CN216361136U - Dynamic and static base sealing device for coal mill - Google Patents
Dynamic and static base sealing device for coal mill Download PDFInfo
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- CN216361136U CN216361136U CN202122398170.8U CN202122398170U CN216361136U CN 216361136 U CN216361136 U CN 216361136U CN 202122398170 U CN202122398170 U CN 202122398170U CN 216361136 U CN216361136 U CN 216361136U
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Abstract
The utility model relates to a dynamic and static base sealing device for a coal mill. At present, the phenomena of air leakage and coal particle leakage often occur at the transmission disc part of the coal mill, so that a speed reducer and a hydraulic cylinder of the coal mill are buried by a large amount of stone coal, and the safety of a hydraulic oil system of the coal mill is directly threatened. A kind of coal mill moves the static base sealing means, its composition includes: the sealing device comprises a flat iron (1), a metal slag blocking ring (5), a sealing element (3), an external static sealing element (6) and a dynamic sealing element (8), wherein the sealing element, a flange element A (4) and a spring A (2) form an internal sealing assembly, the flange element A fixes the sealing element on a coal mill driving disc through bolts, and the spring A is connected with the coal mill driving disc (10); the external static sealing element, the dynamic sealing element, the flange element B (7) and the spring B (9) form an external sealing assembly, and the flange element B fixes the external static sealing element and the dynamic sealing element at the position of the sealing seat of the coal mill body through bolts. The utility model is applied to the field of coal mills.
Description
Technical Field
The utility model relates to a dynamic and static base sealing device for a coal mill.
Background
Coal mills are important equipment in power plants, and directly affect the stability and economy of unit operation, so that the normal operation of the coal mills is very important. The phenomena of air leakage and coal particle leakage often occur at the transmission disc part of the coal mill, and sparks are emitted under severe conditions. The speed reducer and the hydraulic cylinder of the coal mill are buried by a large amount of stone coal, so that the safety of a hydraulic oil system and a lubricating oil system of the coal mill is directly threatened, the coal mill cannot normally operate, and the safety and the economical efficiency of unit operation are influenced.
The sealing air chamber is formed by forming a false closed space through the transmission disc and the base sealing device, and introducing sealing air with certain pressure to form a positive pressure area, so that pebble coal generated in the operation of the coal mill is prevented from entering the inside of the sealing air chamber to cause damage (namely external sealing) of a carbon ring, a large amount of pebble coal is prevented from leaking from the external sealing to influence the operation of the coal mill. However, the transmission disc is a rotating part, the base seal is a static part, the transmission disc and the base seal generate 2 gaps inner seal and outer seal which move relatively through installation, the inner seal is gradually increased along with abrasion of cinder and fly ash carried by primary air, the outer seal always contacts and rubs with the shaft along with accumulation of operation hours, a groove is generated on the shaft, the seal gap is increased, and along with the increase of the two gaps, the air leakage amount of a positive pressure area in the seal air pressure is large, so that the pressure of the positive pressure area can not be maintained under the pressure of pebble coal to be sealed.
Disclosure of Invention
The utility model aims to provide a dynamic and static base sealing device for a coal mill.
The above purpose is realized by the following technical scheme:
a kind of coal mill moves the static base sealing means, its composition includes: the sealing element, the flange piece A and the spring A form an inner sealing assembly, the flange piece A fixes the sealing element on a coal mill driving disc through a bolt, and the spring A is connected with the coal mill driving disc;
the external static seal, the dynamic seal element, the flange element B and the spring B form an external seal assembly, the flange element B fixes the external static seal element and the dynamic seal element at the position of a sealing seat of a coal mill body through bolts, and the spring B is connected with the sealing seat of the coal mill body.
The inner sealing assembly and the outer sealing assembly form a composite rubber sealing structure and are arranged on the machine shell.
The coal mill motor-driven static base sealing device is characterized in that a metal slag blocking ring is installed on one side of the outer sealing assembly and one side of the inner sealing assembly, and the outer sealing assembly and the inner sealing assembly are sealed and covered in the machine shell by the metal slag blocking ring.
The coal mill motor-driven static base sealing device is characterized in that the metal slag blocking ring is connected with the flat iron and rotates along with the transmission disc of the coal mill.
The utility model has the beneficial effects that:
1. the utility model relates to a dynamic and static base sealing device for a coal mill, which is formed by combining a composite rubber seal, a metal slag blocking ring, a spring and the like and is additionally arranged on a transmission disc of the coal mill and a sealing seat of a body of the coal mill. The composite rubber seal is arranged on the machine shell, and the metal slag-stopping ring covers the composite rubber seal inside to protect the composite rubber seal from being abraded by coal slag. The metal slag blocking ring rotates along with the grinding disc, and the composite rubber seal is embraced on the machine shell. The dynamic and static combined sealing can thoroughly solve the problems of air leakage and powder leakage at the bottom of the coal mill.
The utility model can effectively and radically cure the phenomena of air leakage and coal particle leakage at the transmission disc part of the coal mill, and the field civilized production level is greatly improved. The phenomenon that the load of the unit is influenced by replacing the carbon ring of the coal mill is greatly reduced, and the economical efficiency of the unit operation is greatly improved.
The sealing principle after the transformation of the utility model is as follows: the inner seal compensates the abrasion increase gap through the sealing element, and the sealing gap is reduced, so that the effects of reducing air leakage and improving air pressure are achieved. The outer sealing barrel over-moving sealing element replaces the former 2-ring carbon ring, and the groove and the sealing gap generated by shaft abrasion are compensated through the tightening force of the mounting spring and the flexibility of the sealing element, so that the effects of reducing air leakage and improving air pressure are achieved.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of an unmodified front base seal arrangement.
The coal mill comprises a flat iron, 2, springs A, 3, sealing elements, 4, flange elements A, 5, metal slag blocking rings, 6, an external static sealing element, 7, flange elements B, 8, a dynamic sealing element, 9, springs B, 10, a coal mill transmission disc, 11, an internal seal, 12, an external seal, 13, a sealing air chamber, 14 and a carbon ring.
The specific implementation mode is as follows:
example 1:
a kind of coal mill moves the static base sealing means, its composition includes: the sealing device comprises a flat iron 1, a metal slag stopping ring 5, a sealing element 3, an external static sealing element 6 and a dynamic sealing element 8, wherein the sealing element, a flange element A4 and a spring A2 form an internal sealing assembly, the flange element A fixes the sealing element on a coal mill driving disc through bolts, and the spring A is connected with the coal mill driving disc 10; the external static sealing element, the dynamic sealing element, the flange element B7 and the spring B9 form an external sealing assembly, the flange element B fixes the external static sealing element and the dynamic sealing element at the position of a sealing seat of a coal mill body through bolts, and the spring B is connected with the sealing seat of the coal mill body. The inner sealing assembly and the outer sealing assembly form a composite rubber sealing structure and are arranged on the machine shell.
Example 2:
according to the coal mill motor-driven static base sealing device in the embodiment 1, one side of the outer sealing assembly and one side of the inner sealing assembly are provided with the metal slag blocking rings, and the metal slag blocking rings cover the outer sealing assembly and the inner sealing assembly in the machine shell.
Example 3:
according to the coal mill motor static base sealing device in the embodiment 1 or 2, the metal slag blocking ring is connected with the flat iron, and the metal slag blocking ring rotates along with the transmission disc of the coal mill.
Claims (3)
1. A kind of coal mill moves the static base sealing means, its composition includes: band iron, metal pushing off the slag ring, sealing member, outside static seal and move the sealing member, characterized by: the sealing element, the flange element A and the spring A form an inner sealing assembly, the flange element A fixes the sealing element on a coal mill driving disc through a bolt, and the spring A is connected with the coal mill driving disc;
the external static sealing element, the dynamic sealing element, the flange element B and the spring B form an external sealing assembly, the flange element B fixes the external static sealing element and the dynamic sealing element at the position of a sealing seat of a coal mill body through bolts, and the spring B is connected with the sealing seat of the coal mill body;
the inner sealing assembly and the outer sealing assembly form a composite rubber sealing structure and are arranged on the machine shell.
2. The coal pulverizer motor static base sealing device of claim 1, wherein: the outer seal assembly and one side of the inner seal assembly are provided with metal slag blocking rings, and the outer seal assembly and the inner seal assembly are sealed and arranged in the machine shell by the metal slag blocking rings.
3. The coal pulverizer motor static base sealing device of claim 2, wherein: the metal slag blocking ring is connected with the flat iron and rotates along with the transmission disc of the coal mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122398170.8U CN216361136U (en) | 2021-09-30 | 2021-09-30 | Dynamic and static base sealing device for coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122398170.8U CN216361136U (en) | 2021-09-30 | 2021-09-30 | Dynamic and static base sealing device for coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216361136U true CN216361136U (en) | 2022-04-22 |
Family
ID=81188583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122398170.8U Active CN216361136U (en) | 2021-09-30 | 2021-09-30 | Dynamic and static base sealing device for coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216361136U (en) |
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2021
- 2021-09-30 CN CN202122398170.8U patent/CN216361136U/en active Active
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