CN107725790B - A kind of catalysis flue gas cuts off the calculation method of butterfly valve and its sealing ring sealing curved surface with high temperature - Google Patents
A kind of catalysis flue gas cuts off the calculation method of butterfly valve and its sealing ring sealing curved surface with high temperature Download PDFInfo
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- CN107725790B CN107725790B CN201710922831.8A CN201710922831A CN107725790B CN 107725790 B CN107725790 B CN 107725790B CN 201710922831 A CN201710922831 A CN 201710922831A CN 107725790 B CN107725790 B CN 107725790B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/224—Details of bearings for the axis of rotation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of catalysis flue gas high temperature to cut off butterfly valve, it includes valve body (1), valve plate (2) and valve shaft (3), medium runner (4) are provided in valve body (1), shaft supporting structure is provided in stepped hole (6), axis positioning ring (10) is fixed in the aperture of stepped hole (6), one end of positioning ring (10) is protruded into medium runner (4), bearing outer ring (8) is set in the macropore of stepped hole (6), spherical groove (13) are offered in bearing outer ring (8), the bearing inner race (7) that can be rotated around spherical groove (13) axis is provided in bearing outer ring (8), the mounting hole (14) through bearing inner race (7) is installed in the middle part of bearing inner race (7).The beneficial effects of the present invention are: it is compact-sized, reliable for operation, sealing is tight, long service life.
Description
Technical field
The present invention relates to cutting butterfly valve structure technical field, especially a kind of catalysis flue gas with high temperature cutting butterfly valve and its
The calculation method of sealing ring sealing curved surface.
Background technique
Currently, the butterfly valve for cutting mainly has single eccentric, double eccentric and three eccentricity structure butterfly valve, and it can be realized gold
Category only has three eccentricity structure to the structure of metal featuring rigid cutting-off.Since the existing metallic seal butterfly valve applied to worst hot case exists
Leakproofness, dexterity of action etc. existing defects, therefore almost without use butterfly valve as featuring rigid cutting-off under worst hot case
Form, but due to the enlargement of modern industry device, the heavy-caliber high-temperature stop valve that one kind in need is compact-sized, light-weight
Door.Existing butterfly valve due to being supported in shafting, sealing pair, in terms of not in conjunction with valve high-temperature operation operating condition rise
Operation requirement when coming, therefore not adapting to higher than 400 DEG C.Because the medium temperature due to circulation is higher, meeting after valve shaft is heated
It in axial direction extending, drives the valve plate being mounted thereon mobile, the sealing ring eventually led on valve plate is closely contacted with valve seat,
Lead to not Open valve, in addition, sealing ring, which gap occurs with valve seat, leads to poorly sealed close, drop after sealing ring long term wear
The service life of low valve.And since circulation medium pressure is higher, valve shaft is badly deformed, and the axle journal at valve shaft both ends is stuck in
In bearing, there is stuck phenomenon, therefore existing cutting butterfly valve can not apply the operation requirement when being higher than 400 DEG C.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology, provide it is a kind of it is structurally reasonable, reliable for operation, sealing is tight
Catalysis flue gas close, with long service life cuts off the calculation method of butterfly valve and its sealing ring sealing curved surface with high temperature.
The purpose of the present invention is achieved through the following technical solutions: a kind of catalysis flue gas high temperature cutting butterfly valve, it includes
Valve body, valve plate and valve shaft are provided with medium runner in the valve body, conical valve seat are provided in medium runner, described
Stepped hole is offered on valve body and positioned at the left and right sides of medium runner, shaft supporting structure, axis support knot are provided in stepped hole
Structure includes that bearing inner race, bearing outer ring, positioning ring, lubricating ester adding set and blow device, positioning ring are fixed on stepped hole
In aperture, one end of positioning ring is protruded into medium runner, and bearing outer ring is set in the macropore of stepped hole, is opened up in bearing outer ring
There is spherical groove, the bearing inner race that can be rotated around spherical groove axis is provided in bearing outer ring, is installed with and passes through in the middle part of bearing inner race
Wear the mounting hole of bearing inner race, mounting hole is connected to positioning ring, be additionally provided on the bearing outer ring inert gas entrance and
It is connected to the lubricating ester slot of spherical groove, is connected with lubricating ester adding set at lubricating ester slot, inert gas entrance is connected to positioning ring
And blow device is connected at inert gas entrance, the axle journal of the valve shaft left and right ends is respectively arranged in two axis supports
Axially disposed flat key is installed in the mounting hole of structure, on valve shaft, sliding slot is offered in the valve plate, valve plate is through cunning
Slot is matched with flat key and is slidably mounted on valve shaft, and the left and right end portions of valve plate are pressed on respectively between two positioning rings, valve plate
Sealing ring with conical valve seat cooperation is installed on outer ring.
Two shaft supporting structures are symmetrical arranged.
The inert gas entrance is between positioning ring and lubricating ester slot.
The calculation method of the sealing ring sealing curved surface of the described high temperature cutting butterfly valve, it the following steps are included:
The calculating of S1, entrance angle, specifically calculate step are as follows: extend conical valve seat, with O1For conical point, with O2For valve
The axis of axis；If the point of contact of sealing ring and conical valve seat upper end is A, the point of contact of sealing ring and conical valve seat lower end is B；It builds
Vertical entrance angle calculates figure；It is by the entrance angle that established entrance angle calculating figure calculates A pointB
Point entrance angle beUnder room temperature operating condition: a1 ≈ a2 >=1~2 °+tan-1f；Under worst hot case: a1
A2 >=7~8 ° ≈+tan-1F, wherein b is O2To the horizontal distance of sealing ring, h O2To the vertical distance of A point, n O2To B point
Vertical distance, q O1O2With O1Angle between A, r O1O2Angle between horizontal plane, f be conical valve seat sealing surface with
Coefficient of friction between sealing ring sealing surfaces, (tan-1It f) is angle of friction；
The calculating of S2, sealing ring high-order sealing curve, specifically calculate step are as follows:
S2 (I), extend A and B point at entrance angle, intersection be O point, X-axis be ∠ AOB angular bisector, Y-axis perpendicular to
X-axis；
S2 (II), according to parabolical definition, the distance of point to focus on parabola is equal to the point to the distance of directrix,
If focus is F (x0,y0), directrix equation l:y=k0x+b0, then parabolic equation are as follows:
Therefore, as long as solving four unknown number x0,y0,k0,b0, this any parabola can be acquired,
S2 (III), the coordinate for setting point of penetration A and B point are respectively A (x1,y1)、B(x2,y2),
By A (x1,y1) substitute into (1) formula obtain:
By B (x2,y2) substitute into (1) formula obtain:
S2 (IV) is due to two tangent lines that OA and OB was O point, then the slope of OA and OB opposite number each other, therefore OA's is oblique
Rate isFormula (1) formula obtains x derivation:
By A (x1,y1) andSubstitution formula formula (4):
By B (x2,y2) andFormula (4) are substituted into obtain:
Joint type formula (2), (3), (5), (6) can acquire parabolic equation, and as sealing ring high-order seals curve；
S3, time that curve is rotated by 360 ° as bus around the axis of symmetry of curve is sealed using the high-order in step S2
Swivel, and the sealing curved surface of sealing ring is obtained by the part other than the excision boundary of boundary of two points of penetration of AB.
The invention has the following advantages that
(1) sealing entrance angle is the key that valve seal pair is not stuck, and by bias cooperation optimization, is obtained reasonable close
Entrance angle is sealed, while the sealing ring of high-order seals curved design, become sealing entrance angle will not after sealing wear
Change, maintains permanent sealing dexterity of action, while ensure that the sealing tightness of valve.
(3) this invention removes cause sealing ring cannot be pinpoint existing with conical valve seat since valve shaft expands with heat and contract with cold
As, therefore ensure that the reliability in the reliability and movement of high and low temperature state lower seal and conical valve seat sealing.
(4) cooperation of the bearing inner race and bearing outer ring of flexural buckling is adapted to, valve shaft is in the dual work of high-temperature high-pressure medium
Under when loaded elastic bending, since valve shaft and bearing inner race have same flexure angle, it ensure that valve shaft still can be free
Flexible rotating.
(5) present invention has the function of medium purging, prevents the located ring of media particle from entering in bearing, avoids and be situated between
The phenomenon that matter particle stuck bearing.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the portion the I partial enlarged view of Fig. 2
Fig. 4 is the structural schematic diagram of shaft supporting structure；
Fig. 5 is that entrance angle calculates figure；
Fig. 6 is the calculating figure that sealing ring high-order seals curve；
In figure, 1- valve body, 2- valve plate, 3- valve shaft, 4- medium runner, 5- conical valve seat, 6- stepped hole, in 7- bearing
Circle, 8- bearing outer ring, 10- positioning ring, 11- lubricating ester adding set, 12- blow device, 13- spherical groove, 14- mounting hole, 15-
Inert gas entrance, 16- lubricating ester slot, 17- flat key, 18- sliding slot, 19- sealing ring.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing, and protection scope of the present invention is not limited to as described below:
As shown in figures 1-4, a kind of catalysis flue gas cuts off butterfly valve with high temperature, it includes valve body 1, valve plate 2 and valve shaft 3, institute
It is provided with medium runner 4 in the valve body 1 stated, is provided with conical valve seat 5 in medium runner 4, on the valve body 1 and is located at medium
The left and right sides of runner 4 offers stepped hole 6, and shaft supporting structure is provided in stepped hole 6, and two shaft supporting structures are symmetrically set
It sets, shaft supporting structure includes bearing inner race 7, bearing outer ring 8, positioning ring 10, lubricating ester adding set 11 and blow device 12, is determined
Position ring 10 is fixed in the aperture of stepped hole 6, and one end of positioning ring 10 is protruded into medium runner 4, and bearing outer ring 8 is set to step
In the macropore in hole 6, spherical groove 13 is offered in bearing outer ring 8, being provided in bearing outer ring 8 can be around the rotation of 13 axis of spherical groove
The spherical groove 13 of bearing inner race 7, the i.e. sphere with bearing outer ring 8 of the outside of bearing inner race 7 matches, and bearing inner race 7 can be in axis
8 any direction of bearing outer-ring is freely rotated, and the mounting hole 14 through bearing inner race 7 is installed in the middle part of bearing inner race 7, installation
Hole 14 is connected to positioning ring 10.Due to freely cooperating for bearing inner race 7 and bearing outer ring 8, valve shaft 3 is in high-temperature high-pressure medium pair
Under recast is used when loaded elastic bending, since valve shaft 3 and bearing inner race 7 have same flexure angle, valve shaft 3 ensure that still
Energy freedom and flexibility rotation, avoids valve shaft from forming interference fit with mounting hole and can not rotate.
Be additionally provided on the bearing outer ring 8 inert gas entrance 15 be connected to the lubricating ester slot 16 of spherical groove 13, it is lazy
Property gas access 15 between positioning ring 10 and lubricating ester slot 16, lubricating ester slot 16 is ring-shaped, is connected at lubricating ester slot 16
Have a lubricating ester adding set 11, thus can by lubrication lubricating ester adding set 11 through lubricating ester slot 16 to bearing inner race 7 and axis
Note ester lubrication is periodically added in 8 contact surface of bearing outer-ring, guarantees the good lubrication of bearing.Inert gas entrance 15 is connected to positioning ring 10
And blow device 12 is connected at inert gas entrance 15, the axle journal of 3 left and right ends of valve shaft is respectively arranged in two
In the mounting hole 14 of shaft supporting structure, axially disposed flat key 17 is installed on valve shaft 3, is offered in the valve plate 2
Sliding slot 18, valve plate 2 are matched with flat key 17 through sliding slot 18 and are slidably mounted on valve shaft 3, and the left and right end portions of valve plate 2 compress respectively
Between two positioning rings 10, the sealing ring 19 cooperated with conical valve seat 5 is installed on 2 outer ring of valve plate.
The course of work of the invention is as follows: when medium to be connected, rotating valve axis 3, due to valve plate 2 and valve shaft 3 it
Between be connected with flat key 17, flat key 17 transmits torque to valve plate 2, and the sealing ring 19 on valve plate 2 is separated with conical valve seat, and medium is led
Logical, after the high-temperature medium of circulation communicates the temperature to valve shaft 3, valve shaft 3 is extended to both ends, since the position of valve plate 2 is
It limiting by two positioning rings 10, valve shaft 3 can only 18 movements be mobile without will drive valve plate 2 along the chute by flat key 17 at this time,
Lead to sealing ring 19 to effectively eliminate valve shaft and expand with heat and contract with cold and the phenomenon that conical valve seat 5 cannot be accurately positioned, avoid
Sealing ring 19 it is stuck on conical valve seat 5 and can not on and off medium, ensure that high and low temperature state lower seal and cone
The reliability of shape valve base sealing and the reliability of movement；When valve working, blow device 12 is through inert gas entrance 15 to calmly
Inert media is blown into the ring 10 of position will not pollute flue gas medium, and inert media is blown out close to shaft end, the particulate matter of positioning ring 10
Medium prevents bearing to be stuck.
The calculation method of the sealing ring sealing curved surface of the described high temperature cutting butterfly valve, it the following steps are included:
The calculating of S1, entrance angle, specifically calculate step are as follows: extend conical valve seat 5, with O1For conical point, with O2For valve
The axis of axis 3；If the point of contact of sealing ring 19 and 5 upper end of conical valve seat is A, sealing ring 19 is cut with 5 lower end of conical valve seat
Point is B；Entrance angle calculating figure is established, as shown in figure 5, wherein dotted line is the extended line of conical valve seat 5；Pass through established incision
The entrance angle that angle calculating figure calculates A point isThe entrance angle of B point is?
Under room temperature operating condition: a1 ≈ a2 >=1~2 °+tan-1f；Under worst hot case: a1 ≈ a2 >=7~8 °+tan-1F, wherein b is O2To close
The horizontal distance of seal 19, h O2To the vertical distance of A point, n O2To the vertical distance of B point, q O1O2With O1Folder between A
Angle, r O1O2Angle between horizontal plane, coefficient of friction of the f between conical valve seat sealing surface and sealing ring sealing surfaces,
(tan-1It f) is angle of friction；
S2, as shown in fig. 6, sealing ring high-order sealing curve calculating, specifically calculate step are as follows:
Entrance angle at S2I, extension A and B point, intersection are O point, and X-axis is the angular bisector of ∠ AOB, and Y-axis is perpendicular to X
Axis；S2II, according to parabolical definition, the distance of point to focus on parabola is equal to the point to the distance of directrix, if focus
For F (x0,y0), directrix equation l:y=k0x+b0, then parabolic equation are as follows:
Therefore, as long as solving four unknown number x0,y0,k0,b0, this any parabola can be acquired,
S2III, the coordinate for setting point of penetration A and B point are respectively A (x1,y1)、B(x2,y2),
By A (x1,y1) substitute into 1 formula obtain:
By B (x2,y2) substitute into 1 formula obtain:
S2IV is due to two tangent lines that OA and OB was O point, then the slope of OA and OB opposite number, therefore the slope of OA each other
For1 formula of formula obtains x derivation:
By A (x1,y1) andSubstitution formula formula 4:
By B (x2,y2) andFormula 4 is substituted into obtain:
Joint type formula 2,3,5,6 can acquire parabolic equation, and as sealing ring high-order seals curve；
S3, time that curve is rotated by 360 ° as bus around the axis of symmetry of curve is sealed using the high-order in step S2
Swivel, and the sealing curved surface of sealing ring is obtained by the part other than the excision boundary of boundary of two points of penetration of AB, it ensure that close
Envelope entrance angle will not change after long term seal abrasion, maintain permanent sealing dexterity of action, ensure that simultaneously
Valve seal pair is not stuck, and extends the service life of valve.
Claims (1)
1. a kind of calculation method of the sealing ring sealing curved surface of high temperature cutting butterfly valve, the high temperature cutting butterfly valve include valve body (1),
Valve plate (2) and valve shaft (3), the valve body (1) is interior to be provided with medium runner (4), is provided with cone valve in medium runner (4)
Seat (5) on the valve body (1) and is located at the left and right sides of medium runner (4) and offers stepped hole (6), sets in stepped hole (6)
It is equipped with shaft supporting structure, shaft supporting structure includes bearing inner race (7), bearing outer ring (8), positioning ring (10), lubricating ester addition dress
(11) and blow device (12) are set, positioning ring (10) is fixed in the aperture of stepped hole (6), and Jie is protruded into one end of positioning ring (10)
In mass flow road (4), bearing outer ring (8) is set in the macropore of stepped hole (6), offers spherical groove (13) in bearing outer ring (8),
It is provided with the bearing inner race (7) that can be rotated around spherical groove (13) axis in bearing outer ring (8), opens up and sets in the middle part of bearing inner race (7)
There is the mounting hole (14) through bearing inner race (7), mounting hole (14) is connected to positioning ring (10), on the bearing outer ring (8)
It is additionally provided with inert gas entrance (15) and is connected with profit at (16) with the lubricating ester slot (16) of spherical groove (13), lubricating ester slot is connected to
Sliding ester adding set (11), inert gas entrance (15), which is connected to positioning ring (10) and is connected at inert gas entrance (15), to be blown
The axle journal of sweeping device (12), the valve shaft (3) left and right ends is respectively arranged in the mounting hole (14) of two shaft supporting structures
It is interior, it is equipped on valve shaft (3) axially disposed flat key (17), offers sliding slot (18), valve plate in the valve plate (2)
(2) it matches and is slidably mounted on valve shaft (3) with flat key (17) through sliding slot (18), the left and right end portions of valve plate (2) compress respectively
Between two positioning rings (10), the sealing ring (19) with conical valve seat (5) cooperation is installed on valve plate (2) outer ring, it is described
Two shaft supporting structures are symmetrical arranged, the inert gas entrance (15) be located at positioning ring (10) and lubricating ester slot (16) it
Between, it is characterised in that: method includes the following steps:
The calculating of S1, entrance angle, specifically calculate step are as follows: extend conical valve seat (5), with O1For conical point, with O2For valve shaft
(3) axis；If the point of contact of sealing ring (19) and conical valve seat (5) upper end is A, under sealing ring (19) and conical valve seat (5)
The point of contact of end is B；Establish entrance angle calculating figure；It is by the entrance angle that established entrance angle calculating figure calculates A pointThe entrance angle of B point isUnder room temperature operating condition: a2 >=1~2 ° a1 ≈+
tan-1f；Under worst hot case: a1 ≈ a2 >=7~8 °+tan-1F, wherein b is O2To the horizontal distance of sealing ring (19), h O2
To the vertical distance of A point, n O2To the vertical distance of B point, q O1O2With O1Angle between A, r O1O2Between horizontal plane
Angle, coefficient of friction of the f between conical valve seat sealing surface and sealing ring sealing surfaces, (tan-1It f) is angle of friction；
The calculating of S2, sealing ring high-order sealing curve, specifically calculate step are as follows:
Entrance angle at S2 (I), extension A and B point, intersection are O point, and X-axis is the angular bisector of ∠ AOB, and Y-axis is perpendicular to X-axis；
S2 (II), according to parabolical definition, the distance of point to focus on parabola is equal to the point to the distance of directrix, if burnt
Point is F (x0,y0), directrix equation l:y=k0x+b0, then parabolic equation are as follows:
Therefore, as long as solving four unknown number x0,y0,k0,b0, this any parabola can be acquired,
S2 (III), the coordinate for setting point of penetration A and B point are respectively A (x1,y1)、B(x2,y2),
By A (x1,y1) substitute into (1) formula obtain:
By B (x2,y2) substitute into (1) formula obtain:
S2 (IV) is due to two tangent lines that OA and OB was O point, then the slope of OA and OB opposite number each other, therefore the slope of OA isFormula (1) formula obtains x derivation:
By A (x1,y1) andSubstitution formula formula (4):
By B (x2,y2) andFormula (4) are substituted into obtain:
Joint type formula (2), (3), (5), (6) can acquire parabolic equation, and as sealing ring high-order seals curve；
S3, the revolving body being rotated by 360 ° using the high-order sealing curve in step S2 as bus around the axis of symmetry of curve,
And the sealing curved surface of sealing ring is obtained by the part other than the excision boundary of boundary of two points of penetration of AB.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710922831.8A CN107725790B (en) | 2017-09-30 | 2017-09-30 | A kind of catalysis flue gas cuts off the calculation method of butterfly valve and its sealing ring sealing curved surface with high temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710922831.8A CN107725790B (en) | 2017-09-30 | 2017-09-30 | A kind of catalysis flue gas cuts off the calculation method of butterfly valve and its sealing ring sealing curved surface with high temperature |
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| CN107725790B true CN107725790B (en) | 2019-05-17 |
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| CN109268513A (en) * | 2018-10-15 | 2019-01-25 | 兰州高压阀门有限公司 | A kind of design of air sealed valve |
| CN109667940B (en) * | 2018-11-21 | 2022-09-02 | 中国北方车辆研究所 | Butterfly valve plate of hydraulic retarder and design method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100287815B1 (en) * | 1998-09-24 | 2002-08-09 | 이종철 | Butterfly valve |
| CN201145061Y (en) * | 2008-01-25 | 2008-11-05 | 沈阳欧科流体控制技术有限公司 | Eccentric rotary valve with antilock device |
| CN202469059U (en) * | 2012-03-07 | 2012-10-03 | 成都华科阀门制造有限公司 | Rotary valve |
| CN202629104U (en) * | 2012-05-31 | 2012-12-26 | 无锡宝牛阀业有限公司 | High-temperature seal butterfly valve |
| CN203670784U (en) * | 2013-12-31 | 2014-06-25 | 山东晨钟机械股份有限公司 | Mounting error self-adaptation sealing device |
| CN204900865U (en) * | 2015-07-10 | 2015-12-23 | 成都华科阀门制造有限公司 | Butterfly vave of flue gas turbine |
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