What is the working principle of bimetal bearing?
According to the principle of bimetal bearing can be divided into: (bearing) and rolling friction bearing sliding friction bearings (bimetal bearing).
If you can form a bimetal bearing on the surface, the bimetal bearing lubricating film separates the secondary surface movement, which can greatly reduce the sliding friction, as the copper sleeve movement surface is not in direct contact, thus avoiding wear. bimetal bearing bearing capacity, high rotation accuracy, the impact of double-metal bearing bearing impact, therefore, access to a wide range of applications in the project.
The basic condition of the formation of the lubricating film is that the bimetal bearing can work properly, affecting the formation of lubricating film lubrication, the relative speed of the oil bearing movement, the physical properties of the lubricant and the surface roughness, and so on. The design of the bimetal bearing shall be based on the operating conditions of the bearing to determine the type of bearing structure, the choice of lubricant and lubrication method and to determine the geometric parameters of the bearing
bimetal bearing, bimetal bearing), bearings operating under sliding friction. bimetal bearing work stable, reliable, no noise. Fluid lubrication conditions, the sliding surface is not directly contact with the lubricating oil, but also can greatly reduce the friction loss and surface wear, oil film also has a certain vibration absorption capacity. But the starting frictional resistance is larger. The shaft bearing part is called the daily newspaper Bush and the journal matching part. In order to improve the bearing surface friction properties and the surface of the friction-reducing material layer is called the bearing lining. Bearing and bearing lining material collectively referred to as bimetal bearing material. Commonly used bearing alloy bimetal bearing material (also known as Babbit or white alloy), wear-resistant cast iron, copper and aluminum alloy, powder metallurgy materials, plastic, rubber, hardwood and carbon-graphite, polytetrafluoroethylene PTFE), modified polyoxymethylene (POM), and the like.
bimetal bearing is a steel plate as the matrix, the middle sintered spherical bronze powder, surface rolled polytetrafluoroethylene (PTFE) and lead mixture, made by the rolling. Ming Sheng double metal bearing features: and has a small coefficient of friction, wear-resistant engage in good corrosion and no oil lubrication characteristics. bimetal bearing advantages: the use of the product can reduce costs, reduce the mechanical volume, to avoid the phenomenon of bite axis and reduce the advantages of mechanical noise.
China is one of the countries that invented bimetal bearing earlier in the world. In ancient Chinese, the construction of axle bearings has long been documented. From the archaeological relics and information, China's oldest modern bimetal bearing structure of the prototype of the bearing, appeared in 221 to 207 BC (Qin Dynasty) in this province of Shanxi Province Yongji County Xue Jiaya village. After the founding of new China, especially since the seventies of this century, in the reform and opening up a strong push, the bearing industry has entered a new high-quality rapid development period.
At the end of the seventeenth century, the British C. Vallo designed and manufactured ball bearings and was fitted with a pilot in the postcart and the British P.worth won the ball bearing patent. At the end of the eighteenth century Germany H.R. Hertz published papers on ball bearing contact stress.
On the basis of the achievements of the Hertz, Germany's R. Streebeck, Sweden's A. Pam Glenn and others carried out a large number of tests, the development of bimetal bearing design theory and fatigue life has contributed to the calculation. Subsequently, Russia's N.P. Petrov applied Newton's law of viscousity to calculate bimetal bearing friction. The British O. Renault made a mathematical analysis of the discovery of Thor, derived the Reynolds equation, which laid the foundation for the hydrodynamic lubrication theory. In the founding of the past 50 years, China's bimetal bearing industry has made remarkable achievements.