A kind of sliding plate for bridge support and its preparation method

A technology of bridge bearings and slide plates, applied in the direction of coating, etc., can solve the problems that the compressive stress cannot be higher than 45MPa and the pressure bearing capacity is not high, and achieve the effects of good wear resistance, improved bearing capacity and high hardness

Active Publication Date: 2020-06-09
LUOYANG SUNRUI SPECIAL EQUIP
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Problems solved by technology

At present, the non-metallic sliding plates of the bearing friction pairs mainly include polytetrafluoroethylene and modified ultra-high molecular weight polyethylene. These two materials have the advantages of good self-lubrication, small friction coefficient and good wear resistance, but the pressure bearing capacity is not good. High, which determines that the maximum vertical design compressive stress of the current support cannot be higher than 45MPa
However, with the improvement of the bearing capacity requirements of the bearing, the vertical design stress of the bearing will be greatly increased, and polytetrafluoroethylene and modified ultra-high molecular weight polyethylene are far from meeting the high bearing requirements of the bearing; therefore, it is necessary to develop a A non-metallic slide plate for bridge bearings with high bearing capacity, good self-lubricating performance and excellent wear resistance

Method used

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  • A kind of sliding plate for bridge support and its preparation method
  • A kind of sliding plate for bridge support and its preparation method

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preparation example Construction

[0038] The present invention also provides a preparation process for the above-mentioned modified material, which mainly includes the following steps:

[0039] (1) Raw material preparation: dry resins such as polyphenylene sulfide and polytetrafluoroethylene at 105°C for 2 hours for later use;

[0040] (2) Activation treatment: surface-treat the reinforcing fibers, molybdenum disulfide, etc. with a coupling agent, dry at 110°C for 2 hours, and then pulverize for later use;

[0041] (3) Preparation of mixture: put the resin matrix, friction performance modifier, and reinforcement system into a high-speed mixer according to a certain mass ratio for high-speed mixing to obtain the mixture;

[0042] (4) Extrusion granulation: Add the mixture prepared in step (3) into the twin-screw extruder for extrusion granulation; the heating temperature setting range of each section of the extruder is 270 ° C ~ 310 ° C The temperature gradually rises from the hopper to the die; the strips at ...

Embodiment 1

[0046] For the preparation of the material of the present invention, each material is compounded according to the following weight ratio: 85% polyphenylene sulfide, 4% polytetrafluoroethylene micropowder, 1% molybdenum disulfide, 9% carbon fiber, 1% graphene;

[0047]First use 1% silane coupling agent KH550 of carbon fiber to carry out surface treatment to carbon fiber, use 1% silane coupling agent KH550 of molybdenum disulfide to carry out surface treatment to molybdenum disulfide, then, polyphenylene sulfide, poly Tetrafluoroethylene and surface-activated carbon fibers and molybdenum disulfide were placed in a vacuum oven at 110°C for 2 hours to dry; the carbon fibers were pulverized and mixed with polyphenylene sulfide, polytetrafluoroethylene, molybdenum disulfide, graphene, etc. Stir and disperse at high speed in a high-speed mixer. The mixed and dispersed mixture is introduced into the hopper of the extruder, and the heating temperature of each section of the extruder is...

Embodiment 2

[0049] For the preparation of the material of the present invention, each material is prepared according to the following weight ratio: 40% polyphenylene sulfide, 16% polytetrafluoroethylene micropowder, 4% molybdenum disulfide, 36% carbon fiber, 4% graphene;

[0050] First use 2% silane coupling agent KH550 of carbon fiber weight ratio to carry out surface treatment to carbon fiber, use 2% molybdenum disulfide weight ratio silane coupling agent KH550 to carry out surface treatment to molybdenum disulfide, then polyphenylene sulfide, Polytetrafluoroethylene and surface-activated carbon fibers and molybdenum disulfide were placed in a vacuum oven at 130°C for 2 hours to dry; Stir and disperse at high speed in a high-speed mixer. The mixed and dispersed mixture is introduced into the hopper of the extruder, and the heating temperature of each section of the extruder is set between 270°C and 310°C, and the extrusion granulation is carried out after the temperature of each section...

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Abstract

A slide plate for a bridge support, the slide plate raw material includes a polyphenylene sulfide resin matrix, a friction performance regulator, and a reinforcement system; in terms of weight percentage, the polyphenylene sulfide resin matrix is ​​40% to 85%, and the friction performance adjustment agent The additive is 5%~20%, and the reinforcement system is 10%~40%. Through the modification of special engineering plastics, the modified material has the characteristics of strong pressure bearing capacity, small friction coefficient and excellent wear resistance. The friction performance of the non-metal sliding plate prepared by the method is basically the same as that of the existing polytetrafluoroethylene and ultra-high molecular weight polyethylene, but the wear resistance and bearing performance will be greatly improved.

Description

technical field [0001] The invention belongs to the development field of polymer materials for bridge supports, and in particular relates to a polymer slide plate for bridge supports and a preparation method thereof. Background technique [0002] As a necessary part of railways, highways and other lines, especially in high-speed railways, bridges account for an increasing proportion. As the "joint" part connecting bridges and piers, the amount of bridge bearings is also increasing day by day. With the advancement of technology, the speed of high-speed railway trains is getting faster and faster, and the weight of heavy-duty railway trains has doubled. At the same time, the application of high-strength concrete is gradually promoted, all of which require bearings to have high bearing capacity. The bearing capacity of the bearing is mainly determined by the bearing capacity of the non-metallic sliding plate in the friction pair. At present, the non-metallic sliding plates of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08L27/18C08L77/10C08K9/06C08K9/04C08K3/30C08K7/06C08K3/04C08K7/14B29B9/06B29C45/00
CPCB29B9/06B29C45/0001C08K2003/3009C08L81/02C08L2205/03C08L2205/16C08L27/18C08K9/06C08K9/04C08K3/30C08K7/06C08K3/04C08K7/14C08L77/10
Inventor 张永兆姜文英王建彬
Owner LUOYANG SUNRUI SPECIAL EQUIP
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