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Description

Plastic tile on the market today are two major types:

A PTFE plastic tile (surface white), it is pure PTFE sheet, and wire elastic layer composite made of composite tile surface. PTFE, the lowest coefficient of friction in the solid material, excellent self-lubricating properties and resistance to chemical corrosion. But there are also: low mechanical strength, creep resistance, thermal expansion, size, instability, and poor wear resistance shortcomings.

Another modified PTFE plastic tile (surface grayish black), it is added in pure PTFE modified materials, the composite made with the wire elastic layer composite tile surface. The material to make up for the shortcomings of pure PTFE, the wear resistance of more than seven times, the material properties are improved. But there is the addition of modified materials containing heavy metals lead (leaded up to *0%) do not meet environmental requirements, which is the fatal shortcoming of the product.



Turbine generator plastic thrust bearing operation research "***7 China Electricity Council, the organization of industry experts, the use of plastic tile at home and abroad by *5 units in *1 large hydropower research, the actual useful life generally does not exceed *7 years. The research report: "I hope the plastic tile manufacturing unit attaches importance to the life of the early realization of the life expectancy; brazing quality has a direct impact on the wear and service life of plastic tile proposed research using scientific methods of detection.



Surface friction material wear resistance of the pros and cons of plastic tile, plastic tile life and safe and reliable operation. Bearing wear resistance is poor, easy to produce wear debris, especially debris increase in the initial run breaking-in period, and Kai stop line speed is lower than the lubrication boundary conditions, due to plastic wear debris density, floating in the oil surface, when the oil filter can not effectively floats all filtered conditions, run-time, the role of mixing in the rotating parts, debris completely mixed with the lubricant, resulting in damage to bearing surface, or even debris clogging wedge into the oil into the oil side parts of the accumulation of side Can not create a hydrodynamic lubricant film, when the tile surface, severe wear and tear (the tile surface along the circumference of a shallow furrow-like), serious bearing occurrence of burning. Therefore, to ensure that the plastic pad has higher reliability and safety margin, to further improve the wear resistance of the surface of friction materials is very important. ·FZB3G plastic tile surface friction and material properties      New generation of FZB3G plastic tile surface friction material properties, to ensure environmental requirements and reduce the friction performance conditions to improve the wear resistance. Synthetic fibers of high strength and high wear-resistant special engineering plastics reinforced modified PTFE, the formation of high-strength fiber as the backbone, high wear-resistant engineering plastics for wear particles, provide a low friction PTFE solid lubrication matrix environmentally friendly high-performance composite materials. The organizational structure of the material shown in Figure 1 and Figure 2.                   Figure 1: tiling organizational structure                     Figure 2: the organizational structure of materials fracture Surface material formulations modified PTFE Reinforced by two high-performance add material under a microscope to the surface tissue (Figure 1) uniform distribution of dense and lighter in color highlights, mainly in the high wear-resistant engineering plastics wear particles of the matrix, material fracture morphology (Fig. 2) for high strength fiber evenly distributed in the resin between the disordered criss-cross mesh skeleton to improve the resistance to compression and shear behavior of friction materials, a substantial increase friction material wear resistance, and increase fastness between the pad of friction material and metal wire.

FZB3G plastic tile surface material also has excellent water lubrication performance. Water as a lubricating medium, a good low friction properties and excellent wear resistance (water lubrication wear coefficient of 8.*8 × ***9 cm3 / N · m). Conditions in the oil-water mixed lubrication conditions, the bearing can still operate safely.