CN104110496A - Sealing structure for rotary shaft of flue gas valve - Google Patents
Sealing structure for rotary shaft of flue gas valve Download PDFInfo
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- CN104110496A CN104110496A CN201410130501.1A CN201410130501A CN104110496A CN 104110496 A CN104110496 A CN 104110496A CN 201410130501 A CN201410130501 A CN 201410130501A CN 104110496 A CN104110496 A CN 104110496A
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- gas fume
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Abstract
The invention relates to a flue gas valve, and discloses a sealing structure for a rotary shaft of a flue gas valve. The sealing structure comprises a packing pipe. A pressing ring, first buffering rings, a compression spring, a graphite sealing ring and second buffering rings which are sequentially butted to one another are arranged in the packing pipe, an inner rib is arranged at one end of the packing pipe, an outer rib is arranged at the other end of the packing pipe, an outer flange is arranged at the end, which is far away from the first buffering rings, of the pressing ring and is connected with the outer rib by assembling bolts, an adjusting gap is reserved between the outer flange and the outer rib, the second buffering rings are butted to the inner rib, the outer peripheral surface of the graphite sealing ring is hermetically connected with the inner peripheral surface of the packing pipe, the flue gas valve comprises the rotary shaft, the rotary shaft is penetratingly arranged in the graphite sealing ring and is hermetically butted to the graphite sealing ring, matching surfaces of the rotary shaft and the graphite sealing ring are conical surfaces, and small-diameter ends of the conical surfaces are close to the inner rib. The sealing structure for the rotary shaft of the flue gas valve has the advantages that a shaft end of the rotary shaft of the flue gas valve can be sealed by the sealing structure, and sealing effects can be adjusted; the problem of leakage at a shaft end of an existing flue gas valve can be solved by the aid of the sealing structure.
Description
Technical field
The present invention relates to gas fume valve, relate in particular to a kind of gas fume valve rotating shaft sealing structure, belong to fuel engine power generation technical field.
Background technique
Gas fume valve is the equipment that connects gas turbine (claiming again combustion machine) and exhaust heat boiler, the temperature of its inner flue gas is between 500 ℃～700 ℃, pressure is 5000～6500Pa, during use, by outside hydraulic jack or motor, drive, drive gas fume valve rotating shaft to rotate, thereby realize the rotation of 0～90 ° of valve plate.At Chinese application number, be 2007101646590, within open day, be July 9 in 2008 day, be called in the patent document of " gas baffle door and seal arrangement " and disclose a kind of gas fume valve and sealing configuration.Sealing problem when existing gas fume valve has all only solved and closed up between valve plate and flue, is not effectively solved for the sealing between gas fume valve rotating shaft and flue wall (claiming again shaft end seal) problem.When gas fume valve rotating shaft sealing is bad, device interior high-temperature flue gas can leak, affect the performance of equipment and cause environmental pollution.
Summary of the invention
The invention provides and a kind ofly can carry out gas fume valve rotating shaft sealing structure shaft end seal and that sealing effect is adjustable to the rotating shaft of gas fume valve, solved existing gas fume valve and can produce the problem that axle head leaks.
Above technical problem solves by following technical proposal: a kind of gas fume valve rotating shaft sealing structure, comprise loading pipe, in described loading pipe, be provided with the trim ring being connected to successively together, the first buffering ring, Compress Spring, carbon seal ring and the second buffering ring, one end of described loading pipe is provided with inner retaining side, the other end is provided with outer rib, described trim ring is provided with flanging away from one end of the first buffering ring, described flanging and described outer rib link together by assembling bolt, between flanging and outer rib, be provided with and regulate gap, described the second buffering ring is connected to together with described inner retaining side, the outer circumferential face of described carbon seal ring is sealed connected together with described loading pipe inner peripheral surface, gas fume valve comprises rotating shaft, described rotating shaft is arranged in described graphite-seal ring and sealing is connected to together, the fitting surface of described rotating shaft and graphite-seal ring is that miner diameter end is near the conical surface of described inner retaining side.During use, by outer rib and flue are linked together to realize of the present invention fixing, when causing sealing effect bad because of wearing and tearing between carbon seal ring and rotating shaft, thereby go to push away carbon seal ring by trim ring, with respect to rotating shaft, move axially from novel sealing, Compress Spring is provided by the space that provides carbon seal ring to move.
As preferably, described carbon seal ring comprise outer tube and at least twice along the graphite annulus of outer tube axial distribution, the outer circumferential face of described graphite annulus is connected to together with the inner peripheral surface sealing of described outer tube, and the outer circumferential face of described outer tube is connected to together with the inner peripheral surface sealing of described loading pipe.During single track graphite annulus, restriction due to machining accuracy, the inner peripheral surface of graphite annulus may produce the little groove of axial perforation, while making to use, the position at low groove place easily produces leakage phenomenon, adopt after at least twice graphite annulus seals, the probability that groove in twice graphite annulus circumferentially staggers along rotating shaft increases, thereby is not easy to produce the phenomenon of leaking, and therefore can cancel each other to improve sealing by random error.
As preferably, the inner peripheral surface of described buffering ring is provided with the annular gas pressure relief slot circumferentially extending along buffer memory ring.Open in the process of gas baffle door, flue gas can first pass through the inner peripheral surface of buffering ring along the kinetic energy of the mobile part of rotating shaft before arriving at carbon seal ring, kinetic energy when now gas pressure relief slot plays effect, flue gas that this strand of flue gas carried out to reduction of speed and arrives carbon seal ring diminishes, thereby can effectively reduce the destruction of the instantaneous impact of flue gas while opening the door to sealing place, sealing effect of the present invention is effectively promoted.
As preferably, between described inner retaining side and buffering ring and between trim ring and buffering ring, be all provided with baffle ring, the external diameter of baffle ring is less than the external diameter of described buffering ring, and the internal diameter of baffle ring is less than the internal diameter of buffering ring.In assembly process, when if fruit adopts the local method of knocking or pushing to make trim ring extruding inner member, trim ring can produce biasing moment to inner member, this biasing moment can cause circumferential eccentric wear in carbon seal ring, this technological scheme can play the effect of scattering to biasing moment, thereby play, reduces the eccentric wear in assembly process, carbon seal ring inner peripheral surface being produced.
As preferably, the two ends of described carbon seal ring are respectively provided with at least two described buffering rings, are provided with described baffle ring between adjacent buffering ring.Can further reduce the eccentric wear producing at carbon seal ring inner peripheral surface in assembly process and reduce the disrepair phenomenon producing when graphite is subject to axial force.
As preferably, gas fume valve also comprises door-plate, in described rotating shaft, be arranged with bonding ring, described bonding ring is between described buffering ring and carbon seal ring, described bonding ring comprises only overflow ring and aluminium ring, the described ring that only overflows is provided with annular containing groove towards the radial inner end of the end face of carbon seal ring one end, described aluminium ring is positioned at described containing groove, described aluminium ring links together described carbon seal ring and described rotating shaft sealing, and described rotating shaft is provided with corresponding to the inside at the position of described bonding ring the electric heating tube that makes described aluminium ring fusing use.Before assembling, aluminium ring is not to be bonded in carbon seal ring and rotating shaft, after the present invention assembles, by capacitance tube heat fused aluminium ring, then stops heating, after aluminium ring cooling curing, carbon seal ring and rotating shaft sealing is bonded together.In follow-up using process, make aluminium ring fusing that rotating shaft can be rotated easily before rotating shaft by electric heating tube at every turn, after rotating shaft rotate in place, stop heating aluminium ring, aluminium ring is cooling curing and realize sealing again.
As preferably, described gluing ring is between carbon seal ring and door-plate.The position between carbon seal ring and door-plate of rotating shaft is the temperature of inner temperature higher (lower 50 ° than the flue-gas temperature in chimney (500 ℃～700 ℃)), the other end close to the temperature of external environment condition (even if summer also can be over 60 °).Energy when this technological scheme can reduce melting aluminum ring, while making melting aluminum ring consuming time short, consume energy low.
As preferably, gas fume valve also comprises door-plate, described rotating shaft is provided with external rotor electric machine, described trim ring is between described door-plate and external rotor electric machine, described external rotor electric machine and described rotating shaft are coaxial, and the external rotor of described external rotor electric machine is provided with the blade that air-flow is blown towards the joint of described trim ring and rotating shaft.Can be with compact structure inner air blowing along rotating shaft surface to flue, can play the part stoping under carbon seal ring wearing and tearing is shed to flue outside, is conducive to keep environment, simultaneously when sealing place produces leakage, this air-flow can play the effect that stops flue gas to leak, and sealing effect is further promoted.
As preferably, described rotating shaft inside is provided with for driving the thermo-electric generation pipe of described external rotor electric machine, and the temperature end of described thermo-electric generation pipe is positioned at described door-plate.Realized and utilized the temperature of flue gas generate electricity and drive external rotor electric machine to realize sealing, can reduce energy consumption of the present invention.Simultaneously thermal generator also end of door plate played the effect of cooling, can reduce the speed of door-plate high temperature ageing, to improve the working life of door-plate.
As preferably, the temperature end of described thermo-electric generation pipe is platy structure, and the area of the temperature end of described thermo-electric generation pipe is the 50%-80% of described door-plate area.Can further improve the generated energy of thermal generator and the cooling-down effect of end of door plate.
The present invention has following advantage: realized using the shaft end seal of the rotating shaft of the gas fume valve in hot environment; Be provided with inner retaining side and trim ring, and together with carbon seal ring two ends are all connected to trim ring with inner retaining side by buffering ring, the maximum instantaneous impact force that in assembly process, carbon seal ring part affords is little, in assembly process, be not easy to cause the breakage of graphite annulus, requiring during to assembling is low, the convenience while having improved assembling; Carbon seal ring and rotating shaft are by cone match and Compress Spring is set, and make can again regulate after poor sealing and from novel sealing; Loading pipe is set all parts is unified to fix, convenience during installation is good.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention while not drawing rotating shaft.
Fig. 2 is the local enlarged diagram at the A place of Fig. 1.
Fig. 3 schematic diagram of the present invention.
Fig. 4 is the local enlarged diagram at the B place of Fig. 3.
In figure: loading pipe 1, inner retaining side 11, outer rib 12, attachment hole 13, regulate gap 15, trim ring 2, flanging 21, assembling bolt 22, carbon seal ring 3, outer tube 31, graphite annulus 32, the first buffering ring 41, the second buffering ring 42, gas pressure relief slot 41, baffle ring 5, bonding ring 6, electric heating tube 61, ring 62 only overflows, annular containing groove 621, aluminium ring 63, gas fume valve 7, door-plate 71, rotating shaft 72, gas baffle door drive mechanism 73, external rotor electric machine 8, blade 81, thermo-electric generation pipe 9, the temperature end 91 of thermo-electric generation pipe, Compress Spring 10, the external diameter R1 of buffering ring, the external diameter R2 of baffle ring, the internal diameter R3 of buffering ring, the internal diameter R4 of baffle ring.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated.
Referring to Fig. 1, a kind of gas fume valve rotating shaft sealing structure, comprises loading pipe 1 and trim ring 2.The right-hand member of loading pipe 1 is provided with inner retaining side 11.The left end of loading pipe 1 is provided with outer rib 12.Outer rib 12 is provided with attachment hole 13.In loading pipe 1, be provided with 3,2 the second buffering rings 42 of 2 the first buffering rings 41, Compress Spring 10, carbon seal ring that are connected to successively together.
The outer end of trim ring 2 in figure left end be provided with flanging 21.Between flanging 21 and outer rib 12, by assembling bolt 22, link together, between flanging 21 and outer rib 12, be provided with and regulate gap 15.Interior and same the first buffering ring 41 of left end that the right-hand member of trim ring 2 is located in loading pipe 1 is connected to together.
Carbon seal ring 3 comprises outer tube 31 and graphite annulus 32.The outer circumferential face of graphite annulus 32 is connected to together with the inner peripheral surface sealing of outer tube 31.Together with the inner peripheral surface sealing of the outer circumferential face of outer tube 31 and loading pipe 1 is connected to.The inner peripheral surface 321 of graphite annulus is the conical surface, and inner peripheral surface 321 right-hand members of graphite annulus are miner diameter end.
Between trim ring 2 and the first buffering ring 41, between 2 the first buffering rings 41, between 2 the second buffering rings 42 and be all provided with baffle ring 5 between the second buffering ring 42 and inner retaining side 11.
The first buffering ring 41 is identical with the structure of the second buffering ring 42.
Referring to Fig. 2, the inner peripheral surface of the second buffering ring 42 is provided with annular gas pressure relief slot 43.The external diameter R2 of baffle ring is less than the external diameter R1 of buffering ring.The internal diameter R4 of baffle ring is less than the internal diameter R3 of buffering ring.
Referring to Fig. 3, gas baffle door 7 comprises door-plate 71, rotating shaft 72 and gas baffle door drive mechanism 73.Door-plate 71 is connected to the right-hand member of rotating shaft 72.Gas baffle door drive mechanism 73 is motor.Gas baffle door drive mechanism 73 is connected to the left end of rotating shaft 72.Between rotating shaft 72 and graphite-seal ring 3, it is cone match.After wearing and tearing between carbon seal ring and rotating shaft, by tight assembling bolt 22, trim ring 2 is moved to right and the right side pushes away graphite-seal ring 3 and makes between rotating shaft 72 and graphite-seal ring from novel sealing.
Rotating shaft 72 and door-plate 71 are all hollow structure.Rotating shaft 72 is provided with external rotor electric machine 8.External rotor electric machine 8 and rotating shaft 72 are arranged in rotating shaft 72 coaxially.The external rotor of external rotor electric machine 8 is provided with blade 81.Trim ring 2 is between door-plate 71 and external rotor electric machine 8.Rotating shaft 72 inside are provided with for driving the thermo-electric generation pipe 9 of external rotor electric machine 8.The temperature end 91 of thermo-electric generation pipe is positioned at door-plate 71.The temperature end 91 of thermo-electric generation pipe is platy structure.The area of the temperature end 91 of thermo-electric generation pipe is 50% of door-plate 71 areas.In rotating shaft 72, be arranged with bonding ring 6.Gluing ring 6 is between carbon seal ring 3 and door-plate 71.Rotating shaft 72 is provided with electric heating tube 61 corresponding to the inside at the position of bonding ring.
Referring to Fig. 4, bonding ring 6 is between buffering ring 4 and carbon seal ring 3.Bonding ring 6 comprises only overflow ring 62 and aluminium ring 63.Only the radial inner end of excessive ring 62 end faces towards carbon seal ring one end is provided with annular containing groove 621.Aluminium ring 63 is positioned at containing groove 621.
During use, referring to Fig. 3 and Fig. 4, by construction bolt poling attachment hole 13, the shell of outer rib 12 and flue links together to realize of the present invention fixing.Between loading pipe 3 and flue, be what be tightly connected
When 660 ° of temperature are following, aluminium ring 63 is in solid-state.After all parts of the present invention assembles, give electric heating tube 61 power supplies, the heat that capacitance tube 61 produces passes to aluminium ring 63 and makes 63 fusings of aluminium ring through rotating shaft 72.Under the effect of the ring 62 that only overflows, the aluminium ring 63 of fusing can be from only not overflowing and overflow and flow out between ring 62 and carbon seal ring 3 between ring 62 and rotating shaft 72 and only.Then stop to electric heating tube 61 power supplies, aluminium ring 63 is lowered the temperature and is solidified, and the aluminium ring 63 after solidifying bonds together carbon seal ring 3 and rotating shaft 72 sealings.When wanting rotating shaft 72 to go to drive door-plate 71, first by electric heating tube 61 heating aluminium rings 63 to liquid state, then carry out rotating shaft; After rotation, stop electric heating tube 61 and aluminium ring 63 solidified again and carbon seal ring 3 and rotating shaft 72 sealings are bonded together.
Door-plate 72 temperature under the effect of high-temperature flue gas raises, make 9 generatings of thermo-electric generation pipe, the electric drive external rotor electric machine 8 that thermo-electric generation pipe 9 sends rotates, external rotor electric machine 8 band moving vanes 81 rotate, the wind that blade 81 produces blows towards trim ring 2, the fragment producing in carbon seal ring 3 using processs can not (i.e. left end figure) be dropped out, and if this wind sealing of playing graphite-seal ring 3 and aluminium ring 63 effect of then stoping flue gas circumferentially to leak along rotating shaft after all losing efficacy from outer end.
Embodiment two, are: the area of the temperature end of thermo-electric generation pipe is 80% of door-plate area with embodiment one difference.
Claims (10)
1. a gas fume valve rotating shaft sealing structure, it is characterized in that, comprise loading pipe, in described loading pipe, be provided with the trim ring being connected to successively together, the first buffering ring, Compress Spring, carbon seal ring and the second buffering ring, one end of described loading pipe is provided with inner retaining side, the other end is provided with outer rib, described trim ring is provided with flanging away from one end of the first buffering ring, described flanging and described outer rib link together by assembling bolt, between flanging and outer rib, be provided with and regulate gap, described the second buffering ring is connected to together with described inner retaining side, the outer circumferential face of described carbon seal ring is sealed connected together with described loading pipe inner peripheral surface, gas fume valve comprises rotating shaft, described rotating shaft is arranged in described graphite-seal ring and sealing is connected to together, the fitting surface of described rotating shaft and graphite-seal ring is that miner diameter end is near the conical surface of described inner retaining side.
2. gas fume valve rotating shaft sealing structure according to claim 1, it is characterized in that, described carbon seal ring comprise outer tube and at least twice along the graphite annulus of outer tube axial distribution, the outer circumferential face of described graphite annulus is connected to together with the inner peripheral surface sealing of described outer tube, and the outer circumferential face of described outer tube is connected to together with the inner peripheral surface sealing of described loading pipe.
3. gas fume valve rotating shaft sealing structure according to claim 1 and 2, is characterized in that, the inner peripheral surface of described buffering ring is provided with the annular gas pressure relief slot circumferentially extending along buffer memory ring.
4. gas fume valve rotating shaft sealing structure according to claim 1 and 2, it is characterized in that, between described inner retaining side and buffering ring and between trim ring and buffering ring, be all provided with baffle ring, the external diameter of baffle ring is less than the external diameter of described buffering ring, and the internal diameter of baffle ring is less than the internal diameter of buffering ring.
5. gas fume valve rotating shaft sealing structure according to claim 4, is characterized in that, the two ends of described carbon seal ring are respectively provided with at least two described buffering rings, is provided with described baffle ring between adjacent buffering ring.
6. gas fume valve rotating shaft sealing structure according to claim 1 and 2, it is characterized in that, gas fume valve also comprises door-plate, in described rotating shaft, be arranged with bonding ring, described bonding ring is between described buffering ring and carbon seal ring, described bonding ring comprises only overflow ring and aluminium ring, the described ring that only overflows is provided with annular containing groove towards the radial inner end of the end face of carbon seal ring one end, described aluminium ring is positioned at described containing groove, described aluminium ring links together described carbon seal ring and described rotating shaft sealing, described rotating shaft is provided with corresponding to the inside at the position of described bonding ring the electric heating tube that makes described aluminium ring fusing use.
7. gas fume valve rotating shaft sealing structure according to claim 6, is characterized in that, described gluing ring is between carbon seal ring and door-plate.
8. gas fume valve rotating shaft sealing structure according to claim 1 and 2, it is characterized in that, gas fume valve also comprises door-plate, described rotating shaft is provided with external rotor electric machine, described trim ring is between described door-plate and external rotor electric machine, described external rotor electric machine and described rotating shaft are coaxial, and the external rotor of described external rotor electric machine is provided with the blade that air-flow is blown towards the joint of described trim ring and rotating shaft.
9. gas fume valve rotating shaft sealing structure according to claim 8, is characterized in that, described rotating shaft inside is provided with for driving the thermo-electric generation pipe of described external rotor electric machine, and the temperature end of described thermo-electric generation pipe is positioned at described door-plate.
10. gas fume valve rotating shaft sealing structure according to claim 9, is characterized in that, the temperature end of described thermo-electric generation pipe is platy structure, and the area of the temperature end of described thermo-electric generation pipe is the 50%-80% of described door-plate area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410130501.1A CN104110496B (en) | 2014-04-02 | 2014-04-02 | Gas fume valve rotating shaft sealing structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410130501.1A CN104110496B (en) | 2014-04-02 | 2014-04-02 | Gas fume valve rotating shaft sealing structure |
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| CN104110496A true CN104110496A (en) | 2014-10-22 |
| CN104110496B CN104110496B (en) | 2017-07-07 |
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| CN201410130501.1A Active CN104110496B (en) | 2014-04-02 | 2014-04-02 | Gas fume valve rotating shaft sealing structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235210A (en) * | 2014-09-04 | 2014-12-24 | 阜新柔金密封有限公司 | Crosshead shoe sealing shaft coupler |
| CN105091373A (en) * | 2014-12-22 | 2015-11-25 | 江山显进机电科技服务有限公司 | Solar water heater |
| CN109780217A (en) * | 2019-03-28 | 2019-05-21 | 重庆华能水电设备制造有限公司 | Clearance-type oil mist prevention sealing cover with air guide structure |
| CN110397787A (en) * | 2019-06-21 | 2019-11-01 | 中国计量大学上虞高等研究院有限公司 | The pipeline throttling shock resistance poppet valve device of bidirectional rotation dynamic pressure sealing |
| CN112283353A (en) * | 2020-12-28 | 2021-01-29 | 胜利油田固邦石油装备有限责任公司 | Drilling mud pump packing seal structure |
| CN113577474A (en) * | 2021-07-20 | 2021-11-02 | 杭州医学院 | Centralized oxygen supply monitoring system for hospital |
| CN113790950A (en) * | 2021-09-17 | 2021-12-14 | 长春市镨策试验仪器有限责任公司 | Pressure-bearing device for simulating high-energy-storage rock mass excavation unloading test and sealing method |
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| CN202812440U (en) * | 2012-06-21 | 2013-03-20 | 镇江市铸造阀门厂有限公司 | Valve rod multiple sealing device for ultralow temperature and special valves |
| CN103343835A (en) * | 2013-07-29 | 2013-10-09 | 天津奥美自动化***有限公司 | Sealing structure of valve |
| CN203836198U (en) * | 2014-04-02 | 2014-09-17 | 衢州兰玲机电科技有限公司 | Sealing structure of rotating shaft of flue gas valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235210A (en) * | 2014-09-04 | 2014-12-24 | 阜新柔金密封有限公司 | Crosshead shoe sealing shaft coupler |
| CN105091373A (en) * | 2014-12-22 | 2015-11-25 | 江山显进机电科技服务有限公司 | Solar water heater |
| CN105091373B (en) * | 2014-12-22 | 2017-02-22 | 江山显进机电科技服务有限公司 | Solar water heater |
| CN109780217A (en) * | 2019-03-28 | 2019-05-21 | 重庆华能水电设备制造有限公司 | Clearance-type oil mist prevention sealing cover with air guide structure |
| CN109780217B (en) * | 2019-03-28 | 2024-01-23 | 重庆华能水电设备制造有限公司 | Gap type oil mist preventing sealing cover with air guide structure |
| CN110397787A (en) * | 2019-06-21 | 2019-11-01 | 中国计量大学上虞高等研究院有限公司 | The pipeline throttling shock resistance poppet valve device of bidirectional rotation dynamic pressure sealing |
| CN110397787B (en) * | 2019-06-21 | 2020-09-25 | 中国计量大学上虞高等研究院有限公司 | Bidirectional rotary dynamic pressure sealed pipeline throttling impact-resistant poppet valve device |
| CN112283353A (en) * | 2020-12-28 | 2021-01-29 | 胜利油田固邦石油装备有限责任公司 | Drilling mud pump packing seal structure |
| CN113577474A (en) * | 2021-07-20 | 2021-11-02 | 杭州医学院 | Centralized oxygen supply monitoring system for hospital |
| CN113577474B (en) * | 2021-07-20 | 2022-02-22 | 杭州医学院 | Centralized oxygen supply monitoring system for hospital |
| CN113790950A (en) * | 2021-09-17 | 2021-12-14 | 长春市镨策试验仪器有限责任公司 | Pressure-bearing device for simulating high-energy-storage rock mass excavation unloading test and sealing method |
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