具有“TL”特性的球面滚子轴承 “TL”特性是指通过对原有钢材进行特殊

Spherical surface having a "TL" Characteristics of roller bearings "TL" refers to the original properties of steel for special treatment, so as to obtain dimensional stability at high temperature and a raceway surface hardness, but also has an ordinary carburized steel same raceway surface residual compressive stress. Spherical roller bearings are most vulnerable to damage from the inner fatigue, for the analysis of the Japanese company NSK inner mechanism of fracture, and established a method to assess the strength, we developed a new bearing structure for high-temperature drying of paper production device. This has "TL" (Tough and Long Life ) performance of the new bearing, good toughness, long life. 1.1 Structure papermaking dryer cylinder in the high temperature equipment used, as shown in FIG. In operation the device generates heat expansion, up to a temperature of 200 ~ 250 ℃. Such high temperatures so that the probability of failure is greatly increased fracture of the inner ring. To solve the problem of breakage of the inner ring, the inner ring can be prevented by eliminating the temperature difference between the inner cylinder and the increased hoop stress. The methods for the cooling or adiabatic cylinder sleeve bearing member with the heat generated by a hollow insulating cylinder. The practical application of these methods make use of mechanical devices are complex structures, so the best way is to enhance the fatigue resistance of the bearing itself. The inner ring has a high fracture resistance, better than bainitic steel and bearing steel. <br>1.2 .2 dimensional stability at high temperature using a special predetermined S11 as a standard dimensional stability at elevated temperatures. This provision of content and its associated international standards bearing high temperature conditions consistent. The standard requires a high temperature condition at 200 ℃, bearing size to ensure stability. 1.2 .3 high hardness and long life of the surface hardness of the raceway great influence on the life. Since "TL" properties of the steel having high hardness, it is possible to achieve long life is required. Although "TL" characteristics of spherical roller bearings to prevent bearing fracture was originally papermaking equipment and developed, but it can also be used in other workplaces, because it has three significant advantages that the resistance to fracture, and good dimensional stability long life.

The "TL" characteristic of the spherical roller bearing "TL" characteristic refers to the use of the original steel by special treatment, so as to obtain a higher raceway surface hardness and high temperature of the ruler stability, but also with the same as ordinary carburet steel surface residual pressure stress. Spherical roller bearings are most susceptible to damage due to inner ring fatigue, for which NSK Japan analyzed the mechanism of inner ring fracture, and established a method of strength assessment, developed a new structure bearing for paper production and drying of high temperature equipment. This new bearing with "Tough and Long Life" properties is tough and has a long life. 1 .1 Structure The cylinder of the dryer in the high temperature equipment used for paper production, as shown in Figure 1. Thermal expansion occurs during operation of the equipment, at temperatures ranging from 200 to 250 degrees C. Such a high temperature greatly increases the chance of failure of the inner circle. In order to solve the problem of internal ring fracture, the increase of internal ring stress can be prevented by eliminating the temperature difference between the cylinder and the inner ring. The method is to cool the cylinder or to use an insulated sleeve to insulate the bearing components from the heat generated by the hollow cylinder. In practical application, the use of these methods will make the structure of the mechanical device very complex, because the best way to do this is to enhance the fatigue resistance of the bearing itself. The inner ring has a high anti-fracture resistance, which is better than the besphea steel and bearing steel.<br>1 .2 .2 dimensional stability at high temperatures Uses S11 special regulations as the standard for dimensional stability at high temperatures. The content of this provision is consistent with the international standards for bearings and their associated high temperature conditions. This standard requires the stability of the bearing size at a high temperature of 200 degrees C. 1 .2 .3 Surface hardness of high hardness and long life raceway has a significant impact on life. Because of the high hardness of the "TL" steel, the long life requirements can be achieved. Although the "TL" characteristic spherical roller bearing was originally developed to prevent bearing breakage in papermaking equipment, it can also be used in other workplaces because it has three distinct advantages: anti-break resistance, good dimensional stability and long life.

The "TL" characteristic of spherical roller bearing with "TL" characteristic refers to the special treatment of the original steel to obtain higher surface hardness of raceway and dimensional stability at high temperature, at the same time, it has the same residual compressive stress of raceway surface as ordinary carburizing steel. The spherical roller bearing is most easily damaged by inner ring fatigue. Therefore, NSK company of Japan analyzed the mechanism of inner ring fracture, established the method of strength evaluation, and developed a new structure bearing, which is used in the high temperature equipment of papermaking production and drying. This new type of bearing with "TL" (tough and long life) performance has good toughness and long service life 1.1 the cylinder of the dryer in the high temperature equipment used in the structural papermaking production is shown in Figure 1. In the operation of the equipment, there will be thermal expansion, and the temperature can reach 200-250 ℃. Such high temperature greatly increases the failure probability of inner ring fracture In order to solve the problem of inner ring fracture, the increase of inner ring stress can be prevented by eliminating the temperature difference between cylinder and inner ring The method is to cool the cylinder or to insulate the heat generated by the bearing parts and the hollow cylinder with the heat insulation sleeve. In practical application, these methods will make the structure of the mechanical device very complex, so the best way is to enhance the anti fatigue ability of the bearing itself. The inner ring has high fracture resistance, which is better than bainite steel and bearing steel.<br>1.2.2 for dimensional stability at high temperature, special provisions of S11 are adopted as the standard for dimensional stability at high temperature. The content of this regulation is consistent with the international standard of bearing and its related high temperature conditions. The standard requires that the stability of bearing size can be guaranteed under the condition of high temperature of 200 ℃ 1.2.3 the surface hardness of high hardness and long life raceway has a great influence on the service life. Because "TL" characteristic steel has high hardness, it can reach the requirement of long life. Although the "TL" spherical roller bearing was originally developed to prevent bearing fracture in papermaking equipment, it can also be used in other workplaces, because it has three significant advantages, namely, fracture resistance, dimensional stability and long life.<br>