CN205746960U - Air preheater rotor deformation automatic compensating radial sealing system - Google Patents
Air preheater rotor deformation automatic compensating radial sealing system Download PDFInfo
- Publication number
- CN205746960U CN205746960U CN201620449638.8U CN201620449638U CN205746960U CN 205746960 U CN205746960 U CN 205746960U CN 201620449638 U CN201620449638 U CN 201620449638U CN 205746960 U CN205746960 U CN 205746960U
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- China
- Prior art keywords
- rotor
- air preheater
- radial
- sealing system
- automatic compensating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
This utility model provides a kind of air preheater rotor deformation automatic compensating radial sealing system, including rotor and sealing plate, also includes: be located at the rotor radial seal mechanism between described rotor and sealing plate；Rely on temperature to produce driving force, the absolute position of described rotor radial seal mechanism can be maintained along with the change in temperature field to keep constant, the linear swollen poor type driving means in gap of leaking out with the radial direction of make-up air preheater.Rotor is hot when there is sagging deflections, there is relative displacement because of linear swollen difference in linear swollen poor type driving means, and then change the distance between diaphragm seal installing rack and rotor, maintain rotor radial seal sheet not decline with rotor deformation, make the absolute position of rotor radial seal sheet keep constant.This apparatus structure is simple, air leak rate of air curtain can be greatly lowered, it is not necessary to manual intervention, and response is fast, and low cost is easy to adjust, and maintenance cost is low, and service life is long.
Description
Technical field
This utility model relates to rotary regenerative air preheater technical field, particularly relates to a kind of swinging air preheat
Device rotor deformation automatic compensating radial sealing system.
Background technology
Air preheater, is called for short air preheater, is the necessary equipment of large-scale thermal power steam generator system, by absorbing
Flue gas heat heating enters the air of burner hearth, reaches the purpose of energy-conserving and environment-protective, imitates by improving the heat exchange of air preheater
Rate can effectively promote the generating efficiency of boiler, and improve one of important process of air preheater efficiency and reduce leakage exactly
Wind rate.Calculating reliably and show, air preheater air leakage rate often increases by 1%, and net coal consumption rate will be caused to increase
0.06-0.08g/kwh, leaking out of air preheater not only result in the increase of power plant's net coal consumption rate, also increase station-service
The consumption of electricity.While wasting the substantial amounts of energy, also cause air preheater internal appearance abrasion, fall equipment life
The disadvantage such as low.
Leaking out of rotary type heat exchanger is the intrinsic problem of this kind equipment.Leak out and generally leak out and directly leak by carrying
Wind forms.Carry the sky leaked out in cavity (accounting for rotor volumes 80%-85%) between internal rotor heat transfer element
Gas rotates with rotor and brings leaking out of flue gas into, generally carries air leak rate of air curtain at about 1.5%-2%, at present except suitably
Reduce rotating speed and reduce the unexpected economic means that there is no.Directly leak out for air driving in air-flue gas pressures difference
Under Dong, the leaking out of producing by the gap between rotor seal sheet and housing.Wherein, directly leak out generally
The major part of air preheater leakage.
When controlling preheater and directly leaking out, the most thorny issue faced is how to adapt to the upper and lower temperature difference of rotor
The rotor deformation problem caused.Preheater rotor deforms in mushroom-shaped after being heated, and axial and cold end radial seal can
By utilizing rotor deformation to do reserved setting, after hot rotor deforms, to make the axial and cold end of preheater close
Envelope gap is effectively eliminated.And radial seal gap, hot junction is difficult to simply eliminate, the most generally uses and join
Put automatic leak control system or spring flexible seals and controls hot end seal gap.Automatically leak control system one
Determine to improve in degree the situation of leaking out of air preheater, but also bring the hot bite of system, sensor degradation frequently,
Lifting arm leakage ash, malfunctioning etc. the operation maintenance problem of electric control gear, the ratio that totally puts into operation causing equipment is the highest.
And spring flexible seal structure complex, the life-span is short, and whole set replacement is costly, less economical, is leaked by minimizing
The economic well-being of workers and staff that wind is brought is difficult to make up the input of equipment.
Utility model content
The technical problems to be solved in the utility model be to provide a kind of simple in construction, can be greatly lowered air leak rate of air curtain,
Relatively low and length in service life the air preheater rotor of cost deforms automatic compensating radial sealing system.
In order to solve above-mentioned technical problem, the technical solution of the utility model is to provide a kind of air preheater rotor
Deformation automatic compensating radial sealing system, including rotor and sealing plate, it is characterised in that also include:
It is located at the rotor radial seal mechanism between described rotor and sealing plate；
Rely on temperature to produce driving force, described rotor radial seal mechanism can be maintained along with the change in temperature field
Absolute position keeps constant, the linear swollen poor type driving means in gap of leaking out with the radial direction of make-up air preheater.
Preferably, described linear swollen poor type driving means is made up of the material that the coefficient of expansion is different from described rotor.
Preferably, in different temperatures section, the swell increment of described linear swollen poor type driving means and the swell increment of rotor
Different.
Preferably, described linear swollen poor type driving means includes the material system different from described rotor by the coefficient of expansion
The driving pipe become, drives and is cased with the sleeve pipe identical with described rotor material outside pipe.
Preferably, described sleeve pipe is fixed with rotor, fixes with described rotor, described driving inside described driving pipe
Outside pipe, free wxpansion is connected with diaphragm seal installing rack outer end.
Preferably, described rotor radial seal mechanism includes that rotor radial seal sheet, rotor radial seal sheet are located at
On diaphragm seal installing rack, diaphragm seal installing rack the inner is hinged on described rotor；Described rotor radial seal sheet can
To arrange two-layer or multilamellar, the primary seal sheet hard including relative thick and the soft secondary diaphragm seal of relative thin, described time close
Mounting and described sealing plate preset clearance than described primary seal sheet and described sealing plate preset clearance little.
Preferably, described primary seal sheet lower end is inserted and is located in the steel plate groove on described rotor radial dividing plate.
Preferably, also include that the displacive transformation for described linear swollen poor type driving means being produced is described rotor
The drive mechanism of the upper and lower displacement of apex seal.
Preferably, described drive mechanism includes at least one reversing plate, outside described driving pipe free wxpansion and with
Reversing plate is slide hinged, and described diaphragm seal installing rack outer end is connected with reversing plate by sliding fulcrum.
Preferably, described rotor is hot when there is sagging deflections, and described linear swollen poor type driving means is because of the most swollen
Differ from and relative displacement occur, change the distance between described diaphragm seal installing rack and rotor by described drive mechanism,
Maintain rotor radial seal sheet not decline with rotor deformation, make the absolute position of rotor radial seal sheet keep not
Become.
Being drawn by theoretical and practice, there is approximately linear ratio in sagging deflections amount and the air preheater hot-side temperature of rotor
Relation.Meanwhile, in operating temperature range, the acting characteristic of driving means keeps and rotor material the most substantially
The ratio of the coefficient of expansion and variations in temperature quite (linear swollen difference), thus can guarantee that the distance pushed or pull on
It is directly proportional with hot-side temperature.I.e. the pushing away of the sagging deflections of rotor and driving means, draw distance all to there is line with temperature
Sex ratio relation, so by the size changing reversing plate, i.e. can ensure that diaphragm seal position is protected at various temperatures
Hold constant.
This utility model utilizes a kind of linear swollen poor type driving means so that hot end seal sheet is not heated change with rotor
Decline during shape, maintain hot end seal gap in less scope.Meanwhile, to can also be used for preheater cold for this device
End, reduces the cold end of preheater under underload and leaks out.
Compared to existing technology, this utility model has the advantages that
(1) system is simple, it is not necessary to arrange the driving of any outside, drive disk assembly, without arranging electrically
Control system, i.e. can be greatly lowered air leak rate of air curtain, and Air leakage control effect is close to the automatic Air leakage control system put into operation
System.
(2) without manual intervention, it is not necessary to regular maintenance.Structure is driven, without electric operation without traditional power
System, i.e. operates without manual intervention, for there being operation safety clearance more than certain load during work, will not grind
Damaging diaphragm seal, therefore equipment is also without often safeguarding.
(3) response is fast, directly utilizes different materials differences in expansion characteristic, and material only expands and residing temperature phase
Close, when rotor deformation, action response can be made immediately.
(4) economic benefit is obvious, and infrastructure cost is relatively low, puts into payoff period the shortest.
(5) simple in construction, is convenient to mount and dismount.Owing to diaphragm seal is incorporated into sealing on installing rack, and dress up one
Straight line, not only installs simple, only needs the internal and external section securing member of mounting or dismounting diaphragm seal installing rack during dismounting, just can be overall
Unload lower sealing piece, the easiest；Driving means is the most such.
(6) easy to adjust, when unit operation temperature has bigger change, it is only necessary to change oscillating deck size and change
Become magnification ratio, it is possible to reset compensation gap value.
(7) life-span is long.
(8) air preheater less to diameter, can directly utilize the rigidity of diaphragm seal installing rack, can be further
Simplified design structure and reduction cost.
(9) maintenance cost is low, after working long hours, it is only necessary to changing diaphragm seal, later maintenance cost is low.
Accompanying drawing explanation
The repulsive-type maglev sealing compensation system cold conditions structural representation that Fig. 1 provides for embodiment 1；
Fig. 2 is diaphragm seal structural representation in embodiment 1；
The repulsive-type maglev hot structural representation of sealing compensation system that Fig. 3 provides for embodiment 1；
The pulling type sealing compensation system cold conditions structural representation that Fig. 4 provides for embodiment 2；
The pulling type hot structural representation of sealing compensation system that Fig. 5 provides for embodiment 2.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is expanded on further.Should be understood that these embodiments are only used for
This utility model is described rather than limits scope of the present utility model.In addition, it is to be understood that reading this practicality
After the content of novel instruction, this utility model can be made various changes or modifications by those skilled in the art, this
A little equivalent form of values fall within the application appended claims limited range equally.
Embodiment 1
As it is shown in figure 1, select a kind of coefficient of expansion material more than rotor as linear swollen poor type driving means
Drive workpiece, constitute the driving means 2 of repulsive-type maglev.In order to save space, driving means 2 selects cylinder structure
Driving pipe, drive pipe outer cover one sleeve pipe identical with rotor material, do not ground by flue gas with protection driving workpiece
Damage.Sleeve pipe and rotor 1 is fixed, and drives and fixes with rotor 1 inside pipe, drive outside pipe free wxpansion and with change
Slide hinged to plate 3.What the driving means of repulsive-type maglev was selected drives the coefficient of expansion of pipe to be more than the swollen of rotor material
Swollen coefficient, rotor 1 is hot sagging deflections occurs time, drive tube swelling amount more than rotor expansion amount, thus push away
Dynamic reversing plate 3 moves.
In conjunction with Fig. 2, rotor radial seal sheet 4 is arranged on the diaphragm seal installing rack 7 with channel-section steel manufacture, seals
Sheet installing rack 7 the inner is hinged on rotor 1, and diaphragm seal installing rack 7 outer end is by sliding fulcrum and reversing plate 3
It is connected.
Rotor radial seal sheet 4 arranges two-layer, thicker primary seal sheet 8 lower end insert be contained in rotor radial every
In steel plate groove 10 on plate, being additionally provided with a piece of thin soft secondary diaphragm seal 9, secondary diaphragm seal 9 is than primary seal sheet 8
Little with the preset clearance of sealing plate 5, to avoid primary seal sheet 8 and sealing plate 5 that excessive friction occurs.
In conjunction with Fig. 3, rotor 1 is hot sagging deflections occurs time, there is phase because of linear swollen difference in driving means 2
To displacement, change the distance between diaphragm seal installing rack 7 and rotor 1 by reversing plate 3, basic maintenance rotor footpath
Do not decline with rotor deformation to diaphragm seal 4, finally make the absolute position of diaphragm seal keep being basically unchanged, thus
Play the purpose reducing gap of leaking out, reducing air leak rate of air curtain.
On relatively large air preheater, two or more reversing plate 3 can be in position installed, in case
Diaphragm seal installing rack 7 causes the most greatly, because of self deflection deformation, increase of leaking out.
Embodiment 2
As shown in Figure 4 and Figure 5, the present embodiment is with the difference of embodiment 1: linear swollen poor type driving means
Use the driving means 6 of pulling type.
Compared to the driving means 2 of repulsive-type maglev, the driving means 6 of pulling type differs primarily in that what it selected drives
The coefficient of expansion of dynamic pipe less than the coefficient of expansion of rotor material, rotor 1 is hot sagging deflections occurs time, drive
Tube swelling amount is less than rotor expansion amount, thus pulls reversing plate 3 to move.Reversing plate 3 installation direction and embodiment
1 is contrary, thus reaches operational effect similarly to Example 1.
Claims (9)
1. an air preheater rotor deformation automatic compensating radial sealing system, including rotor (1) and sealing plate
(5), it is characterised in that also include:
It is located at the rotor radial seal mechanism between described rotor (1) and sealing plate (5)；
Rely on temperature to produce driving force, described rotor radial seal mechanism can be maintained along with the change in temperature field
Absolute position keeps constant, the linear swollen poor type driving means in gap of leaking out with the radial direction of make-up air preheater.
2. a kind of air preheater rotor deformation automatic compensating radial sealing system as claimed in claim 1, it is special
Levy and be: described linear swollen poor type driving means is made up of the material that the coefficient of expansion is different from described rotor (1).
3. a kind of air preheater rotor deformation automatic compensating radial sealing system as claimed in claim 1, it is special
Levy and be: in different temperatures section, the swell increment of described linear swollen poor type driving means and the expansion of rotor (1)
Amount difference.
4. a kind of air preheater rotor deformation automatic compensating radial sealing system as claimed in claim 1 or 2,
It is characterized in that: described linear swollen poor type driving means includes by the coefficient of expansion different from described rotor (1)
The driving pipe that material is made, drives and is cased with the sleeve pipe identical with described rotor (1) material outside pipe.
5. a kind of air preheater rotor deformation automatic compensating radial sealing system as claimed in claim 4, it is special
Levy and be: described sleeve pipe is fixed with rotor (1), fix with described rotor (1) inside described driving pipe, institute
State free wxpansion outside driving pipe to be connected with diaphragm seal installing rack (7) outer end.
6. a kind of air preheater rotor deformation automatic compensating radial sealing system as claimed in claim 1, it is special
Levy and be: described rotor radial seal mechanism includes rotor radial seal sheet (4), rotor radial seal sheet (4)
Being located on diaphragm seal installing rack (7), diaphragm seal installing rack (7) the inner is hinged on described rotor (1),
Described rotor radial seal sheet (4) can arrange two-layer or multilamellar, including the primary seal sheet (8) that relative thick is hard
The secondary diaphragm seal (9) soft with relative thin, described diaphragm seal (9) and the preset clearance of described sealing plate (5)
Less with the preset clearance of described sealing plate (5) than described primary seal sheet (8).
7. a kind of air preheater rotor deformation automatic compensating radial sealing system as claimed in claim 6, it is special
Levy and be: the steel plate groove (10) being located on described rotor (1) radially dividing plate is inserted in described primary seal sheet (8) lower end
In.
8. a kind of air preheater rotor deformation automatic compensating radial sealing system as claimed in claim 5, it is special
Levy and be: also include that the displacive transformation for described linear swollen poor type driving means being produced is described rotor radial
The drive mechanism of the upper and lower displacement of diaphragm seal (4).
9. a kind of air preheater rotor deformation automatic compensating radial sealing system as claimed in claim 8, it is special
Levy and be: described drive mechanism includes at least one reversing plate (3), outside described driving pipe free wxpansion and with
Reversing plate (3) is slide hinged, and described diaphragm seal installing rack (7) outer end is by sliding fulcrum and reversing plate (3)
It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620449638.8U CN205746960U (en) | 2016-05-17 | 2016-05-17 | Air preheater rotor deformation automatic compensating radial sealing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620449638.8U CN205746960U (en) | 2016-05-17 | 2016-05-17 | Air preheater rotor deformation automatic compensating radial sealing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205746960U true CN205746960U (en) | 2016-11-30 |
Family
ID=57363772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620449638.8U Expired - Fee Related CN205746960U (en) | 2016-05-17 | 2016-05-17 | Air preheater rotor deformation automatic compensating radial sealing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205746960U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016341A (en) * | 2016-05-17 | 2016-10-12 | 上海锅炉厂有限公司 | Rotor deformation self-compensation type radial sealing system for air preheater |
| CN107166038A (en) * | 2017-07-10 | 2017-09-15 | 徐通秀 | A kind of anti-air leakage structure for rotary regenerative air preheater |
| CN108458364A (en) * | 2017-10-11 | 2018-08-28 | 上海敖征实业有限公司 | Air preheater cold-end air radial seal Board position regulating device and air preheater |
| CN110645359A (en) * | 2019-09-24 | 2020-01-03 | 航天科工哈尔滨风华有限公司电站设备分公司 | Mechanical self-correcting air preheater sealing device |
-
2016
- 2016-05-17 CN CN201620449638.8U patent/CN205746960U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016341A (en) * | 2016-05-17 | 2016-10-12 | 上海锅炉厂有限公司 | Rotor deformation self-compensation type radial sealing system for air preheater |
| CN106016341B (en) * | 2016-05-17 | 2018-03-20 | 上海锅炉厂有限公司 | A kind of air preheater rotor deforms automatic compensating radial sealing system |
| CN107166038A (en) * | 2017-07-10 | 2017-09-15 | 徐通秀 | A kind of anti-air leakage structure for rotary regenerative air preheater |
| CN108458364A (en) * | 2017-10-11 | 2018-08-28 | 上海敖征实业有限公司 | Air preheater cold-end air radial seal Board position regulating device and air preheater |
| CN108458364B (en) * | 2017-10-11 | 2024-03-01 | 上海敖征实业有限公司 | Air preheater cold end radial seal board position adjusting device and air preheater |
| CN110645359A (en) * | 2019-09-24 | 2020-01-03 | 航天科工哈尔滨风华有限公司电站设备分公司 | Mechanical self-correcting air preheater sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20180517 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |