CN105221745A - A kind of rotation combination seal ring - Google Patents
A kind of rotation combination seal ring Download PDFInfo
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- CN105221745A CN105221745A CN201510615976.4A CN201510615976A CN105221745A CN 105221745 A CN105221745 A CN 105221745A CN 201510615976 A CN201510615976 A CN 201510615976A CN 105221745 A CN105221745 A CN 105221745A
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- seal ring
- polyketone
- rotation combination
- combination seal
- modification
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Abstract
The present invention relates to a kind of rotation combination seal ring, the elastic element comprising a ring matrix and be located in this ring matrix, described ring body material is modification polyketone material, and described modification polyketone material comprises following component by weight percentage: polyketone 80% ~ 99.9%, processing aid 0.01 ~ 2%, solid lubricant 0 ~ 19.9%.Relative to traditional rotation combination seal ring material (teflon), the modification polyketone material that the present invention adopts has better wear resistance, creep resistance, hardness, anti-plasticating capacity, thus adds the life-span of seal ring; In addition, polyketone material does not absorb water good stability of the dimension, and molding mode variation (can adopt molding and forming, extruding and moulding etc.), molding cycle is short, and cost is low.
Description
Technical field
The present invention relates to a kind of seal ring, especially relate to a kind of rotation combination seal ring, belong to dynamic sealing technology field.
Background technique
Rotation combination seal ring is widely used in the place such as bar, axle, pin, swivel joint of rotation or oscillating motion, relates to multiple industrial fields such as engineering machinery, building machinery and automobile equipment.For rotary seal, the lubrication of Sealing all plays a decisive role for its sealability and life-span.In order to ensure the kinetic characteristic that rotary seal is good and certain working life, Sealing should be designed to work under sufficient lubrication condition.
Traditional rotating seal ring solves lubrication problem by offering oil storage tank at rotating face.Oil storage tank is generally the annular groove at working surface, and the mode easily through turnery processing obtains.But the rotating seal ring of the type operationally, oil must be relied on slowly to infiltrate to the gap of frictional interface, form lubricant film, and long time continuous working not easily forms effective oil film.Therefore, the material of rotating seal ring generally can only adopt the modified teflon material (what adopt in most situation is the ptfe composite of filling 40% copper powder) with self-lubricating property, but modified Teflon is easy to wear, material is partially soft, cannot bear high loading.If once running shaft generation eccentric phenomena, just likely cause seal ring to bear larger pressure, time serious, seal ring will be squeezed into trench gap, directly to causing decline or directly damage working life.In addition, due to modified Teflon material self character, also there is moulding process narrow limitation large (being generally compression molding), the shortcomings such as molding cycle is long.
Summary of the invention
Object of the present invention is exactly to solve the shortcomings such as traditional rotating seal ring lubricant film forms difficulty, the seal ring life-span is short, easy to wear, sealing effect is unstable problem and processing and forming technology narrow limitation is large, molding cycle is long, proposing a kind of modified polymer material rotation combination seal ring with new structure.
Object of the present invention can be achieved through the following technical solutions:
A kind of rotation combination seal ring, the elastic element comprising a ring matrix and be located in this ring matrix, described ring body material is modification polyketone material.
Described modification polyketone material comprises following component by weight percentage: polyketone 80% ~ 99.9%, processing aid 0.01 ~ 2%, solid lubricant 0 ~ 19.9%.
Described processing aid comprise in stabilizer and antioxidant one or both.
Described stabilizer and antioxidant all adopt conventional selection.
Described solid lubricant comprises molybdenum disulfide, graphite or teflon.
The working surface of described ring matrix is provided with reserve, and the Extreme breadth of reserve is greater than 1/2 of working surface axial width.
Described elastic element material is rubber or metal.
The sectional shape of described elastic element is meet all shapes with radial compensation power.
Sealing mechanism according to combined seal ring: the self-tightening sealing mechanism of elastomeric seal depends on the elasticity of elastomeric material and incompressibility and initial interference or precompressed existence.For Glais ring, as shown in Figure 4, Figure 5: in a free state, Glais ring is compressed Δ d when assembling from original depth d, and Δ d is the magnitude of interference needed for the groove being assembled to degree of depth T.Therefore, after assembling and before pressurization, sealing contact surface is formed and preloads stress σ
0.Be in operation, hydrodynamic pressure p=σ
xact on a side of Glais ring and impel the seal contact pressure of Glais ring to be increased to higher stress value σ
p.Because elastic material is almost incompressible, so σ
0, σ
p, there is following relation in p three: σ
p=σ
0+ p, this just means seal contact pressure σ
pthe amount σ of precompression stress is always exceeded than hydrodynamic pressure p
0, therefore can not leakage be formed.Although because traditional modified Teflon material self-lubricating property is good, easy to wear, Young's modulus is low, need reserve larger compensation rate, what it was formed preloads stress σ
0constantly can decline along with the wearing and tearing of itself, finally cause σ
p≤ p, leaks.And the advantage maximum compared with teflon of modification polyketone material is that it has better wear resistance, and Young's modulus is high, initial formed preload stress σ
0can keep stable in a long time not leak, i.e. σ
p> p, the working life of combined seal ring improves greatly.In addition, polyketone material also has excellent toughness, creep resistance, and heatproof reaches as high as more than 200 DEG C, has higher hardness, and anti-plasticating capacity is strong, and do not absorb water good stability of the dimension; Molding mode variation, can adopt molding and forming, extruding and moulding etc., molding cycle is short, low cost and other advantages.
In sum, relative to traditional rotation combination seal ring material (modified Teflon), the modification polyketone material that the present invention adopts has better wear resistance, creep resistance, hardness, anti-plasticating capacity, thus adds the life-span of seal ring; In addition, polyketone material does not absorb water good stability of the dimension, and molding mode variation (can adopt molding and forming, extruding and moulding etc.), molding cycle is short, and cost is low.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of rotation combination seal ring;
Fig. 2 is rotation combination seal ring side-looking structural representation;
Fig. 3 is rotation combination seal ring sectional structure schematic diagram;
Fig. 4 is initial linear interference Δ d and the contact stress σ of Glais ring
0;
Fig. 5 is the sealing contact stress σ of Glais ring under hydrodynamic pressure p
p.
Number in the figure: 1 is ring matrix, 2 is elastic element, and 3 is that 4 is reserve, and 5 is rubbing surface to rubbing body.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A kind of rotation combination seal ring, as shown in FIG. 1 to 3, the elastic element 2 comprising a ring matrix 1 and be located in this ring matrix 1, ring matrix 1 material is modification polyketone material.The working surface of ring matrix 1 is provided with reserve 4, and the Extreme breadth of reserve 4 is greater than 1/2 of working surface axial width, and reserve 4 is other is rubbing surface 5.Elastic element 2 material is rubber or metal.The sectional shape of elastic element 2 is meet all shapes with radial compensation power.During use, ring matrix 1 with to rub body 3 with the use of.
In the present embodiment, modification polyketone material comprises following component by weight percentage: polyketone 800g, stabilizer (2,6-di-tert-butyl-4-cresols) 1g, molybdenum disulfide 190g.
Ring matrix is formed by injection moulding once-through.
Concrete physical property, refers to table 1 (appending in table 1 and modified Teflon (filling 40% copper powder) performance comparison):
Table 1 polyketone physical property
Contrast known by the physical property of modification polyketone and modified Teflon in table 1, the anti-extrusion performance (hardness is higher, and the anti-extrusion performance of material is better) of modification polyketone, wear resistance, tensile strength, Young's modulus etc. have had larger lifting compared with modified Teflon.
Embodiment 2
Difference from Example 1 is, modification polyketone material comprises following component by weight percentage: polyketone 800g, stabilizer (β (3,5-di-tert-butyl-4 hydroxy phenyl) propionic acid octadecyl) 2g, molybdenum disulfide 180g.
Ring matrix forming method: first annular matrix is processed into materials in the tube by extruding and moulding, then becomes finished product by lathe secondary operations.
The concrete physical property of modification polyketone material that the present embodiment obtains refers to table 2:
Table 2 modification polyketone physical property
Embodiment 3
Difference from Example 1 is, modification polyketone material comprises following component by weight percentage: polyketone 999g, antioxidant (four [β-3,5-di-tert-butyl-4-hydroxy-phenylpropionic acid] pentaerythritol ester) 1g.
The concrete physical property of modification polyketone material that the present embodiment obtains refers to table 3:
Table 3 modification polyketone physical property
Embodiment 4
Difference from Example 1 is, modification polyketone material comprises following component by weight percentage: polyketone 880g, antioxidant (four [β-3,5-di-tert-butyl-4-hydroxy-phenylpropionic acid] pentaerythritol ester) 20g, solid lubricant (graphite) 100g.
The concrete physical property of modification polyketone material that the present embodiment obtains refers to table 4:
Table 4 modification polyketone physical property
By the physical properties results of the modification polyketone in above embodiment, can find out that the modification polyketone material that the present invention adopts has better wear resistance (characterizing by wear extent), toughness (characterizing by impact strength), creep resistance, hardness, anti-plasticating capacity, thus add the life-span of seal ring; In addition, polyketone material does not absorb water good stability of the dimension, and molding mode variation (can adopt molding and forming, extruding and moulding etc.), molding cycle is short, and cost is low.
Above-mentioned is can understand and use invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (7)
1. a rotation combination seal ring, the elastic element comprising a ring matrix and be located in this ring matrix, is characterized in that, described ring body material is modification polyketone material.
2. a kind of rotation combination seal ring according to claim 1, is characterized in that, described modification polyketone material comprises following component by weight percentage: polyketone 80% ~ 99.9%, processing aid 0.01 ~ 2%, solid lubricant 0 ~ 19.9%.
3. a kind of rotation combination seal ring according to claim 2, is characterized in that, described processing aid comprises one in stabilizer and antioxidant or combination.
4. a kind of rotation combination seal ring according to claim 2, is characterized in that, described solid lubricant comprises one or the combination of molybdenum disulfide, graphite or teflon.
5. a kind of rotation combination seal ring according to claim 1, is characterized in that, the working surface of described ring matrix is provided with reserve, and the Extreme breadth of reserve is more than or equal to 1/2 of working surface axial width.
6. a kind of rotation combination seal ring according to claim 1, is characterized in that, described elastic element material is rubber or metal spring.
7. a kind of rotation combination seal ring according to claim 1, is characterized in that, the sectional shape of described elastic element is meet all shapes with radial compensation power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615976.4A CN105221745B (en) | 2015-09-24 | 2015-09-24 | A kind of rotation combination sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615976.4A CN105221745B (en) | 2015-09-24 | 2015-09-24 | A kind of rotation combination sealing ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221745A true CN105221745A (en) | 2016-01-06 |
| CN105221745B CN105221745B (en) | 2018-06-29 |
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|---|---|---|---|
| CN201510615976.4A Active CN105221745B (en) | 2015-09-24 | 2015-09-24 | A kind of rotation combination sealing ring |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040012156A1 (en) * | 2002-07-11 | 2004-01-22 | Larry Cobb | Seal ring having secondary sealing lips |
| CN102257088A (en) * | 2008-11-07 | 2011-11-23 | 美国圣戈班性能塑料公司 | Large diameter thermoplastic seal |
| CN102777601A (en) * | 2011-05-09 | 2012-11-14 | 刘讯岐 | Grease lubrication combined sealing ring structure |
| CN203146824U (en) * | 2013-02-22 | 2013-08-21 | 苏州至顺表面科技有限公司 | Moving ring of sealing element |
| CN203214872U (en) * | 2012-12-27 | 2013-09-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Novel movable sealing device |
| CN203335834U (en) * | 2013-06-09 | 2013-12-11 | 广州机械科学研究院有限公司 | MD piston combination seal |
-
2015
- 2015-09-24 CN CN201510615976.4A patent/CN105221745B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040012156A1 (en) * | 2002-07-11 | 2004-01-22 | Larry Cobb | Seal ring having secondary sealing lips |
| CN102257088A (en) * | 2008-11-07 | 2011-11-23 | 美国圣戈班性能塑料公司 | Large diameter thermoplastic seal |
| CN102777601A (en) * | 2011-05-09 | 2012-11-14 | 刘讯岐 | Grease lubrication combined sealing ring structure |
| CN203214872U (en) * | 2012-12-27 | 2013-09-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Novel movable sealing device |
| CN203146824U (en) * | 2013-02-22 | 2013-08-21 | 苏州至顺表面科技有限公司 | Moving ring of sealing element |
| CN203335834U (en) * | 2013-06-09 | 2013-12-11 | 广州机械科学研究院有限公司 | MD piston combination seal |
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| Publication number | Publication date |
|---|---|
| CN105221745B (en) | 2018-06-29 |
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Address after: 200437 No. 99, Handan Road, Shanghai, Hongkou District Patentee after: Shanghai Material Research Institute Co.,Ltd. Address before: 200437 No. 99, Handan Road, Shanghai, Hongkou District Patentee before: SHANGHAI Research Institute OF MATERIALS |