CN103742651A - Low-friction reciprocating motion seal component - Google Patents

Low-friction reciprocating motion seal component Download PDF

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Publication number
CN103742651A
CN103742651A CN201410042652.1A CN201410042652A CN103742651A CN 103742651 A CN103742651 A CN 103742651A CN 201410042652 A CN201410042652 A CN 201410042652A CN 103742651 A CN103742651 A CN 103742651A
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China
Prior art keywords
seal
sealing
low friction
reciprocating movement
fomale
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CN201410042652.1A
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CN103742651B (en
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杜杰
王景林
李玉胜
梁延忠
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YanTai Runfuxiang Oil Seal Co Ltd
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YanTai Runfuxiang Oil Seal Co Ltd
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Priority to CN201410042652.1A priority Critical patent/CN103742651B/en
Priority to PCT/CN2014/075952 priority patent/WO2014183542A1/en
Publication of CN103742651A publication Critical patent/CN103742651A/en
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Publication of CN103742651B publication Critical patent/CN103742651B/en
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Abstract

The invention relates to the technical field of seal components and particularly discloses a low-friction reciprocating motion seal component. The low-friction reciprocating motion seal component comprises an annular support frame and an annular elastic seal body, wherein the annular elastic seal body comprises at least one seal lip. The low-friction reciprocating motion seal component is characterized in that a concave-convex girdle is arranged on an annular seal surface on which the seal lip is formed, and a plurality of projections or pits are arranged on the concave-convex girdle; the seal lip comprises a first seal lip and a second seal lip, and a first concave-convex girdle and a second concave-convex girdle are respectively arranged on annular seal surfaces which are formed by the first seal lip and the second seal lip; the projections or the pits are in a shape of a semi-sphere, a box, a truncated cone or a polygonal frustum. The low-friction reciprocating motion seal component has the beneficial effects that friction between the seal body and a shaft is reduced under the condition of ensuring that the seal body has sufficient radial seal pressure, so that the motion friction of a reciprocating mechanism is reduced; the service lives of the seal body and the motion shaft are prolonged under the condition of ensuring seal.

Description

A kind of low friction reciprocating movement sealing part
Technical field
The present invention relates to a kind of Sealing, relate in particular to a kind of low friction reciprocating movement sealing part.
Background technique
Reciprocating hydraulic structure is parts conventional in modern vehicle, engineering machinery, and reciprocating shaft seal lip structure and wear resistance are most important on the impact in working life of reciprocating hydraulic structure.And the sealability of Sealing depends on the thickness of sealing surface oil film, between sealing lip and axle, oil slick thickness is excessive, and Sealing easily leaks; Thickness is too small, and dry friction may occur, and causes Sealing and axle wearing and tearing.As the vibration damper of automobile in use, often can, because Sealing frictional force is large, cause reciprocating hydraulic structure to occur the problems such as leakage of oil, abnormal sound, poor durability.But Sealing will be realized the sealing to reciprocating hydraulic structure inner sealing medium, pressurized gas simultaneously, must possess axle is kept to enough radial forces again.Therefore when seal designs, first to meet the desired radial force of sealing, according to frictional force, equal the long-pending theory of radial force and friction factor, when radial force design load is larger, under the condition remaining unchanged in friction coefficient, will inevitably produce large axial friction, under the larger state of axial friction, between Sealing and reciprocating hydraulic structure, easily generation dry grinding, abnormal sound even cause reciprocating hydraulic structure to lose efficacy, and affect the working life of the moving bodies such as automobile, engineering machinery.Therefore, how to solve and both guaranteed suitable radial seal power, the axial friction that can as far as possible reduce again between seal and reciprocating hydraulic structure just becomes a contradiction.The patent No. is 201320268503, name is called a kind of patent of invention of low friction damper, by axial parallel line being set on the sealing surface of Sealing to reduce the area of contact between sealing surface and damper shaft, thereby reduce frictional force between the two, it compares plain shaft Sealing very large improvement, but also have the following disadvantages: the one, simple axial parallel line structure is under different applying working conditions, particularly sealed medium is in the upper end of Sealing, under primary seal lip applying working condition upward, likely cause the oiling agent of axial parallel line inside to be heated and produce bad sealing drainage, the 2nd, owing to forming axial oil storage groove between axial parallel line, although be conducive to form critical lubricant film between sealing surface and damper shaft, but these axial grooves also can impel lubricant oil to run off along with axially reciprocating, thereby cause early dry grinding of Sealing, inefficacy.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of low friction reciprocating movement sealing part is provided.It can, when guaranteeing radial seal pressure, reduce the axial friction between seal and reciprocating hydraulic structure, thereby extends the working life of seal.
The technological scheme that the present invention solves the problems of the technologies described above is as follows: a kind of low friction reciprocating movement sealing part, comprise annular brace skeleton and cyclic spring seal, described cyclic spring seal comprises at least one sealing lip, it is characterized in that, on the annular sealing surface forming at described sealing lip, be provided with male and fomale(M&F) endless belt, described male and fomale(M&F) endless belt is provided with multiple projections or pit.
The invention has the beneficial effects as follows: the one, owing to being provided with male and fomale(M&F) endless belt on the annular sealing surface forming at described sealing lip, not only reduced the area of contact between sealing surface and reciprocating hydraulic structure, and be conducive to form critical lubricant film between sealing surface and reciprocating hydraulic structure; The 2nd, between the projection of male and fomale(M&F) endless belt or pit, can store preferably lubricant oil, reduced the friction factor between sealing lip and reciprocating hydraulic structure, keeping, under the prerequisite that Sealing is constant to reciprocating hydraulic structure radial force, having reached the object that reduces frictional force between Sealing and reciprocating hydraulic structure; The 3rd, owing to having formed vertical-horizontal slot by projection or pit on male and fomale(M&F) endless belt, lubricant oil is stored in these grooves and can obtain labyrinth sealing effect, be also conducive to the long-term preservation of lubricant film, thus the working life of having improved Sealing; The 4th, single projection or bowl configurations, in to-and-fro motion, have more pliability and servo-actuated property.The present invention and conventional seals part compare axial friction can reduce 10%-37%; Compared with the Sealing of simple employing axial parallel line, axial friction can also reduce 5%-25%, extends seal durability at 5%-17%.
Hydraulic structure described here can be oil hydraulic cylinder and piston structure, and sealing member sheathing of the present invention is on reciprocating piston or axle.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described sealing lip comprises the first sealing lip and the second sealing lip, on the annular sealing surface forming, is respectively equipped with the first male and fomale(M&F) endless belt and the second male and fomale(M&F) endless belt at described the first sealing lip and the second sealing lip.
Adopt the beneficial effect of above-mentioned further scheme to be, can multiple tracks male and fomale(M&F) endless belt be set according to the seal of different structure, to reach better sealing effect.
Further, described cyclic spring seal also comprises dust excluder lips, on the annular sealing surface forming, is also provided with the 3rd male and fomale(M&F) endless belt in described dust excluder lips.
Adopt the beneficial effect of above-mentioned further scheme to be, based on above-mentioned same reason, the 3rd male and fomale(M&F) endless belt is set can reduce Sealing axial friction when effectively deadening dust.
Further, described projection is shaped as hemisphere, the cubic bodily form, frustoconic shape or many terrace with edges shape.
Further, described pit is shaped as hemisphere, the cubic bodily form, frustoconic shape or many terrace with edges shape.
Adopt the beneficial effect of above-mentioned further scheme to be, adopt projection or the pit of different structure can better adapt to different operating modes to reduce axial friction under the prerequisite guaranteeing sealability: by the spacing between shape, density and projection or the pit of adjustment concave, convex structure, can adjust the sealability of Sealing or adapt to the pressure to different sealed mediums.
Further, described projection or pit are uniformly distributed or random distribution on described annular sealing surface.
Adopt the beneficial effect of above-mentioned further scheme to be, be uniformly distributed or random distribution can select adopt, more can there is mazy type oil storage groove in random distribution, thereby make the longer service life of Sealing.
Further, the material of described cyclic spring seal is polyurethane or rubber.
Further, described rubber is nitrile butadiene rubber, hydrogenated nitrile-butadiene rubber or fluorine rubber.
Adopt the beneficial effect of above-mentioned further scheme to be, according to purposes, require cost difference, can select suitable sealing material.
Further, the height of described projection or the degree of depth of pit are 0.02--0.3 millimeter.
Adopt the beneficial effect of above-mentioned further scheme to be, can be according to the thickness of the diameter of Sealing, Sealing, require oil slick thickness and other working condition requirement to select the degree of depth of height or the pit of described projection.
Further, the described sealing surface between described adjacent protrusion or adjacent pit is plane, lower concave arc shape or protrusion arc.
Adopt the beneficial effect of above-mentioned further scheme to be, described sealing surface between described adjacent protrusion or adjacent pit is lower concave arc shape or protrusion arc, be conducive to form the concavo-convex aspect of different levels, make it to form critical lubricant film between the better projection at sealing surface and reciprocating hydraulic structure, thereby improved the life-span of Sealing.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention 1 structural representations;
Fig. 2 is embodiments of the invention 2 structural representations;
Fig. 3 is embodiments of the invention 3 structural representations;
Fig. 4 is embodiments of the invention 3 structural representations;
Fig. 5 is male and fomale(M&F) endless belt of the present invention part sectioned view (spheroidal projection) radially;
Fig. 6 is male and fomale(M&F) endless belt in Fig. 1 part sectioned view (many terrace with edges shape projection) radially;
Fig. 7 is male and fomale(M&F) endless belt in Fig. 2 part sectioned view (projection of random distribution) radially
Fig. 8 is male and fomale(M&F) endless belt in Fig. 3 part sectioned view (forming endless belt by pit) radially;
Fig. 9 is that the A-A of Fig. 4 is to sectional drawing (cubic bodily form projection).
In Fig. 1~Fig. 9,1, annular brace skeleton; 2, cyclic spring seal; 3, dust excluder lips; 4, the 3rd male and fomale(M&F) endless belt; 5, the second male and fomale(M&F) endless belt; 6, the first male and fomale(M&F) endless belt; 7, the second sealing lip; 8, the first sealing lip; 9, lock ring spring; 10, projection; 11, pit.
Embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
If Fig. 1 is to as shown in Fig. 5, a kind of low friction reciprocating movement sealing part, comprise annular brace skeleton 1 and cyclic spring seal 2, described cyclic spring seal 2 comprises at least one sealing lip, on the annular sealing surface forming at described sealing lip, be provided with male and fomale(M&F) endless belt, described male and fomale(M&F) endless belt is provided with multiple protruding 10 or pit 11
Described cyclic spring seal 2 is also provided with lock ring spring 9.
Described sealing lip comprises the first sealing lip 8 and the second sealing lip 7, on the annular sealing surface forming, is respectively equipped with the first male and fomale(M&F) endless belt 6 and the second male and fomale(M&F) endless belt 5 at described the first sealing lip 8 and the second sealing lip 7.
Described cyclic spring seal 2 also comprises dust excluder lips 3, is also provided with the 3rd male and fomale(M&F) endless belt 4 in described dust excluder lips 3 on the annular sealing surface forming.
Described protruding 10 be shaped as hemisphere, the cubic bodily form, frustoconic shape or many terrace with edges shape.
Described pit 11 be shaped as hemisphere, the cubic bodily form, frustoconic shape or many terrace with edges shape.
Described protruding 10 or pit 11 on described annular sealing surface, be uniformly distributed or random distribution.
The material of described cyclic spring seal 2 is polyurethane or rubber.
Described rubber is nitrile butadiene rubber, hydrogenated nitrile-butadiene rubber or fluorine rubber.
The degree of depth of described protruding 10 height or pit is 0.02-0.3 millimeter.
Described sealing surface between described adjacent protrusion 10 or adjacent pit 11 is plane, lower concave arc shape or protrusion arc.
Below list respectively more several specific embodiments, further structure of the present invention is described:
Embodiment 1
As shown in Fig. 1 and Fig. 6, a kind of low friction reciprocating movement sealing part, comprise annular brace skeleton 1 and cyclic spring seal 22, described cyclic spring seal 2 comprises at least one sealing lip, on the annular sealing surface forming at described sealing lip, be provided with male and fomale(M&F) endless belt, described male and fomale(M&F) endless belt is provided with multiple protruding 10.
Described protruding 10 be shaped as many terrace with edges shape.
Described protruding 10 height is 0.02 millimeter.
All the other structures are described above, do not repeating.
Embodiment 2
As shown in Figure 2 and Figure 7, a kind of low friction reciprocating movement sealing part, comprise annular brace skeleton 1 and cyclic spring seal 2, described cyclic spring seal 2 comprises at least one sealing lip, on the annular sealing surface forming at described sealing lip, be provided with male and fomale(M&F) endless belt, described male and fomale(M&F) endless belt is provided with multiple protruding 10.
Described protruding 10 random distributions on described annular sealing surface.
Described protruding 10 height is 0.10 millimeter.
All the other structures are described above, do not repeating.
Embodiment 3
As shown in Fig. 3 and Fig. 8, a kind of low friction reciprocating movement sealing part, comprise annular brace skeleton 1 and cyclic spring seal 2, described cyclic spring seal 2 comprises at least one sealing lip, on the annular sealing surface forming at described sealing lip, be provided with male and fomale(M&F) endless belt, described male and fomale(M&F) endless belt is provided with multiple pits 11.
Described pit 11 be shaped as many terrace with edges shape.
The degree of depth of described pit is 0.3 millimeter.
All the other structures are described above, do not repeating.
Embodiment 4
As shown in Fig. 4 and Fig. 9, a kind of low friction reciprocating movement sealing part, comprise annular brace skeleton 1 and cyclic spring seal 2, described cyclic spring seal 2 comprises at least one sealing lip, on the annular sealing surface forming at described sealing lip, be provided with male and fomale(M&F) endless belt, described male and fomale(M&F) endless belt is provided with multiple protruding 10.
Described protruding 10 be shaped as the cubic bodily form.While adopting cubic bodily form projection, on described annular sealing surface, can form latticed lubricant oil storage channel.
Described protruding 10 height is 0.20 millimeter.
All the other structures are described above, do not repeating.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (10)

1. one kind low friction reciprocating movement sealing part, comprise annular brace skeleton and cyclic spring seal, described cyclic spring seal comprises at least one sealing lip, it is characterized in that, on the annular sealing surface forming at described sealing lip, be provided with male and fomale(M&F) endless belt, described male and fomale(M&F) endless belt is provided with multiple projections or pit.
2. low friction reciprocating movement sealing part according to claim 1, it is characterized in that, described sealing lip comprises the first sealing lip and the second sealing lip, on the annular sealing surface forming, is respectively equipped with the first male and fomale(M&F) endless belt and the second male and fomale(M&F) endless belt at described the first sealing lip and the second sealing lip.
3. low friction reciprocating movement sealing part according to claim 1 and 2, is characterized in that, described cyclic spring seal also comprises dust excluder lips, on the annular sealing surface forming, is also provided with the 3rd male and fomale(M&F) endless belt in described dust excluder lips.
4. low friction reciprocating movement sealing part according to claim 1 and 2, is characterized in that, described projection be shaped as hemisphere, the cubic bodily form, frustoconic shape or many terrace with edges shape.
5. low friction reciprocating movement sealing part according to claim 1 and 2, is characterized in that, described pit be shaped as hemisphere, the cubic bodily form, frustoconic shape or many terrace with edges shape.
6. low friction reciprocating movement sealing part according to claim 1 and 2, is characterized in that, described projection or pit are uniformly distributed or random distribution on described annular sealing surface.
7. low friction reciprocating movement sealing part according to claim 1 and 2, is characterized in that, the material of described cyclic spring seal is polyurethane or rubber.
8. low friction reciprocating movement sealing part according to claim 7, is characterized in that, described rubber is nitrile butadiene rubber, hydrogenated nitrile-butadiene rubber or fluorine rubber.
9. low friction reciprocating movement sealing part according to claim 1 and 2, is characterized in that, the height of described projection or the degree of depth of pit are 0.02--0.3 millimeter.
10. low friction reciprocating movement sealing part according to claim 1 and 2, is characterized in that, the described sealing surface between described adjacent protrusion or adjacent pit is plane, lower concave arc shape or protrusion arc.
CN201410042652.1A 2013-05-16 2014-01-29 A kind of low friction reciprocating movement sealing part Active CN103742651B (en)

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CN201410042652.1A CN103742651B (en) 2014-01-29 2014-01-29 A kind of low friction reciprocating movement sealing part
PCT/CN2014/075952 WO2014183542A1 (en) 2013-05-16 2014-04-22 Reciprocating motion seal component

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358599A (en) * 2014-11-18 2015-02-18 烟台润蚨祥油封有限公司 Low-friction air valve oil seal
CN107664221A (en) * 2016-07-29 2018-02-06 斯凯孚公司 Sealing lip for low friction combination piston seal
CN108869554A (en) * 2018-08-31 2018-11-23 无锡三立轴承股份有限公司 Bearing seal
CN110805738A (en) * 2019-10-25 2020-02-18 托伦斯精密机械(上海)有限公司 Sealing structure of vacuum plugboard switch valve
CN112204278A (en) * 2018-07-09 2021-01-08 Nok株式会社 Sealing device
CN112771284A (en) * 2018-08-29 2021-05-07 日立安斯泰莫株式会社 Buffer device

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JP2003056718A (en) * 2001-08-22 2003-02-26 Koyo Seiko Co Ltd Oil seal
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CN1688832A (en) * 2002-10-15 2005-10-26 Nok株式会社 Reciprocating seal
JP2012072822A (en) * 2010-09-28 2012-04-12 Nok Corp Sealing device
CN103244686A (en) * 2013-05-16 2013-08-14 烟台润蚨祥油封有限公司 Low-friction oil seal for shock absorber
JP3185997U (en) * 2013-07-02 2013-09-12 Nok株式会社 Sealing device

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CN1035711A (en) * 1987-12-11 1989-09-20 布隆福斯造船公司 Be used for the shaft sealing of seal fluid medium
JP2003056718A (en) * 2001-08-22 2003-02-26 Koyo Seiko Co Ltd Oil seal
CN1688832A (en) * 2002-10-15 2005-10-26 Nok株式会社 Reciprocating seal
CN2599328Y (en) * 2003-03-05 2004-01-14 青岛基珀密封工业有限公司 Oil seal
JP2012072822A (en) * 2010-09-28 2012-04-12 Nok Corp Sealing device
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JP3185997U (en) * 2013-07-02 2013-09-12 Nok株式会社 Sealing device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358599A (en) * 2014-11-18 2015-02-18 烟台润蚨祥油封有限公司 Low-friction air valve oil seal
CN107664221A (en) * 2016-07-29 2018-02-06 斯凯孚公司 Sealing lip for low friction combination piston seal
CN112204278A (en) * 2018-07-09 2021-01-08 Nok株式会社 Sealing device
CN112204278B (en) * 2018-07-09 2023-02-17 Nok株式会社 Sealing device
US11781653B2 (en) 2018-07-09 2023-10-10 Nok Corporation Sealing device
CN112771284A (en) * 2018-08-29 2021-05-07 日立安斯泰莫株式会社 Buffer device
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CN108869554A (en) * 2018-08-31 2018-11-23 无锡三立轴承股份有限公司 Bearing seal
CN110805738A (en) * 2019-10-25 2020-02-18 托伦斯精密机械(上海)有限公司 Sealing structure of vacuum plugboard switch valve
CN110805738B (en) * 2019-10-25 2024-06-11 托伦斯半导体设备启东有限公司 Sealing structure of vacuum plugboard switch valve

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Denomination of invention: A low friction reciprocating movement seal

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Pledgee: China Construction Bank Corporation Laiyang Sub branch

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