CN210890095U

CN210890095U - Bidirectional multi-lip sealing device for rotating shaft

Info

Publication number: CN210890095U
Application number: CN201921386955.XU
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 a two-way multi-lip sealing device for a rotating shaft, which consists of a movable ring and a static ring, wherein the section of the static ring is L-shaped and consists of a static connecting ring arranged axially and a static sealing ring arranged radially, the static connecting ring is positioned in an end cover and is fixed with the end cover through interference fit, the static sealing ring is arranged inwards along the radial direction, and a sealing lip A is obliquely arranged on the inner circumference of the static sealing ring; the section of the movable ring is in an inverted L shape and consists of a movable connecting ring arranged axially and a movable sealing ring arranged radially, the movable connecting ring is sleeved on the rotating shaft and is fixed with the rotating shaft through interference fit, the movable sealing ring is arranged outwards in the radial direction, and a sealing lip B is obliquely arranged on the outer circumference of the movable sealing ring; the sealing lip A is in contact sealing with the outer circular surface of the movable connecting ring, and the sealing lip B is in contact sealing with the inner circular surface of the static connecting ring. 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

Bidirectional 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 a two-way many lips 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:

a bidirectional 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 inner part of the end cover and the rotating shaft is a sealing cavity, the bidirectional multi-lip sealing device for the rotating shaft is composed of a movable ring and a static ring, the section of the static ring is L-shaped and is composed of a static connecting ring arranged axially and a static sealing ring arranged radially, the static connecting ring is positioned in the end cover and is fixed with the end cover through interference fit, the static sealing ring is arranged inwards in the radial direction, and a sealing lip A is obliquely arranged on the inner circumference of the static sealing ring;

the section of the movable ring is in an inverted L shape and consists of a movable connecting ring arranged axially and a movable sealing ring arranged radially, the movable connecting ring is sleeved on the rotating shaft and is fixed with the rotating shaft through interference fit, the movable sealing ring is arranged outwards in the radial direction, and a sealing lip B is obliquely arranged on the outer circumference of the movable sealing ring; the sealing lip A is in contact sealing with the outer circular surface of the movable connecting ring, and the sealing lip B is in contact sealing with the inner circular surface of the static connecting ring.

And the sealing lips A and B are respectively provided with an annular spring piece with a V-shaped section.

And the inner circumference of the static sealing ring is also provided with an auxiliary sealing lip A, the outer circumference of the dynamic sealing ring is also provided with an auxiliary sealing lip B, the auxiliary sealing lip A is in contact sealing with the outer circular surface of the dynamic connecting ring, and the auxiliary sealing lip B is in contact sealing with the inner circular surface of the static connecting ring.

And the dynamic ring and the static ring are both provided with frameworks made of metal materials.

One end of the static connecting ring, which is far away from the static sealing ring, is provided with a raised limiting step inwards along the radial direction, and one end of the movable connecting ring, which is far away from the movable sealing ring, is provided with a raised limiting step outwards along the radial direction.

Compared with the prior art, the utility model provides a two-way many lips sealing device for axis of rotation has following advantage: 1. the utility model discloses simple structure, through the cooperation between rotating ring and the quiet ring, seal lip A is sealed with the outer disc contact of rotating ring, and seal lip B is sealed with the interior disc contact of quiet go-between, in addition vice seal lip's is sealed 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 cyclic annular spring leaf that the cross-section is the V type to embed in seal lip, make seal lip A and seal lip B remain the expansion state throughout, even if lead to seal lip to produce wearing and tearing through long-time use, because the expansion elasticity of cyclic annular spring leaf also can make seal lip A hug closely on the outer disc that moves the go-between, make seal lip B hug closely on the interior disc of quiet go-between to guarantee sealed effect.

Drawings

Fig. 1 is a schematic overall structure diagram of a bidirectional 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-static connecting ring, 5-static sealing ring, 6-sealing lip A, 7-dynamic connecting ring, 8-dynamic sealing ring, 9-sealing lip B, 10-spring leaf, 11-auxiliary sealing lip A, 12-auxiliary sealing lip B, 13-framework and 14-limiting step.

Detailed Description

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

The utility model provides a two-way many lips sealing device's for axis of rotation overall structure 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, a two-way many lips sealing device for axis of rotation comprises rotating ring and quiet ring, all be provided with metal material's skeleton 13 in rotating ring and the quiet ring.

The section of the static ring is L-shaped, and the static ring is composed of a static connecting ring 4 arranged axially and a static sealing ring 5 arranged radially, the static connecting ring is positioned in the end cover and fixed with the end cover through interference fit, the static sealing ring is arranged inwards in the radial direction, and a sealing lip A6 is obliquely arranged on the inner circumference of the static sealing ring; and one end of the static connecting ring far away from the static sealing ring is provided with a raised limiting step 14 inwards along the radial direction.

The section of the movable ring is in an inverted L shape and consists of a movable connecting ring 7 arranged axially and a movable sealing ring 8 arranged radially, the movable connecting ring is sleeved on the rotating shaft and is fixed with the rotating shaft through interference fit, the movable sealing ring is arranged outwards in the radial direction, and a sealing lip B9 is obliquely arranged on the outer circumference of the movable sealing ring; one end of the movable connecting ring far away from the movable sealing ring is provided with a raised limiting step 14 outwards along the radial direction. The sealing lip A is in contact sealing with the outer circular surface of the movable connecting ring, and the sealing lip B is in contact sealing with the inner circular surface of the static connecting ring. The seal lips A and B are both provided with an annular spring piece 10 with a V-shaped section. The utility model discloses in there being the cyclic annular spring leaf that the cross-section is the V type to embed in seal lip, make seal lip A and seal lip B remain the expansion state throughout, even if lead to seal lip to produce wearing and tearing through long-time use, because the expansion elasticity of cyclic annular spring leaf also can make seal lip A hug closely on the outer disc that moves the go-between, make seal lip B hug closely on the interior disc of quiet go-between to guarantee sealed effect.

And the inner circumference of the static sealing ring is also provided with an auxiliary sealing lip A11, the outer circumference of the dynamic sealing ring is also provided with an auxiliary sealing lip B12, the auxiliary sealing lip A is in contact sealing with the outer circular surface of the dynamic connecting ring, and the auxiliary sealing lip B is in contact sealing with the inner circular surface of the static connecting ring. The utility model discloses a cooperation between rotating ring and the quiet ring, seal lip A is sealed with the outer disc contact of rotating ring, and seal lip B is sealed with the interior disc contact of quiet go-between, in addition the sealing of vice seal lip to realize good sealed effect.

Claims

1. A two-way 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 bidirectional multi-lip sealing device for the rotating shaft comprises a moving ring and a static ring, wherein the section of the static ring is L-shaped and comprises a static connecting ring arranged axially and a static sealing ring arranged radially, the static connecting ring is positioned in the end cover and fixed with the end cover through interference fit, the static sealing ring is arranged inwards in the radial direction, and a sealing lip A is obliquely arranged on the inner circumference of the static sealing ring;

2. The bi-directional multi-lip seal for a rotating shaft according to claim 1, wherein: and the sealing lips A and B are respectively provided with an annular spring piece with a V-shaped section.

3. The bi-directional multi-lip seal for a rotating shaft according to claim 1, wherein: and the inner circumference of the static sealing ring is also provided with an auxiliary sealing lip A, the outer circumference of the dynamic sealing ring is also provided with an auxiliary sealing lip B, the auxiliary sealing lip A is in contact sealing with the outer circular surface of the dynamic connecting ring, and the auxiliary sealing lip B is in contact sealing with the inner circular surface of the static connecting ring.

4. The bi-directional multi-lip seal for a rotating shaft according to claim 1, wherein: and the dynamic ring and the static ring are both provided with frameworks made of metal materials.

5. The bi-directional multi-lip seal for a rotating shaft according to claim 1, wherein: one end of the static connecting ring, which is far away from the static sealing ring, is provided with a raised limiting step inwards along the radial direction, and one end of the movable connecting ring, which is far away from the movable sealing ring, is provided with a raised limiting step outwards along the radial direction.