CN212775567U - Bearing sealing device for wind turbine generator - Google Patents
Bearing sealing device for wind turbine generator Download PDFInfo
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- CN212775567U CN212775567U CN202020733284.6U CN202020733284U CN212775567U CN 212775567 U CN212775567 U CN 212775567U CN 202020733284 U CN202020733284 U CN 202020733284U CN 212775567 U CN212775567 U CN 212775567U
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Abstract
The utility model provides a bearing sealing device for a wind turbine generator, which consists of a connecting part and a sealing part which are connected into a whole, wherein the connecting part is sleeved on a small shaft and the cross section of the connecting part is in a U shape; the cross-section of sealing is oblique Z style of calligraphy, comprises the interior seal lip, outer seal lip and the water conservancy diversion step that all are the ring form, and the connection position of interior seal lip and outer seal lip is connected fixedly as an organic whole with the lateral wall of third go-between, and the right-hand member of interior seal lip and outer seal lip all pushes up on the lateral wall of rotor and is sealed with rotor in close contact with. The device has the advantages of simple structure, good sealing performance, long service life and low manufacturing cost.
Description
Technical Field
The utility model provides a sealing device especially provides a device that is arranged in aerogenerator bearing frame to seal, belongs to mechanical seal technical field.
Background
The wind driven generator is a device for converting wind energy into electric energy, and mainly comprises blades, a generator, mechanical parts and electrical parts. The wind generating set is installed in the air, so that the maintenance work is quite difficult. Along with the increase of capacity, the complexity of unit also is higher and higher, in order to guarantee the safe production operation of unit, reduces the seepage of unit and is an important maintenance work of wind generating set. The wind generating set relates to sealed parts and has: the main shaft assembly, the main gear box, the yaw reducer, the pitch reducer, the yaw bearing, the pitch bearing and the like. The leakage of lubricating grease and hydraulic oil caused by sealing failure not only affects the civilized production, but also has certain influence on the environment; hidden dangers are brought to the safety production of the unit, accident hidden dangers such as fire disasters are easy to cause, and the problem of solving the leakage of the wind generating set is always difficult due to the difficulty in maintaining the wind generating set.
Along with the development of the existing sealing technology, the sealing device arranged on the bearing seat of the novel wind generating set can basically realize a good sealing effect. 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.
Chinese utility model patent 2019218593993 provides a bearing seal device for wind turbine generator system impeller side, the device's sealing is by being annular first seal lip, second seal lip and dustproof lip are constituteed, first seal lip, the left end of second seal lip and dustproof lip is all connected on the side of third go-between, and first seal lip, second seal lip and dustproof lip set gradually by interior outside, first seal lip, second seal lip and dustproof lip all set up and the three's right-hand member all pushes up on the lateral wall of rotor and is sealed with rotor in close contact with along the axial slope. However, the device has high production cost due to the fact that the mold opening difficulty of the sealing part is high in the production and manufacturing process and the rejection rate is high in the manufacturing process.
Disclosure of Invention
The utility model discloses a needle provides a bearing sealing device for wind turbine generator system, the device can be sealed the one side that generator bearing frame is close to the impeller, and its simple structure, leakproofness are good, and life is permanent, the cost of manufacture is lower.
A bearing sealing device for a wind turbine generator is arranged between a stator and a rotor, wherein the stator is of a stepped shaft structure and comprises a large shaft and a small shaft, the small shaft is arranged inside the rotor, the rotor rotates relative to the small shaft, a gap between the rotor and the small shaft is a sealing cavity, the sealing device is integrally in a ring shape and seals the sealing cavity, the sealing device comprises a connecting part and a sealing part which are connected into a whole, the connecting part is sleeved on the small shaft, the cross section of the connecting part is U-shaped, the connecting part comprises a first connecting ring which is arranged along the radial direction and attached to the side surface of the large shaft, a second connecting ring which is arranged along the axial direction and sleeved on the outer circular surface of the small shaft and a third connecting ring which is arranged along the radial direction and close to the rotor, a hoop is arranged on the outer circular surface of the second;
the cross-section of sealing is oblique Z style of calligraphy, comprises the interior seal lip, external seal lip and the water conservancy diversion step that all are the ring form, and the three from interior to exterior sets gradually, and the connection position of interior seal lip and external seal lip is connected fixed as an organic wholely with the lateral wall of third go-between, and the right-hand member of interior seal lip and external seal lip all pushes up on the lateral wall of rotor and is sealed with rotor in close contact with, the bottom of external seal lip is provided with the row's of external intercommunication fat mouth, and the water conservancy diversion step is located the below of arranging the fat mouth and is used for carrying out the water conservancy diversion to the grease of flowing from arranging the fat mouth.
The sealing structure is characterized in that an annular spring framework is integrally arranged in the sealing part and the connecting part, the spring framework is sequentially arranged along the first connecting ring, the second connecting ring, the third connecting ring, the outer sealing lip and the inner part of the flow guide step, and the right end of the outer sealing lip is tightly attached to the side wall of the rotor under the elastic action of the spring framework.
An oil collecting box is installed on a large shaft of the stator and is located below the grease discharging port.
Compared with the prior art, the utility model provides a sealing device has following advantage: 1. the utility model discloses simple structure is sealed through interior seal lip, external seal lip and rotor in close contact with to realize good sealed and dustproof effect. 2. The utility model discloses well sealing and connecting portion internal fixation have annular spring skeleton, and the external seal lip is hugged closely on the lateral wall of rotor its right-hand member under the elastic action of spring skeleton, even if lead to the lip face to produce wearing and tearing through long-time use, because the elastic action of spring also can make the right-hand member of external seal lip hug closely on the lateral wall of rotor to guarantee sealed effect. 3. The bottom of the outer sealing lip is provided with a grease discharging port communicated with the outside, and an oil collecting box is correspondingly arranged on the large shaft of the stator. After the rotor works for a long time, a small part of grease which crosses the inner sealing lip from the sealing cavity and enters the sealing device flows out of the grease discharging port and is collected into the oil collecting box under the flow guiding effect of the flow guiding step, and leakage is avoided.
Drawings
Fig. 1 is a schematic overall structural diagram of a bearing sealing device for a wind turbine generator provided by the present invention;
in the figure: 1-rotor, 2-big shaft, 3-small shaft, 4-sealing cavity, 5-first connecting ring, 6-second connecting ring, 7-third connecting ring, 8-hoop, 9-inner sealing lip, 10-outer sealing lip, 11-flow guiding step, 12-spring framework, 13-grease discharging port and 14-oil collecting box.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a bearing sealing device's structure for wind turbine generator system is shown in FIG. 1, installs between stator and rotor 1, the stator is the step shaft structure, including macroaxis 2 and staff 3, the staff is installed in the inside of rotor, and the rotor is sealed chamber 4 for the rotatory and clearance between the two of staff. The whole ring form that is of sealing device seals the sealed chamber, and sealing device comprises connecting portion and sealing as an organic whole, and wherein connecting portion cover is the U type on the staff and its cross-section, and connecting portion are by radially setting up and paste the first go-between 5 of pasting on the staff side, along the axial setting and cover the second go-between 6 on the outer disc of staff and along radially setting up and be close to the third go-between 7 constitution of rotor, are provided with clamp 8 on the outer disc of second go-between, and connecting portion pass through the clamp and are fixed mutually with the stator.
The cross-section of sealing is oblique Z style of calligraphy, comprises the interior seal lip 9, outer seal lip 10 and the water conservancy diversion step 11 that all are the ring form, and the three from interior to exterior sets gradually, and the connection position of interior seal lip and outer seal lip is fixed as an organic whole with the lateral wall of third go-between, and the right-hand member of interior seal lip and outer seal lip all pushes up on the lateral wall of rotor and is sealed with rotor in close contact with, be provided with wholly annular spring skeleton 12 in sealing and the connecting portion, the spring skeleton sets up along the inside of first go-between, second go-between, third go-between, outer seal lip and water conservancy diversion step in proper order, and the outer seal lip hugs closely on the lateral wall of rotor at its right-hand member under the elastic action of spring skeleton. Even if the lip surface is abraded after long-time use, the right end of the outer sealing lip is tightly attached to the side wall of the rotor due to the elastic action of the spring, and therefore the sealing effect is guaranteed.
The bottom of the outer sealing lip is provided with a grease discharging port 13 communicated with the outside, and the flow guide step is located below the grease discharging port and used for guiding grease flowing out of the grease discharging port. An oil collecting box 14 is arranged on the large shaft of the stator and is positioned below the grease discharging port. After the rotor works for a long time, a small part of grease which crosses the inner sealing lip from the sealing cavity and enters the sealing device flows out of the grease discharging port and is collected into the oil collecting box under the flow guiding effect of the flow guiding step, and leakage is avoided.
Claims (3)
1. A bearing sealing device for a wind turbine generator is arranged between a stator and a rotor, wherein the stator is of a stepped shaft structure and comprises a large shaft and a small shaft, the small shaft is arranged inside the rotor, the rotor rotates relative to the small shaft, a gap between the rotor and the small shaft is a sealing cavity, the sealing device is integrally in a ring shape and seals the sealing cavity, the sealing device comprises a connecting part and a sealing part which are connected into a whole, the connecting part is sleeved on the small shaft, the cross section of the connecting part is U-shaped, the connecting part comprises a first connecting ring which is arranged along the radial direction and attached to the side surface of the large shaft, a second connecting ring which is arranged along the axial direction and sleeved on the outer circular surface of the small shaft and a third connecting ring which is arranged along the radial direction and close to the rotor, a hoop is arranged on the outer circular surface of the second;
the method is characterized in that: the cross-section of sealing is oblique Z style of calligraphy, comprises the interior seal lip, external seal lip and the water conservancy diversion step that all are the ring form, and the three from interior to exterior sets gradually, and the connection position of interior seal lip and external seal lip is connected fixed as an organic wholely with the lateral wall of third go-between, and the right-hand member of interior seal lip and external seal lip all pushes up on the lateral wall of rotor and is sealed with rotor in close contact with, the bottom of external seal lip is provided with the row's of external intercommunication fat mouth, and the water conservancy diversion step is located the below of arranging the fat mouth and is used for carrying out the water conservancy diversion to the grease of flowing from arranging the fat mouth.
2. The bearing seal for a wind turbine according to claim 1, characterized in that: the sealing structure is characterized in that an annular spring framework is integrally arranged in the sealing part and the connecting part, the spring framework is sequentially arranged along the first connecting ring, the second connecting ring, the third connecting ring, the outer sealing lip and the inner part of the flow guide step, and the right end of the outer sealing lip is tightly attached to the side wall of the rotor under the elastic action of the spring framework.
3. The bearing seal for a wind turbine according to claim 1, characterized in that: an oil collecting box is installed on a large shaft of the stator and is located below the grease discharging port.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202020733284.6U CN212775567U (en) | 2020-05-07 | 2020-05-07 | Bearing sealing device for wind turbine generator |
Applications Claiming Priority (1)
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CN202020733284.6U CN212775567U (en) | 2020-05-07 | 2020-05-07 | Bearing sealing device for wind turbine generator |
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CN212775567U true CN212775567U (en) | 2021-03-23 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113653804A (en) * | 2021-08-05 | 2021-11-16 | 华能通辽风力发电有限公司 | Oil seal structure and generator set |
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2020
- 2020-05-07 CN CN202020733284.6U patent/CN212775567U/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113653804A (en) * | 2021-08-05 | 2021-11-16 | 华能通辽风力发电有限公司 | Oil seal structure and generator set |
CN113653804B (en) * | 2021-08-05 | 2024-06-04 | 华能通辽风力发电有限公司 | Oil seal structure and generator set |
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