Coupling with grease when assembling the coupling

       Couplings have double-end tooth profile, single-end tooth profile, jaw type, leaf spring type, disc spring, cross slide type and roller chain type.Because of the different types, some are lubricated with lubricating oil, and some are lubricated with grease.The main coupling of the steel mill rolling mill refers to the cross slide universal coupling, which is an indispensable part of the rolling equipment, and the working conditions are extremely harsh.The semicircular connecting copper slider will work under severe impact load and extreme pressure (the deflection angle of the connecting rod is often greater than 120), therefore, the plane and arc surface of the slider will be severely worn.In addition, the entire coupling is also exposed to dust, scales, moisture and high temperature.Obviously, under such harsh working conditions, maintaining good lubrication is very important.The lubricating grease used for the main coupling slider of the rolling mill mainly includes extreme pressure lithium grease (including semi-fluid extreme pressure grease), graphite calcium grease and calender grease.Where there are special requirements, suitable special grease should be used first.In the main shaft coupling of the tandem rolling mill, sliding type and gear type are generally used, which have commonality in lubrication, and use lithium-based grease or. MOS, as the main anti-friction agent, can obtain the effect of reducing friction.At the same time, in order to improve the adhesion, pressure feedability, and the OK value of the Timken test of the coupling grease, reduce the amount of friction iron powder, and improve the workability and extend the life of the gear, special calcium-based grease can also be used.

      In addition, for flexible and toothed couplings, some are lubricated with grease.That is, when the coupling is working, it can be lubricated due to the squeeze of grease.When assembling, grease is applied to ensure sufficient lubrication inside.The grease used in the high-speed device must ensure that the oil and soap do not separate under the action of centrifugal force, otherwise the coupling oil leakage will reduce the lubrication effect.At the same time, it requires multi-efficiency, that is, it must have heat resistance, and it must have a certain degree of cold resistance when working at low temperatures.The lubrication of spring-type couplings mostly uses grease.When assembling, the grease must fill the gap between the grids and be wrapped up to prevent grease leakage.Regular inspections are required during work, and extreme pressure lithium grease is generally used for refilling grease.

      Pin couplings and flexible chain couplings generally use extreme pressure lithium grease.The universal main coupling is also lubricated with grease. It can also be greased frequently without stopping the machine. Generally, grease products with good water resistance and strong adhesion are required.