CN210890110U

CN210890110U - Main shaft sealing device of wind generating set

Info

Publication number: CN210890110U
Application number: CN201921506042.7U
Authority: CN
Inventors: 邓伦胜; 章宏清
Original assignee: Jiangmen Xinhui Special Seal Technology Co ltd
Current assignee: Jiangmen Xinhui Special Seal Technology Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-06-30
Anticipated expiration: 2029-09-11

Abstract

The utility model provides a wind generating set main shaft sealing device, by the rotating ring and the quiet ring is constituteed, the cross-section of rotating ring is C style of calligraphy, by the interior rotating ring of axial setting, outer rotating ring and the radial moving connecting ring of setting, interior rotating ring cover is on the main shaft and fixed mutually with the main shaft through interference fit, the cross-section of quiet ring is anti-C style of calligraphy, by the main ring of axial setting, many lips sealing ring and the radial quiet connecting ring of setting constitute, the inside of quiet ring is provided with the skeleton that the cross-section is anti-C style of calligraphy; the main ring is located the end cover and fixed mutually with the end cover through interference fit, and the left end of many lips sealing ring is provided with the seal lip, and the seal lip comprises the outer seal lip that the cross-section is the V type and the interior seal lip that the cross-section is the type of falling V. The device can carry out better sealed to the cavity that contains lubricating grease between main shaft and the box, and its simple structure, simple to operate, easy to maintain, life are permanent.

Description

Main shaft sealing device of wind generating set

Technical Field

The utility model provides a sealing device especially provides a sealing device who is arranged in wind generating set to seal up the main shaft, 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 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 a needle provides a wind generating set main shaft sealing device, the device can carry out better sealed to the cavity that contains lubricating grease between main shaft and the end cover, 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 main shaft sealing device of a wind generating set 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 main shaft sealing device of the wind generating set consists of a movable ring and a static ring, the section of the movable ring is C-shaped and consists of an inner movable ring, an outer movable ring and a movable connecting ring which are arranged in the axial direction, the inner movable ring is sleeved on the main shaft and is fixed with the main shaft through interference fit;

the section of the static ring is in an inverted C shape and consists of a main ring, a multi-lip sealing ring and a static connecting ring which are arranged in the radial direction, wherein a framework with an inverted C-shaped section is arranged in the static ring; the main ring is positioned in the end cover and is fixed with the end cover through interference fit, the left end of the multi-lip sealing ring is provided with a sealing lip, and the sealing lip consists of an outer sealing lip with a V-shaped section and an inner sealing lip with an inverted V-shaped section; the movable ring and the static ring are alternately inserted, the multi-lip sealing ring in the static ring is positioned between the inner movable ring and the outer movable ring in the movable ring, the outer sealing lip is tightly contacted and sealed with the outer movable ring, and the inner sealing lip is tightly contacted and sealed with the inner movable ring.

The inner circular surface of the main ring in the static ring is provided with an inclined auxiliary sealing lip inwards along the radial direction, and the auxiliary sealing lip is tightly contacted and sealed with the outer side surface of the outer moving 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 movable ring and the outer movable ring under the expansion action of the spring piece.

Compared with the prior art, the utility model provides a wind generating set main shaft 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 sealing lip that sets up on the quiet ring is sealed with the intimate contact between the rotating ring, in addition the sealing between vice sealing lip and the rotating ring to realize good sealed effect. 2. The utility model discloses rotating ring and quiet ring all adopt interference fit to fix with main shaft and end cover, consequently the installation is convenient with the maintenance. 3. The utility model discloses in be provided with the cyclic annular spring leaf that the cross-section is the V type in the seal lip, the spring leaf is fixed in the tip of seal lip, makes seal lip and interior rotating ring and outer rotating ring remain throughout and hugs closely the state, even if lead to the seal lip to produce wearing and tearing through long-time use, because the expansion elasticity of spring leaf also can make the seal lip closely paste on the rotating ring to guarantee sealed effect.

Drawings

Fig. 1 is a schematic view of the overall structure of the main shaft sealing device of the wind generating set provided by the present invention;

in the figure: 1-end cover, 2-main shaft, 3-sealing cavity, 4-inner dynamic ring, 5-outer dynamic ring, 6-dynamic connecting ring, 7-main ring, 8-multi-lip sealing ring, 9-static 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 a wind generating set main shaft 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, wind generating set main shaft sealing device comprises rotating ring and quiet ring, and the cross-section of rotating ring is the C style of calligraphy, comprises the moving-connecting ring 6 of the interior rotating ring 4, outer rotating ring 5 and the radial setting of axial setting, interior rotating ring cover is fixed mutually on the main shaft and through interference fit and main shaft.

The section of the static ring is reverse C-shaped, and the static ring consists of a main ring 7 arranged axially, a multi-lip sealing ring 8 and a static connecting ring 9 arranged radially, and a framework 10 with a reverse C-shaped section is arranged inside the static ring; the main ring is positioned in the end cover and is fixed with the end cover through interference fit, the left end of the multi-lip sealing ring is provided with a sealing lip 11, and the sealing lip consists of an outer sealing lip with a V-shaped section and an inner sealing lip with an inverted V-shaped section; the movable ring and the static ring are alternately inserted, the multi-lip sealing ring in the static ring is positioned between the inner movable ring and the outer movable ring in the movable ring, the outer sealing lip is tightly contacted and sealed with the outer movable ring, and the inner sealing lip is tightly contacted and sealed with the inner movable ring. The sealing lip is internally provided with an annular spring piece 13 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 movable ring and the outer movable ring under the expansion action of the spring piece. The inner circle surface of the main ring in the static ring is provided with an inclined auxiliary sealing lip 12 inwards along the radial direction, and the auxiliary sealing lip is tightly contacted and sealed with the outer side surface of the outer moving ring.

Claims

1. The utility model provides a wind generating set main shaft 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 main shaft sealing device of the wind generating set consists of a movable ring and a stationary ring, the section of the movable ring is C-shaped and consists of an inner movable ring, an outer movable ring and a movable connecting ring which are axially arranged, the inner movable ring is sleeved on the main shaft and is fixed with the main shaft through interference fit;

2. The wind generating set main shaft sealing device according to claim 1, wherein: the inner circular surface of the main ring in the static ring is provided with an inclined auxiliary sealing lip inwards along the radial direction, and the auxiliary sealing lip is tightly contacted and sealed with the outer side surface of the outer moving ring.

3. The wind generating set main shaft sealing device according to 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 movable ring and the outer movable ring under the expansion action of the spring piece.