Here are a few reasons:
1. The static sealing surface which matches the outer edge of the oil seal and the cavity is deformed because the dimensional tolerance does not meet the standard specifications;
2. The material cracks due to the harsh working conditions, especially the cracks on the sealing edge of the oil seal;
3. As the working conditions are too harsh and the rubber elastomer is incompatible with the working medium, the hardness of the rubber increases, or the hardness of the elastomer is too high;
4. The sealing medium swells the rubber and reduces the hardness of the rubber, thereby causing premature aging and wear of the oil seal;
5. Corrosion from the shaft to the sealing lip area will leave a permanently hidden trouble of the sealing performance of the sealing system;
6. The lubricant fails and the system is in a dry-running state so that the sealing lip wears quickly;
7. Comprehensive aging of both rubber elastomer and sealing medium.
8. "Oil-carbon" dirt is formed at the sealing lip, which causes the sealing lip of the oil seal to be lifted, causing leakage of the sealing system.
9. The sealing lip of the oil seal no longer follows the vibration of the shaft surface and the beating of the shaft;
10. Contaminants are permanently embedded in the sealing edge from the inside and outside of the seal, causing premature wear of the shaft surface and the sealing lip;
11. Irregular assembly process causes damage to the contact surface of the shaft surface and premature wear of the sealing lip;
12. The sealing edge is damaged during storage, transportation, and assembly.
In Addition To The Above
We can analyze the causes of leakage according to the time course of oil seals being used, such as early-phase damage and leakage at the beginning of use; premature damage and leakage after a short period of use; damage and leakage after a fairly long period of use in work; damage and leakage at the end of the designed service life.
Hapa kuna sababu chache: 1. "Sehemu ya ""Static"" ya kuunganisha, ambayo inalingana na ukingo wa nje wa muhuri wa mafuta na utupu, imepotoka kwa sababu uvumilivu wa kipimo haukidhi vipimo vya kawaida." Vipande vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa vya vifaa. Kama hali ya kazi ni ngumu sana na elastomer mpira ni incompatible na kazi kati, ugumu wa mpira huongezeka, au ugumu wa elastomer ni juu sana; Vifaa vya kuunganisha huongeza mpira na kupunguza ugumu wa mpira, na hivyo kusababisha uzee wa mapema na kuvaa kwa muhuri wa mafuta; 5. Uharibifu kutoka shaft kwa eneo la mdomo sealing itaacha tatizo kudumu siri ya utendaji sealing ya mfumo wa sealing; 6. lubricant kushindwa na mfumo ni katika hali ya kavu-kuendesha hivyo kwamba mdomo sealing huvaa haraka; 7. Uzee wa kina wa elastomer ya mpira na vyombo vya usimamizi. 8. Uwe na mtazamo gani? "Mafuta-kaboni" uchafu ni kuundwa katika mdomo kufungwa, ambayo husababisha mdomo kufungwa ya muhuri mafuta kuwa kuinuliwa, kusababisha uvujaji wa mfumo wa kufungwa. 9. (a) Kwa nini? Ufungaji lip ya mafuta muhuri tena ifuatavyo vibration ya uso shaft na kupiga ya shaft; 10. Uchafuzi ni kudumu embedded katika makali ya kufungwa kutoka ndani na nje ya kufungwa, kusababisha kuvaa mapema ya uso shaft na mdomo kufungwa; Mchakato wa kusanyiko usio wa kawaida husababisha uharibifu wa uso wa mawasiliano wa shaft na kuvaa mapema kwa mdomo wa kufuli; Upande wa kufungia umeharibiwa wakati wa kuhifadhi, kusafirisha, na kukusanya. Kwa kuongezea, tunaweza kuchambua sababu za uvujaji kulingana na mwendo wa muda wa kufungwa kwa mafuta, kama vile uharibifu wa hatua ya mapema na uvujaji mwanzoni mwa matumizi; uharibifu wa mapema na uvujaji baada ya kipindi kifupi cha matumizi; uharibifu na uvujaji baada ya kipindi kirefu cha matumizi katika kazi; uharibifu na uvujaji mwishoni mwa maisha ya huduma iliyoundwa.