CN205860854U - A kind of HDT thermal compensation Follow-up seal system of heat wheel - Google Patents
A kind of HDT thermal compensation Follow-up seal system of heat wheel Download PDFInfo
- Publication number
- CN205860854U CN205860854U CN201620617501.9U CN201620617501U CN205860854U CN 205860854 U CN205860854 U CN 205860854U CN 201620617501 U CN201620617501 U CN 201620617501U CN 205860854 U CN205860854 U CN 205860854U
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- China
- Prior art keywords
- flanging
- heat wheel
- riser
- thermal expansion
- thermal
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Abstract
This utility model belongs to technical field of sealing technology, is specifically related to the HDT thermal compensation Follow-up seal system of heat wheel.This system includes flanging rigid seal board component and thermal expansion pushing component；Flanging rigid seal board component includes riser, flanging and right angle gusset；The height of riser is radially outward gradually reduced along heat wheel；The upper edge of the long limit of one of them of flanging and riser flexibly connects；Its another long limit coincide with the sealing surface of the seal stator plate of heat wheel；Right angle gusset includes base plate and the side plate being mutually perpendicular to be connected, and the another side of side plate and base plate is all connected with the bottom surface of flanging；Thermal expansion pushing component promotes flanging to rotate around the upper edge of riser by right angle gusset, for the needs that when adapting to the operating of rotary type heat exchanger (air preheater etc.) rotor, between sealing member and fanning strip, gap radially occurs angle to change, solve the problem that heat wheel causes dynamic and static gaps to become the deterioration of big sealing effectiveness because of thermal deformation.
Description
Technical field
This utility model belongs to technical field of sealing technology, is specifically related to the HDT thermal compensation Follow-up seal of heat wheel
System.
Background technology
At present.On market, existing heat wheel sealing system type has following several, including adjustable sealing,
Fixed sealing (VN sealing), contact seal system and leading-type sealing system；
The defect of above-mentioned several seal form is respectively:
1, adjustable sealing: by the measurement value of feedback in gap is dynamically adjusted gap between fanning strip and diaphragm seal thus
Reach to ensure the purpose of air leak rate of air curtain.Its shortcoming is that structure is complicated, and high to service requirement, reliability is bad, and maintenance expense is costly.State
Equipment is understood impermeable by interior a lot of power plant, and operating experience is not enough, adds that maintenance is bad, and after operation a period of time, air leak rate of air curtain is general
All over higher, some even i.e. occurs leaking out higher at initial operating stage.It addition, for the seal stator plate making heat wheel
(fanning strip) can be servo-actuated, its seal stator plate (fanning strip) inevitably making heat wheel and outer cover of heat exchanger
Between create new dynamic and static gaps, define new leak source.
2, fixed sealing (VN sealing): use double sealing system under fanning strip, expand heat wheel
Seal stator plate (fanning strip) area makes flue gas resistance increase, and decreases heat exchange area to a certain extent, makes cigarette speed increase, smoke evacuation
Temperature raises, blower fan electric current increases, and causes unnecessary energy loss.Ask in view of the reliable operating in the case of abnormal cigarette temperature
Topic, uses relatively thin diaphragm seal to reduce friction durability.The decay of sealing effectiveness is very fast.
3, contact seal system has snakelike spring-piece type and spring hinge formula, and its common feature existed is to deposit fanning strip
In long term wear problem, ensure seal clearance additionally, due to its elastic force relying on metal intrinsic, but long-term hot high temperature
Run, the elastic force diminuendo of metal, the problem that the increase of the resistances such as the heated bending of hinge axis all caused seal failure.And it is empty
Pre-device diameter is the biggest, for the hot backlash compensation ability being bent to form of seal stator plate (fanning strip) of heat wheel
More it is weak, therefore on more than 600MW Thermal generation unit air preheater, uses the most merely this sealing, frequent and fanning strip
Adjustable sealing system with the use of.
4, leading-type sealing system, it is configured with exhausting system in independent gap, belongs to energy-dissipating type sealing system.At fan
Produce relative relatively lower negative pressure in shape sheet separation, will leak out into medium sucking-off send former side medium again back to, thus reach to reduce and be situated between
The purpose of matter leakage rate, although leakage rate can be effectively controlled less than 3%, but, additionally add a set of equipment, create
Unnecessary energy consumption, its energy consumption saved and the energy consumption near cancellation of consumption, and equipment increase, maintenance amount increases.
According to the feature of rotary type heat exchanger rotor expansion, rotary shaft upwards expands elongation along axis, and radially
Rotor periphery part then can have a down dip because of the difference of cold hot-side temperature, i.e. there is outside angle lapping in storehouse dividing plate upper surface
Tiltedly (angular displacement), present rotor periphery axial displacement big, and the phenomenon that center axial displacement is little.
Above except leading-type sealing system, other seal form the most all has this overturning angle of certain ability compensation to draw
The seal clearance risen, but at present with regard to actual effect can reach minimum air leak rate of air curtain case within 5% almost without.Study carefully it former
Cause, be because these existing sealing devices all exist cannot ensure under unit full load (whole variations in temperature interval) operating mode dynamic
Static seal gap is with the problem of temperature-compensating.Sealing member varies with temperature, and self-fitting holding capacity is very limited.It addition, it is universal
It is high that these Sealing Technologies of application there is also some energy consumptions, the problems such as the life-span is short, and maintenance is big.
Utility model content
In order to solve the problem in background technology, this utility model provides one can solve heat wheel because of heat
Deformation causes dynamic and static gaps to become the HDT type thermal compensation Follow-up seal system that big sealing effectiveness deteriorates.
Concrete technical scheme of the present utility model is:
This utility model provides the HDT thermal compensation Follow-up seal system of a kind of heat wheel, firm including flanging
Property sealing plate assembly and thermal expansion pushing component；
Flanging rigid seal board component includes riser, flanging and right angle gusset；(need explanation also has this utility model
Riser and flanging can be integrated, use crimping molding, it would however also be possible to employ the modes such as welding connect)
The height of described riser is radially outward gradually reduced along heat wheel；
One of them long limit of described flanging and the upper edge of riser flexibly connect；Its another long limit with swinging heat
The sealing surface of the seal stator plate of exchanger coincide；
Described right angle gusset includes base plate and the side plate being mutually perpendicular to be connected, the another side of described side plate and base plate all with folding
The bottom surface on limit is connected；
Described thermal expansion pushing component promotes flanging to rotate around the upper edge of riser in order to fit by right angle gusset
When answering rotary type heat exchanger (air preheater etc.) rotor to operate, between sealing member and fanning strip radially there is angle in gap
The needs of degree change.
Thermal expansion pushing component includes thermal expansion pusher and fixture；Fixture includes stringer board, top board and with vertical
The transverse slat that plate is vertically connected；Stringer board superposes, with bolt by three ply board with above-mentioned riser and heat wheel radially storehouse dividing plate
Fixing connection；Transverse slat is rectangular with stringer board；Top board is connected with the base plate of described right angle gusset；Heat is installed swollen between transverse slat and top board
Swollen pusher.
The utility model proposes the version of the thermal expansion pusher of two kinds, specific as follows:
Above-mentioned thermal expansion pusher is made up of the extrusome being arranged between top board and transverse slat and connector.The side installed
Formula can be divided into two kinds of installation forms according to the structure needs of rotary type heat exchanger, the most vertically-mounted and be horizontally mounted)；
When being horizontally mounted, thermal expansion pusher is made up of extrusome, spherical joint and two group of two linkage, two group two
The pin joint of linkage is hinged with extrusome two end ring respectively, and the free end of described two group of two linkage passes through spherical joint
Respectively with top board and described lagging hinge；
Time vertically-mounted, extrusome structure is basically unchanged, and outer connector relative level is installed and lacked two group two of two ends even
Linkage, directly carries out hinged with top board and transverse slat；
Position and the quantity of thermal expansion pusher arranged by described per pass black box, can be long according to the size of black box
Short size and sealing member mounting condition select, and can arrange one, it is also possible to arrange multiple.
Specifically: above-mentioned extrusome includes shell, medium inner bag and guides plug；Guide plug and be positioned at the two ends of shell,
Medium inner bag is arranged on enclosure；Enclosure is stretched in the one end guiding plug, and the other end is exposed at housing exterior, guides beyond the Great Wall
The part being exposed at housing exterior is provided with hinge eyes, and hinge eyes is connected with the pin joint of described two group of two linkage.
Be filled with thermal media in above-mentioned medium inner bag, described thermal media by thermal strain power condition be divided into solid, liquid,
Gas or gas-liquid two-phase thing.
The utility model has the advantage of:
1, HDT type sealing system of the present utility model uses that to follow the flanging rigidity that temperature occurs negative displacement to change together close
Blanking plate component and the combination of thermal expansion pusher ensure that the relative gap sealed does not changes along with temperature, thus ensure to be somebody's turn to do
Stablizing of system sealing gap performance.
2, thermal expansion pusher can promote executor as temperature-sensitive, it is possible to achieve with variation of ambient temperature flexible with
Dynamic function, overcome current adjustable sealing system by sensor-based system and YE fanning strip is adjusted insecure
Problem.This system structure is simple, and easy to maintenance, security reliability is high.Even if air preheater generation overtemperature, the abnormal expansion such as catch fire
Phenomenon, also slew gear will be caused stuck because of overheated and toning.
3, the flanging rigid seal board component of hem dimensions gradual change, overcomes current existing many black box cold and hot
And the gap between seal stator part (such as fanning strip) not exclusively coincide problem, according to the spy of rotary type heat exchanger rotor expansion
Point, rotary shaft upwards expands elongation along axis, and rotor periphery part radially then can be because of the difference of cold hot-side temperature
Different and have a down dip, i.e. there is outside overturning angle (angular displacement) in storehouse dividing plate upper surface, presents rotor periphery axial displacement
Greatly, and the phenomenon that center axial displacement is little, therefore use hem dimensions gradual change type rigid seal plate well to compensate and turn
The angular displacement gap produced between sub-end face and fanning strip, so that it is guaranteed that sealing effectiveness.
4, application this utility model, by overcoming the defect of prior art, the full working scope slip of rotary type heat exchanger is little
In 3%, it is achieved energy-saving and cost-reducing breakthrough.It addition, this sealing system simple in construction, easy for installation, because using noncontact
Formula seals, and wear extent is less, extends service life.
Accompanying drawing explanation
Fig. 1 is the structure diagram of flanging rigid seal plate；
Fig. 2 is the structure chart of extrusome；
Fig. 3 is the vertically-mounted structural representation of this utility model；
Fig. 4 is this utility model Horizontal mounting arrangements schematic diagram；
Fig. 5 is the structural representation after this utility model is installed.
Detailed description of the invention
This utility model provides a kind of along with variations in temperature is for compensating the fanning strip radial direction side of heat wheel
The sealing device of the heat wheel of the sealing effectiveness difference caused that changes to seal clearance.
This sealing device includes flanging rigid seal plate flanging rigid seal board component 1 and thermal expansion pushing component 2；
As shown in Figure 1 and Figure 5: flanging rigid seal board component 1 includes riser 3, flanging 4 and is fixedly mounted on riser 3
And the right angle gusset 11 between flanging 4；Riser 3 and flanging 4 one crimping molding；The upper edge of flanging 4 and swinging heat exchange
The lower surface of the seal stator plate (fanning strip) 5 of device coincide；Riser 3, flanging 4 and right angle gusset 11 are handed over each along swinging heat
Parallel operation radial direction carries out gradual change；Really: flanging rigid seal plate along the outside flanging of radial direction of heat wheel,
The length of side is gradually increased.
Flanging rigid seal assembly includes riser 3, flanging 4 and right angle gusset 11；
The height of riser 3 is radially outward gradually reduced along heat wheel；
One of them long limit of flanging 4 and the upper edge of riser 3 flexibly connect；Its another long limit and swinging heat exchange
The sealing surface of the seal stator plate (fanning strip) 5 of device coincide；
Right angle gusset 11 includes base plate 18 and the side plate 19 being mutually perpendicular to be connected, the another side of base plate 18 and side plate 19 all with
The bottom surface of flanging 4 is connected；
Thermal expansion pushing component 2 promote flanging 4 to rotate around the upper edge of riser 3 by right angle gusset 11 in order to
When adapting to the operating of rotary type heat exchanger (air preheater etc.) rotor, between sealing member and fanning strip, gap radially occurs
The needs of angle change.
As shown in Figure 5: thermal expansion pushing component 2 includes thermal expansion pusher 6 and fixture 7；Fixture 7 includes stringer board
8, top board 17 and the transverse slat 9 that be connected fixing with stringer board 8；Stringer board 8 and above-mentioned riser 3 and heat wheel radially storehouse dividing plate
10 superpositions, connect fixing for three ply board with bolt；Transverse slat 9 is rectangular with stringer board 8；(transverse slat and stringer board can use the form of welding
Or the form of one crimping is manufactured)；Top board 17 is connected with the bottom surface of described right angle gusset 11；Install between transverse slat 9 and top board
Thermal expansion pusher 6.
As shown in Figure 2: the extrusome 12 expanding against device includes that shell 15, medium inner bag 20 and two guide plug 16；
Two guide plug 16 and lay respectively at the two ends of shell 15, and it is internal that medium inner bag 20 is arranged on shell 15；Two guide plug 16 one
It is internal that end all stretches into shell 15, and it is outside that the other end is all exposed at shell 15, and two guide plug 16 and are exposed at the portion outside shell 15
Dividing and be mounted on hinge eyes 21, hinge eyes 21 is connected with the pin joint of described two group of two linkage 14.
Being filled with thermal media in medium inner bag, described thermal media is divided into solid, liquid, gas by thermal strain power condition
Or gas-liquid two-phase thing；If thermal media uses gas-liquid two-phase thing, condition is used to carry out selecting gas-liquid mixed ratio according to thermal strain.
When thermal media uses fluid, for preventing leakage, in extrusome, it is provided with the medium inner bag that can carry out expanded by heating.Thermal expansion
Device has repeatedly flexible function with ambient temperature change, provides certain thermal driving force with this.
This utility model provide thermal expansion pusher variation with temperature and change, formed expand actuator, this machine
Structure make use of the heat in heat wheel, makes the medium in thermal expansion pusher expand effect, thus produces and push away
Power, makes both ends of the surface produce specific elongation, thus is applied to occur on top board and transverse slat the change of relative distance, and top board is along folding
Linea angulata generation angular displacement, it is ensured that top board matches with the fanning strip of rotary type heat exchanger all the time or keeps constant identical gap.
This utility model can be according to the multi-form of revolution heat exchanger and sealing position, and thermal expansion pusher has two kinds not
Same installation form, i.e. vertically (vertical) is installed and level (horizontal) installation:
Vertically-mounted form (as shown in Figure 3):
Thermal expansion pusher 6 is one or more extrusomes 12 being vertically installed between top board 17 and transverse slat 9.In temperature
Change time, extrusome both ends of the surface stretch out, and the flanging of gradual change type flanging rigid seal plate thus can be driven along knuckle
Line generation angular displacement, such that it is able to effectively offset air preheater rotor hot deformation, thus ensures the constant of seal clearance
Constant.
It is horizontally mounted form (as shown in Figure 4):
Thermal expansion pusher includes extrusome 12, spherical joint 13 and two group of two linkage 14；This form also can be pressed
Install one or more on same black box according to needs, so that it is guaranteed that have certain motive force and sealing function.
The pin joint of two group of two linkage 14 is hinged with 12 liang of end ring of extrusome respectively, two group of two linkage 14 from
Hinged with top board 17 and described transverse slat 9 respectively by spherical joint 13 by end.Variations in temperature time, extrusome both ends of the surface are outside
Extend, so by the flanging of two group of two connecting rod upwardly gradual change type flanging rigid seal plate along chine generation angular displacement,
Such that it is able to effectively offset air preheater rotor hot deformation, thus ensure the invariable of seal clearance.
Claims (7)
1. the HDT thermal compensation Follow-up seal system of a heat wheel, it is characterised in that: include flanging rigid seal plate
Assembly and thermal expansion pushing component；
Flanging rigid seal board component includes riser, flanging and right angle gusset；
The height of described riser is radially outward gradually reduced along heat wheel；
One of them long limit of described flanging and the upper edge of riser flexibly connect；Its another long limit and heat wheel
Seal stator plate sealing surface coincide；
Described right angle gusset includes base plate and the side plate being mutually perpendicular to be connected, the another side of described side plate and base plate all with flanging
Bottom surface is connected；
Described thermal expansion pushing component promotes flanging to rotate around the upper edge of riser by right angle gusset.
The HDT thermal compensation Follow-up seal system of heat wheel the most according to claim 1, it is characterised in that:
Thermal expansion pushing component includes at least one thermal expansion pusher and fixture；Fixture include stringer board, top board and
The transverse slat that be connected vertical with stringer board；Stringer board superposes, with bolt by three with above-mentioned riser and heat wheel radially storehouse dividing plate
Laminate is fixing to be connected；Transverse slat is rectangular with stringer board；Top board is connected with the base plate of described right angle gusset；Install between transverse slat and top board
Thermal expansion pusher.
The HDT thermal compensation Follow-up seal system of heat wheel the most according to claim 2, it is characterised in that: institute
Stating thermal expansion pusher is one or more extrusomes being vertically installed between top board and transverse slat.
The HDT thermal compensation Follow-up seal system of heat wheel the most according to claim 2, it is characterised in that: institute
State thermal expansion pusher and include extrusome, spherical joint and two group of two linkage；
The pin joint of described two group of two linkage is hinged with extrusome two end ring respectively, the freedom of described two group of two linkage
Hold by spherical joint respectively with top board and described lagging hinge.
The HDT thermal compensation Follow-up seal system of heat wheel the most according to claim 4, it is characterised in that:
Described extrusome includes that shell, medium inner bag and two guide plug；Two guide plug and lay respectively at the two ends of shell, are situated between
Matter inner bag is arranged on enclosure；Enclosure is all stretched in two one end guiding plug, and the other end is all exposed at housing exterior, and two
Individual guiding is exposed at the part of housing exterior beyond the Great Wall and is mounted on hinge eyes, the pin joint of hinge eyes and described two group of two linkage
Connect.
The HDT thermal compensation Follow-up seal system of heat wheel the most according to claim 5, it is characterised in that: institute
Being filled with thermal media in giving an account of matter inner bag, described thermal media is divided into solid, liquid, gas or gas-liquid by thermal strain power condition
Two-phase thing.
The HDT thermal compensation Follow-up seal system of heat wheel the most according to claim 6, it is characterised in that: institute
State riser and flanging one crimping molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620617501.9U CN205860854U (en) | 2016-06-21 | 2016-06-21 | A kind of HDT thermal compensation Follow-up seal system of heat wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620617501.9U CN205860854U (en) | 2016-06-21 | 2016-06-21 | A kind of HDT thermal compensation Follow-up seal system of heat wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205860854U true CN205860854U (en) | 2017-01-04 |
Family
ID=57636898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620617501.9U Withdrawn - After Issue CN205860854U (en) | 2016-06-21 | 2016-06-21 | A kind of HDT thermal compensation Follow-up seal system of heat wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205860854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937862A (en) * | 2016-06-21 | 2016-09-14 | 陕西益杰机电科技有限公司 | HDT thermal compensation follow sealing system for rotary heat exchanger |
-
2016
- 2016-06-21 CN CN201620617501.9U patent/CN205860854U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937862A (en) * | 2016-06-21 | 2016-09-14 | 陕西益杰机电科技有限公司 | HDT thermal compensation follow sealing system for rotary heat exchanger |
| CN105937862B (en) * | 2016-06-21 | 2018-04-10 | 陕西益杰机电科技有限公司 | A kind of HDT thermal compensation Follow-up seal systems of heat wheel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170104 Effective date of abandoning: 20180410 |
|
| AV01 | Patent right actively abandoned |