High-durability steel support

Abstract

The utility model discloses a high-durability steel support which comprises an upper support plate, a lower support plate, a rotating force transmission piece and a deformation sliding assembly. The rotating force transmission piece is arranged between the upper seat plate and the lower seat plate; the steel support is a spherical support, and a first boss with a spherical groove is arranged in the middle of the upper end of the lower support plate. The rotating force transmission piece comprises a spherical crown lining plate, the upper end of the spherical crown lining plate is a plane, and the bottom end is a spherical surface and matched with the spherical surface at the upper end of the lower seat plate. Paired and symmetrical first baffles are arranged at the bottom end of the upper seat plate; the rotary force transmission piece further comprises a hoop ring, and the hoop ring comprises a circular ring in the middle and guide blocks which are the same as the first baffles in number and symmetrically arranged on the outer side of the circular ring. The deformation sliding assembly further comprises a third friction pair arranged between the outer side of the first boss and the inner side of the circular ring. By arranging the hoop ring structure, universal rotation and horizontal force transmission of the support are achieved, displacement deviation and non-uniform rotation in use can be effectively adapted, and the support is prevented from being stuck.

Description

Technical Field

[0001] This utility model belongs to the field of bridge bearing technology, and more specifically, relates to a high-durability steel bearing. Background Technology

[0002] As a key load-bearing structure in transportation networks, the mechanical performance and service reliability of bridges directly determine the operational safety of the road network system. As the core force-transmitting component of the bridge structural system, the bearings are located between the beam and the pier, undertaking the core functions of releasing displacement constraints and transmitting multi-directional loads. Their mechanical properties directly affect the stability and durability of the bridge structure under complex working conditions such as temperature deformation and vehicle dynamic loads.

[0003] In existing technologies, bridge bearings are primarily made of steel, and they mainly employ two typical structural forms: Spherical bearings achieve rotation through the arcuate fit between a spherical crown and a lower bearing plate, and adapt to horizontal displacement by the relative sliding between a sliding plate on the spherical crown liner and the stainless steel mirror surface of the upper bearing plate. This design offers advantages such as a clear force transmission path, uniform rotational performance in all directions, high load-bearing capacity, and strong adaptability to horizontal displacement, making it particularly suitable for the design of long-span bridges. On the other hand, pot bearings utilize the fluid properties of rubber under triaxial stress to achieve rotation, and adjust horizontal displacement through the relative sliding between a polytetrafluoroethylene plate on the intermediate support steel plate and the stainless steel mirror surface of the upper bearing plate. This design also possesses high load-bearing capacity and excellent displacement adaptability, making it suitable for various large-scale bridge projects.

[0004] However, existing bridge bearing technologies suffer from the following technical defects in practical use: For spherical and pot bearings, the friction pair (i.e., the sliding plate and the stainless steel mirror surface) generally suffers from premature wear. Furthermore, traditional sliding plate materials have poor resistance to dry friction, typically requiring oil reservoirs on the sliding plate surface filled with silicone grease to reduce the coefficient of friction. However, silicone grease is prone to hydrolysis under natural environmental conditions, and its effective lubrication life is usually only 3-5 years. After lubrication failure, dry friction occurs between the sliding plate and the stainless steel mirror surface, leading to a significant increase in the coefficient of friction, thereby accelerating the wear process of the sliding plate and severely affecting the service life and durability of the bearing. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a high-durability steel support. It incorporates a guide structure and multiple friction pair structures. The friction pair structure utilizes a sliding plate made from a modified polytetrafluoroethylene (PTFE) body. Furthermore, a multi-layered high-strength fiber mesh providing skeletal support is incorporated within the PTFE body, with wear-resistant admixtures filling the spaces between the layers. This effectively improves the support's service life and durability. Additionally, the deformable sliding assembly significantly enhances the support's vibration damping performance.

[0006] To achieve the above objectives, this utility model provides a high-durability steel support, comprising: an upper support plate, a lower support plate, a rotational force transmission component, and a deformation sliding assembly, wherein:

[0007] The rotational force transmission component is disposed between the upper seat plate and the lower seat plate;

[0008] The deformation sliding assembly includes a first friction pair, which is respectively disposed at the bottom end of the upper seat plate and the upper end of the rotational force transmission component;

[0009] Meanwhile, the friction pair structure includes an ultra-high performance polytetrafluoroethylene sliding plate made of modified polytetrafluoroethylene body, and the polytetrafluoroethylene body has a multi-layer high-strength fiber mesh inside which provides a skeleton support, and the interlayer high-strength fiber mesh is filled with a wear-resistant admixture.

[0010] Furthermore, the high-strength fiber web has a regular hexagonal mesh structure;

[0011] The distance between two adjacent layers of the high-strength fiber mesh is 0.15 to 0.2 times the design thickness of the skateboard.

[0012] The high-strength fiber mesh is evenly spaced horizontally or vertically inside the polytetrafluoroethylene body.

[0013] Furthermore, in the friction pair, the dry grinding distance between the sliding plate and the stainless steel mirror surface is greater than or equal to 50 km and the linear wear rate is less than 30 μm / km.

[0014] Furthermore, the admixture is uniformly distributed inside the modified polytetrafluoroethylene body, and the high-strength fiber web is evenly spaced inside the modified polytetrafluoroethylene body, making the bond between the modified polytetrafluoroethylene body and the admixture tighter.

[0015] Furthermore, the steel support includes a spherical support, which further includes a second friction pair. The second friction pair is respectively disposed on the upper end of the lower seat plate and the bottom end of the rotational force transmission member. The upper end of the lower seat plate is provided with a first boss in the middle, and the upper end of the first boss is provided with a spherical groove in the middle. The rotational force transmission member includes a spherical crown liner, which is flat at the upper end and spherical at the bottom end, and is adapted to the spherical surface at the upper end of the lower seat plate. The first friction pair includes a first sliding plate disposed on the upper end of the spherical crown liner and a first stainless steel mirror surface disposed on the bottom end of the upper seat plate. The second friction pair includes a second sliding plate disposed on the upper end of the lower seat plate and a second stainless steel mirror surface disposed on the bottom end of the spherical crown liner, and both the second sliding plate and the second stainless steel mirror surface are adapted to the spherical surface at the bottom end of the spherical crown liner.

[0016] Furthermore, the bottom end of the upper seat plate is provided with a pair of symmetrical first baffles;

[0017] The steel support also includes a first guide assembly, which includes a first SF-1 plate disposed on one side of the first boss and a first stainless steel plate disposed inside the first baffle, and the number of the first guide assemblies is the same as the number of the first baffles.

[0018] Furthermore, the rotational force transmission component also includes a collar ring, which includes a central ring and guide blocks that are the same number as the first baffle and symmetrically arranged on the outer side of the ring; the deformation sliding assembly also includes a third friction pair, which includes an annular third sliding plate arranged on the outer side of the first boss and an annular third stainless steel mirror surface arranged on the inner side of the ring.

[0019] Furthermore, the steel support includes a pot-type rubber support, wherein the lower seat plate includes a second boss with a cylindrical mounting hole in the center; the rotational force transmission component includes a central steel liner, one end of which falls into the mounting hole of the second boss; the deformation sliding assembly includes a fourth friction pair and a rubber pad; the fourth friction pair includes a fourth sliding plate disposed at the upper end of the central steel liner and a fourth stainless steel mirror surface disposed at the bottom end of the upper seat plate; the rubber pad is disposed in the mounting hole of the second boss, with its two ends respectively connected to the upper end of the second boss and the bottom end of the central steel liner; the rubber pad is made of a high-durability composite rubber material.

[0020] Furthermore, the high-durability composite rubber material is prepared by mixing natural rubber and EPDM rubber.

[0021] Furthermore, the bottom end of the upper seat plate is provided with a pair of symmetrical second baffles;

[0022] The steel support also includes a second guide assembly, which includes a second SF-1 plate disposed on the outside of the central steel liner and a second stainless steel plate disposed on the inside of the second baffle. The number of the second guide assemblies is the same as the number of the second baffles.

[0023] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0024] (1) The steel support of this utility model is provided with a guide structure and multiple friction pair structures. At the same time, the friction pair structure is made of ultra-high performance polytetrafluoroethylene sliding plate made of modified polytetrafluoroethylene body. In addition, a multi-layer high-strength fiber mesh is provided inside the polytetrafluoroethylene body to play a supporting role. The wear-resistant admixture is filled between the multi-layer high-strength fiber mesh, thereby effectively improving the service life and durability of the support. Furthermore, the shock absorption performance of the support is significantly improved by the deformation sliding component.

[0025] (2) The steel support of this utility model can form a planar fit and a corresponding annular fit by detachably sleeved on the outside of the first boss of the lower seat plate. This allows the sleeve to rotate in all directions without constraint. At the same time, the sleeve can directly bear the horizontal force transmitted from the upper seat plate by cooperating with the first baffle of the upper seat plate. It can also adapt to the displacement deviation of the upper seat plate during construction and installation and the uneven rotation of the upper seat plate, thus avoiding the local stress situation of traditional supports and the jamming problem caused by obstruction of slippage.

[0026] (3) The steel support of this utility model has four guide blocks evenly distributed on the outer side of the ring, so that the steel support can be adapted to different usage scenarios by replacing the sleeve ring, thereby significantly improving the practicality of the steel support.

[0027] (4) The steel support of this utility model transmits vertical load through the central steel liner to ensure the uniformity of load distribution. At the same time, the bridge structure rotation function is realized through multiple friction pairs and rubber pads, so that the bridge has good seismic performance. Furthermore, the durability of the steel support is effectively improved by the sliding plate and the high-durability composite rubber material, reducing the later maintenance cost. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of the steel support of Embodiment 1 of this utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the skateboard according to an embodiment of the present utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the high-strength fiber mesh according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the steel support structure in Embodiment 2 of this utility model;

[0032] Figure 5 This is a schematic diagram of the assembly of the lower seat plate and the sleeve ring in Embodiment 2 of this utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the hoop ring with four guide blocks in Embodiment 2 of this utility model;

[0034] Figure 7 This is a cross-sectional view of the steel support of Embodiment 3 of this utility model.

[0035] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-upper seat plate, 11-first baffle, 12-second baffle, 2-lower seat plate, 21-first boss, 22-second boss, 3-rotational force transmission component, 31-spherical crown liner, 32-hoop ring, 321-circular ring, 322-guide block, 33-central steel liner, 4-deformation sliding assembly, 41-first friction pair, 411-first sliding plate, 412-first stainless steel mirror surface, 42-first guide assembly, 421-first S... F-1 plate, 422-first stainless steel plate, 43-second friction pair, 431-second sliding plate, 432-second stainless steel mirror finish, 44-third friction pair, 441-third sliding plate, 442-third stainless steel mirror finish, 45-fourth friction pair, 451-fourth sliding plate, 452-fourth stainless steel mirror finish, 46-second guide assembly, 461-second SF-1 plate, 462-second stainless steel plate, 47-rubber pad, 4a-modified polytetrafluoroethylene body, 4b-high-strength fiber mesh, 4c-admixture. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0037] Example 1

[0038] like Figures 1 to 3As shown, an embodiment of this utility model provides a high-durability steel support, comprising: an upper support plate 1, a lower support plate 2, a rotational force transmission component 3, and a deformation sliding assembly 4; the rotational force transmission component 3 is disposed between the upper support plate 1 and the lower support plate 2; the deformation sliding assembly 4 includes a first friction pair 41, which is respectively disposed at the bottom end of the upper support plate 1 and the upper end of the rotational force transmission component 3; simultaneously, the friction pair structure includes an ultra-high performance polytetrafluoroethylene sliding plate made of modified polytetrafluoroethylene body 4a, and the polytetrafluoroethylene body 4a is provided with a multi-layer high-strength fiber mesh 4b that serves as a skeleton support, and the spaces between the multi-layer high-strength fiber mesh 4b are filled with a wear-resistant admixture 4c, thereby effectively improving the service life and durability of the support, and significantly improving the shock absorption performance of the support through the deformation sliding assembly.

[0039] Specifically, such as Figure 1 As shown, the steel support also includes a spherical support, which further includes a second friction pair 43. The second friction pair 43 is respectively disposed at the upper end of the lower seat plate 2 and the bottom end of the rotational force transmission member 3. The lower seat plate 2 has a first boss 21 at the middle of its upper end, and a spherical groove at the middle of its upper end. The rotational force transmission member 3 includes a spherical crown liner 31, which has a flat upper end and a spherical bottom end, and is adapted to the spherical surface at the upper end of the lower seat plate 2. The first friction pair 41 includes a first sliding plate 411 disposed at the upper end of the spherical crown liner 31 and a first stainless steel mirror surface 412 disposed at the bottom end of the upper seat plate 1. The second friction pair 43 includes a second sliding plate 431 disposed at the upper end of the lower seat plate and a second stainless steel mirror surface 432 disposed at the bottom end of the spherical crown liner 31, and both the second sliding plate 431 and the second stainless steel mirror surface 432 are adapted to the spherical surface at the bottom end of the spherical crown liner 31.

[0040] Furthermore, both the first slide plate 411 and the second slide plate 431 are made of modified polytetrafluoroethylene body 4a, and the polytetrafluoroethylene body 4a is provided with a multi-layer high-strength fiber mesh 4b that serves as a skeleton support, and the spaces between the multi-layer high-strength fiber mesh 4b are filled with a wear-resistant admixture 4c.

[0041] Preferably, the high-strength fiber mesh 4b has a regular hexagonal mesh structure.

[0042] Preferably, the distance between two adjacent layers of the high-strength fiber mesh 4b is 0.15 to 0.2 times the design thickness of the skateboard.

[0043] Preferably, the high-strength fiber mesh 4b is evenly spaced in the transverse or longitudinal direction inside the polytetrafluoroethylene body.

[0044] Preferably, the dry grinding distance between the sliding plate and the stainless steel mirror surface in the friction pair is greater than or equal to 50km and the linear wear rate is less than 30μm / km.

[0045] Preferably, the admixture 4c is uniformly distributed inside the modified polytetrafluoroethylene body 4a, and the high-strength fiber web 4b is evenly spaced inside the modified polytetrafluoroethylene body 4a, so that the modified polytetrafluoroethylene body 4a and the admixture 4c are more tightly bonded.

[0046] It should be noted that polyoxymethylene and polyether ether ketone blends 4c are evenly distributed inside the modified polytetrafluoroethylene body 4a, and the high-strength fiber mesh 4b, which plays a supporting role, is evenly spaced inside the modified polytetrafluoroethylene body 4a, making the bond between the modified polytetrafluoroethylene body 4a and the polyoxymethylene and polyether ether ketone blends 4c tighter.

[0047] The high-strength fiber mesh 4b is a carbon fiber or PE fiber material with a regular hexagonal mesh structure, and its interlayer distance is maintained in the range of 0.15h to 0.2h, where h is the design thickness of the slide plate.

[0048] Carbon fiber has a diameter of 5–18 μm, a tensile strength of 2500–3500 MPa, an elastic modulus of 350–800 GPa, and an elongation of 0.4%–1.8%; while PE fiber has a tensile strength of 2400–3500 MPa, an elastic modulus of 80–116 GPa, and an elongation of 3.0%–3.8%.

[0049] The skateboard manufacturing process is as follows: First, multiple layers of high-strength fiber mesh 4b are arranged in the molding groove, and a compound layer of modified polytetrafluoroethylene, polyoxymethylene, and polyetheretherketone with uniform thickness is arranged between each layer of fiber mesh. Then, a blank board with a thickness of 8mm is made under high temperature and high pressure. Finally, the surface of the molded blank board is finely polished to form the finished product.

[0050] Polyoxymethylene (POM) and polyetheretherketone (PEEK) blends are special polymer materials with a molecular weight greater than 5 million. They possess high-temperature resistance (melting point 334℃, softening point 168℃), good mechanical properties (tensile strength 130-150 MPa), low coefficient of friction, wear-resistant self-lubricating properties, and excellent corrosion resistance; they are insoluble in strong acids and alkalis and resistant to hydrolysis.

[0051] The slide plate has the following characteristics: ① Stable and wide-range adjustable coefficient of friction (static friction coefficient 0.03~0.07, dynamic friction coefficient 0.02~0.06), which can be finely designed according to engineering requirements; ② Elastic modulus of 1500MPa (1±15%), which improves the working performance of the wear-resistant plate in low-temperature environment; ③ High design strength and good wear resistance, with a dry grinding distance of more than 50km with stainless steel mirror surface and a linear wear rate of less than 30μm / km; ④ Excellent resistance to rapid wear, with good surface wear resistance when the slide plate is dry-grinding at a speed greater than 400mm / s with stainless steel mirror surface or hard chrome plated surface.

[0052] Furthermore, the bottom end of the upper seat plate 1 is provided with a pair of symmetrical first baffles 11; the steel support also includes a first guide assembly 42, which includes a first SF-1 plate 421 disposed on one side of the first boss 21 and a first stainless steel plate 422 disposed inside the first baffle 11, and the number of the first guide assemblies 42 is the same as the number of the first baffles 11. It can be understood that when there are two of each of the first baffles 11 and the first guide assembly 42, the steel support is a unidirectional movable support and can slide freely in a single direction, which is usually the longitudinal movement of the bridge, thereby accommodating the longitudinal expansion and contraction of the bridge; when there are four of each of the first baffles 11 and the first guide assembly 42, that is, four first baffles 11 are respectively disposed on the four sides of the bottom end of the upper seat plate 1, the steel support can be a fixed support, thereby constraining the horizontal displacement of the support in all directions and bearing vertical loads and horizontal loads in all directions.

[0053] In an optional embodiment, the bottom end of the upper seat plate 1 is not provided with the first baffle 11, and when no guide component is provided, the steel support can be a bidirectional movable support, so that it can slide freely in two directions (longitudinal and transverse) in the horizontal plane, so as to be suitable for complex structures such as curved bridges and skew bridges.

[0054] It should be noted that the first SF-1 plate 421 is made of SF-1 material, which is a three-layer composite material, including: a base layer of steel plate to provide mechanical strength; a middle layer of sintered spherical bronze powder or porous copper powder to transfer heat and improve the bonding strength between the plastic layer and the matrix; and a surface layer rolled from a mixture of polytetrafluoroethylene (PTFE) and lead, which has excellent wear resistance and lubrication properties.

[0055] Example 2

[0056] like Figures 4 to 6As shown, based on Embodiment 1, the rotational force transmission component in Embodiment 2 of this utility model further includes a collar ring 32, which includes a central ring 321 and guide blocks 322 that are the same number as the first baffle 11 and symmetrically arranged on the outer side of the ring 321; the deformation sliding assembly 4 further includes a third friction pair 44, which includes an annular third sliding plate 441 arranged on the outer side of the first boss 21 and an annular third stainless steel mirror surface 442 arranged on the inner side of the ring 321. During use, when the steel support is a unidirectional movable support, by detachably sleeved the collar 32 on the outside of the first boss 21 of the lower seat plate 2, a planar fit and a corresponding annular fit can be formed, allowing the collar 32 to rotate in all directions without constraint. At the same time, by cooperating with the first baffle 11 of the upper seat plate 1, the collar 32 can directly bear the horizontal force transmitted from the upper seat plate 1, and adapt to the displacement deviation and uneven rotation of the upper seat plate 1 during construction and installation, avoiding the local stress situation of traditional supports and the jamming problem caused by obstruction of slippage.

[0057] In an optional embodiment, when the steel support is a fixed support, there are four guide blocks 322 evenly distributed on the outer side of the ring 321, so that the steel support can be adapted to different usage scenarios by replacing the sleeve ring 32, thereby significantly improving the practicality of the steel support.

[0058] Furthermore, the third slide plate 441 is made of modified polytetrafluoroethylene body 4a, and the polytetrafluoroethylene body 4a is provided with a multi-layer high-strength fiber mesh 4b that serves as a skeleton support, and the multi-layer high-strength fiber mesh 4b is filled with a wear-resistant admixture 4c.

[0059] Other technical features are the same as in Embodiment 1 and can achieve the same technical effects, so they will not be described in detail here.

[0060] Example 3

[0061] like Figure 7As shown, based on Embodiment 1, in Embodiment 3 of this utility model, the steel support further includes a pot-type rubber support. The lower seat plate 2 includes a second boss 22 with a cylindrical mounting hole in the center. The rotational force transmission component 3 includes a central steel liner 33, one end of which falls into the mounting hole of the second boss 22. The deformation sliding assembly 4 includes a fourth friction pair 45 and a rubber pad 47. The fourth friction pair 45 includes a fourth sliding plate 451 located at the upper end of the central steel liner 33 and a fourth stainless steel mirror surface 452 located at the bottom end of the upper seat plate 1. The rubber pad 47 is located in the mounting hole of the second boss 22, with its two ends connected to the upper end of the second boss 22 and the bottom end of the central steel liner 33, respectively. The rubber pad 47 is made of a high-durability composite rubber material. During use, the vertical load is transferred through the central steel lining plate 33 to ensure the uniformity of load distribution. At the same time, the rotation function of the bridge structure is realized through multiple friction pair structures and rubber pads 47, giving the bridge good seismic performance. Furthermore, the durability of the steel bearing is effectively improved by the sliding plate and the high-durability composite rubber material, reducing the later maintenance cost.

[0062] Furthermore, the fourth slide plate 451 is made of modified polytetrafluoroethylene body 4a, and the polytetrafluoroethylene body 4a is provided with a multi-layer high-strength fiber mesh 4b that serves as a skeleton support, and the multi-layer high-strength fiber mesh 4b is filled with a wear-resistant admixture 4c.

[0063] It should be noted that the high-durability composite rubber material of the rubber pad 47 is prepared by compounding natural rubber and EPDM rubber. Natural rubber has good processing properties, high tensile strength (up to 17.5 MPa), elongation at break (up to 450%), and high-temperature stability, but poor ozone aging resistance. EPDM rubber, on the other hand, is a copolymer of ethylene, propylene, and a small amount of non-conjugated diene; it is a type of ethylene-propylene rubber. Its main chain consists of chemically stable saturated hydrocarbons, with unsaturated double bonds only in the side chains. Therefore, it has excellent ozone resistance, heat resistance, weather resistance, and other aging resistance properties. The main purpose of using natural rubber and EPDM rubber together is to improve the ozone resistance and weather aging resistance of natural rubber.

[0064] The preparation process of the high-durability composite rubber material used in the rubber pad 47 is as follows: Prepared natural rubber and EPDM rubber are fed into different internal mixers. Additives such as compounding agents, antioxidants, carbon black, accelerators, and activators are added sequentially according to the formula to obtain pre-mixed natural rubber masterbatch and EPDM rubber masterbatch. Then, the two masterbatches are fed into a two-roll mill, where the rubber compound is repeatedly rolled and the roll gap and speed are adjusted to achieve the required thickness and width. Based on the design dimensions and shape of the rubber pad 47, a suitable mold is selected, and the refined rubber compound is pressed into a rubber sheet of a certain thickness using an extruder or flat vulcanizing machine. This rubber sheet can then be used for the subsequent preparation of the rubber pad.

[0065] The high-durability composite rubber material used in the rubber pad 47 has the following properties: ① Ozone aging resistance: After a tensile strength of 20%, an ozone concentration of 200 pphm, and a test temperature of 40℃ for 384 hours, no cracks were observed on the sample surface; ② Hot air aging resistance: After 70℃ for 1008 hours, the hardness changed from 0 to +10, the maximum change rate of tensile strength was -15%, and the maximum change rate of elongation at break was -20%. Compared with natural rubber and chloroprene rubber, this high-durability composite rubber material has better compressive elastic modulus, shear elastic modulus, and ozone aging resistance.

[0066] Furthermore, the bottom end of the upper seat plate 1 is provided with a pair of symmetrical second baffles 12; the steel support also includes a second guide assembly 46, which includes a second SF-1 plate 461 disposed on the outside of the middle steel liner 33 and a second stainless steel plate 462 disposed on the inside of the second baffle 12, and the number of the second guide assemblies 46 is the same as the number of the second baffles 12. It can be understood that when there are two of each of the second baffles 12 and the second guide assembly 46, the steel support is a unidirectional movable support and can slide freely in one direction, which is usually the longitudinal movement of the bridge, so as to accommodate the longitudinal expansion and contraction of the bridge; when there are four of each of the second baffles 12 and the second guide assembly 46, that is, four second baffles 12 are respectively disposed on the four sides of the bottom end of the upper seat plate 1, the steel support can be a fixed support, thereby constraining the horizontal displacement of the support in all directions and bearing vertical loads and horizontal loads in all directions.

[0067] In an optional embodiment, the bottom end of the upper seat plate 1 is not provided with the second baffle 12, and when no guide component is provided, the steel support can be a bidirectional movable support, so that it can slide freely in two directions (longitudinal and transverse) in the horizontal plane, so as to be suitable for complex structures such as curved bridges and skew bridges.

[0068] It should be noted that the second SF-1 plate 461 is made of SF-1 material, which is a three-layer composite material, including: a base layer of steel plate to provide mechanical strength; an intermediate layer of sintered spherical bronze powder or porous copper powder to transfer heat and improve the bonding strength between the plastic layer and the matrix; and a surface layer rolled from a mixture of polytetrafluoroethylene (PTFE) and lead, which has excellent wear resistance and lubrication properties.

[0069] Other technical features are the same as in Embodiment 1 and can achieve the same technical effects, so they will not be described in detail here.

[0070] The working principle of this utility model is as follows: The deformable sliding component 4 is installed at suitable positions on the upper bearing plate 1, the lower bearing plate 2, and the rotational force transmission component 3. After pre-assembly to ensure normal operation, the upper bearing plate 1 and the lower bearing plate 2 are connected to the bridge superstructure and the piers of the bridge substructure, respectively. Through reasonable structural design and the application of high-performance materials, the bearing achieves efficient vertical load transfer, horizontal displacement and rotational adaptability, as well as significant vibration reduction performance. It solves the problems of easy wear and short service life of traditional bearings and is suitable for engineering needs of long-span bridges, curved bridges, and high-intensity earthquake zones.

[0071] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0072] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0073] In this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, and not to limit it; those skilled in the art will readily understand that the above description is only a preferred embodiment of this utility model, and is not intended to limit this utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-durability steel support, comprising: The structure comprises an upper seat plate (1), a lower seat plate (2), a rotational force transmission component (3), and a deformation sliding assembly (4), wherein: the rotational force transmission component (3) is disposed between the upper seat plate (1) and the lower seat plate (2); the deformation sliding assembly (4) includes a first friction pair (41), which is respectively disposed at the bottom end of the upper seat plate (1) and the upper end of the rotational force transmission component (3); characterized in that the steel support is a spherical support, and further includes a second friction pair (43), which is respectively disposed at the upper end of the lower seat plate (2) and the bottom end of the rotational force transmission component (3), and a first boss (21) is provided at the middle of the upper end of the lower seat plate (2), and the middle of the upper end of the first boss (21) is provided with... Spherical groove; the rotational force transmission component (3) includes a spherical crown liner (31), the upper end of which is a plane and the lower end is a spherical surface, and it is adapted to the upper spherical surface of the lower seat plate (2); the first friction pair (41) includes a first sliding plate (411) disposed on the upper end of the spherical crown liner (31) and a first stainless steel mirror surface (412) disposed on the lower end of the upper seat plate (1); the second friction pair (43) includes a second sliding plate (431) disposed on the upper end of the lower seat plate and a second stainless steel mirror surface (432) disposed on the lower end of the spherical crown liner (31), and the second sliding plate (431) and the second stainless steel mirror surface (432) are both adapted to the lower spherical surface of the spherical crown liner (31); The bottom end of the upper seat plate (1) is provided with a pair of symmetrical first baffles (11). The rotational force transmission component (3) further includes a collar ring (32), which includes a central ring (321) and guide blocks (322) that are the same number as the first baffle (11) and symmetrically arranged on the outside of the ring (321); the deformation sliding component (4) further includes a third friction pair (44), which includes an annular third sliding plate (441) arranged on the outside of the first boss (21) and an annular third stainless steel mirror (442) arranged on the inside of the ring (321).

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