Introduction of paper and carton machinery and use of lubrication

Foodjx Guide: The working environment of papermaking machinery is moist and high temperature, and some equipments are also accompanied by impact load. Therefore, the choice of lubricants mainly considers its emulsification resistance, water resistance, thermal oxidation stability and load resistance. The lubrication points on the paper machine are in principle closed. The wet sections of the paper machine, ie the headbox to the press section, are sealed with a sealed bearing shell for water immersion and grease spillage. The dry section of the paper machine uses a central lubrication station to pressure the lubricating oil to the bearings for lubrication and heat dissipation due to the high temperature during operation. The grease lubrication points on the wet end are mostly used for periodic manual inspection 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 oil supply and oil supply pipes and oil filling devices.

The lubrication station of the dry section of the paper machine is usually selected in the standard general-purpose model. Zui is better in terms of oil filtration capacity and oil temperature control ability. It is more suitable if there is magnetic filter and constant temperature control. The oil delivery capacity of the lubrication station should normally be calculated according to the heat dissipation requirements of each lubrication point.

The oil supply of the sealed bearing shells of the dry section of the paper machine is mostly made of an adjustable oiler, which is also called a drip valve, which allows the oil supplied to the bearing to continue in an appropriate amount. This type of oiler is very suitable and reliable for systems that manually adjust the amount of oil.

On the new high-speed wide-format paper machine, the main bearings in the wet section are also centrally and automatically lubricated by the central lubrication station. In this system, the wet and dry sections of the paper machine are each provided with a central lubrication station, but are uniformly managed and operated by an automatic control system. The control of the oil filling amount of each lubricating point is realized by a small metering pump driven by a micro motor. The automatic control system monitors the flow meter, pressure gauge, etc. on the oil filling pipeline by electronic computer or other software control mode, and realizes the metering oil pump motor. Regulation.

Common lubricants for paper machines and their associated equipment are as follows. Partial drive reducer, central lubrication station oil (dry section lubrication), shaker box, worm gear reducer, general plain bearing, all lubricated with hydraulic oil or full loss system oil, with L-HL-46 or L-AN46 , oil viscosity at 40 ° C 41.4-50.6mm2 / s, flash point (opening) > 180 ° C, rolling point wet section rolling bearing: calcium-based grease, dropping point > 80 ° C, cone penetration (25 ° C, 1 / 10mm) 265-295. Exhaust fan, wet heat rolling bearing: sodium grease, dropping point > 40 ° C, taper (25 ° C, 1/10 mm) 220-250. Wire rope: Graphite calcium based grease, ZG-S, dropping point > 80 °C.

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