Metal wire brush type sealing device at transmission disc and medium-speed bowl type coal mill

Abstract

The embodiment of the utility model discloses a metal wire brush type sealing device at the position of a driving disc and a medium-speed bowl type coal mill, the metal wire brush type sealing device at the position of the driving disc comprises a plurality of first arc-shaped plates and a plurality of first metal wire brushes, the first arc-shaped plates are connected with the first metal wire brushes, and the first arc-shaped plates and the first metal wire brushes are connected with the first metal wire brushes. By arranging the first arc-shaped plates and the first metal wire brushes, in the rotating process of the transmission disc, on the premise that it is guaranteed that an air channel is sealed through an original machine base, the height of a sealing point of the machine base and the transmission disc is increased, and the sealing effect of the transmission disc is improved. Pebble coal particles can be prevented from falling between the driving disc and the engine base seal, so that the problems that the pebble coal particles affect abrasion between the driving disc and the engine base seal and an original carbon crystal sealing ring spring is jammed and fails are solved, and air leakage and ash pollution to the environment between the driving disc and the engine base seal are eliminated; and the running temperature of the speed reducer is high due to leakage of hot primary air.

Description

Technical Field

[0001] The utility model relates to the technical field of coal grinding equipment, in particular to a metal wire brush type sealing device at a transmission disc and a medium-speed bowl type coal grinding machine. Background Art

[0002] The existing medium-speed bowl-type coal mill uses a positive pressure seal with a sealed fan at the transmission disc. If the coal mill is operating abnormally and the stone coal is not discharged in time, the stone coal particles of the stone coal scraper will be squeezed by the scraper and fall between the transmission disc and the machine base seal, and get stuck between the transmission disc and the machine base seal to cause wear, or get stuck on the upper part of the spring carbon ring, causing the carbon ring to not rebound normally and lose its sealing function. As the amount of operating wear increases, the air leakage rate increases, polluting the surrounding environment and causing the temperature of the coal mill reducer to rise. In severe cases, the coal mill reducer protection action will cause shutdown. Utility Model Content

[0003] Based on this, it is necessary to provide a wire brush seal device at the transmission disc and a medium-speed bowl-type coal mill, which aims to solve the problem that the existing medium-speed bowl-type coal mill uses a positive pressure seal with a sealing fan at the transmission disc. If the coal mill runs abnormally and the gravel coal is not discharged in time, the gravel coal particles of the gravel coal scraper will be squeezed by the scraper and fall between the transmission disc and the machine base seal, and get stuck between the transmission disc and the machine base seal to cause wear, or get stuck on the upper part of the spring carbon ring, causing the carbon ring to not rebound normally and lose its sealing effect. With the increase in the amount of wear during operation, the air leakage rate increases, polluting the surrounding environment and causing the temperature of the coal mill reducer to rise. In severe cases, the coal mill reducer protection action causes the coal mill reducer to stop operating.

[0004] In the first aspect, the utility model provides a wire brush type sealing device at a transmission disc, wherein the wire brush type sealing device at the transmission disc comprises a first arc plate and a first wire brush, wherein the first arc plate is connected to the first wire brush, and a plurality of the first arc plates and the first wire brush are provided, and surround the transmission disc, and each of the first arc plates is installed on a machine base, and each of the first wire brushes is in contact with the transmission disc.

[0005] In one embodiment, the first wire brush is connected to one end of the first arc-shaped plate and is arranged toward the transmission disc.

[0006] In one embodiment, the distance between the first arc plate and the transmission plate is 3 mm-5 mm.

[0007] In one embodiment, the thickness of the first metal wire brush is greater than 10 mm.

[0008] In one embodiment, the wire brush sealing device at the transmission disc also includes a second arc-shaped plate and a second wire brush. A plurality of the second arc-shaped plates and the second wire brush are provided, and they are arranged around the transmission disc, the first arc-shaped plates and the first wire brushes. The second arc-shaped plates are installed on the machine base, and the second wire brushes are in contact with the transmission disc.

[0009] In one embodiment, the second wire brush is connected to one end of the second arc-shaped plate and is arranged toward the transmission disc.

[0010] In one embodiment, the second curved plate is in contact with the first curved plate.

[0011] In one embodiment, the thickness of the second metal wire brush is greater than 10 mm.

[0012] In one embodiment, in a first direction, a height of the first curved plate is lower than a height of the second curved plate.

[0013] In a second aspect, the utility model further provides a medium-speed bowl-type coal mill, which comprises a wire brush sealing device at the transmission disc of any of the above-mentioned embodiments.

[0014] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0015] The utility model adopts a wire brush type sealing device at a transmission disc and a medium-speed bowl-type coal mill, wherein the first arc plate of the wire brush type sealing device at the transmission disc is connected to the first wire brush, and a plurality of the first arc plates and the first wire brushes are provided and surround the transmission disc, and each first arc plate is installed on the machine base, and each first wire brush is in contact with the transmission disc. By arranging the first arc plate and the first wire brush, the sealing point height of the machine base and the transmission disc is raised under the premise of ensuring the original machine base sealing air channel during the rotation of the transmission disc, and the stone coal particles can be blocked from falling between the transmission disc and the machine base seal, thereby solving the problem of stone coal particles affecting the wear between the transmission disc and the machine base seal and the jamming failure of the original carbon crystal sealing ring spring, thereby eliminating the air leakage and ash pollution between the transmission disc and the machine base seal, as well as the defect of high operating temperature of the mill reducer caused by the leakage of hot primary air. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] in:

[0018] Figure 1 Schematic diagram of an axonometric view of a first curved plate and a first wire brush in one embodiment.

[0019] Figure 2 Schematic diagram of an axonometric view of a second curved plate and a second wire brush in one embodiment.

[0020] Reference numerals:

[0021] 1. First curved plate; 2. First metal wire brush; 3. Second curved plate; 4. Second metal wire brush. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0025] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0026] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0027] Please combine Figure 1 to Figure 2 The metal wire brush type sealing device at the transmission disc provided by the utility model is now described. The metal wire brush type sealing device at the transmission disc is used in a medium-speed bowl-type coal mill.

[0028] The wire brush type sealing device at the transmission disc includes a first arc plate 1 and a first wire brush 2. The first arc plate 1 is connected to the first wire brush 2. There are multiple first arc plates 1 and first wire brushes 2, and the transmission disc is surrounded by each first arc plate 1. Each first arc plate 1 is installed on the machine base, and each first wire brush 2 is in contact with the transmission disc. Specifically, the size of the first arc plate 1 is 650×450×8mm. After the first arc plate 1 is processed, it is spliced ​​into a circular product on site. The material of the first arc plate 1 is Q355 steel, and the material of the first wire brush 2 is 304 stainless steel.

[0029] It can be understood that the first arc plate 1 of the wire brush sealing device at the transmission disc is connected to the first wire brush 2, and the first arc plate 1 and the first wire brush 2 are both provided in plurality and surround the transmission disc, and each first arc plate 1 is installed on the machine base, and each first wire brush 2 is in contact with the transmission disc. By arranging the first arc plate 1 and the first wire brush 2, the sealing point height of the machine base and the transmission disc is raised while ensuring the original machine base sealing air channel during the rotation of the transmission disc, which can prevent stone and coal particles from falling between the transmission disc and the machine base seal, thereby solving the problem of stone and coal particles affecting the wear between the transmission disc and the machine base seal and the jamming and failure of the original carbon crystal sealing ring spring, thereby eliminating the air leakage and ash pollution between the transmission disc and the machine base seal, as well as the defect of high operating temperature of the mill reducer caused by the leakage of hot primary air.

[0030] In addition, since the first arc plate 1 and the first wire brush 2 are provided to prevent stone and coal particles from falling between the transmission disc and the machine base seal, it does not affect the sealing air from being discharged from between the first wire brush 2 into the coal mill scraper.

[0031] It should be noted that the transmission disc can rotate relative to the machine base, and the machine base seal can be a sealing structure of the machine base and the transmission disc. The first arc plate 1 is welded to the machine base. During the operation of the medium-speed bowl mill, the first arc plate 1 and the first wire brush 2 are stationary, and the transmission disc rotates, which can prevent the stones in the stone coal chamber from leaking out from the gap between the transmission disc and the machine base.

[0032] In this embodiment, the first wire brush 2 is connected to one end of the first arc plate 1 and is arranged in the direction of the transmission disc. In this way, the first arc plate 1 can be welded to the machine base, and the first wire brush 2 can contact the transmission disc. Since the first wire brush 2 contacts the transmission disc, it will not affect the rotation of the transmission disc. During long-term use, since the first wire brush 2 is a flexible wire, it will not cause significant wear to the transmission disc.

[0033] Furthermore, the distance between the first curved plate 1 and the transmission disc is 3 mm-5 mm. In this way, the first curved plate 1 does not affect the rotating transmission disc. In some embodiments, the distance between the first curved plate 1 and the transmission disc is 3 mm, 4 mm or 5 mm.

[0034] Furthermore, the thickness of the first wire brush 2 is greater than 10 mm. Since there is a certain distance between the first arc plate 1 and the transmission disc, the thickness of the first wire brush 2 is greater than 10 mm, so that the first wire is in interference contact with the rotating transmission disc, thereby preventing the stones in the stone coal chamber from leaking out of the gap between the transmission disc and the machine base.

[0035] In one embodiment, if Figure 2 As shown, the wire brush seal device at the transmission disc also includes a second arc plate 3 and a second wire brush 4. A plurality of the second arc plates 3 and the second wire brush 4 are provided, and the transmission disc, the first arc plates 1 and the first wire brushes 2 are surrounded. The second arc plates 3 are installed on the machine base, and the second wire brushes 4 are in contact with the transmission disc. The reliability of the seal can be further improved by providing the second arc plate 3 and the second wire.

[0036] Specifically, the size of the second arc plate 3 is 800×330×8 mm, and the second arc plate 3 is spliced ​​into a circular product on site after processing. The material of the second arc plate 3 is Q355 steel, and the material of the second metal wire brush 4 is 304 stainless steel.

[0037] In this embodiment, the second wire brush 4 is connected to one end of the second arc plate 3 and is arranged in the direction of the transmission disc. In this way, the second arc plate 3 can be welded on the machine base, and the second wire brush 4 can contact the transmission disc. Since the second wire brush 4 contacts the transmission disc, it will not affect the rotation of the transmission disc. In the process of long-term use, since the second wire brush 4 is a flexible wire, it will not cause significant wear to the transmission disc.

[0038] Furthermore, the second arc-shaped plate 3 fits the first arc-shaped plate 1, so that the distance between the second arc-shaped plate 3 and the transmission disc can be reduced, so that the second wire brush 4 can be in interference contact with the rotating transmission disc.

[0039] Furthermore, the thickness of the second wire brush 4 is greater than 10 mm. Since there is a certain distance between the second arc plate 3 and the transmission disc, the thickness of the second wire brush 4 is greater than 10 mm, so that the second wire is in interference contact with the rotating transmission disc, thereby preventing the stones in the stone coal chamber from leaking out of the gap between the transmission disc and the machine base.

[0040] In one embodiment, if Figure 1 and Figure 2As shown, in the first direction, the height of the first arc plate 1 is lower than the height of the second arc plate 3. By providing the first metal wire brush 2 and the second metal wire brush 4 which are not easy to be height-controlled, the reliability of the two-layer sealing is higher.

[0041] It should be noted that the first direction may be a horizontal direction or a vertical direction according to the placement positions of the first curved plate 1 and the second curved plate 3. For ease of understanding, in the relevant embodiments, the first direction is a vertical direction.

[0042] The utility model also provides a medium-speed bowl-type coal mill, which comprises a metal wire brush type sealing device at the transmission disc of any one of the above embodiments.

[0043] It can be understood that the medium-speed bowl-type coal mill of the utility model uses the above-mentioned wire brush sealing device at the transmission disc, so that the first arc plate 1 of the wire brush sealing device at the transmission disc is connected to the first wire brush 2, and the first arc plate 1 and the first wire brush 2 are provided in plurality and surround the transmission disc, and each first arc plate 1 is installed on the machine base, and each first wire brush 2 is in contact with the transmission disc. By arranging the first arc plate 1 and the first wire brush 2, during the rotation of the transmission disc, it is possible to prevent stone coal particles from falling between the transmission disc and the machine base seal, thereby solving the problem of stone coal particles affecting the wear between the transmission disc and the machine base seal and the jamming and failure of the original carbon crystal sealing ring spring, thereby eliminating the air leakage and ash pollution between the transmission disc and the machine base seal, as well as the defect of high operating temperature of the mill reducer caused by the leakage of hard hot primary air.

[0044] In addition, since the first arc plate 1 and the first wire brush 2 are provided to prevent stone and coal particles from falling between the transmission disc and the machine base seal, it does not affect the sealing air from being discharged from between the first wire brush 2 into the coal mill scraper.

[0045] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A wire brush seal device at a transmission disc, characterized in that: The wire brush sealing device at the transmission disc includes a first arc plate and a first wire brush, the first arc plate is connected to the first wire brush, a plurality of the first arc plates and the first wire brush are provided, and the first arc plates and the first wire brush are arranged around the transmission disc, each of the first arc plates is installed on the machine base, and each of the first wire brushes is in contact with the transmission disc.

2. The wire brush seal device at the transmission plate according to claim 1, characterized in that: The first metal wire brush is connected to one end of the first arc-shaped plate and is arranged toward the direction of the transmission disc.

3. The wire brush seal device for the transmission disc according to claim 2, characterized in that: The distance between the first arc plate and the transmission disc is 3mm-5mm.

4. The wire brush seal device for the transmission disc according to claim 3, characterized in that: The thickness of the first metal wire brush is greater than 10 mm.

5. The wire brush seal device for the transmission disc according to claim 1, characterized in that: The wire brush sealing device at the transmission disc also includes a second arc-shaped plate and a second wire brush. A plurality of the second arc-shaped plates and the second wire brush are provided, and they are arranged around the transmission disc, the first arc-shaped plates and the first wire brushes. The second arc-shaped plates are installed on the machine base, and the second wire brushes are in contact with the transmission disc.

6. The wire brush seal device for the transmission plate according to claim 5, characterized in that: The second metal wire brush is connected to one end of the second arc-shaped plate and is arranged toward the direction of the transmission disc.

7. The wire brush seal device for the transmission plate according to claim 6, characterized in that: The second arc-shaped plate is in contact with the first arc-shaped plate.

8. The wire brush seal device for the transmission plate according to claim 7, characterized in that: The thickness of the second metal wire brush is greater than 10 mm.

9. The wire brush seal device for the transmission plate according to claim 5, characterized in that: In the first direction, the height of the first curved plate is lower than the height of the second curved plate.

10. A medium speed bowl type coal mill, characterized in that: The medium-speed bowl-type coal mill comprises a wire brush seal device at the transmission plate as described in any one of claims 1-9.

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