Round Ductile Manhole Cover is made of ductile;
mainly both the cover and frame is in round condition, we make the manhole
cover on BS EN124, Mainly our products are A15, B125, C250 and D400, sometimes
also make it E600 and F900 in case of need. For A15, B125, C250 and D400
ductile manhole covers to be used in Green belt, Pavement, Auxiliary road, Main
road and Express way. We make ductile manhole covers all by producing line, the
quality is very good, and we warmly welcome customers all over the world to do
business with us.
Ductile round manhole covers, Ductile round manhole covers D400, Ductile round manhole covers opening 600. Zhoushan Runchun Import & Export Co., Ltd. , https://www.en124casting.com
/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> Self-aligning ball bearing problem and work view key and usual protection tips Self-aligning ball bearing fault reason and work view work key peace of mind protection tips
After the TIMKEN bearing equipment is completed; in order to check whether the equipment is correct; to check the work. The small machine can be rotated by hand; to admit whether it can rotate smoothly. Check the project for the work caused by foreign objects, scratches and indentations; Poor equipment; the torque generated by the equipment seat is not stable; the torque is too large due to too small clearance, equipment error, seal conflict, etc. If there is no abnormality, the power can be started. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Large machinery can't be rotated manually; therefore, the power is blocked immediately after the no-load start; the machine is idling; check whether there is oscillation, noise, whether the rotating parts can touch, etc.; after acknowledging that there is no abnormality; enter the power work.
Power work; starting from no-load low-speed; slowly progressing to additional work for the specified conditions. Check the items in the test work; whether there are abnormal sounds, changes in the temperature of the ball bearings, leakage or discoloration of the smoothing agent, etc. If it is found to be abnormal; it should be intermittent work; view the machinery; if necessary, remove the bearing to view.
TIMKEN bearing temperature; generally can be estimated according to the external temperature of the bearing housing. But the oil hole directly measures the temperature of the outer ring of the bearing more accurately. The bearing temperature; gradually rises from the beginning of the work; generally the temperature is stable after 1~2 hours. If the bearing Poor equipment; temperature will rise sharply; abnormal high temperature occurs. The reasons are such as excessive smoothing agent, too small bearing clearance, poor equipment, excessive conflict of sealing equipment, etc. High-speed rotation; TIMKEN bearing layout, smooth method selection fault Etc. is also the reason.
The transition sound of TIMKEN bearing is viewed with a stethoscope, etc.; there are strong metal noise, abnormal sound, irregular sound, etc. to clarify the abnormality. The reason is poor smoothness, poor accuracy of shaft or bearing seat, bearing damage, foreign matter intrusion, etc.
The effect of the oxygen on the surface of the steel and the oxygen in the air under transient high-temperature effect; the thin layer of iron oxide which is raised to the pole of 20 to 30 nm. It is worth noting that the thickness of the oxide layer is in correspondence with the test results of the total thickness of the surface grinding layer. This clarifies that the thickness of the oxide layer is directly related to the grinding process; it is an important marker of the quality of the grinding.
1, the first must be to buy a true self-aligning ball bearing; if you bought a fake bearing in how to do it can not live.
2, before the equipment bearing; the first thing to look at whether the bearing can be lack of oil, can be hygienic; then look at the parts of the machine to be equipment; after determining the smooth grease and sanitation; correct equipment bearings.
3, bearing trial; all equipment is good in the future; bearing trial work; work for a while to see no abnormalities; this bearing can normally enter the use of the situation.
4, to be regularly viewed; the smoothness of each TIMKEN bearing is essential; the bearing is not an exception; when protecting the bearing; the first thing to look at whether the bearing appearance is hygienic; if it is not hygienic; then use gasoline or Alcohol washes over; then it is a vital part; it is smooth grease. Give the bearing a smooth grease and cut too much smooth grease; just touch a little smooth grease in between; if any pollutants are present It can be felt. It is time to apply smooth grease to the self-aligning ball bearing; it should prevent any touch with the cotton fabric to the bearing; this will make some residual fibers can be tumbling and will form damage. The best Good time to check each time; then according to the normal time to see if the lack of oil can be hygienic; do a good job of these points of self-aligning ball bearings can be long-lived.
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Self-aligning ball bearing fault reason and work view work key peace of mind protection tips
Source: Bearing network time: 2014-09-29