Failure Analysis of Full Roller Bearings Without Outer Ring

The rotational speed of the full complement cylindrical roller bearing without an outer ring is much lower than that of the cylindrical roller bearing with a cage, but the installation space requirement is small, the bearing capacity is high, and the rigidity is high, which fully meets the limit requirements of the planetary gear reducer for the bearing. IDC can provide single-row and double-row full complement cylindrical roller bearings and thrust washers for planetary gear reducers, and can also design the size and style of bearings according to customer requirements, including single-sided chamfering of the inner ring, multi-row Bearings, diameters and widths are non-standard, etc. 1. A full-complement roller bearing assembly die without an outer ring, characterized in that: it comprises a die body, and the die body is provided with a stepped hole-shaped die cavity, and the die cavity comprises an axial depth that is adapted to the height of the inner ring rib. The inner ring positioning cavity and the annular roller retaining cavity corresponding to the position of the inner ring raceway, the radial peripheral surface of the roller retaining cavity is the roller radial positioning surface for lateral positioning of the roller, The diameter of the roller holding hole is larger than the diameter of the inner ring positioning hole, and the other port of the roller holding hole relative to one end connected to the inner ring positioning hole is an opening for the bearing inner ring to be loaded into. A through roller filling notch is provided laterally in the holding cavity. 2 . The assembly die for a full complement roller bearing without an outer ring according to claim 1 , wherein the depth of the roller holding hole is smaller than the height of the roller. 3 . 3. The outer ring-free full complement roller bearing assembly mold according to claim 1 or 2, characterized in that: the mold body is cylindrical, and the mold body further has a hollow cavity that penetrates to the inner ring positioning cavity. Full-roller bearings without outer ring play a very important role in many mechanical equipment. In recent years, my country's machinery industry has achieved very good development, so bearings have also been improved, and more and more different types of bearings. Products appear in people's production and life, and the common development with the machinery industry has promoted my country's economic development. 1. Knock method: just knock it down with a hammer, this method is more direct, but it is easy to damage the equipment by knocking; 2. Hot dismantling method: This method is more practical, that is to heat it to a certain temperature to make it fully loaded The bearing ring of the needle roller bearing is expanded, so that it can be easily removed; 3. Pushing method: This method is difficult to master, and there are many problems to pay attention to; 4. Pulling method: It is pulled out through a tool , this is also possible. No outer ring full complement bearing burns. Burned bearings have tempering on their raceways and rolling elements. One of the reasons for the burn: the bearing is not installed correctly, the position is not in the center, if the deflection is large, it is easy to cause the bearing temperature to rise, and the phenomenon of bearing burn occurs; the second reason: the lubrication of the bearing is insufficient, and the quality of the lubricating oil does not meet the requirements Requirements or deterioration; Reason three: The bearing assembly is too tight, and the influence of thermal expansion is not considered in the design, resulting in smaller and smaller bearing clearances during operation. The metal of the cage adheres to the rolling elements. One of the reasons: the rolling elements of the thin-walled bolt roller bearing are too tightly assembled with the cage during the installation process, and the rolling elements are stuck in the cage when the bearing rotates at high speed; the second reason: the quality of the lubricating oil does not meet the requirements or deteriorates , The lubricating oil pipeline is blocked, resulting in insufficient lubrication. No outer ring full roller bearing race cracks. The reasons for cracks in the bearing race of the thin-walled bolted roller bearing may be that the bearing is too tight, the outer ring or inner ring of the bearing is loose, the bearing part is deformed, and the surface of the bearing is poorly machined.

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