CN217874098U - Sealing structure for gearbox and gearbox comprising same - Google Patents
Sealing structure for gearbox and gearbox comprising same Download PDFInfo
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- CN217874098U CN217874098U CN202222121799.2U CN202222121799U CN217874098U CN 217874098 U CN217874098 U CN 217874098U CN 202222121799 U CN202222121799 U CN 202222121799U CN 217874098 U CN217874098 U CN 217874098U
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- ring gear
- seal
- ring
- gear body
- oil
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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 relates to a seal structure for gear box, the gear box includes the ring gear and includes the oil bath that is close to the lateral wall of ring gear, this lateral wall has internal surface and opposite surface, the ring gear is including the ring gear body that is equipped with a plurality of mounting holes, ring gear body is in the surface and another corresponding wall side of the ascending two sides difference joint oil bath of axial direction, and through passing the lateral wall of oil bath and pass the fastener that the mounting hole extends to in another wall side and fasten in the gear box, seal structure is including setting up respectively between one in two sides of ring gear body and the surface and set up the sealing washer portion of holding between another and another corresponding wall side in two sides of ring gear body, each sealing washer portion of holding all extends around the mounting hole, and all hold the sealing washer in each sealing washer portion of holding. The utility model discloses still relate to a gear box including above-mentioned seal structure. The utility model discloses can realize reduction in production cost and shelf life when sealed.
Description
Technical Field
The utility model relates to a seal structure for gear box and relate to a gear box, especially half direct drive gear box including this kind of seal structure.
Background
Gearboxes are widely used in the prior art, in particular in the field of wind power generation. With the rise in the market for semi-direct drive gearboxes, the gearboxes are directly connected to generators, in particular wind generators. The position of the oil sump for containing lubricating oil in the gearbox is thus correspondingly moved to the middle of the gearbox. For the assembly of the gearbox, it is often necessary to fasten the ring gear by means of studs penetrating the inner wall of the oil sump location and passing through the ring gear, where the bolted connections run the risk of oil leakage.
Generally, sealing is performed at the bolt end at the connection of the bolt in the oil sump to prevent oil in the oil sump from leaking to the outside of the oil sump via the end of the stud bolt, and specifically, oil in the oil sump spreads via the screw of the stud bolt and drips into and leaks along a gap between the ring gear and the outer wall of the oil sump to other undesired positions. As an example, at the end of the bolt, a combination of a profiled washer and two non-standard sealing rings is generally employed, wherein the profiled washer is located between a nut screwed to the end of the bolt and the wall of the oil sump to receive the nut, then one sealing ring is provided at the profiled washer to seal the gap between the profiled washer and the inner wall of the oil sump and the other sealing ring is used to seal a possible gap between the nut and the bolt. However, since studs of different diameters may be used at different positions, the seal rings at different positions cannot be manufactured to standard sizes in a consistent manner, which results in various specifications of seal rings for sealing, increased cost, and prolonged shelf life.
It is therefore desirable to be able to effect sealing of bolts or other fixed components for fixing a ring gear at locations associated with an oil sump by standardised sealing components (e.g. sealing rings), so that sealing can be effected by dimensionally stable standardised sealing components whilst reducing the reliance on the production of multiple types of sealing components, thereby reducing production costs and hence the shelf life required for producing multiple types of sealing components.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a seal structure for gear box and including this kind of seal structure's gear box for can realize the sealed of the fixed part who is used for fixed ring gear through standardized seal part, thereby reduce the reliance to producing multiple model seal part, and then reduction in production cost and shelf life.
According to a first aspect of the present invention, there is provided a seal structure for a gear case, the gear case including a ring gear and an oil pool for containing lubricating oil, the oil pool including a side wall close to one side of the ring gear, the side wall having an inner surface for contacting lubricating oil and an opposite outer surface, the ring gear including a ring gear body, a plurality of mounting holes being provided in the ring gear body to be spaced from each other in a circumferential direction and to penetrate the ring gear body in an axial direction, both sides of the ring gear body in an axial direction respectively engaging the outer surface of the side wall of the oil pool and another corresponding wall side surface provided opposite to the outer surface of the side wall, and being fastened in the gear case by a fastener passing through the side wall of the oil pool and extending into the other wall side surface, the seal structure including seal ring accommodating portions provided between one of the both sides of the ring gear body and the outer surface of the side wall and between the other of the both sides of the ring gear body and the other corresponding wall side surface, each seal ring accommodating portion extending around the mounting hole, and seal rings preventing leakage of oil in the oil pool at the fastener being accommodated in each of the seal ring accommodating portion.
Further, the fasteners are studs which pass through the side walls of the oil sump and through mounting holes in the ring gear to be fixedly attached in blind threaded holes in the side of the other respective wall.
Further, the stud bolts are not provided with any seal at the nut fixing of the inner surface of the oil sump in the gearbox.
Further, the seal ring accommodating portions each include an annular portion provided in one side surface of the ring gear body and an annular portion provided in the other corresponding wall side surface.
Further, the seal ring accommodating portions are all arranged on the gear ring
Further, the seal ring housing further includes annular portions provided on an outer surface of the side wall of the oil pool and another corresponding wall side, respectively, the annular portions being located corresponding to the seal ring housing on the ring gear to cooperate with the seal ring housing on the ring gear.
Further, all the seal ring accommodating portions are the same in size and all the seal rings are also the same in size.
Further, the seal structure includes, for each mounting hole, a plurality of seal ring receiving portions on both sides of the ring gear body, respectively, and seal rings received therein, respectively, the plurality of seal ring receiving portions being disposed radially spaced relative to each other on each side of the ring gear body and each being disposed concentrically or eccentrically about the respective mounting hole.
Further, a plurality of seal rings are accommodated in each seal ring accommodating portion in parallel in the axial direction.
According to another aspect of the present invention, a gear box is provided, the gear box comprising a sealing structure as described above, the sealing structure being arranged around each mounting hole of a gear ring of the gear box.
With the help of the utility model provides a gear box that is used for seal structure of gear box and includes this kind of seal structure, can realize the sealed of bolt or other fixed part that are used for fixed ring gear in the position department that is correlated with the oil bath through standardized seal part (for example sealing washer), make can reduce the reliance to producing multiple model seal part through the stable standard seal part of size when realizing sealed, and then reduction in production cost and consequently shortened the shelf life that needs owing to produce multiple model seal part.
Drawings
Other notable features and advantages of the present invention derive from the following non-limiting description provided for illustrative purposes with reference to the following drawings, in which:
fig. 1 shows a schematic cross-sectional view of a sealing structure for a gearbox according to an embodiment of the present invention.
Detailed Description
First, for convenience of description, the positions and directions in the present invention are defined as follows: the axial direction corresponds to the thickness direction of the ring gear in the gearbox, the radial direction is perpendicular to the axial direction and corresponds to the diameter direction of the ring gear and the circumferential direction corresponds to the circumferential direction of the ring gear.
Fig. 1 shows a schematic cross-sectional view of a sealing structure 100 for a gearbox according to an embodiment of the present invention. Further, fig. 1 shows a partial schematic cross-sectional view of a location in a gear box where sealing is performed using a sealing structure 100.
As shown in fig. 1, the gearbox 1 comprises a ring gear 102 and an oil sump 103 for containing lubricating oil. The oil sump 103 includes a side wall 104 adjacent one side of the ring gear 102, the side wall 104 having an inner surface 105 for contacting lubricating oil and an opposite outer surface 106. The ring gear 102 includes a ring gear body in which a plurality of mounting holes 107 are provided that are spaced from each other in the circumferential direction and that penetrate the ring gear body in the axial direction. When the ring gear 102 is mounted to the gearbox 1, the two side faces 108, 108' of the ring gear body in the axial direction engage the outer surface 106 of the side wall of the oil sump 106 and another corresponding wall side 109 arranged opposite this outer surface 106, respectively, so that the oil sump 103, the ring gear 102 and the other corresponding wall side 109 are arranged in succession, sandwiching the ring gear 102 between the outer surface 106 of this side wall 104 of the oil sump 103 and the other corresponding wall side 109.
It should be understood that the other corresponding wall side 109 actually refers to a wall side for clamping the fixed ring gear 102 in the axial direction together with the outer surface 106 of the side wall 104 of the oil reservoir 103 at a position opposite to the outer surface 106. The further corresponding wall side 109 may be a wall side on another component in the gearbox 1. As will be appreciated by those skilled in the art, the other respective wall side 109 may belong to a different gearbox component for a different gearbox configuration. Therefore, in the present invention, the specific belonging component of the other corresponding wall side 109 is not limited as long as it can cooperate with the outer surface 106 of the side wall of the oil sump to realize the respective clamping of the two sides of the ring gear body in the axial direction. Further, the plurality of mounting holes 107 spaced apart from each other in the circumferential direction may be spaced apart at a uniform interval or may be spaced apart at an irregular interval. Further, the number of the plurality of mounting holes 107 may be any number, such as 2, 3, 4, 5, 6, 7, or even more.
In one embodiment of the invention, the ring gear 102 is fastened in the gearbox 1 by means of a fastener 110 extending through a side wall 104 of the oil sump 103 and through a mounting hole 107 in the ring gear 102 to another corresponding wall side 109. As mentioned above, in the scope of the present invention, the ring gear 102 is fixedly arranged relative to the housing of the gearbox 1. In this case, when the ring gear 102 is clamped between the other corresponding wall side 109 and the outer surface 106 of the side wall 104 of the oil reservoir 103, it is necessary to fix the ring gear to ensure its stable position.
By way of example, the fasteners 110 are studs that are fixedly attached through the inner 105 and outer 106 surfaces of the side walls of the oil sump and through one of the mounting holes 107 in the ring gear 102 to a blind threaded hole 113 in the other respective wall side 109. Although the fastener 110 is illustratively described in the present disclosure as a stud, it should be understood by one skilled in the art that the fastener may be any suitable fastener that ensures that the ring gear 102 is fixedly clamped between the other respective wall side 109 and the outer surface 106 of the side wall 104 of the oil sump 103.
Further, it should be understood that, in the above-described configuration of the present invention, since the fastener (or the stud bolt as described above) passes through the side wall 104 of the oil pool 103, the lubricating oil in the oil pool 103 can flow and permeate along the fastener 110 itself through the gap existing at the position where the fastener 110 passes through the side wall 104. In the above-described configuration, since the fastener 110 extends into the other corresponding wall side 109 (i.e., there is a blind-hole receiving configuration in the other corresponding wall side 109 for receiving the fastener 110 and not extending through the other corresponding wall side 109, such as a blind threaded hole 113 in the other corresponding wall side 109 for fixedly connecting a stud in the case where the fastener 110 is a stud), a sealing end portion for the fastener 110 may be formed in the other corresponding wall side 109 so that lubricating oil does not further axially leak along the fastener 110. In this case, a gap or clearance allowing further radial leakage of lubricating oil exists only between the ring gear 102 itself and the other corresponding wall side 109 and the outer surface 106 of the side wall 104 of the oil sump 103 over the entire axial direction length of the fastener 110. In other words, along the entire axial length of the fastener 110, lubricating oil can only leak radially further in the gap between the ring gear body (i.e., the side of the ring gear in the axial direction) and the outer surface 106 of the other respective wall side 109 and the side wall of the oil sump.
Therefore, in order to prevent the lubricating oil in the oil pool from leaking radially along the fastener 110 via the gap between the ring gear body and the other corresponding wall side 109 and the outer surface 106 of the side wall of the oil pool, in the embodiment shown in fig. 1, a sealing structure 100 is provided in the gear box: which includes seal ring accommodation portions 111 respectively provided between both side surfaces 108, 108' of the ring gear body and the outer surface 106 of the side wall and the other corresponding wall side surface 109, and seal rings 112 accommodated in the seal ring accommodation portions 111 to prevent oil in the oil pool from leaking at the fastening members, each seal ring accommodation portion 111 being provided around the mounting hole 107.
As shown in fig. 1, the arrangement of the individual sealing ring receptacles 111 around the mounting hole is to be understood to mean that each sealing ring receptacle 111 is arranged concentrically or eccentrically around a respective mounting hole 107. As described above, the sealing structure 100 of the present invention practically sealingly blocks the possibility of radial leakage of lubricating oil along the fastener 110 via the gap between the ring gear body and the other respective wall side 109 and the outer surface 106 of the side wall of the oil sump, so that lubricating oil can only flow at most into the other respective wall side 109 in the axial direction along the fastener 110 itself, without further radial leakage. In other words, the sealing structure 100 of the present invention actually blocks these possible intermediate leakage paths, respectively, depending on the possible leakage paths of the lubricating oil.
Since these leakage paths also exist only at the mounting hole 107 of the ring gear 102, radial sealing of this gap or clearance can be achieved by the seal ring accommodation portions 111 provided with the accommodation seal rings 112, each surrounding the mounting hole 107 of the ring gear 102, thereby sealing and blocking all possible intermediate leakage paths of the lubricating oil. In fact, as is well known to those skilled in the art, in a gearbox, sealing is typically performed at the point where the fastener 110 penetrates the side wall 104 of the sump (i.e., to seal the initial leakage point of the oil, i.e., the end seal) to prevent leakage of oil, however such conventional sealing arrangements cannot be uniformly constructed as the same standard due to the need to accommodate different fastener types (e.g., fastener diameters, gap sizes, etc.). However, by providing the packing around the mounting hole, it is possible to select the packing (i.e., the packing receiving portion) to be of a size large enough to construct all the packing 112 as a standard piece in a single and same size, so that the production cost and the shelf life can be greatly reduced.
As described above, the seal ring accommodating portions 111 are provided between the two side surfaces 108, 108' of the ring gear body and the outer surface of the oil pool side wall and the other corresponding wall side surface, respectively. As an example, as shown in fig. 1, the seal ring housing portion 111 may include an annular portion (surrounding the mounting hole) provided in one side surface 108 of the two side surfaces of the ring gear body and an annular portion (also surrounding the mounting hole 107 and having the same size as previously described) provided in the other corresponding wall side surface 109 in the vicinity of the other side surface 108' of the two side surfaces of the ring gear body.
Although the position and configuration of the seal ring accommodating portion 111 are specifically described above by way of example, these are not limitative. Those skilled in the art will appreciate that the seal ring receiving portion can be provided at any suitable location, such as various combinations of only being provided on both sides of the ring gear body (i.e., all and only on the ring gear), one on the outer surface of the side wall and the other on the other corresponding wall side, one on the outer surface of the side wall and the other on one of the two sides of the ring gear body that faces away from the outer surface, and so forth, respectively. Even more, it is conceivable to provide the two flanks 108, 108' of the ring gear body, the outer surface 106 of the side wall and the other respective wall flank 109 with annular portions aligned with one another, so that two of these four annular portions directly facing one another can be combined appropriately to form the sealing ring receptacle. That is, the outer surface and the other wall side of the side wall of the oil pool in the gear box, which face the two sides of the ring gear body, respectively, are also provided with seal ring accommodating portions at positions corresponding to the seal ring accommodating portions of the ring gear to constitute annular portions for receiving the seal rings 112 with the seal ring accommodating portions 111 on the ring gear.
It should be understood that no matter where the seal ring accommodating portion 111 is provided, it is respectively concentrically or eccentrically provided around the mounting hole 107. As described above, since the seal structure of the present invention is capable of sealing and blocking all possible intermediate leakage paths of the lubricating oil, the fastener 110 (illustratively a stud bolt) does not require any sealing members to be applied at the fixed location (nut fixed in the case of a stud bolt) of the inner surface 105 of the sump 103 in the gearbox. This makes it possible to achieve the object of preventing leakage of lubricating oil by the seal structure 100 of the present invention without producing seals of non-uniform size. In some cases, the sealing structure 100 of the present invention can be used in combination with a sealing member of the prior art that is disposed in the oil sump at a through position of the oil sump.
As described above, all the seal ring receptacles are of the same size and therefore the seal rings are also of the same size. That is, all the seal rings can be produced as the same standard. Further, the sealing ring can be made of any suitable elastomeric material, so that when the ring gear is mounted to the gearbox, the sealing ring can seal possible gaps existing between the two sides of the ring gear body and the outer surface of the side wall of the oil sump and the other wall side by elastic action, thereby ensuring the sealing effect.
Further, a single sealing ring 112 can be provided between both sides of the ring gear body and the outer surface 106 of the side wall and the other respective wall side 109, respectively, or two or even more concentrically or eccentrically arranged sealing rings 112 can be provided (correspondingly, sealing ring receptacles are provided between both sides of the ring gear body and the outer surface of the side wall and the other respective wall side, which receptacles each have any of the above-described configurations of the sealing ring receptacles). In other words, the seal structure 100 includes, for each mounting hole 107, a plurality of seal ring accommodating portions on both sides of the ring gear body, respectively, the plurality of seal ring accommodating portions being radially spaced relative to each other to form a plurality of concentric rings on each side of the ring gear body and each being concentrically or eccentrically disposed about the corresponding mounting hole 107, and the seal rings 112 accommodated therein, respectively. In this case, different size types of sealing rings are required, but these are also standard parts. Furthermore, it is contemplated that a plurality of seal rings may be axially juxtaposed in a single seal ring receiving portion to provide a more superior sealing effect.
Further, the sealing structure 100 further comprises an outer seal 120, the outer seal 120 comprising an outer seal ring receptacle provided between two sides of the ring gear body and the outer surface of the side wall of the oil sump and the other respective wall side, respectively, and an additional seal ring received in the outer seal ring receptacle, the outer seal ring receptacle being arranged in an annular shape around the central ring of the ring gear body around a plurality of mounting holes, i.e. the outer seal ring receptacle is configured in an annular shape around all mounting holes, in order to further improve the sealing action for the ring gear, in particular to further seal radial leakage paths of the lubricating oil. The material of the outer sealing ring may be the same as or different from the material of sealing ring 112. Of course, the outer seal 120 may also be configured to include a multi-turn annular shape disposed around a plurality of mounting holes (i.e., all of the mounting holes 107) concentrically or eccentrically about the center of the ring gear.
According to another aspect of the present invention, a gearbox 1 is proposed, the gearbox 1 comprising a sealing structure 100 as described above. As embodied by the invention, the gearbox 1 comprises a ring gear 102 and an oil sump 103 for containing lubricating oil, the oil sump 103 comprising a side wall 104 adjacent to one side of the ring gear, the side wall 104 having an inner surface 105 for contacting lubricating oil and an opposite outer surface 106, the ring gear 102 comprising a ring gear body in which a plurality of mounting holes 107 are provided, circumferentially spaced from each other and axially extending through the ring gear body, two sides 108, 108' of the ring gear body in the axial direction engaging the outer surface 106 of the side wall of the oil sump and another corresponding wall side 109 arranged opposite the outer surface 106 of the side wall, respectively, when the ring gear is mounted to the gearbox 1, and being fastened within the gearbox 1 by fasteners 110 extending through the side wall 104 of the oil sump 103 and through the mounting holes 107 in the ring gear 102 into the other wall side 109. The seal structure 100 is provided around each mounting hole 107 to prevent the lubricating oil in the oil pool from leaking through the fastener 110.
The above embodiments described in relation to the present invention are illustrative only and not limiting. It will be understood by those skilled in the art that various modifications may be made to the above embodiments in light of the present disclosure without departing from the scope of the present invention, and such modifications or equivalents also fall within the scope of the present invention.
Claims (10)
1. A sealing structure for a gear case including a ring gear and an oil pool for containing lubricating oil,
the oil sump includes a side wall adjacent one side of the ring gear, the side wall having an inner surface for contacting the lubricating oil and an opposite outer surface,
the ring gear includes a ring gear body in which a plurality of mounting holes are provided that are spaced from each other in the circumferential direction and that axially penetrate the ring gear body, both side surfaces of the ring gear body in the axial direction respectively engage the outer surface of the side wall of the oil sump and another corresponding wall side surface that is disposed opposite the outer surface, and the ring gear body is fastened within the gear case by a fastener that extends through the side wall of the oil sump and through the mounting hole into the other corresponding wall side surface,
characterized in that the seal structure includes seal ring accommodating portions respectively provided between one of the two side surfaces of the ring gear body and the outer surface of the side wall and between the other of the two side surfaces of the ring gear body and the other corresponding wall side surface, each seal ring accommodating portion extending around the corresponding mounting hole, a seal ring for preventing oil in the oil pool from leaking at the fastener being accommodated in each seal ring accommodating portion.
2. A seal structure for a gearbox according to claim 1, wherein said fastener is a stud bolt fixedly attached through said side wall of said oil sump and through said mounting hole into a blind threaded hole in the side of said other respective wall.
3. A seal structure for a gearbox according to claim 2, wherein said stud bolt is not provided with any seal at the nut fixing of said inner surface of said oil pool.
4. A seal structure for a gearbox according to any one of claims 1-3, wherein said seal ring housing portions each include an annular portion provided in said one side face of said ring gear body and an annular portion provided in said other corresponding wall side face.
5. A seal structure for a gearbox according to any one of claims 1-3, wherein the seal ring accommodating portions are each provided on the gear ring.
6. A seal structure for a gearbox according to claim 5, wherein said seal ring housing further comprises annular portions provided on the outer surface of the side wall of the oil pool and the other respective wall side, respectively, at positions corresponding to the seal ring housing provided on the ring gear to cooperate with the seal ring housing on the ring gear.
7. A sealing structure for a gearbox according to any one of claims 1-3, characterised in that all the seal ring accommodations are the same size and all the seal rings are the same size.
8. A sealing structure for a gearbox according to any of claims 1-3, characterised in that the sealing structure comprises for each mounting hole a plurality of sealing ring accommodations on both sides of the ring gear body, respectively, and sealing rings accommodated therein, respectively, which on each side of the ring gear body are arranged radially spaced relative to each other and each concentrically or eccentrically around the respective mounting hole.
9. A seal structure for a gearbox according to any one of claims 1-3, wherein a plurality of seal rings are housed in each seal ring housing in axial juxtaposition.
10. A gearbox comprising a sealing structure according to any one of claims 1-9 arranged around each mounting hole of a ring gear of the gearbox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222121799.2U CN217874098U (en) | 2022-08-12 | 2022-08-12 | Sealing structure for gearbox and gearbox comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222121799.2U CN217874098U (en) | 2022-08-12 | 2022-08-12 | Sealing structure for gearbox and gearbox comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217874098U true CN217874098U (en) | 2022-11-22 |
Family
ID=84078092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222121799.2U Active CN217874098U (en) | 2022-08-12 | 2022-08-12 | Sealing structure for gearbox and gearbox comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217874098U (en) |
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2022
- 2022-08-12 CN CN202222121799.2U patent/CN217874098U/en active Active
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