CN103062408A - Stepped sealing element and stepped coaxial sealing element - Google Patents
Stepped sealing element and stepped coaxial sealing element Download PDFInfo
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- CN103062408A CN103062408A CN2013100025790A CN201310002579A CN103062408A CN 103062408 A CN103062408 A CN 103062408A CN 2013100025790 A CN2013100025790 A CN 2013100025790A CN 201310002579 A CN201310002579 A CN 201310002579A CN 103062408 A CN103062408 A CN 103062408A
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- truncated cone
- groove
- stepped shaft
- sealing element
- stepped
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Abstract
The invention discloses a stepped sealing element and a stepped coaxial sealing element. The stepped sealing element comprises a sealing element body, an annular groove and a groove in the shape of a circular truncated cone; the annular groove is arranged in the axial center of the sealing element body, and the groove in the shape of the circular truncated cone is positioned below the annular groove and is intersected with the annular groove; the diameter of the bottom surface of the groove in the circular truncated cone is larger than that of the top of the groove in the shape of the circular truncated cone; a first fillet is arranged on an intersection surface of the annular groove and the groove in the shape of the circular truncated cone; and a second fillet is arranged on a combination surface of the bottom surface of the groove in the shape of the circular truncated cone and the inner side wall of the groove in the shape of the circular truncated cone. The stepped sealing element and the stepped coaxial sealing element are excellent in sealing performance owing to the unique structural design. Besides, as the first fillet and the second fillet are arranged on the stepped sealing element, the sealing element realizes a suction effect, in other words, an oil film can be effectively sucked back into an oil cavity when a piston rod contracts backwards, and leakage can be prevented under the suction effect.
Description
Technical field
The invention belongs to the technical field of sealing technology in the hydraulic system, particularly a kind of piston rod stepped shaft Sealing and stepped shaft co-axial seals.
Background technique
The stepped shaft co-axial seals is referred to as co-axial seals, can realize the one-way sealing of piston and piston rod, and China is in issue on October 17th, 1994 NBS, and formally implement October 1 nineteen ninety-five.But because the defective of each Seal Enterprise on the unreasonable and material property on the structural design causes this co-axial seals sealing effect very limited or fall flat all the time, therefore constantly improving and reforming always.
Sealing is to solve most important, the most effective means of hydraulic system leakage problem.If unallowed external leakage may appear in the hydraulic system poor sealing, the fluid that leaks outside will pollute the environment; Also may make air enter oil sucting cavity, affect the service behaviour of oil hydraulic pump and the stationarity (creeping) of hydraulic actuator motion; Leak when serious, system volume efficient is excessively low, even working pressure does not reach required value.If sealing is excessively, though but Leakage prevention can cause the sharp wear of hermetic unit, shorten the working life of Sealing, increase the kinetic friction resistance in the hydraulic element, and reduce the mechanical efficiency of system.Therefore, reasonably select and to design seal arrangement very important in the design of hydraulic system.At present, what domestic contrast was commonly used is O-ring seals and y-type seal ring, and material is generally all made with oil resistant rubber, because compact structure, the surface friction drag of movement parts is little, easy to manufacture, mounting or dismounting are convenient, and cost is low, and high low pressure all can be used, so in hydraulic system, be widely used, but because the imperfection of the aspects such as structural design and material property, the reliability of sealing effect or sealing is all the time not as people's will.
Summary of the invention
Technical problem to be solved by this invention is, overcomes above deficiency, provide a kind of have without creep, low friction, without rolling, utmost point low leakage, resistance to wear, long service life, stepped shaft Sealing and stepped shaft co-axial seals that reliability is strong.
In order to solve the problems of the technologies described above, technological scheme of the present invention is: a kind of stepped shaft Sealing, comprise seal body, and the ring groove of the axial centre of described seal body, also comprise the truncated cone shape groove that is positioned at described ring groove below and intersects with described ring groove; The bottom surface diameter of described truncated cone shape groove is greater than the upper base diameter of described truncated cone shape groove; Described ring groove is provided with the first chamfering with the phase cross surface of described truncated cone shape groove; The junction plane of the madial wall of the bottom surface of described truncated cone shape groove and described truncated cone shape groove is provided with the second chamfering.
Further, described stepped shaft Sealing, described the first chamfering is 45 ° of chamferings.
Further, described the second chamfering is round chamfering.
Further, the outer side wall of described seal body is cylinder type.
Further, described stepped shaft Sealing is mixed by teflon and copper powder, graphite, molybdenum disulfide, carbon fiber, glass.
The present invention also provides a kind of stepped shaft co-axial seals, comprises described stepped shaft Sealing, also comprises O-ring seals, and described O-ring seals is set on the outer side wall of described seal body.
Further, described stepped shaft Sealing is mixed by teflon and copper powder, graphite, molybdenum disulfide, carbon fiber, glass.
Further, described O-ring seals is made by nitrile rubber.
Further, described O-ring seals is made by the fluorine glue material.
Beneficial effect: the present invention compared with prior art, its remarkable advantage is: when 1, the present invention uses, because seal configuration has been carried out science, reasonably redesign and adjustment, its geometrical shape is autobalance along with pressure, therefore had very high sealability, also prolonged working life, strengthened the reliability that seals; 2, owing to particular design of the present invention, form changes thereupon during motion, and oil film was thin when piston rod was protracted, and oil film thickening during the piston rod retrude can reach zero leakage under resorption; 3, the setting of the first chamfering has made things convenient for when piston rod installed, and can also effectively protect Sealing, and after chamfering was set, because having increased the sealing angle between piston rod and the Sealing, sealing effect has obtained very large improvement; 4, the setting of the second chamfering has increased the angle that Sealing contacts with piston rod, can effectively prevent or when avoiding high pressure the Sealing bottom be extruded.
Description of drawings
Fig. 1 is the structural representation that the present invention uses state;
Fig. 2 is the sectional view of the present invention's one Sealing.
Shown in the figure: 1, stepped shaft Sealing; 2, O-ring seals; 3, piston rod; 4, guide sleeve; 11, annular groove; 12, truncated cone shape groove; 13, the first chamfering; 14, the second chamfering.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in detail:
As illustrated in fig. 1 and 2, a kind of stepped shaft co-axial seals of the present invention is called again GSJ axle stair ring, and it is installed between piston rod 3 and the guide sleeve 4, seals; Comprise stepped shaft Sealing 1 and O-ring seals 2, described stepped shaft Sealing 1 comprises seal body, and the ring groove 11 and the truncated cone shape groove 12 that is positioned at described ring groove 11 belows and intersects with described ring groove that are arranged on the axial centre of described seal body, wherein the bottom surface diameter of truncated cone shape groove 12 is greater than the upper base diameter of described truncated cone shape groove; Described ring groove 11 is provided with the first chamfering 13 with the phase cross surface of described truncated cone shape groove 12, the junction plane of the madial wall of the bottom surface of described truncated cone shape groove and described truncated cone shape groove is provided with the second chamfering 14, described the first chamfering 13 is 45 ° of chamferings, described the second chamfering 14 is round chamfering, the outer side wall of described seal body is cylinder type, and described O-ring seals 2 is set on the outer side wall of described seal body.
Described stepped shaft Sealing 1 mixes by high-abrasive materials such as teflon and copper powder, graphite, molybdenum disulfide, carbon fiber, glasses, overcome the easy creep of polytetrafluoroethylmaterial material, shortcoming easy to wear.
The material of O-ring seals 2 is nitrile butadiene rubber or fluorine glue material.
When the present invention uses, the stepped shaft co-axial seals is installed in the guide sleeve 4, when piston rod 3 to-and-fro motion, because seal configuration has been carried out science, reasonably redesign and adjustment, its geometrical shape is autobalance along with pressure, so had very high sealability; Wherein the stepped shaft Sealing is to be mixed by high-abrasive materials such as teflon and copper powder, graphite, molybdenum disulfide, carbon fiber, glasses, therefore increase the wear-resisting property of stepped shaft co-axial seals, thereby prolonged working life, strengthened the reliability of sealing; Because particular design of the present invention, form changes thereupon during motion, and oil film was thin when piston rod was protracted, and oil film thickening during the piston rod retrude can reach zero leakage under resorption; The setting of the first chamfering has made things convenient for when piston rod installed, and can also effectively protect Sealing, and after chamfering was set, because having increased the sealing angle between piston rod and the Sealing, sealing effect has obtained very large improvement; Simultaneously the setting of the second chamfering has increased the angle that Sealing contact with piston rod, can effectively prevent or be extruded bottom the Sealing when avoiding high pressure.
Claims (9)
1. a stepped shaft Sealing comprises seal body, and the ring groove that is arranged on the axial centre of described seal body, it is characterized in that: also comprise the truncated cone shape groove that is positioned at described ring groove below and intersects with described ring groove; The bottom surface diameter of described truncated cone shape groove is greater than the upper base diameter of described truncated cone shape groove; Described ring groove is provided with the first chamfering with the phase cross surface of described truncated cone shape groove; The junction plane of the madial wall of the bottom surface of described truncated cone shape groove and described truncated cone shape groove is provided with the second chamfering.
2. stepped shaft Sealing as claimed in claim 1 is characterized in that, described the first chamfering is 45 ° of chamferings.
3. stepped shaft Sealing as claimed in claim 1 is characterized in that, described the second chamfering is round chamfering.
4. stepped shaft Sealing as claimed in claim 1 is characterized in that, the outer side wall of described seal body is cylinder type.
5. stepped shaft Sealing as claimed in claim 1 is characterized in that, described stepped shaft Sealing is mixed by teflon and copper powder, graphite, molybdenum disulfide, carbon fiber, glass.
6. a stepped shaft co-axial seals is characterized in that, comprises stepped shaft Sealing as claimed in claim 1, also comprises O-ring seals, and described O-ring seals is set on the outer side wall of described seal body.
7. stepped shaft co-axial seals as claimed in claim 6 is characterized in that, described stepped shaft Sealing is mixed by teflon and copper powder, graphite, molybdenum disulfide, carbon fiber, glass.
8. stepped shaft co-axial seals as claimed in claim 6 is characterized in that, described O-ring seals is made by nitrile rubber.
9. stepped shaft co-axial seals as claimed in claim 6 is characterized in that, described O-ring seals is made by the fluorine glue material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100025790A CN103062408A (en) | 2013-01-05 | 2013-01-05 | Stepped sealing element and stepped coaxial sealing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100025790A CN103062408A (en) | 2013-01-05 | 2013-01-05 | Stepped sealing element and stepped coaxial sealing element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103062408A true CN103062408A (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100025790A Pending CN103062408A (en) | 2013-01-05 | 2013-01-05 | Stepped sealing element and stepped coaxial sealing element |
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| Country | Link |
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| CN (1) | CN103062408A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108162694A (en) * | 2018-01-04 | 2018-06-15 | 山东雷沃传动有限公司 | A kind of Tractor Driving Axle |
| CN109973417A (en) * | 2017-12-27 | 2019-07-05 | 宫振东 | A kind of novel bearing seal protector |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2325000A1 (en) * | 1973-05-17 | 1974-12-05 | Busak & Luyken Kg | Seal for hydraulic piston (rod) - has poly(tetrafluoroethylene) seal ring forming, with moving part, gap toward low-pressure side |
| US4449718A (en) * | 1982-07-10 | 1984-05-22 | Busak & Luyken | Packing for hydraulic pistons or piston rods |
| EP0431325B1 (en) * | 1989-12-02 | 1993-10-27 | Firma Carl Freudenberg | Piston or rod seal |
| CN1115018A (en) * | 1994-07-14 | 1996-01-17 | 郭世杰 | Combined sealing ring with no-opener sliding ring |
| EP1196704B1 (en) * | 1999-06-08 | 2004-12-29 | Trelleborg Sealing Solutions Denmark A/S | A sealing arrangement and a sealing member therefor |
| CN101408248A (en) * | 2008-07-02 | 2009-04-15 | 广州机械科学研究院 | Elastic compensating coaxial combined seal ring |
| CN203162153U (en) * | 2013-01-05 | 2013-08-28 | 太仓市明宇密封件有限公司 | Stair-shaped sealing piece and stair-shaped coaxial sealing piece |
-
2013
- 2013-01-05 CN CN2013100025790A patent/CN103062408A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2325000A1 (en) * | 1973-05-17 | 1974-12-05 | Busak & Luyken Kg | Seal for hydraulic piston (rod) - has poly(tetrafluoroethylene) seal ring forming, with moving part, gap toward low-pressure side |
| US4449718A (en) * | 1982-07-10 | 1984-05-22 | Busak & Luyken | Packing for hydraulic pistons or piston rods |
| EP0431325B1 (en) * | 1989-12-02 | 1993-10-27 | Firma Carl Freudenberg | Piston or rod seal |
| CN1115018A (en) * | 1994-07-14 | 1996-01-17 | 郭世杰 | Combined sealing ring with no-opener sliding ring |
| EP1196704B1 (en) * | 1999-06-08 | 2004-12-29 | Trelleborg Sealing Solutions Denmark A/S | A sealing arrangement and a sealing member therefor |
| CN101408248A (en) * | 2008-07-02 | 2009-04-15 | 广州机械科学研究院 | Elastic compensating coaxial combined seal ring |
| CN203162153U (en) * | 2013-01-05 | 2013-08-28 | 太仓市明宇密封件有限公司 | Stair-shaped sealing piece and stair-shaped coaxial sealing piece |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973417A (en) * | 2017-12-27 | 2019-07-05 | 宫振东 | A kind of novel bearing seal protector |
| CN108162694A (en) * | 2018-01-04 | 2018-06-15 | 山东雷沃传动有限公司 | A kind of Tractor Driving Axle |
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Application publication date: 20130424 |