CN116989142A - Sealing wind system of medium-speed coal mill in thermal power plant - Google Patents
Sealing wind system of medium-speed coal mill in thermal power plant Download PDFInfo
- Publication number
- CN116989142A CN116989142A CN202310868136.3A CN202310868136A CN116989142A CN 116989142 A CN116989142 A CN 116989142A CN 202310868136 A CN202310868136 A CN 202310868136A CN 116989142 A CN116989142 A CN 116989142A
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- CN
- China
- Prior art keywords
- sealing
- ring
- seat
- sealing chamber
- body seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 175
- 239000003245 coal Substances 0.000 title claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000012856 packing Methods 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/002—Sealings comprising at least two sealings in succession
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a sealing wind system of a medium-speed coal mill in a thermal power plant, which comprises a lower frame body, wherein a sealing seat is arranged at the lower end of the lower frame body, a main shaft is rotationally connected between the lower frame body and the sealing seat, the sealing seat comprises an upper body seat and a lower body seat, and a second bolt is connected between the upper body seat and the lower body seat through a flange plate; the inner wall of the upper body seat is provided with a first sealing chamber and a second sealing chamber, the inner wall of the lower body seat is provided with a third sealing chamber and a fourth sealing chamber, rubber rings and reinforcing structures are arranged in the sealing chambers in a sliding mode, carbon type sealing rings are arranged in the rubber rings of the first sealing chamber and the second sealing chamber, and sealing packing is arranged in the rubber rings of the third sealing chamber and the fourth sealing chamber. When the maintenance operation of replacing the sealing ring is performed, the carbon ring cavity and the sealing air pipeline can not be completely disassembled, so that the labor is saved, the maintenance is convenient, the loss and the purchase cost of the carbon ring are reduced, the sealing performance is good, and the service life is long.
Description
Technical Field
The invention mainly relates to the technical field of coal mill sealing, in particular to a sealing wind system of a medium-speed coal mill in a thermal power plant.
Background
The coal mill is a pressurized device, and in order to prevent the leakage of hot gas in the coal mill, a lower frame body of the coal mill is sealed by installing a carbon type sealing ring. The sealing ring is a flange ring, sealing wind is introduced into the flange ring, and the sealing ring is arranged on the upper surface of the lower frame body through the inner protective cover. The carbon ring type sealing ring is adopted, the advantages of good sealing effect, abrasion resistance and the like are considered for the sealing ring, the sealing ring is a split forming piece, spare parts are convenient to purchase, and the outer ring of the carbon ring is provided with a shrinkage fixing spring, so that the function of automatically compensating the abrasion of the carbon ring is achieved within a certain range.
However, in the actual operation process, the carbon ring cavity often enters the pulverized coal particles to cause no movable gap between the carbon ring and the cavity, the carbon ring is firmly clamped in the cavity, and the shrinkage spring does not work (the reason that the carbon ring cavity enters the pulverized coal particles is mainly that the coal is blocked and ground and is thrown through a pebble coal feed opening under the condition of no ventilation, the gap is enlarged due to daily abrasion of the labyrinth seal and the reason that the coal particles enter the labyrinth seal), so that the sealing effect of the lower frame sealing ring is lost, and hot air leaks.
In the process of overhauling the carbon ring, as the occupied area of the coal mill of most power plants is limited, the design of the lower frame body overhauling port is smaller, when the carbon ring cavity is cleaned and the carbon ring is replaced, the reserved cavity overhauling port does not have replacement conditions, the whole cavity is required to be completely dismantled every time the carbon ring cavity is overhauled, the sealing air pipeline attached to the cavity is also required to be dismantled, the overhauling workload is enlarged, the overhauling time is prolonged, the cost of the spare parts of the carbon ring is higher, and the purchase price of each time is about 3 ten thousand.
Therefore, in order to avoid completely detaching the carbon ring chamber and the sealing air pipeline during the overhauling operation of replacing the sealing ring in the future, the invention is characterized in that the sealing air system of the medium-speed coal mill in the thermal power plant is capable of saving labor, facilitating overhauling, reducing the loss and the purchase cost of the carbon ring and is specially provided with Ji Ben.
Disclosure of Invention
The invention mainly provides a sealing wind system of a medium-speed coal mill in a thermal power plant, which is used for solving the technical problems in the background technology.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a medium speed pulverizer seal wind system in thermal power plant, includes down the support body, the lower extreme of lower support body is equipped with the seal receptacle, just be connected with first bolt between lower support body and the seal receptacle, rotate between lower support body and the seal receptacle and be connected with the main shaft, the seal receptacle includes upper body seat and lower body seat, just be connected with the second bolt through the ring flange between upper body seat and the lower body seat, upper body seat lateral wall is connected with the connection pad, threaded connection has adjusting bolt on the connection pad, just adjusting bolt one end orientation lower body seat lateral wall and with lower body seat lateral wall contact each other; the inner wall of the upper body seat is provided with a first sealing chamber and a second sealing chamber, the inner wall of the lower body seat is provided with a third sealing chamber and a fourth sealing chamber, rubber rings and reinforcing structures are arranged in the first sealing chamber, the second sealing chamber, the third sealing chamber and the fourth sealing chamber in a sliding mode, a carbon type sealing ring is arranged in the rubber rings positioned in the first sealing chamber and the second sealing chamber, and sealing packing is arranged in the rubber rings positioned in the third sealing chamber and the fourth sealing chamber; the reinforced structure comprises annular grooves arranged on the upper side and the lower side of the inside of each sealing cavity, an annular stop block is arranged at the upper end inside each annular groove, and a supporting spring is arranged at the lower end of each annular stop block.
Preferably, a sealing gasket is arranged between the sealing seat and the lower frame body, and the first bolt penetrates through the sealing gasket.
Preferably, the bolt hole of the flange plate is a movable expansion hole.
Preferably, a compression spring is connected between the outer side wall of the rubber plug ring and the inner side wall of the sealing chamber.
Preferably, the outer side walls of the carbon sealing ring and the sealing packing are connected with circular rings, and the outer side walls of the circular rings are arc-shaped.
Preferably, the inner side wall of the rubber plug ring is arc-shaped, and the outer side wall of the circular ring is matched with the inner side wall of the rubber plug ring.
Preferably, the upper end surface of the ring stop block is arc-shaped, and the surface is smooth.
Preferably, the lower end of the ring stop block is connected with a movable plug ring sliding in the ring groove, the support spring is connected with the lower end of the movable plug ring, and the other end of the support spring is connected with the bottom wall of the ring groove.
Preferably, the upper ring groove and the lower ring groove are positioned in the sealing chamber near one end of the opening, and the movable plug ring is positioned in the ring groove when the supporting spring is fully extended.
Preferably, two layers of copper teeth are embedded in the upper end of the inner side wall of the upper body seat and the lower end of the inner side wall of the lower body seat.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the invention can replace the sealing process of the sealing ring cavity of the lower frame body without completely disassembling the sealing ring cavity of the lower frame body and the sealing air pipeline of the coal mill, thereby saving labor and facilitating maintenance;
secondly, the sealing packing is adopted by the lower two layers of sealing rings, so that the manufacturing cost of the sealing rings is far lower than that of the carbon rings, the sealing effect is not inferior to that of the carbon rings, the sealing rings are more convenient and quicker when the lower frame body sealing rings are replaced, the loss of the carbon rings is saved, and the investment for purchasing spare parts is reduced;
thirdly, the gap adjusting function between the sealing packing of the sealing ring cavity of the lower frame body and the main shaft is realized by manually screwing the adjusting bolt, and on the basis of ensuring the sealing effect and preventing hot air from leaking out, the abrasion degree of the packing seal in the sealing cavity can be judged by adjusting the moving distance of the bolt, so that the next overhaul and replacement time can be conveniently determined;
fourth, every sealed cavity all has compression spring and rubber ring to extrude, reduces the clearance value, and reinforced structure can avoid buggy granule to enter into sealed cavity, increases the life of device.
The invention will be explained in detail below with reference to the drawings and specific embodiments.
Drawings
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is an enlarged view of the invention at A;
FIG. 4 is an enlarged view of the invention at B;
FIG. 5 is an enlarged view of the invention at C;
fig. 6 is an enlarged view of the invention at D.
Description of the drawings: 1. a lower frame body; 11. a first bolt; 12. a sealing gasket; 2. a sealing seat; 21. an upper body seat; 201. a first sealed chamber; 202. a second sealed chamber; 22. a lower body seat; 203. a third sealed chamber; 204. a fourth sealed chamber; 23. a second bolt; 24. a connecting disc; 25. an adjusting bolt; 26. copper teeth; 211. a rubber plug ring; 212. a carbon seal ring; 213. sealing packing; 214. a compression spring; 215. a circular ring; 3. a reinforcing structure; 31. a ring groove; 32. a ring stopper; 33. a support spring; 34. a movable plug ring; 4. a main shaft.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will be rendered by reference to the appended drawings, in which several embodiments of the invention are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this invention belongs, and the knowledge of terms used in the description of this invention herein for the purpose of describing particular embodiments is not intended to limit the invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-4, a sealing wind system of a medium speed coal mill in a thermal power plant includes a lower frame 1, a sealing seat 2 is disposed at a lower end of the lower frame 1, a first bolt 11 is connected between the lower frame 1 and the sealing seat 2, a sealing pad 12 is disposed between the sealing seat 2 and the lower frame 1, the first bolt 11 penetrates through the sealing pad 12, the lower frame 1 and the sealing seat 2 are sealed by the sealing pad 12, a spindle 4 is rotationally connected between the lower frame 1 and the sealing seat 2, the sealing seat 2 includes an upper body seat 21 and a lower body seat 22, a second bolt 23 is connected between the upper body seat 21 and the lower body seat 22 by a flange, a first sealing chamber 201 and a second sealing chamber 202 are disposed on an inner wall of the upper body seat 21, and a third sealing chamber 203 and a fourth sealing chamber 204 are disposed on an inner wall of the lower body seat 22. On the basis of the sealing seat in the prior art, the sealing seat 2 is reformed into two parts, four sealing rings are usually arranged in the sealing seat in the prior art (according to the actual condition of a power plant), the two sealing chambers at the lower part are changed into independent detachable sealing chambers, the two layers above the sealing chambers are unchanged, and the sealing chambers are still sealed by carbon rings, so that when the sealing seat 2 is overhauled in the future, the sealing chambers of the lower frame body 1 are detachable in a split mode, only the lowest two layers of sealing rings need to be replaced, according to the operation hours of the coal mill and the major repair plan of the coal mill, whether the upper two layers of sealing rings are replaced is determined again, the overhauling time is shortened, the weight of the split type chamber is greatly reduced compared with that of the original chamber, the workload of personnel for disassembling the sealing chambers is reduced, the split type chamber is more convenient to disassemble, and the sealing air pipeline connected with the sealing ring chamber of the lower frame body 1 is always positioned above the sealing ring chambers, namely the first sealing chamber and the second sealing chamber, so that the improvement does not influence the installation of the sealing air pipeline, and the next two layers of sealing air pipeline need to be disassembled in the future, labor is saved, and overhauling is convenient.
Referring to fig. 1-4, the side wall of the upper body seat 21 is connected with a connecting disc 24, the connecting disc 24 is connected with an adjusting bolt 25 in a threaded manner, one end of the adjusting bolt 25 faces the side wall of the lower body seat 22 and contacts with the side wall of the lower body seat 22, and the bolt hole of the flange plate is a movable expansion hole. The gap adjusting function between the sealing packing 213 of the sealing ring cavity and the main shaft 4 is achieved by manually screwing the adjusting bolt 25, the sealing effect is guaranteed, the abrasion degree of packing sealing in the sealing cavity can be judged through the moving distance of the adjusting bolt 25 on the basis of preventing hot air leakage, and the next maintenance and replacement time is convenient to determine.
Referring to fig. 1-4, rubber rings 211 and reinforcing structures 3 are slidably disposed in the first sealing chamber 201, the second sealing chamber 202, the third sealing chamber 203 and the fourth sealing chamber 204, carbon sealing rings 212 are disposed in the rubber rings 211 of the first sealing chamber 201 and the second sealing chamber 202, and sealing packing 213 is disposed in the rubber rings 211 of the third sealing chamber 203 and the fourth sealing chamber 204. The lower two layers of sealing rings adopt sealing packing 213, so that the manufacturing cost of the sealing rings is far lower than that of the carbon type sealing rings 212, the sealing effect is not inferior to that of the carbon type sealing rings 212, the sealing rings are more convenient and quicker when the lower frame body sealing rings are replaced, the loss of the carbon type sealing rings 212 is saved, and the investment for purchasing spare parts is reduced.
Referring to fig. 1, 4, 5 and 6, a compression spring 214 is connected between the outer sidewall of the rubber stopper ring 211 and the inner sidewall of the sealing chamber, the outer sidewalls of the carbon seal ring 212 and the sealing packing 213 are both connected with a circular ring 215, the outer sidewall of the circular ring 215 is arc-shaped, the inner sidewall of the rubber stopper ring 211 is arc-shaped, and the outer sidewall of the circular ring 215 is adapted to the inner sidewall of the rubber stopper ring 211. The compression spring 214 and the rubber stopper ring 211 are arranged for extrusion, so that the gap value can be reduced, the reinforcing structure 3 comprises annular grooves 31 arranged on the upper side and the lower side of the interior of each sealing cavity, ring stoppers 32 are arranged at the upper ends of the interior of the annular grooves 31, supporting springs 33 are arranged at the lower ends of the ring stoppers 32, the upper end faces of the ring stoppers 32 are arc-shaped, the surfaces of the upper end faces of the ring stoppers 32 are smooth, movable stopper rings 34 sliding on the annular grooves 31 are connected at the lower ends of the movable stopper rings 34, the other ends of the supporting springs 33 are connected to the bottom wall of the annular grooves 31, the upper end and the lower end of each annular groove 31 are positioned in the sealing cavity and close to one opening end, and when the supporting springs 33 are fully extended, the movable stopper rings 34 are positioned in the interior of the annular grooves 31. The reinforcing structure 3 can prevent pulverized coal particles from entering the sealing chamber, the service life of the device is prolonged, and as the outer side wall of the circular ring 215 is arc-shaped, the upper end surface of the ring stop 32 is arc-shaped, so that the sealing ring can be conveniently installed and replaced, the surface of the ring stop 32 is smooth, and the taking out is further facilitated.
Referring to fig. 1-3, two layers of copper teeth 26 are embedded in the upper end of the inner side wall of the upper body seat 21 and the lower end of the inner side wall of the lower body seat 22, and blade tips are processed at the front end of each layer of copper teeth 26, so that the copper teeth 26 can throttle dust in the inner part and reduce the internal gas pressure, thereby playing a role in ash blocking and throttling.
The specific operation flow of the invention is as follows:
when changing the sealing ring, because sealing seat 2 is the components of a whole that can function independently detachable, only need take down lower body seat 22 can, change the two-layer sealing ring of bottommost, according to the mill operation hours number and combine the mill overhaul plan, decide whether to change two-layer sealing ring again, the maintenance time has been shortened, and split type cavity weight lightens than original cavity weight greatly, the work load of personnel dismantlement sealing chamber has been alleviateed, more convenient dismantlement, have the clearance adjustment function between sealing ring cavity sealing packing 213 and the main shaft 4 simultaneously, can realize through artifical screwing adjusting bolt 25, guarantee sealed effect, prevent on the basis of hot-blast leakage function, the removal distance through adjusting bolt 25 also can judge the wear degree of packing seal in the sealing chamber, be convenient for confirm next overhaul change time, have compression spring 214 and rubber stopper 211 and extrude, can reduce the clearance value, reinforcing structure 3 can avoid buggy granule to enter into sealing chamber, increase the life of device, and because ring 215 lateral wall is the arc, ring stop 32 up end is set up to the arc, the installation of being convenient for, copper tooth 26 can be broken down, the inside sharp tooth 26 is fast when setting up the main shaft, the main shaft is broken, the pressure of the main shaft is reduced, can be broken, the main shaft is broken down, and the dust is broken when the main shaft is broken down, and 4 is broken rapidly, and can take place in the main shaft 4, and the inside the main shaft is broken, and can be broken down.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the embodiments described above, but is intended to be within the scope of the invention, as long as such insubstantial modifications are made by the method concepts and technical solutions of the invention, or the concepts and technical solutions of the invention are applied directly to other occasions without any modifications.
Claims (9)
1. The utility model provides a sealed wind system of medium speed pulverizer of thermal power plant, includes support body (1), its characterized in that: the lower end of the lower frame body (1) is provided with a sealing seat (2), a first bolt (11) is connected between the lower frame body (1) and the sealing seat (2), a main shaft (4) is rotationally connected between the lower frame body (1) and the sealing seat (2), the sealing seat (2) comprises an upper body seat (21) and a lower body seat (22), a second bolt (23) is connected between the upper body seat (21) and the lower body seat (22) through a flange plate, a connecting disc (24) is connected to the side wall of the upper body seat (21), an adjusting bolt (25) is connected to the upper thread of the connecting disc (24), and one end of the adjusting bolt (25) faces to the side wall of the lower body seat (22) and contacts with the side wall of the lower body seat (22) mutually;
the inner wall of the upper body seat (21) is provided with a first sealing chamber (201) and a second sealing chamber (202), the inner wall of the lower body seat (22) is provided with a third sealing chamber (203) and a fourth sealing chamber (204), rubber plug rings (211) and reinforcing structures (3) are arranged in the first sealing chamber (201), the second sealing chamber (202), the third sealing chamber (203) and the fourth sealing chamber (204) in a sliding mode, carbon type sealing rings (212) are arranged in the rubber plug rings (211) of the first sealing chamber (201) and the second sealing chamber (202), and sealing packing (213) are arranged in the rubber plug rings (211) of the third sealing chamber (203) and the fourth sealing chamber (204);
the reinforcing structure (3) comprises annular grooves (31) arranged on the upper side and the lower side of the inside of each sealing cavity, annular stop blocks (32) are arranged at the upper end inside the annular grooves (31), and supporting springs (33) are arranged at the lower ends of the annular stop blocks (32).
2. The sealed wind system of a medium speed coal pulverizer in a thermal power plant according to claim 1, wherein: a sealing gasket (12) is arranged between the sealing seat (2) and the lower frame body (1), and the first bolt (11) penetrates through the sealing gasket (12).
3. The sealed wind system of a medium speed coal pulverizer in a thermal power plant according to claim 1, wherein: the bolt hole of the flange plate is a movable expansion hole.
4. The sealed wind system of a medium speed coal pulverizer in a thermal power plant according to claim 1, wherein: a compression spring (214) is connected between the outer side wall of the rubber plug ring (211) and the inner side wall of the sealing chamber.
5. The sealed wind system of a medium speed coal pulverizer in a thermal power plant according to claim 1, wherein: the carbon type sealing ring is characterized in that the outer side walls of the carbon type sealing ring (212) and the sealing packing (213) are connected with a circular ring (215), the outer side wall of the circular ring (215) is arc-shaped, the inner side wall of the rubber plug ring (211) is arc-shaped, and the outer side wall of the circular ring (215) is matched with the inner side wall of the rubber plug ring (211).
6. The sealed wind system of a medium speed coal pulverizer in a thermal power plant according to claim 1, wherein: the upper end face of the ring stop block (32) is arc-shaped, and the surface is smooth.
7. The sealed wind system of a medium speed coal pulverizer in a thermal power plant according to claim 1, wherein: the lower end of the ring stop block (32) is connected with a movable plug ring (34) sliding in the ring groove (31), the supporting spring (33) is connected to the lower end of the movable plug ring (34), and the other end of the supporting spring (33) is connected to the bottom wall of the ring groove (31).
8. The sealed wind system of a medium speed coal pulverizer in a thermal power plant of claim 7, wherein: the upper ring groove (31) and the lower ring groove (31) are positioned in the sealed cavity and close to one end of the opening, and when the supporting spring (33) is fully extended, the movable plug ring (34) is positioned in the ring groove (31).
9. The sealed wind system of a medium speed coal pulverizer in a thermal power plant according to claim 1, wherein: two layers of copper teeth (26) are embedded in the upper end of the inner side wall of the upper body seat (21) and the lower end of the inner side wall of the lower body seat (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310868136.3A CN116989142A (en) | 2023-07-14 | 2023-07-14 | Sealing wind system of medium-speed coal mill in thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310868136.3A CN116989142A (en) | 2023-07-14 | 2023-07-14 | Sealing wind system of medium-speed coal mill in thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116989142A true CN116989142A (en) | 2023-11-03 |
Family
ID=88524103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310868136.3A Pending CN116989142A (en) | 2023-07-14 | 2023-07-14 | Sealing wind system of medium-speed coal mill in thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116989142A (en) |
-
2023
- 2023-07-14 CN CN202310868136.3A patent/CN116989142A/en active Pending
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