Sliding bearing performance analysis and test methods

Sliding bearing is one of the important parts on construction machinery, poor installation will affect its use effect, even result in engineering machinery and equipment failure. After bearing installed, if not done carefully alignment, alignment can lead to TIMKEN bearings under other loads, friction, and vibration. The use of these may accelerate fatigue and reduce the bearing life, and it might damage the other machine parts service life. In addition, the increase of vibration and friction could significantly increase the risk of energy consumption and premature failure. If bearing with iron filings, burr, dust and other foreign matter to enter, will make the bearing noise and vibration during operation, even damage raceway and rolling body. So before the installation of bearings, must ensure that the installation surface and the environment clean. The lubrication of the sliding bearing operation and life have very important influence. Grease made out of base oil, thickener and additive. The performance of the grease is mainly determined by the base oil. The basis of generally low viscosity oil is suitable for low temperature, high speed; High viscosity is suitable for high temperature, high load. Thickener and relationship with lubrication performance, thickening agent, water resistance to the water resistance of the grease. In principle, different brand of grease can't mix, and even the same thickening agent of grease, will also bring bad influence each other on the basis of different additives. TIMKEN bearing surface coated with anti-rust oil, must use clean petrol or kerosene cleaning carefully, then coated with clean, high quality or high speed high temperature lubricating grease before installation. Fully enclosed bearing not clean fuel. During the period of using, often should basic external conditions of bearing operation monitoring, such as temperature, vibration and noise measurement, etc. These regular check will help identify potential problems and to prevent unexpected machine to suspend the phenomenon, make the production plan, improve plant productivity and efficiency. In the process of operation, bearing requires correct lubrication again, perfect its performance. Sliding bearing lubrication method, divided into grease lubrication and oil lubrication. In order to make the TIMKEN bearing function well, first of all, to choose suitable for conditions of use, the purpose of lubrication method. If only consider lubrication and oil lubrication. But there are grease lubrication can simplify the structure of bearing around specialty. When we are in the use of sliding bearing, if it is found that the temperature is very high, is to stop the equipment running, and find out its reason, and provide solution for processing according to the above, but may be due to the reason of bearing heating is different, so the solution is also different, so still have to treat, particular case is particular completed with the help of the technical staff. First, check the sliding bearing vibration in the working situation from peeling, indentation, rust, crack and wear will reflect in the vibration measurement of sliding bearing, sliding bearing vibration is very sensitive for bearing damage, therefore, by adopting special sliding bearing vibration meter ( Frequency analyzer, etc. ) Can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. Due to the measured values for sliding TIMKEN bearing or sensor installation position and different using conditions, requires measurements of each machine in advance after analysis and comparison to determine the judgment standard. Second, check the sliding bearing because the voice of the situation when rolling bearing even with slight stripping damage, such as would an exception and irregular, and so with the sound of the measuring device can distinguish, USES the sound device, sliding bearing in operation to check the size of the rolling sound and quality, have the effect of prevention in advance. Third, we should check the temperature of the sliding bearing rotates if using the oil hole can directly measure temperature of the sliding bearing outer ring, is more appropriate. In general, the temperature of the sliding bearing, generally can be deduced according to the bearing on the surface of the outdoor temperature. If the appropriate lubrication, installation department, the sliding bearing temperature will rise sharply, appear unusually high temperature, must stop at this moment, take the necessary precautions. In general, the temperature of the sliding bearing with operation began to slowly rise TIMKEN bearing remission coating technology introduction and should be, 1 - After 2 hours to reach steady state. Normal temperature of the sliding bearing as the machine heat capacity, heat dissipating capacity, rotational speed and load. Both on the shaft and bearing seat, TIMKEN bearings require in the radial, axial and tangential direction to three directions such as fixed position. Radial and tangential positioning is realized through the tight fit of bearing ring, however, the axial positioning only in a few cases with tight fit; Generally USES the axial spacing parts, such as end cover and retainer could happen on the axial location clearance range.