How to choose marine bearing water lubricating material?
Ship rolling bearings generally consist of an outer ring, an inner ring, rolling elements and a cage. Strictly speaking, they are composed of outer ring, inner ring, rolling elements, cage, seals and lubricant. Rolling bearing can be defined as a rolling bearing mainly composed of outer ring, inner ring and rolling elements. According to the shape of the rolling elements, rolling bearing bearings and roller bearings. Bearings are an important part of modern machinery and equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient in motion, and ensure accuracy. According to the friction characteristics of moving parts, bearings can be divided into rolling bearings and sliding bearings. Among these bearings, rolling bearings have been standardized and serialized, but compared with sliding bearings, their radial dimensions, vibration and noise are greater, and the price is higher.
Tieli wood is a traditional water-lubricated bearing material for ships. Ironwood is produced in tropical regions. Slow growth, excellent material, high hardness and large proportion. It is rich in resin and has the characteristics of water immersion resistance, corrosion resistance and abrasion resistance. However, deformation and cracks will occur after drying. In addition to wood and resin, iron pear wood also contains resin concentrates and so on. The latex mucus formed by semen and water can greatly reduce the coefficient of friction and ensure the service life. For example, the friction coefficient of relative motion in water is 0.003-0.007. In addition, the coefficient of friction increases with the increase of water temperature. If the water temperature (about 50 degrees Celsius) is low and the water content is sufficient, ironwood has better wear resistance.
The iron bar (general thickness: 15mm-35mm, width: 60mm-80mm, length: 150mm-300mm) is tightly embedded in the bearing sleeve. In order to prevent the misalignment of the template strips, two or three copper stop strips (thickness 60% of the thickness of the iron-wood strip) are installed between the inner surfaces of the bushings, and they are fixed with bolts. The lower part of the bushing is vertical (the fiber direction is perpendicular to the center line of the tail shaft), and the upper part is parallel (the fiber direction is perpendicular to the center line of the tail shaft). V-shaped, U-shaped or trapezoidal water tanks are formed between the plates to facilitate the circulation of seawater for lubrication and cooling, but there is no water tank for the lower half tile 90.