Zeneo bearing internal clearance
Clearance is bearing clearance between inner ring and outer ring, rolling body; Is an important technical quality requirements in the standard provisions of the state, it is important to check project, or one of the important technology index of bearing applications. Oil bearing internal clearance including radial clearance and axial clearance of two oil. Radial oil gap is divided into 2, 0, 3, 4, and 5 groups of five, 0 group as the basic clearance, its value increases in turn, generic code (C) said. Bearing internal clearance and the service life of bearing, WenFanRong prosperity, has close relation with the vibration and noise.
Radial clearance definition in different angles, not any external load, a ring relative to another ring from a radial eccentric limit position move to the opposite extreme position of the arithmetic mean of the radial distance. In theory, the radial clearance (centripetal bearing) is the outer ring raceway diameter minus the inner ring raceway contact minus two times the diameter of roller diameter.
Axial clearance definition does not bear any external load, a relative another ring ring axial limit position from a move to the opposite extreme position of the axial distance arithmetic mean.
In the design and practice, and often divides into the clearance design clearance, the original clearance, installation work clearance and oil clearance.
Design clearance according to the theoretical conditions calculus theory clearance numerical equipping values. The original clearance is bearing clearance before installation, each kind of standard is usually given by the original clearance value. After installation clearance is bearing clearance, because of the interference fit, install windage is less than the original clearance. Work clearance is in the actual operation conditions of clearance. Bearing at work, because the cause of the inner and outer temperature difference reduce installation clearance, and the role of the working load and roller ring produce elastic deformation causes the original clearance increases, in general, working clearance is always greater than the installation clearance, and must be less than the original clearance.
Internal clearance selection and application
Bearing on the job, make the inner and outer temperature difference temperature change, can reduce installation clearance, at the same time, the load function make the roller and ring to produce elastic deformation, and will increase the clearance. Usually work clearance slightly bigger than the installation clearance, in order to get the most satisfactory work performance, should choose appropriate work clearance.
Clearance of bearing by a certain amount of negative requirements can make bearing load has certain preload, purpose is to improve the stiffness of bearing, also can improve the service life of the bearing; When preloading charge more than the best range of ceiling, increasing bearing stiffness, and friction and heat are a sharp increase in bearing life also fell sharply. When the clearance is too large, a smaller number of the load bearing roller, roller under the maximum load is bigger, bearing life and reduces.
Therefore, the choice of the internal clearance, with the exception of bearing working conditions should be considered, such as load, speed, temperature, etc.) and the use of the bearing performance requirements (such as vibration and noise, friction torque, rotating accuracy, etc.), consider the shrinkage of bearing clearance after installation, the influence of working temperature for clearance.
Radial clearance definition in different angles, not any external load, a ring relative to another ring from a radial eccentric limit position move to the opposite extreme position of the arithmetic mean of the radial distance. In theory, the radial clearance (centripetal bearing) is the outer ring raceway diameter minus the inner ring raceway contact minus two times the diameter of roller diameter.
Axial clearance definition does not bear any external load, a relative another ring ring axial limit position from a move to the opposite extreme position of the axial distance arithmetic mean.
In the design and practice, and often divides into the clearance design clearance, the original clearance, installation work clearance and oil clearance.
Design clearance according to the theoretical conditions calculus theory clearance numerical equipping values. The original clearance is bearing clearance before installation, each kind of standard is usually given by the original clearance value. After installation clearance is bearing clearance, because of the interference fit, install windage is less than the original clearance. Work clearance is in the actual operation conditions of clearance. Bearing at work, because the cause of the inner and outer temperature difference reduce installation clearance, and the role of the working load and roller ring produce elastic deformation causes the original clearance increases, in general, working clearance is always greater than the installation clearance, and must be less than the original clearance.
Internal clearance selection and application
Bearing on the job, make the inner and outer temperature difference temperature change, can reduce installation clearance, at the same time, the load function make the roller and ring to produce elastic deformation, and will increase the clearance. Usually work clearance slightly bigger than the installation clearance, in order to get the most satisfactory work performance, should choose appropriate work clearance.
Clearance of bearing by a certain amount of negative requirements can make bearing load has certain preload, purpose is to improve the stiffness of bearing, also can improve the service life of the bearing; When preloading charge more than the best range of ceiling, increasing bearing stiffness, and friction and heat are a sharp increase in bearing life also fell sharply. When the clearance is too large, a smaller number of the load bearing roller, roller under the maximum load is bigger, bearing life and reduces.
Therefore, the choice of the internal clearance, with the exception of bearing working conditions should be considered, such as load, speed, temperature, etc.) and the use of the bearing performance requirements (such as vibration and noise, friction torque, rotating accuracy, etc.), consider the shrinkage of bearing clearance after installation, the influence of working temperature for clearance.