CN206661331U - A kind of medium-speed pulverizer mill sealing device - Google Patents
A kind of medium-speed pulverizer mill sealing device Download PDFInfo
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- CN206661331U CN206661331U CN201720116274.6U CN201720116274U CN206661331U CN 206661331 U CN206661331 U CN 206661331U CN 201720116274 U CN201720116274 U CN 201720116274U CN 206661331 U CN206661331 U CN 206661331U
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- mill
- protective cover
- sealing
- ring body
- seal ring
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Abstract
A kind of speed coal mill mill sealing device, including seal ring body on lower frame, protective cover, the air duct for connecting seal ring body sealing air interface, improvements introduced be：The contact surface of described seal ring body and mill cylinder is the labyrinth sealing periphery with multiple tracks groove, protective cover is decomposed into the two parts being connected up and down, top half protective cover is sealingly mounted on mill, the joint of upper and lower part protective cover has to connecting ring and the lower ring of docking, and to connecting ring, the mutual interface of the lower ring of docking forms interlaced labyrinth sealing mating surface.Good effect of the present utility model is：Because seal ring body uses numerous little groove labyrinth structures, seal ring body inner sealing wind pressure can be effectively kept, protective cover is using upper and lower two parts and by butt joint ring labyrinth seal, so as to ensure mill with that can not reveal hot blast and dust at seal ring body.Because the structure does not have easy-abrasion part, the permanent and non-maintaining of mill sealing can be realized.
Description
Technical field
The utility model belongs to field of work machines, and in particular to bunker coal is worn into the coal pulverizer of coal dust in thermal power plant.
Background technology
More use is a kind of coal dust that raw coal is milled into certain fineness requirement in the wheeled coal pulverizer of middling speed of thermal power plant,
The equipment dried and be delivered to outside mill to coal dust is completed simultaneously.
The basic structure of existing medium-speed pulverizer is as shown in Figure 4：Including main motor 1, main motor is driven by shaft coupling
Reductor 2 rotates, and the mill 7 being fixed on above reductor output flange rotates with, the coal spout that raw coal passes through separator 10
Fall on mill, under the loading force that the hydraulic jack of drag link mechanism 13 provides, apply pressure to 8 grinding rollers by 9 pressue devices, from
And coal dust is milled into coal dust and is sprayed by the hot blast of a middle hot-wind inlet of support body by nozzle ring 12 and dry coal dust, by coal
It is outer that powder transfers out mill.In order to prevent to outward leakage hot blast and dust at rotary part mill, in the mill 7 and lower frame 4 of rotation
Between set include seal ring body 5, the sealing device of protective cover 6.It is defeated to the inner chamber of mill seal ring body 5 by sealing air pipeline 11
Send sealing air, prevent the dust with low-pressure air from leaking, and by 6 two stops of protective cover, with ensure coal pulverizer safe operation and
The cleaning of site environment.
Between above-mentioned seal ring body and rotary part, sealed using carbon ring, fluted on seal ring body, carbon ring is solid
It is scheduled on seal ring body, carbon ring is fixed on inside grooves by spring, is contacted with mill, and back-up ring and mill formation small―gap suture are close
Envelope.It is to be sealed by carbon ring with the friction of mill rotating contact, carbon ring is easy due to the mill sealing device of carbon ring structure
Wearing terrain, gap is formed between mill after carbon ring abrasion, when gap is bigger than normal, will to coal pulverizer external leakage hot blast and
Dust, and carbon ring is fragile material, is easily broken into pieces.Simultaneously as back-up ring and abrasive disk space are larger, sealing air is directly at cooperation
Gap to coal pulverizer internal leakage sealing air, cause mill and the sealing wind pressure at sealing ring relatively low, also easily cause this
Locate sealing air deficiency and to mill leakage hot blast and dust.The structure not only needs periodically to stop the carbon that mill checks and changes abrasion
Ring.The continuous and steady operation of coal pulverizer is influenceed, causing the repair and maintenance workload of user increases.The inspection of user is also increased simultaneously
Repair maintenance cost.Because maintenance needs to shut down, the stability and generation load of unit operation are reduced.In addition, described protection
The sealing of cover lower end is fixed on lower frame, and closing is realized in upper end by stretching into the annular groove of rotary part downward, protection effect
Fruit is poor.
Utility model content
The purpose of this utility model is to provide a medium-speed pulverizer mill sealing device, overcomes existing coal pulverizer sealing dress
Put above shortcomings.
The utility model mill sealing device includes the seal ring body, protective cover, connection being arranged on coal pulverizer lower frame
The air duct of seal ring body sealing air interface, improvements introduced are：The contact surface of described seal ring body and mill cylinder is band
There is the labyrinth sealing periphery of multiple tracks groove, small―gap suture sealing is formed with mill.
To improve the sealing property of protective cover, described protective cover is decomposed into the two parts being connected up and down, and top half is prevented
Shield is sealingly mounted on mill and rotated with mill, and the latter half protective cover is sealingly mounted on lower frame, top and the bottom protection
The joint of cover has to be connected on top half protective cover and the latter half protective cover descends ring to connecting ring and docking, right
Connect ring, the mutual interface of the lower ring of docking forms the interlaced labyrinth sealing mating surface of multiple tracks annular groove.
Good effect of the present utility model is：Novel grinding disc sealing device, because seal ring body uses numerous little grooves
Structure, and coordinated with mill using small―gap suture, form seal ring body inner sealing wind direction outward leakage and hinder, can effectively protect
Seal ring body inner sealing wind pressure is held, protective cover is also sealed using labyrinth structure, can also hinder a hot blast to mill, protection
Revealed in the annular seal space that cover is formed with seal ring body, so as to ensure mill with hot blast and dust can not be revealed at seal ring body, more
Be advantageous to the stabilization that equipment is continuously run.Simultaneously as the structure does not have easy-abrasion part, it is not necessary to parts are changed, can
Realize the permanent and non-maintaining of mill sealing.The utility model avoids the overhaul of the equipments of coal pulverizer here, is advantageous to subtract
The maintenance cost of the repair time of user, time between overhauls(TBO) and equipment less.
Brief description of the drawings.
Fig. 1 is the utility model coal pulverizer mill sealing device entirety sectional view.
Fig. 2 is the utility model seal ring body and protective cover Local map.
Fig. 3 is existing medium-speed pulverizer mill sealing device figure.
Fig. 4 is existing medium-speed pulverizer overall structure figure.
Embodiment
Refering to Fig. 1, Fig. 2, Fig. 3, the utility model mill sealing device includes the sealing being arranged on coal pulverizer lower frame 4
Ring body 5, protective cover 6, the blast pipe 3 for connecting seal ring body sealing air interface, described seal ring body 5 connect with the cylinder of mill 7
Contacting surface is the labyrinth sealing periphery with multiple tracks groove, and small―gap suture sealing is formed with mill；Described protective cover 6 is decomposed into
The two parts being connected up and down, top half protective cover are sealingly mounted on mill 7 and rotated with mill, the sealing of the latter half protective cover
On lower frame 4, the joint of top and the bottom protective cover is connected to top half protective cover and the latter half is prevented
Multiple tracks annular groove is formed to ring 6-1 under connecting ring 6-2 and docking, the interface mutual to ring under connecting ring, docking on shield
Interlaced labyrinth sealing mating surface.
Claims (2)
1. a kind of medium-speed pulverizer mill sealing device, including seal ring body on coal pulverizer lower frame, protective cover, company
The air duct of seal ring body sealing air interface is connect, it is characterized in that：The contact surface of described seal ring body and mill cylinder is to carry
The labyrinth sealing periphery of multiple tracks groove, small―gap suture sealing is formed with mill.
2. a kind of medium-speed pulverizer mill sealing device according to claim 1, it is characterized in that：Protective cover is decomposed into up and down
Two parts of linking, top half protective cover are sealingly mounted on mill and rotated with mill, the sealing installation of the latter half protective cover
On lower frame, the joint of top and the bottom protective cover is connected on top half protective cover and the latter half protective cover
To connecting ring and the lower ring of docking, form the interlaced fan of multiple tracks annular groove to connecting the mutual interface of ring, the lower ring of docking
Palace formula sealing mating surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720116274.6U CN206661331U (en) | 2017-02-08 | 2017-02-08 | A kind of medium-speed pulverizer mill sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720116274.6U CN206661331U (en) | 2017-02-08 | 2017-02-08 | A kind of medium-speed pulverizer mill sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206661331U true CN206661331U (en) | 2017-11-24 |
Family
ID=60378181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720116274.6U Active CN206661331U (en) | 2017-02-08 | 2017-02-08 | A kind of medium-speed pulverizer mill sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206661331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952269A (en) * | 2018-09-27 | 2020-04-03 | 青岛海尔滚筒洗衣机有限公司 | Drum washing machine |
-
2017
- 2017-02-08 CN CN201720116274.6U patent/CN206661331U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952269A (en) * | 2018-09-27 | 2020-04-03 | 青岛海尔滚筒洗衣机有限公司 | Drum washing machine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 3388 century street, Changchun Economic Development Zone, Jilin Province, Jilin Patentee after: China Electric Construction Group Changchun power generation equipment Co., Ltd. Address before: Two district Huairenlu 130000 Jilin province Changchun No. 1 Patentee before: Changchun Power Generation Equipment Plant |