CN216589868U - Sealing structure for output end of yaw gearbox - Google Patents
Sealing structure for output end of yaw gearbox Download PDFInfo
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- CN216589868U CN216589868U CN202123435423.0U CN202123435423U CN216589868U CN 216589868 U CN216589868 U CN 216589868U CN 202123435423 U CN202123435423 U CN 202123435423U CN 216589868 U CN216589868 U CN 216589868U
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- bearing sealing
- gear shaft
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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 a sealing structure for the output end of a yaw gearbox, which comprises an output box body and an output gear shaft, wherein the output gear shaft is sequentially sleeved with a bearing, a bearing sealing cover and an adjusting pad from top to bottom; the outer ring of the bearing sealing cover is higher than the inner ring of the bearing sealing cover, the upper end of the outer ring of the bearing sealing cover is provided with an inward-bent rolling opening, the rolling opening is in interference fit with the end face of the outer ring of the bearing, and the outer ring of the bearing sealing cover is in interference fit with the mounting hole of the output box body; the adjusting pad is in interference fit with the output gear shaft, and the upper surface of the adjusting pad is abutted against the lower end face of the bearing sealing cover so as to axially position the bearing sealing cover. Through adopting screwless oilless seal structure, simplified seal structure, reduced manufacturing cost to the safety risk that the screw becomes flexible to drop and causes has been avoided.
Description
Technical Field
The utility model relates to a driftage gear box technical field, more specifically say, relate to a driftage gear box output seal structure.
Background
The yaw gear box is used as a speed reducer, is an important component of the wind generating set and mainly comprises an input end, a multi-stage planetary gear structure and an output end.
Referring to fig. 1, a conventional yaw gearbox generally adopts a fastening screw 01 to fix an output end cover 03 and cooperate with an oil seal 02 to seal an output end. The output box body 1 is connected with the output end cover 03 through a fastening screw 01, the output gear shaft 2 is installed in mounting holes of the output box body 1 and the output end cover 03, and an oil seal 02 sleeved on the output gear shaft 2 and a sealing ring used for positioning the axial position of the oil seal 02 are arranged in the mounting hole of the output end cover 03.
Therefore, the output end cover 03 needs to be provided with a threaded hole, an oil seal groove and a seal ring groove, and the process is complicated and the cost is high; the screw thread screwing length relation of the screw thread connection enables the output box body 1 and the output end cover 03 to meet corresponding thickness requirements, and therefore the casting and machining cost of the output box body 1 and the output end cover 03 is increased.
The span between the lower end bearing and the output gear is large, which is not beneficial to bearing support; the lower end face of the lower end bearing is in direct contact with the shaft shoulder of the output gear shaft 2, so that large stress concentration can be caused, the size and the weight of the output gear shaft 2 are increased due to the lower end face and the shaft shoulder, and the blank cost and the later-stage processing cost are increased.
In addition, the vibration of the wind power cabin may cause the fastening screw 01 to be loosened and even fall off, which affects the stability of the sealing structure and also seriously affects the normal operation of the yaw gearbox.
In summary, how to provide a sealing structure for an output end of a yaw gearbox, which has a simple structure, low cost and safe use, is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a driftage gear box output seal structure adopts screwless oilless seal structure, has simplified seal structure, has reduced manufacturing cost to the safety risk that the screw becomes flexible to drop and causes has been avoided.
In order to achieve the above object, the present invention provides the following technical solutions:
a sealing structure for the output end of a yaw gearbox comprises an output box body and an output gear shaft, wherein the output gear shaft is sequentially sleeved with a bearing, a bearing sealing cover and an adjusting pad from top to bottom;
the outer ring of the bearing sealing cover is higher than the inner ring of the bearing sealing cover, the upper end of the outer ring of the bearing sealing cover is provided with an inward-bent rolling opening, the rolling opening is in interference fit with the end face of the outer ring of the bearing, and the outer ring of the bearing sealing cover is in interference fit with the mounting hole of the output box body;
the adjusting pad is in interference fit with the output gear shaft, and the upper surface of the adjusting pad is abutted against the lower end face of the bearing sealing cover so as to axially position the bearing sealing cover.
Preferably, the radial clearance value between the bearing sealing cover and the output gear shaft is 1-2 mm.
Preferably, the output gear shaft is provided with a transition conical surface which is used for matching with the bearing sealing cover and has an inclination angle of 45 degrees, and the axial distance of the transition conical surface is 1/2 of the radial clearance value.
Preferably, the inner ring of the adjusting pad is provided with a chamfer, and the size of the chamfer is 0.5-1mm larger than that of the transition fillet of the output gear shaft.
Preferably, the bearing sealing cover is a crimping stamping part.
Preferably, the winding opening of the bearing seal cover is a hardened surface.
Preferably, the surface of the adjustment pad is a hardened surface.
The utility model provides a sealing structure for the output end of a yaw gearbox, wherein a bearing sealing cover is sleeved on an output gear shaft, and a rolling opening of the bearing sealing cover is in interference fit with a bearing outer ring, so that lubricating grease can be sealed; the outer ring of the bearing sealing cover is in interference fit with the mounting hole of the output box body, so that lubricating grease can be further sealed, the lubricating grease is prevented from flowing out, and impurities such as external dust can be prevented from entering.
The one end of bearing seal lid and the terminal surface butt of bearing inner race, the other end and the up end butt of adjustment pad have restricted the axial position of bearing seal lid effectively, have avoided the bearing seal lid to take place the axial float, have avoided the bearing inner race terminal surface to cause great stress concentration with the shaft shoulder contact of output gear axle simultaneously, have ensured the intensity of output gear axle.
Therefore, the utility model provides a driftage gear box output seal structure through adopting no screw oil free seal structure, has not only reduced the cost that annexes such as screw, oil blanket brought, has still avoided the not hard up operating stability risk that drops and cause of screw.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a sealing structure of an output end of a yaw gearbox in the prior art;
fig. 2 is a schematic structural view of a specific embodiment of a sealing structure for an output end of a yaw gearbox provided by the present invention;
fig. 3 is a partially enlarged view of the area a.
In fig. 1-3:
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a driftage gear box output seal structure adopts screwless oil-free seal structure, has simplified seal structure, has reduced manufacturing cost to the safety risk of having avoided the screw not hard up to drop the initiation.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of an embodiment of a sealing structure for an output end of a yaw gearbox according to the present invention; fig. 3 is a partially enlarged view of the area a.
The utility model provides a yaw gearbox output end sealing structure, including output box 1 and output gear shaft 2, output gear shaft 2 is overlapped from top to bottom in proper order and is equipped with bearing 3, bearing seal lid 4 and adjusting pad 5, the up end of bearing seal lid 4 and the inner circle terminal surface butt of bearing 3, the inner circle of bearing seal lid 4 and output gear shaft 2 clearance fit; the outer ring of the bearing sealing cover 4 is higher than the inner ring of the bearing sealing cover 4, the upper end of the bearing sealing cover 4 is provided with an inward-bent rolling opening, the rolling opening is in interference fit with the end face of the outer ring of the bearing 3, and the outer ring of the bearing sealing cover 4 is in interference fit with the mounting hole of the output box body 1; the adjusting pad 5 is in interference fit with the output gear shaft 2, and the upper surface of the adjusting pad 5 is abutted against the lower end face of the bearing sealing cover 4 so as to axially position the bearing sealing cover 4.
Referring to fig. 2, the output gear shaft 2 is installed in the output housing 1 through a plurality of bearings 3, and the specific number, type, size, etc. of the bearings 3 are determined according to the actual production requirements, and are not described herein again. Among the plurality of bearings 3, the bearing 3 relatively close to the output gear is a lower end bearing.
The bearing sealing cover 4 is of an outwards-tilted annular structure, the inner ring of the bearing sealing cover 4 is in clearance connection with the outer peripheral part of the output gear shaft 2, the outer ring of the bearing sealing cover 4 is in interference fit with the inner wall surface of the mounting hole of the output box body 1, the outer ring of the bearing sealing cover 4 is in interference fit with the output box body 1 to realize sealing of the inner cavity of the output box body 1, on one hand, grease leakage of the output end bearing is avoided, and on the other hand, external dust and other impurities are prevented from entering.
The upper end of the outer ring of the bearing sealing cover 4 is provided with an inward-bent rolling opening, and the specific radian and other dimensions of the rolling opening are determined according to the shape, the size and other factors of the lower end bearing in actual production, and are not described again.
The edge of the rolling hole is in interference fit with the end face of the outer ring of the lower end bearing, so that lubricating grease of the bearing 3 can be effectively sealed, and the lubricating grease is prevented from leaking from the edge of the bearing sealing cover 4, the edge of the output box body 1 and the edge of the output gear shaft 2.
In order to realize the smooth disassembly and assembly of the bearing sealing cover 4, the end face of the outer ring of the winding opening and the lower end bearing is usually arranged to be in large interference fit, and the outer ring is in small interference fit with the mounting hole of the output box body 1.
The interference fit between the output box body 1 and the bearing sealing cover 4 and between the output gear shaft 2 and the bearing sealing cover 4 can adopt press fit at normal temperature and can also adopt hot fit, and the specific assembling mode is determined according to the requirements in actual production.
Preferably, the radial clearance value between the bearing sealing cover 4 and the output gear shaft 2 is set to be 1-2mm, and the radial clearance value is larger, so that the assembly of the bearing sealing cover 4 and the adjusting pad 5 is facilitated.
The upper end face of the bearing sealing cover 4 is abutted against the end face of the inner ring of the lower end bearing, and the lower end face of the bearing sealing cover 4 is abutted against the upper end face of the adjusting pad 5, so that the axial positioning of the bearing sealing cover 4 is realized, and the axial movement of the bearing sealing cover 4 in the use process is avoided.
The adjusting pad 5 is sleeved on the outer periphery of the output gear shaft 2, and for the convenience of positioning the adjusting pad 5, please refer to fig. 3, the adjusting pad 5 is sleeved on the positioning journal of the output gear shaft 2, and the length of the adjusting pad 5 is the same as the length of the positioning journal.
In order to obtain a better fit of the setting pad 5 with the output gear shaft 2, the inner ring of the setting pad 5 may preferably be provided with a chamfer having a dimension which is 0.5-1mm greater than the dimension of the transition fillet of the output gear shaft 2. The size of the chamfer is slightly larger than that of the transition fillet so that the inner ring of the adjusting pad 5 can be tightly attached to the circumferential surface of the positioning journal of the output gear shaft 2.
The height of the positioning shaft neck on the output gear shaft 2 and the size of the transition fillet are checked, calculated and determined according to the design strength requirement of the output gear shaft 2 in actual production, and are not described again.
In the embodiment, the bearing sealing cover 4 is sleeved on the output gear shaft 2, and the rolling opening of the bearing sealing cover 4 is in interference fit with the outer ring of the bearing 3, so that lubricating grease can be sealed; the outer ring of the bearing sealing cover 4 is in interference fit with the mounting hole of the output box body 1, so that lubricating grease can be further sealed, the lubricating grease is prevented from flowing out, and impurities such as external dust can be prevented from entering.
One end of the bearing sealing cover 4 is abutted against the end face of the inner ring of the bearing 3, the other end of the bearing sealing cover is abutted against the upper end face of the adjusting pad 5, the axial position of the bearing sealing cover 4 is effectively limited, the bearing sealing cover 4 is prevented from axially moving, the phenomenon that the end face of the inner ring of the bearing 3 is contacted with the shaft shoulder of the output gear shaft 2 to cause large stress concentration is avoided, and the strength of the output gear shaft 2 is ensured.
Therefore, the yaw gearbox output end sealing structure that this embodiment provided through adopting no screw does not have oily seal structure, has not only reduced the cost that annexes such as screw, oil blanket 02 brought, has still avoided the screw not hard up operating stability risk that drops and cause.
In order to facilitate the installation of the adjusting pad 5, the output gear shaft 2 may preferably be provided with a transition conical surface having an inclination angle of 45 ° for cooperating with the bearing seal cover 4, and the axial distance of the transition conical surface is 1/2 of the radial clearance value.
On the basis of the above embodiment, the bearing seal cover 4 may be configured as a rolled edge stamping part, which is formed by stamping a steel plate and the like, so that compared with the turning process of each hole groove on the existing output end cover 03, the production process is greatly simplified, and the production cost is reduced.
Preferably, the winding opening of the bearing sealing cover 4 can be a hardened surface, so that the structural strength of the winding opening is increased through hardening, and the abrasion of the winding opening caused by the vibration of the wind turbine nacelle and the like is reduced.
In addition to the above embodiments, considering that the upper end surface of the adjustment pad 5 abuts against the bearing seal cover 4, the surface of the adjustment pad 5 may be a hardened surface to reduce wear of the adjustment pad 5 and prolong the service life thereof.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides a driftage gear box output seal structure has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (7)
1. The sealing structure for the output end of the yaw gearbox comprises an output box body (1) and an output gear shaft (2), and is characterized in that the output gear shaft (2) is sequentially sleeved with a bearing (3), a bearing sealing cover (4) and an adjusting pad (5) from top to bottom, the upper end face of the bearing sealing cover (4) is abutted to the end face of an inner ring of the bearing (3), and the inner ring of the bearing sealing cover (4) is in clearance fit with the output gear shaft (2);
the outer ring of the bearing sealing cover (4) is higher than the inner ring of the bearing sealing cover (4), an inward-bent rolling opening is formed in the upper end of the outer ring of the bearing sealing cover (4), the rolling opening is in interference fit with the end face of the outer ring of the bearing (3), and the outer ring of the bearing sealing cover (4) is in interference fit with the mounting hole of the output box body (1);
the adjusting pad (5) is in interference fit with the output gear shaft (2), and the upper surface of the adjusting pad (5) is abutted to the lower end face of the bearing sealing cover (4) so as to axially position the bearing sealing cover (4).
2. The yaw gearbox output end sealing structure according to claim 1, wherein the radial clearance value between the bearing sealing cover (4) and the output gear shaft (2) is 1-2 mm.
3. The yaw gearbox output end sealing structure according to claim 2, characterized in that the output gear shaft (2) is provided with a transition conical surface with an inclination angle of 45 degrees, which is used for matching with the bearing sealing cover (4), and the axial distance of the transition conical surface is 1/2 of the radial clearance value.
4. The yaw gearbox output end sealing structure according to claim 1, characterized in that the inner ring of the adjusting pad (5) is provided with a chamfer having a size 0.5-1mm larger than the size of the transition fillet of the output gear shaft (2).
5. A yaw gearbox output end sealing structure according to any one of claims 1-4, characterized in that the bearing sealing cover (4) is a rolled edge stamping.
6. The yaw gearbox output end sealing structure according to claim 5, wherein the lap mouth of the bearing sealing cover (4) is a hardened surface.
7. A yaw gearbox output end sealing structure according to any one of claims 1-4, characterized in that the surface of the adjustment pad (5) is a hardened surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123435423.0U CN216589868U (en) | 2021-12-30 | 2021-12-30 | Sealing structure for output end of yaw gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123435423.0U CN216589868U (en) | 2021-12-30 | 2021-12-30 | Sealing structure for output end of yaw gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216589868U true CN216589868U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123435423.0U Active CN216589868U (en) | 2021-12-30 | 2021-12-30 | Sealing structure for output end of yaw gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216589868U (en) |
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2021
- 2021-12-30 CN CN202123435423.0U patent/CN216589868U/en active Active
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