The burning loss of the plastic thrust tile should be the destruction of the oil film. There are five main reasons for the oil film damage: the quality of the pump installation; the quality of the pump manufacturing; the bearing capacity is too large; the operating conditions; the quality of the plastic thrust tile.
The adjustment force of the thrust tile anti-heavy bolt is obviously small, the adjustment range is obviously large, and the force of the disk is also larger. It feels that the tile surface is soft and the hardness is not enough. After the manufacturer determined that the plastic thrust Wawa surface grinding amount is small, the finish is not enough; after the failure, the plastic thrust tile PTFE layer is still about 2.0mm thick (required thickness should be 1.5mm). For the finish, some tiles have a small amount of processing traces of about 1.5 mm wide during installation, but this is still the case with the new plastic thrust tiles used later. When the rubber injection molding machine is used to adjust the level of the unit, it is obvious that the adjustment force is larger.
The whole burning process is as follows: the plastic thrust tile is damaged due to the unqualified quality, and the temperature of the thrust tile is slowly increased. When the PTFE surface of the thrust tile surface reaches 232 e or more, the plastic thrust tile solder begins to melt and melt. The solder enters the lubricating oil, and a small amount is brought into the thrust end of the thrust tile. Most of it is deposited on the oil inlet side. A small part enters the thrust head mirror plate and the thrust tile together with the lubricating oil, and the incoming oil forms an oil film, which slows down. Direct friction, and the incoming solder intensifies the wear of the PTFE surface of the tile surface. The plastic enters the oil to degrade the oil, forming a vicious circle and increasing the temperature. Since a small amount of oil enters during this process, the surface of the plastic thrust tile is soft and shuts down in time, so that the plastic thrust tile surface remains substantially smooth without obvious signs of scratches and burns.
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