CN217898726U

CN217898726U - Hollow tube sealing structure of gear box of wind driven generator

Info

Publication number: CN217898726U
Application number: CN202221696502.9U
Authority: CN
Inventors: 高飞; 倪达; 宋贵风
Original assignee: Shanghai Ch New Energy Technology Ltd
Current assignee: Shanghai Ch New Energy Technology Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-25
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses a aerogenerator gear box hollow tube seal structure belongs to sealing device technical field. Including the rotation axis, still include mounting flange, the flange sealing washer, the rotating ring sealing washer, quiet ring, quiet sealing washer for the ring hole and quiet sealing washer for the ring shaft, the rotating ring is fixed on the rotation axis and along with rotation axis rotation, through rotating ring sealing washer sealing connection between rotating ring and the rotation axis, the one end of rotating ring and the one end of quiet ring all are provided with the broach structure, the mutual concave-convex cooperation of broach structure forms sealed passageway, through quiet ring for the shaft sealing washer sealing connection between the other end bottom of quiet ring and the rotation axis, the gear box still includes the end cover, quiet ring is fixed on the end cover, it is sealed through quiet ring for the sealing washer hole between quiet ring and the end cover, the top and the mounting flange of quiet ring are connected. Through providing a aerogenerator gear box hollow tube seal structure, realized the rotation axis is sealed, solved effectively and revealed the problem, prevented again that impurity from getting into the gear box.

Description

Hollow tube sealing structure of gear box of wind driven generator

Technical Field

The utility model relates to a aerogenerator gear box hollow tube seal structure belongs to sealing device technical field.

Background

The gear box is widely applied to wind generating sets, is often used in the wind generating sets and is an important mechanical component, and the gear box mainly has the function of transmitting power generated by a wind wheel under the action of wind power to a generator and enabling the generator to obtain corresponding rotating speed. The speed of the wind wheel is usually very low, and the speed of the wind wheel is far less than the speed required by the generator to generate electricity, and the speed is increased by the speed increasing action of a gear pair of the gearbox, so the gearbox is also called as a speed increasing box. After the fan runs for a period of time, the high-speed shaft part of the gear box has a serious oil leakage phenomenon.

As shown in fig. 1 and 2, a labyrinth seal 01 and a V-seal 02 are currently used to seal between a high-speed shaft 03 and a gear housing 04. The sealed very easy leakage of these two kinds of structures is first integral erection structure moreover, is difficult for being used for online change, if change by online technical transformation, the product must be the subdivision formula, and ordinary radial seal (or end face seal) is used for accomplishing the accurate butt joint of subdivision department when online change very difficultly, under the condition that the axial does not have fixed equipment, can cause certain influence to radial seal effect.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve lies in: the utility model provides a aerogenerator gear box hollow tube seal structure, it has solved among the prior art radial seal effect of sealing washer is not good enough, causes the problem of revealing easily.

The utility model discloses the technical problem that will solve takes following technical scheme to realize:

a hollow tube sealing structure of a gear box of a wind driven generator comprises a rotating shaft, a mounting flange, a flange sealing ring, a moving ring sealing ring, a static ring, a sealing ring for a static ring hole and a sealing ring for a static ring shaft;

the movable ring is fixed on the rotating shaft and rotates along with the rotating shaft, the movable ring is in sealing connection with the rotating shaft through a movable ring sealing ring, comb tooth structures are arranged at one end of the movable ring and one end of the static ring, and the comb tooth structures are matched with each other in a concave-convex mode to form a sealing channel;

the gear box further comprises an end cover, the static ring is fixed on the end cover, the static ring and the end cover are sealed through a static ring hole sealing ring, the top of the static ring is connected with the mounting flange, and a flange sealing ring is arranged between the mounting flange and the gear box.

As a preferred example, the comb tooth structure forms a multiple double F-shaped sealing channel.

In a preferred embodiment, a stationary ring groove is formed on a surface of the stationary ring, and the stationary ring shaft is fixed in the stationary ring groove by a seal ring.

As a preferred example, the static ring is detachably connected with the mounting flange.

As a preferred example, the movable ring sealing ring is in interference fit with the rotating shaft.

In a preferred embodiment, the dynamic ring sealing ring and the static ring hole sealing ring are both O-rings.

The utility model has the advantages that:

1. the utility model provides a seal structure has adopted the combination of rotating ring and quiet ring non-contact, has realized that the rotation axis is sealed, has solved effectively and has revealed the problem, has prevented impurity again and has got into the gear box, has protected the life of gear box rotation axis, has prolonged the maintenance cycle of equipment, practices thrift the cost, has reduced the potential safety hazard.

2. The multiple double-F-shaped comb tooth structures inside the moving ring and the static ring form a dirt isolation channel and a lubricating oil medium isolation channel, so that the lubricating oil medium in the sealed cavity can be prevented from leaking, and external dirt can be prevented from entering the sealed cavity.

3. The static ring shaft is fixed in the static ring groove by a sealing ring and is contacted with the rotating shaft, so that the static ring and the rotating shaft are adjusted.

Drawings

FIG. 1 is a schematic structural view of a labyrinth seal of a reference;

FIG. 2 is a schematic view of a V-shaped seal ring of a reference;

fig. 3 is a schematic structural diagram of the present invention.

In the figure: 01. a labyrinth seal ring; 02. a V-shaped seal ring; 03. sealing the high-speed shaft; 04. a gear case; 1. a rotating shaft; 2. installing a flange; 3. a flange seal ring; 4. a moving ring; 5. a moving ring sealing ring; 6. a stationary ring; 7. a seal ring for a stationary ring hole; 8. a seal ring for a stationary ring shaft; 9. comb tooth structure.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.

As shown in fig. 3, the hollow tube sealing structure of the wind driven generator gearbox comprises a rotating shaft 1, a mounting flange 2, a flange sealing ring 3, a moving ring 4, a moving ring sealing ring 5, a static ring 6, a sealing ring 7 for a static ring hole and a sealing ring 8 for a static ring shaft.

The movable ring 4 is in interference fit with the rotating shaft 1 through a movable ring sealing ring 5 so as to be connected in a sealing manner, and is fixed on the rotating shaft 1 and rotates along with the rotating shaft 1.

One end of the rotating ring 4 and one end of the static ring 6 are both provided with comb tooth structures 9, the static ring 6 is sleeved on the outer side of the rotating ring 4, the comb tooth structures 9 are mutually matched in a concave-convex mode to form a multiple double-F-shaped sealing channel, and the double-F-shaped sealing channel comprises a lubricating medium channel, a sewage channel and an isolation channel.

The surface of the static ring 6 is provided with a static ring groove, a sealing ring 8 for a static ring shaft is fixed in the static ring groove, and the bottom of the other end of the static ring 6 is in sealing connection with the rotating shaft 1 through the sealing ring 8 for the static ring shaft.

The top of the static ring 6 is in threaded connection with the mounting flange 2. The gear box further comprises an end cover, the static ring 6 is fixed on the end cover, a sealing ring 7 for a static ring hole is arranged between the static ring 6 and the end cover, and sealing with the end cover is achieved through the sealing ring 7 for the static ring hole. And a flange sealing ring 3 is arranged between the mounting flange 2 and the gear box.

The moving ring sealing ring 5 and the static ring hole sealing ring 7 are both O-shaped rings. The O-ring is a rubber ring with a circular cross section, and is called an O-ring because the cross section is O-shaped. The device is mainly used for preventing the leakage of liquid and gas media of mechanical parts under static conditions. In some cases, the O-ring seal can also be used as a dynamic sealing element for both axial reciprocating and low speed rotary motion.

The O-shaped sealing ring is usually selected to be an O-shaped ring with a large cross section as much as possible, and under the condition of the same clearance, the volume of the O-shaped sealing ring extruded into the clearance is smaller than the maximum allowable value of the O-shaped sealing ring extruded into the clearance. The O-ring is a double acting sealing element, which is initially compressed in the radial or axial direction during installation, giving the O-ring its own initial sealing capacity, the sealing force generated by the system pressure and the initial sealing force combining to a total sealing force, which increases with increasing system pressure.

The working principle is as follows: fix rotating ring 4 on rotation axis 1 and rotate along with the axle, quiet ring 6 is static relatively, therefore rotating ring 4 and quiet ring 6 relative rotation, and the filth in the lubricated medium passageway and the filth passageway can not get back to seal chamber body again through two F type seal passages under the centrifugal force effect to play the two way seal effect, just so prevent that the lubricating oil medium from revealing outside seal chamber body.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the principles of this invention. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A hollow tube sealing structure of a gear box of a wind driven generator comprises a rotating shaft (1), and is characterized by further comprising a mounting flange (2), a flange sealing ring (3), a moving ring (4), a moving ring sealing ring (5), a static ring (6), a sealing ring (7) for a static ring hole and a sealing ring (8) for a static ring shaft;

the movable ring (4) is fixed on the rotating shaft (1) and rotates along with the rotating shaft (1), the movable ring (4) is connected with the rotating shaft (1) in a sealing mode through a movable ring sealing ring (5), comb tooth structures (9) are arranged at one end of the movable ring (4) and one end of the static ring (6), and the comb tooth structures (9) are matched with each other in a concave-convex mode to form a sealing channel;

the gear box is characterized in that the bottom of the other end of the static ring (6) is in sealing connection with the rotating shaft (1) through a static ring shaft sealing ring (8), the gear box further comprises an end cover, the static ring (6) is fixed on the end cover, the static ring (6) and the end cover are sealed through a static ring hole sealing ring (7), the top of the static ring (6) is connected with the mounting flange (2), and a flange sealing ring (3) is arranged between the mounting flange (2) and the gear box.

2. The hollow tube sealing structure of the gearbox of the wind driven generator as claimed in claim 1, characterized in that the comb tooth structure (9) forms multiple double-F-shaped sealing channels.

3. The hollow tube sealing structure of the gearbox of the wind driven generator as claimed in claim 1, wherein a stationary ring groove is formed in the surface of the stationary ring (6), and the shaft of the stationary ring (6) is fixed in the stationary ring groove by a sealing ring.

4. The hollow tube sealing structure of the gearbox of the wind driven generator as claimed in claim 1, characterized in that the static ring (6) is detachably connected with the mounting flange (2).

5. The hollow tube sealing structure of the gearbox of the wind driven generator as claimed in claim 1, wherein the rotating ring sealing ring (5) is in interference fit with the rotating shaft (1).

6. The hollow tube sealing structure of the gearbox of the wind driven generator as claimed in claim 1, wherein the seal ring (5) for the movable ring and the seal ring (7) for the static ring hole are both O-rings.