CN203098863U - Contact-type flexible sealing assembly and rotary air preheater sealing device - Google Patents
Contact-type flexible sealing assembly and rotary air preheater sealing device Download PDFInfo
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- CN203098863U CN203098863U CN2012207388391U CN201220738839U CN203098863U CN 203098863 U CN203098863 U CN 203098863U CN 2012207388391 U CN2012207388391 U CN 2012207388391U CN 201220738839 U CN201220738839 U CN 201220738839U CN 203098863 U CN203098863 U CN 203098863U
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- diaphragm seal
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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
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Abstract
The utility model provides a contact-type flexible sealing assembly and a rotary air preheater sealing device. The contact-type flexible sealing assembly and the rotary air preheater sealing device are used for resolving the problems that as an existing sealing device of an air preheater has structural defects, sealing effects are not good, and air leaks into smoke. The contact-type flexible sealing assembly comprises a first-layer sealing piece, a second-layer sealing piece and a third-layer sealing piece; and after the first end of the first-layer sealing piece, the first end of the second-layer sealing piece and the first end of the third-layer sealing piece are connected together, the second end of the second-layer sealing piece is higher than the second end of the first-layer sealing piece by a first preset distance, and the second end of the third-layer sealing piece is higher than the second end of the second-layer sealing piece by a second preset distance. The contact-type flexible sealing assembly is good in elasticity, allows a rotor of the air preheater to have definite irregular deformation, is good in sealing effect, has low resistance to sector plates, has few influences on drive current of a driving motor, can save energy and reduce consumption, and lowers power generation cost.
Description
Technical field
The utility model relates to the supplementary equipment of boiler of power plant, prevent the seal arrangement technical field of air on concrete is a kind of air preheater that is used for big-and-middle-sized heat power plant boiler, be meant a kind of contact-type flexible sealing assembly especially and comprise the rotary regenerative air preheater seal arrangement of this contact-type flexible sealing assembly to smoke spillage.
Background technique
Air preheater is the afterbody heat transmission equipment that extensively adopts on the big-and-middle-sized boiler of power plant, and its main effect is: one, reclaim flue gas heat, reduce exhaust gas temperature, improve efficiency of boiler, fuel saving; Two, heating boiler air temperature improves combustion efficiency; Three, chamber flue gas temperature is risen, strengthen radiation heat transfer.Existing air preheater mainly contains rotary type and tubular type.Rotary regenerative air heater is compared with tubular type, have compact structure, steel consumption less, advantage such as easy arrangement, but also have the problem of higher of leaking out.In order to reduce air leak rate of air curtain, existing rotary regenerative air heater adopts mechanical sealing system mostly, is provided with radially, axially and the bypass seal device.Except above-mentioned three kinds of seal arrangements, also have mechanical seals such as central tube sealing, hot junction sector static seal, cold junction sector static seal and axial plate static seal.They mostly are that cool and heat ends at the dividing plate of the rotor of air preheater is provided with diaphragm seal and seals.But, because radially the diaphragm seal structure on the dividing plate is perfect inadequately to be fixed on air preheater rotor, it is single sheet structure, after being heated, rotor produces irregular mushroom deformation, particularly along with the prolongation of working time and the wearing and tearing of diaphragm seal, the gap can be increasing, still can cause bigger inleakage; Even increase the quantity of dividing plate, make hot junction sector, cold junction sector and axial plate have multiple-sealed up and down, improve sealing effect, but the sealing sheet belongs to the relatively poor straight plate diaphragm seal of elasticity, the deformation that the rotor rotation brings be can not adapt to, the effect of sealing and the performance of air preheater directly had influence on.
This shows that the seal arrangement of existing air preheater makes sealing effect bad owing to there is structural defective, air leaks out to flue gas.
The model utility content
The utility model proposes a kind of contact-type flexible sealing assembly and rotary regenerative air preheater seal arrangement, owing to there is structural defective, make sealing effect bad, the problem that air leaks out to flue gas in order to the seal arrangement that solves existing air preheater.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of contact-type flexible sealing assembly comprises:
The first layer diaphragm seal that sets gradually, second layer diaphragm seal and the three-layer sealed;
After first end of first layer diaphragm seal, first end of second layer diaphragm seal and the three-layer sealed first end links together, second end of second layer diaphragm seal exceeds first predeterminable range than second end of first layer diaphragm seal, and the three-layer sealed second end exceeds second predeterminable range than second end of second layer diaphragm seal.
Wherein, preferably, the span of first predeterminable range is 1 millimeter to 2 millimeters;
The span of second predeterminable range is 2 millimeters to 3 millimeters.
Wherein, preferably, first layer diaphragm seal, second layer diaphragm seal and the three-layer sealed are specially alloy-steel plate system first layer diaphragm seal, second layer diaphragm seal and the three-layer sealed.
Wherein, preferably, comprising:
Be arranged on the hot junction sector on center, the upper end truss of air preheater;
Be symmetricly set on cold junction sector on center, the lower end truss of air preheater with sector position, hot junction;
Be arranged on the axial plate of the shell circumferential inner surface of air preheater.
Wherein, preferably, also comprise:
Be arranged on the first contact-type flexible sealing assembly of close hot junction sector one end on the radial rotor dividing plate of air preheater;
Be arranged on the second contact-type flexible sealing assembly of close cold junction sector one end on the radial rotor dividing plate of air preheater;
Be arranged on the radial rotor dividing plate of air preheater near axial the 3rd contact-type flexible sealing assembly of plate one end;
Wherein, the first contact-type flexible sealing assembly, the second contact-type flexible sealing assembly and the contact-type flexible sealing assembly of the 3rd contact-type flexible sealing assembly for providing as the utility model.
The utility model proposes a kind of contact-type flexible sealing assembly and rotary regenerative air preheater seal arrangement, comprising: the first layer diaphragm seal that sets gradually, second layer diaphragm seal and the three-layer sealed; After first end of first layer diaphragm seal, first end of second layer diaphragm seal and the three-layer sealed first end links together, second end of second layer diaphragm seal exceeds first predeterminable range than second end of first layer diaphragm seal, and the three-layer sealed second end exceeds second predeterminable range than second end of second layer diaphragm seal.Above-mentioned contact-type flexible sealing assembly, good springiness allows the rotor of air preheater that certain irregular deformation is arranged under hot operation, and good sealing effect is low to the resistance of sector, and is very little to the influence of drive motor driving current, the energy-saving and cost-reducing cost of electricity-generating that reduces.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the contact-type flexible sealing assembly that Fig. 1 provides for the utility model embodiment;
The contact-type flexible sealing assembly that Fig. 2 provides for the utility model embodiment is installed on the air preheater rotor dividing plate and contacts the work schematic representation through sealing area with the sealing of cold junction sector;
Schematic representation on the air preheater that the contact-type flexible sealing assembly that Fig. 3 provides for the utility model embodiment is installed.
Reference character: 1, first layer diaphragm seal; 2, second layer diaphragm seal; 3, the three-layer sealed; 4, dividing plate; 5, bolt; 6, cold junction sector; 7, hot junction sector; 8, axial plate.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
As Fig. 1, Fig. 2 and shown in Figure 3, the utility model embodiment provides a kind of contact-type flexible sealing assembly, comprising:
The first layer diaphragm seal 1 that sets gradually, second layer diaphragm seal 2 and the three-layer sealed 3;
After first end of first layer diaphragm seal 1, first end of second layer diaphragm seal 2 and the three-layer sealed 3 first end links together, second end of second layer diaphragm seal 2 exceeds first predeterminable range than second end of first layer diaphragm seal 1, and the three-layer sealed 3 second end exceeds second predeterminable range than second end of second layer diaphragm seal 2.
The contact-type flexible sealing assembly that the utility model embodiment provides, first end of first layer diaphragm seal 1, first end of second layer diaphragm seal 2 are that bolt 5 is connected with the mode that the three-layer sealed 3 first end links together, and can certainly be other Placements.When being installed on the rotor radial dividing plate 4 of air preheater: choose the contact-type flexible sealing assembly that the utility model embodiment provides, the first layer diaphragm seal 1 of this assembly, second layer diaphragm seal 2 and the three-layer sealed 3 first end that links together are fixed on close cold junction sector 6 one ends on the air preheater rotor dividing plate 4, and second end that does not highly wait is towards the direction of cold junction sector 6; Choose the contact-type flexible sealing assembly that the utility model embodiment provides again, the first layer diaphragm seal 1 of this assembly, second layer diaphragm seal 2 and the three-layer sealed 3 first end that links together are fixed on an end of the close hot junction sector 7 on the air preheater rotor dividing plate 4, and second end that does not highly wait is towards hot junction sector 7; Choose at last the contact-type flexible sealing assembly that the utility model embodiment provides again, the first layer diaphragm seal 1 of this assembly, second layer diaphragm seal 2 and the three-layer sealed 3 first end that links together be fixed on the air preheater rotor dividing plate 4 near an axial end of plate 8, second end that does not highly wait is towards axial plate 8.
On the edge of air preheater rotor dividing plate 4 radially, all be provided with this contact-type flexible sealing assembly like this near hot junction sector 7, close cold junction sector 6 and axial plate 8.As shown in Figure 2, when a plurality of rotor dividing plates 4 rotate to the sector sealing area, first layer diaphragm seal 1 touches cold junction sector 6 earlier, second layer diaphragm seal 2 touches cold junction sector 6 more then, because second layer diaphragm seal 2 exceeds first predeterminable range than first layer diaphragm seal 1, deformation takes place in second layer diaphragm seal 2, and last the three-layer sealed 3 touches cold junction sector 6, exceed second predeterminable range owing to the three-layer sealed 3 than second layer diaphragm seal 2, the three-layer sealed 3 deformation takes place; Keep first layer diaphragm seal 1, second layer diaphragm seal 2 to contact with cold junction sector 6, form tight gapless sealing system with the three-layer sealed 3.After this contact-type flexible sealing assembly leaves sector, be with flexible first layer diaphragm seal 1, second layer diaphragm seal 2 and the three-layer sealed 3 to upspring automatically, circulate with this and carry out good sealing effect.
During installation, assurance is fixed on close hot junction sector 7 on the air preheater rotor dividing plate 4 radially, near cold junction sector 6 with near the three-layer sealed 3 the highest side that all is arranged near air preheater rotor dividing plate 4 of the contact-type flexible sealing assembly on the edge of axial plate 8, such purpose is when air preheater rotor clockwise or when being rotated counterclockwise, guarantee that first layer diaphragm seal 1 at first touches, second layer diaphragm seal 2 touches again, last the three-layer sealed 3 touch cold junction sector 6, hot junction sector 7, axial plate 8.
When just the air preheater rotor that drawn of signal forwards the sector sealing area among Fig. 2, the working state schematic representation that the contact-type flexible sealing assembly that the utility model provides contacts with cold junction sector 6; When air preheater rotor forwarded the sector sealing area to, contact-type flexible sealing assembly did not draw with the internal surface of hot junction sector 7, the working state schematic representation omission that contact-type flexible sealing assembly contacts with the internal surface of axial plate 8.
With diaphragm seal in the prior art is that the relatively poor straight plate diaphragm seal of elasticity is compared, the utility model embodiment provides contact-type flexible sealing assembly can adapt to the deformation that the air preheater rotor rotation brings, form tight gapless sealing system, good sealing effect, energy-conserving and environment-protective.
Wherein, preferably, the span of first predeterminable range is 1 millimeter to 2 millimeters;
The span of second predeterminable range is 2 millimeters to 3 millimeters.
Such predeterminable range setting is neither too short, can adapt to deformation, guarantee sealing effect, safety durable, and is long only, can save raw material.Certainly, also can be other predeterminable range setting, when needing only assurance work, can adapt to deformation, guarantee that good sealing effect gets final product.
Wherein, preferably, first layer diaphragm seal 1, second layer diaphragm seal 2 and the three-layer sealed 3 are specially alloy steel first layer diaphragm seal, second layer diaphragm seal and the three-layer sealed.Alloyed steel has high strength, high elasticity, characteristic such as wear-resisting, high temperature resistant.Can certainly be that other elasticity better can adapt to material system first layer diaphragm seal deformation, good sealing effect, second layer diaphragm seal and the three-layer sealed.
The contact-type flexible sealing assembly that the utility model provides plays outside the good sealing effect except being applied in the air preheater sealing, can also be applied to the industry that other is used for sealing.
Wherein, preferably, as shown in Figure 3, the utility model provides a kind of rotary regenerative air preheater seal arrangement, comprising:
Be arranged on the hot junction sector 7 on center, the upper end truss of air preheater;
Be symmetricly set on cold junction sector 6 on center, the lower end truss of air preheater with hot junction sector 7 positions;
Be arranged on the axial plate 8 of the shell circumferential inner surface of air preheater.
Wherein, preferably, the rotary regenerative air preheater seal arrangement that the utility model provides also comprises:
Be arranged on the first contact-type flexible sealing assembly of close hot junction sector 7 one ends on the radial rotor dividing plate 4 of air preheater;
Be arranged on the second contact-type flexible sealing assembly of close cold junction sector 6 one ends on the radial rotor dividing plate 4 of air preheater;
Be arranged on the radial rotor dividing plate 4 of air preheater near axial the 3rd contact-type flexible sealing assembly of plate 8 one ends;
Wherein, the first contact-type flexible sealing assembly, the second contact-type flexible sealing assembly and the 3rd contact-type
The contact-type flexible sealing assembly of the contact-type flexible sealing assembly that provides as the utility model is provided the flexible sealing assembly.
Because the first contact-type flexible sealing assembly, the second contact-type flexible sealing assembly are less with the relative air preheater of the 3rd contact-type flexible sealing assembly, omit among Fig. 3 and do not draw.
When the first contact-type flexible sealing assembly, the second contact-type flexible sealing assembly and the 3rd contact-type flexible sealing assembly were installed on the rotor radial dividing plate 4 of air preheater: the first layer diaphragm seal 1 of the first contact-type flexible sealing assembly, second layer diaphragm seal 2 and the three-layer sealed 3 first end that links together were fixed on an end of the close hot junction sector 7 on the air preheater rotor dividing plate 4, and second end that does not highly wait is towards hot junction sector 7; The first layer diaphragm seal 1 of the second contact-type flexible sealing assembly, second layer diaphragm seal 2 and the three-layer sealed 3 first end that links together are fixed on close cold junction sector 6 one ends on the air preheater rotor dividing plate 4, and second end that does not highly wait is towards the direction of cold junction sector 6; The first layer diaphragm seal 1 of the 3rd contact-type flexible sealing assembly, second layer diaphragm seal 2 and the three-layer sealed 3 first end that links together be fixed on the air preheater rotor dividing plate 4 near an axial end of plate 8, second end that does not highly wait is towards axial plate 8.
As shown in Figure 2, with when a plurality of rotor dividing plates 4 rotate to the sector sealing area, the working state that the second contact-type flexible sealing assembly contacts with cold junction sector 6 is an example, first layer diaphragm seal 1 touches cold junction sector 6 earlier, second layer diaphragm seal 2 touches cold junction sector 6 more then, because second layer diaphragm seal 2 exceeds first predeterminable range than first layer diaphragm seal 1, deformation takes place in second layer diaphragm seal 2, last the three-layer sealed 3 touches cold junction sector 6, exceed second predeterminable range owing to the three-layer sealed 3 than second layer diaphragm seal 2, the three-layer sealed 3 deformation takes place; Keep first layer diaphragm seal 1, second layer diaphragm seal 2 to contact with cold junction sector 6, form tight gapless sealing system with the three-layer sealed 3.After this contact-type flexible sealing assembly leaves sector, be with flexible first layer diaphragm seal 1, second layer diaphragm seal 2 and the three-layer sealed 3 to upspring automatically, circulate with this and carry out good sealing effect.
During installation, assurance is fixed on the three-layer sealed 3 the highest side that all is arranged near air preheater rotor dividing plate 4 of the first contact-type flexible sealing assembly, the second contact-type flexible sealing assembly and the 3rd contact-type flexible sealing assembly on the air preheater rotor dividing plate 4 radially, such purpose is when air preheater rotor clockwise or when being rotated counterclockwise, guarantee that first layer diaphragm seal 1 at first touches, second layer diaphragm seal 2 touches again, last the three-layer sealed 3 touch cold junction sector 6, hot junction sector 7, axial plate 8.
When just the air preheater rotor that drawn of signal forwards the sector sealing area among Fig. 2, the working state schematic representation that the first layer diaphragm seal 1 of the second contact-type flexible sealing assembly, second layer diaphragm seal 2 and the three-layer sealed 3 end that does not highly wait contact with cold junction sector 6; When air preheater rotor forwarded the sector sealing area to, the first contact-type flexible sealing assembly did not draw with the internal surface of hot junction sector 7, the working state schematic representation omission that the 3rd contact-type flexible sealing assembly contacts with the internal surface of axial plate 8.
With diaphragm seal in the prior art is that the relatively poor straight plate diaphragm seal of elasticity is compared, the utility model embodiment provides contact-type flexible sealing assembly can adapt to the deformation that the air preheater rotor rotation brings, hot junction sector 7, cold junction sector 6 and axial plate 8 provide contact-type flexible sealing assembly to be used with the utility model embodiment, form tight gapless sealing system, good sealing effect, energy-conserving and environment-protective.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. a contact-type flexible sealing assembly is characterized in that, comprising:
The first layer diaphragm seal that sets gradually, second layer diaphragm seal and the three-layer sealed;
After first end of described first layer diaphragm seal, first end of second layer diaphragm seal and the three-layer sealed first end links together, second end of described second layer diaphragm seal exceeds first predeterminable range than second end of described first layer diaphragm seal, and the second described the three-layer sealed end exceeds second predeterminable range than second end of described second layer diaphragm seal.
2. contact-type flexible sealing assembly as claimed in claim 1 is characterized in that,
The span of described first predeterminable range is 1 millimeter to 2 millimeters;
The span of described second predeterminable range is 2 millimeters to 3 millimeters.
3. contact-type flexible sealing assembly as claimed in claim 2 is characterized in that, described first layer diaphragm seal, second layer diaphragm seal and the three-layer sealed are specially alloy steel first layer diaphragm seal, second layer diaphragm seal and the three-layer sealed.
4. a rotary regenerative air preheater seal arrangement is characterized in that, comprising:
Be arranged on the hot junction sector on center, the upper end truss of air preheater;
Be symmetricly set on cold junction sector on center, the lower end truss of air preheater with sector position, described hot junction;
Be arranged on the axial plate of the shell circumferential inner surface of air preheater.
5. air preheater seal arrangement as claimed in claim 4 is characterized in that, also comprises:
Be arranged on the first contact-type flexible sealing assembly of close described hot junction sector one end on the radial rotor dividing plate of air preheater;
Be arranged on the second contact-type flexible sealing assembly of close described cold junction sector one end on the radial rotor dividing plate of air preheater;
Be arranged on the 3rd contact-type flexible sealing assembly of close described axial plate one end on the radial rotor dividing plate of air preheater;
Wherein, the described first contact-type flexible sealing assembly, the second contact-type flexible sealing assembly and the 3rd connect
Touch flexible sealing assembly is as the arbitrary described contact-type flexible sealing assembly of claim 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207388391U CN203098863U (en) | 2012-12-31 | 2012-12-31 | Contact-type flexible sealing assembly and rotary air preheater sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207388391U CN203098863U (en) | 2012-12-31 | 2012-12-31 | Contact-type flexible sealing assembly and rotary air preheater sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203098863U true CN203098863U (en) | 2013-07-31 |
Family
ID=48850268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207388391U Expired - Fee Related CN203098863U (en) | 2012-12-31 | 2012-12-31 | Contact-type flexible sealing assembly and rotary air preheater sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203098863U (en) |
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2012
- 2012-12-31 CN CN2012207388391U patent/CN203098863U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20181231 |