CN109458030A - Hydraulic drive Self-resetting support device - Google Patents
Hydraulic drive Self-resetting support device Download PDFInfo
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- CN109458030A CN109458030A CN201811401564.0A CN201811401564A CN109458030A CN 109458030 A CN109458030 A CN 109458030A CN 201811401564 A CN201811401564 A CN 201811401564A CN 109458030 A CN109458030 A CN 109458030A
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- anchor plate
- oil cylinder
- piston rod
- hydraulic drive
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- 239000003921 oil Substances 0.000 claims abstract description 50
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 25
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 2
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0235—Anti-seismic devices with hydraulic or pneumatic damping
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The present invention relates to a kind of hydraulic drive Self-resetting support devices, comprising: oil cylinder, piston rod, first piston, second piston, third piston, hydraulic oil, the first anchor plate, the second anchor plate and presstressed reinforcing steel；First piston, second piston and third piston are successively set in oil cylinder, and piston rod is arranged on the central axis of oil cylinder, and second piston is fixedly connected on the piston rod, and first piston, third piston activity are worn on the piston rod；First anchor plate and the second anchor plate are connected by the presstressed reinforcing steel；Hydraulic oil is equipped in oil cylinder between the first piston and the third piston.The piston that hydraulic drive Self-resetting support device provided by the invention passes through the different effective surface areas of setting, utilize hydraulic principle, in the case where presstressed reinforcing steel deformability is certain, it is zoomed in and out by the deformability that the device supports Self-resetting, solves the drawbacks of presstressed reinforcing steel automatic runback device deformability is not able to satisfy civil engineering antidetonation demand.
Description
Technical field
The present invention relates to civil engineering energy-dissipating and shock-absorbing apparatus fields, support and fill more particularly to a kind of hydraulic drive Self-resetting
It sets.
Background technique
The energy of earthquake and harm are self-evident, and people currently still can not accurately predict the generation of earthquake, most in being intended to
All methods reduce the loss of earthquake bring as far as possible, and one way in which is that development subtracts seismic isolation technology, and in this technique one
The common equipment of kind is automatic runback device.
There are more drawbacks for existing automatic runback device, it is difficult to meet practical engineering application: shape-memory alloy wire is made
It involves great expense to reset the automatic runback device of material, unstable mechanical property has varied with temperature biggish fluctuation；Prestress steel
There are the insufficient defects of deformability for twisted wire automatic runback device；The load of disc spring automatic runback device is difficult, and construction is complicated；FRP tendons are certainly
Resetting apparatus tensioning and anchoring are difficult, and deformability is insufficient.
Therefore, the Self-resetting energy consumption that novel deformability is strong, cheap, manufacture is relatively easy, performance is stable is developed
Device is practical engineering application urgent problem.
Summary of the invention
Based on this, it is necessary at least one problem mentioned above, provide a kind of hydraulic drive Self-resetting support dress
It sets.
A kind of hydraulic drive Self-resetting support device, comprising: oil cylinder, piston rod, first piston, second piston, third are living
Plug, hydraulic oil, the first anchor plate, the second anchor plate and presstressed reinforcing steel；The first piston, second piston and third piston are pre-
There are piston rod penetration hole, first piston, second piston and third piston are successively set in the oil cylinder, and the piston rod is set
It sets on the central axis of the oil cylinder, the second piston is fixedly connected on the piston rod, and first piston activity is threaded through
On the piston rod；First anchor plate and second anchor plate are separately positioned near the oil cylinder both ends of the surface, described
First anchor plate is connected with second anchor plate by the presstressed reinforcing steel；Between the first piston and the third piston
Oil cylinder in be equipped with hydraulic oil, the first piston can be connected on first anchor plate, and the third piston can be connected to
On second anchor plate；First anchor plate is equipped with through-hole, and the through-hole passes through for the piston rod, the piston rod
One end extends on the outside of first anchor plate.
Define in one of the embodiments, in the second piston towards the end face of the first piston be left side,
Effective area is A2a, towards the end face of the third piston it is right side, effective area A in the second piston2b；Definition
The effective area of the first piston is A1, the effective area A of third piston3；There are following proportionate relationship, A2a/A1=A2b/A3。
The piston rod extends near second anchor plate in one of the embodiments, and the third piston is living
It is dynamic to be threaded through on the piston rod.
Further, defining the diameter of piston rod between the first piston and second piston is D1, the second piston
Diameter of piston rod between the third piston is D2；D1/D2=λ, λ are default fixed constant.
Second anchor plate is equipped with through-hole in one of the embodiments, and the push-pull rod other end extends to institute
It states on the outside of the second anchor plate.
Restricting orifice is additionally provided in the oil cylinder in one of the embodiments, the restricting orifice is equipped with several
Through-hole with preset area.
Choke block is additionally provided in the oil cylinder in one of the embodiments, the choke block is fixed at the oil
In cylinder, the choke block is equipped with center hole, and the diameter of the center hole is greater than the diameter of piston rod.
The first piston is equipped with top pillar towards the end face of first anchor plate in one of the embodiments,；Institute
It states third piston and is equipped with top pillar towards the end face of second anchor plate.
In one of the embodiments, the presstressed reinforcing steel by anchorage respectively with first anchor plate and described second
Anchor plate connection.
Hydraulic drive Self-resetting support device further includes connecting bracket in one of the embodiments, the connecting bracket
One end is arranged on the oil cylinder outer surface near second anchor plate.
Hydraulic drive Self-resetting support device provided by the invention utilizes liquid by the piston of the different effective surface areas of setting
Pressure principle is contracted in the case where presstressed reinforcing steel deformability is certain by the deformability that the device supports Self-resetting
It puts, solves the drawbacks of presstressed reinforcing steel automatic runback device deformability is not able to satisfy civil engineering antidetonation demand.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of hydraulic drive Self-resetting support device in one embodiment of the invention；
Fig. 2 is the structural schematic diagram of hydraulic drive Self-resetting support device in another embodiment of the present invention；
Fig. 3 is the operating structure schematic diagram of hydraulic drive Self-resetting support device in another embodiment of the present invention；
Fig. 4 is the another operating structure schematic diagram of hydraulic drive Self-resetting support device in another embodiment of the present invention；
Fig. 5 is the structural schematic diagram of hydraulic drive Self-resetting support device in further embodiment of this invention.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
A kind of hydraulic drive Self-resetting support device is provided in one embodiment of the invention, as shown in Figure 1, including at least:
Oil cylinder 100, piston rod 300, first piston 210, second piston 220, third piston 230, hydraulic oil, the first anchor plate 410,
Two anchor plates 420 and presstressed reinforcing steel 500, naturally it is also possible to there are other not refer to but fastener commonly used in the art, sealing element etc..
Wherein first piston 210, second piston 220 and third piston 230 are successively set in oil cylinder 100, and the setting of piston rod 300 exists
On the central axis of oil cylinder 100, and second piston 220 is fixedly connected on piston rod 300, i.e. second piston 220 and piston rod
300 are linked together, and when movement is opposing stationary.210 activity of first piston is threaded through on piston rod 300, i.e., first piston 210 can
It is moved on piston rod 300.First anchor plate 410 and the second anchor plate 420 are separately positioned near 100 both ends of the surface of oil cylinder, anchor
Solid plate is not connect with oil cylinder 100 directly, and the first anchor plate 410 and the second anchor plate 420 are connected by presstressed reinforcing steel 500, i.e.,
Two pieces of anchor plates are connected as one by presstressed reinforcing steel 500, and have certain initial tension stress, first piston 210 thereon
Or third piston 230 can act on anchor plate, to transfer force on presstressed reinforcing steel 500, it is preferred that the presstressed reinforcing steel
500 are connect with first anchor plate 410 and second anchor plate 420 respectively by anchorage.First piston 210 and third are living
It fills in and is equipped with hydraulic oil in the oil cylinder 100 between 230, known to those skilled in the art, seal approach should be taken to ensure that hydraulic oil is protected
Hold in preset spatial position, be respectively arranged junction setting sealing device, namely first piston 210 and piston rod 300 it
Between, or even between third piston 230 and piston rod 300 sealing ring is set.First piston 210 can be connected to the first anchor plate
On 410, and third piston 230 can be connected on the second anchor plate 420, can be realized by the way that the thickness of piston is arranged, certainly may be used
Bulge-structure is set on the surface of piston, it is preferred that first piston 210 is equipped with first towards the end face of the first anchor plate 410
Top pillar 211, third piston 230 are equipped with the second top pillar 231 towards the end face of the second anchor plate 420, by the first top pillar 211 or
Second top pillar, 231 ejection the first anchor plate 410 or the second anchor plate 420.First anchor plate 410 is equipped with through-hole 421, through-hole
421 pass through for piston rod 300, and 300 one end of piston rod extends to 410 outside of the first anchor plate.Piston rod 300 is not only used
In transmitting on extraneous push-pull effort to hydraulic drive Self-resetting support device, and anchor plate and presstressed reinforcing steel 500 can be made to hang
On oil cylinder 100.
In wherein another embodiment, as shown in Fig. 2, to can extend to the second anchor plate 420 attached for the piston rod 300
Closely, 230 activity of third piston is threaded through on piston rod 300.
As a preferred scheme, define in the second piston 220 towards the end face of the first piston 210 for a left side
End face, effective area A2a, towards the end face of the third piston 230 it is right side, effective area in the second piston 220
For A2b；The effective area for defining the first piston 210 is A1, the effective area A of third piston 2303；Then first piston 210,
There are following proportionate relationship, A for second piston 220 and each effective area of third piston 2302a/A1=A2b/A3, wherein effective area
The circular area of piston rod is subtracted for the end rounded face of piston, actually the area of pistons end annulus.As shown in Figure 3 and Figure 4,
Assuming that S is displacement of the piston rod 300 with respect to oil cylinder 100, S1Displacement for first piston 210 with respect to oil cylinder 100, S2It is living for second
The displacement of the opposite oil cylinder 100 of plug 220, S3Displacement for third piston 230 with respect to oil cylinder 100.Define area ratio coefficientAssuming that liquid volume is incompressible, then
A2a×S2=A1×S1
A2b×S2=A3×S3
S2=S
Define the displacement zoom factor of first piston 210The displacement of third piston 230 scales system
NumberThen
The β to known to1=β3=η, i.e. the displacement zoom factor size of the present apparatus are equal to piston area ratio.
The above mathematical relationship demonstrates tension and compression operating condition bottom offset scaling equal proportion relationship, and piston rod 300 goes out with respect to oil cylinder 100
Cylinder, the displacement that first piston 210 moves are proportional to the displacement of piston rod 300；Piston rod 300 is shunk with respect to oil cylinder 100, third
The displacement and the displacement of piston rod 300 that piston 230 moves are also proportional, and two displacement scale coefficients are equal, and size is equal to piston
Area ratio coefficient.Namely the compression of support both ends is identical with stretching operating condition bottom offset scaling, the proportionality coefficient desirable 0.25
~0.5.500 stretch-draw anchor of presstressed reinforcing steel anchors both ends, and the first anchor plate in the first anchor plate 410 and the second anchor plate 420
410 abut with oil cylinder 100 and/or first piston 210, the second anchor plate 420 is abutted with oil cylinder 100 and/or third piston 230,
The deformation of presstressed reinforcing steel 500 is related to the cylinder displacement out of first piston 210 or third piston 230, deforms energy in presstressed reinforcing steel 500
In the case that power is certain, Self-resetting is supported by the device deformability (i.e. the displacement stroke of present apparatus piston rod 300)
It amplifies, solves the drawbacks of 500 automatic runback device deformability of presstressed reinforcing steel is not able to satisfy civil engineering antidetonation demand.With
For 1860 grades of prestress wire automatic runback devices, the ultimate elongation of 1860 grades of prestress wires is only 1% or so, in advance
Pretensioning apply prestressing force by use 0.3% or so elongation, remaining subsequent effective deformation ability is only that presstressed reinforcing steel 500 is long
The 0.7% of degree, is unsatisfactory for the requirement for the axial stretching rate 2% that civil engineering work earthquake-resistant structure field supports Self-resetting, when
Using the method for this patent, taking first piston 210 and 230 opposing pistons bar 300 of third piston to be displaced zoom factor is 1/3, i.e.,
The 300 axial stretching rate of piston rod of 1860 grades of prestress wire automatic runback devices can be expanded to 2.1%, sufficiently meet building
The anti-demand shaken greatly of structure.
It is further preferred that defining 300 diameter of piston rod between first piston 210 and second piston 220 is D1, second
300 diameter of piston rod between piston 220 and third piston 230 is D2；D1/D2=λ, λ are default fixed constant.Second piston
Oil cylinder 100 where the section of 220 operations generallys use lesser internal diameter, certainly, can also take biggish internal diameter as needed,
By changing diameter of the piston rod 300 in different zones, change the cross-sectional area of piston rod 300, to change first piston
210 and second piston 220 effective area.
As a preferred scheme, as shown in figure 5, restricting orifice 600 is additionally provided in oil cylinder 100, the restricting orifice
600 are equipped with several through-holes with preset area, and hydraulic oil is allowed to pass through.Choke block is fixedly connected in oil cylinder, and not
The movement that can hinder piston rod, when there is piston rod to pass through, choke block needs to seal between piston rod.If first piston 210 with
100 inner cavity of oil cylinder between second piston 220 is the first oil pocket, and the inner cavity between second piston 220 and third piston 230 is the
The restricting orifice 600 of throttle orifice, when piston rod 300 stretches, second is respectively set in two oil pockets in the first oil pocket and the second oil pocket
Piston 220 forces hydraulic oil quickly through throttle orifice, generates viscous damping force, consumes externally input energy, and mechanical energy is turned
Turn to interior energy.Principle formula are as follows: Fd=CVα, in formula: FdFor damping force (kN), C is damped coefficient (kN/ (mm/s)), and V is piston
The speed (mm/s) of movement, α is Rate Index, and selected, the value generally between 0.01~1 is designed according to engine request.
It is then linear damping as α=1.The main function of hydraulic device is scaling displacement, limited in 500 deformability of presstressed reinforcing steel
In the case where, the deformability of Self-resetting support is improved, restricting orifice 600 is added in oil cylinder 100, hydraulic device is also expansible
As viscous damper.The support is mounted in civil engineering structure, may be either that structure provides reset force, and can consume ground
Shake inputs to the energy of civil engineering structure.Another feasible program is that choke block is equally arranged in oil cylinder, the throttling
Plate is fixedly disposed at a certain position of oil cylinder, without being opened up on choke block such as the throttle orifice on restricting orifice, is only needed
The diameter setting of the center hole passed through for piston rod is larger, it is larger than the diameter of piston rod, in piston rod and choke block
Center hole between reserve certain gap, played the role of by the gap identical with throttle orifice, such result can be convenient for
The processing of choke block, thin device structure reduce production cost.
As a preferred scheme, through-hole also is provided on the second anchor plate 420, described 300 one end of piston rod extends to
First anchor plate, 410 outside, the other end extend to 420 outside of the second anchor plate.Two sides can provide structure connection
Site.
In a wherein preferred embodiment, hydraulic drive Self-resetting support device further includes connecting bracket 700, described
700 one end of connecting bracket is arranged on 100 outer surface of oil cylinder near second anchor plate 420.
Preferably, the initial tensioning pretightning force and radical of presstressed reinforcing steel 500 are according to device and the reset force of structure
Size requirement and set.
In a wherein preferred embodiment, first piston 210 and third piston 230 can connect in oil cylinder external application connecting rod
It connects, keeps moving synchronously.
Preferably, setting choke block is expanded into the hydraulic drive Self-resetting support dress for adding viscous energy consumption function
It sets, the hydraulic oil with the certain movement coefficient of viscosity need to be selected, the size of kinematic coefficient of viscosity need to meet setting for damped coefficient
Meter requires.
The hydraulic drive Self-resetting support device that the present invention provides through the above technical solution, using piston positive pressure area ratio
Command displacement scaling, in the case where presstressed reinforcing steel deformability is certain, the ability of amplification support axial displacement is good full
The displacement stroke demand of sufficient civil engineering work earthquake-resistant structure.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of hydraulic drive Self-resetting support device characterized by comprising oil cylinder, piston rod, first piston, second live
Plug, third piston, hydraulic oil, the first anchor plate, the second anchor plate and presstressed reinforcing steel；The first piston, second piston and
Three pistons are successively set in the oil cylinder, and the piston rod is arranged on the central axis of the oil cylinder, and the second piston is solid
Surely it is connected on the piston rod, first piston activity is threaded through on the piston rod；First anchor plate and described second
Anchor plate is separately positioned near the oil cylinder both ends of the surface, and first anchor plate and second anchor plate pre- are answered by described
The connection of power muscle；Hydraulic oil is equipped in oil cylinder between the first piston and the third piston, the first piston can abut
On first anchor plate, the third piston can be connected on second anchor plate；First anchor plate is equipped with logical
Hole, the through-hole pass through for the piston rod, and described piston rod one end extends on the outside of first anchor plate.
2. hydraulic drive Self-resetting support device according to claim 1, which is characterized in that define in the second piston
It is left side, effective area A towards the end face of the first piston2a, towards the third piston in the second piston
End face is right side, effective area A2b；The effective area for defining the first piston is A1, the effective area of third piston
A3.；There are following proportionate relationship, A2a/A1=A2b/A3。
3. hydraulic drive Self-resetting support device according to claim 1, which is characterized in that the push-pull rod extends to institute
It states near the second anchor plate, the third piston activity is threaded through on the piston rod.
4. hydraulic drive Self-resetting support device according to claim 3, which is characterized in that define the first piston with
Diameter of piston rod between second piston is D1, the diameter of piston rod between the second piston and the third piston is D2；
D1/D2=λ, λ are default fixed constant.
5. hydraulic drive Self-resetting support device according to claim 3, which is characterized in that set on second anchor plate
There is through-hole, the push-pull rod other end extends on the outside of second anchor plate.
6. hydraulic drive Self-resetting support device according to claim 1, which is characterized in that be additionally provided with section in the oil cylinder
Discharge orifice plate, the restricting orifice are equipped with several through-holes with preset area.
7. hydraulic drive Self-resetting support device according to claim 1, which is characterized in that be additionally provided with section in the oil cylinder
Flowing plate, the choke block are fixed in the oil cylinder, the choke block be equipped with center hole, the center hole it is straight
Diameter is greater than the diameter of piston rod.
8. hydraulic drive Self-resetting support device according to claim 1, which is characterized in that the first piston is towards institute
The end face for stating the first anchor plate is equipped with top pillar；The third piston is equipped with top pillar towards the end face of second anchor plate.
9. hydraulic drive Self-resetting support device according to claim 1, which is characterized in that the presstressed reinforcing steel passes through anchor
Tool is connect with first anchor plate and second anchor plate respectively.
10. hydraulic drive Self-resetting support device according to claim 1, which is characterized in that it further include connecting bracket, institute
Connecting bracket one end is stated to be arranged on the oil cylinder outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811401564.0A CN109458030B (en) | 2018-11-22 | 2018-11-22 | Hydraulic transmission self-resetting supporting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811401564.0A CN109458030B (en) | 2018-11-22 | 2018-11-22 | Hydraulic transmission self-resetting supporting device |
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| Publication Number | Publication Date |
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| CN109458030A true CN109458030A (en) | 2019-03-12 |
| CN109458030B CN109458030B (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811401564.0A Active CN109458030B (en) | 2018-11-22 | 2018-11-22 | Hydraulic transmission self-resetting supporting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111189599A (en) * | 2020-01-09 | 2020-05-22 | 中国人民解放军63921部队 | Sliding shock insulation and absorption vibration table model test system capable of being reset quickly and test method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109458030B (en) | 2024-06-25 |
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