CN105422715B - Hydraulic auxiliary elastic support device - Google Patents
Hydraulic auxiliary elastic support device Download PDFInfo
- Publication number
- CN105422715B CN105422715B CN201511029055.6A CN201511029055A CN105422715B CN 105422715 B CN105422715 B CN 105422715B CN 201511029055 A CN201511029055 A CN 201511029055A CN 105422715 B CN105422715 B CN 105422715B
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- Prior art keywords
- metal
- seal membrane
- rubber
- rubber composite
- composite elastic
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Classifications
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- 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
- F16F9/106—Squeeze-tube devices
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reciprocating Pumps (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of hydraulic auxiliary elastic support device.It includes pedestal and metal-rubber composite elastic element, pedestal is connected with metal-rubber composite elastic element by fastener, metal-rubber composite elastic element includes rubber bodies and at least one layer of annular sheet metal being distributed in rubber bodies, the bottom of metal-rubber composite elastic element is provided with bottom inner chamber, bottom is provided with seal membrane in inner chamber, mounting groove is provided with pedestal, is mounted with mounting groove and screws disk, the bottom margin of seal membrane is pressed abd fixed in the mounting groove of pedestal by screwing disk.After said structure, reasonable in design, intercommunity is good, and ensure that the supply of hydraulic oil, inlet valve is located at the same side, fluid injection is facilitated, ensure that the reliability used, the cross sectional shape of annular sheet metal is beveled structure in addition, so that the side receiving area of elastomer is big, impact capacity is improved, the damage of metal and rubber combined flexible member is avoided, further ensures service life.
Description
Technical field
The present invention relates to a kind of resilient supporting unit, specifically hydraulic auxiliary elastic support device, belong to wind engine
Machine technical field.
Background technology
Metal is used for many engineering fields with rubber combined flexible member, is mainly used for decay vibration and power；Its bullet
Spring element typically has the rigidity of three-dimensional, i.e. X（Axially）、Y（Radially）, Z-direction (longitudinal direction) rigidity, the rigidity is by metallic framework, rubber
Type, size, taper and the quantity of glue-line predefine, and are designed in a suitable case in installation spring element
It is variable in a definite limitation afterwards.
In the installing and using of wind power generating set, existing structure is mechanical conditioning type gear case elastic support, for
Two toggles of its generating set are supported by resilient support respectively, and each toggle is by upper and lower two elastomer branch
Support, elastomer use precommpression mode when mounted, and upper and lower elastomer has certain pre compressed magnitude.Passed when needing to adjust
During dynamic chain shafting, by screw top on hemispherical jacking block, remake and use rubber elastomer.But it has been found that regulation
The vertical height regulation of mode is limited, and the cooperation to main shaft and axle sleeve has Over-constrained.In addition when needing to change elastomer,
It is difficult to take out upper and lower elastomer in the wind power generating set confined space.
Through retrieval, application number CN200810125442.3 Chinese patent discloses a kind of hydraulic pressure prestressing force elastomeric spring
Element and its use in wind turbine bearing, the invention specifically provide spring element and the axle comprising these spring elements
Hold, the spring rate of bearing and spring element can be by deformable elastic phosphor bodies or elastomer layer by applying prestressing force and independent
Regulation.Its sealing employs rubber crimping high pressure sealing mode, is expanded by fliud flushing mantle, is internally formed in resilient support
One hydraulic cavities, further elastic buffer effect is realized in addition to elastomeric spring element by hydraulic cavities.
Although it has been found that extremely low horizontal rigidity and vertical stiffness no longer Planar Mechanisms main shaft, as wind-force is sent out
Power technology tends to be ripe, and single-machine capacity constantly increases, and set structure also maximizes increasingly, and its structural dynamic characteristics is relatively more multiple
Miscellaneous, during work, elastomeric spring element is all the time in the state for bearing vibration, and thus its above-mentioned structure type will have and shake
Cited loosening is moved, sealing effectiveness is have impact on after loosening, it is impossible to reliable and stable pressure is provided, meanwhile, using process
It is middle to find under the operating modes such as driftage, it is small due to constraining with the rigidly connected main shaft of gear-box in 4 brace type double-fed blower fans, in inertia
The situation for frequently occurring to collide bearing block lower etc. load effect, and former design prestressing force elastomeric spring element is without adjusting apparatus
To adjust main shaft（It is rigidly connected with gear-box）Axle center so that ensureing the reliability of blower fan long-time steady operation reduces.
In addition, existing metal is arranged horizontally in rubber bodies with spring in rubber combined flexible member so that
Performance level analysis is poor, is easily deformed the damage for causing metal and rubber combined flexible member, have impact on service life.
The content of the invention
In order to solve the above-mentioned technical problem, the technical problem to be solved in the present invention is to provide one kind can improve sealed reliable
Property, so as to ensure the hydraulic auxiliary elastic support device of blower fan long-play stability.
In order to solve the above-mentioned technical problem, hydraulic auxiliary elastic support device of the invention, including pedestal and metal-rubber
Composite elastic element, pedestal are used for supporting toggle, metal rubber after connecting by fastener with metal-rubber composite elastic element
Glue composite elastic element includes rubber bodies and at least one layer of annular sheet metal being distributed in rubber bodies, metal-rubber composite elastic
The bottom of element sets the bottom inner chamber of oriented metal-rubber composite elastic element sunken inside, and bottom is provided with diaphragm seal in inner chamber
Piece, the mounting groove for installing seal membrane is provided with pedestal, is mounted with mounting groove and is compressed for seal membrane to be sealed
Screw disk, the bottom margin of seal membrane is pressed abd fixed in the mounting groove of pedestal by screwing disk.
There is the bottom margin of the seal membrane outside bulge protruded to outside seal membrane to divide and into seal membrane
The projecting inward part of protrusion, sunken inside is provided with the madial wall root B of the mounting groove, the bottom inside for screwing disk is set
Inner groove is equipped with, the projecting inward part and the sunken inside of mounting groove coordinate, and the inner groove with screwing disk is divided in the outside bulge
Coordinate.
Described screw is provided with transition disc in disk, flexible bound edge, the seal membrane are provided with the inner periphery of transition disc
Sealing is pressed in transition disc.
Positioning convex is provided with the mounting groove, the top surface of inner groove of the positioning convex with screwing disk is relative.
The cross sectional shape of the annular sheet metal is beveled structure.
The metal-rubber composite elastic element has four, after four metal-rubber composite elastic elements are installed with pedestal
It is respectively supported at the left side both sides up and down of toggle and the both sides up and down of right side toggle, four metal-rubber composite elastic elements
Seal membrane on be provided with interworking aperture, the seal membrane of metal-rubber composite elastic element and the gold of upper right side of lower left side
The seal membrane for belonging to rubber combined flexible member is connected by interworking aperture, the sealing of the metal-rubber composite elastic element of upper left side
The seal membrane of diaphragm and the metal-rubber composite elastic element of lower right side is connected by interworking aperture, is set on two of which pedestal
There is the inlet valve communicated with respective seal membrane inner chamber.
The inlet valve is connected on a triple valve by connecting line.
One pipeline of the triple valve is connected with vacuum extractor, the other pipeline connection priming device of triple valve
Or pressure-measuring system.
Pressure-measuring system is installed, the inlet valve is also connected by connecting line at the valve port of the inlet valve
Vacuum extractor.
The toggle of toggle or right side on the left of two base supports with the inlet valve.
Pressure gauge is provided with the priming device.
The connecting line is high-pressure rubber hose.
After above-mentioned structure, due to setting seal membrane and for seal installation seal membrane screw disk with
And mounting groove, after installation so that sealing is very good, can effectively prevent hydraulic fluid leak, so as to ensure that blower fan is transported for a long time
Capable stability, adapts to bigger single-machine capacity, and the connection of the intercommunication pipeline between four metal-rubber composite elastic elements makes
Must be reasonable in design, intercommunity is good, and ensure that the supply of hydraulic oil, and inlet valve is located at the same side, facilitates fluid injection and enters
One step ensure that the reliability used, and the cross sectional shape of annular sheet metal is beveled structure in addition so that is held the side of elastomer
It is big by area, impact capacity is improved, avoids the damage of metal and rubber combined flexible member, further ensures use
Life-span.
Brief description of the drawings
Fig. 1 is the installment state structural representation of hydraulic auxiliary elastic support device of the present invention；
Fig. 2 is pedestal and metal-rubber composite elastic element installment state structural representation in the embodiment of the present invention one；
Fig. 3 is mplifying structure schematic diagram at Fig. 2 A；
Fig. 4 is pedestal and metal-rubber composite elastic element installment state structural representation in the embodiment of the present invention two；
Fig. 5 is pedestal and metal-rubber composite elastic components broken down status architecture schematic diagram in the embodiment of the present invention two；
Fig. 6 is pipeline connection status structural representation in hydraulic auxiliary elastic support device of the present invention；
Fig. 7 is a kind of connection status structural representation for screwing disk and transition disc of hydraulic auxiliary elastic support device of the present invention
Figure；
Fig. 8 is that another of hydraulic auxiliary elastic support device of the present invention screws the connection status structure of disk and transition disc
Schematic diagram；
Fig. 9 vacuumizes status architecture schematic diagram for the first pressure measurement mode in the present invention；
Figure 10 is the first pressure measurement mode pressure measurement status architecture schematic diagram in the present invention；
Figure 11 vacuumizes status architecture schematic diagram for second of pressure measurement mode in the present invention；
Figure 12 is second of pressure measurement mode pressure measurement status architecture schematic diagram in the present invention.
Embodiment
With reference to the accompanying drawings and detailed description, it is further detailed to the hydraulic auxiliary elastic support device work of the present invention
Explanation.
Embodiment one：
As illustrated, the hydraulic auxiliary elastic support device of the present invention, including pedestal 1 and metal-rubber composite elastic element
2, pedestal 1 is used for supporting toggle 3, the compound bullet of metal-rubber after connecting by fastener with metal-rubber composite elastic element 2
Property element 2 include rubber bodies 4 and at least one layer of smooth annular sheet metal 5 for being distributed in rubber bodies, the compound bullet of metal-rubber
Property element 2 bottom the bottom inner chamber 6 of oriented metal-rubber composite elastic element sunken inside is set, be provided with bottom inner chamber 6
Seal membrane 7, the mounting groove 8 for installing seal membrane 7 is provided with pedestal 1, is mounted with mounting groove 8 for by diaphragm seal
What the sealing of piece 7 compressed screws disk 9, and the bottom margin of seal membrane 7 is pressed abd fixed in the mounting groove 8 of pedestal by screwing disk 9,
Specifically screwing disk 9 has external screw thread, and mounting groove 8 has internal thread, screws disk 9 and is connected with mounting groove 8 by internal and external threads.
For seal membrane 7, the bottom margin of seal membrane 7 has the outside bulge point protruded to outside seal membrane
With to the projecting inward projecting inward part of seal membrane, sunken inside is provided with the madial wall root B of mounting groove 8, it is described to screw disk 9
Bottom inside be provided with inner groove 10, the sunken inside of the projecting inward part and mounting groove 8 coordinates, the outside bulge point with
The inner groove 10 for screwing disk 9 coordinates, and positioning convex 11 is additionally provided with mounting groove 8, the positioning convex 11 is with screwing the interior of disk
The top surface of annular groove is relative, and sealing effectiveness is further increased by the positioning convex of setting.
Metal-rubber composite elastic element 2 has four, and four metal-rubber composite elastic elements 2 after pedestal installation with dividing
It is not supported on left side both sides up and down of the toggle and both sides up and down of right side toggle, four metal-rubber composite elastic elements
Interworking aperture 12, the seal membrane of metal-rubber composite elastic element and the gold of upper right side of lower left side are provided with seal membrane
The seal membrane for belonging to rubber combined flexible member is connected by interworking aperture, the sealing of the metal-rubber composite elastic element of upper left side
The seal membrane of diaphragm and the metal-rubber composite elastic element of lower right side is connected by interworking aperture, is set on two of which pedestal
There is the inlet valve 13 communicated with respective seal membrane inner chamber, inlet valve 13 is connected to a threeway by connecting line 14
On valve 15, there is the toggle on the left of two base supports of inlet valve 13 or the toggle on right side, set on priming device 16
Pressure gauge is equipped with, connecting line 14 is high-pressure rubber hose.
Wherein, when described inlet valve 13 is connected on a triple valve 15 by connecting line 14, triple valve 15
A pipeline be connected with vacuum extractor 17, the other pipeline connection priming device 16 of triple valve or pressure measxurement system
System, when needing to carry out pressure measxurement, from Fig. 9, Figure 10（The first pressure measurement mode）, inlet valve 13 have two connect
Mouthful, one of interface connects triple valve by connecting line, and another interface has sealing ring and plug, when vacuumizing,
Plug is closed, after exhausting air, plug can be outwarded winding, during pressure measurement, vacuum plant is closed, outwards winding plug（After exhausting gas）Carry out
Pressure measurement.
Pressure-measuring system is also equipped with the valve port of described inlet valve 13, inlet valve 13 also passes through connection
Pipeline connects vacuum extractor；When needing to carry out pressure measxurement, as shown in Figure 11, Figure 12（The first pressure measurement mode）, take out true
Space-time, plug is closed, after exhausting air, plug can be outwarded winding, after plug is outwarded winding, formed with hydraulic pressure inner chamber, liquid injection system close
Space is closed, after plug screws, liquid injection system can be removed, uses a plug leakproof；After plug screws closing, product
The pressure of inner hydraulic chamber is maintained, and now mechanical seal plays a major role, and sealing ring is only the effect of leakproof；Also need to
When what is illustrated is measuring system pressure, pressure gauge, pressure gauge base are connected on the inlet valve of pedestal first, pressure gauge base with
Inlet valve forms mechanical seal or seal with elastometic washer, after eliminating air using pumped vacuum systems, closes vacuum line, then unclamp
The plug of pedestal, so i.e. measurable current system pressure, after measurement, then plug is tightened and sealed up.
Embodiment two：
As illustrated, the hydraulic auxiliary elastic support device of the present invention, including pedestal 1 and metal-rubber composite elastic element
2, pedestal 1 is used for supporting toggle 3, the compound bullet of metal-rubber after connecting by fastener with metal-rubber composite elastic element 2
Property element 2 include rubber bodies 4 and at least one layer of annular sheet metal 5 for being distributed in rubber bodies, described annular sheet metal 5 is cut
Face is shaped as beveled structure, and the bottom of metal-rubber composite elastic element 2 sets oriented metal-rubber composite elastic element indent
Sunken bottom inner chamber 6, seal membrane 7 is provided with bottom inner chamber 6, the installation for installing seal membrane 7 is provided with pedestal 1
Groove 8, it is mounted with mounting groove 8 and screws disk 9 for what seal membrane 7 sealed into compression, the bottom margin of seal membrane 7 passes through rotation
Tight disk 9 is pressed abd fixed in the mounting groove 8 of pedestal.
On the basis of embodiment one and embodiment two, further, described seal membrane 7 can use with screwing disk
The following two kinds connected mode, it is a kind of as shown in fig. 7, screw the inner groove 10 of disk and screw disk upper interior end face between have it is flat
Sliding angle of inclination, screw in disk 9 and be provided with transition disc（Spinning disk）18, flexible bound edge is provided with the inner periphery of transition disc 18
19, the sealing of seal membrane 7 is pressed in transition disc, and the flexibility thus achieved between seal membrane 7 and transition disc 18 is flexible coupling,
Another is screwed as shown in figure 8, screwing has vertical angle between the inner groove 10 of disk and the upper interior end face for screwing disk
Transition disc 18 is provided with disk 9, flexible bound edge 19 is provided with the inner periphery of transition disc 18, the sealing of seal membrane 7 was pressed on
To cross in disk, the flexibility thus achieved between seal membrane 7 and transition disc 18 is flexible coupling, the setting of above two connected mode,
So that friction between transition disc and spinning disk between metal and metal, its rubbing surface scribble lubricating oil or spary coating type solid
Lubricant, the contact surface of transition disc and seal membrane 7 is encapsulated, realizes the flexible soft company between seal membrane 7 and transition disc 18
Connect, and for transition disc（Spinning disk）Concrete structure for, both could be arranged to overall structure, transition disc can also be set
The split-type structural formed for outer disk body and inner tray two parts.
Claims (8)
1. a kind of hydraulic auxiliary elastic support device, including pedestal (1) and metal-rubber composite elastic element (2), pedestal (1) and
Metal-rubber composite elastic element (2) is used for supporting toggle (3) after connecting by fastener, it is characterised in that：The metal
Rubber combined flexible member (2) includes rubber bodies (4) and at least one layer of annular sheet metal (5) being distributed in rubber bodies, described
The bottom of metal-rubber composite elastic element (2) sets the bottom inner chamber (6) of oriented metal-rubber composite elastic element sunken inside,
Seal membrane (7) is provided with the bottom inner chamber (6), the peace for installing seal membrane (7) is provided with the pedestal (1)
Tankage (8), interior be mounted with of the mounting groove (8) screw disk (9), the diaphragm seal for compress seal membrane (7) sealing
The bottom margin of piece (7) is pressed abd fixed in the mounting groove (8) of pedestal by screwing disk (9), and the disk (9) that screws has outer spiral shell
Line, mounting groove (8) have internal thread, screw disk (9) and are connected with mounting groove (8) by internal and external threads, the seal membrane (7)
Bottom margin has the outside bulge protruded to outside seal membrane point and to the projecting inward projecting inward part of seal membrane, the peace
Sunken inside is provided with the madial wall root B of tankage (8), the bottom inside for screwing disk (9) is provided with inner groove (10), institute
State projecting inward part and the sunken inside of mounting groove (8) coordinates, the outside bulge point is matched somebody with somebody with screwing the inner groove (10) of disk (9)
Close, positioning convex (11), the top surface phase of inner groove of the positioning convex (11) with screwing disk are provided with the mounting groove (8)
Right, described screw in disk (9) is provided with transition disc (18), and flexible bound edge (19), institute are provided with the inner periphery of transition disc (18)
Seal membrane (7) sealing is stated to be pressed in transition disc.
2. according to the hydraulic auxiliary elastic support device described in claim 1, it is characterised in that：The annular sheet metal (5)
Cross sectional shape is beveled structure.
3. according to the hydraulic auxiliary elastic support device described in claim 1, it is characterised in that：The metal-rubber composite elastic
Element (2) has four, and four metal-rubber composite elastic elements (2) after pedestal installation with being respectively supported at left side toggle
Upper and lower both sides and the both sides up and down of right side toggle, it is provided with mutually on the seal membrane of four metal-rubber composite elastic elements
Port (12), the seal membrane of the metal-rubber composite elastic element of lower left side and the metal-rubber composite elastic element of upper right side
Seal membrane connected by interworking aperture, the seal membrane of metal-rubber composite elastic element and the metal of lower right side of upper left side
The seal membrane of rubber combined flexible member is connected by interworking aperture, is provided with two of which pedestal (1) and respective sealing
The inlet valve (13) that diaphragm inner chamber communicates.
4. according to the hydraulic auxiliary elastic support device described in claim 3, it is characterised in that：The inlet valve (13) passes through
Connecting line (14) is connected on a triple valve (15).
5. according to the hydraulic auxiliary elastic support device described in claim 4, it is characterised in that：One of the triple valve (15)
Pipeline is connected with vacuum extractor (17), the other pipeline connection priming device (16) or pressure-measuring system of triple valve.
6. according to the hydraulic auxiliary elastic support device described in claim 3, it is characterised in that：The valve of the inlet valve (13)
Pressure-measuring system is installed at mouthful, the inlet valve (13) also connects vacuum extractor by connecting line.
7. according to the hydraulic auxiliary elastic support device described in claim 3, it is characterised in that：With the inlet valve (13)
Two base supports on the left of toggle or right side toggle.
8. according to the hydraulic auxiliary elastic support device described in claim 5, it is characterised in that：Set on the priming device (16)
Pressure gauge is equipped with, the connecting line (14) is high-pressure rubber hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029055.6A CN105422715B (en) | 2015-12-31 | 2015-12-31 | Hydraulic auxiliary elastic support device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029055.6A CN105422715B (en) | 2015-12-31 | 2015-12-31 | Hydraulic auxiliary elastic support device |
Publications (2)
| Publication Number | Publication Date |
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| CN105422715A CN105422715A (en) | 2016-03-23 |
| CN105422715B true CN105422715B (en) | 2018-02-02 |
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| CN201511029055.6A Active CN105422715B (en) | 2015-12-31 | 2015-12-31 | Hydraulic auxiliary elastic support device |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882990B (en) * | 2017-10-17 | 2023-11-14 | 株洲时代新材料科技股份有限公司 | Seal for liquid compound spring and liquid compound spring |
| CN107630970B (en) * | 2017-10-17 | 2024-02-20 | 株洲时代新材料科技股份有限公司 | Liquid compound spring for gear box hydraulic supporting device |
| CN107701702A (en) * | 2017-10-17 | 2018-02-16 | 株洲时代新材料科技股份有限公司 | A kind of hydraulic support device for gear-box |
| CN107654648B (en) * | 2017-10-17 | 2024-02-27 | 株洲时代新材料科技股份有限公司 | Seal for liquid compound spring and liquid compound spring |
| CN107906200A (en) * | 2017-10-17 | 2018-04-13 | 株洲时代新材料科技股份有限公司 | Seal and liquid compound spring for liquid compound spring |
| CN108843721B (en) * | 2018-07-09 | 2019-05-31 | 中国地质大学（武汉） | Liquid metal rubber damping and generating integration device |
| CN115038232B (en) * | 2022-06-21 | 2023-12-08 | 苏州杰腾电子有限公司 | Structure and method for enhancing contact strength of electronic circuit surface |
| CN115898978B (en) * | 2022-11-16 | 2023-09-22 | 湖南福能液压科技有限公司 | Automatic pressure supplementing system of hydraulic elastic support |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4523737B2 (en) * | 2001-04-27 | 2010-08-11 | 株式会社ニフコ | Damper device |
| EP2003362B1 (en) * | 2007-06-14 | 2017-11-01 | FM Energie GmbH & Co. KG | Hydraulically pre-tensioned elastomeric spring element and its use in bearings for wind power facilities |
| CN201751627U (en) * | 2010-07-08 | 2011-02-23 | 镇江铁科橡塑制品有限公司 | Wind generating set gear box elastic support device |
| CN202322320U (en) * | 2011-10-25 | 2012-07-11 | 株洲时代新材料科技股份有限公司 | Liquid filling device |
| CN104235252B (en) * | 2013-06-13 | 2017-10-31 | 通用电气公司 | Hydraulic damper and method for electrical switchgear |
| CN204828608U (en) * | 2015-06-02 | 2015-12-02 | 株洲时代新材料科技股份有限公司 | Vibration damper |
| CN205479085U (en) * | 2015-12-31 | 2016-08-17 | 江苏铁科新材料股份有限公司 | Resilient supporting unit is assisted to hydraulic pressure |
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