CN108119651B - Externally-mounted combined oil seal - Google Patents
Externally-mounted combined oil seal Download PDFInfo
- Publication number
- CN108119651B CN108119651B CN201711422739.1A CN201711422739A CN108119651B CN 108119651 B CN108119651 B CN 108119651B CN 201711422739 A CN201711422739 A CN 201711422739A CN 108119651 B CN108119651 B CN 108119651B
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- CN
- China
- Prior art keywords
- oil seal
- sealing
- supporting framework
- bending part
- lip
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
- F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
- F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention discloses an externally-mounted combined oil seal which comprises an outer oil seal, an inner oil seal, a first supporting framework, a first sealing element, a plate spring, a second supporting framework and a second sealing element, wherein the first supporting framework is arranged on the outer oil seal, a first shoulder is radially extended from the outer ring of the first supporting framework, the plate spring is arranged in the first sealing element, a first lateral lip and a second lateral lip are arranged on the side wall of the first sealing element, an auxiliary sealing lip and a first main sealing lip are arranged on the inner diameter of the first sealing element, a second supporting framework is arranged on the inner oil seal, a second bending part is arranged on the outer ring of the second supporting framework, a second main sealing lip is arranged on the inner ring of the second sealing element, the combination of two special-shaped oil seals is adopted to form a combined oil seal with multiple oil seal lips, a tight sealing space can be formed, the plate spring can compensate gaps generated due to abrasion, the sealing performance of the oil seal is greatly improved, and the installation and the disassembly are convenient.
Description
[ field of technology ]
The invention relates to the technical field of sealing elements, in particular to the technical field of an externally-mounted combined oil seal.
[ background Art ]
In order to prevent the engine oil from leaking, an oil seal is arranged on the part of the shaft extending out of the engine body, and a common method is to arrange an oil seal, wherein the oil seal generally has the function of isolating the parts needing to be lubricated in the transmission parts from the output parts so as not to leak the lubricating oil. The oil seal in the market is in an integral annular closed structure, and the integral sealing performance of the structure is good, the installation is convenient, but the online disassembly is difficult. When the rotary shaft is disassembled on line, a special tool is needed to pull the rotary shaft out of a narrow space between the sealing cavity and the rotary shaft, so that the rotary shaft is very difficult to damage. Therefore, the traditional standard framework oil seal is not suitable for the requirement of online replacement, and an externally-installed combined oil seal is now provided.
[ invention ]
The invention aims to solve the problems in the prior art, and provides an externally-mounted combined oil seal, which adopts the combination of two special-shaped oil seals to form a combined oil seal with multiple oil seal lips, can form a tight sealing space, can compensate gaps generated by abrasion by a plate spring, greatly improves the sealing performance of the oil seal, and is convenient to install and detach.
In order to achieve the above purpose, the invention provides an externally-mounted combined oil seal, which comprises an external oil seal, an internal oil seal, a first supporting framework, a first sealing piece, a plate spring, a second supporting framework and a second sealing piece, wherein the first supporting framework is arranged on the external oil seal, a first shoulder is radially extended on the outer ring of the first supporting framework, the first sealing piece is arranged on the first supporting framework, the plate spring is arranged in the first sealing piece, a first lateral lip and a second lateral lip are arranged on the side wall of the first sealing piece, an auxiliary sealing lip and a first main sealing lip are arranged on the inner diameter of the first sealing piece, the second supporting framework is arranged on the inner oil seal, a second bending part is arranged on the outer ring of the second supporting framework, a second sealing piece is arranged on the inner ring of the second supporting framework, a second main sealing lip is arranged on the inner ring of the second sealing piece, an arc-shaped sealing layer is arranged on the end face of the second sealing piece, and the first lateral lip, the second lateral lip and the arc-shaped sealing layer are tightly matched with the first lateral lip and the second lateral lip.
Preferably, the second supporting framework is further provided with a first bending part and a third bending part, the included angle between the cross section of the first bending part and the horizontal plane is 60 degrees, the end face of the first bending part is provided with an arc-shaped sealing layer, the outer ring of the first bending part is provided with a second bending part, the second bending part is tightly matched with the outer oil seal, the inner ring of the first bending part axially extends to form a third bending part, and the inner ring of the third bending part is fixedly provided with a second main sealing lip.
Preferably, the first supporting framework further comprises a reverse-shaped folded edge, the cross section of the reverse-shaped folded edge is U-shaped, a first shoulder is radially extended from the outer ring of the reverse-shaped folded edge, a first sealing layer is extended from the outer ring of the first sealing piece, and the first sealing layer is coated on the reverse-shaped folded edge.
Preferably, the cross section of the leaf spring is U-shaped, two branches of the leaf spring are respectively clamped on a first lateral lip and a second lateral lip, and the inner diameter of the second lateral lip is provided with a first main sealing lip.
Preferably, the inner oil seal is arranged on the inner side of the outer oil seal, and the outer oil seal and the inner oil seal are in interference fit.
The invention has the beneficial effects that: according to the invention, through the matching of the outer oil seal, the inner oil seal, the first supporting framework, the first sealing piece, the plate spring, the second supporting framework, the second sealing piece and the like, the combination of the two special-shaped oil seals is adopted, so that the combined oil seal with multiple oil seal lips is formed, the lateral lips are long and thin and have good elastic deformation performance, a tight sealing space can be formed, grease leakage is avoided, the plate spring can compensate gaps generated due to abrasion, the sealing performance of the oil seal is greatly improved, the first shoulder is arranged on the outer ring of the first supporting framework, the second bending part is arranged on the outer ring of the second supporting framework, the installation and the disassembly are facilitated, a sealing cavity can be pried out only by inserting a flat screwdriver between the first shoulder and an equipment end cover, then a blade is used for cutting rubber or other materials at the split position of the framework, the outer oil seal can be removed, and the second bending part on the inner oil seal is convenient for force application and disassembly.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic cross-sectional view of an externally mounted combination oil seal of the present invention;
FIG. 2 is a schematic cross-sectional view of an outer oil seal of a four-lip dust cap of an outer combination oil seal of the present invention;
FIG. 3 is a schematic cross-sectional view of an inner seal of a three-lip dust cap of an externally mounted combination oil seal of the present invention.
[ detailed description ] of the invention
Referring to fig. 1 to 3, the externally-mounted combined oil seal of the invention comprises an external oil seal 1, an internal oil seal 2, a first supporting framework 3, a first sealing element 4, a plate spring 5, a second supporting framework 6 and a second sealing element 7, wherein the first supporting framework 3 is arranged on the external oil seal 1, a first shoulder 311 radially extends from the outer ring of the first supporting framework 3, the first sealing element 4 is arranged on the first supporting framework 3, the plate spring 5 is arranged in the first sealing element 4, a first lateral lip 43 and a second lateral lip 44 are arranged on the side wall of the first sealing element 4, an auxiliary sealing lip 41 and a first main sealing lip 42 are arranged on the inner diameter of the first sealing element 4, the second supporting framework 6 is arranged on the internal oil seal 2, a second bending part 62 is arranged on the outer ring of the second supporting framework 6, a second main sealing lip 71 is arranged on the inner ring of the second supporting framework 7, a first lateral lip 72 and a second arc-shaped sealing layer 72 are tightly matched with the first lateral lip 43 and the second lateral lip 44. The second supporting framework 6 is further provided with a first bending part 61 and a third bending part 63, the included angle between the cross section of the first bending part 61 and the horizontal plane is 60 degrees, the end face of the first bending part 61 is provided with an arc-shaped sealing layer 72, the outer ring of the first bending part 61 is provided with a second bending part 62, the second bending part 62 is tightly matched with the outer oil seal 1, the inner ring of the first bending part 61 axially extends to form a third bending part 63, and the inner ring of the third bending part 63 is fixedly provided with a second main sealing lip 71. The first supporting framework 3 further comprises a reverse-shaped folded edge 31, the cross section of the reverse-shaped folded edge 31 is U-shaped, a first shoulder 311 radially extends from the outer ring of the reverse-shaped folded edge 31, a first sealing layer 45 extends from the outer ring of the first sealing piece 4, and the first sealing layer 45 is coated on the reverse-shaped folded edge 31. The cross section of the leaf spring 5 is U-shaped, two branches of the leaf spring 5 are respectively clamped on a first lateral lip 43 and a second lateral lip 44, and the inner diameter of the second lateral lip 44 is provided with a first main sealing lip 42. The inner oil seal 2 is arranged on the inner side of the outer oil seal 1, and the outer oil seal 1 and the inner oil seal 2 are in interference fit.
The working process of the invention comprises the following steps:
according to the externally-mounted combined oil seal, in the working process, the combination of the two special-shaped oil seals is adopted through the matching of the external oil seal, the internal oil seal, the first supporting framework, the first sealing piece, the plate spring, the second supporting framework and the second sealing piece, so that the combined oil seal with multiple oil seal lips is formed, the lateral lips are long and thin, good elastic deformation performance is achieved, a tight sealing space can be formed, grease leakage is avoided, the plate spring can compensate a gap generated due to abrasion, the sealing performance of the oil seal is greatly improved, a first shoulder is arranged on the outer ring of the first supporting framework, a second bending part is arranged on the outer ring of the second supporting framework, the installation and the disassembly are facilitated, a sealing cavity can be pried out only by inserting a flat-mouth screwdriver between the first shoulder and an equipment end cover, then rubber or other materials at the cutting-off positions of the frameworks are cut off by a blade, and the second bending part on the internal oil seal can be subjected to force drawing and disassembly by using a tool with an elbow.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (3)
1. An externally-mounted combined oil seal is characterized in that: the sealing device comprises an outer oil seal (1), an inner oil seal (2), a first supporting framework (3), a first sealing element (4), a plate spring (5), a second supporting framework (6) and a second sealing element (7), wherein the first supporting framework (3) is arranged on the outer oil seal (1), a first shoulder (311) is formed by radially extending an outer ring of the first supporting framework (3), the first sealing element (4) is arranged on the first supporting framework (3), the plate spring (5) is arranged in the first sealing element (4), a first lateral lip (43) and a second lateral lip (44) are arranged on the side wall of the first sealing element (4), an auxiliary sealing lip (41) and a first main sealing lip (42) are arranged on the inner diameter of the first sealing element (4), a second supporting framework (6) is arranged on the outer ring of the second supporting framework (6), a second bending part (62) is arranged on the inner ring of the second supporting framework (6), a second sealing element (7) is arranged on the inner ring of the second supporting framework, a second main sealing lip (71) is arranged on the second sealing element (7), and the second sealing element (72) is tightly matched with the second lateral lip (72); the second support framework (6) is further provided with a first bending part (61) and a third bending part (63), the included angle between the cross section of the first bending part (61) and the horizontal plane is 60 degrees, the end face of the first bending part (61) is provided with an arc-shaped sealing layer (72), the outer ring of the first bending part (61) is provided with a second bending part (62), the second bending part (62) is tightly matched with the outer oil seal (1), the inner ring of the first bending part (61) axially extends to form the third bending part (63), and the inner ring of the third bending part (63) is fixedly provided with a second main sealing lip (71); the first supporting framework (3) further comprises a return-shaped folded edge (31), the cross section of the return-shaped folded edge (31) is U-shaped, a first shoulder (311) is radially extended from the outer ring of the return-shaped folded edge (31), a first sealing layer (45) is extended from the outer ring of the first sealing piece (4), and the first sealing layer (45) is coated on the return-shaped folded edge (31).
2. An externally mounted combination oil seal as defined in claim 1 wherein: the cross section shape of the leaf spring (5) is U-shaped, two branches of the leaf spring (5) are respectively clamped on a first lateral lip (43) and a second lateral lip (44), and the inner diameter of the second lateral lip (44) is provided with a first main sealing lip (42).
3. An externally mounted combination oil seal as defined in claim 1 wherein: the inner oil seal (2) is arranged on the inner side of the outer oil seal (1), and the outer oil seal (1) and the inner oil seal (2) are in interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711422739.1A CN108119651B (en) | 2017-12-25 | 2017-12-25 | Externally-mounted combined oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711422739.1A CN108119651B (en) | 2017-12-25 | 2017-12-25 | Externally-mounted combined oil seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108119651A CN108119651A (en) | 2018-06-05 |
| CN108119651B true CN108119651B (en) | 2023-04-25 |
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ID=62231454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711422739.1A Active CN108119651B (en) | 2017-12-25 | 2017-12-25 | Externally-mounted combined oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108119651B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013242036A (en) * | 2012-04-27 | 2013-12-05 | Nsk Ltd | Sealing device and bearing unit with seal |
| CN103410973A (en) * | 2013-08-12 | 2013-11-27 | 湖北新置密封件有限公司 | Self-location type split framework oil seal |
| CN103574037B (en) * | 2013-12-04 | 2016-06-15 | 湖北新置密封件有限公司 | Fitted outside Double-lip framework oil sealing |
| CN205534227U (en) * | 2016-03-07 | 2016-08-31 | 河南佰路悍机械工业有限公司 | Split type framework oil seal |
| CN206522358U (en) * | 2016-08-31 | 2017-09-26 | 浙江新昌振新密封件有限公司 | A kind of improved combination formula closure |
| CN206129895U (en) * | 2016-08-31 | 2017-04-26 | 浙江新昌振新密封件有限公司 | Shield is glued in three lip areas of improvement type combined type |
| CN107355539A (en) * | 2017-08-11 | 2017-11-17 | 徐州华通浮动油封科技有限公司 | A kind of High-pressure oil sealing |
| CN208487207U (en) * | 2017-12-25 | 2019-02-12 | 浙江新昌振新密封件有限公司 | A kind of fitted outside combination oil seal |
-
2017
- 2017-12-25 CN CN201711422739.1A patent/CN108119651B/en active Active
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| Publication number | Publication date |
|---|---|
| CN108119651A (en) | 2018-06-05 |
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