CN102767588B - Oil damper for rolling stock - Google Patents
Oil damper for rolling stock Download PDFInfo
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- CN102767588B CN102767588B CN201210266207.4A CN201210266207A CN102767588B CN 102767588 B CN102767588 B CN 102767588B CN 201210266207 A CN201210266207 A CN 201210266207A CN 102767588 B CN102767588 B CN 102767588B
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Abstract
The invention relates to an oil damper for rolling stock, belonging to dampers. The oil damper comprises a hydraulic cylinder, a piston, a piston rod, an oil cylinder housing, a cylinder bottom valve and a protective cover; the piston is in radial clearance fit in the hydraulic cylinder; the piston and the lower end of the piston rod are in tight fit fixation; a guide sleeve is in coaxial clearance fit on the piston rod, and has the necking columnar bottom in tight fit with the upper opening of the hydraulic cylinder, and the outer periphery of the upper columnar body in tight fit with the upper opening of the coaxially fitted oil cylinder housing; the protective cover is fitted on the oil cylinder housing and the guide sleeve; an upper load link rod is in coaxial connection with the upper end of the piston rod via the base of the upper load link rod; the upper load link rod has a first load connection rubber pad fitted on the upper load link rod, and is fixed by a gland; the lower opening of the hydraulic cylinder is in tight fit with a valve, which is in tight fit with the tray of a lower load link rod at the outer end of the valve; the periphery of the tray is in tight fit with the lower opening of the oil cylinder housing; and the lower load link rod has a second load connection rubber pad fitted on the lower load link rod, and is fastened by a support cap. The inventive oil damper for rolling stock has the characteristics of no oil leakage, stable performance, good insusceptibility to ambient temperature change, high sandstorm resistance and long product service life, and can realize steady and safe running of vehicles, and improve vehicle comfortableness and service life.
Description
Technical field
The invention belongs to vibration damper, particularly relate to a kind of locomotive vehicle oil hydraulic damper.
Background technique
Along with the raising of train running speed, various vertical, horizontal, the snakelike effect produced between wheel track will cause the vibration making Vehicular system violent, oil-pressure damper is as the effective dissipative damping device of one, railway vehicle uses widely, the working life of the operating steadily of vehicle, safe operation, raising travelling comfort and vehicle is played an important role.But oil-pressure damper domestic at present has the serious problems such as leakage of oil, unstable properties, be difficult to meet service condition, present China train is mainly with the vibration damper that Europe and Japan produce.But due to Europe and day local domain little, environmental change is little, train operation mileage is short, its vibration damper can meet the service condition in its geographic range, but Chinese Railway working line is long, region is wide, environmental change is large, Europe vibration damper product has significant limitation, be mainly manifested in: symmetry properties and the life-span of vibration damper resistance to variation of ambient temperature ability, anti-blown sand ability, product performance are low, China head can not be met use apart from the train of high frequency time, cause vibration damper product to detect once every half a year, every two years change once.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, provides a kind of locomotive vehicle oil hydraulic damper.
Locomotive vehicle oil hydraulic damper of the present invention is made up of oil hydraulic cylinder, piston, piston rod, oil cylinder thimble, cylinder bottom valve body and guard shield cylinder, and described piston radial Spielpassung is in oil hydraulic cylinder, and the lower end of piston and piston rod is axially tightly fixed; Cylindricality guide sleeve concentric Spielpassung is on piston rod and by filling packing two way sealed, the phase drive fit suitable for reading of the extension diameter section on the phase drive fit suitable for reading of the undergauge section of guiding at the bottom of sleeve column and oil hydraulic cylinder, its cylinder and the oil cylinder thimble of coaxial package, guard shield jacket casing is loaded on oil cylinder thimble and guide sleeve, upper load connecting rod is connected with the upper end same axis of piston rod by its base, and the ring of this base week and the phase drive fit suitable for reading of guard shield cylinder, upper load connecting rod is set with load and connects glue pier I and fixed by glue pier gland.The end opening of oil hydraulic cylinder and the upper end phase drive fit of cylinder bottom valve body, the lower end of cylinder bottom valve body and the internal orifice phase drive fit of the pallet of lower load connecting rod, the periphery of pallet and the end opening phase drive fit of oil cylinder thimble, lower load connecting rod has been set with load and has connected glue pier II and fastening by holder cap.The plate body of piston is circumferentially provided with and determines damping flow conduit and at least three mutative damp throttle valve, wherein: the passage aperture that described at least three mutative damp throttle valve oppositely arranged, were in the mutative damp throttle valve of both direction is each other mutually different; Filling packing in guide sleeve inner chamber is multistage lip type two way sealed packing and by packing gland tight; The plate body of cylinder bottom valve body is provided with more than one one-way valve, determines damping flow conduit I, two kinds of passages are like this by the bottom of oil hydraulic cylinder and accumulator conducting, wherein: described more than one one-way valve be mutually oppositely arrange, the passage aperture of the one-way valve be in both direction is mutually different, wherein: determining damping flow conduit I is mutually docked by the large port of two different Venturi tubes of small end aperture to form.
As a further improvement on the present invention, the radial direction of guide sleeve is provided with oil guiding hole, and the annular space of piston rod and the accumulator conducting of oil cylinder thimble are passed through in the top of oil hydraulic cylinder by this oil guiding hole.
As a further improvement on the present invention, the top of guide sleeve and the upper end of piston rod have been set with dust-proof cover.
Locomotive vehicle oil hydraulic damper of the present invention, novel structure, oil-proof, stable performance, affects little by variation of ambient temperature, anti-blown sand ability is strong, life of product is long, can make the operating steadily of vehicle, the travelling comfort of safety, raising vehicle and working life.This locomotive vehicle oil hydraulic damper, not only may be used on train, also may be used for other heavy vehicles.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is piston structure schematic diagram;
Fig. 3 is that Fig. 2 A-A is to structural representation;
Fig. 4 is that Fig. 2 B-B is to structural representation;
Fig. 5 is valve body structure schematic diagram;
Fig. 6 is that Fig. 5 A-A is to structural representation;
Fig. 7 is that Fig. 5 C-C is to structural representation;
Fig. 8 is the structural representation of guide sleeve.
Embodiment
Locomotive vehicle oil hydraulic damper of the present invention, by oil hydraulic cylinder 1, piston 2, piston rod 3, oil cylinder thimble 4, cylinder bottom valve body 12 and guard shield cylinder 5 are formed, described piston 2 radial clearance is matched with in oil hydraulic cylinder 1, piston 2 is axially tightly fixed with the lower end of piston rod 3, cylindricality guide sleeve 6 concentric Spielpassung is on piston rod 3 and by filling packing 7 two way sealed, the phase drive fit suitable for reading of the undergauge section at the bottom of guide sleeve 6 post and oil hydraulic cylinder 1, the phase drive fit suitable for reading of the extension diameter section on its cylinder and the oil cylinder thimble 4 of coaxial package, guard shield cylinder 5 is set on oil cylinder thimble 4 and guide sleeve 6, upper load connecting rod 8 is connected with the upper end same axis of piston rod 3 by its base 9, and the ring of this base 9 week and the phase drive fit suitable for reading of guard shield cylinder 5, upper load connecting rod 8 is set with load and connects glue pier I 10, and fixed by glue pier gland 11, the end opening of oil hydraulic cylinder 1 and the upper end phase drive fit of cylinder bottom valve body 12, the lower end of cylinder bottom valve body 12 and the internal orifice phase drive fit of the pallet 14 of lower load connecting rod 13, the periphery of pallet 14 and the end opening phase drive fit of oil cylinder thimble 4, lower load connecting rod 13 has been set with load and has connected glue pier II 15 and fastening by holder cap 16, as shown in Figure 1.
As shown in Figure 2; the plate body of piston 2 is circumferentially provided with and determines damping flow conduit 17 and at least three mutative damp throttle valve 18; wherein: the passage aperture that described at least three mutative damp throttle valve 18 oppositely arranged, were in the mutative damp throttle valve 18 of both direction is each other mutually different; as shown in Figure 3, Figure 4; the bidirectional throttle hole size of mutative damp throttle valve is different; to guarantee that the displacement of piston in Tension and Compression movement process is identical, the flow of the oil in upper and lower two chambeies of vibration damper is different.The effect determining damping flow conduit is, before and after Venturi tube, pressure reduction and flow are directly proportional, when pressure reduction reach certain after flow constant, the flow of unnecessary oil passes through from mutative damp throttle valve, the cavitation of fluid can be reduced like this, improve the working life of vibration damper fluid.
Circumferentially arrange to be provided with in the plate face of piston 2 and determine damping flow conduit 17 and at least three mutative damp throttle valve 18, as shown in Figure 2.Piston both sides are provided with the orifice valve of different flow, ensure that flow is different when compressing and stretch, because upper oil cavitie has piston rod, account for certain area, and pressure during tension and compression suffered by piston both sides is different.
The plate body of cylinder bottom valve body 12 is provided with more than one one-way valve 19, determines damping flow conduit I 20, two kinds of passages are like this by the bottom of oil hydraulic cylinder 1 and accumulator 22 conducting, wherein: described more than one one-way valve 19 be mutually oppositely arrange, the passage aperture of the one-way valve 19 be in both direction is mutually different, wherein: determining damping flow conduit I 20 is mutually docked by the large port of two different Venturi tubes of small end aperture to form.
As shown in Fig. 5, Fig. 6, Fig. 7.When lower oil cavitie volume enlargement or reduce, also should carry out damping according to different flows, realize the coordination of damping force.
Be provided with oil guiding hole 21 in the radial direction of guide sleeve 6, the annular space of piston rod 3 and accumulator 22 conducting of oil cylinder thimble 4 are passed through in the top of oil hydraulic cylinder 1 by this oil guiding hole 21, as shown in Figure 8.Filling packing 7 in guide sleeve 6 inner chamber is multistage bidirectional lip seal packing and by gland 23 tight.Sealing on guide sleeve, because piston rod always moves up and down, sealing is easy to lose efficacy, and rational sealing configuration, wear-resisting material ensure that vibration damper does not leak outside.Guide sleeve sealing material adopts fluorine rubber material, improves abrasion resistant effect, improves working life.Dust-proof cover 24 has been set with in the upper end of the top of guide sleeve 6 and piston rod 3.Guide sleeve and piston rod have certain gap, object be piston rod compression or extensional motion time, ensure accumulator and being communicated with between upper oil cavitie.Because the pressure in upper oil cavitie is higher, so necessary good seal of the Sealing of guide sleeve, long service life, sealing adopts two-way lip seal structure, near upper oil cavitie sealing lip inside sealed high pressure oil, the sealing lip near dust-proof flaring is outside, prevents sand and dust from entering piston rod, piston rod is scratched, causes and leak outside.
The working principle of this vibration damper is:
This vibration damper connects glue pier I 10 by load and is connected with vehicle fixing frame with the pad 25 on it, oil is full of in oil hydraulic cylinder 1 and accumulator 22, when producing up-down vibration in train driving process, upper load connecting rod 8 drives piston rod 3 to move thereupon, thus drives piston 2 to move in oil cylinder, piston has fixed, mutative damp hole, oil in upper and lower oil cylinder by damping hole, thus absorbs kinetic energy, plays the object of vibration damping, oil temperature in oil cylinder raises, and is distributed in air go by oil cylinder outer wall.
When stretching travel, piston 2 moves upward, (Fig. 1 shows to left movement), upper oil cavitie 26 is compressed, volume reduces, part oil flows to lower oil cavitie 27 by the quantitative damping hole on piston 2 and variable damping hole, another part oil is by the gap between piston rod 3 and guide sleeve 6, accumulator 22 is entered by the spill port of guide sleeve, fluid in accumulator 22 increases, enter into lower oil cylinder 27 by the damping hole of valve body 12 and unloading valve, thus complete the motion of fluid in whole vibration damper, kinetic energy is converted to heat energy.
When compression movement, piston 2 moves downward, (Fig. 1 show move right), lower oil cavitie 27 is compressed, volume reduces, part oil flows to upper oil cavitie 26 by the quantitative damping hole on piston 2 and variable damping hole, the oily damping hole by valve body 12 of another part and unloading valve enter into accumulator 22, fluid in oil storage cylinder increases, by the gap between piston rod 3 and guide sleeve 6, enter upper oil cavitie by the spill port of guide sleeve, thus complete the motion of fluid in whole vibration damper, kinetic energy is converted to heat energy.
Claims (3)
1. locomotive vehicle oil hydraulic damper, be made up of oil hydraulic cylinder (1), piston (2), piston rod (3), oil cylinder thimble (4), cylinder bottom valve body (12) and guard shield cylinder (5), it is characterized in that piston (2) radial clearance is matched with in oil hydraulic cylinder (1), piston (2) is axially tightly fixed with the lower end of piston rod (3), cylindricality guide sleeve (6) concentric Spielpassung is upper and by filling packing (7) two way sealed in piston rod (3), the phase drive fit suitable for reading of the undergauge section at the bottom of guide sleeve (6) post and oil hydraulic cylinder (1), the phase drive fit suitable for reading of the extension diameter section on its cylinder and the oil cylinder thimble (4) of coaxial package, guard shield cylinder (5) is set on oil cylinder thimble (4) and guide sleeve (6), upper load connecting rod (8) is connected by the upper end same axis of its base (9) with piston rod (3), and the ring of this base (9) week and the phase drive fit suitable for reading of guard shield cylinder (5), upper load connecting rod (8) upper suit load connects glue pier I (10), and fixed by glue pier gland (11), the end opening of oil hydraulic cylinder (1) and the upper end phase drive fit of cylinder bottom valve body (12), the lower end of cylinder bottom valve body (12) and the internal orifice phase drive fit of the pallet (14) of lower load connecting rod (13), the periphery of pallet (14) and the end opening phase drive fit of oil cylinder thimble (4), lower load connecting rod (13) has been set with load and has connected glue pier II (15) and fastening by holder cap (16), the plate body of piston (2) is circumferentially provided with and determines damping flow conduit (17) and at least three mutative damp throttle valve (18), wherein: the passage aperture that described at least three mutative damp throttle valve (18) oppositely arranged, were in the mutative damp throttle valve (18) of both direction is each other mutually different, filling packing (7) in guide sleeve (6) inner chamber is for multistage lip type two way sealed packing and by packing gland (23) tightly, the plate body of cylinder bottom valve body (12) is provided with more than one one-way valve (19), determines damping flow conduit I (20), two kinds of passages are like this by the bottom of oil hydraulic cylinder (1) and accumulator (22) conducting, wherein: described more than one one-way valve (19) be mutually oppositely arrange, the passage aperture of the one-way valve (19) be in both direction is mutually different, wherein: determining damping flow conduit I (20) is mutually docked by the large port of two different Venturi tubes of small end aperture to form.
2. locomotive vehicle oil hydraulic damper as claimed in claim 1, it is characterized in that the radial direction of guide sleeve (6) is provided with oil guiding hole (21), the annular space of piston rod (3) and accumulator (22) conducting of oil cylinder thimble (4) are passed through in the top of oil hydraulic cylinder (1) by this oil guiding hole (21).
3. locomotive vehicle oil hydraulic damper as claimed in claim 1, is characterized in that the top of guide sleeve (6) and the upper end of piston rod (3) have been set with dust-proof cover (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210266207.4A CN102767588B (en) | 2012-07-30 | 2012-07-30 | Oil damper for rolling stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210266207.4A CN102767588B (en) | 2012-07-30 | 2012-07-30 | Oil damper for rolling stock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102767588A CN102767588A (en) | 2012-11-07 |
| CN102767588B true CN102767588B (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210266207.4A Active CN102767588B (en) | 2012-07-30 | 2012-07-30 | Oil damper for rolling stock |
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| CN (1) | CN102767588B (en) |
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| CN103032506A (en) * | 2012-12-28 | 2013-04-10 | 宁波凯瑞汽车零部件有限公司 | Double throttling damper for rebuilt valve of automobile |
| CN103307183B (en) * | 2013-06-25 | 2015-04-29 | 苏州唐氏机械制造有限公司 | Working method of buffer suitable for attracting sliding block in impact process |
| CN104712699A (en) * | 2013-06-25 | 2015-06-17 | 苏州唐氏机械制造有限公司 | Buffer |
| CN103671676A (en) * | 2013-12-24 | 2014-03-26 | 北京九州一轨隔振技术有限公司 | Viscous damper |
| CN106934089A (en) * | 2015-12-31 | 2017-07-07 | 沪东重机有限公司 | A kind of damped coefficient check method of fluid pressure type longitudinal vibration damper |
| CN105822169A (en) * | 2016-04-26 | 2016-08-03 | 伍志勇 | Damper protection device for furniture hinge |
| CN106481721A (en) * | 2016-12-08 | 2017-03-08 | 山东凌博瑞轨道交通科技有限公司 | Shock absorber piston assembly and hydraulic damper |
| CN109667876B (en) * | 2017-10-16 | 2020-03-27 | 株洲中车时代电气股份有限公司 | Oil pressure shock absorber piston and oil pressure shock absorber |
| CN108167369A (en) * | 2017-12-30 | 2018-06-15 | 珠海市业成轨道交通设备科技有限公司 | A kind of high speed motor car oil-pressure damper pressure cylinder open-celled structure |
| CN111255843A (en) * | 2020-01-15 | 2020-06-09 | 广东博智林机器人有限公司 | Gas-liquid composite suspension cylinder, hydraulic system and transport vehicle |
| CN111520430B (en) * | 2020-02-25 | 2024-05-14 | 中国北方车辆研究所 | Candle type hydro-pneumatic suspension |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1034438A (en) * | 1988-01-21 | 1989-08-02 | 中国人民解放军国防科学技术大学 | The method for designing of flow-controllable vapor-etched venturi |
| CN2385156Y (en) * | 1998-09-18 | 2000-06-28 | 重庆钢铁(集团)有限责任公司 | Bidirectional sealing ring |
| CN2347842Y (en) * | 1998-11-10 | 1999-11-10 | 李馨 | Oil pressure vibration damper |
| CN2495849Y (en) * | 2001-09-17 | 2002-06-19 | 上海天通铁路车辆配件有限公司 | Sealing structure for oildraulic shock-absorber |
| CN2503264Y (en) * | 2001-10-18 | 2002-07-31 | 海门市铁路机车车辆配件厂 | Oleo-gear |
| CA2409812A1 (en) * | 2001-10-29 | 2003-04-29 | Bombardier Inc. | Shock absorber with adjustable valving |
| CN2923780Y (en) * | 2006-05-23 | 2007-07-18 | 青岛瑞拓橡塑制品有限公司 | Washing machine dewatering shaft rotation-stop water seal |
| CN200975487Y (en) * | 2006-12-08 | 2007-11-14 | 倪静丰 | Sealed ring for oil cylinder |
| CN100548766C (en) * | 2006-12-30 | 2009-10-14 | 胡荷地 | Hydraulic damping device for train |
| CN202690857U (en) * | 2012-07-30 | 2013-01-23 | 郑亚青 | Oil pressure vibration absorber for rolling stock |
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2012
- 2012-07-30 CN CN201210266207.4A patent/CN102767588B/en active Active
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| CN102767588A (en) | 2012-11-07 |
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