Operation and measurement of motor and winding insulation resistance are exactly the same, the determination of the bearing current method is to use the electric motors of the rolling bearing, shaft current measured referring to the following figure.
Improved many times, the study found that the main cause of the oil spill: is that between lateral bearing seat and the impeller impeller fan runtime for positive pressure area, the wind will be from the chassis and axle housing external aperture into the bearing chamber will be brought out lube oil, is: the fan impeller side bearing design flaws exist between the impeller and shaft sleeve, long running will appear loose phenomenon, shaft sleeve and the shaft collision and friction caused by clearance fit is too big, the wind gap into the bearing chamber will be brought out lube oil, speeds up the leakage.
Heat treatment process, before the grease grease English name: lubricatin -
Methyl amino acetonitrile rease;
Grease a thick grease semi solid.
When required, the bearing can be added to add in this article, for example: 'the needle roller bearings, full, drawn cup, without inner ring' or 'ring needle roller bearing cage, mechanism, without inner ring'.
Heat curing;
, convenient installation and disassembly for the bearing service life all cannot equate the service life of the host, in be used actually bearing as wearing parts often hurt.
As by the outer ring of rolling bearings of rolling bearing inner ring of rolling element and cage, on the inner surface of the outer ring and inner ring on the surface, usually have groove groove, rolling body movement along the groove.
Five, oil lubrication with oil mat of capillary effect, the oil pool of grease to the diameter of axle surface, this method can make the friction surface often keep clean, but the dust will plug wool stoma cause insufficient oil supply.
For bearing ring mating surface coated with a little oil or a little fat, don't be cool bearing: condensation of water can lead to the matching of the bearing and the bearing surface rust, ensure the shaft and bearing hole has a degree -
Degree of lead chamfer, after installation: for bearing loading lubricants, check whether the angular contact ball bearing configuration is working properly.
&
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Gray cast iron and cast iron ordinary gray iron or with nickel, chromium, titanium alloy wear resistant cast iron, or nodular cast iron, can be used as a bearing material.
Strike discharge small diameter bushing, better use ladder punch, punch of small diameter to match the bushing of the inner hole, large diameter smaller than about bushing diameter of punch.
Bearing should be heated to a temperature higher than the required temperature ℃ -
℃, combination bearings, for combination and face to face, back to back its load to the shaft or the order of the bearing is different, it is important to note.
When rotating too tight,
Set set of tighten too far)
；
Bearing noise (
The roller face or steel skid)
；
Excessive axial thermal elongation (
Axial additional load bearing is statically indeterminate)
;
Shoulder is too big,
The bearing seal and friction)
；
Holes of the block shoulder is too big,
Send the bearing seal touch misrepresenting)
；
Labyrinth seal gap is too small (
With the shaft friction)
；
Lock washer tooth bending (
The bearings and friction)
；
Left the position of the oil ring is not appropriate (
The flange cover and friction)
；
On the ball or roller pressure pit (
Installed with a hammer bearing caused by)
；
Bearing noise (
There are foreign source interference)
；
Bearing and deformation (heated
Use the spray heat sealed bearing caused by)
；
Shaft is too coarse to make actual fit too tight (
Cause the bearing temperature too high or noise)
；
Small diameter of hole,
Cause high bearing temperature)
；
Bearing hole diameter is too large.
