Timken thrust needle roller bearing damage reasons and maintenance skills

Before the thrust needle roller bearing is completely destroyed, it provides sufficient time for the user to find out. Do not ignore the existence of such friction. It will slow down the riding speed and make the long-distance physical power consumption more slower. If the roughness of the surface is small, if the lubricating film has a proper thickness, the probability of surface stress generation is relatively low, which is why it is necessary to properly select the appropriate oil for lubrication. However, if the pressure load exceeds The pu value of the oil film (fatigue load limit value, such as excessive speed, excessive pressure impact), the fatigue of the material will come sooner or later.
In order to let the timken bearing clamp the axis, the friction phenomenon of the bushing is prevented (this phenomenon will generate high temperature instantaneously on the high-speed rotating machine, causing the lubricating oil to burn out and even cause the heat to rise and become stuck), so the inside of the bearing The 铛 and the outer bowl (also known as the bearing box in the industry) use a kind of "overweight" phenomenon. Generally speaking, the shaft is larger than the inner sill, or the outer bowl is larger than the load. This kind of interference requires a lot of power to install. Into, and such loading requires a great force to strike the Palin, which will cause the Palin to be damaged during the tapping process, so the industrial large timken bearings usually adopt heating, hydraulic jacking and the like.
(1) The degree of difficulty in forming an alloy by metallurgical materials.
(2) Affinity of materials and lubricants.
(3) The friction factor of the auxiliary material in the non-lubricated state.
(4) The microstructure of the material.
(5) Thermal conductivity of the material.
(6) The size of the surface energy of the material and the characteristics of the oxide film.
The high-pressure oil is injected into the timken bearing through the nozzle by the oil pump, and the oil injected into the thrust needle roller bearing flows into the oil groove through the other end of the bearing. When the bearing rotates at a high speed, the rolling elements and the cage also form a gas flow at the relatively high rotation speed of the surrounding air. It is difficult to send the lubricating oil to the thrust needle roller bearing by the general lubrication method, and the high pressure injection method must be used. Lubricating oil is sprayed into the double row deep groove ball bearings. The position of the nozzle should be between the inner ring and the center of the cage.

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