CN223270611U

CN223270611U - Sealing device of medium-speed coal mill

Info

Publication number: CN223270611U
Application number: CN202422186594.1U
Authority: CN
Inventors: 祁增荣; 祁博渊; 祁林颖; 祁海波; 徐德发; 夏顺为
Original assignee: Anhui Qiying Power Equipment Technology Co ltd
Current assignee: Anhui Qiying Power Equipment Technology Co ltd
Priority date: 2024-09-06
Filing date: 2024-09-06
Publication date: 2025-08-26
Anticipated expiration: 2034-09-06

Abstract

The utility model discloses an airtight device of a medium-speed coal mill, which relates to the field of sealing devices of coal mills and comprises a rotating shaft, an upper sealing assembly and a lower sealing assembly, wherein the upper sealing assembly comprises a sealing disc and a flange, the sealing disc is fixedly arranged on the rotating shaft, the flange is sleeved outside the rotating shaft, the flange is positioned below the sealing disc, the lower sealing assembly comprises a base, the base is fixedly arranged below the flange, the base is sleeved outside the rotating shaft, a sealing bin is arranged on the base, a graphite sleeve is arranged in the sealing bin, the graphite sleeve is sleeved outside the rotating shaft, and a graphite ring I is sleeved outside the graphite sleeve and is positioned in the sealing bin. The utility model aims to disclose a sealing device of a medium-speed coal mill, which improves the sealing performance and the working reliability of the coal mill.

Description

Sealing device of medium-speed coal mill

Technical Field

The utility model relates to the field of coal mill sealing devices, in particular to a medium-speed coal mill sealing device.

Background

In the application scene of modern industry, especially in key production links such as blast furnace ironmaking, the effect of medium speed coal mill is crucial. The equipment is mainly responsible for grinding medium-hardness materials such as bituminous coal and lean coal into fine powder, and the process has wide application in various industries such as power generation, metallurgy, building material manufacturing, chemical product production and the like. In these industries, the operating efficiency and stability of coal mills have a direct impact on the continuity and economic benefits of the overall production process.

Therefore, improvement of performance of the coal mill, particularly improvement of sealing performance of internal mechanical parts thereof, is one of key directions of technical progress. However, conventional sealing techniques suffer from a number of disadvantages, including poor sealing due to the high temperature operating environment of the coal mill and particle wear. In addition, after long-term operation of the medium speed coal mill, the gap between the inner sealing surface and the sealing surface of the transmission disc is easy to gradually increase due to abrasion. The change can cause insufficient sealing wind pressure in the sealing cavity of the lower frame body, and further cause the failure of the sealing function in the lower frame body of the medium-speed coal mill, thereby causing a series of problems such as powder leakage, frequent maintenance and the like.

The existence of these problems not only affects the normal operation and production efficiency of the equipment, but also may cause environmental pollution and potential safety hazard. Therefore, aiming at the defects of the traditional sealing technology of the medium-speed coal mill, the technical innovation and improvement are particularly important.

Disclosure of Invention

The utility model aims to provide an airtight device of a medium-speed coal mill, which solves the problems that the traditional sealing device is easy to leak powder and is frequently maintained.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The sealing device of the medium-speed coal mill comprises a rotating shaft and is characterized in that an upper sealing component and a lower sealing component;

the upper sealing assembly comprises a sealing disc and a flange, the sealing disc is fixedly arranged on the rotating shaft, the flange is sleeved outside the rotating shaft, and the flange is positioned below the sealing disc;

The lower sealing assembly comprises a base, the base is fixedly arranged below the flange, the base is sleeved outside the rotating shaft, a sealing bin is arranged on the base, a graphite sleeve is arranged in the sealing bin, the graphite sleeve is sleeved outside the rotating shaft, a graphite ring I is sleeved outside the graphite sleeve, and the graphite ring I is positioned in the sealing bin.

Preferably, the sealing disc is fixedly arranged on the rotating shaft and rotates along with the rotating shaft, and the grinding disc is fixedly arranged above the sealing disc.

Preferably, a placing bin is arranged on the flange, an annular groove is arranged at the bottom of the placing bin, a sealing ring is arranged in the annular groove, and a limiting block is arranged in the placing bin.

Preferably, the sealing disc is installed in placing the storehouse, sealing disc below is equipped with the spacing groove, normal running fit between spacing groove and the stopper, install the elastic ring in the spacing groove for increase the leakproofness, the elastic ring is located the stopper top.

Preferably, the sealing disk below is equipped with the boss, the boss is located and places the storehouse bottom, is located the sealing washer top, boss outside cover is equipped with graphite circle two, is located and places the storehouse, graphite circle two has self-lubricating nature, guarantees the wearability of device.

Preferably, the base is fixedly mounted on the coal mill housing.

Preferably, the first graphite ring is fixedly arranged in the sealing bin, a positioning groove is formed in the first graphite ring, a graphite sleeve is fixedly arranged in the first graphite ring, and the graphite sleeve has self-lubricating property and is used for reducing abrasion of the shaft.

Preferably, a positioning ring is fixedly arranged on the outer side of the graphite sleeve, a positioning block is arranged on the positioning ring, and the positioning block is arranged in the positioning groove to limit the rotation of the graphite sleeve.

Preferably, the positioning ring is positioned below the flange, and a rubber ring is arranged between the positioning ring and the flange, so that the tightness in the device is ensured.

Compared with the prior art, the utility model has the beneficial effects that:

the design concept of the utility model is to remarkably reduce the leakage problem of a sealing system through an up-down double sealing mechanism. The design includes two parts, an upper seal assembly and a lower seal assembly, to ensure the overall sealing effect and safety performance of the device.

The upper seal assembly is particularly equipped with a graphite ring which effectively blocks the ingress of larger particulate matter into the seal system and the graphite itself is self-lubricating, reducing wear on the seal faces and thereby protecting the seal faces from damage. In addition, the assembly is also provided with two sealing rings, and the double sealing structure greatly reduces the internal leakage of gas or fine particles in a cold sealing state. The design strengthens the sealing performance of the whole sealing system, ensures the strict limitation of internal media and avoids possible environmental pollution or influence on subsequent processes.

The lower sealing assembly adopts the graphite sleeve, so that on one hand, the sealing effect on the device is enhanced, on the other hand, the rotating shaft is protected, the service life of the device is prolonged, and in addition, the positioning ring is also arranged, so that the graphite ring is prevented from rotating along with the shaft in the use process of the device, the abrasion in the sealing device is accelerated, the sealing performance is reduced, and the leakage of particulate matters such as coal ash carried by hot air can be effectively prevented.

Drawings

FIG. 1 is an elevation view of a sealing device for a medium speed coal mill according to the present utility model

FIG. 2 is a split view of a sealing device of a medium speed coal mill according to the present utility model

FIG. 3 is a schematic view showing the internal components of a sealing device of a medium speed coal mill according to the present utility model

FIG. 4 is a schematic view of the external components of a sealing device for a medium speed coal mill according to the present utility model

In the figure:

1. The upper sealing component, 101, a sealing disc, 103, a sealing ring, 104, a second graphite ring, 105, an elastic ring, 106, a flange, 109, a placing bin, 110, an annular groove, 111, a limit groove, 112, a limit block, 113 and a boss 2, the lower sealing component, 201, a base, 203, a positioning ring, 204, a graphite sleeve, 205, a first graphite ring, 206, a rubber ring, 208, a rotating shaft, 209, a sealing bin, 210, a positioning block, 211 and a positioning groove;

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which are obtained without inventive effort by a person skilled in the art based on the embodiments of the present utility model, are within the scope of the present utility model.

Referring to fig. 1-4, the present utility model provides the following technical solutions:

The sealing disc is fixedly arranged on the rotating shaft and rotates along with the rotating shaft, and the grinding disc is fixedly arranged above the sealing disc.

The flange is provided with a placing bin, the bottom of the placing bin is provided with an annular groove, a sealing ring is arranged in the annular groove, and a limiting block is arranged in the placing bin.

The sealing disc is installed in placing the storehouse, the sealing disc below is equipped with the spacing groove, normal running fit between spacing groove and the stopper, install the elastic ring in the spacing groove for increase the leakproofness, the elastic ring is located the stopper top.

The sealing disk below is equipped with the boss, the boss is located and places the storehouse bottom, is located the sealing washer top, boss outside cover is equipped with graphite circle two, is located and places the storehouse, graphite circle two has self-lubricating nature, guarantees the wearability of device.

The base is fixedly arranged on the coal mill shell.

The first graphite ring is fixedly arranged in the sealing bin, a positioning groove is formed in the first graphite ring, a graphite sleeve is fixedly arranged in the first graphite ring, and the graphite sleeve has self-lubricating property and is used for reducing abrasion of a shaft.

The graphite sleeve is fixedly arranged on the outer side of the graphite sleeve, a positioning block is arranged on the positioning ring and is arranged in the positioning groove to limit the rotation of the graphite sleeve.

The locating ring is located the flange below, install the rubber ring between locating ring and the flange, guarantee the device internal seal nature.

Claims

1. The sealing device of the medium-speed coal mill comprises a rotating shaft (208) and is characterized in that an upper sealing component (1) and a lower sealing component (2);

The upper sealing assembly (1) comprises a sealing disc (101) and a flange (106), wherein the sealing disc (101) is fixedly arranged on a rotating shaft (208), the flange (106) is sleeved on the outer side of the rotating shaft (208), and the flange (106) is positioned below the sealing disc (101);

The lower sealing assembly (2) comprises a base (201), the base (201) is fixedly arranged below the flange (106), the base (201) is sleeved outside the rotating shaft (208), a sealing bin (209) is arranged on the base (201), a graphite sleeve (204) is arranged in the sealing bin (209), the graphite sleeve (204) is sleeved outside the rotating shaft (208), and a graphite ring (205) is sleeved outside the graphite sleeve (204) and is positioned in the sealing bin (209).

2. The medium speed coal mill sealing device according to claim 1, wherein the sealing disc (101) is fixedly arranged on the rotating shaft (208) and rotates along with the shaft, and a grinding disc is fixedly arranged above the sealing disc (101).

3. The medium speed coal mill sealing device according to claim 1, wherein the flange (106) is provided with a placement bin (109), an annular groove (110) is formed in the bottom of the placement bin (109), a sealing ring (103) is arranged in the annular groove (110), and a limiting block (112) is arranged in the placement bin (109).

4. The medium speed coal mill sealing device according to claim 1, wherein the sealing disc (101) is installed in the placement bin (109), a limiting groove (111) is formed below the sealing disc (101), the limiting groove (111) is in running fit with the limiting block (112), an elastic ring (105) is installed in the limiting groove (111) and used for improving sealing performance, and the elastic ring (105) is located above the limiting block (112).

5. The medium speed coal mill sealing device according to claim 3, wherein a boss (113) is arranged below the sealing disc (101), the boss (113) is arranged at the bottom of the placement bin (109) and above the sealing ring (103), a graphite ring II (104) is sleeved outside the boss (113) and is arranged in the placement bin (109), and the graphite ring II (104) has self-lubricating property and ensures the wear resistance of the device.

6. A medium speed pulverizer sealing device as in claim 1, wherein the base (201) is fixedly mounted to the pulverizer housing.

7. The medium speed coal mill sealing device according to claim 1, wherein the graphite ring I (205) is fixedly arranged in the sealing bin (209), a positioning groove (211) is formed in the graphite ring I (205), a graphite sleeve (204) is fixedly arranged in the graphite ring I (205), and the graphite sleeve (204) has self-lubricating property and is used for reducing abrasion of a shaft.

8. The medium speed coal mill sealing device according to claim 1, wherein a positioning ring (203) is fixedly arranged on the outer side of the graphite sleeve (204), a positioning block (210) is arranged on the positioning ring (203), and the positioning block (210) is arranged in the positioning groove (211) to limit the rotation of the graphite sleeve (204).

9. The medium speed coal mill sealing device according to claim 8, wherein the positioning ring (203) is located below the flange (106), and a rubber ring (206) is installed between the positioning ring (203) and the flange (106) to ensure the tightness in the device.