CN110219924A - A kind of high-speed rail contact line damper - Google Patents

A kind of high-speed rail contact line damper Download PDF

Info

Publication number
CN110219924A
CN110219924A CN201910588288.1A CN201910588288A CN110219924A CN 110219924 A CN110219924 A CN 110219924A CN 201910588288 A CN201910588288 A CN 201910588288A CN 110219924 A CN110219924 A CN 110219924A
Authority
CN
China
Prior art keywords
cylinder barrel
piston
piston rod
contact line
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910588288.1A
Other languages
Chinese (zh)
Inventor
钱雪松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Campus of Hohai University
Original Assignee
Changzhou Campus of Hohai University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changzhou Campus of Hohai University filed Critical Changzhou Campus of Hohai University
Priority to CN201910588288.1A priority Critical patent/CN110219924A/en
Publication of CN110219924A publication Critical patent/CN110219924A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
    • B60M1/234—Arrangements for supporting or suspending trolley wires, e.g. from buildings incorporating yielding means or damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3228—Constructional features of connections between pistons and piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/346—Throttling passages in the form of slots arranged in cylinder walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/362—Combination of sealing and guide arrangements for piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/369—Sealings for elements other than pistons or piston rods, e.g. valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2224/00—Materials; Material properties
    • F16F2224/02—Materials; Material properties solids
    • F16F2224/0208—Alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2224/00—Materials; Material properties
    • F16F2224/02—Materials; Material properties solids
    • F16F2224/0241—Fibre-reinforced plastics [FRP]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/02—Surface features, e.g. notches or protuberances

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention discloses a kind of high-speed rail contact line dampers, including right end (1), cylinder barrel (2), piston rod (3), piston (4), intermediate end (5), left end (6), a kind of high-speed rail contact line damper that the application proposes, it can greatly reduce and reduce the vibration of contact line, on the one hand improve contact line and pantograph lead between contact reliability, power down accident occurs when preventing high-speed rail from running, on the other hand, the service life of contact line and pantograph conductive slider is also improved, guarantees the reliable power supply of high-speed rail.For the present invention by the moulding process of the structure design and piston rod and piston of innovation, so that a kind of high-speed rail contact line shock absorber structure is simple, reliable performance is easy for installation, greatly reduces the production cost of contact line damper, is with a wide range of applications.

Description

A kind of high-speed rail contact line damper
Technical field
The present invention relates to a kind of hydraulic damper, and in particular to arrives a kind of high-speed rail contact line damper, belongs to electrically and machine Electro-technical field.
Background technique
With the fast development of China's high-speed rail, to high-speed rail reliability of operation, higher requirements are also raised, it is known that High-speed rail receives the electric power of power grid, driving high-speed rail operation by contact line and pantograph.Contact line has certain in actual installation Sag, high-speed rail run when, pantograph can to contact line formation lift, cause pantograph two sides contact line generate vibration, this On the one hand kind vibration can reduce the reliability contacted between contact line and pantograph, increase the risk of high-speed rail power down, on the other hand, This vibration can also reduce the service life of contact line and pantograph conductive slider.
Summary of the invention
In order to overcome above-mentioned deficiency, the present invention provides a kind of high-speed rail contact line dampers.
Technical scheme is as follows:
A kind of high-speed rail contact line damper, including right end, cylinder barrel, piston rod, piston, intermediate end, left end；
Spiral grooves are machined on the right part inner wall of the cylinder barrel, the left and right edges formed between spiral grooves and inner wall of cylinder are Convex structure；
The middle part of the piston rod has the serrate grooves of mutual dislocation down through punch forming, and right end is threaded, and uses In the connection with external structure；
The piston has the position of serrate grooves by injection molding in the middle part of piston rod, and the material of piston is enhancing nylon Piston, the piston and piston rod are shaped to the one being reliably connected；
It is provided with sealing element in the intermediate end periphery and inner hole, intermediate end is fit into the specific bit in the middle part of cylinder barrel It sets, by withholding the outer wall of cylinder barrel, inner wall of cylinder part inlay enters in the seal channel of intermediate end periphery, cylinder barrel and centre It is formed and is reliably connected between end, meanwhile, reliable sealing is formed between inner wall of cylinder and intermediate end periphery；
The piston rod is inserted into cylinder barrel from right to left together together with piston, is formed and is slidably matched between piston and inner wall of cylinder, The left part of piston rod runs through the inner hole of intermediate end, and reliable sealing is formed between the left part of piston rod and the inner hole of intermediate end；
Sealing element and dust guard are provided in the inner hole of the right end, the periphery of right end is provided with sealing element, the right end Headgear is mounted in the right part of piston rod, and is inserted into the right end of cylinder barrel, and being formed between the right part of piston rod and the inner hole of right end can By sealing and dust-proof, the reliable sealing of formation between the periphery of right end and the right end inner hole of cylinder barrel, by withholding the outer wall of cylinder barrel, Inner wall of cylinder is embedded into the seal channel of right end periphery, is formed and is reliably connected between cylinder barrel and right end；
The first working chamber A, the right side of the piston and right end are formed between the left side of the piston and the right side of intermediate end Left side between formed in the second working chamber B, the first working chamber A and the second working chamber B and be filled with working fluid；
The left part of the left end is connection plunger, and the periphery of right part offers groove, a left side for the right part insertion cylinder barrel of left end It holds in inner hole, by withholding the outer wall of cylinder barrel, inner wall of cylinder part inlay enters in the groove of left end periphery, cylinder barrel and left end It is formed and is reliably connected between head；
Piston rod left part accommodating chamber C is formed between the right side of the left end and the left side of intermediate end.
The material of above-mentioned intermediate end and right end is copper or enhancing nylon.
A kind of high-speed rail contact line damper that the application proposes, can greatly reduce and reduce the vibration of contact line, a side Face improves contact line and pantograph lead between contact reliability, power down accident occurs when preventing high-speed rail from running, on the other hand, The service life of contact line and pantograph conductive slider is also improved, guarantees the reliable power supply of high-speed rail.
The left and right edges formed between spiral grooves and inner wall of cylinder of the invention are convex structure, avoid piston in cylinder In cylinder when movement, piston face is damaged, and increases the service life of piston.
Serrate grooves on piston rod of the invention so that injection molding piston in conjunction with piston rod it is more firm.
The present invention is designed by the structure of innovation and the moulding process of piston rod and piston, so that production technology is simpler It is single, it is suitble to produce in enormous quantities.
A kind of high-speed rail contact line shock absorber structure of the invention is simple, and reliable performance is easy for installation, greatly reduces contact The production cost of line damper, is with a wide range of applications.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common The application protection all should belong in technical staff's every other embodiment obtained without making creative work Range.
As shown in Figure 1, a kind of high-speed rail contact line damper, including right end 1, cylinder barrel 2, piston rod 3, piston 4, intermediate ends First 5, left end 6；
Spiral grooves 2-1, the left side formed between 2 inner wall of spiral grooves 2-1 and cylinder barrel are machined on the right part inner wall of the cylinder barrel 2 Right hand edge is convex structure；
The middle part of the piston rod 3 has the serrate grooves 3-1 of mutual dislocation down through punch forming, and right end is machined with spiral shell Line, for the connection with external structure；
The piston 4 has the position of serrate grooves 3-1 at the middle part of piston rod 3 by injection molding, and the material of piston 4 is to increase Strong nylon piston, the piston 4 and piston rod 3 are shaped to the one being reliably connected；
Sealing element is provided in 5 periphery of intermediate end and inner hole, intermediate end 5 is fit into the specified of 2 middle part of cylinder barrel Position, by withholding the outer wall of cylinder barrel 2,2 inner wall section of cylinder barrel is embedded into the seal channel of intermediate 5 periphery of end, cylinder barrel 2 It is formed and is reliably connected between intermediate end 5, meanwhile, 2 inner wall of cylinder barrel and intermediate end form reliable sealing between 5 periphery；
The piston rod 3 is inserted into cylinder barrel 2 from right to left together together with piston 4, and sliding is formed between 2 inner wall of piston 4 and cylinder barrel Cooperation, the left part of piston rod 3 run through the inner hole of intermediate end 5, are formed between the left part of piston rod 3 and the inner hole of intermediate end 5 Reliable sealing；
Sealing element and dust guard are provided in the inner hole of the right end 1, the periphery of right end 1 is provided with sealing element, the right side End 1 is sleeved on the right part of piston rod 3, and is inserted into the right end of cylinder barrel 2, between the right part of piston rod 3 and the inner hole of right end 1 Form reliable sealing and dust-proof, the reliable sealing of formation between the periphery of right end 1 and the right end inner hole of cylinder barrel 2, by withholding cylinder The outer wall of cylinder 2,2 inner wall of cylinder barrel are embedded into the seal channel of 1 periphery of right end, are formed between cylinder barrel 2 and right end 1 reliable Connection；
The first working chamber A, the right side of the piston 4 and right end are formed between the left side of the piston 4 and the right side of intermediate end 5 It is formed between first 1 left side in the second working chamber B, the first working chamber A and the second working chamber B and is filled with working fluid；
The left part of the left end 6 is connection plunger, and the periphery of right part offers groove, the right part insertion cylinder barrel 2 of left end 6 In the inner hole of left end, by withholding the outer wall of cylinder barrel 2,2 inner wall section of cylinder barrel is embedded into the groove of 6 periphery of left end, cylinder barrel 2 It is formed and is reliably connected between left end 6；
Piston rod left part accommodating chamber C is formed between the right side of the left end 6 and the left side of intermediate end 5.
The material of above-mentioned intermediate end 5 and right end 1 is copper or enhancing nylon.
The course of work: a kind of left end 6 of high-speed rail contact line damper is fixedly mounted in tensioning clue, piston rod 3 Right end is connected in contact line by external structure.When high-speed rail operation, pantograph slides in contact line, forms contact line Vertical tremor.When contact line moves upwards, piston rod 3 and piston 4 is driven to move downward relative to left end 6 and cylinder barrel 2, Working fluid in first working chamber A is squeezed, and is flowed in the second working chamber B by spiral grooves 2-1, working fluid is flowing In dynamic process, damping is formed, is acted on piston 4, and reacted in contact line by piston rod 3, reduced and reduction connects The vibration for touching line, improves the service life of contact line and pantograph conductive slider, meanwhile, also improve contact line and pantograph Contact reliability between conductive slider guarantees the reliable power supply of high-speed rail.

Claims (2)

1. a kind of high-speed rail contact line damper, it is characterised in that: including right end (1), cylinder barrel (2), piston rod (3), piston (4), intermediate end (5), left end (6)；
It is machined with spiral grooves (2-1) on the right part inner wall of the cylinder barrel (2), between spiral grooves (2-1) and cylinder barrel (2) inner wall The left and right edges of formation are convex structure；
The middle part of the piston rod (3) has the serrate grooves (3-1) of mutual dislocation down through punch forming, and right end is machined with Screw thread, for the connection with external structure；
The piston (4) has the position of serrate grooves (3-1) by injection molding in the middle part of piston rod (3), piston (4) Material is enhancing nylon piston, and the piston (4) and piston rod (3) are shaped to the one being reliably connected；
Sealing element is provided in intermediate end (5) periphery and inner hole, intermediate end (5) is fit into the middle part of cylinder barrel (2) Designated position, by withholding the outer wall of cylinder barrel (2), cylinder barrel (2) inner wall section is embedded into the sealing of intermediate end (5) periphery In part slot, is formed and be reliably connected between cylinder barrel (2) and intermediate end (5), meanwhile, cylinder barrel (2) inner wall and intermediate end (5) periphery Between form reliable sealing；
The piston rod (3) together in piston (4) together insertion cylinder barrel (2) from right to left, piston (4) and cylinder barrel (2) inner wall it Between formed and be slidably matched, the left part of piston rod (3) runs through the inner hole of intermediate end (5), the left part of piston rod (3) and intermediate end (5) reliable sealing is formed between inner hole；
Sealing element and dust guard are provided in the inner hole of the right end (1), the periphery of right end (1) is provided with sealing element, institute It states right end (1) and is sleeved on the right part of piston rod (3), and be inserted into the right end of cylinder barrel (2), the right part and right end of piston rod (3) Reliable sealing and dust-proof is formed between the inner hole of head (1), is formed between the periphery of right end (1) and the right end inner hole of cylinder barrel (2) Reliable sealing, by withholding the outer wall of cylinder barrel (2), cylinder barrel (2) inner wall is embedded into the seal channel of right end (1) periphery, It is formed and is reliably connected between cylinder barrel (2) and right end (1)；
The first working chamber A, the right side of the piston (4) are formed between the left side of the piston (4) and the right side of intermediate end (5) It is formed between the left side of right end (1) in the second working chamber B, the first working chamber A and the second working chamber B and is filled with working oil Liquid；
The left part of the left end (6) is connection plunger, and the periphery of right part offers groove, and the right part of left end (6) is inserted into cylinder In the left end inner hole of cylinder (2), by withholding the outer wall of cylinder barrel (2), cylinder barrel (2) inner wall section is embedded into left end (6) periphery Groove in, formed and be reliably connected between cylinder barrel (2) and left end (6)；
Piston rod left part accommodating chamber C is formed between the right side of the left end (6) and the left side of intermediate end (5).
2. a kind of high-speed rail contact line damper according to claim 1, it is characterised in that: the intermediate end (5) and the right side The material of end (1) is copper or enhancing nylon.
CN201910588288.1A 2019-07-02 2019-07-02 A kind of high-speed rail contact line damper Pending CN110219924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910588288.1A CN110219924A (en) 2019-07-02 2019-07-02 A kind of high-speed rail contact line damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910588288.1A CN110219924A (en) 2019-07-02 2019-07-02 A kind of high-speed rail contact line damper

Publications (1)

Publication Number Publication Date
CN110219924A true CN110219924A (en) 2019-09-10

Family

ID=67815548

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910588288.1A Pending CN110219924A (en) 2019-07-02 2019-07-02 A kind of high-speed rail contact line damper

Country Status (1)

Country Link
CN (1) CN110219924A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114132228A (en) * 2022-01-13 2022-03-04 中南大学 Vibration reduction type contact net locating support for high-speed railway

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6202807B1 (en) * 1999-04-23 2001-03-20 Avraham Y. Levi Speed controlling hydraulic dampener
JP2001336572A (en) * 2000-05-25 2001-12-07 Oiles Ind Co Ltd Damper and building using the same
CN204512280U (en) * 2015-04-08 2015-07-29 衡水宝力工程橡胶有限公司 A kind of damper
CN106369100A (en) * 2016-09-06 2017-02-01 上海汇众汽车制造有限公司 Automobile back shock absorber and connection process thereof
CN106641244A (en) * 2015-10-30 2017-05-10 罗凤玲 Detachable piston rod joint and forming method thereof
CN206397995U (en) * 2017-01-18 2017-08-11 南京大德减震科技有限公司 A kind of new viscous damper
CN107781343A (en) * 2016-08-25 2018-03-09 上海建顾减震科技有限公司 Viscous damper
CN107893849A (en) * 2017-12-20 2018-04-10 山东天瑞重工有限公司 Hydraulic drill piston and preparation method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6202807B1 (en) * 1999-04-23 2001-03-20 Avraham Y. Levi Speed controlling hydraulic dampener
JP2001336572A (en) * 2000-05-25 2001-12-07 Oiles Ind Co Ltd Damper and building using the same
CN204512280U (en) * 2015-04-08 2015-07-29 衡水宝力工程橡胶有限公司 A kind of damper
CN106641244A (en) * 2015-10-30 2017-05-10 罗凤玲 Detachable piston rod joint and forming method thereof
CN107781343A (en) * 2016-08-25 2018-03-09 上海建顾减震科技有限公司 Viscous damper
CN106369100A (en) * 2016-09-06 2017-02-01 上海汇众汽车制造有限公司 Automobile back shock absorber and connection process thereof
CN206397995U (en) * 2017-01-18 2017-08-11 南京大德减震科技有限公司 A kind of new viscous damper
CN107893849A (en) * 2017-12-20 2018-04-10 山东天瑞重工有限公司 Hydraulic drill piston and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114132228A (en) * 2022-01-13 2022-03-04 中南大学 Vibration reduction type contact net locating support for high-speed railway
CN114132228B (en) * 2022-01-13 2024-05-07 中南大学 Vibration reduction type contact net positioning bracket for high-speed railway

Similar Documents

Publication Publication Date Title
CN110219925A (en) A kind of high-speed rail contact line damper
CN110219924A (en) A kind of high-speed rail contact line damper
CN203584960U (en) Hydraulic cylinder piston combined type sealing structure
CN204553668U (en) Metal slide sealing viscous damper
CN110332273A (en) A kind of high-speed rail contact line damper
CN108317125A (en) A kind of two-way multi-steering hydraulic piston oil cylinder of food machinery
CN205877053U (en) Two -way hydraulic absorber
CN203413221U (en) Electronic expansion valve
CN105215203A (en) The synchronous inside and outside hole flanging processing technology of a kind of high precision part and mould thereof
CN201836470U (en) Cartridge valve
CN104912870A (en) Sealing structure for pumping oil cylinder rod
CN210106288U (en) Hydraulic hoist with hydro-cylinder buffer function
CN211259203U (en) Hydraulic oil cylinder
CN204592010U (en) A kind of linear guide pairs sealing configuration
CN101285492B (en) Floating guiding hydraulic cylinder
CN202451688U (en) Covering piston for shock absorber
CN202023787U (en) Variable speed hydraulic cylinder
CN201333529Y (en) Bearing-ring turning numerical-control lathe
CN202125367U (en) Piston assembly
CN205350185U (en) Mechanical equipment is high stability piston structure for bumper shock absorber
CN219755198U (en) Mining large-tonnage nitrogen spring
CN211231392U (en) Novel return stroke self-decelerating nitrogen spring for inhibiting rebound of pressure plate
CN209800404U (en) Oil cylinder with firm piston
CN216199501U (en) Hydraulic oil cylinder with buffering effect
CN203560441U (en) Bidirectional combined sealing ring

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190910

RJ01 Rejection of invention patent application after publication