CN203091044U - Millstone shaft sealing device of coal mill - Google Patents
Millstone shaft sealing device of coal mill Download PDFInfo
- Publication number
- CN203091044U CN203091044U CN 201220738636 CN201220738636U CN203091044U CN 203091044 U CN203091044 U CN 203091044U CN 201220738636 CN201220738636 CN 201220738636 CN 201220738636 U CN201220738636 U CN 201220738636U CN 203091044 U CN203091044 U CN 203091044U
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- modular
- ring
- carbon
- protective cover
- sealing
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Abstract
The utility model discloses a millstone shaft sealing device of a coal mill. The millstone shaft sealing device comprises a modular support plate, a modular flange, a modular sealing ring, modular carbon crystal rings, a modular internal protective cover and a modular external protective cover, wherein the modular support plate is fixedly connected with a lower frame body of the coal mill, the modular flange is fixedly connected with the modular support plate, the modular sealing ring and the modular flange are coaxially fixedly arranged below the modular support plate, a plurality of ring grooves used for embedding the modular carbon crystal rings are formed in the inner side surface of the modular sealing ring, the modular internal protective cover and the modular flange are coaxially fixedly arranged above the modular flange, the modular external protective cover is fixedly connected with a millstone, and the modular external protective cover and the modular internal protective cover are coaxially arranged at the outer side of the millstone and are in tight contact. According to the millstone shaft sealing device, a modular carbon sealing technology of the medium-speed coal mill changes a conventional sealing process, and is greatly improved in coal milling capacity and effect of the coal mill.
Description
Technical field
The utility model relates to field of mechanical technique, particularly relates to a kind of mill spindle sealing device of coal pulverizer.
Background technology
Coal pulverizer is with coal crusher and wears into the machinery of coal dust that it is the important auxiliary equipment of coal-powder boiler.The coal-grinding process is that coal is broken and the ever-increasing process of surface area.Increase new surface area, must overcome the intermolecular adhesion of solid, thereby need consumed energy.Coal by being ground into coal dust, mainly is by crushing, smashes and grind three kinds of modes and carry out in coal pulverizer.
The pattern of coal pulverizer is a lot, can be divided into three types by the rotating speed of coal-grinding workpiece, promptly low speed coal mill, medium-speed pulverizer and high speed coal mill.The medium-speed pulverizer rotating speed is 50～300 rev/mins, and kind is more.Common have square position mill, bowl shaped mill, E type grind and roller mill.Their common feature is that the parts of milling are made of the body of milling of two groups of relative motions.Coal cinder is milled at these two groups and is squeezed between the surface, mills and pulverized.Simultaneously, the hot blast that feeds coal pulverizer is dried coal, and coal dust is delivered in the separator on the top, district of milling.After separating, the coal dust of certain particle size is taken out of outside the mill with air-flow, and coarse grained coal dust returns the district that mills and refaces.Medium-speed pulverizer has facility compact, it is little to take up an area of, power consumption is economized remarkable advantages such as (be about low speed coal mill 50～75%), noise are little, the lighter sensitivity of operation control ratio.
It is stationary state that present medium-speed pulverizer adopts the metal labyrinth seal, and the experience wear post gap increases, and does not have and falls regulatory function voluntarily after rise, can't adjust, and does not reach thorough sealing effectiveness, even " flooding the mill phenomenon " can take place.Simultaneously because existing design is the little matched in clearance between mill protective cover and the mill, because of its gap is positioned at the top of scraping plate mechanism, deslagging can't enter protective cover inside.But " flooding the mill phenomenon " takes place in the mill in case coal pulverizer is blocked, and a general mood chamber coal dust content increase will enter air compartment inside with a wind, causes huge damage.And old-fashioned sealing ring is an integral body, and change needs to shut down and reductor is pulled out, and pulls down a plurality of bolts, tears open greatly greatly and unloads, and work danger and workload are big, and the manpower of use is also many, has increased use cost.
The utility model content
The purpose of this utility model is at the technological deficiency that exists in the prior art, and a kind of shaft sealer of coal pulverizer is provided.
For realizing that the technical scheme that the purpose of this utility model adopted is:
A kind of mill spindle sealing device of coal pulverizer, comprise the modular gripper shoe, the modular flange, the modular sealing ring, the brilliant ring of modular carbon, protective cover and modular outer protective cover in the modular, wherein, described modular gripper shoe is fixedlyed connected with the coal pulverizer lower frame, described modular flange is fixedlyed connected with the modular gripper shoe, described modular sealing ring and modular flange fixedly install thereunder coaxially, described modular sealing ring medial surface is formed with a plurality of in order to be embedded the ring groove of the brilliant ring of modular carbon, protective cover is fixedly installed on modular flange top coaxially with the modular flange in the described modular, described modular outer protective cover fixedly connected with mill and with modular in protective cover is coaxial is arranged on outside it and both keep sealing and contact.
Be formed with sealing general mood chamber in the described modular sealing ring between top annular groove and the below annular groove, described sealing general mood chamber is connected to utilize pressurized seal with outside blower fan.
The brilliant ring of described carbon outer peripheral edges are formed with spring groove, and the spring that ring week is provided with and is embedded in spring groove forces the brilliant ring of carbon to clamp mill.
The contact-making surfaces of the two adjacent brilliant ring of carbon lobes are the inclined-plane in the brilliant ring of described modular carbon, and described inclined-plane makes side contacts in the two adjacent brilliant ring of the carbon lobes and the outside keeps at interval.
Having only the contact-making surface of the two brilliant ring of adjacent carbon lobes in the brilliant ring of described modular carbon is the inclined-plane.
The angle of the brilliant ring body tangent line of described inclined-plane and carbon is at 25-30 °.
Described modular sealing ring, the modular flange, the modular gripper shoe, protective cover and modular outer protective cover are divided into 6 lobes respectively in the modular, wherein connect by bolt and welding double fixed between adjacent two lobes of protective cover in modular sealing ring, the modular with the modular outer protective cover, the modular flange is fixedly connected by welding between adjacent two lobes of modular gripper shoe.
The brilliant ring of described carbon has 4 circles, between the brilliant ring of carbon above described sealing general mood chamber is formed in the sealing ring and the brilliant ring of three carbon of below.
Also be provided with labyrinth seal structure on the inner sealing surface of the modular sealing ring of bottom, described sealing general mood chamber, the both sides up and down of its position brilliant ring of three circle carbon in the bottom.
The protective cover upper end outside is formed with the inner seal ring that twice at least are provided with at interval in described, be formed with the outer seal ring that twice at least are provided with at interval accordingly in inboard, described outer protective cover lower end, described in the mutual embedding of outer seal ring be provided with the refractory seals bar between outer seal ring in being incorporated in.
Compared with prior art, the beneficial effects of the utility model are:
Medium-speed pulverizer modular carbon Sealing Technology of the present utility model, changed traditional sealing technology, improve coal pulverizer coal-grinding disposal ability and effect greatly, realize targets such as energy-saving and emission-reduction, high-efficiency environment friendly, reduction investment, remedy the technological deficiency of domestic power industry coal-grinding processing aspect, electric power and the processing of other industry coal-grinding there are stronger exemplary role, have dissemination.After equipment put into operation, overall operation was stable, and sealing effectiveness is better than traditional sealing device, had realized processing efficient, energy-saving and environmental protection.And the renewal cost reduction, operating expenses and Master Cost all descend to some extent.
Description of drawings
Figure 1 shows that structural representation of the present utility model;
Figure 2 shows that the brilliant ring sealing of modular carbon schematic diagram;
Figure 3 shows that the brilliant ring structure schematic diagram of carbon of the present utility model.
Among the figure: 1. mill, 2. protective cover in the modular, 3. lower frame, 4. modular sealing ring, the 5. brilliant ring of modular carbon, 6. modular gripper shoe, 7. modular flange, 8. modular outer protective cover, 9. spring, 10. sealing general mood chamber, 20. mill spindle, 21. inner seal rings, 81. outer seal rings, 51. inclined-planes.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As illustrated in fig. 1 and 2, the mill spindle sealing device of coal pulverizer of the present utility model, comprise lower frame 3, tubular modular gripper shoe 6, modular flange 7, modular sealing ring 4, the brilliant ring 5 of modular carbon, protective cover 2 and modular outer protective cover 8 in the modular, wherein, described modular flange 7 is fixedlyed connected with lower frame 3 by modular gripper shoe 6, described modular sealing ring 4 fixedly installs thereunder coaxially with modular flange 7, described modular sealing ring 4 medial surfaces are formed with 4 in order to be embedded the ring groove of the brilliant ring 5 of modular carbon, protective cover 2 is fixedly installed on modular flange 7 tops coaxially with modular flange 7 in the described modular, described modular outer protective cover 8 and mill 1 fixedly connected and with modular in protective cover 2 is coaxial is arranged on its outside and both and keeps sealing and contact.Each assembly is set to modular, utilizes the CONTACT WITH FRICTION of the mill spindle 20 of modular carbon crystalline substance ring and mill 1 to realize the movable sealing effect, and each assembly module formula is designed the simple of feasible installation and removal change.Specifically, the modular seal reconstruction makes original large volume, and the heavy quantitative change is for small size, and lightweight need not to pull out reductor, need not tear open greatly greatly and unload, and has reduced manpower, only needs to change the brilliant ring of modular carbon, has shortened the replacing time greatly.So-called modular just is meant original large-scale volume become modular, changes greatly for a short time, and it heavily be light changing, abbreviation.
Wherein, described modular sealing ring, the modular flange, the modular gripper shoe, protective cover and modular outer protective cover are divided into 6 lobes respectively in the modular, connect by bolt and welding double fixed between adjacent two lobes of protective cover and modular outer protective cover in modular sealing ring, the modular, the modular flange is fixedly connected by welding between adjacent two lobes of modular gripper shoe.Simultaneously, in the middle of the every lobe flange gap is arranged all, the interior protective cover that can be used for adjusting the flange top when mounted is concentric.
For improving the sealing effectiveness at mill spindle 20 places, be formed with sealing general mood chamber 10 between the inner and upper of described modular sealing ring and the lower grooves, described sealing general mood chamber is connected to utilize pressurized seal with outside blower fan.The brilliant ring of described carbon has 4 circles, three-layer sealed ring is arranged below the brilliant sealing ring mode of the modular carbon of three-plus-one, and resistance increases, and sealing wind could make progress away and play the effect of sealing.Further, on the inner sealing surface of the modular sealing ring of bottom, described sealing general mood chamber, also be provided with labyrinth seal structure, utilize labyrinth seal structure can contain further that gas and dust leak outside.That is, axle sealing structure of the present utility model has reduced the volume of sealing general mood chamber, reduces the outer discharge of sealing wind and has improved the seal ring seal performance, and it is reliable and stable that it is accomplished; Increase the service life, easy to maintenance, improve the coal pulverizer percentage reserve, realized that the power transmission shaft floating seal no longer leaks out, leaks powder, the requirement of reach safely, carrying out production strictly in line with rules and regulations.Be that novel plug formula carbon sealing means has reduced sealing wind to greatest extent and leaks, limited a wind enter in protective cover inside.Sealing nothing in coal pulverizer bottom leaks outside, and can improve sealing wind and a leeway, the requirement of satisfying safety and carrying out production strictly in line with rules and regulations.
The brilliant ring of described modular carbon is 18 lobes of five equilibrium, and the brilliant ring of described carbon outer peripheral edges are formed with spring groove, and the spring 9 that ring week is provided with and is embedded in spring groove forces the brilliant ring of carbon to clamp mill spindle.Carbon crystalline substance ring is adopted modular organization and adopts fastening spring, after carbon crystalline substance ring medial surface is worn, can guarantee the sealing effectiveness of brilliant ring of carbon and axle equally, and convenient easy access, replacing are installed by the clamping of spring.The assurance of hermetically-sealed construction life-span was not less than 10 years.Further, as shown in Figure 3, for guarantee after the wearing and tearing of the brilliant ring of modular carbon medial surface, still to keep with guarantee when mill spindle contact each carbon brilliant encircle between lobe very close to each other, the contact-making surfaces that have two adjacent carbon crystalline substances to encircle lobe in the brilliant ring of described modular carbon are to make side contacts in the brilliant ring of the carbon lobe and the inclined-plane 51 at maintenance interval, the outside, preferably, only on the brilliant ring of two blocks of carbon lobe contact-making surface, the inclined-plane is set.Specifically, the inclined-plane 51 that promptly cuts a square ring body and form in the end outside of the brilliant ring of carbon lobe, form a vee in the outside of the brilliant ring of carbon during two the brilliant ring of the carbon with inclined-plane lobe contacts, can making of vee closely contacts and mill spindle held tightly between the brilliant ring of each carbon lobe when installing, when wearing and tearing take place, under the pressure and vee acting in conjunction of spring 9, the brilliant ring of carbon keeps when can continue to hold mill spindle tightly contacting between the brilliant ring of each carbon lobe, effectively guarantees the steadiness of the brilliant ring of each carbon lobe when preventing to reveal.Wherein, the tangent line angle at described inclined-plane and itself and inner ring surface intersection point place is at 25-30 °.
Further, for guaranteeing the seal between outer protective cover and interior protective cover, the outside, protective cover upper end is formed with the inner seal ring 21 that twice are provided with at interval in described, be formed with the outer seal ring 81 that twice are provided with at interval in inboard, described outer protective cover lower end accordingly, the mutual embedding of interior outer seal ring is incorporated in and the refractory seals bar is set with the lift-off seal effect between sealing ring.That is, the sealing of F shape is set between interior outer protective cover, promotes this place's sealing effectiveness, prevent the dust leakage by circuitous path and refractory seals bar.
Medium-speed pulverizer modular carbon Sealing Technology of the present utility model, changed traditional sealing technology, improve coal pulverizer coal-grinding disposal ability and effect greatly, realize targets such as energy-saving and emission-reduction, high-efficiency environment friendly, reduction investment, remedy the technological deficiency of domestic power industry coal-grinding processing aspect, electric power and the processing of other industry coal-grinding there are stronger exemplary role, have dissemination.After equipment put into operation, overall operation was stable, and sealing effectiveness is better than traditional sealing device, had realized processing efficient, energy-saving and environmental protection.And the renewal cost reduction, operating expenses and Master Cost all descend to some extent.
The above only is a preferred implementation of the present utility model; should be noted that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. the mill spindle sealing device of a coal pulverizer, it is characterized in that, comprise the modular gripper shoe, the modular flange, the modular sealing ring, the brilliant ring of modular carbon, protective cover and modular outer protective cover in the modular, wherein, described modular gripper shoe is fixedlyed connected with the coal pulverizer lower frame, described modular flange is fixedlyed connected with the modular gripper shoe, described modular sealing ring and modular flange fixedly install thereunder coaxially, described modular sealing ring medial surface is formed with a plurality of in order to be embedded the ring groove of the brilliant ring of modular carbon, protective cover is fixedly installed on modular flange top coaxially with the modular flange in the described modular, described modular outer protective cover fixedly connected with mill and with modular in protective cover is coaxial is arranged on outside it and both keep sealing and contact.
2. the mill spindle sealing device of coal pulverizer as claimed in claim 1, it is characterized in that, be formed with sealing general mood chamber in the described modular sealing ring between top annular groove and the below annular groove, described sealing general mood chamber is connected to utilize pressurized seal with outside blower fan.
3. the mill spindle sealing device of coal pulverizer as claimed in claim 1 or 2 is characterized in that, the brilliant ring of described carbon outer peripheral edges are formed with spring groove, and the spring that ring week is provided with and is embedded in spring groove forces the brilliant ring of carbon to clamp mill.
4. the mill spindle sealing device of coal pulverizer as claimed in claim 3 is characterized in that, the contact-making surfaces of the two adjacent brilliant ring of carbon lobes are the inclined-plane in the brilliant ring of described modular carbon, and described inclined-plane makes side contacts in the two adjacent brilliant ring of the carbon lobes and the outside keeps at interval.
5. the mill spindle sealing device of coal pulverizer as claimed in claim 4 is characterized in that, having only the contact-making surface of the two brilliant ring of adjacent carbon lobes in the brilliant ring of described modular carbon is the inclined-plane.
6. the mill spindle sealing device of coal pulverizer as claimed in claim 5 is characterized in that, the angle of the brilliant ring body tangent line of described inclined-plane and carbon is at 25-30 °.
7. the mill spindle sealing device of coal pulverizer as claimed in claim 3, it is characterized in that, described modular sealing ring, the modular flange, protective cover and modular outer protective cover are divided into 6 lobes respectively in the modular gripper shoe, modular, wherein connect by bolt and welding double fixed between adjacent two lobes with the modular outer protective cover of protective cover in modular sealing ring, the modular, the modular flange is fixedly connected by welding between adjacent two lobes of modular gripper shoe.
8. the mill spindle sealing device of coal pulverizer as claimed in claim 2 is characterized in that, the brilliant ring of described carbon has 4 circles, between the brilliant ring of carbon above described sealing general mood chamber is formed in the sealing ring and the brilliant ring of three carbon of below.
9. the mill spindle sealing device of coal pulverizer as claimed in claim 8 is characterized in that, also is provided with labyrinth seal structure on the inner sealing surface of the modular sealing ring of bottom, described sealing general mood chamber, the both sides up and down of its position brilliant ring of three circle carbon in the bottom.
10. the mill spindle sealing device of coal pulverizer as claimed in claim 1, it is characterized in that, the protective cover upper end outside is formed with the inner seal ring that twice at least are provided with at interval in described, be formed with the outer seal ring that twice at least are provided with at interval accordingly in inboard, described outer protective cover lower end, described in the mutual embedding of outer seal ring be provided with the refractory seals bar between outer seal ring in being incorporated in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220738636 CN203091044U (en) | 2012-12-27 | 2012-12-27 | Millstone shaft sealing device of coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220738636 CN203091044U (en) | 2012-12-27 | 2012-12-27 | Millstone shaft sealing device of coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203091044U true CN203091044U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220738636 Withdrawn - After Issue CN203091044U (en) | 2012-12-27 | 2012-12-27 | Millstone shaft sealing device of coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203091044U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989569A (en) * | 2012-12-27 | 2013-03-27 | 天津鹰麟节能科技发展有限公司 | Millstone shaft sealing device of coal mill |
| CN108662579A (en) * | 2018-04-19 | 2018-10-16 | 东方电气集团东方锅炉股份有限公司 | The structure for preventing turbulent burner coal dust from revealing |
| CN111623122A (en) * | 2020-06-17 | 2020-09-04 | 中国电建集团长春发电设备有限公司 | Sealing ring between lower frame body and grinding disc of medium-speed coal mill |
-
2012
- 2012-12-27 CN CN 201220738636 patent/CN203091044U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989569A (en) * | 2012-12-27 | 2013-03-27 | 天津鹰麟节能科技发展有限公司 | Millstone shaft sealing device of coal mill |
| CN102989569B (en) * | 2012-12-27 | 2015-01-14 | 天津鹰麟节能科技发展有限公司 | Millstone shaft sealing device of coal mill |
| CN108662579A (en) * | 2018-04-19 | 2018-10-16 | 东方电气集团东方锅炉股份有限公司 | The structure for preventing turbulent burner coal dust from revealing |
| CN111623122A (en) * | 2020-06-17 | 2020-09-04 | 中国电建集团长春发电设备有限公司 | Sealing ring between lower frame body and grinding disc of medium-speed coal mill |
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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: 20130731 Effective date of abandoning: 20150114 |
|
| RGAV | Abandon patent right to avoid regrant |