CN107165042B - Imidazoles ball-type bridge pad - Google Patents
Imidazoles ball-type bridge pad Download PDFInfo
- Publication number
- CN107165042B CN107165042B CN201710565702.8A CN201710565702A CN107165042B CN 107165042 B CN107165042 B CN 107165042B CN 201710565702 A CN201710565702 A CN 201710565702A CN 107165042 B CN107165042 B CN 107165042B
- Authority
- CN
- China
- Prior art keywords
- ball
- plate
- imidazoles
- counterbore
- bridge pad
- 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.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
- E01D19/046—Spherical bearings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a kind of imidazoles ball-type bridge pad, friction structure includes ball-type friction structure and plane friction structure；The ball-type friction structure construction are as follows: ball-and-socket is formed in lower support plate, and then a spherical crown liner plate is provided, the spherical surface and ball-and-socket of the spherical crown liner plate cooperate, and the bottom surface of spherical crown liner plate is upper, it is provided with the pit with counterbore in bottom surface, remembers that part of the pit in addition to counterbore is foundation pit；Planar friction structure construction are as follows: the lower surface of upper bracket plate is installed with a stainless steel plate, and the bottom hole of the stainless steel plate and the counterbore cooperates, and closes foundation pit based on the cooperation of stainless steel plate and counterbore bottom hole；Wherein, imidazoles salt liquid is filled up in foundation pit.It is maintainable more preferable according to the present invention under conditions of guaranteeing compared with high bearing capacity.
Description
Technical field
The present invention relates to a kind of ball-type bridge pads.
Background technique
Ball-type bridge pad is the bridge pad to grow up on the basis of pot rubber bearing, earlier ball-type bridge
Support can be found in Chinese patent literature CN2515232Y, have a ball-and-socket in lower support plate, and ball-and-socket is provided with a spherical crown
Liner plate forms lower friction structure between spherical crown liner plate and ball-and-socket.The upper surface of spherical crown liner plate is plane, for passing through upper friction structure
Accept upper bracket plate.Upper friction structure usually by the polyfluortetraethylene plate that is installed in spherical crown liner plate upper surface and is located at upper bracket plate
The stainless steel plate of lower surface is constituted.Wherein polyfluortetraethylene plate relatively easily fails.
In order to reduce the coefficient of friction of upper friction structure, in some implementations, inserted on the rubbing surface of upper friction structure
Lubricant, to reduce the coefficient of friction of upper friction structure, but structure still can not overcome polyfluortetraethylene plate to be easy to lose whereby
The problem of effect, is polyfluortetraethylene plate in addition to frictional force to be carried, and also to carry the weight that upper bracket plate transmits.
Then replace polyfluortetraethylene plate to prolong using filled polytetrafluoroethylene plate in Chinese patent literature CN101492906A
The service life of long ball-type bridge pad, filled polytetrafluoroethylene plate has relatively high bearing capacity, however, its is compound
The surface of intermediate layer sliding plate is still pure polytetrafluoroethylene ethylene layer, and still relatively easy failure, there is still a need for the corresponding frictions of carrying
And heavy duty.
Chinese patent literature CN101705722A then uses multiple slip face to mitigate the frictional dissipation of single slide surface, but more
Slide surface will increase the height of bridge pad, weaken whole stability, in order to keep bridge pad higher with comparing
Stability needs additional other structures, is that overall structure is relatively complicated.
Chinese patent literature CN101545291A then discloses a kind of magnetic suspension structure, can be made by magnetic suspension structure
Normal pressure between flowering structure rubbing surface, so as to so that the rate of wear of such as polyfluortetraethylene plate slows down.But magnetic suspension is often
Face between magnet up and down is needed not can guarantee face between magnet up and down when generating sliding, bridge pad can be made to generate power of toppling
Square, and make bridge pad bad stability.
Summary of the invention
The purpose of the present invention is to provide one kind under conditions of guaranteeing compared with high bearing capacity, maintainable better imidazoles
Class ball-type bridge pad.
Embodiment according to the present invention provides a kind of imidazoles ball-type bridge pad, including upper bracket plate and lower support plate,
And be mounted between lower support plate bridge pad is mobile or the friction structure in rotation work face providing, the friction knot
Structure includes ball-type friction structure and plane friction structure；The ball-type friction structure construction are as follows: ball is formed in lower support plate
Nest, and then provide a spherical crown liner plate, the spherical surface of the spherical crown liner plate and ball-and-socket cooperate, and the bottom surface of spherical crown liner plate is opened in bottom surface upper
There is the pit with counterbore, remembers that part of the pit in addition to counterbore is foundation pit；
Planar friction structure construction are as follows: the lower surface of upper bracket plate is installed with a stainless steel plate, the stainless steel plate with it is described
The bottom hole of counterbore cooperates, and closes foundation pit based on the cooperation of stainless steel plate and counterbore bottom hole；
Wherein, imidazoles salt liquid is filled up in foundation pit.
Above-mentioned imidazoles ball-type bridge pad, optionally, imidazoles salt liquid are also partially filled with stainless steel plate and counterbore
Between gap.
Optionally, one is provided in upper bracket plate for supplementing the channel of imidazoles salt liquid, the import in the channel is furnished with
Plug.
Optionally, the imidazoles salt liquid is -3 methylimidazole cobalt tetracarbonyl salting liquid of 1- ethyl acetate.
Optionally, planar friction structure surrounds counterbore, is equipped with upper seal.
Optionally, the stainless steel plate includes being installed in the substrate of upper bracket plate lower surface and with substrate one and to downward
Reach the protrusion of counterbore bottom hole.
Optionally, dust-proof coaming plate is additionally provided with around friction structure；
The top of dust-proof coaming plate is fixedly mounted in upper bracket plate.
Optionally, the foundation pit is ball-and-socket, and ball-and-socket depth and ball-and-socket basal diameter are positively correlated.
Optionally, counterbore depth is not less than 1.5mm, and is not more than 5.0mm.
Optionally, there are gaps between the bottom surface of spherical crown liner plate and the lower surface of upper bracket plate.
Embodiment according to the present invention is different from the mobile slide surface of conventional bridge pad using stainless steel plate and poly- four
The friction engageable surface of vinyl fluoride plate, and use the major part of friction engageable surface and engaged for stainless steel plate with imidazoles salt liquid
Structure, become solid-solid friction into compound friction structure, the compound friction structure include solid-solid friction and solid-liquid friction, substantially
Coefficient of friction is reduced, and spherical crown liner plate is hardly damaged, reduces maintenance times, and improves maintainability.
Detailed description of the invention
Fig. 1 is along bridge in an embodiment to longitudinally-moving bridge pad half section structure diagram.
Fig. 2 is the portion the A enlarged drawing of Fig. 1.
Fig. 3 is direction across bridge longitudinally-moving bridge pad half section structure diagram in an embodiment.
Fig. 4 is the laterally movable bridge pad half section structure diagram of direction across bridge in an embodiment.
Fig. 5 is along bridge in an embodiment to laterally movable bridge pad half section structure diagram.
Fig. 6 is multidirectional mobile bridges support half section structure diagram in an embodiment.
In figure: 1. dust-proof coaming plates, 2. lower seals, 3. upper seals, 4. upper bracket plate bolts, 5. upper bracket plates, 6. are not
Become rusty steel plate, 7. glyoxaline ion liquids, 8. spherical crown liner plates, 9. spherical surface stainless steel plates, 10. channels, 11. spherical crown supra polymers poly- four
Vinyl fluoride plate, 12. lower support plates, 13. lower support plate bolts.
Specific embodiment
The realization of the object of the invention depends on the physical attribute of liquid itself, it will be understood by those of skill in the art that liquid
The compression ratio of body is very small, or even all smaller than many solids, and under effective sealing, liquid can be used as solid use in principle,
And there is very strong face bearing capacity.
Typically, hydraulic cylinder is the main application of above-mentioned principle, is different from cylinder, the precision of cylinder is very low, and liquid
Cylinder pressure then has relatively high precision, in that gas differs very big with the compression ratio of liquid.
In technical field of bridge, or even in entire technical field, it is common that for low-friction coefficient face, especially
Plate face, with very high flatness, and stainless steel plate 6 as shown in Figure 2, rubbing surface should equally have good flat
Cooperation in face degree, stainless steel plate 6 and Fig. 2 in spherical crown liner plate 8 between counterbore bottom hole has a very high compatible degree, and bridge pad
Carrying such as bridge beam body is generally required, so as to provide friction engageable surface very big engaging force, it is ensured that imidazoles
Saline solution body can be effectively sealed in foundation pit.
Figure of description 1 is along bridge to longitudinally-moving bridge pad half section structure diagram, remaining attached drawing in addition to Fig. 2 is
It is current common to concentrate bridge pad structure, as it can be seen that its friction structure reconstruct for being realized based on imidazoles class I liquid I, principle in figure
On be it is the same, below only with shown in Figure of description 1 along bridge to longitudinally-moving bridge pad half section structure diagram, and tie
It closes attached drawing 2 to be illustrated, for other kinds of bridge pad, it is to be easy to manage that those skilled in the art, which is based on the present embodiment,
It solves and realizes.
For bridge pad, as shown in Figure 1, lower support plate 12 is fixed by lower support plate bolt 13 and such as bridge pier column
Connection, upper bracket plate 5 are fixedly connected by upper bracket plate bolt 4 with such as bridge beam body, then when bridge beam body deformation, movement
When, relative motion can be generated between upper lower support plate, if be fixedly connected between upper bracket plate 5 and lower support plate 12, it is likely that meeting
Bridge pad is caused to be damaged.Therefore, friction structure can be set between upper bracket plate 5 and lower support plate 12, it is above-mentioned for balancing
Relative motion.
Friction structure between upper lower support plate generally comprises two parts and at least wraps for ball-type bridge pad
Containing two parts, one of part is ball-type friction structure, is normally in the following, another part is planar friction structure,
It is normally above.
Wherein ball-type friction structure is principal element of the spherical bearing why it is referred to as ball-type bridge pad, basic structure
Making is: in general, being equipped with a boss in lower support plate 12, being processed from the upper surface of boss, processes ball-and-socket, so
The spherical crown liner plate of one with ball-and-socket cooperation, spherical crown liner plate and then one spherical crown liner plate of offer, the spherical surface of the spherical crown liner plate 8 are provided afterwards
Cooperate with ball-and-socket, the land portions and ball-and-socket of spherical crown liner plate 8 cooperate, to provide pivoting friction.
The bottom surface of upper surface, that is, spherical crown liner plate 8 of spherical crown liner plate 8 is then used to provide mobile friction.
In addition, the bottom surface of spherical crown liner plate 8 processes pit, shrinkage pool includes two parts of counterbore and foundation pit, and wherein counterbore removes
Outside the supporting surface for providing stainless steel plate 6, wall surface is also used to constrain the range of stainless steel plate 6, therefore, the skill of this field
Art personnel design the size of counterbore based on the range of mobile friction.
In the present embodiment, part of the note pit in addition to counterbore is foundation pit, more acurrate drop, in Fig. 2, for accommodating imidazoles
The part of class particle liquid 7 is foundation pit.
For planar friction structure, construction are as follows: the lower surface of upper bracket plate 5 is installed with a stainless steel plate 6, the stainless steel
The bottom hole of plate 6 and the counterbore cooperates, and closes foundation pit based on the cooperation of stainless steel plate 6 and counterbore bottom hole, and closing mode is main
The normal pressure generated by upper bracket plate 5 above-mentioned and institute's load.
Stainless steel plate 6 is located at the part in counterbore, should have in the range of being constrained in the horizontal direction by counterbore certain
Activity space, which has determined the sliding range of stainless steel plate 6, has determined upper bracket plate 5 in undersetting in other words
Sliding range on plate 12.
It is to be further understood that on the basis of the radial direction of 8 bottom surface of spherical crown liner plate, when stainless steel plate 6 slides to a direction
When to maximum value, with the party in the opposite direction on, stainless steel plate 6 cannot be disengaged with the bottom hole of counterbore, otherwise can not close base
Hole.
Wherein, imidazoles salt liquid is filled up in foundation pit.
To imidazoles salt liquid, there is more research in machinery field, since the present invention is not directed to the material
Research can not explain, may refer to this only to the application of the imidazoles salt liquid for frictional interface,
As disclosed in " the tribology behavioral study of two kinds of ionic liquids " (" lubrication and sealing " 2006, Zhang Shengmao, Li Jian, generation rush)
Two kinds of imidazoles salt liquid, such as 1- butyl -3- methyl imidazolium tetrafluoroborate and 1 ethoxy -3- methyl imidazolium tetrafluoroborate.
It should be appreciated that liquid here refers to the solution of imidazoles salt, in the solution, compound exists with ionic means,
Therefore the liquid in terms of also known as such tribology is particle liquid.
Similarly, for another example " tribology research of ion liquid lubricant " (" synthesis lubriation material " -2008, Zhu Liye, it is old
Render meritorious service), all refer to the Tribological Applications of ionic liquid.
Preferred -3 methylimidazole cobalt tetracarbonyl salting liquid of 1- ethyl acetate, inventor mention in the preferred embodiment of the invention
For the salt the preparation method is as follows:
It is synthesized by two-step process, the first step first passes through the nucleophilic substitution of N- methylimidazole and ethyl chloroacetate, preparation
The halogen of-the 3- of ethyl acetate base containing 1- methyl imidazolium cation out；Second step carries out ion-exchange reactions again, uses sodium tetracarbonyl cobaltate
In [Co (CO)4]—Anion replaces Cl—Ion finally obtains -3 methylimidazole cobalt tetracarbonyl saline solution of 1- ethyl acetate
Body.
Friction-wear test is done to -3 methylimidazole cobalt tetracarbonyl salt liquid of 1- ethyl acetate of synthesis, coefficient of friction is
Shown in following table, friction system of the coefficient of friction shown by following table far below between stainless steel plate and polyfluortetraethylene plate 0.07 ~ 0.15
Number.
When carrying out bridge pad assembly again, it is desirable that imidazoles saline solution body can be completely filled with foundation pit, therefore, in filling imidazoles
When class salt liquid, the imidazoles salting liquid that volume is greater than foundation pit volume can be inserted, is that imidazoles salting liquid is relatively viscous
Thick, mobility is poor in other words, if loading is smaller, be easy to cause filling it is not firm, fill in other words it is insufficient, filling compared with
More imidazoles salting liquids can squeeze out bubble etc., the imidazoles of surplus then by generated pressure after assembly
Salting liquid can enter or spill into the gap between stainless steel plate 6 and counterbore.
It fills in sufficient foundation pit, if its bearing capacity can be effectively improved without bubble, in this technology item
Under part, there are also the gaps being filled between stainless steel plate 6 and counterbore for being exactly imidazoles salting liquid meeting part for generated phenomenon.
Gap between stainless steel plate 6 and counterbore is by after relatively sticky imidazoles saline solution filler, moreover it is possible to play certain
Sealing function, in other words, as shown in Fig. 2, certain sealability can be generated.
It correspondingly,, may under the conditions of environment converts etc. even because in seasonal variations based on reasons such as diffusion, volatilizations
It causes a small amount of imidazoles salting liquid to be lost, in order to provide continual and steady bearing capacity, one is provided in upper bracket plate 4 for mending
The channel 10 of imidazoles salt liquid is filled, the import in the channel 10 is furnished with plug.
The preferred silk plug of plug.
Based on content above-mentioned it is found that used imidazoles salt liquid is solution after all, solute may volatilize, solute
After volatilization, the liquid that can make is more sticky, and total amount can also be reduced, and in order to reduce the loss of imidazoles salt liquid, plane is rubbed
It wipes structure and surrounds counterbore, be equipped with upper seal 3.
In general, the stainless steel plate 6 for being assemblied in 5 lower surface of upper bracket plate is often planar panel structure, to adapt to this
The embodiment of invention, used stainless steel plate 6 needs to have the structure for adapting to aforementioned counterbore, in view of this, described stainless
Steel plate 6 is although surface plate can also be used, inevitably since stainless steel plate 6 at this time can be thicker, in upper bracket
Assembly on plate 5 is relatively difficult, in view of this, in preferred embodiment, as shown in Fig. 2, stainless steel plate 6 includes being installed in
The substrate of upper bracket plate lower surface and with substrate one and extend downwardly into the protrusion of counterbore bottom hole.
Projected area of the substrate in the plane for being parallel to 8 bottom surface of spherical crown liner plate is greater than the throwing in the same plane of protrusion
Shadow area, in other words, substrate have assembly space, and substrate can compare it is relatively thin, be easy assembly.
As further protection, it is additionally provided with dust-proof coaming plate 1 around friction structure, to reduce dust engaging friction structure
Amount makes the rubbing surface of friction structure keep relatively clean.
Preferably, the top of dust-proof coaming plate 1 is fixedly mounted in upper bracket plate 5, the dust-proof coaming plate in upper bracket plate 5
The 1 dust-proof coaming plate than being located in lower support plate 12 is more easier to construct, and the range constrained is smaller, does not influence bridge pad
Movement.
In preferred embodiment, the foundation pit is ball-and-socket, and one side difficulty of processing is relatively low, on the other hand, can also be produced
Life must boundary friction effect, make to be formed by friction structure more stable.
Furthermore, it is necessary to take into account correlative factor be that ball-and-socket depth and ball-and-socket basal diameter are positively correlated.
In principle, counterbore is smaller, is more conducive to assemble, and used quantity of material is also smaller, but as previously mentioned, counterbore
Also need to carry out stroke control and accommodating portion imidazoles salt liquid, therefore, depth is also unsuitable too small, in view of this, by
Experiment determines that counterbore depth is not less than 1.5mm, and is not more than 5.0mm.
In order to reduce interference, there are gaps between the bottom surface of spherical crown liner plate 8 and the lower surface of upper bracket plate 5.
Claims (10)
1. a kind of imidazoles ball-type bridge pad, including upper bracket plate and lower support plate, and be mounted between lower support plate
Bridge pad is mobile or the friction structure in rotation work face providing, which includes ball-type friction structure and plane
Friction structure；It is characterized in that, the ball-type friction structure construction are as follows: be formed with ball-and-socket in lower support plate, and then provide one
Spherical crown liner plate, the spherical surface and ball-and-socket of the spherical crown liner plate cooperate, and the upper surface of spherical crown liner plate is provided with the pit with counterbore, remembers pit
Part in addition to counterbore is foundation pit；
Planar friction structure construction are as follows: the lower surface of upper bracket plate is installed with a stainless steel plate, the stainless steel plate and the counterbore
Bottom hole cooperation, and foundation pit is closed in the cooperation based on stainless steel plate and counterbore bottom hole；
Wherein, imidazoles salt liquid is filled up in foundation pit.
2. imidazoles ball-type bridge pad according to claim 1, which is characterized in that imidazoles salt liquid is also partly filled out
Fill the gap between stainless steel plate and counterbore.
3. imidazoles ball-type bridge pad according to claim 1 or 2, which is characterized in that be provided with one in upper bracket plate
For supplementing the channel of imidazoles salt liquid, the import in the channel is furnished with plug.
4. imidazoles ball-type bridge pad according to claim 1, which is characterized in that the imidazoles salt liquid is 1- second
- 3 methylimidazole cobalt tetracarbonyl salting liquid of acetoacetic ester.
5. imidazoles ball-type bridge pad according to claim 1, which is characterized in that planar friction structure surrounds counterbore,
Equipped with upper seal.
6. imidazoles ball-type bridge pad according to claim 1 or 5, which is characterized in that the stainless steel plate includes dress
It is located at the substrate of upper bracket plate lower surface and with substrate one and extends downwardly into the protrusion of counterbore bottom hole.
7. imidazoles ball-type bridge pad according to claim 6, which is characterized in that be additionally provided with around friction structure dust-proof
Coaming plate；
The top of dust-proof coaming plate is fixedly mounted in upper bracket plate.
8. imidazoles ball-type bridge pad according to claim 1, which is characterized in that the foundation pit is ball-and-socket, and ball-and-socket is deep
Degree is positively correlated with ball-and-socket basal diameter.
9. imidazoles ball-type bridge pad according to claim 1 or claim 7, which is characterized in that counterbore depth is not less than
1.5mm, and it is not more than 5.0mm.
10. imidazoles ball-type bridge pad according to claim 1, which is characterized in that the bottom surface of spherical crown liner plate and upper branch
There are gaps between the lower surface of seat board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710565702.8A CN107165042B (en) | 2017-07-12 | 2017-07-12 | Imidazoles ball-type bridge pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710565702.8A CN107165042B (en) | 2017-07-12 | 2017-07-12 | Imidazoles ball-type bridge pad |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165042A CN107165042A (en) | 2017-09-15 |
| CN107165042B true CN107165042B (en) | 2019-01-22 |
Family
ID=59823873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710565702.8A Active CN107165042B (en) | 2017-07-12 | 2017-07-12 | Imidazoles ball-type bridge pad |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107165042B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2143024C1 (en) * | 1999-05-14 | 1999-12-20 | Открытое акционерное общество "Мостотрест" | Supporting part of bridge |
| CN201381474Y (en) * | 2009-01-22 | 2010-01-13 | 成都市新筑路桥机械股份有限公司 | Spherical steel supporting seat |
| CN201534956U (en) * | 2009-06-15 | 2010-07-28 | 衡水橡胶股份有限公司 | Self-lubricating curved steel support for bridge |
| CN203096602U (en) * | 2012-12-19 | 2013-07-31 | 洛阳双瑞特种装备有限公司 | Durable anti-wear spherical bearing for railroad bridge |
| CN205741892U (en) * | 2016-05-31 | 2016-11-30 | 镇江伟民新材料制品有限公司 | A kind of bridge support sliding plate for high ferro of high intensity |
-
2017
- 2017-07-12 CN CN201710565702.8A patent/CN107165042B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2143024C1 (en) * | 1999-05-14 | 1999-12-20 | Открытое акционерное общество "Мостотрест" | Supporting part of bridge |
| CN201381474Y (en) * | 2009-01-22 | 2010-01-13 | 成都市新筑路桥机械股份有限公司 | Spherical steel supporting seat |
| CN201534956U (en) * | 2009-06-15 | 2010-07-28 | 衡水橡胶股份有限公司 | Self-lubricating curved steel support for bridge |
| CN203096602U (en) * | 2012-12-19 | 2013-07-31 | 洛阳双瑞特种装备有限公司 | Durable anti-wear spherical bearing for railroad bridge |
| CN205741892U (en) * | 2016-05-31 | 2016-11-30 | 镇江伟民新材料制品有限公司 | A kind of bridge support sliding plate for high ferro of high intensity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107165042A (en) | 2017-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104863909B (en) | With the spring pressurizing closed hydraulic oil container of volume, pressure and leakage detection function | |
| CN107165042B (en) | Imidazoles ball-type bridge pad | |
| CN209228762U (en) | A kind of hydraulic leg oil cylinder | |
| CN2660236Y (en) | Device of increasing magnetic liquid sealing pressure durable abilities of reciprocating shaft | |
| CN107588199B (en) | Adjustable magnetic floating oil mist sealing device | |
| CN108951405A (en) | A kind of large-tonnage spherical steel bearing for being easily installed and safeguarding | |
| CN204717038U (en) | Novel quick closing valve hard seal fixing ball valve | |
| CN110219382A (en) | A kind of anti-buckling support of efficient energy-consumption self-resetting | |
| CN112828835A (en) | Multi-degree-of-freedom static pressure decoupling platform | |
| CN106762600B (en) | A kind of highly pressurised liquid plunger pair based on gas barrier | |
| CN109273918A (en) | A kind of pluggable electric connection hydraulic compensating device of underwater wet-type | |
| US20170016478A1 (en) | Compact bearing system and machine stage system equipping the same | |
| CN106151525A (en) | A kind of single-end surface mechanical sealing device of improvement | |
| CN107905094A (en) | A kind of adaptive bridge pad | |
| CN209656530U (en) | A kind of antifriction apparatus that can measure coefficient of friction | |
| CN107727314A (en) | Reductor sealing property test equipment and method of testing | |
| CN105625164A (en) | Bridge damping structure | |
| CN207598633U (en) | A kind of High-performance static hydraulic support servo actuator | |
| CN211171585U (en) | Totally-enclosed rubber support with guide device | |
| JP2001323963A (en) | Base isolating device | |
| CN204785021U (en) | Valve stem guide mechanism | |
| CN201666371U (en) | Dynamic seal structure used for floating and rotating machine | |
| CN214394111U (en) | Multi-degree-of-freedom static pressure decoupling platform | |
| CN105840461B (en) | Balanced type crank gear | |
| CN203009365U (en) | Nuclear main pump with fluid obstruction apparatus |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |