The working environment of papermaking machinery is humid and high temperature, and some equipment is also accompanied by impact load, so the choice of lubricant mainly considers its anti-emulsification, water resistance, heat and oxidation stability and load resistance. The lubrication points on the paper machine are closed in principle. The bearings in the wet section of the papermaking machinery, that is, the headbox to the press section, are sealed bearing shells to prevent cross-contamination due to waterproof immersion and grease overflow. The dry section of the paper machine uses a central lubrication station to deliver lubricating oil to the bearings for lubrication and heat dissipation due to the high temperature during operation. Most of the grease points on the wet end use regular manual inspections to check the injection and change the grease. Therefore, the lubrication system often refers to the central lubrication station of the dry section and all the transmission and oil supply pipelines and oil injection devices.
The lubricating station in the dry section of the paper machine is usually selected from standard general models. It is better to have a stronger oil filtering capability and oil temperature control capability. A magnetic filter and constant temperature control are more suitable. The oil delivery volume of the lubrication station should usually be calculated according to the heat dissipation needs of each lubrication point.
The oil supply of each sealed bearing shell in the dry section of the paper machine mostly uses an adjustable oil injector, which is also called a drip valve, which makes the oil supplied to the bearing appropriate and continuous. This kind of oil injector is very suitable and reliable for the system which adjusts the oil quantity manually.
On the new high-speed wide-width paper machine, the main bearings in the wet section are also centrally and automatically lubricated with a central lubrication station. In this system, the wet and dry sections of the paper machine are equipped with central lubrication stations, but they are managed and controlled by the automatic control system. The control of the oil injection amount at each lubrication point is realized by a small metering pump driven by a micro motor. The automatic control system monitors the flow meter and pressure gauge on the oil injection pipeline by means of electronic computer or other software control methods and implements the metering oil pump motor Regulation.
