CN106641355B - A method of realizing that elastic valve combination body device seals firmly - Google Patents
A method of realizing that elastic valve combination body device seals firmly Download PDFInfo
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- CN106641355B CN106641355B CN201611140646.5A CN201611140646A CN106641355B CN 106641355 B CN106641355 B CN 106641355B CN 201611140646 A CN201611140646 A CN 201611140646A CN 106641355 B CN106641355 B CN 106641355B
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- bellows
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
Abstract
The invention belongs to aviation airborne equipment technical fields, and in particular to a method of realize that elastic valve combination body device seals firmly.The invention mainly comprises the grindings of bellows cover upper cover sealing surface 10, bellows correction, bellows and bellows cover erection welding, combined bellows part and shell erection welding, housing assembly and case lid erection welding, elastic valve component and valve base, sealing ring assembly, determine soldering and sealing pressure P, the soldering and sealing of pressurising mouth and etc., breach the hard sealing technique bottleneck of the elastic valve combination unit, valve sealing performance qualification rate can be increased to 95% or more by 50% or less, thoroughly solves the hard sealing problem of the elastic valve combination unit, technical solution of the present invention is compared with the existing technology, reduce the technology controlling and process required precision of product, technique exploitativeness is strong, valve sealing performance after assembly, stability is strong, reliability is high.
Description
Technical field
The invention belongs to aviation airborne equipment technical fields, and in particular to a kind of realization elastic valve combination body device is firmly close
The method of envelope.
Background technique
Elastic valve combination unit is to fill using elastic elements such as bellows, bellows as core component with other machinery part
Valve mounting assembly is composed with welding.The device is installed on aircraft oil system, under certain flying height, bellows
Flexible deformation is generated under interior exocoel differential pressure action, is bonded with mechanism other machinery part, and is realized between two fitting parts
Hard sealing.Based on the prior art is calculated by elastic theory, by calculating bellows required load in the case where requiring deformation displacement, really
The size for determining bellows exocoel confining pressure encloses the calculating pressure in erection welding, makes elastic valve combination unit one
Determine to realize hard sealing when flying height.Certain displacement is generated by elastic elements flexible deformations such as bellowss in prior art theory
Afterwards, elastic valve is pushed to close the device for realizing that part seals firmly, the device design theory is feasible, but when technique realization, by wave
The deformation of line tubular elastic is uneven, the not high factor of the assembly accuracy of form and position influences, and makes valve when bellows generates given displacement, no
Whole fittings of all sealing surfaces of valve are able to achieve, to be unable to satisfy the performance that valve closes sealing at a given pressure, sternly
Ghost image rings the job stability of oil system.
Summary of the invention
Goal of the invention：In conjunction with the special characteristic that ripple tubular elastic deforms, propose a kind of hard suitable for elastomeric composition body part
The method that the realization elastic valve combination body device of sealing seals firmly, solves the hard sealing problem of such mechanism.
Technical solution：A method of realizing that elastic valve combination body device seals firmly, the elastic valve assembly dress
Set including case lid 1, valve closing chamber 2, bellows cover 3, valve pressure-sensitive chamber 4, bellows 5, operating pressure chamber 6, valve base 7,
Shell 8, seat sealing surface 9, lid sealing surface 10, pressurising mouth 11, sealing ring 12,5 both ends of bellows respectively with bellows cover 3 and shell
8 resistance weldings；Shell 8 and 1 electron beam welding of case lid；The hole axle of case lid 1 and bellows cover 3 is slidably connected；Valve
Seat 7 by screw assembly connection, is sealed between the two by 12 circumferencial direction of sealing ring with shell 8, assembly back seat sealing surface 9 and lid
The distance between sealing surface 10 is H, and aircraft is maximum value H at groundIt is maximum, when flight arrival requires height, with 5 quilt of bellows
Compression, seat sealing surface 9 are bonded with lid sealing surface 10, at this point, valve arrangement need to be realized by the hard sealing of two fitting part end faces
Sealing；Between case lid 1, bellows cover 3, bellows 5 and shell 8 formed valve closing chamber 2, bellows 5, bellows cover 3 and
Valve pressure-sensitive chamber 4 is formed between valve base 7, the cavity inside valve base 7 is operating pressure chamber 6, when H is not 0, operating pressure
Chamber 6 is communicated with valve pressure-sensitive chamber 4；When aircraft flight is to predetermined altitude, seat sealing surface 9 is bonded with lid sealing surface 10 and realizes hard
Sealing, the chamber of valve pressure-sensitive at this time 4 are connected to the partition of operating pressure chamber 6, guarantee that the pressure of operating pressure chamber 6 no longer reduces；
To realize said effect, proposes to realize the method that elastic valve combination body device seals firmly, include the following steps：
S1：The grinding of 3 upper cover sealing surface 10 of bellows cover：Red copper grinding sleeve bellows cover is used on horizontal high-speed grinding machine
3 upper cover sealing surfaces 10 are ground, and roughness reaches Ra0.8 or more precision；
S2：Bellows 5 corrects：Bellows 5 is corrected, keeps its axis and the nozzle at 5 both ends of bellows concentric；
S3：Bellows 5 and 3 erection welding of bellows cover：To the outer circle that bellows cover 3 and bellows 5 cooperate, according to ripple
The spout diameter size progress reconditioning one by one of pipe 5, keeps the two cooperation close and concentric, then to progress electric resistance welding at cooperation
Form combined bellows part；
S4：The combined bellows part and 8 erection welding of shell that S3 is formed：8 outer circle of shell is clamped with lathe, corrects shell 8
Inner hole guarantee it is concentric with the outer circle of clamping, to the inner hole of shell 8 and the cooperation of bellows 5 according to the nozzle outer diameter of bellows 5
Reconditioning one by one is carried out, both makes cooperation close and bellows cover 3 and concentric according to shell 8, then to progress Resistance Welding at cooperation
It connects to form housing assembly；
S5：The housing assembly and 1 erection welding of case lid that S4 is formed：In the external coated lubrication of the guide rod of case lid 1
Rouge and graphite powder carry out electron beam welding after assembling with bellows cover 3, while carrying out radiating treatment, form elastic valve after welding
Component；
S6：The elastic valve component that S5 is formed combines to form elastic valve assembly with valve base 7, the assembly of sealing ring 12；
S7：It determines soldering and sealing pressure P, carries out according to the following steps：
A) it tests and determines PDifference：It is slowly pressurizeed by 11 pairs of valve closing chambers 2 of pressurising mouth, while measuring the axis of lid sealing surface 10
Displacement of the lines, measurement method are that measurement 10 circumferencial direction of sealing surface is evenly distributed with 3 or more the displacements put respectively at the same pressure, individually
Point continues to pressurize after being bonded stop with seat sealing surface 9, until sealing circumferencial direction each point displacement progressively reaches HIt is maximum, and
When each point displacement difference is 0.03mm~0.10mm, stop pressurization, records the pressure P applied at this timeDifference, it is relative pressure；
B) soldering and sealing pressure P is calculated：Soldering and sealing pressure P is calculated as follows
P=PDifference+PHigh-altitude
Wherein：PHigh-altitudeAtmospheric pressure when for aircraft flight to predetermined altitude, is absolute pressure；
S8：The soldering and sealing of pressurising mouth 11：After vacuumizing to valve closing chamber 2, charged pressure is the helium of P, then by pressurising
Mouth 11 is blocked using argon arc welding, completes the hard sealings of elastic valve combination unit.
Beneficial effect：The present invention breaches the hard sealing technique bottleneck of the elastic valve combination unit, can be close by valve
Sealing property qualification rate is increased to 95% or more by 50% or less, and the hard sealing for thoroughly solving the elastic valve combination unit is asked
Topic, technical solution of the present invention compared with the existing technology, reduce the technology controlling and process required precision of product, technique exploitativeness
By force, the valve sealing performance after assembling, stability is strong, reliability is high.
Detailed description of the invention
Fig. 1 is elastic valve assembly apparatus structure schematic diagram
Wherein, 1- case lid, 2- valve closing chamber, 3- bellows cover, 4- valve pressure-sensitive chamber, 5- bellows, 6- work pressure
Power chamber, 7- valve base, 8- shell, 9- sealing surfaces, 10- lid sealing surface, 11- pressurising mouth, 12- sealing ring.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawings and embodiments, please refers to Fig. 1.
As shown in Figure 1, being this method applicable object, elastic valve combines body device, including case lid 1, valve closing chamber
2, bellows cover 3, valve pressure-sensitive chamber 4, bellows 5, operating pressure chamber 6, valve base 7, shell 8, seat sealing surface 9, lid sealing surface
10, pressurising mouth 11, sealing ring 12,5 both ends of bellows respectively with 8 resistance welding of bellows cover 3 and shell；Shell 8 and case lid 1
Electron beam welding；The hole axle of case lid 1 and bellows cover 3 is slidably connected；Valve base 7 and shell 8 are assembled by screw to be connected
It connects, is sealed between the two by 12 circumferencial direction of sealing ring, assembly the distance between back seat sealing surface 9 and lid sealing surface 10 are H, are flown
Machine is maximum value H at groundIt is maximum, when flight arrival requires height, compressed with bellows 5, seat sealing surface 9 and lid sealing surface
10 fittings, at this point, valve arrangement sealing need to be realized by the hard sealing of two fitting part end faces；
Valve closing chamber 2, bellows 5, bellows cover 3 are formed between case lid 1, bellows cover 3, bellows 5 and shell 8
And valve pressure-sensitive chamber 4 is formed between valve base 7, and the cavity inside valve base 7 is operating pressure chamber 6, when H is not 0, work pressure
Power chamber 6 is communicated with valve pressure-sensitive chamber 4；When aircraft flight is to predetermined altitude, seat sealing surface 9 is bonded and realizes with lid sealing surface 10
Hard sealing, the chamber of valve pressure-sensitive at this time 4 are connected to the partition of operating pressure chamber 6, guarantee that the pressure of operating pressure chamber 6 no longer reduces.It is living
Door seal closed chamber 2 is seal chamber, wherein envelope has the helium of certain pressure, valve pressure-sensitive chamber 4 is communicated with atmosphere, operating pressure chamber 6 and
Lubricating oil pressure chamber communicates.H shown in Fig. 1 is valve opening, is 0~maximum close distance HIt is maximum, maximum close distance HIt is maximumFor ripple
Mounting distance between pipe lid 3 and valve base 7 is designed given by structure.When valve opening H is not closed, i.e., its value is not equal to 0
When, valve pressure-sensitive chamber 4 is connected to operating pressure chamber 6, and two cavity pressures are equal.When aircraft rises to certain altitude, valve
Pressure-sensitive chamber 4 is reduced to relevant pressure with atmospheric pressure, at this point, valve opening under the action of pressure, is compressed in valve closing chamber 2
Bellows 5 drives bellows cover 3 to move to right, and reduces valve opening H, until lid sealing surface 10 and valve base 7 in bellows cover 3
On seat sealing surface 9 be bonded completely, i.e. H=0 realizes the hard sealing of elastic valve combination unit, blocks valve pressure-sensitive chamber 4
It with the channel between operating pressure chamber 6, reduces by 4 pressure of valve pressure-sensitive chamber no longer with 6 pressure reduction of operating pressure chamber, guarantees
Normal pressure needed for the lubricating oil pressure chamber being connected to valve pressure-sensitive chamber 4.
Realize that above-mentioned elastic valve combines the unit the theoretical scheme sealed firmly and is：By pressurising mouth 11 to valve closing chamber 2
Apply pressure, the displacement that measuring bellow lid 3 generates, test obtains required pressure P when it generates maximum close distance H maximumDifference,
By pressure PDifferenceIn addition the pressure P of operating pressure chamber 6 of the aircraft when requiring flying heightHigh-altitudeIt is needed to get to valve closing chamber 2
The pressure P to be filled with.Then it combines the unit in the elastic valve of 2 charged pressure P of valve closing chamber, is wanted in aircraft arrival
When the flying height asked, it can theoretically realize bellows cover 3 in the effect of valve closing chamber 2 and 6 pressure difference P difference of operating pressure chamber
Under, the maximum displacement of maximum close distance H is generated, is bonded two sealing surfaces completely, realizes the hard sealing of elastic valve combination unit.
Above-mentioned theory scheme in actual process implementation, want by the performance for being unable to satisfy valve sealing there are following special circumstances
It asks：First is that lid sealing surface 10 and the roughness precision of seat sealing surface 9 be not high, it is unfavorable for the hard sealing with device；Second is that being assembled
Error influences, and lid sealing surface 10 and seat sealing surface 9 cannot be exactly perpendicularly to 5 axis of bellows, when two sealing surfaces being caused to be bonded, circle
Circumferential direction gap is uneven and can not seal；Third is that circumferencial direction and uneven when 5 flexible deformation of bellows, i.e., when theory is displaced
When reaching maximum close distance H maximum, the circumferencial direction all the points of lid sealing surface 10 can not entirely reach maximum close distance H
Maximum causes lid sealing surface 10, seat sealing surface 9 that cannot be bonded completely, cannot achieve hard sealing.
Take precautions against and consider actual process, in conjunction with above-mentioned theory in order to thoroughly realize that it is hard close that hard sealing takes following steps to carry out
Envelope：
S1：The grinding of 3 upper cover sealing surface 10 of bellows cover：Red copper grinding sleeve bellows cover is used on horizontal high-speed grinding machine
3 upper cover sealing surfaces 10 are ground, and roughness reaches Ra0.8 or more precision；
S2：Bellows 5 corrects：Bellows 5 is corrected, keeps its axis and the nozzle at 5 both ends of bellows concentric；
S3：Bellows 5 and 3 erection welding of bellows cover：To the outer circle that bellows cover 3 and bellows 5 cooperate, according to ripple
The spout diameter size progress reconditioning one by one of pipe 5, keeps the two cooperation close and concentric, then to progress electric resistance welding at cooperation
Form combined bellows part；
S4：The combined bellows part and 8 erection welding of shell that S3 is formed：8 outer circle of shell is clamped with lathe, corrects shell 8
Inner hole guarantee it is concentric with the outer circle of clamping, to the inner hole of shell 8 and the cooperation of bellows 5 according to the nozzle outer diameter of bellows 5
Reconditioning one by one is carried out, both makes cooperation close and bellows cover 3 and concentric according to shell 8, then to progress Resistance Welding at cooperation
It connects to form housing assembly；
S5：The housing assembly and 1 erection welding of case lid that S4 is formed：In the external coated lubrication of the guide rod of case lid 1
Rouge and graphite powder carry out electron beam welding after assembling with bellows cover 3, while carrying out radiating treatment, form elastic valve after welding
Component；
S6：The elastic valve component that S5 is formed combines to form elastic valve assembly with valve base 7, the assembly of sealing ring 12；
S7：It determines soldering and sealing pressure P, carries out according to the following steps：
A) it tests and determines PDifference：It is slowly pressurizeed by 11 pairs of valve closing chambers 2 of pressurising mouth, while measuring the axis of lid sealing surface 10
Displacement of the lines, measurement method are that measurement 10 circumferencial direction of sealing surface is evenly distributed with 3 or more the displacements put respectively at the same pressure, individually
Point continues to pressurize after being bonded stop with seat sealing surface 9, until sealing circumferencial direction each point displacement progressively reaches HIt is maximum, and
When each point displacement difference is 0.03mm~0.10mm, stop pressurization, records the pressure P applied at this timeDifference, it is relative pressure；
A) soldering and sealing pressure P is calculated：Soldering and sealing pressure P is calculated as follows
P=PDifference+PHigh-altitude
Wherein：PHigh-altitudeAtmospheric pressure when for aircraft flight to predetermined altitude, is absolute pressure；
S8：The soldering and sealing of pressurising mouth 11：After vacuumizing to valve closing chamber 2, charged pressure is the helium of P, then by pressurising
Mouth 11 is blocked using argon arc welding, completes the hard sealings of elastic valve combination unit.
The present invention breaches the hard sealing technique bottleneck of the elastic valve combination unit, can be qualified by valve sealing performance
Rate is increased to 95% or more by 50% or less, thoroughly solves the hard sealing problem of the elastic valve combination unit, the present invention
Technical solution compared with the existing technology, reduce the technology controlling and process required precision of product, technique exploitativeness is strong, after assembly
Valve sealing performance, stability is strong, reliability is high.
Claims (1)
1. a kind of method realizing elastic valve combination body device and sealing firmly, the elastic valve combination body device includes case lid
(1), valve closing chamber (2), bellows cover (3), valve pressure-sensitive chamber (4), bellows (5), operating pressure chamber (6), valve base
(7), shell (8), seat sealing surface (9), lid sealing surface (10), pressurising mouth (11), sealing ring (12), bellows (5) both ends difference
With bellows cover (3) and shell (8) resistance welding；Shell (8) and case lid (1) electron beam welding；Case lid (1) and bellows
Cover the hole axle sliding connection of (3)；Valve base (7) and shell (8) pass through screw assembly connection, pass through sealing ring between the two
(12) circumferencial direction seals, and assembly the distance between back seat sealing surface (9) and lid sealing surface (10) are H, and aircraft is at ground
Maximum value HIt is maximum, when flight arrival requires height, being compressed with bellows (5), seat sealing surface (9) is bonded with lid sealing surface (10),
At this point, valve arrangement sealing need to be realized by the hard sealing of two fitting part end faces；Case lid (1), bellows cover (3), ripple
It manages and forms valve closing chamber (2) between (5) and shell (8), formed between bellows (5), bellows cover (3) and valve base (7)
Valve pressure-sensitive chamber (4), the internal cavity of valve base (7) is operating pressure chamber (6), when H is not 0, operating pressure chamber (6) and work
Door pressure-sensitive chamber (4) communicates；When aircraft flight is to predetermined altitude, seat sealing surface (9) is bonded with lid sealing surface (10) and realizes hard
Sealing, the chamber of valve pressure-sensitive at this time (4) are connected to operating pressure chamber (6) partition, guarantee that the pressure of operating pressure chamber (6) no longer drops
It is low；
It is characterized by comprising the following steps：
S1：The grinding of bellows cover (3) upper cover sealing surface (10)：Red copper grinding sleeve bellows cover is used on horizontal high-speed grinding machine
(3) upper cover sealing surface (10) is ground, and roughness reaches Ra0.8 or more precision；
S2：Bellows (5) correction：Bellows (5) is corrected, keeps its axis and the nozzle at bellows (5) both ends concentric；
S3：Bellows (5) and bellows cover (3) erection welding：To bellows cover (3) and bellows (5) cooperation outer circle, according to
The spout diameter size progress reconditioning one by one of bellows (5), keeps the two cooperation close and concentric, then to progress resistance at cooperation
Weldering welding forms combined bellows part；
S4：The combined bellows part and shell (8) erection welding that S3 is formed：Shell (8) outer circle is clamped with lathe, corrects shell
(8) inner hole guarantees concentric with the outer circle of clamping, and the inner hole cooperated to shell (8) and bellows (5) is according to the nozzles of bellows (5)
Outer diameter carries out reconditioning one by one, both make cooperation close and bellows cover (3) with it is concentric according to shell (8), then to cooperation at
It carries out electric resistance welding and forms housing assembly；
S5：The housing assembly and case lid (1) erection welding that S4 is formed：In the external coated lubrication of guide rod of case lid (1)
Electron beam welding is carried out after rouge and graphite powder, with bellows cover (3) assembly, while carrying out radiating treatment, forms yielding movable after welding
Door component；
S6：The elastic valve component that S5 is formed combines to form elastic valve assembly with valve base (7), sealing ring (12) assembly；
S7：It determines soldering and sealing pressure P, carries out according to the following steps：
A) it tests and determines PDifference：It is slowly pressurizeed by pressurising mouth (11) to valve closing chamber (2), while measuring lid sealing surface (10)
Axis shift, measurement method are that measurement sealing surface (10) circumferencial direction is evenly distributed with 3 or more the displacements put respectively at the same pressure,
Individual points continue to pressurize after being bonded stop with seat sealing surface (9), until sealing circumferencial direction each point displacement progressively reaches
HIt is maximum, and when each point displacement difference is 0.03mm~0.10mm, stop pressurization, records the pressure P that applies at this timeDifference, it is relative pressure；
B) soldering and sealing pressure P is calculated：Soldering and sealing pressure P is calculated as follows
P=PDifference+PHigh-altitude
Wherein：PHigh-altitudeAtmospheric pressure when for aircraft flight to predetermined altitude, is absolute pressure；
S8：The soldering and sealing of pressurising mouth (11)：After vacuumizing to valve closing chamber (2), charged pressure is the helium of P, then by pressurising
Mouth (11) is blocked using argon arc welding, completes the hard sealing of elastic valve combination unit.
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| CN201611140646.5A CN106641355B (en) | 2016-12-12 | 2016-12-12 | A method of realizing that elastic valve combination body device seals firmly |
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| CN201611140646.5A CN106641355B (en) | 2016-12-12 | 2016-12-12 | A method of realizing that elastic valve combination body device seals firmly |
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| CN106641355B true CN106641355B (en) | 2018-11-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278413A (en) * | 2017-12-22 | 2018-07-13 | 兰州空间技术物理研究所 | A kind of excess pressure valve suitable for the control of space capsule pressure |
| CN109027399B (en) * | 2018-09-19 | 2024-03-15 | 北京航天动力研究所 | Normally open high-pressure gas control valve |
| CN113107682A (en) * | 2021-04-27 | 2021-07-13 | 中国航发沈阳发动机研究所 | Low-resistance air pressure altitude valve for aero-engine lubricating oil system |
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| WO2005059326A1 (en) * | 2003-12-16 | 2005-06-30 | Faurecia Systemes D'echappement | Device for sealing the end of a pipe of an exhaust line |
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| CN204420295U (en) * | 2014-12-11 | 2015-06-24 | 太原航空仪表有限公司 | A kind of vacuum corrugated pipe realizes the reduction valve that delivery pressure is absolute pressure |
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| CN106091010A (en) * | 2016-06-21 | 2016-11-09 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of engine chamber duplex burner valve |
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|---|---|---|---|---|
| WO2005059326A1 (en) * | 2003-12-16 | 2005-06-30 | Faurecia Systemes D'echappement | Device for sealing the end of a pipe of an exhaust line |
| CN1951619A (en) * | 2005-10-18 | 2007-04-25 | 甘志银 | Vacuum fusion welding packaging method and packaging device |
| CN204420295U (en) * | 2014-12-11 | 2015-06-24 | 太原航空仪表有限公司 | A kind of vacuum corrugated pipe realizes the reduction valve that delivery pressure is absolute pressure |
| CN105042124A (en) * | 2015-08-12 | 2015-11-11 | 中国航空工业集团公司西安飞机设计研究所 | Check valve device at end of guiding pipe |
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