OPERATION METHOD OF THE STEAM TURBINE WITH THE STEAM AXIAL MOVEMENTS COUNTERFLOWS IN THE CYLINDERS OF HIGH AND MEDIUM PRESSURE

摘要

FIELD: power industry.;SUBSTANCE: operating method of the steam turbine (ST) with axial movements counterflows of the steam in the high and medium pressure cylinders (HPC 1 and 2 MPC) and steam intermediate reheat (SIR) after HPC 1. The method is that the axial forces unbalance on the thrust bearing (TB 17) of the shafting line 4 is controlled during the operation process in the specified allowable range, with continuous monitoring of the current values of the mentioned imbalance, the steam line (SL) 6 in HPC 1 directly, and MPC 2 - through the high-speed-reducing cooling device of high-pressure (HSRCD HP) 8 and the duct of the mentioned SIR. The difference: regulation of the mentioned unbalance value of the axial forces on the TB 17 is performed by changing the steam proportion, passing through the flow part of one of the mentioned cylinders relatively to the steam bypassed at the start of the ST into its capacitor (CP) 15, and the current value of the mentioned unbalance is controlled by the temperatures difference between the working and unworking shoe 18 sides of TB 17.;EFFECT: improving the measurement accuracy of the axial forces unbalance and elimination of the need to bypass the flow part pressure stages of the steam turbine.;2 dwg