CN204553847U - A kind of seal arrangement of medium-speed pulverizer vane dynamic and static gaps - Google Patents
A kind of seal arrangement of medium-speed pulverizer vane dynamic and static gaps Download PDFInfo
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- CN204553847U CN204553847U CN201520072712.4U CN201520072712U CN204553847U CN 204553847 U CN204553847 U CN 204553847U CN 201520072712 U CN201520072712 U CN 201520072712U CN 204553847 U CN204553847 U CN 204553847U
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- sealing plate
- vane
- dynamic
- static gaps
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Abstract
The utility model discloses the seal arrangement of medium-speed pulverizer vane dynamic and static gaps.The utility model mainly comprise vane dynamic and static gaps sealing plate and sealing plate support device; At existing coal pulverizer vane ingress edge, increase by a circle sealing plate, and fix with support device; Sealing plate controls at about 5 ~ 10mm with the seal clearance of First air chamber interior walls, is not more than vane dynamic and static gaps; For preventing pebble coal and coal grain from piling up on sealing plate, sealing plate with level be 15 ° with top rade.The utility model after increasing, can prevent coal pulverizer dynamic and static gaps inleakage from increasing because of long-time running wearing and tearing at coal pulverizer vane dynamic and static gaps, thus stablizes vane air outlet velocity, avoids stone coal discharge rate and pebble coal calorific value to increase.
Description
Technical field
The utility model belongs to mechanical assembly field, relates to the seal arrangement of medium-speed pulverizer vane dynamic and static gaps.
Background technique
Due to the needs of actual machine structure, between vane edge and coal pulverizer internal face, there is dynamic and static gaps in the rotary wind ring of medium-speed pulverizer.First air is via an air compartment, and a part is upwards blown out by rotary wind ring, holds up the pulverized coal particle that mill bowl edge overflows, and another part First air laterally can be spilt by dynamic and static gaps.Position coal powder density residing for dynamic and static gaps is high, wind speed is large, temperature is high, after medium-speed pulverizer runs a period of time, dynamic and static gaps can increase because of wearing and tearing, the ratio that First air is spilt from dynamic and static gaps increases, reduce rotary wind ring air outlet velocity, the ability of air-flow support coal particle is declined, and this causes the one of the main reasons that coal pulverizer stone coal discharge rate increases and pebble coal calorific value increases.
Stone coal discharge rate increases and pebble coal calorific value increases, and can make pulverizer capacity reduction, Economy variation, stone coal discharge workload increases simultaneously.A large amount of pebble coals flows through vane and mill bowl differential pressure also will be caused to increase, in addition, if stone coal discharge too much and pile up, under the hot environment of a coal pulverizer air compartment, may cause spontaneous combustion for a long time, thus cause device damage.The adjusting method of usual reduction pebble coal amount is improve the primary air flow of coal pulverizer, and this can make the primary air velocity of boiler-burner increase, and to a certain degree affects the normal combustion of coal dust in burner hearth.
Summary of the invention
The purpose of this utility model increases to solve the rotary wind ring dynamic and static gaps related in background technique the problem causing vane air outlet velocity to reduce, the utility model provides a kind of seal arrangement of medium-speed pulverizer vane dynamic and static gaps, can under the prerequisite not affecting coal pulverizer vane mechanical structure, reduce the ratio that First air spills from vane dynamic and static gaps, improve vane air outlet velocity, reduce stone coal discharge.
The utility model solves the technological scheme that its technical problem adopts:
The utility model comprise vane dynamic and static gaps sealing plate and sealing plate support device;
Described sealing plate is fixed on vane entrance outward edge, and simultaneously bottom sealing plate, arrange support device, sealing plate and support device are welded on vane entrance outward edge jointly, in order to increase sealing plate Mechanical Structure Strength.Described sealing plate can rotate together along with mill bowl when coal pulverizer runs, and the seal clearance between sealing plate and First air chamber interior walls controls at about 5 ~ 10mm.
Described seal clearance width is not more than the width of vane dynamic and static gaps.
Described sealing plate is horizontal by a level inclination, and this level inclination is greater than 15 °.
The material of described sealing plate and support device is identical with vane restrictor ring, is Wear Resisting Steel.
Described sealing plate and support device all adopt welding manner to install.
Described sealing plate thickness be more than or equal to 5mm.
Conveniently sealing plate processing and installation, described sealing plate can be divided into multistage, every section in circular arc, be welded as annulus when installing in coal pulverizer, the quantity of segmentation determines with installation conditions by processing.
The beneficial effects of the utility model are as follows:
After coal pulverizer runs a period of time, vane dynamic and static gaps can increase because of wearing and tearing, causes the inleakage at dynamic and static gaps place to increase, reduces vane air outlet velocity.At the main for once wind in the sealing plate place of an air compartment installation, almost do not have the wearing and tearing of coal grain and coal dust, the degree of wear is by the dynamic and static gaps far below vane top.
The utility model after increasing, can prevent coal pulverizer dynamic and static gaps inleakage from increasing because of long-time running wearing and tearing at coal pulverizer vane dynamic and static gaps, thus stablizes vane air outlet velocity, avoids stone coal discharge rate and pebble coal calorific value to increase.
Accompanying drawing explanation
Fig. 1 is HP medium-speed pulverizer structural representation;
Fig. 2 is the partial enlarged drawing at vane place;
Fig. 3 is the partial enlarged drawing at vane place.
In figure, 1, mill bowl; 2, vane outlet; 3, restrictor ring; 4, vane dynamic and static gaps; 5, First air chamber interior walls; 6, vane entrance; 7, support device; 8, sealing plate; 9, seal clearance.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in FIG. 1 to 3, a kind of seal arrangement of medium-speed pulverizer vane dynamic and static gaps, comprise vane dynamic and static gaps sealing plate 8 and sealing plate support device 7.
At vane entrance 6 outward edge that existing coal pulverizer rotates jointly with mill bowl 1, increase by circle sealing plate 8 and a support device 7.
Described sealing plate 8 is fixed on vane entrance 6 edge, and bottom sealing plate 8, arrange support device 7, sealing plate 8 and support device 7 are welded on vane entrance 6 outward edge jointly simultaneously.In order to increase the Mechanical Structure Strength of sealing plate 8.
Described sealing plate 8 can rotate along with mill bowl 1 together when coal pulverizer runs; for ensureing normal mechanical motion; and it is excessive to prevent from leaking out; seal clearance 9 between sealing plate 8 and First air chamber interior walls 5 controls at about 5 ~ 10mm; seal clearance 9 width of the medium speed grinding of different model has certain difference, but is not more than the width of vane dynamic and static gaps 4.
Described sealing plate 8 may have pebble coal when coal pulverizer runs and coal grain is piled up, and for preventing the generation of accumulation situation, sealing plate 8 should have certain level inclination, and level inclination inclination angle should be greater than 15 °.
Described sealing plate 8 adopts the Wear Resisting Steel identical with vane restrictor ring 3 with the material suggestion of supporting structure 7, sealing plate 8 and support device 7 all adopt welding manner to install, for ensureing structural strength, sealing plate 8 thickness should 5mm and more than, the conveniently processing of sealing plate 8 and installation, sealing plate 8 can be divided into multistage, and every section in circular arc, be welded as annulus when installing in coal pulverizer, the quantity of segmentation determines with installation conditions by processing.
Utility model works process is as follows:
After the utility model is implemented, when coal pulverizer runs, seal clearance 9 and dynamic and static gaps 4 form two seals link.After coal pulverizer long-time running, dynamic and static gaps 4 is easily worn and increases, but seal clearance 9 is not easily worn, and can prevent dynamic and static gaps 4 inleakage from increasing, thus stablizes vane and export 2 wind speed, avoids stone coal discharge rate and pebble coal calorific value to increase.
Claims (7)
1. a seal arrangement for medium-speed pulverizer vane dynamic and static gaps, it is characterized in that comprising vane dynamic and static gaps sealing plate and sealing plate support device;
Described sealing plate is fixed on vane ingress edge, simultaneously bottom sealing plate, arranges support device, in order to increase sealing plate Mechanical Structure Strength; Described sealing plate can rotate together along with rotating grinding bowl when coal pulverizer runs, and the seal clearance between sealing plate and First air chamber interior walls controls at 5 ~ 10mm.
2. the seal arrangement of a kind of medium-speed pulverizer vane dynamic and static gaps as claimed in claim 1, is characterized in that described seal clearance width is not more than the width of vane dynamic and static gaps.
3. the seal arrangement of a kind of medium-speed pulverizer vane dynamic and static gaps as claimed in claim 1, it is characterized in that described sealing plate is horizontal by a level inclination, and this level inclination is greater than 15 °.
4. the seal arrangement of a kind of medium-speed pulverizer vane dynamic and static gaps as claimed in claim 1, is characterized in that the material of described sealing plate and support device is identical with vane restrictor ring, is Wear Resisting Steel.
5. the seal arrangement of a kind of medium-speed pulverizer vane dynamic and static gaps as claimed in claim 1, is characterized in that described sealing plate and support device all adopt welding manner to install.
6. the seal arrangement of a kind of medium-speed pulverizer vane dynamic and static gaps as claimed in claim 1, it is characterized in that described sealing plate thickness be more than or equal to 5mm.
7. the seal arrangement of medium-speed pulverizer vane dynamic and static gaps as claimed in claim 1, is characterized in that described sealing plate can be divided into multistage, and every section is circular arc, and be welded as annulus when installing in coal pulverizer, the quantity of segmentation determines with installation conditions by processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520072712.4U CN204553847U (en) | 2015-02-02 | 2015-02-02 | A kind of seal arrangement of medium-speed pulverizer vane dynamic and static gaps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520072712.4U CN204553847U (en) | 2015-02-02 | 2015-02-02 | A kind of seal arrangement of medium-speed pulverizer vane dynamic and static gaps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204553847U true CN204553847U (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520072712.4U Expired - Fee Related CN204553847U (en) | 2015-02-02 | 2015-02-02 | A kind of seal arrangement of medium-speed pulverizer vane dynamic and static gaps |
Country Status (1)
| Country | Link |
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| CN (1) | CN204553847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776224A (en) * | 2015-02-02 | 2015-07-15 | 浙江大学 | Medium-speed coal mill air ring dynamic and static clearance sealing device |
-
2015
- 2015-02-02 CN CN201520072712.4U patent/CN204553847U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776224A (en) * | 2015-02-02 | 2015-07-15 | 浙江大学 | Medium-speed coal mill air ring dynamic and static clearance sealing device |
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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: 20150812 Termination date: 20220202 |