Self-lubricating steel support

Abstract

The invention relates to a self-lubricating steel support, and belongs to the technical field of building and bridge supports. A self-lubricating steel support comprises an upper support plate, a middle lining plate and a lower support plate which are sequentially arranged from top to bottom. A first friction pair is arranged between the upper seat plate and the middle lining plate, and / or a second friction pair is arranged between the middle lining plate and the lower seat plate; the first friction pair comprises a first friction plate and a first self-lubricating layer arranged close to one side face of the first friction plate, and the second friction pair comprises a second friction plate and a second self-lubricating layer arranged close to one side face of the second friction plate. Each of the first self-lubricating layer and the second self-lubricating layer comprises a coating formed by mixing a high-molecular polymer, carbon fibers and a nano filler. And silicone grease and a mirror surface stainless steel plate can be omitted, the friction performance of the support is effectively improved, durability and stability are achieved, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of building and bridge bearings, and in particular to a self-lubricating steel bearing. Background Art

[0002] Steel bearings include spherical bearings, pot bearings, friction pendulum bearings, etc. They are commonly used building structural components and bridge components. They mainly play the role of vertical bearing, adapting to structural rotation and displacement. Friction pendulum bearings can also play the role of energy dissipation and shock absorption. There are two types of friction pairs involved in steel bearings, one is a plane sliding friction pair, and the other is a spherical rotating friction pair. Commonly used friction pairs are composed of polymer material plates and mirror stainless steel plates. In order to control the wear of polymer materials, an oil storage tank is usually set on the polymer plate, and the oil storage tank is filled with silicone grease to play the role of lubrication and reduce the wear of the polymer plate. However, the filled silicone grease will produce hydration in the natural environment, the friction coefficient between the friction pairs will gradually increase, the wear of the skateboard material will increase, and the rotation and displacement functions of the original bearing design will gradually be lost.

[0003] The traditional friction pair scheme has the following drawbacks and defects: spherical curvature deviation is easily generated during the arc forming and welding process of the mirror stainless steel plate, there is hollowness in the bearing, and the stainless steel is prone to wrinkling and shearing damage during the operation of the bearing; the silicone grease lubrication method cannot achieve long-term and lasting lubrication, and the friction pair quickly loses its function, resulting in the loss of the bearing's use function and affecting the bearing's life; some companies have developed silicone grease replenishment technology to make up for the loss of silicone grease, such as the Chinese patent application number 201520795626.6 discloses a curved steel bearing that can be replenished with lubricant, but it is relatively difficult to replenish silicone grease under normal operating conditions of the bearing, and the effect is not good. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the embodiments of the present application includes providing a self-lubricating steel support, which can eliminate the use of silicone grease and mirror stainless steel plates, and effectively improve the friction performance of the support to be durable and stable, and extend the service life.

[0005] In the first aspect, an embodiment of the present application provides a self-lubricating steel support, comprising an upper seat plate, an intermediate lining plate and a lower seat plate arranged in sequence from top to bottom; a first friction pair is arranged between the upper seat plate and the intermediate lining plate, and / or a second friction pair is arranged between the intermediate lining plate and the lower seat plate; the first friction pair comprises a first friction plate and a first self-lubricating layer arranged on a side close to the first friction plate, and the second friction pair comprises a second friction plate and a second self-lubricating layer arranged on a side close to the second friction plate; the first self-lubricating layer and the second self-lubricating layer both comprise a coating formed by a mixture of a high molecular polymer, carbon fiber and nanofiller.

[0006] The present application does not use silicone grease and stainless steel slide plates, but uses a first self-lubricating layer and / or a second self-lubricating layer. When the first friction pair and the second friction pair are in friction operation, the resin, nanoparticles, and metal oxides in the first self-lubricating layer and the second self-lubricating layer are more tightly combined under the action of temperature and pressure, thereby improving the density of the first self-lubricating layer and the second self-lubricating layer, and enhancing the pressure-bearing performance and wear resistance. At the same time, as the first friction pair and the second friction pair are in operation, the friction interface is driven by friction heat, causing the first self-lubricating layer and the second self-lubricating layer to transfer, and a friction film interface is formed between the first friction plate and the first self-lubricating layer and between the second friction plate and the second self-lubricating layer, thereby reducing the friction coefficient between the friction pairs and playing a self-lubricating role. In addition, the use of silicone grease and stainless steel slide plates can be eliminated, and the friction performance of the bearing can be effectively improved to be long-lasting and stable, and the service life can be extended.

[0007] In some embodiments of the present application, the high molecular polymer, carbon fiber and nano filler are mixed in a mass ratio of 4-6:1-2:2-3.

[0008] The present application mixes high molecular polymer, carbon fiber and nano filler in an appropriate mass ratio to form a first self-lubricating layer and a second self-lubricating layer, which can form a first self-lubricating layer and a second self-lubricating layer that are dense, have high pressure-bearing performance and wear-resistant performance, and are conducive to achieving self-lubricating effect.

[0009] In some embodiments of the present application, the high molecular polymer includes at least one of polyamide fiber resin, polyethylene terephthalate, polycarbonate, polyoxymethylene, polytetrafluoroethylene, polyetheretherketone, and ultra-high molecular weight polyethylene.

[0010] The present application adopts the above-mentioned high molecular polymer with the advantages of high strength, good ductility, strong barrier properties, etc., and applies it to the first self-lubricating layer and the second self-lubricating layer, which can improve the corrosion resistance, wear resistance and impact resistance of the first friction pair and the second friction pair, and at the same time facilitate the realization of self-lubricating effect.

[0011] In some embodiments of the present application, the nanofiller includes at least one of carbon nanotubes and graphene.

[0012] The present application adopts the above-mentioned nano filler to form a first self-lubricating layer and a second self-lubricating layer that are dense, have high pressure-bearing performance and wear-resistant performance, and are conducive to achieving self-lubricating effect.

[0013] In some embodiments of the present application, the first self-lubricating layer and the second self-lubricating layer further include a solid lubricant, an adhesive and a curing agent.

[0014] The present application also uses solid lubricants, adhesives and curing agents as functional fillers in the first self-lubricating layer and the second self-lubricating layer to facilitate the formation of stable and smooth first self-lubricating layer and second self-lubricating layer.

[0015] In some embodiments of the present application, the thickness of the first self-lubricating layer and the second self-lubricating layer is unit displacement wear thickness×maximum design displacement.

[0016] The present application designs the maximum displacement of the friction pair and then tests the wear thickness per unit displacement, thereby setting the required thicknesses of the first self-lubricating layer and the second self-lubricating layer to meet the designed maximum displacement of the friction pair.

[0017] In some embodiments of the present application, the materials of the upper seat plate, the middle lining plate, and the lower seat plate all include weathering steel.

[0018] In this application, the upper seat plate, the middle lining plate and the lower seat plate are preferably made of weather-resistant steel, which can improve the anti-corrosion performance of the steel support substrate and greatly improve the durability of the steel support.

[0019] In some embodiments of the present application, the outer surfaces of the upper seat plate, the middle lining plate, and the lower seat plate are all provided with an anti-corrosion layer; the anti-corrosion layer includes a cold-dip galvanized layer and a zinc-aluminum alloy layer arranged in sequence from the inside to the outside.

[0020] The present application further provides an anti-corrosion layer on the outer surfaces of the upper seat plate, the middle lining plate and the lower seat plate, which can protect the upper seat plate, the middle lining plate and the lower seat plate, and further improve the anti-corrosion performance of the upper seat plate, the middle lining plate and the lower seat plate; at the same time, the cold-dip galvanized layer has excellent corrosion resistance, and the zinc-aluminum alloy layer seals and protects the cold-dip galvanized layer, thereby achieving excellent corrosion resistance.

[0021] In some embodiments of the present application, the thickness of the cold-dip galvanized layer is 100-150 μm.

[0022] The present application can further protect the upper seat plate, the middle lining plate and the lower seat plate efficiently by setting a cold-dip galvanizing layer of appropriate thickness, thereby further improving the anti-corrosion performance of the upper seat plate, the middle lining plate and the lower seat plate.

[0023] In some embodiments of the present application, the thickness of the zinc-aluminum alloy layer is 30-50 μm.

[0024] The present application can provide efficient sealing protection for the cold-dip galvanized layer by setting a zinc-aluminum alloy layer of appropriate thickness, thereby avoiding peeling and damage of the zinc-aluminum alloy layer after a long period of time, thereby ensuring excellent anti-corrosion performance for a long time.

[0025] In some embodiments of the present application, the materials of the first friction plate and the second friction plate both include polytetrafluoroethylene, ultra-high molecular weight polyethylene or polyoxymethylene.

[0026] In some embodiments of the present application, the first friction plate and the second friction plate are both made of ultra-high molecular weight polyethylene.

[0027] The first friction plate and the second friction plate of the present application are preferably made of ultra-high molecular weight polyethylene, which has high pressure-bearing strength, low wear, and excellent anti-aging performance, and can assist in improving the bearing strength of the steel support and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the self-lubricating spherical steel bearing provided in Example 1 of the present application.

[0030] Figure 2 This is a schematic structural diagram of the self-lubricating friction pendulum seismic isolation steel support provided in Example 2 of the present application.

[0031] Figure 3 This is a schematic structural diagram of the self-lubricating basin-type steel support provided in Example 3 of the present application.

[0032] Figure 4 This is a schematic structural diagram of the self-lubricating planar sliding steel support provided in Example 4 of the present application.

[0033] Figure 5 This is a result diagram provided for Experimental Example 1 of this application.

[0034] Icons: 1-upper seat plate; 11-first self-lubricating layer; 2-first friction pair; 21-first friction plate; 3-middle lining plate; 31-second self-lubricating layer; 32-spherical crown; 33-piston; 34-rubber plate; 35-slide plate; 4-second friction pair; 41-second friction plate; 5-lower seat plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0036] This application proposes a self-lubricating steel support, such as Figure 1As shown, it includes an upper seat plate 1, an intermediate lining plate 3 and a lower seat plate 5 which are arranged in sequence from top to bottom; a first friction pair 2 is arranged between the upper seat plate 1 and the intermediate lining plate 3, and / or a second friction pair 4 is arranged between the intermediate lining plate 3 and the lower seat plate 5; the first friction pair 2 includes a first friction plate 21 and a first self-lubricating layer 11 arranged on a side close to the first friction plate 21, and the second friction pair 4 includes a second friction plate 41 and a second self-lubricating layer 31 arranged on a side close to the second friction plate 41; the first self-lubricating layer 11 and the second self-lubricating layer 31 both include a coating formed by a mixture of a high molecular polymer, carbon fiber and nanofiller.

[0037] The present application does not use silicone grease and stainless steel slide plates, but uses a first self-lubricating layer 11 and / or a second self-lubricating layer 31. The first friction pair 2 and the second friction pair 4 produce plane sliding, spherical rotation, and spherical swing under the action of external loads to form the pressure, speed, and temperature conditions of the first friction pair 2 and the second friction pair 4. At the initial stage of the operation of the first friction pair 2 and the second friction pair 4, the friction coefficient of the first friction pair 2 and the second friction pair 4 is relatively larger than the friction coefficient of the later stage; the first self-lubricating layer 11 and the second self-lubricating layer 31 undergo friction sintering under the action of operating conditions such as pressure, speed, and temperature, and the resin, nanoparticles, and metal oxides in the first self-lubricating layer 11 and the second self-lubricating layer 31 are more combined under the action of temperature and pressure. The first self-lubricating layer 11 and the second self-lubricating layer 31 are tightly packed, and the compactness of the first self-lubricating layer 11 and the second self-lubricating layer 31 is improved, and the pressure-bearing performance and wear resistance are enhanced; with the operation of the first friction pair 2 and / or the second friction pair 4, the friction interface is driven by the friction heat, so that the microscopic particles of the materials in the first self-lubricating layer 11 and the second self-lubricating layer 31 fall off and transfer, and then combine with the grinding medium under the action of temperature, and a physical and chemical reaction occurs, and a layer of microscopic friction film interface is formed between the first friction plate 21 and the first self-lubricating layer 11 and between the second friction plate 41 and the second self-lubricating layer 31, which reduces the friction coefficient between the friction pairs and plays a self-lubricating role. In addition, the use of silicone grease and stainless steel slide plates can be eliminated, which can effectively improve the durable stability of the bearing friction performance and extend the service life.

[0038] The use of silicone grease has been eliminated, avoiding changes in bearing performance due to changes in silicone grease reserves; at the same time, the engineering costs incurred by replenishing silicone grease later are avoided; and after the stainless steel slide plate is worn, the original oil storage tank will also be damaged. Even if the silicone grease can be replenished, without the oil storage tank, the silicone grease that enters the bearing will soon be squeezed out again under the action of external force, and the wear of the stainless steel slide plate will become greater and greater.

[0039] When the stainless steel slide plate is pressed into an arc, the curvature is difficult to control and it is easy to deviate from the curvature of the support base; when the stainless steel slide plate is welded to the support base, the welding stress will cause the stainless steel to shrink, and the curvature of the base will deviate again; the stainless steel slide plate in the friction pair is eliminated, which avoids the problem of fitting between the stainless steel slide plate and the support body and prevents hollowing; it avoids wear, wrinkling, hollowing and other phenomena on the stainless steel slide plate after long-term operation of the support, and avoids punching damage to the stainless steel slide plate.

[0040] In some embodiments of the present application, the self-lubricating steel bearing may be a spherical bearing, or a friction pendulum isolation bearing, a pot bearing, or a plane sliding bearing. Bearings of other structures may also be used. As an example, when the self-lubricating steel bearing is a spherical bearing or a friction pendulum isolation bearing, the middle lining 3 is a ball crown 32. When the self-lubricating steel bearing is a pot bearing, the middle lining 3 is a piston 33 and a rubber plate 34 stacked up and down. When the self-lubricating steel bearing is a plane sliding bearing, the middle lining 3 is a slide plate 35.

[0041] In some embodiments of the present application, the first self-lubricating layer 11 is sprayed on a side of the upper seat plate 1 close to the first friction plate 21, and the second self-lubricating layer 31 is sprayed on the bottom surface of the middle lining plate 3 or the lower seat plate close to the second friction plate 41; the first self-lubricating layer 11 and the second self-lubricating layer 31 are both cured at 200-300°C after spraying.

[0042] In some embodiments of the present application, the polymer, carbon fiber and nanofiller are mixed in a mass ratio of 4-6: 1-2: 2-3. The polymer, carbon fiber and nanofiller are mixed in a suitable mass ratio to form the first self-lubricating layer 11 and the second self-lubricating layer 31, which can form a dense first self-lubricating layer 11 and a second self-lubricating layer 31 with high pressure-bearing performance and wear resistance, and at the same time facilitate the realization of self-lubricating effect.

[0043] In some embodiments of the present application, the high molecular polymer includes at least one of polyamide fiber resin, polyethylene terephthalate, polycarbonate, polyoxymethylene, polytetrafluoroethylene, polyetheretherketone, and ultra-high molecular weight polyethylene. The high molecular polymer has the advantages of high strength, good ductility, strong barrier properties, etc., and is applied to the first self-lubricating layer 11 and the second self-lubricating layer 31, which can improve the corrosion resistance, wear resistance and impact resistance of the first friction pair 2 and the second friction pair 4, and is conducive to achieving self-lubricating effect.

[0044] In some embodiments of the present application, the nanofiller includes at least one of carbon nanotubes and graphene. The above nanofiller can significantly improve the mechanical properties of the material such as tensile strength, toughness, impact resistance, and bonding performance, reduce the viscosity of the material, improve fluidity, improve processing performance, improve the gloss and transparency of the material, and improve the surface smoothness and wear resistance of the product; in combination with high molecular polymers and carbon fibers, the carbon fibers can enhance the mechanical properties of the material, improve the corrosion resistance and high temperature resistance of the material; thus, the first self-lubricating layer 11 and the second self-lubricating layer 31 can be formed in combination, which are dense, have high pressure bearing performance and wear resistance, and are conducive to achieving self-lubricating effect.

[0045] In some embodiments of the present application, the first self-lubricating layer 11 and the second self-lubricating layer 31 further include a solid lubricant, an adhesive and a curing agent. Solid lubricants, adhesives and curing agents are also used as functional fillers in the first self-lubricating layer 11 and the second self-lubricating layer 31 to facilitate the formation of stable and smooth first self-lubricating layers 11 and second self-lubricating layers 31.

[0046] In some embodiments of the present application, the thickness of the first self-lubricating layer 11 and the second self-lubricating layer 31 is the unit displacement wear thickness × the maximum designed displacement. By designing the maximum displacement of the friction pair and then testing the unit displacement wear thickness, the required thickness of the first self-lubricating layer 11 and the second self-lubricating layer 31 is set to meet the designed maximum displacement of the friction pair.

[0047] In some embodiments of the present application, the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 are preferably made of weathering steel. The upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 are all made of weathering steel, which can improve the anti-corrosion performance of the steel support substrate and greatly improve the durability of the steel support. The upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 can also be made of other materials with anti-corrosion performance.

[0048] In some embodiments of the present application, the outer surfaces of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 are all provided with an anti-corrosion layer; the anti-corrosion layer includes a cold-dip galvanized layer and a zinc-aluminum alloy layer arranged in sequence from the inside to the outside. Further, an anti-corrosion layer is arranged on the outer surfaces of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5, which can protect the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5, and further improve the anti-corrosion performance of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5; at the same time, the cold-dip galvanized layer has excellent anti-corrosion properties, and the zinc-aluminum alloy layer seals and protects the cold-dip galvanized layer, thereby achieving excellent anti-corrosion performance. Moreover, for bridge bearings with a service life of 100 years, operation and maintenance work is carried out in the 30th, 60th, and 90th years, respectively, and the original coating can be directly re-coated, and the cold-dip galvanized layer has a good re-melting property with the old coating.

[0049] In some embodiments of the present application, the thickness of the cold-dip galvanized layer is 100-150 μm. As an example, the thickness of the cold-dip galvanized layer can be, but is not limited to, 100 μm, 105 μm, 110 μm, 115 μm, 120 μm, 125 μm, 130 μm, 135 μm, 140 μm, 145 μm, 150 μm. Providing a cold-dip galvanized layer of appropriate thickness can further protect the upper seat plate 1, the middle lining plate 3 and the lower seat plate 5 efficiently, and further improve the anti-corrosion performance of the upper seat plate 1, the middle lining plate 3 and the lower seat plate 5.

[0050] In some embodiments of the present application, the thickness of the zinc-aluminum alloy layer is 30-50 μm. As an example, 30 μm, 35 μm, 40 μm, 45 μm, and 50 μm are used. Providing a zinc-aluminum alloy layer of appropriate thickness can effectively seal and protect the cold-dip galvanized layer, avoiding peeling and damage of the zinc-aluminum alloy layer after a long time, thereby ensuring excellent anti-corrosion performance for a long time.

[0051] In some embodiments of the present application, the roughness of the outer surfaces of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 before the anti-corrosion layer is provided is not greater than Sa 2.5. As an example, the roughness of the outer surfaces of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 before the anti-corrosion layer is provided is Sa 2.5. As an example, the outer surfaces of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 before the anti-corrosion layer is provided can be sandblasted and cleaned so that the outer surfaces of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 before the anti-corrosion layer is provided reach the required roughness. The outer surfaces of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5 before the anti-corrosion layer is provided have an appropriate roughness grade, which is conducive to the first self-lubricating layer 11, the second self-lubricating layer 31, and the anti-corrosion layer being firmly provided on the surfaces of the upper seat plate 1, the middle lining plate 3, and the lower seat plate 5.

[0052] In some embodiments of the present application, the material of the first friction plate 21 and the second friction plate 41 is preferably ultra-high molecular weight polyethylene. The first friction plate 21 and the second friction plate 41 are both made of ultra-high molecular weight polyethylene, which has high pressure bearing strength, low wear, and excellent anti-aging performance, and can help improve the bearing strength of the steel support and extend the service life. The material of the first friction plate 21 and the second friction plate 41 can also be polytetrafluoroethylene or polyoxymethylene.

[0053] Example 1

[0054] This embodiment provides a self-lubricating spherical steel support, such as Figure 1As shown, it includes an upper seat plate 1, a first friction pair 2, a spherical crown 32, a second friction pair 4 and a lower seat plate 5 which are arranged in sequence from top to bottom; the first friction pair 2 includes a first friction plate 21 and a first self-lubricating layer 11, the first friction plate 21 is embedded and fixed on the top surface of the spherical crown 32, and the first self-lubricating layer 11 is arranged on a side of the upper seat plate 1 close to the first friction plate 21; the second friction pair 4 includes a second friction plate 41 and a second self-lubricating layer 31, the second friction plate 41 is embedded and fixed on the top surface of the lower seat plate 5, and the second self-lubricating layer 31 is arranged on the bottom surface of the spherical crown 32 close to the second friction plate 41; the first self-lubricating layer 11 and the second self-lubricating layer 31 both include a coating formed by mixing polyamide fiber resin, carbon fiber and graphene, solid lubricant, adhesive and curing agent in a mass ratio of 5:1:2:1:1:1.

[0055] The upper seat plate 1, ball crown 32, and lower seat plate 5 are all made of weathering steel, and the performance of weathering steel meets the requirements of "Weathering Steel for Highway Bridges" T / CHTS20013-2021. Designed for a 100-year service life, the maximum design displacement is ±200mm, and the thickness of the first self-lubricating layer 11 and the second self-lubricating layer 31 is designed to be 90μm. The first friction plate 21 and the second friction plate 41 are both made of ultra-high molecular weight polyethylene.

[0056] Example 2

[0057] This embodiment provides a self-lubricating friction pendulum isolation steel support, such as Figure 2 As shown, it includes an upper seat plate 1, a first friction pair 2, a spherical crown 32, a second friction pair 4 and a lower seat plate 5 which are arranged in sequence from top to bottom; the first friction pair 2 includes a first friction plate 21 and a first self-lubricating layer 11, the first friction plate 21 is embedded and fixed on the top surface of the spherical crown 32, and the first self-lubricating layer 11 is arranged on a side of the upper seat plate 1 close to the first friction plate 21; the second friction pair 4 includes a second friction plate 41 and a second self-lubricating layer 31, the second friction plate 41 is embedded and fixed on the bottom surface of the spherical crown 32, and the second self-lubricating layer 31 is arranged on the top surface of the lower seat plate 5 close to the second friction plate 41; the first self-lubricating layer 11 and the second self-lubricating layer 31 both include a coating formed by mixing polyamide fiber resin, carbon fiber and graphene, solid lubricant, adhesive and curing agent in a mass ratio of 5:1:2:1:1:1.

[0058] The upper seat plate 1, ball crown 32, and lower seat plate 5 are all made of weathering steel, and the performance of weathering steel meets the requirements of "Weathering Steel for Highway Bridges" T / CHTS20013-2021. Designed for a 100-year service life, the maximum design displacement is ±200mm, and the thickness of the first self-lubricating layer 11 and the second self-lubricating layer 31 is designed to be 90μm. The first friction plate 21 and the second friction plate 41 are both made of ultra-high molecular weight polyethylene.

[0059] Example 3

[0060] This embodiment provides a self-lubricating basin-type steel support, such as Figure 3 As shown, it includes an upper seat plate 1, a first friction pair 2, a piston 33, a rubber plate 34 and a lower seat plate 5 which are arranged in sequence from top to bottom; the first friction pair 2 includes a first friction plate 21 and a first self-lubricating layer 11, the first friction plate 21 is embedded and fixed on the top surface of the piston 33, and the first self-lubricating layer 11 is arranged on a side of the upper seat plate 1 close to the first friction plate 21; the first self-lubricating layer 11 includes a coating formed by mixing polyamide fiber resin, carbon fiber and graphene, solid lubricant, adhesive and curing agent in a mass ratio of 5:1:2:1:1:1.

[0061] The upper seat plate 1 and the lower seat plate 5 are both made of weathering steel, and the performance of weathering steel meets the requirements of "Weathering Steel for Highway Bridges" T / CHTS20013-2021. Designed for a 100-year service life, the maximum design displacement is ±200mm, and the thickness of the first self-lubricating layer 11 is designed to be 90μm. The first friction plate 21 is made of ultra-high molecular weight polyethylene.

[0062] Example 4

[0063] This embodiment provides a self-lubricating flat sliding steel support, such as Figure 4 As shown, it includes an upper seat plate 1, a slide plate 35, a second friction pair 4 and a lower seat plate 5 which are arranged in sequence from top to bottom; the second friction pair 4 includes a second friction plate 41 and a second self-lubricating layer 31, the second friction plate 41 is embedded and fixed on the bottom surface of the slide plate 35, and the second self-lubricating layer 31 is arranged on the top surface of the lower seat plate 5 close to the second friction plate 41; the second self-lubricating layer 31 includes a coating formed by mixing polyamide fiber resin, carbon fiber and graphene, solid lubricant, adhesive and curing agent in a mass ratio of 5:1:2:1:1:1.

[0064] The upper seat plate 1, the sliding plate 35, and the lower seat plate 5 are all made of weathering steel, and the performance of weathering steel meets the requirements of "Weathering Steel for Highway Bridges" T / CHTS20013-2021. Designed for a 100-year service life, the maximum design displacement is ±200mm under extreme conditions, and the thickness of the second self-lubricating layer 31 is designed to be 90μm. The second friction plate 41 is made of ultra-high molecular weight polyethylene.

[0065] Test Example 1

[0066] In this test example, the self-lubricating spherical steel bearing provided in Example 1 was subjected to a 15KM tribological test, with a designed compressive stress of 45MPa and a running speed of 100mm / s. The results are as follows: Figure 5 shown.

[0067] Depend on Figure 5 The results show that the average friction coefficient per kilometer of the self-lubricating steel bearing provided by the present application is less than 0.03; the friction coefficient is slightly larger at the beginning of operation. As the friction pair operates, the polymer nano self-lubricating coating material is transferred under the drive of the friction heat of the friction interface, and a friction film interface is formed between the friction material of the friction pair and the polymer nano coating. After the friction film interface is formed, the self-lubricating effect is obvious, and the friction coefficient of the interface of the friction pair becomes relatively stable. It is explained that the self-lubricating steel bearing provided by the present application eliminates the use of silicone grease and stainless steel slide plates, and adopts the first self-lubricating layer and the second self-lubricating layer, which can achieve self-lubricating effect and reach the friction coefficient required by the standard.

[0068] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

Claims

1. A self-lubricating steel support, characterized in that: The invention comprises an upper seat plate, an intermediate lining plate and a lower seat plate which are arranged in sequence from top to bottom; a first friction pair is arranged between the upper seat plate and the intermediate lining plate, and / or a second friction pair is arranged between the intermediate lining plate and the lower seat plate; The first friction pair comprises a first friction plate and a first self-lubricating layer disposed near a side surface of the first friction plate, and the second friction pair comprises a second friction plate and a second self-lubricating layer disposed near a side surface of the second friction plate; The first self-lubricating layer and the second self-lubricating layer both include coatings formed by mixing high molecular polymer, carbon fiber and nano filler.

2. The self-lubricating steel support according to claim 1, characterized in that: The high molecular polymer, the carbon fiber and the nano filler are mixed in a mass ratio of 4-6:1-2:2-3.

3. The self-lubricating steel support according to claim 2, characterized in that: The high molecular polymer includes at least one of polyamide fiber resin, polyethylene terephthalate, polycarbonate, polyoxymethylene, polytetrafluoroethylene, polyetheretherketone, and ultra-high molecular weight polyethylene.

4. The self-lubricating steel support according to claim 2, characterized in that: The nano filler includes at least one of carbon nano tubes and graphene.

5. The self-lubricating steel support according to claim 3, characterized in that: The first self-lubricating layer and the second self-lubricating layer further include a solid lubricant, an adhesive and a curing agent.

6. The self-lubricating steel support according to claim 5, characterized in that: The thickness of the first self-lubricating layer and the second self-lubricating layer is unit displacement wear thickness×maximum design displacement.

7. The self-lubricating steel support according to claim 1, characterized in that: The upper seat plate, the middle lining plate and the lower seat plate are all made of weathering steel.

8. The self-lubricating steel support according to claim 7, characterized in that: The outer surfaces of the upper seat plate, the middle lining plate and the lower seat plate are all provided with an anti-corrosion layer; the anti-corrosion layer includes a cold-dip galvanized layer and a zinc-aluminum alloy layer which are sequentially provided from the inside to the outside.

9. The self-lubricating steel support according to claim 8, characterized in that: The thickness of the cold-dip galvanized layer is 100-150 μm; And / or, the zinc-aluminum alloy layer has a thickness of 30-50 μm.

10. The self-lubricating steel support according to claim 1, characterized in that: The materials of the first friction plate and the second friction plate both include polytetrafluoroethylene, ultra-high molecular weight polyethylene or polyoxymethylene; Optionally, the first friction plate and the second friction plate are made of ultra-high molecular weight polyethylene.

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