CN102989569B - Millstone shaft sealing device of coal mill - Google Patents
Millstone shaft sealing device of coal mill Download PDFInfo
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- CN102989569B CN102989569B CN201210581861.4A CN201210581861A CN102989569B CN 102989569 B CN102989569 B CN 102989569B CN 201210581861 A CN201210581861 A CN 201210581861A CN 102989569 B CN102989569 B CN 102989569B
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Abstract
The invention discloses a millstone shaft sealing device of a coal mill. The millstone shaft sealing device of the coal mill comprises modular supporting plates, modular flanges, modular sealing rings, modular carbon crystal rings, modular inner protective covers and modular outer protective covers. The modular supporting plates are fixedly connected with a lower frame of the coal mill, the modular flanges are fixedly connected with the modular supporting plates, the modular sealing rings and the modular flanges are coaxially and fixedly arranged below the modular flanges, a plurality of ring grooves for embedding the modular carbon crystal rings are formed on the inner side faces of the modular sealing rings, the modular inner protective covers and the modular flanges are coaxially and fixedly arranged above the modular flanges, the modular outer protective covers are fixedly connected with a millstone, and the modular outer protective covers and the modular inner protective covers are coaxially arranged on the outer sides of the modular outer protective covers and contacted in sealing mode. The medium-speed coal mill modular carbon sealing technology in the millstone shaft sealing device of the coal mill changes a traditional sealing process and greatly improves coal grinding processing capacity and effect of the coal mill.
Description
Technical field
The present invention relates to field of mechanical technique, particularly relate to a kind of mill spindle sealing device of coal pulverizer.
Background technology
Coal pulverizer is by coal crusher and wears into the machinery of coal dust, and it is the important auxiliary equipment of coal-powder boiler.Coal-grinding process is that coal is broken and the ever-increasing process of surface area.Increase new surface area, the adhesion between molecular solids must be overcome, thus need consumed energy.Coal is ground into coal dust in coal pulverizer, mainly by crushing, smashing and grind three kinds of modes and carry out.
The pattern of coal pulverizer is a lot, can be divided into three types, i.e. low-speed coal mill, medium-speed pulverizer and high speed coal mill by the rotating speed of coal-grinding workpiece.Medium-speed pulverizer rotating speed is 50 ~ 300 revs/min, and kind is more.Common are square position mill, bowl shaped mill, E type mill and roller mill.Their common feature is that parts of milling are made up of the milling body of two groups of relative motions.Coal cinder is squeezed, mills and is pulverized between these two groups of milling body surfaces.Meanwhile, coal is dried by the hot blast passing into coal pulverizer, and is delivered to by coal dust and mill in the separator on top, district.After being separated, the coal dust of certain particle size is taken out of outside mill with air-flow, and coarse grained coal dust returns to the district that mills and refaces.Medium-speed pulverizer has facility compact, it is little to take up an area, power consumption economize (being about 50 ~ 75% of low speed coal mill), noise little, run and control the lighter remarkable advantage such as sensitive.
Present medium-speed pulverizer adopts metal labyrinth seal to be stationary state, and experience wear post gap increases, and without falling regulatory function after rise voluntarily, cannot adjust, not reach thorough sealing effectiveness, even can occur " flooding mill phenomenon ".Simultaneously because existing design is that mill protective cover coordinates with the small―gap suture between mill, because its gap is positioned at the top of scraping plate mechanism, deslagging cannot enter protective cover inside.But the mill once coal pulverizer is blocked, occur " flooding mill phenomenon ", the increase of First air air chamber coal dust content will enter air compartment inside with First air, causes huge damage.And old-fashioned sealing ring is an entirety, changes and need to shut down and pulled out by reductor, pull down multiple bolt, tear open greatly and unload greatly, work is dangerous and workload is large, and the manpower of use is also many, adds use cost.
Summary of the invention
The object of the invention is the technological deficiency for existing in prior art, and a kind of shaft sealer of coal pulverizer is provided.
The technical scheme adopted for realizing object of the present invention is:
A kind of mill spindle sealing device of coal pulverizer, comprise modular support plate, modular flange, modular seal ring, the brilliant ring of modular carbon, protective cover and modular outer protective cover in modular, wherein, described modular support plate is fixedly connected with coal pulverizer lower frame, described modular flange is fixedly connected with modular support plate, be fixedly installed thereunder described modular seal ring and modular flange coaxial, described modular seal ring medial surface is formed with a plurality of ring groove in order to be embedded the brilliant ring of modular carbon, be fixedly installed on above modular flange in described modular protective cover and modular flange coaxial, described modular outer protective cover is fixedly connected with mill and is coaxially arranged on outside it with protective cover in modular and both keep sealing and contact.
Be formed with sealing air air chamber between upper annular groove and lower endless groove in described modular seal ring, described sealing air air chamber is connected to utilize pressurized seal with outer fan.
The brilliant ring outer peripheral edge of described carbon is formed with spring groove, arranges in ring week and the spring be embedded in spring groove forces the brilliant ring of carbon to clamp mill.
In the brilliant ring of described modular carbon, the contact surface of two adjacent brilliant ring lobes of carbon is inclined-plane, and described inclined-plane makes two adjacent brilliant ring lobe interior side contacts of carbon and maintenance interval, outside.
The contact surface only having two pieces of adjacent brilliant ring lobes of carbon in the brilliant ring of described modular carbon is inclined-plane.
The angle of described inclined-plane and the brilliant ring body tangent line of carbon is at 25-30 °.
Described modular seal ring, modular flange, modular support plate, in modular, protective cover and modular outer protective cover are divided into 6 lobes formations respectively, wherein in modular seal ring, modular between protective cover two lobes adjacent with modular outer protective cover by bolt and weld dual being fixedly connected with, modular flange, is fixedly connected by welding between adjacent two lobes of modular support plate.
The brilliant ring of described carbon has 4 circles, and described sealing air air chamber is formed between the brilliant ring of carbon of top in sealing ring and the brilliant ring of three carbon of below.
The inner sealing surface of the modular seal ring of described sealing air air chamber bottom is also provided with labyrinth seal structure, and the both sides up and down of the brilliant ring of carbon are enclosed in its position in bottom three.
The spaced inner seal ring of at least twice is formed with in described outside protective cover upper end, be formed with the spaced outer seal ring of at least twice at described outer protective cover lower end inside accordingly, described interior outer seal ring reciprocal chimeric is also provided with refractory seals bar between interior outer seal ring.
Compared with prior art, the invention has the beneficial effects as follows:
Medium-speed pulverizer modular carbon Sealing Technology of the present invention, change traditional sealing technology, greatly improve coal pulverizer coal-grinding disposal ability and effect, realize the targets such as energy-saving and emission-reduction, high-efficiency environment friendly, reduction investment, make up the technological deficiency of domestic electrical industry coal-grinding process aspect, there is stronger exemplary role to electric power and the process of other industry coal-grinding, have dissemination.After putting equipment in service, overall operation is stablized, and sealing effectiveness is better than traditional sealing device, achieves process that is efficient, energy-saving and environmental protection.And renewal cost reduces, operating expenses and Master Cost decline all to some extent.
Accompanying drawing explanation
Figure 1 shows that structural representation of the present invention;
Figure 2 shows that modular carbon brilliant ring sealing schematic diagram;
Figure 3 shows that the brilliant ring structure schematic diagram of carbon of the present invention.
In figure: 1. mill, 2. protective cover in modular, 3. lower frame, 4. modular seal ring, the 5. brilliant ring of modular carbon, 6. modular support plate, 7. modular flange, 8. modular outer protective cover, 9. spring, 10. sealing air air chamber, 20. mill spindles, 21. inner seal rings, 81. outer seal rings, 51. inclined-planes.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As illustrated in fig. 1 and 2, the mill spindle sealing device of coal pulverizer of the present invention, comprise lower frame 3, tubular modular support plate 6, modular flange 7, modular seal ring 4, the brilliant ring 5 of modular carbon, protective cover 2 and modular outer protective cover 8 in modular, wherein, described modular flange 7 is fixedly connected with lower frame 3 by modular support plate 6, described modular seal ring 4 is fixedly installed thereunder coaxially with modular flange 7, described modular seal ring 4 medial surface is formed with 4 in order to be embedded the ring groove of the brilliant ring 5 of modular carbon, in described modular, protective cover 2 and modular flange 7 are fixedly installed on above modular flange 7 coaxially, described modular outer protective cover 8 is fixedly connected with mill 1 and is coaxially arranged on outside it with protective cover in modular 2 and both keep sealing and contact.Each assembly is set to modular, utilizes the CONTACT WITH FRICTION of the mill spindle 20 of the brilliant ring of modular carbon and mill 1 to realize movable sealing effect, each assembly module formula design is made to mount and dismount the simple of change.Specifically, modular seal transformation makes original large volume, and heavy quantitative change is in order to small size, and lightweight, without the need to pulling out reductor, need not tear open greatly and unloading greatly, decreasing manpower, only need change the brilliant ring of modular carbon, substantially reduce replacing construction.So-called modular just refers to and original large-scale volume is become modular, changes greatly little, and it is heavily light for changing, and simplifies.
Wherein, described modular seal ring, modular flange, modular support plate, in modular, protective cover and modular outer protective cover are divided into 6 lobes formations respectively, in modular seal ring, modular between protective cover and adjacent two lobes of modular outer protective cover by bolt and weld dual being fixedly connected with, modular flange, be fixedly connected by welding between adjacent two lobes of modular support plate.Meanwhile, have gap in the middle of every lobe flange, the interior protective cover that can be used for when mounted adjusting above flange is concentric.
For improving the sealing effectiveness at mill spindle 20 place, be formed with sealing air air chamber 10 between the inner upper of described modular seal ring and lower grooves, described sealing air air chamber is connected to utilize pressurized seal with outer fan.The brilliant ring of described carbon has 4 circles, and have three-layer sealed ring below the brilliant sealing ring mode of modular carbon of three-plus-one, resistance increases, and sealing air could upwards walk to play the effect of sealing.Further, the inner sealing surface of the modular seal ring of described sealing air air chamber bottom is also provided with labyrinth seal structure, gas and dust leak outside to utilize labyrinth seal structure to contain further.That is, axle sealing structure of the present invention reduces the volume of sealing air air chamber, reduces the outer discharge of sealing air and improves seal ring seal performance, make it accomplish reliable and stable; Increase the service life, easy to maintenance, improve coal pulverizer percentage reserve, achieve power transmission shaft floating seal and no longer leak out, leak powder, the requirement of reach safely, carrying out production strictly in line with rules and regulations.Namely novel plug formula carbon sealing means decreases sealing air to greatest extent and leaks, and limiting First air, to enter interior protective cover inner.Coal pulverizer sealed bottom, without leaking outside, can improve sealing air and First air pressure reduction, the requirement meeting safety and carry out production strictly in line with rules and regulations.
The brilliant ring of described modular carbon is 18 lobes of decile, and the brilliant ring outer peripheral edge of described carbon is formed with spring groove, arranges in ring week and the spring 9 be embedded in spring groove forces the brilliant ring of carbon to clamp mill spindle.Brilliant for carbon ring is adopted modular organization and adopts fastening spring, after the brilliant ring medial surface of carbon is worn, the sealing effectiveness of the brilliant ring of carbon and axle can be ensured by the clamping of spring equally, and convenient easy access, replacing are installed.Hermetically-sealed construction life ensuring is not less than 10 years.Further, as shown in Figure 3, very close to each other for ensureing between each carbon crystalline substance ring lobe while ensureing still can keep contact with mill spindle after the wearing and tearing of modular carbon brilliant ring medial surface, the contact surface having two adjacent brilliant ring lobes of carbon in the brilliant ring of described modular carbon is the inclined-plane 51 making the brilliant ring lobe interior side contacts of carbon and maintenance interval, outside, preferably, only inclined-plane is set on two blocks of carbon brilliant ring lobe contact surface.Specifically, namely outside one end of the brilliant ring lobe of carbon, a square ring body is cut and the inclined-plane 51 that formed, a vee is formed in the outside of the brilliant ring of carbon during two the bevelled carbon of tool brilliant ring lobe contacts, vee can make to install time each carbon brilliant ring lobe between close contact mill spindle is held tightly, when there being wearing and tearing to occur, under the pressure and vee acting in conjunction of spring 9, keep each carbon brilliant ring lobe Contact while the brilliant ring of carbon can continue to hold mill spindle tightly, while preventing from revealing, effectively ensure the steadiness of the brilliant ring lobe of each carbon.Wherein, the tangent line angle of described inclined-plane and itself and inner ring surface point of intersection is at 25-30 °.
Further, for ensureing the seal between outer protective cover and interior protective cover, the spaced inner seal ring 21 of twice is formed with in described outside protective cover upper end, be formed with the spaced outer seal ring 81 of twice at described outer protective cover lower end inside accordingly, interior outer seal ring reciprocal chimeric also arranges refractory seals bar with 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 by circuitous path and refractory seals bar, prevent dust from revealing.
Medium-speed pulverizer modular carbon Sealing Technology of the present invention, change traditional sealing technology, greatly improve coal pulverizer coal-grinding disposal ability and effect, realize the targets such as energy-saving and emission-reduction, high-efficiency environment friendly, reduction investment, make up the technological deficiency of domestic electrical industry coal-grinding process aspect, there is stronger exemplary role to electric power and the process of other industry coal-grinding, have dissemination.After putting equipment in service, overall operation is stablized, and sealing effectiveness is better than traditional sealing device, achieves process that is efficient, energy-saving and environmental protection.And renewal cost reduces, operating expenses and Master Cost decline all to some extent.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. the mill spindle sealing device of a coal pulverizer, it is characterized in that, comprise modular support plate, modular flange, modular seal ring, the brilliant ring of modular carbon, protective cover and modular outer protective cover in modular, wherein, described modular support plate is fixedly connected with coal pulverizer lower frame, described modular flange is fixedly connected with modular support plate, be fixedly installed on below modular flange described modular seal ring and modular flange coaxial, described modular seal ring medial surface is formed with a plurality of ring groove in order to be embedded the brilliant ring of modular carbon, be fixedly installed on above modular flange in described modular protective cover and modular flange coaxial, described modular outer protective cover is fixedly connected with mill and is coaxially arranged in modular outside protective cover with protective cover in modular and both keep sealing and contact, in modular between protective cover two lobes adjacent with modular outer protective cover by bolt and weld dual being fixedly connected with.
2. the mill spindle sealing device of coal pulverizer as claimed in claim 1, it is characterized in that, be formed with sealing air air chamber between upper annular groove and lower endless groove in described modular seal ring, described sealing air air chamber is connected to utilize pressurized seal with outer fan.
3. the mill spindle sealing device of coal pulverizer as claimed in claim 1, is characterized in that, the brilliant ring outer peripheral edge of described carbon is formed with spring groove, arranges in ring week and the spring be 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 2, is characterized in that, the brilliant ring outer peripheral edge of described carbon is formed with spring groove, arranges in ring week and the spring be embedded in spring groove forces the brilliant ring of carbon to clamp mill.
5. the mill spindle sealing device of coal pulverizer as claimed in claim 4, is characterized in that, in the brilliant ring of described modular carbon, the contact surface of two adjacent brilliant ring lobes of carbon is inclined-plane, and described inclined-plane makes two adjacent brilliant ring lobe interior side contacts of carbon and maintenance interval, outside.
6. the mill spindle sealing device of coal pulverizer as claimed in claim 5, is characterized in that, the contact surface only having two pieces of adjacent brilliant ring lobes of carbon in the brilliant ring of described modular carbon is inclined-plane.
7. the mill spindle sealing device of coal pulverizer as claimed in claim 6, is characterized in that, the angle of described inclined-plane and the brilliant ring body tangent line of carbon is at 25-30 °.
8. the mill spindle sealing device of coal pulverizer as claimed in claim 4, it is characterized in that, described modular seal ring, modular flange, modular support plate, in modular, protective cover and modular outer protective cover are divided into 6 lobes respectively, wherein between adjacent two lobes of modular seal ring by bolt and weld dual being fixedly connected with, modular flange, is fixedly connected by welding between adjacent two lobes of modular support plate.
9. the mill spindle sealing device of coal pulverizer as claimed in claim 4, is characterized in that, the brilliant ring of described carbon has 4 circles, and described sealing air air chamber is formed between the brilliant ring of carbon of top in sealing ring and the brilliant ring of three carbon of below.
10. the mill spindle sealing device of coal pulverizer as claimed in claim 9, it is characterized in that, the inner sealing surface of the modular seal ring of described sealing air air chamber bottom is also provided with labyrinth seal structure, and the both sides up and down of the brilliant ring of carbon are enclosed in the position of labyrinth seal structure in bottom three.
The mill spindle sealing device of 11. coal pulverizers as claimed in claim 1, it is characterized in that, the spaced inner seal ring of at least twice is formed with in described outside protective cover upper end, be formed with the spaced outer seal ring of at least twice at described outer protective cover lower end inside accordingly, described inner seal ring and outer seal ring reciprocal chimeric are also provided with refractory seals bar between interior outer seal ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210581861.4A CN102989569B (en) | 2012-12-27 | 2012-12-27 | Millstone shaft sealing device of coal mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210581861.4A CN102989569B (en) | 2012-12-27 | 2012-12-27 | Millstone shaft sealing device of coal mill |
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| CN102989569A CN102989569A (en) | 2013-03-27 |
| CN102989569B true CN102989569B (en) | 2015-01-14 |
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| CN201210581861.4A Active CN102989569B (en) | 2012-12-27 | 2012-12-27 | Millstone shaft sealing device of coal mill |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104514887A (en) * | 2014-12-26 | 2015-04-15 | 大连华阳密封股份有限公司 | Carbon ring seal employing LST |
| CN104759322A (en) * | 2015-03-18 | 2015-07-08 | 泰州航宇电碳制品有限公司 | Grinding roller anti-dust apparatus |
| CN105422864B (en) * | 2015-12-30 | 2017-07-04 | 神华集团有限责任公司 | The sealing structure and coal pulverizer of coal pulverizer |
| CN107420547B (en) * | 2017-09-26 | 2023-11-07 | 马鞍山市荣亿密封材料有限责任公司 | High efficiency mill frame seal structure |
| CN113565962A (en) * | 2021-09-07 | 2021-10-29 | 重庆通用工业(集团)有限责任公司 | Spring pressing type sealing set |
| CN114453074B (en) * | 2022-01-24 | 2023-02-03 | 天津国能津能热电有限公司 | Coal pulverizer for clean production |
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