The invention discloses a preparation method of high shear stability
lithium grease, comprising the following steps: saponifying, heating to dehydrate, refining at high temperature,
quenching sharply to mix, standing, mixing into
grease, shearing, homogenizing, re-shearing and deaerating. The preparation method of high shear stability
lithium grease adds the steps of standing and recutting and overcomes the defect of uneven growth of
soap fibers in the traditional
lithium grease production technology, and the length of the
soap fibers has a proper proportion, therefore, a three-dimensional cavity formed by the
soap fibers can absorb a large amount of
base oil, and an orienting arrayed
crystal fiber structure is formed. When the good
colloid stability of the lithium grease is ensured, the lithium grease has prominent high shear stability, the penetration change rate of 100 thousand time extended work is less than 8 percent, a bearing grease exchanging period can be extended above 2000 hours / time from 500 hours / time generally, and the service life of
mechanical equipment can be prolonged by 4-5 times.