The Nautilus bearing contact angle break through the traditional design,

The traditional pairing (or double row) tapered roller bearings, the contact angle is generally only 20 or so, to ensure its larger radial load capability, Bearing test machine axial load carrying capacity and the ability to withstand the overturning moment has certain limitations. Therefore, to ensure that a spindle designed to meet the application requirements, there must be another as a second pivot bearing to bear additional radial force, and the two bearing configurations, to meet the axis when subjected to the overturning moment , no deformation.
The Nautilus bearing contact angle break through the traditional design, the contact angle of each single bearing enlarged to 45. With conventional dual bearing configuration comparison, Nautilus bearing two single bearing contact points of connection is much higher than the normal distance between the tapered roller bearing, which connect two points of contact can be used as the point of intersection of two entire shaft a focus, a support shaft running spots.
segmented plastic cage
In addition to the larger contact angle, but the bearing Another notable feature is the use of segmented plastic cage. Internal parts of the bearing, the rolling bearing is an important component, in addition to maintaining the roll cage operating state, there are separate to avoid their mutual rolling friction function. Cage is not a force element, can not afford any form of force. Accordingly, it is often used to produce lighter material, while maintaining the frame material to meet another requirement that sufficient strength. Since the operation of the bearing cage rotation power needed is provided by the rolling body, therefore, the holder of the material requires a certain strength to ensure its normal operation.
For SKF Nautilus bearing, in order to ensure that the contact angle connection enough to withstand the force system, bearing sizes are often very large, more applications currently on the market with a diameter of 2 ~ 2.5 m of bearing products. Therefore, reducing the weight bearing itself as its design need to overcome technical problems. As part of the inner and outer bearing rings and rolling elements, in order to ensure that the bearing capacity, in the selection can not have the slightest careless. SKF Nautilus bearings of plastic, not only to ensure adequate strength and weight, to ensure the rotation of the bearing performance, while reducing friction within the bearing.
Segmented design SKF Nautilus bearing another feature (Figure 3). Four or five in the bearing rolling elements sharing a cage assemblies, and each cage without any other links between the components. If the bearing used in the conventional one-piece cage, the size is too large, the weight of the holder causes it to deform in the bearing during operation, this deformation causes the rolling element and the additional contact with the cage, generate additional friction. This will not only increase the bearing operating temperature, but also on the cage and rolling friction material wear and tear can lead to even rolling element cage deformation, and ultimately affect the carrying capacity of the bearing or even life.
Segmented cage, each individual component is very small, even if many components together, will not produce distortion. Also, because each component is only four to five rolling, therefore, the friction generated by the holder will be reduced to a minimum.
3 Application Features
Nautilus bearing is now widely used in high-power wind turbine, instead of the dual bearing design, reducing the size of the drive chain. So what this application can bring benefits in the end, in the application will produce what the problem?
Spindle conventional wind turbine designs, the division of the bearing force is generally fixed side bearings to withstand the axial load and part of all radial load, and the other end of the receiving section as a floating bearing radial load. Wind farm Wind determines the required size of the load bearing size, the bearing size is determined the distance between the two bearings, and also determines the length of the transmission chain.
Single bearing (Nautilus) is designed to ensure the same conditions, the bearing force by a bearing to withstand all of the axial and radial loads, reducing the size of the entire transmission chain. Single bearing design should be considered in addition to the internal preload, but in terms of the application of the bearing with double bearing without any distinction. And single bearing special cage design, so that in grease and oil lubrication conditions have a very good performance.
Only a bearing on the spindle, have realized the role of two bearings, then the stiffness of the bearing in the bearing design has become a key factor that must be considered. Nautilus bearing inner ring for the two separate parts, the application by checking wind turbines, in the production of bearing internal clearance will be designed into the ideal range, the bearing after installation, you can achieve optimal pre-
Clamping force, simplifying installation of bearings