CN114076547A - Rolling flexible dynamic sealing device of air preheater - Google Patents
Rolling flexible dynamic sealing device of air preheater Download PDFInfo
- Publication number
- CN114076547A CN114076547A CN202010821516.8A CN202010821516A CN114076547A CN 114076547 A CN114076547 A CN 114076547A CN 202010821516 A CN202010821516 A CN 202010821516A CN 114076547 A CN114076547 A CN 114076547A
- Authority
- CN
- China
- Prior art keywords
- spring
- sides
- fixed plate
- air preheater
- movable plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 20
- 238000005096 rolling process Methods 0.000 title claims abstract description 17
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/14—Arrangements for sealing elements into header boxes or end plates by dismountable joints by force-joining
Abstract
The invention relates to the technical field of flexible sealing of air preheaters, in particular to a rolling flexible dynamic sealing device of an air preheater, which is used for solving the defects of rapid abrasion, unreliable structure and insufficient clearance compensation quantity of the flexible sealing of the preheater in the prior art and comprises a movable plate and a fixed plate, wherein the upper part of the fixed plate is connected and fixed with the bottom of the movable plate through a hinge shaft, roller clamping grooves are respectively arranged at two sides of the middle position of the movable plate, rollers are arranged at the middle parts of the two roller clamping grooves through roller shafts, spring positioning pins are welded at two sides of the movable plate close to the edges, and spring clamping blocks are respectively arranged at two sides of the fixed plate. The space utilization rate is high, and the sealing effect is good.
Description
Technical Field
The invention relates to the technical field of flexible sealing of air preheaters, in particular to a rolling flexible dynamic sealing device of an air preheater.
Background
The rotary air preheater is a heat exchange equipment for large power station boiler, and it uses the heat of boiler flue gas to heat the air required for combustion so as to raise the efficiency of boiler. The air preheater rotor is from cold attitude to hot attitude, because upper and lower both ends face temperature difference and steel are heated the back rigidity and weaken, produce "mushroom" and warp, if adopt traditional rigid seal piece, partly position (like axial and cold junction radial outside) clearance can diminish, and partly position (like hot junction radial outside) clearance can grow.
It will be appreciated that this in fact presents a problem: the sealed problem of air heater is the cooperation problem of gasket and sector plate, the gasket is automatic pastes tight sector plate and the automatic tracking gasket of sector plate and all can realize reducing the purpose of leaking out, nevertheless no matter reserve suitable cold attitude clearance at axial and cold junction radial position in engineering application, still compensate all the existing problems to the triangle area that leaks out that forms after the hot junction radial position is heated, and traditional flexible sealing technique more exposes wearing and tearing too fast, the structure is unreliable, the not enough scheduling problem of clearance compensation volume, can't satisfy the engineering requirement at all.
Disclosure of Invention
The invention aims to solve the defects that the flexible seal of a preheater in the prior art is still fast in abrasion, unreliable in structure and insufficient in clearance compensation amount, and provides a rolling flexible dynamic seal device of an air preheater.
In order to achieve the purpose, the invention adopts the following technical scheme:
air heater roll flexible dynamic seal device, including fly leaf and fixed plate, it is fixed to be connected through the hinge axle between the upper portion of fixed plate and the bottom of fly leaf, and the gyro wheel draw-in groove has all been seted up to the both sides of fly leaf intermediate position, and the gyro wheel is installed through the gyro wheel axle in the centre of two gyro wheel draw-in grooves to the both sides of fly leaf are close to the edge and all have welded the spring locating pin, the both sides of fixed plate all are provided with the spring fixture block, be provided with the spring between spring locating pin and the spring fixture block.
Preferably, the bottom of the movable plate and the top of the fixed plate are respectively arranged on two sides of the hinge shaft in a staggered manner.
Preferably, the positions of the spring positioning pin and the spring clamping block are in the same vertical plane.
Preferably, the top of the spring is fixedly sleeved on the outer wall of the spring positioning pin, and the bottom of the spring is fixedly installed in the middle of the spring clamping block.
The rolling flexible dynamic sealing device of the air preheater provided by the invention is contacted with the movable plate or the fixed plate in a rolling mode instead of a dry friction mode of a plurality of flexible sealing devices, so that the relative slippage between the contact surface of the roller and the sealing surface of the movable plate or the fixed plate is avoided, the degree of cutting abrasion is greatly reduced, the rolling friction coefficient is far smaller than the sliding friction coefficient, the influence of the rolling friction coefficient on the running current of the air preheater is also reduced, and meanwhile, in a limited installation space, the rolling elastic sealing device of the air preheater provided by the invention can obtain a large compensation performance, can completely adapt to the change of dynamic and static gaps under various working conditions, and is high in space utilization rate and good in sealing effect.
Drawings
FIG. 1 is a front view of an air preheater rolling flexible dynamic seal arrangement according to the present invention;
FIG. 2 is a side view of the spring mounting of the rolling flexible dynamic sealing device of the air preheater according to the present invention;
FIG. 3 is a side view of the roller mounting of the rolling flexible dynamic sealing device of the air preheater provided by the invention.
In the figure: the device comprises a movable plate 1, a roller clamping groove 11, a spring positioning pin 12, a fixed plate 2, a roller 3, a roller shaft 31, a hinge shaft 4, a spring clamping block 5 and a spring 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, the rolling flexible dynamic sealing device of the air preheater comprises a movable plate 1 and a fixed plate 2, the upper portion of the fixed plate 2 is fixedly connected with the bottom of the movable plate 1 through a hinge shaft 4, roller clamping grooves 11 are formed in two sides of the middle position of the movable plate 1, the roller clamping grooves 11 are used for installing and fixing rollers 3, the rollers 3 are installed in the middle of the two roller clamping grooves 11 through roller shafts 31, the roller shafts 31 aim to install the rollers 3 in the roller clamping grooves 11 conveniently, spring positioning pins 12 are welded on two sides of the movable plate 1 close to the edges, spring clamping blocks 5 are arranged on two sides of the fixed plate 2, springs 6 are arranged between the spring positioning pins 12 and the spring clamping blocks 5, and the spring positioning pins 12 and the spring clamping blocks 5 are used for limiting the springs 6.
The bottom of the movable plate 1 and the top of the fixed plate 2 are respectively arranged on two sides of the hinge shaft 4 in a staggered manner, the spring positioning pins 12 and the spring clamping blocks 5 are positioned in the same vertical plane, the outer walls of the spring positioning pins 12 are fixedly sleeved at the top of the spring 6, and the bottom of the spring 6 is fixedly installed in the middle of the spring clamping blocks 5.
In this embodiment, the roller shaft 31 penetrates the middle of the roller 3, and the two ends of the roller shaft 31 are respectively clamped in the roller clamping grooves 11 at the two sides, the roller 3 is fixed between the two roller clamping grooves 11, then the top of the spring 6 is sleeved outside the spring positioning pin 12, and the bottom thereof is fixedly assembled with the spring clamping block 5 through the fixing pin.
When the movable plate 1 is in work, the movable plate 1 is stressed to rotate downwards to one side close to the fixed plate 2, the spring 6 is stressed and extruded along with the downward rotation of the movable plate, and when the extrusion reaches the maximum deformation amount, the spring 6 applies a reaction force to jack the movable plate 1 back, so that the movable plate 1 can be reset.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. Air heater rolls flexible dynamic seal device, including fly leaf (1) and fixed plate (2), its characterized in that, be connected fixedly through hinge shaft (4) between the upper portion of fixed plate (2) and the bottom of fly leaf (1), gyro wheel draw-in groove (11) have all been seted up to the both sides of fly leaf (1) intermediate position, and gyro wheel (3) are installed through gyro wheel axle (31) in the centre of two gyro wheel draw-in grooves (11) to the both sides of fly leaf (1) are close to the edge and all have welded spring locating pin (12), the both sides of fixed plate (2) all are provided with spring fixture block (5), be provided with spring (6) between spring locating pin (12) and spring fixture block (5).
2. An air preheater rolling flexible dynamic sealing device as claimed in claim 1, wherein the bottom of the movable plate (1) and the top of the fixed plate (2) are respectively arranged on both sides of the hinge shaft (4) in a staggered manner.
3. An air preheater rolling flexible dynamic sealing device as claimed in claim 1, wherein the positions of the spring positioning pin (12) and the spring clamping block (5) are in the same vertical plane.
4. The rolling flexible dynamic sealing device of the air preheater as claimed in claim 1, wherein the top of the spring (6) is fixedly sleeved on the outer wall of the spring positioning pin (12), and the bottom of the spring (6) is fixedly installed in the middle of the spring clamping block (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010821516.8A CN114076547A (en) | 2020-08-15 | 2020-08-15 | Rolling flexible dynamic sealing device of air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010821516.8A CN114076547A (en) | 2020-08-15 | 2020-08-15 | Rolling flexible dynamic sealing device of air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114076547A true CN114076547A (en) | 2022-02-22 |
Family
ID=80280896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010821516.8A Pending CN114076547A (en) | 2020-08-15 | 2020-08-15 | Rolling flexible dynamic sealing device of air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114076547A (en) |
-
2020
- 2020-08-15 CN CN202010821516.8A patent/CN114076547A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220222 |
|
| WD01 | Invention patent application deemed withdrawn after publication |