CN202303435U - Compound-type sealing brush for air pre-heater - Google Patents
Compound-type sealing brush for air pre-heater Download PDFInfo
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- CN202303435U CN202303435U CN2011203969358U CN201120396935U CN202303435U CN 202303435 U CN202303435 U CN 202303435U CN 2011203969358 U CN2011203969358 U CN 2011203969358U CN 201120396935 U CN201120396935 U CN 201120396935U CN 202303435 U CN202303435 U CN 202303435U
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- brush
- supporting plate
- air preheater
- flexible sheets
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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 a compound-type sealing brush for an air pre-heater, comprising a baffle, a support plate, a brush bar and a support sheet, wherein the brush bar comprises a clamping piece, a brush wire bundle, a flexible sheet and a core wire; the baffle is adhered with a part of the support plate to form fixed connection, an open fixing cavity for fixing the brush bar is formed at the separated place of the baffle and the support plate, and the clamping piece located at the outmost side of the brush bear forms fixed connection with the baffle and the support plate which compose the fixing cavity; and the root of the support sheet is fixed between the clamping piece and the support plate, and the free end of the support sheet stretches outwards. The compound-type sealing brush for an air pre-heater disclosed by the utility model has the advantages of being capable of being formed by compression moulding process, high in moulding accuracy, not easy to deform during welding due to ingenious bending structure, convenient in assembly, capable of greatly increasing yield as well as greatly improving sealing performance and use reliability, more convenient in installation and debugging, and capable of completely replacing the present sealing sheet.
Description
Technical field
The utility model relates to a kind of sealing brush, is specifically related to a kind of air preheater composite seal brush, belongs to sealing brush technical field.
Background technology
Heat power plant boiler adapted air preheater generally has two kinds of tubular type and swingings, wherein rotary regenerative air preheater because of compact conformation, characteristics such as floor space is little, the steel consumption amount is little by the large-scale power station extensive use.Because rotary regenerative air preheater adopts the single track Sealing Technology more, adds installation deviation and factors such as long-time running wearing and tearing and thermal deformation, causes the air leak rate of air curtain of unit bigger than normal, be the ubiquitous problem of station boiler of using this equipment.
Leaking out of rotary regenerative air preheater can be divided into two parts: structure is leaked out (or claiming to carry to leak out) and is directly leaked out.Because air preheater inside is divided into some storehouses lattice, it is inevitably that this structure decision structure is leaked out, and generally speaking, the leak out share of the total inleakage of duty gas preheater of this part is less, less than 10%.The form of mainly leaking out of air preheater is for directly leaking out; Inevitably there is the gap between the sound of rotary regenerative air preheater; The blast of wind pressure ratio secondary blast and fume side is high again a lot; Under the effect of pressure reduction, wind direction secondary side and fume side are directly leaked and the secondary wind direction fume side is leaked out.Leaking out not only increases the boiler exhaust gas heat loss, and has increased the weight of also to have increased the blower fan power consumption because of the low equipment cold end corrosion that causes of cigarette temperature drop, also can directly influence boiler output because of deficiency in draught when the problem of leaking out is serious.
The rotary regenerative air preheater conventional seals adopts the gapped Sealing Technology of rigidity, between sound, keeps a minimum clearance, reaches the minimum of leaking out.Because the mushroom deformation problem of air preheater rotating cylinder, and this distortion constantly changes with the load environment temperature, makes static seal be difficult to reach the gap width an of the best.The gap is too small, is prone to produce the sound friction between diaphragm seal and the fanning strip, and direct threats is to the safe operation of equipment; Excesssive gap, the air-heater leakage rate is big, has influenced the economical operation of unit again.
Air preheater brush Sealing Technology is the air preheater flexible sealing technology of newly-developed, and its core component brush silk adopts a high-temperature alloy to process, and the meeting of brush silk freely change angle and cooperates with it when contact with fanning strip, forms a sealing surface.Coefficient of friction between brush silk and the fanning strip is less, and both can not cause rigid damage to fanning strip at flexible contact.The brush silk has good resilience, when getting into nonclient area, can restore to the original state rapidly, thereby can keep lower air leak rate of air curtain for a long time.The sealing of air preheater brush is rotated jerk value requirement reduction to the both ends of the surface of rotating cylinder and the depth of parallelism, flatness and the rotating cylinder of fanning strip; Maintenance duration and workload have been reduced; Can also adapt to simultaneously rotating cylinder mushroom deformation in various degree under the different load, make that the air leak rate of air curtain of air preheater can both remain on a reduced levels under arbitrary load.For the air preheater that adopts common rigidity diaphragm seal sealing, its air leak rate of air curtain is 6%-10% when operating mode is good, during poor sealing even reach 20%-30%.Test data shows, adopts the sealing of air preheater brush can be so that its air leak rate of air curtain is reduced to 3%-6%, and receives the influence of load variations less, can keep higher sealing effectiveness for a long time.
Air preheater brush seal operation environment is very abominable, contains gases such as oxysulfide, nitrogen oxide in the high-temperature flue gas, is prone to form dew point corrosion at cold junction, is mingled with solid particles such as coal ash simultaneously in the flue gas, constantly washes away sealing device.Consider above factor; For to reach better sealing effectiveness, generally install a brush sealing assembly additional, but not directly change former diaphragm seal simultaneously in the former diaphragm seal of air preheater position; So air preheater rotating cylinder gross weight increases; Loading ability of bearing increases, and starting current also can increase thereupon, to the electric part requirement raising of equipment.
Chinese patent ZL 200620113790.5 discloses the rotary regenerative air preheater that has brush sealing, pointed out sealing property that the brush sealing is excellent and with the assembly relation of each parts of air preheater, but not to the specific constructive form explanation of brush sealing.Air preheater equipment is huge, and brush sealing adopts the mode of complete assembly welding to have problems such as welding deformation, thermal stress are big, thus nowadays on the market common air preheater to brush seal structure be bolt clamping structure mostly.The whole sealing device complex structure, unusual heavy, starting current increases comparatively obvious.Complicated clamping can not guarantee precision, and production efficiency is also lower.The air preheater brush is sealed under the duty and generally contacts with the fanning strip interference; Receive an intermittent impulsive force along direction of rotation inevitably; And constantly in cold and hot medium, circulate; Each parts is prone to produce fatigue damage, and firm degree can't guarantee, exists the brush silk to drop, brush hidden danger such as bar comes off.
The utility model content
For solving the problems of the technologies described above, the utility model provide a kind of formed precision higher, have that bending structure cleverly makes that welding is not yielding, also air preheater composite seal brush comparatively easily of assembling simultaneously.
The utility model adopts following technical scheme:
A kind of air preheater composite seal brush comprises baffle plate, supporting plate, brush bar and support chip, and above-mentioned brush bar comprises: clamping element, brush tow, flexible sheets, heart yearn; Above-mentioned baffle plate is fitted to constitute with the part of above-mentioned supporting plate and is fixedly connected; Above-mentioned baffle plate forms the lock chamber that is used for fixing above-mentioned brush bar that opens wide with the place of separation of above-mentioned supporting plate, is positioned at the outermost above-mentioned clamping element of above-mentioned brush bar and is fixedly connected with the supporting plate formation with the baffle plate that constitutes the said fixing chamber; The root of above-mentioned support chip is fixed between above-mentioned clamping element and the supporting plate, and its free end is protruding; The root of above-mentioned flexible sheets is wrapped in the periphery of above-mentioned heart yearn; The root of above-mentioned brush tow is wrapped in the periphery of above-mentioned flexible sheets root; The root of above-mentioned heart yearn and flexible sheets, brush tow is fixed in the open cavity of above-mentioned clamping element; The free end of flexible sheets, brush tow stretches out the open cavity of above-mentioned clamping element and is higher than the top of above-mentioned baffle plate and supporting plate, and the part that above-mentioned flexible sheets and brush tow stretch out above-mentioned clamping element open cavity is between above-mentioned baffle plate and support chip.
Aforesaid a kind of air preheater composite seal brush is characterized in that above-mentioned flexible sheets is walked around above-mentioned heart yearn doubling, forms the double-decker of fitting; Above-mentioned brush tow is for forming through the periphery that doubling is centered around above-mentioned flexible sheets with a branch of brush silk, and the two ends of this a branch of brush silk are as the free end of above-mentioned brush tow.
Aforesaid a kind of air preheater composite seal brush is characterized in that, is filled with adhesive glue between above-mentioned clamping element inwall and the above-mentioned brush tow root, between above-mentioned brush tow root and the above-mentioned flexible sheets root.
Aforesaid a kind of air preheater composite seal brush is characterized in that the free end of above-mentioned support chip is through Passivation Treatment.
Aforesaid a kind of air preheater composite seal brush is characterized in that the free end disappearance of above-mentioned flexible sheets is in above-mentioned brush tow.
Aforesaid a kind of air preheater composite seal brush is characterized in that the cross sectional shape of the open cavity of above-mentioned clamping element is a swallow-tail form.
Aforesaid a kind of air preheater composite seal brush is characterized in that the cross sectional shape in said fixing chamber is a swallow-tail form.
Aforesaid a kind of air preheater composite seal brush; It is characterized in that above-mentioned baffle plate is bent to form three parts: fitting with above-mentioned supporting plate constitutes the sticking part that is fixedly connected, separates the pars intermedia that forms lock chamber with above-mentioned supporting plate, bends upwardly extending stop part by above-mentioned pars intermedia; Above-mentioned supporting plate is bent to form three parts: the fixed part that is used for fixing, being used for fitting with the sticking part of above-mentioned baffle plate constitutes the supporting plate sticking part that is fixedly connected, separates the supporting plate pars intermedia that forms lock chamber with above-mentioned baffle plate.
Aforesaid a kind of air preheater composite seal brush is characterized in that the fixed part of above-mentioned supporting plate is provided with the mounting hole that is used to install.
Aforesaid a kind of air preheater composite seal brush is characterized in that above-mentioned sticking part and supporting plate sticking part form a fixed connection through welding, and above-mentioned clamping element adopts welding to constitute with above-mentioned supporting plate and baffle plate and is fixedly connected.
The usefulness of the utility model is: the utility model can adopt die mould technology to form, and formed precision is higher, and its bending structure cleverly makes that welding is not yielding, and it is also comparatively convenient to assemble, and can improve productive rate greatly; And existing bolt clamping structure has been saved materials such as bolt and nut, has cancelled punching operation and clamping operation various and that required precision is higher; Moreover, add the pair of lamina flexible sheets in the middle of the brush tow, increase the resilience of brush silk, improve its sealing property; Filling adhesive between the slight void between clamping element, brush silk and the flexible sheets, bonding makes that with the double action that clamps brush silk stiff end is more firm, avoids the brush silk to be in operation and is drawn out of; Support chip is strengthened brush silk sealing effectiveness, increases the resilience of brush silk, and its free end Passivation Treatment will protect brush silk free end not impaired; In a word, the utility model has improved sealing property and reliability greatly, can replace existing diaphragm seal and Installation and Debugging convenient fully.
Description of drawings
Fig. 1 is the sectional structure sketch map of side of a preferred embodiment of a kind of air preheater composite seal brush of the utility model;
Fig. 2 is the sectional structure sketch map of brush bar among Fig. 1.
The implication of Reference numeral among the figure:
The 1-heart yearn, the 2-flexible sheets, 3-brushes tow, 4-adhesive, 5-clamping element, 6-support chip, 7-supporting plate, 8-baffle plate, 9-air preheater fanning strip, 10-holder, 11-pad, 12-bolt, 13-nut.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.Following examples only are used for more clearly explaining the technical scheme of the utility model, and can not limit the protection domain of the utility model with this.
With reference to Fig. 1, a kind of air preheater composite seal brush of the utility model mainly comprises: supporting plate 7, baffle plate 8 and brush bar, the part of supporting plate 7 and baffle plate 8 is fitted to constitute and is fixedly connected, and in they applying separation place, forms lock chamber and is used for clamping brush bar.The outermost clamping element 5 of brush bar is fixedly connected with supporting plate 7 formations with the baffle plate 8 that constitutes lock chamber; The root of support chip 6 is fixed between clamping element 5 and the supporting plate 7, and its free end is protruding.As preferably, the cross sectional shape of lock chamber is a swallow-tail form.
The brush bar comprises: clamping element 5, brush tow 3, flexible sheets 2, heart yearn 1.With reference to Fig. 2; Brush bar penetralia is a heart yearn 1; The root of flexible sheets 2 wraps up heart yearn 1; The root of brush tow 3 is wrapped in the periphery of flexible sheets 2 roots, and heart yearn 1 all is fixed in the open cavity of clamping element 5 formation with the root of flexible sheets 2, brush tow 3, the open cavity that the free end of flexible sheets 2, brush tow 3 stretches out clamping element 5.
As a kind of preferred version, the free end of flexible sheets 2 should as Fig. 1, shown in Figure 2, in order not contact with air preheater fanning strip 9, disappearance is in brush tow 3.
The part of the open cavity of stretching out clamping element 5 of flexible sheets 2, brush tow 3 is between support chip 6 and baffle plate 8.As a kind of preferred version, the free end of support chip 6 is through Passivation Treatment.Support chip 6 can be strengthened the rebound performance of brush silk, and the free end of passivation simultaneously makes brush silk free end be protected again.
At the brush bar when assembling, can put into the integral body that heart yearn 1, flexible sheets 2, brush tow 3 constitute in the open cavity of clamping element 5 after, carry out die mould technology, clamping element 5 is clamped, their are constituted are fixedly connected.As a kind of preferred version, for make fixing more firmly and strengthen the rebound performance of brush tow 3, between clamping element 5 inwalls and brush tow 3 roots, brush the adhesive glue that is filled with between tow 3 roots and flexible sheets 2 roots.Adding man-hour, elder generation at clamping element 5 inwalls, carries out die mould technology with the adhesive glue brushing then.
As a kind of preferred version, in order to guarantee the fixing steadiness of 5 pairs of brushes of clamping element bar, the cross sectional shape of the open cavity of clamping element 5 is a swallow-tail form.
As a kind of preferred version, as shown in Figure 2, flexible sheets 2 is carried out doubling after walking around heart yearn 1, and the part of doubling forms the double-decker of fitting; Brush tow 3 is a periphery of walking around flexible sheets 2 with a branch of brush silk earlier, doubling then, and two parts lay respectively at flexible sheets 2 double-deck both sides, and the two ends of this a branch of brush silk are as free end of brushing tow 3.The diameter of brush tow 3 brush silks is at 0.05-2.00mm, and the thickness of brush tow 3 is at 1-10mm, and free end is 20-100mm to the length of root bottom; The diameter of heart yearn 1 is 1-5mm; The wall thickness of clamping element 5 is at 0.5-2.0mm, and clamping element 5 should adopt the good material of welding performance, is fixedly connected because it adopts welding to constitute with supporting plate and baffle plate; Flexible sheets 2 can be at 600 degrees centigrade of materials that still can guarantee favorable elasticity with support chip 6 employings simultaneously, and their thickness is between 0.1-1mm.
As a kind of preferred version, baffle plate 8 is bent to form three parts: fitting with supporting plate 7 constitutes the sticking part that is fixedly connected, separates the pars intermedia that forms lock chamber with supporting plate 7, bends upwardly extending stop part by pars intermedia; Supporting plate 7 is bent to form three parts: the fixed part that is used for fixing, being used for fitting with the sticking part of baffle plate 8 constitutes the supporting plate sticking part that is fixedly connected, separates the supporting plate pars intermedia that forms lock chamber with baffle plate 8.Sticking part and supporting plate sticking part form a fixed connection through welding, and the thickness of supporting plate 7 and baffle plate 8 is between 1-3mm.As shown in Figure 1, the top of baffle plate 8 is higher than the top of supporting plate 7, as preferably, brushes tow 3 and after installation, should exceed baffle plate 8 about 1-15mm with flexible sheets 2, and support chip 6 should exceed 1-5mm than baffle plate 8.
As shown in Figure 1, as a kind of preferred version, the fixed part of supporting plate 7 is provided with the mounting hole that is used to install.Making it can pass through bolt 12, nut 13, pad 11 constitutes with holder 10 and is connected the formation brush seal.
The above only is the preferred implementation of the utility model; Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model know-why, can also make some improvement and remodeling, these improvement and remodeling also should be regarded as the protection domain of the utility model.
Claims (10)
1. an air preheater composite seal is brushed, and comprises that baffle plate, supporting plate is characterized in that, also comprise: brush bar and support chip, and above-mentioned brush bar comprises: clamping element, brush tow, flexible sheets, heart yearn; Above-mentioned baffle plate is fitted to constitute with the part of above-mentioned supporting plate and is fixedly connected; Above-mentioned baffle plate forms the lock chamber that is used for fixing above-mentioned brush bar that opens wide with the place of separation of above-mentioned supporting plate, is positioned at the outermost above-mentioned clamping element of above-mentioned brush bar and is fixedly connected with the supporting plate formation with the baffle plate that constitutes the said fixing chamber; The root of above-mentioned support chip is fixed between above-mentioned clamping element and the supporting plate, and its free end is protruding; The root of above-mentioned flexible sheets is wrapped in the periphery of above-mentioned heart yearn; The root of above-mentioned brush tow is wrapped in the periphery of above-mentioned flexible sheets root; The root of above-mentioned heart yearn and flexible sheets, brush tow is fixed in the open cavity of above-mentioned clamping element; The free end of flexible sheets, brush tow stretches out the open cavity of above-mentioned clamping element and is higher than the top of above-mentioned baffle plate and supporting plate, and the part that above-mentioned flexible sheets and brush tow stretch out above-mentioned clamping element open cavity is between above-mentioned baffle plate and support chip.
2. a kind of air preheater composite seal brush according to claim 1 is characterized in that above-mentioned flexible sheets is walked around above-mentioned heart yearn doubling, forms the double-decker of fitting; Above-mentioned brush tow is for forming through the periphery that doubling is centered around above-mentioned flexible sheets with a branch of brush silk, and the two ends of this a branch of brush silk are as the free end of above-mentioned brush tow.
3. a kind of air preheater composite seal brush according to claim 1 is characterized in that, is filled with adhesive glue between above-mentioned clamping element inwall and the above-mentioned brush tow root, between above-mentioned brush tow root and the above-mentioned flexible sheets root.
4. a kind of air preheater composite seal brush according to claim 1 is characterized in that the free end of above-mentioned support chip is through Passivation Treatment.
5. a kind of air preheater composite seal brush according to claim 1 is characterized in that the free end disappearance of above-mentioned flexible sheets is in above-mentioned brush tow.
6. a kind of air preheater composite seal brush according to claim 1 is characterized in that the cross sectional shape of the open cavity of above-mentioned clamping element is a swallow-tail form.
7. a kind of air preheater composite seal brush according to claim 1 is characterized in that the cross sectional shape in said fixing chamber is a swallow-tail form.
8. according to any described a kind of air preheater composite seal brush of claim 1 to 7; It is characterized in that above-mentioned baffle plate is bent to form three parts: fitting with above-mentioned supporting plate constitutes the sticking part that is fixedly connected, separates the pars intermedia that forms lock chamber with above-mentioned supporting plate, bends upwardly extending stop part by above-mentioned pars intermedia; Above-mentioned supporting plate is bent to form three parts: the fixed part that is used for fixing, being used for fitting with the sticking part of above-mentioned baffle plate constitutes the supporting plate sticking part that is fixedly connected, separates the supporting plate pars intermedia that forms lock chamber with above-mentioned baffle plate.
9. a kind of air preheater composite seal brush according to claim 8 is characterized in that the fixed part of above-mentioned supporting plate is provided with the mounting hole that is used to install.
10. a kind of air preheater composite seal brush according to claim 9 is characterized in that above-mentioned sticking part and supporting plate sticking part form a fixed connection through welding, and above-mentioned clamping element adopts welding to constitute with above-mentioned supporting plate and baffle plate and is fixedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203969358U CN202303435U (en) | 2011-10-18 | 2011-10-18 | Compound-type sealing brush for air pre-heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203969358U CN202303435U (en) | 2011-10-18 | 2011-10-18 | Compound-type sealing brush for air pre-heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202303435U true CN202303435U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203969358U Withdrawn - After Issue CN202303435U (en) | 2011-10-18 | 2011-10-18 | Compound-type sealing brush for air pre-heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202303435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410555A (en) * | 2011-10-18 | 2012-04-11 | 江苏透平密封高科技有限公司 | Composite sealing brush for air preheater |
-
2011
- 2011-10-18 CN CN2011203969358U patent/CN202303435U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410555A (en) * | 2011-10-18 | 2012-04-11 | 江苏透平密封高科技有限公司 | Composite sealing brush for air preheater |
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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: 20120704 Effective date of abandoning: 20130710 |
|
| RGAV | Abandon patent right to avoid regrant |