CN114135674A - Dynamic seal structure for speed reducer - Google Patents
Dynamic seal structure for speed reducer Download PDFInfo
- Publication number
- CN114135674A CN114135674A CN202111447783.4A CN202111447783A CN114135674A CN 114135674 A CN114135674 A CN 114135674A CN 202111447783 A CN202111447783 A CN 202111447783A CN 114135674 A CN114135674 A CN 114135674A
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- Prior art keywords
- lip
- dynamic seal
- guide plate
- oil guide
- main
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 22
- 230000009467 reduction Effects 0.000 claims description 2
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 50
- 239000010687 lubricating oil Substances 0.000 abstract description 16
- 230000003116 impacting effect Effects 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- -1 polytetrafluoroethylene Polymers 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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
- F16J15/3268—Mounting of sealing 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
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention provides a dynamic seal structure for a speed reducer, which comprises a main body, an oil guide plate, a main lip and an auxiliary lip, wherein the main body is of an annular structure, the main lip, the auxiliary lip and the oil guide plate are all arranged on the main body, the main lip is positioned between the auxiliary lip and the oil guide plate, the main body comprises a front end part, a middle end part and a rear end part, and the middle end part is positioned between the front end part and the rear end part. According to the invention, the oil guide plate is additionally arranged on the outer side of the main lip, so that lubricating oil from an oil way is prevented from directly impacting the lip, and the lubricating oil is guided to enter the casing, the accumulation of the lubricating oil near the main lip of the dynamic seal is reduced, and the working failure of the dynamic seal is avoided to a certain extent; in addition, the front end part of the main body is provided with the threads, so that the movable seal is convenient to disassemble; according to the invention, the oil guide plate is integrated on the main body of the dynamic seal, and the oil guide plate is equivalently detached together when the dynamic seal device is detached, so that the oil guide plate is more convenient to maintain and replace.
Description
Technical Field
The invention belongs to the technical field of dynamic sealing, and particularly relates to a dynamic sealing structure for a speed reducer.
Background
The common dynamic seal of the helicopter speed reducer can be divided into a rubber lip seal and a polytetrafluoroethylene lip seal according to lip materials.
Common rubber lip-shaped sealing structures can be divided into an inner framework type, an outer framework type, an inner and outer framework type, a non-framework type and the like according to frameworks; in addition, the utility model can be divided into a single-lip structure and a double-lip structure according to the lip opening.
As shown in fig. 1, the conventional double-lip dynamic seal structure generally comprises a framework a, a spring b, a main lip c and an auxiliary lip 4, wherein the framework is used for enhancing the rigidity of the seal ring, which is beneficial to the stability of the structural size of the rubber seal ring and is convenient for assembly; meanwhile, the metal framework can keep the matching force of the sealing ring and the mounting hole and ensure that the lip is located at the correct position, the pressure resistance value of the lip-shaped sealing ring can be obviously changed, and the spring is used for hooping the lip to enable the lip to have proper radial force to a shaft so as to ensure that the lip has good sealing performance. Meanwhile, the lip can be automatically compensated after being worn. The main lip is the key part, the lip mouth plays a sealing role, and the waist part maintains the necessary elasticity to adapt to the eccentricity and the floating of the shaft.
At present, in the working process of a speed reducer, the temperature of a dynamic seal matching surface is overhigh, a dynamic seal lip is easy to carbonize, the lip and a working surface of a fitting are easy to wear, oil leakage and the like are easy to occur in the working process, and the maintenance and the use of a helicopter are influenced; for the structure with the oil return hole, the check ring cannot realize the oil guide function, and lubricating oil from an oil way is easy to impact a lip mouth, so that the oil leakage phenomenon is aggravated; and current sealed design exists not enoughly in the installation is dismantled, dismantles the in-process and easily seals to sealed fragile, and dynamic seal maintainability is poor.
Disclosure of Invention
In order to solve the problems, the invention provides a dynamic seal structure for a speed reducer, which achieves the purposes of reducing the oil leakage rate of the dynamic seal of the speed reducer of a helicopter and improving the reliability of the dynamic seal and the maintainability of the speed reducer.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dynamic seal structure for a speed reducer comprises a main body, an oil guide plate, a main lip and an auxiliary lip, wherein,
the main body is of an annular structure;
the main lip, the auxiliary lip and the oil guide plate are all arranged on the main body;
the main lip is located between the auxiliary lip and the oil guide plate.
Preferably, the body includes a front end, a middle end and a rear end, the middle end being located between the front end and the rear end.
Preferably, the front end part is of an annular structure, and an internal thread is arranged on the inner side surface of the front end part.
Preferably, well tip is cyclic annular structure, and the inboard is provided with the cross-section and is trapezoidal annular strip, the medial surface at annular strip is all installed to main lip and vice lip, vice lip setting is in the one side of being close to the front end portion, main lip setting is in the one side of being close to the rear end portion.
Preferably, the annular strip and the front end constitute a left annular cavity of which the cross section is the round platform, the left annular cavity is located on one side of the internal thread, and the annular strip and the oil guide plate constitute a right annular cavity of which the cross section is the round platform.
Preferably, main lip and vice lip are the loop configuration, the outside rigid coupling of vice lip is on the annular strip, and inboard bending towards tip one side before, the outside rigid coupling of main lip is on the annular strip, and inboard bending towards tip one side after.
Preferably, the lip mouth of the main lip is provided with a slit type groove.
Preferably, the rear end portion is of an annular structure, and the oil guide plate is fixedly connected to the inner side face of the rear end portion.
Preferably, the oil guide plate is of an annular structure, the cross section of the oil guide plate is L-shaped, the upper end of the L-shaped structure is fixedly connected with the rear end part, the tail end of the L-shaped structure faces to the side far away from the main lip, and the oil guide plate and the main lip are coaxially arranged.
Preferably, the main lip and the auxiliary lip are made of polytetrafluoroethylene materials.
Preferably, the outer side surface of the main body is provided with a dynamic seal mounting cover, and the dynamic seal mounting cover is fixedly connected with the main body.
The invention has the beneficial effects that:
1. according to the invention, the oil guide plate is additionally arranged on the outer side of the main lip, so that lubricating oil from an oil way is prevented from directly impacting the lip, and the lubricating oil is guided to enter the casing, the accumulation of the lubricating oil near the main lip of the dynamic seal is reduced, and the working failure of the dynamic seal is avoided to a certain extent;
2. according to the invention, the threads are arranged at the front end part of the main body, so that the tool and the threads can be matched together when the dynamic seal is disassembled, and then the tool is pulled to drive the whole dynamic seal device to move outwards, so that the dynamic seal is convenient to disassemble;
3. according to the invention, the oil guide plate is integrated on the main body of the dynamic seal, so that the oil guide plate and the dynamic seal device form an integral structure, and the oil guide plate is equivalently detached together when the dynamic seal device is detached, thereby facilitating the maintenance and replacement of the oil guide plate.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a schematic view of a dynamic seal of a prior art double lip configuration;
fig. 2 is a schematic structural view showing a dynamic seal structure for a speed reducer according to the present invention.
In the figure: 1. a main body; 101. a front end portion; 102. a middle end portion; 103. a rear end portion; 104. an annular strip; 105. an internal thread; 106. a left annular cavity; 107. a right annular cavity; 2. an oil guide plate; 3. a main lip; 4. the minor lip; 5. installing a cover; 6. slit type grooves.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A dynamic seal structure for a speed reducer, as shown in figure 1, comprises a main body 1, an oil guide plate 2, a main lip 3 and an auxiliary lip 4, wherein,
the main body 1 is in a ring structure;
the main lip 3, the auxiliary lip 4 and the oil guide plate 2 are all arranged on the main body 1;
the main lip 3 is located between the auxiliary lip 4 and the oil guide plate 2.
Further, the main body 1 includes a front end portion 101, a middle end portion 102, and a rear end portion 103, the middle end portion 102 being located between the front end portion 101 and the rear end portion 103.
In the above structure, the front end portion 101, the middle end portion 102 and the rear end portion 103 constitute an integral structure of the main body 1, and in use, the front end portion 101 is directly contacted with the outside air, and the rear end portion 103 is the side of the oil seal.
Further, the distal end portion 101 has an annular structure, and an internal thread 105 is provided on the inner surface thereof.
In the structure, the internal thread 105 can be connected with other external tools with threaded structures, and then the tools are pulled to pull the whole dynamic sealing structure, so that the dynamic sealing structure moves to the outside and is detached.
Further, the middle end portion 102 is of an annular structure, an annular strip 104 with a trapezoidal cross section is arranged on the inner side, the main lip 3 and the auxiliary lip 4 are both mounted on the inner side surface of the annular strip 104, the auxiliary lip 4 is arranged on the side close to the front end portion 101, and the main lip 3 is arranged on the side close to the rear end portion 103.
In the above-mentioned structure, main lip 3 mainly plays the effect of sealing oil, avoids the reduction gear during operation lubricating oil to reveal, and vice lip 4 mainly plays the effect that prevents the sand and dust entering cavity, has ensured the realization of 3 sealing functions of main lip indirectly.
Furthermore, one end of the annular strip 104 and the front end part 101 form a left annular cavity 106 with a circular truncated cone section, the left annular cavity 106 is located on one side of the internal thread 105, and the other end of the annular strip 104 and the oil guide plate 2 form a right annular cavity 107 with a circular truncated cone section.
Further, the main lip 3 and the sub lip 4 are both of an annular structure, the outer side of the sub lip 4 is fixed to the annular strip 104, and the inner side thereof is bent toward the front end portion 101, the outer side of the main lip 3 is fixed to the annular strip 104, and the inner side thereof is bent toward the rear end portion 103.
In the structure, the main lip 3 and the auxiliary lip 4 are both of bent strip-shaped structures, so that the main lip 3 and the auxiliary lip 4 have certain elasticity, and the contact area of the inner sides of the main lip 3 and the auxiliary lip 4 is large, so that the sealing effect is improved.
Further, the lip opening of the main lip 3 is provided with a slit type groove 6.
In the structure, the slit type groove 6 can increase the flexibility of the lip, improve the contact length of the lip and the shaft and improve the eccentric adaptation capability of the dynamic seal.
The main lip 3 and the sub lip 4 are generally provided with a shaft on the inner side, the peripheral side surface of the shaft abuts against the inner side surfaces of the main lip 3 and the sub lip 4, and the whole dynamic sealing device is arranged on the shaft when in use, wherein the main lip 3 and the sub lip 4 are directly contacted with the shaft, so that the sealing effect is achieved.
Further, the rear end portion 103 has an annular structure, and the oil guide plate 2 is fixedly connected to an inner side surface of the rear end portion 103.
In the structure, the oil guide plate 2 mainly has the function of preventing lubricating oil coming out of an oil way from directly impacting a lip and guiding the lubricating oil to enter the casing, so that the accumulation of the lubricating oil near the dynamic seal main lip 3 is reduced, and the dynamic seal work failure is avoided to a certain extent.
Further, the oil guide plate 2 is of an annular structure, the cross section of the oil guide plate is of an L shape, the upper end of the L-shaped structure is fixedly connected with the rear end part 103, the tail end of the L-shaped structure faces to the side far away from the main lip 3, and the oil guide plate 2 and the main lip 3 are arranged coaxially.
In the above-mentioned structure, lead oiled plate 2 and install in the 3 outsides of main lip, most lubricating oil can assault earlier and lead oiled plate 2, prevents that a large amount of gathering of lubricating oil is in 3 one sides of main lip, moreover because lead oiled plate 2 and design into "L" font structure, can remove along leading "L" shape structure of oiled plate 2 when keeping off lubricating oil impact and leading oiled plate 2, can not direct impact lead main lip 3 of oiled plate 2 downside, make main lip 3 can remain good sealed effect throughout.
It should be noted that, after the oil guide plate 2 is installed, the tail end of the oil guide plate exceeds the end surface 103 of the rear end part by 0.1-0.2mm, which is convenient for the installation and positioning of the dynamic seal.
Furthermore, the main lip 3 and the auxiliary lip 4 are made of polytetrafluoroethylene materials; the polytetrafluoroethylene material has good performance and can improve the sealing effect.
Furthermore, a dynamic seal mounting cover 5 is mounted on the outer side surface of the main body 1, and the dynamic seal mounting cover 5 is fixedly connected with the main body 1.
In the above structure, the mounting cover 5 serves to protect the main body 1 from direct contact with the outside of the main body 1.
In conclusion, the oil guide plate 2, the main lip 3 with the slit groove 6 and the front end part 101 with the thread structure are integrated on the main body 1, so that the oil sealing effect can be achieved by covering the sealing structure, and lubricating oil can be prevented from impacting the main lip 3 by the oil guide plate 2, so that carbonization is avoided; in addition, the external structure can be matched with the threads of the front end part 101, and then the whole dynamic seal can be driven to slide out along the shaft by pulling the external structure, so that the movable seal is convenient to disassemble.
It should be noted that, in the present invention, the oil guide plate 2 is integrated on the main body 1, and when the whole dynamic seal structure is disassembled, the oil guide plate 2 is also disassembled.
It should be noted that the flow direction of the lubricating oil is to pass through the oil guide plate 2 and then flow to the main lip 3 along the oil guide plate 2, so as to avoid direct impact.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A dynamic seal structure for a speed reducer is characterized in that: the dynamic seal comprises a main body (1), an oil guide plate (2), a main lip (3) and an auxiliary lip (4),
the main body (1) is of an annular structure;
the main lip (3), the auxiliary lip (4) and the oil guide plate (2) are all arranged on the main body (1);
the main lip (3) is positioned between the auxiliary lip (4) and the oil guide plate (2).
2. A dynamic seal structure for a speed reducer according to claim 1, wherein the main body (1) comprises a front end portion (101), a middle end portion (102) and a rear end portion (103), the middle end portion (102) being located between the front end portion (101) and the rear end portion (103).
3. A dynamic seal structure for a reduction gear according to claim 2, wherein the front end portion (101) has an annular structure and is provided with an internal thread (105) on an inner side surface thereof.
4. The dynamic seal structure for the speed reducer according to claim 3, wherein the middle end part (102) is of an annular structure, an annular strip (104) with a trapezoidal section is arranged on the inner side, the main lip (3) and the auxiliary lip (4) are both arranged on the inner side surface of the annular strip (104), the auxiliary lip (4) is arranged on one side close to the front end part (101), and the main lip (3) is arranged on one side close to the rear end part (103).
5. The dynamic seal structure for the speed reducer according to claim 4, wherein the annular strip (104) and the front end portion (101) form a left annular cavity (106) with a circular truncated cone section, the left annular cavity (106) is located on one side of the internal thread (105), and the annular strip (104) and the oil guide plate (2) form a right annular cavity (107) with a circular truncated cone section.
6. The dynamic seal structure for the speed reducer according to claim 4, wherein the main lip (3) and the auxiliary lip (4) are both of an annular structure, the outer side of the auxiliary lip (4) is fixedly connected to the annular strip (104), the inner side of the auxiliary lip is bent towards the front end portion (101), the outer side of the main lip (3) is fixedly connected to the annular strip (104), and the inner side of the auxiliary lip is bent towards the rear end portion (103).
7. The dynamic seal structure for the speed reducer according to claim 1, wherein the lip mouth of the main lip (3) is provided with a slit groove (6).
8. The dynamic seal structure for the speed reducer according to claim 2, wherein the rear end portion (103) is of an annular structure, and the oil guide plate (2) is fixedly connected to the inner side surface of the rear end portion (103).
9. The dynamic seal structure for the speed reducer according to claim 8, wherein the oil guide plate (2) is of an annular structure, the cross section of the oil guide plate is L-shaped, the upper end of the L-shaped structure is fixedly connected with the rear end part (103), the tail end of the L-shaped structure faces to the side far away from the main lip (3), and the oil guide plate (2) and the main lip (3) are coaxially arranged.
10. A dynamic seal structure for a speed reducer according to any one of claims 1 to 9, wherein the primary lip (3) and the secondary lip (4) are made of teflon.
11. The dynamic seal structure for the speed reducer according to claim 1, wherein a dynamic seal mounting cover (5) is mounted on the outer side surface of the main body (1), and the dynamic seal mounting cover (5) is fixedly connected with the main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111447783.4A CN114135674B (en) | 2021-11-30 | 2021-11-30 | Dynamic seal structure for speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111447783.4A CN114135674B (en) | 2021-11-30 | 2021-11-30 | Dynamic seal structure for speed reducer |
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| Publication Number | Publication Date |
|---|---|
| CN114135674A true CN114135674A (en) | 2022-03-04 |
| CN114135674B CN114135674B (en) | 2023-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111447783.4A Active CN114135674B (en) | 2021-11-30 | 2021-11-30 | Dynamic seal structure for speed reducer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725617Y (en) * | 2004-05-24 | 2005-09-14 | 北京北轴昆仑轧机轴承制造有限公司 | Mill bearing sealing ring having bilip |
| JP2009257549A (en) * | 2008-04-21 | 2009-11-05 | Nsk Ltd | Sealing member, pack seal provided with sealing member, and bearing device for wheel provided with pack seal |
| CN104653784A (en) * | 2015-01-26 | 2015-05-27 | 广州机械科学研究院有限公司 | High-speed oil sealing structure |
| CN105605227A (en) * | 2014-11-25 | 2016-05-25 | 东风汽车零部件(集团)有限公司 | Maintenance-free transmission shaft spline pair sealing oil seal |
| CN206274074U (en) * | 2016-12-23 | 2017-06-23 | 成都世纪阳光密封件有限公司 | Small eccentricity amount and shock proof oil sealing can be resisted |
-
2021
- 2021-11-30 CN CN202111447783.4A patent/CN114135674B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725617Y (en) * | 2004-05-24 | 2005-09-14 | 北京北轴昆仑轧机轴承制造有限公司 | Mill bearing sealing ring having bilip |
| JP2009257549A (en) * | 2008-04-21 | 2009-11-05 | Nsk Ltd | Sealing member, pack seal provided with sealing member, and bearing device for wheel provided with pack seal |
| CN105605227A (en) * | 2014-11-25 | 2016-05-25 | 东风汽车零部件(集团)有限公司 | Maintenance-free transmission shaft spline pair sealing oil seal |
| CN104653784A (en) * | 2015-01-26 | 2015-05-27 | 广州机械科学研究院有限公司 | High-speed oil sealing structure |
| CN206274074U (en) * | 2016-12-23 | 2017-06-23 | 成都世纪阳光密封件有限公司 | Small eccentricity amount and shock proof oil sealing can be resisted |
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| CN114135674B (en) | 2023-11-24 |
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