CN203454191U - Air preheater gear type flexible sealing device and sector plate containing the same - Google Patents
Air preheater gear type flexible sealing device and sector plate containing the same Download PDFInfo
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- CN203454191U CN203454191U CN201320347169.5U CN201320347169U CN203454191U CN 203454191 U CN203454191 U CN 203454191U CN 201320347169 U CN201320347169 U CN 201320347169U CN 203454191 U CN203454191 U CN 203454191U
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- gear type
- gear
- air preheater
- stage clip
- flexible 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 discloses an air preheater gear type flexible sealing device and a sector plate containing the same. The flexible sealing device comprises a fixed plate, a movable plate and a compression spring support mechanism for supporting the movable plate, wherein one end of the movable plate is rotatably connected with the fixed plate, the other end of the movable plate is provided with a gear type rolling mechanism which is not lower than the movable plate, and the compression spring support mechanism is arranged on the fixed plate. The gear type flexible sealing device is contacted with the sector plate or the arc plate in the gear rack engagement way in replacement of dry friction way of the common flexible sealing devices, the microscopic contact points, lines or surfaces do not relatively slide and cutting gear problem does not occur, so that the technology greatly prolongs the service life of the flexible sealing device, and the air leak rate of the air preheater can be kept relatively low for a long time.
Description
Technical field
The fanning strip that the utility model relates to a kind of air preheater gear type flexible seal device and comprises it, belongs to air pre-heater sealing field.
Background technology
Air preheater is a kind of heat-exchange apparatus for large-sized station boiler, and it utilizes the heat of boiler smoke to carry out the required air of heating flame, with this, improves the efficiency of boiler.
Under hot running status, each parts of air preheater all can expand and Strength Changes because being heated, therefore need to reserve seal clearance between rotor and fanning strip, arc when cold conditions is installed.Generally speaking, seal clearance increases and to change with load, except hot junction radially away from the gap of central tube position can become large, all the other most of gaps all can diminish.
For guaranteeing the security of air preheater operation, reserved seal clearance need be considered the mushroom deformation amount of limiting condition lower rotor part.This mushroom deformation is subject to various factors, is difficult to accurate Calculation, adds the impact of the factors such as the position deviation of rotor center deviation, each sealing surface and installation deviation, the problem that air preheater ubiquity air leak rate of air curtain is bigger than normal.Air preheater adopts the sealing of conventional rigid diaphragm seal, and air leak rate of air curtain is 6%-10% when operating mode is good, even reaches 20%-30% during poor sealing.
Flexible sealing device of air preheater is numerous in the market, has also been widely used in scrap build, has obtained considerable income.Flexible seal device is arranged on air preheater rotor dividing plate, contacts with fanning strip or arc, can adapt to the variation of dynamic and static gaps under different operating modes, greatly reduces seal clearance, thereby reduces the air leak rate of air curtain of air preheater.
But current all flexible seal devices are all the modes with dry friction to be contacted with fanning strip or arc, and initial operating stage electric current increases obviously, self wearing and tearing and fanning strip or arc rapid wear, the life-span is partially short, and makes troubles to the maintenance in equipment later stage.
Along with fired power generating unit is to large capacity, high parameter future development, air preheater rotor diameter becomes increasing, under cold and hot state, dynamic and static gaps changes also increasing, as changing, dynamic and static gaps under 1000MW unit air preheater cold and hot state surpasses 50mm, but current nearly all flexible seal device can only allow the distortion of maximum 10mm in limited installing space, can not meet the variation of dynamic and static gaps under the various operating modes of air preheater far away, greatly affected its sealing effectiveness.
At present a lot of flexible seal devices are subject to the restriction of installing space, have designed too tiny structural member, and air preheater working environment is very severe, and high temperature, dust and selective sootblowing all very easily damage primary structural component.Compare with conventional rigid diaphragm seal, the poor reliability of current flexible seal device, the life-span is short, cannot guarantee safety and the economical operation of air preheater in the overhaul life.
Utility model content
The fanning strip that the purpose of this utility model is to provide a kind of air preheater gear type flexible seal device and comprises it.
For solving the problems of the technologies described above, the technical solution of the utility model is:
Air preheater gear type flexible seal device, comprises fixed head, portable plate and is used for the stage clip supporting mechanism of movable support plate; One end and the fixed head of described portable plate are rotationally connected, and the other end is provided with gear type rolling mechanism, and gear type rolling mechanism is not less than portable plate; Described stage clip supporting mechanism is located on fixed head.
In order to obtain better flexibility, make a concession and the characteristic contacting, described stage clip supporting mechanism comprises base, stage clip and jacking block, and base is connected on fixed head, and jacking block is connected on portable plate, and stage clip is installed between base and jacking block.
The stability of rotating in order to improve portable plate, described base is provided with back stop core, and the bottom of stage clip is socketed in the periphery of back stop core, and the top of stage clip contacts with jacking block, and the face contacting with stage clip on jacking block is sphere.
Above-mentioned back stop core and base can be integrative-structures, can be also that welding, bolt connect or other annexation.
In order to improve the reliability of device, in described stage clip supporting mechanism, exist the position of sliding friction to be equipped with sprayed coating.
In above-mentioned stage clip supporting mechanism, exist the position of sliding friction to refer to: stage clip each member of whole device in compression and the process of upspringing may exist the position of sliding friction, applicant finds after deliberation to shoot out arranging of layer and has improved material surface hardness and fineness.
In order to save material, prepare easy, guarantee the performance of sealing device simultaneously, described gear type rolling mechanism comprises mandrel, gear, connector and lock tune nut, connector is ring-type, gear, connector and lock adjust nut to be socketed in successively on mandrel, gear is rotatably connected on mandrel, and lock adjusts nut thread to be connected on mandrel, and mandrel is connected on portable plate by connector.Above-mentioned lock adjusts nut to play good fixation to mandrel.Above-mentioned connector and portable plate can be one-body molded, also can link together by modes such as welding.
In order to guarantee that gear is easy to roll, between described gear and mandrel, be provided with at least two row balls, described ball is Self-lubricating ball.
In order to save material, to improve sealing effectiveness, one end that described portable plate is provided with gear type rolling mechanism is semi-cylindrical, and half-terete external diameter is less than the external diameter of gear teeth tip circle; Gear type rolling mechanism has two, is located at respectively half-terete two ends.
Going down of the sealing effectiveness causing because of irresistible distortion for anti-locking apparatus facilitates device to install simultaneously, and described fixed head is bending structure; Described fixed head is provided with installation waist-shaped hole.
Being designed with of above-mentioned bending structure helps the impact that sealing effectiveness that slowing device causes because of irresistible distortion goes down.
The design of above-mentioned installation waist-shaped hole is for the ease of air preheater gear type flexible seal device is arranged on rotor dividing plate.
The fanning strip of the preheater that comprises above-mentioned air preheater gear type flexible seal device, is provided with gear guide block in entry position and/or the exit position of fanning strip, and gear guide block is provided with and intermeshing the first tooth bar of gear type rolling mechanism.
In order to realize the progressive rolling movement of gear, on fanning strip, the segmental arc of the wheeled rolling mechanism movement locus of corresponding teeth is provided with and intermeshing the second tooth bar of gear type rolling mechanism.
The design that said gear tooth bar is meshed can guarantee that gear is all the time in rotary state, weakens dust pollution to rotating the impact of flexibility.
In order to give full play to the performance of above-mentioned air preheater gear type flexible seal device, be preferably arranged on hot junction radially on dividing plate.
The fanning strip regulating system of the preheater that comprises above-mentioned air preheater gear type flexible seal device: comprise program-control cabinet, executing agency and adjusting rod that order is joined, described adjusting rod is connected with hot junction fanning strip.
Above-mentioned each parts material therefor should be selected has high temperature resistant, corrosion-resistant, anti abrasive material simultaneously.
The technology that the utility model is not particularly limited is prior art.
The utility model air preheater gear type flexible seal device replaces the mode of numerous flexible seal device dry friction to contact with fanning strip or arc in the mode of rack and pinion engagement, all there is not relative slippage in microcosmic contact point, line or face, therefore there is not the problem of cutting abrasion, this technological improvement has extended the service life of flexible seal device greatly, and air preheater can keep lower air leak rate of air curtain for a long time.
Accompanying drawing explanation
Fig. 1 is the front view of air preheater gear type flexible seal device in the utility model embodiment 1.
Fig. 2 is that the A-A of Fig. 1 is to profile.
Fig. 3 is that the B-B of Fig. 2 is to profile.
Fig. 4 is that the C-C of Fig. 2 is to profile.
Fig. 5 is that the D-D of Fig. 2 is to profile.
Fig. 6 is that the E-E of Fig. 2 is to profile.
Fig. 7 is that the F-F of Fig. 2 is to profile.
Fig. 8 is that the G-G of Fig. 2 is to profile.
Fig. 9 is air preheater gear type flexible seal device course of work schematic diagram in embodiment 1.
Figure 10 is that air preheater cold and hot gap changes contrast schematic diagram, each gap, position when left side represents cold conditions, and right side represents each gap, position situation (adopt conventional rigid Sealing Technology and be not equipped with LCS system) when hot.
Figure 11 is the schematic diagram of the utility model fanning strip regulating system.
Figure 12 is the schematic diagram that Figure 11 fanning strip sealing surface tooth bar is arranged.
In figure, 1 is fixed head, and 2 is portable plate, and 3 is mandrel, and 4 is gear, 5 is ball, and 6 is connector, and 7 adjust nut for lock, and 8 is base, and 9 is stage clip, 10 is jacking block, and 11 is back stop core, and 12 is gear guide block, and 13 is the second tooth bar, 14 is hot junction fanning strip, and 15 is axial arc, and 16 is cold junction fanning strip, and 17 is rotor, 18 is radially dividing plate of hot junction, and 19 is adjusting rod ，20Wei executing agency, and 21 is program-control cabinet, 22 for controlling data, and 23 be cold conditions, and 24 is hot, and 25 is the radially triangle region of leaking out, hot junction.
The specific embodiment
In order to understand better the utility model, below in conjunction with embodiment, further illustrate content of the present utility model, but content of the present utility model is not only confined to the following examples.
Air preheater gear type flexible seal device as shown in the figure, comprise fixed head, portable plate and be used for the stage clip supporting mechanism of movable support plate, one end of portable plate and fixed head chain connection, the other end is provided with gear type rolling mechanism, gear type rolling mechanism is not less than portable plate, and stage clip supporting mechanism comprises base, stage clip and jacking block, and base is connected on fixed head, jacking block is connected on portable plate, and stage clip is installed between base and jacking block; Base is provided with back stop core, and the bottom of stage clip is socketed in the periphery of back stop core, and the top of stage clip contacts with jacking block, and the face contacting with stage clip on jacking block is sphere; In stage clip supporting mechanism, exist the position of sliding friction to be equipped with sprayed coating.
Gear type rolling mechanism comprises mandrel, gear, connector and lock tune nut, connector is ring-type, and gear, connector and lock adjust nut to be socketed in successively on mandrel, and gear is rotatably connected on mandrel, lock adjusts nut thread to be connected on mandrel, and mandrel is connected on portable plate by connector; Between gear and mandrel, be provided with two row balls, ball is Self-lubricating ball.
One end that portable plate is provided with gear type rolling mechanism is semi-cylindrical, and half-terete external diameter is less than the external diameter of gear teeth tip circle, and half-terete two ends are respectively equipped with a gear type rolling mechanism.
Fixed head is bending structure; Fixed head is provided with installation waist-shaped hole.
The fanning strip of the preheater that comprises above-mentioned air preheater gear type flexible seal device, is provided with gear guide block in entry position and the exit position of fanning strip, and gear guide block is provided with and intermeshing the first tooth bar of gear type rolling mechanism; On fanning strip, the segmental arc of the wheeled rolling mechanism movement locus of corresponding teeth is provided with and intermeshing the second tooth bar of gear type rolling mechanism.
Claims (10)
1. air preheater gear type flexible seal device, is characterized in that: comprise fixed head, portable plate and be used for the stage clip supporting mechanism of movable support plate; One end and the fixed head of described portable plate are rotationally connected, and the other end is provided with gear type rolling mechanism, and gear type rolling mechanism is not less than portable plate; Described stage clip supporting mechanism is located on fixed head.
2. air preheater gear type flexible seal device as claimed in claim 1, it is characterized in that: described stage clip supporting mechanism comprises base, stage clip and jacking block, base is connected on fixed head, and jacking block is connected on portable plate, and stage clip is installed between base and jacking block.
3. air preheater gear type flexible seal device as claimed in claim 2, it is characterized in that: described base is provided with back stop core, the bottom of stage clip is socketed in the periphery of back stop core, and the top of stage clip contacts with jacking block, and the face contacting with stage clip on jacking block is sphere.
4. the air preheater gear type flexible seal device as described in claim 1-3 any one, is characterized in that: in described stage clip supporting mechanism, exist the position of sliding friction to be equipped with sprayed coating.
5. the air preheater gear type flexible seal device as described in claim 1-3 any one, it is characterized in that: described gear type rolling mechanism comprises mandrel, gear, connector and lock tune nut, connector is ring-type, gear, connector and lock adjust nut to be socketed in successively on mandrel, gear is rotatably connected on mandrel, lock adjusts nut thread to be connected on mandrel, and mandrel is connected on portable plate by connector.
6. air preheater gear type flexible seal device as claimed in claim 5, is characterized in that: between described gear and mandrel, be provided with at least two row balls, described ball is Self-lubricating ball.
7. the air preheater gear type flexible seal device as described in claim 1-3 any one, is characterized in that: one end that described portable plate is provided with gear type rolling mechanism is semi-cylindrical, and half-terete external diameter is less than the external diameter of gear type rolling mechanism; Gear type rolling mechanism has two, is located at respectively half-terete two ends.
8. the air preheater gear type flexible seal device as described in claim 1-3 any one, is characterized in that: described fixed head is bending structure; Described fixed head is provided with installation waist-shaped hole.
9. a fanning strip, it is characterized in that: comprise the air preheater gear type flexible seal device described in claim 1-8 any one, entry position and/or exit position at fanning strip are provided with gear guide block, and gear guide block is provided with and intermeshing the first tooth bar of gear type rolling mechanism.
10. fanning strip as claimed in claim 9, is characterized in that: on fanning strip, the segmental arc of the wheeled rolling mechanism movement locus of corresponding teeth is provided with and intermeshing the second tooth bar of gear type rolling mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320347169.5U CN203454191U (en) | 2013-06-17 | 2013-06-17 | Air preheater gear type flexible sealing device and sector plate containing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320347169.5U CN203454191U (en) | 2013-06-17 | 2013-06-17 | Air preheater gear type flexible sealing device and sector plate containing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203454191U true CN203454191U (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320347169.5U Expired - Lifetime CN203454191U (en) | 2013-06-17 | 2013-06-17 | Air preheater gear type flexible sealing device and sector plate containing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203454191U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613493A (en) * | 2015-01-26 | 2015-05-13 | 张洪福 | Rotating type air pre-heater sector plate |
-
2013
- 2013-06-17 CN CN201320347169.5U patent/CN203454191U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613493A (en) * | 2015-01-26 | 2015-05-13 | 张洪福 | Rotating type air pre-heater sector plate |
| CN104613493B (en) * | 2015-01-26 | 2017-03-15 | 张洪福 | A kind of rotary regenerative air preheater fanning strip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170306 Address after: 221116 Kangping high tech Development Zone, Jiangsu Industrial Park, South Road, Xuzhou, No. 6 East Road, Kui River Patentee after: JIANGSU TURBINE ELECTRIC POWER TECHNOLOGY CO.,LTD. Address before: 210036 Nanjing, Gulou District, Jiangsu Phoenix West Street, building 150, room 3, No. 105 Patentee before: NANJING BOWO SCIENCE & TECHNOLOGY DEVELOPMENT CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |