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Rolling bearing cooperation
Source: China Bearing Network Time: 2014-01-15
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First, the cooperative selection of the inner diameter scale and outer diameter scale of the rolling bearing is made according to the norm; the inner ring of the bearing and the shaft; the cooperation of the outer ring and the seat hole can only be achieved through the public and seat hole of the steering journal. The service is completed. The cooperation between the inner ring and the shaft of the bearing is made by the base hole system; the cooperation between the outer ring of the bearing and the seat hole is made by the shaft system. The common cooperation of the rolling bearing. Correct selection and cooperation; it is necessary to know the actual load conditions of the bearing; the working temperature and Other needs; and in practice it is very difficult. Therefore, most of the situation is based on the use of fine research to select cooperation.
Second, the nature of the load selection cooperation should first consider the rotation of the load vector relative to the ferrule. According to the composition of the radial load vector is related to the rotation of the ferrule; the composite accepted by the ferrule can be divided into: fixed load, rotating load and rocking load .
a. The fixed load acts on the radial load of the ferrule; it is accepted by a part of the ferrule raceway; and is transmitted to the corresponding part of the shaft or the bearing housing; this load is called the fixed load. It is characterized by the radial composition. The load vector is relatively stopped with the ferrule. The ferrule that accepts the directional load can be loosely cooperating.
b. The rotating load acts on the ferrule to form a radial load; it rotates in the circumferential direction of the raceway; it is accepted by each part in turn; this load is called the rotating load; it is characterized by the composition of the radial load vector related to the ferrule rotation. Accept Rotating load ferrules should be selected for cooperation; in special conditions; if the load is very light; or under heavy load effect, the ferrule only happens to change at low speed; when the bearing is made of harder materials and the surface roughness is higher; The ring can also be used with a looser cooperation.
c. The swaying load effect on the ferrule constitutes the radial load direction; this load condition is called the sway load or the non-directional load; it is characterized by the composition radial load vector on the effect ferrule in the certain area of ​​the ferrule raceway Swing; acceptable for the required area of ​​the raceway; or the load on the bearing is the impact load; the oscillating load; its direction; the load whose value is often changed. The cooperation of the bearing inside the bearing, the outer ring and the state, the bearing housing hole Should choose to work closely.
Third, the excessive weight of the load ferrule and the shaft or the shell depends on the load. Now the mother of the Han dynasty æŽ èŸ® 蟮 蟮 蟮 浚 浚 汉 汉 汉 汉 . . . . . . . . . . . . . . . . . . . Dividends are three conditions: “lightâ€, “normal†and “heavy†load.
Fourth, the selection of the shaft and shell hole public service belt 5, the roughness of the cooperation surface and the shape of the public service cooperation surface roughness and shape public service; directly affect the product performance; such as wear resistance; corrosion resistance and cooperation properties Etc. To this end; reasonable rule axis and shell hole shape and public service and proposed the roughness requirements of the cooperation appearance; on the nature of stability and cooperation; to improve the joint strength of win-win cooperation is essential.
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