Bearing speed measurement

Bearing speed measurement check of the condition of the bearing during operation and thorough examination of preparatory plan has been more and more serious. And bearing as the focus of attention, because it is the most important of all mechanical rotating parts. Bearing operation is bad to bring damage to the mechanical condition, monitoring is an important part of the preventive maintenance, early detection of bearing damage to avoid, because of the bearing damage caused by the unscheduled maintenance equipment during outage. A given bearing speed of reference on behalf of its speed under certain operating conditions. At this speed, the heat generated by the bearing and from escaping through the bearing to the shaft rod, bearing and lubricant to achieve a balance of heat. According to the ISO15312 standard, achieve the heat balance terms of reference is: - again on 20 degrees centigrade temperature increase 50 degrees, namely bearing temperature is 70 degrees Celsius, measurement point is fixed outer ring of bearing or bearing washer; - radial bearing: a steady radial load, accounting for 5% of the basic static load rating C0 - thrust bearing: a stable axial load, accounting for 2% of the basic static load rating C0 - with conventional open bearings used for oil lubricated bearing clearance: - lubricant: mineral oil, without EP additives in 70 degrees Celsius when the kinematic viscosity of argument was/s (= 12 ISOVG32) ( For radial bearing) ν=24mm2/s( ISOVG68) for( Used in the thrust roller bearings) - lubrication methods: oil bath, oil reached the lowest position in the middle of the roller. Bearing can't keep it running, to the bearing will be fever, speed adjustment, testing bearing at run time state, avoid the destruction of the bearings.