CN212225993U

CN212225993U - Oil-proof and dust-proof sealing device

Info

Publication number: CN212225993U
Application number: CN202020692814.7U
Authority: CN
Inventors: 邓能华
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-12-25
Anticipated expiration: 2030-04-30

Abstract

The utility model provides an oil-proof and dust-proof sealing device, which consists of a movable ring and a stationary ring, wherein the section of the movable ring is integrally U-shaped, and consists of a first movable ring and a second movable ring which are arranged along the radial direction and a movable connecting ring which is arranged along the axial direction, and the movable connecting ring is sleeved on a main shaft and is tightly fixed on the main shaft through a throat hoop; the static ring at least comprises a static connecting ring arranged along the axial direction, and a fixing ring, a first static ring and a second static ring which are arranged along the radial direction, wherein the fixing ring is attached to the side wall of the end cover and is fixedly connected with the end cover through a bolt, and the inner side of the second static ring is provided with a dust lip with an arc-shaped section along the radial direction; and sealing lips which incline outwards are arranged on the side walls of the first movable ring and the second movable ring. The device can carry out better sealed to the cavity that contains lubricating grease between main shaft and the box, prevents that external dust from getting into sealed intracavity, and its simple structure, life are permanent.

Description

Oil-proof and dust-proof sealing device

Technical Field

The utility model provides a sealing device especially provides one kind and is arranged in main shaft or the rotation barrel to main shaft or rotate the barrel and seal dirt-proof sealing device, belongs to mechanical seal technical field.

Background

The labyrinth seal is a device which is provided with a plurality of annular seal teeth arranged in sequence around a main shaft, a series of cut-off gaps and expansion cavities are formed between the teeth, and the purpose of leakage resistance is achieved by the throttling effect generated when the sealed medium passes through the gaps of the zigzag labyrinth. The labyrinth seal has no solid contact because of the clearance between the rotor and the casing, and allows thermal expansion, so that the labyrinth seal is suitable for occasions of high temperature, high pressure and high rotating speed frequency, and is widely used for sealing shaft ends and stages of steam turbines, gas turbines, compressors and blowers.

In some occasions with strict use requirements, the sealing device not only needs to achieve zero leakage of lubricating oil in the sealing cavity, but also can achieve the purpose of preventing external pollutants such as dust from entering the inside of the sealing cavity when in use, and in addition, the sealing device also has higher requirements on the service life of the sealing element.

The sealing devices in the prior art are more in variety, complicated or simple in structure, and different in sealing performance. In general, however, it would be desirable to provide a seal assembly that is simple in construction, has good sealing properties, and has a long useful life.

Disclosure of Invention

The utility model discloses the needle provides a grease proofing dust sealing device, the device can carry out better sealed to the cavity that contains lubricating grease between main shaft and the end cover, prevents that external dust from getting into sealed intracavity, and its simple structure, simple to operate, easy to maintain, life are permanent.

Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:

an oil-proof and dust-proof sealing device is arranged between a main shaft and an end cover, the main shaft is arranged in the end cover and extends out of the end cover, a gap between the interior of the end cover and the main shaft is a sealing cavity, the oil-proof and dust-proof sealing device is composed of a movable ring and a static ring, the section of the movable ring is integrally U-shaped and composed of a first movable ring and a second movable ring which are arranged along the radial direction and a movable connecting ring which is arranged along the axial direction, and the movable connecting ring is sleeved on the main shaft and is tightly fixed on the main shaft through a throat hoop;

the static ring at least comprises a static connecting ring arranged along the axial direction, and a fixing ring, a first static ring and a second static ring which are arranged along the radial direction, wherein the fixing ring is arranged on the outer circumference of the left end of the static connecting ring; all be provided with the sealing lip of outwards inclining on the lateral wall of first rotating ring and second rotating ring, the contained angle between sealing lip and first rotating ring or the second rotating ring is 30 ~ 60.

And sealant is filled between the movable connecting ring and the main shaft.

And an annular micro-convex structure is arranged on the side wall of the fixed ring, which is in contact with the end cover.

Compared with the prior art, the utility model provides a grease proofing dustproof sealing device has following advantage: 1. the utility model discloses simple structure, through the cooperation of alternating between rotating ring and the quiet ring, the interior disc of dustproof lip closely laminates on the main shaft to this isolated external dust gets into, forms first defence line, because the dustproof lip is the arc structure and keeps the elasticity laminating state, even consequently when the dustproof lip has produced certain wearing and tearing back, the dustproof lip also can keep laminating with the main shaft, maintains better dust sealing effect. 2. All be provided with a plurality of lips of slope outwards on the lateral wall of first rotating ring and second rotating ring, the contained angle between lips and first rotating ring or the second rotating ring is 30 ~ 60, and above-mentioned lips can play good sealed effect, and is dustproof grease proofing. 3. The utility model discloses in be provided with annular little protruding structure in the stationary ring on the lateral wall that contacts with the end cover, this is because the situation of unevenness can appear often to the equipment end cover, consequently has when stationary ring and equipment end cover laminating to probably lead to the gap to appear between the two, leads to the grease to leak or the dust gets into sealed chamber. Through setting up little protruding structure, utilize the elasticity and the ductility of little protruding structure self, consequently can be better with the laminating of equipment end cover, form the sealing line.

Drawings

Fig. 1 is a schematic view of the overall structure of the oil-proof and dust-proof sealing device provided by the present invention;

in the figure: 1-end cover, 2-main shaft, 3-sealing cavity, 4-first movable ring, 5-second movable ring, 6-movable connecting ring, 7-throat hoop, 8-fixed ring, 9-first stationary ring, 10-second stationary ring, 11-dust-proof lip, 12-sealing lip, 13-sealant, 14-micro-convex structure and 15-stationary connecting ring.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The utility model provides an oil proofing dust sealing device's overall structure is shown in figure 1, installs between main shaft 2 and end cover 1, the main shaft is installed in the end cover and is stretched out from the end cover, and the space between the inside and main shaft of end cover is sealed chamber 3, oil proofing dust sealing device comprises rotating ring and quiet ring, and the cross-section of rotating ring is whole to be the U style of calligraphy, comprises along the first rotating ring 4, the second rotating ring 5 of radial setting and the moving connecting ring 6 that sets up along the axial, move the connecting ring cover and tighten through larynx hoop 7 and be fixed in on the main shaft, it has sealed glue 13 to fill between connecting ring and the main shaft.

The static ring at least comprises a static connecting ring 15 arranged along the axial direction, a fixing ring 8, a first static ring 9 and a second static ring 10 which are arranged along the radial direction, the fixing ring is arranged on the outer circumference of the left end of the static connecting ring, the first static ring is arranged on the inner circumference of the middle part of the static connecting ring, the second static ring is arranged on the inner circumference of the right end of the static connecting ring, the fixing ring is attached to the side wall of the end cover and is connected and fixed with the end cover through bolts, and an annular micro-convex structure 14 is arranged on the side wall, in the fixing ring, in contact with the end cover, of the end cover, so that the fixed ring and the end cover of the equipment are often uneven, and gaps can be possibly formed between the fixed ring and the. Through setting up little protruding structure, utilize the elasticity and the ductility of little protruding structure self, consequently can be better with the laminating of equipment end cover, form the sealing line.

The first static ring is located between the first movable ring and the second movable ring, the second static ring is located on the right side of the second movable ring, the inner side of the second static ring is provided with a dustproof lip 11 with an arc-shaped cross section along the radial direction, the inner circular surface of the dustproof lip is tightly attached to the spindle and keeps an elastic attachment state, so that external dust is isolated from entering, a first defense line is formed, and the dustproof lip is of an arc-shaped structure and keeps the elastic attachment state, so that the dustproof lip can be attached to the spindle even when the dustproof lip is abraded to a certain degree, and a good dustproof sealing effect is maintained. All be provided with the seal lip 12 of outwards inclining on the lateral wall of first rotating ring and second rotating ring, the contained angle between seal lip and first rotating ring or the second rotating ring is 30 ~ 60, and above-mentioned seal lip can play good sealed effect, and is dustproof grease proofing.

Claims

1. The utility model provides an grease proofing dust sealing device, installs between main shaft and end cover, the main shaft is installed in the end cover and is stretched out from the end cover, and the space between the inside and the main shaft of end cover is sealed chamber, its characterized in that: the oil-proof and dust-proof sealing device consists of a movable ring and a static ring, the section of the movable ring is integrally U-shaped and consists of a first movable ring, a second movable ring and a movable connecting ring, the first movable ring and the second movable ring are arranged along the radial direction, the movable connecting ring is arranged along the axial direction, and the movable connecting ring is sleeved on the main shaft and is tightly fixed on the main shaft through a throat hoop;

2. The oil-and dust-proof sealing device according to claim 1, characterized in that: and sealant is filled between the movable connecting ring and the main shaft.

3. The oil-and dust-proof sealing device according to claim 1, characterized in that: and an annular micro-convex structure is arranged on the side wall of the fixed ring, which is in contact with the end cover.