The matching relationship between rolling elements and processing of bearing inner and outer rings
The matching relationship between rolling elements and processing of bearing inner and outer rings is the key to the normal operation of bearings. The rolling elements roll in the raceways of the inner and outer rings, and their dimensional accuracy and shape accuracy must be highly matched with the raceways. From a dimensional point of view, the diameter tolerance of the rolling elements needs to be strictly controlled to ensure that there is a suitable clearance between the inner and outer ring raceways. If the diameter of the rolling element is too large, the clearance will be too small, the friction will increase during operation, too much heat will be generated, and it may even get stuck; if the diameter is too small, the clearance will be too large, which will cause uneven force on the rolling elements when the bearing is under load, reducing the bearing capacity and rotation accuracy. In terms of shape, the consistency of the geometric shapes such as roundness and cylindricity of the rolling elements and raceways is also very important, which can ensure that the rolling elements roll smoothly in the raceways and reduce vibration and noise.
The matching relationship between the cage and the rolling element
The cage plays the role of separating and guiding the rolling elements in the bearing, and its matching relationship with the rolling elements directly affects the performance of the bearing. The size and shape of the cage pockets must match the rolling elements. If the pockets are too large, the rolling elements are prone to shaking in them, affecting the stability of the bearing; if the pockets are too small, they will produce a large binding force on the rolling elements, increasing the movement resistance of the rolling elements. In addition, the material and structural design of the cage determine its stability and support capacity for the rolling elements during high-speed operation. For example, in high-speed bearings, the use of lightweight and high-strength cage materials and the optimization of the pocket design can reduce the impact of centrifugal force on the rolling elements and cages, ensuring that the rolling elements run stably in the appropriate position.
The matching relationship between the cage and the processing of the inner and outer rings of the bearing
The cage and the processing of the inner and outer rings of the bearing also have an important matching relationship. The cage needs to have appropriate positioning and guidance between the inner and outer rings to ensure its own stability and correct guidance of the rolling elements. There should be a certain gap between the outer diameter of the cage and the inner diameter of the outer ring of the bearing, and between the inner diameter of the cage and the outer diameter of the inner ring of the bearing. This gap should ensure that the cage can rotate freely, but it should not be too large, otherwise it will cause the cage to shake in the bearing and affect the motion trajectory of the rolling element. At the same time, the edge shape and structure of the cage should match the design of the inner and outer rings to avoid interference with the inner and outer rings during operation.
The influence of comprehensive matching relationship on bearing performance
The matching relationship between the processing of the inner and outer rings, the rolling element and the cage is an interrelated whole, which has a comprehensive impact on the performance of the bearing. Appropriate matching can make the bearing perform well when it is subjected to different types of loads (such as radial loads and axial loads), and improve the bearing's load capacity and life. Good matching can also reduce the friction, wear, vibration and noise of the bearing during operation, and ensure that the bearing can operate stably and reliably under complex working conditions such as high speed, high temperature and high load, so as to meet the strict requirements of various mechanical equipment for bearing performance. When designing and producing bearings, these matching relationships must be comprehensively considered, and the best matching effect can be achieved through precise size control, material selection and structural optimization.
