Shanda Bearing explains the sealing structure of the belt conveyor bearing.
Roller bearing efficient sealing structure
The harsh working environment requires the bearing to have a funny and durable sealing structure. The sealed bearing of the built-in roller bearing is usually designed and manufactured according to the requirements of structure, material and fixing method. Therefore, this paper focuses on the sealing structure of the external roller bearing. For low-speed operation, when the bearing is installed, the bearing and the housing can be filled with grease, which is equivalent to an additional sealing structure.
Lubrication of roller bearings
Statistics show that more than 50% of bearing faults are caused by improper lubrication. Therefore, in the initial stage of roller bearing design, bearing lubrication should be highly valued. Roller bearings are generally greased rather than oil lubricated. The procedure for selecting grease: 1) Determine the consistency level of the grease. According to the standard DIN51818-1981, greases are classified into different consistency internationally according to the NLGI standard. The higher the NLGI level, the thicker the grease.
2) Select an additive. Choose the right grease additive based on conveyor engineering and operating conditions. Commonly used additives are extreme pressure anti-wear agents, anti-corrosion agents, solid lubricants and special additives.
3) Determine the viscosity of the base oil. The viscosity of the base oil determines the fluidity of the base oil. The higher the viscosity of the base oil, the thicker the base oil. In order to form an elastic hydrodynamic lubricating film, the bearing metal parts are separated from each other, and a base oil of a suitable viscosity must be selected for a specific working condition. The viscosity of the base oil determined should match the viscosity of the grease selected.
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