CN201326673Y - Oil damper for locomotive and rolling stock - Google Patents
Oil damper for locomotive and rolling stock Download PDFInfo
- Publication number
- CN201326673Y CN201326673Y CNU2008201590171U CN200820159017U CN201326673Y CN 201326673 Y CN201326673 Y CN 201326673Y CN U2008201590171 U CNU2008201590171 U CN U2008201590171U CN 200820159017 U CN200820159017 U CN 200820159017U CN 201326673 Y CN201326673 Y CN 201326673Y
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- seal
- oil
- seal lip
- sealing
- lip
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Abstract
An oil damper for locomotive and rolling stock comprises a guide, a guide tape, a high-pressure sealing ring, a low-temperature sealing ring, a wiper, a piston rod, an oil seal gland, a gland, a pad, an oil storage tank seal ring, an oil storage tank and an oil cylinder. A high-temperature sealing element is arranged at the seal position of the piston rod and the oil cylinder, the sealing between the inside of the oil cylinder and the piston rod utilizes a high-pressure sealing structure, a slant hole which is disposed inside the guide is communicated with the oil storage tank, a low-temperature sealing element producing double sealing is arranged at the sealing position of the oil storage tank and the piston rod, and the wiper is disposed outside the low-temperature sealing element.
Description
Technical field
The utility model relates to a kind of locomotive vehicle oil hydraulic damper modular construction, relates to a kind of improvement of locomotive vehicle oil hydraulic damper sealing configuration specifically, is mainly used in one of rolling stock and is or two be in the locomotive vehicle oil hydraulic damper of vibration insulating system.
Background technique
Locomotive vehicle oil hydraulic damper be installed between vehicle body and the bogie or bogie and wheel between, with pillow spring, rubber pad, constitute vibration insulating system, play the effect that relaxes locomotive vibration.Be to guarantee locomotive and vehicle operating safety and take advantage of the comfortable vitals of seat.According to the maintenance statistics of company's oil-pressure damper, after the main reason that oil-pressure damper in use lost efficacy is sealing part abrasion, cisco unity malfunction leakage of oil appears and.Along with China's train running speed improves constantly, the Seal of Oil Dampers part lost efficacy and the problem of leakage of oil is more outstanding.The sealing position of oil-pressure damper is generally two places, rod seal and oil storage cylinder sealing.Oil storage cylinder is sealed into static seal, in use leakage of oil can not occur.Rod seal is a reciprocating movement sealing, and constantly wearing and tearing appear in Sealing in the using process, and when surpassing certain wear extent, and the sealing system just leakage of oil can occur can not compensate wearing and tearing the time.The sealing configuration of oil-pressure damper piston rod is domestic existing multiple, and the technological scheme the most similar to the utility model patent has two kinds:
First kind of technological scheme (saxophone's sealing configuration) be as shown in Figure 1: 1 be guidance, 2 for the oil storage cylinder seal ring, 3 for pressing plate, 4 for gland, 5 for piston rod, 6 for rod seal circle, 7 is oil storage cylinder, 8 is oil cylinder.Guidance 1 play the guiding role with the Spielpassung that piston rod 5 forms 0.05-0.08, and the oil cylinder inner high voltage oil by this gap leaks is discharged to oil storage cylinder by the inclined hole on the guidance 9 again.Make rod seal circle front end place pressure, keep the state close with oil storage cylinder pressure.Gland 4 needs simultaneously oil storage cylinder seal ring 2 and rod seal circle 6 to be compressed sealing..
Second kind of technological scheme (Buddhist nun's Ke sealing configuration) be as shown in Figure 2: 10 be the waveform dirt-proof boot, 11 for dust ring, 12 for oil sealing cover, 13 play the high pressure sealing effect seal ring, 14 for guidance tape, 15 for pad, 16 for gland, 17 for oil storage cylinder, 18 for oil cylinder, 19 for guidance, 20 for piston rod, 21 is outside framework oil seal, play the low pressure seal effect.
By long-term maintenance of the oil-pressure damper of above-mentioned two kinds of sealing configurations learnt, the oil-pressure damper of first kind of technological scheme, because long-term to-and-fro motion increases matching gap between piston rod and the guidance, owing to there is not high-pressure seal ring, high pressure oil in the oil cylinder leaks and increases, and has both reduced the stretching damping force, has increased the sealing load of rod seal circle again, make the rod seal circle occur leakage of oil prematurely, the stretching damping capacity descends again.The oil-pressure damper of this sealing configuration, owing to have only the secondary seal lip of outside framework oil seal dustproof, the minority vibration damper also damages seal lip owing to foreign matter enters, and occurs leakage of oil too early.The oil-pressure damper of this structure is when producing assembling, owing to gland 4 will guarantee rod seal circle 6 and oil storage cylinder Sealing 2 are compressed sealing simultaneously, so processing and sealing difficulty are also bigger.
The oil-pressure damper of second kind of technological scheme has overcome some shortcomings of above-mentioned first kind of technological scheme, has increased the seal ring 13, guidance tape 14, dust ring 11 and the waveform dirt-proof boot 10 that play the high pressure sealing effect simultaneously.Increase than first kind of technological scheme the working life of sealing structure.But the inefficacy of oil-pressure damper, the overwhelming majority still causes owing to the leakage of oil of low pressure seal spare.
This low pressure seal spare is the outside framework oil seal structure, and there is tension spring in the primary seal lip outside, and the spring diameter of prior art scheme is all less, and tensioned power is less, and after the wearing and tearing of primary seal lip, the amount of tensioned compensation is limited.Another side is a dust sealing, does not have tensioned, only plays dustproof effect.Therefore this outside framework oil seal directly influences the working life of oil-pressure damper.Necessary structure to this outside framework oil seal is improved, and improves working life, thereby improves the time between failures of whole oil-pressure damper.
The model utility content
Main purpose of the present utility model is the deficiency at existing locomotive vehicle oil hydraulic damper, propose a kind of locomotive vehicle oil hydraulic damper sealing configuration that can further increase the service life long, make the obvious novel locomotive vehicle oil-pressure damper that improves Mean time to failure of oil-pressure damper.
The technical solution of the utility model is: a kind of used for rolling stock Seal of Oil Dampers device comprises guidance, guidance tape, high-pressure seal ring, low pressure seal circle, dust ring, piston rod, oil sealing cover, gland, backing plate, oil storage cylinder seal ring, oil storage cylinder and oil cylinder; Be provided with high-pressure sealing ring at piston rod and cylinder seal place, adopt high pressure seal structure with rod seal in the oil cylinder, and inclined hole is set in guidance communicates with oil storage cylinder; Be provided with the low pressure seal spare that can play double seal at piston rod and oil storage cylinder sealing part, and also be provided with dust ring in low pressure seal spare outside.
The main characteristics of sealing structure has:
The first, be provided with high-pressure sealing ring at piston rod and cylinder seal place.Oil-pressure damper can use the high-pressure sealing ring sealing at the high pressure of instantaneous generation 8-12MPa when work.High-pressure sealing ring is that lattice come coil structures.Ring material was a polytetrafluoroethylene in lattice enclosed, and had the characteristics of self-lubricating abrasion-resistant, and under high oil pressure, can obtain the pressure compensation of oil pressure to outer shroud O shape circle, the high pressure sealing of remaining valid.
The second, be provided with the low pressure seal spare that can play double seal at piston rod and oil storage cylinder sealing part.The problem that occurs leakage of oil at existing second kind of technological scheme mesolow seal ring easily, in the utility model patent, tension spring with the primary seal lip of low pressure seal spare, wherein the footpath increases to 2.5mm by original 1.8mm, steel wire diameter increases to 0.7mm by 0.5mm, and the tension force of spring is enhanced about more than once, even seal lip occurs than galling, spring is compensated wearing and tearing under big tension force effect, and sealing continues to remain valid.Increase tension spring in secondary seal lip, make secondary seal lip after wearing and tearing, also can obtain the compensation of tension spring, make secondary seal lip have better seal and dustproof effect with making.
The 3rd, because the above-mentioned improvement in the low pressure seal circle, dust sealing effect and working life significantly improve, and also have dust ring in low pressure seal spare outside, the waveform dirt-proof boot in the cancellation prior art scheme.Like this, both reduce the processing cost of oil-pressure damper, when same installation dimension, can increase effective working stroke of oil-pressure damper again, increased the using scope of oil-pressure damper.
Description of drawings
Fig. 1 is existing a kind of structural representation of locomotive vehicle oil hydraulic damper;
Fig. 2 is the another kind of structural representation of existing locomotive vehicle oil hydraulic damper;
Fig. 3 is the utility model structural representation;
Fig. 4 is the utility model low pressure seal coil structures schematic representation.
Among the figure: skeleton secondary seal lip, 38 primary seal lip tension spring, 37 primary seal lip, 36 inclined hole, 35 oil cylinder, 34 oil storage cylinder, 33 oil storage cylinder seal ring, 32 backing plate, 31 gland, 30 oil sealing cover, 29 piston rod, 28 dust ring, 27 low pressure seal spare, 26 high-pressure sealing ring, 25 guidance tape, 24 22) guidance, 23)))))))))))))))) secondary seal lip tension spring, 39).
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
From accompanying drawing 3 as can be seen the utility model be a kind of used for rolling stock Seal of Oil Dampers device, comprise guidance 22, guidance tape 23, high-pressure sealing ring 24, low pressure seal spare 25, dust ring 26, piston rod 27, oil sealing cover 28, gland 29, backing plate 30, oil storage cylinder seal ring 31, oil storage cylinder 32 and oil cylinder 33; Be provided with high-pressure sealing ring 24 in piston rod 27 and oil cylinder 33 sealing part, adopt high pressure seal structures with piston rod 27 sealings in the oil cylinder 33, and inclined hole 34 is set in guidance 22 communicates with oil storage cylinder 32; Also be provided with the low pressure seal spare 25 that can play double seal in piston rod 27 and oil storage cylinder 32 sealing part, and also have dust ring 26 in low pressure seal spare 25 outsides.
Wherein, cylinder diameter is Ф 70, and diameter of piston rod is Ф 28, and by under the situation of standard charge of oil, when vibration damper was compressed to minimum installation dimension, oil storage cylinder pressure was about 0.04MPa; When vibration damper is stretched to maximum installation dimension, oil storage cylinder pressure is-0.03MPa about.Oil-pressure damper is when loading operation, and the theoretical stroke of actual vibration stroke ratio vibration damper is much smaller, so the alternate between-0.02MPa and 0.02MPa of the pressure in the general oil storage cylinder.The utility model patent adopts the low pressure seal spare 25 of double seal, and as shown in Figure 4, low pressure seal spare 25 comprises a primary seal lip 35 and a secondary seal lip 37; Described primary seal lip 35 is the double-lipped sealing configuration; Described secondary seal lip 37 is single lip seal configuration; Be connected as a single entity by rubber between primary seal lip 35 and a secondary seal lip 37, and form a groove interstice coverage; Outside primary seal lip 35 and secondary seal lip 37, be respectively equipped with primary seal lip tension spring 36 and secondary seal lip tension spring 38; Be provided with skeleton 39 on the cylindrical of joint between primary seal lip 35 and the secondary seal lip 37, skeleton 39 is a rubber-metal assembly, and its metalwork is an annular metal sheet, is embedded within the rubber body.The low pressure seal spare of skeleton 39 and primary seal lip 35 and " fourth " font of secondary seal lip 37 formation.Skeleton 39 is installed in guidance 22 by in the circular slotted eye of piston rod 27, and compresses skeleton 39 by oil sealing cover 28.The compensation rate of low pressure seal spare 25 primary seal lips 35 and 37 pairs of wearing and tearing of secondary seal lip is all bigger, can keep permanently effective use fully to lower oil storage cylinder pressure.
After long-term the use, high-pressure sealing ring 24 is because wearing and tearing, even produce little seepage, but the inclined hole 34 of the oil of seepage by guidance is discharged to oil storage cylinder, and the pressure of low pressure seal circle front end still equates with pressure in the oil storage cylinder.During the oil-pressure damper compression, the oil of oil storage cylinder has the pressure of 0.02MPa, even little seepage occurs through the long-term low pressure seal spare primary seal lip that uses, the oil of little seepage is stored between primary seal lip and the secondary seal lip.At most form malleation much smaller than oil storage cylinder because secondary seal lip is originally negative pressure, and the micro oil of little seepage can not form malleation between primary seal lip and secondary seal lip this moment.When vibration damper is stretching, the oil of oil storage cylinder has-negative pressure of 0.02MPa, the oil that is stored between primary seal lip and the secondary seal lip can flow back into oil storage cylinder again, forms negative pressure again between primary seal lip and secondary seal lip.Oil-pressure damper uses this state, because secondary seal lip has the tensioned sealing, still can use significant period of time oil-proof.So, the sealing configuration of the utility model patent, the sealing working life that can improve oil-pressure damper more significantly.
The hermetically-sealed construction of the utility model patent has following advantages:
After the hermetically-sealed construction of oil-pressure damper prior art scheme improved, make low pressure seal spare the primary seal lip and Secondary seal lip can both obtain permanently effective sealing, solved the problem that leakage of oil appears in low pressure seal spare too early, more significantly Improved the service life of oil-pressure damper. Simplify simultaneously the hermetically-sealed construction of oil-pressure damper, reduced production cost.
Press the oil-pressure damper of the hermetically-sealed construction making of the utility model patent, be installed in the SS6B electric locomotive and carry out with car Test in the overhaul in August in this year, checked sealing ring and the dust ring of this structure for 4 years, sealing property is still good Good, continue at present entrucking and use, estimate to re-use at least 2 years.
Claims (7)
1, a kind of locomotive vehicle oil hydraulic damper comprises guidance, guidance tape, high-pressure seal ring, low pressure seal circle, dust ring, piston rod, oil sealing cover, gland, backing plate, oil storage cylinder seal ring, oil storage cylinder and oil cylinder; It is characterized in that: be provided with high-pressure sealing ring at piston rod and cylinder seal place, adopt high pressure seal structure with rod seal in the oil cylinder, and inclined hole is set in guidance communicates with oil storage cylinder; Be provided with the low pressure seal spare that can play double seal in piston rod and storage cylinder sealing part, and also be provided with dust ring in low pressure seal spare outside.
2, locomotive vehicle oil hydraulic damper as claimed in claim 1 is characterized in that: described low pressure seal spare comprises a primary seal lip and a secondary seal lip.
3, locomotive vehicle oil hydraulic damper as claimed in claim 2 is characterized in that: described primary seal lip is the double-lipped sealing configuration.
4, locomotive vehicle oil hydraulic damper as claimed in claim 2 is characterized in that: described secondary seal lip is single lip seal configuration.
5, locomotive vehicle oil hydraulic damper as claimed in claim 2 is characterized in that: described primary seal lip and secondary seal lip are respectively equipped with primary seal lip tension spring and secondary seal lip tension spring outward.
6, as claim 2 or 3 or 4 described locomotive vehicle oil hydraulic dampers, it is characterized in that: be connected as a single entity by rubber between described primary seal lip and a secondary seal lip, and form a groove interstice coverage; On the cylindrical of joint between primary seal lip and the secondary seal lip, be provided with the annular metal skeleton.
7, locomotive vehicle oil hydraulic damper as claimed in claim 5, it is characterized in that: described skeleton is a rubber-metal assembly, its metalwork is an annular metal sheet, be embedded within the rubber body low pressure seal spare of skeleton and primary seal lip and " fourth " font of a secondary seal lip formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201590171U CN201326673Y (en) | 2008-11-03 | 2008-11-03 | Oil damper for locomotive and rolling stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201590171U CN201326673Y (en) | 2008-11-03 | 2008-11-03 | Oil damper for locomotive and rolling stock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201326673Y true CN201326673Y (en) | 2009-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201590171U Expired - Lifetime CN201326673Y (en) | 2008-11-03 | 2008-11-03 | Oil damper for locomotive and rolling stock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201326673Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235456A (en) * | 2010-04-26 | 2011-11-09 | Bwi股份有限公司 | Double-seal rod guidance assembly with low-friction disc |
| CN103307187A (en) * | 2013-06-27 | 2013-09-18 | 富奥汽车零部件股份有限公司 | Vibration damper sealing structure |
| CN107489724A (en) * | 2017-10-12 | 2017-12-19 | 华东交通大学 | A kind of shock absorber sealing device of the guide holder containing wedge insert |
| CN110991096A (en) * | 2018-09-28 | 2020-04-10 | 株洲中车时代电气股份有限公司 | Simulation analysis method for oil seal of oil pressure shock absorber framework |
-
2008
- 2008-11-03 CN CNU2008201590171U patent/CN201326673Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235456A (en) * | 2010-04-26 | 2011-11-09 | Bwi股份有限公司 | Double-seal rod guidance assembly with low-friction disc |
| CN102235456B (en) * | 2010-04-26 | 2013-11-06 | 京西重工股份有限公司 | Double-seal rod guidance assembly with low-friction disc |
| CN103307187A (en) * | 2013-06-27 | 2013-09-18 | 富奥汽车零部件股份有限公司 | Vibration damper sealing structure |
| CN103307187B (en) * | 2013-06-27 | 2015-05-13 | 富奥汽车零部件股份有限公司 | Vibration damper sealing structure |
| CN107489724A (en) * | 2017-10-12 | 2017-12-19 | 华东交通大学 | A kind of shock absorber sealing device of the guide holder containing wedge insert |
| CN110991096A (en) * | 2018-09-28 | 2020-04-10 | 株洲中车时代电气股份有限公司 | Simulation analysis method for oil seal of oil pressure shock absorber framework |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091014 |
|
| CX01 | Expiry of patent term |