Steam turbines are made up of many parts, and each part has a role to play. So, what is the role of steam turbine fittings?
1, industrial steam turbine body: generally adopt island type (double layer layout), block type (single layer layout), by the boiler output of high temperature and high pressure steam blowing impeller rotation, the heat energy conversion into mechanical energy.
2, speed control system: industrial steam turbine unit parallel operation, according to the change speed deviation adjusting valve opening, regulate the amount of steam turbine and enthalpy drop, change the active power generator, the steam turbine when the load changes, automatic increase and decrease the quantity of steam admission, to keep the steam turbine under the rated speed (3000 r/min) and stable operation.
3, the critical guard: the critical guard is usually installed in the industrial turbine rotor is located in the shaft section of the front bearing seat, when the turbine speed control system fails, the speed exceeds 3300r/min, the critical guard action, the main valve will be closed, to prevent damage to the industrial turbine.
4, oil system: oil system is divided into lubricating oil system and regulation (protection) oil system two parts, is the supply of steam turbine and generator bearing lubricating oil and speed control system oil, its role is as follows:
A. Each bearing of the unit is supplied with oil to lubricate and cool the bearing.
B. Supply sufficient pressure oil to the regulating system and protection device to make them work normally.
C. Supply lubrication oil for each transmission mechanism.
Steam in the reaction turbine expansion in the stator blade, a decrease in pressure and temperature, flow rate increases, and then into the leaf blade (work), as a result of the moving blade along the flow direction between road cross section shape and stator blade slot a track section changes are the same, so the steam in the rotor blade continue to swell, pressure will reduce, because the steam flow along the arc flow direction in the rotor blade is changed, Blade, therefore, not only by the impact effect, at the same time by steam expansion in the moving blade, high speed spray from the moving blade produce power, the effect of impact power and the power of the resultant force is the dynamic blade on the force, that is to say, in a reaction turbine, steam heat energy into kinetic energy of the process, not only in the stator blade, also in the rotor blade.
