CN215409015U - Oil blocking structure of blade bearing of wind driven generator - Google Patents
Oil blocking structure of blade bearing of wind driven generator Download PDFInfo
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- CN215409015U CN215409015U CN202121354799.6U CN202121354799U CN215409015U CN 215409015 U CN215409015 U CN 215409015U CN 202121354799 U CN202121354799 U CN 202121354799U CN 215409015 U CN215409015 U CN 215409015U
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- pitch bearing
- transfer pump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses an oil blocking structure of a blade bearing of a wind driven generator, which comprises an oil collecting sleeve arranged on a rotating surface with an oil discharge hole on a variable pitch bearing, wherein the oil collecting sleeve comprises a cylindrical oil blocking cylinder, the edge of one end, far away from the variable pitch bearing, of the oil blocking cylinder is bent inwards to form a conical oil collecting throat, and the edge of the oil collecting throat abuts against the surface of a hub. The utility model can not only prevent the lubricating oil of the variable pitch bearing from polluting the surface of the hub, but also ensure the stable operation of the variable pitch bearing.
Description
Technical Field
The utility model relates to the technical field of wind driven generators, in particular to an oil blocking structure of a blade bearing of a wind driven generator.
Background
With the increasing of the environmental awareness of people, the popularization degree of wind power generation is higher and higher, and accordingly, a wind driven generator is also rapidly developed, wherein a variable pitch wind driven generator is a popular wind driven generator at present, and the variable pitch wind driven generator changes the pitch through blades to drive a hub of the wind driven generator to rotate, so that the wind driven generator captures more wind energy and generates electricity with maximum benefit.
In order to ensure proper operation of the pitch wind turbine, the wind turbine blades and the hub are connected by pitch bearings. It can be understood that a certain amount of lubricating oil needs to be filled in the blade variable pitch bearing, and when the blade variable pitch bearing works, the lubricating oil in the blade variable pitch bearing can continuously flow outwards and supplement the lubricating oil into the bearing, so that the frictional resistance of the blade during rotation is reduced to the maximum extent through the circulating flow of the lubricating oil.
The variable-pitch bearing structure of the existing structure has the following technical defects: the lubricating oil that outwards discharges can drip to the wheel hub surface, has both influenced wheel hub surface health, influences staff's business turn over wheel hub again. Although there have been attempts to connect an oil collection pot to the pitch bearing to collect the discharged oil, the following problems still exist with this solution: on the one hand, the oil collecting kettle is difficult to balance, that is to say, when the variable pitch bearing works, the oil collecting kettle can rotate at high speed together, and the oil collecting kettle at the moment can generate an eccentric moment to cause extra vibration during the work of the wind driven generator. On the other hand, the rotating oil collecting pot can lead the lubricating oil collected inside to be outwards pushed out.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an oil blocking structure of a blade bearing of a wind driven generator, which can prevent lubricating oil of a variable pitch bearing from polluting the surface of a hub and can ensure the stable operation of the variable pitch bearing.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a aerogenerator blade bearing keeps off oily structure, includes wheel hub, becomes oar bearing, it has one and the blade synchronous rotation's rotatory face to become the oar bearing to become, be equipped with the oil drain hole on the rotatory face, be equipped with the oil collection cover on the rotatory face that becomes the oar bearing, the oil collection cover includes the oil blocking section of thick bamboo of cylinder, and the oil blocking section of thick bamboo is kept away from the one end edge of becoming the oar bearing and is inwards buckled and form conical oil collection throat to make the axial cross-section of oil collection cover be the hook-type, the edge of oil collection throat supports and leans on the wheel hub surface.
According to the utility model, the oil collecting sleeve is arranged on the rotating surface with the oil discharge hole on the variable pitch bearing, and the end of the oil collecting sleeve, which is far away from the variable pitch bearing, forms the conical oil collecting necking which is bent inwards and is abutted against the surface of the hub, so that an oil collecting cavity is formed inside the oil collecting sleeve. Therefore, when the lubricating oil is discharged outwards through the oil discharge hole of the variable pitch bearing, the lubricating oil can be collected in the oil collection cavity of the oil collection sleeve, and the lubricating oil of the variable pitch bearing is effectively prevented from polluting the surface of the hub.
Particularly, the oil blocking cylinder of the oil collecting sleeve is cylindrical, so that even if the oil collecting sleeve rotates along with the variable-pitch bearing, eccentric moment cannot be formed to cause extra vibration.
In addition, the oil collecting necking of the oil collecting sleeve abutting against the surface of the hub is a conical structure formed by extending the edges of the oil blocking barrel together, so that the oil collecting sleeve is in a hook shape in the axial section. Therefore, the lubricating oil entering the oil collecting cavity can be preferentially stored in the hook-shaped part of the oil collecting cavity, and the lubricating oil is effectively prevented from overflowing outwards through the gap between the oil collecting sleeve and the surface of the hub.
Preferably, the oil collecting throat comprises a connecting ring integrally connected with the oil blocking cylinder, and an elastic extension ring which is fixedly connected with the connecting ring and extends inwards, and an inner hole of the extension ring abuts against the surface of the hub.
The oil-collecting throat comprises a connecting ring and an elastic extension ring which is fixedly connected with the connecting ring and extends inwards, so that the oil-collecting throat is elastically abutted against the surface of a hub through the extension ring. Like this, can greatly reduce the manufacturing accuracy of oil collection cover and the assembly accuracy of oil collection cover to ensure that the oil collection cover can support all the time and lean on the wheel hub surface, and then avoid lubricating oil outwards to spill over through the gap between oil collection cover and the wheel hub.
In particular, when the edge of the oil collection throat is provided with an extension ring which can be made of rubber or the like, the extension ring at this time actually becomes the extension part of the oil collection throat, so that the size of the oil collection throat can be remarkably increased, and the processing and the manufacturing of the oil collection sleeve are convenient.
Preferably, the device further comprises an oil return device for conveying lubricating oil to the variable pitch bearing, an oil inlet of the oil return device is communicated with the oil collection sleeve through an oil inlet pipeline, and an oil outlet of the oil return device is connected with the variable pitch bearing through an oil outlet pipeline.
When the lubricating oil in the oil collecting sleeve is gradually increased, the oil return device can be started, so that the lubricating oil in the oil collecting sleeve flows back to the variable-pitch bearing for re-lubrication, on one hand, the lubricating oil can be recycled, and on the other hand, the phenomenon that the lubricating oil in the oil collecting sleeve overflows outwards due to excessive lubricating oil can be avoided.
Preferably, the oil return device comprises an oil transfer pump and a controller, an oil inlet of the oil transfer pump is communicated with the oil collecting sleeve through an oil inlet pipeline, an oil outlet of the oil transfer pump is connected with the variable-pitch bearing through an oil outlet pipeline, a pressure sensor is arranged on the oil outlet pipeline and electrically connected with a normally open time relay, and when the oil pressure of the oil outlet pipeline is lower than a set value, the controller stops the oil transfer pump through the time relay.
It can be understood that the oil transfer pump can make the lubricating oil in the oil collecting sleeve flow back to the variable pitch bearing for lubrication, and at the moment, the lubricating oil flows through the oil outlet pipeline of the oil transfer pump and forms a certain pressure. When the oil pressure of the oil outlet pipeline is lower than a set value, the fact that the flow of the lubricating oil in the oil outlet pipeline is reduced or even no lubricating oil passes through can be proved. That is to say, lubricating oil in the oil collecting sleeve has flowed back to the variable pitch bearing for lubricating at this moment, therefore, the controller makes the oil transfer pump shut down to avoid the idle running of oil transfer pump effectively. In particular, the controller stops the oil delivery pump through a normally open time relay, that is, the time relay automatically changes from off to on after a certain time, so that the oil delivery pump is restarted, and new lubricating oil is accumulated in the oil collection sleeve at the moment. Therefore, the utility model can realize the clearance work of the oil transfer pump through the normally open time relay, not only can lead the lubricating oil in the oil collecting sleeve to flow back to the variable-pitch bearing in time for re-lubrication, but also can avoid the idle running of the oil transfer pump.
Therefore, the utility model has the following beneficial effects: lubricating oil of the variable pitch bearing can be prevented from polluting the surface of the hub, and stable operation of the variable pitch bearing can be ensured.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a structure of an oil collection jacket.
In the figure: 1. the oil collecting device comprises an oil collecting sleeve 11, an oil blocking cylinder 12, an oil collecting throat 13, an oil collecting cavity 2, a variable pitch bearing 21, a rotating surface 3 and an extension ring.
Detailed Description
The utility model is further described with reference to the following detailed description and accompanying drawings.
As shown in fig. 1 and 2, the oil blocking structure for the blade bearing of the wind driven generator comprises an oil collecting sleeve 1 arranged on a pitch bearing 2, and specifically, the oil collecting sleeve is arranged on a rotating surface 21 of the pitch bearing with an oil discharge hole. The oil collecting sleeve comprises a cylindrical oil baffle cylinder 11, the edge of one end, away from the variable-pitch bearing, of the oil baffle cylinder is bent inwards to form a conical oil collecting throat 12, and the edge of the oil collecting throat abuts against the surface of the hub 6, so that an oil collecting cavity 13 is formed inside the oil collecting sleeve. Therefore, when the lubricating oil is discharged outwards through the oil discharge hole of the variable pitch bearing, the lubricating oil can be collected in the oil collection cavity of the oil collection sleeve, and the lubricating oil of the variable pitch bearing is effectively prevented from polluting the surface of the hub.
Particularly, the oil blocking cylinder of the oil collecting sleeve is cylindrical, so that even if the oil collecting sleeve rotates along with the variable-pitch bearing, eccentric moment cannot be formed to cause extra vibration.
In addition, the oil collecting necking of the oil collecting sleeve abutting against the surface of the hub is a conical structure formed by extending the edges of the oil blocking cylinder together, so that the oil collecting sleeve is in a hook shape in the axial section. Therefore, the lubricating oil entering the oil collecting cavity can be preferentially stored in the hook-shaped part of the oil collecting cavity, and the lubricating oil is effectively prevented from overflowing outwards through a gap between the oil collecting sleeve and the surface of the hub.
As a preferable scheme, an elastic extension ring 3 formed by extending inwards is arranged at the edge of the oil collection reducing opening, and an inner hole of the extension ring is elastically abutted against the surface of the hub, so that the manufacturing precision of the oil collection sleeve and the assembling precision of the oil collection sleeve can be greatly reduced. That is to say, even if the oil collecting sleeve has manufacturing deviation or assembly error, still can ensure that the oil collecting sleeve can still lean against the wheel hub surface all the time, and then avoids lubricating oil to spill over outwards through the gap between oil collecting sleeve and the wheel hub.
In particular, the extension ring is actually an extension part of the oil collection throat, so that the size of the oil collection throat can be remarkably increased and the volume of the oil collection cavity can be enlarged on the premise of not increasing the manufacturing difficulty.
Furthermore, the utility model also comprises an oil return device for conveying lubricating oil to the variable pitch bearing, wherein the oil return device comprises an oil inlet and an oil outlet, the oil inlet of the oil return device is communicated with the oil collecting cavity of the oil collecting sleeve through an oil inlet pipeline, and the oil outlet of the oil return device is connected with the variable pitch bearing through an oil outlet pipeline.
When the lubricating oil collected in the oil collecting sleeve is gradually increased, the oil return device can be started, so that the lubricating oil in the oil collecting sleeve flows back to the variable-pitch bearing for re-lubrication, on one hand, the lubricating oil can be recycled, and on the other hand, the phenomenon that the lubricating oil in the oil collecting sleeve overflows outwards due to excessive lubricating oil can be avoided.
The oil return device comprises an oil transfer pump with an oil inlet and an oil outlet and a controller, wherein the oil inlet of the oil transfer pump is communicated with an oil collecting cavity of an oil collecting sleeve through an oil inlet pipeline, and the oil outlet of the oil transfer pump is connected with the variable-pitch bearing through an oil outlet pipeline. In addition, a pressure sensor which can sense the pressure of the lubricating oil in the oil outlet pipeline is arranged on the oil outlet pipeline, and the pressure sensor is electrically connected with a normally open time relay used for controlling the work of the oil delivery pump.
When the oil pressure of the oil outlet pipeline is lower than a set value, the flow of the lubricating oil in the oil outlet pipeline is reduced, and even no lubricating oil passes through the oil outlet pipeline. That is to say, the amount of the lubricating oil which can be extracted from the oil collecting cavity of the oil collecting sleeve is extremely small, so that the controller stops the oil delivery pump through the time relay, and the idling of the oil delivery pump is effectively avoided. Because the controller stops the oil delivery pump through the normally open time relay, when new lubricating oil is accumulated in the oil collecting sleeve again, the time relay can be automatically changed from off to on, and the oil delivery pump is restarted. That is to say, the normally open time relay can realize the clearance work of oil transfer pump, both can make the lubricating oil in the collection oil cover flow back in time to become oar bearing department and lubricate again, can avoid the idle running of oil transfer pump again. It will be appreciated that the appropriate time relay may be selected based on the rate of accumulation of the lubricant in the oil collection chamber.
Of course, the oil return device can also comprise an oil return pool, an oil transfer pump with an oil inlet and an oil outlet, and a controller, wherein the oil inlet of the oil transfer pump is communicated with the oil return pool through an oil inlet pipeline, the oil outlet of the oil transfer pump is connected with the variable-pitch bearing through an oil outlet pipeline, a communicating pipeline is arranged between the oil collection sleeve and the oil return pool, and a liquid level sensor is arranged in the oil return pool.
When the liquid level sensor senses that the liquid level of the lubricating oil in the oil return tank is lower than the set value of the liquid level sensor, the lubricating oil at the moment is proved to be mainly stored in the oil collecting sleeve, and the controller enables the oil delivery pump to work so as to pump the lubricating oil in the oil collecting sleeve into the oil return tank; when the liquid level in the oil return tank is higher than the set value of the liquid level sensor, the lubricating oil in the oil collecting sleeve is proved to be pumped into the oil return tank at the moment, and the controller stops the oil transfer pump, so that the idling of the oil transfer pump is avoided.
That is, the oil return pool in the scheme can play a role of 'transferring' lubricating oil, so that frequent starting of the oil transfer pump can be avoided. Particularly, when the lubricating oil in the oil return pool is increased gradually, even if the amount of the lubricating oil in the oil collecting sleeve does not exceed the normal storage amount at the moment, the oil transfer pump still starts, so that the redundant lubricating oil in the oil return pool is pumped back to the variable-pitch bearing for lubrication.
It should be noted that the oil inlet pipeline connected to the oil inlet of the oil transfer pump may be inserted into the bottom of the oil return tank, and the communication pipeline connecting the oil return tank and the oil collecting sleeve may also be inserted into the bottom of the oil return tank. When the oil transfer pump is started and pumps the lubricating oil in the oil tank, negative pressure is formed in the oil return tank, and the lubricating oil in the oil collecting sleeve can be pumped.
Claims (4)
1. The utility model provides a aerogenerator blade bearing keeps off oily structure, includes wheel hub, becomes oar bearing, it has one and the blade synchronous rotation's rotating surface to become the oar bearing to become, be equipped with the oil drain hole on the rotating surface, is equipped with the oil collection cover on the rotating surface that becomes the oar bearing, characterized by, the oil collection cover includes the oil blocking section of thick bamboo of cylinder, and the one end edge that keeps away from the oar bearing of oil blocking section of thick bamboo inwards buckles and forms conical oil collection throat to the axial cross-section that makes the oil collection cover is the hook-type, the edge of oil collection throat supports and leans on the wheel hub surface.
2. The wind turbine blade bearing oil baffle structure as defined in claim 1, wherein the oil collecting throat comprises a connecting ring integrally connected with the oil baffle cylinder, and an elastic extension ring fixed on the connecting ring and extending inwards, and an inner hole of the extension ring abuts against the surface of the hub.
3. The wind driven generator blade bearing oil baffle structure as defined in claim 1, further comprising an oil return device for delivering lubricating oil to the pitch bearing, wherein an oil inlet of the oil return device is communicated with the oil collecting sleeve through an oil inlet pipeline, and an oil outlet of the oil return device is connected with the pitch bearing through an oil outlet pipeline.
4. The wind driven generator blade bearing oil baffle structure as defined in claim 3, wherein the oil return device comprises an oil transfer pump and a controller, an oil inlet of the oil transfer pump is communicated with the oil collecting sleeve through an oil inlet pipeline, an oil outlet of the oil transfer pump is connected with the pitch bearing through an oil outlet pipeline, a pressure sensor is arranged on the oil outlet pipeline, the pressure sensor is electrically connected with a normally open time relay, and when the oil pressure of the oil outlet pipeline is lower than a set value, the controller stops the oil transfer pump through the time relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121354799.6U CN215409015U (en) | 2021-06-17 | 2021-06-17 | Oil blocking structure of blade bearing of wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121354799.6U CN215409015U (en) | 2021-06-17 | 2021-06-17 | Oil blocking structure of blade bearing of wind driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN215409015U true CN215409015U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121354799.6U Active CN215409015U (en) | 2021-06-17 | 2021-06-17 | Oil blocking structure of blade bearing of wind driven generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339212A (en) * | 2021-06-17 | 2021-09-03 | 浙江运达风电股份有限公司 | Oil blocking structure of blade bearing of wind driven generator |
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2021
- 2021-06-17 CN CN202121354799.6U patent/CN215409015U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339212A (en) * | 2021-06-17 | 2021-09-03 | 浙江运达风电股份有限公司 | Oil blocking structure of blade bearing of wind driven generator |
| CN113339212B (en) * | 2021-06-17 | 2022-10-11 | 浙江运达风电股份有限公司 | Oil blocking structure of blade bearing of wind driven generator |
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