A pressure-fed bearing has a joumal diameter of 55.00 mm wvith a unilateral tolerance of -0.05 mm The bushing bore diameter is 50.084 mm with a unilateral tolerance of 0.10 mm. The length of the bushmg is 55 mm. Its central annular groove is 5 mm wide and is fed by SAE 30 oil is 55°C at 200 kPa supply gauge pressure. The journal speed is 2880 rev/min carrying a load of 10 kN. The sump ca dissipate 300 watts per bearing if necessary. For minimum radial clearances, find the minimum film thíckness and average temperature. Given the film temperature is 85°C Attach File Browse My Computer

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Q108 The fallowing data refers to a test ona single cylinder four stroke oil engine Cylinder bore 220mm; stroke 360mm; area of indicator diagram 360mm length af diagram 40mm; indicator Spring rating =1.25 mm/bar; Speed 300 rev/min brake load 441-3N at o.9m radius; fuel consumption 3.8 Kg/hr} Calorific Value of fuel 43124 kj/kg ; Cooling water flow 3.8kg/hrjrise intemperature of coaling water 48K;and specific heat capacity of water 4.1868 Kj|Kg.K 340d.13biliN Calculate: @ the mechanical efficiency the indicated thermal efficiencyui a The heat balance sheet expressed as ki/min andas percentage of the heat supplied to the engine.

Q: A multi disc clutch is used to transmit to 10 kW power at 900 rpm. If the external diameter of friction lining is 1.25 times the internal diameter, find the required dimensions of the friction lining and the axial force exerted by the oil chamber pressurized to engaged the disks a with disks b. The pressure between disks is limited to 0.085 N/mm?. Assume average service condition. The coefficient of friction may be taken as 0.3. Disks a Disks b Seals Oil chamber (pressurized to engage clutch) Piston Bushing Oil passage Output Key Key Input Oil passage Page 1 of 1