b are constant, by choke valve valve
Magnitude of pressure differential under core relative displacement maximum with housing, minimum determines.
In the design of described spool figure, under throttle valve core with housing relative displacement L, around the axis of throttle valve core
The throat area surfaces of revolution such as structure, the described arbitrary latitude circle waiting the throat area surface of revolution and choke valve inner walls face aditus laryngis latitude circle
The circulation area formed is equal to throat area At, at choke valve same vertical section inner spool and the housing inferior aditus laryngis of each relative displacement
The throat area set of curves such as the bus formation of the area surface of revolution.
In the design of described spool figure, throttle valve core profile is the surface of revolution, and the bus of the surface of revolution is that throttle valve core is complete
The internal tangent of throat area set of curves is waited in stroke range.
The conical wing valve controlled differential pressure characteristics spool figure method for designing of the present invention compared with the existing methods relatively just like
Lower beneficial effect: in conical wing valve spool figure designs, by setting up choke valve pressure reduction, choke valve throat area, throttling
Relationship between valve core and housing relative displacement, controls the larynx under different spool position according to choke valve differential pressure characteristics
Open area, and then complete throttle valve core quasi spline, to realize moulding of spool figure, can to meet choke valve pressure reduction special
The requirement of property, it is to avoid the process of iterative cycles iteration in traditional design method, can be substantially improved conical wing valve spool figure
The efficiency of design.
Accompanying drawing explanation
Fig. 1 is conical wing valve three-dimensional vertical section diagram；
Fig. 2 is conical wing valve two dimension vertical section diagram；
Fig. 3 is dimensional parameters schematic diagram in spool figure method for designing of the present invention；
Fig. 4 is spool figure moulding schematic diagram in spool figure method for designing of the present invention；
Detailed description of the invention
For making the technical purpose of the present invention, technical scheme and technological merit be more apparent from, with reference to the accompanying drawings and enumerate reality
Executing example, the present invention is described in more detail.
Fig. 1, Fig. 2 are respectively a typical conical wing valve three-dimensional profilograph, two dimension profilograph.This taper throttles
Valve is constituted axisymmetric fluid passage by spool 1 and housing 2, and wherein spool figure 11 is the surface of revolution, and inner walls face 21 is also
The surface of revolution.Spool 1 can move along the direction shown in double-head arrow in Fig. 1, in spool 1 moving process, on spool figure 11
A certain latitude circle constitutes, with the fixing latitude circle on inner walls face 21, the gullet section 3 (as shown in Figure 2) that circulation area is minimum.This larynx
Mouth cross section 3 is all round by the same latitude in choke valve inner walls face in the range of spool 1 total travel, namely the throttling shown in Fig. 1
Valve chest internal face aditus laryngis latitude circle 22.
Fig. 3 is the dimensional parameters schematic diagram in described throttle valve core method for designing profile, and import cross section 4 is positioned at choke valve
At aditus laryngis latitude circle 5 times, the 22 upstream aditus laryngis latitude radius of circle r of inner walls face, outlet 5 is positioned at choke valve inner walls face aditus laryngis
At latitude circle 10 times of 22 downstream aditus laryngis latitude radius of circle r.Described choke valve pressure differential deltap P is the static pressure in import cross section 4 and outlet 5
Difference, in described spool figure method for designing, choke valve pressure differential deltap P and throat area AtMeet Δ P=ρ vout 2·(Aout/At-1)
Relationship, working fluid density, v in wherein ρ is choke valveoutThe fastest for choke valve outlet 5 working fluid
Degree, AoutArea for choke valve outlet 5.
As a kind of embodiment, such as choosing choke valve differential pressure characteristics is equal percentage characteristics.Described spool figure sets
In meter method, choke valve throat area At, spool 1 meet A with housing 2 relative shift Lt=Aout/(eaL+b+ 1) mathematics closes
Being formula, wherein e is the nature truth of a matter；A, b are constant, by throttle valve core 1 and the pressure reduction under housing 2 relative displacement maximum, minimum
Size determines, is respectively-0.017,3.525；AoutFor choke valve exit area, size is 0.503m2。
Fig. 4 is spool figure moulding schematic diagram in described method for designing, obtains the throat area A of different relative displacement Lt
After, for a certain relative position l of throttle valve core and housingn, the throat area such as axis AX structure around throttle valve core returns
Turn face, the described round circulation area etc. round-formed with choke valve inner walls face aditus laryngis latitude of arbitrary latitude waiting the throat area surface of revolution
In throat area Atn, at choke valve vertical section inner spool relative position l each with housing0、l1、l2……lnUnder, respectively wait throat area
The throat area set of curves s such as the bus formation of the surface of revolution0、s1、s2……sn.Preferably, described throttle valve core profile 11 is back
Turning face, the bus of the surface of revolution is throat area set of curves s such as grade in the range of throttle valve core total travel0、s1、s2……snInscribe
Line.
Numerical result shows, the choke valve that throttle valve core is caused by same displacement amount Δ l in the range of total travel
Pressure reduction relative variation (Δ Pn-ΔPn-1)/ΔPn-1Being 0.75～0.78, maximum relative deviation is 3.8%.Numerical result
Showing, it is special that the throttle valve core profile designed makes described conical wing valve maintain good equal percentage pressure reduction
Property, consistent with the conical wing valve differential pressure characteristics required at the beginning of design.So, conical wing valve spool figure of the present invention sets
Meter method, can preferably control the differential pressure characteristics of choke valve in moulding of spool figure, it is to avoid iterative cycles iteration
Design process, can be substantially improved the efficiency of conical wing valve spool figure design.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. done, within should be included in the scope of the present invention.
Claims (6)
1. a conical wing valve controlled differential pressure characteristics spool figure method for designing, described conical wing valve includes housing and valve
Core, the profile of described spool and the internal face of housing are the surface of revolution, it is characterised in that described spool figure method for designing bag
Include following steps:
SS1. according to design requirement determine choke valve differential pressure characteristics, described choke valve differential pressure characteristics be linear differential pressure characteristics, etc. hundred
Proportion by subtraction differential pressure characteristics, parabola differential pressure characteristics or open differential pressure characteristics soon；
SS2. setting up can not baric flow disorder of internal organs choke valve pressure differential deltap P, choke valve throat area At, throttle valve core and housing phase para-position
Relationship between shifting amount L；
SS3. the choke valve aditus laryngis under different spool position is determined according to described choke valve differential pressure characteristics and described relationship
Area At；
SS4. around the throat area surface of revolution such as axis structure of throttle valve core under different spool positions, same at choke valve
The throat area set of curves such as the bus formation of vertical section inner spool and each relative displacement of the housing inferior throat area surface of revolution, its
In, the described arbitrary latitude circle circulation area round-formed with choke valve inner walls face aditus laryngis latitude waiting the throat area surface of revolution is equal to
Choke valve throat area A under this positiont；
SS5. to wait internal tangent of throat area set of curves to be constituted the revolution of throttle valve core in the range of throttle valve core total travel
Face bus, thus completes the design of throttle valve core profile；
Wherein, described can not move the flowing into working fluid Mach number Ma≤0.3 by baric flow, described choke valve pressure reduction is entrance section
Working fluid average static pressure and the difference of outlet working fluid average static pressure, described entrance section is positioned at choke valve aditus laryngis latitude circle
At upstream 3～5 times of aditus laryngis latitude radius of circles, described outlet is positioned at choke valve aditus laryngis latitude circle downstream 5～10 times of aditus laryngis latitude circles half
At footpath, described choke valve gullet section is the cross section that circulation area is minimum in choke valve fluid passage, and described choke valve aditus laryngis cuts
Face is all by the aditus laryngis latitude circle in choke valve inner walls face in the range of spool total travel, and described aditus laryngis latitude circle is throttle valve core
Same latitude circle on the choke valve inner walls face that in the range of total travel, each gullet section passes through.
Spool figure method for designing the most according to claim 1, is characterized in that: in the design of described spool figure, choke valve
Pressure differential deltap P and throat area AtMeet Δ P=ρ vout 2·(Aout/At-1) relationship, work in wherein ρ is choke valve
Fluid density, voutFor choke valve outlet working fluid average speed, AoutFor choke valve exit area.
Spool figure method for designing the most according to claim 1 and 2, is characterized in that: in the design of described spool figure, wait hundred
Proportion by subtraction differential pressure characteristics choke valve throat area At, spool and housing relative shift L meet At=Aout/(eaL+b+ 1) mathematics closes
Being formula, wherein e is the nature truth of a matter；A, b are constant, and the pressure reduction under relative displacement maximum by throttle valve core and housing, minimum is big
Little determine.
Spool figure method for designing the most according to claim 1 and 2, is characterized in that: in the design of described spool figure, linearly
Differential pressure characteristics/parabola differential pressure characteristics/open differential pressure characteristics choke valve throat area A soont, spool and housing relative shift L full
FootWherein n is characteristic coefficient, and n=0 is linear differential pressure characteristics, and n=1/2 is parabola pressure reduction
Characteristic, n=-1 is for opening differential pressure characteristics soon；A, b are constant, by throttle valve core and the pressure under housing relative displacement maximum, minimum
Difference size determines.
Spool figure method for designing the most according to claim 1 and 2, is characterized in that: in the design of described spool figure, at joint
Under stream valve core and housing relative displacement L, around the throat area surface of revolution such as axis structure of throttle valve core, described wait aditus laryngis
The circulation area that arbitrary latitude circle of the area surface of revolution is round-formed with choke valve inner walls face aditus laryngis latitude is equal to throat area At,
The throat areas such as the bus formation of choke valve same vertical section inner spool and each relative displacement of the housing inferior throat area surface of revolution
Set of curves.
Spool figure method for designing the most according to claim 1 and 2, is characterized in that: in the design of described spool figure, throttling
Valve core profile is the surface of revolution, and the bus of the surface of revolution is the inscribe waiting throat area set of curves in the range of throttle valve core total travel
Line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410641760.0A CN104482233B (en) | 2014-11-06 | 2014-11-06 | Profile design method of valve plug of conical throttle valve with controlled pressure differential characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410641760.0A CN104482233B (en) | 2014-11-06 | 2014-11-06 | Profile design method of valve plug of conical throttle valve with controlled pressure differential characteristics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104482233A CN104482233A (en) | 2015-04-01 |
| CN104482233B true CN104482233B (en) | 2017-01-11 |
Family
ID=52756809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410641760.0A Active CN104482233B (en) | 2014-11-06 | 2014-11-06 | Profile design method of valve plug of conical throttle valve with controlled pressure differential characteristics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104482233B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089855B (en) * | 2016-06-13 | 2017-11-10 | 哈尔滨工业大学 | The hydraulic power optimization method of hydraulic valve |
| CN108240356B (en) * | 2018-01-08 | 2019-06-18 | 中国科学院工程热物理研究所 | A kind of Transonic Axial-flow Compressor casing circumferential slot unitized designing method |
| CN114722513A (en) | 2021-03-02 | 2022-07-08 | 中国石油大学(华东) | Method for designing valve port structure of continuous wave generator oscillation shear valve and oscillation shear valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2279131B (en) * | 1993-06-16 | 1997-06-25 | Seaboard Lloyd Ltd | Choke valve |
| CN2665481Y (en) * | 2003-07-22 | 2004-12-22 | 成都超宇自动化仪表有限责任公司 | Multi-stage throttle high pressure differential adjustable valve |
| CN201351763Y (en) * | 2009-02-23 | 2009-11-25 | 神华集团有限责任公司 | High pressure drop reducing valve |
| CN201377620Y (en) * | 2009-03-05 | 2010-01-06 | 无锡鹰贝精密轴承有限公司 | Valve core of U-shaped groove milled with plane |
| JP5432236B2 (en) * | 2011-01-31 | 2014-03-05 | 株式会社鷺宮製作所 | Throttle valve device |
-
2014
- 2014-11-06 CN CN201410641760.0A patent/CN104482233B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104482233A (en) | 2015-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104482233B (en) | Profile design method of valve plug of conical throttle valve with controlled pressure differential characteristics | |
| Ye et al. | Effects of groove shape of notch on the flow characteristics of spool valve | |
| CN104455471B (en) | Device and the valve cage in the fluid passage of valve for increasing the flow of fluid in valve | |
| CN105302997A (en) | Liquid column separation-bridged water hammer simulation method based on three-dimensional CFD (Computational Fluid Dynamics) | |
| CN203899474U (en) | Novel venturi mixer | |
| CN105164457A (en) | Fluid flow control devices and systems, and methods of flowing fluids therethrough | |
| Guha et al. | Secondary motion in three-dimensional branching networks | |
| Hashid et al. | Discharge characteristics of lateral circular intakes in open channel flow | |
| Liu et al. | Assessment of a turbulence model for numerical predictions of sheet-cavitating flows in centrifugal pumps? | |
| Peng et al. | The CFD analysis of main valve flow field and structural optimization for double-nozzle flapper servo valve | |
| DE102015115409A1 (en) | Process for the design of fluid-flow components | |
| Lin et al. | Effect of cone angle on the hydraulic characteristics of globe control valve | |
| CN106980758A (en) | A kind of quick calculation method of flooding pattern flow field velocity | |
| Frosina et al. | A simulation methodology applied on hydraulic valves for high fluxes | |
| Kyriakopoulos et al. | Hydraulic performance of Howell–Bunger and butterfly valves used for bottom outlet in large dams under flood hazards | |
| CN104455872B (en) | A kind of low flow resistance three-port structure | |
| Li et al. | Review of the Research on and Optimization of the Flow Force of Hydraulic Spool Valves | |
| CN204284645U (en) | A kind of controlled differential pressure characteristics conical wing valve | |
| CN203061080U (en) | Venturi mixer with insert pipe | |
| Liu et al. | Numerical analysis of the diaphragm valve throttling characteristics | |
| Yu et al. | Design and development of turbodrill blade used in crystallized section | |
| Aissa et al. | Experimental and theoretical investigation of water jet pump performance | |
| CN205199331U (en) | Axial telescopic stairstepping venturi blender | |
| Min et al. | Computational fluid dynamics approach to pressure loss analysis of hydraulic spool valve | |
| CN107608930B (en) | Method for calculating backflow length of rear part of hole plug |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |