Grease lubrication and oil lubrication of Rolling Mill for Two high openable housing mill with top screw down in China

At present, the lubrication of Rolling Mill for Two high openable housing mill with top screw down bearings on the market mainly adopts two mainstream lubrication methods: grease lubrication and oil lubrication. Grease lubrication is one-time lubrication combined with online oil injection, and oil lubrication is mainly oil-air lubrication.

Commonly used grease lubrication: Commonly used greases include calcium-based grease, sodium-based grease, calcium-sodium-based grease, lithium-based grease, aluminum-based grease, and molybdenum disulfide grease.

Macroscopically, grease lubrication is the mainstream of hot rolling. For example, grease lubrication is the mainstream of wire and bar mills, and general-purpose lithium grease and molybdenum disulfide are the main ones. Strip steel and hot coiled plate are mainly composed of calcium sulfonate and calcium base grease.

The working environment of hot-rolled bearings is relatively harsh, such as cooling water, high temperature, impact, iron oxide scale, etc., while hot-rolled bearings use grease as the lubricating medium. Its advantage is that the fluidity of the grease is small, and it is not easy to leak and form an oil film. The strength is good, and it is more conducive to the sealing use of Rolling Mill for Two high openable housing mill with top screw down bearings. At the same time, it has a certain degree of shock absorption for rolling vibration, and the most important thing is safety and stability. It is not easy to cause bearing damage due to lack of oil or oil. The disadvantage is that it makes bearing maintenance and cleaning more complicated.

The bearings of cold Rolling Mill for Two high openable housing mill with top screw downs are mainly lubricated with oil. For example, single cold Rolling Mill for Two high openable housing mill with top screw downs, four-high six-high Rolling Mill for Two high openable housing mill with top screw downs and five- and six-continuous six-high Rolling Mill for Two high openable housing mill with top screw downs, mainly use 220#280#320#380# heavy-duty gear oil.

Compared with hot rolling, cold rolling bearing working conditions have less impact, less dust, low outside temperature, but cold Rolling Mill for Two high openable housing mill with top screw down bearings are generally fast, so oil-air lubrication is often used. The advantages are easy maintenance and inspection, cooling and lubrication, and high speed , Low lubrication cost. But the disadvantage of oil lubrication is that oil lubrication requires the bearing to maintain a good sealing condition to avoid leakage of lubricating oil. In addition, oil lubrication requires a more complicated oil supply device, which is not as convenient as lubricating grease in operation and use, which increases the maintenance workload of rolling bearings. The most important thing is that the smooth flow of the oil circuit system must be guaranteed, and the oil circuit failure will directly Lead to bearing oil shortage and damage.