Measurement of Effort in the Stator Core Tightening Prisms of Powerful Tur-Bogenerator Using Data on the Movement of the Compression Disc Spring Block in Pressure Accumulator

Abstract

The advantages and features of the use of pressure accumulators (CA) with blocks of conic springs for restoring and stabilizing the pressing pressure of the stator core of a powerful turbogenerator (TG), which are installed under the tightening nuts or instead of them on the threaded ends of the tightening prisms of the core, are described. It is shown that the measurement of the displacement of the compression disc spring in the CA makes it possible to estimate the current state of the pressing pressure. The use of a capacitive sensor of linear displacements, placed outside the CA, to control the movement of the spring block in the caseless CA is substantiated. According to the specified design parame-ters of the caseless CA and the value of the maximum stroke of the plate springs in it, a capacitive sensor with its speci-fied characteristics was developed. The method of monitoring the state of the TG stator core using the CA system with capacitive sensors on each CA and the control method with the alternate use of one disk spring travel meter are de-scribed. Ref. 14, fig. 6. Key words: powerful turbogenerator, stator core, pressure, forces in the tightening prisms, power accumulator, displacement of block compression disc spring, capacitive sensor.