2. A shaft carrying a 10KN load is supported by two identical plain journal bearings. The shaft, which normally rotates...
2. A shaft carrying a 10KN load is supported by two identical plain journal bearings. The shaft, which normally rotates at 3000 rev/min has, at the bearing region, a nominal diameter of 50 mm and a length of 16 mm. Starting with a radial clearance ratio of 0.0015 and neglecting thermal effects a) Calculate the temperature of the lubricant which will produce an eccentricity ratio of 0.7 if the oil used is SAE10 b) Comment of the necessity to supply...
3. A 100 mm diameter shaft is supported by a bearing 50 mm long with a minimum oil-film thickness of 0.02 mm and radial clearance of 0.06 mm. It is lubricated by SAE 30 oil. The bearing carries a load of 4 kN of at 900 rpm. Employing the design charts, determine The temperature of the oil film • • The coefficient of friction • The friction power
A 3-inch diameter ground shaft rotates at 1000 rev/min in a lathe turned full journal bearing, which is 3 in long. SAE Grade 20 lubricant is used and the lubricant sump has a steady-state temperature of 100°F. The maximum lubricant temperature must not exceed 200°F. Analyze the assembly assuming average clearance and a H8/f8 clearance fit. Determine the following: a. The maximum radial load that the journal can carry and still operate under thick-film lubrication conditions. (6 points) b. The...
A journal bearing has a shaft diameter of 78.00 mm with a unilateral tolerance of -0.02 mm. The bushing bore has a diameter of 78.10 mm with a unilateral tolerance of 0.06 mm. The bushing is 36 mm long and supports a load of 2 kN. The journal speed is 720 rev/min. For the minimum clearance assembly find the minimum film thickness, the heat loss rate, and the maximum lubricant pressure for SAE 10 and SAE 30 lubricants operating at...
A journal bearing has a shaft diameter of 75.00-mm with a unilateral tolerance of -0.02 mm. The bushing bore has a diameter of 75.10 mm with a unilateral tolerance of 0.06 mm. The bushing is 36 mm long and supports a load of 2 kN. The journal speed is 720 rpm. For the minimum clearance assembly find the minimum film thickness and the maximum lubricant pressure for SAE 20 and SAE 40 lubricants operating at an average film temperature of...
Assume Kr 1 and Ka In a journal bearing assembly, the shaft has a diameter of 88.900 mm and a bilateral tolerance of + 0.076 mm. The bushing bore diameter is 89.027 mm with a unilateral tolerance of +0:0.119 mm. The bushing length is 50 mm. The SAE 30 oil has an average operating temperature 60°C. For a minimum radial clearance, a speed of 1000 rev/min, and a radial load of 20 kN, find the maximum bearing pressure and its...
5) [10] A journal bearing has a journal diameter of 75 mm with a unilateral tolerance of - 0.075 mm. The bushing bore has a diameter of 75.15 mm and a unilateral tolerance of 0.1 mm. The busing is 75 mm long and supports a 2585 N load. The journal speed is 750 rev/min. Find the minimum oil film thickness and the maximum film pressure for SAE 20W lubricant at an operating temperature of 65 °C for the minimum clearance...
6. A journal bearing has shaft with a diameter of 75 mm. The bushing bore is 75.1 mm and the bushing is 37.5 mm long and supports a load of 2 kN. The journal Speed is 720 RPM. Find the minimum film thickness, the heat loss rate is SAE 20 oil and the operating temperature is 60 C.
6. A journal bearing has shaft with a diameter of 75 mm. The bushing bore is 75.1 mm and the bushing is...
Problem 2: A pressure-fed bearing has a journal diameter of 50.00 mm. The length of the bearing is 55 mm with a 5 mm wide central annular groove. The bearing is fed by SAE 30 oil at 200 kPa supply gauge pressure. The journal speed is 2880 rev/min carrying a load of 10 kN. Use a minimum clearance of 0.042 mm and an average oil film temperature of 85°C to perform a design assessment using Trumpler's criteria.
Q.17. How much power is supplied to two meshed spur gears if the driving gear rotates at 2000 rpm, the torque 2.00 and its efficiency is 96%? driven gear is 1.00 kNm, the speed ratio of the drive is on a A. 204 kW B. 210 kW C. 109 kW D. 105 kW E. none of above (3 Marks) Q.18. Two meshed spur gears with a 210 mm centre distance and a module of 3.00 have arc of contact of...