Roller seal device in a special working environment

Abstract

The application discloses a roller sealing device in special working environment and belongs to the technical field of roller sealing. The device comprises a roller, a supporting plate, a sealing groove body, a common steel bearing, a sealing end cover, a flange type polytetrafluoroethylene bellows, an O-shaped ring and a skeleton oil seal. The sealing device can adapt to special working environments such as high temperature, corrosive gas or liquid, has a simple structure, saves installation space, reduces cost, and has long service life because the bearing is arranged outside the special environment.

Description

Technical Field

[0001] The invention belongs to the technical field of roller sealing, and relates to a sealing device for a roller in a special environment. Background Art

[0002] Rollers are essential components of film production. Most rollers are exposed to the air and require no sealing. However, in certain operating environments (such as high temperatures, corrosive gases, or liquids), roller sealing becomes particularly important. Currently, there are two types of roller sealing methods: one is complete isolation through magnetic couplings, with corrosion-resistant ceramic bearings selected for these environments; the other is replacing the magnetic coupling seal with a skeleton oil seal, with corrosion-resistant ceramic bearings also selected for these environments. The disadvantages of both of these solutions are high cost and a short lifespan for the ceramic bearings, requiring regular replacement. Summary of the Invention

[0003] In order to solve the above problems in the prior art, the present invention proposes a roller sealing device for special working environments.

[0004] The technical solution of the present invention is:

[0005] A roller sealing device for special working environment includes a roller 1, a support plate 2, a sealing tank 3, a common steel bearing 4, a sealing end cover 5, a flanged polytetrafluoroethylene bellows 6, an O-ring 7 and a skeleton oil seal 8.

[0006] The sealing tank 3 covers the roller 1 therein, thereby achieving sealing of the roller 1 in special working environments such as high temperature, corrosive gas or liquid.

[0007] The support plate 2 is installed on the outside of the sealing tank body 3, and the shaft head of the roller 1 passes through the sealing tank body 3 and is installed on the support plate 2 through an ordinary steel bearing 4.

[0008] The flange-type polytetrafluoroethylene bellows 6 is sleeved on the roller shaft, and its two ends are connected to the support plate 2 and the sealing groove body 3 respectively through bolts and pressure plates to form a static seal on the outer side of the roller.

[0009] The sealing end cover 5 is installed in the flange type polytetrafluoroethylene bellows 6 and is located on the inner side of the support plate 2. An O-ring 7 is provided on the end surface in contact with the support plate 2 to play a static sealing role, and a skeleton oil seal 8 is provided on the inner cylindrical surface in contact with the roller shaft head to play a dynamic sealing role.

[0010] The O-ring 7 and the skeleton oil seal 8 are both made of fluororubber.

[0011] The beneficial effects of the present invention are as follows: the roller sealing device of the present invention can adapt to special working environments, has a simple structure, saves installation space, and reduces costs; and the bearing is arranged outside the special environment and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the roller sealing device of the present invention.

[0013] In the figure: 1 roller; 2 support plate; 3 sealing tank; 4 ordinary steel bearing; 5 sealing end cover; 6 flange type polytetrafluoroethylene bellows; 7 O-ring; 8 skeleton oil seal. DETAILED DESCRIPTION

[0014] The following examples and drawings further explain the specific embodiments of the present invention, but are not intended to limit the present invention.

[0015] like Figure 1 As shown, a sealing device for a roller in a special working environment includes a roller 1, a support plate 2, a sealing tank 3, a common steel bearing 4, a sealing end cover 5, a flange-type polytetrafluoroethylene bellows 6, an O-ring 7 and a skeleton oil seal 8.

[0016] The main body of the roller 1 is installed in the sealing tank 3 to achieve the sealing of the roller 1 in special working environments such as high temperature, corrosive gas or liquid.

[0017] The support plate 2 is fixed and leveled outside the sealing tank body 3 , and the shaft head of the roller 1 passes through the sealing tank body 3 and is installed on the support plate 2 through an ordinary steel bearing 4 .

[0018] The flange-type polytetrafluoroethylene bellows 6 is sleeved on the roller shaft, and its two ends are connected to the support plate 2 and the sealing groove body 3 respectively through bolts and pressure plates to form a static seal on the outer side of the roller.

[0019] The sealing end cover 5 is installed in the flange-type polytetrafluoroethylene bellows 6 and is located on the inner side of the support plate 2. An O-ring 7 is provided on the end surface thereof in contact with the support plate 2 to play a static sealing role, and a skeleton oil seal 8 is provided on the inner cylindrical surface in contact with the roller shaft head to play a dynamic sealing role; thereby achieving the purpose of isolating the special environment in the sealing tank from the outside world.

[0020] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A roller sealing device for special working environment, characterized in that: The device comprises a roller (1), a support plate (2), a sealing tank (3), a common steel bearing (4), a sealing end cover (5) and a flange-type polytetrafluoroethylene bellows (6); The sealing tank (3) covers the roller (1) therein, thereby achieving sealing of the roller (1) in a special working environment; The support plate (2) is mounted on the outside of the sealing tank body (3); the shaft head of the roller (1) passes through the sealing tank body (3) and is mounted on the support plate (2) via a common steel bearing (4); The flange-type polytetrafluoroethylene bellows (6) is sleeved on the roller shaft, and its two ends are respectively connected to the support plate (2) and the sealing groove body (3) to form a static seal on the outer side of the roller; The sealing end cover (5) is installed in a flange-type polytetrafluoroethylene bellows (6) and is located on the inner side of the support plate (2); an O-ring (7) is provided on the end surface of the sealing end cover (5) in contact with the support plate (2), which plays a static sealing role; and a skeleton oil seal (8) is provided on the inner cylindrical surface of the sealing end cover (5) in contact with the roller shaft head, which plays a dynamic sealing role.

2. The roller sealing device for special working environment according to claim 1, characterized in that: Both ends of the flange-type polytetrafluoroethylene bellows (6) are connected to the support plate (2) and the sealing tank body (3) respectively through bolts and a pressure plate.

3. The roller sealing device for special working environment according to claim 1, characterized in that: The O-ring (7) and the skeleton oil seal (8) are both made of fluororubber.

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