Universal coupling filling butter why can not play a lubrication role

Universal coupling filling butter why can not play a lubrication role

Because the toughness level of butter oil film is poor, and the universal joint has to accept large torque and alternating load in the work, so it is difficult to form a good oil film in bearings. Therefore, the smooth cross universal joint can not use butter, but should be added gear oil. Calcium-based smooth grease is composed of thickener calcium and smooth base oil, and its structure is comparatively dispersed. If the car continues to operate for a long time under large load, most of the smooth oil in the oil film will be separated out, and the oil film will not exist at all. And the activity of butter at room temperature is very poor, and the needle can only be rotated in place in the work. Therefore, when the original oil film fails, it is difficult to form a new oil film immediately, resulting in semi-dry friction or dry friction state of needle roller bearings and cross shafts. Diaphragm coupling manufacturer

Smooth grease evaporates to form a hard soap, which not only can not smooth itself, but also impedes the rolling of the needle; In addition, there is no oil discharge installation to the joint, the smooth fat can not be discharged, and the new smooth fat is inconvenient to inject. In maintenance operations, the injection of smooth grease can not enter the middle of the plastic needle, but extruded from the safety valve, and has become a degenerate soap, so the bearing is still not good smooth.