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Seismic absorption and isolation support with variable friction coefficient

A technology of friction coefficient and vibration reduction and isolation, which is applied in the field of variable friction coefficient vibration reduction and isolation bearings, can solve the problems of high friction coefficient of bearings, achieve excellent bearing capacity, good compatibility, and improve the effect of limit PV value

Active Publication Date: 2017-05-10
LUOYANG SUNRUI SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to meet the design requirements of shock-absorbing and isolating bearings, the general practice is to increase the friction coefficient so that the bearing has a stronger energy dissipation capacity under earthquakes. The support is used under dry friction. The above method can effectively improve the energy dissipation capacity of the shock-absorbing support under earthquakes, but it will also cause the friction coefficient of the support to be high during daily rotation and sliding.

Method used

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  • Seismic absorption and isolation support with variable friction coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a variable friction coefficient shock-absorbing and isolating bearing of the present invention, the sliding friction pair 1 adopts a speed-dependent friction material as the core sliding part.

[0025] The composition and mass percentage of the friction material are: polytetrafluoroethylene 60%, composite wear-resistant filler 30%, friction coefficient modifier 10%, wherein the composite wear-resistant filler accounted for the mass percentage of the total friction material is composed of: polyphenylene ester 25%, nano silicon dioxide 2%, molybdenum disulfide 3%. Firstly, polyphenylene, nano silicon dioxide and molybdenum disulfide were weighed according to the mass ratio, mixed and dried at 300°C for 1.5h. Weigh the components of polytetrafluoroethylene, composite wear-resistant filler and friction coefficient modifier according to the proportion, put them into a high-speed mixer and mix them evenly; after sieving, pour them into a mold for m...

Embodiment 2

[0028] Such as figure 1 As shown, a variable friction coefficient shock-absorbing and isolating bearing of the present invention, the sliding friction pair 1 adopts a speed-dependent friction material.

[0029] The composition and mass percentage of the friction material are 88% polytetrafluoroethylene, 10% composite wear-resistant filler, and 2% friction coefficient modifier. The composition of the composite wear-resistant filler is: polyether ether ketone 9%, graphite 1% . First, weigh polyether ether ketone and graphite according to the mass ratio, mix them and dry them at 250° C. for 2.5 hours. Weigh the components of polytetrafluoroethylene, composite wear-resistant filler and friction coefficient modifier according to the proportion, put them into a high-speed mixer and mix them evenly; after sieving, pour them into a mold for molding at a pressure of 45MPa, keep the pressure for 1min, and release the mold The blank was obtained; after the blank was parked at room temp...

Embodiment 3

[0032] Such as figure 1 As shown, a variable friction coefficient shock-absorbing and isolating bearing of the present invention, the sliding friction pair 1 adopts a speed-dependent friction material.

[0033] The composition and mass percentage of the friction material are: ultra-high molecular weight polyethylene 75%, composite wear-resistant filler 20%, friction coefficient modifier 5%, wherein the composite wear-resistant filler is composed of: polyphenylene ester 15%, nano-alumina 3%, molybdenum disulfide 1.5%. Firstly, polyphenylene, nano-alumina, and molybdenum disulfide were weighed according to the mass ratio, mixed and dried at 330° C. for 2 hours. Weigh the components of ultra-high molecular weight polyethylene, composite wear-resistant filler and friction coefficient modifier according to the proportion, put them into a high-speed mixer and mix them evenly; after sieving, pour them into a mold for molding at a pressure of 20MPa and a molding temperature of 220°C....

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Abstract

The invention provides a seismic absorption and isolation support with a variable friction coefficient to balance the contradiction between the daily function and the energy consumption capacity due to the friction coefficient of the seismic absorption and isolation support. When the speed is lower than or equal to 15 mm / s, the friction coefficient of the support is smaller than or equal to 0.02; when the speed is higher than or equal to 100 mm / s, the friction coefficient of the support is larger than or equal to 0.05.

Description

technical field [0001] The invention relates to the technical field of bridge supports, in particular to a shock-absorbing and isolating support with a variable friction coefficient. Background technique [0002] In the case of the same earthquake displacement, the friction coefficient represents the energy dissipation capacity of the bridge’s seismic isolation bearing. The larger the friction coefficient, the stronger the energy dissipation capacity. Therefore, the control of the friction coefficient is very important for the seismic isolation effect. [0003] The friction coefficient of the bridge shock-isolation bearing is determined by the friction material. Commonly used friction materials in the prior art include polytetrafluoroethylene and modified ultra-high molecular weight polyethylene, both of which have good friction properties, and the friction coefficient is low, not exceeding 0.03. flexible. However, in order to meet the design requirements of shock-absorbin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L67/04C08L61/16C08L23/06C08L83/04C08K3/36C08K3/30C08K3/04C08K3/22
CPCC08K2201/011C08L23/06C08L27/18C08L2205/03C08L2207/068C08L67/04C08L83/04C08K3/36C08K2003/3009C08L61/16C08K3/04C08K2003/2227
Inventor 姜文英仝延锋张永兆刘绍辉王勇王建彬宋建平
Owner LUOYANG SUNRUI SPECIAL EQUIP
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