4. Experimental facilities and measurements: The experimental setup consists of motor (1- phase 4-pole induction motor), two taper roller bearings, shaft, and V-belt pulley withhaving three speeds options. The material of shaft is mild steel. 4.1 Description of experimental set up Table 1. Description of experimental set up Bearing Specification Bearing used NBC-30205 (Taper roller bearing) Inside diameter of the bearing 25 mm Outside diameter of the bearing 52 mm Pitch circle diameter of the bearing (D) 38.5 mm Mean roller diameter (d) 6.39 mm Numbers of rollers (z) 17 Motor specification :- supply 220/230 V, 4.2 A, AC supply 0.5 HP Speed range (using pulley) 1150 rpm, 2050 rpm, 3050 rpm Rotor shaft specification: Diameter of the 28.5 mm. Length of the shaft 570 mm Distance between bearings 405.5 mm Density of the shaft 7850 kg/m3 Elasticity of the shaft 210000 Mpa Sensitivity of accelerometer 1000 mV/g Sampling rate of data acquisition 70000 sample/second In this analysis taper roller bearing (bearing number: 30205 nbc made) has been used. Geometrical configuration of the bearing is shown in the above table (Table 1).Here we had identified the defects in the rollers of the bearings. For this purpose groovedefects had been produced on the roller of the bearings.The approximate width and depth of the defect was 1.40 mm and 0.3 mm respectively. Figure 6 shows the different defects on the rollers of the bearing: Figure 6. Roller defect at 0o
4. Experimental facilities and measurements: The experimental setup consists of motor (1- phase 4-pole induction motor), two taper roller bearings, shaft, and V-belt pulley withhaving three speeds options. The material of shaft is mild steel. 4.1 Description of experimental set up Table 1. Description of experimental set up Bearing Specification Bearing used Inside diameter of the bearing Outside diameter of the bearing Pitch circle diameter of the bearing (D) Mean roller diameter (d) Numbers of rollers (z) NBC-30205 (Taper roller bearing) 25 mm 52 mm 38.5 mm 6.39 mm 17 Motor specification :- supply Speed range (using pulley) 220/230 V, 4.2 A, AC supply 0.5 HP 1150 rpm, 2050 rpm, 3050 rpm Rotor shaft specification: Diameter of the Length of the shaft Distance between bearings Density of the shaft Elasticity of the shaft 28.5 mm. 570 mm 405.5 mm 7850 kg/m3 210000 Mpa Sensitivity of accelerometer 1000 mV/g Sampling rate of data acquisition 70000 sample/second In this analysis taper roller bearing (bearing number: 30205 nbc made) has been used. Geometrical configuration of the bearing is shown in the above table (Table 1).Here we had identified the defects in the rollers of the bearings. For this purpose groovedefects had been produced on the roller of the bearings.The approximate width and depth of the defect was 1.40 mm and 0.3 mm respectively. Figure 6 shows the different defects on the rollers of the bearing: Figure 6. Roller defect at 0o
doc_10_04_2017_14_55_19.docx