Large width 35mm grinding of special bearings for coal mining
Release time:
2021-08-20
High molecular weight hydrocarbon and non-hydrocarbon mixture of special bearings for coal mining machinery. Its composition is generally alkane (straight chain, branched chain, multi-branched chain), cycloalkane (monocyclic, bicyclic, polycyclic), aromatic hydrocarbon (monocyclic aromatic hydrocarbon, polycyclic aromatic hydrocarbon), cycloalkyl aromatic hydrocarbon and oxygen-containing, nitrogen-containing , Sulfur-containing organic compounds and non-hydrocarbon compounds such as gums and asphaltenes. Biological base oil (vegetable oil) is becoming more and more popular, it can be biodegraded and rapidly reduce environmental pollution. Since all industrial enterprises in the world are seeking ways to reduce environmental pollution, and this "natural" lubricant has this characteristic, although the cost of vegetable oil is high, the increased cost is enough to offset the use of other mineral oils and composition lubrication Environmental management costs caused by oil. China's industry is showing a straight upward trend. The demand for lubricants for iron ore, exercise, and fine instrument manufacturing has doubled. In the post-automobile market era, China has become a battleground for automotive lubricants in the world. In the lubricant industry in 2012, what is exciting is the upsurge of local brands, breaking the dominance of the world's lubricant giants and domestic monopoly companies.
The special bearing for coal mining machine grinding has a large width of 35mm. In order to get used to the needs of bearing market products, the grinder was modified based on the principle of economy, so that it can process the inner rings of spherical roller bearings, self-aligning ball bearings, double groove ball bearings and short cylindrical roller bearings. For these four series of bearing inner hole shapes, a set of diamond roller grinding wheel dressers was planned. The diamond pen used for dressing grinding wheels was changed to high-precision diamond rollers. The diamond roller dressers were planned separately according to the shape of the product and used The grinding wheel is trimmed to satisfy the process requirements of the surface forming and trimming of the inner ring of the bearing and the one-time cutting and grinding process. At the same time, corresponding improvements have been made to the original hydraulic system, mechanical transmission, and electrical system of the machine tool.
Not all bearings require a small operating clearance, you must choose an appropriate clearance according to the conditions. The basic radial clearance group is suitable for general operating conditions, conventional temperatures and commonly used interference fits; bearings operating under special conditions such as high temperature, high speed, low noise, and low friction should choose large radial clearances; The bearings for fine spindles and machine tool spindles should be selected with smaller radial clearance; for roller bearings, a small amount of operating clearance can be maintained. In addition, there is no such thing as clearance for separate type bearings; the operating clearance after the bearing is installed is smaller than the original clearance before installation. Because the bearing has to bear a certain load rotation, there is also bearing coordination and load. The amount of elastic deformation.
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