CN210890099U

CN210890099U - Axial multi-lip sealing device for rotating shaft

Info

Publication number: CN210890099U
Application number: CN201921386933.3U
Authority: CN
Inventors: 邓伦胜; 章宏清
Original assignee: JIANGMEN XINHUI SEALING TECHNOLOGY CO LTD
Current assignee: Guangdong Xinhui Technology Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-06-30
Anticipated expiration: 2029-08-26

Abstract

The utility model provides an axial many lips sealing device for axis of rotation, by rotating ring and quiet ring composition, the cross-section of quiet ring is the C style of calligraphy, by the interior quiet ring of axial setting, outer quiet ring and the quiet go-between of radial setting constitute, outer quiet ring is located the end cover and fixes mutually with the end cover through interference fit, the cross-section of rotating ring is the anti-C style of calligraphy, by the main ring of axial setting, many lips sealing ring and the moving go-between of radial setting, the inside of rotating ring is provided with the skeleton that the cross-section is the anti-C style of calligraphy; the main ring is sleeved on the rotating shaft and fixed with the rotating shaft through interference fit, and the left end of the multi-lip sealing ring is provided with a sealing lip with an X-shaped section. The device can carry out better sealed to the cavity that contains lubricating grease between axis of rotation and the box, and its simple structure, simple to operate, easy to maintain, life are permanent.

Description

Axial multi-lip sealing device for rotating shaft

Technical Field

The utility model provides a sealing device especially provides a sealing device who is arranged in the axis of rotation to seal the axis of rotation, 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 rotating 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 needs to achieve the purpose of preventing external pollutants from entering the sealing cavity, 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 an axial lip sealing device for axis of rotation, and the device can carry out better sealed to the cavity that contains lubricating grease between axis of rotation and the box, 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 axial multi-lip sealing device for a rotating shaft is arranged between the rotating shaft and an end cover, the rotating shaft is arranged in the end cover and extends out of the end cover, a gap between the inside of the end cover and the rotating shaft is a sealing cavity, the axial multi-lip sealing device for the rotating shaft is composed of a movable ring and a static ring, the cross section of the static ring is C-shaped and composed of an inner static ring, an outer static ring and a static connecting ring, the inner static ring and the outer static ring are axially arranged, and the outer static ring is located in the end cover and fixed with the end cover through interference fit;

the section of the movable ring is in an inverted C shape and consists of a main ring, a multi-lip sealing ring and a movable connecting ring which are axially arranged, wherein the movable connecting ring is radially arranged, and a framework with an inverted C-shaped section is arranged inside the movable ring; the main ring is sleeved on the rotating shaft and is fixed with the rotating shaft through interference fit, and the left end of the multi-lip sealing ring is provided with a sealing lip with an X-shaped section; the movable ring and the static ring are alternately inserted, the multi-lip sealing ring in the movable ring is positioned between the inner static ring and the outer static ring in the static ring, and the sealing lips are tightly contacted and sealed with the inner static ring and the outer static ring.

And an inclined auxiliary sealing lip is arranged outwards along the radial direction of the outer circular surface of the main ring in the movable ring, and the auxiliary sealing lip is tightly contacted and sealed with the inner side surface of the inner static ring.

The sealing lip is internally provided with an annular spring piece with a V-shaped section, the spring piece is fixed at the end part of the sealing lip, and the sealing lip is always kept in a close-fitting state with the inner static ring and the outer static ring under the expansion action of the spring piece.

Compared with the prior art, the utility model provides an axial many lips sealing device for axis of rotation has following advantage: 1. the utility model discloses simple structure, through the cooperation of alternating between rotating ring and the quiet ring, the sealing lip that sets up on the rotating ring is sealed with the intimate contact between the quiet ring, in addition the sealing between vice sealing lip and the quiet ring to realize good sealed effect. 2. The utility model discloses well rotating ring all adopts interference fit and axis of rotation and end cover to fix with quiet ring, consequently installs and maintains the convenience. 3. The utility model discloses in there being the annular spring leaf that the cross-section is the V type to embed in seal lip, make seal lip and interior quiet ring and outer quiet ring remain throughout to hug closely the state, even if lead to seal lip to produce wearing and tearing through long-time use, because the expansion elasticity of annular spring leaf also can make seal lip hug closely on quiet ring to guarantee sealed effect.

Drawings

Fig. 1 is a schematic overall structural view of an axial multi-lip sealing device for a rotating shaft according to the present invention;

in the figure: 1-end cover, 2-rotating shaft, 3-sealing cavity, 4-inner static ring, 5-outer static ring, 6-static connecting ring, 7-main ring, 8-multi-lip sealing ring, 9-dynamic connecting ring, 10-framework, 11-sealing lip, 12-auxiliary sealing lip and 13-spring piece.

Detailed Description

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

The utility model provides an overall structure for axial many lips sealing device of axis of rotation is shown in figure 1, installs between axis of rotation 2 and end cover 1, the axis of rotation is installed in the end cover and is stretched out from the end cover, and the space between the inside and the axis of rotation of end cover is sealed chamber 3, an axial many lips sealing device for axis of rotation comprises rotating ring and quiet ring, and the cross-section of quiet ring is the C style of calligraphy, comprises interior quiet ring 4, outer quiet ring 5 of axial setting and the quiet go-between 6 of radial setting, outer quiet ring is located the end cover and fixes mutually with the end cover through interference fit.

The section of the movable ring is reverse C-shaped, and the movable ring consists of a main ring 7 arranged axially, a multi-lip sealing ring 8 and a movable connecting ring 9 arranged radially, and a framework 10 with a reverse C-shaped section and a supporting function is arranged inside the movable ring; the main ring is sleeved on the rotating shaft and is fixed with the rotating shaft through interference fit, and the left end of the multi-lip sealing ring is provided with a sealing lip 11 with an X-shaped section; the movable ring and the static ring are inserted in a staggered mode, the multi-lip sealing ring in the movable ring is located between the inner static ring and the outer static ring in the static ring, the sealing lips are in close contact sealing with the inner static ring and the outer static ring, the sealing lips are internally provided with an annular spring piece 13 with a V-shaped section, the spring piece is fixed at the end portion of the sealing lips, and the sealing lips, the inner static ring and the outer static ring are always kept in a close-fitting state under the expansion effect of the spring piece. And an inclined auxiliary sealing lip 12 is arranged outwards along the radial direction on the outer circular surface of the main ring in the movable ring, and the auxiliary sealing lip is tightly contacted and sealed with the inner side surface of the inner static ring. In the embodiment, two secondary sealing lips are arranged, and the two secondary sealing lips are inclined in opposite directions.

Claims

1. An axial multi-lip sealing device for a rotating shaft is arranged between the rotating shaft and an end cover, the rotating shaft is arranged in the end cover and extends out of the end cover, and a gap between the inside of the end cover and the rotating shaft is a sealing cavity and is characterized in that: the axial multi-lip sealing device for the rotating shaft comprises a moving ring and a static ring, wherein the section of the static ring is C-shaped and comprises an inner static ring, an outer static ring and a static connecting ring, the inner static ring and the outer static ring are axially arranged, the static connecting ring is radially arranged, and the outer static ring is positioned in the end cover and is fixed with the end cover through interference fit;

2. The axial multi-lip seal for a rotating shaft of claim 1 wherein: and an inclined auxiliary sealing lip is arranged outwards along the radial direction of the outer circular surface of the main ring in the movable ring, and the auxiliary sealing lip is tightly contacted and sealed with the inner side surface of the inner static ring.

3. The axial multi-lip seal for a rotating shaft of claim 1 wherein: the sealing lip is internally provided with an annular spring piece with a V-shaped section, the spring piece is fixed at the end part of the sealing lip, and the sealing lip is always kept in a close-fitting state with the inner static ring and the outer static ring under the expansion action of the spring piece.