CN103195926A - Double-piece differential type sealing device of annular guide rail support - Google Patents
Double-piece differential type sealing device of annular guide rail support Download PDFInfo
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- CN103195926A CN103195926A CN2013101077665A CN201310107766A CN103195926A CN 103195926 A CN103195926 A CN 103195926A CN 2013101077665 A CN2013101077665 A CN 2013101077665A CN 201310107766 A CN201310107766 A CN 201310107766A CN 103195926 A CN103195926 A CN 103195926A
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- guide rail
- metal diaphragm
- diaphragm seal
- seal
- shaped guide
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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 invention relates to a double-piece differential type sealing device adopting an annular guide rail support. The sealing device is used for sealing a large boiler rotary air preheater. The sealing device ensures that a fan-shaped plate and a radial sealing piece of the air preheater are located in a stable small gap in a long term, air leakage quantity is small, and boiler operation efficiency is improved. By means of the same principle, a cold end fan-shaped plate and a sealing piece of the air preheater are ensured to be in a stable small gap in a long term, and an axial sealing partition plate and the sealing piece are ensured to be in a stable small gap in a long term.
Description
Technical field
Patent of the present invention is a kind of biplate differential type seal arrangement that adopts ring-shaped guide rail to support, and is used for the sealing of large-sized boiler Ljungstrom air heater.
Background technique
Ljungstrom air heater is the afterbody heat transmission equipment that extensively adopts on the big-and-middle-sized station boiler, and its main effect is: reclaim flue gas heat, improve boiler cold wind temperature, reduce exhaust gas temperature, thereby reach the purpose of saving combustion, improving efficiency of boiler.
Ljungstrom air heater is compared with tubular type, it is few to have compact structure, steel consumption, advantages such as easy arrangement, but the air leak rate of air curtain height insoluble problem that is Ljungstrom air heater, so in the Ljungstrom air heater technology, prevent or reduce that to leak out be that sealing technique is occupied very consequence.
The air leak rate of air curtain size key of Junker formula air preheater is the control (there are the contradiction that is difficult to overcome in the needs of rotor motion and the needs of sealing) to the rotor seal gap, prior art has sector automatic adjustment technology, fixed sealing technique, brush seal technology in the world, spring contact seal technology etc., it respectively has pluses and minuses, but air leak rate of air curtain is substantially all bigger, and along with the rising of working time and temperature becomes greatly gradually, has sizable room for improvement.
Summary of the invention
Patent of the present invention has been invented the single-ended fixing seal device of biplate differential type (2,5) sealing surface that a kind of employing ring-shaped guide rail (1) supports at the characteristics of Ljungstrom air heater, is used for the sealing of large-sized boiler rotary regenerative air preheater.
Patent of the present invention is according to the diameter of Ljungstrom air heater, and the ring-shaped guide rail (1) that adopts quantity not wait connects the metal diaphragm seal of radially evenly arranging (2).
Patent of the present invention adopts the gap between lash adjusting device (3) adjusting metal diaphragm seal and the sector (4).
Metal diaphragm seal (2) forms radial seal with rotor radial dividing strip (5) in the patent of the present invention, radially change is big gradually for the deformation of generation " mushroom " shape along with air preheater rotor expands in high temperature in rotor radial dividing strip (5) deformation, produces relative separation between metal diaphragm seal (2) and rotor radial dividing strip (5).
The size of the guide blot (6) of the gap in the patent of the present invention between metal diaphragm seal (2) and the rotor radial dividing strip (5) during by product specification determines.
In the patent of the present invention, when air preheater rotor rotates, metal diaphragm seal (2), radially dividing strip (5) and belt guide rail (1) rotate simultaneously, when metal diaphragm seal (2) process sector (4), because the restriction of lash adjusting device (3), drive metal diaphragm seal (2) by ring-shaped guide rail (1) and keep the distance of setting with sector (4), guarantee that seal clearance is constant setting value, thereby the different air of effectively isolating the sector both sides, reduce mutual leakage, improve heat exchange efficiency.
Description of drawings
The concrete structure of patent of the present invention is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the profile schematic representation of Ljungstrom air heater.
Fig. 2 is the hemisection face schematic representation of Ljungstrom air heater.
Fig. 3 adopts "T"-shaped belt guide rail to implement schematic representation among the present invention.
Fig. 4 adopts the belt guide rail of " recessed " shape to implement schematic representation among the present invention.
Fig. 5 adopts "T"-shaped belt guide rail schematic cross-section among the present invention.
Fig. 6 adopts the belt guide rail schematic cross-section of " recessed " shape among the present invention.
Fig. 7 adopts "T"-shaped belt guide rail to embed the sector structural representation among the present invention.
The explanation of each parts among Fig. 1,2,3,4,5,6: 1. the guide rail that goes in ring, 2. metal diaphragm seal, 3. lash adjusting device, 4. sector, 5. dividing strip radially, 6. guide blot is 7. axially cut apart ring.
Above schematic representation only is the preferred embodiment of patent of the present invention, and all equivalences of making according to Patent right requirement scope of the present invention change and revise, and all should belong to the covering scope of patent of the present invention.
Claims (6)
1. patent of the present invention is a kind of biplate differential type seal arrangement that adopts ring-shaped guide rail to support, be used for the sealing of large-sized boiler rotary regenerative air preheater, be characterized in the diameter according to preheater, the ring-shaped guide rail (1) that adopts quantity not wait connects the metal diaphragm seal of radially evenly arranging (2), by the gap between lash adjusting device (3) adjusting metal diaphragm seal and the sector (4); Wherein metal diaphragm seal (2) forms radial seal with rotor radial dividing strip (5); Radially change is big gradually for the deformation of generation " mushroom " shape along with air preheater rotor expands in high temperature in rotor radial dividing strip (5) deformation, produces relative separation between metal diaphragm seal (2) and rotor radial dividing strip (5); The size of the guide blot (6) of the gap between metal diaphragm seal (2) and the rotor radial dividing strip (5) during by product specification determines; When air preheater rotor rotates, metal diaphragm seal (2), radially dividing strip (5) and belt guide rail (1) rotate simultaneously, when metal diaphragm seal (2) process sector (4), because the restriction of lash adjusting device (3), can guarantee that seal clearance is constant setting value, thereby the different air of effectively isolating the sector both sides reduce mutual leakage, improve heat exchange efficiency.
2. the single-ended fixing seal apparatus features of biplate differential type sealing surface that supports according to the described ring-shaped guide rail of claim 1 is that gap between metal diaphragm seal and the sector (4) is set during by design and debugging, has nothing to do with the equipment operating conditions.
3. the single-ended fixing seal apparatus features of biplate differential type sealing surface that supports according to the described ring-shaped guide rail of claim 1 is to adopt differential structure between metal diaphragm seal (2) and the rotor radial dividing strip (5), produces the relative separation motion that does not wait when different temperature operations vertically.
4. the single-ended fixing seal apparatus features of biplate differential type sealing surface that supports according to the described ring-shaped guide rail of claim 1 is the size decision of gap between metal diaphragm seal (2) and the rotor radial dividing strip (5) guide blot (6) during by product specification.
5. the single-ended fixing seal apparatus features of biplate differential type sealing surface that supports according to the described ring-shaped guide rail of claim 1 is that the width of metal diaphragm seal (2) radially becomes big gradually.
6. the single-ended fixing seal apparatus features of biplate differential type sealing surface that supports according to the described ring-shaped guide rail of claim 1 is on the lash adjusting device (3) the radially-directed groove to be arranged, and rises in ring-shaped guide rail (1) and sector (4) heat and can adjust the position automatically when inconsistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101077665A CN103195926A (en) | 2013-03-31 | 2013-03-31 | Double-piece differential type sealing device of annular guide rail support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101077665A CN103195926A (en) | 2013-03-31 | 2013-03-31 | Double-piece differential type sealing device of annular guide rail support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103195926A true CN103195926A (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101077665A Pending CN103195926A (en) | 2013-03-31 | 2013-03-31 | Double-piece differential type sealing device of annular guide rail support |
Country Status (1)
| Country | Link |
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| CN (1) | CN103195926A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841186A (en) * | 2016-06-03 | 2016-08-10 | 上海市东方海事工程技术有限公司 | Linear differential expansion type driving device |
| CN106884986B (en) * | 2017-03-14 | 2018-06-26 | 罗小果 | The dynamic sealing device and method that a kind of high speed moves back and forth |
| CN109631077A (en) * | 2019-01-09 | 2019-04-16 | 李康康 | A kind of rotary regenerative air preheater for coal-burning boiler |
| CN109631076A (en) * | 2019-01-09 | 2019-04-16 | 李康康 | A kind of air preheater |
-
2013
- 2013-03-31 CN CN2013101077665A patent/CN103195926A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841186A (en) * | 2016-06-03 | 2016-08-10 | 上海市东方海事工程技术有限公司 | Linear differential expansion type driving device |
| CN106884986B (en) * | 2017-03-14 | 2018-06-26 | 罗小果 | The dynamic sealing device and method that a kind of high speed moves back and forth |
| CN109631077A (en) * | 2019-01-09 | 2019-04-16 | 李康康 | A kind of rotary regenerative air preheater for coal-burning boiler |
| CN109631076A (en) * | 2019-01-09 | 2019-04-16 | 李康康 | A kind of air preheater |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130710 |