CN110144822A - Suspension bridge space big corner, permanent seal cooling hoist cable connection structure - Google Patents
Suspension bridge space big corner, permanent seal cooling hoist cable connection structure Download PDFInfo
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- CN110144822A CN110144822A CN201910375014.4A CN201910375014A CN110144822A CN 110144822 A CN110144822 A CN 110144822A CN 201910375014 A CN201910375014 A CN 201910375014A CN 110144822 A CN110144822 A CN 110144822A
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- hoist cable
- otic placode
- bearing
- connection structure
- suspension bridge
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- 239000000725 suspension Substances 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims description 45
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 25
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 25
- 239000000314 lubricant Substances 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 13
- -1 polyethylene Polymers 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 210000002435 tendon Anatomy 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
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- 238000005452 bending Methods 0.000 abstract description 10
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- 238000005260 corrosion Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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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
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- 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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to a kind of suspension bridge space big corners, permanent seal cooling hoist cable connection structure, tensioning is between cord clip and beam-ends above and below hoist cable, including cable body, the upper and lower side correspondence of cable body is anchored in anchor cup, in lower anchor cup, upper anchor cup is at the top of it, lower anchor cup is respectively arranged with the hoist cable otic placode with pin hole in its bottom, the hoist cable otic placode on hoist cable top and the cord clip otic placode with pin hole are rotatablely connected by pin shaft, the hoist cable otic placode of hoist cable bottom end and the beam-ends otic placode with pin hole are rotatablely connected by pin shaft, oscillating bearing is provided at the pin hole cooperation of pin shaft and otic placode, the otic placode includes hoist cable otic placode, cord clip otic placode or beam-ends otic placode.When the steel box-girder of hoist cable is when along bridge to moving under direction across bridge load, oscillating bearing can meet rotary oscillation and wallowing motion, the even compound oscillating of the two, to avoid hoist cable from bending, eliminate the bending stress acted on hoist cable, the freedom degree of hoist cable deflection is improved, hoist cable stretch bending fatigue is reduced.
Description
Technical field
The present invention relates to the upper and lower anchor head of the sling of suspension bridge connection structures with cord clip, girder steel respectively, more particularly, to one kind
The connection structure that hoist cable is deflected in space both direction can be achieved.
Background technique
Force transmission parts of the hoist cable as suspension bridge, it is living that self structure will bear vehicle, wind etc. than relatively fine, in use process
Load effect, so hoist cable is to be easiest to that fatigue rupture occurs in suspension bridge component.In practical bridge, hoist cable design when
It is more abundant to wait safety coefficient consideration, it is not easy to the strength failure of static(al) occur.But the external environment as locating for hoist cable compares
Badly, corrosion fatigue is easy to happen by the coupling of the fatigue stress of the erosion of corrosive medium and mobile load generation.In addition,
Steel box-girder is easy to produce the swing along bridge vertical, horizontal under dynamic loading, and hoist cable is caused to bear repeatedly by curved, particularly across in
Drop shot rope is easier to that fatigue rupture therefore occurs.Mainly under live loading, hoist cable bears the xial feed of variation, steel wire internal force
Constantly change therewith, this reciprocal variation will lead to inner wire and be subjected to back and forth drawing alternate stress, be easy to cause hoist cable knot
Fatigue rupture occurs for structure inner wire.
In addition, anchor head and girder junction can generate corner under hoist cable due to the swing of alternate load effect and steel box-girder,
If anchor device structure is unreasonable, answer the steel wire of anchor head junction under hoist cable by reciprocal bending
Power causes section of steel wire stress to generate stretch bending combined stress circulation and generate steel wire fatigue.Sling of suspension bridge service life is long, long
Phase exposure in the natural environment, subjects the comprehensive function of the factors such as environmental attack, extraneous load, fatigue effect, wherein corrosion
It will cause hoist cable durability with two big factors of fatigue and bearing capacity be greatly reduced.
The fatigue loading for reducing hoist cable, the endurance quality for improving hoist cable are worth those skilled in the art's deep thinking.
Summary of the invention
Inventor is carried out hoist cable pulling force and is turned by the analysis to hoist cable stretch bending stress and its coupling effect
The research of angle Two indices Fatigue Damage Mode and life appraisal, developing one kind can adapt to space big corner, have the curved property of tension
The hoist cable connection structure of energy, alleviates the stretch bending fatigue of sling of suspension bridge especially drop shot rope, and that improves sling of suspension bridge uses the longevity
Life.
The present invention solves the above problems used technical solution are as follows: a kind of suspension bridge space big corner, permanent seal cooling hoist cable
Connection structure, tensioning is between cord clip and beam-ends up and down for hoist cable, including cable body, the upper and lower side of cable body is corresponding be anchored in anchor cup,
In lower anchor cup, the upper anchor cup is at the top of it, the lower anchor cup in its bottom is respectively arranged with the hoist cable otic placode with pin hole, hoist cable
The hoist cable otic placode on top and the cord clip otic placode with pin hole are by pin shaft rotation connection, the hoist cable otic placode of hoist cable bottom end and with pin hole
Beam-ends otic placode is rotatablely connected by pin shaft.Hoist cable bottom end: being provided with oscillating bearing at the pin hole cooperation of pin shaft and lower ear plate, under this
Otic placode refers to one of hoist cable otic placode and beam-ends otic placode of bottom end, which meets hoist cable can be in non-perpendicular pin shaft
It is deflected in plane；Hoist cable top: being provided with bushing at the pin hole cooperation of pin shaft and upper ear plate, upper ear plate refers to hanging for top
One of cringle plate and cord clip otic placode, the bushing are fixed on pin hole inner wall, and pin shaft and sleeve clearances cooperate.
Above-mentioned cable body is mainly by the parallel wire unit of twisting and the inner layer polyethylene sheath that is wrapped in outside steel tendon and outer
Layer pe sheath.General internal layer sheath is black polyethylene sheath, and outer protective sleeve is colored pe sheath.
Above-mentioned steel tendon is constituted using the zinc-containing alloy coating wire of several diameter 5mm-7mm through 3 degree to 4 degree twistings.
The oscillating bearing of the application includes bearing inner race and bearing outer ring, and bearing inner race has spherical outside surface, bearing outer ring tool
There is Internal Spherical Surface, bearing outer ring is fixed in the pin hole of lower ear plate, and bearing inner race is movably arranged in the ball of bearing outer ring
And internal and external spherical surfaces constitute movable sphere-contact, the pin hole that bearing inner race setting is passed through for the pin shaft.
Wide-angle deflection is realized in space in order to adapt to hoist cable, the spherical outside surface arc length for further designing bearing inner race is significant
Greater than the Internal Spherical Surface arc length of bearing outer ring, and central angle corresponding to half of the Internal Spherical Surface beyond the arc length difference of spherical outside surface is axis
Inner ring is held with respect to the hard-over that bearing outer ring deflects.
In order to improve the service life of oscillating bearing, need to improve the wear resistance of bearing inner race, bearing outer ring, into one
PTFE fiber fabric is arranged as lubricant layer in step on spherical outside surface and the contact surface of Internal Spherical Surface, realizes oscillating bearing oneself
Lubricating action.And preferably the PTFE fiber fabric is arranged in the Internal Spherical Surface of bearing outer ring, in this way, in spherical outside surface and
The lubricant layer is not exposed always when Internal Spherical Surface relatively rotates.
The smoothness of contact spherical surface is related to the service life of oscillating bearing, will in foreign matter intrusive contact spherical surface once having
It influences, the bearing outer ring or bearing inner race are provided with sealing structure at Internal Spherical Surface or spherical outside surface, which constitutes anti-
The only sealing of invasion contact spherical surface.
Above-mentioned sealing structure is arranged at the both sides of the edge of bearing outer ring, respectively constitutes bearing outer ring two sides to contact ball
The sealing in face, is made of seal groove and fixing ring, and fixing ring is arranged in seal groove, and the lip of the fixing ring
Mouth keeps the sealing effect of sliding contact with the spherical outside surface of bearing inner race.
Specifically, along the exposed notch that is axially formed of bearing outer ring, the fixing ring has the seal groove
The bevel edge lip in the notch is overflowed, the bevel edge lip and bearing inner race are interference fitted and realize and be adjacent to spherical outside surface always, the mistake
Cooperation of being full of refers to that bevel edge lip size occurs slight deformation with bearing inner race at the time of contact and be tightly attached to slightly above design value
On spherical outside surface.Further, bevel edge lip has contact section, is bonded by the contact section with the spherical outside surface of bearing inner race,
Realize face contact type sealing.
Sealing effect is improved in order to increase the elasticity of sealing ring, offering groove or inner hole on the bevel edge lip makes to have
Elastic characteristic, such bevel edge lip, in spherical outside surface, keep movable abutting state, in elastic reaction to adapt to hoist cable rotation process
The dynamic sealing of the contact spherical surface of middle variation.
It is installed in place and installs fixation for the ease of sealing ring, the fixing ring is provided with positioning gear outstanding
There is the step radially extended along bearing outer ring, the rib and step to constitute in the radial direction of bearing outer ring for side, the notch
It contradicts and realizes positioning.
Preferable setting is, the pin hole radial interference fit of the bushing and otic placode is so that bushing is clamped in pin hole, two
There is no relative motion between person.Bushing includes annular backing, and the annular backing internal perisporium is provided with polytetrafluoroethylene fibre and knits
Object lubricant layer, the pin shaft being through in annular backing inner hole and lubricant layer activity cooperate, and improve freedom of movement, realize that lubrication is made
With the abrasion both reduced.
Preferably, bushing has sealing structure, and the seal groove including being arranged on annular backing inner hole and setting are close at this
O-ring seal in sealing groove, the O-ring seal act on the pin shaft being through in annular backing inner hole；Sealing structure has two
Place setting position is located at annular backing two sides, constitutes end part seal to lubricant layer both ends respectively, prevents foreign matter intrusion lubrication
Layer causes to wear.
Compared with the prior art, the advantages of the present invention are as follows: the connection structure connecting structure of the application sling of suspension bridge is adopted
The hoist cable otic placode with pin hole is set used in the anchor cup end of hoist cable upper and lower ends, beam-ends otic placode is set on steel box-girder, is set on cord clip
Cord clip otic placode is set, the hoist cable otic placode and cord clip otic placode, the hoist cable otic placode of bottom and beam-ends otic placode at top are rotated by pin shaft respectively
Connection.And the oscillating bearing of special designing is further set at the cooperation of pin shaft and otic placode pin hole, the sky of hoist cable is realized with this
Between corner, when the steel box-girder of hoist cable is when along bridge to moving under direction across bridge load, oscillating bearing, which can meet, rotary oscillation and to incline
It tiltedly swings or even the compound oscillating of the two eliminates the bending stress acted on hoist cable so that hoist cable be avoided to bend,
The freedom degree of hoist cable deflection is improved, hoist cable stretch bending fatigue is reduced.
The application has carried out special designing to oscillating bearing, belongs to a big corner self-lubricating knuckle bearing.
(1) by increasing the width of bearing inner race and the outer diameter of bearing outer ring, the corner for improving bearing realizes hoist cable
Big corner deflection.
(2) abrasion resistance of big corner oscillating bearing is improved as lubricant layer by PTFE (polytetrafluoroethylene (PTFE)) fabric
Energy.The lubricant layer of common joints bearing is mostly the coating materials such as molybdenum disulfide, Teflon (or use PU copper wire gasket), by
After bearing outer ring coating on inner surface (or pasting pad), then it is extruded from bearing inner race trap.Use moistening certainly for these materials
Sliding oscillating bearing wear-resisting property is poor, and bearing clearance is big, restricts the wear-resistant service life of component in some aspects.Select PTFE
(polytetrafluoroethylene (PTFE)) fabric is the oscillating bearing of self-lubricating material, then can overcome the disadvantages that drawbacks described above, and from bearing strength, anti-corrosion
Property, fretting wear, use.PTFE (polytetrafluoroethylene (PTFE)) fabric be the materials such as PTFE and glass fibre (or aramid fiber) into
Row weaving, and the manufactured compound fabric after impregnation have intensity height, the small feature of coefficient of friction.This fiber is knitted
Object is applied on hoist cable big corner self-lubricating knuckle bearing, and hoist cable big corner oscillating bearing is made both to have maintained high-mechanic, automatic tune
The characteristic of the heart, and the features such as have self-lubricating, impact resistance, long-life concurrently.
(3) special sealing structure is constituted using the seal groove of special designing and special-shaped seal ring, it can be to bearing outer ring
Effectively sealing is constituted with the movable contact spherical surface of bearing inner race, foreign matter intrusion bearing working surface can be prevented and influence bearing
Service life.
(4) self-lubricating bushing is set at cord clip otic placode and the cooperation of hoist cable otic placode, keeps hoist cable cleverer with respect to cord clip otic placode
Free deflection living, reduces deflection resistance, improves durability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of hoist cable in the embodiment of the present invention；
Fig. 2 is the side view of structure shown in Fig. 1；
Fig. 3 is cable body interface schematic diagram；
Fig. 4 is the connection structure of cord clip end hoist cable otic placode and cord clip otic placode；
Fig. 5 is the connection structure of girder steel end carriage end otic placode and cord clip otic placode；
Fig. 6 be girder steel along bridge to mobile condition under the motion mode of hoist cable and connector；
Fig. 7 is the motion mode of the hoist cable and connector under the mobile condition of girder steel direction across bridge；
Fig. 8 is the portion A enlarged drawing in Fig. 7；
Fig. 9 is the front view of oscillating bearing in the embodiment of the present invention；
AA cross-sectional view in Figure 10 bitmap 9；
Figure 11 is the maximum angle that oscillating bearing shown in Figure 10 is deflected to side.
Figure 12 is the partial enlarged view of bearing inner race, bearing outer ring fit structure；
Figure 13 is the portion A enlarged drawing in Figure 12；
Figure 14 is the cross-sectional view of special-shaped seal ring；
Figure 15 is the front view of special-shaped seal ring；
Figure 16 is the axial sectional view of bushing；
Figure 17 is the portion A enlarged drawing in Figure 16；
Figure 18 is the portion B enlarged drawing in Figure 16.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Sling of suspension bridge connection structure in the present embodiment, the upper and lower tensioning of hoist cable is between cord clip and beam-ends, including cable body
1, the parallel wire unit 101 by twisting and the inner layer polyethylene sheath 102 and outer layer polyethylene sheath that are wrapped in outside steel tendon 101
103 are constituted.The zinc-containing alloy coating wire that steel tendon is selected from diameter 5mm-7mm reverses to be formed through 3-4 degree.The upper and lower side of cable body 1
Correspondence is anchored in anchor cup 2, and upper anchor cup is at the top of it, lower anchor cup in its bottom is respectively arranged with the hoist cable otic placode 3 with pin hole, is hung
Cringle plate 3 is ears otic placode.The hoist cable otic placode 3 on hoist cable top is rotatablely connected with the cord clip otic placode 4 with pin hole by pin shaft 5, is hung
The hoist cable otic placode 3 of rope bottom end is rotatablely connected with the beam-ends otic placode 6 with pin hole by pin shaft 5.Cord clip otic placode 4 and beam-ends otic placode 6 are
Monaural otic placode.Oscillating bearing 7 is respectively arranged at the pin hole cooperation of pin shaft 5 and beam-ends otic placode 6.Pin shaft 5 is matched with cord clip otic placode 4
Bushing 12, bushing 12 and 5 clearance fit of pin shaft, 4 secure fit of bushing 12 and cord clip otic placode are provided at conjunction.
One, oscillating bearing 7 is the permanent seal cooling big corner self-lubricating knuckle bearing with sealing structure.
When the steel box-girder of hoist cable is when along bridge to moving under direction across bridge load, self-lubricating knuckle bearing can meet rotation pendulum
Dynamic and wallowing motion or even the two compound oscillating eliminates the bending acted on hoist cable so that hoist cable be avoided to bend
The motion mode of stress, hoist cable and connector, referring to Fig. 6,7,8.
Oscillating bearing includes bearing inner race 701 and bearing outer ring 702, and bearing inner race 701 has spherical outside surface, bearing outer ring
702 have Internal Spherical Surface, and by taking beam-ends otic placode 6 as an example, bearing outer ring 702 is fixed in the pin hole of beam-ends otic placode 6, bearing inner race
701 are movably arranged in the ball of bearing outer ring 702 and internal and external spherical surfaces constitute movable sphere-contact, and bearing inner race 01 is arranged
The pin hole passed through for pin shaft 5.
(1) by increasing the width of bearing inner race and the outer diameter of bearing outer ring, the corner of bearing is improved, hoist cable is realized
Big corner.As shown in figure 11, the spherical outside surface arc length of bearing inner race is noticeably greater than the Internal Spherical Surface arc length of bearing outer ring, and Internal Spherical Surface
Central angle corresponding to the half of arc length difference beyond spherical outside surface is hard-over of the bearing inner race with respect to bearing outer ring deflection,
When the width of bearing inner race is bigger, then deflection angle is bigger.
(2) big corner is improved by the way that PTFE (polytetrafluoroethylene (PTFE)) fabric is arranged on the contact spherical surface of bearing internal external circle
The wear resistance of oscillating bearing, PTFE fiber fabric 8 are used as lubricant layer, and preferentially by PTFE fiber fabric
8 are arranged in the Internal Spherical Surface of fixed bearing outer ring 702, and control the beginning when spherical outside surface and Internal Spherical Surface relatively rotate of lubricant layer 8
It is not exposed eventually.
(3) be set for contact spherical surface the service life that sealing structure prevents foreign matter to invade bearing working surface and influences bearing.
Sealing structure is arranged at the both sides of the edge of bearing outer ring 702, is made of seal groove 10 and fixing ring 9, fixing ring 9
It is arranged in seal groove 10, the existing positioning function between bearing outer ring of the fixing ring 9 has and bearing inner race ectosphere again
Dynamic contact sealing function between face.
As shown in figure 13, along the exposed notch that is axially formed of bearing outer ring, fixing ring has to overflow seal groove 10
For the bevel edge lip of the notch, bevel edge lip has contact section, passes through the spherical outside surface of the contact section and bearing inner race 701
Fitting.The bevel edge lip and bearing inner race are interference fitted and realize the spherical outside surface for being adjacent to bearing inner race always.
The magnitude of interference of outermost bevel edge lip is maximum, and a groove is arranged on bevel edge lip, mainly increases the bullet of sealing lip
Property, the spherical surface of sealing ring assembly rear bearing also produces certain magnitude of interference, makes sealing ring sealed lip and oscillating bearing inner ring
Spherical outside surface is in contact, and realizes sealing.
The sealing structure is positioned using rib, which is arranged positioning rib 901 outstanding, seal groove notch edge
Bearing outer ring radially extend one step 11 of molding, positioning rib 901 and step 11 and contradicted in radial constitute of bearing outer ring.
Special fixture must be used when the assembly of sealing ring, and assembly method: oscillating bearing is lain on special fixture
→ being put into sealing ring → sealing ring, first prolonging a direction after position indentation sealing slot slot position → indentation from one is gently pressed into → two
After head is to connecting, raised position is pressed into → checks whether sealing ring is installed in place → rolling bearing inner ring observation using special tooling
Sealing ring and inner sleeve spherical surface laminating degree are installed when integrally being bonded not interspacing.
(4) inner ring and outer ring of oscillating bearing is all made of the stainless steel 40Cr13 or similar material of high rigidity and high-wearing feature
Material, guarantee oscillating bearing anti-corrosion life and the wear-resistant service life.
Two, bushing 12 is to improve the durability of the structure to make pin shaft 5 and the relative rotation of cord clip otic placode 4 freer.
The bushing 12 includes base steel backing 1201, and PTFE fiber fabric is provided in the inner hole of base steel backing 1201 as lubrication
Layer 1202, and the sealing structure for preventing foreign object intrusion lubricant layer is provided in the inner hole of base steel backing 1201.
1) base steel-PTFE (polytetrafluoroethylene (PTFE)) Fabric Bush under the conditions of oil-free lubrication, can bear the height of 250MPa
Load, -200 DEG C of operating temperature range~280 DEG C can bear vibratory shock load in vacuum environment or radiation area.
2) using being interference fitted, pin shaft is gap-matched with bushing for bushing and cord clip or girder steel otic placode inner hole.Assembly
There is certain magnitude of interference afterwards, between the two without relative motion between cord clip or girder steel lug plate holes and bushing.Pin shaft and lining
Set can relatively rotate, its wear-resistant service life can be improved.
3) surface smoothness of pin shaft needs Ra1.6 or more, the surface smoothness of base steel backing 1201 can reach Ra1.6 with
On.If axis or 1201 sets of surfaces of base steel backing are too coarse, abrasion between the two can be very serious and eventually leads to axis
It is greatly shortened with the service life of set.
4) bushing has sealing structure, and sealing structure includes seal groove and O-shaped poly- ammonia on 1201 inner hole of base steel backing
Ester sealing ring 1203 holds pin shaft tightly by O-shaped polyurethane sealing ring 1203.Sealing structure has at two, is located at base steel backing 1201
Two sides, to constitute both ends sealing to lubricant layer.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiments
The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.
Claims (16)
1. a kind of suspension bridge space big corner, permanent seal cooling hoist cable connection structure, tensioning is between cord clip and beam-ends up and down for hoist cable, packet
Include cable body, the upper and lower side of cable body is corresponding to be anchored in anchor cup, in lower anchor cup, and the upper anchor cup is at the top of it, the lower anchor cup exists
Its bottom is respectively arranged with the hoist cable otic placode with pin hole, and the hoist cable otic placode on hoist cable top and the cord clip otic placode with pin hole pass through pin shaft
Rotation connection, the hoist cable otic placode of hoist cable bottom end and the beam-ends otic placode with pin hole are rotatablely connected by pin shaft, which is characterized in that
Hoist cable bottom end: being provided with oscillating bearing at the pin hole cooperation of pin shaft and lower ear plate, which refers to the hoist cable ear of bottom end
One of plate and beam-ends otic placode, which, which meets hoist cable, to be deflected in the plane of non-perpendicular pin shaft；Hoist cable
Top: being provided with bushing at the pin hole cooperation of pin shaft and upper ear plate, upper ear plate refer to top hoist cable otic placode and cord clip otic placode its
One of, which is fixed on pin hole inner wall, and pin shaft and sleeve clearances cooperate.
2. suspension bridge space according to claim 1 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
Cable body is mainly by the parallel wire unit of twisting and the inner layer polyethylene sheath and outer layer polyethylene sheath that are wrapped in outside steel tendon.
3. suspension bridge space according to claim 1 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
Steel tendon is selected from the zinc-containing alloy coating wire of diameter 5mm-7mm.
4. suspension bridge space according to claim 1 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
Oscillating bearing includes bearing inner race and bearing outer ring, and bearing inner race has spherical outside surface, and bearing outer ring has Internal Spherical Surface, bearing outer ring
It is fixed in the pin hole of lower ear plate, bearing inner race is movably arranged in the ball of bearing outer ring and internal and external spherical surfaces are constituted and lived
Dynamic sphere-contact, the pin hole that bearing inner race setting is passed through for the pin shaft.
5. suspension bridge space according to claim 4 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: bearing
The spherical outside surface arc length of inner ring is noticeably greater than the Internal Spherical Surface arc length of bearing outer ring, and the half of arc length difference of the Internal Spherical Surface beyond spherical outside surface
Corresponding central angle is bearing inner race with respect to the hard-over that bearing outer ring deflects.
6. suspension bridge space according to claim 4 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: ectosphere
PTFE fiber fabric is set on the contact surface of face and Internal Spherical Surface as lubricant layer.
7. suspension bridge space according to claim 6 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
PTFE fiber fabric is arranged in the Internal Spherical Surface of bearing outer ring, and always not when spherical outside surface and Internal Spherical Surface relatively rotate
It is exposed.
8. suspension bridge space according to claim 4 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
Bearing outer ring or bearing inner race are provided with sealing structure at Internal Spherical Surface or spherical outside surface, and sealing structure composition prevents invasion from contacting
The sealing of spherical surface.
9. suspension bridge space according to claim 8 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
Sealing structure is arranged at the both sides of the edge of bearing outer ring, is made of seal groove and fixing ring, and fixing ring setting exists
In seal groove, the sealing effect of the fixing ring and the holding sliding contact of bearing inner race spherical outside surface.
10. suspension bridge space according to claim 9 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
Along the exposed notch that is axially formed of bearing outer ring, the fixing ring has to be overflowed in the bevel edge lip of the notch seal groove
Mouthful, the bevel edge lip and bearing inner race are interference fitted and realize the spherical outside surface for being adjacent to bearing inner race always.
11. suspension bridge space according to claim 10 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: institute
It states and offers groove or inner hole on bevel edge lip and make with elastic characteristic.
12. suspension bridge space according to claim 10 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: institute
Stating bevel edge lip has contact section, is bonded by the contact section with the spherical outside surface of bearing inner race.
13. suspension bridge space according to claim 10 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: institute
It states fixing ring and is provided with positioning rib outstanding, the notch has the step radially extended along bearing outer ring, described
Rib and step are contradicted in radial constitute of bearing outer ring.
14. suspension bridge space according to claim 1 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
The pin hole of bushing and otic placode is in radial interference fit so that bushing is clamped in pin hole.
15. suspension bridge space according to claim 1 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
Bushing includes annular backing, and the annular backing internal perisporium is provided with PTFE fiber fabric as lubricant layer, is through ring
Pin shaft and lubricant layer activity in shape backing inner hole cooperate.
16. suspension bridge space according to claim 1 big corner, permanent seal cooling hoist cable connection structure, it is characterised in that: described
Bushing has sealing structure, including the seal groove being arranged on annular backing inner hole and the O-shaped sealing being arranged in the seal groove
Circle, the O-ring seal act on the pin shaft being through in annular backing inner hole；Sealing structure, which has, is arranged position difference position at two
In annular backing two sides, end part seal is constituted to lubricant layer both ends respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910375014.4A CN110144822A (en) | 2019-05-07 | 2019-05-07 | Suspension bridge space big corner, permanent seal cooling hoist cable connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910375014.4A CN110144822A (en) | 2019-05-07 | 2019-05-07 | Suspension bridge space big corner, permanent seal cooling hoist cable connection structure |
Publications (1)
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| CN110144822A true CN110144822A (en) | 2019-08-20 |
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| CN201910375014.4A Pending CN110144822A (en) | 2019-05-07 | 2019-05-07 | Suspension bridge space big corner, permanent seal cooling hoist cable connection structure |
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| CN (1) | CN110144822A (en) |
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