Air sealing device

Abstract

The utility model discloses an air sealing device which comprises an air sealing shaft sleeve. The air sealing shaft sleeve is arranged on the outer surface of a main shaft in a sleeving mode and is tightly connected with the main shaft. An air seal disc is arranged on one side of the air seal shaft sleeve and arranged on the outer surface of the main shaft in a sleeving mode, a labyrinth structure is arranged between the air seal shaft sleeve and the air seal disc, one end of the labyrinth structure is connected with the air seal disc, the other end of the labyrinth structure is in clearance fit with the air seal shaft sleeve, and an air inlet hole and an air outlet hole are formed in the air seal disc. Protective gas enters the gas sealing disc from the gas inlet hole, passes through the labyrinth structure and enters the mixing barrel from the gas outlet hole. A labyrinth structure is arranged between the gas seal shaft sleeve and the gas seal disc, the gas seal disc is provided with a gas inlet hole and a gas outlet hole, protective gas enters the gas seal disc from the gas inlet hole, passes through the labyrinth structure and enters the mixing barrel from the gas outlet hole, powder can be effectively prevented from entering the main shaft, abrasion of the main shaft is reduced, and the service life of the main shaft can be prolonged.

Description

Technical Field

[0001] The utility model relates to a gas sealing device, belonging to the technical field of coating equipment. Background Art

[0002] During the operation of the coating machine, the transmission spindle rotates in the barrel. Since there is nano-powder in the barrel, the nano-powder can easily enter the transmission spindle during the rotation of the transmission spindle. Therefore, some people set a sealing structure on the transmission spindle. However, the existing sealing structure can intercept the nano-powder in a short time, but during the long-term rotation of the transmission spindle, the nano-powder will still enter the transmission spindle through the gap of the sealing structure. After the nano-powder enters the spindle, the wear of the spindle is accelerated, shortening the service life of the spindle. Utility Model Content

[0003] In view of the deficiencies of the prior art, the purpose of the utility model is to provide an air sealing device which can prevent nano powder from entering into the spindle, reduce spindle wear, and extend the service life of the spindle.

[0004] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model includes an air sealing device,

[0005] An air sealing device includes an air sealing sleeve, which is sleeved on the outer surface of a main shaft and is tightly connected to the main shaft; an air sealing disk is provided on one side of the air sealing sleeve, and the air sealing disk is sleeved on the outer surface of the main shaft; a labyrinth structure is provided between the air sealing sleeve and the air sealing disk, one end of the labyrinth structure is connected to the air sealing disk, and the other end of the labyrinth structure is loosely matched with the air sealing sleeve; an air inlet and an air outlet are provided on the air sealing disk, and protective gas enters the air sealing disk from the air inlet and enters a mixing barrel from the air outlet through the labyrinth structure.

[0006] Furthermore, a plurality of annular grooves are provided at one end of the gas seal sleeve close to the gas seal disk, and the maze structure includes a maze body and a plurality of annular protrusions provided on the maze body, the annular grooves correspond to the positions of the annular protrusions one by one, the annular protrusions are located in the annular grooves, and there is a gap between the annular protrusions and the annular grooves for the protective gas to pass through.

[0007] Furthermore, a sealing ring is arranged between the air sealing disk and the air sealing sleeve, one end of the sealing ring is tightly connected to the air sealing disk, the other end of the sealing ring is loosely matched with the air sealing sleeve, and the sealing ring is tightly matched with the labyrinth structure.

[0008] Furthermore, a wear-resistant sleeve is arranged between the main shaft and the air seal plate, the wear-resistant sleeve is arranged on the outer surface of the main shaft and is tightly connected to the main shaft, and at least one oil seal is arranged between the wear-resistant sleeve and the air seal plate.

[0009] Furthermore, a plurality of oil seals are arranged between the wear-resistant sleeve and the air seal plate, and two adjacent oil seals are arranged back to back.

[0010] Furthermore, the oil seal is U-shaped.

[0011] Furthermore, the air seal disc is provided with an oil inlet hole and an oil outlet hole, and the lubricating oil enters the air seal disc from the oil inlet hole and is discharged from the oil outlet hole through the oil seal.

[0012] Furthermore, the air seal sleeve is connected to the main shaft via a first key.

[0013] Furthermore, the air sealing disk is connected to the main shaft via a second key.

[0014] Compared with the prior art, the advantages of the utility model include:

[0015] 1) The utility model provides an air sealing device, wherein a labyrinth structure is arranged between the air sealing sleeve and the air sealing disk, and the air sealing disk is provided with an air inlet and an air outlet. The protective gas enters the air sealing disk from the air inlet and enters the mixing barrel from the air outlet through the labyrinth structure, which can effectively prevent powder from entering the interior of the main shaft, reduce the wear of the main shaft, and extend the service life of the main shaft.

[0016] 2) In the gas sealing device provided by the utility model, an oil seal is arranged between the wear-resistant sleeve and the gas sealing disc. The oil seal is a heat-resistant grease oil seal, which plays a role in lubricating and cooling the rotating parts. The gas sealing disc is provided with an oil inlet hole and an oil outlet hole. The lubricating oil enters the gas sealing disc from the oil inlet hole and passes through the oil seal to lubricate the main shaft, the wear-resistant sleeve and the gas sealing sleeve, and cools the rotating parts (including the main shaft, the gas sealing sleeve and the wear-resistant sleeve), which can extend the service life of the rotating parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application 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 recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of a gas sealing device provided in a typical implementation case of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a maze structure provided in a typical implementation case of the utility model;

[0020] Figure 3 It is a structural schematic diagram of an oil seal provided in a typical implementation case of the utility model;

[0021] Explanation of the reference numerals in the accompanying drawings: 1. air seal sleeve; 2. main shaft; 3. air seal disk; 4. labyrinth structure; 5. air inlet hole; 6. annular groove; 7. annular protrusion; 8. sealing ring; 9. wear-resistant sleeve; 10. oil seal; 11. oil inlet hole. DETAILED DESCRIPTION

[0022] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the utility model after long-term research and extensive practice. The technical solution, its implementation process and principle will be further explained as follows.

[0023] like Figure 1 As shown, the utility model discloses an air sealing device, which includes an air sealing sleeve 1, which is sleeved on the outer surface of the main shaft 2 and is tightly connected to the main shaft 2; specifically, the air sealing sleeve 1 is connected to the main shaft 2 through a first key. An air sealing disk 3 is provided on one side of the air sealing sleeve 1, which is sleeved on the outer surface of the main shaft 2. Specifically, the air sealing disk 3 is connected to the main shaft 2 through a second key. A labyrinth structure 4 is provided between the air sealing sleeve 1 and the air sealing disk 3, one end of the labyrinth structure 4 is connected to the air sealing disk 3, and the other end of the labyrinth structure 4 is loosely matched with the air sealing sleeve 1. An air inlet 5 and an air outlet are provided on the air sealing disk 3. The protective gas enters the air sealing disk 3 from the air inlet 5, passes through the labyrinth structure 4, and enters the mixing barrel from the air outlet, which can effectively prevent the powder from entering the inside of the main shaft 2, reduce the wear of the main shaft 2, and extend the service life of the main shaft 2. Specifically, as Figure 2 As shown, the end of the gas-sealing sleeve 1 close to the gas-sealing disk 3 is provided with a plurality of annular grooves 6, and the labyrinth structure 4 includes a labyrinth body 12 and a plurality of annular protrusions 7 provided on the labyrinth body 12, the annular grooves 6 correspond to the annular protrusions 7 in position, the annular protrusions 7 are located in the annular grooves 6, and there is a gap between the annular protrusions 7 and the annular grooves 6 for the protective gas to pass through. The annular grooves and the annular protrusions 7 can be provided with two or three, and the number of the annular grooves and the annular protrusions can be set according to actual needs. More specifically, a sealing ring 8 is provided between the gas-sealing disk 3 and the gas-sealing sleeve 1, one end of the sealing ring 8 is tightly connected to the gas-sealing disk 3, the other end of the sealing ring 8 is gap-matched with the gas-sealing sleeve, and the sealing ring 8 is tightly matched with the labyrinth structure 4.

[0024] In some embodiments, a wear-resistant sleeve 9 is provided between the main shaft 2 and the air seal plate 3. The wear-resistant sleeve 9 is sleeved on the outer surface of the main shaft 2 and is tightly connected to the main shaft 2. At least one oil seal 10 is provided between the wear-resistant sleeve 9 and the air seal plate 3. The oil seal 10 is a heat-resistant grease oil seal 10, which plays a role in lubricating and cooling the rotating parts. Figure 3As shown, in this embodiment, three oil seals 10 are arranged between the wear-resistant sleeve 9 and the gas seal plate 3, and two adjacent oil seals 10 are arranged back to back. More specifically, the oil seal 10 is U-shaped.

[0025] On the basis of the above, the gas seal disc 3 is provided with an oil inlet hole 11 and an oil outlet hole, and the lubricating oil enters the gas seal disc 3 from the oil inlet hole 11 and is discharged from the oil outlet hole through the oil seal 10. Since the rotation speed of the main shaft 2, the gas seal sleeve 1 and the gas seal disc 3 is relatively high, the lubricating oil enters the gas seal disc 3 from the oil inlet hole 11 and passes through the oil seal 10 to lubricate the main shaft 2, the wear-resistant sleeve 9 and the gas seal sleeve 1, and cools the rotating parts (including the main shaft 2, the gas seal sleeve 1 and the wear-resistant sleeve 9), which can extend the service life of the rotating parts.

[0026] It should be understood that the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A gas sealing device, characterized in that: The invention comprises an air-sealing sleeve (1), wherein the air-sealing sleeve (1) is sleeved on the outer surface of a main shaft (2) and is tightly connected to the main shaft (2); an air-sealing disk (3) is arranged on one side of the air-sealing sleeve (1), wherein the air-sealing disk (3) is sleeved on the outer surface of the main shaft (2); a labyrinth structure (4) is arranged between the air-sealing sleeve (1) and the air-sealing disk (3); one end of the labyrinth structure (4) is connected to the air-sealing disk (3), and the other end of the labyrinth structure (4) is loosely matched with the air-sealing sleeve (1); an air inlet (5) and an air outlet are arranged on the air-sealing disk (3); protective gas enters the air-sealing disk (3) from the air inlet (5), passes through the labyrinth structure (4), and enters a mixing barrel from the air outlet.

2. The air sealing device according to claim 1, characterized in that: A plurality of annular grooves (6) are arranged at one end of the gas seal sleeve (1) close to the gas seal disk (3); the labyrinth structure (4) comprises a labyrinth body (12) and a plurality of annular protrusions (7) arranged on the labyrinth body (12); the annular grooves (6) correspond to the annular protrusions (7) in position; the annular protrusions (7) are located in the annular grooves (6) and there is a gap between the annular protrusions (7) and the annular grooves (6) for the protective gas to pass through.

3. The air sealing device according to claim 2, characterized in that: A sealing ring (8) is provided between the air sealing disk (3) and the air sealing sleeve (1); one end of the sealing ring (8) is tightly connected to the air sealing disk (3), the other end of the sealing ring (8) is loosely matched with the air sealing sleeve, and the sealing ring (8) is tightly matched with the labyrinth structure (4).

4. The air sealing device according to claim 1, characterized in that: A wear-resistant sleeve (9) is provided between the main shaft (2) and the air seal plate (3); the wear-resistant sleeve (9) is sleeved on the outer surface of the main shaft (2) and is tightly connected to the main shaft (2); and at least one oil seal (10) is provided between the wear-resistant sleeve (9) and the air seal plate (3).

5. The air sealing device according to claim 4, characterized in that: A plurality of oil seals (10) are arranged between the wear-resistant sleeve (9) and the air seal plate (3), and two adjacent oil seals (10) are arranged opposite to each other.

6. The air sealing device according to claim 5, characterized in that: The oil seal (10) is U-shaped.

7. The air sealing device according to claim 3, characterized in that: The air seal plate (3) is provided with an oil inlet hole (11) and an oil outlet hole. Lubricating oil enters the air seal plate (3) through the oil inlet hole (11), passes through the oil seal (10), and is discharged from the oil outlet hole.

8. The air sealing device according to claim 1, characterized in that: The gas seal sleeve (1) is connected to the main shaft (2) via a first key.

9. The air sealing device according to claim 1, characterized in that: The air sealing disk (3) is connected to the main shaft (2) via a second key.

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