Bridge engineering damping sliding block made of oil-containing polymer composite material

Abstract

The utility model provides a bridge engineering shock absorption slider made of an oil-containing polymer composite material, which comprises an upper support plate and a lower support plate, a stainless steel plate, a sliding plate, a middle plate and a support plate are sequentially arranged between the upper support plate and the lower support plate from top to bottom, the sliding plate is made of the oil-containing polymer composite material, and the middle plate is made of the oil-containing polymer composite material. According to the oil-containing polymer composite material, grease can be extruded in a motion state to form a lubricating layer through a special formula and process design, so that the friction coefficient is reduced; when the sliding block stops moving, grease is adsorbed and stored in the micropore structure to realize cyclic utilization, so that the sliding plate always keeps good lubricating performance in the whole service cycle, the problem of sliding plate failure caused by easy evaporation loss of lubricating grease in a traditional lithium-based grease lubricating mode is effectively avoided, the reliability of the damping sliding block is improved, and the service life of the damping sliding block is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of vibration damping sliders, specifically a vibration damping slider for bridge engineering made of oil-containing polymer composite material. Background Technology

[0002] In bridge structures, bridge bearings are crucial components connecting the bridge to the piers. They not only need to bear the weight of the bridge but also accommodate displacements caused by factors such as temperature, wind loads, and earthquakes. Traditional bridge bearing slides are mostly lubricated with silicone grease. Over time, this silicone grease gradually depletes, especially in harsh environments such as earthquake-prone areas or cross-sea bridges, where depletion is accelerated. When the silicone grease is depleted, the coefficient of friction increases, potentially leading to increased bearing friction resistance, accelerated wear on the slide surface, reduced shock absorption, and decreased overall bearing flexibility. This ultimately negatively impacts the bridge's seismic safety and economic efficiency. Even with regular inspection and grease replenishment, this not only increases maintenance workload and the frequency and cost of slide replacement but also causes environmental pollution due to lost grease and makes maintenance difficult due to overhead work.

[0003] Meanwhile, with social development, higher standards have been set for railway and highway construction. Friction pendulum seismic isolation bearings are required for use in earthquake-prone areas and harsh environments such as cross-sea bridges. The design of friction pendulum seismic isolation bearings requires the sliding plate to operate without silicone grease, and the coefficient of friction must be controlled within a certain range. Therefore, developing a new type of bridge bearing sliding plate that can provide long-lasting lubrication and is heat and cold resistant is particularly important. Utility Model Content

[0004] The purpose of this invention is to provide a bridge engineering vibration damping slider made of oil-containing polymer composite material, so as to solve the problems of easy failure, high maintenance cost and environmental unfriendliness of lithium-based grease lubricated sliders in the prior art, and to achieve long-lasting and stable lubrication and efficient vibration damping of the vibration damping slider in bridge engineering.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bridge engineering vibration damping sliding plate bearing made of oil-containing polymer composite material includes an upper support plate and a lower support plate. A stainless steel plate, a sliding plate, an intermediate plate, and a support plate are sequentially arranged between the upper and lower support plates from top to bottom. The sliding plate is made of oil-containing polymer composite material. Through a special formula and process design, this oil-containing polymer composite material can extrude grease to form a lubricating layer during operation, reducing the coefficient of friction. When the movement stops, the grease is adsorbed and stored in a microporous structure, achieving recycling. This ensures that the sliding plate maintains good lubrication performance throughout its service life, effectively avoiding the problem of grease evaporation and loss leading to sliding plate failure in traditional lithium-based grease lubrication methods, and improving the reliability and service life of the vibration damping slider.

[0007] More preferably, the skateboard is a flat board or a spherical board;

[0008] Further preferably, the planar sliding plate is made of an oil-containing polymer composite material;

[0009] Further preferably, the spherical sliding plate is made of an oil-containing polymer composite material.

[0010] More preferably, the support plate is made of an oil-containing polymer composite material, or an oil-containing polymer composite material as the base layer followed by a composite elastic rubber layer.

[0011] Further preferably, the middle steel plate is provided with a side slide plate, which is made of an oil-containing polymer composite material. The side slide plate is fixed to the upper support plate. The middle steel plate, the lower support plate, and the lower end of the upper support plate are respectively provided with a first sealing structure to enhance the stability and sealing of the structure and prevent dust, moisture and other impurities from intruding and affecting the lubrication and shock absorption performance of the slide plate.

[0012] The preparation method of the oil-containing polymer composite material includes the following steps:

[0013] Premix preparation: Dry UPE resin is premixed with KH-550 treated short-cut carbon fibers, nano-silica, and molybdenum disulfide. This mixture is then low-temperature permeation-mixed with a lubricating grease synthesized at 60°C to form a paste. The proportions of each raw material are precisely calculated and optimized to ensure that the material possesses high strength while also exhibiting good lubrication properties and oil absorption and storage capacity.

[0014] Material loading: A chrome-plated steel mold is used and sprayed with PTFE release agent. After preheating at 80℃, it is pre-pressed at 5MPa to remove air bubbles, ensuring that the premixed material is evenly filled and initially formed in the mold, laying a good foundation for the subsequent hot pressing process.

[0015] Hot pressing: This process is carried out in three steps. First, the temperature is raised to 180℃ and pressure is increased to 15MPa. The temperature is maintained for 15 minutes to melt the matrix and fully integrate the components. Then, the temperature is raised to 200℃ and pressure is increased to 25MPa. The pressure is maintained for 20 minutes to complete plasticization and fiber orientation, enhancing the anisotropy of the material's mechanical and lubrication properties. Finally, the material is slowly cooled to 100℃ for demolding. The cooling rate is controlled to be ≤ 2℃ / min to avoid internal stress and uneven material properties caused by rapid cooling, ensuring the stability of the material's microstructure and properties.

[0016] Post-treatment: The surface lubricating layer is cured by heat treatment at 100℃ for 4 hours, further improving the lubrication and wear resistance of the material surface, enabling it to better adapt to the complex stress and environmental conditions in bridge engineering. The core advantage of the molding process lies in reducing the damage to the grease molecular chains caused by high-temperature shearing. Static pressure avoids phase separation due to high grease content. Especially in cases containing a large amount of fiber and grease, molding can better control the flow and distribution of the material, avoiding grease migration or fiber breakage that may occur during injection molding.

[0017] Compared with the prior art, the oil-containing polymer composite material shock-absorbing slider of this utility model has the following significant advantages and inventive features:

[0018] Long-lasting and stable lubrication performance: The use of oil-containing polymer composite material replaces the traditional engineering plastic slide and silicone grease lubrication. The micropore and microchannel structure inside the material can store a large amount of grease and realize the automatic extrusion and adsorption storage recycling of grease in both moving and stationary states. This completely solves the problem of easy evaporation and loss of lubricating grease in the existing technology, which leads to lubrication failure. It ensures that the slide maintains a low coefficient of friction throughout its service life, effectively reduces wear, and improves the reliability and durability of the shock-absorbing slider.

[0019] Excellent mechanical properties: Through material composites, surface functionalization, and special molding processes, oil-containing polymer composite materials achieve a significant improvement in lubrication performance without significantly sacrificing strength. The material not only possesses sufficient strength to bear the weight of the bridge and cope with complex stress environments, but also exhibits good wear resistance and impact resistance, enabling it to adapt to displacement and vibration caused by factors such as temperature, wind load, and earthquakes, providing stable damping support for the bridge structure.

[0020] Excellent environmental adaptability: This oil-containing polymer composite material has excellent heat and cold resistance and can maintain stable performance under harsh environmental conditions, such as high temperature, low temperature, humidity, and salt spray. It is particularly suitable for bridge engineering in special environments such as earthquake-prone areas and cross-sea bridges, effectively avoiding the impact of environmental factors on the lubrication and shock absorption performance of the sliding plate and reducing the risk of corrosion and damage to bridge bearings.

[0021] Maintenance-free and environmentally friendly: Due to the material's inherent long-lasting lubrication properties, there is no need for regular inspection and grease replenishment, achieving maintenance-free operation of the shock-absorbing slider. This greatly reduces maintenance workload and costs, while also avoiding environmental pollution caused by grease loss, meeting the requirements of modern bridge engineering construction for environmental protection and sustainable development. Attached Figure Description

[0022] Figure 1 , Figure 2 , Figure 3 These are schematic diagrams of different embodiments of the present invention. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and relevant knowledge. Obviously, the described applications are only some embodiments of the present invention, and not all embodiments.

[0024] Example 1, referring to Figure 1, describes a bridge engineering vibration damping slider made of an oil-containing polymer composite material, manufactured through a molding process. This molding process has unique advantages: it effectively reduces the damage to the grease molecular chains caused by high-temperature shearing; through static pressure, it avoids phase separation in high-grease-content systems; especially when the material contains a large amount of fiber and grease, it can precisely control the flow and distribution of the material during the molding process, effectively avoiding common problems in injection molding such as grease migration and fiber breakage. The blank sheet material obtained by the molding process will then be precision machined according to the bridge sliding plate design requirements to produce the required flat and spherical sliding plates. These sliding plates are made of an oil-containing polymer composite material, which, after being molded and cured, forms the required structural dimensions, possessing not only high strength but also excellent lubrication performance. During the movement of the slider, the grease inside the material is squeezed out to form a lubricating layer, effectively reducing friction; and when the slider stops moving, the grease is stored in the microporous structure of the material, achieving recycling. Sufficient oil content ensures continuous and stable lubrication, significantly reduces the coefficient of friction, and significantly improves the wear resistance of materials. At the same time, it can adapt to complex and changing environmental conditions, effectively reduce the vibration and noise generated by the bridge structure during operation, thereby greatly extending the service life of the product and providing a reliable guarantee for the safe and stable operation of bridge projects.

[0025] Example 2, referring to Figure 2, describes a bridge engineering vibration damping slider made of oil-impregnated polymer composite material. It includes an upper support plate 2 and a lower support plate 1. Between the upper support plate 2 and the lower support plate 1, from top to bottom, are arranged a stainless steel plate 6, a flat sliding plate 5, an intermediate plate 3, and a support plate 4. The intermediate plate 3 is a central spherical plate, the flat sliding plate 5 is made of oil-impregnated nylon, and the support plate 4 is a spherical sliding plate, also made of oil-impregnated nylon. It also includes sealing rubber 11 located between the intermediate plate 3 and the upper support plate 2 for sealing and vibration damping, as well as upper mounting bolts 12 on the upper support plate 2 and lower mounting bolts 13 on the lower support plate 1. The upper mounting bolts 12 and lower mounting bolts 13 facilitate the installation of the bridge engineering vibration damping slider.

[0026] In this embodiment, both the planar and spherical sliding plates are made of oil-impregnated nylon. This material is molded and cured to the required structural dimensions, ensuring both high strength and unique self-lubricating properties. During movement, the grease inside the material is automatically squeezed out to form a lubricating layer; when stationary, the grease is absorbed and stored by the microporous structure, enabling recycling. Sufficient oil content allows the material to significantly reduce the coefficient of friction and enhance wear resistance. Even under complex environmental changes, it maintains excellent lubrication, effectively reducing vibration and noise generated during bridge operation, and significantly improving the overall performance and service life of the shock-absorbing slider.

[0027] Example 3, referring to Figure 3 As shown, a bridge engineering vibration damping sliding plate bearing made of oil-containing polymer composite material includes an upper support plate 2 and a lower support plate 1. From top to bottom, a stainless steel plate 6, a flat sliding plate 5, an intermediate plate 3, and a support plate 4 are arranged between the upper support plate 2 and the lower support plate 1. The support plate 4 is a rubber plate, which can play a role in vibration damping. The intermediate plate 3 is an intermediate steel plate. A side sliding plate 7 is provided on the side of the intermediate steel plate to prevent side slippage. The side sliding plate is made of oil-containing polymer composite material. A lateral stainless steel plate 8 is provided on the outside of the side sliding plate. The lateral stainless steel plate 8 is fixed to the upper support plate. A first sealing structure 9 is provided on the side of the intermediate steel plate and the lower support plate and the lower end of the upper support plate, respectively.

[0028] This embodiment replaces both the planar sliding plate 5 and the side sliding plate 7 with an oil-containing polymer composite material. Through a mold-molding curing process, the required structural dimensions can be precisely shaped. This material, with its high strength and unique oil-containing properties, can actively extrude grease to form a lubricating layer during movement, reducing friction between components; when stationary, it can utilize its internal microporous structure to properly store the grease. Sufficient oil content ensures continuous and stable lubrication, significantly reducing the coefficient of friction and greatly improving the material's wear resistance. It can also effectively suppress vibration and noise in various complex environments, providing reliable shock absorption protection for bridge engineering.

[0029] Although some embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, and all such changes and alterations should fall within the scope of the present invention.

Claims

1. A bridge engineering vibration damping slider made of oil-containing polymer composite material, characterized in that, It includes an upper support plate and a lower support plate. From top to bottom, a stainless steel plate, a sliding plate, an intermediate plate, and a support plate are arranged between the upper support plate and the lower support plate. The sliding plate is made of oil-containing polymer composite material, which can squeeze out grease to form a lubricating layer during movement, reduce the coefficient of friction, and absorb and store the grease in the microporous structure when the movement stops, so as to realize recycling.

2. The bridge engineering vibration damping slider made of oil-containing polymer composite material according to claim 1, characterized in that, The skateboard can be a flat board or a spherical board.

3. The bridge engineering vibration damping slider made of oil-containing polymer composite material according to claim 1, characterized in that, The support plate is made of oil-containing polymer composite material, or it is made of oil-containing polymer composite material as the base layer and then composited with an elastic rubber layer.

4. The bridge engineering vibration damping slider made of oil-containing polymer composite material according to claim 1, characterized in that, The middle plate is provided with a side slide plate, which is made of oil-containing polymer composite material. The side slide plate is fixed to the upper support plate. The middle plate, the lower support plate and the lower end of the upper support plate are respectively provided with a first sealing structure to enhance the stability and sealing of the structure and prevent dust, moisture and impurities from entering and affecting the lubrication and shock absorption performance of the slide plate.

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