250 MW KWU GOVERNING SYSTEM

In order to maintain the synchronous speed under changing load/grid or steam conditions, the KWU turbine supplied by BHEL at NTPC Korba is equipped with electro-hydraulic governor; fully backed-up by a hydraulic governor. The

measuring and processing of electrical signal offer the advantages such as flexibility, dynamic stability and simple representation of complicated

Turbine Bearing Arrangement

FIXED PIONTS (TURBINE EXPANSION)

      The fixed points of the turbine are as follows:

      a) All the bearing pedestal

      b) Middle of the longitudinal girder of Lp turbine

      c) The thrust bearing in HP-IP pedestal.

 

TG unit CONSTRUCTION OF BEARING NO.1

BEARING

The TG unit is mounted on 1 bearing.HPT rotor is mounted on two bearings, a double wedged journal bearing at the front and combined/journal bearing adjacent to front IP rotor coupling. The IP & LP rotors have a journal bearing each at the end of the shaft. The journal bearing of IP & LP rotors are self adjusting tragspiegal bearings. The bearing pedestals are

OILING SYSTEM FOR TURBINE

1. OIL SUPPLY:-

A single oil supply line lubricates and cools the bearing, governs the m/c and operates the hydraulic actuators and safety and protective devices.

During start-up & shut-down, aux oil pump supplies the control oil. Once the turbine speed is more than 2850 rpm, the main oil pump (M.O.P) takes over.It draws oil from main tank .The lubricating oil passes through oil cooler, before can be s upplied to the bearing (Under emergency, lube oil can be supplied by a DC oil pump).Before the turbine is turned or barred,

LUBE OIL COOLER FOR TURBINE

Lubricating oil reduces friction between moving mechanical parts and also removes heat from the components. As a result, the oil becomes hot. This heat is removed from the lube oil by a cooler to prevent both breakdown of the oil and damage to the mechanical components it serves. The lube oil temperature must be maintained within a specific operating band to ensure optimum equipment performance.