Gear oil pump oil seal the cause of leakage

Today we are going to accept the cause of the oil leak from the oil pump seal:

1. Reasons for assembly

(1) due to pressure installation, resulting in the deformation of the oil seal after pressure loading;

In the assembly process, the oil seal through the thread or spline, resulting in the lip scratch;

Due to the low oil seal roughness, pressure force is too large, resulting in spring failure or lip turnover.

2. Skeleton reasons

The performance of oil seal spring fails due to material and manufacturing problems. The failure form of the spring is: the spring is too tight or too loose,

Too loose when the spring compression force is small, can not achieve the sealing effect, too tight when the spring compression force is large, oil seal and the rotation shaft with

Improper sealing, resulting in abnormal wear of oil seals, oil leakage.

3. Reasons for working medium

The working medium is oil. The choice of oil seal material should consider its compatibility with oil, the compatibility of the two is poor, will produce

Lip swelling, hardening, softening, cracking, oil leakage.

4. Causes of lip wear

(1) cleanliness problem: casting sand, machining iron, oil impurities, etc., a large number of oil seal lip parts, work

Abnormal wear occurs;

(2) the oil seal is not coaxial with the rotating axis, oil seal pressure after the occurrence of eccentric grinding, abnormal wear lip;

(3) oil seal lip lithium grease poor lubrication, dry friction will occur, resulting in abnormal wear.

5. Reasons for the axis

(1) rotating shaft surface roughness, hardness unreasonable.

(2) rotating shaft surface defects, such as: corrosion, scratches, directional knife marks.

Xingtai beilong internal combustion engine accessories co., LTD. (former julu beilong injection pump accessories factory) was founded in 1999, located in hebei xingtai julu houlu zhai industrial zone, is a professional manufacturer of internal combustion engine oil pump nozzle accessories. The company is mainly engaged in oil injection nozzle, oil nozzle pad, oil injection pump seals, oil injection pump parts and other products.