CN211117583U - Sealing structure - Google Patents
Sealing structure Download PDFInfo
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- CN211117583U CN211117583U CN201921851393.1U CN201921851393U CN211117583U CN 211117583 U CN211117583 U CN 211117583U CN 201921851393 U CN201921851393 U CN 201921851393U CN 211117583 U CN211117583 U CN 211117583U
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- sealing ring
- shaft
- shaft hole
- ring
- seal
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Abstract
An embodiment of the present application provides a sealing structure, sealing structure includes: the transparent cover is provided with a first shaft hole and a second shaft hole which are coaxial; the first sealing ring is arranged on the inner wall of the second shaft hole and is coaxial with the second shaft hole; the second sealing ring is arranged on the inner wall of the second shaft hole and is coaxial with the first sealing ring; the shaft sleeve is coaxially arranged with the second sealing ring; the third sealing ring is arranged on the outer wall of the shaft sleeve and is coaxial with the shaft sleeve; the fourth sealing ring is arranged on the outer wall of the shaft sleeve and is coaxial with the third sealing ring; the shaft sleeve sequentially penetrates through the first shaft hole, the first sealing ring and the second sealing ring. This application has realized preventing to leak, strengthens sealed effect.
Description
Technical Field
The application relates to the technical field of gear boxes, in particular to a sealing structure.
Background
The gear box is an important part widely applied to mechanical transmission, relative movement parts in the box body need to be lubricated when the gear box operates, shaft ends of the gear box are subjected to sealing treatment, lubricating oil can be prevented from leaking, and external dust can be prevented from entering the gear box.
The labyrinth seal is a seal which has a plurality of tortuous small chambers between a rotating part and a fixed part to reduce leakage, and is widely applied to the seal of a gear box due to the characteristics of high temperature, high pressure and high rotating speed frequency, but the conventional labyrinth seal needs to divide a transparent cover into two semicircles for convenient installation, the semicircular joint surface has oil leakage risk, and the sealing effect is general.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide a seal structure for realize the labyrinth seal of integral lid thoroughly, avoid the lid thoroughly and appear the faying face oil leak, strengthened sealed effect.
A first aspect of an embodiment of the present application provides a sealing structure, including: the transparent cover is provided with a first shaft hole and a second shaft hole which are coaxial, and the aperture of the second shaft hole is larger than that of the first shaft hole; the first sealing ring is arranged on the inner wall of the second shaft hole and is coaxially arranged with the second shaft hole; the second sealing ring is arranged on the inner wall of the second shaft hole and is coaxial with the first sealing ring; the shaft sleeve is coaxially arranged with the second sealing ring; the third sealing ring is arranged on the outer wall of the shaft sleeve and is coaxial with the shaft sleeve; the fourth sealing ring is arranged on the outer wall of the shaft sleeve and is coaxial with the third sealing ring; the shaft sleeve sequentially penetrates through the first shaft hole, the first sealing ring and the second sealing ring, wherein the bore diameter of the first shaft hole is respectively larger than the outer diameter of the third sealing ring and the outer diameter of the fourth sealing ring; the inner diameter of the first seal ring is smaller than the outer diameter of the third seal ring and larger than the outer diameter of the fourth seal ring; the inner diameter of the second sealing ring is smaller than the outer diameter of the fourth sealing ring.
In one embodiment, the sealing structure further includes: and the fifth sealing ring is arranged on the outer wall of the shaft sleeve and is coaxially arranged with the shaft sleeve.
In one embodiment, the outer diameter of the fifth sealing ring is larger than the diameter of the first shaft hole.
In an embodiment, the transparent cover is provided with a third shaft hole, and the third shaft hole is coaxial with the first shaft hole.
In one embodiment, the diameter of the third shaft hole is larger than the outer diameter of the fifth sealing ring.
In one embodiment, the shaft extends through the sleeve.
In one embodiment, the bearing is sleeved on the rotating shaft.
In one embodiment, the distance ring is sleeved on the rotating shaft and located between the bearing and the transparent cover.
In an embodiment, the inner diameter of the distance ring is smaller than the outer diameter of the bearing and larger than the bore diameter of the third shaft hole.
In an embodiment, an axial distance between the third seal ring and the fourth seal ring along the shaft sleeve is smaller than an axial distance between the third seal ring and the fifth seal ring along the shaft sleeve.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a seal structure according to an embodiment of the present application;
fig. 2 is a partially enlarged schematic view of a sealing structure according to an embodiment of the present application.
Reference numerals:
100-sealing structure, 110-transparent cover, 111-first shaft hole, 112-second shaft hole, 113-third shaft hole, 114-first sealing ring, 115-second sealing ring, 120-shaft sleeve, 121-third sealing ring, 122-fourth sealing ring, 123-fifth sealing ring, 130-box body, 140-rotating shaft, 150-bearing, 160-distance ring, 101-first radial gap, 102-second radial gap, 103-third radial gap, and 104-fourth radial gap.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
In the description of the present application, the terms "first," "second," and the like are used for distinguishing between descriptions and do not denote an order of magnitude, nor are they to be construed as indicating or implying relative importance.
In the description of the present application, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are absolutely required to be horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer", and the like refer to orientations or positional relationships that are based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally found in the products of the application, and are used for convenience in describing the present application, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present application.
In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Please refer to fig. 1, which is a schematic structural diagram of a sealing structure 100 according to an embodiment of the present application, including a transparent cover 110, a shaft sleeve 120, a first sealing ring 114, a second sealing ring 115, a third sealing ring 121, and a fourth sealing ring 122. The transparent cover 110 is a stepped structure, a first shaft hole 111 and a second shaft hole 112 which are coaxial are formed in the transparent cover 110, and the diameter of the second shaft hole 112 is larger than that of the first shaft hole 111. The first seal ring 114 is attached to the inner wall of the second shaft hole 112 and is disposed coaxially with the second shaft hole 112. The second seal ring 115 is attached to the inner wall of the second shaft hole 112 and is disposed coaxially with the first seal ring 114.
The sleeve 120 is a cylindrical structural body, is provided coaxially with the second seal ring 115, and passes through the first shaft hole 111, the first seal ring 114, and the second seal ring 115 in this order. The third packing 121 is coupled to an outer wall of the boss 120 and is coaxially disposed with the boss 120. The fourth packing 122 is coupled to the outer wall of the boss 120 and is coaxially disposed with the third packing 121.
The bore diameter of the first shaft hole 111 is larger than the outer diameter of the third seal ring 121 and the outer diameter of the fourth seal ring 122, respectively, the inner diameter of the first seal ring 114 is smaller than the outer diameter of the third seal ring 121 and larger than the outer diameter of the fourth seal ring 122, and the inner diameter of the second seal ring 115 is smaller than the outer diameter of the fourth seal ring 122.
In an embodiment, the transparent cover 110 further has a third shaft hole 113, the third shaft hole 113 is coaxially disposed with the first shaft hole 111, the outer wall of the shaft sleeve 120 is further connected with a fifth sealing ring 123, the fifth sealing ring 123 is coaxially disposed with the shaft sleeve 120, an outer diameter of the fifth sealing ring 123 is larger than an outer diameter of the first shaft hole 111, and an outer diameter of the third shaft hole 113 is larger than an outer diameter of the fifth sealing ring 123.
In one embodiment, the sealing structure 100 further comprises: a case 130, a rotation shaft 140, a bearing 150, and a distance ring 160. The transparent cover 110 is detachably mounted on the outer surface of the box 130, and in one embodiment, the transparent cover 110 is fastened to the outer surface of the box 130 by bolts. The rotation shaft 140 passes through the boss 120 and is interference-fitted with the boss 120. The bearing 150 is sleeved on the rotating shaft 140 and is in transition fit with the rotating shaft 140, and the bearing 150 is located below the shaft sleeve 120. The distance ring 160 is sleeved on the rotating shaft 140 and disposed between the bearing 150 and the transparent cover 110, and the inner diameter of the distance ring 160 is smaller than the outer diameter of the bearing 150 and larger than the bore diameter of the third shaft hole 113.
In an embodiment, when the gearbox is started, the rotating shaft 140 drives the shaft sleeve 120, the third sealing ring 121, the fourth sealing ring 122 and the fifth sealing ring 123 which are arranged on the shaft sleeve 120 to rotate together, the rotating third sealing ring 121, the rotating fourth sealing ring 122 and the rotating fifth sealing ring 123 form an axial labyrinth with a series of throttling gaps and an expansion cavity together with the stationary transparent cover 110, the first sealing ring 114 and the second sealing ring 115, and a sealed medium can generate a throttling effect when passing through the gaps of the labyrinth, so that a leakage-blocking effect is achieved.
As shown in fig. 2, which is a partially enlarged schematic view of the sealing structure 100 according to an embodiment of the present application, the transparent cover 110 is provided with a first shaft hole 111, a second shaft hole 112, and a third shaft hole 113, which are coaxial, and the diameters of the second shaft hole 112 and the third shaft hole 113 are both larger than the diameter of the first shaft hole 111. The inner wall of the second shaft hole 112 is connected with a first sealing ring 114 and a second sealing ring 115, the second sealing ring 115 is arranged above the first sealing ring 114, the first sealing ring 114 and the second shaft hole 112 are coaxially arranged, and the second sealing ring 115 and the first sealing ring 114 are coaxially arranged.
The outer wall of the shaft sleeve 120 is connected with a third sealing ring 121, a fourth sealing ring 122 and a fifth sealing ring 123, the third sealing ring 121 is arranged between the fourth sealing ring 122 and the fifth sealing ring 123, and the third sealing ring 121, the fourth sealing ring 122 and the fifth sealing ring 123 are all arranged coaxially with the shaft sleeve 120.
The outer diameter of the fourth seal ring 122 is larger than the inner diameter of the second seal ring 115 and smaller than the inner diameter of the first seal ring 114; the outer diameter of the third seal ring 121 is larger than the inner diameter of the first seal ring 114 and smaller than the diameter of the first shaft hole 111; the outer diameter of the fifth seal ring 123 is larger than the diameter of the first shaft hole 111 and smaller than the diameter of the third shaft hole 113.
In one embodiment, the first seal ring 114 and the second seal ring 115 are welded to the inner wall of the second shaft hole 112, and the third seal ring 121, the fourth seal ring 122 and the fifth seal ring 123 are welded to the outer wall of the bushing 120.
In one embodiment, the axial distance between the third seal ring 121 and the fourth seal ring 122 along the shaft sleeve 120 is smaller than the axial distance between the third seal ring 121 and the fifth seal ring 123 along the shaft sleeve 120. Therefore, the oil return space formed between the first seal ring 114, the third seal ring 121 and the transparent cover 110 is large, and the lubricating oil is not easy to enter the space formed by the first seal ring 114 and the second seal ring 115, and can flow back to the inside of the gear box in time.
In one embodiment, a first radial gap 101 is disposed between the fifth seal ring 123 and the inner wall of the third shaft hole 113, a second radial gap 102 is disposed between the third seal ring 121 and the inner wall of the first shaft hole 111, a third radial gap 103 is disposed between the fourth seal ring 122 and the first seal ring 114, and a fourth radial gap 104 is disposed between the second seal ring 115 and the outer wall of the sleeve 120.
In one embodiment, the first radial gap 101 and the fourth radial gap 104 have the same width, which is 2 to 3 mm, and the second radial gap 102 and the third radial gap 103 have the same width, which is 5 mm.
The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A sealing structure, comprising:
the transparent cover is provided with a first shaft hole and a second shaft hole which are coaxial, and the aperture of the second shaft hole is larger than that of the first shaft hole;
the first sealing ring is arranged on the inner wall of the second shaft hole and is coaxially arranged with the second shaft hole;
the second sealing ring is arranged on the inner wall of the second shaft hole and is coaxial with the first sealing ring;
the shaft sleeve is coaxially arranged with the second sealing ring;
the third sealing ring is arranged on the outer wall of the shaft sleeve and is coaxial with the shaft sleeve;
the fourth sealing ring is arranged on the outer wall of the shaft sleeve and is coaxial with the third sealing ring;
the shaft sleeve sequentially penetrates through the first shaft hole, the first sealing ring and the second sealing ring, wherein the bore diameter of the first shaft hole is respectively larger than the outer diameter of the third sealing ring and the outer diameter of the fourth sealing ring; the inner diameter of the first seal ring is smaller than the outer diameter of the third seal ring and larger than the outer diameter of the fourth seal ring; the inner diameter of the second sealing ring is smaller than the outer diameter of the fourth sealing ring.
2. The seal structure of claim 1, further comprising:
and the fifth sealing ring is arranged on the outer wall of the shaft sleeve and is coaxially arranged with the shaft sleeve.
3. The seal structure of claim 2, wherein an outer diameter of the fifth seal ring is larger than a bore diameter of the first shaft bore.
4. The seal structure of claim 2, wherein the transparent cover defines a third axial hole, and the third axial hole is coaxial with the first axial hole.
5. The seal structure of claim 4, wherein a bore diameter of the third shaft bore is larger than an outer diameter of the fifth seal ring.
6. The seal structure of claim 5, further comprising:
a rotating shaft passing through the bushing.
7. The seal structure of claim 6, further comprising:
the bearing is sleeved on the rotating shaft.
8. The seal structure of claim 7, further comprising:
and the distance ring is sleeved on the rotating shaft and is positioned between the bearing and the transparent cover.
9. The seal structure of claim 8, wherein an inner diameter of the distance ring is smaller than an outer diameter of the bearing and larger than a bore diameter of the third shaft bore.
10. The seal structure of claim 2, wherein an axial distance between the third seal ring and the fourth seal ring along the bushing is less than an axial distance between the third seal ring and the fifth seal ring along the bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921851393.1U CN211117583U (en) | 2019-10-30 | 2019-10-30 | Sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921851393.1U CN211117583U (en) | 2019-10-30 | 2019-10-30 | Sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211117583U true CN211117583U (en) | 2020-07-28 |
Family
ID=71690568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921851393.1U Active CN211117583U (en) | 2019-10-30 | 2019-10-30 | Sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211117583U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013023A (en) * | 2020-08-28 | 2020-12-01 | 陕西航空电气有限责任公司 | Bearing lubricating oil sealing structure |
-
2019
- 2019-10-30 CN CN201921851393.1U patent/CN211117583U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013023A (en) * | 2020-08-28 | 2020-12-01 | 陕西航空电气有限责任公司 | Bearing lubricating oil sealing structure |
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