ZYS precision bearing, ball bearings, roller bearings, bearing parts

The pitch bearing is a kind of rolling bearing. The ball ball is installed in the middle of the inner steel ring and the outer steel ring, and can bear a large load. Also called ball bearing. The purpose of pitch bearings is to determine the relative position of two parts (usually the shaft and the bearing seat) and ensure their free rotation, while transmitting the load between them. At high speeds (eg in gyro ball bearings), this use can be expanded to include free rotation with little wear in the bearings. In order to achieve this state, an adhesive fluid film called an elastic hydrodynamic lubrication film can be used to separate the two parts of the bearing. Denhard (1 966) pointed out that the elasticity can be maintained not only when the bearing bears the load on the shaft, but also when the bearing is preloaded so that the positioning accuracy and stability of the shaft do not exceed 1 microinch or 1 nanoinch Hydrodynamic lubricating film

As a renewable and clean energy source, wind power is rapidly developing all over the world. Large wind turbines are giant machinery. Nowadays, many 2MW wind power plants under construction have wind turbine blades with a length of about 40 meters, a rotating shaft with a height of 60 to 100 meters and total weight of more than 200 tons. Therefore, the bearings used in wind power must also be large, with an inner diameter ranging from 100 mm to 700 mm. Some models require bearings with an inner diameter of nearly 2 meters. Bearings for wind turbines require high reliability, because the bearings are designed to keep the windmill running for 20 years; and when the fault occurs, the parts are not easy to replace (the bearing is used at a long distance from the ground). Bearing manufacturers need to have a high degree of computer analysis technology and exquisite skills in materials and heat treatment, and need to master the testevaluation technology for large bearing . ZYS has been en...