Long life of rolling bearing applications
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Widely used in car transmission of ball bearing, the actual service life of the original juice than according to the standard methods to calculate the rated life is short, to early fatigue spalling and noise is very high. Other parts of the car bearing life are higher than the rated life.
(2) the failure analysis
After examination, the quality of the gear box is good, the bearings with normal installation, lubrication, the upper half of the original of lubricating oil is not bearing suspicion be ruled out. But all inner ring channel indentation or pit or fatigue spalling surface checking type, rather than the mold surface spalling damage, oil supply full does not occur this kind of phenomenon.
Discovery channel surface with iron, copper, aluminum, zinc and other metal particles, sand, plastic and rubber etc. Nonmetal crumbs.
Judgment: the foreign body and the indentation damage caused by the integrity of the oil film, become the cause of premature failure of the bearing fatigue experiment validation, that judgment is right.
(3) solution
Had to increase the steel ball, special heat treatment, and even bearing, double row spherical and vacuum remelting steel becomes more and more expensive, and improve the life not by much.
Finally developed into a "clean" seal type bearing, was a great success. This kind of bearing is the original with a standard bearing on each side with a special structure of rubber sealing ring, characteristic is that the sealing ring is mainly used to prevent dirt intrusion of bearings, and with the main purpose is to keep the oil - bearing sealing ring is different.
(4) effect and its development situation
Seal type clean bearing on the simulation test shows the experimental life than the original of the same size with bearing more than seven times higher, even the smaller sizes of this kind of bearing, its experimental life also increased more than four times.
This kind of bearing with low price, allows the use of cheap high quality grease commonly, running low noise, reliable work, with 25 kinds of specifications, this type of bearing used in the different kinds of 25 kinds of cars and trucks in the gearbox to replace the original use of the more expensive and short service life, often a problem of the bearing.
Seal type clean short cylindrical roller bearing and taper roller bearing, has been in all kinds of steel rolling equipment has been applied effectively, this form of bearing went on to other areas of application development.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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(1) problem is proposedWidely used in car transmission of ball bearing, the actual service life of the original juice than according to the standard methods to calculate the rated life is short, to early fatigue spalling and noise is very high. Other parts of the car bearing life are higher than the rated life.
(2) the failure analysis
After examination, the quality of the gear box is good, the bearings with normal installation, lubrication, the upper half of the original of lubricating oil is not bearing suspicion be ruled out. But all inner ring channel indentation or pit or fatigue spalling surface checking type, rather than the mold surface spalling damage, oil supply full does not occur this kind of phenomenon.
Discovery channel surface with iron, copper, aluminum, zinc and other metal particles, sand, plastic and rubber etc. Nonmetal crumbs.
Judgment: the foreign body and the indentation damage caused by the integrity of the oil film, become the cause of premature failure of the bearing fatigue experiment validation, that judgment is right.
(3) solution
Had to increase the steel ball, special heat treatment, and even bearing, double row spherical and vacuum remelting steel becomes more and more expensive, and improve the life not by much.
Finally developed into a "clean" seal type bearing, was a great success. This kind of bearing is the original with a standard bearing on each side with a special structure of rubber sealing ring, characteristic is that the sealing ring is mainly used to prevent dirt intrusion of bearings, and with the main purpose is to keep the oil - bearing sealing ring is different.
(4) effect and its development situation
Seal type clean bearing on the simulation test shows the experimental life than the original of the same size with bearing more than seven times higher, even the smaller sizes of this kind of bearing, its experimental life also increased more than four times.
This kind of bearing with low price, allows the use of cheap high quality grease commonly, running low noise, reliable work, with 25 kinds of specifications, this type of bearing used in the different kinds of 25 kinds of cars and trucks in the gearbox to replace the original use of the more expensive and short service life, often a problem of the bearing.
Seal type clean short cylindrical roller bearing and taper roller bearing, has been in all kinds of steel rolling equipment has been applied effectively, this form of bearing went on to other areas of application development.
