CN201702678U - Medium-speed millstone shaft sealing ring device - Google Patents
Medium-speed millstone shaft sealing ring device Download PDFInfo
- Publication number
- CN201702678U CN201702678U CN2010201402362U CN201020140236U CN201702678U CN 201702678 U CN201702678 U CN 201702678U CN 2010201402362 U CN2010201402362 U CN 2010201402362U CN 201020140236 U CN201020140236 U CN 201020140236U CN 201702678 U CN201702678 U CN 201702678U
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- ring
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- sealing device
- device housing
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Abstract
The utility model relates to a medium-speed millstone shaft sealing ring device, which belongs to sealing devices on electric and cement powder manufacturing equipment. A dustproof cover mounting frame is fixedly connected with a millstone via a first bolt and fixedly connected with a mounting support via a second bolt, a sealing device casing is fixedly connected with a medium-speed mill body via a carrying ring, a through labyrinth sealing ring is fixedly connected with the sealing device casing, a pressure cavity is formed between the through labyrinth sealing ring and a three-channel carbon ring, an inner drain port staggering type labyrinth movable sealing ring is fixedly connected with the dustproof cover mounting frame via a fifth screw, and an inner drain port staggering type fixed sealing ring is fixedly connected with the sealing device casing via a sixth screw. The medium-speed millstone shaft sealing ring device has the advantages of novel structure, prolonged service life of the carbon ring and replacement cycle, and maximum guaranteeing of normal and continuous running of a coal mill.
Description
Technical field
The utility model belongs to the sealing device on electric power, the cement powder manufacturing apparatus.
Background technology
Existing medium-speed pulverizer mill spindle sealing device mainly is made up of parts such as pressure chamber, carbon ring, closed chambers.Carbon dam has four layers, top one deck, and three layers of bottoms are pressure chamber between up and down.Four layers of carbon ring are around each week of mill spindle also evenly being divided into plurality of sections, each layer all uses a ring spring to rein on circumference on the mill power transmission shaft, following three layers of carbon ring do not have the gap with mill and cooperate, and circle is evenly produced some roads gap in the carbon ring of upper strata, and certain flow area is arranged.On pressure chamber, the space that seal holder ring and drive plate surrounded is called closed chamber, and a little matched in clearance is arranged at seal holder ring and mill top, is called interior drain port, and closed chamber is communicated with by interior drain port with an air compartment.For hot blast and the dust that guarantees an air compartment do not leak, pulverized coal preparation system feeds than the big sealing wind of wind pressure to pressure chamber by a relay air blower.
Sealing principle: sealing wind enters behind the pressure chamber can only be from upper strata carbon ring that gap is arranged by entering annular seal space, gap by seal holder ring and mill top enters air compartment one time again, because wind height of pressure ratio of sealing wind, just can realize the mill spindle sealing of grinding machine with hot blast and dust shielding in the closed chamber outside.
Carbon formula mill spindle sealing at present is optimal seal form, because the sealing of this form good sealing effect not only, and can change after the main potted component wearing and tearing.But with regard to existing carbon formula mill spindle sealing ring, also there are many shortcomings:
1, carbon ring does not have circumferential locating piece, can not realize not having clearance automatic compensation
Carbon ring generally is 20 periods of weeks, reins on mill spindle by spring also can rotate with mill.Leave the gap of 1mm at least between two adjacent carbon rings, this gap is a compensate for clearance.Because carbon ring is subjected to the frictional force of direction and mill switched in opposite in carriage, circumferentially there is not locating piece again, under the drive of mill, can occur carbon ring is extruded into together, pile up in the gap between certain two carbon ring simultaneously, mm clearance more than 20 appears, cause the part to leak out seriously, influence the grinding machine sealing.Carbon ring working face wearing and tearing back utilizes compensate for clearance to compensate under the effect of spring, when adjacent two carbon ring sections contact just can not be proceeded compensation, the gap just appears in carbon ring and mill spindle like this, and seal failure appears in a large amount of sealing wind of outwards revealing soon.
2, the fit clearance on closed chamber housing and mill top: interior drain port, easily wearing and tearing and can not change.
One time air compartment is communicated with by interior drain port and closed chamber, is the position of the most critical of sealing herein, is the first line of defence of sealing.Traditional mill spindle sealing ring is not paid attention to herein, has just designed the little matched in clearance in a place, because interior drain port outside is exactly sealed wind powder mixture, the wearing and tearing of interior drain port are very serious.In case the wearing and tearing of interior drain port gap become big, wind powder mixture will creep in the closed chamber to be piled up.The dust of piling up can be scrapped the wearing and tearing of levels carbon ring in a short period of time, and causing to shut down influences ordinary production.
3, can reduce the sealing air quantity that enters closed chamber after the wearing and tearing of upper strata carbon ring working face, drain port sealing in the influence.
It is different with lower floor to talk about the upper strata carbon ring above, and the upper strata sealing ring has several ventilation gap.After working face wearing and tearing, can move radially and reduce the draught area of gap, increase the resistance that sealing wind enters closed chamber at the effect lower edge of spring mill.Because each sealing position of grinding machine communicates, sealing wind can pass through from other relatively little sealing position of resistance.And total sealing air quantity is limited, will cause towards the sealing air quantity of mill spindle sealing ring and reduce, and has weakened the sealability of outer drain port, causes closed chamber dust stratification even grinding machine to reveal.
4, the closed chamber dust stratification can't be cleared up, and destroys sealing
All there is the problem of closed chamber dust stratification in which kind of hermetically-sealed construction, just how many differences of ash amount.Take place under this three total situation that the closed chamber dust stratification generally stops up at grinding machine, the little and outer drain port fit clearance of sealing air quantity is worn and torn.Can carbon ring is stuck if do not clear up timely, make its seal failure.Bulky grain also can squeeze carbon ring broken, thoroughly destroys sealing.
Summary of the invention
The utility model provides a kind of medium-speed pulverizer mill spindle seal ring apparatus, does not have circumferential locating piece to solve the carbon ring that present sealing ring exists, and can not realize not having clearance automatic compensation; The fit clearance on closed chamber housing and mill top, easily wearing and tearing and can not change; Can reduce the sealing air quantity that enters closed chamber after the carbon ring working face wearing and tearing of upper strata, drain port sealing in the influence; The closed chamber dust stratification can't be cleared up, and destroys the problem of sealing.The technical scheme that the utility model is taked is: the dust cover installing rack is fixedlyed connected with mill by bolt one, and dust cover is fixedlyed connected with mounting bracket by bolt two, and the sealing device housing is then fixedlyed connected with the medium-speed pulverizer body by filler ring; The carbon ring carriage is fixed on the sealing device housing by bolt three, limited block is fixedlyed connected with the carbon ring carriage with steady pin, the per pass of three road carbon rings evenly is divided into 18 sections, respectively with a ring spring socket, the straight-through labyrinth ring is fixedlyed connected with the sealing device housing by bolt four, form pressure chamber between straight-through labyrinth ring and three road carbon rings, interior drain port staggered form labyrinth rotary packing ring is fixedlyed connected with the dust cover installing rack with screw five, interior drain port staggered form labyrinth stationary seal ring is fixedlyed connected with the sealing device housing with screw six, protective plate is fixedlyed connected with interior drain port rotary packing ring with bolt seven, the sealing device housing has closed chamber, dust cover, form cushion chamber between protective plate and sealing device housing; Four uniform sealing wind interfaces are fixedlyed connected with pressure chamber, and pressure chamber blows the ash inlet, the pressure chamber ash hole is connected with pressure chamber respectively, and annular seal space blows the ash inlet, the annular seal space ash hole is connected with annular seal space respectively; Dust cover installing rack top has top to adjust pad, has the bottom to adjust pad between sealing device housing and filler ring, and the gusset one of reinforcement is arranged on the dust cover installing rack, and the gusset two of reinforcement is arranged on the dust cover, and the sealing device housing has the gusset three of reinforcement.
Operation principle: enter pressure chamber than the high sealing wind of wind pressure by four uniform sealing wind interfaces,, can block sealing wind and not leak outside because the carbon ring working face of outer drain port bottom contacts with mill.All sealing wind can be by the straight-through labyrinth ring on outer drain port upper strata, because the fit clearance of labyrinth teeth and mill spindle is very little, the moment that enters closed chamber at sealing wind can produce very high wind speed, prevents that wind and dust from entering the carbon ring that weares and teares in the balancing gate pit.Sealing wind continues upwards to flow through the interior drain port of being made up of the staggered form labyrinth seal ring, and dust is blocked in outside the interior drain port.For the Dust Capacity of drain port contact in reducing, the wearing and tearing of drain port in reducing adopt dust cover and protective plate that interior drain port is protected.After carrying dust to enter dust cover inside from the gap, a wind can reduce pressure in the cushion chamber increase-volume, consume part energy, part dust can strike on the protective plate and is folded to when dust continued vertical motion to protective plate, have only the tiny dust of sub-fraction can arrive interior drain port sealing place, and this part dust can be blown under the effect of sealing general mood stream.
Because on-the-spot medium-speed pulverizer operating condition very severe inevitably some accidents can occur.Little such as the sealing air quantity, grinding machine stops up, and grinding machine vibration etc. all can influence the sealing of grinding machine, causes closed chamber and pressure chamber dust stratification.Blow grey interface by closed chamber and pressure chamber are online for this reason, compressed air is received pressure chamber blow ash inlet and annular seal space and blow on ash enters the mouth, annular seal space ash hole and pressure chamber ash hole are then received dust collecting box.Each interface is all controlled by valve.When pressure chamber need blow ash, pressure chamber can be blown ash inlet and pressure chamber ash hole opens, compressed air will blow the ash inlet from pressure chamber and enter, enter dust collecting box from the discharge of pressure chamber ash hole, because compressed air pressure is big, the flow velocity height can take the ash that accumulates in the pressure chamber in the dust collecting box to, realizes the cleaning to pressure chamber.In like manner, the closed chamber cleaning is the valve open that annular seal space is blown ash inlet and annular seal space ash hole, blows ash.
Advantage of the present utility model is novel structure, can realize not having clearance automatic compensation after the outer drain port carbon ring working face wearing and tearing, guarantee to contact with mill spindle all the time, can not cause the part to leak out together because of carbon ring is extruded into, can effectively not reduce the outer discharge of sealing wind because of the end face dieback can't compensate automatically yet.Change the outer drain port top carbon ring of traditional carbon ring type sealing into removable straight-through labyrinth ring, improved the life-span of potted component herein, reduced simultaneously to seal the resistance that wind enters closed chamber, increased the sealability of interior drain port.Interior drain port adopts removable staggered form labyrinth seal, can effectively stop dust to enter closed chamber, reduces the wearing and tearing of dust to carbon ring.Interior drain port also is furnished with movable dust cover, can stop that not only dust passes through interior drain port, drain port staggered form sealing ring element in can also changing easily.Increase and blow grey interface, utilize the compressed air selective sootblowing, can reduce the wearing and tearing of ash and coal dust accumulation, prolong the replacement cycle in service life of improving carbon ring, guarantee that to greatest extent the normal of coal pulverizer moves continuously carbon ring.
Description of drawings
Fig. 1 is the utility model structural representation, is upward view;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Fig. 4 is the C-C cutaway view of Fig. 1;
Fig. 5 is the D-D cutaway view of Fig. 1;
Fig. 6 is the I portion enlarged drawing of Fig. 2;
Fig. 7 is the II portion enlarged drawing of Fig. 2.
The specific embodiment
Dust cover installing rack 3 is fixedlyed connected with mill by bolt 1, and dust cover 9 is fixedlyed connected with mounting bracket by bolt 28, and 15 of sealing device housings pass through filler ring 16 fixedlys connected with the medium-speed pulverizer body; Carbon ring carriage 13 is fixed on the sealing device housing by bolt 3 14, limited block 27 usefulness steady pins 28 are fixedlyed connected with the carbon ring carriage, the per pass of three road carbon rings 12 evenly is divided into 18 sections, respectively with ring spring 26 sockets, straight-through labyrinth ring 11 is fixedlyed connected with the sealing device housing by bolt 4 10, form pressure chamber 32 between straight-through labyrinth ring and three road carbon rings, interior drain port staggered form labyrinth rotary packing ring 4 usefulness screws 5 29 are fixedlyed connected with the dust cover installing rack, interior drain port staggered form labyrinth stationary seal ring 5 usefulness screws 66 are fixedlyed connected with the sealing device housing, protective plate 24 usefulness bolts 77 are fixedlyed connected with interior drain port rotary packing ring, the sealing device housing has closed chamber 31, dust cover, 15 of protective plate and sealing device housings form cushion chamber 30; Four uniform sealing wind interfaces 17 are fixedlyed connected with pressure chamber, and pressure chamber blows ash inlet 18, pressure chamber ash hole 21 is connected with pressure chamber respectively, and annular seal space blows ash inlet 19, annular seal space ash hole 20 is connected with annular seal space respectively; Dust cover installing rack top has top to adjust pad 2, and 16 of sealing device housing 15 and filler rings have the bottom to adjust pad 33, and the gusset 1 of reinforcement is arranged on the dust cover installing rack, and the gusset 2 23 of reinforcement is arranged on the dust cover 9, and the sealing device housing has the gusset 3 25 of reinforcement.
Claims (3)
1. medium-speed pulverizer mill spindle seal ring apparatus is characterized in that: the dust cover installing rack is fixedlyed connected with mill by bolt one, and dust cover passes through bolt two fixedlys connected with mounting bracket, and the sealing device housing is then fixedlyed connected with the medium-speed pulverizer body by filler ring; The carbon ring carriage is fixed on the sealing device housing by bolt three, limited block is fixedlyed connected with the carbon ring carriage with steady pin, the per pass of three road carbon rings is the section of being divided into evenly, respectively with a ring spring socket, the straight-through labyrinth ring is fixedlyed connected with the sealing device housing by bolt four, form pressure chamber between straight-through labyrinth ring and three road carbon rings, interior drain port staggered form labyrinth rotary packing ring is fixedlyed connected with the dust cover installing rack with screw five, interior drain port staggered form labyrinth stationary seal ring is fixedlyed connected with the sealing device housing with screw six, protective plate is fixedlyed connected with interior drain port rotary packing ring with bolt seven, the sealing device housing has closed chamber, dust cover, form cushion chamber between protective plate and sealing device housing; Four uniform sealing wind interfaces are fixedlyed connected with pressure chamber, and pressure chamber blows the ash inlet, the pressure chamber ash hole is connected with pressure chamber respectively, and annular seal space blows the ash inlet, the annular seal space ash hole is connected with annular seal space respectively.
2. medium-speed pulverizer mill spindle seal ring apparatus according to claim 1 is characterized in that: dust cover installing rack top has top to adjust pad, has the bottom to adjust pad between sealing device housing and filler ring.
3. medium-speed pulverizer mill spindle seal ring apparatus according to claim 1 and 2 is characterized in that: the gusset one of reinforcement is arranged on the dust cover installing rack, the gusset two of reinforcement is arranged on the dust cover, the sealing device housing has the gusset three of reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201402362U CN201702678U (en) | 2010-03-17 | 2010-03-17 | Medium-speed millstone shaft sealing ring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201402362U CN201702678U (en) | 2010-03-17 | 2010-03-17 | Medium-speed millstone shaft sealing ring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201702678U true CN201702678U (en) | 2011-01-12 |
Family
ID=43439828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201402362U Expired - Fee Related CN201702678U (en) | 2010-03-17 | 2010-03-17 | Medium-speed millstone shaft sealing ring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201702678U (en) |
Cited By (2)
| 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 |
| 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 |
-
2010
- 2010-03-17 CN CN2010201402362U patent/CN201702678U/en not_active Expired - Fee Related
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 |
| 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 |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20110317 |