11-02-2013, 12:23 PM
DESIGN OF A GEAR COMPONENT IN A SPEED REDUCTION GEAR BOX USED IN A GAS TURBINE
DESIGN OF A GEAR .docx (Size: 14.72 KB / Downloads: 56)
ABSTRACT
A gas turbine, also called a combustion turbine, is a type of internal combustion engine. It has an upstream rotating compressor coupled to a downstream turbine, and a combustion chamber in-between. Energy is added to the gas stream in the combustor, where fuel is mixed with air and ignited. In the high pressure environment of the combustor, combustion of the fuel increases the temperature. The products of the combustion are forced into the turbine section. There, the high velocity and volume of the gas flow is directed through a nozzle over the turbine's blades, spinning the turbine which powers the compressor and, for some turbines, drives their mechanical output. The energy given up to the turbine comes from the reduction in the temperature and pressure of the exhaust gas.
The energy produced by the gas turbine is very high and the gas turbine rotates at a speed of approximately15000 rpm 5100 rpm. Due to its high speed factor, the gas turbine cannot be coupled to the generator directly (which has to rotate at 3000 RPM - 50Hz). So, Hence an intermediate speed reduction gear box is used to transfer transmit the required energy to the generator. The speed reduction gear box consists of a series of gears mounted on shafts a pair of High & Low speed shafts which transfer transmit the torque at the required speed of Generator only the reqired energy.
So a lot A number of parameters are taken into consideration to(while) design(ing) a reduction gear box used in these kind of applications as it involves very high speeds and Torques. The various parameters taken into consideration are are type of material used in manufacturing the gear component, resistance of the material to different temperatures, various stresses induced, wear and tear of the material etc. So Considering taking the above parameters into account the gear components in the reduction gear box (are)is designed.